Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
b811d2c2 | 3 | Copyright (C) 1994-2020 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" |
82ca8957 | 32 | #include "dwarf2/read.h" |
3054dd54 | 33 | #include "dwarf2/abbrev.h" |
162dce55 | 34 | #include "dwarf2/attribute.h" |
4057dfde | 35 | #include "dwarf2/comp-unit.h" |
82ca8957 TT |
36 | #include "dwarf2/index-cache.h" |
37 | #include "dwarf2/index-common.h" | |
f4382c45 | 38 | #include "dwarf2/leb.h" |
8fdd972c | 39 | #include "dwarf2/line-header.h" |
4de283e4 TT |
40 | #include "bfd.h" |
41 | #include "elf-bfd.h" | |
42 | #include "symtab.h" | |
43 | #include "gdbtypes.h" | |
44 | #include "objfiles.h" | |
d55e5aa6 | 45 | #include "dwarf2.h" |
4de283e4 TT |
46 | #include "buildsym.h" |
47 | #include "demangle.h" | |
48 | #include "gdb-demangle.h" | |
4de283e4 TT |
49 | #include "filenames.h" /* for DOSish file names */ |
50 | #include "macrotab.h" | |
51 | #include "language.h" | |
52 | #include "complaints.h" | |
82ca8957 TT |
53 | #include "dwarf2/expr.h" |
54 | #include "dwarf2/loc.h" | |
4de283e4 TT |
55 | #include "cp-support.h" |
56 | #include "hashtab.h" | |
57 | #include "command.h" | |
d55e5aa6 | 58 | #include "gdbcmd.h" |
4de283e4 TT |
59 | #include "block.h" |
60 | #include "addrmap.h" | |
61 | #include "typeprint.h" | |
62 | #include "psympriv.h" | |
4de283e4 | 63 | #include "c-lang.h" |
d55e5aa6 | 64 | #include "go-lang.h" |
4de283e4 TT |
65 | #include "valprint.h" |
66 | #include "gdbcore.h" /* for gnutarget */ | |
67 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
68 | #include "gdb_bfd.h" |
69 | #include "f-lang.h" | |
70 | #include "source.h" | |
4de283e4 | 71 | #include "build-id.h" |
d55e5aa6 | 72 | #include "namespace.h" |
268a13a5 TT |
73 | #include "gdbsupport/function-view.h" |
74 | #include "gdbsupport/gdb_optional.h" | |
75 | #include "gdbsupport/underlying.h" | |
268a13a5 | 76 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 77 | #include "filename-seen-cache.h" |
b32b108a | 78 | #include "producer.h" |
4de283e4 | 79 | #include <fcntl.h> |
4de283e4 | 80 | #include <algorithm> |
4de283e4 | 81 | #include <unordered_map> |
268a13a5 | 82 | #include "gdbsupport/selftest.h" |
c9317f21 | 83 | #include "rust-lang.h" |
268a13a5 | 84 | #include "gdbsupport/pathstuff.h" |
edd45eb0 | 85 | #include "count-one-bits.h" |
0d79cdc4 | 86 | #include "debuginfod-support.h" |
437afbb8 | 87 | |
73be47f5 DE |
88 | /* When == 1, print basic high level tracing messages. |
89 | When > 1, be more verbose. | |
b4f54984 DE |
90 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
91 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 92 | |
d97bc12b | 93 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 94 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 95 | |
27e0867f | 96 | /* When non-zero, dump line number entries as they are read in. */ |
8fdd972c | 97 | unsigned int dwarf_line_debug = 0; |
27e0867f | 98 | |
491144b5 CB |
99 | /* When true, cross-check physname against demangler. */ |
100 | static bool check_physname = false; | |
900e11f9 | 101 | |
491144b5 CB |
102 | /* When true, do not reject deprecated .gdb_index sections. */ |
103 | static bool use_deprecated_index_sections = false; | |
481860b3 | 104 | |
5bfd760d | 105 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 106 | |
f1e6e072 TT |
107 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
108 | ||
109 | static int dwarf2_locexpr_index; | |
110 | static int dwarf2_loclist_index; | |
111 | static int dwarf2_locexpr_block_index; | |
112 | static int dwarf2_loclist_block_index; | |
113 | ||
3f563c84 PA |
114 | /* An index into a (C++) symbol name component in a symbol name as |
115 | recorded in the mapped_index's symbol table. For each C++ symbol | |
116 | in the symbol table, we record one entry for the start of each | |
117 | component in the symbol in a table of name components, and then | |
118 | sort the table, in order to be able to binary search symbol names, | |
119 | ignoring leading namespaces, both completion and regular look up. | |
120 | For example, for symbol "A::B::C", we'll have an entry that points | |
121 | to "A::B::C", another that points to "B::C", and another for "C". | |
122 | Note that function symbols in GDB index have no parameter | |
123 | information, just the function/method names. You can convert a | |
124 | name_component to a "const char *" using the | |
125 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
126 | ||
127 | struct name_component | |
128 | { | |
129 | /* Offset in the symbol name where the component starts. Stored as | |
130 | a (32-bit) offset instead of a pointer to save memory and improve | |
131 | locality on 64-bit architectures. */ | |
132 | offset_type name_offset; | |
133 | ||
134 | /* The symbol's index in the symbol and constant pool tables of a | |
135 | mapped_index. */ | |
136 | offset_type idx; | |
137 | }; | |
138 | ||
44ed8f3e PA |
139 | /* Base class containing bits shared by both .gdb_index and |
140 | .debug_name indexes. */ | |
141 | ||
142 | struct mapped_index_base | |
143 | { | |
22ca247e TT |
144 | mapped_index_base () = default; |
145 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
146 | ||
44ed8f3e PA |
147 | /* The name_component table (a sorted vector). See name_component's |
148 | description above. */ | |
149 | std::vector<name_component> name_components; | |
150 | ||
151 | /* How NAME_COMPONENTS is sorted. */ | |
152 | enum case_sensitivity name_components_casing; | |
153 | ||
154 | /* Return the number of names in the symbol table. */ | |
155 | virtual size_t symbol_name_count () const = 0; | |
156 | ||
157 | /* Get the name of the symbol at IDX in the symbol table. */ | |
158 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
159 | ||
160 | /* Return whether the name at IDX in the symbol table should be | |
161 | ignored. */ | |
162 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
163 | { | |
164 | return false; | |
165 | } | |
166 | ||
167 | /* Build the symbol name component sorted vector, if we haven't | |
168 | yet. */ | |
169 | void build_name_components (); | |
170 | ||
171 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
172 | possible matches for LN_NO_PARAMS in the name component | |
173 | vector. */ | |
174 | std::pair<std::vector<name_component>::const_iterator, | |
175 | std::vector<name_component>::const_iterator> | |
3b00ef10 TT |
176 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
177 | enum language lang) const; | |
44ed8f3e PA |
178 | |
179 | /* Prevent deleting/destroying via a base class pointer. */ | |
180 | protected: | |
181 | ~mapped_index_base() = default; | |
182 | }; | |
183 | ||
9291a0cd TT |
184 | /* A description of the mapped index. The file format is described in |
185 | a comment by the code that writes the index. */ | |
fc898b42 | 186 | struct mapped_index final : public mapped_index_base |
9291a0cd | 187 | { |
f00a2de2 PA |
188 | /* A slot/bucket in the symbol table hash. */ |
189 | struct symbol_table_slot | |
190 | { | |
191 | const offset_type name; | |
192 | const offset_type vec; | |
193 | }; | |
194 | ||
559a7a62 | 195 | /* Index data format version. */ |
3063847f | 196 | int version = 0; |
559a7a62 | 197 | |
f00a2de2 PA |
198 | /* The address table data. */ |
199 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 200 | |
3876f04e | 201 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 202 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 203 | |
9291a0cd | 204 | /* A pointer to the constant pool. */ |
3063847f | 205 | const char *constant_pool = nullptr; |
3f563c84 | 206 | |
44ed8f3e PA |
207 | bool symbol_name_slot_invalid (offset_type idx) const override |
208 | { | |
209 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 210 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 211 | } |
5c58de74 | 212 | |
3f563c84 PA |
213 | /* Convenience method to get at the name of the symbol at IDX in the |
214 | symbol table. */ | |
44ed8f3e | 215 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 216 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 217 | |
44ed8f3e PA |
218 | size_t symbol_name_count () const override |
219 | { return this->symbol_table.size (); } | |
9291a0cd TT |
220 | }; |
221 | ||
927aa2e7 JK |
222 | /* A description of the mapped .debug_names. |
223 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 224 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 225 | { |
ed2dc618 SM |
226 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
227 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
228 | {} | |
229 | ||
230 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
231 | bfd_endian dwarf5_byte_order; |
232 | bool dwarf5_is_dwarf64; | |
233 | bool augmentation_is_gdb; | |
234 | uint8_t offset_size; | |
235 | uint32_t cu_count = 0; | |
236 | uint32_t tu_count, bucket_count, name_count; | |
237 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
238 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
239 | const gdb_byte *name_table_string_offs_reordered; | |
240 | const gdb_byte *name_table_entry_offs_reordered; | |
241 | const gdb_byte *entry_pool; | |
242 | ||
243 | struct index_val | |
244 | { | |
245 | ULONGEST dwarf_tag; | |
246 | struct attr | |
247 | { | |
248 | /* Attribute name DW_IDX_*. */ | |
249 | ULONGEST dw_idx; | |
250 | ||
251 | /* Attribute form DW_FORM_*. */ | |
252 | ULONGEST form; | |
253 | ||
254 | /* Value if FORM is DW_FORM_implicit_const. */ | |
255 | LONGEST implicit_const; | |
256 | }; | |
257 | std::vector<attr> attr_vec; | |
258 | }; | |
259 | ||
260 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
261 | ||
262 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
263 | |
264 | /* Implementation of the mapped_index_base virtual interface, for | |
265 | the name_components cache. */ | |
266 | ||
267 | const char *symbol_name_at (offset_type idx) const override | |
268 | { return namei_to_name (idx); } | |
269 | ||
270 | size_t symbol_name_count () const override | |
271 | { return this->name_count; } | |
927aa2e7 JK |
272 | }; |
273 | ||
cd4fb1b2 | 274 | /* See dwarf2read.h. */ |
ed2dc618 | 275 | |
cd4fb1b2 | 276 | dwarf2_per_objfile * |
ed2dc618 SM |
277 | get_dwarf2_per_objfile (struct objfile *objfile) |
278 | { | |
5bfd760d | 279 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 280 | } |
c906108c | 281 | |
251d32d9 | 282 | /* Default names of the debugging sections. */ |
c906108c | 283 | |
233a11ab CS |
284 | /* Note that if the debugging section has been compressed, it might |
285 | have a name like .zdebug_info. */ | |
286 | ||
9cdd5dbd DE |
287 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
288 | { | |
251d32d9 TG |
289 | { ".debug_info", ".zdebug_info" }, |
290 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
291 | { ".debug_line", ".zdebug_line" }, | |
292 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 293 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 294 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 295 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 296 | { ".debug_str", ".zdebug_str" }, |
18a8505e | 297 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
43988095 | 298 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 299 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 300 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 301 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 302 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
303 | { ".debug_frame", ".zdebug_frame" }, |
304 | { ".eh_frame", NULL }, | |
24d3216f | 305 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
306 | { ".debug_names", ".zdebug_names" }, |
307 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 308 | 23 |
251d32d9 | 309 | }; |
c906108c | 310 | |
80626a55 | 311 | /* List of DWO/DWP sections. */ |
3019eac3 | 312 | |
80626a55 | 313 | static const struct dwop_section_names |
3019eac3 DE |
314 | { |
315 | struct dwarf2_section_names abbrev_dwo; | |
316 | struct dwarf2_section_names info_dwo; | |
317 | struct dwarf2_section_names line_dwo; | |
318 | struct dwarf2_section_names loc_dwo; | |
43988095 | 319 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
320 | struct dwarf2_section_names macinfo_dwo; |
321 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
322 | struct dwarf2_section_names str_dwo; |
323 | struct dwarf2_section_names str_offsets_dwo; | |
324 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
325 | struct dwarf2_section_names cu_index; |
326 | struct dwarf2_section_names tu_index; | |
3019eac3 | 327 | } |
80626a55 | 328 | dwop_section_names = |
3019eac3 DE |
329 | { |
330 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
331 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
332 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
333 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 334 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
335 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
336 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
337 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
338 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
339 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
340 | { ".debug_cu_index", ".zdebug_cu_index" }, |
341 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
342 | }; |
343 | ||
c906108c SS |
344 | /* local data types */ |
345 | ||
3da10d80 KS |
346 | /* Type used for delaying computation of method physnames. |
347 | See comments for compute_delayed_physnames. */ | |
348 | struct delayed_method_info | |
349 | { | |
350 | /* The type to which the method is attached, i.e., its parent class. */ | |
351 | struct type *type; | |
352 | ||
353 | /* The index of the method in the type's function fieldlists. */ | |
354 | int fnfield_index; | |
355 | ||
356 | /* The index of the method in the fieldlist. */ | |
357 | int index; | |
358 | ||
359 | /* The name of the DIE. */ | |
360 | const char *name; | |
361 | ||
362 | /* The DIE associated with this method. */ | |
363 | struct die_info *die; | |
364 | }; | |
365 | ||
e7c27a73 DJ |
366 | /* Internal state when decoding a particular compilation unit. */ |
367 | struct dwarf2_cu | |
368 | { | |
fcd3b13d SM |
369 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
370 | ~dwarf2_cu (); | |
371 | ||
372 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
373 | ||
c24bdb02 KS |
374 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
375 | Create the set of symtabs used by this TU, or if this TU is sharing | |
376 | symtabs with another TU and the symtabs have already been created | |
377 | then restore those symtabs in the line header. | |
378 | We don't need the pc/line-number mapping for type units. */ | |
379 | void setup_type_unit_groups (struct die_info *die); | |
380 | ||
381 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
382 | buildsym_compunit constructor. */ | |
383 | struct compunit_symtab *start_symtab (const char *name, | |
384 | const char *comp_dir, | |
385 | CORE_ADDR low_pc); | |
386 | ||
387 | /* Reset the builder. */ | |
388 | void reset_builder () { m_builder.reset (); } | |
389 | ||
d00adf39 | 390 | /* The header of the compilation unit. */ |
fcd3b13d | 391 | struct comp_unit_head header {}; |
e142c38c | 392 | |
d00adf39 | 393 | /* Base address of this compilation unit. */ |
fcd3b13d | 394 | CORE_ADDR base_address = 0; |
d00adf39 DE |
395 | |
396 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 397 | int base_known = 0; |
d00adf39 | 398 | |
e142c38c | 399 | /* The language we are debugging. */ |
fcd3b13d SM |
400 | enum language language = language_unknown; |
401 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 402 | |
fcd3b13d | 403 | const char *producer = nullptr; |
b0f35d58 | 404 | |
c24bdb02 | 405 | private: |
804d2729 TT |
406 | /* The symtab builder for this CU. This is only non-NULL when full |
407 | symbols are being read. */ | |
c24bdb02 | 408 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 409 | |
c24bdb02 | 410 | public: |
e142c38c DJ |
411 | /* The generic symbol table building routines have separate lists for |
412 | file scope symbols and all all other scopes (local scopes). So | |
413 | we need to select the right one to pass to add_symbol_to_list(). | |
414 | We do it by keeping a pointer to the correct list in list_in_scope. | |
415 | ||
416 | FIXME: The original dwarf code just treated the file scope as the | |
417 | first local scope, and all other local scopes as nested local | |
418 | scopes, and worked fine. Check to see if we really need to | |
419 | distinguish these in buildsym.c. */ | |
fcd3b13d | 420 | struct pending **list_in_scope = nullptr; |
e142c38c | 421 | |
b64f50a1 JK |
422 | /* Hash table holding all the loaded partial DIEs |
423 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 424 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
425 | |
426 | /* Storage for things with the same lifetime as this read-in compilation | |
427 | unit, including partial DIEs. */ | |
fcd3b13d | 428 | auto_obstack comp_unit_obstack; |
72bf9492 | 429 | |
ae038cb0 DJ |
430 | /* When multiple dwarf2_cu structures are living in memory, this field |
431 | chains them all together, so that they can be released efficiently. | |
432 | We will probably also want a generation counter so that most-recently-used | |
433 | compilation units are cached... */ | |
fcd3b13d | 434 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 435 | |
69d751e3 | 436 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
437 | struct dwarf2_per_cu_data *per_cu; |
438 | ||
439 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 440 | int last_used = 0; |
ae038cb0 | 441 | |
b64f50a1 JK |
442 | /* A hash table of DIE cu_offset for following references with |
443 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 444 | htab_t die_hash = nullptr; |
10b3939b DJ |
445 | |
446 | /* Full DIEs if read in. */ | |
fcd3b13d | 447 | struct die_info *dies = nullptr; |
10b3939b DJ |
448 | |
449 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
450 | units referenced by this one. Only set during full symbol processing; | |
451 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 452 | htab_t dependencies = nullptr; |
10b3939b | 453 | |
cb1df416 | 454 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 455 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
456 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
457 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
458 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
459 | to the line header as long as this DIE is being processed. See | |
460 | process_die_scope. */ | |
fcd3b13d | 461 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 462 | |
3da10d80 KS |
463 | /* A list of methods which need to have physnames computed |
464 | after all type information has been read. */ | |
c89b44cd | 465 | std::vector<delayed_method_info> method_list; |
3da10d80 | 466 | |
96408a79 | 467 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 468 | htab_t call_site_htab = nullptr; |
96408a79 | 469 | |
034e5797 DE |
470 | /* Non-NULL if this CU came from a DWO file. |
471 | There is an invariant here that is important to remember: | |
472 | Except for attributes copied from the top level DIE in the "main" | |
473 | (or "stub") file in preparation for reading the DWO file | |
18a8505e | 474 | (e.g., DW_AT_addr_base), we KISS: there is only *one* CU. |
034e5797 DE |
475 | Either there isn't a DWO file (in which case this is NULL and the point |
476 | is moot), or there is and either we're not going to read it (in which | |
477 | case this is NULL) or there is and we are reading it (in which case this | |
478 | is non-NULL). */ | |
fcd3b13d | 479 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 | 480 | |
18a8505e | 481 | /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present. |
1dbab08b | 482 | Note this value comes from the Fission stub CU/TU's DIE. */ |
18a8505e | 483 | gdb::optional<ULONGEST> addr_base; |
3019eac3 | 484 | |
18a8505e | 485 | /* The DW_AT_rnglists_base attribute if present. |
1dbab08b | 486 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 487 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
488 | be used without needing to know whether DWO files are in use or not. |
489 | N.B. This does not apply to DW_AT_ranges appearing in | |
490 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
491 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
18a8505e | 492 | DW_AT_rnglists_base *would* have to be applied, and we'd have to care |
ab435259 | 493 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ |
fcd3b13d | 494 | ULONGEST ranges_base = 0; |
2e3cf129 | 495 | |
c9317f21 TT |
496 | /* When reading debug info generated by older versions of rustc, we |
497 | have to rewrite some union types to be struct types with a | |
498 | variant part. This rewriting must be done after the CU is fully | |
499 | read in, because otherwise at the point of rewriting some struct | |
500 | type might not have been fully processed. So, we keep a list of | |
501 | all such types here and process them after expansion. */ | |
502 | std::vector<struct type *> rust_unions; | |
503 | ||
18a8505e AT |
504 | /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO |
505 | files, the value is implicitly zero. For DWARF 5 version DWO files, the | |
506 | value is often implicit and is the size of the header of | |
507 | .debug_str_offsets section (8 or 4, depending on the address size). */ | |
508 | gdb::optional<ULONGEST> str_offsets_base; | |
509 | ||
ae038cb0 | 510 | /* Mark used when releasing cached dies. */ |
9068261f | 511 | bool mark : 1; |
ae038cb0 | 512 | |
8be455d7 JK |
513 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
514 | This test is imperfect as there may exist optimized debug code not using | |
515 | any location list and still facing inlining issues if handled as | |
516 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 517 | bool has_loclist : 1; |
ba919b58 | 518 | |
9068261f | 519 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
520 | if all the producer_is_* fields are valid. This information is cached |
521 | because profiling CU expansion showed excessive time spent in | |
522 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
523 | bool checked_producer : 1; |
524 | bool producer_is_gxx_lt_4_6 : 1; | |
525 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 526 | bool producer_is_icc : 1; |
9068261f | 527 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 528 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 529 | |
9068261f | 530 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
531 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
532 | this information, but later versions do. */ | |
533 | ||
9068261f | 534 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
535 | |
536 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
537 | |
538 | /* If this CU was inherited by another CU (via specification, | |
539 | abstract_origin, etc), this is the ancestor CU. */ | |
540 | dwarf2_cu *ancestor; | |
541 | ||
542 | /* Get the buildsym_compunit for this CU. */ | |
543 | buildsym_compunit *get_builder () | |
544 | { | |
545 | /* If this CU has a builder associated with it, use that. */ | |
546 | if (m_builder != nullptr) | |
547 | return m_builder.get (); | |
548 | ||
549 | /* Otherwise, search ancestors for a valid builder. */ | |
550 | if (ancestor != nullptr) | |
551 | return ancestor->get_builder (); | |
552 | ||
553 | return nullptr; | |
554 | } | |
e7c27a73 DJ |
555 | }; |
556 | ||
094b34ac DE |
557 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
558 | This includes type_unit_group and quick_file_names. */ | |
559 | ||
560 | struct stmt_list_hash | |
561 | { | |
562 | /* The DWO unit this table is from or NULL if there is none. */ | |
563 | struct dwo_unit *dwo_unit; | |
564 | ||
565 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 566 | sect_offset line_sect_off; |
094b34ac DE |
567 | }; |
568 | ||
f4dc4d17 DE |
569 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
570 | an object of this type. */ | |
571 | ||
572 | struct type_unit_group | |
573 | { | |
0186c6a7 | 574 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
575 | To simplify things we create an artificial CU that "includes" all the |
576 | type units using this stmt_list so that the rest of the code still has | |
197400e8 | 577 | a "per_cu" handle on the symtab. */ |
094b34ac DE |
578 | struct dwarf2_per_cu_data per_cu; |
579 | ||
0186c6a7 DE |
580 | /* The TUs that share this DW_AT_stmt_list entry. |
581 | This is added to while parsing type units to build partial symtabs, | |
582 | and is deleted afterwards and not used again. */ | |
a8b3b8e9 | 583 | std::vector<signatured_type *> *tus; |
f4dc4d17 | 584 | |
43f3e411 | 585 | /* The compunit symtab. |
094b34ac | 586 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
587 | so we create an essentially anonymous symtab as the compunit symtab. */ |
588 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 589 | |
094b34ac DE |
590 | /* The data used to construct the hash key. */ |
591 | struct stmt_list_hash hash; | |
f4dc4d17 | 592 | |
f4dc4d17 DE |
593 | /* The symbol tables for this TU (obtained from the files listed in |
594 | DW_AT_stmt_list). | |
595 | WARNING: The order of entries here must match the order of entries | |
596 | in the line header. After the first TU using this type_unit_group, the | |
597 | line header for the subsequent TUs is recreated from this. This is done | |
598 | because we need to use the same symtabs for each TU using the same | |
599 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
600 | there's no guarantee the line header doesn't have duplicate entries. */ | |
601 | struct symtab **symtabs; | |
602 | }; | |
603 | ||
73869dc2 | 604 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
605 | |
606 | struct dwo_sections | |
607 | { | |
608 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
609 | struct dwarf2_section_info line; |
610 | struct dwarf2_section_info loc; | |
43988095 | 611 | struct dwarf2_section_info loclists; |
09262596 DE |
612 | struct dwarf2_section_info macinfo; |
613 | struct dwarf2_section_info macro; | |
3019eac3 DE |
614 | struct dwarf2_section_info str; |
615 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
616 | /* In the case of a virtual DWO file, these two are unused. */ |
617 | struct dwarf2_section_info info; | |
fd5866f6 | 618 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
619 | }; |
620 | ||
c88ee1f0 | 621 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
622 | |
623 | struct dwo_unit | |
624 | { | |
625 | /* Backlink to the containing struct dwo_file. */ | |
626 | struct dwo_file *dwo_file; | |
627 | ||
628 | /* The "id" that distinguishes this CU/TU. | |
629 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
630 | Since signatures came first, we stick with it for consistency. */ | |
631 | ULONGEST signature; | |
632 | ||
633 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 634 | struct dwarf2_section_info *section; |
3019eac3 | 635 | |
9c541725 PA |
636 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
637 | sect_offset sect_off; | |
3019eac3 DE |
638 | unsigned int length; |
639 | ||
640 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
641 | cu_offset type_offset_in_tu; | |
642 | }; | |
643 | ||
73869dc2 DE |
644 | /* include/dwarf2.h defines the DWP section codes. |
645 | It defines a max value but it doesn't define a min value, which we | |
646 | use for error checking, so provide one. */ | |
647 | ||
648 | enum dwp_v2_section_ids | |
649 | { | |
650 | DW_SECT_MIN = 1 | |
651 | }; | |
652 | ||
80626a55 | 653 | /* Data for one DWO file. |
57d63ce2 DE |
654 | |
655 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
656 | appears in a DWP file). DWP files don't really have DWO files per se - | |
657 | comdat folding of types "loses" the DWO file they came from, and from | |
658 | a high level view DWP files appear to contain a mass of random types. | |
659 | However, to maintain consistency with the non-DWP case we pretend DWP | |
660 | files contain virtual DWO files, and we assign each TU with one virtual | |
661 | DWO file (generally based on the line and abbrev section offsets - | |
662 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
663 | |
664 | struct dwo_file | |
665 | { | |
51ac9db5 SM |
666 | dwo_file () = default; |
667 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
668 | ||
18a8505e | 669 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
80626a55 DE |
670 | For virtual DWO files the name is constructed from the section offsets |
671 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
672 | from related CU+TUs. */ | |
51ac9db5 | 673 | const char *dwo_name = nullptr; |
0ac5b59e DE |
674 | |
675 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 676 | const char *comp_dir = nullptr; |
3019eac3 | 677 | |
80626a55 DE |
678 | /* The bfd, when the file is open. Otherwise this is NULL. |
679 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 680 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 681 | |
73869dc2 DE |
682 | /* The sections that make up this DWO file. |
683 | Remember that for virtual DWO files in DWP V2, these are virtual | |
684 | sections (for lack of a better name). */ | |
51ac9db5 | 685 | struct dwo_sections sections {}; |
3019eac3 | 686 | |
33c5cd75 DB |
687 | /* The CUs in the file. |
688 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
689 | an extension to handle LLVM's Link Time Optimization output (where | |
690 | multiple source files may be compiled into a single object/dwo pair). */ | |
b0b6a987 | 691 | htab_up cus; |
3019eac3 DE |
692 | |
693 | /* Table of TUs in the file. | |
694 | Each element is a struct dwo_unit. */ | |
b0b6a987 | 695 | htab_up tus; |
3019eac3 DE |
696 | }; |
697 | ||
80626a55 DE |
698 | /* These sections are what may appear in a DWP file. */ |
699 | ||
700 | struct dwp_sections | |
701 | { | |
73869dc2 | 702 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
703 | struct dwarf2_section_info str; |
704 | struct dwarf2_section_info cu_index; | |
705 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
706 | |
707 | /* These are only used by DWP version 2 files. | |
708 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
709 | sections are referenced by section number, and are not recorded here. | |
710 | In DWP version 2 there is at most one copy of all these sections, each | |
711 | section being (effectively) comprised of the concatenation of all of the | |
712 | individual sections that exist in the version 1 format. | |
713 | To keep the code simple we treat each of these concatenated pieces as a | |
714 | section itself (a virtual section?). */ | |
715 | struct dwarf2_section_info abbrev; | |
716 | struct dwarf2_section_info info; | |
717 | struct dwarf2_section_info line; | |
718 | struct dwarf2_section_info loc; | |
719 | struct dwarf2_section_info macinfo; | |
720 | struct dwarf2_section_info macro; | |
721 | struct dwarf2_section_info str_offsets; | |
722 | struct dwarf2_section_info types; | |
80626a55 DE |
723 | }; |
724 | ||
73869dc2 DE |
725 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
726 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 727 | |
73869dc2 | 728 | struct virtual_v1_dwo_sections |
80626a55 DE |
729 | { |
730 | struct dwarf2_section_info abbrev; | |
731 | struct dwarf2_section_info line; | |
732 | struct dwarf2_section_info loc; | |
733 | struct dwarf2_section_info macinfo; | |
734 | struct dwarf2_section_info macro; | |
735 | struct dwarf2_section_info str_offsets; | |
736 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 737 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
738 | struct dwarf2_section_info info_or_types; |
739 | }; | |
740 | ||
73869dc2 DE |
741 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
742 | In version 2, the sections of the DWO files are concatenated together | |
743 | and stored in one section of that name. Thus each ELF section contains | |
744 | several "virtual" sections. */ | |
745 | ||
746 | struct virtual_v2_dwo_sections | |
747 | { | |
748 | bfd_size_type abbrev_offset; | |
749 | bfd_size_type abbrev_size; | |
750 | ||
751 | bfd_size_type line_offset; | |
752 | bfd_size_type line_size; | |
753 | ||
754 | bfd_size_type loc_offset; | |
755 | bfd_size_type loc_size; | |
756 | ||
757 | bfd_size_type macinfo_offset; | |
758 | bfd_size_type macinfo_size; | |
759 | ||
760 | bfd_size_type macro_offset; | |
761 | bfd_size_type macro_size; | |
762 | ||
763 | bfd_size_type str_offsets_offset; | |
764 | bfd_size_type str_offsets_size; | |
765 | ||
766 | /* Each DWP hash table entry records one CU or one TU. | |
767 | That is recorded here, and copied to dwo_unit.section. */ | |
768 | bfd_size_type info_or_types_offset; | |
769 | bfd_size_type info_or_types_size; | |
770 | }; | |
771 | ||
80626a55 DE |
772 | /* Contents of DWP hash tables. */ |
773 | ||
774 | struct dwp_hash_table | |
775 | { | |
73869dc2 | 776 | uint32_t version, nr_columns; |
80626a55 | 777 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
778 | const gdb_byte *hash_table, *unit_table; |
779 | union | |
780 | { | |
781 | struct | |
782 | { | |
783 | const gdb_byte *indices; | |
784 | } v1; | |
785 | struct | |
786 | { | |
787 | /* This is indexed by column number and gives the id of the section | |
788 | in that column. */ | |
789 | #define MAX_NR_V2_DWO_SECTIONS \ | |
790 | (1 /* .debug_info or .debug_types */ \ | |
791 | + 1 /* .debug_abbrev */ \ | |
792 | + 1 /* .debug_line */ \ | |
793 | + 1 /* .debug_loc */ \ | |
794 | + 1 /* .debug_str_offsets */ \ | |
795 | + 1 /* .debug_macro or .debug_macinfo */) | |
796 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
797 | const gdb_byte *offsets; | |
798 | const gdb_byte *sizes; | |
799 | } v2; | |
800 | } section_pool; | |
80626a55 DE |
801 | }; |
802 | ||
803 | /* Data for one DWP file. */ | |
804 | ||
805 | struct dwp_file | |
806 | { | |
400174b1 TT |
807 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
808 | : name (name_), | |
809 | dbfd (std::move (abfd)) | |
810 | { | |
811 | } | |
812 | ||
80626a55 DE |
813 | /* Name of the file. */ |
814 | const char *name; | |
815 | ||
73869dc2 | 816 | /* File format version. */ |
400174b1 | 817 | int version = 0; |
73869dc2 | 818 | |
93417882 | 819 | /* The bfd. */ |
400174b1 | 820 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
821 | |
822 | /* Section info for this file. */ | |
400174b1 | 823 | struct dwp_sections sections {}; |
80626a55 | 824 | |
57d63ce2 | 825 | /* Table of CUs in the file. */ |
400174b1 | 826 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
827 | |
828 | /* Table of TUs in the file. */ | |
400174b1 | 829 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 830 | |
19ac8c2e | 831 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
48b490f2 TT |
832 | htab_up loaded_cus; |
833 | htab_up loaded_tus; | |
80626a55 | 834 | |
73869dc2 DE |
835 | /* Table to map ELF section numbers to their sections. |
836 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
837 | unsigned int num_sections = 0; |
838 | asection **elf_sections = nullptr; | |
80626a55 DE |
839 | }; |
840 | ||
0963b4bd MS |
841 | /* Struct used to pass misc. parameters to read_die_and_children, et |
842 | al. which are used for both .debug_info and .debug_types dies. | |
843 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 844 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
845 | |
846 | struct die_reader_specs | |
847 | { | |
a32a8923 | 848 | /* The bfd of die_section. */ |
93311388 DE |
849 | bfd* abfd; |
850 | ||
851 | /* The CU of the DIE we are parsing. */ | |
852 | struct dwarf2_cu *cu; | |
853 | ||
80626a55 | 854 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
855 | struct dwo_file *dwo_file; |
856 | ||
dee91e82 | 857 | /* The section the die comes from. |
3019eac3 | 858 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
859 | struct dwarf2_section_info *die_section; |
860 | ||
861 | /* die_section->buffer. */ | |
d521ce57 | 862 | const gdb_byte *buffer; |
f664829e DE |
863 | |
864 | /* The end of the buffer. */ | |
865 | const gdb_byte *buffer_end; | |
a2ce51a0 | 866 | |
685af9cd TT |
867 | /* The abbreviation table to use when reading the DIEs. */ |
868 | struct abbrev_table *abbrev_table; | |
93311388 DE |
869 | }; |
870 | ||
c0ab21c2 TT |
871 | /* A subclass of die_reader_specs that holds storage and has complex |
872 | constructor and destructor behavior. */ | |
873 | ||
874 | class cutu_reader : public die_reader_specs | |
875 | { | |
876 | public: | |
877 | ||
878 | cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
879 | struct abbrev_table *abbrev_table, | |
6751ebae | 880 | int use_existing_cu, |
c0ab21c2 TT |
881 | bool skip_partial); |
882 | ||
883 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
884 | struct dwarf2_cu *parent_cu = nullptr, | |
885 | struct dwo_file *dwo_file = nullptr); | |
886 | ||
c0ab21c2 TT |
887 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
888 | ||
889 | const gdb_byte *info_ptr = nullptr; | |
890 | struct die_info *comp_unit_die = nullptr; | |
c0ab21c2 TT |
891 | bool dummy_p = false; |
892 | ||
6751ebae TT |
893 | /* Release the new CU, putting it on the chain. This cannot be done |
894 | for dummy CUs. */ | |
895 | void keep (); | |
896 | ||
c0ab21c2 TT |
897 | private: |
898 | void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 899 | int use_existing_cu); |
c0ab21c2 TT |
900 | |
901 | struct dwarf2_per_cu_data *m_this_cu; | |
c0ab21c2 TT |
902 | std::unique_ptr<dwarf2_cu> m_new_cu; |
903 | ||
904 | /* The ordinary abbreviation table. */ | |
905 | abbrev_table_up m_abbrev_table_holder; | |
906 | ||
907 | /* The DWO abbreviation table. */ | |
908 | abbrev_table_up m_dwo_abbrev_table; | |
909 | }; | |
dee91e82 | 910 | |
c906108c | 911 | /* When we construct a partial symbol table entry we only |
0963b4bd | 912 | need this much information. */ |
6f06d47b | 913 | struct partial_die_info : public allocate_on_obstack |
c906108c | 914 | { |
6f06d47b YQ |
915 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
916 | ||
917 | /* Disable assign but still keep copy ctor, which is needed | |
918 | load_partial_dies. */ | |
919 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
920 | ||
52356b79 YQ |
921 | /* Adjust the partial die before generating a symbol for it. This |
922 | function may set the is_external flag or change the DIE's | |
923 | name. */ | |
924 | void fixup (struct dwarf2_cu *cu); | |
925 | ||
48fbe735 YQ |
926 | /* Read a minimal amount of information into the minimal die |
927 | structure. */ | |
928 | const gdb_byte *read (const struct die_reader_specs *reader, | |
929 | const struct abbrev_info &abbrev, | |
930 | const gdb_byte *info_ptr); | |
931 | ||
72bf9492 | 932 | /* Offset of this DIE. */ |
6f06d47b | 933 | const sect_offset sect_off; |
72bf9492 DJ |
934 | |
935 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 936 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 937 | |
72bf9492 | 938 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
939 | const unsigned int has_children : 1; |
940 | ||
72bf9492 DJ |
941 | unsigned int is_external : 1; |
942 | unsigned int is_declaration : 1; | |
943 | unsigned int has_type : 1; | |
944 | unsigned int has_specification : 1; | |
945 | unsigned int has_pc_info : 1; | |
481860b3 | 946 | unsigned int may_be_inlined : 1; |
72bf9492 | 947 | |
0c1b455e TT |
948 | /* This DIE has been marked DW_AT_main_subprogram. */ |
949 | unsigned int main_subprogram : 1; | |
950 | ||
72bf9492 DJ |
951 | /* Flag set if the SCOPE field of this structure has been |
952 | computed. */ | |
953 | unsigned int scope_set : 1; | |
954 | ||
fa4028e9 JB |
955 | /* Flag set if the DIE has a byte_size attribute. */ |
956 | unsigned int has_byte_size : 1; | |
957 | ||
ff908ebf AW |
958 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
959 | unsigned int has_const_value : 1; | |
960 | ||
98bfdba5 PA |
961 | /* Flag set if any of the DIE's children are template arguments. */ |
962 | unsigned int has_template_arguments : 1; | |
963 | ||
52356b79 | 964 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
965 | unsigned int fixup_called : 1; |
966 | ||
36586728 TT |
967 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
968 | unsigned int is_dwz : 1; | |
969 | ||
970 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
971 | unsigned int spec_is_dwz : 1; | |
972 | ||
72bf9492 | 973 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 974 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 975 | const char *name = nullptr; |
72bf9492 | 976 | |
abc72ce4 | 977 | /* The linkage name, if present. */ |
6f06d47b | 978 | const char *linkage_name = nullptr; |
abc72ce4 | 979 | |
72bf9492 DJ |
980 | /* The scope to prepend to our children. This is generally |
981 | allocated on the comp_unit_obstack, so will disappear | |
982 | when this compilation unit leaves the cache. */ | |
6f06d47b | 983 | const char *scope = nullptr; |
72bf9492 | 984 | |
95554aad TT |
985 | /* Some data associated with the partial DIE. The tag determines |
986 | which field is live. */ | |
987 | union | |
988 | { | |
989 | /* The location description associated with this DIE, if any. */ | |
990 | struct dwarf_block *locdesc; | |
991 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 992 | sect_offset sect_off; |
6f06d47b | 993 | } d {}; |
72bf9492 DJ |
994 | |
995 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
996 | CORE_ADDR lowpc = 0; |
997 | CORE_ADDR highpc = 0; | |
72bf9492 | 998 | |
93311388 | 999 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1000 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1001 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1002 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1003 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1004 | |
1005 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1006 | DW_AT_specification (or DW_AT_abstract_origin or | |
1007 | DW_AT_extension). */ | |
6f06d47b | 1008 | sect_offset spec_offset {}; |
72bf9492 DJ |
1009 | |
1010 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1011 | if any. */ | |
6f06d47b YQ |
1012 | struct partial_die_info *die_parent = nullptr; |
1013 | struct partial_die_info *die_child = nullptr; | |
1014 | struct partial_die_info *die_sibling = nullptr; | |
1015 | ||
1016 | friend struct partial_die_info * | |
1017 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1018 | ||
1019 | private: | |
1020 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1021 | partial_die_info (sect_offset sect_off) | |
1022 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1023 | { | |
1024 | } | |
1025 | ||
1026 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1027 | int has_children_) | |
1028 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1029 | { | |
1030 | is_external = 0; | |
1031 | is_declaration = 0; | |
1032 | has_type = 0; | |
1033 | has_specification = 0; | |
1034 | has_pc_info = 0; | |
1035 | may_be_inlined = 0; | |
1036 | main_subprogram = 0; | |
1037 | scope_set = 0; | |
1038 | has_byte_size = 0; | |
1039 | has_const_value = 0; | |
1040 | has_template_arguments = 0; | |
1041 | fixup_called = 0; | |
1042 | is_dwz = 0; | |
1043 | spec_is_dwz = 0; | |
1044 | } | |
c906108c SS |
1045 | }; |
1046 | ||
0963b4bd | 1047 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1048 | struct die_info |
1049 | { | |
76815b17 DE |
1050 | /* DWARF-2 tag for this DIE. */ |
1051 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1052 | ||
1053 | /* Number of attributes */ | |
98bfdba5 PA |
1054 | unsigned char num_attrs; |
1055 | ||
1056 | /* True if we're presently building the full type name for the | |
1057 | type derived from this DIE. */ | |
1058 | unsigned char building_fullname : 1; | |
76815b17 | 1059 | |
adde2bff DE |
1060 | /* True if this die is in process. PR 16581. */ |
1061 | unsigned char in_process : 1; | |
1062 | ||
3e225074 TT |
1063 | /* True if this DIE has children. */ |
1064 | unsigned char has_children : 1; | |
1065 | ||
76815b17 DE |
1066 | /* Abbrev number */ |
1067 | unsigned int abbrev; | |
1068 | ||
93311388 | 1069 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1070 | sect_offset sect_off; |
78ba4af6 JB |
1071 | |
1072 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1073 | points to this die's parent; CHILD points to the first child of | |
1074 | this node; and all the children of a given node are chained | |
4950bc1c | 1075 | together via their SIBLING fields. */ |
639d11d3 DC |
1076 | struct die_info *child; /* Its first child, if any. */ |
1077 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1078 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1079 | |
b60c80d6 DJ |
1080 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1081 | zero, but it's not common and zero-sized arrays are not | |
1082 | sufficiently portable C. */ | |
1083 | struct attribute attrs[1]; | |
c906108c SS |
1084 | }; |
1085 | ||
c906108c SS |
1086 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1087 | but this would require a corresponding change in unpack_field_as_long | |
1088 | and friends. */ | |
1089 | static int bits_per_byte = 8; | |
1090 | ||
2ddeaf8a TT |
1091 | /* When reading a variant or variant part, we track a bit more |
1092 | information about the field, and store it in an object of this | |
1093 | type. */ | |
1094 | ||
1095 | struct variant_field | |
1096 | { | |
1097 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1098 | value. */ | |
1099 | ULONGEST discriminant_value; | |
1100 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1101 | default branch. */ | |
1102 | bool default_branch; | |
1103 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1104 | field is the discriminant. */ | |
1105 | bool is_discriminant; | |
1106 | }; | |
1107 | ||
52059ffd TT |
1108 | struct nextfield |
1109 | { | |
be2daae6 TT |
1110 | int accessibility = 0; |
1111 | int virtuality = 0; | |
2ddeaf8a | 1112 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1113 | struct variant_field variant {}; |
1114 | struct field field {}; | |
52059ffd TT |
1115 | }; |
1116 | ||
1117 | struct fnfieldlist | |
1118 | { | |
be2daae6 TT |
1119 | const char *name = nullptr; |
1120 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1121 | }; |
1122 | ||
c906108c SS |
1123 | /* The routines that read and process dies for a C struct or C++ class |
1124 | pass lists of data member fields and lists of member function fields | |
1125 | in an instance of a field_info structure, as defined below. */ | |
1126 | struct field_info | |
c5aa993b | 1127 | { |
0963b4bd | 1128 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1129 | std::vector<struct nextfield> fields; |
1130 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1131 | |
85102364 | 1132 | /* Set if the accessibility of one of the fields is not public. */ |
be2daae6 | 1133 | int non_public_fields = 0; |
c906108c | 1134 | |
c5aa993b JM |
1135 | /* Member function fieldlist array, contains name of possibly overloaded |
1136 | member function, number of overloaded member functions and a pointer | |
1137 | to the head of the member function field chain. */ | |
be2daae6 | 1138 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1139 | |
1140 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1141 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1142 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1143 | |
1144 | /* Nested types defined by this class and the number of elements in this | |
1145 | list. */ | |
be2daae6 | 1146 | std::vector<struct decl_field> nested_types_list; |
317f7127 TT |
1147 | |
1148 | /* Return the total number of fields (including baseclasses). */ | |
1149 | int nfields () const | |
1150 | { | |
1151 | return fields.size () + baseclasses.size (); | |
1152 | } | |
c5aa993b | 1153 | }; |
c906108c | 1154 | |
ae038cb0 DJ |
1155 | /* Loaded secondary compilation units are kept in memory until they |
1156 | have not been referenced for the processing of this many | |
1157 | compilation units. Set this to zero to disable caching. Cache | |
1158 | sizes of up to at least twenty will improve startup time for | |
1159 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1160 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1161 | static void |
b4f54984 DE |
1162 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1163 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1164 | { |
3e43a32a | 1165 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1166 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1167 | value); |
1168 | } | |
4390d890 | 1169 | \f |
c906108c SS |
1170 | /* local function prototypes */ |
1171 | ||
918dd910 JK |
1172 | static void dwarf2_find_base_address (struct die_info *die, |
1173 | struct dwarf2_cu *cu); | |
1174 | ||
891813be | 1175 | static dwarf2_psymtab *create_partial_symtab |
0018ea6f DE |
1176 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
1177 | ||
f1902523 JK |
1178 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1179 | const gdb_byte *info_ptr, | |
3e225074 | 1180 | struct die_info *type_unit_die); |
f1902523 | 1181 | |
ed2dc618 SM |
1182 | static void dwarf2_build_psymtabs_hard |
1183 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1184 | |
72bf9492 DJ |
1185 | static void scan_partial_symbols (struct partial_die_info *, |
1186 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1187 | int, struct dwarf2_cu *); |
c906108c | 1188 | |
72bf9492 DJ |
1189 | static void add_partial_symbol (struct partial_die_info *, |
1190 | struct dwarf2_cu *); | |
63d06c5c | 1191 | |
72bf9492 DJ |
1192 | static void add_partial_namespace (struct partial_die_info *pdi, |
1193 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1194 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1195 | |
5d7cb8df | 1196 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1197 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1198 | struct dwarf2_cu *cu); |
1199 | ||
72bf9492 DJ |
1200 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1201 | struct dwarf2_cu *cu); | |
91c24f0a | 1202 | |
bc30ff58 JB |
1203 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1204 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1205 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1206 | |
d521ce57 | 1207 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1208 | |
dee91e82 | 1209 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1210 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1211 | |
fb816e8b TV |
1212 | /* A pair of partial_die_info and compilation unit. */ |
1213 | struct cu_partial_die_info | |
1214 | { | |
1215 | /* The compilation unit of the partial_die_info. */ | |
1216 | struct dwarf2_cu *cu; | |
1217 | /* A partial_die_info. */ | |
1218 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1219 | |
1220 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1221 | : cu (cu), | |
1222 | pdi (pdi) | |
405feb71 | 1223 | { /* Nothing. */ } |
122cf0f2 AB |
1224 | |
1225 | private: | |
1226 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1227 | }; |
1228 | ||
122cf0f2 AB |
1229 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1230 | struct dwarf2_cu *); | |
72bf9492 | 1231 | |
d521ce57 TT |
1232 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1233 | struct attribute *, struct attr_abbrev *, | |
18a8505e AT |
1234 | const gdb_byte *, bool *need_reprocess); |
1235 | ||
1236 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
1237 | struct attribute *attr); | |
1238 | ||
1239 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1240 | |
c764a876 | 1241 | static LONGEST read_checked_initial_length_and_offset |
d521ce57 | 1242 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1243 | unsigned int *, unsigned int *); |
613e1657 | 1244 | |
ed2dc618 SM |
1245 | static sect_offset read_abbrev_offset |
1246 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1247 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1248 | |
ed2dc618 SM |
1249 | static const char *read_indirect_string |
1250 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1251 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1252 | |
ed2dc618 SM |
1253 | static const char *read_indirect_line_string |
1254 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1255 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1256 | |
ed2dc618 SM |
1257 | static const char *read_indirect_string_at_offset |
1258 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1259 | LONGEST str_offset); | |
927aa2e7 | 1260 | |
ed2dc618 SM |
1261 | static const char *read_indirect_string_from_dwz |
1262 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1263 | |
d521ce57 TT |
1264 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1265 | const gdb_byte *, | |
3019eac3 DE |
1266 | unsigned int *); |
1267 | ||
18a8505e AT |
1268 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1269 | ULONGEST str_index); | |
1270 | ||
1271 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1272 | ULONGEST str_index); | |
3019eac3 | 1273 | |
e142c38c | 1274 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1275 | |
e142c38c DJ |
1276 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1277 | struct dwarf2_cu *); | |
c906108c | 1278 | |
348e048f | 1279 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1280 | unsigned int); |
348e048f | 1281 | |
7d45c7c3 KB |
1282 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1283 | struct dwarf2_cu *cu); | |
1284 | ||
a084a2a6 AT |
1285 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1286 | ||
05cf31d1 JB |
1287 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1288 | struct dwarf2_cu *cu); | |
1289 | ||
e142c38c | 1290 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1291 | |
e142c38c | 1292 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1293 | struct dwarf2_cu **); |
63d06c5c | 1294 | |
9c541725 | 1295 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1296 | struct dwarf2_cu *cu); |
debd256d | 1297 | |
f3f5162e | 1298 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1299 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1300 | CORE_ADDR, int decode_mapping); |
c906108c | 1301 | |
804d2729 TT |
1302 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1303 | const char *); | |
c906108c | 1304 | |
a14ed312 | 1305 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1306 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1307 | |
ff39bb5e | 1308 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1309 | struct dwarf2_cu *); |
c906108c | 1310 | |
ff39bb5e | 1311 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1312 | struct type *type, |
1313 | const char *name, | |
1314 | struct obstack *obstack, | |
12df843f | 1315 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1316 | const gdb_byte **bytes, |
98bfdba5 | 1317 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1318 | |
e7c27a73 | 1319 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1320 | |
b4ba55a1 JB |
1321 | static int need_gnat_info (struct dwarf2_cu *); |
1322 | ||
3e43a32a MS |
1323 | static struct type *die_descriptive_type (struct die_info *, |
1324 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1325 | |
1326 | static void set_descriptive_type (struct type *, struct die_info *, | |
1327 | struct dwarf2_cu *); | |
1328 | ||
e7c27a73 DJ |
1329 | static struct type *die_containing_type (struct die_info *, |
1330 | struct dwarf2_cu *); | |
c906108c | 1331 | |
ff39bb5e | 1332 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1333 | struct dwarf2_cu *); |
c906108c | 1334 | |
f792889a | 1335 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1336 | |
673bfd45 DE |
1337 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1338 | ||
0d5cff50 | 1339 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1340 | |
6e70227d | 1341 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1342 | const char *suffix, int physname, |
1343 | struct dwarf2_cu *cu); | |
63d06c5c | 1344 | |
e7c27a73 | 1345 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1346 | |
348e048f DE |
1347 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1348 | ||
e7c27a73 | 1349 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1350 | |
e7c27a73 | 1351 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1352 | |
96408a79 SA |
1353 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1354 | ||
71a3c369 TT |
1355 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1356 | ||
ff013f42 | 1357 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
891813be | 1358 | struct dwarf2_cu *, dwarf2_psymtab *); |
ff013f42 | 1359 | |
3a2b436a | 1360 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1361 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1362 | enum pc_bounds_kind |
1363 | { | |
e385593e | 1364 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1365 | PC_BOUNDS_NOT_PRESENT, |
1366 | ||
e385593e JK |
1367 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1368 | were present but they do not form a valid range of PC addresses. */ | |
1369 | PC_BOUNDS_INVALID, | |
1370 | ||
3a2b436a JK |
1371 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1372 | PC_BOUNDS_RANGES, | |
1373 | ||
1374 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1375 | PC_BOUNDS_HIGH_LOW, | |
1376 | }; | |
1377 | ||
1378 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1379 | CORE_ADDR *, CORE_ADDR *, | |
1380 | struct dwarf2_cu *, | |
891813be | 1381 | dwarf2_psymtab *); |
c906108c | 1382 | |
fae299cd DC |
1383 | static void get_scope_pc_bounds (struct die_info *, |
1384 | CORE_ADDR *, CORE_ADDR *, | |
1385 | struct dwarf2_cu *); | |
1386 | ||
801e3a5b JB |
1387 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1388 | CORE_ADDR, struct dwarf2_cu *); | |
1389 | ||
a14ed312 | 1390 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1391 | struct dwarf2_cu *); |
c906108c | 1392 | |
a14ed312 | 1393 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1394 | struct type *, struct dwarf2_cu *); |
c906108c | 1395 | |
a14ed312 | 1396 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1397 | struct die_info *, struct type *, |
e7c27a73 | 1398 | struct dwarf2_cu *); |
c906108c | 1399 | |
a14ed312 | 1400 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1401 | struct type *, |
1402 | struct dwarf2_cu *); | |
c906108c | 1403 | |
134d01f1 | 1404 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1405 | |
e7c27a73 | 1406 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1407 | |
e7c27a73 | 1408 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1409 | |
5d7cb8df JK |
1410 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1411 | ||
804d2729 | 1412 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1413 | |
27aa8d6a SW |
1414 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1415 | ||
74921315 KS |
1416 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1417 | ||
f55ee35c JK |
1418 | static struct type *read_module_type (struct die_info *die, |
1419 | struct dwarf2_cu *cu); | |
1420 | ||
38d518c9 | 1421 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1422 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1423 | |
134d01f1 | 1424 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1425 | |
e7c27a73 | 1426 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1427 | |
6e70227d | 1428 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1429 | struct dwarf2_cu *); |
1430 | ||
bf6af496 | 1431 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1432 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1433 | struct die_info *); |
639d11d3 | 1434 | |
dee91e82 | 1435 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1436 | const gdb_byte *info_ptr, |
1437 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1438 | struct die_info *parent); |
1439 | ||
d521ce57 TT |
1440 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1441 | struct die_info **, const gdb_byte *, | |
3e225074 | 1442 | int); |
3019eac3 | 1443 | |
d521ce57 | 1444 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1445 | struct die_info **, const gdb_byte *); |
93311388 | 1446 | |
e7c27a73 | 1447 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1448 | |
15d034d0 | 1449 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
be1e3d3e | 1450 | struct objfile *); |
71c25dea | 1451 | |
15d034d0 | 1452 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1453 | |
15d034d0 | 1454 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1455 | struct die_info *die, |
1456 | struct dwarf2_cu *cu); | |
1457 | ||
ca69b9e6 DE |
1458 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1459 | struct dwarf2_cu *cu); | |
1460 | ||
e142c38c | 1461 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1462 | struct dwarf2_cu **); |
9219021c | 1463 | |
f39c6ffd | 1464 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1465 | |
f39c6ffd | 1466 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1467 | |
f39c6ffd | 1468 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1469 | |
a121b7c1 | 1470 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1471 | |
f39c6ffd | 1472 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1473 | |
f9aca02d | 1474 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1475 | |
d97bc12b DE |
1476 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1477 | ||
1478 | static void dump_die_for_error (struct die_info *); | |
1479 | ||
1480 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1481 | struct die_info *); | |
c906108c | 1482 | |
d97bc12b | 1483 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1484 | |
51545339 | 1485 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1486 | struct dwarf2_cu *); |
c906108c | 1487 | |
ff39bb5e | 1488 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1489 | |
ff39bb5e | 1490 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1491 | |
348e048f | 1492 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1493 | const struct attribute *, |
348e048f DE |
1494 | struct dwarf2_cu **); |
1495 | ||
10b3939b | 1496 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1497 | const struct attribute *, |
f2f0e013 | 1498 | struct dwarf2_cu **); |
c906108c | 1499 | |
348e048f | 1500 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1501 | const struct attribute *, |
348e048f DE |
1502 | struct dwarf2_cu **); |
1503 | ||
ac9ec31b DE |
1504 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1505 | struct dwarf2_cu *); | |
1506 | ||
1507 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1508 | const struct attribute *, |
ac9ec31b DE |
1509 | struct dwarf2_cu *); |
1510 | ||
e5fe5e75 | 1511 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1512 | |
52dc124a | 1513 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1514 | |
63e43d3a PMR |
1515 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1516 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1517 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1518 | |
c906108c SS |
1519 | /* memory allocation interface */ |
1520 | ||
7b5a2f43 | 1521 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1522 | |
b60c80d6 | 1523 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1524 | |
43f3e411 | 1525 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1526 | |
8cf6f0b1 TT |
1527 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1528 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1529 | const struct attribute *attr); |
8cf6f0b1 | 1530 | |
ff39bb5e | 1531 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1532 | struct symbol *sym, |
f1e6e072 TT |
1533 | struct dwarf2_cu *cu, |
1534 | int is_block); | |
4c2df51b | 1535 | |
d521ce57 TT |
1536 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1537 | const gdb_byte *info_ptr, | |
1538 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1539 | |
72bf9492 DJ |
1540 | static hashval_t partial_die_hash (const void *item); |
1541 | ||
1542 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1543 | ||
ae038cb0 | 1544 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1545 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1546 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1547 | |
9816fde3 | 1548 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1549 | struct die_info *comp_unit_die, |
1550 | enum language pretend_language); | |
93311388 | 1551 | |
ed2dc618 | 1552 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1553 | |
dee91e82 | 1554 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1555 | |
f792889a DJ |
1556 | static struct type *set_die_type (struct die_info *, struct type *, |
1557 | struct dwarf2_cu *); | |
1c379e20 | 1558 | |
ed2dc618 | 1559 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1560 | |
ed2dc618 | 1561 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1562 | |
58f0c718 | 1563 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1564 | enum language); |
10b3939b | 1565 | |
95554aad TT |
1566 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1567 | enum language); | |
10b3939b | 1568 | |
f4dc4d17 DE |
1569 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1570 | enum language); | |
1571 | ||
10b3939b DJ |
1572 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1573 | struct dwarf2_per_cu_data *); | |
1574 | ||
ae038cb0 DJ |
1575 | static void dwarf2_mark (struct dwarf2_cu *); |
1576 | ||
1577 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1578 | ||
b64f50a1 | 1579 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1580 | struct dwarf2_per_cu_data *); |
673bfd45 | 1581 | |
f792889a | 1582 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1583 | |
95554aad TT |
1584 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1585 | enum language pretend_language); | |
1586 | ||
ed2dc618 | 1587 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1588 | |
b303c6f6 AB |
1589 | /* Class, the destructor of which frees all allocated queue entries. This |
1590 | will only have work to do if an error was thrown while processing the | |
1591 | dwarf. If no error was thrown then the queue entries should have all | |
1592 | been processed, and freed, as we went along. */ | |
1593 | ||
1594 | class dwarf2_queue_guard | |
1595 | { | |
1596 | public: | |
39856def TT |
1597 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
1598 | : m_per_objfile (per_objfile) | |
1599 | { | |
1600 | } | |
b303c6f6 AB |
1601 | |
1602 | /* Free any entries remaining on the queue. There should only be | |
1603 | entries left if we hit an error while processing the dwarf. */ | |
1604 | ~dwarf2_queue_guard () | |
1605 | { | |
39856def TT |
1606 | /* Ensure that no memory is allocated by the queue. */ |
1607 | std::queue<dwarf2_queue_item> empty; | |
1608 | std::swap (m_per_objfile->queue, empty); | |
1609 | } | |
b303c6f6 | 1610 | |
39856def | 1611 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
b303c6f6 | 1612 | |
39856def TT |
1613 | private: |
1614 | dwarf2_per_objfile *m_per_objfile; | |
b303c6f6 AB |
1615 | }; |
1616 | ||
39856def TT |
1617 | dwarf2_queue_item::~dwarf2_queue_item () |
1618 | { | |
1619 | /* Anything still marked queued is likely to be in an | |
1620 | inconsistent state, so discard it. */ | |
1621 | if (per_cu->queued) | |
1622 | { | |
1623 | if (per_cu->cu != NULL) | |
1624 | free_one_cached_comp_unit (per_cu); | |
1625 | per_cu->queued = 0; | |
1626 | } | |
1627 | } | |
1628 | ||
d721ba37 PA |
1629 | /* The return type of find_file_and_directory. Note, the enclosed |
1630 | string pointers are only valid while this object is valid. */ | |
1631 | ||
1632 | struct file_and_directory | |
1633 | { | |
1634 | /* The filename. This is never NULL. */ | |
1635 | const char *name; | |
1636 | ||
1637 | /* The compilation directory. NULL if not known. If we needed to | |
1638 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1639 | points directly to the DW_AT_comp_dir string attribute owned by | |
1640 | the obstack that owns the DIE. */ | |
1641 | const char *comp_dir; | |
1642 | ||
1643 | /* If we needed to build a new string for comp_dir, this is what | |
1644 | owns the storage. */ | |
1645 | std::string comp_dir_storage; | |
1646 | }; | |
1647 | ||
1648 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1649 | struct dwarf2_cu *cu); | |
9291a0cd | 1650 | |
298e9637 | 1651 | static htab_up allocate_signatured_type_table (); |
1fd400ff | 1652 | |
298e9637 | 1653 | static htab_up allocate_dwo_unit_table (); |
3019eac3 | 1654 | |
57d63ce2 | 1655 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1656 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1657 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1658 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1659 | |
ed2dc618 SM |
1660 | static struct dwp_file *get_dwp_file |
1661 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1662 | |
3019eac3 | 1663 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1664 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1665 | |
1666 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1667 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1668 | |
89e63ee4 DE |
1669 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1670 | ||
263db9a1 TT |
1671 | /* A unique pointer to a dwo_file. */ |
1672 | ||
51ac9db5 | 1673 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 1674 | |
ed2dc618 | 1675 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 1676 | |
1b80a9fa | 1677 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1678 | |
1679 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1680 | \f |
1681 | /* Various complaints about symbol reading that don't abort the process. */ | |
1682 | ||
1683 | static void | |
1684 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1685 | { | |
b98664d3 | 1686 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
1687 | } |
1688 | ||
1689 | static void | |
1690 | dwarf2_debug_line_missing_file_complaint (void) | |
1691 | { | |
b98664d3 | 1692 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1693 | } |
1694 | ||
1695 | static void | |
1696 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1697 | { | |
b98664d3 | 1698 | complaint (_(".debug_line section has line " |
4390d890 DE |
1699 | "program sequence without an end")); |
1700 | } | |
1701 | ||
1702 | static void | |
1703 | dwarf2_complex_location_expr_complaint (void) | |
1704 | { | |
b98664d3 | 1705 | complaint (_("location expression too complex")); |
4390d890 DE |
1706 | } |
1707 | ||
1708 | static void | |
1709 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1710 | int arg3) | |
1711 | { | |
b98664d3 | 1712 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1713 | arg1, arg2, arg3); |
1714 | } | |
1715 | ||
1716 | static void | |
1717 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1718 | { | |
b98664d3 | 1719 | complaint (_("debug info runs off end of %s section" |
4390d890 | 1720 | " [in module %s]"), |
96b79293 TT |
1721 | section->get_name (), |
1722 | section->get_file_name ()); | |
4390d890 | 1723 | } |
1b80a9fa | 1724 | |
4390d890 DE |
1725 | static void |
1726 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1727 | { | |
b98664d3 | 1728 | complaint (_("macro debug info contains a " |
4390d890 DE |
1729 | "malformed macro definition:\n`%s'"), |
1730 | arg1); | |
1731 | } | |
1732 | ||
1733 | static void | |
1734 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1735 | { | |
b98664d3 | 1736 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1737 | arg1, arg2); |
1738 | } | |
527f3840 JK |
1739 | |
1740 | /* Hash function for line_header_hash. */ | |
1741 | ||
1742 | static hashval_t | |
1743 | line_header_hash (const struct line_header *ofs) | |
1744 | { | |
9c541725 | 1745 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1746 | } |
1747 | ||
1748 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1749 | ||
1750 | static hashval_t | |
1751 | line_header_hash_voidp (const void *item) | |
1752 | { | |
9a3c8263 | 1753 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1754 | |
1755 | return line_header_hash (ofs); | |
1756 | } | |
1757 | ||
1758 | /* Equality function for line_header_hash. */ | |
1759 | ||
1760 | static int | |
1761 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1762 | { | |
9a3c8263 SM |
1763 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1764 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1765 | |
9c541725 | 1766 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1767 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1768 | } | |
1769 | ||
4390d890 | 1770 | \f |
9291a0cd | 1771 | |
330cdd98 PA |
1772 | /* See declaration. */ |
1773 | ||
1774 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
1775 | const dwarf2_debug_sections *names, |
1776 | bool can_copy_) | |
1777 | : objfile (objfile_), | |
1778 | can_copy (can_copy_) | |
330cdd98 PA |
1779 | { |
1780 | if (names == NULL) | |
1781 | names = &dwarf2_elf_names; | |
1782 | ||
1783 | bfd *obfd = objfile->obfd; | |
1784 | ||
1785 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
1786 | locate_sections (obfd, sec, *names); | |
1787 | } | |
1788 | ||
1789 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
1790 | { | |
1791 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
1792 | free_cached_comp_units (); | |
1793 | ||
b76e467d | 1794 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
ae640021 | 1795 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1796 | |
b2bdb8cf | 1797 | for (signatured_type *sig_type : all_type_units) |
ae640021 | 1798 | sig_type->per_cu.imported_symtabs_free (); |
fc8e7e75 | 1799 | |
330cdd98 PA |
1800 | /* Everything else should be on the objfile obstack. */ |
1801 | } | |
1802 | ||
1803 | /* See declaration. */ | |
1804 | ||
1805 | void | |
1806 | dwarf2_per_objfile::free_cached_comp_units () | |
1807 | { | |
1808 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
1809 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
1810 | while (per_cu != NULL) | |
1811 | { | |
1812 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
1813 | ||
fcd3b13d | 1814 | delete per_cu->cu; |
330cdd98 PA |
1815 | *last_chain = next_cu; |
1816 | per_cu = next_cu; | |
1817 | } | |
1818 | } | |
1819 | ||
11ed8cad TT |
1820 | /* A helper class that calls free_cached_comp_units on |
1821 | destruction. */ | |
1822 | ||
1823 | class free_cached_comp_units | |
1824 | { | |
1825 | public: | |
1826 | ||
1827 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1828 | : m_per_objfile (per_objfile) | |
1829 | { | |
1830 | } | |
1831 | ||
1832 | ~free_cached_comp_units () | |
1833 | { | |
1834 | m_per_objfile->free_cached_comp_units (); | |
1835 | } | |
1836 | ||
1837 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1838 | ||
1839 | private: | |
1840 | ||
1841 | dwarf2_per_objfile *m_per_objfile; | |
1842 | }; | |
1843 | ||
c906108c | 1844 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1845 | information and return true if we have enough to do something. |
1846 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1847 | ELF names are used. CAN_COPY is true for formats where symbol |
1848 | interposition is possible and so symbol values must follow copy | |
1849 | relocation rules. */ | |
c906108c SS |
1850 | |
1851 | int | |
251d32d9 | 1852 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
1853 | const struct dwarf2_debug_sections *names, |
1854 | bool can_copy) | |
c906108c | 1855 | { |
97cbe998 SDJ |
1856 | if (objfile->flags & OBJF_READNEVER) |
1857 | return 0; | |
1858 | ||
ed2dc618 SM |
1859 | struct dwarf2_per_objfile *dwarf2_per_objfile |
1860 | = get_dwarf2_per_objfile (objfile); | |
1861 | ||
1862 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 1863 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
1864 | names, |
1865 | can_copy); | |
5bfd760d | 1866 | |
73869dc2 | 1867 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 1868 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 1869 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 1870 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
1871 | } |
1872 | ||
251d32d9 TG |
1873 | /* When loading sections, we look either for uncompressed section or for |
1874 | compressed section names. */ | |
233a11ab CS |
1875 | |
1876 | static int | |
251d32d9 TG |
1877 | section_is_p (const char *section_name, |
1878 | const struct dwarf2_section_names *names) | |
233a11ab | 1879 | { |
251d32d9 TG |
1880 | if (names->normal != NULL |
1881 | && strcmp (section_name, names->normal) == 0) | |
1882 | return 1; | |
1883 | if (names->compressed != NULL | |
1884 | && strcmp (section_name, names->compressed) == 0) | |
1885 | return 1; | |
1886 | return 0; | |
233a11ab CS |
1887 | } |
1888 | ||
330cdd98 | 1889 | /* See declaration. */ |
c906108c | 1890 | |
330cdd98 PA |
1891 | void |
1892 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
1893 | const dwarf2_debug_sections &names) | |
c906108c | 1894 | { |
fd361982 | 1895 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1896 | |
dc7650b8 JK |
1897 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1898 | { | |
1899 | } | |
950b7495 KS |
1900 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1901 | > bfd_get_file_size (abfd)) | |
1902 | { | |
1903 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1904 | warning (_("Discarding section %s which has a section size (%s" | |
1905 | ") larger than the file size [in module %s]"), | |
1906 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1907 | bfd_get_filename (abfd)); | |
1908 | } | |
330cdd98 | 1909 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 1910 | { |
330cdd98 | 1911 | this->info.s.section = sectp; |
fd361982 | 1912 | this->info.size = bfd_section_size (sectp); |
c906108c | 1913 | } |
330cdd98 | 1914 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 1915 | { |
330cdd98 | 1916 | this->abbrev.s.section = sectp; |
fd361982 | 1917 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1918 | } |
330cdd98 | 1919 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 1920 | { |
330cdd98 | 1921 | this->line.s.section = sectp; |
fd361982 | 1922 | this->line.size = bfd_section_size (sectp); |
c906108c | 1923 | } |
330cdd98 | 1924 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 1925 | { |
330cdd98 | 1926 | this->loc.s.section = sectp; |
fd361982 | 1927 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1928 | } |
330cdd98 | 1929 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 1930 | { |
330cdd98 | 1931 | this->loclists.s.section = sectp; |
fd361982 | 1932 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1933 | } |
330cdd98 | 1934 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 1935 | { |
330cdd98 | 1936 | this->macinfo.s.section = sectp; |
fd361982 | 1937 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1938 | } |
330cdd98 | 1939 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 1940 | { |
330cdd98 | 1941 | this->macro.s.section = sectp; |
fd361982 | 1942 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1943 | } |
330cdd98 | 1944 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 1945 | { |
330cdd98 | 1946 | this->str.s.section = sectp; |
fd361982 | 1947 | this->str.size = bfd_section_size (sectp); |
c906108c | 1948 | } |
18a8505e AT |
1949 | else if (section_is_p (sectp->name, &names.str_offsets)) |
1950 | { | |
1951 | this->str_offsets.s.section = sectp; | |
1952 | this->str_offsets.size = bfd_section_size (sectp); | |
1953 | } | |
330cdd98 | 1954 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 1955 | { |
330cdd98 | 1956 | this->line_str.s.section = sectp; |
fd361982 | 1957 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1958 | } |
330cdd98 | 1959 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 1960 | { |
330cdd98 | 1961 | this->addr.s.section = sectp; |
fd361982 | 1962 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1963 | } |
330cdd98 | 1964 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 1965 | { |
330cdd98 | 1966 | this->frame.s.section = sectp; |
fd361982 | 1967 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1968 | } |
330cdd98 | 1969 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 1970 | { |
330cdd98 | 1971 | this->eh_frame.s.section = sectp; |
fd361982 | 1972 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1973 | } |
330cdd98 | 1974 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 1975 | { |
330cdd98 | 1976 | this->ranges.s.section = sectp; |
fd361982 | 1977 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1978 | } |
330cdd98 | 1979 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 1980 | { |
330cdd98 | 1981 | this->rnglists.s.section = sectp; |
fd361982 | 1982 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1983 | } |
330cdd98 | 1984 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 1985 | { |
8b70b953 TT |
1986 | struct dwarf2_section_info type_section; |
1987 | ||
1988 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1989 | type_section.s.section = sectp; |
fd361982 | 1990 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1991 | |
fd5866f6 | 1992 | this->types.push_back (type_section); |
348e048f | 1993 | } |
330cdd98 | 1994 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 1995 | { |
330cdd98 | 1996 | this->gdb_index.s.section = sectp; |
fd361982 | 1997 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1998 | } |
927aa2e7 JK |
1999 | else if (section_is_p (sectp->name, &names.debug_names)) |
2000 | { | |
2001 | this->debug_names.s.section = sectp; | |
fd361982 | 2002 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
2003 | } |
2004 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2005 | { | |
2006 | this->debug_aranges.s.section = sectp; | |
fd361982 | 2007 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 2008 | } |
dce234bc | 2009 | |
fd361982 AM |
2010 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
2011 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 2012 | this->has_section_at_zero = true; |
c906108c SS |
2013 | } |
2014 | ||
dce234bc | 2015 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2016 | SECTION_NAME. */ |
af34e669 | 2017 | |
dce234bc | 2018 | void |
3017a003 TG |
2019 | dwarf2_get_section_info (struct objfile *objfile, |
2020 | enum dwarf2_section_enum sect, | |
d521ce57 | 2021 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2022 | bfd_size_type *sizep) |
2023 | { | |
5bfd760d | 2024 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2025 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2026 | |
2027 | /* We may see an objfile without any DWARF, in which case we just | |
2028 | return nothing. */ | |
2029 | if (data == NULL) | |
2030 | { | |
2031 | *sectp = NULL; | |
2032 | *bufp = NULL; | |
2033 | *sizep = 0; | |
2034 | return; | |
2035 | } | |
3017a003 TG |
2036 | switch (sect) |
2037 | { | |
2038 | case DWARF2_DEBUG_FRAME: | |
2039 | info = &data->frame; | |
2040 | break; | |
2041 | case DWARF2_EH_FRAME: | |
2042 | info = &data->eh_frame; | |
2043 | break; | |
2044 | default: | |
2045 | gdb_assert_not_reached ("unexpected section"); | |
2046 | } | |
dce234bc | 2047 | |
96b79293 | 2048 | info->read (objfile); |
dce234bc | 2049 | |
96b79293 | 2050 | *sectp = info->get_bfd_section (); |
dce234bc PP |
2051 | *bufp = info->buffer; |
2052 | *sizep = info->size; | |
2053 | } | |
2054 | ||
36586728 TT |
2055 | /* A helper function to find the sections for a .dwz file. */ |
2056 | ||
2057 | static void | |
2058 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2059 | { | |
9a3c8263 | 2060 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2061 | |
2062 | /* Note that we only support the standard ELF names, because .dwz | |
2063 | is ELF-only (at the time of writing). */ | |
2064 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2065 | { | |
049412e3 | 2066 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2067 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2068 | } |
2069 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2070 | { | |
049412e3 | 2071 | dwz_file->info.s.section = sectp; |
fd361982 | 2072 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2073 | } |
2074 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2075 | { | |
049412e3 | 2076 | dwz_file->str.s.section = sectp; |
fd361982 | 2077 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2078 | } |
2079 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2080 | { | |
049412e3 | 2081 | dwz_file->line.s.section = sectp; |
fd361982 | 2082 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2083 | } |
2084 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2085 | { | |
049412e3 | 2086 | dwz_file->macro.s.section = sectp; |
fd361982 | 2087 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2088 | } |
2ec9a5e0 TT |
2089 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2090 | { | |
049412e3 | 2091 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2092 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2093 | } |
927aa2e7 JK |
2094 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2095 | { | |
2096 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2097 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2098 | } |
36586728 TT |
2099 | } |
2100 | ||
c4973306 | 2101 | /* See dwarf2read.h. */ |
36586728 | 2102 | |
c4973306 | 2103 | struct dwz_file * |
ed2dc618 | 2104 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2105 | { |
36586728 | 2106 | const char *filename; |
acd13123 | 2107 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2108 | size_t buildid_len; |
2109 | bfd_byte *buildid; | |
36586728 TT |
2110 | |
2111 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2112 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2113 | |
4db1a1dc | 2114 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2115 | gdb::unique_xmalloc_ptr<char> data |
2116 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2117 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2118 | if (data == NULL) |
2119 | { | |
2120 | if (bfd_get_error () == bfd_error_no_error) | |
2121 | return NULL; | |
2122 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2123 | bfd_errmsg (bfd_get_error ())); | |
2124 | } | |
791afaa2 TT |
2125 | |
2126 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2127 | |
acd13123 TT |
2128 | buildid_len = (size_t) buildid_len_arg; |
2129 | ||
791afaa2 | 2130 | filename = data.get (); |
d721ba37 PA |
2131 | |
2132 | std::string abs_storage; | |
36586728 TT |
2133 | if (!IS_ABSOLUTE_PATH (filename)) |
2134 | { | |
14278e1f TT |
2135 | gdb::unique_xmalloc_ptr<char> abs |
2136 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2137 | |
14278e1f | 2138 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2139 | filename = abs_storage.c_str (); |
36586728 TT |
2140 | } |
2141 | ||
dc294be5 TT |
2142 | /* First try the file name given in the section. If that doesn't |
2143 | work, try to use the build-id instead. */ | |
192b62ce | 2144 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2145 | if (dwz_bfd != NULL) |
36586728 | 2146 | { |
192b62ce | 2147 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2148 | dwz_bfd.reset (nullptr); |
36586728 TT |
2149 | } |
2150 | ||
dc294be5 TT |
2151 | if (dwz_bfd == NULL) |
2152 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2153 | ||
0d79cdc4 AM |
2154 | if (dwz_bfd == nullptr) |
2155 | { | |
2156 | gdb::unique_xmalloc_ptr<char> alt_filename; | |
2157 | const char *origname = dwarf2_per_objfile->objfile->original_name; | |
2158 | ||
2159 | scoped_fd fd (debuginfod_debuginfo_query (buildid, | |
2160 | buildid_len, | |
2161 | origname, | |
2162 | &alt_filename)); | |
2163 | ||
2164 | if (fd.get () >= 0) | |
2165 | { | |
2166 | /* File successfully retrieved from server. */ | |
2167 | dwz_bfd = gdb_bfd_open (alt_filename.get (), gnutarget, -1); | |
2168 | ||
2169 | if (dwz_bfd == nullptr) | |
2170 | warning (_("File \"%s\" from debuginfod cannot be opened as bfd"), | |
2171 | alt_filename.get ()); | |
2172 | else if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) | |
2173 | dwz_bfd.reset (nullptr); | |
2174 | } | |
2175 | } | |
2176 | ||
dc294be5 TT |
2177 | if (dwz_bfd == NULL) |
2178 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2179 | objfile_name (dwarf2_per_objfile->objfile)); | |
2180 | ||
7ff8cb8c TT |
2181 | std::unique_ptr<struct dwz_file> result |
2182 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2183 | |
7ff8cb8c TT |
2184 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2185 | result.get ()); | |
36586728 | 2186 | |
7ff8cb8c TT |
2187 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2188 | result->dwz_bfd.get ()); | |
2189 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2190 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2191 | } |
9291a0cd | 2192 | \f |
7b9f3c50 DE |
2193 | /* DWARF quick_symbols_functions support. */ |
2194 | ||
2195 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2196 | unique line tables, so we maintain a separate table of all .debug_line | |
2197 | derived entries to support the sharing. | |
2198 | All the quick functions need is the list of file names. We discard the | |
2199 | line_header when we're done and don't need to record it here. */ | |
2200 | struct quick_file_names | |
2201 | { | |
094b34ac DE |
2202 | /* The data used to construct the hash key. */ |
2203 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2204 | |
2205 | /* The number of entries in file_names, real_names. */ | |
2206 | unsigned int num_file_names; | |
2207 | ||
2208 | /* The file names from the line table, after being run through | |
2209 | file_full_name. */ | |
2210 | const char **file_names; | |
2211 | ||
2212 | /* The file names from the line table after being run through | |
2213 | gdb_realpath. These are computed lazily. */ | |
2214 | const char **real_names; | |
2215 | }; | |
2216 | ||
2217 | /* When using the index (and thus not using psymtabs), each CU has an | |
2218 | object of this type. This is used to hold information needed by | |
2219 | the various "quick" methods. */ | |
2220 | struct dwarf2_per_cu_quick_data | |
2221 | { | |
2222 | /* The file table. This can be NULL if there was no file table | |
2223 | or it's currently not read in. | |
2224 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2225 | struct quick_file_names *file_names; | |
2226 | ||
2227 | /* The corresponding symbol table. This is NULL if symbols for this | |
2228 | CU have not yet been read. */ | |
43f3e411 | 2229 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2230 | |
2231 | /* A temporary mark bit used when iterating over all CUs in | |
2232 | expand_symtabs_matching. */ | |
2233 | unsigned int mark : 1; | |
2234 | ||
2235 | /* True if we've tried to read the file table and found there isn't one. | |
2236 | There will be no point in trying to read it again next time. */ | |
2237 | unsigned int no_file_data : 1; | |
2238 | }; | |
2239 | ||
094b34ac DE |
2240 | /* Utility hash function for a stmt_list_hash. */ |
2241 | ||
2242 | static hashval_t | |
2243 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2244 | { | |
2245 | hashval_t v = 0; | |
2246 | ||
2247 | if (stmt_list_hash->dwo_unit != NULL) | |
2248 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2249 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2250 | return v; |
2251 | } | |
2252 | ||
2253 | /* Utility equality function for a stmt_list_hash. */ | |
2254 | ||
2255 | static int | |
2256 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2257 | const struct stmt_list_hash *rhs) | |
2258 | { | |
2259 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2260 | return 0; | |
2261 | if (lhs->dwo_unit != NULL | |
2262 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2263 | return 0; | |
2264 | ||
9c541725 | 2265 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2266 | } |
2267 | ||
7b9f3c50 DE |
2268 | /* Hash function for a quick_file_names. */ |
2269 | ||
2270 | static hashval_t | |
2271 | hash_file_name_entry (const void *e) | |
2272 | { | |
9a3c8263 SM |
2273 | const struct quick_file_names *file_data |
2274 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2275 | |
094b34ac | 2276 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2277 | } |
2278 | ||
2279 | /* Equality function for a quick_file_names. */ | |
2280 | ||
2281 | static int | |
2282 | eq_file_name_entry (const void *a, const void *b) | |
2283 | { | |
9a3c8263 SM |
2284 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2285 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2286 | |
094b34ac | 2287 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2288 | } |
2289 | ||
2290 | /* Delete function for a quick_file_names. */ | |
2291 | ||
2292 | static void | |
2293 | delete_file_name_entry (void *e) | |
2294 | { | |
9a3c8263 | 2295 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2296 | int i; |
2297 | ||
2298 | for (i = 0; i < file_data->num_file_names; ++i) | |
2299 | { | |
2300 | xfree ((void*) file_data->file_names[i]); | |
2301 | if (file_data->real_names) | |
2302 | xfree ((void*) file_data->real_names[i]); | |
2303 | } | |
2304 | ||
2305 | /* The space for the struct itself lives on objfile_obstack, | |
2306 | so we don't free it here. */ | |
2307 | } | |
2308 | ||
2309 | /* Create a quick_file_names hash table. */ | |
2310 | ||
5895093f | 2311 | static htab_up |
7b9f3c50 DE |
2312 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2313 | { | |
5895093f TT |
2314 | return htab_up (htab_create_alloc (nr_initial_entries, |
2315 | hash_file_name_entry, eq_file_name_entry, | |
2316 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2317 | } |
9291a0cd | 2318 | |
918dd910 JK |
2319 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2320 | have to be created afterwards. You should call age_cached_comp_units after | |
2321 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2322 | ||
2323 | static void | |
58f0c718 | 2324 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2325 | { |
3019eac3 | 2326 | if (per_cu->is_debug_types) |
e5fe5e75 | 2327 | load_full_type_unit (per_cu); |
918dd910 | 2328 | else |
58f0c718 | 2329 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2330 | |
cc12ce38 DE |
2331 | if (per_cu->cu == NULL) |
2332 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2333 | |
2334 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2335 | } |
2336 | ||
a0f42c21 | 2337 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2338 | |
9291a0cd | 2339 | static void |
58f0c718 | 2340 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2341 | { |
ed2dc618 | 2342 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2343 | |
f4dc4d17 DE |
2344 | /* Skip type_unit_groups, reading the type units they contain |
2345 | is handled elsewhere. */ | |
197400e8 | 2346 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2347 | return; |
2348 | ||
b303c6f6 AB |
2349 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2350 | the queue. After this point we're guaranteed to leave this function | |
2351 | with the dwarf queue empty. */ | |
39856def | 2352 | dwarf2_queue_guard q_guard (dwarf2_per_objfile); |
9291a0cd | 2353 | |
95554aad | 2354 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2355 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2356 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2357 | { | |
2358 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2359 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2360 | |
2361 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2362 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2363 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2364 | if (!per_cu->is_debug_types | |
cc12ce38 | 2365 | && per_cu->cu != NULL |
89e63ee4 DE |
2366 | && per_cu->cu->dwo_unit != NULL |
2367 | && dwarf2_per_objfile->index_table != NULL | |
2368 | && dwarf2_per_objfile->index_table->version <= 7 | |
2369 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2370 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2371 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2372 | } |
9291a0cd | 2373 | |
ed2dc618 | 2374 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2375 | |
2376 | /* Age the cache, releasing compilation units that have not | |
2377 | been used recently. */ | |
ed2dc618 | 2378 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2379 | } |
2380 | ||
2381 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2382 | the objfile from which this CU came. Returns the resulting symbol | |
2383 | table. */ | |
2fdf6df6 | 2384 | |
43f3e411 | 2385 | static struct compunit_symtab * |
58f0c718 | 2386 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2387 | { |
ed2dc618 SM |
2388 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2389 | ||
95554aad | 2390 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2391 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2392 | { |
11ed8cad | 2393 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2394 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2395 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2396 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2397 | } |
f194fefb | 2398 | |
43f3e411 | 2399 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2400 | } |
2401 | ||
ff4c9fec | 2402 | /* See declaration. */ |
f4dc4d17 | 2403 | |
ff4c9fec SM |
2404 | dwarf2_per_cu_data * |
2405 | dwarf2_per_objfile::get_cutu (int index) | |
2406 | { | |
b76e467d | 2407 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2408 | { |
b76e467d | 2409 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2410 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2411 | return &this->all_type_units[index]->per_cu; |
2412 | } | |
f4dc4d17 | 2413 | |
ff4c9fec SM |
2414 | return this->all_comp_units[index]; |
2415 | } | |
f4dc4d17 | 2416 | |
ff4c9fec | 2417 | /* See declaration. */ |
2fdf6df6 | 2418 | |
ff4c9fec SM |
2419 | dwarf2_per_cu_data * |
2420 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2421 | { |
b76e467d | 2422 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2423 | |
ff4c9fec | 2424 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2425 | } |
2426 | ||
ff4c9fec | 2427 | /* See declaration. */ |
f4dc4d17 | 2428 | |
ff4c9fec SM |
2429 | signatured_type * |
2430 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2431 | { |
b2bdb8cf | 2432 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2433 | |
ff4c9fec | 2434 | return this->all_type_units[index]; |
1fd400ff TT |
2435 | } |
2436 | ||
4b514bc8 JK |
2437 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2438 | objfile_obstack, and constructed with the specified field | |
2439 | values. */ | |
2440 | ||
2441 | static dwarf2_per_cu_data * | |
ed2dc618 | 2442 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2443 | struct dwarf2_section_info *section, |
2444 | int is_dwz, | |
2445 | sect_offset sect_off, ULONGEST length) | |
2446 | { | |
ed2dc618 | 2447 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2448 | dwarf2_per_cu_data *the_cu |
2449 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2450 | struct dwarf2_per_cu_data); | |
2451 | the_cu->sect_off = sect_off; | |
2452 | the_cu->length = length; | |
e3b94546 | 2453 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2454 | the_cu->section = section; |
2455 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2456 | struct dwarf2_per_cu_quick_data); | |
2457 | the_cu->is_dwz = is_dwz; | |
2458 | return the_cu; | |
2459 | } | |
2460 | ||
2ec9a5e0 TT |
2461 | /* A helper for create_cus_from_index that handles a given list of |
2462 | CUs. */ | |
2fdf6df6 | 2463 | |
74a0d9f6 | 2464 | static void |
12359b5e | 2465 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2466 | const gdb_byte *cu_list, offset_type n_elements, |
2467 | struct dwarf2_section_info *section, | |
b76e467d | 2468 | int is_dwz) |
9291a0cd | 2469 | { |
12359b5e | 2470 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2471 | { |
74a0d9f6 | 2472 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2473 | |
2474 | sect_offset sect_off | |
2475 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2476 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2477 | cu_list += 2 * 8; |
2478 | ||
b76e467d | 2479 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2480 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2481 | sect_off, length); | |
b76e467d | 2482 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2483 | } |
9291a0cd TT |
2484 | } |
2485 | ||
2ec9a5e0 | 2486 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2487 | the CU objects for this objfile. */ |
2ec9a5e0 | 2488 | |
74a0d9f6 | 2489 | static void |
12359b5e | 2490 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2491 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2492 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2493 | { | |
b76e467d SM |
2494 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
2495 | dwarf2_per_objfile->all_comp_units.reserve | |
2496 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2497 | |
12359b5e | 2498 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 2499 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
2500 | |
2501 | if (dwz_elements == 0) | |
74a0d9f6 | 2502 | return; |
2ec9a5e0 | 2503 | |
12359b5e SM |
2504 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
2505 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 2506 | &dwz->info, 1); |
2ec9a5e0 TT |
2507 | } |
2508 | ||
1fd400ff | 2509 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2510 | |
74a0d9f6 | 2511 | static void |
12359b5e SM |
2512 | create_signatured_type_table_from_index |
2513 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
2514 | struct dwarf2_section_info *section, | |
2515 | const gdb_byte *bytes, | |
2516 | offset_type elements) | |
1fd400ff | 2517 | { |
12359b5e | 2518 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 2519 | |
b2bdb8cf SM |
2520 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2521 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 2522 | |
298e9637 | 2523 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2524 | |
12359b5e | 2525 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2526 | { |
52dc124a | 2527 | struct signatured_type *sig_type; |
9c541725 | 2528 | ULONGEST signature; |
1fd400ff | 2529 | void **slot; |
9c541725 | 2530 | cu_offset type_offset_in_tu; |
1fd400ff | 2531 | |
74a0d9f6 | 2532 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2533 | sect_offset sect_off |
2534 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2535 | type_offset_in_tu | |
2536 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2537 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2538 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2539 | bytes += 3 * 8; | |
2540 | ||
52dc124a | 2541 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2542 | struct signatured_type); |
52dc124a | 2543 | sig_type->signature = signature; |
9c541725 | 2544 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 2545 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 2546 | sig_type->per_cu.section = section; |
9c541725 | 2547 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 2548 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 2549 | sig_type->per_cu.v.quick |
1fd400ff TT |
2550 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2551 | struct dwarf2_per_cu_quick_data); | |
2552 | ||
b0b6a987 | 2553 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
52dc124a | 2554 | *slot = sig_type; |
1fd400ff | 2555 | |
b2bdb8cf | 2556 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
2557 | } |
2558 | ||
b0b6a987 | 2559 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2560 | } |
2561 | ||
927aa2e7 JK |
2562 | /* Create the signatured type hash table from .debug_names. */ |
2563 | ||
2564 | static void | |
2565 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 2566 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2567 | const mapped_debug_names &map, |
2568 | struct dwarf2_section_info *section, | |
2569 | struct dwarf2_section_info *abbrev_section) | |
2570 | { | |
ed2dc618 SM |
2571 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2572 | ||
96b79293 TT |
2573 | section->read (objfile); |
2574 | abbrev_section->read (objfile); | |
927aa2e7 | 2575 | |
b2bdb8cf SM |
2576 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2577 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 | 2578 | |
298e9637 | 2579 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2580 | |
2581 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2582 | { | |
2583 | struct signatured_type *sig_type; | |
927aa2e7 | 2584 | void **slot; |
927aa2e7 JK |
2585 | |
2586 | sect_offset sect_off | |
2587 | = (sect_offset) (extract_unsigned_integer | |
2588 | (map.tu_table_reordered + i * map.offset_size, | |
2589 | map.offset_size, | |
2590 | map.dwarf5_byte_order)); | |
2591 | ||
2592 | comp_unit_head cu_header; | |
ed2dc618 SM |
2593 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
2594 | abbrev_section, | |
927aa2e7 JK |
2595 | section->buffer + to_underlying (sect_off), |
2596 | rcuh_kind::TYPE); | |
2597 | ||
2598 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2599 | struct signatured_type); | |
2600 | sig_type->signature = cu_header.signature; | |
2601 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
2602 | sig_type->per_cu.is_debug_types = 1; | |
2603 | sig_type->per_cu.section = section; | |
2604 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 2605 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
2606 | sig_type->per_cu.v.quick |
2607 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2608 | struct dwarf2_per_cu_quick_data); | |
2609 | ||
b0b6a987 | 2610 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
927aa2e7 JK |
2611 | *slot = sig_type; |
2612 | ||
b2bdb8cf | 2613 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
2614 | } |
2615 | ||
b0b6a987 | 2616 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2617 | } |
2618 | ||
9291a0cd TT |
2619 | /* Read the address map data from the mapped index, and use it to |
2620 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2621 | |
9291a0cd | 2622 | static void |
ed2dc618 SM |
2623 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2624 | struct mapped_index *index) | |
9291a0cd | 2625 | { |
ed2dc618 | 2626 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 2627 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 2628 | const gdb_byte *iter, *end; |
9291a0cd | 2629 | struct addrmap *mutable_map; |
9291a0cd TT |
2630 | CORE_ADDR baseaddr; |
2631 | ||
8268c778 PA |
2632 | auto_obstack temp_obstack; |
2633 | ||
9291a0cd TT |
2634 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2635 | ||
f00a2de2 PA |
2636 | iter = index->address_table.data (); |
2637 | end = iter + index->address_table.size (); | |
9291a0cd | 2638 | |
b3b3bada | 2639 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2640 | |
2641 | while (iter < end) | |
2642 | { | |
2643 | ULONGEST hi, lo, cu_index; | |
2644 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2645 | iter += 8; | |
2646 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2647 | iter += 8; | |
2648 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2649 | iter += 4; | |
f652bce2 | 2650 | |
24a55014 | 2651 | if (lo > hi) |
f652bce2 | 2652 | { |
b98664d3 | 2653 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2654 | hex_string (lo), hex_string (hi)); |
24a55014 | 2655 | continue; |
f652bce2 | 2656 | } |
24a55014 | 2657 | |
b76e467d | 2658 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 2659 | { |
b98664d3 | 2660 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2661 | (unsigned) cu_index); |
24a55014 | 2662 | continue; |
f652bce2 | 2663 | } |
24a55014 | 2664 | |
79748972 TT |
2665 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2666 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2667 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 2668 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
2669 | } |
2670 | ||
d320c2b5 | 2671 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2672 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
2673 | } |
2674 | ||
927aa2e7 JK |
2675 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
2676 | populate the objfile's psymtabs_addrmap. */ | |
2677 | ||
2678 | static void | |
ed2dc618 | 2679 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2680 | struct dwarf2_section_info *section) |
2681 | { | |
ed2dc618 | 2682 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
2683 | bfd *abfd = objfile->obfd; |
2684 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
b3b3bada | 2685 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
927aa2e7 JK |
2686 | |
2687 | auto_obstack temp_obstack; | |
2688 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2689 | ||
2690 | std::unordered_map<sect_offset, | |
2691 | dwarf2_per_cu_data *, | |
2692 | gdb::hash_enum<sect_offset>> | |
2693 | debug_info_offset_to_per_cu; | |
b76e467d | 2694 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 2695 | { |
927aa2e7 JK |
2696 | const auto insertpair |
2697 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
2698 | if (!insertpair.second) | |
2699 | { | |
2700 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2701 | "debug_info_offset %s, ignoring .debug_aranges."), |
2702 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2703 | return; |
2704 | } | |
2705 | } | |
2706 | ||
96b79293 | 2707 | section->read (objfile); |
927aa2e7 JK |
2708 | |
2709 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2710 | ||
2711 | const gdb_byte *addr = section->buffer; | |
2712 | ||
2713 | while (addr < section->buffer + section->size) | |
2714 | { | |
2715 | const gdb_byte *const entry_addr = addr; | |
2716 | unsigned int bytes_read; | |
2717 | ||
2718 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2719 | &bytes_read); | |
2720 | addr += bytes_read; | |
2721 | ||
2722 | const gdb_byte *const entry_end = addr + entry_length; | |
2723 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2724 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2725 | if (addr + entry_length > section->buffer + section->size) | |
2726 | { | |
47e3f474 | 2727 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2728 | "length %s exceeds section length %s, " |
2729 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2730 | objfile_name (objfile), |
2731 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2732 | plongest (bytes_read + entry_length), |
2733 | pulongest (section->size)); | |
2734 | return; | |
2735 | } | |
2736 | ||
2737 | /* The version number. */ | |
2738 | const uint16_t version = read_2_bytes (abfd, addr); | |
2739 | addr += 2; | |
2740 | if (version != 2) | |
2741 | { | |
47e3f474 | 2742 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2743 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2744 | objfile_name (objfile), |
2745 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2746 | return; |
2747 | } | |
2748 | ||
2749 | const uint64_t debug_info_offset | |
2750 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2751 | addr += offset_size; | |
2752 | const auto per_cu_it | |
2753 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2754 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2755 | { | |
47e3f474 | 2756 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2757 | "debug_info_offset %s does not exists, " |
2758 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2759 | objfile_name (objfile), |
2760 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2761 | pulongest (debug_info_offset)); |
2762 | return; | |
2763 | } | |
2764 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2765 | ||
2766 | const uint8_t address_size = *addr++; | |
2767 | if (address_size < 1 || address_size > 8) | |
2768 | { | |
47e3f474 | 2769 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2770 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2771 | objfile_name (objfile), |
2772 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2773 | return; |
2774 | } | |
2775 | ||
2776 | const uint8_t segment_selector_size = *addr++; | |
2777 | if (segment_selector_size != 0) | |
2778 | { | |
47e3f474 | 2779 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2780 | "segment_selector_size %u is not supported, " |
2781 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2782 | objfile_name (objfile), |
2783 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2784 | segment_selector_size); |
2785 | return; | |
2786 | } | |
2787 | ||
2788 | /* Must pad to an alignment boundary that is twice the address | |
2789 | size. It is undocumented by the DWARF standard but GCC does | |
2790 | use it. */ | |
2791 | for (size_t padding = ((-(addr - section->buffer)) | |
2792 | & (2 * address_size - 1)); | |
2793 | padding > 0; padding--) | |
2794 | if (*addr++ != 0) | |
2795 | { | |
47e3f474 | 2796 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2797 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2798 | objfile_name (objfile), |
2799 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2800 | return; |
2801 | } | |
2802 | ||
2803 | for (;;) | |
2804 | { | |
2805 | if (addr + 2 * address_size > entry_end) | |
2806 | { | |
47e3f474 | 2807 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2808 | "address list is not properly terminated, " |
2809 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2810 | objfile_name (objfile), |
2811 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2812 | return; |
2813 | } | |
2814 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2815 | dwarf5_byte_order); | |
2816 | addr += address_size; | |
2817 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2818 | dwarf5_byte_order); | |
2819 | addr += address_size; | |
2820 | if (start == 0 && length == 0) | |
2821 | break; | |
2822 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
2823 | { | |
2824 | /* Symbol was eliminated due to a COMDAT group. */ | |
2825 | continue; | |
2826 | } | |
2827 | ULONGEST end = start + length; | |
79748972 TT |
2828 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2829 | - baseaddr); | |
2830 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2831 | - baseaddr); | |
927aa2e7 JK |
2832 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2833 | } | |
2834 | } | |
2835 | ||
d320c2b5 | 2836 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2837 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
2838 | } |
2839 | ||
9291a0cd TT |
2840 | /* Find a slot in the mapped index INDEX for the object named NAME. |
2841 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
2842 | constant pool and return true. If NAME cannot be found, return |
2843 | false. */ | |
2fdf6df6 | 2844 | |
109483d9 | 2845 | static bool |
9291a0cd TT |
2846 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
2847 | offset_type **vec_out) | |
2848 | { | |
0cf03b49 | 2849 | offset_type hash; |
9291a0cd | 2850 | offset_type slot, step; |
559a7a62 | 2851 | int (*cmp) (const char *, const char *); |
9291a0cd | 2852 | |
791afaa2 | 2853 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 2854 | if (current_language->la_language == language_cplus |
45280282 IB |
2855 | || current_language->la_language == language_fortran |
2856 | || current_language->la_language == language_d) | |
0cf03b49 JK |
2857 | { |
2858 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2859 | not contain any. */ | |
a8719064 | 2860 | |
72998fb3 | 2861 | if (strchr (name, '(') != NULL) |
0cf03b49 | 2862 | { |
109483d9 | 2863 | without_params = cp_remove_params (name); |
0cf03b49 | 2864 | |
72998fb3 | 2865 | if (without_params != NULL) |
791afaa2 | 2866 | name = without_params.get (); |
0cf03b49 JK |
2867 | } |
2868 | } | |
2869 | ||
559a7a62 | 2870 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2871 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2872 | simulate our NAME being searched is also lowercased. */ |
2873 | hash = mapped_index_string_hash ((index->version == 4 | |
2874 | && case_sensitivity == case_sensitive_off | |
2875 | ? 5 : index->version), | |
2876 | name); | |
2877 | ||
f00a2de2 PA |
2878 | slot = hash & (index->symbol_table.size () - 1); |
2879 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 2880 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2881 | |
2882 | for (;;) | |
2883 | { | |
9291a0cd | 2884 | const char *str; |
f00a2de2 PA |
2885 | |
2886 | const auto &bucket = index->symbol_table[slot]; | |
2887 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 2888 | return false; |
9291a0cd | 2889 | |
f00a2de2 | 2890 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 2891 | if (!cmp (name, str)) |
9291a0cd TT |
2892 | { |
2893 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 2894 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 2895 | return true; |
9291a0cd TT |
2896 | } |
2897 | ||
f00a2de2 | 2898 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
2899 | } |
2900 | } | |
2901 | ||
4485a1c1 SM |
2902 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2903 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2904 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2905 | ok to use deprecated sections. |
2906 | ||
2907 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2908 | out parameters that are filled in with information about the CU and | |
2909 | TU lists in the section. | |
2910 | ||
4485a1c1 | 2911 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2912 | |
d33bc52e | 2913 | static bool |
4485a1c1 SM |
2914 | read_gdb_index_from_buffer (struct objfile *objfile, |
2915 | const char *filename, | |
2916 | bool deprecated_ok, | |
2917 | gdb::array_view<const gdb_byte> buffer, | |
2918 | struct mapped_index *map, | |
2919 | const gdb_byte **cu_list, | |
2920 | offset_type *cu_list_elements, | |
2921 | const gdb_byte **types_list, | |
2922 | offset_type *types_list_elements) | |
2923 | { | |
2924 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 2925 | |
9291a0cd | 2926 | /* Version check. */ |
4485a1c1 | 2927 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2928 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2929 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2930 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2931 | indices. */ |
831adc1f | 2932 | if (version < 4) |
481860b3 GB |
2933 | { |
2934 | static int warning_printed = 0; | |
2935 | if (!warning_printed) | |
2936 | { | |
2937 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2938 | filename); |
481860b3 GB |
2939 | warning_printed = 1; |
2940 | } | |
2941 | return 0; | |
2942 | } | |
2943 | /* Index version 4 uses a different hash function than index version | |
2944 | 5 and later. | |
2945 | ||
2946 | Versions earlier than 6 did not emit psymbols for inlined | |
2947 | functions. Using these files will cause GDB not to be able to | |
2948 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2949 | indices unless the user has done |
2950 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2951 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2952 | { |
2953 | static int warning_printed = 0; | |
2954 | if (!warning_printed) | |
2955 | { | |
e615022a DE |
2956 | warning (_("\ |
2957 | Skipping deprecated .gdb_index section in %s.\n\ | |
2958 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2959 | to use the section anyway."), | |
2ec9a5e0 | 2960 | filename); |
481860b3 GB |
2961 | warning_printed = 1; |
2962 | } | |
2963 | return 0; | |
2964 | } | |
796a7ff8 | 2965 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2966 | of the TU (for symbols coming from TUs), |
2967 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2968 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2969 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2970 | These are just performance bugs, and we can't distinguish gdb-generated | |
2971 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2972 | |
481860b3 | 2973 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2974 | longer backward compatible. */ |
796a7ff8 | 2975 | if (version > 8) |
594e8718 | 2976 | return 0; |
9291a0cd | 2977 | |
559a7a62 | 2978 | map->version = version; |
9291a0cd | 2979 | |
4485a1c1 | 2980 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 2981 | |
4485a1c1 | 2982 | int i = 0; |
2ec9a5e0 TT |
2983 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2984 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2985 | / 8); | |
1fd400ff TT |
2986 | ++i; |
2987 | ||
2ec9a5e0 TT |
2988 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2989 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2990 | - MAYBE_SWAP (metadata[i])) | |
2991 | / 8); | |
987d643c | 2992 | ++i; |
1fd400ff | 2993 | |
f00a2de2 PA |
2994 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
2995 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2996 | map->address_table | |
2997 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2998 | ++i; |
2999 | ||
f00a2de2 PA |
3000 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3001 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3002 | map->symbol_table | |
3003 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3004 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3005 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3006 | |
f00a2de2 | 3007 | ++i; |
f9d83a0b | 3008 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3009 | |
2ec9a5e0 TT |
3010 | return 1; |
3011 | } | |
3012 | ||
4485a1c1 SM |
3013 | /* Callback types for dwarf2_read_gdb_index. */ |
3014 | ||
3015 | typedef gdb::function_view | |
3016 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
3017 | get_gdb_index_contents_ftype; | |
3018 | typedef gdb::function_view | |
3019 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
3020 | get_gdb_index_contents_dwz_ftype; | |
3021 | ||
927aa2e7 | 3022 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3023 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3024 | ||
3025 | static int | |
4485a1c1 SM |
3026 | dwarf2_read_gdb_index |
3027 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3028 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3029 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3030 | { |
2ec9a5e0 TT |
3031 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3032 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3033 | struct dwz_file *dwz; |
12359b5e | 3034 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3035 | |
4485a1c1 SM |
3036 | gdb::array_view<const gdb_byte> main_index_contents |
3037 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3038 | ||
3039 | if (main_index_contents.empty ()) | |
3040 | return 0; | |
3041 | ||
3063847f | 3042 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3043 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3044 | use_deprecated_index_sections, | |
3045 | main_index_contents, map.get (), &cu_list, | |
3046 | &cu_list_elements, &types_list, | |
3047 | &types_list_elements)) | |
2ec9a5e0 TT |
3048 | return 0; |
3049 | ||
0fefef59 | 3050 | /* Don't use the index if it's empty. */ |
3063847f | 3051 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3052 | return 0; |
3053 | ||
2ec9a5e0 TT |
3054 | /* If there is a .dwz file, read it so we can get its CU list as |
3055 | well. */ | |
ed2dc618 | 3056 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3057 | if (dwz != NULL) |
2ec9a5e0 | 3058 | { |
2ec9a5e0 TT |
3059 | struct mapped_index dwz_map; |
3060 | const gdb_byte *dwz_types_ignore; | |
3061 | offset_type dwz_types_elements_ignore; | |
3062 | ||
4485a1c1 SM |
3063 | gdb::array_view<const gdb_byte> dwz_index_content |
3064 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3065 | ||
3066 | if (dwz_index_content.empty ()) | |
3067 | return 0; | |
3068 | ||
3069 | if (!read_gdb_index_from_buffer (objfile, | |
00f93c44 AM |
3070 | bfd_get_filename (dwz->dwz_bfd.get ()), |
3071 | 1, dwz_index_content, &dwz_map, | |
4485a1c1 SM |
3072 | &dwz_list, &dwz_list_elements, |
3073 | &dwz_types_ignore, | |
3074 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3075 | { |
3076 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3077 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3078 | return 0; |
3079 | } | |
3080 | } | |
3081 | ||
12359b5e SM |
3082 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3083 | dwz_list, dwz_list_elements); | |
1fd400ff | 3084 | |
8b70b953 TT |
3085 | if (types_list_elements) |
3086 | { | |
8b70b953 TT |
3087 | /* We can only handle a single .debug_types when we have an |
3088 | index. */ | |
fd5866f6 | 3089 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3090 | return 0; |
3091 | ||
fd5866f6 | 3092 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3093 | |
12359b5e SM |
3094 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3095 | types_list, types_list_elements); | |
8b70b953 | 3096 | } |
9291a0cd | 3097 | |
3063847f | 3098 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3099 | |
3063847f | 3100 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3101 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3102 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3103 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3104 | |
3105 | return 1; | |
3106 | } | |
3107 | ||
dee91e82 | 3108 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3109 | |
dee91e82 DE |
3110 | static void |
3111 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3112 | const gdb_byte *info_ptr, |
3e225074 | 3113 | struct die_info *comp_unit_die) |
9291a0cd | 3114 | { |
dee91e82 | 3115 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3116 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3117 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3118 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3119 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3120 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3121 | struct attribute *attr; |
7b9f3c50 DE |
3122 | void **slot; |
3123 | struct quick_file_names *qfn; | |
9291a0cd | 3124 | |
0186c6a7 DE |
3125 | gdb_assert (! this_cu->is_debug_types); |
3126 | ||
07261596 TT |
3127 | /* Our callers never want to match partial units -- instead they |
3128 | will match the enclosing full CU. */ | |
3129 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3130 | { | |
3131 | this_cu->v.quick->no_file_data = 1; | |
3132 | return; | |
3133 | } | |
3134 | ||
0186c6a7 | 3135 | lh_cu = this_cu; |
7b9f3c50 | 3136 | slot = NULL; |
dee91e82 | 3137 | |
fff8551c | 3138 | line_header_up lh; |
9c541725 | 3139 | sect_offset line_offset {}; |
fff8551c | 3140 | |
dee91e82 | 3141 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
435d3d88 | 3142 | if (attr != nullptr) |
9291a0cd | 3143 | { |
7b9f3c50 DE |
3144 | struct quick_file_names find_entry; |
3145 | ||
9c541725 | 3146 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3147 | |
3148 | /* We may have already read in this line header (TU line header sharing). | |
3149 | If we have we're done. */ | |
094b34ac | 3150 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3151 | find_entry.hash.line_sect_off = line_offset; |
5895093f | 3152 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 DE |
3153 | &find_entry, INSERT); |
3154 | if (*slot != NULL) | |
3155 | { | |
9a3c8263 | 3156 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3157 | return; |
7b9f3c50 DE |
3158 | } |
3159 | ||
3019eac3 | 3160 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3161 | } |
3162 | if (lh == NULL) | |
3163 | { | |
094b34ac | 3164 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3165 | return; |
9291a0cd TT |
3166 | } |
3167 | ||
8d749320 | 3168 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3169 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3170 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3171 | gdb_assert (slot != NULL); |
3172 | *slot = qfn; | |
9291a0cd | 3173 | |
d721ba37 | 3174 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3175 | |
aa391654 TT |
3176 | int offset = 0; |
3177 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3178 | ++offset; | |
3179 | ||
7ba99d21 | 3180 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 3181 | qfn->file_names = |
aa391654 TT |
3182 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3183 | if (offset != 0) | |
3184 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 3185 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
3186 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
3187 | fnd.comp_dir).release (); | |
7b9f3c50 | 3188 | qfn->real_names = NULL; |
9291a0cd | 3189 | |
094b34ac | 3190 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3191 | } |
3192 | ||
3193 | /* A helper for the "quick" functions which attempts to read the line | |
3194 | table for THIS_CU. */ | |
3195 | ||
3196 | static struct quick_file_names * | |
e4a48d9d | 3197 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3198 | { |
0186c6a7 DE |
3199 | /* This should never be called for TUs. */ |
3200 | gdb_assert (! this_cu->is_debug_types); | |
3201 | /* Nor type unit groups. */ | |
197400e8 | 3202 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 3203 | |
dee91e82 DE |
3204 | if (this_cu->v.quick->file_names != NULL) |
3205 | return this_cu->v.quick->file_names; | |
3206 | /* If we know there is no line data, no point in looking again. */ | |
3207 | if (this_cu->v.quick->no_file_data) | |
3208 | return NULL; | |
3209 | ||
c0ab21c2 TT |
3210 | cutu_reader reader (this_cu); |
3211 | if (!reader.dummy_p) | |
3e225074 | 3212 | dw2_get_file_names_reader (&reader, reader.info_ptr, reader.comp_unit_die); |
dee91e82 DE |
3213 | |
3214 | if (this_cu->v.quick->no_file_data) | |
3215 | return NULL; | |
3216 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3217 | } |
3218 | ||
3219 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3220 | real path for a given file name from the line table. */ |
2fdf6df6 | 3221 | |
9291a0cd | 3222 | static const char * |
7b9f3c50 DE |
3223 | dw2_get_real_path (struct objfile *objfile, |
3224 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3225 | { |
7b9f3c50 DE |
3226 | if (qfn->real_names == NULL) |
3227 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3228 | qfn->num_file_names, const char *); |
9291a0cd | 3229 | |
7b9f3c50 | 3230 | if (qfn->real_names[index] == NULL) |
14278e1f | 3231 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3232 | |
7b9f3c50 | 3233 | return qfn->real_names[index]; |
9291a0cd TT |
3234 | } |
3235 | ||
3236 | static struct symtab * | |
3237 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3238 | { | |
ed2dc618 SM |
3239 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3240 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3241 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3242 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3243 | |
43f3e411 DE |
3244 | if (cust == NULL) |
3245 | return NULL; | |
ed2dc618 | 3246 | |
43f3e411 | 3247 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3248 | } |
3249 | ||
7b9f3c50 DE |
3250 | /* Traversal function for dw2_forget_cached_source_info. */ |
3251 | ||
3252 | static int | |
3253 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3254 | { |
7b9f3c50 | 3255 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3256 | |
7b9f3c50 | 3257 | if (file_data->real_names) |
9291a0cd | 3258 | { |
7b9f3c50 | 3259 | int i; |
9291a0cd | 3260 | |
7b9f3c50 | 3261 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3262 | { |
7b9f3c50 DE |
3263 | xfree ((void*) file_data->real_names[i]); |
3264 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3265 | } |
3266 | } | |
7b9f3c50 DE |
3267 | |
3268 | return 1; | |
3269 | } | |
3270 | ||
3271 | static void | |
3272 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3273 | { | |
ed2dc618 SM |
3274 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3275 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 | 3276 | |
5895093f | 3277 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 | 3278 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3279 | } |
3280 | ||
f8eba3c6 TT |
3281 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3282 | the symtabs and calls the iterator. */ | |
3283 | ||
3284 | static int | |
3285 | dw2_map_expand_apply (struct objfile *objfile, | |
3286 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3287 | const char *name, const char *real_path, |
14bc53a8 | 3288 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3289 | { |
43f3e411 | 3290 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3291 | |
3292 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3293 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3294 | return 0; |
3295 | ||
3296 | /* This may expand more than one symtab, and we want to iterate over | |
3297 | all of them. */ | |
58f0c718 | 3298 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3299 | |
14bc53a8 PA |
3300 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3301 | last_made, callback); | |
f8eba3c6 TT |
3302 | } |
3303 | ||
3304 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3305 | ||
14bc53a8 PA |
3306 | static bool |
3307 | dw2_map_symtabs_matching_filename | |
3308 | (struct objfile *objfile, const char *name, const char *real_path, | |
3309 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3310 | { |
c011a4f4 | 3311 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3312 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3313 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3314 | |
848e3e78 DE |
3315 | /* The rule is CUs specify all the files, including those used by |
3316 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3317 | |
b76e467d | 3318 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3319 | { |
3d7bb9d9 | 3320 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3321 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3322 | continue; |
3323 | ||
b76e467d | 3324 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3325 | if (file_data == NULL) |
9291a0cd TT |
3326 | continue; |
3327 | ||
b76e467d | 3328 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3329 | { |
7b9f3c50 | 3330 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3331 | const char *this_real_name; |
9291a0cd | 3332 | |
af529f8f | 3333 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3334 | { |
f5b95b50 | 3335 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3336 | callback)) |
3337 | return true; | |
288e77a7 | 3338 | continue; |
4aac40c8 | 3339 | } |
9291a0cd | 3340 | |
c011a4f4 DE |
3341 | /* Before we invoke realpath, which can get expensive when many |
3342 | files are involved, do a quick comparison of the basenames. */ | |
3343 | if (! basenames_may_differ | |
3344 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3345 | continue; | |
3346 | ||
da235a7c JK |
3347 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3348 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3349 | { |
da235a7c | 3350 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3351 | callback)) |
3352 | return true; | |
288e77a7 | 3353 | continue; |
da235a7c | 3354 | } |
9291a0cd | 3355 | |
da235a7c JK |
3356 | if (real_path != NULL) |
3357 | { | |
af529f8f JK |
3358 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3359 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3360 | if (this_real_name != NULL |
af529f8f | 3361 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3362 | { |
f5b95b50 | 3363 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3364 | callback)) |
3365 | return true; | |
288e77a7 | 3366 | continue; |
9291a0cd TT |
3367 | } |
3368 | } | |
3369 | } | |
3370 | } | |
3371 | ||
14bc53a8 | 3372 | return false; |
9291a0cd TT |
3373 | } |
3374 | ||
da51c347 DE |
3375 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3376 | ||
3377 | struct dw2_symtab_iterator | |
9291a0cd | 3378 | { |
ed2dc618 SM |
3379 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3380 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3381 | /* If set, only look for symbols that match that block. Valid values are |
3382 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3383 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3384 | /* The kind of symbol we're looking for. */ |
3385 | domain_enum domain; | |
3386 | /* The list of CUs from the index entry of the symbol, | |
3387 | or NULL if not found. */ | |
3388 | offset_type *vec; | |
3389 | /* The next element in VEC to look at. */ | |
3390 | int next; | |
3391 | /* The number of elements in VEC, or zero if there is no match. */ | |
3392 | int length; | |
8943b874 DE |
3393 | /* Have we seen a global version of the symbol? |
3394 | If so we can ignore all further global instances. | |
3395 | This is to work around gold/15646, inefficient gold-generated | |
3396 | indices. */ | |
3397 | int global_seen; | |
da51c347 | 3398 | }; |
9291a0cd | 3399 | |
2b79f376 | 3400 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3401 | |
9291a0cd | 3402 | static void |
da51c347 | 3403 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3404 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3405 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3406 | domain_enum domain, |
3407 | const char *name) | |
3408 | { | |
ed2dc618 | 3409 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3410 | iter->block_index = block_index; |
3411 | iter->domain = domain; | |
3412 | iter->next = 0; | |
8943b874 | 3413 | iter->global_seen = 0; |
da51c347 | 3414 | |
3063847f | 3415 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3416 | |
3417 | /* index is NULL if OBJF_READNOW. */ | |
3418 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3419 | iter->length = MAYBE_SWAP (*iter->vec); |
3420 | else | |
3421 | { | |
3422 | iter->vec = NULL; | |
3423 | iter->length = 0; | |
3424 | } | |
3425 | } | |
3426 | ||
3427 | /* Return the next matching CU or NULL if there are no more. */ | |
3428 | ||
3429 | static struct dwarf2_per_cu_data * | |
3430 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3431 | { | |
ed2dc618 SM |
3432 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3433 | ||
da51c347 DE |
3434 | for ( ; iter->next < iter->length; ++iter->next) |
3435 | { | |
3436 | offset_type cu_index_and_attrs = | |
3437 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3438 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3439 | gdb_index_symbol_kind symbol_kind = |
3440 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3441 | /* Only check the symbol attributes if they're present. | |
3442 | Indices prior to version 7 don't record them, | |
3443 | and indices >= 7 may elide them for certain symbols | |
3444 | (gold does this). */ | |
3445 | int attrs_valid = | |
ed2dc618 | 3446 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3447 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3448 | ||
3190f0c6 | 3449 | /* Don't crash on bad data. */ |
b76e467d | 3450 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3451 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3452 | { |
b98664d3 | 3453 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3454 | " [in module %s]"), |
3455 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3456 | continue; |
3457 | } | |
3458 | ||
ff4c9fec | 3459 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3460 | |
da51c347 | 3461 | /* Skip if already read in. */ |
43f3e411 | 3462 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3463 | continue; |
3464 | ||
8943b874 DE |
3465 | /* Check static vs global. */ |
3466 | if (attrs_valid) | |
3467 | { | |
2b79f376 SM |
3468 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3469 | ||
3470 | if (iter->block_index.has_value ()) | |
3471 | { | |
3472 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3473 | ||
3474 | if (is_static != want_static) | |
3475 | continue; | |
3476 | } | |
3477 | ||
8943b874 DE |
3478 | /* Work around gold/15646. */ |
3479 | if (!is_static && iter->global_seen) | |
3480 | continue; | |
3481 | if (!is_static) | |
3482 | iter->global_seen = 1; | |
3483 | } | |
da51c347 DE |
3484 | |
3485 | /* Only check the symbol's kind if it has one. */ | |
3486 | if (attrs_valid) | |
3487 | { | |
3488 | switch (iter->domain) | |
3489 | { | |
3490 | case VAR_DOMAIN: | |
3491 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3492 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3493 | /* Some types are also in VAR_DOMAIN. */ | |
3494 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3495 | continue; | |
3496 | break; | |
3497 | case STRUCT_DOMAIN: | |
3498 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3499 | continue; | |
3500 | break; | |
3501 | case LABEL_DOMAIN: | |
3502 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3503 | continue; | |
3504 | break; | |
59c35742 AB |
3505 | case MODULE_DOMAIN: |
3506 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3507 | continue; | |
3508 | break; | |
da51c347 DE |
3509 | default: |
3510 | break; | |
3511 | } | |
3512 | } | |
3513 | ||
3514 | ++iter->next; | |
3515 | return per_cu; | |
3516 | } | |
3517 | ||
3518 | return NULL; | |
3519 | } | |
3520 | ||
43f3e411 | 3521 | static struct compunit_symtab * |
c7f839cb | 3522 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 3523 | const char *name, domain_enum domain) |
9291a0cd | 3524 | { |
43f3e411 | 3525 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
3526 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3527 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 3528 | |
b5ec771e PA |
3529 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3530 | ||
ed2dc618 SM |
3531 | struct dw2_symtab_iterator iter; |
3532 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3533 | |
2b79f376 | 3534 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 3535 | |
ed2dc618 SM |
3536 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
3537 | { | |
3538 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 3539 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 3540 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 3541 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3542 | |
ed2dc618 SM |
3543 | sym = block_find_symbol (block, name, domain, |
3544 | block_find_non_opaque_type_preferred, | |
3545 | &with_opaque); | |
b2e2f908 | 3546 | |
ed2dc618 SM |
3547 | /* Some caution must be observed with overloaded functions |
3548 | and methods, since the index will not contain any overload | |
3549 | information (but NAME might contain it). */ | |
da51c347 | 3550 | |
ed2dc618 SM |
3551 | if (sym != NULL |
3552 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
3553 | return stab; | |
3554 | if (with_opaque != NULL | |
3555 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
3556 | stab_best = stab; | |
da51c347 | 3557 | |
ed2dc618 | 3558 | /* Keep looking through other CUs. */ |
9291a0cd | 3559 | } |
9291a0cd | 3560 | |
da51c347 | 3561 | return stab_best; |
9291a0cd TT |
3562 | } |
3563 | ||
3564 | static void | |
3565 | dw2_print_stats (struct objfile *objfile) | |
3566 | { | |
ed2dc618 SM |
3567 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3568 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3569 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3570 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 3571 | int count = 0; |
9291a0cd | 3572 | |
ed2dc618 | 3573 | for (int i = 0; i < total; ++i) |
9291a0cd | 3574 | { |
ff4c9fec | 3575 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3576 | |
43f3e411 | 3577 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3578 | ++count; |
3579 | } | |
e4a48d9d | 3580 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3581 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3582 | } | |
3583 | ||
779bd270 DE |
3584 | /* This dumps minimal information about the index. |
3585 | It is called via "mt print objfiles". | |
3586 | One use is to verify .gdb_index has been loaded by the | |
3587 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3588 | ||
9291a0cd TT |
3589 | static void |
3590 | dw2_dump (struct objfile *objfile) | |
3591 | { | |
ed2dc618 SM |
3592 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3593 | = get_dwarf2_per_objfile (objfile); | |
3594 | ||
779bd270 DE |
3595 | gdb_assert (dwarf2_per_objfile->using_index); |
3596 | printf_filtered (".gdb_index:"); | |
3597 | if (dwarf2_per_objfile->index_table != NULL) | |
3598 | { | |
3599 | printf_filtered (" version %d\n", | |
3600 | dwarf2_per_objfile->index_table->version); | |
3601 | } | |
3602 | else | |
3603 | printf_filtered (" faked for \"readnow\"\n"); | |
3604 | printf_filtered ("\n"); | |
9291a0cd TT |
3605 | } |
3606 | ||
9291a0cd TT |
3607 | static void |
3608 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3609 | const char *func_name) | |
3610 | { | |
ed2dc618 SM |
3611 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3612 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 3613 | |
ed2dc618 SM |
3614 | struct dw2_symtab_iterator iter; |
3615 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3616 | |
2b79f376 | 3617 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 3618 | |
ed2dc618 | 3619 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 3620 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 3621 | |
9291a0cd TT |
3622 | } |
3623 | ||
3624 | static void | |
3625 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3626 | { | |
ed2dc618 SM |
3627 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3628 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3629 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3630 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 3631 | |
ed2dc618 | 3632 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3633 | { |
ff4c9fec | 3634 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3635 | |
58f0c718 TT |
3636 | /* We don't want to directly expand a partial CU, because if we |
3637 | read it with the wrong language, then assertion failures can | |
3638 | be triggered later on. See PR symtab/23010. So, tell | |
3639 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3640 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
3641 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
3642 | } |
3643 | } | |
3644 | ||
3645 | static void | |
652a8996 JK |
3646 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3647 | const char *fullname) | |
9291a0cd | 3648 | { |
ed2dc618 SM |
3649 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3650 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
3651 | |
3652 | /* We don't need to consider type units here. | |
3653 | This is only called for examining code, e.g. expand_line_sal. | |
3654 | There can be an order of magnitude (or more) more type units | |
3655 | than comp units, and we avoid them if we can. */ | |
3656 | ||
b76e467d | 3657 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3658 | { |
3d7bb9d9 | 3659 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3660 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3661 | continue; |
3662 | ||
b76e467d | 3663 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3664 | if (file_data == NULL) |
9291a0cd TT |
3665 | continue; |
3666 | ||
b76e467d | 3667 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3668 | { |
652a8996 JK |
3669 | const char *this_fullname = file_data->file_names[j]; |
3670 | ||
3671 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3672 | { |
58f0c718 | 3673 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
3674 | break; |
3675 | } | |
3676 | } | |
3677 | } | |
3678 | } | |
3679 | ||
9291a0cd | 3680 | static void |
199b4314 TT |
3681 | dw2_map_matching_symbols |
3682 | (struct objfile *objfile, | |
b054970d | 3683 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
3684 | int global, |
3685 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 3686 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3687 | { |
40658b94 | 3688 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3689 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3690 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3691 | } |
3692 | ||
e1ef7d7a PA |
3693 | /* Starting from a search name, return the string that finds the upper |
3694 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3695 | list. Returns the empty string to indicate that the upper bound is | |
3696 | the end of the list. */ | |
3697 | ||
3698 | static std::string | |
3699 | make_sort_after_prefix_name (const char *search_name) | |
3700 | { | |
3701 | /* When looking to complete "func", we find the upper bound of all | |
3702 | symbols that start with "func" by looking for where we'd insert | |
3703 | the closest string that would follow "func" in lexicographical | |
3704 | order. Usually, that's "func"-with-last-character-incremented, | |
3705 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3706 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3707 | Especially mind the 0xff character, which is a valid character in | |
3708 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3709 | rule out compilers allowing it in identifiers. Note that | |
3710 | conveniently, strcmp/strcasecmp are specified to compare | |
3711 | characters interpreted as unsigned char. So what we do is treat | |
3712 | the whole string as a base 256 number composed of a sequence of | |
3713 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3714 | to 0, and carries 1 to the following more-significant position. | |
3715 | If the very first character in SEARCH_NAME ends up incremented | |
3716 | and carries/overflows, then the upper bound is the end of the | |
3717 | list. The string after the empty string is also the empty | |
3718 | string. | |
3719 | ||
3720 | Some examples of this operation: | |
3721 | ||
3722 | SEARCH_NAME => "+1" RESULT | |
3723 | ||
3724 | "abc" => "abd" | |
3725 | "ab\xff" => "ac" | |
3726 | "\xff" "a" "\xff" => "\xff" "b" | |
3727 | "\xff" => "" | |
3728 | "\xff\xff" => "" | |
3729 | "" => "" | |
3730 | ||
3731 | Then, with these symbols for example: | |
3732 | ||
3733 | func | |
3734 | func1 | |
3735 | fund | |
3736 | ||
3737 | completing "func" looks for symbols between "func" and | |
3738 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3739 | which finds "func" and "func1", but not "fund". | |
3740 | ||
3741 | And with: | |
3742 | ||
3743 | funcÿ (Latin1 'ÿ' [0xff]) | |
3744 | funcÿ1 | |
3745 | fund | |
3746 | ||
3747 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3748 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3749 | ||
3750 | And with: | |
3751 | ||
3752 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3753 | ÿÿ1 | |
3754 | ||
3755 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3756 | the end of the list. | |
3757 | */ | |
3758 | std::string after = search_name; | |
3759 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3760 | after.pop_back (); | |
3761 | if (!after.empty ()) | |
3762 | after.back () = (unsigned char) after.back () + 1; | |
3763 | return after; | |
3764 | } | |
3765 | ||
5c58de74 | 3766 | /* See declaration. */ |
61d96d7e | 3767 | |
5c58de74 PA |
3768 | std::pair<std::vector<name_component>::const_iterator, |
3769 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3770 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 3771 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 3772 | { |
5c58de74 PA |
3773 | auto *name_cmp |
3774 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3775 | |
3b00ef10 TT |
3776 | const char *lang_name |
3777 | = lookup_name_without_params.language_lookup_name (lang).c_str (); | |
9291a0cd | 3778 | |
3f563c84 PA |
3779 | /* Comparison function object for lower_bound that matches against a |
3780 | given symbol name. */ | |
3781 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3782 | const char *name) | |
3783 | { | |
5c58de74 | 3784 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3785 | const char *elem_name = elem_qualified + elem.name_offset; |
3786 | return name_cmp (elem_name, name) < 0; | |
3787 | }; | |
3788 | ||
3789 | /* Comparison function object for upper_bound that matches against a | |
3790 | given symbol name. */ | |
3791 | auto lookup_compare_upper = [&] (const char *name, | |
3792 | const name_component &elem) | |
3793 | { | |
5c58de74 | 3794 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3795 | const char *elem_name = elem_qualified + elem.name_offset; |
3796 | return name_cmp (name, elem_name) < 0; | |
3797 | }; | |
3798 | ||
5c58de74 PA |
3799 | auto begin = this->name_components.begin (); |
3800 | auto end = this->name_components.end (); | |
3f563c84 PA |
3801 | |
3802 | /* Find the lower bound. */ | |
3803 | auto lower = [&] () | |
3804 | { | |
3b00ef10 | 3805 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3806 | return begin; |
3807 | else | |
3b00ef10 | 3808 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3809 | } (); |
3810 | ||
3811 | /* Find the upper bound. */ | |
3812 | auto upper = [&] () | |
3813 | { | |
5c58de74 | 3814 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3815 | { |
e1ef7d7a PA |
3816 | /* In completion mode, we want UPPER to point past all |
3817 | symbols names that have the same prefix. I.e., with | |
3818 | these symbols, and completing "func": | |
3819 | ||
3820 | function << lower bound | |
3821 | function1 | |
3822 | other_function << upper bound | |
3823 | ||
3824 | We find the upper bound by looking for the insertion | |
3825 | point of "func"-with-last-character-incremented, | |
3826 | i.e. "fund". */ | |
3b00ef10 | 3827 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3828 | if (after.empty ()) |
3f563c84 | 3829 | return end; |
e6b2f5ef PA |
3830 | return std::lower_bound (lower, end, after.c_str (), |
3831 | lookup_compare_lower); | |
3f563c84 PA |
3832 | } |
3833 | else | |
3b00ef10 | 3834 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3835 | } (); |
3836 | ||
5c58de74 PA |
3837 | return {lower, upper}; |
3838 | } | |
3839 | ||
3840 | /* See declaration. */ | |
3841 | ||
3842 | void | |
44ed8f3e | 3843 | mapped_index_base::build_name_components () |
5c58de74 PA |
3844 | { |
3845 | if (!this->name_components.empty ()) | |
3846 | return; | |
3847 | ||
3848 | this->name_components_casing = case_sensitivity; | |
3849 | auto *name_cmp | |
3850 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3851 | ||
3852 | /* The code below only knows how to break apart components of C++ | |
3853 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3854 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3855 | auto count = this->symbol_name_count (); |
3856 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3857 | { |
44ed8f3e | 3858 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3859 | continue; |
3860 | ||
3861 | const char *name = this->symbol_name_at (idx); | |
3862 | ||
3863 | /* Add each name component to the name component table. */ | |
3864 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3865 | |
3866 | if (strstr (name, "::") != nullptr) | |
3867 | { | |
3868 | for (unsigned int current_len = cp_find_first_component (name); | |
3869 | name[current_len] != '\0'; | |
3870 | current_len += cp_find_first_component (name + current_len)) | |
3871 | { | |
3872 | gdb_assert (name[current_len] == ':'); | |
3873 | this->name_components.push_back ({previous_len, idx}); | |
3874 | /* Skip the '::'. */ | |
3875 | current_len += 2; | |
3876 | previous_len = current_len; | |
3877 | } | |
3878 | } | |
3879 | else | |
5c58de74 | 3880 | { |
3b00ef10 TT |
3881 | /* Handle the Ada encoded (aka mangled) form here. */ |
3882 | for (const char *iter = strstr (name, "__"); | |
3883 | iter != nullptr; | |
3884 | iter = strstr (iter, "__")) | |
3885 | { | |
3886 | this->name_components.push_back ({previous_len, idx}); | |
3887 | iter += 2; | |
3888 | previous_len = iter - name; | |
3889 | } | |
5c58de74 | 3890 | } |
3b00ef10 | 3891 | |
5c58de74 PA |
3892 | this->name_components.push_back ({previous_len, idx}); |
3893 | } | |
3894 | ||
3895 | /* Sort name_components elements by name. */ | |
3896 | auto name_comp_compare = [&] (const name_component &left, | |
3897 | const name_component &right) | |
3898 | { | |
3899 | const char *left_qualified = this->symbol_name_at (left.idx); | |
3900 | const char *right_qualified = this->symbol_name_at (right.idx); | |
3901 | ||
3902 | const char *left_name = left_qualified + left.name_offset; | |
3903 | const char *right_name = right_qualified + right.name_offset; | |
3904 | ||
3905 | return name_cmp (left_name, right_name) < 0; | |
3906 | }; | |
3907 | ||
3908 | std::sort (this->name_components.begin (), | |
3909 | this->name_components.end (), | |
3910 | name_comp_compare); | |
3911 | } | |
3912 | ||
3913 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3914 | mapped_index_base instead of the containing objfile. This is split |
3915 | to a separate function in order to be able to unit test the | |
3916 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3917 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3918 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
3919 | |
3920 | static void | |
3921 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 3922 | (mapped_index_base &index, |
5c58de74 PA |
3923 | const lookup_name_info &lookup_name_in, |
3924 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
3925 | enum search_domain kind, | |
3b00ef10 | 3926 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
3927 | { |
3928 | lookup_name_info lookup_name_without_params | |
3929 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3930 | |
3931 | /* Build the symbol name component sorted vector, if we haven't | |
3932 | yet. */ | |
3933 | index.build_name_components (); | |
3934 | ||
3f563c84 PA |
3935 | /* The same symbol may appear more than once in the range though. |
3936 | E.g., if we're looking for symbols that complete "w", and we have | |
3937 | a symbol named "w1::w2", we'll find the two name components for | |
3938 | that same symbol in the range. To be sure we only call the | |
3939 | callback once per symbol, we first collect the symbol name | |
3940 | indexes that matched in a temporary vector and ignore | |
3941 | duplicates. */ | |
3942 | std::vector<offset_type> matches; | |
3f563c84 | 3943 | |
3b00ef10 TT |
3944 | struct name_and_matcher |
3945 | { | |
3946 | symbol_name_matcher_ftype *matcher; | |
3947 | const std::string &name; | |
3948 | ||
3949 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3950 | { |
3b00ef10 TT |
3951 | return matcher == other.matcher && name == other.name; |
3952 | } | |
3953 | }; | |
3954 | ||
3955 | /* A vector holding all the different symbol name matchers, for all | |
3956 | languages. */ | |
3957 | std::vector<name_and_matcher> matchers; | |
3958 | ||
3959 | for (int i = 0; i < nr_languages; i++) | |
3960 | { | |
3961 | enum language lang_e = (enum language) i; | |
3962 | ||
3963 | const language_defn *lang = language_def (lang_e); | |
3964 | symbol_name_matcher_ftype *name_matcher | |
3965 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 3966 | |
3b00ef10 TT |
3967 | name_and_matcher key { |
3968 | name_matcher, | |
3969 | lookup_name_without_params.language_lookup_name (lang_e) | |
3970 | }; | |
3971 | ||
3972 | /* Don't insert the same comparison routine more than once. | |
3973 | Note that we do this linear walk. This is not a problem in | |
3974 | practice because the number of supported languages is | |
3975 | low. */ | |
3976 | if (std::find (matchers.begin (), matchers.end (), key) | |
3977 | != matchers.end ()) | |
9291a0cd | 3978 | continue; |
3b00ef10 TT |
3979 | matchers.push_back (std::move (key)); |
3980 | ||
3981 | auto bounds | |
3982 | = index.find_name_components_bounds (lookup_name_without_params, | |
3983 | lang_e); | |
3984 | ||
3985 | /* Now for each symbol name in range, check to see if we have a name | |
3986 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3987 | ||
3988 | for (; bounds.first != bounds.second; ++bounds.first) | |
3989 | { | |
3990 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
3991 | ||
3992 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3993 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3994 | continue; | |
9291a0cd | 3995 | |
3b00ef10 TT |
3996 | matches.push_back (bounds.first->idx); |
3997 | } | |
3f563c84 PA |
3998 | } |
3999 | ||
4000 | std::sort (matches.begin (), matches.end ()); | |
4001 | ||
4002 | /* Finally call the callback, once per match. */ | |
4003 | ULONGEST prev = -1; | |
4004 | for (offset_type idx : matches) | |
4005 | { | |
4006 | if (prev != idx) | |
4007 | { | |
3b00ef10 TT |
4008 | if (!match_callback (idx)) |
4009 | break; | |
3f563c84 PA |
4010 | prev = idx; |
4011 | } | |
4012 | } | |
4013 | ||
4014 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4015 | (offset_type)-1 are both possible values. */ | |
4016 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4017 | } | |
4018 | ||
c62446b1 PA |
4019 | #if GDB_SELF_TEST |
4020 | ||
4021 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4022 | ||
a3c5fafd PA |
4023 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4024 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4025 | mapped_index_base interface. Builds an index from the symbol list | |
4026 | passed as parameter to the constructor. */ | |
4027 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4028 | { |
4029 | public: | |
a3c5fafd PA |
4030 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4031 | : m_symbol_table (symbols) | |
c62446b1 PA |
4032 | {} |
4033 | ||
a3c5fafd | 4034 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4035 | |
a3c5fafd | 4036 | /* Return the number of names in the symbol table. */ |
632e107b | 4037 | size_t symbol_name_count () const override |
c62446b1 | 4038 | { |
a3c5fafd | 4039 | return m_symbol_table.size (); |
c62446b1 PA |
4040 | } |
4041 | ||
a3c5fafd | 4042 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4043 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4044 | { |
4045 | return m_symbol_table[idx]; | |
4046 | } | |
c62446b1 | 4047 | |
a3c5fafd PA |
4048 | private: |
4049 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4050 | }; |
4051 | ||
4052 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4053 | string, to pass to print routines. */ | |
4054 | ||
4055 | static const char * | |
4056 | string_or_null (const char *str) | |
4057 | { | |
4058 | return str != NULL ? str : "<null>"; | |
4059 | } | |
4060 | ||
4061 | /* Check if a lookup_name_info built from | |
4062 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4063 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4064 | matching order. If no match expected, then an empty list is | |
4065 | specified. Returns true on success. On failure prints a warning | |
4066 | indicating the file:line that failed, and returns false. */ | |
4067 | ||
4068 | static bool | |
4069 | check_match (const char *file, int line, | |
4070 | mock_mapped_index &mock_index, | |
4071 | const char *name, symbol_name_match_type match_type, | |
4072 | bool completion_mode, | |
4073 | std::initializer_list<const char *> expected_list) | |
4074 | { | |
4075 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4076 | ||
4077 | bool matched = true; | |
4078 | ||
4079 | auto mismatch = [&] (const char *expected_str, | |
4080 | const char *got) | |
4081 | { | |
4082 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4083 | "expected=\"%s\", got=\"%s\"\n"), | |
4084 | file, line, | |
4085 | (match_type == symbol_name_match_type::FULL | |
4086 | ? "FULL" : "WILD"), | |
4087 | name, string_or_null (expected_str), string_or_null (got)); | |
4088 | matched = false; | |
4089 | }; | |
4090 | ||
4091 | auto expected_it = expected_list.begin (); | |
4092 | auto expected_end = expected_list.end (); | |
4093 | ||
a3c5fafd | 4094 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4095 | NULL, ALL_DOMAIN, |
4096 | [&] (offset_type idx) | |
4097 | { | |
a3c5fafd | 4098 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4099 | const char *expected_str |
4100 | = expected_it == expected_end ? NULL : *expected_it++; | |
4101 | ||
4102 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4103 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4104 | return true; |
c62446b1 PA |
4105 | }); |
4106 | ||
4107 | const char *expected_str | |
4108 | = expected_it == expected_end ? NULL : *expected_it++; | |
4109 | if (expected_str != NULL) | |
4110 | mismatch (expected_str, NULL); | |
4111 | ||
4112 | return matched; | |
4113 | } | |
4114 | ||
4115 | /* The symbols added to the mock mapped_index for testing (in | |
4116 | canonical form). */ | |
4117 | static const char *test_symbols[] = { | |
4118 | "function", | |
4119 | "std::bar", | |
4120 | "std::zfunction", | |
4121 | "std::zfunction2", | |
4122 | "w1::w2", | |
4123 | "ns::foo<char*>", | |
4124 | "ns::foo<int>", | |
4125 | "ns::foo<long>", | |
a20714ff PA |
4126 | "ns2::tmpl<int>::foo2", |
4127 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4128 | |
e1ef7d7a PA |
4129 | /* These are used to check that the increment-last-char in the |
4130 | matching algorithm for completion doesn't match "t1_fund" when | |
4131 | completing "t1_func". */ | |
4132 | "t1_func", | |
4133 | "t1_func1", | |
4134 | "t1_fund", | |
4135 | "t1_fund1", | |
4136 | ||
4137 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4138 | cp-name-parser understands this as a single identifier ("função" | |
4139 | is "function" in PT). */ | |
4140 | u8"u8função", | |
4141 | ||
4142 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4143 | "yfunc\377", | |
4144 | ||
4145 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4146 | "\377", | |
4147 | "\377\377123", | |
4148 | ||
c62446b1 PA |
4149 | /* A name with all sorts of complications. Starts with "z" to make |
4150 | it easier for the completion tests below. */ | |
4151 | #define Z_SYM_NAME \ | |
4152 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4153 | "::tuple<(anonymous namespace)::ui*, " \ | |
4154 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4155 | ||
4156 | Z_SYM_NAME | |
4157 | }; | |
4158 | ||
a3c5fafd PA |
4159 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4160 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4161 | in completion mode. */ | |
5c58de74 PA |
4162 | |
4163 | static bool | |
a3c5fafd | 4164 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4165 | const char *search_name, |
4166 | gdb::array_view<const char *> expected_syms) | |
4167 | { | |
4168 | lookup_name_info lookup_name (search_name, | |
4169 | symbol_name_match_type::FULL, true); | |
4170 | ||
3b00ef10 TT |
4171 | auto bounds = index.find_name_components_bounds (lookup_name, |
4172 | language_cplus); | |
5c58de74 PA |
4173 | |
4174 | size_t distance = std::distance (bounds.first, bounds.second); | |
4175 | if (distance != expected_syms.size ()) | |
4176 | return false; | |
4177 | ||
4178 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4179 | { | |
4180 | auto nc_elem = bounds.first + exp_elem; | |
4181 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4182 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4183 | return false; | |
4184 | } | |
4185 | ||
4186 | return true; | |
4187 | } | |
4188 | ||
4189 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4190 | method. */ | |
4191 | ||
c62446b1 | 4192 | static void |
5c58de74 PA |
4193 | test_mapped_index_find_name_component_bounds () |
4194 | { | |
4195 | mock_mapped_index mock_index (test_symbols); | |
4196 | ||
a3c5fafd | 4197 | mock_index.build_name_components (); |
5c58de74 PA |
4198 | |
4199 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4200 | method in completion mode. */ | |
4201 | { | |
4202 | static const char *expected_syms[] = { | |
4203 | "t1_func", | |
4204 | "t1_func1", | |
5c58de74 PA |
4205 | }; |
4206 | ||
a3c5fafd | 4207 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4208 | "t1_func", expected_syms)); |
4209 | } | |
4210 | ||
4211 | /* Check that the increment-last-char in the name matching algorithm | |
4212 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4213 | { | |
4214 | static const char *expected_syms1[] = { | |
4215 | "\377", | |
4216 | "\377\377123", | |
4217 | }; | |
a3c5fafd | 4218 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4219 | "\377", expected_syms1)); |
4220 | ||
4221 | static const char *expected_syms2[] = { | |
4222 | "\377\377123", | |
4223 | }; | |
a3c5fafd | 4224 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4225 | "\377\377", expected_syms2)); |
4226 | } | |
4227 | } | |
4228 | ||
4229 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4230 | ||
4231 | static void | |
4232 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4233 | { |
4234 | mock_mapped_index mock_index (test_symbols); | |
4235 | ||
4236 | /* We let all tests run until the end even if some fails, for debug | |
4237 | convenience. */ | |
4238 | bool any_mismatch = false; | |
4239 | ||
4240 | /* Create the expected symbols list (an initializer_list). Needed | |
4241 | because lists have commas, and we need to pass them to CHECK, | |
4242 | which is a macro. */ | |
4243 | #define EXPECT(...) { __VA_ARGS__ } | |
4244 | ||
4245 | /* Wrapper for check_match that passes down the current | |
4246 | __FILE__/__LINE__. */ | |
4247 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4248 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4249 | mock_index, \ | |
4250 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4251 | EXPECTED_LIST) | |
4252 | ||
4253 | /* Identity checks. */ | |
4254 | for (const char *sym : test_symbols) | |
4255 | { | |
4256 | /* Should be able to match all existing symbols. */ | |
4257 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4258 | EXPECT (sym)); | |
4259 | ||
4260 | /* Should be able to match all existing symbols with | |
4261 | parameters. */ | |
4262 | std::string with_params = std::string (sym) + "(int)"; | |
4263 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4264 | EXPECT (sym)); | |
4265 | ||
4266 | /* Should be able to match all existing symbols with | |
4267 | parameters and qualifiers. */ | |
4268 | with_params = std::string (sym) + " ( int ) const"; | |
4269 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4270 | EXPECT (sym)); | |
4271 | ||
4272 | /* This should really find sym, but cp-name-parser.y doesn't | |
4273 | know about lvalue/rvalue qualifiers yet. */ | |
4274 | with_params = std::string (sym) + " ( int ) &&"; | |
4275 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4276 | {}); | |
4277 | } | |
4278 | ||
e1ef7d7a PA |
4279 | /* Check that the name matching algorithm for completion doesn't get |
4280 | confused with Latin1 'ÿ' / 0xff. */ | |
4281 | { | |
4282 | static const char str[] = "\377"; | |
4283 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4284 | EXPECT ("\377", "\377\377123")); | |
4285 | } | |
4286 | ||
4287 | /* Check that the increment-last-char in the matching algorithm for | |
4288 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4289 | { | |
4290 | static const char str[] = "t1_func"; | |
4291 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4292 | EXPECT ("t1_func", "t1_func1")); | |
4293 | } | |
4294 | ||
c62446b1 PA |
4295 | /* Check that completion mode works at each prefix of the expected |
4296 | symbol name. */ | |
4297 | { | |
4298 | static const char str[] = "function(int)"; | |
4299 | size_t len = strlen (str); | |
4300 | std::string lookup; | |
4301 | ||
4302 | for (size_t i = 1; i < len; i++) | |
4303 | { | |
4304 | lookup.assign (str, i); | |
4305 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4306 | EXPECT ("function")); | |
4307 | } | |
4308 | } | |
4309 | ||
4310 | /* While "w" is a prefix of both components, the match function | |
4311 | should still only be called once. */ | |
4312 | { | |
4313 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4314 | EXPECT ("w1::w2")); | |
a20714ff PA |
4315 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4316 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4317 | } |
4318 | ||
4319 | /* Same, with a "complicated" symbol. */ | |
4320 | { | |
4321 | static const char str[] = Z_SYM_NAME; | |
4322 | size_t len = strlen (str); | |
4323 | std::string lookup; | |
4324 | ||
4325 | for (size_t i = 1; i < len; i++) | |
4326 | { | |
4327 | lookup.assign (str, i); | |
4328 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4329 | EXPECT (Z_SYM_NAME)); | |
4330 | } | |
4331 | } | |
4332 | ||
4333 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4334 | { | |
4335 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4336 | {}); | |
4337 | } | |
4338 | ||
4339 | /* A complete symbol with parameters matches any overload, since the | |
4340 | index has no overload info. */ | |
4341 | { | |
4342 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4343 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4344 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4345 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4346 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4347 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4348 | } |
4349 | ||
4350 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4351 | template argument list. */ | |
4352 | { | |
4353 | static const char expected[] = "ns::foo<int>"; | |
4354 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4355 | EXPECT (expected)); | |
a20714ff PA |
4356 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4357 | EXPECT (expected)); | |
c62446b1 PA |
4358 | } |
4359 | ||
4360 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4361 | template argument list that includes a pointer. */ | |
4362 | { | |
4363 | static const char expected[] = "ns::foo<char*>"; | |
4364 | /* Try both completion and non-completion modes. */ | |
4365 | static const bool completion_mode[2] = {false, true}; | |
4366 | for (size_t i = 0; i < 2; i++) | |
4367 | { | |
4368 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4369 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4370 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4371 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4372 | |
4373 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4374 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4375 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4376 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4377 | } |
4378 | } | |
4379 | ||
4380 | { | |
4381 | /* Check method qualifiers are ignored. */ | |
4382 | static const char expected[] = "ns::foo<char*>"; | |
4383 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4384 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4385 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4386 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4387 | CHECK_MATCH ("foo < char * > ( int ) const", |
4388 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4389 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4390 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4391 | } |
4392 | ||
4393 | /* Test lookup names that don't match anything. */ | |
4394 | { | |
a20714ff PA |
4395 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4396 | {}); | |
4397 | ||
c62446b1 PA |
4398 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4399 | {}); | |
4400 | } | |
4401 | ||
a20714ff PA |
4402 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4403 | which should not be confused with a parameter list. */ | |
4404 | { | |
4405 | static const char *syms[] = { | |
4406 | "A::B::C", | |
4407 | "B::C", | |
4408 | "C", | |
4409 | "A :: B :: C ( int )", | |
4410 | "B :: C ( int )", | |
4411 | "C ( int )", | |
4412 | }; | |
4413 | ||
4414 | for (const char *s : syms) | |
4415 | { | |
4416 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4417 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4418 | } | |
4419 | } | |
4420 | ||
4421 | { | |
4422 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4423 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4424 | EXPECT (expected)); | |
4425 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4426 | EXPECT (expected)); | |
4427 | } | |
4428 | ||
c62446b1 PA |
4429 | SELF_CHECK (!any_mismatch); |
4430 | ||
4431 | #undef EXPECT | |
4432 | #undef CHECK_MATCH | |
4433 | } | |
4434 | ||
5c58de74 PA |
4435 | static void |
4436 | run_test () | |
4437 | { | |
4438 | test_mapped_index_find_name_component_bounds (); | |
4439 | test_dw2_expand_symtabs_matching_symbol (); | |
4440 | } | |
4441 | ||
c62446b1 PA |
4442 | }} // namespace selftests::dw2_expand_symtabs_matching |
4443 | ||
4444 | #endif /* GDB_SELF_TEST */ | |
4445 | ||
4b514bc8 JK |
4446 | /* If FILE_MATCHER is NULL or if PER_CU has |
4447 | dwarf2_per_cu_quick_data::MARK set (see | |
4448 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4449 | EXPANSION_NOTIFY on it. */ | |
4450 | ||
4451 | static void | |
4452 | dw2_expand_symtabs_matching_one | |
4453 | (struct dwarf2_per_cu_data *per_cu, | |
4454 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4455 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4456 | { | |
4457 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4458 | { | |
4459 | bool symtab_was_null | |
4460 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4461 | ||
58f0c718 | 4462 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4463 | |
4464 | if (expansion_notify != NULL | |
4465 | && symtab_was_null | |
4466 | && per_cu->v.quick->compunit_symtab != NULL) | |
4467 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4468 | } | |
4469 | } | |
4470 | ||
3f563c84 PA |
4471 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4472 | matched, to expand corresponding CUs that were marked. IDX is the | |
4473 | index of the symbol name that matched. */ | |
4474 | ||
4475 | static void | |
4476 | dw2_expand_marked_cus | |
ed2dc618 | 4477 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
4478 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4479 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4480 | search_domain kind) | |
4481 | { | |
3f563c84 PA |
4482 | offset_type *vec, vec_len, vec_idx; |
4483 | bool global_seen = false; | |
ed2dc618 | 4484 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 4485 | |
61920122 | 4486 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 4487 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
4488 | vec_len = MAYBE_SWAP (vec[0]); |
4489 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4490 | { | |
61920122 PA |
4491 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
4492 | /* This value is only valid for index versions >= 7. */ | |
4493 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4494 | gdb_index_symbol_kind symbol_kind = | |
4495 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4496 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4497 | /* Only check the symbol attributes if they're present. | |
4498 | Indices prior to version 7 don't record them, | |
4499 | and indices >= 7 may elide them for certain symbols | |
4500 | (gold does this). */ | |
4501 | int attrs_valid = | |
4502 | (index.version >= 7 | |
4503 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4504 | ||
4505 | /* Work around gold/15646. */ | |
4506 | if (attrs_valid) | |
9291a0cd | 4507 | { |
61920122 PA |
4508 | if (!is_static && global_seen) |
4509 | continue; | |
4510 | if (!is_static) | |
4511 | global_seen = true; | |
4512 | } | |
3190f0c6 | 4513 | |
61920122 PA |
4514 | /* Only check the symbol's kind if it has one. */ |
4515 | if (attrs_valid) | |
4516 | { | |
4517 | switch (kind) | |
8943b874 | 4518 | { |
61920122 PA |
4519 | case VARIABLES_DOMAIN: |
4520 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4521 | continue; | |
4522 | break; | |
4523 | case FUNCTIONS_DOMAIN: | |
4524 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4525 | continue; |
61920122 PA |
4526 | break; |
4527 | case TYPES_DOMAIN: | |
4528 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4529 | continue; | |
4530 | break; | |
59c35742 AB |
4531 | case MODULES_DOMAIN: |
4532 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4533 | continue; | |
4534 | break; | |
61920122 PA |
4535 | default: |
4536 | break; | |
8943b874 | 4537 | } |
61920122 | 4538 | } |
8943b874 | 4539 | |
61920122 | 4540 | /* Don't crash on bad data. */ |
b76e467d | 4541 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4542 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 4543 | { |
b98664d3 | 4544 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
4545 | " [in module %s]"), |
4546 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
4547 | continue; |
4548 | } | |
4549 | ||
ff4c9fec | 4550 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
4551 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
4552 | expansion_notify); | |
61920122 PA |
4553 | } |
4554 | } | |
4555 | ||
4b514bc8 JK |
4556 | /* If FILE_MATCHER is non-NULL, set all the |
4557 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4558 | that match FILE_MATCHER. */ | |
4559 | ||
61920122 | 4560 | static void |
4b514bc8 | 4561 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
4562 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4563 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 4564 | { |
4b514bc8 | 4565 | if (file_matcher == NULL) |
61920122 PA |
4566 | return; |
4567 | ||
4b514bc8 JK |
4568 | objfile *const objfile = dwarf2_per_objfile->objfile; |
4569 | ||
4570 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4571 | htab_eq_pointer, | |
4572 | NULL, xcalloc, xfree)); | |
4573 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4574 | htab_eq_pointer, |
4575 | NULL, xcalloc, xfree)); | |
61920122 | 4576 | |
4b514bc8 JK |
4577 | /* The rule is CUs specify all the files, including those used by |
4578 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4579 | |
b76e467d | 4580 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4581 | { |
927aa2e7 JK |
4582 | QUIT; |
4583 | ||
4584 | per_cu->v.quick->mark = 0; | |
4585 | ||
4586 | /* We only need to look at symtabs not already expanded. */ | |
4587 | if (per_cu->v.quick->compunit_symtab) | |
4588 | continue; | |
4589 | ||
b76e467d | 4590 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4591 | if (file_data == NULL) |
4592 | continue; | |
4593 | ||
4594 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4595 | continue; | |
4596 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4597 | { | |
4598 | per_cu->v.quick->mark = 1; | |
4599 | continue; | |
4600 | } | |
4601 | ||
b76e467d | 4602 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4603 | { |
4604 | const char *this_real_name; | |
4605 | ||
4606 | if (file_matcher (file_data->file_names[j], false)) | |
4607 | { | |
4608 | per_cu->v.quick->mark = 1; | |
4609 | break; | |
4610 | } | |
4611 | ||
4612 | /* Before we invoke realpath, which can get expensive when many | |
4613 | files are involved, do a quick comparison of the basenames. */ | |
4614 | if (!basenames_may_differ | |
4615 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4616 | true)) | |
4617 | continue; | |
4618 | ||
4619 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4620 | if (file_matcher (this_real_name, false)) | |
4621 | { | |
4622 | per_cu->v.quick->mark = 1; | |
4623 | break; | |
4624 | } | |
4625 | } | |
4626 | ||
b76e467d SM |
4627 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4628 | ? visited_found.get () | |
4629 | : visited_not_found.get (), | |
4630 | file_data, INSERT); | |
927aa2e7 JK |
4631 | *slot = file_data; |
4632 | } | |
4633 | } | |
4634 | ||
4635 | static void | |
4636 | dw2_expand_symtabs_matching | |
4637 | (struct objfile *objfile, | |
4638 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4639 | const lookup_name_info &lookup_name, | |
4640 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4641 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4642 | enum search_domain kind) | |
4643 | { | |
ed2dc618 SM |
4644 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4645 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4646 | |
4647 | /* index_table is NULL if OBJF_READNOW. */ | |
4648 | if (!dwarf2_per_objfile->index_table) | |
4649 | return; | |
4650 | ||
ed2dc618 | 4651 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
4652 | |
4653 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
4654 | ||
4655 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
4656 | symbol_matcher, | |
4657 | kind, [&] (offset_type idx) | |
4658 | { | |
ed2dc618 | 4659 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 4660 | expansion_notify, kind); |
3b00ef10 | 4661 | return true; |
927aa2e7 JK |
4662 | }); |
4663 | } | |
4664 | ||
4665 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4666 | symtab. */ | |
4667 | ||
4668 | static struct compunit_symtab * | |
4669 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4670 | CORE_ADDR pc) | |
4671 | { | |
4672 | int i; | |
4673 | ||
4674 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4675 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4676 | return cust; | |
4677 | ||
4678 | if (cust->includes == NULL) | |
4679 | return NULL; | |
4680 | ||
4681 | for (i = 0; cust->includes[i]; ++i) | |
4682 | { | |
4683 | struct compunit_symtab *s = cust->includes[i]; | |
4684 | ||
4685 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4686 | if (s != NULL) | |
4687 | return s; | |
4688 | } | |
4689 | ||
4690 | return NULL; | |
4691 | } | |
4692 | ||
4693 | static struct compunit_symtab * | |
4694 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4695 | struct bound_minimal_symbol msymbol, | |
4696 | CORE_ADDR pc, | |
4697 | struct obj_section *section, | |
4698 | int warn_if_readin) | |
4699 | { | |
4700 | struct dwarf2_per_cu_data *data; | |
4701 | struct compunit_symtab *result; | |
4702 | ||
d320c2b5 | 4703 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
4704 | return NULL; |
4705 | ||
b3b3bada | 4706 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
d320c2b5 TT |
4707 | data = (struct dwarf2_per_cu_data *) addrmap_find |
4708 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
4709 | if (!data) |
4710 | return NULL; | |
4711 | ||
4712 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
4713 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
4714 | paddress (get_objfile_arch (objfile), pc)); | |
4715 | ||
4716 | result | |
58f0c718 TT |
4717 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
4718 | false), | |
927aa2e7 JK |
4719 | pc); |
4720 | gdb_assert (result != NULL); | |
4721 | return result; | |
4722 | } | |
4723 | ||
4724 | static void | |
4725 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
4726 | void *data, int need_fullname) | |
4727 | { | |
ed2dc618 SM |
4728 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4729 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4730 | |
4731 | if (!dwarf2_per_objfile->filenames_cache) | |
4732 | { | |
4733 | dwarf2_per_objfile->filenames_cache.emplace (); | |
4734 | ||
4735 | htab_up visited (htab_create_alloc (10, | |
4736 | htab_hash_pointer, htab_eq_pointer, | |
4737 | NULL, xcalloc, xfree)); | |
4738 | ||
4739 | /* The rule is CUs specify all the files, including those used | |
4740 | by any TU, so there's no need to scan TUs here. We can | |
4741 | ignore file names coming from already-expanded CUs. */ | |
4742 | ||
b76e467d | 4743 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4744 | { |
927aa2e7 JK |
4745 | if (per_cu->v.quick->compunit_symtab) |
4746 | { | |
4747 | void **slot = htab_find_slot (visited.get (), | |
4748 | per_cu->v.quick->file_names, | |
4749 | INSERT); | |
4750 | ||
4751 | *slot = per_cu->v.quick->file_names; | |
4752 | } | |
4753 | } | |
4754 | ||
b76e467d | 4755 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4756 | { |
927aa2e7 JK |
4757 | /* We only need to look at symtabs not already expanded. */ |
4758 | if (per_cu->v.quick->compunit_symtab) | |
4759 | continue; | |
4760 | ||
b76e467d | 4761 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4762 | if (file_data == NULL) |
4763 | continue; | |
4764 | ||
b76e467d | 4765 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
4766 | if (*slot) |
4767 | { | |
4768 | /* Already visited. */ | |
4769 | continue; | |
4770 | } | |
4771 | *slot = file_data; | |
4772 | ||
4773 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4774 | { | |
4775 | const char *filename = file_data->file_names[j]; | |
4776 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4777 | } | |
4778 | } | |
4779 | } | |
4780 | ||
4781 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4782 | { | |
4783 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4784 | ||
4785 | if (need_fullname) | |
4786 | this_real_name = gdb_realpath (filename); | |
4787 | (*fun) (filename, this_real_name.get (), data); | |
4788 | }); | |
4789 | } | |
4790 | ||
4791 | static int | |
4792 | dw2_has_symbols (struct objfile *objfile) | |
4793 | { | |
4794 | return 1; | |
4795 | } | |
4796 | ||
4797 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4798 | { | |
4799 | dw2_has_symbols, | |
4800 | dw2_find_last_source_symtab, | |
4801 | dw2_forget_cached_source_info, | |
4802 | dw2_map_symtabs_matching_filename, | |
4803 | dw2_lookup_symbol, | |
4804 | dw2_print_stats, | |
4805 | dw2_dump, | |
927aa2e7 JK |
4806 | dw2_expand_symtabs_for_function, |
4807 | dw2_expand_all_symtabs, | |
4808 | dw2_expand_symtabs_with_fullname, | |
4809 | dw2_map_matching_symbols, | |
4810 | dw2_expand_symtabs_matching, | |
4811 | dw2_find_pc_sect_compunit_symtab, | |
4812 | NULL, | |
4813 | dw2_map_symbol_filenames | |
4814 | }; | |
4815 | ||
4816 | /* DWARF-5 debug_names reader. */ | |
4817 | ||
4818 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4819 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4820 | ||
4821 | /* A helper function that reads the .debug_names section in SECTION | |
4822 | and fills in MAP. FILENAME is the name of the file containing the | |
4823 | section; it is used for error reporting. | |
4824 | ||
4825 | Returns true if all went well, false otherwise. */ | |
4826 | ||
4827 | static bool | |
4828 | read_debug_names_from_section (struct objfile *objfile, | |
4829 | const char *filename, | |
4830 | struct dwarf2_section_info *section, | |
4831 | mapped_debug_names &map) | |
4832 | { | |
96b79293 | 4833 | if (section->empty ()) |
927aa2e7 JK |
4834 | return false; |
4835 | ||
4836 | /* Older elfutils strip versions could keep the section in the main | |
4837 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4838 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4839 | return false; |
4840 | ||
96b79293 | 4841 | section->read (objfile); |
927aa2e7 JK |
4842 | |
4843 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
4844 | ||
4845 | const gdb_byte *addr = section->buffer; | |
4846 | ||
96b79293 | 4847 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4848 | |
4849 | unsigned int bytes_read; | |
4850 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4851 | addr += bytes_read; | |
4852 | ||
4853 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4854 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4855 | if (bytes_read + length != section->size) | |
4856 | { | |
4857 | /* There may be multiple per-CU indices. */ | |
4858 | warning (_("Section .debug_names in %s length %s does not match " | |
4859 | "section length %s, ignoring .debug_names."), | |
4860 | filename, plongest (bytes_read + length), | |
4861 | pulongest (section->size)); | |
4862 | return false; | |
4863 | } | |
4864 | ||
4865 | /* The version number. */ | |
4866 | uint16_t version = read_2_bytes (abfd, addr); | |
4867 | addr += 2; | |
4868 | if (version != 5) | |
4869 | { | |
4870 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4871 | "ignoring .debug_names."), | |
4872 | filename, version); | |
4873 | return false; | |
4874 | } | |
4875 | ||
4876 | /* Padding. */ | |
4877 | uint16_t padding = read_2_bytes (abfd, addr); | |
4878 | addr += 2; | |
4879 | if (padding != 0) | |
4880 | { | |
4881 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4882 | "ignoring .debug_names."), | |
4883 | filename, padding); | |
4884 | return false; | |
4885 | } | |
4886 | ||
4887 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4888 | map.cu_count = read_4_bytes (abfd, addr); | |
4889 | addr += 4; | |
4890 | ||
4891 | /* local_type_unit_count - The number of TUs in the local TU | |
4892 | list. */ | |
4893 | map.tu_count = read_4_bytes (abfd, addr); | |
4894 | addr += 4; | |
4895 | ||
4896 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4897 | list. */ | |
4898 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4899 | addr += 4; | |
4900 | if (foreign_tu_count != 0) | |
4901 | { | |
4902 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4903 | "ignoring .debug_names."), | |
4904 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4905 | return false; | |
4906 | } | |
4907 | ||
4908 | /* bucket_count - The number of hash buckets in the hash lookup | |
4909 | table. */ | |
4910 | map.bucket_count = read_4_bytes (abfd, addr); | |
4911 | addr += 4; | |
4912 | ||
4913 | /* name_count - The number of unique names in the index. */ | |
4914 | map.name_count = read_4_bytes (abfd, addr); | |
4915 | addr += 4; | |
4916 | ||
4917 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4918 | table. */ | |
4919 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4920 | addr += 4; | |
4921 | ||
4922 | /* augmentation_string_size - The size in bytes of the augmentation | |
4923 | string. This value is rounded up to a multiple of 4. */ | |
4924 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4925 | addr += 4; | |
4926 | map.augmentation_is_gdb = ((augmentation_string_size | |
4927 | == sizeof (dwarf5_augmentation)) | |
4928 | && memcmp (addr, dwarf5_augmentation, | |
4929 | sizeof (dwarf5_augmentation)) == 0); | |
4930 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4931 | addr += augmentation_string_size; | |
4932 | ||
4933 | /* List of CUs */ | |
4934 | map.cu_table_reordered = addr; | |
4935 | addr += map.cu_count * map.offset_size; | |
4936 | ||
4937 | /* List of Local TUs */ | |
4938 | map.tu_table_reordered = addr; | |
4939 | addr += map.tu_count * map.offset_size; | |
4940 | ||
4941 | /* Hash Lookup Table */ | |
4942 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4943 | addr += map.bucket_count * 4; | |
4944 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4945 | addr += map.name_count * 4; | |
4946 | ||
4947 | /* Name Table */ | |
4948 | map.name_table_string_offs_reordered = addr; | |
4949 | addr += map.name_count * map.offset_size; | |
4950 | map.name_table_entry_offs_reordered = addr; | |
4951 | addr += map.name_count * map.offset_size; | |
4952 | ||
4953 | const gdb_byte *abbrev_table_start = addr; | |
4954 | for (;;) | |
4955 | { | |
927aa2e7 JK |
4956 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4957 | addr += bytes_read; | |
4958 | if (index_num == 0) | |
4959 | break; | |
4960 | ||
4961 | const auto insertpair | |
4962 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4963 | if (!insertpair.second) | |
4964 | { | |
4965 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4966 | "ignoring .debug_names."), | |
4967 | filename, pulongest (index_num)); | |
4968 | return false; | |
4969 | } | |
4970 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4971 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4972 | addr += bytes_read; | |
4973 | ||
4974 | for (;;) | |
4975 | { | |
4976 | mapped_debug_names::index_val::attr attr; | |
4977 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4978 | addr += bytes_read; | |
4979 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4980 | addr += bytes_read; | |
4981 | if (attr.form == DW_FORM_implicit_const) | |
4982 | { | |
4983 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4984 | &bytes_read); | |
4985 | addr += bytes_read; | |
4986 | } | |
4987 | if (attr.dw_idx == 0 && attr.form == 0) | |
4988 | break; | |
4989 | indexval.attr_vec.push_back (std::move (attr)); | |
4990 | } | |
4991 | } | |
4992 | if (addr != abbrev_table_start + abbrev_table_size) | |
4993 | { | |
4994 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
4995 | "of size %s vs. written as %u, ignoring .debug_names."), |
4996 | filename, plongest (addr - abbrev_table_start), | |
4997 | abbrev_table_size); | |
927aa2e7 JK |
4998 | return false; |
4999 | } | |
5000 | map.entry_pool = addr; | |
5001 | ||
5002 | return true; | |
5003 | } | |
5004 | ||
5005 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5006 | list. */ | |
5007 | ||
5008 | static void | |
ed2dc618 | 5009 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5010 | const mapped_debug_names &map, |
5011 | dwarf2_section_info §ion, | |
b76e467d | 5012 | bool is_dwz) |
927aa2e7 JK |
5013 | { |
5014 | sect_offset sect_off_prev; | |
5015 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5016 | { | |
5017 | sect_offset sect_off_next; | |
5018 | if (i < map.cu_count) | |
5019 | { | |
5020 | sect_off_next | |
5021 | = (sect_offset) (extract_unsigned_integer | |
5022 | (map.cu_table_reordered + i * map.offset_size, | |
5023 | map.offset_size, | |
5024 | map.dwarf5_byte_order)); | |
5025 | } | |
5026 | else | |
5027 | sect_off_next = (sect_offset) section.size; | |
5028 | if (i >= 1) | |
5029 | { | |
5030 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5031 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5032 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5033 | sect_off_prev, length); |
b76e467d | 5034 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5035 | } |
5036 | sect_off_prev = sect_off_next; | |
5037 | } | |
5038 | } | |
5039 | ||
5040 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5041 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5042 | |
5043 | static void | |
ed2dc618 | 5044 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5045 | const mapped_debug_names &map, |
5046 | const mapped_debug_names &dwz_map) | |
5047 | { | |
b76e467d SM |
5048 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5049 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5050 | |
ed2dc618 SM |
5051 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5052 | dwarf2_per_objfile->info, | |
b76e467d | 5053 | false /* is_dwz */); |
927aa2e7 JK |
5054 | |
5055 | if (dwz_map.cu_count == 0) | |
5056 | return; | |
5057 | ||
ed2dc618 SM |
5058 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5059 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5060 | true /* is_dwz */); |
927aa2e7 JK |
5061 | } |
5062 | ||
5063 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5064 | elements of all the CUs and return true. Otherwise, return false. */ | |
5065 | ||
5066 | static bool | |
ed2dc618 | 5067 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5068 | { |
22ca247e TT |
5069 | std::unique_ptr<mapped_debug_names> map |
5070 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5071 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5072 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5073 | |
5074 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5075 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5076 | *map)) |
927aa2e7 JK |
5077 | return false; |
5078 | ||
5079 | /* Don't use the index if it's empty. */ | |
22ca247e | 5080 | if (map->name_count == 0) |
927aa2e7 JK |
5081 | return false; |
5082 | ||
5083 | /* If there is a .dwz file, read it so we can get its CU list as | |
5084 | well. */ | |
ed2dc618 | 5085 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5086 | if (dwz != NULL) |
5087 | { | |
5088 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5089 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5090 | &dwz->debug_names, dwz_map)) |
5091 | { | |
5092 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5093 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5094 | return false; |
5095 | } | |
5096 | } | |
5097 | ||
22ca247e | 5098 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5099 | |
22ca247e | 5100 | if (map->tu_count != 0) |
927aa2e7 JK |
5101 | { |
5102 | /* We can only handle a single .debug_types when we have an | |
5103 | index. */ | |
fd5866f6 | 5104 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5105 | return false; |
5106 | ||
fd5866f6 | 5107 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5108 | |
5109 | create_signatured_type_table_from_debug_names | |
22ca247e | 5110 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5111 | } |
5112 | ||
ed2dc618 SM |
5113 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5114 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5115 | |
22ca247e | 5116 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5117 | dwarf2_per_objfile->using_index = 1; |
5118 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5119 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5120 | |
5121 | return true; | |
5122 | } | |
5123 | ||
927aa2e7 JK |
5124 | /* Type used to manage iterating over all CUs looking for a symbol for |
5125 | .debug_names. */ | |
5126 | ||
5127 | class dw2_debug_names_iterator | |
5128 | { | |
5129 | public: | |
927aa2e7 | 5130 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5131 | gdb::optional<block_enum> block_index, |
5132 | domain_enum domain, | |
927aa2e7 | 5133 | const char *name) |
2b79f376 | 5134 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5135 | m_addr (find_vec_in_debug_names (map, name)) |
5136 | {} | |
5137 | ||
5138 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5139 | search_domain search, uint32_t namei) | |
5140 | : m_map (map), | |
5141 | m_search (search), | |
5142 | m_addr (find_vec_in_debug_names (map, namei)) | |
5143 | {} | |
5144 | ||
3b00ef10 TT |
5145 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5146 | block_enum block_index, domain_enum domain, | |
5147 | uint32_t namei) | |
5148 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5149 | m_addr (find_vec_in_debug_names (map, namei)) | |
5150 | {} | |
5151 | ||
927aa2e7 JK |
5152 | /* Return the next matching CU or NULL if there are no more. */ |
5153 | dwarf2_per_cu_data *next (); | |
5154 | ||
5155 | private: | |
5156 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5157 | const char *name); | |
5158 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5159 | uint32_t namei); | |
5160 | ||
5161 | /* The internalized form of .debug_names. */ | |
5162 | const mapped_debug_names &m_map; | |
5163 | ||
2b79f376 SM |
5164 | /* If set, only look for symbols that match that block. Valid values are |
5165 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5166 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5167 | |
5168 | /* The kind of symbol we're looking for. */ | |
5169 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5170 | const search_domain m_search = ALL_DOMAIN; | |
5171 | ||
5172 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5173 | not found. */ | |
5174 | const gdb_byte *m_addr; | |
5175 | }; | |
5176 | ||
5177 | const char * | |
5178 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5179 | { | |
5180 | const ULONGEST namei_string_offs | |
5181 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5182 | + namei * offset_size), | |
5183 | offset_size, | |
5184 | dwarf5_byte_order); | |
5185 | return read_indirect_string_at_offset | |
ed2dc618 | 5186 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5187 | } |
5188 | ||
5189 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5190 | found, return pointer to its pool data. If NAME cannot be found, | |
5191 | return NULL. */ | |
5192 | ||
5193 | const gdb_byte * | |
5194 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5195 | (const mapped_debug_names &map, const char *name) | |
5196 | { | |
5197 | int (*cmp) (const char *, const char *); | |
5198 | ||
54ee4252 | 5199 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5200 | if (current_language->la_language == language_cplus |
5201 | || current_language->la_language == language_fortran | |
5202 | || current_language->la_language == language_d) | |
5203 | { | |
5204 | /* NAME is already canonical. Drop any qualifiers as | |
5205 | .debug_names does not contain any. */ | |
5206 | ||
5207 | if (strchr (name, '(') != NULL) | |
5208 | { | |
54ee4252 | 5209 | without_params = cp_remove_params (name); |
927aa2e7 | 5210 | if (without_params != NULL) |
54ee4252 | 5211 | name = without_params.get (); |
927aa2e7 JK |
5212 | } |
5213 | } | |
5214 | ||
5215 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5216 | ||
5217 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5218 | uint32_t namei | |
5219 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5220 | (map.bucket_table_reordered | |
5221 | + (full_hash % map.bucket_count)), 4, | |
5222 | map.dwarf5_byte_order); | |
5223 | if (namei == 0) | |
5224 | return NULL; | |
5225 | --namei; | |
5226 | if (namei >= map.name_count) | |
5227 | { | |
b98664d3 | 5228 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5229 | "[in module %s]"), |
5230 | namei, map.name_count, | |
ed2dc618 | 5231 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5232 | return NULL; |
5233 | } | |
5234 | ||
5235 | for (;;) | |
5236 | { | |
5237 | const uint32_t namei_full_hash | |
5238 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5239 | (map.hash_table_reordered + namei), 4, | |
5240 | map.dwarf5_byte_order); | |
5241 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5242 | return NULL; | |
5243 | ||
5244 | if (full_hash == namei_full_hash) | |
5245 | { | |
5246 | const char *const namei_string = map.namei_to_name (namei); | |
5247 | ||
5248 | #if 0 /* An expensive sanity check. */ | |
5249 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5250 | { | |
b98664d3 | 5251 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5252 | "[in module %s]"), |
5253 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5254 | return NULL; | |
5255 | } | |
5256 | #endif | |
5257 | ||
5258 | if (cmp (namei_string, name) == 0) | |
5259 | { | |
5260 | const ULONGEST namei_entry_offs | |
5261 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5262 | + namei * map.offset_size), | |
5263 | map.offset_size, map.dwarf5_byte_order); | |
5264 | return map.entry_pool + namei_entry_offs; | |
5265 | } | |
5266 | } | |
5267 | ||
5268 | ++namei; | |
5269 | if (namei >= map.name_count) | |
5270 | return NULL; | |
5271 | } | |
5272 | } | |
5273 | ||
5274 | const gdb_byte * | |
5275 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5276 | (const mapped_debug_names &map, uint32_t namei) | |
5277 | { | |
5278 | if (namei >= map.name_count) | |
5279 | { | |
b98664d3 | 5280 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5281 | "[in module %s]"), |
5282 | namei, map.name_count, | |
ed2dc618 | 5283 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5284 | return NULL; |
5285 | } | |
5286 | ||
5287 | const ULONGEST namei_entry_offs | |
5288 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5289 | + namei * map.offset_size), | |
5290 | map.offset_size, map.dwarf5_byte_order); | |
5291 | return map.entry_pool + namei_entry_offs; | |
5292 | } | |
5293 | ||
5294 | /* See dw2_debug_names_iterator. */ | |
5295 | ||
5296 | dwarf2_per_cu_data * | |
5297 | dw2_debug_names_iterator::next () | |
5298 | { | |
5299 | if (m_addr == NULL) | |
5300 | return NULL; | |
5301 | ||
ed2dc618 SM |
5302 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5303 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5304 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5305 | |
5306 | again: | |
5307 | ||
5308 | unsigned int bytes_read; | |
5309 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5310 | m_addr += bytes_read; | |
5311 | if (abbrev == 0) | |
5312 | return NULL; | |
5313 | ||
5314 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5315 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5316 | { | |
b98664d3 | 5317 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5318 | "[in module %s]"), |
ed2dc618 | 5319 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5320 | return NULL; |
5321 | } | |
5322 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5323 | enum class symbol_linkage { |
5324 | unknown, | |
5325 | static_, | |
5326 | extern_, | |
23c13d42 | 5327 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5328 | dwarf2_per_cu_data *per_cu = NULL; |
5329 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5330 | { | |
5331 | ULONGEST ull; | |
5332 | switch (attr.form) | |
5333 | { | |
5334 | case DW_FORM_implicit_const: | |
5335 | ull = attr.implicit_const; | |
5336 | break; | |
5337 | case DW_FORM_flag_present: | |
5338 | ull = 1; | |
5339 | break; | |
5340 | case DW_FORM_udata: | |
5341 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5342 | m_addr += bytes_read; | |
5343 | break; | |
5344 | default: | |
b98664d3 | 5345 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5346 | dwarf_form_name (attr.form), |
ed2dc618 | 5347 | objfile_name (objfile)); |
927aa2e7 JK |
5348 | return NULL; |
5349 | } | |
5350 | switch (attr.dw_idx) | |
5351 | { | |
5352 | case DW_IDX_compile_unit: | |
5353 | /* Don't crash on bad data. */ | |
b76e467d | 5354 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5355 | { |
b98664d3 | 5356 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5357 | " [in module %s]"), |
5358 | pulongest (ull), | |
5359 | objfile_name (dwarf2_per_objfile->objfile)); | |
5360 | continue; | |
5361 | } | |
ff4c9fec | 5362 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5363 | break; |
8af5c486 JK |
5364 | case DW_IDX_type_unit: |
5365 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5366 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5367 | { |
b98664d3 | 5368 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5369 | " [in module %s]"), |
5370 | pulongest (ull), | |
5371 | objfile_name (dwarf2_per_objfile->objfile)); | |
5372 | continue; | |
5373 | } | |
ff4c9fec | 5374 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5375 | break; |
927aa2e7 JK |
5376 | case DW_IDX_GNU_internal: |
5377 | if (!m_map.augmentation_is_gdb) | |
5378 | break; | |
23c13d42 | 5379 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5380 | break; |
5381 | case DW_IDX_GNU_external: | |
5382 | if (!m_map.augmentation_is_gdb) | |
5383 | break; | |
23c13d42 | 5384 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5385 | break; |
5386 | } | |
5387 | } | |
5388 | ||
5389 | /* Skip if already read in. */ | |
5390 | if (per_cu->v.quick->compunit_symtab) | |
5391 | goto again; | |
5392 | ||
5393 | /* Check static vs global. */ | |
23c13d42 | 5394 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5395 | { |
2b79f376 | 5396 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5397 | const bool symbol_is_static = |
5398 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5399 | if (want_static != symbol_is_static) |
2b79f376 | 5400 | goto again; |
927aa2e7 JK |
5401 | } |
5402 | ||
5403 | /* Match dw2_symtab_iter_next, symbol_kind | |
5404 | and debug_names::psymbol_tag. */ | |
5405 | switch (m_domain) | |
5406 | { | |
5407 | case VAR_DOMAIN: | |
5408 | switch (indexval.dwarf_tag) | |
5409 | { | |
5410 | case DW_TAG_variable: | |
5411 | case DW_TAG_subprogram: | |
5412 | /* Some types are also in VAR_DOMAIN. */ | |
5413 | case DW_TAG_typedef: | |
5414 | case DW_TAG_structure_type: | |
5415 | break; | |
5416 | default: | |
5417 | goto again; | |
5418 | } | |
5419 | break; | |
5420 | case STRUCT_DOMAIN: | |
5421 | switch (indexval.dwarf_tag) | |
5422 | { | |
5423 | case DW_TAG_typedef: | |
5424 | case DW_TAG_structure_type: | |
5425 | break; | |
5426 | default: | |
5427 | goto again; | |
5428 | } | |
5429 | break; | |
5430 | case LABEL_DOMAIN: | |
5431 | switch (indexval.dwarf_tag) | |
5432 | { | |
5433 | case 0: | |
5434 | case DW_TAG_variable: | |
5435 | break; | |
5436 | default: | |
5437 | goto again; | |
5438 | } | |
5439 | break; | |
59c35742 AB |
5440 | case MODULE_DOMAIN: |
5441 | switch (indexval.dwarf_tag) | |
5442 | { | |
5443 | case DW_TAG_module: | |
5444 | break; | |
5445 | default: | |
5446 | goto again; | |
5447 | } | |
5448 | break; | |
927aa2e7 JK |
5449 | default: |
5450 | break; | |
5451 | } | |
5452 | ||
5453 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5454 | debug_names::psymbol_tag. */ | |
5455 | switch (m_search) | |
4b514bc8 | 5456 | { |
927aa2e7 JK |
5457 | case VARIABLES_DOMAIN: |
5458 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5459 | { |
927aa2e7 JK |
5460 | case DW_TAG_variable: |
5461 | break; | |
5462 | default: | |
5463 | goto again; | |
4b514bc8 | 5464 | } |
927aa2e7 JK |
5465 | break; |
5466 | case FUNCTIONS_DOMAIN: | |
5467 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5468 | { |
927aa2e7 JK |
5469 | case DW_TAG_subprogram: |
5470 | break; | |
5471 | default: | |
5472 | goto again; | |
4b514bc8 | 5473 | } |
927aa2e7 JK |
5474 | break; |
5475 | case TYPES_DOMAIN: | |
5476 | switch (indexval.dwarf_tag) | |
5477 | { | |
5478 | case DW_TAG_typedef: | |
5479 | case DW_TAG_structure_type: | |
5480 | break; | |
5481 | default: | |
5482 | goto again; | |
5483 | } | |
5484 | break; | |
59c35742 AB |
5485 | case MODULES_DOMAIN: |
5486 | switch (indexval.dwarf_tag) | |
5487 | { | |
5488 | case DW_TAG_module: | |
5489 | break; | |
5490 | default: | |
5491 | goto again; | |
5492 | } | |
927aa2e7 JK |
5493 | default: |
5494 | break; | |
4b514bc8 | 5495 | } |
927aa2e7 JK |
5496 | |
5497 | return per_cu; | |
4b514bc8 | 5498 | } |
61920122 | 5499 | |
927aa2e7 | 5500 | static struct compunit_symtab * |
c7f839cb | 5501 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 5502 | const char *name, domain_enum domain) |
4b514bc8 | 5503 | { |
ed2dc618 SM |
5504 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5505 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 5506 | |
927aa2e7 JK |
5507 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
5508 | if (!mapp) | |
61920122 | 5509 | { |
927aa2e7 JK |
5510 | /* index is NULL if OBJF_READNOW. */ |
5511 | return NULL; | |
5512 | } | |
5513 | const auto &map = *mapp; | |
9291a0cd | 5514 | |
2b79f376 | 5515 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 5516 | |
927aa2e7 JK |
5517 | struct compunit_symtab *stab_best = NULL; |
5518 | struct dwarf2_per_cu_data *per_cu; | |
5519 | while ((per_cu = iter.next ()) != NULL) | |
5520 | { | |
5521 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 5522 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 5523 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 5524 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 5525 | |
927aa2e7 JK |
5526 | sym = block_find_symbol (block, name, domain, |
5527 | block_find_non_opaque_type_preferred, | |
5528 | &with_opaque); | |
9703b513 | 5529 | |
927aa2e7 JK |
5530 | /* Some caution must be observed with overloaded functions and |
5531 | methods, since the index will not contain any overload | |
5532 | information (but NAME might contain it). */ | |
a3ec0bb1 | 5533 | |
927aa2e7 | 5534 | if (sym != NULL |
987012b8 | 5535 | && strcmp_iw (sym->search_name (), name) == 0) |
927aa2e7 JK |
5536 | return stab; |
5537 | if (with_opaque != NULL | |
987012b8 | 5538 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
927aa2e7 | 5539 | stab_best = stab; |
9703b513 | 5540 | |
927aa2e7 | 5541 | /* Keep looking through other CUs. */ |
9703b513 TT |
5542 | } |
5543 | ||
927aa2e7 | 5544 | return stab_best; |
9703b513 TT |
5545 | } |
5546 | ||
927aa2e7 JK |
5547 | /* This dumps minimal information about .debug_names. It is called |
5548 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5549 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5550 | |
927aa2e7 JK |
5551 | static void |
5552 | dw2_debug_names_dump (struct objfile *objfile) | |
5553 | { | |
ed2dc618 SM |
5554 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5555 | = get_dwarf2_per_objfile (objfile); | |
5556 | ||
927aa2e7 JK |
5557 | gdb_assert (dwarf2_per_objfile->using_index); |
5558 | printf_filtered (".debug_names:"); | |
5559 | if (dwarf2_per_objfile->debug_names_table) | |
5560 | printf_filtered (" exists\n"); | |
5561 | else | |
5562 | printf_filtered (" faked for \"readnow\"\n"); | |
5563 | printf_filtered ("\n"); | |
9291a0cd TT |
5564 | } |
5565 | ||
9291a0cd | 5566 | static void |
927aa2e7 JK |
5567 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
5568 | const char *func_name) | |
9291a0cd | 5569 | { |
ed2dc618 SM |
5570 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5571 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 5572 | |
927aa2e7 JK |
5573 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
5574 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 5575 | { |
927aa2e7 | 5576 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 5577 | |
2b79f376 | 5578 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 5579 | |
927aa2e7 JK |
5580 | struct dwarf2_per_cu_data *per_cu; |
5581 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 5582 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
5583 | } |
5584 | } | |
24c79950 | 5585 | |
3b00ef10 TT |
5586 | static void |
5587 | dw2_debug_names_map_matching_symbols | |
5588 | (struct objfile *objfile, | |
5589 | const lookup_name_info &name, domain_enum domain, | |
5590 | int global, | |
5591 | gdb::function_view<symbol_found_callback_ftype> callback, | |
5592 | symbol_compare_ftype *ordered_compare) | |
5593 | { | |
5594 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
5595 | = get_dwarf2_per_objfile (objfile); | |
5596 | ||
5597 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
5598 | if (!dwarf2_per_objfile->debug_names_table) | |
5599 | return; | |
5600 | ||
5601 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
5602 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
5603 | ||
5604 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5605 | auto matcher = [&] (const char *symname) | |
5606 | { | |
5607 | if (ordered_compare == nullptr) | |
5608 | return true; | |
5609 | return ordered_compare (symname, match_name) == 0; | |
5610 | }; | |
5611 | ||
5612 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
5613 | [&] (offset_type namei) | |
5614 | { | |
5615 | /* The name was matched, now expand corresponding CUs that were | |
5616 | marked. */ | |
5617 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
5618 | ||
5619 | struct dwarf2_per_cu_data *per_cu; | |
5620 | while ((per_cu = iter.next ()) != NULL) | |
5621 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
5622 | return true; | |
5623 | }); | |
5624 | ||
5625 | /* It's a shame we couldn't do this inside the | |
5626 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
5627 | that have already been expanded. Instead, this loop matches what | |
5628 | the psymtab code does. */ | |
5629 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
5630 | { | |
5631 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
5632 | if (cust != nullptr) | |
5633 | { | |
5634 | const struct block *block | |
5635 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
5636 | if (!iterate_over_symbols_terminated (block, name, | |
5637 | domain, callback)) | |
5638 | break; | |
5639 | } | |
5640 | } | |
5641 | } | |
5642 | ||
927aa2e7 JK |
5643 | static void |
5644 | dw2_debug_names_expand_symtabs_matching | |
5645 | (struct objfile *objfile, | |
5646 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5647 | const lookup_name_info &lookup_name, | |
5648 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5649 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5650 | enum search_domain kind) | |
5651 | { | |
ed2dc618 SM |
5652 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5653 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 5654 | |
927aa2e7 JK |
5655 | /* debug_names_table is NULL if OBJF_READNOW. */ |
5656 | if (!dwarf2_per_objfile->debug_names_table) | |
5657 | return; | |
9291a0cd | 5658 | |
ed2dc618 | 5659 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 5660 | |
44ed8f3e | 5661 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 5662 | |
44ed8f3e PA |
5663 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
5664 | symbol_matcher, | |
5665 | kind, [&] (offset_type namei) | |
927aa2e7 | 5666 | { |
927aa2e7 JK |
5667 | /* The name was matched, now expand corresponding CUs that were |
5668 | marked. */ | |
5669 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 5670 | |
927aa2e7 JK |
5671 | struct dwarf2_per_cu_data *per_cu; |
5672 | while ((per_cu = iter.next ()) != NULL) | |
5673 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
5674 | expansion_notify); | |
3b00ef10 | 5675 | return true; |
44ed8f3e | 5676 | }); |
9291a0cd TT |
5677 | } |
5678 | ||
927aa2e7 | 5679 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
5680 | { |
5681 | dw2_has_symbols, | |
5682 | dw2_find_last_source_symtab, | |
5683 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5684 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 5685 | dw2_debug_names_lookup_symbol, |
9291a0cd | 5686 | dw2_print_stats, |
927aa2e7 | 5687 | dw2_debug_names_dump, |
927aa2e7 | 5688 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 5689 | dw2_expand_all_symtabs, |
652a8996 | 5690 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 5691 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 5692 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 5693 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5694 | NULL, |
9291a0cd TT |
5695 | dw2_map_symbol_filenames |
5696 | }; | |
5697 | ||
4485a1c1 SM |
5698 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5699 | to either a dwarf2_per_objfile or dwz_file object. */ | |
5700 | ||
5701 | template <typename T> | |
5702 | static gdb::array_view<const gdb_byte> | |
5703 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5704 | { | |
5705 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5706 | ||
96b79293 | 5707 | if (section->empty ()) |
4485a1c1 SM |
5708 | return {}; |
5709 | ||
5710 | /* Older elfutils strip versions could keep the section in the main | |
5711 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5712 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5713 | return {}; |
5714 | ||
96b79293 | 5715 | section->read (obj); |
4485a1c1 | 5716 | |
8bebfcda PA |
5717 | /* dwarf2_section_info::size is a bfd_size_type, while |
5718 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5719 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5720 | is 32-bit. So we need an explicit narrowing conversion here. | |
5721 | This is fine, because it's impossible to allocate or mmap an | |
5722 | array/buffer larger than what size_t can represent. */ | |
5723 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5724 | } |
5725 | ||
87d6a7aa SM |
5726 | /* Lookup the index cache for the contents of the index associated to |
5727 | DWARF2_OBJ. */ | |
5728 | ||
5729 | static gdb::array_view<const gdb_byte> | |
5730 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
5731 | { | |
5732 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5733 | if (build_id == nullptr) | |
5734 | return {}; | |
5735 | ||
5736 | return global_index_cache.lookup_gdb_index (build_id, | |
5737 | &dwarf2_obj->index_cache_res); | |
5738 | } | |
5739 | ||
5740 | /* Same as the above, but for DWZ. */ | |
5741 | ||
5742 | static gdb::array_view<const gdb_byte> | |
5743 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5744 | { | |
5745 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5746 | if (build_id == nullptr) | |
5747 | return {}; | |
5748 | ||
5749 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5750 | } | |
5751 | ||
3c0aa29a | 5752 | /* See symfile.h. */ |
9291a0cd | 5753 | |
3c0aa29a PA |
5754 | bool |
5755 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 5756 | { |
ed2dc618 SM |
5757 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5758 | = get_dwarf2_per_objfile (objfile); | |
5759 | ||
9291a0cd TT |
5760 | /* If we're about to read full symbols, don't bother with the |
5761 | indices. In this case we also don't care if some other debug | |
5762 | format is making psymtabs, because they are all about to be | |
5763 | expanded anyway. */ | |
5764 | if ((objfile->flags & OBJF_READNOW)) | |
5765 | { | |
9291a0cd | 5766 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
5767 | create_all_comp_units (dwarf2_per_objfile); |
5768 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
5769 | dwarf2_per_objfile->quick_file_names_table |
5770 | = create_quick_file_names_table | |
5771 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 5772 | |
b76e467d | 5773 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5774 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 5775 | { |
ff4c9fec | 5776 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 5777 | |
e254ef6a DE |
5778 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5779 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5780 | } |
5781 | ||
5782 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5783 | these functions will be no-ops because we will have expanded | |
5784 | all symtabs. */ | |
3c0aa29a PA |
5785 | *index_kind = dw_index_kind::GDB_INDEX; |
5786 | return true; | |
9291a0cd TT |
5787 | } |
5788 | ||
ed2dc618 | 5789 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
5790 | { |
5791 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
5792 | return true; | |
5793 | } | |
927aa2e7 | 5794 | |
4485a1c1 SM |
5795 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
5796 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
5797 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
5798 | { |
5799 | *index_kind = dw_index_kind::GDB_INDEX; | |
5800 | return true; | |
5801 | } | |
9291a0cd | 5802 | |
87d6a7aa SM |
5803 | /* ... otherwise, try to find the index in the index cache. */ |
5804 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
5805 | get_gdb_index_contents_from_cache, | |
5806 | get_gdb_index_contents_from_cache_dwz)) | |
5807 | { | |
5808 | global_index_cache.hit (); | |
5809 | *index_kind = dw_index_kind::GDB_INDEX; | |
5810 | return true; | |
5811 | } | |
5812 | ||
5813 | global_index_cache.miss (); | |
3c0aa29a | 5814 | return false; |
9291a0cd TT |
5815 | } |
5816 | ||
5817 | \f | |
5818 | ||
dce234bc PP |
5819 | /* Build a partial symbol table. */ |
5820 | ||
5821 | void | |
f29dff0a | 5822 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5823 | { |
ed2dc618 SM |
5824 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5825 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 5826 | |
6eee24ce | 5827 | init_psymbol_list (objfile, 1024); |
c906108c | 5828 | |
a70b8144 | 5829 | try |
c9bf0622 TT |
5830 | { |
5831 | /* This isn't really ideal: all the data we allocate on the | |
5832 | objfile's obstack is still uselessly kept around. However, | |
5833 | freeing it seems unsafe. */ | |
906768f9 | 5834 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 5835 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 5836 | psymtabs.keep (); |
87d6a7aa SM |
5837 | |
5838 | /* (maybe) store an index in the cache. */ | |
5839 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 5840 | } |
230d2906 | 5841 | catch (const gdb_exception_error &except) |
492d29ea PA |
5842 | { |
5843 | exception_print (gdb_stderr, except); | |
5844 | } | |
c906108c | 5845 | } |
c906108c | 5846 | |
3b80fe9b DE |
5847 | /* Find the base address of the compilation unit for range lists and |
5848 | location lists. It will normally be specified by DW_AT_low_pc. | |
5849 | In DWARF-3 draft 4, the base address could be overridden by | |
5850 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5851 | compilation units with discontinuous ranges. */ | |
5852 | ||
5853 | static void | |
5854 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5855 | { | |
5856 | struct attribute *attr; | |
5857 | ||
5858 | cu->base_known = 0; | |
5859 | cu->base_address = 0; | |
5860 | ||
5861 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5862 | if (attr != nullptr) |
3b80fe9b | 5863 | { |
cd6c91b4 | 5864 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5865 | cu->base_known = 1; |
5866 | } | |
5867 | else | |
5868 | { | |
5869 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5870 | if (attr != nullptr) |
3b80fe9b | 5871 | { |
cd6c91b4 | 5872 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5873 | cu->base_known = 1; |
5874 | } | |
5875 | } | |
5876 | } | |
5877 | ||
36586728 TT |
5878 | /* Helper function that returns the proper abbrev section for |
5879 | THIS_CU. */ | |
5880 | ||
5881 | static struct dwarf2_section_info * | |
5882 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5883 | { | |
5884 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 5885 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
5886 | |
5887 | if (this_cu->is_dwz) | |
ed2dc618 | 5888 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
5889 | else |
5890 | abbrev = &dwarf2_per_objfile->abbrev; | |
5891 | ||
5892 | return abbrev; | |
5893 | } | |
5894 | ||
f4dc4d17 DE |
5895 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5896 | ||
5897 | static sect_offset | |
ed2dc618 SM |
5898 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5899 | struct dwarf2_section_info *section, | |
9c541725 | 5900 | sect_offset sect_off) |
f4dc4d17 | 5901 | { |
96b79293 | 5902 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5903 | const gdb_byte *info_ptr; |
ac298888 | 5904 | unsigned int initial_length_size, offset_size; |
43988095 | 5905 | uint16_t version; |
f4dc4d17 | 5906 | |
96b79293 | 5907 | section->read (dwarf2_per_objfile->objfile); |
9c541725 | 5908 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5909 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5910 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5911 | info_ptr += initial_length_size; |
5912 | ||
5913 | version = read_2_bytes (abfd, info_ptr); | |
5914 | info_ptr += 2; | |
5915 | if (version >= 5) | |
5916 | { | |
5917 | /* Skip unit type and address size. */ | |
5918 | info_ptr += 2; | |
5919 | } | |
5920 | ||
24aa364d | 5921 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5922 | } |
5923 | ||
b83470bf TT |
5924 | /* A partial symtab that is used only for include files. */ |
5925 | struct dwarf2_include_psymtab : public partial_symtab | |
5926 | { | |
5927 | dwarf2_include_psymtab (const char *filename, struct objfile *objfile) | |
5928 | : partial_symtab (filename, objfile) | |
5929 | { | |
5930 | } | |
5931 | ||
5932 | void read_symtab (struct objfile *objfile) override | |
5933 | { | |
5934 | expand_psymtab (objfile); | |
5935 | } | |
5936 | ||
5937 | void expand_psymtab (struct objfile *objfile) override | |
5938 | { | |
5939 | if (m_readin) | |
5940 | return; | |
5941 | /* It's an include file, no symbols to read for it. | |
5942 | Everything is in the parent symtab. */ | |
5943 | read_dependencies (objfile); | |
5944 | m_readin = true; | |
5945 | } | |
5946 | ||
5947 | bool readin_p () const override | |
5948 | { | |
5949 | return m_readin; | |
5950 | } | |
5951 | ||
5952 | struct compunit_symtab *get_compunit_symtab () const override | |
5953 | { | |
5954 | return nullptr; | |
5955 | } | |
5956 | ||
5957 | private: | |
5958 | ||
5959 | bool m_readin = false; | |
5960 | }; | |
5961 | ||
aaa75496 JB |
5962 | /* Allocate a new partial symtab for file named NAME and mark this new |
5963 | partial symtab as being an include of PST. */ | |
5964 | ||
5965 | static void | |
891813be | 5966 | dwarf2_create_include_psymtab (const char *name, dwarf2_psymtab *pst, |
aaa75496 JB |
5967 | struct objfile *objfile) |
5968 | { | |
b83470bf | 5969 | dwarf2_include_psymtab *subpst = new dwarf2_include_psymtab (name, objfile); |
aaa75496 | 5970 | |
fbd9ab74 JK |
5971 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5972 | { | |
5973 | /* It shares objfile->objfile_obstack. */ | |
5974 | subpst->dirname = pst->dirname; | |
5975 | } | |
5976 | ||
a9342b62 | 5977 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
5978 | subpst->dependencies[0] = pst; |
5979 | subpst->number_of_dependencies = 1; | |
aaa75496 JB |
5980 | } |
5981 | ||
5982 | /* Read the Line Number Program data and extract the list of files | |
5983 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5984 | partial symtab for each of these included files. */ |
aaa75496 JB |
5985 | |
5986 | static void | |
5987 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 5988 | struct die_info *die, |
891813be | 5989 | dwarf2_psymtab *pst) |
aaa75496 | 5990 | { |
fff8551c | 5991 | line_header_up lh; |
d85a05f0 | 5992 | struct attribute *attr; |
aaa75496 | 5993 | |
d85a05f0 | 5994 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
435d3d88 | 5995 | if (attr != nullptr) |
9c541725 | 5996 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5997 | if (lh == NULL) |
5998 | return; /* No linetable, so no includes. */ | |
5999 | ||
79748972 TT |
6000 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
6001 | that we pass in the raw text_low here; that is ok because we're | |
6002 | only decoding the line table to make include partial symtabs, and | |
6003 | so the addresses aren't really used. */ | |
4ae976d1 | 6004 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 6005 | pst->raw_text_low (), 1); |
aaa75496 JB |
6006 | } |
6007 | ||
348e048f | 6008 | static hashval_t |
52dc124a | 6009 | hash_signatured_type (const void *item) |
348e048f | 6010 | { |
9a3c8263 SM |
6011 | const struct signatured_type *sig_type |
6012 | = (const struct signatured_type *) item; | |
9a619af0 | 6013 | |
348e048f | 6014 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6015 | return sig_type->signature; |
348e048f DE |
6016 | } |
6017 | ||
6018 | static int | |
52dc124a | 6019 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6020 | { |
9a3c8263 SM |
6021 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6022 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6023 | |
348e048f DE |
6024 | return lhs->signature == rhs->signature; |
6025 | } | |
6026 | ||
1fd400ff TT |
6027 | /* Allocate a hash table for signatured types. */ |
6028 | ||
b0b6a987 | 6029 | static htab_up |
298e9637 | 6030 | allocate_signatured_type_table () |
1fd400ff | 6031 | { |
b0b6a987 TT |
6032 | return htab_up (htab_create_alloc (41, |
6033 | hash_signatured_type, | |
6034 | eq_signatured_type, | |
6035 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
6036 | } |
6037 | ||
d467dd73 | 6038 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6039 | |
6040 | static int | |
d467dd73 | 6041 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6042 | { |
9a3c8263 | 6043 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6044 | std::vector<signatured_type *> *all_type_units |
6045 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6046 | |
b2bdb8cf | 6047 | all_type_units->push_back (sigt); |
1fd400ff TT |
6048 | |
6049 | return 1; | |
6050 | } | |
6051 | ||
78d4d2c5 | 6052 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6053 | and fill them into TYPES_HTAB. It will process only type units, |
6054 | therefore DW_UT_type. */ | |
c88ee1f0 | 6055 | |
78d4d2c5 | 6056 | static void |
ed2dc618 SM |
6057 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6058 | struct dwo_file *dwo_file, | |
b0b6a987 | 6059 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 6060 | rcuh_kind section_kind) |
348e048f | 6061 | { |
3019eac3 | 6062 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6063 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6064 | bfd *abfd; |
6065 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6066 | |
4bdcc0c1 DE |
6067 | abbrev_section = (dwo_file != NULL |
6068 | ? &dwo_file->sections.abbrev | |
6069 | : &dwarf2_per_objfile->abbrev); | |
6070 | ||
b4f54984 | 6071 | if (dwarf_read_debug) |
43988095 | 6072 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
96b79293 TT |
6073 | section->get_name (), |
6074 | abbrev_section->get_file_name ()); | |
09406207 | 6075 | |
96b79293 | 6076 | section->read (objfile); |
78d4d2c5 | 6077 | info_ptr = section->buffer; |
348e048f | 6078 | |
78d4d2c5 JK |
6079 | if (info_ptr == NULL) |
6080 | return; | |
348e048f | 6081 | |
78d4d2c5 JK |
6082 | /* We can't set abfd until now because the section may be empty or |
6083 | not present, in which case the bfd is unknown. */ | |
96b79293 | 6084 | abfd = section->get_bfd_owner (); |
348e048f | 6085 | |
c0ab21c2 TT |
6086 | /* We don't use cutu_reader here because we don't need to read |
6087 | any dies: the signature is in the header. */ | |
3019eac3 | 6088 | |
78d4d2c5 JK |
6089 | end_ptr = info_ptr + section->size; |
6090 | while (info_ptr < end_ptr) | |
6091 | { | |
78d4d2c5 JK |
6092 | struct signatured_type *sig_type; |
6093 | struct dwo_unit *dwo_tu; | |
6094 | void **slot; | |
6095 | const gdb_byte *ptr = info_ptr; | |
6096 | struct comp_unit_head header; | |
6097 | unsigned int length; | |
8b70b953 | 6098 | |
9c541725 | 6099 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6100 | |
a49dd8dd JK |
6101 | /* Initialize it due to a false compiler warning. */ |
6102 | header.signature = -1; | |
9c541725 | 6103 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6104 | |
78d4d2c5 JK |
6105 | /* We need to read the type's signature in order to build the hash |
6106 | table, but we don't need anything else just yet. */ | |
348e048f | 6107 | |
ed2dc618 | 6108 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6109 | abbrev_section, ptr, section_kind); |
348e048f | 6110 | |
4057dfde | 6111 | length = header.get_length (); |
6caca83c | 6112 | |
78d4d2c5 JK |
6113 | /* Skip dummy type units. */ |
6114 | if (ptr >= info_ptr + length | |
43988095 JK |
6115 | || peek_abbrev_code (abfd, ptr) == 0 |
6116 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6117 | { |
6118 | info_ptr += length; | |
6119 | continue; | |
6120 | } | |
dee91e82 | 6121 | |
78d4d2c5 JK |
6122 | if (types_htab == NULL) |
6123 | { | |
6124 | if (dwo_file) | |
298e9637 | 6125 | types_htab = allocate_dwo_unit_table (); |
78d4d2c5 | 6126 | else |
298e9637 | 6127 | types_htab = allocate_signatured_type_table (); |
78d4d2c5 | 6128 | } |
8b70b953 | 6129 | |
78d4d2c5 JK |
6130 | if (dwo_file) |
6131 | { | |
6132 | sig_type = NULL; | |
6133 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6134 | struct dwo_unit); | |
6135 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6136 | dwo_tu->signature = header.signature; |
9c541725 | 6137 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6138 | dwo_tu->section = section; |
9c541725 | 6139 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6140 | dwo_tu->length = length; |
6141 | } | |
6142 | else | |
6143 | { | |
6144 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6145 | The real type_offset is in the DWO file. */ | |
6146 | dwo_tu = NULL; | |
6147 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6148 | struct signatured_type); | |
43988095 | 6149 | sig_type->signature = header.signature; |
9c541725 | 6150 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6151 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6152 | sig_type->per_cu.is_debug_types = 1; |
6153 | sig_type->per_cu.section = section; | |
9c541725 | 6154 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6155 | sig_type->per_cu.length = length; |
6156 | } | |
6157 | ||
b0b6a987 | 6158 | slot = htab_find_slot (types_htab.get (), |
78d4d2c5 JK |
6159 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
6160 | INSERT); | |
6161 | gdb_assert (slot != NULL); | |
6162 | if (*slot != NULL) | |
6163 | { | |
9c541725 | 6164 | sect_offset dup_sect_off; |
0349ea22 | 6165 | |
3019eac3 DE |
6166 | if (dwo_file) |
6167 | { | |
78d4d2c5 JK |
6168 | const struct dwo_unit *dup_tu |
6169 | = (const struct dwo_unit *) *slot; | |
6170 | ||
9c541725 | 6171 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6172 | } |
6173 | else | |
6174 | { | |
78d4d2c5 JK |
6175 | const struct signatured_type *dup_tu |
6176 | = (const struct signatured_type *) *slot; | |
6177 | ||
9c541725 | 6178 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6179 | } |
8b70b953 | 6180 | |
b98664d3 | 6181 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6182 | " the entry at offset %s, signature %s"), |
6183 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6184 | hex_string (header.signature)); |
78d4d2c5 JK |
6185 | } |
6186 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6187 | |
78d4d2c5 | 6188 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6189 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6190 | sect_offset_str (sect_off), | |
43988095 | 6191 | hex_string (header.signature)); |
3019eac3 | 6192 | |
78d4d2c5 JK |
6193 | info_ptr += length; |
6194 | } | |
6195 | } | |
3019eac3 | 6196 | |
78d4d2c5 JK |
6197 | /* Create the hash table of all entries in the .debug_types |
6198 | (or .debug_types.dwo) section(s). | |
6199 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6200 | otherwise it is NULL. | |
b3c8eb43 | 6201 | |
78d4d2c5 | 6202 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6203 | |
78d4d2c5 | 6204 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6205 | |
78d4d2c5 | 6206 | static void |
ed2dc618 SM |
6207 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6208 | struct dwo_file *dwo_file, | |
fd5866f6 | 6209 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 6210 | htab_up &types_htab) |
78d4d2c5 | 6211 | { |
fd5866f6 SM |
6212 | for (dwarf2_section_info §ion : type_sections) |
6213 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6214 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6215 | } |
6216 | ||
6217 | /* Create the hash table of all entries in the .debug_types section, | |
6218 | and initialize all_type_units. | |
6219 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6220 | otherwise non-zero. */ | |
6221 | ||
6222 | static int | |
ed2dc618 | 6223 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6224 | { |
b0b6a987 | 6225 | htab_up types_htab; |
3019eac3 | 6226 | |
ed2dc618 SM |
6227 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6228 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6229 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6230 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6231 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6232 | if (types_htab == NULL) |
6233 | { | |
6234 | dwarf2_per_objfile->signatured_types = NULL; | |
6235 | return 0; | |
6236 | } | |
6237 | ||
b0b6a987 | 6238 | dwarf2_per_objfile->signatured_types = std::move (types_htab); |
348e048f | 6239 | |
b2bdb8cf | 6240 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
b0b6a987 TT |
6241 | dwarf2_per_objfile->all_type_units.reserve |
6242 | (htab_elements (dwarf2_per_objfile->signatured_types.get ())); | |
b2bdb8cf | 6243 | |
b0b6a987 TT |
6244 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types.get (), |
6245 | add_signatured_type_cu_to_table, | |
b2bdb8cf | 6246 | &dwarf2_per_objfile->all_type_units); |
1fd400ff | 6247 | |
348e048f DE |
6248 | return 1; |
6249 | } | |
6250 | ||
6aa5f3a6 DE |
6251 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6252 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6253 | Otherwise we find one. */ | |
6254 | ||
6255 | static struct signatured_type * | |
ed2dc618 SM |
6256 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6257 | void **slot) | |
6aa5f3a6 DE |
6258 | { |
6259 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6260 | |
b2bdb8cf SM |
6261 | if (dwarf2_per_objfile->all_type_units.size () |
6262 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6263 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6264 | |
b2bdb8cf SM |
6265 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6266 | struct signatured_type); | |
6267 | ||
6268 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6269 | sig_type->signature = sig; |
6270 | sig_type->per_cu.is_debug_types = 1; | |
6271 | if (dwarf2_per_objfile->using_index) | |
6272 | { | |
6273 | sig_type->per_cu.v.quick = | |
6274 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6275 | struct dwarf2_per_cu_quick_data); | |
6276 | } | |
6277 | ||
6278 | if (slot == NULL) | |
6279 | { | |
b0b6a987 | 6280 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 DE |
6281 | sig_type, INSERT); |
6282 | } | |
6283 | gdb_assert (*slot == NULL); | |
6284 | *slot = sig_type; | |
6285 | /* The rest of sig_type must be filled in by the caller. */ | |
6286 | return sig_type; | |
6287 | } | |
6288 | ||
a2ce51a0 DE |
6289 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6290 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6291 | ||
6292 | static void | |
ed2dc618 | 6293 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6294 | struct signatured_type *sig_entry, |
6295 | struct dwo_unit *dwo_entry) | |
6296 | { | |
7ee85ab1 | 6297 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6298 | gdb_assert (! sig_entry->per_cu.queued); |
6299 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6300 | if (dwarf2_per_objfile->using_index) |
6301 | { | |
6302 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6303 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6304 | } |
6305 | else | |
6306 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6307 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6308 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6309 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6310 | gdb_assert (sig_entry->dwo_unit == NULL); |
6311 | ||
6312 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6313 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6314 | sig_entry->per_cu.length = dwo_entry->length; |
6315 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6316 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6317 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6318 | sig_entry->dwo_unit = dwo_entry; | |
6319 | } | |
6320 | ||
6321 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6322 | If we haven't read the TU yet, create the signatured_type data structure |
6323 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6324 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6325 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6326 | containing that CU. Otherwise we could end up reading several other DWO | |
6327 | files (due to comdat folding) to process the transitive closure of all the | |
6328 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6329 | type signature that it needs. | |
a2ce51a0 DE |
6330 | We only do this for .gdb_index because in the psymtab case we already have |
6331 | to read all the DWOs to build the type unit groups. */ | |
6332 | ||
6333 | static struct signatured_type * | |
6334 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6335 | { | |
518817b3 SM |
6336 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6337 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6338 | struct dwo_file *dwo_file; |
6339 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6340 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6341 | void **slot; |
a2ce51a0 DE |
6342 | |
6343 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6344 | ||
6aa5f3a6 DE |
6345 | /* If TU skeletons have been removed then we may not have read in any |
6346 | TUs yet. */ | |
6347 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6348 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 DE |
6349 | |
6350 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6351 | Use the global signatured_types array to do our own comdat-folding |
6352 | of types. If this is the first time we're reading this TU, and | |
6353 | the TU has an entry in .gdb_index, replace the recorded data from | |
6354 | .gdb_index with this TU. */ | |
a2ce51a0 | 6355 | |
a2ce51a0 | 6356 | find_sig_entry.signature = sig; |
b0b6a987 | 6357 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6358 | &find_sig_entry, INSERT); |
9a3c8263 | 6359 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6360 | |
6361 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6362 | read. Don't reassign the global entry to point to this DWO if that's |
6363 | the case. Also note that if the TU is already being read, it may not | |
6364 | have come from a DWO, the program may be a mix of Fission-compiled | |
6365 | code and non-Fission-compiled code. */ | |
6366 | ||
6367 | /* Have we already tried to read this TU? | |
6368 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6369 | needn't exist in the global table yet). */ | |
6370 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6371 | return sig_entry; |
6372 | ||
6aa5f3a6 DE |
6373 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6374 | dwo_unit of the TU itself. */ | |
6375 | dwo_file = cu->dwo_unit->dwo_file; | |
6376 | ||
a2ce51a0 DE |
6377 | /* Ok, this is the first time we're reading this TU. */ |
6378 | if (dwo_file->tus == NULL) | |
6379 | return NULL; | |
6380 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6381 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6382 | &find_dwo_entry); | |
a2ce51a0 DE |
6383 | if (dwo_entry == NULL) |
6384 | return NULL; | |
6385 | ||
6aa5f3a6 DE |
6386 | /* If the global table doesn't have an entry for this TU, add one. */ |
6387 | if (sig_entry == NULL) | |
ed2dc618 | 6388 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 6389 | |
ed2dc618 | 6390 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 6391 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6392 | return sig_entry; |
6393 | } | |
6394 | ||
a2ce51a0 DE |
6395 | /* Subroutine of lookup_signatured_type. |
6396 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6397 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6398 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6399 | |
6400 | static struct signatured_type * | |
6401 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6402 | { | |
518817b3 SM |
6403 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6404 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6405 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
6406 | struct dwo_unit *dwo_entry; |
6407 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6408 | void **slot; |
a2ce51a0 DE |
6409 | |
6410 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6411 | gdb_assert (dwp_file != NULL); | |
6412 | ||
6aa5f3a6 DE |
6413 | /* If TU skeletons have been removed then we may not have read in any |
6414 | TUs yet. */ | |
6415 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6416 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 | 6417 | |
6aa5f3a6 | 6418 | find_sig_entry.signature = sig; |
b0b6a987 | 6419 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6420 | &find_sig_entry, INSERT); |
9a3c8263 | 6421 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6422 | |
6423 | /* Have we already tried to read this TU? | |
6424 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6425 | needn't exist in the global table yet). */ | |
6426 | if (sig_entry != NULL) | |
6427 | return sig_entry; | |
6428 | ||
a2ce51a0 DE |
6429 | if (dwp_file->tus == NULL) |
6430 | return NULL; | |
ed2dc618 | 6431 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 6432 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
6433 | if (dwo_entry == NULL) |
6434 | return NULL; | |
6435 | ||
ed2dc618 SM |
6436 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6437 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6438 | |
a2ce51a0 DE |
6439 | return sig_entry; |
6440 | } | |
6441 | ||
380bca97 | 6442 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6443 | Returns NULL if signature SIG is not present in the table. |
6444 | It is up to the caller to complain about this. */ | |
348e048f DE |
6445 | |
6446 | static struct signatured_type * | |
a2ce51a0 | 6447 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6448 | { |
518817b3 SM |
6449 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6450 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6451 | |
a2ce51a0 DE |
6452 | if (cu->dwo_unit |
6453 | && dwarf2_per_objfile->using_index) | |
6454 | { | |
6455 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6456 | These cases require special processing. */ | |
ed2dc618 | 6457 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
6458 | return lookup_dwo_signatured_type (cu, sig); |
6459 | else | |
6460 | return lookup_dwp_signatured_type (cu, sig); | |
6461 | } | |
6462 | else | |
6463 | { | |
6464 | struct signatured_type find_entry, *entry; | |
348e048f | 6465 | |
a2ce51a0 DE |
6466 | if (dwarf2_per_objfile->signatured_types == NULL) |
6467 | return NULL; | |
6468 | find_entry.signature = sig; | |
9a3c8263 | 6469 | entry = ((struct signatured_type *) |
b0b6a987 TT |
6470 | htab_find (dwarf2_per_objfile->signatured_types.get (), |
6471 | &find_entry)); | |
a2ce51a0 DE |
6472 | return entry; |
6473 | } | |
348e048f | 6474 | } |
18a8505e AT |
6475 | |
6476 | /* Return the address base of the compile unit, which, if exists, is stored | |
6477 | either at the attribute DW_AT_GNU_addr_base, or DW_AT_addr_base. */ | |
6478 | static gdb::optional<ULONGEST> | |
6479 | lookup_addr_base (struct die_info *comp_unit_die) | |
6480 | { | |
6481 | struct attribute *attr; | |
6482 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_addr_base); | |
6483 | if (attr == nullptr) | |
6484 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_addr_base); | |
6485 | if (attr == nullptr) | |
6486 | return gdb::optional<ULONGEST> (); | |
6487 | return DW_UNSND (attr); | |
6488 | } | |
6489 | ||
6490 | /* Return range lists base of the compile unit, which, if exists, is stored | |
6491 | either at the attribute DW_AT_rnglists_base or DW_AT_GNU_ranges_base. */ | |
6492 | static ULONGEST | |
6493 | lookup_ranges_base (struct die_info *comp_unit_die) | |
6494 | { | |
6495 | struct attribute *attr; | |
6496 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_rnglists_base); | |
6497 | if (attr == nullptr) | |
6498 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_ranges_base); | |
6499 | if (attr == nullptr) | |
6500 | return 0; | |
6501 | return DW_UNSND (attr); | |
6502 | } | |
6503 | ||
42e7ad6c | 6504 | /* Low level DIE reading support. */ |
348e048f | 6505 | |
d85a05f0 DJ |
6506 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6507 | ||
6508 | static void | |
6509 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6510 | struct dwarf2_cu *cu, |
3019eac3 | 6511 | struct dwarf2_section_info *section, |
685af9cd TT |
6512 | struct dwo_file *dwo_file, |
6513 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6514 | { |
fceca515 | 6515 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6516 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6517 | reader->cu = cu; |
3019eac3 | 6518 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6519 | reader->die_section = section; |
6520 | reader->buffer = section->buffer; | |
f664829e | 6521 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6522 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6523 | } |
6524 | ||
c0ab21c2 | 6525 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6526 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6527 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6528 | already. |
6529 | ||
6530 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6531 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6532 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6533 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6534 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6535 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6536 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6537 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6538 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6539 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6540 | kept around for at least as long as *RESULT_READER. | |
6541 | ||
b0c7bfa9 DE |
6542 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6543 | ||
6544 | static int | |
6545 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6546 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 6547 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6548 | const char *stub_comp_dir, |
b0c7bfa9 | 6549 | struct die_reader_specs *result_reader, |
d521ce57 | 6550 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6551 | struct die_info **result_comp_unit_die, |
685af9cd | 6552 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6553 | { |
ed2dc618 | 6554 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
6555 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6556 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6557 | bfd *abfd; |
d521ce57 | 6558 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6559 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6560 | int i,num_extra_attrs; | |
6561 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6562 | struct die_info *comp_unit_die; |
6563 | ||
b0aeadb3 DE |
6564 | /* At most one of these may be provided. */ |
6565 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6566 | |
b0c7bfa9 DE |
6567 | /* These attributes aren't processed until later: |
6568 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6569 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6570 | referenced later. However, these attributes are found in the stub | |
6571 | which we won't have later. In order to not impose this complication | |
6572 | on the rest of the code, we read them here and copy them to the | |
6573 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6574 | |
6575 | stmt_list = NULL; | |
6576 | low_pc = NULL; | |
6577 | high_pc = NULL; | |
6578 | ranges = NULL; | |
6579 | comp_dir = NULL; | |
6580 | ||
6581 | if (stub_comp_unit_die != NULL) | |
6582 | { | |
6583 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6584 | DWO file. */ | |
6585 | if (! this_cu->is_debug_types) | |
6586 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6587 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6588 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6589 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6590 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6591 | ||
18a8505e | 6592 | cu->addr_base = lookup_addr_base (stub_comp_unit_die); |
b0c7bfa9 | 6593 | |
18a8505e AT |
6594 | /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute |
6595 | here (if needed). We need the value before we can process | |
6596 | DW_AT_ranges. */ | |
6597 | cu->ranges_base = lookup_ranges_base (stub_comp_unit_die); | |
b0c7bfa9 | 6598 | } |
a2ce51a0 DE |
6599 | else if (stub_comp_dir != NULL) |
6600 | { | |
6601 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6602 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6603 | comp_dir->name = DW_AT_comp_dir; |
6604 | comp_dir->form = DW_FORM_string; | |
6605 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6606 | DW_STRING (comp_dir) = stub_comp_dir; | |
6607 | } | |
b0c7bfa9 DE |
6608 | |
6609 | /* Set up for reading the DWO CU/TU. */ | |
6610 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6611 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6612 | section->read (objfile); |
6613 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6614 | begin_info_ptr = info_ptr = (section->buffer |
6615 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6616 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
6617 | |
6618 | if (this_cu->is_debug_types) | |
6619 | { | |
b0c7bfa9 DE |
6620 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6621 | ||
ed2dc618 SM |
6622 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6623 | &cu->header, section, | |
b0c7bfa9 | 6624 | dwo_abbrev_section, |
43988095 | 6625 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6626 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6627 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6628 | { |
6629 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6630 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6631 | hex_string (sig_type->signature), |
43988095 | 6632 | hex_string (cu->header.signature), |
9d8780f0 | 6633 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6634 | bfd_get_filename (abfd)); |
6635 | } | |
9c541725 | 6636 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6637 | /* For DWOs coming from DWP files, we don't know the CU length |
6638 | nor the type's offset in the TU until now. */ | |
4057dfde | 6639 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6640 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6641 | |
6642 | /* Establish the type offset that can be used to lookup the type. | |
6643 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6644 | sig_type->type_offset_in_section |
6645 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6646 | } |
6647 | else | |
6648 | { | |
ed2dc618 SM |
6649 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6650 | &cu->header, section, | |
b0c7bfa9 | 6651 | dwo_abbrev_section, |
43988095 | 6652 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6653 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6654 | /* For DWOs coming from DWP files, we don't know the CU length |
6655 | until now. */ | |
4057dfde | 6656 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6657 | } |
6658 | ||
685af9cd | 6659 | *result_dwo_abbrev_table |
86de1d91 TT |
6660 | = abbrev_table::read (objfile, dwo_abbrev_section, |
6661 | cu->header.abbrev_sect_off); | |
685af9cd TT |
6662 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6663 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6664 | |
6665 | /* Read in the die, but leave space to copy over the attributes | |
6666 | from the stub. This has the benefit of simplifying the rest of | |
6667 | the code - all the work to maintain the illusion of a single | |
6668 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6669 | num_extra_attrs = ((stmt_list != NULL) | |
6670 | + (low_pc != NULL) | |
6671 | + (high_pc != NULL) | |
6672 | + (ranges != NULL) | |
6673 | + (comp_dir != NULL)); | |
6674 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6675 | num_extra_attrs); |
b0c7bfa9 DE |
6676 | |
6677 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6678 | comp_unit_die = *result_comp_unit_die; | |
6679 | i = comp_unit_die->num_attrs; | |
6680 | if (stmt_list != NULL) | |
6681 | comp_unit_die->attrs[i++] = *stmt_list; | |
6682 | if (low_pc != NULL) | |
6683 | comp_unit_die->attrs[i++] = *low_pc; | |
6684 | if (high_pc != NULL) | |
6685 | comp_unit_die->attrs[i++] = *high_pc; | |
6686 | if (ranges != NULL) | |
6687 | comp_unit_die->attrs[i++] = *ranges; | |
6688 | if (comp_dir != NULL) | |
6689 | comp_unit_die->attrs[i++] = *comp_dir; | |
6690 | comp_unit_die->num_attrs += num_extra_attrs; | |
6691 | ||
b4f54984 | 6692 | if (dwarf_die_debug) |
bf6af496 DE |
6693 | { |
6694 | fprintf_unfiltered (gdb_stdlog, | |
6695 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6696 | section->get_name (), |
bf6af496 DE |
6697 | (unsigned) (begin_info_ptr - section->buffer), |
6698 | bfd_get_filename (abfd)); | |
b4f54984 | 6699 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6700 | } |
6701 | ||
b0c7bfa9 DE |
6702 | /* Skip dummy compilation units. */ |
6703 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6704 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6705 | return 0; | |
6706 | ||
6707 | *result_info_ptr = info_ptr; | |
6708 | return 1; | |
6709 | } | |
6710 | ||
a084a2a6 AT |
6711 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6712 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6713 | signature is part of the header. */ | |
6714 | static gdb::optional<ULONGEST> | |
6715 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6716 | { | |
6717 | if (cu->header.version >= 5) | |
6718 | return cu->header.signature; | |
6719 | struct attribute *attr; | |
6720 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6721 | if (attr == nullptr) | |
6722 | return gdb::optional<ULONGEST> (); | |
6723 | return DW_UNSND (attr); | |
6724 | } | |
6725 | ||
c0ab21c2 | 6726 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6727 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6728 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6729 | |
6730 | static struct dwo_unit * | |
6731 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
c0ab21c2 TT |
6732 | struct die_info *comp_unit_die, |
6733 | const char *dwo_name) | |
b0c7bfa9 DE |
6734 | { |
6735 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6736 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6737 | const char *comp_dir; |
b0c7bfa9 | 6738 | |
a2ce51a0 DE |
6739 | gdb_assert (cu != NULL); |
6740 | ||
b0c7bfa9 | 6741 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6742 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6743 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
6744 | |
6745 | if (this_cu->is_debug_types) | |
6746 | { | |
6747 | struct signatured_type *sig_type; | |
6748 | ||
6749 | /* Since this_cu is the first member of struct signatured_type, | |
6750 | we can go from a pointer to one to a pointer to the other. */ | |
6751 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
6752 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
6753 | } | |
6754 | else | |
6755 | { | |
a084a2a6 AT |
6756 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
6757 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
6758 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6759 | " [in module %s]"), | |
e3b94546 | 6760 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 6761 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 6762 | *signature); |
b0c7bfa9 DE |
6763 | } |
6764 | ||
b0c7bfa9 DE |
6765 | return dwo_unit; |
6766 | } | |
6767 | ||
c0ab21c2 | 6768 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6769 | See it for a description of the parameters. |
fcd3b13d | 6770 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6771 | |
c0ab21c2 TT |
6772 | void |
6773 | cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 6774 | int use_existing_cu) |
a2ce51a0 | 6775 | { |
a2ce51a0 | 6776 | struct signatured_type *sig_type; |
a2ce51a0 DE |
6777 | |
6778 | /* Verify we can do the following downcast, and that we have the | |
6779 | data we need. */ | |
6780 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6781 | sig_type = (struct signatured_type *) this_cu; | |
6782 | gdb_assert (sig_type->dwo_unit != NULL); | |
6783 | ||
6aa5f3a6 DE |
6784 | if (use_existing_cu && this_cu->cu != NULL) |
6785 | { | |
6786 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6787 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6788 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6789 | } |
6790 | else | |
6791 | { | |
6792 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6793 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 | 6794 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
6795 | } |
6796 | ||
6797 | /* A future optimization, if needed, would be to use an existing | |
6798 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6799 | could share abbrev tables. */ | |
a2ce51a0 DE |
6800 | |
6801 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
a2ce51a0 DE |
6802 | NULL /* stub_comp_unit_die */, |
6803 | sig_type->dwo_unit->dwo_file->comp_dir, | |
4ebe4877 | 6804 | this, &info_ptr, |
3e225074 | 6805 | &comp_unit_die, |
c0ab21c2 | 6806 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6807 | { |
6808 | /* Dummy die. */ | |
c0ab21c2 | 6809 | dummy_p = true; |
a2ce51a0 | 6810 | } |
a2ce51a0 DE |
6811 | } |
6812 | ||
fd820528 | 6813 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6814 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6815 | |
f4dc4d17 DE |
6816 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6817 | Otherwise the table specified in the comp unit header is read in and used. | |
6818 | This is an optimization for when we already have the abbrev table. | |
6819 | ||
dee91e82 | 6820 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6751ebae | 6821 | Otherwise, a new CU is allocated with xmalloc. */ |
aaa75496 | 6822 | |
c0ab21c2 TT |
6823 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
6824 | struct abbrev_table *abbrev_table, | |
6751ebae | 6825 | int use_existing_cu, |
c0ab21c2 TT |
6826 | bool skip_partial) |
6827 | : die_reader_specs {}, | |
6751ebae | 6828 | m_this_cu (this_cu) |
c906108c | 6829 | { |
ed2dc618 | 6830 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 6831 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6832 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6833 | bfd *abfd = section->get_bfd_owner (); |
dee91e82 | 6834 | struct dwarf2_cu *cu; |
c0ab21c2 | 6835 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6836 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6837 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6838 | /* Non-zero if CU currently points to a DWO file and we need to |
6839 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6840 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6841 | int rereading_dwo_cu = 0; |
c906108c | 6842 | |
b4f54984 | 6843 | if (dwarf_die_debug) |
9d8780f0 | 6844 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6845 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6846 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6847 | |
a2ce51a0 DE |
6848 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6849 | file (instead of going through the stub), short-circuit all of this. */ | |
6850 | if (this_cu->reading_dwo_directly) | |
6851 | { | |
6852 | /* Narrow down the scope of possibilities to have to understand. */ | |
6853 | gdb_assert (this_cu->is_debug_types); | |
6854 | gdb_assert (abbrev_table == NULL); | |
6751ebae | 6855 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu); |
a2ce51a0 DE |
6856 | return; |
6857 | } | |
6858 | ||
dee91e82 | 6859 | /* This is cheap if the section is already read in. */ |
96b79293 | 6860 | section->read (objfile); |
dee91e82 | 6861 | |
9c541725 | 6862 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6863 | |
6864 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6865 | |
6866 | if (use_existing_cu && this_cu->cu != NULL) | |
6867 | { | |
6868 | cu = this_cu->cu; | |
42e7ad6c DE |
6869 | /* If this CU is from a DWO file we need to start over, we need to |
6870 | refetch the attributes from the skeleton CU. | |
6871 | This could be optimized by retrieving those attributes from when we | |
6872 | were here the first time: the previous comp_unit_die was stored in | |
6873 | comp_unit_obstack. But there's no data yet that we need this | |
6874 | optimization. */ | |
6875 | if (cu->dwo_unit != NULL) | |
6876 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6877 | } |
6878 | else | |
6879 | { | |
6880 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6881 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 TT |
6882 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6883 | cu = m_new_cu.get (); | |
42e7ad6c | 6884 | } |
dee91e82 | 6885 | |
b0c7bfa9 | 6886 | /* Get the header. */ |
9c541725 | 6887 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6888 | { |
6889 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6890 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6891 | } |
6892 | else | |
6893 | { | |
3019eac3 | 6894 | if (this_cu->is_debug_types) |
dee91e82 | 6895 | { |
ed2dc618 SM |
6896 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6897 | &cu->header, section, | |
4bdcc0c1 | 6898 | abbrev_section, info_ptr, |
43988095 | 6899 | rcuh_kind::TYPE); |
dee91e82 | 6900 | |
42e7ad6c DE |
6901 | /* Since per_cu is the first member of struct signatured_type, |
6902 | we can go from a pointer to one to a pointer to the other. */ | |
6903 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6904 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6905 | gdb_assert (sig_type->type_offset_in_tu |
6906 | == cu->header.type_cu_offset_in_tu); | |
6907 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6908 | |
42e7ad6c DE |
6909 | /* LENGTH has not been set yet for type units if we're |
6910 | using .gdb_index. */ | |
4057dfde | 6911 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6912 | |
6913 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6914 | sig_type->type_offset_in_section = |
6915 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6916 | |
6917 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6918 | } |
6919 | else | |
6920 | { | |
ed2dc618 SM |
6921 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6922 | &cu->header, section, | |
4bdcc0c1 | 6923 | abbrev_section, |
43988095 JK |
6924 | info_ptr, |
6925 | rcuh_kind::COMPILE); | |
dee91e82 | 6926 | |
9c541725 | 6927 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
4057dfde | 6928 | gdb_assert (this_cu->length == cu->header.get_length ()); |
43988095 | 6929 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6930 | } |
6931 | } | |
10b3939b | 6932 | |
6caca83c | 6933 | /* Skip dummy compilation units. */ |
dee91e82 | 6934 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6935 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6936 | { |
6937 | dummy_p = true; | |
6938 | return; | |
6939 | } | |
6caca83c | 6940 | |
433df2d4 DE |
6941 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6942 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6943 | done. */ |
f4dc4d17 | 6944 | if (abbrev_table != NULL) |
685af9cd TT |
6945 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6946 | else | |
f4dc4d17 | 6947 | { |
c0ab21c2 | 6948 | m_abbrev_table_holder |
86de1d91 TT |
6949 | = abbrev_table::read (objfile, abbrev_section, |
6950 | cu->header.abbrev_sect_off); | |
c0ab21c2 | 6951 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6952 | } |
af703f96 | 6953 | |
dee91e82 | 6954 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6955 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 6956 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 6957 | |
58f0c718 | 6958 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
6959 | { |
6960 | dummy_p = true; | |
6961 | return; | |
6962 | } | |
58f0c718 | 6963 | |
b0c7bfa9 | 6964 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
6965 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
6966 | table from the DWO file and pass the ownership over to us. It will be | |
6967 | referenced from READER, so we must make sure to free it after we're done | |
6968 | with READER. | |
6969 | ||
b0c7bfa9 DE |
6970 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
6971 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 6972 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 6973 | if (dwo_name != nullptr) |
3019eac3 | 6974 | { |
3019eac3 | 6975 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6976 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 6977 | |
3e225074 | 6978 | if (comp_unit_die->has_children) |
6a506a2d | 6979 | { |
b98664d3 | 6980 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
6981 | " has children (offset %s) [in module %s]"), |
6982 | sect_offset_str (this_cu->sect_off), | |
6983 | bfd_get_filename (abfd)); | |
6a506a2d | 6984 | } |
c0ab21c2 | 6985 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die, dwo_name); |
6a506a2d | 6986 | if (dwo_unit != NULL) |
3019eac3 | 6987 | { |
6a506a2d | 6988 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 6989 | comp_unit_die, NULL, |
c0ab21c2 | 6990 | this, &info_ptr, |
3e225074 | 6991 | &dwo_comp_unit_die, |
c0ab21c2 | 6992 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
6993 | { |
6994 | /* Dummy die. */ | |
c0ab21c2 | 6995 | dummy_p = true; |
6a506a2d DE |
6996 | return; |
6997 | } | |
6998 | comp_unit_die = dwo_comp_unit_die; | |
6999 | } | |
7000 | else | |
7001 | { | |
7002 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7003 | the stub. A complaint has already been logged. There's | |
7004 | not much more we can do except pass on the stub DIE to | |
7005 | die_reader_func. We don't want to throw an error on bad | |
7006 | debug info. */ | |
3019eac3 DE |
7007 | } |
7008 | } | |
c0ab21c2 | 7009 | } |
3019eac3 | 7010 | |
6751ebae TT |
7011 | void |
7012 | cutu_reader::keep () | |
c0ab21c2 | 7013 | { |
b0c7bfa9 | 7014 | /* Done, clean up. */ |
6751ebae TT |
7015 | gdb_assert (!dummy_p); |
7016 | if (m_new_cu != NULL) | |
348e048f | 7017 | { |
c0ab21c2 TT |
7018 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7019 | = m_this_cu->dwarf2_per_objfile; | |
fcd3b13d | 7020 | /* Link this CU into read_in_chain. */ |
c0ab21c2 TT |
7021 | m_this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
7022 | dwarf2_per_objfile->read_in_chain = m_this_cu; | |
fcd3b13d | 7023 | /* The chain owns it now. */ |
c0ab21c2 | 7024 | m_new_cu.release (); |
348e048f | 7025 | } |
dee91e82 DE |
7026 | } |
7027 | ||
18a8505e AT |
7028 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
7029 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
7030 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7031 | |
7032 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7033 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7034 | |
7035 | We fill in THIS_CU->length. | |
7036 | ||
dee91e82 | 7037 | THIS_CU->cu is always freed when done. |
3019eac3 | 7038 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
7039 | to care whether it refers to the "main" CU or the DWO CU. |
7040 | ||
7041 | When parent_cu is passed, it is used to provide a default value for | |
7042 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 7043 | |
c0ab21c2 TT |
7044 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
7045 | struct dwarf2_cu *parent_cu, | |
7046 | struct dwo_file *dwo_file) | |
7047 | : die_reader_specs {}, | |
7048 | m_this_cu (this_cu) | |
dee91e82 | 7049 | { |
ed2dc618 | 7050 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7051 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7052 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 7053 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 7054 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7055 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7056 | |
b4f54984 | 7057 | if (dwarf_die_debug) |
9d8780f0 | 7058 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7059 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7060 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7061 | |
dee91e82 DE |
7062 | gdb_assert (this_cu->cu == NULL); |
7063 | ||
33e80786 DE |
7064 | abbrev_section = (dwo_file != NULL |
7065 | ? &dwo_file->sections.abbrev | |
7066 | : get_abbrev_section_for_cu (this_cu)); | |
7067 | ||
dee91e82 | 7068 | /* This is cheap if the section is already read in. */ |
96b79293 | 7069 | section->read (objfile); |
dee91e82 | 7070 | |
c0ab21c2 | 7071 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
dee91e82 | 7072 | |
9c541725 | 7073 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 | 7074 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
c0ab21c2 | 7075 | &m_new_cu->header, section, |
4bdcc0c1 | 7076 | abbrev_section, info_ptr, |
43988095 JK |
7077 | (this_cu->is_debug_types |
7078 | ? rcuh_kind::TYPE | |
7079 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7080 | |
18a8505e AT |
7081 | if (parent_cu != nullptr) |
7082 | { | |
c0ab21c2 TT |
7083 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
7084 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 7085 | } |
4057dfde | 7086 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
7087 | |
7088 | /* Skip dummy compilation units. */ | |
7089 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7090 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
7091 | { |
7092 | dummy_p = true; | |
7093 | return; | |
7094 | } | |
72bf9492 | 7095 | |
c0ab21c2 | 7096 | m_abbrev_table_holder |
86de1d91 TT |
7097 | = abbrev_table::read (objfile, abbrev_section, |
7098 | m_new_cu->header.abbrev_sect_off); | |
dee91e82 | 7099 | |
c0ab21c2 TT |
7100 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
7101 | m_abbrev_table_holder.get ()); | |
3e225074 | 7102 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
7103 | } |
7104 | ||
0018ea6f DE |
7105 | \f |
7106 | /* Type Unit Groups. | |
dee91e82 | 7107 | |
0018ea6f DE |
7108 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7109 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7110 | so that all types coming from the same compilation (.o file) are grouped | |
7111 | together. A future step could be to put the types in the same symtab as | |
7112 | the CU the types ultimately came from. */ | |
ff013f42 | 7113 | |
f4dc4d17 DE |
7114 | static hashval_t |
7115 | hash_type_unit_group (const void *item) | |
7116 | { | |
9a3c8263 SM |
7117 | const struct type_unit_group *tu_group |
7118 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7119 | |
094b34ac | 7120 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7121 | } |
348e048f DE |
7122 | |
7123 | static int | |
f4dc4d17 | 7124 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7125 | { |
9a3c8263 SM |
7126 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7127 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7128 | |
094b34ac | 7129 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7130 | } |
348e048f | 7131 | |
f4dc4d17 DE |
7132 | /* Allocate a hash table for type unit groups. */ |
7133 | ||
eaa5fa8b | 7134 | static htab_up |
298e9637 | 7135 | allocate_type_unit_groups_table () |
f4dc4d17 | 7136 | { |
eaa5fa8b TT |
7137 | return htab_up (htab_create_alloc (3, |
7138 | hash_type_unit_group, | |
7139 | eq_type_unit_group, | |
7140 | NULL, xcalloc, xfree)); | |
f4dc4d17 | 7141 | } |
dee91e82 | 7142 | |
f4dc4d17 DE |
7143 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7144 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7145 | of any one psymtab grow too big. */ | |
7146 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7147 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7148 | |
094b34ac | 7149 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7150 | Create the type_unit_group object used to hold one or more TUs. */ |
7151 | ||
7152 | static struct type_unit_group * | |
094b34ac | 7153 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7154 | { |
518817b3 SM |
7155 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7156 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7157 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7158 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7159 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7160 | |
7161 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7162 | struct type_unit_group); | |
094b34ac | 7163 | per_cu = &tu_group->per_cu; |
518817b3 | 7164 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7165 | |
094b34ac DE |
7166 | if (dwarf2_per_objfile->using_index) |
7167 | { | |
7168 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7169 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7170 | } |
7171 | else | |
7172 | { | |
9c541725 | 7173 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 7174 | dwarf2_psymtab *pst; |
528e1572 | 7175 | std::string name; |
094b34ac DE |
7176 | |
7177 | /* Give the symtab a useful name for debug purposes. */ | |
7178 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7179 | name = string_printf ("<type_units_%d>", |
7180 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7181 | else |
528e1572 | 7182 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7183 | |
528e1572 | 7184 | pst = create_partial_symtab (per_cu, name.c_str ()); |
6d94535f | 7185 | pst->anonymous = true; |
094b34ac | 7186 | } |
f4dc4d17 | 7187 | |
094b34ac | 7188 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7189 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7190 | |
7191 | return tu_group; | |
7192 | } | |
7193 | ||
094b34ac DE |
7194 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7195 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7196 | |
7197 | static struct type_unit_group * | |
ff39bb5e | 7198 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7199 | { |
518817b3 SM |
7200 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7201 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7202 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7203 | struct type_unit_group *tu_group; | |
7204 | void **slot; | |
7205 | unsigned int line_offset; | |
7206 | struct type_unit_group type_unit_group_for_lookup; | |
7207 | ||
7208 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
298e9637 | 7209 | dwarf2_per_objfile->type_unit_groups = allocate_type_unit_groups_table (); |
f4dc4d17 DE |
7210 | |
7211 | /* Do we need to create a new group, or can we use an existing one? */ | |
7212 | ||
7213 | if (stmt_list) | |
7214 | { | |
7215 | line_offset = DW_UNSND (stmt_list); | |
7216 | ++tu_stats->nr_symtab_sharers; | |
7217 | } | |
7218 | else | |
7219 | { | |
7220 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7221 | We can do various things here like create one group per TU or | |
7222 | spread them over multiple groups to split up the expansion work. | |
7223 | To avoid worst case scenarios (too many groups or too large groups) | |
7224 | we, umm, group them in bunches. */ | |
7225 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7226 | | (tu_stats->nr_stmt_less_type_units | |
7227 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7228 | ++tu_stats->nr_stmt_less_type_units; | |
7229 | } | |
7230 | ||
094b34ac | 7231 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7232 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
eaa5fa8b | 7233 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups.get (), |
f4dc4d17 DE |
7234 | &type_unit_group_for_lookup, INSERT); |
7235 | if (*slot != NULL) | |
7236 | { | |
9a3c8263 | 7237 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7238 | gdb_assert (tu_group != NULL); |
7239 | } | |
7240 | else | |
7241 | { | |
9c541725 | 7242 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7243 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7244 | *slot = tu_group; |
7245 | ++tu_stats->nr_symtabs; | |
7246 | } | |
7247 | ||
7248 | return tu_group; | |
7249 | } | |
0018ea6f DE |
7250 | \f |
7251 | /* Partial symbol tables. */ | |
7252 | ||
7253 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7254 | ||
7255 | The caller must fill in the following details: | |
7256 | dirname, textlow, texthigh. */ | |
7257 | ||
891813be | 7258 | static dwarf2_psymtab * |
0018ea6f DE |
7259 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
7260 | { | |
e3b94546 | 7261 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
891813be | 7262 | dwarf2_psymtab *pst; |
0018ea6f | 7263 | |
891813be | 7264 | pst = new dwarf2_psymtab (name, objfile, 0); |
0018ea6f | 7265 | |
6d94535f | 7266 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
7267 | |
7268 | /* This is the glue that links PST into GDB's symbol API. */ | |
891813be | 7269 | pst->per_cu_data = per_cu; |
0018ea6f DE |
7270 | per_cu->v.psymtab = pst; |
7271 | ||
7272 | return pst; | |
7273 | } | |
7274 | ||
c0ab21c2 | 7275 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
7276 | |
7277 | static void | |
7278 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7279 | const gdb_byte *info_ptr, |
0018ea6f | 7280 | struct die_info *comp_unit_die, |
c0ab21c2 | 7281 | enum language pretend_language) |
0018ea6f DE |
7282 | { |
7283 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7284 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 7285 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7286 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7287 | CORE_ADDR baseaddr; |
7288 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 7289 | dwarf2_psymtab *pst; |
3a2b436a | 7290 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7291 | const char *filename; |
0018ea6f | 7292 | |
0018ea6f DE |
7293 | gdb_assert (! per_cu->is_debug_types); |
7294 | ||
c0ab21c2 | 7295 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 7296 | |
0018ea6f | 7297 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
7298 | gdb::unique_xmalloc_ptr<char> debug_filename; |
7299 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
7300 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7301 | if (filename == NULL) | |
0018ea6f | 7302 | filename = ""; |
2e927613 TV |
7303 | else if (strcmp (filename, artificial) == 0) |
7304 | { | |
7305 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
7306 | sect_offset_str (per_cu->sect_off), |
7307 | (char *) NULL)); | |
2e927613 TV |
7308 | filename = debug_filename.get (); |
7309 | } | |
0018ea6f DE |
7310 | |
7311 | pst = create_partial_symtab (per_cu, filename); | |
7312 | ||
7313 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7314 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 7315 | |
b3b3bada | 7316 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
7317 | |
7318 | dwarf2_find_base_address (comp_unit_die, cu); | |
7319 | ||
7320 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7321 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7322 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7323 | &best_highpc, cu, pst); | |
7324 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
7325 | { |
7326 | CORE_ADDR low | |
7327 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
7328 | - baseaddr); | |
7329 | CORE_ADDR high | |
7330 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
7331 | - baseaddr - 1); | |
7332 | /* Store the contiguous range if it is not empty; it can be | |
7333 | empty for CUs with no code. */ | |
d320c2b5 TT |
7334 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
7335 | low, high, pst); | |
79748972 | 7336 | } |
0018ea6f DE |
7337 | |
7338 | /* Check if comp unit has_children. | |
7339 | If so, read the rest of the partial symbols from this comp unit. | |
7340 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7341 | if (comp_unit_die->has_children) |
0018ea6f DE |
7342 | { |
7343 | struct partial_die_info *first_die; | |
7344 | CORE_ADDR lowpc, highpc; | |
7345 | ||
7346 | lowpc = ((CORE_ADDR) -1); | |
7347 | highpc = ((CORE_ADDR) 0); | |
7348 | ||
7349 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7350 | ||
7351 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7352 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7353 | |
7354 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7355 | complaints from `maint check'. */ | |
7356 | if (lowpc == ((CORE_ADDR) -1)) | |
7357 | lowpc = highpc; | |
7358 | ||
7359 | /* If the compilation unit didn't have an explicit address range, | |
7360 | then use the information extracted from its child dies. */ | |
e385593e | 7361 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7362 | { |
7363 | best_lowpc = lowpc; | |
7364 | best_highpc = highpc; | |
7365 | } | |
7366 | } | |
4ae976d1 | 7367 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7368 | best_lowpc + baseaddr) |
7369 | - baseaddr); | |
4ae976d1 | 7370 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7371 | best_highpc + baseaddr) |
7372 | - baseaddr); | |
0018ea6f | 7373 | |
8763cede | 7374 | end_psymtab_common (objfile, pst); |
0018ea6f | 7375 | |
ae640021 | 7376 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
7377 | { |
7378 | int i; | |
ae640021 | 7379 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
7380 | |
7381 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7382 | post-pass. */ | |
7383 | pst->number_of_dependencies = len; | |
a9342b62 TT |
7384 | pst->dependencies |
7385 | = objfile->partial_symtabs->allocate_dependencies (len); | |
ae640021 AB |
7386 | for (i = 0; i < len; ++i) |
7387 | { | |
7388 | pst->dependencies[i] | |
7389 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
7390 | } | |
0018ea6f | 7391 | |
ae640021 | 7392 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
7393 | } |
7394 | ||
7395 | /* Get the list of files included in the current compilation unit, | |
7396 | and build a psymtab for each of them. */ | |
7397 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7398 | ||
b4f54984 | 7399 | if (dwarf_read_debug) |
b926417a TT |
7400 | fprintf_unfiltered (gdb_stdlog, |
7401 | "Psymtab for %s unit @%s: %s - %s" | |
7402 | ", %d global, %d static syms\n", | |
7403 | per_cu->is_debug_types ? "type" : "comp", | |
7404 | sect_offset_str (per_cu->sect_off), | |
7405 | paddress (gdbarch, pst->text_low (objfile)), | |
7406 | paddress (gdbarch, pst->text_high (objfile)), | |
7407 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
7408 | } |
7409 | ||
7410 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7411 | Process compilation unit THIS_CU for a psymtab. */ | |
7412 | ||
7413 | static void | |
7414 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
135f5437 | 7415 | bool want_partial_unit, |
b93601f3 | 7416 | enum language pretend_language) |
0018ea6f DE |
7417 | { |
7418 | /* If this compilation unit was already read in, free the | |
7419 | cached copy in order to read it in again. This is | |
7420 | necessary because we skipped some symbols when we first | |
7421 | read in the compilation unit (see load_partial_dies). | |
7422 | This problem could be avoided, but the benefit is unclear. */ | |
7423 | if (this_cu->cu != NULL) | |
7424 | free_one_cached_comp_unit (this_cu); | |
7425 | ||
6751ebae | 7426 | cutu_reader reader (this_cu, NULL, 0, false); |
c0ab21c2 TT |
7427 | |
7428 | if (reader.dummy_p) | |
f1902523 | 7429 | { |
c0ab21c2 | 7430 | /* Nothing. */ |
f1902523 | 7431 | } |
c0ab21c2 | 7432 | else if (this_cu->is_debug_types) |
3e225074 TT |
7433 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7434 | reader.comp_unit_die); | |
135f5437 TT |
7435 | else if (want_partial_unit |
7436 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7437 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7438 | reader.comp_unit_die, | |
c0ab21c2 | 7439 | pretend_language); |
0018ea6f DE |
7440 | |
7441 | /* Age out any secondary CUs. */ | |
ed2dc618 | 7442 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 7443 | } |
f4dc4d17 DE |
7444 | |
7445 | /* Reader function for build_type_psymtabs. */ | |
7446 | ||
7447 | static void | |
7448 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7449 | const gdb_byte *info_ptr, |
3e225074 | 7450 | struct die_info *type_unit_die) |
f4dc4d17 | 7451 | { |
ed2dc618 | 7452 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 7453 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
7454 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7455 | struct dwarf2_cu *cu = reader->cu; | |
7456 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7457 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7458 | struct type_unit_group *tu_group; |
7459 | struct attribute *attr; | |
7460 | struct partial_die_info *first_die; | |
7461 | CORE_ADDR lowpc, highpc; | |
891813be | 7462 | dwarf2_psymtab *pst; |
f4dc4d17 | 7463 | |
0186c6a7 DE |
7464 | gdb_assert (per_cu->is_debug_types); |
7465 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7466 | |
3e225074 | 7467 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7468 | return; |
7469 | ||
7470 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7471 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7472 | |
df07e2c7 | 7473 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7474 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7475 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7476 | |
7477 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 | 7478 | pst = create_partial_symtab (per_cu, ""); |
6d94535f | 7479 | pst->anonymous = true; |
f4dc4d17 DE |
7480 | |
7481 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7482 | ||
7483 | lowpc = (CORE_ADDR) -1; | |
7484 | highpc = (CORE_ADDR) 0; | |
7485 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7486 | ||
8763cede | 7487 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7488 | } |
7489 | ||
73051182 DE |
7490 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7491 | ||
7492 | struct tu_abbrev_offset | |
7493 | { | |
b2bdb8cf SM |
7494 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7495 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7496 | {} | |
7497 | ||
7498 | signatured_type *sig_type; | |
73051182 DE |
7499 | sect_offset abbrev_offset; |
7500 | }; | |
7501 | ||
484cf504 | 7502 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 7503 | |
484cf504 TT |
7504 | static bool |
7505 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
7506 | const struct tu_abbrev_offset &b) | |
73051182 | 7507 | { |
484cf504 | 7508 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
7509 | } |
7510 | ||
7511 | /* Efficiently read all the type units. | |
7512 | This does the bulk of the work for build_type_psymtabs. | |
7513 | ||
7514 | The efficiency is because we sort TUs by the abbrev table they use and | |
7515 | only read each abbrev table once. In one program there are 200K TUs | |
7516 | sharing 8K abbrev tables. | |
7517 | ||
7518 | The main purpose of this function is to support building the | |
7519 | dwarf2_per_objfile->type_unit_groups table. | |
7520 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7521 | can collapse the search space by grouping them by stmt_list. | |
7522 | The savings can be significant, in the same program from above the 200K TUs | |
7523 | share 8K stmt_list tables. | |
7524 | ||
7525 | FUNC is expected to call get_type_unit_group, which will create the | |
7526 | struct type_unit_group if necessary and add it to | |
7527 | dwarf2_per_objfile->type_unit_groups. */ | |
7528 | ||
7529 | static void | |
ed2dc618 | 7530 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 7531 | { |
73051182 | 7532 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 7533 | abbrev_table_up abbrev_table; |
73051182 | 7534 | sect_offset abbrev_offset; |
73051182 DE |
7535 | |
7536 | /* It's up to the caller to not call us multiple times. */ | |
7537 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7538 | ||
b2bdb8cf | 7539 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
7540 | return; |
7541 | ||
7542 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7543 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7544 | read each abbrev table in. | |
7545 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7546 | This is simpler and efficient enough for now. | |
7547 | ||
7548 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7549 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7550 | stmt_list value too so in practice this should work well. | |
7551 | ||
7552 | The basic algorithm here is: | |
7553 | ||
7554 | sort TUs by abbrev table | |
7555 | for each TU with same abbrev table: | |
7556 | read abbrev table if first user | |
7557 | read TU top level DIE | |
7558 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7559 | call FUNC */ | |
7560 | ||
b4f54984 | 7561 | if (dwarf_read_debug) |
73051182 DE |
7562 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7563 | ||
7564 | /* Sort in a separate table to maintain the order of all_type_units | |
7565 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
7566 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
7567 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
7568 | ||
7569 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
7570 | sorted_by_abbrev.emplace_back | |
7571 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
7572 | sig_type->per_cu.section, | |
7573 | sig_type->per_cu.sect_off)); | |
73051182 | 7574 | |
484cf504 TT |
7575 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
7576 | sort_tu_by_abbrev_offset); | |
73051182 | 7577 | |
9c541725 | 7578 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7579 | |
b2bdb8cf | 7580 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7581 | { |
73051182 DE |
7582 | /* Switch to the next abbrev table if necessary. */ |
7583 | if (abbrev_table == NULL | |
b2bdb8cf | 7584 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7585 | { |
b2bdb8cf | 7586 | abbrev_offset = tu.abbrev_offset; |
73051182 | 7587 | abbrev_table = |
86de1d91 TT |
7588 | abbrev_table::read (dwarf2_per_objfile->objfile, |
7589 | &dwarf2_per_objfile->abbrev, | |
7590 | abbrev_offset); | |
73051182 DE |
7591 | ++tu_stats->nr_uniq_abbrev_tables; |
7592 | } | |
7593 | ||
c0ab21c2 | 7594 | cutu_reader reader (&tu.sig_type->per_cu, abbrev_table.get (), |
6751ebae | 7595 | 0, false); |
c0ab21c2 TT |
7596 | if (!reader.dummy_p) |
7597 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7598 | reader.comp_unit_die); |
73051182 | 7599 | } |
6aa5f3a6 | 7600 | } |
73051182 | 7601 | |
6aa5f3a6 DE |
7602 | /* Print collected type unit statistics. */ |
7603 | ||
7604 | static void | |
ed2dc618 | 7605 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7606 | { |
7607 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7608 | ||
7609 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
7610 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
7611 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
7612 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
7613 | tu_stats->nr_uniq_abbrev_tables); | |
7614 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7615 | tu_stats->nr_symtabs); | |
7616 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7617 | tu_stats->nr_symtab_sharers); | |
7618 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7619 | tu_stats->nr_stmt_less_type_units); | |
7620 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7621 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7622 | } |
7623 | ||
f4dc4d17 DE |
7624 | /* Traversal function for build_type_psymtabs. */ |
7625 | ||
7626 | static int | |
7627 | build_type_psymtab_dependencies (void **slot, void *info) | |
7628 | { | |
ed2dc618 SM |
7629 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7630 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
7631 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7632 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7633 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
891813be | 7634 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
df07e2c7 | 7635 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7636 | int i; |
7637 | ||
7638 | gdb_assert (len > 0); | |
197400e8 | 7639 | gdb_assert (per_cu->type_unit_group_p ()); |
f4dc4d17 DE |
7640 | |
7641 | pst->number_of_dependencies = len; | |
a9342b62 | 7642 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7643 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7644 | { |
df07e2c7 | 7645 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
7646 | gdb_assert (iter->per_cu.is_debug_types); |
7647 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7648 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7649 | } |
7650 | ||
df07e2c7 AB |
7651 | delete tu_group->tus; |
7652 | tu_group->tus = nullptr; | |
348e048f DE |
7653 | |
7654 | return 1; | |
7655 | } | |
7656 | ||
7657 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7658 | Build partial symbol tables for the .debug_types comp-units. */ | |
7659 | ||
7660 | static void | |
ed2dc618 | 7661 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 7662 | { |
ed2dc618 | 7663 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
7664 | return; |
7665 | ||
ed2dc618 | 7666 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 7667 | } |
f4dc4d17 | 7668 | |
6aa5f3a6 DE |
7669 | /* Traversal function for process_skeletonless_type_unit. |
7670 | Read a TU in a DWO file and build partial symbols for it. */ | |
7671 | ||
7672 | static int | |
7673 | process_skeletonless_type_unit (void **slot, void *info) | |
7674 | { | |
7675 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
7676 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7677 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
7678 | struct signatured_type find_entry, *entry; |
7679 | ||
7680 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7681 | ||
7682 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 7683 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
6aa5f3a6 DE |
7684 | |
7685 | find_entry.signature = dwo_unit->signature; | |
b0b6a987 TT |
7686 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
7687 | &find_entry, INSERT); | |
6aa5f3a6 DE |
7688 | /* If we've already seen this type there's nothing to do. What's happening |
7689 | is we're doing our own version of comdat-folding here. */ | |
7690 | if (*slot != NULL) | |
7691 | return 1; | |
7692 | ||
7693 | /* This does the job that create_all_type_units would have done for | |
7694 | this TU. */ | |
ed2dc618 SM |
7695 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
7696 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7697 | *slot = entry; |
7698 | ||
7699 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6751ebae | 7700 | cutu_reader reader (&entry->per_cu, NULL, 0, false); |
c0ab21c2 TT |
7701 | if (!reader.dummy_p) |
7702 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7703 | reader.comp_unit_die); |
6aa5f3a6 DE |
7704 | |
7705 | return 1; | |
7706 | } | |
7707 | ||
7708 | /* Traversal function for process_skeletonless_type_units. */ | |
7709 | ||
7710 | static int | |
7711 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7712 | { | |
7713 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7714 | ||
7715 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7716 | htab_traverse_noresize (dwo_file->tus.get (), |
7717 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7718 | |
7719 | return 1; | |
7720 | } | |
7721 | ||
7722 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7723 | This is needed in case a TU was emitted without its skeleton. | |
7724 | Note: This can't be done until we know what all the DWO files are. */ | |
7725 | ||
7726 | static void | |
ed2dc618 | 7727 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7728 | { |
7729 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 7730 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
7731 | && dwarf2_per_objfile->dwo_files != NULL) |
7732 | { | |
51ac9db5 | 7733 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 7734 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 7735 | dwarf2_per_objfile); |
6aa5f3a6 | 7736 | } |
348e048f DE |
7737 | } |
7738 | ||
ed2dc618 | 7739 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7740 | |
7741 | static void | |
ed2dc618 | 7742 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 7743 | { |
b76e467d | 7744 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 7745 | { |
891813be | 7746 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7747 | |
36586728 TT |
7748 | if (pst == NULL) |
7749 | continue; | |
7750 | ||
b76e467d | 7751 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7752 | { |
7753 | /* Set the 'user' field only if it is not already set. */ | |
7754 | if (pst->dependencies[j]->user == NULL) | |
7755 | pst->dependencies[j]->user = pst; | |
7756 | } | |
7757 | } | |
7758 | } | |
7759 | ||
93311388 DE |
7760 | /* Build the partial symbol table by doing a quick pass through the |
7761 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7762 | |
93311388 | 7763 | static void |
ed2dc618 | 7764 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 7765 | { |
ed2dc618 | 7766 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 7767 | |
b4f54984 | 7768 | if (dwarf_read_debug) |
45cfd468 DE |
7769 | { |
7770 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7771 | objfile_name (objfile)); |
45cfd468 DE |
7772 | } |
7773 | ||
76935768 TT |
7774 | scoped_restore restore_reading_psyms |
7775 | = make_scoped_restore (&dwarf2_per_objfile->reading_partial_symbols, | |
7776 | true); | |
98bfdba5 | 7777 | |
96b79293 | 7778 | dwarf2_per_objfile->info.read (objfile); |
91c24f0a | 7779 | |
93311388 DE |
7780 | /* Any cached compilation units will be linked by the per-objfile |
7781 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 7782 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 7783 | |
ed2dc618 | 7784 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 7785 | |
ed2dc618 | 7786 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 7787 | |
60606b2c TT |
7788 | /* Create a temporary address map on a temporary obstack. We later |
7789 | copy this to the final obstack. */ | |
8268c778 | 7790 | auto_obstack temp_obstack; |
791afaa2 TT |
7791 | |
7792 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 7793 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7794 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7795 | |
b76e467d | 7796 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
135f5437 | 7797 | process_psymtab_comp_unit (per_cu, false, language_minimal); |
ff013f42 | 7798 | |
6aa5f3a6 | 7799 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 7800 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
7801 | |
7802 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7803 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7804 | { | |
eaa5fa8b | 7805 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups.get (), |
ed2dc618 | 7806 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
7807 | } |
7808 | ||
b4f54984 | 7809 | if (dwarf_read_debug) |
ed2dc618 | 7810 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 7811 | |
ed2dc618 | 7812 | set_partial_user (dwarf2_per_objfile); |
95554aad | 7813 | |
d320c2b5 TT |
7814 | objfile->partial_symtabs->psymtabs_addrmap |
7815 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 7816 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
7817 | /* At this point we want to keep the address map. */ |
7818 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7819 | |
b4f54984 | 7820 | if (dwarf_read_debug) |
45cfd468 | 7821 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7822 | objfile_name (objfile)); |
ae038cb0 DJ |
7823 | } |
7824 | ||
dee91e82 DE |
7825 | /* Load the partial DIEs for a secondary CU into memory. |
7826 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7827 | |
dee91e82 DE |
7828 | static void |
7829 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7830 | { | |
6751ebae | 7831 | cutu_reader reader (this_cu, NULL, 1, false); |
c0ab21c2 TT |
7832 | |
7833 | if (!reader.dummy_p) | |
7834 | { | |
7835 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7836 | language_minimal); | |
7837 | ||
7838 | /* Check if comp unit has_children. | |
7839 | If so, read the rest of the partial symbols from this comp unit. | |
7840 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7841 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7842 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7843 | |
7844 | reader.keep (); | |
c0ab21c2 | 7845 | } |
ae038cb0 DJ |
7846 | } |
7847 | ||
ae038cb0 | 7848 | static void |
ed2dc618 | 7849 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 7850 | struct dwarf2_section_info *section, |
f1902523 | 7851 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 7852 | unsigned int is_dwz) |
ae038cb0 | 7853 | { |
d521ce57 | 7854 | const gdb_byte *info_ptr; |
ed2dc618 | 7855 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 7856 | |
b4f54984 | 7857 | if (dwarf_read_debug) |
bf6af496 | 7858 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
96b79293 TT |
7859 | section->get_name (), |
7860 | section->get_file_name ()); | |
bf6af496 | 7861 | |
96b79293 | 7862 | section->read (objfile); |
ae038cb0 | 7863 | |
36586728 | 7864 | info_ptr = section->buffer; |
6e70227d | 7865 | |
36586728 | 7866 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7867 | { |
ae038cb0 | 7868 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7869 | |
9c541725 | 7870 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7871 | |
f1902523 | 7872 | comp_unit_head cu_header; |
ed2dc618 SM |
7873 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
7874 | abbrev_section, info_ptr, | |
7875 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7876 | |
7877 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7878 | if (cu_header.unit_type != DW_UT_type) |
7879 | { | |
7880 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7881 | struct dwarf2_per_cu_data); | |
7882 | memset (this_cu, 0, sizeof (*this_cu)); | |
7883 | } | |
7884 | else | |
7885 | { | |
7886 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7887 | struct signatured_type); | |
7888 | memset (sig_type, 0, sizeof (*sig_type)); | |
7889 | sig_type->signature = cu_header.signature; | |
7890 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7891 | this_cu = &sig_type->per_cu; | |
7892 | } | |
7893 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7894 | this_cu->sect_off = sect_off; |
f1902523 | 7895 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7896 | this_cu->is_dwz = is_dwz; |
e3b94546 | 7897 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 7898 | this_cu->section = section; |
ae038cb0 | 7899 | |
b76e467d | 7900 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
7901 | |
7902 | info_ptr = info_ptr + this_cu->length; | |
7903 | } | |
36586728 TT |
7904 | } |
7905 | ||
7906 | /* Create a list of all compilation units in OBJFILE. | |
7907 | This is only done for -readnow and building partial symtabs. */ | |
7908 | ||
7909 | static void | |
ed2dc618 | 7910 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 7911 | { |
b76e467d | 7912 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 7913 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 7914 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 7915 | |
b76e467d | 7916 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 7917 | if (dwz != NULL) |
ed2dc618 | 7918 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 7919 | 1); |
c906108c SS |
7920 | } |
7921 | ||
5734ee8b | 7922 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7923 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7924 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7925 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7926 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7927 | |
72bf9492 DJ |
7928 | static void |
7929 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7930 | CORE_ADDR *highpc, int set_addrmap, |
7931 | struct dwarf2_cu *cu) | |
c906108c | 7932 | { |
72bf9492 | 7933 | struct partial_die_info *pdi; |
c906108c | 7934 | |
91c24f0a DC |
7935 | /* Now, march along the PDI's, descending into ones which have |
7936 | interesting children but skipping the children of the other ones, | |
7937 | until we reach the end of the compilation unit. */ | |
c906108c | 7938 | |
72bf9492 | 7939 | pdi = first_die; |
91c24f0a | 7940 | |
72bf9492 DJ |
7941 | while (pdi != NULL) |
7942 | { | |
52356b79 | 7943 | pdi->fixup (cu); |
c906108c | 7944 | |
f55ee35c | 7945 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7946 | children, so we need to look at them. Ditto for anonymous |
7947 | enums. */ | |
933c6fe4 | 7948 | |
72bf9492 | 7949 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 7950 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
7951 | || pdi->tag == DW_TAG_imported_unit |
7952 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 7953 | { |
72bf9492 | 7954 | switch (pdi->tag) |
c906108c SS |
7955 | { |
7956 | case DW_TAG_subprogram: | |
b1dc1806 | 7957 | case DW_TAG_inlined_subroutine: |
cdc07690 | 7958 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7959 | break; |
72929c62 | 7960 | case DW_TAG_constant: |
c906108c SS |
7961 | case DW_TAG_variable: |
7962 | case DW_TAG_typedef: | |
91c24f0a | 7963 | case DW_TAG_union_type: |
72bf9492 | 7964 | if (!pdi->is_declaration) |
63d06c5c | 7965 | { |
72bf9492 | 7966 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7967 | } |
7968 | break; | |
c906108c | 7969 | case DW_TAG_class_type: |
680b30c7 | 7970 | case DW_TAG_interface_type: |
c906108c | 7971 | case DW_TAG_structure_type: |
72bf9492 | 7972 | if (!pdi->is_declaration) |
c906108c | 7973 | { |
72bf9492 | 7974 | add_partial_symbol (pdi, cu); |
c906108c | 7975 | } |
b7fee5a3 KS |
7976 | if ((cu->language == language_rust |
7977 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
7978 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
7979 | set_addrmap, cu); | |
c906108c | 7980 | break; |
91c24f0a | 7981 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7982 | if (!pdi->is_declaration) |
7983 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7984 | break; |
7985 | case DW_TAG_base_type: | |
a02abb62 | 7986 | case DW_TAG_subrange_type: |
c906108c | 7987 | /* File scope base type definitions are added to the partial |
c5aa993b | 7988 | symbol table. */ |
72bf9492 | 7989 | add_partial_symbol (pdi, cu); |
c906108c | 7990 | break; |
d9fa45fe | 7991 | case DW_TAG_namespace: |
cdc07690 | 7992 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7993 | break; |
5d7cb8df | 7994 | case DW_TAG_module: |
59c35742 AB |
7995 | if (!pdi->is_declaration) |
7996 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 7997 | break; |
95554aad TT |
7998 | case DW_TAG_imported_unit: |
7999 | { | |
8000 | struct dwarf2_per_cu_data *per_cu; | |
8001 | ||
f4dc4d17 DE |
8002 | /* For now we don't handle imported units in type units. */ |
8003 | if (cu->per_cu->is_debug_types) | |
8004 | { | |
8005 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8006 | " supported in type units [in module %s]"), | |
518817b3 | 8007 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8008 | } |
8009 | ||
e3b94546 SM |
8010 | per_cu = dwarf2_find_containing_comp_unit |
8011 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8012 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8013 | |
8014 | /* Go read the partial unit, if needed. */ | |
8015 | if (per_cu->v.psymtab == NULL) | |
135f5437 | 8016 | process_psymtab_comp_unit (per_cu, true, cu->language); |
95554aad | 8017 | |
ae640021 | 8018 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
8019 | } |
8020 | break; | |
74921315 KS |
8021 | case DW_TAG_imported_declaration: |
8022 | add_partial_symbol (pdi, cu); | |
8023 | break; | |
c906108c SS |
8024 | default: |
8025 | break; | |
8026 | } | |
8027 | } | |
8028 | ||
72bf9492 DJ |
8029 | /* If the die has a sibling, skip to the sibling. */ |
8030 | ||
8031 | pdi = pdi->die_sibling; | |
8032 | } | |
8033 | } | |
8034 | ||
8035 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8036 | |
72bf9492 | 8037 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8038 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8039 | Enumerators are an exception; they use the scope of their parent |
8040 | enumeration type, i.e. the name of the enumeration type is not | |
8041 | prepended to the enumerator. | |
91c24f0a | 8042 | |
72bf9492 DJ |
8043 | There are two complexities. One is DW_AT_specification; in this |
8044 | case "parent" means the parent of the target of the specification, | |
8045 | instead of the direct parent of the DIE. The other is compilers | |
8046 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8047 | the fully qualified name of structure types from their members' | |
8048 | linkage names. This must be done using the DIE's children rather | |
8049 | than the children of any DW_AT_specification target. We only need | |
8050 | to do this for structures at the top level, i.e. if the target of | |
8051 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8052 | have a parent. */ | |
8053 | ||
8054 | /* Compute the scope prefix associated with PDI's parent, in | |
8055 | compilation unit CU. The result will be allocated on CU's | |
8056 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8057 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8058 | static const char * |
72bf9492 DJ |
8059 | partial_die_parent_scope (struct partial_die_info *pdi, |
8060 | struct dwarf2_cu *cu) | |
8061 | { | |
15d034d0 | 8062 | const char *grandparent_scope; |
72bf9492 | 8063 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8064 | |
72bf9492 DJ |
8065 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8066 | then this means the parent of the specification DIE. */ | |
8067 | ||
8068 | real_pdi = pdi; | |
72bf9492 | 8069 | while (real_pdi->has_specification) |
fb816e8b | 8070 | { |
122cf0f2 AB |
8071 | auto res = find_partial_die (real_pdi->spec_offset, |
8072 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8073 | real_pdi = res.pdi; |
8074 | cu = res.cu; | |
8075 | } | |
72bf9492 DJ |
8076 | |
8077 | parent = real_pdi->die_parent; | |
8078 | if (parent == NULL) | |
8079 | return NULL; | |
8080 | ||
8081 | if (parent->scope_set) | |
8082 | return parent->scope; | |
8083 | ||
52356b79 | 8084 | parent->fixup (cu); |
72bf9492 | 8085 | |
10b3939b | 8086 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8087 | |
acebe513 UW |
8088 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8089 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8090 | Work around this problem here. */ | |
8091 | if (cu->language == language_cplus | |
6e70227d | 8092 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8093 | && strcmp (parent->name, "::") == 0 |
8094 | && grandparent_scope == NULL) | |
8095 | { | |
8096 | parent->scope = NULL; | |
8097 | parent->scope_set = 1; | |
8098 | return NULL; | |
8099 | } | |
8100 | ||
0a4b0913 | 8101 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8102 | if (pdi->tag == DW_TAG_enumerator) |
8103 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8104 | parent->scope = grandparent_scope; | |
8105 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8106 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8107 | || parent->tag == DW_TAG_structure_type |
8108 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8109 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8110 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8111 | || parent->tag == DW_TAG_enumeration_type |
8112 | || (cu->language == language_fortran | |
8113 | && parent->tag == DW_TAG_subprogram | |
8114 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8115 | { |
8116 | if (grandparent_scope == NULL) | |
8117 | parent->scope = parent->name; | |
8118 | else | |
3e43a32a MS |
8119 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8120 | grandparent_scope, | |
f55ee35c | 8121 | parent->name, 0, cu); |
72bf9492 | 8122 | } |
72bf9492 DJ |
8123 | else |
8124 | { | |
8125 | /* FIXME drow/2004-04-01: What should we be doing with | |
8126 | function-local names? For partial symbols, we should probably be | |
8127 | ignoring them. */ | |
fa9c3fa0 TT |
8128 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8129 | dwarf_tag_name (parent->tag), | |
8130 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8131 | parent->scope = grandparent_scope; |
c906108c SS |
8132 | } |
8133 | ||
72bf9492 DJ |
8134 | parent->scope_set = 1; |
8135 | return parent->scope; | |
8136 | } | |
8137 | ||
8138 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8139 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8140 | |
43816ebc | 8141 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
8142 | partial_die_full_name (struct partial_die_info *pdi, |
8143 | struct dwarf2_cu *cu) | |
8144 | { | |
15d034d0 | 8145 | const char *parent_scope; |
72bf9492 | 8146 | |
98bfdba5 PA |
8147 | /* If this is a template instantiation, we can not work out the |
8148 | template arguments from partial DIEs. So, unfortunately, we have | |
8149 | to go through the full DIEs. At least any work we do building | |
8150 | types here will be reused if full symbols are loaded later. */ | |
8151 | if (pdi->has_template_arguments) | |
8152 | { | |
52356b79 | 8153 | pdi->fixup (cu); |
98bfdba5 PA |
8154 | |
8155 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8156 | { | |
8157 | struct die_info *die; | |
8158 | struct attribute attr; | |
8159 | struct dwarf2_cu *ref_cu = cu; | |
8160 | ||
b64f50a1 | 8161 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8162 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8163 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8164 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8165 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8166 | ||
43816ebc | 8167 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
8168 | } |
8169 | } | |
8170 | ||
72bf9492 DJ |
8171 | parent_scope = partial_die_parent_scope (pdi, cu); |
8172 | if (parent_scope == NULL) | |
8173 | return NULL; | |
8174 | else | |
43816ebc TT |
8175 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
8176 | pdi->name, 0, cu)); | |
c906108c SS |
8177 | } |
8178 | ||
8179 | static void | |
72bf9492 | 8180 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8181 | { |
518817b3 SM |
8182 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8183 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8184 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8185 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8186 | CORE_ADDR addr = 0; |
15d034d0 | 8187 | const char *actual_name = NULL; |
e142c38c DJ |
8188 | CORE_ADDR baseaddr; |
8189 | ||
b3b3bada | 8190 | baseaddr = objfile->text_section_offset (); |
c906108c | 8191 | |
43816ebc TT |
8192 | gdb::unique_xmalloc_ptr<char> built_actual_name |
8193 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 8194 | if (built_actual_name != NULL) |
43816ebc | 8195 | actual_name = built_actual_name.get (); |
63d06c5c | 8196 | |
72bf9492 DJ |
8197 | if (actual_name == NULL) |
8198 | actual_name = pdi->name; | |
8199 | ||
c906108c SS |
8200 | switch (pdi->tag) |
8201 | { | |
b1dc1806 | 8202 | case DW_TAG_inlined_subroutine: |
c906108c | 8203 | case DW_TAG_subprogram: |
79748972 TT |
8204 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8205 | - baseaddr); | |
0a4b0913 AB |
8206 | if (pdi->is_external |
8207 | || cu->language == language_ada | |
8208 | || (cu->language == language_fortran | |
8209 | && pdi->die_parent != NULL | |
8210 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8211 | { | |
8212 | /* Normally, only "external" DIEs are part of the global scope. | |
8213 | But in Ada and Fortran, we want to be able to access nested | |
8214 | procedures globally. So all Ada and Fortran subprograms are | |
8215 | stored in the global scope. */ | |
31edb802 | 8216 | add_psymbol_to_list (actual_name, |
15d034d0 | 8217 | built_actual_name != NULL, |
f47fb265 | 8218 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8219 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8220 | psymbol_placement::GLOBAL, |
79748972 TT |
8221 | addr, |
8222 | cu->language, objfile); | |
c906108c SS |
8223 | } |
8224 | else | |
8225 | { | |
31edb802 | 8226 | add_psymbol_to_list (actual_name, |
15d034d0 | 8227 | built_actual_name != NULL, |
f47fb265 | 8228 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8229 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8230 | psymbol_placement::STATIC, |
1762568f | 8231 | addr, cu->language, objfile); |
c906108c | 8232 | } |
0c1b455e TT |
8233 | |
8234 | if (pdi->main_subprogram && actual_name != NULL) | |
8235 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8236 | break; |
72929c62 | 8237 | case DW_TAG_constant: |
31edb802 | 8238 | add_psymbol_to_list (actual_name, |
75aedd27 TT |
8239 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
8240 | -1, (pdi->is_external | |
8241 | ? psymbol_placement::GLOBAL | |
8242 | : psymbol_placement::STATIC), | |
8243 | 0, cu->language, objfile); | |
72929c62 | 8244 | break; |
c906108c | 8245 | case DW_TAG_variable: |
95554aad TT |
8246 | if (pdi->d.locdesc) |
8247 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8248 | |
95554aad | 8249 | if (pdi->d.locdesc |
caac4577 JG |
8250 | && addr == 0 |
8251 | && !dwarf2_per_objfile->has_section_at_zero) | |
8252 | { | |
8253 | /* A global or static variable may also have been stripped | |
8254 | out by the linker if unused, in which case its address | |
8255 | will be nullified; do not add such variables into partial | |
8256 | symbol table then. */ | |
8257 | } | |
8258 | else if (pdi->is_external) | |
c906108c SS |
8259 | { |
8260 | /* Global Variable. | |
8261 | Don't enter into the minimal symbol tables as there is | |
8262 | a minimal symbol table entry from the ELF symbols already. | |
8263 | Enter into partial symbol table if it has a location | |
8264 | descriptor or a type. | |
8265 | If the location descriptor is missing, new_symbol will create | |
8266 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8267 | be determined from the minimal symbol table whenever the variable | |
8268 | is referenced. | |
8269 | The address for the partial symbol table entry is not | |
8270 | used by GDB, but it comes in handy for debugging partial symbol | |
8271 | table building. */ | |
8272 | ||
95554aad | 8273 | if (pdi->d.locdesc || pdi->has_type) |
31edb802 | 8274 | add_psymbol_to_list (actual_name, |
15d034d0 | 8275 | built_actual_name != NULL, |
f47fb265 | 8276 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8277 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8278 | psymbol_placement::GLOBAL, |
79748972 | 8279 | addr, cu->language, objfile); |
c906108c SS |
8280 | } |
8281 | else | |
8282 | { | |
ff908ebf AW |
8283 | int has_loc = pdi->d.locdesc != NULL; |
8284 | ||
8285 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8286 | without location descriptors or constant values). */ | |
8287 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 8288 | return; |
ff908ebf | 8289 | |
31edb802 | 8290 | add_psymbol_to_list (actual_name, |
15d034d0 | 8291 | built_actual_name != NULL, |
f47fb265 | 8292 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8293 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8294 | psymbol_placement::STATIC, |
79748972 | 8295 | has_loc ? addr : 0, |
f47fb265 | 8296 | cu->language, objfile); |
c906108c SS |
8297 | } |
8298 | break; | |
8299 | case DW_TAG_typedef: | |
8300 | case DW_TAG_base_type: | |
a02abb62 | 8301 | case DW_TAG_subrange_type: |
31edb802 | 8302 | add_psymbol_to_list (actual_name, |
15d034d0 | 8303 | built_actual_name != NULL, |
79748972 | 8304 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8305 | psymbol_placement::STATIC, |
1762568f | 8306 | 0, cu->language, objfile); |
c906108c | 8307 | break; |
74921315 | 8308 | case DW_TAG_imported_declaration: |
72bf9492 | 8309 | case DW_TAG_namespace: |
31edb802 | 8310 | add_psymbol_to_list (actual_name, |
15d034d0 | 8311 | built_actual_name != NULL, |
79748972 | 8312 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8313 | psymbol_placement::GLOBAL, |
1762568f | 8314 | 0, cu->language, objfile); |
72bf9492 | 8315 | break; |
530e8392 | 8316 | case DW_TAG_module: |
a5fd13a9 BH |
8317 | /* With Fortran 77 there might be a "BLOCK DATA" module |
8318 | available without any name. If so, we skip the module as it | |
8319 | doesn't bring any value. */ | |
8320 | if (actual_name != nullptr) | |
31edb802 | 8321 | add_psymbol_to_list (actual_name, |
a5fd13a9 BH |
8322 | built_actual_name != NULL, |
8323 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
8324 | psymbol_placement::GLOBAL, | |
8325 | 0, cu->language, objfile); | |
530e8392 | 8326 | break; |
c906108c | 8327 | case DW_TAG_class_type: |
680b30c7 | 8328 | case DW_TAG_interface_type: |
c906108c SS |
8329 | case DW_TAG_structure_type: |
8330 | case DW_TAG_union_type: | |
8331 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8332 | /* Skip external references. The DWARF standard says in the section |
8333 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8334 | structure, union or class type is represented by a structure, | |
8335 | union or class entry that does not have a byte size attribute | |
8336 | and that has a DW_AT_declaration attribute." */ | |
8337 | if (!pdi->has_byte_size && pdi->is_declaration) | |
43816ebc | 8338 | return; |
fa4028e9 | 8339 | |
63d06c5c DC |
8340 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8341 | static vs. global. */ | |
31edb802 | 8342 | add_psymbol_to_list (actual_name, |
15d034d0 | 8343 | built_actual_name != NULL, |
79748972 | 8344 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 8345 | cu->language == language_cplus |
75aedd27 TT |
8346 | ? psymbol_placement::GLOBAL |
8347 | : psymbol_placement::STATIC, | |
1762568f | 8348 | 0, cu->language, objfile); |
c906108c | 8349 | |
c906108c SS |
8350 | break; |
8351 | case DW_TAG_enumerator: | |
31edb802 | 8352 | add_psymbol_to_list (actual_name, |
15d034d0 | 8353 | built_actual_name != NULL, |
79748972 | 8354 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 8355 | cu->language == language_cplus |
75aedd27 TT |
8356 | ? psymbol_placement::GLOBAL |
8357 | : psymbol_placement::STATIC, | |
1762568f | 8358 | 0, cu->language, objfile); |
c906108c SS |
8359 | break; |
8360 | default: | |
8361 | break; | |
8362 | } | |
8363 | } | |
8364 | ||
5c4e30ca DC |
8365 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8366 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8367 | the name of the enclosing namespace. */ | |
91c24f0a | 8368 | |
72bf9492 DJ |
8369 | static void |
8370 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8371 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8372 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8373 | { |
72bf9492 | 8374 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8375 | |
72bf9492 | 8376 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8377 | |
8378 | /* Now scan partial symbols in that namespace. */ | |
8379 | ||
91c24f0a | 8380 | if (pdi->has_children) |
cdc07690 | 8381 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8382 | } |
8383 | ||
5d7cb8df JK |
8384 | /* Read a partial die corresponding to a Fortran module. */ |
8385 | ||
8386 | static void | |
8387 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8388 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8389 | { |
530e8392 KB |
8390 | /* Add a symbol for the namespace. */ |
8391 | ||
8392 | add_partial_symbol (pdi, cu); | |
8393 | ||
f55ee35c | 8394 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8395 | |
8396 | if (pdi->has_children) | |
cdc07690 | 8397 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8398 | } |
8399 | ||
b1dc1806 XR |
8400 | /* Read a partial die corresponding to a subprogram or an inlined |
8401 | subprogram and create a partial symbol for that subprogram. | |
8402 | When the CU language allows it, this routine also defines a partial | |
8403 | symbol for each nested subprogram that this subprogram contains. | |
8404 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8405 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8406 | |
cdc07690 YQ |
8407 | PDI may also be a lexical block, in which case we simply search |
8408 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8409 | Again, this is only performed when the CU language allows this |
8410 | type of definitions. */ | |
8411 | ||
8412 | static void | |
8413 | add_partial_subprogram (struct partial_die_info *pdi, | |
8414 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8415 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8416 | { |
b1dc1806 | 8417 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8418 | { |
8419 | if (pdi->has_pc_info) | |
8420 | { | |
8421 | if (pdi->lowpc < *lowpc) | |
8422 | *lowpc = pdi->lowpc; | |
8423 | if (pdi->highpc > *highpc) | |
8424 | *highpc = pdi->highpc; | |
cdc07690 | 8425 | if (set_addrmap) |
5734ee8b | 8426 | { |
518817b3 | 8427 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
8428 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8429 | CORE_ADDR baseaddr; | |
b926417a TT |
8430 | CORE_ADDR this_highpc; |
8431 | CORE_ADDR this_lowpc; | |
5734ee8b | 8432 | |
b3b3bada | 8433 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8434 | this_lowpc |
8435 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8436 | pdi->lowpc + baseaddr) | |
8437 | - baseaddr); | |
8438 | this_highpc | |
8439 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8440 | pdi->highpc + baseaddr) | |
8441 | - baseaddr); | |
d320c2b5 | 8442 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 8443 | this_lowpc, this_highpc - 1, |
9291a0cd | 8444 | cu->per_cu->v.psymtab); |
5734ee8b | 8445 | } |
481860b3 GB |
8446 | } |
8447 | ||
8448 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8449 | { | |
bc30ff58 | 8450 | if (!pdi->is_declaration) |
e8d05480 JB |
8451 | /* Ignore subprogram DIEs that do not have a name, they are |
8452 | illegal. Do not emit a complaint at this point, we will | |
8453 | do so when we convert this psymtab into a symtab. */ | |
8454 | if (pdi->name) | |
8455 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8456 | } |
8457 | } | |
6e70227d | 8458 | |
bc30ff58 JB |
8459 | if (! pdi->has_children) |
8460 | return; | |
8461 | ||
0a4b0913 | 8462 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8463 | { |
8464 | pdi = pdi->die_child; | |
8465 | while (pdi != NULL) | |
8466 | { | |
52356b79 | 8467 | pdi->fixup (cu); |
bc30ff58 | 8468 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8469 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8470 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8471 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8472 | pdi = pdi->die_sibling; |
8473 | } | |
8474 | } | |
8475 | } | |
8476 | ||
91c24f0a DC |
8477 | /* Read a partial die corresponding to an enumeration type. */ |
8478 | ||
72bf9492 DJ |
8479 | static void |
8480 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8481 | struct dwarf2_cu *cu) | |
91c24f0a | 8482 | { |
72bf9492 | 8483 | struct partial_die_info *pdi; |
91c24f0a DC |
8484 | |
8485 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8486 | add_partial_symbol (enum_pdi, cu); |
8487 | ||
8488 | pdi = enum_pdi->die_child; | |
8489 | while (pdi) | |
91c24f0a | 8490 | { |
72bf9492 | 8491 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 8492 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8493 | else |
72bf9492 DJ |
8494 | add_partial_symbol (pdi, cu); |
8495 | pdi = pdi->die_sibling; | |
91c24f0a | 8496 | } |
91c24f0a DC |
8497 | } |
8498 | ||
6caca83c CC |
8499 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8500 | ||
8501 | static unsigned int | |
d521ce57 | 8502 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8503 | { |
8504 | unsigned int bytes_read; | |
8505 | ||
8506 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8507 | } | |
8508 | ||
685af9cd TT |
8509 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8510 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8511 | ||
4bb7a0a7 DJ |
8512 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8513 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8514 | the initial number. */ | |
8515 | ||
8516 | static struct abbrev_info * | |
685af9cd TT |
8517 | peek_die_abbrev (const die_reader_specs &reader, |
8518 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8519 | { |
685af9cd | 8520 | dwarf2_cu *cu = reader.cu; |
518817b3 | 8521 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
8522 | unsigned int abbrev_number |
8523 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8524 | |
8525 | if (abbrev_number == 0) | |
8526 | return NULL; | |
8527 | ||
685af9cd | 8528 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
8529 | if (!abbrev) |
8530 | { | |
422b9917 | 8531 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8532 | " at offset %s [in module %s]"), |
422b9917 | 8533 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8534 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8535 | } |
8536 | ||
8537 | return abbrev; | |
8538 | } | |
8539 | ||
93311388 DE |
8540 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8541 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8542 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8543 | ||
d521ce57 TT |
8544 | static const gdb_byte * |
8545 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8546 | { |
4bb7a0a7 DJ |
8547 | while (1) |
8548 | { | |
685af9cd TT |
8549 | unsigned int bytes_read; |
8550 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
8551 | ||
4bb7a0a7 DJ |
8552 | if (abbrev == NULL) |
8553 | return info_ptr + bytes_read; | |
8554 | else | |
dee91e82 | 8555 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8556 | } |
8557 | } | |
8558 | ||
93311388 DE |
8559 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8560 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8561 | abbrev corresponding to that skipped uleb128 should be passed in |
8562 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8563 | children. */ | |
8564 | ||
d521ce57 TT |
8565 | static const gdb_byte * |
8566 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8567 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8568 | { |
8569 | unsigned int bytes_read; | |
8570 | struct attribute attr; | |
dee91e82 DE |
8571 | bfd *abfd = reader->abfd; |
8572 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8573 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8574 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8575 | unsigned int form, i; |
8576 | ||
8577 | for (i = 0; i < abbrev->num_attrs; i++) | |
8578 | { | |
8579 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8580 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8581 | { | |
18a8505e AT |
8582 | bool ignored; |
8583 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr, | |
8584 | &ignored); | |
4bb7a0a7 | 8585 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8586 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8587 | else |
b9502d3f | 8588 | { |
9c541725 PA |
8589 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8590 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8591 | |
8592 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8593 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
8594 | else if (sibling_ptr > reader->buffer_end) |
8595 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8596 | else |
8597 | return sibling_ptr; | |
8598 | } | |
4bb7a0a7 DJ |
8599 | } |
8600 | ||
8601 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8602 | form = abbrev->attrs[i].form; | |
8603 | skip_attribute: | |
8604 | switch (form) | |
8605 | { | |
4bb7a0a7 | 8606 | case DW_FORM_ref_addr: |
ae411497 TT |
8607 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8608 | and later it is offset sized. */ | |
8609 | if (cu->header.version == 2) | |
8610 | info_ptr += cu->header.addr_size; | |
8611 | else | |
8612 | info_ptr += cu->header.offset_size; | |
8613 | break; | |
36586728 TT |
8614 | case DW_FORM_GNU_ref_alt: |
8615 | info_ptr += cu->header.offset_size; | |
8616 | break; | |
ae411497 | 8617 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8618 | info_ptr += cu->header.addr_size; |
8619 | break; | |
8620 | case DW_FORM_data1: | |
8621 | case DW_FORM_ref1: | |
8622 | case DW_FORM_flag: | |
8fe0f950 | 8623 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8624 | info_ptr += 1; |
8625 | break; | |
2dc7f7b3 | 8626 | case DW_FORM_flag_present: |
43988095 | 8627 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8628 | break; |
4bb7a0a7 DJ |
8629 | case DW_FORM_data2: |
8630 | case DW_FORM_ref2: | |
8fe0f950 | 8631 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8632 | info_ptr += 2; |
8633 | break; | |
8fe0f950 AT |
8634 | case DW_FORM_strx3: |
8635 | info_ptr += 3; | |
8636 | break; | |
4bb7a0a7 DJ |
8637 | case DW_FORM_data4: |
8638 | case DW_FORM_ref4: | |
8fe0f950 | 8639 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8640 | info_ptr += 4; |
8641 | break; | |
8642 | case DW_FORM_data8: | |
8643 | case DW_FORM_ref8: | |
55f1336d | 8644 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8645 | info_ptr += 8; |
8646 | break; | |
0224619f JK |
8647 | case DW_FORM_data16: |
8648 | info_ptr += 16; | |
8649 | break; | |
4bb7a0a7 | 8650 | case DW_FORM_string: |
9b1c24c8 | 8651 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8652 | info_ptr += bytes_read; |
8653 | break; | |
2dc7f7b3 | 8654 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8655 | case DW_FORM_strp: |
36586728 | 8656 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8657 | info_ptr += cu->header.offset_size; |
8658 | break; | |
2dc7f7b3 | 8659 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8660 | case DW_FORM_block: |
8661 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8662 | info_ptr += bytes_read; | |
8663 | break; | |
8664 | case DW_FORM_block1: | |
8665 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8666 | break; | |
8667 | case DW_FORM_block2: | |
8668 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8669 | break; | |
8670 | case DW_FORM_block4: | |
8671 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8672 | break; | |
336d760d | 8673 | case DW_FORM_addrx: |
cf532bd1 | 8674 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8675 | case DW_FORM_sdata: |
8676 | case DW_FORM_udata: | |
8677 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8678 | case DW_FORM_GNU_addr_index: |
8679 | case DW_FORM_GNU_str_index: | |
18a8505e | 8680 | case DW_FORM_rnglistx: |
d521ce57 | 8681 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8682 | break; |
8683 | case DW_FORM_indirect: | |
8684 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8685 | info_ptr += bytes_read; | |
8686 | /* We need to continue parsing from here, so just go back to | |
8687 | the top. */ | |
8688 | goto skip_attribute; | |
8689 | ||
8690 | default: | |
3e43a32a MS |
8691 | error (_("Dwarf Error: Cannot handle %s " |
8692 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8693 | dwarf_form_name (form), |
8694 | bfd_get_filename (abfd)); | |
8695 | } | |
8696 | } | |
8697 | ||
8698 | if (abbrev->has_children) | |
dee91e82 | 8699 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8700 | else |
8701 | return info_ptr; | |
8702 | } | |
8703 | ||
93311388 | 8704 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8705 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8706 | |
d521ce57 | 8707 | static const gdb_byte * |
dee91e82 DE |
8708 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8709 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8710 | const gdb_byte *info_ptr) |
91c24f0a DC |
8711 | { |
8712 | /* Do we know the sibling already? */ | |
72bf9492 | 8713 | |
91c24f0a DC |
8714 | if (orig_pdi->sibling) |
8715 | return orig_pdi->sibling; | |
8716 | ||
8717 | /* Are there any children to deal with? */ | |
8718 | ||
8719 | if (!orig_pdi->has_children) | |
8720 | return info_ptr; | |
8721 | ||
4bb7a0a7 | 8722 | /* Skip the children the long way. */ |
91c24f0a | 8723 | |
dee91e82 | 8724 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8725 | } |
8726 | ||
257e7a09 | 8727 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8728 | not NULL. */ |
c906108c | 8729 | |
891813be TT |
8730 | void |
8731 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8732 | { |
ed2dc618 SM |
8733 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8734 | = get_dwarf2_per_objfile (objfile); | |
8735 | ||
077cbab2 TT |
8736 | gdb_assert (!readin); |
8737 | /* If this psymtab is constructed from a debug-only objfile, the | |
8738 | has_section_at_zero flag will not necessarily be correct. We | |
8739 | can get the correct value for this flag by looking at the data | |
8740 | associated with the (presumably stripped) associated objfile. */ | |
8741 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8742 | { |
077cbab2 TT |
8743 | struct dwarf2_per_objfile *dpo_backlink |
8744 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); | |
c906108c | 8745 | |
077cbab2 TT |
8746 | dwarf2_per_objfile->has_section_at_zero |
8747 | = dpo_backlink->has_section_at_zero; | |
8748 | } | |
98bfdba5 | 8749 | |
8566b89b | 8750 | expand_psymtab (objfile); |
95554aad | 8751 | |
ed2dc618 | 8752 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 8753 | } |
9cdd5dbd DE |
8754 | \f |
8755 | /* Reading in full CUs. */ | |
c906108c | 8756 | |
10b3939b DJ |
8757 | /* Add PER_CU to the queue. */ |
8758 | ||
8759 | static void | |
95554aad TT |
8760 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8761 | enum language pretend_language) | |
10b3939b | 8762 | { |
10b3939b | 8763 | per_cu->queued = 1; |
39856def | 8764 | per_cu->dwarf2_per_objfile->queue.emplace (per_cu, pretend_language); |
10b3939b DJ |
8765 | } |
8766 | ||
89e63ee4 DE |
8767 | /* If PER_CU is not yet queued, add it to the queue. |
8768 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8769 | dependency. | |
0907af0c | 8770 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8771 | meaning either PER_CU is already queued or it is already loaded. |
8772 | ||
8773 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8774 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8775 | |
8776 | static int | |
89e63ee4 | 8777 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8778 | struct dwarf2_per_cu_data *per_cu, |
8779 | enum language pretend_language) | |
8780 | { | |
8781 | /* We may arrive here during partial symbol reading, if we need full | |
8782 | DIEs to process an unusual case (e.g. template arguments). Do | |
8783 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 8784 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
8785 | { |
8786 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8787 | return 1; | |
8788 | return 0; | |
8789 | } | |
8790 | ||
8791 | /* Mark the dependence relation so that we don't flush PER_CU | |
8792 | too early. */ | |
89e63ee4 DE |
8793 | if (dependent_cu != NULL) |
8794 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8795 | |
8796 | /* If it's already on the queue, we have nothing to do. */ | |
8797 | if (per_cu->queued) | |
8798 | return 0; | |
8799 | ||
8800 | /* If the compilation unit is already loaded, just mark it as | |
8801 | used. */ | |
8802 | if (per_cu->cu != NULL) | |
8803 | { | |
8804 | per_cu->cu->last_used = 0; | |
8805 | return 0; | |
8806 | } | |
8807 | ||
8808 | /* Add it to the queue. */ | |
8809 | queue_comp_unit (per_cu, pretend_language); | |
8810 | ||
8811 | return 1; | |
8812 | } | |
8813 | ||
10b3939b DJ |
8814 | /* Process the queue. */ |
8815 | ||
8816 | static void | |
ed2dc618 | 8817 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b | 8818 | { |
b4f54984 | 8819 | if (dwarf_read_debug) |
45cfd468 DE |
8820 | { |
8821 | fprintf_unfiltered (gdb_stdlog, | |
8822 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8823 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8824 | } |
8825 | ||
03dd20cc DJ |
8826 | /* The queue starts out with one item, but following a DIE reference |
8827 | may load a new CU, adding it to the end of the queue. */ | |
39856def | 8828 | while (!dwarf2_per_objfile->queue.empty ()) |
10b3939b | 8829 | { |
39856def TT |
8830 | dwarf2_queue_item &item = dwarf2_per_objfile->queue.front (); |
8831 | ||
cc12ce38 | 8832 | if ((dwarf2_per_objfile->using_index |
39856def TT |
8833 | ? !item.per_cu->v.quick->compunit_symtab |
8834 | : (item.per_cu->v.psymtab && !item.per_cu->v.psymtab->readin)) | |
cc12ce38 | 8835 | /* Skip dummy CUs. */ |
39856def | 8836 | && item.per_cu->cu != NULL) |
f4dc4d17 | 8837 | { |
39856def | 8838 | struct dwarf2_per_cu_data *per_cu = item.per_cu; |
73be47f5 | 8839 | unsigned int debug_print_threshold; |
247f5c4f | 8840 | char buf[100]; |
f4dc4d17 | 8841 | |
247f5c4f | 8842 | if (per_cu->is_debug_types) |
f4dc4d17 | 8843 | { |
247f5c4f DE |
8844 | struct signatured_type *sig_type = |
8845 | (struct signatured_type *) per_cu; | |
8846 | ||
9d8780f0 | 8847 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 8848 | hex_string (sig_type->signature), |
9d8780f0 | 8849 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
8850 | /* There can be 100s of TUs. |
8851 | Only print them in verbose mode. */ | |
8852 | debug_print_threshold = 2; | |
f4dc4d17 | 8853 | } |
247f5c4f | 8854 | else |
73be47f5 | 8855 | { |
9d8780f0 SM |
8856 | sprintf (buf, "CU at offset %s", |
8857 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
8858 | debug_print_threshold = 1; |
8859 | } | |
247f5c4f | 8860 | |
b4f54984 | 8861 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8862 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8863 | |
8864 | if (per_cu->is_debug_types) | |
39856def | 8865 | process_full_type_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8866 | else |
39856def | 8867 | process_full_comp_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8868 | |
b4f54984 | 8869 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8870 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8871 | } |
10b3939b | 8872 | |
39856def TT |
8873 | item.per_cu->queued = 0; |
8874 | dwarf2_per_objfile->queue.pop (); | |
10b3939b DJ |
8875 | } |
8876 | ||
b4f54984 | 8877 | if (dwarf_read_debug) |
45cfd468 DE |
8878 | { |
8879 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8880 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8881 | } |
10b3939b DJ |
8882 | } |
8883 | ||
10b3939b DJ |
8884 | /* Read in full symbols for PST, and anything it depends on. */ |
8885 | ||
8566b89b TT |
8886 | void |
8887 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8888 | { |
8566b89b | 8889 | if (readin) |
95554aad TT |
8890 | return; |
8891 | ||
0494dbec | 8892 | read_dependencies (objfile); |
aaa75496 | 8893 | |
b83470bf TT |
8894 | dw2_do_instantiate_symtab (per_cu_data, false); |
8895 | gdb_assert (get_compunit_symtab () != nullptr); | |
10b3939b DJ |
8896 | } |
8897 | ||
dee91e82 DE |
8898 | /* Trivial hash function for die_info: the hash value of a DIE |
8899 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8900 | |
dee91e82 DE |
8901 | static hashval_t |
8902 | die_hash (const void *item) | |
10b3939b | 8903 | { |
9a3c8263 | 8904 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8905 | |
9c541725 | 8906 | return to_underlying (die->sect_off); |
dee91e82 | 8907 | } |
63d06c5c | 8908 | |
dee91e82 DE |
8909 | /* Trivial comparison function for die_info structures: two DIEs |
8910 | are equal if they have the same offset. */ | |
98bfdba5 | 8911 | |
dee91e82 DE |
8912 | static int |
8913 | die_eq (const void *item_lhs, const void *item_rhs) | |
8914 | { | |
9a3c8263 SM |
8915 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8916 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8917 | |
9c541725 | 8918 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8919 | } |
c906108c | 8920 | |
c0ab21c2 | 8921 | /* Load the DIEs associated with PER_CU into memory. */ |
c906108c | 8922 | |
dee91e82 | 8923 | static void |
c0ab21c2 TT |
8924 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8925 | bool skip_partial, | |
8926 | enum language pretend_language) | |
dee91e82 | 8927 | { |
c0ab21c2 TT |
8928 | gdb_assert (! this_cu->is_debug_types); |
8929 | ||
6751ebae | 8930 | cutu_reader reader (this_cu, NULL, 1, skip_partial); |
c0ab21c2 TT |
8931 | if (reader.dummy_p) |
8932 | return; | |
8933 | ||
8934 | struct dwarf2_cu *cu = reader.cu; | |
8935 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 8936 | |
dee91e82 DE |
8937 | gdb_assert (cu->die_hash == NULL); |
8938 | cu->die_hash = | |
8939 | htab_create_alloc_ex (cu->header.length / 12, | |
8940 | die_hash, | |
8941 | die_eq, | |
8942 | NULL, | |
8943 | &cu->comp_unit_obstack, | |
8944 | hashtab_obstack_allocate, | |
8945 | dummy_obstack_deallocate); | |
e142c38c | 8946 | |
3e225074 | 8947 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
8948 | reader.comp_unit_die->child |
8949 | = read_die_and_siblings (&reader, reader.info_ptr, | |
8950 | &info_ptr, reader.comp_unit_die); | |
8951 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 8952 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
8953 | |
8954 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8955 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8956 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8957 | or we won't be able to build types correctly. |
8958 | Similarly, if we do not read the producer, we can not apply | |
8959 | producer-specific interpretation. */ | |
c0ab21c2 | 8960 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
8961 | |
8962 | reader.keep (); | |
10b3939b DJ |
8963 | } |
8964 | ||
3da10d80 KS |
8965 | /* Add a DIE to the delayed physname list. */ |
8966 | ||
8967 | static void | |
8968 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8969 | const char *name, struct die_info *die, | |
8970 | struct dwarf2_cu *cu) | |
8971 | { | |
8972 | struct delayed_method_info mi; | |
8973 | mi.type = type; | |
8974 | mi.fnfield_index = fnfield_index; | |
8975 | mi.index = index; | |
8976 | mi.name = name; | |
8977 | mi.die = die; | |
c89b44cd | 8978 | cu->method_list.push_back (mi); |
3da10d80 KS |
8979 | } |
8980 | ||
3693fdb3 PA |
8981 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8982 | "const" / "volatile". If so, decrements LEN by the length of the | |
8983 | modifier and return true. Otherwise return false. */ | |
8984 | ||
8985 | template<size_t N> | |
8986 | static bool | |
8987 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8988 | { | |
8989 | size_t mod_len = sizeof (mod) - 1; | |
8990 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8991 | { | |
8992 | len -= mod_len; | |
8993 | return true; | |
8994 | } | |
8995 | return false; | |
8996 | } | |
8997 | ||
3da10d80 KS |
8998 | /* Compute the physnames of any methods on the CU's method list. |
8999 | ||
9000 | The computation of method physnames is delayed in order to avoid the | |
9001 | (bad) condition that one of the method's formal parameters is of an as yet | |
9002 | incomplete type. */ | |
9003 | ||
9004 | static void | |
9005 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9006 | { | |
3693fdb3 | 9007 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9008 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9009 | return; |
9010 | gdb_assert (cu->language == language_cplus); | |
9011 | ||
52941706 | 9012 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9013 | { |
1d06ead6 | 9014 | const char *physname; |
3da10d80 | 9015 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9016 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9017 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9018 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9019 | = physname ? physname : ""; |
3693fdb3 PA |
9020 | |
9021 | /* Since there's no tag to indicate whether a method is a | |
9022 | const/volatile overload, extract that information out of the | |
9023 | demangled name. */ | |
9024 | if (physname != NULL) | |
9025 | { | |
9026 | size_t len = strlen (physname); | |
9027 | ||
9028 | while (1) | |
9029 | { | |
9030 | if (physname[len] == ')') /* shortcut */ | |
9031 | break; | |
9032 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9033 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9034 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9035 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9036 | else |
9037 | break; | |
9038 | } | |
9039 | } | |
3da10d80 | 9040 | } |
c89b44cd TT |
9041 | |
9042 | /* The list is no longer needed. */ | |
9043 | cu->method_list.clear (); | |
3da10d80 KS |
9044 | } |
9045 | ||
a766d390 DE |
9046 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9047 | and it's not clear if/how imported objects will appear. | |
9048 | To keep Go support simple until that's worked out, | |
9049 | go back through what we've read and create something usable. | |
9050 | We could do this while processing each DIE, and feels kinda cleaner, | |
9051 | but that way is more invasive. | |
9052 | This is to, for example, allow the user to type "p var" or "b main" | |
9053 | without having to specify the package name, and allow lookups | |
9054 | of module.object to work in contexts that use the expression | |
9055 | parser. */ | |
9056 | ||
9057 | static void | |
9058 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9059 | { | |
421d1616 | 9060 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
9061 | struct pending *list; |
9062 | int i; | |
9063 | ||
c24bdb02 | 9064 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9065 | list != NULL; |
9066 | list = list->next) | |
a766d390 DE |
9067 | { |
9068 | for (i = 0; i < list->nsyms; ++i) | |
9069 | { | |
9070 | struct symbol *sym = list->symbol[i]; | |
9071 | ||
c1b5c1eb | 9072 | if (sym->language () == language_go |
a766d390 DE |
9073 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
9074 | { | |
421d1616 TT |
9075 | gdb::unique_xmalloc_ptr<char> this_package_name |
9076 | (go_symbol_package_name (sym)); | |
a766d390 DE |
9077 | |
9078 | if (this_package_name == NULL) | |
9079 | continue; | |
9080 | if (package_name == NULL) | |
421d1616 | 9081 | package_name = std::move (this_package_name); |
a766d390 DE |
9082 | else |
9083 | { | |
518817b3 SM |
9084 | struct objfile *objfile |
9085 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
421d1616 | 9086 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 9087 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9088 | (symbol_symtab (sym) != NULL |
9089 | ? symtab_to_filename_for_display | |
9090 | (symbol_symtab (sym)) | |
e3b94546 | 9091 | : objfile_name (objfile)), |
421d1616 | 9092 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
9093 | } |
9094 | } | |
9095 | } | |
9096 | } | |
9097 | ||
9098 | if (package_name != NULL) | |
9099 | { | |
518817b3 | 9100 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 9101 | const char *saved_package_name = objfile->intern (package_name.get ()); |
19f392bc UW |
9102 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9103 | saved_package_name); | |
a766d390 DE |
9104 | struct symbol *sym; |
9105 | ||
e623cf5d | 9106 | sym = allocate_symbol (objfile); |
d3ecddab | 9107 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 9108 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
9109 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9110 | e.g., "main" finds the "main" module and not C's main(). */ | |
9111 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9112 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9113 | SYMBOL_TYPE (sym) = type; |
9114 | ||
c24bdb02 | 9115 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9116 | } |
9117 | } | |
9118 | ||
c9317f21 TT |
9119 | /* Allocate a fully-qualified name consisting of the two parts on the |
9120 | obstack. */ | |
9121 | ||
9122 | static const char * | |
9123 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9124 | { | |
9125 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9126 | } | |
9127 | ||
9128 | /* A helper that allocates a struct discriminant_info to attach to a | |
9129 | union type. */ | |
9130 | ||
9131 | static struct discriminant_info * | |
9132 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9133 | int default_index) | |
9134 | { | |
9135 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9136 | gdb_assert (discriminant_index == -1 |
9137 | || (discriminant_index >= 0 | |
9138 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9139 | gdb_assert (default_index == -1 |
c7b15a66 | 9140 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9141 | |
9142 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9143 | ||
9144 | struct discriminant_info *disc | |
9145 | = ((struct discriminant_info *) | |
9146 | TYPE_ZALLOC (type, | |
9147 | offsetof (struct discriminant_info, discriminants) | |
9148 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9149 | disc->default_index = default_index; | |
9150 | disc->discriminant_index = discriminant_index; | |
9151 | ||
9152 | struct dynamic_prop prop; | |
9153 | prop.kind = PROP_UNDEFINED; | |
9154 | prop.data.baton = disc; | |
9155 | ||
9156 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9157 | ||
9158 | return disc; | |
9159 | } | |
9160 | ||
9161 | /* Some versions of rustc emitted enums in an unusual way. | |
9162 | ||
9163 | Ordinary enums were emitted as unions. The first element of each | |
9164 | structure in the union was named "RUST$ENUM$DISR". This element | |
9165 | held the discriminant. | |
9166 | ||
9167 | These versions of Rust also implemented the "non-zero" | |
9168 | optimization. When the enum had two values, and one is empty and | |
9169 | the other holds a pointer that cannot be zero, the pointer is used | |
9170 | as the discriminant, with a zero value meaning the empty variant. | |
9171 | Here, the union's first member is of the form | |
9172 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9173 | where the fieldnos are the indices of the fields that should be | |
9174 | traversed in order to find the field (which may be several fields deep) | |
9175 | and the variantname is the name of the variant of the case when the | |
9176 | field is zero. | |
9177 | ||
9178 | This function recognizes whether TYPE is of one of these forms, | |
9179 | and, if so, smashes it to be a variant type. */ | |
9180 | ||
9181 | static void | |
9182 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9183 | { | |
9184 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9185 | ||
9186 | /* We don't need to deal with empty enums. */ | |
9187 | if (TYPE_NFIELDS (type) == 0) | |
9188 | return; | |
9189 | ||
9190 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9191 | if (TYPE_NFIELDS (type) == 1 | |
9192 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9193 | { | |
9194 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9195 | ||
9196 | /* Decode the field name to find the offset of the | |
9197 | discriminant. */ | |
9198 | ULONGEST bit_offset = 0; | |
9199 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9200 | while (name[0] >= '0' && name[0] <= '9') | |
9201 | { | |
9202 | char *tail; | |
9203 | unsigned long index = strtoul (name, &tail, 10); | |
9204 | name = tail; | |
9205 | if (*name != '$' | |
9206 | || index >= TYPE_NFIELDS (field_type) | |
9207 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9208 | != FIELD_LOC_KIND_BITPOS)) | |
9209 | { | |
b98664d3 | 9210 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9211 | "[in module %s]"), |
9212 | TYPE_FIELD_NAME (type, 0), | |
9213 | objfile_name (objfile)); | |
9214 | return; | |
9215 | } | |
9216 | ++name; | |
9217 | ||
9218 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9219 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9220 | } | |
9221 | ||
9222 | /* Make a union to hold the variants. */ | |
9223 | struct type *union_type = alloc_type (objfile); | |
9224 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9225 | TYPE_NFIELDS (union_type) = 3; | |
9226 | TYPE_FIELDS (union_type) | |
9227 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
9228 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9229 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9230 | |
9231 | /* Put the discriminant must at index 0. */ | |
9232 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
9233 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9234 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9235 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
9236 | ||
9237 | /* The order of fields doesn't really matter, so put the real | |
9238 | field at index 1 and the data-less field at index 2. */ | |
9239 | struct discriminant_info *disc | |
9240 | = alloc_discriminant_info (union_type, 0, 1); | |
9241 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
9242 | TYPE_FIELD_NAME (union_type, 1) | |
9243 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
9244 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
9245 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9246 | TYPE_FIELD_NAME (union_type, 1)); | |
9247 | ||
9248 | const char *dataless_name | |
9249 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9250 | name); | |
9251 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9252 | dataless_name); | |
9253 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
9254 | /* NAME points into the original discriminant name, which | |
9255 | already has the correct lifetime. */ | |
9256 | TYPE_FIELD_NAME (union_type, 2) = name; | |
9257 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
9258 | disc->discriminants[2] = 0; | |
9259 | ||
9260 | /* Smash this type to be a structure type. We have to do this | |
9261 | because the type has already been recorded. */ | |
9262 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9263 | TYPE_NFIELDS (type) = 1; | |
9264 | TYPE_FIELDS (type) | |
9265 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
9266 | ||
9267 | /* Install the variant part. */ | |
9268 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9269 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9270 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9271 | } | |
77c2dba3 TT |
9272 | /* A union with a single anonymous field is probably an old-style |
9273 | univariant enum. */ | |
9274 | else if (TYPE_NFIELDS (type) == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) | |
c9317f21 | 9275 | { |
c9317f21 TT |
9276 | /* Smash this type to be a structure type. We have to do this |
9277 | because the type has already been recorded. */ | |
9278 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9279 | ||
9280 | /* Make a union to hold the variants. */ | |
9281 | struct type *union_type = alloc_type (objfile); | |
9282 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9283 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
9284 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9285 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9286 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
9287 | ||
9288 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
9289 | const char *variant_name | |
9290 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
9291 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
9292 | TYPE_NAME (field_type) | |
9293 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 9294 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
9295 | |
9296 | /* Install the union in the outer struct type. */ | |
9297 | TYPE_NFIELDS (type) = 1; | |
9298 | TYPE_FIELDS (type) | |
9299 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
9300 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9301 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9302 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9303 | ||
9304 | alloc_discriminant_info (union_type, -1, 0); | |
9305 | } | |
9306 | else | |
9307 | { | |
9308 | struct type *disr_type = nullptr; | |
9309 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9310 | { | |
9311 | disr_type = TYPE_FIELD_TYPE (type, i); | |
9312 | ||
a037790e TT |
9313 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
9314 | { | |
9315 | /* All fields of a true enum will be structs. */ | |
9316 | return; | |
9317 | } | |
9318 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
9319 | { |
9320 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9321 | disr_type = nullptr; |
c9317f21 TT |
9322 | } |
9323 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9324 | "RUST$ENUM$DISR") != 0) | |
9325 | { | |
9326 | /* Not a Rust enum. */ | |
9327 | return; | |
9328 | } | |
9329 | else | |
9330 | { | |
9331 | /* Found one. */ | |
9332 | break; | |
9333 | } | |
9334 | } | |
9335 | ||
9336 | /* If we got here without a discriminant, then it's probably | |
9337 | just a union. */ | |
9338 | if (disr_type == nullptr) | |
9339 | return; | |
9340 | ||
9341 | /* Smash this type to be a structure type. We have to do this | |
9342 | because the type has already been recorded. */ | |
9343 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9344 | ||
9345 | /* Make a union to hold the variants. */ | |
9346 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
9347 | struct type *union_type = alloc_type (objfile); | |
9348 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9349 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
9350 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9351 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9352 | TYPE_FIELDS (union_type) |
9353 | = (struct field *) TYPE_ZALLOC (union_type, | |
9354 | (TYPE_NFIELDS (union_type) | |
9355 | * sizeof (struct field))); | |
9356 | ||
9357 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
9358 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
9359 | ||
9360 | /* Install the discriminant at index 0 in the union. */ | |
9361 | TYPE_FIELD (union_type, 0) = *disr_field; | |
9362 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9363 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9364 | ||
9365 | /* Install the union in the outer struct type. */ | |
9366 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9367 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9368 | TYPE_NFIELDS (type) = 1; | |
9369 | ||
9370 | /* Set the size and offset of the union type. */ | |
9371 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9372 | ||
9373 | /* We need a way to find the correct discriminant given a | |
9374 | variant name. For convenience we build a map here. */ | |
9375 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
9376 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
9377 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
9378 | { | |
9379 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9380 | { | |
9381 | const char *name | |
9382 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9383 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9384 | } | |
9385 | } | |
9386 | ||
9387 | int n_fields = TYPE_NFIELDS (union_type); | |
9388 | struct discriminant_info *disc | |
9389 | = alloc_discriminant_info (union_type, 0, -1); | |
9390 | /* Skip the discriminant here. */ | |
9391 | for (int i = 1; i < n_fields; ++i) | |
9392 | { | |
9393 | /* Find the final word in the name of this variant's type. | |
9394 | That name can be used to look up the correct | |
9395 | discriminant. */ | |
9396 | const char *variant_name | |
9397 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
9398 | i))); | |
9399 | ||
9400 | auto iter = discriminant_map.find (variant_name); | |
9401 | if (iter != discriminant_map.end ()) | |
9402 | disc->discriminants[i] = iter->second; | |
9403 | ||
bedda9ac | 9404 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 9405 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
9406 | if (TYPE_NFIELDS (sub_type) > 0) |
9407 | { | |
9408 | --TYPE_NFIELDS (sub_type); | |
9409 | ++TYPE_FIELDS (sub_type); | |
9410 | } | |
c9317f21 TT |
9411 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
9412 | TYPE_NAME (sub_type) | |
9413 | = rust_fully_qualify (&objfile->objfile_obstack, | |
9414 | TYPE_NAME (type), variant_name); | |
9415 | } | |
9416 | } | |
9417 | } | |
9418 | ||
9419 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9420 | ||
9421 | static void | |
9422 | rust_union_quirks (struct dwarf2_cu *cu) | |
9423 | { | |
9424 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
9425 | for (type *type_ : cu->rust_unions) |
9426 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
9427 | /* We don't need this any more. */ |
9428 | cu->rust_unions.clear (); | |
c9317f21 TT |
9429 | } |
9430 | ||
95554aad TT |
9431 | /* Return the symtab for PER_CU. This works properly regardless of |
9432 | whether we're using the index or psymtabs. */ | |
9433 | ||
43f3e411 DE |
9434 | static struct compunit_symtab * |
9435 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 9436 | { |
ed2dc618 | 9437 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
9438 | ? per_cu->v.quick->compunit_symtab |
9439 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9440 | } |
9441 | ||
9442 | /* A helper function for computing the list of all symbol tables | |
9443 | included by PER_CU. */ | |
9444 | ||
9445 | static void | |
4c39bc03 | 9446 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9447 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9448 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9449 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9450 | { |
9451 | void **slot; | |
43f3e411 | 9452 | struct compunit_symtab *cust; |
95554aad TT |
9453 | |
9454 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9455 | if (*slot != NULL) | |
9456 | { | |
9457 | /* This inclusion and its children have been processed. */ | |
9458 | return; | |
9459 | } | |
9460 | ||
9461 | *slot = per_cu; | |
9462 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9463 | cust = get_compunit_symtab (per_cu); |
9464 | if (cust != NULL) | |
ec94af83 DE |
9465 | { |
9466 | /* If this is a type unit only add its symbol table if we haven't | |
9467 | seen it yet (type unit per_cu's can share symtabs). */ | |
9468 | if (per_cu->is_debug_types) | |
9469 | { | |
43f3e411 | 9470 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9471 | if (*slot == NULL) |
9472 | { | |
43f3e411 | 9473 | *slot = cust; |
4c39bc03 | 9474 | result->push_back (cust); |
43f3e411 DE |
9475 | if (cust->user == NULL) |
9476 | cust->user = immediate_parent; | |
ec94af83 DE |
9477 | } |
9478 | } | |
9479 | else | |
f9125b6c | 9480 | { |
4c39bc03 | 9481 | result->push_back (cust); |
43f3e411 DE |
9482 | if (cust->user == NULL) |
9483 | cust->user = immediate_parent; | |
f9125b6c | 9484 | } |
ec94af83 | 9485 | } |
95554aad | 9486 | |
ae640021 AB |
9487 | if (!per_cu->imported_symtabs_empty ()) |
9488 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9489 | { | |
9490 | recursively_compute_inclusions (result, all_children, | |
9491 | all_type_symtabs, ptr, cust); | |
9492 | } | |
95554aad TT |
9493 | } |
9494 | ||
43f3e411 | 9495 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9496 | PER_CU. */ |
9497 | ||
9498 | static void | |
43f3e411 | 9499 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9500 | { |
f4dc4d17 DE |
9501 | gdb_assert (! per_cu->is_debug_types); |
9502 | ||
ae640021 | 9503 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9504 | { |
ae640021 | 9505 | int len; |
4c39bc03 | 9506 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 9507 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9508 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9509 | |
9510 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9511 | if (cust == NULL) |
95554aad TT |
9512 | return; |
9513 | ||
9514 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9515 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9516 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9517 | NULL, xcalloc, xfree); | |
95554aad | 9518 | |
ae640021 | 9519 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 DE |
9520 | { |
9521 | recursively_compute_inclusions (&result_symtabs, all_children, | |
ae640021 | 9522 | all_type_symtabs, ptr, cust); |
ec94af83 | 9523 | } |
95554aad | 9524 | |
ec94af83 | 9525 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9526 | len = result_symtabs.size (); |
43f3e411 | 9527 | cust->includes |
ed2dc618 | 9528 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 9529 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9530 | memcpy (cust->includes, result_symtabs.data (), |
9531 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9532 | cust->includes[len] = NULL; |
95554aad | 9533 | |
95554aad | 9534 | htab_delete (all_children); |
ec94af83 | 9535 | htab_delete (all_type_symtabs); |
95554aad TT |
9536 | } |
9537 | } | |
9538 | ||
9539 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9540 | read. */ | |
9541 | ||
9542 | static void | |
ed2dc618 | 9543 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 9544 | { |
71b73764 | 9545 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
9546 | { |
9547 | if (! iter->is_debug_types) | |
43f3e411 | 9548 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9549 | } |
95554aad | 9550 | |
c5d0225d | 9551 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
9552 | } |
9553 | ||
9cdd5dbd | 9554 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9555 | already been loaded into memory. */ |
9556 | ||
9557 | static void | |
95554aad TT |
9558 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9559 | enum language pretend_language) | |
10b3939b | 9560 | { |
10b3939b | 9561 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
9562 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9563 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 9564 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9565 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9566 | struct compunit_symtab *cust; |
10b3939b | 9567 | CORE_ADDR baseaddr; |
4359dff1 | 9568 | struct block *static_block; |
3e29f34a | 9569 | CORE_ADDR addr; |
10b3939b | 9570 | |
b3b3bada | 9571 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9572 | |
c89b44cd TT |
9573 | /* Clear the list here in case something was left over. */ |
9574 | cu->method_list.clear (); | |
10b3939b | 9575 | |
95554aad TT |
9576 | cu->language = pretend_language; |
9577 | cu->language_defn = language_def (cu->language); | |
9578 | ||
c906108c | 9579 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9580 | process_die (cu->dies, cu); |
c906108c | 9581 | |
a766d390 DE |
9582 | /* For now fudge the Go package. */ |
9583 | if (cu->language == language_go) | |
9584 | fixup_go_packaging (cu); | |
9585 | ||
5f48f8f3 | 9586 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9587 | should be complete, and it should now be safe to compute all of the |
9588 | physnames. */ | |
9589 | compute_delayed_physnames (cu); | |
3da10d80 | 9590 | |
c9317f21 TT |
9591 | if (cu->language == language_rust) |
9592 | rust_union_quirks (cu); | |
9593 | ||
fae299cd DC |
9594 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9595 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9596 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9597 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9598 | |
3e29f34a | 9599 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9600 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9601 | |
9602 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9603 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9604 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9605 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9606 | this comp unit. */ | |
9607 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9608 | ||
c24bdb02 | 9609 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9610 | SECT_OFF_TEXT (objfile), |
9611 | 0); | |
c906108c | 9612 | |
43f3e411 | 9613 | if (cust != NULL) |
c906108c | 9614 | { |
df15bd07 | 9615 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9616 | |
8be455d7 JK |
9617 | /* Set symtab language to language from DW_AT_language. If the |
9618 | compilation is from a C file generated by language preprocessors, do | |
9619 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9620 | if (!(cu->language == language_c |
40e3ad0e | 9621 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9622 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9623 | |
9624 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9625 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9626 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9627 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9628 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9629 | |
9630 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9631 | needed, it would be wrong due to missing DW_AT_producer there. | |
9632 | ||
9633 | Still one can confuse GDB by using non-standard GCC compilation | |
9634 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9635 | */ |
ab260dad | 9636 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9637 | cust->locations_valid = 1; |
e0d00bc7 JK |
9638 | |
9639 | if (gcc_4_minor >= 5) | |
43f3e411 | 9640 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9641 | |
43f3e411 | 9642 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9643 | } |
9291a0cd TT |
9644 | |
9645 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9646 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9647 | else |
9648 | { | |
891813be | 9649 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9650 | pst->compunit_symtab = cust; |
6d94535f | 9651 | pst->readin = true; |
9291a0cd | 9652 | } |
c906108c | 9653 | |
95554aad | 9654 | /* Push it for inclusion processing later. */ |
c5d0225d | 9655 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
9656 | |
9657 | /* Not needed any more. */ | |
c24bdb02 | 9658 | cu->reset_builder (); |
f4dc4d17 | 9659 | } |
45cfd468 | 9660 | |
f4dc4d17 DE |
9661 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9662 | already been loaded into memory. */ | |
9663 | ||
9664 | static void | |
9665 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9666 | enum language pretend_language) | |
9667 | { | |
9668 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
9669 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9670 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 9671 | struct compunit_symtab *cust; |
0186c6a7 DE |
9672 | struct signatured_type *sig_type; |
9673 | ||
9674 | gdb_assert (per_cu->is_debug_types); | |
9675 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 9676 | |
c89b44cd TT |
9677 | /* Clear the list here in case something was left over. */ |
9678 | cu->method_list.clear (); | |
f4dc4d17 | 9679 | |
f4dc4d17 DE |
9680 | cu->language = pretend_language; |
9681 | cu->language_defn = language_def (cu->language); | |
9682 | ||
9683 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9684 | process_die (cu->dies, cu); | |
9685 | ||
9686 | /* For now fudge the Go package. */ | |
9687 | if (cu->language == language_go) | |
9688 | fixup_go_packaging (cu); | |
9689 | ||
5f48f8f3 | 9690 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9691 | should be complete, and it should now be safe to compute all of the |
9692 | physnames. */ | |
9693 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9694 | |
c9317f21 TT |
9695 | if (cu->language == language_rust) |
9696 | rust_union_quirks (cu); | |
9697 | ||
f4dc4d17 DE |
9698 | /* TUs share symbol tables. |
9699 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9700 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9701 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9702 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9703 | { |
c24bdb02 KS |
9704 | buildsym_compunit *builder = cu->get_builder (); |
9705 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 9706 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 9707 | |
43f3e411 | 9708 | if (cust != NULL) |
f4dc4d17 DE |
9709 | { |
9710 | /* Set symtab language to language from DW_AT_language. If the | |
9711 | compilation is from a C file generated by language preprocessors, | |
9712 | do not set the language if it was already deduced by | |
9713 | start_subfile. */ | |
43f3e411 DE |
9714 | if (!(cu->language == language_c |
9715 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9716 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9717 | } |
9718 | } | |
9719 | else | |
9720 | { | |
c24bdb02 | 9721 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 9722 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9723 | } |
9724 | ||
9725 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9726 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9727 | else |
9728 | { | |
891813be | 9729 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9730 | pst->compunit_symtab = cust; |
6d94535f | 9731 | pst->readin = true; |
45cfd468 | 9732 | } |
804d2729 TT |
9733 | |
9734 | /* Not needed any more. */ | |
c24bdb02 | 9735 | cu->reset_builder (); |
c906108c SS |
9736 | } |
9737 | ||
95554aad TT |
9738 | /* Process an imported unit DIE. */ |
9739 | ||
9740 | static void | |
9741 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9742 | { | |
9743 | struct attribute *attr; | |
9744 | ||
f4dc4d17 DE |
9745 | /* For now we don't handle imported units in type units. */ |
9746 | if (cu->per_cu->is_debug_types) | |
9747 | { | |
9748 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9749 | " supported in type units [in module %s]"), | |
518817b3 | 9750 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
9751 | } |
9752 | ||
95554aad TT |
9753 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9754 | if (attr != NULL) | |
9755 | { | |
9c541725 PA |
9756 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9757 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9758 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 9759 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 9760 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 9761 | |
69d751e3 | 9762 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 9763 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 9764 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 9765 | |
ae640021 | 9766 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9767 | } |
9768 | } | |
9769 | ||
4c8aa72d PA |
9770 | /* RAII object that represents a process_die scope: i.e., |
9771 | starts/finishes processing a DIE. */ | |
9772 | class process_die_scope | |
adde2bff | 9773 | { |
4c8aa72d PA |
9774 | public: |
9775 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9776 | : m_die (die), m_cu (cu) | |
9777 | { | |
9778 | /* We should only be processing DIEs not already in process. */ | |
9779 | gdb_assert (!m_die->in_process); | |
9780 | m_die->in_process = true; | |
9781 | } | |
8c3cb9fa | 9782 | |
4c8aa72d PA |
9783 | ~process_die_scope () |
9784 | { | |
9785 | m_die->in_process = false; | |
9786 | ||
9787 | /* If we're done processing the DIE for the CU that owns the line | |
9788 | header, we don't need the line header anymore. */ | |
9789 | if (m_cu->line_header_die_owner == m_die) | |
9790 | { | |
9791 | delete m_cu->line_header; | |
9792 | m_cu->line_header = NULL; | |
9793 | m_cu->line_header_die_owner = NULL; | |
9794 | } | |
9795 | } | |
9796 | ||
9797 | private: | |
9798 | die_info *m_die; | |
9799 | dwarf2_cu *m_cu; | |
9800 | }; | |
adde2bff | 9801 | |
c906108c SS |
9802 | /* Process a die and its children. */ |
9803 | ||
9804 | static void | |
e7c27a73 | 9805 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9806 | { |
4c8aa72d | 9807 | process_die_scope scope (die, cu); |
adde2bff | 9808 | |
c906108c SS |
9809 | switch (die->tag) |
9810 | { | |
9811 | case DW_TAG_padding: | |
9812 | break; | |
9813 | case DW_TAG_compile_unit: | |
95554aad | 9814 | case DW_TAG_partial_unit: |
e7c27a73 | 9815 | read_file_scope (die, cu); |
c906108c | 9816 | break; |
348e048f DE |
9817 | case DW_TAG_type_unit: |
9818 | read_type_unit_scope (die, cu); | |
9819 | break; | |
c906108c | 9820 | case DW_TAG_subprogram: |
0a4b0913 AB |
9821 | /* Nested subprograms in Fortran get a prefix. */ |
9822 | if (cu->language == language_fortran | |
9823 | && die->parent != NULL | |
9824 | && die->parent->tag == DW_TAG_subprogram) | |
9825 | cu->processing_has_namespace_info = true; | |
9826 | /* Fall through. */ | |
c906108c | 9827 | case DW_TAG_inlined_subroutine: |
edb3359d | 9828 | read_func_scope (die, cu); |
c906108c SS |
9829 | break; |
9830 | case DW_TAG_lexical_block: | |
14898363 L |
9831 | case DW_TAG_try_block: |
9832 | case DW_TAG_catch_block: | |
e7c27a73 | 9833 | read_lexical_block_scope (die, cu); |
c906108c | 9834 | break; |
216f72a1 | 9835 | case DW_TAG_call_site: |
96408a79 SA |
9836 | case DW_TAG_GNU_call_site: |
9837 | read_call_site_scope (die, cu); | |
9838 | break; | |
c906108c | 9839 | case DW_TAG_class_type: |
680b30c7 | 9840 | case DW_TAG_interface_type: |
c906108c SS |
9841 | case DW_TAG_structure_type: |
9842 | case DW_TAG_union_type: | |
134d01f1 | 9843 | process_structure_scope (die, cu); |
c906108c SS |
9844 | break; |
9845 | case DW_TAG_enumeration_type: | |
134d01f1 | 9846 | process_enumeration_scope (die, cu); |
c906108c | 9847 | break; |
134d01f1 | 9848 | |
f792889a DJ |
9849 | /* These dies have a type, but processing them does not create |
9850 | a symbol or recurse to process the children. Therefore we can | |
9851 | read them on-demand through read_type_die. */ | |
c906108c | 9852 | case DW_TAG_subroutine_type: |
72019c9c | 9853 | case DW_TAG_set_type: |
c906108c | 9854 | case DW_TAG_array_type: |
c906108c | 9855 | case DW_TAG_pointer_type: |
c906108c | 9856 | case DW_TAG_ptr_to_member_type: |
c906108c | 9857 | case DW_TAG_reference_type: |
4297a3f0 | 9858 | case DW_TAG_rvalue_reference_type: |
c906108c | 9859 | case DW_TAG_string_type: |
c906108c | 9860 | break; |
134d01f1 | 9861 | |
c906108c | 9862 | case DW_TAG_base_type: |
a02abb62 | 9863 | case DW_TAG_subrange_type: |
cb249c71 | 9864 | case DW_TAG_typedef: |
134d01f1 DJ |
9865 | /* Add a typedef symbol for the type definition, if it has a |
9866 | DW_AT_name. */ | |
f792889a | 9867 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9868 | break; |
c906108c | 9869 | case DW_TAG_common_block: |
e7c27a73 | 9870 | read_common_block (die, cu); |
c906108c SS |
9871 | break; |
9872 | case DW_TAG_common_inclusion: | |
9873 | break; | |
d9fa45fe | 9874 | case DW_TAG_namespace: |
9068261f | 9875 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9876 | read_namespace (die, cu); |
d9fa45fe | 9877 | break; |
5d7cb8df | 9878 | case DW_TAG_module: |
9068261f | 9879 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9880 | read_module (die, cu); |
9881 | break; | |
d9fa45fe | 9882 | case DW_TAG_imported_declaration: |
9068261f | 9883 | cu->processing_has_namespace_info = true; |
74921315 KS |
9884 | if (read_namespace_alias (die, cu)) |
9885 | break; | |
86a73007 TT |
9886 | /* The declaration is not a global namespace alias. */ |
9887 | /* Fall through. */ | |
d9fa45fe | 9888 | case DW_TAG_imported_module: |
9068261f | 9889 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9890 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9891 | || cu->language != language_fortran)) | |
b98664d3 | 9892 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9893 | dwarf_tag_name (die->tag)); |
9894 | read_import_statement (die, cu); | |
d9fa45fe | 9895 | break; |
95554aad TT |
9896 | |
9897 | case DW_TAG_imported_unit: | |
9898 | process_imported_unit_die (die, cu); | |
9899 | break; | |
9900 | ||
71a3c369 TT |
9901 | case DW_TAG_variable: |
9902 | read_variable (die, cu); | |
9903 | break; | |
9904 | ||
c906108c | 9905 | default: |
e7c27a73 | 9906 | new_symbol (die, NULL, cu); |
c906108c SS |
9907 | break; |
9908 | } | |
9909 | } | |
ca69b9e6 DE |
9910 | \f |
9911 | /* DWARF name computation. */ | |
c906108c | 9912 | |
94af9270 KS |
9913 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9914 | needs to have the name of the scope prepended to the name listed in the | |
9915 | die. */ | |
9916 | ||
9917 | static int | |
9918 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9919 | { | |
1c809c68 TT |
9920 | struct attribute *attr; |
9921 | ||
94af9270 KS |
9922 | switch (die->tag) |
9923 | { | |
9924 | case DW_TAG_namespace: | |
9925 | case DW_TAG_typedef: | |
9926 | case DW_TAG_class_type: | |
9927 | case DW_TAG_interface_type: | |
9928 | case DW_TAG_structure_type: | |
9929 | case DW_TAG_union_type: | |
9930 | case DW_TAG_enumeration_type: | |
9931 | case DW_TAG_enumerator: | |
9932 | case DW_TAG_subprogram: | |
08a76f8a | 9933 | case DW_TAG_inlined_subroutine: |
94af9270 | 9934 | case DW_TAG_member: |
74921315 | 9935 | case DW_TAG_imported_declaration: |
94af9270 KS |
9936 | return 1; |
9937 | ||
9938 | case DW_TAG_variable: | |
c2b0a229 | 9939 | case DW_TAG_constant: |
94af9270 KS |
9940 | /* We only need to prefix "globally" visible variables. These include |
9941 | any variable marked with DW_AT_external or any variable that | |
9942 | lives in a namespace. [Variables in anonymous namespaces | |
9943 | require prefixing, but they are not DW_AT_external.] */ | |
9944 | ||
9945 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9946 | { | |
9947 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9948 | |
94af9270 KS |
9949 | return die_needs_namespace (die_specification (die, &spec_cu), |
9950 | spec_cu); | |
9951 | } | |
9952 | ||
1c809c68 | 9953 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9954 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9955 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9956 | return 0; |
9957 | /* A variable in a lexical block of some kind does not need a | |
9958 | namespace, even though in C++ such variables may be external | |
9959 | and have a mangled name. */ | |
9960 | if (die->parent->tag == DW_TAG_lexical_block | |
9961 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9962 | || die->parent->tag == DW_TAG_catch_block |
9963 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9964 | return 0; |
9965 | return 1; | |
94af9270 KS |
9966 | |
9967 | default: | |
9968 | return 0; | |
9969 | } | |
9970 | } | |
9971 | ||
73b9be8b KS |
9972 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9973 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9974 | defined for the given DIE. */ | |
9975 | ||
9976 | static struct attribute * | |
9977 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9978 | { | |
9979 | struct attribute *attr; | |
9980 | ||
9981 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9982 | if (attr == NULL) | |
9983 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9984 | ||
9985 | return attr; | |
9986 | } | |
9987 | ||
9988 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9989 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9990 | defined for the given DIE. */ | |
9991 | ||
9992 | static const char * | |
9993 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9994 | { | |
9995 | const char *linkage_name; | |
9996 | ||
9997 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9998 | if (linkage_name == NULL) | |
9999 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10000 | ||
10001 | return linkage_name; | |
10002 | } | |
10003 | ||
94af9270 | 10004 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10005 | compute the physname for the object, which include a method's: |
9c37b5ae | 10006 | - formal parameters (C++), |
a766d390 | 10007 | - receiver type (Go), |
a766d390 DE |
10008 | |
10009 | The term "physname" is a bit confusing. | |
10010 | For C++, for example, it is the demangled name. | |
10011 | For Go, for example, it's the mangled name. | |
94af9270 | 10012 | |
af6b7be1 JB |
10013 | For Ada, return the DIE's linkage name rather than the fully qualified |
10014 | name. PHYSNAME is ignored.. | |
10015 | ||
94af9270 KS |
10016 | The result is allocated on the objfile_obstack and canonicalized. */ |
10017 | ||
10018 | static const char * | |
15d034d0 TT |
10019 | dwarf2_compute_name (const char *name, |
10020 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10021 | int physname) |
10022 | { | |
518817b3 | 10023 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10024 | |
94af9270 KS |
10025 | if (name == NULL) |
10026 | name = dwarf2_name (die, cu); | |
10027 | ||
2ee7123e DE |
10028 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10029 | but otherwise compute it by typename_concat inside GDB. | |
10030 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 10031 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 10032 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10033 | will set the demangled name to the result of dwarf2_full_name, and it is |
10034 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10035 | if (cu->language == language_ada |
10036 | || (cu->language == language_fortran && physname)) | |
10037 | { | |
10038 | /* For Ada unit, we prefer the linkage name over the name, as | |
10039 | the former contains the exported name, which the user expects | |
10040 | to be able to reference. Ideally, we want the user to be able | |
10041 | to reference this entity using either natural or linkage name, | |
10042 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10043 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10044 | |
2ee7123e DE |
10045 | if (linkage_name != NULL) |
10046 | return linkage_name; | |
f55ee35c JK |
10047 | } |
10048 | ||
94af9270 KS |
10049 | /* These are the only languages we know how to qualify names in. */ |
10050 | if (name != NULL | |
9c37b5ae | 10051 | && (cu->language == language_cplus |
c44af4eb TT |
10052 | || cu->language == language_fortran || cu->language == language_d |
10053 | || cu->language == language_rust)) | |
94af9270 KS |
10054 | { |
10055 | if (die_needs_namespace (die, cu)) | |
10056 | { | |
0d5cff50 | 10057 | const char *prefix; |
34a68019 | 10058 | const char *canonical_name = NULL; |
94af9270 | 10059 | |
d7e74731 PA |
10060 | string_file buf; |
10061 | ||
94af9270 | 10062 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10063 | if (*prefix != '\0') |
10064 | { | |
43816ebc TT |
10065 | gdb::unique_xmalloc_ptr<char> prefixed_name |
10066 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 10067 | |
43816ebc | 10068 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
10069 | } |
10070 | else | |
d7e74731 | 10071 | buf.puts (name); |
94af9270 | 10072 | |
98bfdba5 PA |
10073 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10074 | as children with DW_TAG_template_type_param or | |
10075 | DW_TAG_value_type_param. If the latter, add them to the name | |
10076 | here. If the name already has template parameters, then | |
10077 | skip this step; some versions of GCC emit both, and | |
10078 | it is more efficient to use the pre-computed name. | |
10079 | ||
10080 | Something to keep in mind about this process: it is very | |
10081 | unlikely, or in some cases downright impossible, to produce | |
10082 | something that will match the mangled name of a function. | |
10083 | If the definition of the function has the same debug info, | |
10084 | we should be able to match up with it anyway. But fallbacks | |
10085 | using the minimal symbol, for instance to find a method | |
10086 | implemented in a stripped copy of libstdc++, will not work. | |
10087 | If we do not have debug info for the definition, we will have to | |
10088 | match them up some other way. | |
10089 | ||
10090 | When we do name matching there is a related problem with function | |
10091 | templates; two instantiated function templates are allowed to | |
10092 | differ only by their return types, which we do not add here. */ | |
10093 | ||
10094 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10095 | { | |
10096 | struct attribute *attr; | |
10097 | struct die_info *child; | |
10098 | int first = 1; | |
10099 | ||
10100 | die->building_fullname = 1; | |
10101 | ||
10102 | for (child = die->child; child != NULL; child = child->sibling) | |
10103 | { | |
10104 | struct type *type; | |
12df843f | 10105 | LONGEST value; |
d521ce57 | 10106 | const gdb_byte *bytes; |
98bfdba5 PA |
10107 | struct dwarf2_locexpr_baton *baton; |
10108 | struct value *v; | |
10109 | ||
10110 | if (child->tag != DW_TAG_template_type_param | |
10111 | && child->tag != DW_TAG_template_value_param) | |
10112 | continue; | |
10113 | ||
10114 | if (first) | |
10115 | { | |
d7e74731 | 10116 | buf.puts ("<"); |
98bfdba5 PA |
10117 | first = 0; |
10118 | } | |
10119 | else | |
d7e74731 | 10120 | buf.puts (", "); |
98bfdba5 PA |
10121 | |
10122 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10123 | if (attr == NULL) | |
10124 | { | |
b98664d3 | 10125 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10126 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10127 | continue; |
10128 | } | |
10129 | type = die_type (child, cu); | |
10130 | ||
10131 | if (child->tag == DW_TAG_template_type_param) | |
10132 | { | |
c1ec8cea TT |
10133 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10134 | &type_print_raw_options); | |
98bfdba5 PA |
10135 | continue; |
10136 | } | |
10137 | ||
10138 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10139 | if (attr == NULL) | |
10140 | { | |
b98664d3 | 10141 | complaint (_("template parameter missing " |
3e43a32a | 10142 | "DW_AT_const_value")); |
d7e74731 | 10143 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10144 | continue; |
10145 | } | |
10146 | ||
10147 | dwarf2_const_value_attr (attr, type, name, | |
10148 | &cu->comp_unit_obstack, cu, | |
10149 | &value, &bytes, &baton); | |
10150 | ||
10151 | if (TYPE_NOSIGN (type)) | |
10152 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10153 | changed, this can use value_print instead. */ | |
d7e74731 | 10154 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10155 | else |
10156 | { | |
10157 | struct value_print_options opts; | |
10158 | ||
10159 | if (baton != NULL) | |
10160 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10161 | baton->data, | |
10162 | baton->size, | |
10163 | baton->per_cu); | |
10164 | else if (bytes != NULL) | |
10165 | { | |
10166 | v = allocate_value (type); | |
10167 | memcpy (value_contents_writeable (v), bytes, | |
10168 | TYPE_LENGTH (type)); | |
10169 | } | |
10170 | else | |
10171 | v = value_from_longest (type, value); | |
10172 | ||
3e43a32a MS |
10173 | /* Specify decimal so that we do not depend on |
10174 | the radix. */ | |
98bfdba5 PA |
10175 | get_formatted_print_options (&opts, 'd'); |
10176 | opts.raw = 1; | |
d7e74731 | 10177 | value_print (v, &buf, &opts); |
98bfdba5 | 10178 | release_value (v); |
98bfdba5 PA |
10179 | } |
10180 | } | |
10181 | ||
10182 | die->building_fullname = 0; | |
10183 | ||
10184 | if (!first) | |
10185 | { | |
10186 | /* Close the argument list, with a space if necessary | |
10187 | (nested templates). */ | |
d7e74731 PA |
10188 | if (!buf.empty () && buf.string ().back () == '>') |
10189 | buf.puts (" >"); | |
98bfdba5 | 10190 | else |
d7e74731 | 10191 | buf.puts (">"); |
98bfdba5 PA |
10192 | } |
10193 | } | |
10194 | ||
9c37b5ae | 10195 | /* For C++ methods, append formal parameter type |
94af9270 | 10196 | information, if PHYSNAME. */ |
6e70227d | 10197 | |
94af9270 | 10198 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10199 | && cu->language == language_cplus) |
94af9270 KS |
10200 | { |
10201 | struct type *type = read_type_die (die, cu); | |
10202 | ||
d7e74731 | 10203 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10204 | &type_print_raw_options); |
94af9270 | 10205 | |
9c37b5ae | 10206 | if (cu->language == language_cplus) |
94af9270 | 10207 | { |
60430eff DJ |
10208 | /* Assume that an artificial first parameter is |
10209 | "this", but do not crash if it is not. RealView | |
10210 | marks unnamed (and thus unused) parameters as | |
10211 | artificial; there is no way to differentiate | |
10212 | the two cases. */ | |
94af9270 KS |
10213 | if (TYPE_NFIELDS (type) > 0 |
10214 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 10215 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
10216 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10217 | 0)))) | |
d7e74731 | 10218 | buf.puts (" const"); |
94af9270 KS |
10219 | } |
10220 | } | |
10221 | ||
d7e74731 | 10222 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10223 | |
10224 | if (cu->language == language_cplus) | |
34a68019 | 10225 | canonical_name |
322a8516 | 10226 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
be1e3d3e | 10227 | objfile); |
34a68019 TT |
10228 | |
10229 | /* If we only computed INTERMEDIATE_NAME, or if | |
10230 | INTERMEDIATE_NAME is already canonical, then we need to | |
be1e3d3e | 10231 | intern it. */ |
322a8516 | 10232 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
be1e3d3e | 10233 | name = objfile->intern (intermediate_name); |
34a68019 TT |
10234 | else |
10235 | name = canonical_name; | |
94af9270 KS |
10236 | } |
10237 | } | |
10238 | ||
10239 | return name; | |
10240 | } | |
10241 | ||
0114d602 DJ |
10242 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10243 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10244 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10245 | not have a name. NAME may either be from a previous call to |
10246 | dwarf2_name or NULL. | |
10247 | ||
9c37b5ae | 10248 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10249 | |
10250 | static const char * | |
15d034d0 | 10251 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10252 | { |
94af9270 KS |
10253 | return dwarf2_compute_name (name, die, cu, 0); |
10254 | } | |
0114d602 | 10255 | |
94af9270 KS |
10256 | /* Construct a physname for the given DIE in CU. NAME may either be |
10257 | from a previous call to dwarf2_name or NULL. The result will be | |
10258 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10259 | name. | |
0114d602 | 10260 | |
9c37b5ae | 10261 | The output string will be canonicalized (if C++). */ |
0114d602 | 10262 | |
94af9270 | 10263 | static const char * |
15d034d0 | 10264 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10265 | { |
518817b3 | 10266 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 10267 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10268 | int need_copy = 1; |
10269 | ||
10270 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10271 | on its own. */ | |
10272 | if (!die_needs_namespace (die, cu)) | |
10273 | return dwarf2_compute_name (name, die, cu, 1); | |
10274 | ||
73b9be8b | 10275 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 10276 | |
e98c9e7c TT |
10277 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
10278 | See https://github.com/rust-lang/rust/issues/32925. */ | |
10279 | if (cu->language == language_rust && mangled != NULL | |
10280 | && strchr (mangled, '{') != NULL) | |
10281 | mangled = NULL; | |
10282 | ||
900e11f9 JK |
10283 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
10284 | has computed. */ | |
791afaa2 | 10285 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10286 | if (mangled != NULL) |
900e11f9 | 10287 | { |
900e11f9 | 10288 | |
59cc4834 JB |
10289 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
10290 | { | |
10291 | /* Do nothing (do not demangle the symbol name). */ | |
10292 | } | |
10293 | else if (cu->language == language_go) | |
a766d390 | 10294 | { |
5e2db402 TT |
10295 | /* This is a lie, but we already lie to the caller new_symbol. |
10296 | new_symbol assumes we return the mangled name. | |
a766d390 | 10297 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
10298 | } |
10299 | else | |
10300 | { | |
0eb876f5 JB |
10301 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10302 | their return type. It is easier for GDB users to search | |
10303 | for such functions as `name(params)' than `long name(params)'. | |
10304 | In such case the minimal symbol names do not match the full | |
10305 | symbol names but for template functions there is never a need | |
10306 | to look up their definition from their declaration so | |
10307 | the only disadvantage remains the minimal symbol variant | |
10308 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10309 | demangled.reset (gdb_demangle (mangled, |
10310 | (DMGL_PARAMS | DMGL_ANSI | |
10311 | | DMGL_RET_DROP))); | |
a766d390 | 10312 | } |
900e11f9 | 10313 | if (demangled) |
791afaa2 | 10314 | canon = demangled.get (); |
900e11f9 JK |
10315 | else |
10316 | { | |
10317 | canon = mangled; | |
10318 | need_copy = 0; | |
10319 | } | |
10320 | } | |
10321 | ||
10322 | if (canon == NULL || check_physname) | |
10323 | { | |
10324 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10325 | ||
10326 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10327 | { | |
10328 | /* It may not mean a bug in GDB. The compiler could also | |
10329 | compute DW_AT_linkage_name incorrectly. But in such case | |
10330 | GDB would need to be bug-to-bug compatible. */ | |
10331 | ||
b98664d3 | 10332 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10333 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10334 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10335 | objfile_name (objfile)); |
900e11f9 JK |
10336 | |
10337 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10338 | is available here - over computed PHYSNAME. It is safer | |
10339 | against both buggy GDB and buggy compilers. */ | |
10340 | ||
10341 | retval = canon; | |
10342 | } | |
10343 | else | |
10344 | { | |
10345 | retval = physname; | |
10346 | need_copy = 0; | |
10347 | } | |
10348 | } | |
10349 | else | |
10350 | retval = canon; | |
10351 | ||
10352 | if (need_copy) | |
be1e3d3e | 10353 | retval = objfile->intern (retval); |
900e11f9 | 10354 | |
900e11f9 | 10355 | return retval; |
0114d602 DJ |
10356 | } |
10357 | ||
74921315 KS |
10358 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10359 | a new symbol for it. | |
10360 | ||
10361 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10362 | ||
10363 | static int | |
10364 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10365 | { | |
10366 | struct attribute *attr; | |
10367 | ||
10368 | /* If the die does not have a name, this is not a namespace | |
10369 | alias. */ | |
10370 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10371 | if (attr != NULL) | |
10372 | { | |
10373 | int num; | |
10374 | struct die_info *d = die; | |
10375 | struct dwarf2_cu *imported_cu = cu; | |
10376 | ||
10377 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10378 | keep inspecting DIEs until we hit the underlying import. */ | |
10379 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10380 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10381 | { | |
10382 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10383 | if (attr == NULL) | |
10384 | break; | |
10385 | ||
10386 | d = follow_die_ref (d, attr, &imported_cu); | |
10387 | if (d->tag != DW_TAG_imported_declaration) | |
10388 | break; | |
10389 | } | |
10390 | ||
10391 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10392 | { | |
b98664d3 | 10393 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10394 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10395 | return 0; |
10396 | } | |
10397 | ||
10398 | if (attr != NULL) | |
10399 | { | |
10400 | struct type *type; | |
9c541725 | 10401 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 10402 | |
9c541725 | 10403 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
10404 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
10405 | { | |
10406 | /* This declaration is a global namespace alias. Add | |
10407 | a symbol for it whose type is the aliased namespace. */ | |
10408 | new_symbol (die, type, cu); | |
10409 | return 1; | |
10410 | } | |
10411 | } | |
10412 | } | |
10413 | ||
10414 | return 0; | |
10415 | } | |
10416 | ||
22cee43f | 10417 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10418 | current context for CU. |
22cee43f PMR |
10419 | |
10420 | For Ada, imported declarations can materialize renamings, which *may* be | |
10421 | global. However it is impossible (for now?) in DWARF to distinguish | |
10422 | "external" imported declarations and "static" ones. As all imported | |
10423 | declarations seem to be static in all other languages, make them all CU-wide | |
10424 | global only in Ada. */ | |
10425 | ||
10426 | static struct using_direct ** | |
804d2729 | 10427 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10428 | { |
c24bdb02 KS |
10429 | if (cu->language == language_ada |
10430 | && cu->get_builder ()->outermost_context_p ()) | |
10431 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10432 | else |
c24bdb02 | 10433 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10434 | } |
10435 | ||
27aa8d6a SW |
10436 | /* Read the import statement specified by the given die and record it. */ |
10437 | ||
10438 | static void | |
10439 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10440 | { | |
518817b3 | 10441 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 10442 | struct attribute *import_attr; |
32019081 | 10443 | struct die_info *imported_die, *child_die; |
de4affc9 | 10444 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10445 | const char *imported_name; |
794684b6 | 10446 | const char *imported_name_prefix; |
13387711 SW |
10447 | const char *canonical_name; |
10448 | const char *import_alias; | |
10449 | const char *imported_declaration = NULL; | |
794684b6 | 10450 | const char *import_prefix; |
eb1e02fd | 10451 | std::vector<const char *> excludes; |
13387711 | 10452 | |
27aa8d6a SW |
10453 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10454 | if (import_attr == NULL) | |
10455 | { | |
b98664d3 | 10456 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10457 | dwarf_tag_name (die->tag)); |
10458 | return; | |
10459 | } | |
10460 | ||
de4affc9 CC |
10461 | imported_cu = cu; |
10462 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10463 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10464 | if (imported_name == NULL) |
10465 | { | |
10466 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10467 | ||
10468 | The import in the following code: | |
10469 | namespace A | |
10470 | { | |
10471 | typedef int B; | |
10472 | } | |
10473 | ||
10474 | int main () | |
10475 | { | |
10476 | using A::B; | |
10477 | B b; | |
10478 | return b; | |
10479 | } | |
10480 | ||
10481 | ... | |
10482 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10483 | <52> DW_AT_decl_file : 1 | |
10484 | <53> DW_AT_decl_line : 6 | |
10485 | <54> DW_AT_import : <0x75> | |
10486 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10487 | <59> DW_AT_name : B | |
10488 | <5b> DW_AT_decl_file : 1 | |
10489 | <5c> DW_AT_decl_line : 2 | |
10490 | <5d> DW_AT_type : <0x6e> | |
10491 | ... | |
10492 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10493 | <76> DW_AT_byte_size : 4 | |
10494 | <77> DW_AT_encoding : 5 (signed) | |
10495 | ||
10496 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10497 | This case will be ignored until the gcc bug is fixed. */ | |
10498 | return; | |
10499 | } | |
10500 | ||
82856980 SW |
10501 | /* Figure out the local name after import. */ |
10502 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10503 | |
794684b6 SW |
10504 | /* Figure out where the statement is being imported to. */ |
10505 | import_prefix = determine_prefix (die, cu); | |
10506 | ||
10507 | /* Figure out what the scope of the imported die is and prepend it | |
10508 | to the name of the imported die. */ | |
de4affc9 | 10509 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10510 | |
f55ee35c JK |
10511 | if (imported_die->tag != DW_TAG_namespace |
10512 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10513 | { |
13387711 SW |
10514 | imported_declaration = imported_name; |
10515 | canonical_name = imported_name_prefix; | |
794684b6 | 10516 | } |
13387711 | 10517 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10518 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10519 | imported_name_prefix, |
10520 | (cu->language == language_d ? "." : "::"), | |
10521 | imported_name, (char *) NULL); | |
13387711 SW |
10522 | else |
10523 | canonical_name = imported_name; | |
794684b6 | 10524 | |
32019081 JK |
10525 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10526 | for (child_die = die->child; child_die && child_die->tag; | |
10527 | child_die = sibling_die (child_die)) | |
10528 | { | |
10529 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10530 | represented by an imported module entry with an import attribute | |
10531 | referring to the module and owned entries corresponding to those | |
10532 | entities that are renamed as part of being imported. */ | |
10533 | ||
10534 | if (child_die->tag != DW_TAG_imported_declaration) | |
10535 | { | |
b98664d3 | 10536 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10537 | "- DIE at %s [in module %s]"), |
10538 | sect_offset_str (child_die->sect_off), | |
10539 | objfile_name (objfile)); | |
32019081 JK |
10540 | continue; |
10541 | } | |
10542 | ||
10543 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10544 | if (import_attr == NULL) | |
10545 | { | |
b98664d3 | 10546 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10547 | dwarf_tag_name (child_die->tag)); |
10548 | continue; | |
10549 | } | |
10550 | ||
10551 | imported_cu = cu; | |
10552 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10553 | &imported_cu); | |
10554 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10555 | if (imported_name == NULL) | |
10556 | { | |
b98664d3 | 10557 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10558 | "imported name - DIE at %s [in module %s]"), |
10559 | sect_offset_str (child_die->sect_off), | |
10560 | objfile_name (objfile)); | |
32019081 JK |
10561 | continue; |
10562 | } | |
10563 | ||
eb1e02fd | 10564 | excludes.push_back (imported_name); |
32019081 JK |
10565 | |
10566 | process_die (child_die, cu); | |
10567 | } | |
10568 | ||
804d2729 | 10569 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10570 | import_prefix, |
10571 | canonical_name, | |
10572 | import_alias, | |
10573 | imported_declaration, | |
10574 | excludes, | |
10575 | 0, | |
10576 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10577 | } |
10578 | ||
5230b05a WT |
10579 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10580 | types, but gives them a size of zero. Starting with version 14, | |
10581 | ICC is compatible with GCC. */ | |
10582 | ||
9068261f | 10583 | static bool |
5230b05a WT |
10584 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10585 | { | |
10586 | if (!cu->checked_producer) | |
10587 | check_producer (cu); | |
10588 | ||
10589 | return cu->producer_is_icc_lt_14; | |
10590 | } | |
10591 | ||
eb77c9df AB |
10592 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10593 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10594 | which says that void functions should not have a DW_AT_type. */ | |
10595 | ||
10596 | static bool | |
10597 | producer_is_icc (struct dwarf2_cu *cu) | |
10598 | { | |
10599 | if (!cu->checked_producer) | |
10600 | check_producer (cu); | |
10601 | ||
10602 | return cu->producer_is_icc; | |
10603 | } | |
10604 | ||
1b80a9fa JK |
10605 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10606 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10607 | this, it was first present in GCC release 4.3.0. */ | |
10608 | ||
9068261f | 10609 | static bool |
1b80a9fa JK |
10610 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10611 | { | |
10612 | if (!cu->checked_producer) | |
10613 | check_producer (cu); | |
10614 | ||
10615 | return cu->producer_is_gcc_lt_4_3; | |
10616 | } | |
10617 | ||
d721ba37 PA |
10618 | static file_and_directory |
10619 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10620 | { |
d721ba37 PA |
10621 | file_and_directory res; |
10622 | ||
9291a0cd TT |
10623 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10624 | is not a source language identifier. */ | |
d721ba37 PA |
10625 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10626 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10627 | |
d721ba37 PA |
10628 | if (res.comp_dir == NULL |
10629 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10630 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10631 | { |
d721ba37 PA |
10632 | res.comp_dir_storage = ldirname (res.name); |
10633 | if (!res.comp_dir_storage.empty ()) | |
10634 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10635 | } |
d721ba37 | 10636 | if (res.comp_dir != NULL) |
9291a0cd TT |
10637 | { |
10638 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10639 | directory, get rid of it. */ | |
d721ba37 | 10640 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10641 | |
d721ba37 PA |
10642 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10643 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10644 | } |
10645 | ||
d721ba37 PA |
10646 | if (res.name == NULL) |
10647 | res.name = "<unknown>"; | |
10648 | ||
10649 | return res; | |
9291a0cd TT |
10650 | } |
10651 | ||
f4dc4d17 DE |
10652 | /* Handle DW_AT_stmt_list for a compilation unit. |
10653 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10654 | COMP_DIR is the compilation directory. LOWPC is passed to |
10655 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10656 | |
10657 | static void | |
10658 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10659 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10660 | { |
518817b3 SM |
10661 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10662 | = cu->per_cu->dwarf2_per_objfile; | |
2ab95328 | 10663 | struct attribute *attr; |
527f3840 JK |
10664 | struct line_header line_header_local; |
10665 | hashval_t line_header_local_hash; | |
527f3840 JK |
10666 | void **slot; |
10667 | int decode_mapping; | |
2ab95328 | 10668 | |
f4dc4d17 DE |
10669 | gdb_assert (! cu->per_cu->is_debug_types); |
10670 | ||
2ab95328 | 10671 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10672 | if (attr == NULL) |
10673 | return; | |
10674 | ||
9c541725 | 10675 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10676 | |
10677 | /* The line header hash table is only created if needed (it exists to | |
10678 | prevent redundant reading of the line table for partial_units). | |
10679 | If we're given a partial_unit, we'll need it. If we're given a | |
10680 | compile_unit, then use the line header hash table if it's already | |
10681 | created, but don't create one just yet. */ | |
10682 | ||
10683 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10684 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10685 | { |
527f3840 | 10686 | dwarf2_per_objfile->line_header_hash |
d15acc42 TT |
10687 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10688 | line_header_eq_voidp, | |
10689 | free_line_header_voidp, | |
10690 | xcalloc, xfree)); | |
527f3840 | 10691 | } |
2ab95328 | 10692 | |
9c541725 | 10693 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10694 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10695 | line_header_local_hash = line_header_hash (&line_header_local); | |
10696 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10697 | { | |
d15acc42 | 10698 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10699 | &line_header_local, |
10700 | line_header_local_hash, NO_INSERT); | |
10701 | ||
10702 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10703 | is not present in *SLOT (since if there is something in *SLOT then | |
10704 | it will be for a partial_unit). */ | |
10705 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10706 | { |
527f3840 | 10707 | gdb_assert (*slot != NULL); |
9a3c8263 | 10708 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10709 | return; |
dee91e82 | 10710 | } |
2ab95328 | 10711 | } |
527f3840 JK |
10712 | |
10713 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10714 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10715 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10716 | if (lh == NULL) | |
527f3840 | 10717 | return; |
4c8aa72d PA |
10718 | |
10719 | cu->line_header = lh.release (); | |
10720 | cu->line_header_die_owner = die; | |
527f3840 JK |
10721 | |
10722 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10723 | slot = NULL; | |
10724 | else | |
10725 | { | |
d15acc42 | 10726 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10727 | &line_header_local, |
10728 | line_header_local_hash, INSERT); | |
10729 | gdb_assert (slot != NULL); | |
10730 | } | |
10731 | if (slot != NULL && *slot == NULL) | |
10732 | { | |
10733 | /* This newly decoded line number information unit will be owned | |
10734 | by line_header_hash hash table. */ | |
10735 | *slot = cu->line_header; | |
4c8aa72d | 10736 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10737 | } |
10738 | else | |
10739 | { | |
10740 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10741 | may be already used by multiple CUs. Create only temporary decoded | |
10742 | line_header for this CU - it may happen at most once for each line | |
10743 | number information unit. And if we're not using line_header_hash | |
10744 | then this is what we want as well. */ | |
10745 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10746 | } |
10747 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10748 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10749 | decode_mapping); | |
fff8551c | 10750 | |
2ab95328 TT |
10751 | } |
10752 | ||
95554aad | 10753 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10754 | |
c906108c | 10755 | static void |
e7c27a73 | 10756 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10757 | { |
518817b3 SM |
10758 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10759 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 10760 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10761 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10762 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10763 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10764 | struct attribute *attr; | |
c906108c | 10765 | struct die_info *child_die; |
e142c38c | 10766 | CORE_ADDR baseaddr; |
6e70227d | 10767 | |
380618d6 | 10768 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10769 | baseaddr = objfile->text_section_offset (); |
c906108c | 10770 | |
fae299cd | 10771 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10772 | |
10773 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10774 | from finish_block. */ | |
2acceee2 | 10775 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10776 | lowpc = highpc; |
3e29f34a | 10777 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10778 | |
d721ba37 | 10779 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10780 | |
f4b8a18d KW |
10781 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10782 | standardised yet. As a workaround for the language detection we fall | |
10783 | back to the DW_AT_producer string. */ | |
10784 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10785 | cu->language = language_opencl; | |
10786 | ||
3019eac3 DE |
10787 | /* Similar hack for Go. */ |
10788 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10789 | set_cu_language (DW_LANG_Go, cu); | |
10790 | ||
c24bdb02 | 10791 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10792 | |
10793 | /* Decode line number information if present. We do this before | |
10794 | processing child DIEs, so that the line header table is available | |
10795 | for DW_AT_decl_file. */ | |
d721ba37 | 10796 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10797 | |
10798 | /* Process all dies in compilation unit. */ | |
10799 | if (die->child != NULL) | |
10800 | { | |
10801 | child_die = die->child; | |
10802 | while (child_die && child_die->tag) | |
10803 | { | |
10804 | process_die (child_die, cu); | |
10805 | child_die = sibling_die (child_die); | |
10806 | } | |
10807 | } | |
10808 | ||
10809 | /* Decode macro information, if present. Dwarf 2 macro information | |
10810 | refers to information in the line number info statement program | |
10811 | header, so we can only read it if we've read the header | |
10812 | successfully. */ | |
0af92d60 JK |
10813 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10814 | if (attr == NULL) | |
10815 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10816 | if (attr && cu->line_header) |
10817 | { | |
10818 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10819 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10820 | |
43f3e411 | 10821 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10822 | } |
10823 | else | |
10824 | { | |
10825 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10826 | if (attr && cu->line_header) | |
10827 | { | |
10828 | unsigned int macro_offset = DW_UNSND (attr); | |
10829 | ||
43f3e411 | 10830 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10831 | } |
10832 | } | |
3019eac3 DE |
10833 | } |
10834 | ||
c24bdb02 KS |
10835 | void |
10836 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10837 | { |
f4dc4d17 DE |
10838 | struct type_unit_group *tu_group; |
10839 | int first_time; | |
3019eac3 | 10840 | struct attribute *attr; |
9c541725 | 10841 | unsigned int i; |
0186c6a7 | 10842 | struct signatured_type *sig_type; |
3019eac3 | 10843 | |
f4dc4d17 | 10844 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10845 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10846 | |
c24bdb02 | 10847 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10848 | |
f4dc4d17 | 10849 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10850 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10851 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10852 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10853 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10854 | |
10855 | /* If we've already processed this stmt_list there's no real need to | |
10856 | do it again, we could fake it and just recreate the part we need | |
10857 | (file name,index -> symtab mapping). If data shows this optimization | |
10858 | is useful we can do it then. */ | |
43f3e411 | 10859 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10860 | |
10861 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10862 | debug info. */ | |
fff8551c | 10863 | line_header_up lh; |
f4dc4d17 | 10864 | if (attr != NULL) |
3019eac3 | 10865 | { |
9c541725 | 10866 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 10867 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10868 | } |
10869 | if (lh == NULL) | |
10870 | { | |
10871 | if (first_time) | |
c24bdb02 | 10872 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10873 | else |
10874 | { | |
10875 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 10876 | gdb_assert (m_builder == nullptr); |
804d2729 | 10877 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10878 | m_builder.reset (new struct buildsym_compunit |
10879 | (COMPUNIT_OBJFILE (cust), "", | |
10880 | COMPUNIT_DIRNAME (cust), | |
10881 | compunit_language (cust), | |
10882 | 0, cust)); | |
f4dc4d17 | 10883 | } |
f4dc4d17 | 10884 | return; |
3019eac3 DE |
10885 | } |
10886 | ||
c24bdb02 KS |
10887 | line_header = lh.release (); |
10888 | line_header_die_owner = die; | |
3019eac3 | 10889 | |
f4dc4d17 DE |
10890 | if (first_time) |
10891 | { | |
c24bdb02 | 10892 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10893 | |
1fd60fc0 DE |
10894 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10895 | still initializing it, and our caller (a few levels up) | |
10896 | process_full_type_unit still needs to know if this is the first | |
10897 | time. */ | |
10898 | ||
4ac93832 TT |
10899 | tu_group->symtabs |
10900 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, | |
10901 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10902 | |
7ba99d21 AT |
10903 | auto &file_names = line_header->file_names (); |
10904 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10905 | { |
7ba99d21 | 10906 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10907 | dwarf2_start_subfile (this, fe.name, |
10908 | fe.include_dir (line_header)); | |
10909 | buildsym_compunit *b = get_builder (); | |
10910 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10911 | { |
4c8aa72d PA |
10912 | /* NOTE: start_subfile will recognize when it's been |
10913 | passed a file it has already seen. So we can't | |
10914 | assume there's a simple mapping from | |
10915 | cu->line_header->file_names to subfiles, plus | |
10916 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
10917 | b->get_current_subfile ()->symtab |
10918 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
10919 | } |
10920 | ||
c24bdb02 | 10921 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 10922 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
10923 | } |
10924 | } | |
10925 | else | |
3019eac3 | 10926 | { |
c24bdb02 | 10927 | gdb_assert (m_builder == nullptr); |
804d2729 | 10928 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10929 | m_builder.reset (new struct buildsym_compunit |
10930 | (COMPUNIT_OBJFILE (cust), "", | |
10931 | COMPUNIT_DIRNAME (cust), | |
10932 | compunit_language (cust), | |
10933 | 0, cust)); | |
f4dc4d17 | 10934 | |
7ba99d21 AT |
10935 | auto &file_names = line_header->file_names (); |
10936 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10937 | { |
7ba99d21 | 10938 | file_entry &fe = file_names[i]; |
4c8aa72d | 10939 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10940 | } |
3019eac3 DE |
10941 | } |
10942 | ||
f4dc4d17 DE |
10943 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10944 | so they don't have a "real" (so to speak) symtab anyway. | |
10945 | There is later code that will assign the main symtab to all symbols | |
10946 | that don't have one. We need to handle the case of a symbol with a | |
10947 | missing symtab (DW_AT_decl_file) anyway. */ | |
10948 | } | |
3019eac3 | 10949 | |
f4dc4d17 DE |
10950 | /* Process DW_TAG_type_unit. |
10951 | For TUs we want to skip the first top level sibling if it's not the | |
10952 | actual type being defined by this TU. In this case the first top | |
10953 | level sibling is there to provide context only. */ | |
3019eac3 | 10954 | |
f4dc4d17 DE |
10955 | static void |
10956 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10957 | { | |
10958 | struct die_info *child_die; | |
3019eac3 | 10959 | |
f4dc4d17 DE |
10960 | prepare_one_comp_unit (cu, die, language_minimal); |
10961 | ||
10962 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10963 | We do this before processing child DIEs, so that the line header table | |
10964 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 10965 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
10966 | |
10967 | if (die->child != NULL) | |
10968 | { | |
10969 | child_die = die->child; | |
10970 | while (child_die && child_die->tag) | |
10971 | { | |
10972 | process_die (child_die, cu); | |
10973 | child_die = sibling_die (child_die); | |
10974 | } | |
10975 | } | |
3019eac3 DE |
10976 | } |
10977 | \f | |
80626a55 DE |
10978 | /* DWO/DWP files. |
10979 | ||
10980 | http://gcc.gnu.org/wiki/DebugFission | |
10981 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10982 | ||
10983 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10984 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10985 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10986 | |
10987 | static hashval_t | |
10988 | hash_dwo_file (const void *item) | |
10989 | { | |
9a3c8263 | 10990 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10991 | hashval_t hash; |
3019eac3 | 10992 | |
a2ce51a0 DE |
10993 | hash = htab_hash_string (dwo_file->dwo_name); |
10994 | if (dwo_file->comp_dir != NULL) | |
10995 | hash += htab_hash_string (dwo_file->comp_dir); | |
10996 | return hash; | |
3019eac3 DE |
10997 | } |
10998 | ||
10999 | static int | |
11000 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11001 | { | |
9a3c8263 SM |
11002 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11003 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11004 | |
a2ce51a0 DE |
11005 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11006 | return 0; | |
11007 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11008 | return lhs->comp_dir == rhs->comp_dir; | |
11009 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11010 | } |
11011 | ||
11012 | /* Allocate a hash table for DWO files. */ | |
11013 | ||
51ac9db5 | 11014 | static htab_up |
298e9637 | 11015 | allocate_dwo_file_hash_table () |
3019eac3 | 11016 | { |
51ac9db5 SM |
11017 | auto delete_dwo_file = [] (void *item) |
11018 | { | |
11019 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11020 | ||
11021 | delete dwo_file; | |
11022 | }; | |
11023 | ||
bc68fb19 TT |
11024 | return htab_up (htab_create_alloc (41, |
11025 | hash_dwo_file, | |
11026 | eq_dwo_file, | |
11027 | delete_dwo_file, | |
11028 | xcalloc, xfree)); | |
3019eac3 DE |
11029 | } |
11030 | ||
80626a55 DE |
11031 | /* Lookup DWO file DWO_NAME. */ |
11032 | ||
11033 | static void ** | |
ed2dc618 SM |
11034 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11035 | const char *dwo_name, | |
11036 | const char *comp_dir) | |
80626a55 DE |
11037 | { |
11038 | struct dwo_file find_entry; | |
11039 | void **slot; | |
11040 | ||
11041 | if (dwarf2_per_objfile->dwo_files == NULL) | |
298e9637 | 11042 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); |
80626a55 | 11043 | |
0ac5b59e DE |
11044 | find_entry.dwo_name = dwo_name; |
11045 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11046 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11047 | INSERT); | |
80626a55 DE |
11048 | |
11049 | return slot; | |
11050 | } | |
11051 | ||
3019eac3 DE |
11052 | static hashval_t |
11053 | hash_dwo_unit (const void *item) | |
11054 | { | |
9a3c8263 | 11055 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11056 | |
11057 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11058 | return dwo_unit->signature; | |
11059 | } | |
11060 | ||
11061 | static int | |
11062 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11063 | { | |
9a3c8263 SM |
11064 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11065 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11066 | |
11067 | /* The signature is assumed to be unique within the DWO file. | |
11068 | So while object file CU dwo_id's always have the value zero, | |
11069 | that's OK, assuming each object file DWO file has only one CU, | |
11070 | and that's the rule for now. */ | |
11071 | return lhs->signature == rhs->signature; | |
11072 | } | |
11073 | ||
11074 | /* Allocate a hash table for DWO CUs,TUs. | |
11075 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11076 | ||
b0b6a987 | 11077 | static htab_up |
298e9637 | 11078 | allocate_dwo_unit_table () |
3019eac3 DE |
11079 | { |
11080 | /* Start out with a pretty small number. | |
11081 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
11082 | return htab_up (htab_create_alloc (3, |
11083 | hash_dwo_unit, | |
11084 | eq_dwo_unit, | |
11085 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
11086 | } |
11087 | ||
19c3d4c9 | 11088 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11089 | |
11090 | static void | |
19c3d4c9 DE |
11091 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11092 | const gdb_byte *info_ptr, | |
11093 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
11094 | struct dwo_file *dwo_file, |
11095 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
11096 | { |
11097 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11098 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11099 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 11100 | |
a084a2a6 AT |
11101 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11102 | if (!signature.has_value ()) | |
3019eac3 | 11103 | { |
b98664d3 | 11104 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11105 | " its dwo_id [in module %s]"), |
9d8780f0 | 11106 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11107 | return; |
11108 | } | |
11109 | ||
3019eac3 | 11110 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11111 | dwo_unit->signature = *signature; |
8a0459fd | 11112 | dwo_unit->section = section; |
9c541725 | 11113 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11114 | dwo_unit->length = cu->per_cu->length; |
11115 | ||
b4f54984 | 11116 | if (dwarf_read_debug) |
9d8780f0 SM |
11117 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11118 | sect_offset_str (sect_off), | |
9c541725 | 11119 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11120 | } |
11121 | ||
33c5cd75 | 11122 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11123 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11124 | |
33c5cd75 | 11125 | static void |
ed2dc618 | 11126 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e | 11127 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 11128 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 DE |
11129 | { |
11130 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11131 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11132 | |
96b79293 | 11133 | section.read (objfile); |
33c5cd75 | 11134 | info_ptr = section.buffer; |
3019eac3 DE |
11135 | |
11136 | if (info_ptr == NULL) | |
33c5cd75 | 11137 | return; |
3019eac3 | 11138 | |
b4f54984 | 11139 | if (dwarf_read_debug) |
19c3d4c9 DE |
11140 | { |
11141 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
96b79293 TT |
11142 | section.get_name (), |
11143 | section.get_file_name ()); | |
19c3d4c9 | 11144 | } |
3019eac3 | 11145 | |
33c5cd75 | 11146 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11147 | while (info_ptr < end_ptr) |
11148 | { | |
11149 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 11150 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
11151 | struct dwo_unit *dwo_unit; |
11152 | void **slot; | |
11153 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 DE |
11154 | |
11155 | memset (&per_cu, 0, sizeof (per_cu)); | |
e3b94546 | 11156 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11157 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11158 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11159 | per_cu.section = §ion; | |
11160 | ||
c0ab21c2 TT |
11161 | cutu_reader reader (&per_cu, cu, &dwo_file); |
11162 | if (!reader.dummy_p) | |
11163 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 11164 | &dwo_file, &read_unit); |
33c5cd75 DB |
11165 | info_ptr += per_cu.length; |
11166 | ||
11167 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 11168 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 11169 | continue; |
3019eac3 | 11170 | |
33c5cd75 | 11171 | if (cus_htab == NULL) |
298e9637 | 11172 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 11173 | |
33c5cd75 | 11174 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
c0ab21c2 | 11175 | *dwo_unit = read_unit; |
b0b6a987 | 11176 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
11177 | gdb_assert (slot != NULL); |
11178 | if (*slot != NULL) | |
19c3d4c9 | 11179 | { |
33c5cd75 DB |
11180 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11181 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11182 | |
b98664d3 | 11183 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11184 | " the entry at offset %s, signature %s"), |
11185 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11186 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11187 | } |
33c5cd75 | 11188 | *slot = (void *)dwo_unit; |
3019eac3 | 11189 | } |
3019eac3 DE |
11190 | } |
11191 | ||
80626a55 DE |
11192 | /* DWP file .debug_{cu,tu}_index section format: |
11193 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11194 | ||
d2415c6c DE |
11195 | DWP Version 1: |
11196 | ||
80626a55 DE |
11197 | Both index sections have the same format, and serve to map a 64-bit |
11198 | signature to a set of section numbers. Each section begins with a header, | |
11199 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11200 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11201 | aligned at 8-byte boundaries in the file. | |
11202 | ||
d2415c6c DE |
11203 | The index section header consists of: |
11204 | ||
11205 | V, 32 bit version number | |
11206 | -, 32 bits unused | |
11207 | N, 32 bit number of compilation units or type units in the index | |
11208 | M, 32 bit number of slots in the hash table | |
80626a55 | 11209 | |
d2415c6c | 11210 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11211 | |
d2415c6c DE |
11212 | The hash table begins at offset 16 in the section, and consists of an array |
11213 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11214 | order of the application binary). Unused slots in the hash table are 0. | |
11215 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11216 | |
d2415c6c DE |
11217 | The parallel table begins immediately after the hash table |
11218 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11219 | array of 32-bit indexes (using the byte order of the application binary), | |
11220 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11221 | table contains a 32-bit index into the pool of section numbers. For unused | |
11222 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11223 | |
73869dc2 DE |
11224 | The pool of section numbers begins immediately following the hash table |
11225 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11226 | section numbers consists of an array of 32-bit words (using the byte order | |
11227 | of the application binary). Each item in the array is indexed starting | |
11228 | from 0. The hash table entry provides the index of the first section | |
11229 | number in the set. Additional section numbers in the set follow, and the | |
11230 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
11231 | ||
11232 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
11233 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
11234 | be the second entry. Other members of the set may follow in any order. | |
11235 | ||
11236 | --- | |
11237 | ||
11238 | DWP Version 2: | |
11239 | ||
11240 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
11241 | and the entries in the index tables are now offsets into these sections. | |
11242 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
11243 | section. | |
11244 | ||
11245 | Index Section Contents: | |
11246 | Header | |
11247 | Hash Table of Signatures dwp_hash_table.hash_table | |
11248 | Parallel Table of Indices dwp_hash_table.unit_table | |
11249 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
11250 | Table of Section Sizes dwp_hash_table.v2.sizes | |
11251 | ||
11252 | The index section header consists of: | |
11253 | ||
11254 | V, 32 bit version number | |
11255 | L, 32 bit number of columns in the table of section offsets | |
11256 | N, 32 bit number of compilation units or type units in the index | |
11257 | M, 32 bit number of slots in the hash table | |
11258 | ||
11259 | Numbers are recorded using the byte order of the application binary. | |
11260 | ||
11261 | The hash table has the same format as version 1. | |
11262 | The parallel table of indices has the same format as version 1, | |
11263 | except that the entries are origin-1 indices into the table of sections | |
11264 | offsets and the table of section sizes. | |
11265 | ||
11266 | The table of offsets begins immediately following the parallel table | |
11267 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11268 | a two-dimensional array of 32-bit words (using the byte order of the | |
11269 | application binary), with L columns and N+1 rows, in row-major order. | |
11270 | Each row in the array is indexed starting from 0. The first row provides | |
11271 | a key to the remaining rows: each column in this row provides an identifier | |
11272 | for a debug section, and the offsets in the same column of subsequent rows | |
11273 | refer to that section. The section identifiers are: | |
11274 | ||
11275 | DW_SECT_INFO 1 .debug_info.dwo | |
11276 | DW_SECT_TYPES 2 .debug_types.dwo | |
11277 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11278 | DW_SECT_LINE 4 .debug_line.dwo | |
11279 | DW_SECT_LOC 5 .debug_loc.dwo | |
11280 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11281 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11282 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11283 | ||
11284 | The offsets provided by the CU and TU index sections are the base offsets | |
11285 | for the contributions made by each CU or TU to the corresponding section | |
11286 | in the package file. Each CU and TU header contains an abbrev_offset | |
11287 | field, used to find the abbreviations table for that CU or TU within the | |
11288 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11289 | be interpreted as relative to the base offset given in the index section. | |
11290 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11291 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11292 | and offsets into other debug sections obtained from DWARF attributes should | |
11293 | also be interpreted as relative to the corresponding base offset. | |
11294 | ||
11295 | The table of sizes begins immediately following the table of offsets. | |
11296 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11297 | with L columns and N rows, in row-major order. Each row in the array is | |
11298 | indexed starting from 1 (row 0 is shared by the two tables). | |
11299 | ||
11300 | --- | |
11301 | ||
11302 | Hash table lookup is handled the same in version 1 and 2: | |
11303 | ||
11304 | We assume that N and M will not exceed 2^32 - 1. | |
11305 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11306 | ||
d2415c6c DE |
11307 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11308 | in the hash table is located as follows: | |
80626a55 | 11309 | |
d2415c6c DE |
11310 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11311 | the low-order k bits all set to 1. | |
80626a55 | 11312 | |
d2415c6c | 11313 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11314 | |
d2415c6c DE |
11315 | 3) If the hash table entry at index H matches the signature, use that |
11316 | entry. If the hash table entry at index H is unused (all zeroes), | |
11317 | terminate the search: the signature is not present in the table. | |
80626a55 | 11318 | |
d2415c6c | 11319 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11320 | |
d2415c6c | 11321 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11322 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11323 | |
11324 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11325 | .debug_{info,types}.dwo in DWP_FILE. | |
11326 | Returns NULL if there isn't one. | |
11327 | Note: This function processes DWP files only, not DWO files. */ | |
11328 | ||
11329 | static struct dwp_hash_table * | |
ed2dc618 SM |
11330 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11331 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
11332 | { |
11333 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 11334 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11335 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11336 | struct dwarf2_section_info *index; |
73869dc2 | 11337 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11338 | struct dwp_hash_table *htab; |
11339 | ||
11340 | if (is_debug_types) | |
11341 | index = &dwp_file->sections.tu_index; | |
11342 | else | |
11343 | index = &dwp_file->sections.cu_index; | |
11344 | ||
96b79293 | 11345 | if (index->empty ()) |
80626a55 | 11346 | return NULL; |
96b79293 | 11347 | index->read (objfile); |
80626a55 DE |
11348 | |
11349 | index_ptr = index->buffer; | |
11350 | index_end = index_ptr + index->size; | |
11351 | ||
11352 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
11353 | index_ptr += 4; |
11354 | if (version == 2) | |
11355 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
11356 | else | |
11357 | nr_columns = 0; | |
11358 | index_ptr += 4; | |
80626a55 DE |
11359 | nr_units = read_4_bytes (dbfd, index_ptr); |
11360 | index_ptr += 4; | |
11361 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11362 | index_ptr += 4; | |
11363 | ||
73869dc2 | 11364 | if (version != 1 && version != 2) |
80626a55 | 11365 | { |
21aa081e | 11366 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11367 | " [in module %s]"), |
21aa081e | 11368 | pulongest (version), dwp_file->name); |
80626a55 DE |
11369 | } |
11370 | if (nr_slots != (nr_slots & -nr_slots)) | |
11371 | { | |
21aa081e | 11372 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11373 | " is not power of 2 [in module %s]"), |
21aa081e | 11374 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11375 | } |
11376 | ||
11377 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
11378 | htab->version = version; |
11379 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11380 | htab->nr_units = nr_units; |
11381 | htab->nr_slots = nr_slots; | |
11382 | htab->hash_table = index_ptr; | |
11383 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11384 | |
11385 | /* Exit early if the table is empty. */ | |
11386 | if (nr_slots == 0 || nr_units == 0 | |
11387 | || (version == 2 && nr_columns == 0)) | |
11388 | { | |
11389 | /* All must be zero. */ | |
11390 | if (nr_slots != 0 || nr_units != 0 | |
11391 | || (version == 2 && nr_columns != 0)) | |
11392 | { | |
b98664d3 | 11393 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11394 | " all zero [in modules %s]"), |
11395 | dwp_file->name); | |
11396 | } | |
11397 | return htab; | |
11398 | } | |
11399 | ||
11400 | if (version == 1) | |
11401 | { | |
11402 | htab->section_pool.v1.indices = | |
11403 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11404 | /* It's harder to decide whether the section is too small in v1. | |
11405 | V1 is deprecated anyway so we punt. */ | |
11406 | } | |
11407 | else | |
11408 | { | |
11409 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11410 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11411 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11412 | /* Reverse map for error checking. */ |
11413 | int ids_seen[DW_SECT_MAX + 1]; | |
11414 | int i; | |
11415 | ||
11416 | if (nr_columns < 2) | |
11417 | { | |
11418 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11419 | " in section table [in module %s]"), | |
11420 | dwp_file->name); | |
11421 | } | |
11422 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11423 | { | |
11424 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11425 | " in section table [in module %s]"), | |
11426 | dwp_file->name); | |
11427 | } | |
04fd5eed GB |
11428 | memset (ids, 255, sizeof_ids); |
11429 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11430 | for (i = 0; i < nr_columns; ++i) |
11431 | { | |
11432 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11433 | ||
11434 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11435 | { | |
11436 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11437 | " in section table [in module %s]"), | |
11438 | id, dwp_file->name); | |
11439 | } | |
11440 | if (ids_seen[id] != -1) | |
11441 | { | |
11442 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11443 | " id %d in section table [in module %s]"), | |
11444 | id, dwp_file->name); | |
11445 | } | |
11446 | ids_seen[id] = i; | |
11447 | ids[i] = id; | |
11448 | } | |
11449 | /* Must have exactly one info or types section. */ | |
11450 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11451 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11452 | != 1) | |
11453 | { | |
11454 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11455 | " DWO info/types section [in module %s]"), | |
11456 | dwp_file->name); | |
11457 | } | |
11458 | /* Must have an abbrev section. */ | |
11459 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11460 | { | |
11461 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11462 | " section [in module %s]"), | |
11463 | dwp_file->name); | |
11464 | } | |
11465 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11466 | htab->section_pool.v2.sizes = | |
11467 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11468 | * nr_units * nr_columns); | |
11469 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11470 | * nr_units * nr_columns)) | |
11471 | > index_end) | |
11472 | { | |
11473 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11474 | " [in module %s]"), | |
11475 | dwp_file->name); | |
11476 | } | |
11477 | } | |
80626a55 DE |
11478 | |
11479 | return htab; | |
11480 | } | |
11481 | ||
11482 | /* Update SECTIONS with the data from SECTP. | |
11483 | ||
11484 | This function is like the other "locate" section routines that are | |
11485 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11486 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11487 | |
11488 | The result is non-zero for success, or zero if an error was found. */ | |
11489 | ||
11490 | static int | |
73869dc2 DE |
11491 | locate_v1_virtual_dwo_sections (asection *sectp, |
11492 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11493 | { |
11494 | const struct dwop_section_names *names = &dwop_section_names; | |
11495 | ||
11496 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11497 | { | |
11498 | /* There can be only one. */ | |
049412e3 | 11499 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11500 | return 0; |
049412e3 | 11501 | sections->abbrev.s.section = sectp; |
fd361982 | 11502 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
11503 | } |
11504 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11505 | || section_is_p (sectp->name, &names->types_dwo)) | |
11506 | { | |
11507 | /* There can be only one. */ | |
049412e3 | 11508 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11509 | return 0; |
049412e3 | 11510 | sections->info_or_types.s.section = sectp; |
fd361982 | 11511 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
11512 | } |
11513 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11514 | { | |
11515 | /* There can be only one. */ | |
049412e3 | 11516 | if (sections->line.s.section != NULL) |
80626a55 | 11517 | return 0; |
049412e3 | 11518 | sections->line.s.section = sectp; |
fd361982 | 11519 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
11520 | } |
11521 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11522 | { | |
11523 | /* There can be only one. */ | |
049412e3 | 11524 | if (sections->loc.s.section != NULL) |
80626a55 | 11525 | return 0; |
049412e3 | 11526 | sections->loc.s.section = sectp; |
fd361982 | 11527 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
11528 | } |
11529 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11530 | { | |
11531 | /* There can be only one. */ | |
049412e3 | 11532 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11533 | return 0; |
049412e3 | 11534 | sections->macinfo.s.section = sectp; |
fd361982 | 11535 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
11536 | } |
11537 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11538 | { | |
11539 | /* There can be only one. */ | |
049412e3 | 11540 | if (sections->macro.s.section != NULL) |
80626a55 | 11541 | return 0; |
049412e3 | 11542 | sections->macro.s.section = sectp; |
fd361982 | 11543 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
11544 | } |
11545 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11546 | { | |
11547 | /* There can be only one. */ | |
049412e3 | 11548 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11549 | return 0; |
049412e3 | 11550 | sections->str_offsets.s.section = sectp; |
fd361982 | 11551 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11552 | } |
11553 | else | |
11554 | { | |
11555 | /* No other kind of section is valid. */ | |
11556 | return 0; | |
11557 | } | |
11558 | ||
11559 | return 1; | |
11560 | } | |
11561 | ||
73869dc2 DE |
11562 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11563 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11564 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11565 | This is for DWP version 1 files. */ | |
80626a55 DE |
11566 | |
11567 | static struct dwo_unit * | |
ed2dc618 SM |
11568 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11569 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11570 | uint32_t unit_index, |
11571 | const char *comp_dir, | |
11572 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11573 | { |
11574 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11575 | const struct dwp_hash_table *dwp_htab = |
11576 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11577 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11578 | const char *kind = is_debug_types ? "TU" : "CU"; |
11579 | struct dwo_file *dwo_file; | |
11580 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11581 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11582 | void **dwo_file_slot; |
80626a55 DE |
11583 | int i; |
11584 | ||
73869dc2 DE |
11585 | gdb_assert (dwp_file->version == 1); |
11586 | ||
b4f54984 | 11587 | if (dwarf_read_debug) |
80626a55 | 11588 | { |
73869dc2 | 11589 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11590 | kind, |
73869dc2 | 11591 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11592 | dwp_file->name); |
11593 | } | |
11594 | ||
19ac8c2e | 11595 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11596 | Put a limit on the number of sections we look for so that bad data |
11597 | doesn't cause us to loop forever. */ | |
11598 | ||
73869dc2 | 11599 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11600 | (1 /* .debug_info or .debug_types */ \ |
11601 | + 1 /* .debug_abbrev */ \ | |
11602 | + 1 /* .debug_line */ \ | |
11603 | + 1 /* .debug_loc */ \ | |
11604 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11605 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11606 | + 1 /* trailing zero */) |
11607 | ||
11608 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11609 | |
73869dc2 | 11610 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11611 | { |
11612 | asection *sectp; | |
11613 | uint32_t section_nr = | |
11614 | read_4_bytes (dbfd, | |
73869dc2 DE |
11615 | dwp_htab->section_pool.v1.indices |
11616 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11617 | |
11618 | if (section_nr == 0) | |
11619 | break; | |
11620 | if (section_nr >= dwp_file->num_sections) | |
11621 | { | |
11622 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11623 | " [in module %s]"), | |
11624 | dwp_file->name); | |
11625 | } | |
11626 | ||
11627 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11628 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11629 | { |
11630 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11631 | " [in module %s]"), | |
11632 | dwp_file->name); | |
11633 | } | |
11634 | } | |
11635 | ||
11636 | if (i < 2 | |
96b79293 TT |
11637 | || sections.info_or_types.empty () |
11638 | || sections.abbrev.empty ()) | |
80626a55 DE |
11639 | { |
11640 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11641 | " [in module %s]"), | |
11642 | dwp_file->name); | |
11643 | } | |
73869dc2 | 11644 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11645 | { |
11646 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11647 | " [in module %s]"), | |
11648 | dwp_file->name); | |
11649 | } | |
11650 | ||
11651 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11652 | have dwo_unit "live" in that. At least for now. | |
11653 | ||
11654 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11655 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11656 | file, we can combine them back into a virtual DWO file to save space |
11657 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11658 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11659 | ||
791afaa2 TT |
11660 | std::string virtual_dwo_name = |
11661 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11662 | sections.abbrev.get_id (), |
11663 | sections.line.get_id (), | |
11664 | sections.loc.get_id (), | |
11665 | sections.str_offsets.get_id ()); | |
80626a55 | 11666 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11667 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11668 | virtual_dwo_name.c_str (), | |
11669 | comp_dir); | |
80626a55 DE |
11670 | /* Create one if necessary. */ |
11671 | if (*dwo_file_slot == NULL) | |
11672 | { | |
b4f54984 | 11673 | if (dwarf_read_debug) |
80626a55 DE |
11674 | { |
11675 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11676 | virtual_dwo_name.c_str ()); |
80626a55 | 11677 | } |
51ac9db5 | 11678 | dwo_file = new struct dwo_file; |
be1e3d3e | 11679 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
0ac5b59e | 11680 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11681 | dwo_file->sections.abbrev = sections.abbrev; |
11682 | dwo_file->sections.line = sections.line; | |
11683 | dwo_file->sections.loc = sections.loc; | |
11684 | dwo_file->sections.macinfo = sections.macinfo; | |
11685 | dwo_file->sections.macro = sections.macro; | |
11686 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11687 | /* The "str" section is global to the entire DWP file. */ | |
11688 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11689 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11690 | there's no need to record it in dwo_file. |
11691 | Also, we can't simply record type sections in dwo_file because | |
11692 | we record a pointer into the vector in dwo_unit. As we collect more | |
11693 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11694 | for it, invalidating all copies of pointers into the previous |
11695 | contents. */ | |
80626a55 DE |
11696 | *dwo_file_slot = dwo_file; |
11697 | } | |
11698 | else | |
11699 | { | |
b4f54984 | 11700 | if (dwarf_read_debug) |
80626a55 DE |
11701 | { |
11702 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11703 | virtual_dwo_name.c_str ()); |
80626a55 | 11704 | } |
9a3c8263 | 11705 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11706 | } |
80626a55 DE |
11707 | |
11708 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11709 | dwo_unit->dwo_file = dwo_file; | |
11710 | dwo_unit->signature = signature; | |
8d749320 SM |
11711 | dwo_unit->section = |
11712 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11713 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11714 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11715 | |
11716 | return dwo_unit; | |
11717 | } | |
11718 | ||
73869dc2 DE |
11719 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11720 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11721 | piece within that section used by a TU/CU, return a virtual section | |
11722 | of just that piece. */ | |
11723 | ||
11724 | static struct dwarf2_section_info | |
ed2dc618 SM |
11725 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11726 | struct dwarf2_section_info *section, | |
73869dc2 DE |
11727 | bfd_size_type offset, bfd_size_type size) |
11728 | { | |
11729 | struct dwarf2_section_info result; | |
11730 | asection *sectp; | |
11731 | ||
11732 | gdb_assert (section != NULL); | |
11733 | gdb_assert (!section->is_virtual); | |
11734 | ||
11735 | memset (&result, 0, sizeof (result)); | |
11736 | result.s.containing_section = section; | |
dc4ccb6f | 11737 | result.is_virtual = true; |
73869dc2 DE |
11738 | |
11739 | if (size == 0) | |
11740 | return result; | |
11741 | ||
96b79293 | 11742 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11743 | |
11744 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11745 | bounds of the real section. This is a pretty-rare event, so just | |
11746 | flag an error (easier) instead of a warning and trying to cope. */ | |
11747 | if (sectp == NULL | |
fd361982 | 11748 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11749 | { |
73869dc2 DE |
11750 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
11751 | " in section %s [in module %s]"), | |
fd361982 | 11752 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
11753 | objfile_name (dwarf2_per_objfile->objfile)); |
11754 | } | |
11755 | ||
11756 | result.virtual_offset = offset; | |
11757 | result.size = size; | |
11758 | return result; | |
11759 | } | |
11760 | ||
11761 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11762 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11763 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11764 | This is for DWP version 2 files. */ | |
11765 | ||
11766 | static struct dwo_unit * | |
ed2dc618 SM |
11767 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11768 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11769 | uint32_t unit_index, |
11770 | const char *comp_dir, | |
11771 | ULONGEST signature, int is_debug_types) | |
11772 | { | |
11773 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11774 | const struct dwp_hash_table *dwp_htab = | |
11775 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11776 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11777 | const char *kind = is_debug_types ? "TU" : "CU"; |
11778 | struct dwo_file *dwo_file; | |
11779 | struct dwo_unit *dwo_unit; | |
11780 | struct virtual_v2_dwo_sections sections; | |
11781 | void **dwo_file_slot; | |
73869dc2 DE |
11782 | int i; |
11783 | ||
11784 | gdb_assert (dwp_file->version == 2); | |
11785 | ||
b4f54984 | 11786 | if (dwarf_read_debug) |
73869dc2 DE |
11787 | { |
11788 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11789 | kind, | |
11790 | pulongest (unit_index), hex_string (signature), | |
11791 | dwp_file->name); | |
11792 | } | |
11793 | ||
11794 | /* Fetch the section offsets of this DWO unit. */ | |
11795 | ||
11796 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11797 | |
11798 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11799 | { | |
11800 | uint32_t offset = read_4_bytes (dbfd, | |
11801 | dwp_htab->section_pool.v2.offsets | |
11802 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11803 | + i) | |
11804 | * sizeof (uint32_t))); | |
11805 | uint32_t size = read_4_bytes (dbfd, | |
11806 | dwp_htab->section_pool.v2.sizes | |
11807 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11808 | + i) | |
11809 | * sizeof (uint32_t))); | |
11810 | ||
11811 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11812 | { | |
11813 | case DW_SECT_INFO: | |
11814 | case DW_SECT_TYPES: | |
11815 | sections.info_or_types_offset = offset; | |
11816 | sections.info_or_types_size = size; | |
11817 | break; | |
11818 | case DW_SECT_ABBREV: | |
11819 | sections.abbrev_offset = offset; | |
11820 | sections.abbrev_size = size; | |
11821 | break; | |
11822 | case DW_SECT_LINE: | |
11823 | sections.line_offset = offset; | |
11824 | sections.line_size = size; | |
11825 | break; | |
11826 | case DW_SECT_LOC: | |
11827 | sections.loc_offset = offset; | |
11828 | sections.loc_size = size; | |
11829 | break; | |
11830 | case DW_SECT_STR_OFFSETS: | |
11831 | sections.str_offsets_offset = offset; | |
11832 | sections.str_offsets_size = size; | |
11833 | break; | |
11834 | case DW_SECT_MACINFO: | |
11835 | sections.macinfo_offset = offset; | |
11836 | sections.macinfo_size = size; | |
11837 | break; | |
11838 | case DW_SECT_MACRO: | |
11839 | sections.macro_offset = offset; | |
11840 | sections.macro_size = size; | |
11841 | break; | |
11842 | } | |
11843 | } | |
11844 | ||
11845 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11846 | have dwo_unit "live" in that. At least for now. | |
11847 | ||
11848 | The DWP file can be made up of a random collection of CUs and TUs. | |
11849 | However, for each CU + set of TUs that came from the same original DWO | |
11850 | file, we can combine them back into a virtual DWO file to save space | |
11851 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11852 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11853 | ||
791afaa2 TT |
11854 | std::string virtual_dwo_name = |
11855 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11856 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11857 | (long) (sections.line_size ? sections.line_offset : 0), | |
11858 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11859 | (long) (sections.str_offsets_size | |
11860 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11861 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11862 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11863 | virtual_dwo_name.c_str (), | |
11864 | comp_dir); | |
73869dc2 DE |
11865 | /* Create one if necessary. */ |
11866 | if (*dwo_file_slot == NULL) | |
11867 | { | |
b4f54984 | 11868 | if (dwarf_read_debug) |
73869dc2 DE |
11869 | { |
11870 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11871 | virtual_dwo_name.c_str ()); |
73869dc2 | 11872 | } |
51ac9db5 | 11873 | dwo_file = new struct dwo_file; |
be1e3d3e | 11874 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
73869dc2 DE |
11875 | dwo_file->comp_dir = comp_dir; |
11876 | dwo_file->sections.abbrev = | |
ed2dc618 | 11877 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
11878 | sections.abbrev_offset, sections.abbrev_size); |
11879 | dwo_file->sections.line = | |
ed2dc618 | 11880 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
11881 | sections.line_offset, sections.line_size); |
11882 | dwo_file->sections.loc = | |
ed2dc618 | 11883 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
11884 | sections.loc_offset, sections.loc_size); |
11885 | dwo_file->sections.macinfo = | |
ed2dc618 | 11886 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
11887 | sections.macinfo_offset, sections.macinfo_size); |
11888 | dwo_file->sections.macro = | |
ed2dc618 | 11889 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
11890 | sections.macro_offset, sections.macro_size); |
11891 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
11892 | create_dwp_v2_section (dwarf2_per_objfile, |
11893 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
11894 | sections.str_offsets_offset, |
11895 | sections.str_offsets_size); | |
11896 | /* The "str" section is global to the entire DWP file. */ | |
11897 | dwo_file->sections.str = dwp_file->sections.str; | |
11898 | /* The info or types section is assigned below to dwo_unit, | |
11899 | there's no need to record it in dwo_file. | |
11900 | Also, we can't simply record type sections in dwo_file because | |
11901 | we record a pointer into the vector in dwo_unit. As we collect more | |
11902 | types we'll grow the vector and eventually have to reallocate space | |
11903 | for it, invalidating all copies of pointers into the previous | |
11904 | contents. */ | |
11905 | *dwo_file_slot = dwo_file; | |
11906 | } | |
11907 | else | |
11908 | { | |
b4f54984 | 11909 | if (dwarf_read_debug) |
73869dc2 DE |
11910 | { |
11911 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11912 | virtual_dwo_name.c_str ()); |
73869dc2 | 11913 | } |
9a3c8263 | 11914 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11915 | } |
73869dc2 DE |
11916 | |
11917 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11918 | dwo_unit->dwo_file = dwo_file; | |
11919 | dwo_unit->signature = signature; | |
8d749320 SM |
11920 | dwo_unit->section = |
11921 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
11922 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
11923 | is_debug_types | |
73869dc2 DE |
11924 | ? &dwp_file->sections.types |
11925 | : &dwp_file->sections.info, | |
11926 | sections.info_or_types_offset, | |
11927 | sections.info_or_types_size); | |
11928 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11929 | ||
11930 | return dwo_unit; | |
11931 | } | |
11932 | ||
57d63ce2 DE |
11933 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11934 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11935 | |
11936 | static struct dwo_unit * | |
ed2dc618 SM |
11937 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11938 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 11939 | ULONGEST signature, int is_debug_types) |
80626a55 | 11940 | { |
57d63ce2 DE |
11941 | const struct dwp_hash_table *dwp_htab = |
11942 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11943 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 11944 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11945 | uint32_t hash = signature & mask; |
11946 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11947 | unsigned int i; | |
11948 | void **slot; | |
870f88f7 | 11949 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11950 | |
11951 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11952 | find_dwo_cu.signature = signature; | |
19ac8c2e | 11953 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
11954 | ? dwp_file->loaded_tus.get () |
11955 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 11956 | &find_dwo_cu, INSERT); |
80626a55 DE |
11957 | |
11958 | if (*slot != NULL) | |
9a3c8263 | 11959 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11960 | |
11961 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11962 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11963 | { |
11964 | ULONGEST signature_in_table; | |
11965 | ||
11966 | signature_in_table = | |
57d63ce2 | 11967 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11968 | if (signature_in_table == signature) |
11969 | { | |
57d63ce2 DE |
11970 | uint32_t unit_index = |
11971 | read_4_bytes (dbfd, | |
11972 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11973 | |
73869dc2 DE |
11974 | if (dwp_file->version == 1) |
11975 | { | |
ed2dc618 SM |
11976 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
11977 | dwp_file, unit_index, | |
73869dc2 DE |
11978 | comp_dir, signature, |
11979 | is_debug_types); | |
11980 | } | |
11981 | else | |
11982 | { | |
ed2dc618 SM |
11983 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
11984 | dwp_file, unit_index, | |
73869dc2 DE |
11985 | comp_dir, signature, |
11986 | is_debug_types); | |
11987 | } | |
9a3c8263 | 11988 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11989 | } |
11990 | if (signature_in_table == 0) | |
11991 | return NULL; | |
11992 | hash = (hash + hash2) & mask; | |
11993 | } | |
11994 | ||
11995 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11996 | " [in module %s]"), | |
11997 | dwp_file->name); | |
11998 | } | |
11999 | ||
ab5088bf | 12000 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12001 | Open the file specified by FILE_NAME and hand it off to BFD for |
12002 | preliminary analysis. Return a newly initialized bfd *, which | |
12003 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12004 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12005 | SEARCH_CWD is true if the current directory is to be searched. |
12006 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12007 | If successful, the file is added to the bfd include table of the |
12008 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12009 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12010 | NOTE: This function is derived from symfile_bfd_open. */ |
12011 | ||
192b62ce | 12012 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12013 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12014 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12015 | { |
24b9144d | 12016 | int desc; |
9c02c129 DE |
12017 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12018 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12019 | to debug_file_directory. */ | |
e0cc99a6 | 12020 | const char *search_path; |
9c02c129 DE |
12021 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12022 | ||
e0cc99a6 | 12023 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12024 | if (search_cwd) |
12025 | { | |
12026 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12027 | { |
12028 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12029 | debug_file_directory, | |
12030 | (char *) NULL)); | |
12031 | search_path = search_path_holder.get (); | |
12032 | } | |
6ac97d4c | 12033 | else |
e0cc99a6 | 12034 | search_path = "."; |
6ac97d4c | 12035 | } |
9c02c129 | 12036 | else |
e0cc99a6 | 12037 | search_path = debug_file_directory; |
3019eac3 | 12038 | |
24b9144d | 12039 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12040 | if (is_dwp) |
12041 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12042 | |
12043 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12044 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12045 | O_RDONLY | O_BINARY, &absolute_name); |
12046 | if (desc < 0) | |
12047 | return NULL; | |
12048 | ||
e0cc99a6 TT |
12049 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12050 | gnutarget, desc)); | |
9c02c129 DE |
12051 | if (sym_bfd == NULL) |
12052 | return NULL; | |
192b62ce | 12053 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12054 | |
192b62ce TT |
12055 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12056 | return NULL; | |
3019eac3 | 12057 | |
13aaf454 DE |
12058 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12059 | This is important because things like demangled_names_hash lives in the | |
12060 | objfile's per_bfd space and may have references to things like symbol | |
12061 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12062 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12063 | |
3019eac3 DE |
12064 | return sym_bfd; |
12065 | } | |
12066 | ||
ab5088bf | 12067 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12068 | COMP_DIR is the DW_AT_comp_dir attribute. |
12069 | The result is the bfd handle of the file. | |
12070 | If there is a problem finding or opening the file, return NULL. | |
12071 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12072 | same as symfile_bfd_open. */ | |
12073 | ||
192b62ce | 12074 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12075 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12076 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12077 | { |
80626a55 | 12078 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12079 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12080 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12081 | |
12082 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12083 | ||
12084 | if (comp_dir != NULL) | |
12085 | { | |
43816ebc TT |
12086 | gdb::unique_xmalloc_ptr<char> path_to_try |
12087 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12088 | |
12089 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12090 | search path, which seems useful. */ | |
ed2dc618 | 12091 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
43816ebc | 12092 | path_to_try.get (), |
ed2dc618 | 12093 | 0 /*is_dwp*/, |
192b62ce | 12094 | 1 /*search_cwd*/)); |
3019eac3 DE |
12095 | if (abfd != NULL) |
12096 | return abfd; | |
12097 | } | |
12098 | ||
12099 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12100 | is a list of paths. */ | |
12101 | ||
12102 | if (*debug_file_directory == '\0') | |
12103 | return NULL; | |
12104 | ||
ed2dc618 SM |
12105 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12106 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12107 | } |
12108 | ||
80626a55 DE |
12109 | /* This function is mapped across the sections and remembers the offset and |
12110 | size of each of the DWO debugging sections we are interested in. */ | |
12111 | ||
12112 | static void | |
12113 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12114 | { | |
9a3c8263 | 12115 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12116 | const struct dwop_section_names *names = &dwop_section_names; |
12117 | ||
12118 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12119 | { | |
049412e3 | 12120 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12121 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12122 | } |
12123 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12124 | { | |
049412e3 | 12125 | dwo_sections->info.s.section = sectp; |
fd361982 | 12126 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12127 | } |
12128 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12129 | { | |
049412e3 | 12130 | dwo_sections->line.s.section = sectp; |
fd361982 | 12131 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12132 | } |
12133 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12134 | { | |
049412e3 | 12135 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12136 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12137 | } |
12138 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12139 | { | |
049412e3 | 12140 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12141 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12142 | } |
12143 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12144 | { | |
049412e3 | 12145 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12146 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12147 | } |
12148 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12149 | { | |
049412e3 | 12150 | dwo_sections->str.s.section = sectp; |
fd361982 | 12151 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
12152 | } |
12153 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12154 | { | |
049412e3 | 12155 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12156 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12157 | } |
12158 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12159 | { | |
12160 | struct dwarf2_section_info type_section; | |
12161 | ||
12162 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12163 | type_section.s.section = sectp; |
fd361982 | 12164 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12165 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12166 | } |
12167 | } | |
12168 | ||
ab5088bf | 12169 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12170 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12171 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12172 | |
12173 | static struct dwo_file * | |
0ac5b59e DE |
12174 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12175 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12176 | { |
ed2dc618 | 12177 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12178 | |
fb1eb2f9 | 12179 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12180 | if (dbfd == NULL) |
12181 | { | |
b4f54984 | 12182 | if (dwarf_read_debug) |
80626a55 DE |
12183 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12184 | return NULL; | |
12185 | } | |
263db9a1 | 12186 | |
51ac9db5 | 12187 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12188 | dwo_file->dwo_name = dwo_name; |
12189 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12190 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12191 | |
fb1eb2f9 | 12192 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 12193 | &dwo_file->sections); |
3019eac3 | 12194 | |
18a8505e AT |
12195 | create_cus_hash_table (dwarf2_per_objfile, per_cu->cu, *dwo_file, |
12196 | dwo_file->sections.info, dwo_file->cus); | |
3019eac3 | 12197 | |
263db9a1 | 12198 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12199 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12200 | |
b4f54984 | 12201 | if (dwarf_read_debug) |
80626a55 DE |
12202 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12203 | ||
263db9a1 | 12204 | return dwo_file.release (); |
3019eac3 DE |
12205 | } |
12206 | ||
80626a55 | 12207 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12208 | size of each of the DWP debugging sections common to version 1 and 2 that |
12209 | we are interested in. */ | |
3019eac3 | 12210 | |
80626a55 | 12211 | static void |
73869dc2 DE |
12212 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12213 | void *dwp_file_ptr) | |
3019eac3 | 12214 | { |
9a3c8263 | 12215 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12216 | const struct dwop_section_names *names = &dwop_section_names; |
12217 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12218 | |
80626a55 | 12219 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12220 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12221 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12222 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12223 | |
80626a55 DE |
12224 | /* Look for specific sections that we need. */ |
12225 | if (section_is_p (sectp->name, &names->str_dwo)) | |
12226 | { | |
049412e3 | 12227 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12228 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
12229 | } |
12230 | else if (section_is_p (sectp->name, &names->cu_index)) | |
12231 | { | |
049412e3 | 12232 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12233 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12234 | } |
12235 | else if (section_is_p (sectp->name, &names->tu_index)) | |
12236 | { | |
049412e3 | 12237 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12238 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12239 | } |
12240 | } | |
3019eac3 | 12241 | |
73869dc2 DE |
12242 | /* This function is mapped across the sections and remembers the offset and |
12243 | size of each of the DWP version 2 debugging sections that we are interested | |
12244 | in. This is split into a separate function because we don't know if we | |
12245 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
12246 | ||
12247 | static void | |
12248 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12249 | { | |
9a3c8263 | 12250 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12251 | const struct dwop_section_names *names = &dwop_section_names; |
12252 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12253 | ||
12254 | /* Record the ELF section number for later lookup: this is what the | |
12255 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12256 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12257 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12258 | ||
12259 | /* Look for specific sections that we need. */ | |
12260 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12261 | { | |
049412e3 | 12262 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12263 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
12264 | } |
12265 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12266 | { | |
049412e3 | 12267 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12268 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
12269 | } |
12270 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12271 | { | |
049412e3 | 12272 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12273 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
12274 | } |
12275 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12276 | { | |
049412e3 | 12277 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12278 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
12279 | } |
12280 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12281 | { | |
049412e3 | 12282 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12283 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
12284 | } |
12285 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12286 | { | |
049412e3 | 12287 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12288 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
12289 | } |
12290 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12291 | { | |
049412e3 | 12292 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12293 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
12294 | } |
12295 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12296 | { | |
049412e3 | 12297 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12298 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12299 | } |
12300 | } | |
12301 | ||
80626a55 | 12302 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12303 | |
80626a55 DE |
12304 | static hashval_t |
12305 | hash_dwp_loaded_cutus (const void *item) | |
12306 | { | |
9a3c8263 | 12307 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12308 | |
80626a55 DE |
12309 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12310 | return dwo_unit->signature; | |
3019eac3 DE |
12311 | } |
12312 | ||
80626a55 | 12313 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12314 | |
80626a55 DE |
12315 | static int |
12316 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12317 | { |
9a3c8263 SM |
12318 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12319 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12320 | |
80626a55 DE |
12321 | return dua->signature == dub->signature; |
12322 | } | |
3019eac3 | 12323 | |
80626a55 | 12324 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12325 | |
48b490f2 | 12326 | static htab_up |
298e9637 | 12327 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12328 | { |
48b490f2 TT |
12329 | return htab_up (htab_create_alloc (3, |
12330 | hash_dwp_loaded_cutus, | |
12331 | eq_dwp_loaded_cutus, | |
12332 | NULL, xcalloc, xfree)); | |
80626a55 | 12333 | } |
3019eac3 | 12334 | |
ab5088bf DE |
12335 | /* Try to open DWP file FILE_NAME. |
12336 | The result is the bfd handle of the file. | |
12337 | If there is a problem finding or opening the file, return NULL. | |
12338 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12339 | same as symfile_bfd_open. */ | |
12340 | ||
192b62ce | 12341 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12342 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12343 | const char *file_name) | |
ab5088bf | 12344 | { |
ed2dc618 SM |
12345 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
12346 | 1 /*is_dwp*/, | |
192b62ce | 12347 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12348 | if (abfd != NULL) |
12349 | return abfd; | |
12350 | ||
12351 | /* Work around upstream bug 15652. | |
12352 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12353 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12354 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12355 | of the executable's path may have discarded the needed info. | |
12356 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12357 | .gnu_debuglink, but that doesn't exist yet.] | |
12358 | Strip the directory from FILE_NAME and search again. */ | |
12359 | if (*debug_file_directory != '\0') | |
12360 | { | |
12361 | /* Don't implicitly search the current directory here. | |
12362 | If the user wants to search "." to handle this case, | |
12363 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
12364 | return try_open_dwop_file (dwarf2_per_objfile, |
12365 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
12366 | 0 /*search_cwd*/); |
12367 | } | |
12368 | ||
12369 | return NULL; | |
ab5088bf DE |
12370 | } |
12371 | ||
80626a55 DE |
12372 | /* Initialize the use of the DWP file for the current objfile. |
12373 | By convention the name of the DWP file is ${objfile}.dwp. | |
12374 | The result is NULL if it can't be found. */ | |
a766d390 | 12375 | |
400174b1 | 12376 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 12377 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
12378 | { |
12379 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 12380 | |
82bf32bc JK |
12381 | /* Try to find first .dwp for the binary file before any symbolic links |
12382 | resolving. */ | |
6c447423 DE |
12383 | |
12384 | /* If the objfile is a debug file, find the name of the real binary | |
12385 | file and get the name of dwp file from there. */ | |
d721ba37 | 12386 | std::string dwp_name; |
6c447423 DE |
12387 | if (objfile->separate_debug_objfile_backlink != NULL) |
12388 | { | |
12389 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12390 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12391 | |
d721ba37 | 12392 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12393 | } |
12394 | else | |
d721ba37 PA |
12395 | dwp_name = objfile->original_name; |
12396 | ||
12397 | dwp_name += ".dwp"; | |
80626a55 | 12398 | |
ed2dc618 | 12399 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12400 | if (dbfd == NULL |
12401 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12402 | { | |
12403 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12404 | dwp_name = objfile_name (objfile); |
12405 | dwp_name += ".dwp"; | |
ed2dc618 | 12406 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12407 | } |
12408 | ||
80626a55 DE |
12409 | if (dbfd == NULL) |
12410 | { | |
b4f54984 | 12411 | if (dwarf_read_debug) |
d721ba37 | 12412 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 12413 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12414 | } |
400174b1 TT |
12415 | |
12416 | const char *name = bfd_get_filename (dbfd.get ()); | |
12417 | std::unique_ptr<struct dwp_file> dwp_file | |
12418 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12419 | |
0a0f4c01 | 12420 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
12421 | dwp_file->elf_sections = |
12422 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12423 | dwp_file->num_sections, asection *); | |
12424 | ||
400174b1 TT |
12425 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12426 | dwarf2_locate_common_dwp_sections, | |
12427 | dwp_file.get ()); | |
80626a55 | 12428 | |
400174b1 TT |
12429 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12430 | 0); | |
80626a55 | 12431 | |
400174b1 TT |
12432 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12433 | 1); | |
80626a55 | 12434 | |
73869dc2 | 12435 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12436 | if (dwp_file->cus && dwp_file->tus |
12437 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12438 | { |
12439 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12440 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12441 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12442 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12443 | " TU version %s [in DWP file %s]"), | |
12444 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12445 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12446 | } |
08302ed2 DE |
12447 | |
12448 | if (dwp_file->cus) | |
12449 | dwp_file->version = dwp_file->cus->version; | |
12450 | else if (dwp_file->tus) | |
12451 | dwp_file->version = dwp_file->tus->version; | |
12452 | else | |
12453 | dwp_file->version = 2; | |
73869dc2 DE |
12454 | |
12455 | if (dwp_file->version == 2) | |
400174b1 TT |
12456 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12457 | dwarf2_locate_v2_dwp_sections, | |
12458 | dwp_file.get ()); | |
73869dc2 | 12459 | |
298e9637 SM |
12460 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12461 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12462 | |
b4f54984 | 12463 | if (dwarf_read_debug) |
80626a55 DE |
12464 | { |
12465 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12466 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12467 | " %s CUs, %s TUs\n", |
12468 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12469 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12470 | } |
12471 | ||
12472 | return dwp_file; | |
3019eac3 | 12473 | } |
c906108c | 12474 | |
ab5088bf DE |
12475 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12476 | ||
12477 | static struct dwp_file * | |
ed2dc618 | 12478 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
12479 | { |
12480 | if (! dwarf2_per_objfile->dwp_checked) | |
12481 | { | |
ed2dc618 SM |
12482 | dwarf2_per_objfile->dwp_file |
12483 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
12484 | dwarf2_per_objfile->dwp_checked = 1; |
12485 | } | |
400174b1 | 12486 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
12487 | } |
12488 | ||
80626a55 DE |
12489 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12490 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12491 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12492 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12493 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12494 | ||
12495 | This is called, for example, when wanting to read a variable with a | |
12496 | complex location. Therefore we don't want to do file i/o for every call. | |
12497 | Therefore we don't want to look for a DWO file on every call. | |
12498 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12499 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12500 | for a DWO file. | |
12501 | ||
1c658ad5 | 12502 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12503 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12504 | |
3019eac3 | 12505 | static struct dwo_unit * |
80626a55 DE |
12506 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12507 | const char *dwo_name, const char *comp_dir, | |
12508 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 12509 | { |
ed2dc618 | 12510 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 12511 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
12512 | const char *kind = is_debug_types ? "TU" : "CU"; |
12513 | void **dwo_file_slot; | |
3019eac3 | 12514 | struct dwo_file *dwo_file; |
80626a55 | 12515 | struct dwp_file *dwp_file; |
cb1df416 | 12516 | |
6a506a2d DE |
12517 | /* First see if there's a DWP file. |
12518 | If we have a DWP file but didn't find the DWO inside it, don't | |
12519 | look for the original DWO file. It makes gdb behave differently | |
12520 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12521 | |
ed2dc618 | 12522 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 12523 | if (dwp_file != NULL) |
cf2c3c16 | 12524 | { |
80626a55 DE |
12525 | const struct dwp_hash_table *dwp_htab = |
12526 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12527 | ||
12528 | if (dwp_htab != NULL) | |
12529 | { | |
12530 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 12531 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 12532 | signature, is_debug_types); |
80626a55 DE |
12533 | |
12534 | if (dwo_cutu != NULL) | |
12535 | { | |
b4f54984 | 12536 | if (dwarf_read_debug) |
80626a55 DE |
12537 | { |
12538 | fprintf_unfiltered (gdb_stdlog, | |
12539 | "Virtual DWO %s %s found: @%s\n", | |
12540 | kind, hex_string (signature), | |
12541 | host_address_to_string (dwo_cutu)); | |
12542 | } | |
12543 | return dwo_cutu; | |
12544 | } | |
12545 | } | |
12546 | } | |
6a506a2d | 12547 | else |
80626a55 | 12548 | { |
6a506a2d | 12549 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12550 | |
ed2dc618 SM |
12551 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12552 | dwo_name, comp_dir); | |
6a506a2d | 12553 | if (*dwo_file_slot == NULL) |
80626a55 | 12554 | { |
6a506a2d DE |
12555 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12556 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12557 | } |
6a506a2d | 12558 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12559 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12560 | |
6a506a2d | 12561 | if (dwo_file != NULL) |
19c3d4c9 | 12562 | { |
6a506a2d DE |
12563 | struct dwo_unit *dwo_cutu = NULL; |
12564 | ||
12565 | if (is_debug_types && dwo_file->tus) | |
12566 | { | |
12567 | struct dwo_unit find_dwo_cutu; | |
12568 | ||
12569 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12570 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12571 | dwo_cutu |
b0b6a987 TT |
12572 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12573 | &find_dwo_cutu); | |
6a506a2d | 12574 | } |
33c5cd75 | 12575 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12576 | { |
33c5cd75 DB |
12577 | struct dwo_unit find_dwo_cutu; |
12578 | ||
12579 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12580 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12581 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12582 | &find_dwo_cutu); |
6a506a2d DE |
12583 | } |
12584 | ||
12585 | if (dwo_cutu != NULL) | |
12586 | { | |
b4f54984 | 12587 | if (dwarf_read_debug) |
6a506a2d DE |
12588 | { |
12589 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12590 | kind, dwo_name, hex_string (signature), | |
12591 | host_address_to_string (dwo_cutu)); | |
12592 | } | |
12593 | return dwo_cutu; | |
80626a55 DE |
12594 | } |
12595 | } | |
2e276125 | 12596 | } |
9cdd5dbd | 12597 | |
80626a55 DE |
12598 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12599 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12600 | correctly to find the file. */ | |
12601 | ||
b4f54984 | 12602 | if (dwarf_read_debug) |
80626a55 DE |
12603 | { |
12604 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12605 | kind, dwo_name, hex_string (signature)); | |
12606 | } | |
3019eac3 | 12607 | |
6656a72d DE |
12608 | /* This is a warning and not a complaint because it can be caused by |
12609 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12610 | { |
12611 | /* Print the name of the DWP file if we looked there, helps the user | |
12612 | better diagnose the problem. */ | |
791afaa2 | 12613 | std::string dwp_text; |
43942612 DE |
12614 | |
12615 | if (dwp_file != NULL) | |
791afaa2 TT |
12616 | dwp_text = string_printf (" [in DWP file %s]", |
12617 | lbasename (dwp_file->name)); | |
43942612 | 12618 | |
9d8780f0 | 12619 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
12620 | " [in module %s]"), |
12621 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12622 | dwp_text.c_str (), |
43942612 | 12623 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 12624 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12625 | } |
3019eac3 | 12626 | return NULL; |
5fb290d7 DJ |
12627 | } |
12628 | ||
80626a55 DE |
12629 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12630 | See lookup_dwo_cutu_unit for details. */ | |
12631 | ||
12632 | static struct dwo_unit * | |
12633 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12634 | const char *dwo_name, const char *comp_dir, | |
12635 | ULONGEST signature) | |
12636 | { | |
12637 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12638 | } | |
12639 | ||
12640 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12641 | See lookup_dwo_cutu_unit for details. */ | |
12642 | ||
12643 | static struct dwo_unit * | |
12644 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12645 | const char *dwo_name, const char *comp_dir) | |
12646 | { | |
12647 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12648 | } | |
12649 | ||
89e63ee4 DE |
12650 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12651 | ||
12652 | static int | |
12653 | queue_and_load_dwo_tu (void **slot, void *info) | |
12654 | { | |
12655 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12656 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12657 | ULONGEST signature = dwo_unit->signature; | |
12658 | struct signatured_type *sig_type = | |
12659 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12660 | ||
12661 | if (sig_type != NULL) | |
12662 | { | |
12663 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12664 | ||
12665 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12666 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12667 | while processing PER_CU. */ | |
12668 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12669 | load_full_type_unit (sig_cu); | |
ae640021 | 12670 | per_cu->imported_symtabs_push (sig_cu); |
89e63ee4 DE |
12671 | } |
12672 | ||
12673 | return 1; | |
12674 | } | |
12675 | ||
12676 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12677 | The DWO may have the only definition of the type, though it may not be | |
12678 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12679 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12680 | ||
12681 | static void | |
12682 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12683 | { | |
12684 | struct dwo_unit *dwo_unit; | |
12685 | struct dwo_file *dwo_file; | |
12686 | ||
12687 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 12688 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
12689 | gdb_assert (per_cu->cu != NULL); |
12690 | ||
12691 | dwo_unit = per_cu->cu->dwo_unit; | |
12692 | gdb_assert (dwo_unit != NULL); | |
12693 | ||
12694 | dwo_file = dwo_unit->dwo_file; | |
12695 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
12696 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, |
12697 | per_cu); | |
89e63ee4 DE |
12698 | } |
12699 | ||
3019eac3 | 12700 | /* Read in various DIEs. */ |
348e048f | 12701 | |
d389af10 | 12702 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12703 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12704 | already referenced by DW_AT_abstract_origin from the children of the | |
12705 | current DIE. */ | |
d389af10 JK |
12706 | |
12707 | static void | |
12708 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12709 | { | |
12710 | struct die_info *child_die; | |
791afaa2 | 12711 | sect_offset *offsetp; |
d389af10 JK |
12712 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12713 | struct die_info *origin_die; | |
12714 | /* Iterator of the ORIGIN_DIE children. */ | |
12715 | struct die_info *origin_child_die; | |
d389af10 | 12716 | struct attribute *attr; |
cd02d79d PA |
12717 | struct dwarf2_cu *origin_cu; |
12718 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12719 | |
12720 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12721 | if (!attr) | |
12722 | return; | |
12723 | ||
cd02d79d PA |
12724 | /* Note that following die references may follow to a die in a |
12725 | different cu. */ | |
12726 | ||
12727 | origin_cu = cu; | |
12728 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12729 | ||
12730 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12731 | symbols in. */ | |
12732 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12733 | origin_cu->list_in_scope = cu->list_in_scope; | |
12734 | ||
edb3359d DJ |
12735 | if (die->tag != origin_die->tag |
12736 | && !(die->tag == DW_TAG_inlined_subroutine | |
12737 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12738 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12739 | sect_offset_str (die->sect_off), |
12740 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12741 | |
791afaa2 | 12742 | std::vector<sect_offset> offsets; |
d389af10 | 12743 | |
3ea89b92 PMR |
12744 | for (child_die = die->child; |
12745 | child_die && child_die->tag; | |
12746 | child_die = sibling_die (child_die)) | |
12747 | { | |
12748 | struct die_info *child_origin_die; | |
12749 | struct dwarf2_cu *child_origin_cu; | |
12750 | ||
12751 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12752 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12753 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12754 | present in the abstract instance but not referenced in the concrete | |
12755 | one. */ | |
216f72a1 JK |
12756 | if (child_die->tag == DW_TAG_call_site |
12757 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12758 | continue; |
12759 | ||
c38f313d DJ |
12760 | /* For each CHILD_DIE, find the corresponding child of |
12761 | ORIGIN_DIE. If there is more than one layer of | |
12762 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12763 | but GCC versions at least through 4.4 generate this (GCC PR | |
12764 | 40573). */ | |
3ea89b92 PMR |
12765 | child_origin_die = child_die; |
12766 | child_origin_cu = cu; | |
c38f313d DJ |
12767 | while (1) |
12768 | { | |
cd02d79d PA |
12769 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12770 | child_origin_cu); | |
c38f313d DJ |
12771 | if (attr == NULL) |
12772 | break; | |
cd02d79d PA |
12773 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12774 | &child_origin_cu); | |
c38f313d DJ |
12775 | } |
12776 | ||
d389af10 JK |
12777 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12778 | counterpart may exist. */ | |
c38f313d | 12779 | if (child_origin_die != child_die) |
d389af10 | 12780 | { |
edb3359d DJ |
12781 | if (child_die->tag != child_origin_die->tag |
12782 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12783 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12784 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12785 | "different tags"), |
9d8780f0 SM |
12786 | sect_offset_str (child_die->sect_off), |
12787 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12788 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12789 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12790 | "different parents"), |
9d8780f0 SM |
12791 | sect_offset_str (child_die->sect_off), |
12792 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12793 | else |
791afaa2 | 12794 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12795 | } |
d389af10 | 12796 | } |
791afaa2 TT |
12797 | std::sort (offsets.begin (), offsets.end ()); |
12798 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12799 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12800 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12801 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12802 | "to DIE %s as their abstract origin"), |
12803 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12804 | |
791afaa2 | 12805 | offsetp = offsets.data (); |
d389af10 JK |
12806 | origin_child_die = origin_die->child; |
12807 | while (origin_child_die && origin_child_die->tag) | |
12808 | { | |
12809 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12810 | while (offsetp < offsets_end |
9c541725 | 12811 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12812 | offsetp++; |
b64f50a1 | 12813 | if (offsetp >= offsets_end |
9c541725 | 12814 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12815 | { |
adde2bff DE |
12816 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12817 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12818 | This can happen with mutually referenced abstract_origins. | |
12819 | PR 16581. */ | |
12820 | if (!origin_child_die->in_process) | |
12821 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12822 | } |
12823 | origin_child_die = sibling_die (origin_child_die); | |
12824 | } | |
cd02d79d | 12825 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12826 | |
12827 | if (cu != origin_cu) | |
12828 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12829 | } |
12830 | ||
c906108c | 12831 | static void |
e7c27a73 | 12832 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12833 | { |
518817b3 | 12834 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 12835 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12836 | struct context_stack *newobj; |
c906108c SS |
12837 | CORE_ADDR lowpc; |
12838 | CORE_ADDR highpc; | |
12839 | struct die_info *child_die; | |
edb3359d | 12840 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12841 | const char *name; |
e142c38c | 12842 | CORE_ADDR baseaddr; |
801e3a5b | 12843 | struct block *block; |
edb3359d | 12844 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12845 | std::vector<struct symbol *> template_args; |
34eaf542 | 12846 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12847 | |
12848 | if (inlined_func) | |
12849 | { | |
12850 | /* If we do not have call site information, we can't show the | |
12851 | caller of this inlined function. That's too confusing, so | |
12852 | only use the scope for local variables. */ | |
12853 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12854 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12855 | if (call_line == NULL || call_file == NULL) | |
12856 | { | |
12857 | read_lexical_block_scope (die, cu); | |
12858 | return; | |
12859 | } | |
12860 | } | |
c906108c | 12861 | |
b3b3bada | 12862 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12863 | |
94af9270 | 12864 | name = dwarf2_name (die, cu); |
c906108c | 12865 | |
e8d05480 JB |
12866 | /* Ignore functions with missing or empty names. These are actually |
12867 | illegal according to the DWARF standard. */ | |
12868 | if (name == NULL) | |
12869 | { | |
b98664d3 | 12870 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12871 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12872 | return; |
12873 | } | |
12874 | ||
12875 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12876 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12877 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12878 | { |
ae4d0c03 PM |
12879 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12880 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 12881 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12882 | "for subprogram DIE at %s"), |
12883 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12884 | return; |
12885 | } | |
c906108c | 12886 | |
3e29f34a MR |
12887 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12888 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12889 | |
34eaf542 TT |
12890 | /* If we have any template arguments, then we must allocate a |
12891 | different sort of symbol. */ | |
12892 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12893 | { | |
12894 | if (child_die->tag == DW_TAG_template_type_param | |
12895 | || child_die->tag == DW_TAG_template_value_param) | |
12896 | { | |
e623cf5d | 12897 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12898 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12899 | break; |
12900 | } | |
12901 | } | |
12902 | ||
c24bdb02 | 12903 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
12904 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
12905 | (struct symbol *) templ_func); | |
4c2df51b | 12906 | |
81873cc8 | 12907 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 12908 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
12909 | cu->language); |
12910 | ||
4cecd739 DJ |
12911 | /* If there is a location expression for DW_AT_frame_base, record |
12912 | it. */ | |
e142c38c | 12913 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 12914 | if (attr != nullptr) |
fe978cb0 | 12915 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12916 | |
63e43d3a PMR |
12917 | /* If there is a location for the static link, record it. */ |
12918 | newobj->static_link = NULL; | |
12919 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 12920 | if (attr != nullptr) |
63e43d3a | 12921 | { |
224c3ddb SM |
12922 | newobj->static_link |
12923 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 12924 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
09ba997f | 12925 | cu->per_cu->addr_type ()); |
63e43d3a PMR |
12926 | } |
12927 | ||
c24bdb02 | 12928 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 12929 | |
639d11d3 | 12930 | if (die->child != NULL) |
c906108c | 12931 | { |
639d11d3 | 12932 | child_die = die->child; |
c906108c SS |
12933 | while (child_die && child_die->tag) |
12934 | { | |
34eaf542 TT |
12935 | if (child_die->tag == DW_TAG_template_type_param |
12936 | || child_die->tag == DW_TAG_template_value_param) | |
12937 | { | |
12938 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12939 | ||
f1078f66 | 12940 | if (arg != NULL) |
2f4732b0 | 12941 | template_args.push_back (arg); |
34eaf542 TT |
12942 | } |
12943 | else | |
12944 | process_die (child_die, cu); | |
c906108c SS |
12945 | child_die = sibling_die (child_die); |
12946 | } | |
12947 | } | |
12948 | ||
d389af10 JK |
12949 | inherit_abstract_dies (die, cu); |
12950 | ||
4a811a97 UW |
12951 | /* If we have a DW_AT_specification, we might need to import using |
12952 | directives from the context of the specification DIE. See the | |
12953 | comment in determine_prefix. */ | |
12954 | if (cu->language == language_cplus | |
12955 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12956 | { | |
12957 | struct dwarf2_cu *spec_cu = cu; | |
12958 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12959 | ||
12960 | while (spec_die) | |
12961 | { | |
12962 | child_die = spec_die->child; | |
12963 | while (child_die && child_die->tag) | |
12964 | { | |
12965 | if (child_die->tag == DW_TAG_imported_module) | |
12966 | process_die (child_die, spec_cu); | |
12967 | child_die = sibling_die (child_die); | |
12968 | } | |
12969 | ||
12970 | /* In some cases, GCC generates specification DIEs that | |
12971 | themselves contain DW_AT_specification attributes. */ | |
12972 | spec_die = die_specification (spec_die, &spec_cu); | |
12973 | } | |
12974 | } | |
12975 | ||
c24bdb02 | 12976 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 12977 | /* Make a block for the local symbols within. */ |
c24bdb02 | 12978 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 12979 | cstk.static_link, lowpc, highpc); |
801e3a5b | 12980 | |
df8a16a1 | 12981 | /* For C++, set the block's scope. */ |
45280282 IB |
12982 | if ((cu->language == language_cplus |
12983 | || cu->language == language_fortran | |
c44af4eb TT |
12984 | || cu->language == language_d |
12985 | || cu->language == language_rust) | |
4d4ec4e5 | 12986 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12987 | block_set_scope (block, determine_prefix (die, cu), |
12988 | &objfile->objfile_obstack); | |
df8a16a1 | 12989 | |
801e3a5b JB |
12990 | /* If we have address ranges, record them. */ |
12991 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12992 | |
a60f3166 | 12993 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 12994 | |
34eaf542 | 12995 | /* Attach template arguments to function. */ |
2f4732b0 | 12996 | if (!template_args.empty ()) |
34eaf542 TT |
12997 | { |
12998 | gdb_assert (templ_func != NULL); | |
12999 | ||
2f4732b0 | 13000 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13001 | templ_func->template_arguments |
8d749320 SM |
13002 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13003 | templ_func->n_template_arguments); | |
34eaf542 | 13004 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13005 | template_args.data (), |
34eaf542 | 13006 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13007 | |
13008 | /* Make sure that the symtab is set on the new symbols. Even | |
13009 | though they don't appear in this symtab directly, other parts | |
13010 | of gdb assume that symbols do, and this is reasonably | |
13011 | true. */ | |
8634679f | 13012 | for (symbol *sym : template_args) |
3e1d3d8c | 13013 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13014 | } |
13015 | ||
208d8187 JB |
13016 | /* In C++, we can have functions nested inside functions (e.g., when |
13017 | a function declares a class that has methods). This means that | |
13018 | when we finish processing a function scope, we may need to go | |
13019 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13020 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13021 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13022 | |
921e78cf JB |
13023 | /* If we've finished processing a top-level function, subsequent |
13024 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13025 | if (cu->get_builder ()->outermost_context_p ()) |
13026 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13027 | } |
13028 | ||
13029 | /* Process all the DIES contained within a lexical block scope. Start | |
13030 | a new scope, process the dies, and then close the scope. */ | |
13031 | ||
13032 | static void | |
e7c27a73 | 13033 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13034 | { |
518817b3 | 13035 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13036 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13037 | CORE_ADDR lowpc, highpc; |
13038 | struct die_info *child_die; | |
e142c38c DJ |
13039 | CORE_ADDR baseaddr; |
13040 | ||
b3b3bada | 13041 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13042 | |
13043 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13044 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13045 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13046 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13047 | describe ranges. */ |
e385593e JK |
13048 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13049 | { | |
13050 | case PC_BOUNDS_NOT_PRESENT: | |
13051 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13052 | there was no wrapping by that DW_TAG_lexical_block. | |
13053 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13054 | for (child_die = die->child; | |
13055 | child_die != NULL && child_die->tag; | |
13056 | child_die = sibling_die (child_die)) | |
13057 | process_die (child_die, cu); | |
13058 | return; | |
13059 | case PC_BOUNDS_INVALID: | |
13060 | return; | |
13061 | } | |
3e29f34a MR |
13062 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13063 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13064 | |
c24bdb02 | 13065 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13066 | if (die->child != NULL) |
c906108c | 13067 | { |
639d11d3 | 13068 | child_die = die->child; |
c906108c SS |
13069 | while (child_die && child_die->tag) |
13070 | { | |
e7c27a73 | 13071 | process_die (child_die, cu); |
c906108c SS |
13072 | child_die = sibling_die (child_die); |
13073 | } | |
13074 | } | |
3ea89b92 | 13075 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13076 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13077 | |
c24bdb02 KS |
13078 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13079 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13080 | { |
801e3a5b | 13081 | struct block *block |
c24bdb02 | 13082 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13083 | cstk.start_addr, highpc); |
801e3a5b JB |
13084 | |
13085 | /* Note that recording ranges after traversing children, as we | |
13086 | do here, means that recording a parent's ranges entails | |
13087 | walking across all its children's ranges as they appear in | |
13088 | the address map, which is quadratic behavior. | |
13089 | ||
13090 | It would be nicer to record the parent's ranges before | |
13091 | traversing its children, simply overriding whatever you find | |
13092 | there. But since we don't even decide whether to create a | |
13093 | block until after we've traversed its children, that's hard | |
13094 | to do. */ | |
13095 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13096 | } |
c24bdb02 KS |
13097 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13098 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13099 | } |
13100 | ||
216f72a1 | 13101 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13102 | |
13103 | static void | |
13104 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13105 | { | |
518817b3 | 13106 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13107 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13108 | CORE_ADDR pc, baseaddr; | |
13109 | struct attribute *attr; | |
13110 | struct call_site *call_site, call_site_local; | |
13111 | void **slot; | |
13112 | int nparams; | |
13113 | struct die_info *child_die; | |
13114 | ||
b3b3bada | 13115 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13116 | |
216f72a1 JK |
13117 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13118 | if (attr == NULL) | |
13119 | { | |
13120 | /* This was a pre-DWARF-5 GNU extension alias | |
13121 | for DW_AT_call_return_pc. */ | |
13122 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13123 | } | |
96408a79 SA |
13124 | if (!attr) |
13125 | { | |
b98664d3 | 13126 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13127 | "DIE %s [in module %s]"), |
13128 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13129 | return; |
13130 | } | |
cd6c91b4 | 13131 | pc = attr->value_as_address () + baseaddr; |
3e29f34a | 13132 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13133 | |
13134 | if (cu->call_site_htab == NULL) | |
13135 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13136 | NULL, &objfile->objfile_obstack, | |
13137 | hashtab_obstack_allocate, NULL); | |
13138 | call_site_local.pc = pc; | |
13139 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13140 | if (*slot != NULL) | |
13141 | { | |
b98664d3 | 13142 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13143 | "DIE %s [in module %s]"), |
13144 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13145 | objfile_name (objfile)); |
96408a79 SA |
13146 | return; |
13147 | } | |
13148 | ||
13149 | /* Count parameters at the caller. */ | |
13150 | ||
13151 | nparams = 0; | |
13152 | for (child_die = die->child; child_die && child_die->tag; | |
13153 | child_die = sibling_die (child_die)) | |
13154 | { | |
216f72a1 JK |
13155 | if (child_die->tag != DW_TAG_call_site_parameter |
13156 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13157 | { |
b98664d3 | 13158 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13159 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13160 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13161 | objfile_name (objfile)); |
96408a79 SA |
13162 | continue; |
13163 | } | |
13164 | ||
13165 | nparams++; | |
13166 | } | |
13167 | ||
224c3ddb SM |
13168 | call_site |
13169 | = ((struct call_site *) | |
13170 | obstack_alloc (&objfile->objfile_obstack, | |
13171 | sizeof (*call_site) | |
13172 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13173 | *slot = call_site; |
13174 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13175 | call_site->pc = pc; | |
13176 | ||
216f72a1 JK |
13177 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13178 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13179 | { |
13180 | struct die_info *func_die; | |
13181 | ||
13182 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13183 | for (func_die = die->parent; | |
13184 | func_die && func_die->tag != DW_TAG_subprogram | |
13185 | && func_die->tag != DW_TAG_subroutine_type; | |
13186 | func_die = func_die->parent); | |
13187 | ||
216f72a1 JK |
13188 | /* DW_AT_call_all_calls is a superset |
13189 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13190 | if (func_die |
216f72a1 | 13191 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13192 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13193 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13194 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13195 | { | |
13196 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13197 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13198 | both the initial caller containing the real return address PC and | |
13199 | the final callee containing the current PC of a chain of tail | |
13200 | calls do not need to have the tail call list complete. But any | |
13201 | function candidate for a virtual tail call frame searched via | |
13202 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13203 | determined unambiguously. */ | |
13204 | } | |
13205 | else | |
13206 | { | |
13207 | struct type *func_type = NULL; | |
13208 | ||
13209 | if (func_die) | |
13210 | func_type = get_die_type (func_die, cu); | |
13211 | if (func_type != NULL) | |
13212 | { | |
13213 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
13214 | ||
13215 | /* Enlist this call site to the function. */ | |
13216 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13217 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13218 | } | |
13219 | else | |
b98664d3 | 13220 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13221 | "DIE %s [in module %s]"), |
13222 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13223 | } |
13224 | } | |
13225 | ||
216f72a1 JK |
13226 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13227 | if (attr == NULL) | |
13228 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13229 | if (attr == NULL) | |
13230 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13231 | if (attr == NULL) |
216f72a1 JK |
13232 | { |
13233 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13234 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13235 | } | |
96408a79 | 13236 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
4fc6c0d5 | 13237 | if (!attr || (attr->form_is_block () && DW_BLOCK (attr)->size == 0)) |
96408a79 | 13238 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13239 | else if (attr->form_is_block ()) |
96408a79 SA |
13240 | { |
13241 | struct dwarf2_locexpr_baton *dlbaton; | |
13242 | ||
8d749320 | 13243 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
13244 | dlbaton->data = DW_BLOCK (attr)->data; |
13245 | dlbaton->size = DW_BLOCK (attr)->size; | |
13246 | dlbaton->per_cu = cu->per_cu; | |
13247 | ||
13248 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13249 | } | |
cd6c91b4 | 13250 | else if (attr->form_is_ref ()) |
96408a79 | 13251 | { |
96408a79 SA |
13252 | struct dwarf2_cu *target_cu = cu; |
13253 | struct die_info *target_die; | |
13254 | ||
ac9ec31b | 13255 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 13256 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
13257 | if (die_is_declaration (target_die, target_cu)) |
13258 | { | |
7d45c7c3 | 13259 | const char *target_physname; |
9112db09 JK |
13260 | |
13261 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13262 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13263 | if (target_physname == NULL) |
9112db09 | 13264 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13265 | if (target_physname == NULL) |
b98664d3 | 13266 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13267 | "physname, for referencing DIE %s [in module %s]"), |
13268 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13269 | else |
7d455152 | 13270 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13271 | } |
13272 | else | |
13273 | { | |
13274 | CORE_ADDR lowpc; | |
13275 | ||
13276 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13277 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13278 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13279 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13280 | "low pc, for referencing DIE %s [in module %s]"), |
13281 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13282 | else |
3e29f34a MR |
13283 | { |
13284 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13285 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13286 | } | |
96408a79 SA |
13287 | } |
13288 | } | |
13289 | else | |
b98664d3 | 13290 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13291 | "block nor reference, for DIE %s [in module %s]"), |
13292 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13293 | |
13294 | call_site->per_cu = cu->per_cu; | |
13295 | ||
13296 | for (child_die = die->child; | |
13297 | child_die && child_die->tag; | |
13298 | child_die = sibling_die (child_die)) | |
13299 | { | |
96408a79 | 13300 | struct call_site_parameter *parameter; |
1788b2d3 | 13301 | struct attribute *loc, *origin; |
96408a79 | 13302 | |
216f72a1 JK |
13303 | if (child_die->tag != DW_TAG_call_site_parameter |
13304 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
13305 | { |
13306 | /* Already printed the complaint above. */ | |
13307 | continue; | |
13308 | } | |
13309 | ||
13310 | gdb_assert (call_site->parameter_count < nparams); | |
13311 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13312 | ||
1788b2d3 JK |
13313 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13314 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13315 | register is contained in DW_AT_call_value. */ |
96408a79 | 13316 | |
24c5c679 | 13317 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13318 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13319 | if (origin == NULL) | |
13320 | { | |
13321 | /* This was a pre-DWARF-5 GNU extension alias | |
13322 | for DW_AT_call_parameter. */ | |
13323 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13324 | } | |
cd6c91b4 | 13325 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13326 | { |
1788b2d3 | 13327 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
13328 | |
13329 | sect_offset sect_off | |
13330 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
4057dfde | 13331 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13332 | { |
13333 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13334 | binding can be done only inside one CU. Such referenced DIE | |
13335 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13336 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13337 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13338 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13339 | objfile_name (objfile)); |
d76b7dbc JK |
13340 | continue; |
13341 | } | |
9c541725 PA |
13342 | parameter->u.param_cu_off |
13343 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13344 | } |
4fc6c0d5 | 13345 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13346 | { |
b98664d3 | 13347 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13348 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13349 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13350 | continue; |
13351 | } | |
24c5c679 | 13352 | else |
96408a79 | 13353 | { |
24c5c679 JK |
13354 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
13355 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
13356 | if (parameter->u.dwarf_reg != -1) | |
13357 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
13358 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
13359 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
13360 | ¶meter->u.fb_offset)) | |
13361 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13362 | else | |
13363 | { | |
b98664d3 | 13364 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13365 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13366 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13367 | "[in module %s]"), |
9d8780f0 | 13368 | sect_offset_str (child_die->sect_off), |
9c541725 | 13369 | objfile_name (objfile)); |
24c5c679 JK |
13370 | continue; |
13371 | } | |
96408a79 SA |
13372 | } |
13373 | ||
216f72a1 JK |
13374 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13375 | if (attr == NULL) | |
13376 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13377 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13378 | { |
b98664d3 | 13379 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13380 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13381 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13382 | objfile_name (objfile)); |
96408a79 SA |
13383 | continue; |
13384 | } | |
13385 | parameter->value = DW_BLOCK (attr)->data; | |
13386 | parameter->value_size = DW_BLOCK (attr)->size; | |
13387 | ||
13388 | /* Parameters are not pre-cleared by memset above. */ | |
13389 | parameter->data_value = NULL; | |
13390 | parameter->data_value_size = 0; | |
13391 | call_site->parameter_count++; | |
13392 | ||
216f72a1 JK |
13393 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13394 | if (attr == NULL) | |
13395 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13396 | if (attr != nullptr) |
96408a79 | 13397 | { |
4fc6c0d5 | 13398 | if (!attr->form_is_block ()) |
b98664d3 | 13399 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
13400 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13401 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13402 | objfile_name (objfile)); |
96408a79 SA |
13403 | else |
13404 | { | |
13405 | parameter->data_value = DW_BLOCK (attr)->data; | |
13406 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13407 | } | |
13408 | } | |
13409 | } | |
13410 | } | |
13411 | ||
71a3c369 TT |
13412 | /* Helper function for read_variable. If DIE represents a virtual |
13413 | table, then return the type of the concrete object that is | |
13414 | associated with the virtual table. Otherwise, return NULL. */ | |
13415 | ||
13416 | static struct type * | |
13417 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13418 | { | |
13419 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13420 | if (attr == NULL) | |
13421 | return NULL; | |
13422 | ||
13423 | /* Find the type DIE. */ | |
13424 | struct die_info *type_die = NULL; | |
13425 | struct dwarf2_cu *type_cu = cu; | |
13426 | ||
cd6c91b4 | 13427 | if (attr->form_is_ref ()) |
71a3c369 TT |
13428 | type_die = follow_die_ref (die, attr, &type_cu); |
13429 | if (type_die == NULL) | |
13430 | return NULL; | |
13431 | ||
13432 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13433 | return NULL; | |
13434 | return die_containing_type (type_die, type_cu); | |
13435 | } | |
13436 | ||
13437 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13438 | ||
13439 | static void | |
13440 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13441 | { | |
13442 | struct rust_vtable_symbol *storage = NULL; | |
13443 | ||
13444 | if (cu->language == language_rust) | |
13445 | { | |
13446 | struct type *containing_type = rust_containing_type (die, cu); | |
13447 | ||
13448 | if (containing_type != NULL) | |
13449 | { | |
518817b3 | 13450 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 | 13451 | |
468c0cbb | 13452 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol (); |
71a3c369 TT |
13453 | initialize_objfile_symbol (storage); |
13454 | storage->concrete_type = containing_type; | |
cf724bc9 | 13455 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13456 | } |
13457 | } | |
13458 | ||
e4a62c65 TV |
13459 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13460 | struct attribute *abstract_origin | |
13461 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13462 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13463 | if (res == NULL && loc && abstract_origin) | |
13464 | { | |
13465 | /* We have a variable without a name, but with a location and an abstract | |
13466 | origin. This may be a concrete instance of an abstract variable | |
13467 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13468 | later. */ | |
13469 | struct dwarf2_cu *origin_cu = cu; | |
13470 | struct die_info *origin_die | |
13471 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
13472 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 13473 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 13474 | } |
71a3c369 TT |
13475 | } |
13476 | ||
43988095 JK |
13477 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13478 | reading .debug_rnglists. | |
13479 | Callback's type should be: | |
13480 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13481 | Return true if the attributes are present and valid, otherwise, | |
13482 | return false. */ | |
13483 | ||
13484 | template <typename Callback> | |
13485 | static bool | |
13486 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13487 | Callback &&callback) | |
13488 | { | |
ed2dc618 | 13489 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13490 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13491 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 13492 | bfd *obfd = objfile->obfd; |
43988095 JK |
13493 | /* Base address selection entry. */ |
13494 | CORE_ADDR base; | |
13495 | int found_base; | |
43988095 | 13496 | const gdb_byte *buffer; |
43988095 JK |
13497 | CORE_ADDR baseaddr; |
13498 | bool overflow = false; | |
13499 | ||
13500 | found_base = cu->base_known; | |
13501 | base = cu->base_address; | |
13502 | ||
96b79293 | 13503 | dwarf2_per_objfile->rnglists.read (objfile); |
43988095 JK |
13504 | if (offset >= dwarf2_per_objfile->rnglists.size) |
13505 | { | |
b98664d3 | 13506 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13507 | offset); |
13508 | return false; | |
13509 | } | |
13510 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13511 | ||
b3b3bada | 13512 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13513 | |
13514 | while (1) | |
13515 | { | |
7814882a JK |
13516 | /* Initialize it due to a false compiler warning. */ |
13517 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13518 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13519 | + dwarf2_per_objfile->rnglists.size); | |
13520 | unsigned int bytes_read; | |
13521 | ||
13522 | if (buffer == buf_end) | |
13523 | { | |
13524 | overflow = true; | |
13525 | break; | |
13526 | } | |
13527 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13528 | switch (rlet) | |
13529 | { | |
13530 | case DW_RLE_end_of_list: | |
13531 | break; | |
13532 | case DW_RLE_base_address: | |
13533 | if (buffer + cu->header.addr_size > buf_end) | |
13534 | { | |
13535 | overflow = true; | |
13536 | break; | |
13537 | } | |
c8a7a66f | 13538 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13539 | found_base = 1; |
13540 | buffer += bytes_read; | |
13541 | break; | |
13542 | case DW_RLE_start_length: | |
13543 | if (buffer + cu->header.addr_size > buf_end) | |
13544 | { | |
13545 | overflow = true; | |
13546 | break; | |
13547 | } | |
c8a7a66f TT |
13548 | range_beginning = cu->header.read_address (obfd, buffer, |
13549 | &bytes_read); | |
43988095 JK |
13550 | buffer += bytes_read; |
13551 | range_end = (range_beginning | |
13552 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13553 | buffer += bytes_read; | |
13554 | if (buffer > buf_end) | |
13555 | { | |
13556 | overflow = true; | |
13557 | break; | |
13558 | } | |
13559 | break; | |
13560 | case DW_RLE_offset_pair: | |
13561 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13562 | buffer += bytes_read; | |
13563 | if (buffer > buf_end) | |
13564 | { | |
13565 | overflow = true; | |
13566 | break; | |
13567 | } | |
13568 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13569 | buffer += bytes_read; | |
13570 | if (buffer > buf_end) | |
13571 | { | |
13572 | overflow = true; | |
13573 | break; | |
13574 | } | |
13575 | break; | |
13576 | case DW_RLE_start_end: | |
13577 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13578 | { | |
13579 | overflow = true; | |
13580 | break; | |
13581 | } | |
c8a7a66f TT |
13582 | range_beginning = cu->header.read_address (obfd, buffer, |
13583 | &bytes_read); | |
43988095 | 13584 | buffer += bytes_read; |
c8a7a66f | 13585 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13586 | buffer += bytes_read; |
13587 | break; | |
13588 | default: | |
b98664d3 | 13589 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13590 | return false; |
13591 | } | |
13592 | if (rlet == DW_RLE_end_of_list || overflow) | |
13593 | break; | |
13594 | if (rlet == DW_RLE_base_address) | |
13595 | continue; | |
13596 | ||
13597 | if (!found_base) | |
13598 | { | |
13599 | /* We have no valid base address for the ranges | |
13600 | data. */ | |
b98664d3 | 13601 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13602 | return false; |
13603 | } | |
13604 | ||
13605 | if (range_beginning > range_end) | |
13606 | { | |
13607 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13608 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13609 | return false; |
13610 | } | |
13611 | ||
13612 | /* Empty range entries have no effect. */ | |
13613 | if (range_beginning == range_end) | |
13614 | continue; | |
13615 | ||
13616 | range_beginning += base; | |
13617 | range_end += base; | |
13618 | ||
13619 | /* A not-uncommon case of bad debug info. | |
13620 | Don't pollute the addrmap with bad data. */ | |
13621 | if (range_beginning + baseaddr == 0 | |
13622 | && !dwarf2_per_objfile->has_section_at_zero) | |
13623 | { | |
b98664d3 | 13624 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
13625 | " [in module %s]"), objfile_name (objfile)); |
13626 | continue; | |
13627 | } | |
13628 | ||
13629 | callback (range_beginning, range_end); | |
13630 | } | |
13631 | ||
13632 | if (overflow) | |
13633 | { | |
b98664d3 | 13634 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13635 | "for DW_AT_ranges attribute"), |
13636 | offset); | |
13637 | return false; | |
13638 | } | |
13639 | ||
13640 | return true; | |
13641 | } | |
13642 | ||
13643 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13644 | Callback's type should be: | |
13645 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13646 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13647 | |
43988095 | 13648 | template <typename Callback> |
43039443 | 13649 | static int |
5f46c5a5 | 13650 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13651 | Callback &&callback) |
43039443 | 13652 | { |
ed2dc618 | 13653 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13654 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13655 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
13656 | struct comp_unit_head *cu_header = &cu->header; |
13657 | bfd *obfd = objfile->obfd; | |
13658 | unsigned int addr_size = cu_header->addr_size; | |
13659 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13660 | /* Base address selection entry. */ | |
13661 | CORE_ADDR base; | |
13662 | int found_base; | |
13663 | unsigned int dummy; | |
d521ce57 | 13664 | const gdb_byte *buffer; |
ff013f42 | 13665 | CORE_ADDR baseaddr; |
43039443 | 13666 | |
43988095 JK |
13667 | if (cu_header->version >= 5) |
13668 | return dwarf2_rnglists_process (offset, cu, callback); | |
13669 | ||
d00adf39 DE |
13670 | found_base = cu->base_known; |
13671 | base = cu->base_address; | |
43039443 | 13672 | |
96b79293 | 13673 | dwarf2_per_objfile->ranges.read (objfile); |
dce234bc | 13674 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 13675 | { |
b98664d3 | 13676 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13677 | offset); |
13678 | return 0; | |
13679 | } | |
dce234bc | 13680 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13681 | |
b3b3bada | 13682 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13683 | |
43039443 JK |
13684 | while (1) |
13685 | { | |
13686 | CORE_ADDR range_beginning, range_end; | |
13687 | ||
c8a7a66f | 13688 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13689 | buffer += addr_size; |
c8a7a66f | 13690 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13691 | buffer += addr_size; |
13692 | offset += 2 * addr_size; | |
13693 | ||
13694 | /* An end of list marker is a pair of zero addresses. */ | |
13695 | if (range_beginning == 0 && range_end == 0) | |
13696 | /* Found the end of list entry. */ | |
13697 | break; | |
13698 | ||
13699 | /* Each base address selection entry is a pair of 2 values. | |
13700 | The first is the largest possible address, the second is | |
13701 | the base address. Check for a base address here. */ | |
13702 | if ((range_beginning & mask) == mask) | |
13703 | { | |
28d2bfb9 AB |
13704 | /* If we found the largest possible address, then we already |
13705 | have the base address in range_end. */ | |
13706 | base = range_end; | |
43039443 JK |
13707 | found_base = 1; |
13708 | continue; | |
13709 | } | |
13710 | ||
13711 | if (!found_base) | |
13712 | { | |
13713 | /* We have no valid base address for the ranges | |
13714 | data. */ | |
b98664d3 | 13715 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13716 | return 0; |
13717 | } | |
13718 | ||
9277c30c UW |
13719 | if (range_beginning > range_end) |
13720 | { | |
13721 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13722 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13723 | return 0; |
13724 | } | |
13725 | ||
13726 | /* Empty range entries have no effect. */ | |
13727 | if (range_beginning == range_end) | |
13728 | continue; | |
13729 | ||
43039443 JK |
13730 | range_beginning += base; |
13731 | range_end += base; | |
13732 | ||
01093045 DE |
13733 | /* A not-uncommon case of bad debug info. |
13734 | Don't pollute the addrmap with bad data. */ | |
13735 | if (range_beginning + baseaddr == 0 | |
13736 | && !dwarf2_per_objfile->has_section_at_zero) | |
13737 | { | |
b98664d3 | 13738 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13739 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13740 | continue; |
13741 | } | |
13742 | ||
5f46c5a5 JK |
13743 | callback (range_beginning, range_end); |
13744 | } | |
13745 | ||
13746 | return 1; | |
13747 | } | |
13748 | ||
13749 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13750 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13751 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13752 | ||
13753 | static int | |
13754 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13755 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
891813be | 13756 | dwarf2_psymtab *ranges_pst) |
5f46c5a5 | 13757 | { |
518817b3 | 13758 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 | 13759 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
b3b3bada | 13760 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13761 | int low_set = 0; |
13762 | CORE_ADDR low = 0; | |
13763 | CORE_ADDR high = 0; | |
13764 | int retval; | |
13765 | ||
13766 | retval = dwarf2_ranges_process (offset, cu, | |
13767 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13768 | { | |
9277c30c | 13769 | if (ranges_pst != NULL) |
3e29f34a MR |
13770 | { |
13771 | CORE_ADDR lowpc; | |
13772 | CORE_ADDR highpc; | |
13773 | ||
79748972 TT |
13774 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13775 | range_beginning + baseaddr) | |
13776 | - baseaddr); | |
13777 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13778 | range_end + baseaddr) | |
13779 | - baseaddr); | |
d320c2b5 TT |
13780 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
13781 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 13782 | } |
ff013f42 | 13783 | |
43039443 JK |
13784 | /* FIXME: This is recording everything as a low-high |
13785 | segment of consecutive addresses. We should have a | |
13786 | data structure for discontiguous block ranges | |
13787 | instead. */ | |
13788 | if (! low_set) | |
13789 | { | |
13790 | low = range_beginning; | |
13791 | high = range_end; | |
13792 | low_set = 1; | |
13793 | } | |
13794 | else | |
13795 | { | |
13796 | if (range_beginning < low) | |
13797 | low = range_beginning; | |
13798 | if (range_end > high) | |
13799 | high = range_end; | |
13800 | } | |
5f46c5a5 JK |
13801 | }); |
13802 | if (!retval) | |
13803 | return 0; | |
43039443 JK |
13804 | |
13805 | if (! low_set) | |
13806 | /* If the first entry is an end-of-list marker, the range | |
13807 | describes an empty scope, i.e. no instructions. */ | |
13808 | return 0; | |
13809 | ||
13810 | if (low_return) | |
13811 | *low_return = low; | |
13812 | if (high_return) | |
13813 | *high_return = high; | |
13814 | return 1; | |
13815 | } | |
13816 | ||
3a2b436a JK |
13817 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13818 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13819 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13820 | |
3a2b436a | 13821 | static enum pc_bounds_kind |
af34e669 | 13822 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13823 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13824 | dwarf2_psymtab *pst) |
c906108c | 13825 | { |
518817b3 SM |
13826 | struct dwarf2_per_objfile *dwarf2_per_objfile |
13827 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 13828 | struct attribute *attr; |
91da1414 | 13829 | struct attribute *attr_high; |
af34e669 DJ |
13830 | CORE_ADDR low = 0; |
13831 | CORE_ADDR high = 0; | |
e385593e | 13832 | enum pc_bounds_kind ret; |
c906108c | 13833 | |
91da1414 MW |
13834 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13835 | if (attr_high) | |
af34e669 | 13836 | { |
e142c38c | 13837 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13838 | if (attr != nullptr) |
91da1414 | 13839 | { |
cd6c91b4 TT |
13840 | low = attr->value_as_address (); |
13841 | high = attr_high->value_as_address (); | |
13842 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) | |
31aa7e4e | 13843 | high += low; |
91da1414 | 13844 | } |
af34e669 DJ |
13845 | else |
13846 | /* Found high w/o low attribute. */ | |
e385593e | 13847 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13848 | |
13849 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13850 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13851 | } |
c906108c | 13852 | else |
af34e669 | 13853 | { |
e142c38c | 13854 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13855 | if (attr != NULL) |
13856 | { | |
18a8505e | 13857 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
13858 | We take advantage of the fact that DW_AT_ranges does not appear |
13859 | in DW_TAG_compile_unit of DWO files. */ | |
13860 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13861 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13862 | + (need_ranges_base | |
13863 | ? cu->ranges_base | |
13864 | : 0)); | |
2e3cf129 | 13865 | |
af34e669 | 13866 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13867 | .debug_ranges section. */ |
2e3cf129 | 13868 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13869 | return PC_BOUNDS_INVALID; |
43039443 | 13870 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13871 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13872 | } |
e385593e JK |
13873 | else |
13874 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13875 | } |
c906108c | 13876 | |
48fbe735 | 13877 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 13878 | if (high <= low) |
e385593e | 13879 | return PC_BOUNDS_INVALID; |
c906108c SS |
13880 | |
13881 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13882 | eliminate duplicate copies of functions and vtables and such. | |
13883 | The linker will arbitrarily choose one and discard the others. | |
13884 | The AT_*_pc values for such functions refer to local labels in | |
13885 | these sections. If the section from that file was discarded, the | |
13886 | labels are not in the output, so the relocs get a value of 0. | |
13887 | If this is a discarded function, mark the pc bounds as invalid, | |
13888 | so that GDB will ignore it. */ | |
72dca2f5 | 13889 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13890 | return PC_BOUNDS_INVALID; |
c906108c SS |
13891 | |
13892 | *lowpc = low; | |
96408a79 SA |
13893 | if (highpc) |
13894 | *highpc = high; | |
af34e669 | 13895 | return ret; |
c906108c SS |
13896 | } |
13897 | ||
b084d499 JB |
13898 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13899 | its low and high PC addresses. Do nothing if these addresses could not | |
13900 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13901 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13902 | ||
13903 | static void | |
13904 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13905 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13906 | struct dwarf2_cu *cu) | |
13907 | { | |
13908 | CORE_ADDR low, high; | |
13909 | struct die_info *child = die->child; | |
13910 | ||
e385593e | 13911 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13912 | { |
325fac50 PA |
13913 | *lowpc = std::min (*lowpc, low); |
13914 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13915 | } |
13916 | ||
13917 | /* If the language does not allow nested subprograms (either inside | |
13918 | subprograms or lexical blocks), we're done. */ | |
13919 | if (cu->language != language_ada) | |
13920 | return; | |
6e70227d | 13921 | |
b084d499 JB |
13922 | /* Check all the children of the given DIE. If it contains nested |
13923 | subprograms, then check their pc bounds. Likewise, we need to | |
13924 | check lexical blocks as well, as they may also contain subprogram | |
13925 | definitions. */ | |
13926 | while (child && child->tag) | |
13927 | { | |
13928 | if (child->tag == DW_TAG_subprogram | |
13929 | || child->tag == DW_TAG_lexical_block) | |
13930 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13931 | child = sibling_die (child); | |
13932 | } | |
13933 | } | |
13934 | ||
fae299cd DC |
13935 | /* Get the low and high pc's represented by the scope DIE, and store |
13936 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13937 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13938 | ||
13939 | static void | |
13940 | get_scope_pc_bounds (struct die_info *die, | |
13941 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13942 | struct dwarf2_cu *cu) | |
13943 | { | |
13944 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13945 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13946 | CORE_ADDR current_low, current_high; | |
13947 | ||
3a2b436a | 13948 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13949 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13950 | { |
13951 | best_low = current_low; | |
13952 | best_high = current_high; | |
13953 | } | |
13954 | else | |
13955 | { | |
13956 | struct die_info *child = die->child; | |
13957 | ||
13958 | while (child && child->tag) | |
13959 | { | |
13960 | switch (child->tag) { | |
13961 | case DW_TAG_subprogram: | |
b084d499 | 13962 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13963 | break; |
13964 | case DW_TAG_namespace: | |
f55ee35c | 13965 | case DW_TAG_module: |
fae299cd DC |
13966 | /* FIXME: carlton/2004-01-16: Should we do this for |
13967 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13968 | that current GCC's always emit the DIEs corresponding | |
13969 | to definitions of methods of classes as children of a | |
13970 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13971 | the DIEs giving the declarations, which could be | |
13972 | anywhere). But I don't see any reason why the | |
13973 | standards says that they have to be there. */ | |
13974 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13975 | ||
13976 | if (current_low != ((CORE_ADDR) -1)) | |
13977 | { | |
325fac50 PA |
13978 | best_low = std::min (best_low, current_low); |
13979 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13980 | } |
13981 | break; | |
13982 | default: | |
0963b4bd | 13983 | /* Ignore. */ |
fae299cd DC |
13984 | break; |
13985 | } | |
13986 | ||
13987 | child = sibling_die (child); | |
13988 | } | |
13989 | } | |
13990 | ||
13991 | *lowpc = best_low; | |
13992 | *highpc = best_high; | |
13993 | } | |
13994 | ||
801e3a5b JB |
13995 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13996 | in DIE. */ | |
380bca97 | 13997 | |
801e3a5b JB |
13998 | static void |
13999 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14000 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14001 | { | |
518817b3 | 14002 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14003 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14004 | struct attribute *attr; |
91da1414 | 14005 | struct attribute *attr_high; |
801e3a5b | 14006 | |
91da1414 MW |
14007 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14008 | if (attr_high) | |
801e3a5b | 14009 | { |
801e3a5b | 14010 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14011 | if (attr != nullptr) |
801e3a5b | 14012 | { |
cd6c91b4 TT |
14013 | CORE_ADDR low = attr->value_as_address (); |
14014 | CORE_ADDR high = attr_high->value_as_address (); | |
31aa7e4e | 14015 | |
cd6c91b4 | 14016 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14017 | high += low; |
9a619af0 | 14018 | |
3e29f34a MR |
14019 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14020 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14021 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14022 | } |
14023 | } | |
14024 | ||
14025 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
435d3d88 | 14026 | if (attr != nullptr) |
801e3a5b | 14027 | { |
18a8505e | 14028 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
14029 | We take advantage of the fact that DW_AT_ranges does not appear |
14030 | in DW_TAG_compile_unit of DWO files. */ | |
14031 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14032 | |
14033 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14034 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14035 | unsigned long offset = (DW_UNSND (attr) |
14036 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14037 | |
2d5f09ec | 14038 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14039 | dwarf2_ranges_process (offset, cu, |
14040 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14041 | { | |
58fdfd2c JK |
14042 | start += baseaddr; |
14043 | end += baseaddr; | |
5f46c5a5 JK |
14044 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14045 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14046 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14047 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14048 | }); |
2d5f09ec KB |
14049 | |
14050 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14051 | } |
14052 | } | |
14053 | ||
685b1105 JK |
14054 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14055 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14056 | |
685b1105 JK |
14057 | static void |
14058 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14059 | { |
38360086 | 14060 | int major, minor; |
60d5a603 JK |
14061 | |
14062 | if (cu->producer == NULL) | |
14063 | { | |
14064 | /* For unknown compilers expect their behavior is DWARF version | |
14065 | compliant. | |
14066 | ||
14067 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14068 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14069 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14070 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14071 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14072 | } |
b1ffba5a | 14073 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14074 | { |
38360086 MW |
14075 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14076 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14077 | } |
5230b05a | 14078 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14079 | { |
14080 | cu->producer_is_icc = true; | |
14081 | cu->producer_is_icc_lt_14 = major < 14; | |
14082 | } | |
c258c396 JD |
14083 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14084 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14085 | else |
14086 | { | |
14087 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14088 | compliant. */ | |
60d5a603 JK |
14089 | } |
14090 | ||
9068261f | 14091 | cu->checked_producer = true; |
685b1105 | 14092 | } |
ba919b58 | 14093 | |
685b1105 JK |
14094 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14095 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14096 | during 4.6.0 experimental. */ | |
14097 | ||
9068261f | 14098 | static bool |
685b1105 JK |
14099 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14100 | { | |
14101 | if (!cu->checked_producer) | |
14102 | check_producer (cu); | |
14103 | ||
14104 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14105 | } |
14106 | ||
c258c396 JD |
14107 | |
14108 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14109 | with incorrect is_stmt attributes. */ | |
14110 | ||
14111 | static bool | |
14112 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14113 | { | |
14114 | if (!cu->checked_producer) | |
14115 | check_producer (cu); | |
14116 | ||
14117 | return cu->producer_is_codewarrior; | |
14118 | } | |
14119 | ||
405feb71 | 14120 | /* Return the default accessibility type if it is not overridden by |
60d5a603 JK |
14121 | DW_AT_accessibility. */ |
14122 | ||
14123 | static enum dwarf_access_attribute | |
14124 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14125 | { | |
14126 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14127 | { | |
14128 | /* The default DWARF 2 accessibility for members is public, the default | |
14129 | accessibility for inheritance is private. */ | |
14130 | ||
14131 | if (die->tag != DW_TAG_inheritance) | |
14132 | return DW_ACCESS_public; | |
14133 | else | |
14134 | return DW_ACCESS_private; | |
14135 | } | |
14136 | else | |
14137 | { | |
14138 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14139 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14140 | depends on the container kind. */ | |
14141 | ||
14142 | if (die->parent->tag == DW_TAG_class_type) | |
14143 | return DW_ACCESS_private; | |
14144 | else | |
14145 | return DW_ACCESS_public; | |
14146 | } | |
14147 | } | |
14148 | ||
74ac6d43 TT |
14149 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14150 | offset. If the attribute was not found return 0, otherwise return | |
14151 | 1. If it was found but could not properly be handled, set *OFFSET | |
14152 | to 0. */ | |
14153 | ||
14154 | static int | |
14155 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14156 | LONGEST *offset) | |
14157 | { | |
14158 | struct attribute *attr; | |
14159 | ||
14160 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14161 | if (attr != NULL) | |
14162 | { | |
14163 | *offset = 0; | |
14164 | ||
14165 | /* Note that we do not check for a section offset first here. | |
14166 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14167 | so if we see it, we can assume that a constant form is really | |
14168 | a constant and not a section offset. */ | |
cd6c91b4 | 14169 | if (attr->form_is_constant ()) |
74ac6d43 | 14170 | *offset = dwarf2_get_attr_constant_value (attr, 0); |
cd6c91b4 | 14171 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14172 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14173 | else if (attr->form_is_block ()) |
74ac6d43 TT |
14174 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
14175 | else | |
14176 | dwarf2_complex_location_expr_complaint (); | |
14177 | ||
14178 | return 1; | |
14179 | } | |
14180 | ||
14181 | return 0; | |
14182 | } | |
14183 | ||
c906108c SS |
14184 | /* Add an aggregate field to the field list. */ |
14185 | ||
14186 | static void | |
107d2387 | 14187 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14188 | struct dwarf2_cu *cu) |
6e70227d | 14189 | { |
518817b3 | 14190 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 14191 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14192 | struct nextfield *new_field; |
14193 | struct attribute *attr; | |
14194 | struct field *fp; | |
15d034d0 | 14195 | const char *fieldname = ""; |
c906108c | 14196 | |
7d0ccb61 DJ |
14197 | if (die->tag == DW_TAG_inheritance) |
14198 | { | |
be2daae6 TT |
14199 | fip->baseclasses.emplace_back (); |
14200 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14201 | } |
14202 | else | |
14203 | { | |
be2daae6 TT |
14204 | fip->fields.emplace_back (); |
14205 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14206 | } |
be2daae6 | 14207 | |
e142c38c | 14208 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14209 | if (attr != nullptr) |
c906108c | 14210 | new_field->accessibility = DW_UNSND (attr); |
60d5a603 JK |
14211 | else |
14212 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14213 | if (new_field->accessibility != DW_ACCESS_public) |
14214 | fip->non_public_fields = 1; | |
60d5a603 | 14215 | |
e142c38c | 14216 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14217 | if (attr != nullptr) |
c906108c | 14218 | new_field->virtuality = DW_UNSND (attr); |
60d5a603 JK |
14219 | else |
14220 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14221 | |
14222 | fp = &new_field->field; | |
a9a9bd0f | 14223 | |
e142c38c | 14224 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14225 | { |
74ac6d43 TT |
14226 | LONGEST offset; |
14227 | ||
a9a9bd0f | 14228 | /* Data member other than a C++ static data member. */ |
6e70227d | 14229 | |
c906108c | 14230 | /* Get type of field. */ |
e7c27a73 | 14231 | fp->type = die_type (die, cu); |
c906108c | 14232 | |
d6a843b5 | 14233 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14234 | |
c906108c | 14235 | /* Get bit size of field (zero if none). */ |
e142c38c | 14236 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14237 | if (attr != nullptr) |
c906108c SS |
14238 | { |
14239 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
14240 | } | |
14241 | else | |
14242 | { | |
14243 | FIELD_BITSIZE (*fp) = 0; | |
14244 | } | |
14245 | ||
14246 | /* Get bit offset of field. */ | |
74ac6d43 TT |
14247 | if (handle_data_member_location (die, cu, &offset)) |
14248 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 14249 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
435d3d88 | 14250 | if (attr != nullptr) |
c906108c | 14251 | { |
d5a22e77 | 14252 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14253 | { |
14254 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
14255 | additional bit offset from the MSB of the containing |
14256 | anonymous object to the MSB of the field. We don't | |
14257 | have to do anything special since we don't need to | |
14258 | know the size of the anonymous object. */ | |
f41f5e61 | 14259 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
14260 | } |
14261 | else | |
14262 | { | |
14263 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
14264 | MSB of the anonymous object, subtract off the number of |
14265 | bits from the MSB of the field to the MSB of the | |
14266 | object, and then subtract off the number of bits of | |
14267 | the field itself. The result is the bit offset of | |
14268 | the LSB of the field. */ | |
c906108c SS |
14269 | int anonymous_size; |
14270 | int bit_offset = DW_UNSND (attr); | |
14271 | ||
e142c38c | 14272 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 14273 | if (attr != nullptr) |
c906108c SS |
14274 | { |
14275 | /* The size of the anonymous object containing | |
14276 | the bit field is explicit, so use the | |
14277 | indicated size (in bytes). */ | |
14278 | anonymous_size = DW_UNSND (attr); | |
14279 | } | |
14280 | else | |
14281 | { | |
14282 | /* The size of the anonymous object containing | |
14283 | the bit field must be inferred from the type | |
14284 | attribute of the data member containing the | |
14285 | bit field. */ | |
14286 | anonymous_size = TYPE_LENGTH (fp->type); | |
14287 | } | |
f41f5e61 PA |
14288 | SET_FIELD_BITPOS (*fp, |
14289 | (FIELD_BITPOS (*fp) | |
14290 | + anonymous_size * bits_per_byte | |
14291 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14292 | } |
14293 | } | |
da5b30da AA |
14294 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14295 | if (attr != NULL) | |
14296 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
14297 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
14298 | |
14299 | /* Get name of field. */ | |
39cbfefa DJ |
14300 | fieldname = dwarf2_name (die, cu); |
14301 | if (fieldname == NULL) | |
14302 | fieldname = ""; | |
d8151005 DJ |
14303 | |
14304 | /* The name is already allocated along with this objfile, so we don't | |
14305 | need to duplicate it for the type. */ | |
14306 | fp->name = fieldname; | |
c906108c SS |
14307 | |
14308 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 14309 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14310 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14311 | { |
d48cc9dd | 14312 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
14313 | new_field->accessibility = DW_ACCESS_private; |
14314 | fip->non_public_fields = 1; | |
14315 | } | |
14316 | } | |
a9a9bd0f | 14317 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14318 | { |
a9a9bd0f DC |
14319 | /* C++ static member. */ |
14320 | ||
14321 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14322 | is a declaration, but all versions of G++ as of this writing | |
14323 | (so through at least 3.2.1) incorrectly generate | |
14324 | DW_TAG_variable tags. */ | |
6e70227d | 14325 | |
ff355380 | 14326 | const char *physname; |
c906108c | 14327 | |
a9a9bd0f | 14328 | /* Get name of field. */ |
39cbfefa DJ |
14329 | fieldname = dwarf2_name (die, cu); |
14330 | if (fieldname == NULL) | |
c906108c SS |
14331 | return; |
14332 | ||
254e6b9e | 14333 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14334 | if (attr |
14335 | /* Only create a symbol if this is an external value. | |
14336 | new_symbol checks this and puts the value in the global symbol | |
14337 | table, which we want. If it is not external, new_symbol | |
14338 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14339 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14340 | { |
14341 | /* A static const member, not much different than an enum as far as | |
14342 | we're concerned, except that we can support more types. */ | |
14343 | new_symbol (die, NULL, cu); | |
14344 | } | |
14345 | ||
2df3850c | 14346 | /* Get physical name. */ |
ff355380 | 14347 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14348 | |
d8151005 DJ |
14349 | /* The name is already allocated along with this objfile, so we don't |
14350 | need to duplicate it for the type. */ | |
14351 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 14352 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 14353 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14354 | } |
14355 | else if (die->tag == DW_TAG_inheritance) | |
14356 | { | |
74ac6d43 | 14357 | LONGEST offset; |
d4b96c9a | 14358 | |
74ac6d43 TT |
14359 | /* C++ base class field. */ |
14360 | if (handle_data_member_location (die, cu, &offset)) | |
14361 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 14362 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 14363 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 14364 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 14365 | } |
2ddeaf8a TT |
14366 | else if (die->tag == DW_TAG_variant_part) |
14367 | { | |
14368 | /* process_structure_scope will treat this DIE as a union. */ | |
14369 | process_structure_scope (die, cu); | |
14370 | ||
14371 | /* The variant part is relative to the start of the enclosing | |
14372 | structure. */ | |
14373 | SET_FIELD_BITPOS (*fp, 0); | |
14374 | fp->type = get_die_type (die, cu); | |
14375 | fp->artificial = 1; | |
14376 | fp->name = "<<variant>>"; | |
c8c81635 TT |
14377 | |
14378 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
14379 | representation requires one, so set it to the maximum of the | |
489dbda6 TT |
14380 | child sizes, being sure to account for the offset at which |
14381 | each child is seen. */ | |
c8c81635 TT |
14382 | if (TYPE_LENGTH (fp->type) == 0) |
14383 | { | |
14384 | unsigned max = 0; | |
14385 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
489dbda6 TT |
14386 | { |
14387 | unsigned len = ((TYPE_FIELD_BITPOS (fp->type, i) + 7) / 8 | |
14388 | + TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i))); | |
14389 | if (len > max) | |
14390 | max = len; | |
14391 | } | |
c8c81635 TT |
14392 | TYPE_LENGTH (fp->type) = max; |
14393 | } | |
2ddeaf8a TT |
14394 | } |
14395 | else | |
14396 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14397 | } |
14398 | ||
883fd55a KS |
14399 | /* Can the type given by DIE define another type? */ |
14400 | ||
14401 | static bool | |
14402 | type_can_define_types (const struct die_info *die) | |
14403 | { | |
14404 | switch (die->tag) | |
14405 | { | |
14406 | case DW_TAG_typedef: | |
14407 | case DW_TAG_class_type: | |
14408 | case DW_TAG_structure_type: | |
14409 | case DW_TAG_union_type: | |
14410 | case DW_TAG_enumeration_type: | |
14411 | return true; | |
14412 | ||
14413 | default: | |
14414 | return false; | |
14415 | } | |
14416 | } | |
14417 | ||
14418 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14419 | |
14420 | static void | |
883fd55a KS |
14421 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14422 | struct dwarf2_cu *cu) | |
6e70227d | 14423 | { |
be2daae6 TT |
14424 | struct decl_field fp; |
14425 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14426 | |
883fd55a | 14427 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14428 | |
883fd55a | 14429 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14430 | fp.name = dwarf2_name (die, cu); |
14431 | fp.type = read_type_die (die, cu); | |
98751a41 | 14432 | |
c191a687 KS |
14433 | /* Save accessibility. */ |
14434 | enum dwarf_access_attribute accessibility; | |
14435 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14436 | if (attr != NULL) | |
14437 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14438 | else | |
14439 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14440 | switch (accessibility) | |
14441 | { | |
14442 | case DW_ACCESS_public: | |
14443 | /* The assumed value if neither private nor protected. */ | |
14444 | break; | |
14445 | case DW_ACCESS_private: | |
be2daae6 | 14446 | fp.is_private = 1; |
c191a687 KS |
14447 | break; |
14448 | case DW_ACCESS_protected: | |
be2daae6 | 14449 | fp.is_protected = 1; |
c191a687 KS |
14450 | break; |
14451 | default: | |
b98664d3 | 14452 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
14453 | } |
14454 | ||
883fd55a | 14455 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14456 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14457 | else |
be2daae6 | 14458 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14459 | } |
14460 | ||
c906108c SS |
14461 | /* Create the vector of fields, and attach it to the type. */ |
14462 | ||
14463 | static void | |
fba45db2 | 14464 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14465 | struct dwarf2_cu *cu) |
c906108c | 14466 | { |
317f7127 | 14467 | int nfields = fip->nfields (); |
c906108c SS |
14468 | |
14469 | /* Record the field count, allocate space for the array of fields, | |
14470 | and create blank accessibility bitfields if necessary. */ | |
14471 | TYPE_NFIELDS (type) = nfields; | |
14472 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 14473 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 14474 | |
b4ba55a1 | 14475 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14476 | { |
14477 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14478 | ||
14479 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14480 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14481 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14482 | ||
14483 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14484 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14485 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14486 | ||
774b6a14 TT |
14487 | TYPE_FIELD_IGNORE_BITS (type) = |
14488 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14489 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14490 | } |
14491 | ||
14492 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14493 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14494 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14495 | { |
be2daae6 | 14496 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14497 | unsigned char *pointer; |
c906108c SS |
14498 | |
14499 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14500 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14501 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14502 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14503 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14504 | } |
14505 | ||
2ddeaf8a TT |
14506 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
14507 | { | |
14508 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
14509 | ||
be2daae6 | 14510 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 14511 | { |
be2daae6 TT |
14512 | struct nextfield &field = fip->fields[index]; |
14513 | ||
14514 | if (field.variant.is_discriminant) | |
2ddeaf8a | 14515 | di->discriminant_index = index; |
be2daae6 | 14516 | else if (field.variant.default_branch) |
2ddeaf8a TT |
14517 | di->default_index = index; |
14518 | else | |
be2daae6 | 14519 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
14520 | } |
14521 | } | |
14522 | ||
be2daae6 TT |
14523 | /* Copy the saved-up fields into the field vector. */ |
14524 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14525 | { |
be2daae6 TT |
14526 | struct nextfield &field |
14527 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14528 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14529 | |
be2daae6 TT |
14530 | TYPE_FIELD (type, i) = field.field; |
14531 | switch (field.accessibility) | |
c906108c | 14532 | { |
c5aa993b | 14533 | case DW_ACCESS_private: |
b4ba55a1 | 14534 | if (cu->language != language_ada) |
be2daae6 | 14535 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14536 | break; |
c906108c | 14537 | |
c5aa993b | 14538 | case DW_ACCESS_protected: |
b4ba55a1 | 14539 | if (cu->language != language_ada) |
be2daae6 | 14540 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14541 | break; |
c906108c | 14542 | |
c5aa993b JM |
14543 | case DW_ACCESS_public: |
14544 | break; | |
c906108c | 14545 | |
c5aa993b JM |
14546 | default: |
14547 | /* Unknown accessibility. Complain and treat it as public. */ | |
14548 | { | |
b98664d3 | 14549 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14550 | field.accessibility); |
c5aa993b JM |
14551 | } |
14552 | break; | |
c906108c | 14553 | } |
be2daae6 | 14554 | if (i < fip->baseclasses.size ()) |
c906108c | 14555 | { |
be2daae6 | 14556 | switch (field.virtuality) |
c906108c | 14557 | { |
c5aa993b JM |
14558 | case DW_VIRTUALITY_virtual: |
14559 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14560 | if (cu->language == language_ada) |
a73c6dcd | 14561 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14562 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14563 | break; |
c906108c SS |
14564 | } |
14565 | } | |
c906108c SS |
14566 | } |
14567 | } | |
14568 | ||
7d27a96d TT |
14569 | /* Return true if this member function is a constructor, false |
14570 | otherwise. */ | |
14571 | ||
14572 | static int | |
14573 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14574 | { | |
14575 | const char *fieldname; | |
fe978cb0 | 14576 | const char *type_name; |
7d27a96d TT |
14577 | int len; |
14578 | ||
14579 | if (die->parent == NULL) | |
14580 | return 0; | |
14581 | ||
14582 | if (die->parent->tag != DW_TAG_structure_type | |
14583 | && die->parent->tag != DW_TAG_union_type | |
14584 | && die->parent->tag != DW_TAG_class_type) | |
14585 | return 0; | |
14586 | ||
14587 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14588 | type_name = dwarf2_name (die->parent, cu); |
14589 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14590 | return 0; |
14591 | ||
14592 | len = strlen (fieldname); | |
fe978cb0 PA |
14593 | return (strncmp (fieldname, type_name, len) == 0 |
14594 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14595 | } |
14596 | ||
e35000a7 TBA |
14597 | /* Check if the given VALUE is a recognized enum |
14598 | dwarf_defaulted_attribute constant according to DWARF5 spec, | |
14599 | Table 7.24. */ | |
14600 | ||
14601 | static bool | |
14602 | is_valid_DW_AT_defaulted (ULONGEST value) | |
14603 | { | |
14604 | switch (value) | |
14605 | { | |
14606 | case DW_DEFAULTED_no: | |
14607 | case DW_DEFAULTED_in_class: | |
14608 | case DW_DEFAULTED_out_of_class: | |
14609 | return true; | |
14610 | } | |
14611 | ||
3142e908 | 14612 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
e35000a7 TBA |
14613 | return false; |
14614 | } | |
14615 | ||
c906108c SS |
14616 | /* Add a member function to the proper fieldlist. */ |
14617 | ||
14618 | static void | |
107d2387 | 14619 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14620 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14621 | { |
518817b3 | 14622 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 14623 | struct attribute *attr; |
c906108c | 14624 | int i; |
be2daae6 | 14625 | struct fnfieldlist *flp = nullptr; |
c906108c | 14626 | struct fn_field *fnp; |
15d034d0 | 14627 | const char *fieldname; |
f792889a | 14628 | struct type *this_type; |
60d5a603 | 14629 | enum dwarf_access_attribute accessibility; |
c906108c | 14630 | |
b4ba55a1 | 14631 | if (cu->language == language_ada) |
a73c6dcd | 14632 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14633 | |
2df3850c | 14634 | /* Get name of member function. */ |
39cbfefa DJ |
14635 | fieldname = dwarf2_name (die, cu); |
14636 | if (fieldname == NULL) | |
2df3850c | 14637 | return; |
c906108c | 14638 | |
c906108c | 14639 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14640 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14641 | { |
27bfe10e | 14642 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14643 | { |
14644 | flp = &fip->fnfieldlists[i]; | |
14645 | break; | |
14646 | } | |
c906108c SS |
14647 | } |
14648 | ||
be2daae6 TT |
14649 | /* Create a new fnfieldlist if necessary. */ |
14650 | if (flp == nullptr) | |
c906108c | 14651 | { |
be2daae6 TT |
14652 | fip->fnfieldlists.emplace_back (); |
14653 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14654 | flp->name = fieldname; |
be2daae6 | 14655 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14656 | } |
14657 | ||
be2daae6 TT |
14658 | /* Create a new member function field and add it to the vector of |
14659 | fnfieldlists. */ | |
14660 | flp->fnfields.emplace_back (); | |
14661 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14662 | |
14663 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14664 | if (cu->language == language_cplus) |
be2daae6 TT |
14665 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
14666 | die, cu); | |
3da10d80 KS |
14667 | else |
14668 | { | |
1d06ead6 | 14669 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14670 | fnp->physname = physname ? physname : ""; |
14671 | } | |
14672 | ||
c906108c | 14673 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14674 | this_type = read_type_die (die, cu); |
14675 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14676 | { |
f792889a | 14677 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14678 | |
f792889a | 14679 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14680 | of the method itself (TYPE_CODE_METHOD). */ |
14681 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14682 | TYPE_TARGET_TYPE (this_type), |
14683 | TYPE_FIELDS (this_type), | |
14684 | TYPE_NFIELDS (this_type), | |
14685 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14686 | |
14687 | /* Handle static member functions. | |
c5aa993b | 14688 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14689 | member functions. G++ helps GDB by marking the first |
14690 | parameter for non-static member functions (which is the this | |
14691 | pointer) as artificial. We obtain this information from | |
14692 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14693 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14694 | fnp->voffset = VOFFSET_STATIC; |
14695 | } | |
14696 | else | |
b98664d3 | 14697 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 14698 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14699 | |
14700 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14701 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14702 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14703 | |
3e43a32a MS |
14704 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14705 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14706 | |
14707 | /* Get accessibility. */ | |
e142c38c | 14708 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14709 | if (attr != nullptr) |
aead7601 | 14710 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14711 | else |
14712 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14713 | switch (accessibility) | |
c906108c | 14714 | { |
60d5a603 JK |
14715 | case DW_ACCESS_private: |
14716 | fnp->is_private = 1; | |
14717 | break; | |
14718 | case DW_ACCESS_protected: | |
14719 | fnp->is_protected = 1; | |
14720 | break; | |
c906108c SS |
14721 | } |
14722 | ||
b02dede2 | 14723 | /* Check for artificial methods. */ |
e142c38c | 14724 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14725 | if (attr && DW_UNSND (attr) != 0) |
14726 | fnp->is_artificial = 1; | |
14727 | ||
e35000a7 TBA |
14728 | /* Check for defaulted methods. */ |
14729 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
14730 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) | |
14731 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); | |
14732 | ||
14733 | /* Check for deleted methods. */ | |
14734 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
14735 | if (attr != nullptr && DW_UNSND (attr) != 0) | |
14736 | fnp->is_deleted = 1; | |
14737 | ||
7d27a96d TT |
14738 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14739 | ||
0d564a31 | 14740 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14741 | function. For older versions of GCC, this is an offset in the |
14742 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14743 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14744 | to the object address. */ |
14745 | ||
e142c38c | 14746 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 14747 | if (attr != nullptr) |
8e19ed76 | 14748 | { |
4fc6c0d5 | 14749 | if (attr->form_is_block () && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14750 | { |
aec5aa8b TT |
14751 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14752 | { | |
14753 | /* Old-style GCC. */ | |
14754 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14755 | } | |
14756 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14757 | || (DW_BLOCK (attr)->size > 1 | |
14758 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14759 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14760 | { | |
aec5aa8b TT |
14761 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14762 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14763 | dwarf2_complex_location_expr_complaint (); | |
14764 | else | |
14765 | fnp->voffset /= cu->header.addr_size; | |
14766 | fnp->voffset += 2; | |
14767 | } | |
14768 | else | |
14769 | dwarf2_complex_location_expr_complaint (); | |
14770 | ||
14771 | if (!fnp->fcontext) | |
7e993ebf KS |
14772 | { |
14773 | /* If there is no `this' field and no DW_AT_containing_type, | |
14774 | we cannot actually find a base class context for the | |
14775 | vtable! */ | |
14776 | if (TYPE_NFIELDS (this_type) == 0 | |
14777 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14778 | { | |
b98664d3 | 14779 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
14780 | "function \"%s\" (offset %s)"), |
14781 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
14782 | } |
14783 | else | |
14784 | { | |
14785 | fnp->fcontext | |
14786 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14787 | } | |
14788 | } | |
aec5aa8b | 14789 | } |
cd6c91b4 | 14790 | else if (attr->form_is_section_offset ()) |
8e19ed76 | 14791 | { |
4d3c2250 | 14792 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14793 | } |
14794 | else | |
14795 | { | |
4d3c2250 KB |
14796 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14797 | fieldname); | |
8e19ed76 | 14798 | } |
0d564a31 | 14799 | } |
d48cc9dd DJ |
14800 | else |
14801 | { | |
14802 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14803 | if (attr && DW_UNSND (attr)) | |
14804 | { | |
14805 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 14806 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 14807 | "but the vtable offset is not specified"), |
9d8780f0 | 14808 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 14809 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14810 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14811 | } | |
14812 | } | |
c906108c SS |
14813 | } |
14814 | ||
14815 | /* Create the vector of member function fields, and attach it to the type. */ | |
14816 | ||
14817 | static void | |
fba45db2 | 14818 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14819 | struct dwarf2_cu *cu) |
c906108c | 14820 | { |
b4ba55a1 | 14821 | if (cu->language == language_ada) |
a73c6dcd | 14822 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14823 | |
c906108c SS |
14824 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14825 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
14826 | TYPE_ALLOC (type, |
14827 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 14828 | |
be2daae6 | 14829 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14830 | { |
be2daae6 | 14831 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 14832 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 14833 | |
be2daae6 TT |
14834 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
14835 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 14836 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
14837 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
14838 | ||
14839 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
14840 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
14841 | } |
14842 | ||
be2daae6 | 14843 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
14844 | } |
14845 | ||
1168df01 JB |
14846 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14847 | language, zero otherwise. */ | |
14848 | static int | |
14849 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14850 | { | |
14851 | static const char vptr[] = "_vptr"; | |
14852 | ||
9c37b5ae TT |
14853 | /* Look for the C++ form of the vtable. */ |
14854 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14855 | return 1; |
14856 | ||
14857 | return 0; | |
14858 | } | |
14859 | ||
c0dd20ea | 14860 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14861 | functions, with the ABI-specified layout. If TYPE describes |
14862 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14863 | |
14864 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14865 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14866 | |
0b92b5bb TT |
14867 | static void |
14868 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14869 | { |
09e2d7c7 | 14870 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14871 | |
14872 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14873 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14874 | return; | |
c0dd20ea DJ |
14875 | |
14876 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14877 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14878 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14879 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14880 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14881 | return; | |
c0dd20ea DJ |
14882 | |
14883 | /* Find the type of the method. */ | |
0b92b5bb | 14884 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14885 | if (pfn_type == NULL |
14886 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14887 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14888 | return; |
c0dd20ea DJ |
14889 | |
14890 | /* Look for the "this" argument. */ | |
14891 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14892 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14893 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14894 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14895 | return; |
c0dd20ea | 14896 | |
09e2d7c7 | 14897 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14898 | new_type = alloc_type (objfile); |
09e2d7c7 | 14899 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14900 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14901 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14902 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14903 | } |
1168df01 | 14904 | |
2b4424c3 TT |
14905 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
14906 | appropriate error checking and issuing complaints if there is a | |
14907 | problem. */ | |
14908 | ||
14909 | static ULONGEST | |
14910 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
14911 | { | |
14912 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
14913 | ||
14914 | if (attr == nullptr) | |
14915 | return 0; | |
14916 | ||
cd6c91b4 | 14917 | if (!attr->form_is_constant ()) |
2b4424c3 | 14918 | { |
b98664d3 | 14919 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
14920 | " - DIE at %s [in module %s]"), |
14921 | sect_offset_str (die->sect_off), | |
14922 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14923 | return 0; | |
14924 | } | |
14925 | ||
14926 | ULONGEST align; | |
14927 | if (attr->form == DW_FORM_sdata) | |
14928 | { | |
14929 | LONGEST val = DW_SND (attr); | |
14930 | if (val < 0) | |
14931 | { | |
b98664d3 | 14932 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
14933 | " - DIE at %s [in module %s]"), |
14934 | sect_offset_str (die->sect_off), | |
14935 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14936 | return 0; | |
14937 | } | |
14938 | align = val; | |
14939 | } | |
14940 | else | |
14941 | align = DW_UNSND (attr); | |
14942 | ||
14943 | if (align == 0) | |
14944 | { | |
b98664d3 | 14945 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
14946 | " - DIE at %s [in module %s]"), |
14947 | sect_offset_str (die->sect_off), | |
14948 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14949 | return 0; | |
14950 | } | |
14951 | if ((align & (align - 1)) != 0) | |
14952 | { | |
b98664d3 | 14953 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
14954 | " - DIE at %s [in module %s]"), |
14955 | sect_offset_str (die->sect_off), | |
14956 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14957 | return 0; | |
14958 | } | |
14959 | ||
14960 | return align; | |
14961 | } | |
14962 | ||
14963 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
14964 | the alignment for TYPE. */ | |
14965 | ||
14966 | static void | |
14967 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
14968 | struct type *type) | |
14969 | { | |
14970 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 14971 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
14972 | " - DIE at %s [in module %s]"), |
14973 | sect_offset_str (die->sect_off), | |
14974 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14975 | } | |
685b1105 | 14976 | |
e35000a7 TBA |
14977 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14978 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
14979 | ||
14980 | static bool | |
14981 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
14982 | { | |
14983 | switch (value) | |
14984 | { | |
14985 | case DW_CC_normal: | |
14986 | case DW_CC_pass_by_reference: | |
14987 | case DW_CC_pass_by_value: | |
14988 | return true; | |
14989 | ||
14990 | default: | |
14991 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 14992 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
14993 | return false; |
14994 | } | |
14995 | } | |
14996 | ||
d0922fcf TBA |
14997 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14998 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
14999 | also according to GNU-specific values (see include/dwarf2.h). */ | |
15000 | ||
15001 | static bool | |
15002 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15003 | { | |
15004 | switch (value) | |
15005 | { | |
15006 | case DW_CC_normal: | |
15007 | case DW_CC_program: | |
15008 | case DW_CC_nocall: | |
15009 | return true; | |
15010 | ||
15011 | case DW_CC_GNU_renesas_sh: | |
15012 | case DW_CC_GNU_borland_fastcall_i386: | |
15013 | case DW_CC_GDB_IBM_OpenCL: | |
15014 | return true; | |
15015 | ||
15016 | default: | |
15017 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15018 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15019 | return false; |
15020 | } | |
15021 | } | |
15022 | ||
c906108c | 15023 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15024 | (definition) to create a type for the structure or union. Fill in |
15025 | the type's name and general properties; the members will not be | |
83655187 DE |
15026 | processed until process_structure_scope. A symbol table entry for |
15027 | the type will also not be done until process_structure_scope (assuming | |
15028 | the type has a name). | |
c906108c | 15029 | |
c767944b DJ |
15030 | NOTE: we need to call these functions regardless of whether or not the |
15031 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15032 | structure or union. This gets the type entered into our set of |
83655187 | 15033 | user defined types. */ |
c906108c | 15034 | |
f792889a | 15035 | static struct type * |
134d01f1 | 15036 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15037 | { |
518817b3 | 15038 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15039 | struct type *type; |
15040 | struct attribute *attr; | |
15d034d0 | 15041 | const char *name; |
c906108c | 15042 | |
348e048f DE |
15043 | /* If the definition of this type lives in .debug_types, read that type. |
15044 | Don't follow DW_AT_specification though, that will take us back up | |
15045 | the chain and we want to go down. */ | |
45e58e77 | 15046 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15047 | if (attr != nullptr) |
348e048f | 15048 | { |
ac9ec31b | 15049 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15050 | |
ac9ec31b | 15051 | /* The type's CU may not be the same as CU. |
02142a6c | 15052 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15053 | return set_die_type (die, type, cu); |
15054 | } | |
15055 | ||
c0dd20ea | 15056 | type = alloc_type (objfile); |
c906108c | 15057 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15058 | |
39cbfefa DJ |
15059 | name = dwarf2_name (die, cu); |
15060 | if (name != NULL) | |
c906108c | 15061 | { |
987504bb | 15062 | if (cu->language == language_cplus |
c44af4eb TT |
15063 | || cu->language == language_d |
15064 | || cu->language == language_rust) | |
63d06c5c | 15065 | { |
15d034d0 | 15066 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15067 | |
15068 | /* dwarf2_full_name might have already finished building the DIE's | |
15069 | type. If so, there is no need to continue. */ | |
15070 | if (get_die_type (die, cu) != NULL) | |
15071 | return get_die_type (die, cu); | |
15072 | ||
e86ca25f | 15073 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15074 | } |
15075 | else | |
15076 | { | |
d8151005 DJ |
15077 | /* The name is already allocated along with this objfile, so |
15078 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15079 | TYPE_NAME (type) = name; |
63d06c5c | 15080 | } |
c906108c SS |
15081 | } |
15082 | ||
15083 | if (die->tag == DW_TAG_structure_type) | |
15084 | { | |
15085 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15086 | } | |
15087 | else if (die->tag == DW_TAG_union_type) | |
15088 | { | |
15089 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15090 | } | |
2ddeaf8a TT |
15091 | else if (die->tag == DW_TAG_variant_part) |
15092 | { | |
15093 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15094 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15095 | } | |
c906108c SS |
15096 | else |
15097 | { | |
4753d33b | 15098 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15099 | } |
15100 | ||
0cc2414c TT |
15101 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15102 | TYPE_DECLARED_CLASS (type) = 1; | |
15103 | ||
e35000a7 TBA |
15104 | /* Store the calling convention in the type if it's available in |
15105 | the die. Otherwise the calling convention remains set to | |
15106 | the default value DW_CC_normal. */ | |
15107 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15108 | if (attr != nullptr | |
15109 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) | |
15110 | { | |
15111 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15112 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
15113 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
15114 | } | |
15115 | ||
e142c38c | 15116 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15117 | if (attr != nullptr) |
c906108c | 15118 | { |
cd6c91b4 | 15119 | if (attr->form_is_constant ()) |
155bfbd3 JB |
15120 | TYPE_LENGTH (type) = DW_UNSND (attr); |
15121 | else | |
15122 | { | |
15123 | /* For the moment, dynamic type sizes are not supported | |
15124 | by GDB's struct type. The actual size is determined | |
15125 | on-demand when resolving the type of a given object, | |
15126 | so set the type's length to zero for now. Otherwise, | |
15127 | we record an expression as the length, and that expression | |
15128 | could lead to a very large value, which could eventually | |
15129 | lead to us trying to allocate that much memory when creating | |
15130 | a value of that type. */ | |
15131 | TYPE_LENGTH (type) = 0; | |
15132 | } | |
c906108c SS |
15133 | } |
15134 | else | |
15135 | { | |
15136 | TYPE_LENGTH (type) = 0; | |
15137 | } | |
15138 | ||
2b4424c3 TT |
15139 | maybe_set_alignment (cu, die, type); |
15140 | ||
5230b05a | 15141 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15142 | { |
5230b05a WT |
15143 | /* ICC<14 does not output the required DW_AT_declaration on |
15144 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15145 | TYPE_STUB (type) = 1; |
685b1105 JK |
15146 | } |
15147 | else | |
15148 | TYPE_STUB_SUPPORTED (type) = 1; | |
15149 | ||
dc718098 | 15150 | if (die_is_declaration (die, cu)) |
876cecd0 | 15151 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15152 | else if (attr == NULL && die->child == NULL |
15153 | && producer_is_realview (cu->producer)) | |
15154 | /* RealView does not output the required DW_AT_declaration | |
15155 | on incomplete types. */ | |
15156 | TYPE_STUB (type) = 1; | |
dc718098 | 15157 | |
c906108c SS |
15158 | /* We need to add the type field to the die immediately so we don't |
15159 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15160 | type within the structure itself. */ |
1c379e20 | 15161 | set_die_type (die, type, cu); |
c906108c | 15162 | |
7e314c57 JK |
15163 | /* set_die_type should be already done. */ |
15164 | set_descriptive_type (type, die, cu); | |
15165 | ||
c767944b DJ |
15166 | return type; |
15167 | } | |
15168 | ||
2ddeaf8a TT |
15169 | /* A helper for process_structure_scope that handles a single member |
15170 | DIE. */ | |
15171 | ||
15172 | static void | |
15173 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15174 | struct field_info *fi, | |
15175 | std::vector<struct symbol *> *template_args, | |
15176 | struct dwarf2_cu *cu) | |
15177 | { | |
15178 | if (child_die->tag == DW_TAG_member | |
15179 | || child_die->tag == DW_TAG_variable | |
15180 | || child_die->tag == DW_TAG_variant_part) | |
15181 | { | |
15182 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15183 | should be a DW_TAG_member that is a declaration, but | |
15184 | all versions of G++ as of this writing (so through at | |
15185 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15186 | tags for them instead. */ | |
15187 | dwarf2_add_field (fi, child_die, cu); | |
15188 | } | |
15189 | else if (child_die->tag == DW_TAG_subprogram) | |
15190 | { | |
15191 | /* Rust doesn't have member functions in the C++ sense. | |
15192 | However, it does emit ordinary functions as children | |
15193 | of a struct DIE. */ | |
15194 | if (cu->language == language_rust) | |
15195 | read_func_scope (child_die, cu); | |
15196 | else | |
15197 | { | |
15198 | /* C++ member function. */ | |
15199 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15200 | } | |
15201 | } | |
15202 | else if (child_die->tag == DW_TAG_inheritance) | |
15203 | { | |
15204 | /* C++ base class field. */ | |
15205 | dwarf2_add_field (fi, child_die, cu); | |
15206 | } | |
15207 | else if (type_can_define_types (child_die)) | |
15208 | dwarf2_add_type_defn (fi, child_die, cu); | |
15209 | else if (child_die->tag == DW_TAG_template_type_param | |
15210 | || child_die->tag == DW_TAG_template_value_param) | |
15211 | { | |
15212 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15213 | ||
15214 | if (arg != NULL) | |
15215 | template_args->push_back (arg); | |
15216 | } | |
15217 | else if (child_die->tag == DW_TAG_variant) | |
15218 | { | |
15219 | /* In a variant we want to get the discriminant and also add a | |
15220 | field for our sole member child. */ | |
15221 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15222 | ||
bde09ab7 | 15223 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
15224 | variant_child != NULL; |
15225 | variant_child = sibling_die (variant_child)) | |
15226 | { | |
15227 | if (variant_child->tag == DW_TAG_member) | |
15228 | { | |
15229 | handle_struct_member_die (variant_child, type, fi, | |
15230 | template_args, cu); | |
15231 | /* Only handle the one. */ | |
15232 | break; | |
15233 | } | |
15234 | } | |
15235 | ||
15236 | /* We don't handle this but we might as well report it if we see | |
15237 | it. */ | |
15238 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15239 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15240 | " - DIE at %s [in module %s]"), |
15241 | sect_offset_str (child_die->sect_off), | |
15242 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15243 | ||
15244 | /* The first field was just added, so we can stash the | |
15245 | discriminant there. */ | |
be2daae6 | 15246 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15247 | if (discr == NULL) |
be2daae6 | 15248 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15249 | else |
be2daae6 | 15250 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
15251 | } |
15252 | } | |
15253 | ||
c767944b DJ |
15254 | /* Finish creating a structure or union type, including filling in |
15255 | its members and creating a symbol for it. */ | |
15256 | ||
15257 | static void | |
15258 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15259 | { | |
518817b3 | 15260 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15261 | struct die_info *child_die; |
c767944b DJ |
15262 | struct type *type; |
15263 | ||
15264 | type = get_die_type (die, cu); | |
15265 | if (type == NULL) | |
15266 | type = read_structure_type (die, cu); | |
15267 | ||
2ddeaf8a TT |
15268 | /* When reading a DW_TAG_variant_part, we need to notice when we |
15269 | read the discriminant member, so we can record it later in the | |
15270 | discriminant_info. */ | |
15271 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
feee869b | 15272 | sect_offset discr_offset {}; |
3e1d3d8c | 15273 | bool has_template_parameters = false; |
2ddeaf8a TT |
15274 | |
15275 | if (is_variant_part) | |
15276 | { | |
15277 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15278 | if (discr == NULL) | |
15279 | { | |
15280 | /* Maybe it's a univariant form, an extension we support. | |
15281 | In this case arrange not to check the offset. */ | |
15282 | is_variant_part = false; | |
15283 | } | |
cd6c91b4 | 15284 | else if (discr->form_is_ref ()) |
2ddeaf8a TT |
15285 | { |
15286 | struct dwarf2_cu *target_cu = cu; | |
15287 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15288 | ||
15289 | discr_offset = target_die->sect_off; | |
15290 | } | |
15291 | else | |
15292 | { | |
b98664d3 | 15293 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
15294 | " - DIE at %s [in module %s]"), |
15295 | sect_offset_str (die->sect_off), | |
15296 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15297 | is_variant_part = false; | |
15298 | } | |
15299 | } | |
15300 | ||
e142c38c | 15301 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15302 | { |
15303 | struct field_info fi; | |
2f4732b0 | 15304 | std::vector<struct symbol *> template_args; |
c906108c | 15305 | |
639d11d3 | 15306 | child_die = die->child; |
c906108c SS |
15307 | |
15308 | while (child_die && child_die->tag) | |
15309 | { | |
2ddeaf8a | 15310 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 15311 | |
2ddeaf8a | 15312 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 15313 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 15314 | |
c906108c SS |
15315 | child_die = sibling_die (child_die); |
15316 | } | |
15317 | ||
34eaf542 | 15318 | /* Attach template arguments to type. */ |
2f4732b0 | 15319 | if (!template_args.empty ()) |
34eaf542 | 15320 | { |
3e1d3d8c | 15321 | has_template_parameters = true; |
34eaf542 | 15322 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15323 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15324 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15325 | = XOBNEWVEC (&objfile->objfile_obstack, |
15326 | struct symbol *, | |
15327 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15328 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15329 | template_args.data (), |
34eaf542 TT |
15330 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15331 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15332 | } |
15333 | ||
c906108c | 15334 | /* Attach fields and member functions to the type. */ |
317f7127 | 15335 | if (fi.nfields () > 0) |
e7c27a73 | 15336 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15337 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15338 | { |
e7c27a73 | 15339 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15340 | |
c5aa993b | 15341 | /* Get the type which refers to the base class (possibly this |
c906108c | 15342 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15343 | class from the DW_AT_containing_type attribute. This use of |
15344 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15345 | |
e142c38c | 15346 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15347 | { |
e7c27a73 | 15348 | struct type *t = die_containing_type (die, cu); |
c906108c | 15349 | |
ae6ae975 | 15350 | set_type_vptr_basetype (type, t); |
c906108c SS |
15351 | if (type == t) |
15352 | { | |
c906108c SS |
15353 | int i; |
15354 | ||
15355 | /* Our own class provides vtbl ptr. */ | |
15356 | for (i = TYPE_NFIELDS (t) - 1; | |
15357 | i >= TYPE_N_BASECLASSES (t); | |
15358 | --i) | |
15359 | { | |
0d5cff50 | 15360 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15361 | |
1168df01 | 15362 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15363 | { |
ae6ae975 | 15364 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15365 | break; |
15366 | } | |
15367 | } | |
15368 | ||
15369 | /* Complain if virtual function table field not found. */ | |
15370 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15371 | complaint (_("virtual function table pointer " |
3e43a32a | 15372 | "not found when defining class '%s'"), |
e86ca25f | 15373 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
15374 | } |
15375 | else | |
15376 | { | |
ae6ae975 | 15377 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15378 | } |
15379 | } | |
f6235d4c | 15380 | else if (cu->producer |
61012eef | 15381 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15382 | { |
15383 | /* The IBM XLC compiler does not provide direct indication | |
15384 | of the containing type, but the vtable pointer is | |
15385 | always named __vfp. */ | |
15386 | ||
15387 | int i; | |
15388 | ||
15389 | for (i = TYPE_NFIELDS (type) - 1; | |
15390 | i >= TYPE_N_BASECLASSES (type); | |
15391 | --i) | |
15392 | { | |
15393 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15394 | { | |
ae6ae975 DE |
15395 | set_type_vptr_fieldno (type, i); |
15396 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15397 | break; |
15398 | } | |
15399 | } | |
15400 | } | |
c906108c | 15401 | } |
98751a41 JK |
15402 | |
15403 | /* Copy fi.typedef_field_list linked list elements content into the | |
15404 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15405 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15406 | { |
be2daae6 | 15407 | int count = fi.typedef_field_list.size (); |
98751a41 | 15408 | |
a0d7a4ff | 15409 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15410 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15411 | = ((struct decl_field *) |
be2daae6 TT |
15412 | TYPE_ALLOC (type, |
15413 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15414 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15415 | |
be2daae6 TT |
15416 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15417 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15418 | } |
c767944b | 15419 | |
883fd55a KS |
15420 | /* Copy fi.nested_types_list linked list elements content into the |
15421 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15422 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15423 | { |
be2daae6 | 15424 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15425 | |
15426 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15427 | TYPE_NESTED_TYPES_ARRAY (type) | |
15428 | = ((struct decl_field *) | |
be2daae6 TT |
15429 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15430 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15431 | |
be2daae6 TT |
15432 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15433 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15434 | } |
c906108c | 15435 | } |
63d06c5c | 15436 | |
bb5ed363 | 15437 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15438 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15439 | cu->rust_unions.push_back (type); | |
0b92b5bb | 15440 | |
90aeadfc DC |
15441 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15442 | snapshots) has been known to create a die giving a declaration | |
15443 | for a class that has, as a child, a die giving a definition for a | |
15444 | nested class. So we have to process our children even if the | |
15445 | current die is a declaration. Normally, of course, a declaration | |
15446 | won't have any children at all. */ | |
134d01f1 | 15447 | |
ca040673 DE |
15448 | child_die = die->child; |
15449 | ||
90aeadfc DC |
15450 | while (child_die != NULL && child_die->tag) |
15451 | { | |
15452 | if (child_die->tag == DW_TAG_member | |
15453 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15454 | || child_die->tag == DW_TAG_inheritance |
15455 | || child_die->tag == DW_TAG_template_value_param | |
15456 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15457 | { |
90aeadfc | 15458 | /* Do nothing. */ |
134d01f1 | 15459 | } |
90aeadfc DC |
15460 | else |
15461 | process_die (child_die, cu); | |
134d01f1 | 15462 | |
90aeadfc | 15463 | child_die = sibling_die (child_die); |
134d01f1 DJ |
15464 | } |
15465 | ||
fa4028e9 JB |
15466 | /* Do not consider external references. According to the DWARF standard, |
15467 | these DIEs are identified by the fact that they have no byte_size | |
15468 | attribute, and a declaration attribute. */ | |
15469 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15470 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
15471 | { |
15472 | struct symbol *sym = new_symbol (die, type, cu); | |
15473 | ||
15474 | if (has_template_parameters) | |
15475 | { | |
a776957c TT |
15476 | struct symtab *symtab; |
15477 | if (sym != nullptr) | |
15478 | symtab = symbol_symtab (sym); | |
15479 | else if (cu->line_header != nullptr) | |
15480 | { | |
15481 | /* Any related symtab will do. */ | |
15482 | symtab | |
7ba99d21 | 15483 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15484 | } |
15485 | else | |
15486 | { | |
15487 | symtab = nullptr; | |
15488 | complaint (_("could not find suitable " | |
15489 | "symtab for template parameter" | |
15490 | " - DIE at %s [in module %s]"), | |
15491 | sect_offset_str (die->sect_off), | |
15492 | objfile_name (objfile)); | |
15493 | } | |
15494 | ||
15495 | if (symtab != nullptr) | |
15496 | { | |
15497 | /* Make sure that the symtab is set on the new symbols. | |
15498 | Even though they don't appear in this symtab directly, | |
15499 | other parts of gdb assume that symbols do, and this is | |
15500 | reasonably true. */ | |
15501 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15502 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15503 | } | |
3e1d3d8c TT |
15504 | } |
15505 | } | |
134d01f1 DJ |
15506 | } |
15507 | ||
55426c9d JB |
15508 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
15509 | update TYPE using some information only available in DIE's children. */ | |
15510 | ||
15511 | static void | |
15512 | update_enumeration_type_from_children (struct die_info *die, | |
15513 | struct type *type, | |
15514 | struct dwarf2_cu *cu) | |
15515 | { | |
60f7655a | 15516 | struct die_info *child_die; |
55426c9d JB |
15517 | int unsigned_enum = 1; |
15518 | int flag_enum = 1; | |
55426c9d | 15519 | |
8268c778 | 15520 | auto_obstack obstack; |
55426c9d | 15521 | |
60f7655a DE |
15522 | for (child_die = die->child; |
15523 | child_die != NULL && child_die->tag; | |
15524 | child_die = sibling_die (child_die)) | |
55426c9d JB |
15525 | { |
15526 | struct attribute *attr; | |
15527 | LONGEST value; | |
15528 | const gdb_byte *bytes; | |
15529 | struct dwarf2_locexpr_baton *baton; | |
15530 | const char *name; | |
60f7655a | 15531 | |
55426c9d JB |
15532 | if (child_die->tag != DW_TAG_enumerator) |
15533 | continue; | |
15534 | ||
15535 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
15536 | if (attr == NULL) | |
15537 | continue; | |
15538 | ||
15539 | name = dwarf2_name (child_die, cu); | |
15540 | if (name == NULL) | |
15541 | name = "<anonymous enumerator>"; | |
15542 | ||
15543 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
15544 | &value, &bytes, &baton); | |
15545 | if (value < 0) | |
15546 | { | |
15547 | unsigned_enum = 0; | |
15548 | flag_enum = 0; | |
15549 | } | |
55426c9d | 15550 | else |
edd45eb0 SM |
15551 | { |
15552 | if (count_one_bits_ll (value) >= 2) | |
15553 | flag_enum = 0; | |
edd45eb0 | 15554 | } |
55426c9d JB |
15555 | |
15556 | /* If we already know that the enum type is neither unsigned, nor | |
15557 | a flag type, no need to look at the rest of the enumerates. */ | |
15558 | if (!unsigned_enum && !flag_enum) | |
15559 | break; | |
55426c9d JB |
15560 | } |
15561 | ||
15562 | if (unsigned_enum) | |
15563 | TYPE_UNSIGNED (type) = 1; | |
15564 | if (flag_enum) | |
15565 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
15566 | } |
15567 | ||
134d01f1 DJ |
15568 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
15569 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 15570 | |
f792889a | 15571 | static struct type * |
134d01f1 | 15572 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15573 | { |
518817b3 | 15574 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15575 | struct type *type; |
c906108c | 15576 | struct attribute *attr; |
0114d602 | 15577 | const char *name; |
134d01f1 | 15578 | |
348e048f DE |
15579 | /* If the definition of this type lives in .debug_types, read that type. |
15580 | Don't follow DW_AT_specification though, that will take us back up | |
15581 | the chain and we want to go down. */ | |
45e58e77 | 15582 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15583 | if (attr != nullptr) |
348e048f | 15584 | { |
ac9ec31b | 15585 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15586 | |
ac9ec31b | 15587 | /* The type's CU may not be the same as CU. |
02142a6c | 15588 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15589 | return set_die_type (die, type, cu); |
15590 | } | |
15591 | ||
c906108c SS |
15592 | type = alloc_type (objfile); |
15593 | ||
15594 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 15595 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 15596 | if (name != NULL) |
e86ca25f | 15597 | TYPE_NAME (type) = name; |
c906108c | 15598 | |
0626fc76 TT |
15599 | attr = dwarf2_attr (die, DW_AT_type, cu); |
15600 | if (attr != NULL) | |
15601 | { | |
15602 | struct type *underlying_type = die_type (die, cu); | |
15603 | ||
15604 | TYPE_TARGET_TYPE (type) = underlying_type; | |
15605 | } | |
15606 | ||
e142c38c | 15607 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15608 | if (attr != nullptr) |
c906108c SS |
15609 | { |
15610 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15611 | } | |
15612 | else | |
15613 | { | |
15614 | TYPE_LENGTH (type) = 0; | |
15615 | } | |
15616 | ||
2b4424c3 TT |
15617 | maybe_set_alignment (cu, die, type); |
15618 | ||
137033e9 JB |
15619 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
15620 | declared as private in the package spec, and then defined only | |
15621 | inside the package body. Such types are known as Taft Amendment | |
15622 | Types. When another package uses such a type, an incomplete DIE | |
15623 | may be generated by the compiler. */ | |
02eb380e | 15624 | if (die_is_declaration (die, cu)) |
876cecd0 | 15625 | TYPE_STUB (type) = 1; |
02eb380e | 15626 | |
0626fc76 TT |
15627 | /* Finish the creation of this type by using the enum's children. |
15628 | We must call this even when the underlying type has been provided | |
15629 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
15630 | update_enumeration_type_from_children (die, type, cu); |
15631 | ||
0626fc76 TT |
15632 | /* If this type has an underlying type that is not a stub, then we |
15633 | may use its attributes. We always use the "unsigned" attribute | |
15634 | in this situation, because ordinarily we guess whether the type | |
15635 | is unsigned -- but the guess can be wrong and the underlying type | |
15636 | can tell us the reality. However, we defer to a local size | |
15637 | attribute if one exists, because this lets the compiler override | |
15638 | the underlying type if needed. */ | |
15639 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
15640 | { | |
15641 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
15642 | if (TYPE_LENGTH (type) == 0) | |
15643 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
15644 | if (TYPE_RAW_ALIGN (type) == 0 |
15645 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
15646 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
15647 | } |
15648 | ||
3d567982 TT |
15649 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
15650 | ||
f792889a | 15651 | return set_die_type (die, type, cu); |
134d01f1 DJ |
15652 | } |
15653 | ||
15654 | /* Given a pointer to a die which begins an enumeration, process all | |
15655 | the dies that define the members of the enumeration, and create the | |
15656 | symbol for the enumeration type. | |
15657 | ||
15658 | NOTE: We reverse the order of the element list. */ | |
15659 | ||
15660 | static void | |
15661 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15662 | { | |
f792889a | 15663 | struct type *this_type; |
134d01f1 | 15664 | |
f792889a DJ |
15665 | this_type = get_die_type (die, cu); |
15666 | if (this_type == NULL) | |
15667 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 15668 | |
639d11d3 | 15669 | if (die->child != NULL) |
c906108c | 15670 | { |
9dc481d3 DE |
15671 | struct die_info *child_die; |
15672 | struct symbol *sym; | |
43816ebc | 15673 | std::vector<struct field> fields; |
15d034d0 | 15674 | const char *name; |
9dc481d3 | 15675 | |
639d11d3 | 15676 | child_die = die->child; |
c906108c SS |
15677 | while (child_die && child_die->tag) |
15678 | { | |
15679 | if (child_die->tag != DW_TAG_enumerator) | |
15680 | { | |
e7c27a73 | 15681 | process_die (child_die, cu); |
c906108c SS |
15682 | } |
15683 | else | |
15684 | { | |
39cbfefa DJ |
15685 | name = dwarf2_name (child_die, cu); |
15686 | if (name) | |
c906108c | 15687 | { |
f792889a | 15688 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 15689 | |
43816ebc TT |
15690 | fields.emplace_back (); |
15691 | struct field &field = fields.back (); | |
c906108c | 15692 | |
43816ebc TT |
15693 | FIELD_NAME (field) = sym->linkage_name (); |
15694 | FIELD_TYPE (field) = NULL; | |
15695 | SET_FIELD_ENUMVAL (field, SYMBOL_VALUE (sym)); | |
15696 | FIELD_BITSIZE (field) = 0; | |
c906108c SS |
15697 | } |
15698 | } | |
15699 | ||
15700 | child_die = sibling_die (child_die); | |
15701 | } | |
15702 | ||
43816ebc | 15703 | if (!fields.empty ()) |
c906108c | 15704 | { |
43816ebc | 15705 | TYPE_NFIELDS (this_type) = fields.size (); |
f792889a | 15706 | TYPE_FIELDS (this_type) = (struct field *) |
43816ebc TT |
15707 | TYPE_ALLOC (this_type, sizeof (struct field) * fields.size ()); |
15708 | memcpy (TYPE_FIELDS (this_type), fields.data (), | |
15709 | sizeof (struct field) * fields.size ()); | |
c906108c | 15710 | } |
c906108c | 15711 | } |
134d01f1 | 15712 | |
6c83ed52 TT |
15713 | /* If we are reading an enum from a .debug_types unit, and the enum |
15714 | is a declaration, and the enum is not the signatured type in the | |
15715 | unit, then we do not want to add a symbol for it. Adding a | |
15716 | symbol would in some cases obscure the true definition of the | |
15717 | enum, giving users an incomplete type when the definition is | |
15718 | actually available. Note that we do not want to do this for all | |
15719 | enums which are just declarations, because C++0x allows forward | |
15720 | enum declarations. */ | |
3019eac3 | 15721 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15722 | && die_is_declaration (die, cu)) |
15723 | { | |
52dc124a | 15724 | struct signatured_type *sig_type; |
6c83ed52 | 15725 | |
c0f78cd4 | 15726 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15727 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15728 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15729 | return; |
15730 | } | |
15731 | ||
f792889a | 15732 | new_symbol (die, this_type, cu); |
c906108c SS |
15733 | } |
15734 | ||
15735 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15736 | the DIE's type field. For now, this only handles one dimensional | |
15737 | arrays. */ | |
15738 | ||
f792889a | 15739 | static struct type * |
e7c27a73 | 15740 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15741 | { |
518817b3 | 15742 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15743 | struct die_info *child_die; |
7e314c57 | 15744 | struct type *type; |
c906108c | 15745 | struct type *element_type, *range_type, *index_type; |
c906108c | 15746 | struct attribute *attr; |
15d034d0 | 15747 | const char *name; |
a405673c | 15748 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 15749 | unsigned int bit_stride = 0; |
c906108c | 15750 | |
e7c27a73 | 15751 | element_type = die_type (die, cu); |
c906108c | 15752 | |
7e314c57 JK |
15753 | /* The die_type call above may have already set the type for this DIE. */ |
15754 | type = get_die_type (die, cu); | |
15755 | if (type) | |
15756 | return type; | |
15757 | ||
dc53a7ad JB |
15758 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15759 | if (attr != NULL) | |
a405673c JB |
15760 | { |
15761 | int stride_ok; | |
09ba997f | 15762 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
a405673c JB |
15763 | |
15764 | byte_stride_prop | |
15765 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
15766 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
15767 | prop_type); | |
a405673c JB |
15768 | if (!stride_ok) |
15769 | { | |
b98664d3 | 15770 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
15771 | " - DIE at %s [in module %s]"), |
15772 | sect_offset_str (die->sect_off), | |
518817b3 | 15773 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
15774 | /* Ignore this attribute. We will likely not be able to print |
15775 | arrays of this type correctly, but there is little we can do | |
15776 | to help if we cannot read the attribute's value. */ | |
15777 | byte_stride_prop = NULL; | |
15778 | } | |
15779 | } | |
dc53a7ad JB |
15780 | |
15781 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15782 | if (attr != NULL) | |
15783 | bit_stride = DW_UNSND (attr); | |
15784 | ||
c906108c SS |
15785 | /* Irix 6.2 native cc creates array types without children for |
15786 | arrays with unspecified length. */ | |
639d11d3 | 15787 | if (die->child == NULL) |
c906108c | 15788 | { |
46bf5051 | 15789 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15790 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 15791 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 15792 | byte_stride_prop, bit_stride); |
f792889a | 15793 | return set_die_type (die, type, cu); |
c906108c SS |
15794 | } |
15795 | ||
791afaa2 | 15796 | std::vector<struct type *> range_types; |
639d11d3 | 15797 | child_die = die->child; |
c906108c SS |
15798 | while (child_die && child_die->tag) |
15799 | { | |
15800 | if (child_die->tag == DW_TAG_subrange_type) | |
15801 | { | |
f792889a | 15802 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15803 | |
f792889a | 15804 | if (child_type != NULL) |
a02abb62 | 15805 | { |
0963b4bd MS |
15806 | /* The range type was succesfully read. Save it for the |
15807 | array type creation. */ | |
791afaa2 | 15808 | range_types.push_back (child_type); |
a02abb62 | 15809 | } |
c906108c SS |
15810 | } |
15811 | child_die = sibling_die (child_die); | |
15812 | } | |
15813 | ||
15814 | /* Dwarf2 dimensions are output from left to right, create the | |
15815 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15816 | |
c906108c | 15817 | type = element_type; |
7ca2d3a3 DL |
15818 | |
15819 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15820 | { | |
15821 | int i = 0; | |
9a619af0 | 15822 | |
791afaa2 | 15823 | while (i < range_types.size ()) |
dc53a7ad | 15824 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 15825 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
15826 | } |
15827 | else | |
15828 | { | |
791afaa2 | 15829 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15830 | while (ndim-- > 0) |
dc53a7ad | 15831 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 15832 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 15833 | } |
c906108c | 15834 | |
f5f8a009 EZ |
15835 | /* Understand Dwarf2 support for vector types (like they occur on |
15836 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15837 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15838 | custom vendor extension. The main difference between a regular | |
15839 | array and the vector variant is that vectors are passed by value | |
15840 | to functions. */ | |
e142c38c | 15841 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 15842 | if (attr != nullptr) |
ea37ba09 | 15843 | make_vector_type (type); |
f5f8a009 | 15844 | |
dbc98a8b KW |
15845 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15846 | implementation may choose to implement triple vectors using this | |
15847 | attribute. */ | |
15848 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15849 | if (attr != nullptr) |
dbc98a8b KW |
15850 | { |
15851 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15852 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15853 | else | |
b98664d3 | 15854 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 15855 | "than the total size of elements")); |
dbc98a8b KW |
15856 | } |
15857 | ||
39cbfefa DJ |
15858 | name = dwarf2_name (die, cu); |
15859 | if (name) | |
15860 | TYPE_NAME (type) = name; | |
6e70227d | 15861 | |
2b4424c3 TT |
15862 | maybe_set_alignment (cu, die, type); |
15863 | ||
0963b4bd | 15864 | /* Install the type in the die. */ |
7e314c57 JK |
15865 | set_die_type (die, type, cu); |
15866 | ||
15867 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15868 | set_descriptive_type (type, die, cu); |
15869 | ||
7e314c57 | 15870 | return type; |
c906108c SS |
15871 | } |
15872 | ||
7ca2d3a3 | 15873 | static enum dwarf_array_dim_ordering |
6e70227d | 15874 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15875 | { |
15876 | struct attribute *attr; | |
15877 | ||
15878 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15879 | ||
435d3d88 | 15880 | if (attr != nullptr) |
aead7601 | 15881 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
7ca2d3a3 | 15882 | |
0963b4bd MS |
15883 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15884 | opposite order to the dwarf2 specification, but data is still | |
15885 | laid out as per normal fortran. | |
7ca2d3a3 | 15886 | |
0963b4bd MS |
15887 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15888 | version checking. */ | |
7ca2d3a3 | 15889 | |
905e0470 PM |
15890 | if (cu->language == language_fortran |
15891 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15892 | { |
15893 | return DW_ORD_row_major; | |
15894 | } | |
15895 | ||
6e70227d | 15896 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15897 | { |
15898 | case array_column_major: | |
15899 | return DW_ORD_col_major; | |
15900 | case array_row_major: | |
15901 | default: | |
15902 | return DW_ORD_row_major; | |
15903 | }; | |
15904 | } | |
15905 | ||
72019c9c | 15906 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15907 | the DIE's type field. */ |
72019c9c | 15908 | |
f792889a | 15909 | static struct type * |
72019c9c GM |
15910 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15911 | { | |
7e314c57 JK |
15912 | struct type *domain_type, *set_type; |
15913 | struct attribute *attr; | |
f792889a | 15914 | |
7e314c57 JK |
15915 | domain_type = die_type (die, cu); |
15916 | ||
15917 | /* The die_type call above may have already set the type for this DIE. */ | |
15918 | set_type = get_die_type (die, cu); | |
15919 | if (set_type) | |
15920 | return set_type; | |
15921 | ||
15922 | set_type = create_set_type (NULL, domain_type); | |
15923 | ||
15924 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15925 | if (attr != nullptr) |
d09039dd | 15926 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
7e314c57 | 15927 | |
2b4424c3 TT |
15928 | maybe_set_alignment (cu, die, set_type); |
15929 | ||
f792889a | 15930 | return set_die_type (die, set_type, cu); |
72019c9c | 15931 | } |
7ca2d3a3 | 15932 | |
0971de02 TT |
15933 | /* A helper for read_common_block that creates a locexpr baton. |
15934 | SYM is the symbol which we are marking as computed. | |
15935 | COMMON_DIE is the DIE for the common block. | |
15936 | COMMON_LOC is the location expression attribute for the common | |
15937 | block itself. | |
15938 | MEMBER_LOC is the location expression attribute for the particular | |
15939 | member of the common block that we are processing. | |
15940 | CU is the CU from which the above come. */ | |
15941 | ||
15942 | static void | |
15943 | mark_common_block_symbol_computed (struct symbol *sym, | |
15944 | struct die_info *common_die, | |
15945 | struct attribute *common_loc, | |
15946 | struct attribute *member_loc, | |
15947 | struct dwarf2_cu *cu) | |
15948 | { | |
518817b3 SM |
15949 | struct dwarf2_per_objfile *dwarf2_per_objfile |
15950 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
15951 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
15952 | struct dwarf2_locexpr_baton *baton; | |
15953 | gdb_byte *ptr; | |
15954 | unsigned int cu_off; | |
15955 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15956 | LONGEST offset = 0; | |
15957 | ||
15958 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
15959 | gdb_assert (common_loc->form_is_block ()); |
15960 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 15961 | || member_loc->form_is_constant ()); |
0971de02 | 15962 | |
8d749320 | 15963 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15964 | baton->per_cu = cu->per_cu; |
15965 | gdb_assert (baton->per_cu); | |
15966 | ||
15967 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15968 | ||
cd6c91b4 | 15969 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15970 | { |
15971 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15972 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15973 | } | |
15974 | else | |
15975 | baton->size += DW_BLOCK (member_loc)->size; | |
15976 | ||
224c3ddb | 15977 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15978 | baton->data = ptr; |
15979 | ||
15980 | *ptr++ = DW_OP_call4; | |
9c541725 | 15981 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15982 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15983 | ptr += 4; | |
15984 | ||
cd6c91b4 | 15985 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15986 | { |
15987 | *ptr++ = DW_OP_addr; | |
15988 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15989 | ptr += cu->header.addr_size; | |
15990 | } | |
15991 | else | |
15992 | { | |
15993 | /* We have to copy the data here, because DW_OP_call4 will only | |
15994 | use a DW_AT_location attribute. */ | |
15995 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15996 | ptr += DW_BLOCK (member_loc)->size; | |
15997 | } | |
15998 | ||
15999 | *ptr++ = DW_OP_plus; | |
16000 | gdb_assert (ptr - baton->data == baton->size); | |
16001 | ||
0971de02 | 16002 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16003 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16004 | } |
16005 | ||
4357ac6c TT |
16006 | /* Create appropriate locally-scoped variables for all the |
16007 | DW_TAG_common_block entries. Also create a struct common_block | |
16008 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16009 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16010 | variable names. */ |
c906108c SS |
16011 | |
16012 | static void | |
e7c27a73 | 16013 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16014 | { |
0971de02 TT |
16015 | struct attribute *attr; |
16016 | ||
16017 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16018 | if (attr != nullptr) |
0971de02 TT |
16019 | { |
16020 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16021 | if (attr->form_is_block ()) |
0971de02 TT |
16022 | { |
16023 | /* Ok. */ | |
16024 | } | |
cd6c91b4 | 16025 | else if (attr->form_is_section_offset ()) |
0971de02 TT |
16026 | { |
16027 | dwarf2_complex_location_expr_complaint (); | |
16028 | attr = NULL; | |
16029 | } | |
16030 | else | |
16031 | { | |
16032 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16033 | "common block member"); | |
16034 | attr = NULL; | |
16035 | } | |
16036 | } | |
16037 | ||
639d11d3 | 16038 | if (die->child != NULL) |
c906108c | 16039 | { |
518817b3 | 16040 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16041 | struct die_info *child_die; |
16042 | size_t n_entries = 0, size; | |
16043 | struct common_block *common_block; | |
16044 | struct symbol *sym; | |
74ac6d43 | 16045 | |
4357ac6c TT |
16046 | for (child_die = die->child; |
16047 | child_die && child_die->tag; | |
16048 | child_die = sibling_die (child_die)) | |
16049 | ++n_entries; | |
16050 | ||
16051 | size = (sizeof (struct common_block) | |
16052 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16053 | common_block |
16054 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16055 | size); | |
4357ac6c TT |
16056 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16057 | common_block->n_entries = 0; | |
16058 | ||
16059 | for (child_die = die->child; | |
16060 | child_die && child_die->tag; | |
16061 | child_die = sibling_die (child_die)) | |
16062 | { | |
16063 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16064 | symbol scope. */ | |
e7c27a73 | 16065 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16066 | if (sym != NULL) |
16067 | { | |
16068 | struct attribute *member_loc; | |
16069 | ||
16070 | common_block->contents[common_block->n_entries++] = sym; | |
16071 | ||
16072 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16073 | cu); | |
16074 | if (member_loc) | |
16075 | { | |
16076 | /* GDB has handled this for a long time, but it is | |
16077 | not specified by DWARF. It seems to have been | |
16078 | emitted by gfortran at least as recently as: | |
16079 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16080 | complaint (_("Variable in common block has " |
0971de02 | 16081 | "DW_AT_data_member_location " |
9d8780f0 SM |
16082 | "- DIE at %s [in module %s]"), |
16083 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16084 | objfile_name (objfile)); |
0971de02 | 16085 | |
cd6c91b4 | 16086 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16087 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16088 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16089 | || member_loc->form_is_block ()) |
0971de02 | 16090 | { |
435d3d88 | 16091 | if (attr != nullptr) |
0971de02 TT |
16092 | mark_common_block_symbol_computed (sym, die, attr, |
16093 | member_loc, cu); | |
16094 | } | |
16095 | else | |
16096 | dwarf2_complex_location_expr_complaint (); | |
16097 | } | |
16098 | } | |
c906108c | 16099 | } |
4357ac6c TT |
16100 | |
16101 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16102 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16103 | } |
16104 | } | |
16105 | ||
0114d602 | 16106 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16107 | |
0114d602 DJ |
16108 | static struct type * |
16109 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16110 | { |
518817b3 | 16111 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16112 | const char *previous_prefix, *name; |
9219021c | 16113 | int is_anonymous; |
0114d602 DJ |
16114 | struct type *type; |
16115 | ||
16116 | /* For extensions, reuse the type of the original namespace. */ | |
16117 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16118 | { | |
16119 | struct die_info *ext_die; | |
16120 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16121 | |
0114d602 DJ |
16122 | ext_die = dwarf2_extension (die, &ext_cu); |
16123 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16124 | |
16125 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16126 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16127 | return set_die_type (die, type, cu); |
16128 | } | |
9219021c | 16129 | |
e142c38c | 16130 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16131 | |
16132 | /* Now build the name of the current namespace. */ | |
16133 | ||
0114d602 DJ |
16134 | previous_prefix = determine_prefix (die, cu); |
16135 | if (previous_prefix[0] != '\0') | |
16136 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16137 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16138 | |
16139 | /* Create the type. */ | |
19f392bc | 16140 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16141 | |
60531b24 | 16142 | return set_die_type (die, type, cu); |
0114d602 DJ |
16143 | } |
16144 | ||
22cee43f | 16145 | /* Read a namespace scope. */ |
0114d602 DJ |
16146 | |
16147 | static void | |
16148 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16149 | { | |
518817b3 | 16150 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16151 | int is_anonymous; |
9219021c | 16152 | |
5c4e30ca DC |
16153 | /* Add a symbol associated to this if we haven't seen the namespace |
16154 | before. Also, add a using directive if it's an anonymous | |
16155 | namespace. */ | |
9219021c | 16156 | |
f2f0e013 | 16157 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16158 | { |
16159 | struct type *type; | |
16160 | ||
0114d602 | 16161 | type = read_type_die (die, cu); |
e7c27a73 | 16162 | new_symbol (die, type, cu); |
5c4e30ca | 16163 | |
e8e80198 | 16164 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16165 | if (is_anonymous) |
0114d602 DJ |
16166 | { |
16167 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16168 | |
eb1e02fd | 16169 | std::vector<const char *> excludes; |
804d2729 | 16170 | add_using_directive (using_directives (cu), |
22cee43f | 16171 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16172 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16173 | } |
5c4e30ca | 16174 | } |
9219021c | 16175 | |
639d11d3 | 16176 | if (die->child != NULL) |
d9fa45fe | 16177 | { |
639d11d3 | 16178 | struct die_info *child_die = die->child; |
6e70227d | 16179 | |
d9fa45fe DC |
16180 | while (child_die && child_die->tag) |
16181 | { | |
e7c27a73 | 16182 | process_die (child_die, cu); |
d9fa45fe DC |
16183 | child_die = sibling_die (child_die); |
16184 | } | |
16185 | } | |
38d518c9 EZ |
16186 | } |
16187 | ||
f55ee35c JK |
16188 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16189 | imported module. Still we need that type as local Fortran "use ... only" | |
16190 | declaration imports depend on the created type in determine_prefix. */ | |
16191 | ||
16192 | static struct type * | |
16193 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16194 | { | |
518817b3 | 16195 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16196 | const char *module_name; |
f55ee35c JK |
16197 | struct type *type; |
16198 | ||
16199 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16200 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16201 | |
f55ee35c JK |
16202 | return set_die_type (die, type, cu); |
16203 | } | |
16204 | ||
5d7cb8df JK |
16205 | /* Read a Fortran module. */ |
16206 | ||
16207 | static void | |
16208 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16209 | { | |
16210 | struct die_info *child_die = die->child; | |
530e8392 KB |
16211 | struct type *type; |
16212 | ||
16213 | type = read_type_die (die, cu); | |
16214 | new_symbol (die, type, cu); | |
5d7cb8df | 16215 | |
5d7cb8df JK |
16216 | while (child_die && child_die->tag) |
16217 | { | |
16218 | process_die (child_die, cu); | |
16219 | child_die = sibling_die (child_die); | |
16220 | } | |
16221 | } | |
16222 | ||
38d518c9 EZ |
16223 | /* Return the name of the namespace represented by DIE. Set |
16224 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16225 | namespace. */ | |
16226 | ||
16227 | static const char * | |
e142c38c | 16228 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16229 | { |
16230 | struct die_info *current_die; | |
16231 | const char *name = NULL; | |
16232 | ||
16233 | /* Loop through the extensions until we find a name. */ | |
16234 | ||
16235 | for (current_die = die; | |
16236 | current_die != NULL; | |
f2f0e013 | 16237 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16238 | { |
96553a0c DE |
16239 | /* We don't use dwarf2_name here so that we can detect the absence |
16240 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16241 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16242 | |
38d518c9 EZ |
16243 | if (name != NULL) |
16244 | break; | |
16245 | } | |
16246 | ||
16247 | /* Is it an anonymous namespace? */ | |
16248 | ||
16249 | *is_anonymous = (name == NULL); | |
16250 | if (*is_anonymous) | |
2b1dbab0 | 16251 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16252 | |
16253 | return name; | |
d9fa45fe DC |
16254 | } |
16255 | ||
c906108c SS |
16256 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16257 | the user defined type vector. */ | |
16258 | ||
f792889a | 16259 | static struct type * |
e7c27a73 | 16260 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16261 | { |
518817b3 SM |
16262 | struct gdbarch *gdbarch |
16263 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 16264 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16265 | struct type *type; |
8b2dbe47 KB |
16266 | struct attribute *attr_byte_size; |
16267 | struct attribute *attr_address_class; | |
16268 | int byte_size, addr_class; | |
7e314c57 JK |
16269 | struct type *target_type; |
16270 | ||
16271 | target_type = die_type (die, cu); | |
c906108c | 16272 | |
7e314c57 JK |
16273 | /* The die_type call above may have already set the type for this DIE. */ |
16274 | type = get_die_type (die, cu); | |
16275 | if (type) | |
16276 | return type; | |
16277 | ||
16278 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16279 | |
e142c38c | 16280 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16281 | if (attr_byte_size) |
16282 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16283 | else |
8b2dbe47 KB |
16284 | byte_size = cu_header->addr_size; |
16285 | ||
e142c38c | 16286 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16287 | if (attr_address_class) |
16288 | addr_class = DW_UNSND (attr_address_class); | |
16289 | else | |
16290 | addr_class = DW_ADDR_none; | |
16291 | ||
2b4424c3 TT |
16292 | ULONGEST alignment = get_alignment (cu, die); |
16293 | ||
16294 | /* If the pointer size, alignment, or address class is different | |
16295 | than the default, create a type variant marked as such and set | |
16296 | the length accordingly. */ | |
16297 | if (TYPE_LENGTH (type) != byte_size | |
16298 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16299 | && alignment != TYPE_RAW_ALIGN (type)) | |
16300 | || addr_class != DW_ADDR_none) | |
c906108c | 16301 | { |
5e2b427d | 16302 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16303 | { |
16304 | int type_flags; | |
16305 | ||
849957d9 | 16306 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16307 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16308 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16309 | == 0); | |
8b2dbe47 KB |
16310 | type = make_type_with_address_space (type, type_flags); |
16311 | } | |
16312 | else if (TYPE_LENGTH (type) != byte_size) | |
16313 | { | |
b98664d3 | 16314 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 16315 | } |
2b4424c3 TT |
16316 | else if (TYPE_RAW_ALIGN (type) != alignment) |
16317 | { | |
b98664d3 | 16318 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
16319 | " - DIE at %s [in module %s]"), |
16320 | sect_offset_str (die->sect_off), | |
16321 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16322 | } | |
6e70227d | 16323 | else |
9a619af0 MS |
16324 | { |
16325 | /* Should we also complain about unhandled address classes? */ | |
16326 | } | |
c906108c | 16327 | } |
8b2dbe47 KB |
16328 | |
16329 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 16330 | set_type_align (type, alignment); |
f792889a | 16331 | return set_die_type (die, type, cu); |
c906108c SS |
16332 | } |
16333 | ||
16334 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16335 | the user defined type vector. */ | |
16336 | ||
f792889a | 16337 | static struct type * |
e7c27a73 | 16338 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16339 | { |
16340 | struct type *type; | |
16341 | struct type *to_type; | |
16342 | struct type *domain; | |
16343 | ||
e7c27a73 DJ |
16344 | to_type = die_type (die, cu); |
16345 | domain = die_containing_type (die, cu); | |
0d5de010 | 16346 | |
7e314c57 JK |
16347 | /* The calls above may have already set the type for this DIE. */ |
16348 | type = get_die_type (die, cu); | |
16349 | if (type) | |
16350 | return type; | |
16351 | ||
0d5de010 DJ |
16352 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
16353 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
16354 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
16355 | { | |
518817b3 SM |
16356 | struct type *new_type |
16357 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
16358 | |
16359 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16360 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16361 | TYPE_VARARGS (to_type)); | |
16362 | type = lookup_methodptr_type (new_type); | |
16363 | } | |
0d5de010 DJ |
16364 | else |
16365 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16366 | |
f792889a | 16367 | return set_die_type (die, type, cu); |
c906108c SS |
16368 | } |
16369 | ||
4297a3f0 | 16370 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16371 | the user defined type vector. */ |
16372 | ||
f792889a | 16373 | static struct type * |
4297a3f0 AV |
16374 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16375 | enum type_code refcode) | |
c906108c | 16376 | { |
e7c27a73 | 16377 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16378 | struct type *type, *target_type; |
c906108c SS |
16379 | struct attribute *attr; |
16380 | ||
4297a3f0 AV |
16381 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16382 | ||
7e314c57 JK |
16383 | target_type = die_type (die, cu); |
16384 | ||
16385 | /* The die_type call above may have already set the type for this DIE. */ | |
16386 | type = get_die_type (die, cu); | |
16387 | if (type) | |
16388 | return type; | |
16389 | ||
4297a3f0 | 16390 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16391 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16392 | if (attr != nullptr) |
c906108c SS |
16393 | { |
16394 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16395 | } | |
16396 | else | |
16397 | { | |
107d2387 | 16398 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16399 | } |
2b4424c3 | 16400 | maybe_set_alignment (cu, die, type); |
f792889a | 16401 | return set_die_type (die, type, cu); |
c906108c SS |
16402 | } |
16403 | ||
cf363f18 MW |
16404 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16405 | outputs DWARF type qualifiers that apply to an array, not the | |
16406 | element type. But GDB relies on the array element type to carry | |
16407 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16408 | specification. */ | |
16409 | ||
16410 | static struct type * | |
16411 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16412 | struct type *base_type, int cnst, int voltl) | |
16413 | { | |
16414 | struct type *el_type, *inner_array; | |
16415 | ||
16416 | base_type = copy_type (base_type); | |
16417 | inner_array = base_type; | |
16418 | ||
16419 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
16420 | { | |
16421 | TYPE_TARGET_TYPE (inner_array) = | |
16422 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16423 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16424 | } | |
16425 | ||
16426 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16427 | cnst |= TYPE_CONST (el_type); | |
16428 | voltl |= TYPE_VOLATILE (el_type); | |
16429 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16430 | ||
16431 | return set_die_type (die, base_type, cu); | |
16432 | } | |
16433 | ||
f792889a | 16434 | static struct type * |
e7c27a73 | 16435 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16436 | { |
f792889a | 16437 | struct type *base_type, *cv_type; |
c906108c | 16438 | |
e7c27a73 | 16439 | base_type = die_type (die, cu); |
7e314c57 JK |
16440 | |
16441 | /* The die_type call above may have already set the type for this DIE. */ | |
16442 | cv_type = get_die_type (die, cu); | |
16443 | if (cv_type) | |
16444 | return cv_type; | |
16445 | ||
2f608a3a KW |
16446 | /* In case the const qualifier is applied to an array type, the element type |
16447 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
16448 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 16449 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 16450 | |
f792889a DJ |
16451 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
16452 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16453 | } |
16454 | ||
f792889a | 16455 | static struct type * |
e7c27a73 | 16456 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16457 | { |
f792889a | 16458 | struct type *base_type, *cv_type; |
c906108c | 16459 | |
e7c27a73 | 16460 | base_type = die_type (die, cu); |
7e314c57 JK |
16461 | |
16462 | /* The die_type call above may have already set the type for this DIE. */ | |
16463 | cv_type = get_die_type (die, cu); | |
16464 | if (cv_type) | |
16465 | return cv_type; | |
16466 | ||
cf363f18 MW |
16467 | /* In case the volatile qualifier is applied to an array type, the |
16468 | element type is so qualified, not the array type (section 6.7.3 | |
16469 | of C99). */ | |
16470 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
16471 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
16472 | ||
f792889a DJ |
16473 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
16474 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16475 | } |
16476 | ||
06d66ee9 TT |
16477 | /* Handle DW_TAG_restrict_type. */ |
16478 | ||
16479 | static struct type * | |
16480 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
16481 | { | |
16482 | struct type *base_type, *cv_type; | |
16483 | ||
16484 | base_type = die_type (die, cu); | |
16485 | ||
16486 | /* The die_type call above may have already set the type for this DIE. */ | |
16487 | cv_type = get_die_type (die, cu); | |
16488 | if (cv_type) | |
16489 | return cv_type; | |
16490 | ||
16491 | cv_type = make_restrict_type (base_type); | |
16492 | return set_die_type (die, cv_type, cu); | |
16493 | } | |
16494 | ||
a2c2acaf MW |
16495 | /* Handle DW_TAG_atomic_type. */ |
16496 | ||
16497 | static struct type * | |
16498 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
16499 | { | |
16500 | struct type *base_type, *cv_type; | |
16501 | ||
16502 | base_type = die_type (die, cu); | |
16503 | ||
16504 | /* The die_type call above may have already set the type for this DIE. */ | |
16505 | cv_type = get_die_type (die, cu); | |
16506 | if (cv_type) | |
16507 | return cv_type; | |
16508 | ||
16509 | cv_type = make_atomic_type (base_type); | |
16510 | return set_die_type (die, cv_type, cu); | |
16511 | } | |
16512 | ||
c906108c SS |
16513 | /* Extract all information from a DW_TAG_string_type DIE and add to |
16514 | the user defined type vector. It isn't really a user defined type, | |
16515 | but it behaves like one, with other DIE's using an AT_user_def_type | |
16516 | attribute to reference it. */ | |
16517 | ||
f792889a | 16518 | static struct type * |
e7c27a73 | 16519 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16520 | { |
518817b3 | 16521 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 16522 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
16523 | struct type *type, *range_type, *index_type, *char_type; |
16524 | struct attribute *attr; | |
216a7e6b AB |
16525 | struct dynamic_prop prop; |
16526 | bool length_is_constant = true; | |
16527 | LONGEST length; | |
16528 | ||
16529 | /* There are a couple of places where bit sizes might be made use of | |
16530 | when parsing a DW_TAG_string_type, however, no producer that we know | |
16531 | of make use of these. Handling bit sizes that are a multiple of the | |
16532 | byte size is easy enough, but what about other bit sizes? Lets deal | |
16533 | with that problem when we have to. Warn about these attributes being | |
16534 | unsupported, then parse the type and ignore them like we always | |
16535 | have. */ | |
16536 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
16537 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
16538 | { | |
16539 | static bool warning_printed = false; | |
16540 | if (!warning_printed) | |
16541 | { | |
16542 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
16543 | "currently supported on DW_TAG_string_type.")); | |
16544 | warning_printed = true; | |
16545 | } | |
16546 | } | |
c906108c | 16547 | |
e142c38c | 16548 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 16549 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
16550 | { |
16551 | /* The string length describes the location at which the length of | |
16552 | the string can be found. The size of the length field can be | |
16553 | specified with one of the attributes below. */ | |
16554 | struct type *prop_type; | |
16555 | struct attribute *len | |
16556 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
16557 | if (len == nullptr) | |
16558 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 16559 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
16560 | { |
16561 | /* Pass 0 as the default as we know this attribute is constant | |
16562 | and the default value will not be returned. */ | |
16563 | LONGEST sz = dwarf2_get_attr_constant_value (len, 0); | |
09ba997f | 16564 | prop_type = cu->per_cu->int_type (sz, true); |
216a7e6b AB |
16565 | } |
16566 | else | |
16567 | { | |
16568 | /* If the size is not specified then we assume it is the size of | |
16569 | an address on this target. */ | |
09ba997f | 16570 | prop_type = cu->per_cu->addr_sized_int_type (true); |
216a7e6b AB |
16571 | } |
16572 | ||
16573 | /* Convert the attribute into a dynamic property. */ | |
16574 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
16575 | length = 1; | |
16576 | else | |
16577 | length_is_constant = false; | |
16578 | } | |
16579 | else if (attr != nullptr) | |
16580 | { | |
16581 | /* This DW_AT_string_length just contains the length with no | |
16582 | indirection. There's no need to create a dynamic property in this | |
16583 | case. Pass 0 for the default value as we know it will not be | |
16584 | returned in this case. */ | |
16585 | length = dwarf2_get_attr_constant_value (attr, 0); | |
16586 | } | |
16587 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 16588 | { |
216a7e6b AB |
16589 | /* We don't currently support non-constant byte sizes for strings. */ |
16590 | length = dwarf2_get_attr_constant_value (attr, 1); | |
c906108c SS |
16591 | } |
16592 | else | |
16593 | { | |
216a7e6b AB |
16594 | /* Use 1 as a fallback length if we have nothing else. */ |
16595 | length = 1; | |
c906108c | 16596 | } |
6ccb9162 | 16597 | |
46bf5051 | 16598 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
16599 | if (length_is_constant) |
16600 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
16601 | else | |
16602 | { | |
16603 | struct dynamic_prop low_bound; | |
16604 | ||
16605 | low_bound.kind = PROP_CONST; | |
16606 | low_bound.data.const_val = 1; | |
16607 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); | |
16608 | } | |
3b7538c0 UW |
16609 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
16610 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 16611 | |
f792889a | 16612 | return set_die_type (die, type, cu); |
c906108c SS |
16613 | } |
16614 | ||
4d804846 JB |
16615 | /* Assuming that DIE corresponds to a function, returns nonzero |
16616 | if the function is prototyped. */ | |
16617 | ||
16618 | static int | |
16619 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
16620 | { | |
16621 | struct attribute *attr; | |
16622 | ||
16623 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
16624 | if (attr && (DW_UNSND (attr) != 0)) | |
16625 | return 1; | |
16626 | ||
16627 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 16628 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
16629 | languages that allow unprototyped functions (Eg: Objective C). |
16630 | For all other languages, assume that functions are always | |
16631 | prototyped. */ | |
16632 | if (cu->language != language_c | |
16633 | && cu->language != language_objc | |
16634 | && cu->language != language_opencl) | |
16635 | return 1; | |
16636 | ||
16637 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
16638 | prototyped and unprototyped functions; default to prototyped, | |
16639 | since that is more common in modern code (and RealView warns | |
16640 | about unprototyped functions). */ | |
16641 | if (producer_is_realview (cu->producer)) | |
16642 | return 1; | |
16643 | ||
16644 | return 0; | |
16645 | } | |
16646 | ||
c906108c SS |
16647 | /* Handle DIES due to C code like: |
16648 | ||
16649 | struct foo | |
c5aa993b JM |
16650 | { |
16651 | int (*funcp)(int a, long l); | |
16652 | int b; | |
16653 | }; | |
c906108c | 16654 | |
0963b4bd | 16655 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 16656 | |
f792889a | 16657 | static struct type * |
e7c27a73 | 16658 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16659 | { |
518817b3 | 16660 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
16661 | struct type *type; /* Type that this function returns. */ |
16662 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
16663 | struct attribute *attr; |
16664 | ||
e7c27a73 | 16665 | type = die_type (die, cu); |
7e314c57 JK |
16666 | |
16667 | /* The die_type call above may have already set the type for this DIE. */ | |
16668 | ftype = get_die_type (die, cu); | |
16669 | if (ftype) | |
16670 | return ftype; | |
16671 | ||
0c8b41f1 | 16672 | ftype = lookup_function_type (type); |
c906108c | 16673 | |
4d804846 | 16674 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 16675 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 16676 | |
c055b101 CV |
16677 | /* Store the calling convention in the type if it's available in |
16678 | the subroutine die. Otherwise set the calling convention to | |
16679 | the default value DW_CC_normal. */ | |
16680 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf TBA |
16681 | if (attr != nullptr |
16682 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) | |
16683 | TYPE_CALLING_CONVENTION (ftype) | |
16684 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
54fcddd0 UW |
16685 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
16686 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
16687 | else | |
16688 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 16689 | |
743649fd MW |
16690 | /* Record whether the function returns normally to its caller or not |
16691 | if the DWARF producer set that information. */ | |
16692 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
16693 | if (attr && (DW_UNSND (attr) != 0)) | |
16694 | TYPE_NO_RETURN (ftype) = 1; | |
16695 | ||
76c10ea2 GM |
16696 | /* We need to add the subroutine type to the die immediately so |
16697 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 16698 | declared as the same subroutine type. */ |
76c10ea2 | 16699 | set_die_type (die, ftype, cu); |
6e70227d | 16700 | |
639d11d3 | 16701 | if (die->child != NULL) |
c906108c | 16702 | { |
bb5ed363 | 16703 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 16704 | struct die_info *child_die; |
8072405b | 16705 | int nparams, iparams; |
c906108c SS |
16706 | |
16707 | /* Count the number of parameters. | |
16708 | FIXME: GDB currently ignores vararg functions, but knows about | |
16709 | vararg member functions. */ | |
8072405b | 16710 | nparams = 0; |
639d11d3 | 16711 | child_die = die->child; |
c906108c SS |
16712 | while (child_die && child_die->tag) |
16713 | { | |
16714 | if (child_die->tag == DW_TAG_formal_parameter) | |
16715 | nparams++; | |
16716 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 16717 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
16718 | child_die = sibling_die (child_die); |
16719 | } | |
16720 | ||
16721 | /* Allocate storage for parameters and fill them in. */ | |
16722 | TYPE_NFIELDS (ftype) = nparams; | |
16723 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 16724 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 16725 | |
8072405b JK |
16726 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
16727 | even if we error out during the parameters reading below. */ | |
16728 | for (iparams = 0; iparams < nparams; iparams++) | |
16729 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
16730 | ||
16731 | iparams = 0; | |
639d11d3 | 16732 | child_die = die->child; |
c906108c SS |
16733 | while (child_die && child_die->tag) |
16734 | { | |
16735 | if (child_die->tag == DW_TAG_formal_parameter) | |
16736 | { | |
3ce3b1ba PA |
16737 | struct type *arg_type; |
16738 | ||
16739 | /* DWARF version 2 has no clean way to discern C++ | |
16740 | static and non-static member functions. G++ helps | |
16741 | GDB by marking the first parameter for non-static | |
16742 | member functions (which is the this pointer) as | |
16743 | artificial. We pass this information to | |
16744 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
16745 | ||
16746 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
16747 | 4.5 does not yet generate. */ | |
e142c38c | 16748 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 16749 | if (attr != nullptr) |
c906108c SS |
16750 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
16751 | else | |
9c37b5ae | 16752 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
16753 | arg_type = die_type (child_die, cu); |
16754 | ||
16755 | /* RealView does not mark THIS as const, which the testsuite | |
16756 | expects. GCC marks THIS as const in method definitions, | |
16757 | but not in the class specifications (GCC PR 43053). */ | |
16758 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
16759 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
16760 | { | |
16761 | int is_this = 0; | |
16762 | struct dwarf2_cu *arg_cu = cu; | |
16763 | const char *name = dwarf2_name (child_die, cu); | |
16764 | ||
16765 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 16766 | if (attr != nullptr) |
3ce3b1ba PA |
16767 | { |
16768 | /* If the compiler emits this, use it. */ | |
16769 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
16770 | is_this = 1; | |
16771 | } | |
16772 | else if (name && strcmp (name, "this") == 0) | |
16773 | /* Function definitions will have the argument names. */ | |
16774 | is_this = 1; | |
16775 | else if (name == NULL && iparams == 0) | |
16776 | /* Declarations may not have the names, so like | |
16777 | elsewhere in GDB, assume an artificial first | |
16778 | argument is "this". */ | |
16779 | is_this = 1; | |
16780 | ||
16781 | if (is_this) | |
16782 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
16783 | arg_type, 0); | |
16784 | } | |
16785 | ||
16786 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
16787 | iparams++; |
16788 | } | |
16789 | child_die = sibling_die (child_die); | |
16790 | } | |
16791 | } | |
16792 | ||
76c10ea2 | 16793 | return ftype; |
c906108c SS |
16794 | } |
16795 | ||
f792889a | 16796 | static struct type * |
e7c27a73 | 16797 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16798 | { |
518817b3 | 16799 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16800 | const char *name = NULL; |
3c8e0968 | 16801 | struct type *this_type, *target_type; |
c906108c | 16802 | |
94af9270 | 16803 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16804 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16805 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16806 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16807 | target_type = die_type (die, cu); |
16808 | if (target_type != this_type) | |
16809 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16810 | else | |
16811 | { | |
16812 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16813 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 16814 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
16815 | "- DIE at %s [in module %s]"), |
16816 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
16817 | TYPE_TARGET_TYPE (this_type) = NULL; |
16818 | } | |
e4003a34 TV |
16819 | if (name == NULL) |
16820 | { | |
16821 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates | |
16822 | anonymous typedefs, which is, strictly speaking, invalid DWARF. | |
16823 | Handle these by just returning the target type, rather than | |
16824 | constructing an anonymous typedef type and trying to handle this | |
16825 | elsewhere. */ | |
16826 | set_die_type (die, target_type, cu); | |
16827 | return target_type; | |
16828 | } | |
f792889a | 16829 | return this_type; |
c906108c SS |
16830 | } |
16831 | ||
9b790ce7 UW |
16832 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16833 | (which may be different from NAME) to the architecture back-end to allow | |
16834 | it to guess the correct format if necessary. */ | |
16835 | ||
16836 | static struct type * | |
16837 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 16838 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 UW |
16839 | { |
16840 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16841 | const struct floatformat **format; | |
16842 | struct type *type; | |
16843 | ||
16844 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16845 | if (format) | |
103a685e | 16846 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 16847 | else |
77b7c781 | 16848 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16849 | |
16850 | return type; | |
16851 | } | |
16852 | ||
eb77c9df AB |
16853 | /* Allocate an integer type of size BITS and name NAME. */ |
16854 | ||
16855 | static struct type * | |
16856 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
16857 | int bits, int unsigned_p, const char *name) | |
16858 | { | |
16859 | struct type *type; | |
16860 | ||
16861 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
16862 | instead of using DW_TAG_unspecified_type. This has been seen on | |
16863 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
16864 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
16865 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
16866 | type = objfile_type (objfile)->builtin_void; |
16867 | else | |
16868 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
16869 | ||
16870 | return type; | |
16871 | } | |
16872 | ||
8bdc1658 AB |
16873 | /* Initialise and return a floating point type of size BITS suitable for |
16874 | use as a component of a complex number. The NAME_HINT is passed through | |
16875 | when initialising the floating point type and is the name of the complex | |
16876 | type. | |
16877 | ||
16878 | As DWARF doesn't currently provide an explicit name for the components | |
16879 | of a complex number, but it can be helpful to have these components | |
16880 | named, we try to select a suitable name based on the size of the | |
16881 | component. */ | |
16882 | static struct type * | |
16883 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
16884 | struct objfile *objfile, | |
103a685e TT |
16885 | int bits, const char *name_hint, |
16886 | enum bfd_endian byte_order) | |
8bdc1658 AB |
16887 | { |
16888 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
16889 | struct type *tt = nullptr; | |
16890 | ||
35add35e AB |
16891 | /* Try to find a suitable floating point builtin type of size BITS. |
16892 | We're going to use the name of this type as the name for the complex | |
16893 | target type that we are about to create. */ | |
1db455a7 | 16894 | switch (cu->language) |
8bdc1658 | 16895 | { |
1db455a7 AB |
16896 | case language_fortran: |
16897 | switch (bits) | |
16898 | { | |
16899 | case 32: | |
16900 | tt = builtin_f_type (gdbarch)->builtin_real; | |
16901 | break; | |
16902 | case 64: | |
16903 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
16904 | break; | |
16905 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16906 | case 128: | |
16907 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
16908 | break; | |
16909 | } | |
8bdc1658 | 16910 | break; |
1db455a7 AB |
16911 | default: |
16912 | switch (bits) | |
16913 | { | |
16914 | case 32: | |
16915 | tt = builtin_type (gdbarch)->builtin_float; | |
16916 | break; | |
16917 | case 64: | |
16918 | tt = builtin_type (gdbarch)->builtin_double; | |
16919 | break; | |
16920 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16921 | case 128: | |
16922 | tt = builtin_type (gdbarch)->builtin_long_double; | |
16923 | break; | |
16924 | } | |
8bdc1658 AB |
16925 | break; |
16926 | } | |
16927 | ||
35add35e AB |
16928 | /* If the type we found doesn't match the size we were looking for, then |
16929 | pretend we didn't find a type at all, the complex target type we | |
16930 | create will then be nameless. */ | |
a12e5744 | 16931 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
16932 | tt = nullptr; |
16933 | ||
8bdc1658 | 16934 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
103a685e | 16935 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
16936 | } |
16937 | ||
c906108c SS |
16938 | /* Find a representation of a given base type and install |
16939 | it in the TYPE field of the die. */ | |
16940 | ||
f792889a | 16941 | static struct type * |
e7c27a73 | 16942 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16943 | { |
518817b3 | 16944 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
16945 | struct type *type; |
16946 | struct attribute *attr; | |
19f392bc | 16947 | int encoding = 0, bits = 0; |
15d034d0 | 16948 | const char *name; |
34877895 | 16949 | gdbarch *arch; |
c906108c | 16950 | |
e142c38c | 16951 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
435d3d88 | 16952 | if (attr != nullptr) |
34877895 | 16953 | encoding = DW_UNSND (attr); |
e142c38c | 16954 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16955 | if (attr != nullptr) |
34877895 | 16956 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
39cbfefa | 16957 | name = dwarf2_name (die, cu); |
6ccb9162 | 16958 | if (!name) |
34877895 | 16959 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e TT |
16960 | |
16961 | arch = get_objfile_arch (objfile); | |
16962 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
16963 | ||
34877895 PJ |
16964 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
16965 | if (attr) | |
103a685e TT |
16966 | { |
16967 | int endianity = DW_UNSND (attr); | |
16968 | ||
16969 | switch (endianity) | |
16970 | { | |
16971 | case DW_END_big: | |
16972 | byte_order = BFD_ENDIAN_BIG; | |
16973 | break; | |
16974 | case DW_END_little: | |
16975 | byte_order = BFD_ENDIAN_LITTLE; | |
16976 | break; | |
16977 | default: | |
16978 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
16979 | break; | |
16980 | } | |
16981 | } | |
6ccb9162 UW |
16982 | |
16983 | switch (encoding) | |
c906108c | 16984 | { |
6ccb9162 UW |
16985 | case DW_ATE_address: |
16986 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16987 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16988 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16989 | break; |
16990 | case DW_ATE_boolean: | |
19f392bc | 16991 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16992 | break; |
16993 | case DW_ATE_complex_float: | |
103a685e TT |
16994 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
16995 | byte_order); | |
19f392bc | 16996 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16997 | break; |
16998 | case DW_ATE_decimal_float: | |
19f392bc | 16999 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17000 | break; |
17001 | case DW_ATE_float: | |
103a685e | 17002 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
17003 | break; |
17004 | case DW_ATE_signed: | |
eb77c9df | 17005 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17006 | break; |
17007 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17008 | if (cu->language == language_fortran |
17009 | && name | |
61012eef | 17010 | && startswith (name, "character(")) |
19f392bc UW |
17011 | type = init_character_type (objfile, bits, 1, name); |
17012 | else | |
eb77c9df | 17013 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17014 | break; |
17015 | case DW_ATE_signed_char: | |
6e70227d | 17016 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17017 | || cu->language == language_pascal |
17018 | || cu->language == language_fortran) | |
19f392bc UW |
17019 | type = init_character_type (objfile, bits, 0, name); |
17020 | else | |
eb77c9df | 17021 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17022 | break; |
17023 | case DW_ATE_unsigned_char: | |
868a0084 | 17024 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17025 | || cu->language == language_pascal |
c44af4eb TT |
17026 | || cu->language == language_fortran |
17027 | || cu->language == language_rust) | |
19f392bc UW |
17028 | type = init_character_type (objfile, bits, 1, name); |
17029 | else | |
eb77c9df | 17030 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17031 | break; |
75079b2b | 17032 | case DW_ATE_UTF: |
53e710ac | 17033 | { |
53e710ac PA |
17034 | if (bits == 16) |
17035 | type = builtin_type (arch)->builtin_char16; | |
17036 | else if (bits == 32) | |
17037 | type = builtin_type (arch)->builtin_char32; | |
17038 | else | |
17039 | { | |
b98664d3 | 17040 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17041 | bits); |
eb77c9df | 17042 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17043 | } |
17044 | return set_die_type (die, type, cu); | |
17045 | } | |
75079b2b TT |
17046 | break; |
17047 | ||
6ccb9162 | 17048 | default: |
b98664d3 | 17049 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17050 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17051 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17052 | break; |
c906108c | 17053 | } |
6ccb9162 | 17054 | |
0114d602 | 17055 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17056 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17057 | |
2b4424c3 TT |
17058 | maybe_set_alignment (cu, die, type); |
17059 | ||
103a685e | 17060 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
34877895 | 17061 | |
f792889a | 17062 | return set_die_type (die, type, cu); |
c906108c SS |
17063 | } |
17064 | ||
80180f79 SA |
17065 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17066 | resulting value of the attribute into struct bound_prop. | |
17067 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17068 | ||
17069 | static int | |
17070 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17071 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17072 | struct type *default_type) | |
80180f79 SA |
17073 | { |
17074 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17075 | struct obstack *obstack |
17076 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17077 | |
9a49df9d AB |
17078 | gdb_assert (default_type != NULL); |
17079 | ||
80180f79 SA |
17080 | if (attr == NULL || prop == NULL) |
17081 | return 0; | |
17082 | ||
4fc6c0d5 | 17083 | if (attr->form_is_block ()) |
80180f79 | 17084 | { |
8d749320 | 17085 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17086 | baton->property_type = default_type; |
80180f79 SA |
17087 | baton->locexpr.per_cu = cu->per_cu; |
17088 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17089 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
216a7e6b AB |
17090 | switch (attr->name) |
17091 | { | |
17092 | case DW_AT_string_length: | |
17093 | baton->locexpr.is_reference = true; | |
17094 | break; | |
17095 | default: | |
17096 | baton->locexpr.is_reference = false; | |
17097 | break; | |
17098 | } | |
80180f79 SA |
17099 | prop->data.baton = baton; |
17100 | prop->kind = PROP_LOCEXPR; | |
17101 | gdb_assert (prop->data.baton != NULL); | |
17102 | } | |
cd6c91b4 | 17103 | else if (attr->form_is_ref ()) |
80180f79 SA |
17104 | { |
17105 | struct dwarf2_cu *target_cu = cu; | |
17106 | struct die_info *target_die; | |
17107 | struct attribute *target_attr; | |
17108 | ||
17109 | target_die = follow_die_ref (die, attr, &target_cu); | |
17110 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17111 | if (target_attr == NULL) |
17112 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17113 | target_cu); | |
80180f79 SA |
17114 | if (target_attr == NULL) |
17115 | return 0; | |
17116 | ||
df25ebbd | 17117 | switch (target_attr->name) |
80180f79 | 17118 | { |
df25ebbd | 17119 | case DW_AT_location: |
cd6c91b4 | 17120 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 17121 | { |
8d749320 | 17122 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17123 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17124 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17125 | prop->data.baton = baton; | |
17126 | prop->kind = PROP_LOCLIST; | |
17127 | gdb_assert (prop->data.baton != NULL); | |
17128 | } | |
4fc6c0d5 | 17129 | else if (target_attr->form_is_block ()) |
df25ebbd | 17130 | { |
8d749320 | 17131 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17132 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17133 | baton->locexpr.per_cu = cu->per_cu; |
17134 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17135 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17136 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17137 | prop->data.baton = baton; |
17138 | prop->kind = PROP_LOCEXPR; | |
17139 | gdb_assert (prop->data.baton != NULL); | |
17140 | } | |
17141 | else | |
17142 | { | |
17143 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17144 | "dynamic property"); | |
17145 | return 0; | |
17146 | } | |
17147 | break; | |
17148 | case DW_AT_data_member_location: | |
17149 | { | |
17150 | LONGEST offset; | |
17151 | ||
17152 | if (!handle_data_member_location (target_die, target_cu, | |
17153 | &offset)) | |
17154 | return 0; | |
17155 | ||
8d749320 | 17156 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17157 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17158 | target_cu); |
df25ebbd JB |
17159 | baton->offset_info.offset = offset; |
17160 | baton->offset_info.type = die_type (target_die, target_cu); | |
17161 | prop->data.baton = baton; | |
17162 | prop->kind = PROP_ADDR_OFFSET; | |
17163 | break; | |
17164 | } | |
80180f79 SA |
17165 | } |
17166 | } | |
cd6c91b4 | 17167 | else if (attr->form_is_constant ()) |
80180f79 SA |
17168 | { |
17169 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17170 | prop->kind = PROP_CONST; | |
17171 | } | |
17172 | else | |
17173 | { | |
17174 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17175 | dwarf2_name (die, cu)); | |
17176 | return 0; | |
17177 | } | |
17178 | ||
17179 | return 1; | |
17180 | } | |
17181 | ||
09ba997f | 17182 | /* See read.h. */ |
9a49df9d | 17183 | |
09ba997f TT |
17184 | struct type * |
17185 | dwarf2_per_cu_data::int_type (int size_in_bytes, bool unsigned_p) const | |
9a49df9d | 17186 | { |
09ba997f | 17187 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
17188 | struct type *int_type; |
17189 | ||
17190 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
17191 | #define TRY_TYPE(F) \ |
17192 | int_type = (unsigned_p \ | |
17193 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17194 | : objfile_type (objfile)->builtin_ ## F); \ | |
17195 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
17196 | return int_type |
17197 | ||
17198 | TRY_TYPE (char); | |
17199 | TRY_TYPE (short); | |
17200 | TRY_TYPE (int); | |
17201 | TRY_TYPE (long); | |
17202 | TRY_TYPE (long_long); | |
17203 | ||
17204 | #undef TRY_TYPE | |
17205 | ||
17206 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17207 | } | |
17208 | ||
09ba997f | 17209 | /* See read.h. */ |
11a8b164 | 17210 | |
09ba997f TT |
17211 | struct type * |
17212 | dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p) const | |
11a8b164 | 17213 | { |
09ba997f TT |
17214 | int addr_size = this->addr_size (); |
17215 | return int_type (addr_size, unsigned_p); | |
11a8b164 AB |
17216 | } |
17217 | ||
b86352cf AB |
17218 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17219 | present (which is valid) then compute the default type based on the | |
17220 | compilation units address size. */ | |
17221 | ||
17222 | static struct type * | |
17223 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17224 | { | |
17225 | struct type *index_type = die_type (die, cu); | |
17226 | ||
17227 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17228 | without specifying a base type. | |
17229 | In that case, the base type must be set to the type of | |
17230 | the lower bound, upper bound or count, in that order, if any of these | |
17231 | three attributes references an object that has a type. | |
17232 | If no base type is found, the Dwarf-2 specifications say that | |
17233 | a signed integer type of size equal to the size of an address should | |
17234 | be used. | |
17235 | For the following C code: `extern char gdb_int [];' | |
17236 | GCC produces an empty range DIE. | |
17237 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17238 | high bound or count are not yet handled by this code. */ | |
17239 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
09ba997f | 17240 | index_type = cu->per_cu->addr_sized_int_type (false); |
b86352cf AB |
17241 | |
17242 | return index_type; | |
17243 | } | |
17244 | ||
a02abb62 JB |
17245 | /* Read the given DW_AT_subrange DIE. */ |
17246 | ||
f792889a | 17247 | static struct type * |
a02abb62 JB |
17248 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17249 | { | |
4c9ad8c2 | 17250 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17251 | struct type *range_type; |
17252 | struct attribute *attr; | |
729efb13 | 17253 | struct dynamic_prop low, high; |
4fae6e18 | 17254 | int low_default_is_valid; |
c451ebe5 | 17255 | int high_bound_is_count = 0; |
15d034d0 | 17256 | const char *name; |
d359392f | 17257 | ULONGEST negative_mask; |
e77813c8 | 17258 | |
b86352cf AB |
17259 | orig_base_type = read_subrange_index_type (die, cu); |
17260 | ||
4c9ad8c2 TT |
17261 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17262 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17263 | creating the range type, but we use the result of check_typedef | |
17264 | when examining properties of the type. */ | |
17265 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17266 | |
7e314c57 JK |
17267 | /* The die_type call above may have already set the type for this DIE. */ |
17268 | range_type = get_die_type (die, cu); | |
17269 | if (range_type) | |
17270 | return range_type; | |
17271 | ||
729efb13 SA |
17272 | low.kind = PROP_CONST; |
17273 | high.kind = PROP_CONST; | |
17274 | high.data.const_val = 0; | |
17275 | ||
4fae6e18 JK |
17276 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17277 | omitting DW_AT_lower_bound. */ | |
17278 | switch (cu->language) | |
6e70227d | 17279 | { |
4fae6e18 JK |
17280 | case language_c: |
17281 | case language_cplus: | |
729efb13 | 17282 | low.data.const_val = 0; |
4fae6e18 JK |
17283 | low_default_is_valid = 1; |
17284 | break; | |
17285 | case language_fortran: | |
729efb13 | 17286 | low.data.const_val = 1; |
4fae6e18 JK |
17287 | low_default_is_valid = 1; |
17288 | break; | |
17289 | case language_d: | |
4fae6e18 | 17290 | case language_objc: |
c44af4eb | 17291 | case language_rust: |
729efb13 | 17292 | low.data.const_val = 0; |
4fae6e18 JK |
17293 | low_default_is_valid = (cu->header.version >= 4); |
17294 | break; | |
17295 | case language_ada: | |
17296 | case language_m2: | |
17297 | case language_pascal: | |
729efb13 | 17298 | low.data.const_val = 1; |
4fae6e18 JK |
17299 | low_default_is_valid = (cu->header.version >= 4); |
17300 | break; | |
17301 | default: | |
729efb13 | 17302 | low.data.const_val = 0; |
4fae6e18 JK |
17303 | low_default_is_valid = 0; |
17304 | break; | |
a02abb62 JB |
17305 | } |
17306 | ||
e142c38c | 17307 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 17308 | if (attr != nullptr) |
9a49df9d | 17309 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17310 | else if (!low_default_is_valid) |
b98664d3 | 17311 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17312 | "- DIE at %s [in module %s]"), |
17313 | sect_offset_str (die->sect_off), | |
518817b3 | 17314 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17315 | |
506f5c41 TV |
17316 | struct attribute *attr_ub, *attr_count; |
17317 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17318 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17319 | { |
506f5c41 | 17320 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17321 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17322 | { |
c451ebe5 SA |
17323 | /* If bounds are constant do the final calculation here. */ |
17324 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17325 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17326 | else | |
17327 | high_bound_is_count = 1; | |
c2ff108b | 17328 | } |
506f5c41 TV |
17329 | else |
17330 | { | |
17331 | if (attr_ub != NULL) | |
17332 | complaint (_("Unresolved DW_AT_upper_bound " | |
17333 | "- DIE at %s [in module %s]"), | |
17334 | sect_offset_str (die->sect_off), | |
17335 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17336 | if (attr_count != NULL) | |
17337 | complaint (_("Unresolved DW_AT_count " | |
17338 | "- DIE at %s [in module %s]"), | |
17339 | sect_offset_str (die->sect_off), | |
17340 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17341 | } | |
e77813c8 | 17342 | } |
a02abb62 | 17343 | |
4e962e74 TT |
17344 | LONGEST bias = 0; |
17345 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 17346 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
4e962e74 TT |
17347 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); |
17348 | ||
dbb9c2b1 JB |
17349 | /* Normally, the DWARF producers are expected to use a signed |
17350 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17351 | But this is unfortunately not always the case, as witnessed | |
17352 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17353 | is used instead. To work around that ambiguity, we treat | |
17354 | the bounds as signed, and thus sign-extend their values, when | |
17355 | the base type is signed. */ | |
6e70227d | 17356 | negative_mask = |
d359392f | 17357 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17358 | if (low.kind == PROP_CONST |
17359 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17360 | low.data.const_val |= negative_mask; | |
17361 | if (high.kind == PROP_CONST | |
17362 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17363 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17364 | |
5bbd8269 AB |
17365 | /* Check for bit and byte strides. */ |
17366 | struct dynamic_prop byte_stride_prop; | |
17367 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
17368 | if (attr_byte_stride != nullptr) | |
17369 | { | |
09ba997f | 17370 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17371 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
17372 | prop_type); | |
17373 | } | |
17374 | ||
17375 | struct dynamic_prop bit_stride_prop; | |
17376 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
17377 | if (attr_bit_stride != nullptr) | |
17378 | { | |
17379 | /* It only makes sense to have either a bit or byte stride. */ | |
17380 | if (attr_byte_stride != nullptr) | |
17381 | { | |
17382 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
17383 | "- DIE at %s [in module %s]"), | |
17384 | sect_offset_str (die->sect_off), | |
17385 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17386 | attr_bit_stride = nullptr; | |
17387 | } | |
17388 | else | |
17389 | { | |
09ba997f | 17390 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17391 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
17392 | prop_type); | |
17393 | } | |
17394 | } | |
17395 | ||
17396 | if (attr_byte_stride != nullptr | |
17397 | || attr_bit_stride != nullptr) | |
17398 | { | |
17399 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
17400 | struct dynamic_prop *stride | |
17401 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
17402 | ||
17403 | range_type | |
17404 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
17405 | &high, bias, stride, byte_stride_p); | |
17406 | } | |
17407 | else | |
17408 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 17409 | |
c451ebe5 SA |
17410 | if (high_bound_is_count) |
17411 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17412 | ||
c2ff108b JK |
17413 | /* Ada expects an empty array on no boundary attributes. */ |
17414 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17415 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17416 | |
39cbfefa DJ |
17417 | name = dwarf2_name (die, cu); |
17418 | if (name) | |
17419 | TYPE_NAME (range_type) = name; | |
6e70227d | 17420 | |
e142c38c | 17421 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17422 | if (attr != nullptr) |
a02abb62 JB |
17423 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
17424 | ||
2b4424c3 TT |
17425 | maybe_set_alignment (cu, die, range_type); |
17426 | ||
7e314c57 JK |
17427 | set_die_type (die, range_type, cu); |
17428 | ||
17429 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17430 | set_descriptive_type (range_type, die, cu); |
17431 | ||
7e314c57 | 17432 | return range_type; |
a02abb62 | 17433 | } |
6e70227d | 17434 | |
f792889a | 17435 | static struct type * |
81a17f79 JB |
17436 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17437 | { | |
17438 | struct type *type; | |
81a17f79 | 17439 | |
518817b3 SM |
17440 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17441 | NULL); | |
0114d602 | 17442 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17443 | |
74a2f8ff | 17444 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 17445 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
17446 | such a type, we treat it as a stub, and try to resolve it later on, |
17447 | when needed. */ | |
17448 | if (cu->language == language_ada) | |
17449 | TYPE_STUB (type) = 1; | |
17450 | ||
f792889a | 17451 | return set_die_type (die, type, cu); |
81a17f79 | 17452 | } |
a02abb62 | 17453 | |
639d11d3 DC |
17454 | /* Read a single die and all its descendents. Set the die's sibling |
17455 | field to NULL; set other fields in the die correctly, and set all | |
17456 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17457 | location of the info_ptr after reading all of those dies. PARENT | |
17458 | is the parent of the die in question. */ | |
17459 | ||
17460 | static struct die_info * | |
dee91e82 | 17461 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17462 | const gdb_byte *info_ptr, |
17463 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17464 | struct die_info *parent) |
639d11d3 DC |
17465 | { |
17466 | struct die_info *die; | |
d521ce57 | 17467 | const gdb_byte *cur_ptr; |
639d11d3 | 17468 | |
3e225074 | 17469 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
17470 | if (die == NULL) |
17471 | { | |
17472 | *new_info_ptr = cur_ptr; | |
17473 | return NULL; | |
17474 | } | |
93311388 | 17475 | store_in_ref_table (die, reader->cu); |
639d11d3 | 17476 | |
3e225074 | 17477 | if (die->has_children) |
bf6af496 | 17478 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17479 | else |
17480 | { | |
17481 | die->child = NULL; | |
17482 | *new_info_ptr = cur_ptr; | |
17483 | } | |
17484 | ||
17485 | die->sibling = NULL; | |
17486 | die->parent = parent; | |
17487 | return die; | |
17488 | } | |
17489 | ||
17490 | /* Read a die, all of its descendents, and all of its siblings; set | |
17491 | all of the fields of all of the dies correctly. Arguments are as | |
17492 | in read_die_and_children. */ | |
17493 | ||
17494 | static struct die_info * | |
bf6af496 | 17495 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17496 | const gdb_byte *info_ptr, |
17497 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17498 | struct die_info *parent) |
639d11d3 DC |
17499 | { |
17500 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17501 | const gdb_byte *cur_ptr; |
639d11d3 | 17502 | |
c906108c | 17503 | cur_ptr = info_ptr; |
639d11d3 DC |
17504 | first_die = last_sibling = NULL; |
17505 | ||
17506 | while (1) | |
c906108c | 17507 | { |
639d11d3 | 17508 | struct die_info *die |
dee91e82 | 17509 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17510 | |
1d325ec1 | 17511 | if (die == NULL) |
c906108c | 17512 | { |
639d11d3 DC |
17513 | *new_info_ptr = cur_ptr; |
17514 | return first_die; | |
c906108c | 17515 | } |
1d325ec1 DJ |
17516 | |
17517 | if (!first_die) | |
17518 | first_die = die; | |
c906108c | 17519 | else |
1d325ec1 DJ |
17520 | last_sibling->sibling = die; |
17521 | ||
17522 | last_sibling = die; | |
c906108c | 17523 | } |
c906108c SS |
17524 | } |
17525 | ||
bf6af496 DE |
17526 | /* Read a die, all of its descendents, and all of its siblings; set |
17527 | all of the fields of all of the dies correctly. Arguments are as | |
17528 | in read_die_and_children. | |
17529 | This the main entry point for reading a DIE and all its children. */ | |
17530 | ||
17531 | static struct die_info * | |
17532 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17533 | const gdb_byte *info_ptr, |
17534 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17535 | struct die_info *parent) |
17536 | { | |
17537 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17538 | new_info_ptr, parent); | |
17539 | ||
b4f54984 | 17540 | if (dwarf_die_debug) |
bf6af496 DE |
17541 | { |
17542 | fprintf_unfiltered (gdb_stdlog, | |
17543 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17544 | reader->die_section->get_name (), |
bf6af496 DE |
17545 | (unsigned) (info_ptr - reader->die_section->buffer), |
17546 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17547 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17548 | } |
17549 | ||
17550 | return die; | |
17551 | } | |
17552 | ||
3019eac3 DE |
17553 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17554 | attributes. | |
17555 | The caller is responsible for filling in the extra attributes | |
17556 | and updating (*DIEP)->num_attrs. | |
17557 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17558 | except for its child, sibling, and parent fields. */ |
93311388 | 17559 | |
d521ce57 | 17560 | static const gdb_byte * |
3019eac3 | 17561 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17562 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 17563 | int num_extra_attrs) |
93311388 | 17564 | { |
b64f50a1 | 17565 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17566 | struct abbrev_info *abbrev; |
17567 | struct die_info *die; | |
17568 | struct dwarf2_cu *cu = reader->cu; | |
17569 | bfd *abfd = reader->abfd; | |
17570 | ||
9c541725 | 17571 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17572 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17573 | info_ptr += bytes_read; | |
17574 | if (!abbrev_number) | |
17575 | { | |
17576 | *diep = NULL; | |
93311388 DE |
17577 | return info_ptr; |
17578 | } | |
17579 | ||
685af9cd | 17580 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 17581 | if (!abbrev) |
348e048f DE |
17582 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17583 | abbrev_number, | |
17584 | bfd_get_filename (abfd)); | |
17585 | ||
3019eac3 | 17586 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17587 | die->sect_off = sect_off; |
93311388 DE |
17588 | die->tag = abbrev->tag; |
17589 | die->abbrev = abbrev_number; | |
3e225074 | 17590 | die->has_children = abbrev->has_children; |
93311388 | 17591 | |
3019eac3 DE |
17592 | /* Make the result usable. |
17593 | The caller needs to update num_attrs after adding the extra | |
17594 | attributes. */ | |
93311388 DE |
17595 | die->num_attrs = abbrev->num_attrs; |
17596 | ||
18a8505e | 17597 | std::vector<int> indexes_that_need_reprocess; |
93311388 | 17598 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e AT |
17599 | { |
17600 | bool need_reprocess; | |
17601 | info_ptr = | |
17602 | read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], | |
17603 | info_ptr, &need_reprocess); | |
17604 | if (need_reprocess) | |
17605 | indexes_that_need_reprocess.push_back (i); | |
17606 | } | |
17607 | ||
17608 | struct attribute *attr = dwarf2_attr_no_follow (die, DW_AT_str_offsets_base); | |
17609 | if (attr != nullptr) | |
17610 | cu->str_offsets_base = DW_UNSND (attr); | |
93311388 | 17611 | |
18a8505e AT |
17612 | auto maybe_addr_base = lookup_addr_base(die); |
17613 | if (maybe_addr_base.has_value ()) | |
17614 | cu->addr_base = *maybe_addr_base; | |
17615 | for (int index : indexes_that_need_reprocess) | |
17616 | read_attribute_reprocess (reader, &die->attrs[index]); | |
93311388 | 17617 | *diep = die; |
93311388 DE |
17618 | return info_ptr; |
17619 | } | |
17620 | ||
3019eac3 DE |
17621 | /* Read a die and all its attributes. |
17622 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17623 | except for its child, sibling, and parent fields. */ |
3019eac3 | 17624 | |
d521ce57 | 17625 | static const gdb_byte * |
3019eac3 | 17626 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 17627 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 17628 | { |
d521ce57 | 17629 | const gdb_byte *result; |
bf6af496 | 17630 | |
3e225074 | 17631 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 17632 | |
b4f54984 | 17633 | if (dwarf_die_debug) |
bf6af496 DE |
17634 | { |
17635 | fprintf_unfiltered (gdb_stdlog, | |
17636 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17637 | reader->die_section->get_name (), |
bf6af496 DE |
17638 | (unsigned) (info_ptr - reader->die_section->buffer), |
17639 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17640 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17641 | } |
17642 | ||
17643 | return result; | |
3019eac3 | 17644 | } |
433df2d4 | 17645 | \f |
c906108c | 17646 | |
72bf9492 DJ |
17647 | /* Returns nonzero if TAG represents a type that we might generate a partial |
17648 | symbol for. */ | |
17649 | ||
17650 | static int | |
17651 | is_type_tag_for_partial (int tag) | |
17652 | { | |
17653 | switch (tag) | |
17654 | { | |
17655 | #if 0 | |
17656 | /* Some types that would be reasonable to generate partial symbols for, | |
17657 | that we don't at present. */ | |
17658 | case DW_TAG_array_type: | |
17659 | case DW_TAG_file_type: | |
17660 | case DW_TAG_ptr_to_member_type: | |
17661 | case DW_TAG_set_type: | |
17662 | case DW_TAG_string_type: | |
17663 | case DW_TAG_subroutine_type: | |
17664 | #endif | |
17665 | case DW_TAG_base_type: | |
17666 | case DW_TAG_class_type: | |
680b30c7 | 17667 | case DW_TAG_interface_type: |
72bf9492 DJ |
17668 | case DW_TAG_enumeration_type: |
17669 | case DW_TAG_structure_type: | |
17670 | case DW_TAG_subrange_type: | |
17671 | case DW_TAG_typedef: | |
17672 | case DW_TAG_union_type: | |
17673 | return 1; | |
17674 | default: | |
17675 | return 0; | |
17676 | } | |
17677 | } | |
17678 | ||
17679 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
17680 | ||
17681 | static struct partial_die_info * | |
dee91e82 | 17682 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 17683 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 17684 | { |
dee91e82 | 17685 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 17686 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 17687 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 17688 | unsigned int bytes_read; |
5afb4e99 | 17689 | unsigned int load_all = 0; |
72bf9492 DJ |
17690 | int nesting_level = 1; |
17691 | ||
17692 | parent_die = NULL; | |
17693 | last_die = NULL; | |
17694 | ||
7adf1e79 DE |
17695 | gdb_assert (cu->per_cu != NULL); |
17696 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
17697 | load_all = 1; |
17698 | ||
72bf9492 DJ |
17699 | cu->partial_dies |
17700 | = htab_create_alloc_ex (cu->header.length / 12, | |
17701 | partial_die_hash, | |
17702 | partial_die_eq, | |
17703 | NULL, | |
17704 | &cu->comp_unit_obstack, | |
17705 | hashtab_obstack_allocate, | |
17706 | dummy_obstack_deallocate); | |
17707 | ||
72bf9492 DJ |
17708 | while (1) |
17709 | { | |
685af9cd | 17710 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
17711 | |
17712 | /* A NULL abbrev means the end of a series of children. */ | |
17713 | if (abbrev == NULL) | |
17714 | { | |
17715 | if (--nesting_level == 0) | |
cd9983dd YQ |
17716 | return first_die; |
17717 | ||
72bf9492 DJ |
17718 | info_ptr += bytes_read; |
17719 | last_die = parent_die; | |
17720 | parent_die = parent_die->die_parent; | |
17721 | continue; | |
17722 | } | |
17723 | ||
98bfdba5 PA |
17724 | /* Check for template arguments. We never save these; if |
17725 | they're seen, we just mark the parent, and go on our way. */ | |
17726 | if (parent_die != NULL | |
17727 | && cu->language == language_cplus | |
17728 | && (abbrev->tag == DW_TAG_template_type_param | |
17729 | || abbrev->tag == DW_TAG_template_value_param)) | |
17730 | { | |
17731 | parent_die->has_template_arguments = 1; | |
17732 | ||
17733 | if (!load_all) | |
17734 | { | |
17735 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 17736 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17737 | continue; |
17738 | } | |
17739 | } | |
17740 | ||
0d99eb77 | 17741 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
17742 | Skip their other children. */ |
17743 | if (!load_all | |
17744 | && cu->language == language_cplus | |
17745 | && parent_die != NULL | |
17746 | && parent_die->tag == DW_TAG_subprogram) | |
17747 | { | |
dee91e82 | 17748 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17749 | continue; |
17750 | } | |
17751 | ||
5afb4e99 DJ |
17752 | /* Check whether this DIE is interesting enough to save. Normally |
17753 | we would not be interested in members here, but there may be | |
17754 | later variables referencing them via DW_AT_specification (for | |
17755 | static members). */ | |
17756 | if (!load_all | |
17757 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 17758 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
17759 | && abbrev->tag != DW_TAG_enumerator |
17760 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 17761 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 17762 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 17763 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 17764 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 17765 | && abbrev->tag != DW_TAG_module |
95554aad | 17766 | && abbrev->tag != DW_TAG_member |
74921315 KS |
17767 | && abbrev->tag != DW_TAG_imported_unit |
17768 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
17769 | { |
17770 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17771 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
17772 | continue; |
17773 | } | |
17774 | ||
6f06d47b YQ |
17775 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
17776 | abbrev); | |
cd9983dd | 17777 | |
48fbe735 | 17778 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
17779 | |
17780 | /* This two-pass algorithm for processing partial symbols has a | |
17781 | high cost in cache pressure. Thus, handle some simple cases | |
17782 | here which cover the majority of C partial symbols. DIEs | |
17783 | which neither have specification tags in them, nor could have | |
17784 | specification tags elsewhere pointing at them, can simply be | |
17785 | processed and discarded. | |
17786 | ||
17787 | This segment is also optional; scan_partial_symbols and | |
17788 | add_partial_symbol will handle these DIEs if we chain | |
17789 | them in normally. When compilers which do not emit large | |
17790 | quantities of duplicate debug information are more common, | |
17791 | this code can probably be removed. */ | |
17792 | ||
17793 | /* Any complete simple types at the top level (pretty much all | |
17794 | of them, for a language without namespaces), can be processed | |
17795 | directly. */ | |
17796 | if (parent_die == NULL | |
cd9983dd YQ |
17797 | && pdi.has_specification == 0 |
17798 | && pdi.is_declaration == 0 | |
17799 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
17800 | || pdi.tag == DW_TAG_base_type | |
17801 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 17802 | { |
cd9983dd | 17803 | if (building_psymtab && pdi.name != NULL) |
31edb802 | 17804 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17805 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 17806 | psymbol_placement::STATIC, |
1762568f | 17807 | 0, cu->language, objfile); |
cd9983dd | 17808 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17809 | continue; |
17810 | } | |
17811 | ||
d8228535 JK |
17812 | /* The exception for DW_TAG_typedef with has_children above is |
17813 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 17814 | type_name_or_error will error on such types later. |
d8228535 JK |
17815 | |
17816 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17817 | it could not find the child DIEs referenced later, this is checked | |
17818 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17819 | ||
cd9983dd | 17820 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 17821 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 17822 | "- DIE at %s [in module %s]"), |
cd9983dd | 17823 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 17824 | |
72bf9492 DJ |
17825 | /* If we're at the second level, and we're an enumerator, and |
17826 | our parent has no specification (meaning possibly lives in a | |
17827 | namespace elsewhere), then we can add the partial symbol now | |
17828 | instead of queueing it. */ | |
cd9983dd | 17829 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
17830 | && parent_die != NULL |
17831 | && parent_die->die_parent == NULL | |
17832 | && parent_die->tag == DW_TAG_enumeration_type | |
17833 | && parent_die->has_specification == 0) | |
17834 | { | |
cd9983dd | 17835 | if (pdi.name == NULL) |
b98664d3 | 17836 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 17837 | else if (building_psymtab) |
31edb802 | 17838 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17839 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 17840 | cu->language == language_cplus |
75aedd27 TT |
17841 | ? psymbol_placement::GLOBAL |
17842 | : psymbol_placement::STATIC, | |
1762568f | 17843 | 0, cu->language, objfile); |
72bf9492 | 17844 | |
cd9983dd | 17845 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17846 | continue; |
17847 | } | |
17848 | ||
cd9983dd | 17849 | struct partial_die_info *part_die |
6f06d47b | 17850 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 17851 | |
72bf9492 DJ |
17852 | /* We'll save this DIE so link it in. */ |
17853 | part_die->die_parent = parent_die; | |
17854 | part_die->die_sibling = NULL; | |
17855 | part_die->die_child = NULL; | |
17856 | ||
17857 | if (last_die && last_die == parent_die) | |
17858 | last_die->die_child = part_die; | |
17859 | else if (last_die) | |
17860 | last_die->die_sibling = part_die; | |
17861 | ||
17862 | last_die = part_die; | |
17863 | ||
17864 | if (first_die == NULL) | |
17865 | first_die = part_die; | |
17866 | ||
17867 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17868 | find interesting need to be in the hash table, because we | |
17869 | also have the parent/sibling/child chains; only those that we | |
17870 | might refer to by offset later during partial symbol reading. | |
17871 | ||
17872 | For now this means things that might have be the target of a | |
17873 | DW_AT_specification, DW_AT_abstract_origin, or | |
17874 | DW_AT_extension. DW_AT_extension will refer only to | |
17875 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17876 | many things under the function DIE, but we do not recurse | |
17877 | into function DIEs during partial symbol reading) and | |
17878 | possibly variables as well; DW_AT_specification refers to | |
17879 | declarations. Declarations ought to have the DW_AT_declaration | |
17880 | flag. It happens that GCC forgets to put it in sometimes, but | |
17881 | only for functions, not for types. | |
17882 | ||
17883 | Adding more things than necessary to the hash table is harmless | |
17884 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17885 | wasted time in find_partial_die, when we reread the compilation |
17886 | unit with load_all_dies set. */ | |
72bf9492 | 17887 | |
5afb4e99 | 17888 | if (load_all |
72929c62 | 17889 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17890 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17891 | || abbrev->tag == DW_TAG_variable |
17892 | || abbrev->tag == DW_TAG_namespace | |
17893 | || part_die->is_declaration) | |
17894 | { | |
17895 | void **slot; | |
17896 | ||
17897 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17898 | to_underlying (part_die->sect_off), |
17899 | INSERT); | |
72bf9492 DJ |
17900 | *slot = part_die; |
17901 | } | |
17902 | ||
72bf9492 | 17903 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 17904 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17905 | languages we have to, so that we can get at method physnames |
17906 | to infer fully qualified class names, for DW_AT_specification, | |
17907 | and for C++ template arguments. For C++, we also look one level | |
17908 | inside functions to find template arguments (if the name of the | |
17909 | function does not already contain the template arguments). | |
bc30ff58 | 17910 | |
0a4b0913 AB |
17911 | For Ada and Fortran, we need to scan the children of subprograms |
17912 | and lexical blocks as well because these languages allow the | |
17913 | definition of nested entities that could be interesting for the | |
17914 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 17915 | if (last_die->has_children |
5afb4e99 DJ |
17916 | && (load_all |
17917 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17918 | || last_die->tag == DW_TAG_module |
72bf9492 | 17919 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17920 | || (cu->language == language_cplus |
17921 | && last_die->tag == DW_TAG_subprogram | |
17922 | && (last_die->name == NULL | |
17923 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17924 | || (cu->language != language_c |
17925 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17926 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17927 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 17928 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
17929 | || ((cu->language == language_ada |
17930 | || cu->language == language_fortran) | |
bc30ff58 JB |
17931 | && (last_die->tag == DW_TAG_subprogram |
17932 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17933 | { |
17934 | nesting_level++; | |
17935 | parent_die = last_die; | |
17936 | continue; | |
17937 | } | |
17938 | ||
17939 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17940 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17941 | |
17942 | /* Back to the top, do it again. */ | |
17943 | } | |
17944 | } | |
17945 | ||
6f06d47b YQ |
17946 | partial_die_info::partial_die_info (sect_offset sect_off_, |
17947 | struct abbrev_info *abbrev) | |
17948 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
17949 | { | |
17950 | } | |
17951 | ||
35cc7ed7 YQ |
17952 | /* Read a minimal amount of information into the minimal die structure. |
17953 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 17954 | |
48fbe735 YQ |
17955 | const gdb_byte * |
17956 | partial_die_info::read (const struct die_reader_specs *reader, | |
17957 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 17958 | { |
dee91e82 | 17959 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
17960 | struct dwarf2_per_objfile *dwarf2_per_objfile |
17961 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 17962 | unsigned int i; |
c5aa993b | 17963 | int has_low_pc_attr = 0; |
c906108c | 17964 | int has_high_pc_attr = 0; |
91da1414 | 17965 | int high_pc_relative = 0; |
c906108c | 17966 | |
18a8505e | 17967 | std::vector<struct attribute> attr_vec (abbrev.num_attrs); |
fd0a254f | 17968 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 17969 | { |
18a8505e AT |
17970 | bool need_reprocess; |
17971 | info_ptr = read_attribute (reader, &attr_vec[i], &abbrev.attrs[i], | |
17972 | info_ptr, &need_reprocess); | |
17973 | /* String and address offsets that need to do the reprocessing have | |
17974 | already been read at this point, so there is no need to wait until | |
17975 | the loop terminates to do the reprocessing. */ | |
17976 | if (need_reprocess) | |
17977 | read_attribute_reprocess (reader, &attr_vec[i]); | |
17978 | attribute &attr = attr_vec[i]; | |
c906108c | 17979 | /* Store the data if it is of an attribute we want to keep in a |
c5aa993b | 17980 | partial symbol table. */ |
c906108c SS |
17981 | switch (attr.name) |
17982 | { | |
17983 | case DW_AT_name: | |
48fbe735 | 17984 | switch (tag) |
71c25dea TT |
17985 | { |
17986 | case DW_TAG_compile_unit: | |
95554aad | 17987 | case DW_TAG_partial_unit: |
348e048f | 17988 | case DW_TAG_type_unit: |
71c25dea TT |
17989 | /* Compilation units have a DW_AT_name that is a filename, not |
17990 | a source language identifier. */ | |
17991 | case DW_TAG_enumeration_type: | |
17992 | case DW_TAG_enumerator: | |
17993 | /* These tags always have simple identifiers already; no need | |
17994 | to canonicalize them. */ | |
48fbe735 | 17995 | name = DW_STRING (&attr); |
71c25dea TT |
17996 | break; |
17997 | default: | |
48fbe735 YQ |
17998 | { |
17999 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18000 | ||
18001 | name | |
be1e3d3e | 18002 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, objfile); |
48fbe735 | 18003 | } |
71c25dea TT |
18004 | break; |
18005 | } | |
c906108c | 18006 | break; |
31ef98ae | 18007 | case DW_AT_linkage_name: |
c906108c | 18008 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18009 | /* Note that both forms of linkage name might appear. We |
18010 | assume they will be the same, and we only store the last | |
18011 | one we see. */ | |
48fbe735 | 18012 | linkage_name = DW_STRING (&attr); |
c906108c SS |
18013 | break; |
18014 | case DW_AT_low_pc: | |
18015 | has_low_pc_attr = 1; | |
cd6c91b4 | 18016 | lowpc = attr.value_as_address (); |
c906108c SS |
18017 | break; |
18018 | case DW_AT_high_pc: | |
18019 | has_high_pc_attr = 1; | |
cd6c91b4 TT |
18020 | highpc = attr.value_as_address (); |
18021 | if (cu->header.version >= 4 && attr.form_is_constant ()) | |
31aa7e4e | 18022 | high_pc_relative = 1; |
c906108c SS |
18023 | break; |
18024 | case DW_AT_location: | |
0963b4bd | 18025 | /* Support the .debug_loc offsets. */ |
4fc6c0d5 | 18026 | if (attr.form_is_block ()) |
8e19ed76 | 18027 | { |
48fbe735 | 18028 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18029 | } |
cd6c91b4 | 18030 | else if (attr.form_is_section_offset ()) |
8e19ed76 | 18031 | { |
4d3c2250 | 18032 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18033 | } |
18034 | else | |
18035 | { | |
4d3c2250 KB |
18036 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18037 | "partial symbol information"); | |
8e19ed76 | 18038 | } |
c906108c | 18039 | break; |
c906108c | 18040 | case DW_AT_external: |
48fbe735 | 18041 | is_external = DW_UNSND (&attr); |
c906108c SS |
18042 | break; |
18043 | case DW_AT_declaration: | |
48fbe735 | 18044 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18045 | break; |
18046 | case DW_AT_type: | |
48fbe735 | 18047 | has_type = 1; |
c906108c SS |
18048 | break; |
18049 | case DW_AT_abstract_origin: | |
18050 | case DW_AT_specification: | |
72bf9492 | 18051 | case DW_AT_extension: |
48fbe735 YQ |
18052 | has_specification = 1; |
18053 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18054 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18055 | || cu->per_cu->is_dwz); |
c906108c SS |
18056 | break; |
18057 | case DW_AT_sibling: | |
18058 | /* Ignore absolute siblings, they might point outside of | |
18059 | the current compile unit. */ | |
18060 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18061 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18062 | else |
b9502d3f | 18063 | { |
48fbe735 | 18064 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18065 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18066 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18067 | |
18068 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18069 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
18070 | else if (sibling_ptr > reader->buffer_end) |
18071 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 18072 | else |
48fbe735 | 18073 | sibling = sibling_ptr; |
b9502d3f | 18074 | } |
c906108c | 18075 | break; |
fa4028e9 | 18076 | case DW_AT_byte_size: |
48fbe735 | 18077 | has_byte_size = 1; |
fa4028e9 | 18078 | break; |
ff908ebf | 18079 | case DW_AT_const_value: |
48fbe735 | 18080 | has_const_value = 1; |
ff908ebf | 18081 | break; |
68511cec CES |
18082 | case DW_AT_calling_convention: |
18083 | /* DWARF doesn't provide a way to identify a program's source-level | |
18084 | entry point. DW_AT_calling_convention attributes are only meant | |
18085 | to describe functions' calling conventions. | |
18086 | ||
18087 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18088 | Fortran, and before DWARF 4 DW_CC_program was the only |
18089 | piece of debugging information whose definition refers to | |
18090 | a 'main program' at all, several compilers marked Fortran | |
18091 | main programs with DW_CC_program --- even when those | |
18092 | functions use the standard calling conventions. | |
18093 | ||
18094 | Although DWARF now specifies a way to provide this | |
18095 | information, we support this practice for backward | |
18096 | compatibility. */ | |
68511cec | 18097 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18098 | && cu->language == language_fortran) |
48fbe735 | 18099 | main_subprogram = 1; |
68511cec | 18100 | break; |
481860b3 GB |
18101 | case DW_AT_inline: |
18102 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18103 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18104 | may_be_inlined = 1; |
481860b3 | 18105 | break; |
95554aad TT |
18106 | |
18107 | case DW_AT_import: | |
48fbe735 | 18108 | if (tag == DW_TAG_imported_unit) |
36586728 | 18109 | { |
48fbe735 YQ |
18110 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18111 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18112 | || cu->per_cu->is_dwz); |
18113 | } | |
95554aad TT |
18114 | break; |
18115 | ||
0c1b455e | 18116 | case DW_AT_main_subprogram: |
48fbe735 | 18117 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18118 | break; |
18119 | ||
05caa1d2 TT |
18120 | case DW_AT_ranges: |
18121 | { | |
18122 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18123 | but that requires a full DIE, so instead we just | |
18124 | reimplement it. */ | |
18125 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18126 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18127 | + (need_ranges_base | |
18128 | ? cu->ranges_base | |
18129 | : 0)); | |
18130 | ||
18131 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18132 | .debug_ranges section. */ | |
18133 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18134 | nullptr)) | |
18135 | has_pc_info = 1; | |
18136 | } | |
18137 | break; | |
18138 | ||
c906108c SS |
18139 | default: |
18140 | break; | |
18141 | } | |
18142 | } | |
18143 | ||
10d06d82 TT |
18144 | /* For Ada, if both the name and the linkage name appear, we prefer |
18145 | the latter. This lets "catch exception" work better, regardless | |
18146 | of the order in which the name and linkage name were emitted. | |
18147 | Really, though, this is just a workaround for the fact that gdb | |
18148 | doesn't store both the name and the linkage name. */ | |
18149 | if (cu->language == language_ada && linkage_name != nullptr) | |
18150 | name = linkage_name; | |
18151 | ||
91da1414 | 18152 | if (high_pc_relative) |
48fbe735 | 18153 | highpc += lowpc; |
91da1414 | 18154 | |
9373cf26 JK |
18155 | if (has_low_pc_attr && has_high_pc_attr) |
18156 | { | |
18157 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18158 | eliminate duplicate copies of functions and vtables and such. | |
18159 | The linker will arbitrarily choose one and discard the others. | |
18160 | The AT_*_pc values for such functions refer to local labels in | |
18161 | these sections. If the section from that file was discarded, the | |
18162 | labels are not in the output, so the relocs get a value of 0. | |
18163 | If this is a discarded function, mark the pc bounds as invalid, | |
18164 | so that GDB will ignore it. */ | |
48fbe735 | 18165 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18166 | { |
48fbe735 | 18167 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18168 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18169 | |
b98664d3 | 18170 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18171 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18172 | paddress (gdbarch, lowpc), |
18173 | sect_offset_str (sect_off), | |
9d8780f0 | 18174 | objfile_name (objfile)); |
9373cf26 JK |
18175 | } |
18176 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18177 | else if (lowpc >= highpc) |
9373cf26 | 18178 | { |
48fbe735 | 18179 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18180 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18181 | |
b98664d3 | 18182 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18183 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18184 | paddress (gdbarch, lowpc), |
18185 | paddress (gdbarch, highpc), | |
18186 | sect_offset_str (sect_off), | |
9c541725 | 18187 | objfile_name (objfile)); |
9373cf26 JK |
18188 | } |
18189 | else | |
48fbe735 | 18190 | has_pc_info = 1; |
9373cf26 | 18191 | } |
85cbf3d3 | 18192 | |
c906108c SS |
18193 | return info_ptr; |
18194 | } | |
18195 | ||
72bf9492 DJ |
18196 | /* Find a cached partial DIE at OFFSET in CU. */ |
18197 | ||
d590ff25 YQ |
18198 | struct partial_die_info * |
18199 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18200 | { |
18201 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18202 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18203 | |
9a3c8263 | 18204 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18205 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18206 | to_underlying (sect_off))); |
72bf9492 | 18207 | |
72bf9492 DJ |
18208 | return lookup_die; |
18209 | } | |
18210 | ||
348e048f DE |
18211 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18212 | except in the case of .debug_types DIEs which do not reference | |
18213 | outside their CU (they do however referencing other types via | |
55f1336d | 18214 | DW_FORM_ref_sig8). */ |
72bf9492 | 18215 | |
122cf0f2 | 18216 | static const struct cu_partial_die_info |
9c541725 | 18217 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18218 | { |
518817b3 SM |
18219 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18220 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18221 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18222 | struct dwarf2_per_cu_data *per_cu = NULL; |
18223 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18224 | |
36586728 | 18225 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 18226 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 18227 | { |
d590ff25 | 18228 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18229 | if (pd != NULL) |
fb816e8b | 18230 | return { cu, pd }; |
0d99eb77 DE |
18231 | /* We missed recording what we needed. |
18232 | Load all dies and try again. */ | |
18233 | per_cu = cu->per_cu; | |
5afb4e99 | 18234 | } |
0d99eb77 DE |
18235 | else |
18236 | { | |
18237 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18238 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18239 | { |
9d8780f0 SM |
18240 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18241 | " external reference to offset %s [in module %s].\n"), | |
18242 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18243 | bfd_get_filename (objfile->obfd)); |
18244 | } | |
9c541725 | 18245 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18246 | dwarf2_per_objfile); |
72bf9492 | 18247 | |
0d99eb77 DE |
18248 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18249 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18250 | |
0d99eb77 | 18251 | per_cu->cu->last_used = 0; |
d590ff25 | 18252 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18253 | } |
5afb4e99 | 18254 | |
dee91e82 DE |
18255 | /* If we didn't find it, and not all dies have been loaded, |
18256 | load them all and try again. */ | |
18257 | ||
5afb4e99 DJ |
18258 | if (pd == NULL && per_cu->load_all_dies == 0) |
18259 | { | |
5afb4e99 | 18260 | per_cu->load_all_dies = 1; |
fd820528 DE |
18261 | |
18262 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18263 | THIS_CU->cu may already be in use. So we can't just free it and | |
18264 | replace its DIEs with the ones we read in. Instead, we leave those | |
18265 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18266 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18267 | set. */ | |
dee91e82 | 18268 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18269 | |
d590ff25 | 18270 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18271 | } |
18272 | ||
18273 | if (pd == NULL) | |
18274 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18275 | _("could not find partial DIE %s " |
3e43a32a | 18276 | "in cache [from module %s]\n"), |
9d8780f0 | 18277 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 18278 | return { per_cu->cu, pd }; |
72bf9492 DJ |
18279 | } |
18280 | ||
abc72ce4 DE |
18281 | /* See if we can figure out if the class lives in a namespace. We do |
18282 | this by looking for a member function; its demangled name will | |
18283 | contain namespace info, if there is any. */ | |
18284 | ||
18285 | static void | |
18286 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18287 | struct dwarf2_cu *cu) | |
18288 | { | |
18289 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18290 | what template types look like, because the demangler | |
18291 | frequently doesn't give the same name as the debug info. We | |
18292 | could fix this by only using the demangled name to get the | |
18293 | prefix (but see comment in read_structure_type). */ | |
18294 | ||
18295 | struct partial_die_info *real_pdi; | |
18296 | struct partial_die_info *child_pdi; | |
18297 | ||
18298 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18299 | we should not do this. We'll prepend the parent's fully qualified | |
18300 | name when we create the partial symbol. */ | |
18301 | ||
18302 | real_pdi = struct_pdi; | |
18303 | while (real_pdi->has_specification) | |
fb816e8b | 18304 | { |
122cf0f2 AB |
18305 | auto res = find_partial_die (real_pdi->spec_offset, |
18306 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
18307 | real_pdi = res.pdi; |
18308 | cu = res.cu; | |
18309 | } | |
abc72ce4 DE |
18310 | |
18311 | if (real_pdi->die_parent != NULL) | |
18312 | return; | |
18313 | ||
18314 | for (child_pdi = struct_pdi->die_child; | |
18315 | child_pdi != NULL; | |
18316 | child_pdi = child_pdi->die_sibling) | |
18317 | { | |
18318 | if (child_pdi->tag == DW_TAG_subprogram | |
18319 | && child_pdi->linkage_name != NULL) | |
18320 | { | |
43816ebc TT |
18321 | gdb::unique_xmalloc_ptr<char> actual_class_name |
18322 | (language_class_name_from_physname (cu->language_defn, | |
18323 | child_pdi->linkage_name)); | |
abc72ce4 DE |
18324 | if (actual_class_name != NULL) |
18325 | { | |
518817b3 | 18326 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18327 | struct_pdi->name = objfile->intern (actual_class_name.get ()); |
abc72ce4 DE |
18328 | } |
18329 | break; | |
18330 | } | |
18331 | } | |
18332 | } | |
18333 | ||
52356b79 YQ |
18334 | void |
18335 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 18336 | { |
abc72ce4 DE |
18337 | /* Once we've fixed up a die, there's no point in doing so again. |
18338 | This also avoids a memory leak if we were to call | |
18339 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 18340 | if (fixup_called) |
abc72ce4 DE |
18341 | return; |
18342 | ||
72bf9492 DJ |
18343 | /* If we found a reference attribute and the DIE has no name, try |
18344 | to find a name in the referred to DIE. */ | |
18345 | ||
52356b79 | 18346 | if (name == NULL && has_specification) |
72bf9492 DJ |
18347 | { |
18348 | struct partial_die_info *spec_die; | |
72bf9492 | 18349 | |
122cf0f2 | 18350 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
18351 | spec_die = res.pdi; |
18352 | cu = res.cu; | |
72bf9492 | 18353 | |
52356b79 | 18354 | spec_die->fixup (cu); |
72bf9492 DJ |
18355 | |
18356 | if (spec_die->name) | |
18357 | { | |
52356b79 | 18358 | name = spec_die->name; |
72bf9492 DJ |
18359 | |
18360 | /* Copy DW_AT_external attribute if it is set. */ | |
18361 | if (spec_die->is_external) | |
52356b79 | 18362 | is_external = spec_die->is_external; |
72bf9492 DJ |
18363 | } |
18364 | } | |
18365 | ||
18366 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 18367 | |
52356b79 YQ |
18368 | if (name == NULL && tag == DW_TAG_namespace) |
18369 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 18370 | |
abc72ce4 DE |
18371 | /* If there is no parent die to provide a namespace, and there are |
18372 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18373 | name. */ |
abc72ce4 | 18374 | if (cu->language == language_cplus |
fd5866f6 | 18375 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
18376 | && die_parent == NULL |
18377 | && has_children | |
18378 | && (tag == DW_TAG_class_type | |
18379 | || tag == DW_TAG_structure_type | |
18380 | || tag == DW_TAG_union_type)) | |
18381 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 18382 | |
53832f31 TT |
18383 | /* GCC might emit a nameless struct or union that has a linkage |
18384 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
18385 | if (name == NULL |
18386 | && (tag == DW_TAG_class_type | |
18387 | || tag == DW_TAG_interface_type | |
18388 | || tag == DW_TAG_structure_type | |
18389 | || tag == DW_TAG_union_type) | |
18390 | && linkage_name != NULL) | |
53832f31 | 18391 | { |
43816ebc TT |
18392 | gdb::unique_xmalloc_ptr<char> demangled |
18393 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
18394 | if (demangled != nullptr) | |
53832f31 | 18395 | { |
96408a79 SA |
18396 | const char *base; |
18397 | ||
18398 | /* Strip any leading namespaces/classes, keep only the base name. | |
18399 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
18400 | base = strrchr (demangled.get (), ':'); |
18401 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
18402 | base++; |
18403 | else | |
43816ebc | 18404 | base = demangled.get (); |
96408a79 | 18405 | |
518817b3 | 18406 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18407 | name = objfile->intern (base); |
53832f31 TT |
18408 | } |
18409 | } | |
18410 | ||
52356b79 | 18411 | fixup_called = 1; |
72bf9492 DJ |
18412 | } |
18413 | ||
18a8505e AT |
18414 | /* Process the attributes that had to be skipped in the first round. These |
18415 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
18416 | They could not have been processed in the first round, because at the time | |
18417 | the values of str_offsets_base or addr_base may not have been known. */ | |
18418 | void read_attribute_reprocess (const struct die_reader_specs *reader, | |
18419 | struct attribute *attr) | |
18420 | { | |
18421 | struct dwarf2_cu *cu = reader->cu; | |
18422 | switch (attr->form) | |
18423 | { | |
18424 | case DW_FORM_addrx: | |
18425 | case DW_FORM_GNU_addr_index: | |
18426 | DW_ADDR (attr) = read_addr_index (cu, DW_UNSND (attr)); | |
18427 | break; | |
18428 | case DW_FORM_strx: | |
18429 | case DW_FORM_strx1: | |
18430 | case DW_FORM_strx2: | |
18431 | case DW_FORM_strx3: | |
18432 | case DW_FORM_strx4: | |
18433 | case DW_FORM_GNU_str_index: | |
18434 | { | |
18435 | unsigned int str_index = DW_UNSND (attr); | |
18436 | if (reader->dwo_file != NULL) | |
18437 | { | |
18438 | DW_STRING (attr) = read_dwo_str_index (reader, str_index); | |
18439 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18440 | } | |
18441 | else | |
18442 | { | |
18443 | DW_STRING (attr) = read_stub_str_index (cu, str_index); | |
18444 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18445 | } | |
18446 | break; | |
18447 | } | |
18448 | default: | |
18449 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
18450 | } | |
18451 | } | |
18452 | ||
a8329558 | 18453 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18454 | |
d521ce57 | 18455 | static const gdb_byte * |
dee91e82 DE |
18456 | read_attribute_value (const struct die_reader_specs *reader, |
18457 | struct attribute *attr, unsigned form, | |
18a8505e AT |
18458 | LONGEST implicit_const, const gdb_byte *info_ptr, |
18459 | bool *need_reprocess) | |
c906108c | 18460 | { |
dee91e82 | 18461 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18462 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18463 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18464 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 18465 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 18466 | bfd *abfd = reader->abfd; |
e7c27a73 | 18467 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18468 | unsigned int bytes_read; |
18469 | struct dwarf_block *blk; | |
18a8505e | 18470 | *need_reprocess = false; |
c906108c | 18471 | |
aead7601 | 18472 | attr->form = (enum dwarf_form) form; |
a8329558 | 18473 | switch (form) |
c906108c | 18474 | { |
c906108c | 18475 | case DW_FORM_ref_addr: |
ae411497 | 18476 | if (cu->header.version == 2) |
c8a7a66f TT |
18477 | DW_UNSND (attr) = cu->header.read_address (abfd, info_ptr, |
18478 | &bytes_read); | |
ae411497 | 18479 | else |
8266302d TT |
18480 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, |
18481 | &bytes_read); | |
ae411497 TT |
18482 | info_ptr += bytes_read; |
18483 | break; | |
36586728 | 18484 | case DW_FORM_GNU_ref_alt: |
8266302d | 18485 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
36586728 TT |
18486 | info_ptr += bytes_read; |
18487 | break; | |
ae411497 | 18488 | case DW_FORM_addr: |
c8a7a66f | 18489 | DW_ADDR (attr) = cu->header.read_address (abfd, info_ptr, &bytes_read); |
3e29f34a | 18490 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 18491 | info_ptr += bytes_read; |
c906108c SS |
18492 | break; |
18493 | case DW_FORM_block2: | |
7b5a2f43 | 18494 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18495 | blk->size = read_2_bytes (abfd, info_ptr); |
18496 | info_ptr += 2; | |
18497 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18498 | info_ptr += blk->size; | |
18499 | DW_BLOCK (attr) = blk; | |
18500 | break; | |
18501 | case DW_FORM_block4: | |
7b5a2f43 | 18502 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18503 | blk->size = read_4_bytes (abfd, info_ptr); |
18504 | info_ptr += 4; | |
18505 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18506 | info_ptr += blk->size; | |
18507 | DW_BLOCK (attr) = blk; | |
18508 | break; | |
18509 | case DW_FORM_data2: | |
18510 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18511 | info_ptr += 2; | |
18512 | break; | |
18513 | case DW_FORM_data4: | |
18514 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18515 | info_ptr += 4; | |
18516 | break; | |
18517 | case DW_FORM_data8: | |
18518 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18519 | info_ptr += 8; | |
18520 | break; | |
0224619f JK |
18521 | case DW_FORM_data16: |
18522 | blk = dwarf_alloc_block (cu); | |
18523 | blk->size = 16; | |
18524 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18525 | info_ptr += 16; | |
18526 | DW_BLOCK (attr) = blk; | |
18527 | break; | |
2dc7f7b3 | 18528 | case DW_FORM_sec_offset: |
8266302d | 18529 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
2dc7f7b3 TT |
18530 | info_ptr += bytes_read; |
18531 | break; | |
c906108c | 18532 | case DW_FORM_string: |
9b1c24c8 | 18533 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 18534 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
18535 | info_ptr += bytes_read; |
18536 | break; | |
4bdf3d34 | 18537 | case DW_FORM_strp: |
36586728 TT |
18538 | if (!cu->per_cu->is_dwz) |
18539 | { | |
ed2dc618 SM |
18540 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
18541 | abfd, info_ptr, cu_header, | |
36586728 TT |
18542 | &bytes_read); |
18543 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18544 | info_ptr += bytes_read; | |
18545 | break; | |
18546 | } | |
18547 | /* FALLTHROUGH */ | |
43988095 JK |
18548 | case DW_FORM_line_strp: |
18549 | if (!cu->per_cu->is_dwz) | |
18550 | { | |
ed2dc618 SM |
18551 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
18552 | abfd, info_ptr, | |
43988095 JK |
18553 | cu_header, &bytes_read); |
18554 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18555 | info_ptr += bytes_read; | |
18556 | break; | |
18557 | } | |
18558 | /* FALLTHROUGH */ | |
36586728 TT |
18559 | case DW_FORM_GNU_strp_alt: |
18560 | { | |
ed2dc618 | 18561 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
8266302d TT |
18562 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
18563 | &bytes_read); | |
36586728 | 18564 | |
ed2dc618 SM |
18565 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
18566 | dwz, str_offset); | |
36586728 TT |
18567 | DW_STRING_IS_CANONICAL (attr) = 0; |
18568 | info_ptr += bytes_read; | |
18569 | } | |
4bdf3d34 | 18570 | break; |
2dc7f7b3 | 18571 | case DW_FORM_exprloc: |
c906108c | 18572 | case DW_FORM_block: |
7b5a2f43 | 18573 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18574 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18575 | info_ptr += bytes_read; | |
18576 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18577 | info_ptr += blk->size; | |
18578 | DW_BLOCK (attr) = blk; | |
18579 | break; | |
18580 | case DW_FORM_block1: | |
7b5a2f43 | 18581 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18582 | blk->size = read_1_byte (abfd, info_ptr); |
18583 | info_ptr += 1; | |
18584 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18585 | info_ptr += blk->size; | |
18586 | DW_BLOCK (attr) = blk; | |
18587 | break; | |
18588 | case DW_FORM_data1: | |
18589 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18590 | info_ptr += 1; | |
18591 | break; | |
18592 | case DW_FORM_flag: | |
18593 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18594 | info_ptr += 1; | |
18595 | break; | |
2dc7f7b3 TT |
18596 | case DW_FORM_flag_present: |
18597 | DW_UNSND (attr) = 1; | |
18598 | break; | |
c906108c SS |
18599 | case DW_FORM_sdata: |
18600 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18601 | info_ptr += bytes_read; | |
18602 | break; | |
18603 | case DW_FORM_udata: | |
18a8505e | 18604 | case DW_FORM_rnglistx: |
c906108c SS |
18605 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18606 | info_ptr += bytes_read; | |
18607 | break; | |
18608 | case DW_FORM_ref1: | |
9c541725 | 18609 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18610 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
18611 | info_ptr += 1; |
18612 | break; | |
18613 | case DW_FORM_ref2: | |
9c541725 | 18614 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18615 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
18616 | info_ptr += 2; |
18617 | break; | |
18618 | case DW_FORM_ref4: | |
9c541725 | 18619 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18620 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
18621 | info_ptr += 4; |
18622 | break; | |
613e1657 | 18623 | case DW_FORM_ref8: |
9c541725 | 18624 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18625 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
18626 | info_ptr += 8; |
18627 | break; | |
55f1336d | 18628 | case DW_FORM_ref_sig8: |
ac9ec31b | 18629 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
18630 | info_ptr += 8; |
18631 | break; | |
c906108c | 18632 | case DW_FORM_ref_udata: |
9c541725 | 18633 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18634 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
18635 | info_ptr += bytes_read; |
18636 | break; | |
c906108c | 18637 | case DW_FORM_indirect: |
a8329558 KW |
18638 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18639 | info_ptr += bytes_read; | |
43988095 JK |
18640 | if (form == DW_FORM_implicit_const) |
18641 | { | |
18642 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18643 | info_ptr += bytes_read; | |
18644 | } | |
18645 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
18a8505e | 18646 | info_ptr, need_reprocess); |
43988095 JK |
18647 | break; |
18648 | case DW_FORM_implicit_const: | |
18649 | DW_SND (attr) = implicit_const; | |
a8329558 | 18650 | break; |
336d760d | 18651 | case DW_FORM_addrx: |
3019eac3 | 18652 | case DW_FORM_GNU_addr_index: |
18a8505e AT |
18653 | *need_reprocess = true; |
18654 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
3019eac3 DE |
18655 | info_ptr += bytes_read; |
18656 | break; | |
cf532bd1 | 18657 | case DW_FORM_strx: |
15f18d14 AT |
18658 | case DW_FORM_strx1: |
18659 | case DW_FORM_strx2: | |
18660 | case DW_FORM_strx3: | |
18661 | case DW_FORM_strx4: | |
3019eac3 | 18662 | case DW_FORM_GNU_str_index: |
3019eac3 | 18663 | { |
15f18d14 AT |
18664 | ULONGEST str_index; |
18665 | if (form == DW_FORM_strx1) | |
18666 | { | |
18667 | str_index = read_1_byte (abfd, info_ptr); | |
18668 | info_ptr += 1; | |
18669 | } | |
18670 | else if (form == DW_FORM_strx2) | |
18671 | { | |
18672 | str_index = read_2_bytes (abfd, info_ptr); | |
18673 | info_ptr += 2; | |
18674 | } | |
18675 | else if (form == DW_FORM_strx3) | |
18676 | { | |
18677 | str_index = read_3_bytes (abfd, info_ptr); | |
18678 | info_ptr += 3; | |
18679 | } | |
18680 | else if (form == DW_FORM_strx4) | |
18681 | { | |
18682 | str_index = read_4_bytes (abfd, info_ptr); | |
18683 | info_ptr += 4; | |
18684 | } | |
18685 | else | |
18686 | { | |
18687 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
18688 | info_ptr += bytes_read; | |
18689 | } | |
18a8505e AT |
18690 | *need_reprocess = true; |
18691 | DW_UNSND (attr) = str_index; | |
18692 | } | |
3019eac3 | 18693 | break; |
c906108c | 18694 | default: |
8a3fe4f8 | 18695 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
18696 | dwarf_form_name (form), |
18697 | bfd_get_filename (abfd)); | |
c906108c | 18698 | } |
28e94949 | 18699 | |
36586728 | 18700 | /* Super hack. */ |
cd6c91b4 | 18701 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
18702 | attr->form = DW_FORM_GNU_ref_alt; |
18703 | ||
28e94949 JB |
18704 | /* We have seen instances where the compiler tried to emit a byte |
18705 | size attribute of -1 which ended up being encoded as an unsigned | |
18706 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
18707 | an object of this size seems pretty unlikely so we can relatively | |
18708 | safely treat these cases as if the size attribute was invalid and | |
18709 | treat them as zero by default. */ | |
18710 | if (attr->name == DW_AT_byte_size | |
18711 | && form == DW_FORM_data4 | |
18712 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
18713 | { |
18714 | complaint | |
b98664d3 | 18715 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 18716 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
18717 | DW_UNSND (attr) = 0; |
18718 | } | |
28e94949 | 18719 | |
c906108c SS |
18720 | return info_ptr; |
18721 | } | |
18722 | ||
a8329558 KW |
18723 | /* Read an attribute described by an abbreviated attribute. */ |
18724 | ||
d521ce57 | 18725 | static const gdb_byte * |
dee91e82 DE |
18726 | read_attribute (const struct die_reader_specs *reader, |
18727 | struct attribute *attr, struct attr_abbrev *abbrev, | |
18a8505e | 18728 | const gdb_byte *info_ptr, bool *need_reprocess) |
a8329558 KW |
18729 | { |
18730 | attr->name = abbrev->name; | |
43988095 | 18731 | return read_attribute_value (reader, attr, abbrev->form, |
18a8505e AT |
18732 | abbrev->implicit_const, info_ptr, |
18733 | need_reprocess); | |
a8329558 KW |
18734 | } |
18735 | ||
c764a876 DE |
18736 | /* Cover function for read_initial_length. |
18737 | Returns the length of the object at BUF, and stores the size of the | |
18738 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18739 | *OFFSET_SIZE. | |
18740 | If the initial length size is not equivalent to that specified in | |
18741 | CU_HEADER then issue a complaint. | |
18742 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18743 | |
c764a876 | 18744 | static LONGEST |
d521ce57 | 18745 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18746 | const struct comp_unit_head *cu_header, |
18747 | unsigned int *bytes_read, | |
18748 | unsigned int *offset_size) | |
18749 | { | |
18750 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18751 | ||
18752 | gdb_assert (cu_header->initial_length_size == 4 | |
18753 | || cu_header->initial_length_size == 8 | |
18754 | || cu_header->initial_length_size == 12); | |
18755 | ||
18756 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 18757 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 18758 | |
c764a876 | 18759 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18760 | return length; |
613e1657 KB |
18761 | } |
18762 | ||
43988095 JK |
18763 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
18764 | reporting strings FORM_NAME and SECT_NAME. */ | |
18765 | ||
d521ce57 | 18766 | static const char * |
ed2dc618 SM |
18767 | read_indirect_string_at_offset_from (struct objfile *objfile, |
18768 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
18769 | struct dwarf2_section_info *sect, |
18770 | const char *form_name, | |
18771 | const char *sect_name) | |
18772 | { | |
96b79293 | 18773 | sect->read (objfile); |
43988095 JK |
18774 | if (sect->buffer == NULL) |
18775 | error (_("%s used without %s section [in module %s]"), | |
18776 | form_name, sect_name, bfd_get_filename (abfd)); | |
18777 | if (str_offset >= sect->size) | |
18778 | error (_("%s pointing outside of %s section [in module %s]"), | |
18779 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 18780 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 18781 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 18782 | return NULL; |
43988095 JK |
18783 | return (const char *) (sect->buffer + str_offset); |
18784 | } | |
18785 | ||
18786 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
18787 | ||
18788 | static const char * | |
ed2dc618 SM |
18789 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18790 | bfd *abfd, LONGEST str_offset) | |
43988095 | 18791 | { |
ed2dc618 SM |
18792 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
18793 | abfd, str_offset, | |
43988095 JK |
18794 | &dwarf2_per_objfile->str, |
18795 | "DW_FORM_strp", ".debug_str"); | |
18796 | } | |
18797 | ||
18798 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
18799 | ||
18800 | static const char * | |
ed2dc618 SM |
18801 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18802 | bfd *abfd, LONGEST str_offset) | |
43988095 | 18803 | { |
ed2dc618 SM |
18804 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
18805 | abfd, str_offset, | |
43988095 JK |
18806 | &dwarf2_per_objfile->line_str, |
18807 | "DW_FORM_line_strp", | |
18808 | ".debug_line_str"); | |
c906108c SS |
18809 | } |
18810 | ||
36586728 TT |
18811 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
18812 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
18813 | the string consists of a single NUL byte, return NULL; otherwise | |
18814 | return a pointer to the string. */ | |
18815 | ||
d521ce57 | 18816 | static const char * |
ed2dc618 SM |
18817 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
18818 | LONGEST str_offset) | |
36586728 | 18819 | { |
96b79293 | 18820 | dwz->str.read (objfile); |
36586728 TT |
18821 | |
18822 | if (dwz->str.buffer == NULL) | |
18823 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
18824 | "section [in module %s]"), | |
00f93c44 | 18825 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
18826 | if (str_offset >= dwz->str.size) |
18827 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
18828 | ".debug_str section [in module %s]"), | |
00f93c44 | 18829 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
18830 | gdb_assert (HOST_CHAR_BIT == 8); |
18831 | if (dwz->str.buffer[str_offset] == '\0') | |
18832 | return NULL; | |
d521ce57 | 18833 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
18834 | } |
18835 | ||
43988095 JK |
18836 | /* Return pointer to string at .debug_str offset as read from BUF. |
18837 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18838 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18839 | ||
d521ce57 | 18840 | static const char * |
ed2dc618 SM |
18841 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
18842 | const gdb_byte *buf, | |
cf2c3c16 TT |
18843 | const struct comp_unit_head *cu_header, |
18844 | unsigned int *bytes_read_ptr) | |
18845 | { | |
8266302d | 18846 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 18847 | |
ed2dc618 | 18848 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
18849 | } |
18850 | ||
43988095 JK |
18851 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
18852 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18853 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18854 | ||
18855 | static const char * | |
ed2dc618 SM |
18856 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18857 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
18858 | const struct comp_unit_head *cu_header, |
18859 | unsigned int *bytes_read_ptr) | |
18860 | { | |
8266302d | 18861 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 18862 | |
ed2dc618 SM |
18863 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
18864 | str_offset); | |
43988095 JK |
18865 | } |
18866 | ||
3019eac3 | 18867 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 18868 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
18869 | ADDR_SIZE is the size of addresses from the CU header. */ |
18870 | ||
18871 | static CORE_ADDR | |
ed2dc618 | 18872 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e AT |
18873 | unsigned int addr_index, gdb::optional<ULONGEST> addr_base, |
18874 | int addr_size) | |
3019eac3 DE |
18875 | { |
18876 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18877 | bfd *abfd = objfile->obfd; | |
18878 | const gdb_byte *info_ptr; | |
18a8505e | 18879 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 18880 | |
96b79293 | 18881 | dwarf2_per_objfile->addr.read (objfile); |
3019eac3 DE |
18882 | if (dwarf2_per_objfile->addr.buffer == NULL) |
18883 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18884 | objfile_name (objfile)); |
18a8505e AT |
18885 | if (addr_base_or_zero + addr_index * addr_size |
18886 | >= dwarf2_per_objfile->addr.size) | |
3019eac3 DE |
18887 | error (_("DW_FORM_addr_index pointing outside of " |
18888 | ".debug_addr section [in module %s]"), | |
4262abfb | 18889 | objfile_name (objfile)); |
3019eac3 | 18890 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18a8505e | 18891 | + addr_base_or_zero + addr_index * addr_size); |
3019eac3 DE |
18892 | if (addr_size == 4) |
18893 | return bfd_get_32 (abfd, info_ptr); | |
18894 | else | |
18895 | return bfd_get_64 (abfd, info_ptr); | |
18896 | } | |
18897 | ||
18898 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18899 | ||
18900 | static CORE_ADDR | |
18901 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18902 | { | |
518817b3 SM |
18903 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
18904 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
18905 | } |
18906 | ||
18907 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18908 | ||
18909 | static CORE_ADDR | |
d521ce57 | 18910 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18911 | unsigned int *bytes_read) |
18912 | { | |
518817b3 | 18913 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
18914 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
18915 | ||
18916 | return read_addr_index (cu, addr_index); | |
18917 | } | |
18918 | ||
450a1bfc | 18919 | /* See read.h. */ |
3019eac3 DE |
18920 | |
18921 | CORE_ADDR | |
450a1bfc | 18922 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, unsigned int addr_index) |
3019eac3 | 18923 | { |
ed2dc618 | 18924 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 18925 | struct dwarf2_cu *cu = per_cu->cu; |
18a8505e | 18926 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
18927 | int addr_size; |
18928 | ||
3019eac3 DE |
18929 | /* We need addr_base and addr_size. |
18930 | If we don't have PER_CU->cu, we have to get it. | |
18931 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18932 | which at this point doesn't seem justified: it's not clear how frequently | |
18933 | it would get used and it would increase the size of every PER_CU. | |
18934 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18935 | so we're not in uncharted territory here. | |
18936 | Alas we need to be a bit more complicated as addr_base is contained | |
18937 | in the DIE. | |
18938 | ||
18939 | We don't need to read the entire CU(/TU). | |
18940 | We just need the header and top level die. | |
a1b64ce1 | 18941 | |
3019eac3 | 18942 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18943 | For now we skip this optimization. */ |
3019eac3 DE |
18944 | |
18945 | if (cu != NULL) | |
18946 | { | |
18947 | addr_base = cu->addr_base; | |
18948 | addr_size = cu->header.addr_size; | |
18949 | } | |
18950 | else | |
18951 | { | |
6751ebae | 18952 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
18953 | addr_base = reader.cu->addr_base; |
18954 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
18955 | } |
18956 | ||
ed2dc618 SM |
18957 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
18958 | addr_size); | |
3019eac3 DE |
18959 | } |
18960 | ||
18a8505e AT |
18961 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
18962 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
18963 | DWO file. */ | |
3019eac3 | 18964 | |
d521ce57 | 18965 | static const char * |
18a8505e AT |
18966 | read_str_index (struct dwarf2_cu *cu, |
18967 | struct dwarf2_section_info *str_section, | |
18968 | struct dwarf2_section_info *str_offsets_section, | |
18969 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 18970 | { |
518817b3 SM |
18971 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18972 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 18973 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 18974 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18975 | bfd *abfd = objfile->obfd; |
d521ce57 | 18976 | const gdb_byte *info_ptr; |
3019eac3 | 18977 | ULONGEST str_offset; |
cf532bd1 | 18978 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 18979 | |
96b79293 TT |
18980 | str_section->read (objfile); |
18981 | str_offsets_section->read (objfile); | |
73869dc2 | 18982 | if (str_section->buffer == NULL) |
18a8505e | 18983 | error (_("%s used without %s section" |
9d8780f0 | 18984 | " in CU at offset %s [in module %s]"), |
96b79293 | 18985 | form_name, str_section->get_name (), |
18a8505e | 18986 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18987 | if (str_offsets_section->buffer == NULL) |
18a8505e | 18988 | error (_("%s used without %s section" |
9d8780f0 | 18989 | " in CU at offset %s [in module %s]"), |
96b79293 | 18990 | form_name, str_section->get_name (), |
18a8505e | 18991 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18992 | info_ptr = (str_offsets_section->buffer |
18a8505e | 18993 | + str_offsets_base |
3019eac3 DE |
18994 | + str_index * cu->header.offset_size); |
18995 | if (cu->header.offset_size == 4) | |
18996 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18997 | else | |
18998 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18999 | if (str_offset >= str_section->size) |
57d63ce2 | 19000 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
19001 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
19002 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19003 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
19004 | } |
19005 | ||
18a8505e AT |
19006 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
19007 | ||
19008 | static const char * | |
19009 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
19010 | { | |
19011 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
19012 | ? reader->cu->header.addr_size : 0; | |
19013 | return read_str_index (reader->cu, | |
19014 | &reader->dwo_file->sections.str, | |
19015 | &reader->dwo_file->sections.str_offsets, | |
19016 | str_offsets_base, str_index); | |
19017 | } | |
19018 | ||
19019 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
19020 | ||
19021 | static const char * | |
19022 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
19023 | { | |
19024 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; | |
19025 | const char *objf_name = objfile_name (objfile); | |
19026 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
19027 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
19028 | ||
19029 | if (!cu->str_offsets_base.has_value ()) | |
19030 | error (_("%s used in Fission stub without %s" | |
19031 | " in CU at offset 0x%lx [in module %s]"), | |
19032 | form_name, str_offsets_attr_name, | |
19033 | (long) cu->header.offset_size, objf_name); | |
19034 | ||
19035 | return read_str_index (cu, | |
19036 | &cu->per_cu->dwarf2_per_objfile->str, | |
19037 | &cu->per_cu->dwarf2_per_objfile->str_offsets, | |
19038 | *cu->str_offsets_base, str_index); | |
19039 | } | |
19040 | ||
3019eac3 DE |
19041 | /* Return the length of an LEB128 number in BUF. */ |
19042 | ||
19043 | static int | |
19044 | leb128_size (const gdb_byte *buf) | |
19045 | { | |
19046 | const gdb_byte *begin = buf; | |
19047 | gdb_byte byte; | |
19048 | ||
19049 | while (1) | |
19050 | { | |
19051 | byte = *buf++; | |
19052 | if ((byte & 128) == 0) | |
19053 | return buf - begin; | |
19054 | } | |
19055 | } | |
19056 | ||
c906108c | 19057 | static void |
e142c38c | 19058 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
19059 | { |
19060 | switch (lang) | |
19061 | { | |
19062 | case DW_LANG_C89: | |
76bee0cc | 19063 | case DW_LANG_C99: |
0cfd832f | 19064 | case DW_LANG_C11: |
c906108c | 19065 | case DW_LANG_C: |
d1be3247 | 19066 | case DW_LANG_UPC: |
e142c38c | 19067 | cu->language = language_c; |
c906108c | 19068 | break; |
9c37b5ae | 19069 | case DW_LANG_Java: |
c906108c | 19070 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19071 | case DW_LANG_C_plus_plus_11: |
19072 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19073 | cu->language = language_cplus; |
c906108c | 19074 | break; |
6aecb9c2 JB |
19075 | case DW_LANG_D: |
19076 | cu->language = language_d; | |
19077 | break; | |
c906108c SS |
19078 | case DW_LANG_Fortran77: |
19079 | case DW_LANG_Fortran90: | |
b21b22e0 | 19080 | case DW_LANG_Fortran95: |
f7de9aab MW |
19081 | case DW_LANG_Fortran03: |
19082 | case DW_LANG_Fortran08: | |
e142c38c | 19083 | cu->language = language_fortran; |
c906108c | 19084 | break; |
a766d390 DE |
19085 | case DW_LANG_Go: |
19086 | cu->language = language_go; | |
19087 | break; | |
c906108c | 19088 | case DW_LANG_Mips_Assembler: |
e142c38c | 19089 | cu->language = language_asm; |
c906108c SS |
19090 | break; |
19091 | case DW_LANG_Ada83: | |
8aaf0b47 | 19092 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19093 | cu->language = language_ada; |
19094 | break; | |
72019c9c GM |
19095 | case DW_LANG_Modula2: |
19096 | cu->language = language_m2; | |
19097 | break; | |
fe8e67fd PM |
19098 | case DW_LANG_Pascal83: |
19099 | cu->language = language_pascal; | |
19100 | break; | |
22566fbd DJ |
19101 | case DW_LANG_ObjC: |
19102 | cu->language = language_objc; | |
19103 | break; | |
c44af4eb TT |
19104 | case DW_LANG_Rust: |
19105 | case DW_LANG_Rust_old: | |
19106 | cu->language = language_rust; | |
19107 | break; | |
c906108c SS |
19108 | case DW_LANG_Cobol74: |
19109 | case DW_LANG_Cobol85: | |
c906108c | 19110 | default: |
e142c38c | 19111 | cu->language = language_minimal; |
c906108c SS |
19112 | break; |
19113 | } | |
e142c38c | 19114 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19115 | } |
19116 | ||
19117 | /* Return the named attribute or NULL if not there. */ | |
19118 | ||
19119 | static struct attribute * | |
e142c38c | 19120 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19121 | { |
a48e046c | 19122 | for (;;) |
c906108c | 19123 | { |
a48e046c TT |
19124 | unsigned int i; |
19125 | struct attribute *spec = NULL; | |
19126 | ||
19127 | for (i = 0; i < die->num_attrs; ++i) | |
19128 | { | |
19129 | if (die->attrs[i].name == name) | |
19130 | return &die->attrs[i]; | |
19131 | if (die->attrs[i].name == DW_AT_specification | |
19132 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19133 | spec = &die->attrs[i]; | |
19134 | } | |
19135 | ||
19136 | if (!spec) | |
19137 | break; | |
c906108c | 19138 | |
f2f0e013 | 19139 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19140 | } |
c5aa993b | 19141 | |
c906108c SS |
19142 | return NULL; |
19143 | } | |
19144 | ||
348e048f DE |
19145 | /* Return the named attribute or NULL if not there, |
19146 | but do not follow DW_AT_specification, etc. | |
19147 | This is for use in contexts where we're reading .debug_types dies. | |
19148 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
19149 | back up the chain, and we want to go down. */ | |
19150 | ||
19151 | static struct attribute * | |
45e58e77 | 19152 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
19153 | { |
19154 | unsigned int i; | |
19155 | ||
19156 | for (i = 0; i < die->num_attrs; ++i) | |
19157 | if (die->attrs[i].name == name) | |
19158 | return &die->attrs[i]; | |
19159 | ||
19160 | return NULL; | |
19161 | } | |
19162 | ||
7d45c7c3 KB |
19163 | /* Return the string associated with a string-typed attribute, or NULL if it |
19164 | is either not found or is of an incorrect type. */ | |
19165 | ||
19166 | static const char * | |
19167 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19168 | { | |
19169 | struct attribute *attr; | |
19170 | const char *str = NULL; | |
19171 | ||
19172 | attr = dwarf2_attr (die, name, cu); | |
19173 | ||
19174 | if (attr != NULL) | |
19175 | { | |
43988095 | 19176 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 19177 | || attr->form == DW_FORM_string |
cf532bd1 | 19178 | || attr->form == DW_FORM_strx |
8fe0f950 AT |
19179 | || attr->form == DW_FORM_strx1 |
19180 | || attr->form == DW_FORM_strx2 | |
19181 | || attr->form == DW_FORM_strx3 | |
19182 | || attr->form == DW_FORM_strx4 | |
b3340438 | 19183 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 19184 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
19185 | str = DW_STRING (attr); |
19186 | else | |
b98664d3 | 19187 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
19188 | "DIE at %s in module %s"), |
19189 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 19190 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
19191 | } |
19192 | ||
19193 | return str; | |
19194 | } | |
19195 | ||
a084a2a6 | 19196 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 19197 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
19198 | static const char * |
19199 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
19200 | { | |
19201 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
19202 | if (dwo_name == nullptr) | |
19203 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
19204 | return dwo_name; | |
19205 | } | |
19206 | ||
05cf31d1 JB |
19207 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19208 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19209 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19210 | |
19211 | static int | |
19212 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19213 | { | |
19214 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19215 | ||
19216 | return (attr && DW_UNSND (attr)); | |
19217 | } | |
19218 | ||
3ca72b44 | 19219 | static int |
e142c38c | 19220 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19221 | { |
05cf31d1 JB |
19222 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19223 | which value is non-zero. However, we have to be careful with | |
19224 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19225 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19226 | end up accidently finding a declaration attribute that belongs | |
19227 | to a different DIE referenced by the specification attribute, | |
19228 | even though the given DIE does not have a declaration attribute. */ | |
19229 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19230 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19231 | } |
19232 | ||
63d06c5c | 19233 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19234 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19235 | containing the return value on output. If there is no |
19236 | specification, but there is an abstract origin, that is | |
19237 | returned. */ | |
63d06c5c DC |
19238 | |
19239 | static struct die_info * | |
f2f0e013 | 19240 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19241 | { |
f2f0e013 DJ |
19242 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19243 | *spec_cu); | |
63d06c5c | 19244 | |
edb3359d DJ |
19245 | if (spec_attr == NULL) |
19246 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19247 | ||
63d06c5c DC |
19248 | if (spec_attr == NULL) |
19249 | return NULL; | |
19250 | else | |
f2f0e013 | 19251 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19252 | } |
c906108c | 19253 | |
527f3840 JK |
19254 | /* Stub for free_line_header to match void * callback types. */ |
19255 | ||
19256 | static void | |
19257 | free_line_header_voidp (void *arg) | |
19258 | { | |
9a3c8263 | 19259 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19260 | |
fff8551c | 19261 | delete lh; |
527f3840 JK |
19262 | } |
19263 | ||
83769d0b | 19264 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19265 | |
19266 | static struct dwarf2_section_info * | |
19267 | get_debug_line_section (struct dwarf2_cu *cu) | |
19268 | { | |
19269 | struct dwarf2_section_info *section; | |
518817b3 SM |
19270 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19271 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
19272 | |
19273 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19274 | DWO file. */ | |
19275 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19276 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19277 | else if (cu->per_cu->is_dwz) | |
19278 | { | |
ed2dc618 | 19279 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19280 | |
19281 | section = &dwz->line; | |
19282 | } | |
19283 | else | |
19284 | section = &dwarf2_per_objfile->line; | |
19285 | ||
19286 | return section; | |
19287 | } | |
19288 | ||
43988095 JK |
19289 | /* Read directory or file name entry format, starting with byte of |
19290 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
19291 | entries count and the entries themselves in the described entry | |
19292 | format. */ | |
19293 | ||
19294 | static void | |
ed2dc618 SM |
19295 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19296 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
19297 | struct line_header *lh, |
19298 | const struct comp_unit_head *cu_header, | |
19299 | void (*callback) (struct line_header *lh, | |
19300 | const char *name, | |
ecfb656c | 19301 | dir_index d_index, |
43988095 JK |
19302 | unsigned int mod_time, |
19303 | unsigned int length)) | |
19304 | { | |
19305 | gdb_byte format_count, formati; | |
19306 | ULONGEST data_count, datai; | |
19307 | const gdb_byte *buf = *bufp; | |
19308 | const gdb_byte *format_header_data; | |
43988095 JK |
19309 | unsigned int bytes_read; |
19310 | ||
19311 | format_count = read_1_byte (abfd, buf); | |
19312 | buf += 1; | |
19313 | format_header_data = buf; | |
19314 | for (formati = 0; formati < format_count; formati++) | |
19315 | { | |
19316 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19317 | buf += bytes_read; | |
19318 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19319 | buf += bytes_read; | |
19320 | } | |
19321 | ||
19322 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19323 | buf += bytes_read; | |
19324 | for (datai = 0; datai < data_count; datai++) | |
19325 | { | |
19326 | const gdb_byte *format = format_header_data; | |
19327 | struct file_entry fe; | |
19328 | ||
43988095 JK |
19329 | for (formati = 0; formati < format_count; formati++) |
19330 | { | |
ecfb656c | 19331 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19332 | format += bytes_read; |
43988095 | 19333 | |
ecfb656c | 19334 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19335 | format += bytes_read; |
ecfb656c PA |
19336 | |
19337 | gdb::optional<const char *> string; | |
19338 | gdb::optional<unsigned int> uint; | |
19339 | ||
43988095 JK |
19340 | switch (form) |
19341 | { | |
19342 | case DW_FORM_string: | |
ecfb656c | 19343 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
19344 | buf += bytes_read; |
19345 | break; | |
19346 | ||
19347 | case DW_FORM_line_strp: | |
ed2dc618 SM |
19348 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
19349 | abfd, buf, | |
ecfb656c PA |
19350 | cu_header, |
19351 | &bytes_read)); | |
43988095 JK |
19352 | buf += bytes_read; |
19353 | break; | |
19354 | ||
19355 | case DW_FORM_data1: | |
ecfb656c | 19356 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
19357 | buf += 1; |
19358 | break; | |
19359 | ||
19360 | case DW_FORM_data2: | |
ecfb656c | 19361 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
19362 | buf += 2; |
19363 | break; | |
19364 | ||
19365 | case DW_FORM_data4: | |
ecfb656c | 19366 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
19367 | buf += 4; |
19368 | break; | |
19369 | ||
19370 | case DW_FORM_data8: | |
ecfb656c | 19371 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
19372 | buf += 8; |
19373 | break; | |
19374 | ||
7ba99d21 AT |
19375 | case DW_FORM_data16: |
19376 | /* This is used for MD5, but file_entry does not record MD5s. */ | |
19377 | buf += 16; | |
19378 | break; | |
19379 | ||
43988095 | 19380 | case DW_FORM_udata: |
ecfb656c | 19381 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
19382 | buf += bytes_read; |
19383 | break; | |
19384 | ||
19385 | case DW_FORM_block: | |
19386 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
19387 | current GDB. */ | |
19388 | break; | |
19389 | } | |
ecfb656c PA |
19390 | |
19391 | switch (content_type) | |
19392 | { | |
19393 | case DW_LNCT_path: | |
19394 | if (string.has_value ()) | |
19395 | fe.name = *string; | |
19396 | break; | |
19397 | case DW_LNCT_directory_index: | |
19398 | if (uint.has_value ()) | |
19399 | fe.d_index = (dir_index) *uint; | |
19400 | break; | |
19401 | case DW_LNCT_timestamp: | |
19402 | if (uint.has_value ()) | |
19403 | fe.mod_time = *uint; | |
19404 | break; | |
19405 | case DW_LNCT_size: | |
19406 | if (uint.has_value ()) | |
19407 | fe.length = *uint; | |
19408 | break; | |
19409 | case DW_LNCT_MD5: | |
19410 | break; | |
19411 | default: | |
b98664d3 | 19412 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
19413 | pulongest (content_type)); |
19414 | } | |
43988095 JK |
19415 | } |
19416 | ||
ecfb656c | 19417 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
19418 | } |
19419 | ||
19420 | *bufp = buf; | |
19421 | } | |
19422 | ||
debd256d | 19423 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 19424 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 19425 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
19426 | Returns NULL if there is a problem reading the header, e.g., if it |
19427 | has a version we don't understand. | |
debd256d JB |
19428 | |
19429 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
19430 | the returned object point into the dwarf line section buffer, |
19431 | and must not be freed. */ | |
ae2de4f8 | 19432 | |
fff8551c | 19433 | static line_header_up |
9c541725 | 19434 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 19435 | { |
d521ce57 | 19436 | const gdb_byte *line_ptr; |
c764a876 | 19437 | unsigned int bytes_read, offset_size; |
debd256d | 19438 | int i; |
d521ce57 | 19439 | const char *cur_dir, *cur_file; |
3019eac3 DE |
19440 | struct dwarf2_section_info *section; |
19441 | bfd *abfd; | |
518817b3 SM |
19442 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19443 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19444 | |
36586728 | 19445 | section = get_debug_line_section (cu); |
96b79293 | 19446 | section->read (dwarf2_per_objfile->objfile); |
3019eac3 | 19447 | if (section->buffer == NULL) |
debd256d | 19448 | { |
3019eac3 | 19449 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 19450 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 19451 | else |
b98664d3 | 19452 | complaint (_("missing .debug_line section")); |
debd256d JB |
19453 | return 0; |
19454 | } | |
19455 | ||
fceca515 DE |
19456 | /* We can't do this until we know the section is non-empty. |
19457 | Only then do we know we have such a section. */ | |
96b79293 | 19458 | abfd = section->get_bfd_owner (); |
fceca515 | 19459 | |
a738430d MK |
19460 | /* Make sure that at least there's room for the total_length field. |
19461 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 19462 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 19463 | { |
4d3c2250 | 19464 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19465 | return 0; |
19466 | } | |
19467 | ||
fff8551c | 19468 | line_header_up lh (new line_header ()); |
debd256d | 19469 | |
9c541725 | 19470 | lh->sect_off = sect_off; |
527f3840 JK |
19471 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
19472 | ||
9c541725 | 19473 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 19474 | |
a738430d | 19475 | /* Read in the header. */ |
6e70227d | 19476 | lh->total_length = |
c764a876 DE |
19477 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
19478 | &bytes_read, &offset_size); | |
debd256d | 19479 | line_ptr += bytes_read; |
7ba99d21 AT |
19480 | |
19481 | const gdb_byte *start_here = line_ptr; | |
19482 | ||
3019eac3 | 19483 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 19484 | { |
4d3c2250 | 19485 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19486 | return 0; |
19487 | } | |
7ba99d21 | 19488 | lh->statement_program_end = start_here + lh->total_length; |
debd256d JB |
19489 | lh->version = read_2_bytes (abfd, line_ptr); |
19490 | line_ptr += 2; | |
43988095 | 19491 | if (lh->version > 5) |
cd366ee8 DE |
19492 | { |
19493 | /* This is a version we don't understand. The format could have | |
19494 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 19495 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
19496 | return NULL; |
19497 | } | |
43988095 JK |
19498 | if (lh->version >= 5) |
19499 | { | |
19500 | gdb_byte segment_selector_size; | |
19501 | ||
19502 | /* Skip address size. */ | |
19503 | read_1_byte (abfd, line_ptr); | |
19504 | line_ptr += 1; | |
19505 | ||
19506 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
19507 | line_ptr += 1; | |
19508 | if (segment_selector_size != 0) | |
19509 | { | |
b98664d3 | 19510 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
19511 | "in .debug_line section"), |
19512 | segment_selector_size); | |
19513 | return NULL; | |
19514 | } | |
19515 | } | |
24aa364d | 19516 | lh->header_length = read_offset (abfd, line_ptr, offset_size); |
c764a876 | 19517 | line_ptr += offset_size; |
7ba99d21 | 19518 | lh->statement_program_start = line_ptr + lh->header_length; |
debd256d JB |
19519 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
19520 | line_ptr += 1; | |
2dc7f7b3 TT |
19521 | if (lh->version >= 4) |
19522 | { | |
19523 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
19524 | line_ptr += 1; | |
19525 | } | |
19526 | else | |
19527 | lh->maximum_ops_per_instruction = 1; | |
19528 | ||
19529 | if (lh->maximum_ops_per_instruction == 0) | |
19530 | { | |
19531 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 19532 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 19533 | "in `.debug_line' section")); |
2dc7f7b3 TT |
19534 | } |
19535 | ||
debd256d JB |
19536 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
19537 | line_ptr += 1; | |
19538 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
19539 | line_ptr += 1; | |
19540 | lh->line_range = read_1_byte (abfd, line_ptr); | |
19541 | line_ptr += 1; | |
19542 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
19543 | line_ptr += 1; | |
fff8551c | 19544 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
19545 | |
19546 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
19547 | for (i = 1; i < lh->opcode_base; ++i) | |
19548 | { | |
19549 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
19550 | line_ptr += 1; | |
19551 | } | |
19552 | ||
43988095 | 19553 | if (lh->version >= 5) |
debd256d | 19554 | { |
43988095 | 19555 | /* Read directory table. */ |
ed2dc618 SM |
19556 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19557 | &cu->header, | |
b926417a | 19558 | [] (struct line_header *header, const char *name, |
ecfb656c | 19559 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19560 | unsigned int length) |
19561 | { | |
b926417a | 19562 | header->add_include_dir (name); |
fff8551c | 19563 | }); |
debd256d | 19564 | |
43988095 | 19565 | /* Read file name table. */ |
ed2dc618 SM |
19566 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19567 | &cu->header, | |
b926417a | 19568 | [] (struct line_header *header, const char *name, |
ecfb656c | 19569 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19570 | unsigned int length) |
19571 | { | |
b926417a | 19572 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 19573 | }); |
43988095 JK |
19574 | } |
19575 | else | |
debd256d | 19576 | { |
43988095 JK |
19577 | /* Read directory table. */ |
19578 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19579 | { | |
19580 | line_ptr += bytes_read; | |
fff8551c | 19581 | lh->add_include_dir (cur_dir); |
43988095 | 19582 | } |
debd256d JB |
19583 | line_ptr += bytes_read; |
19584 | ||
43988095 JK |
19585 | /* Read file name table. */ |
19586 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19587 | { | |
ecfb656c PA |
19588 | unsigned int mod_time, length; |
19589 | dir_index d_index; | |
43988095 JK |
19590 | |
19591 | line_ptr += bytes_read; | |
ecfb656c | 19592 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
19593 | line_ptr += bytes_read; |
19594 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19595 | line_ptr += bytes_read; | |
19596 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19597 | line_ptr += bytes_read; | |
19598 | ||
ecfb656c | 19599 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
19600 | } |
19601 | line_ptr += bytes_read; | |
debd256d | 19602 | } |
debd256d | 19603 | |
3019eac3 | 19604 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 19605 | complaint (_("line number info header doesn't " |
3e43a32a | 19606 | "fit in `.debug_line' section")); |
debd256d | 19607 | |
debd256d JB |
19608 | return lh; |
19609 | } | |
c906108c | 19610 | |
c6da4cef | 19611 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 19612 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 19613 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
19614 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
19615 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 19616 | |
d521ce57 | 19617 | static const char * |
7ba99d21 | 19618 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 19619 | const dwarf2_psymtab *pst, |
c89b44cd TT |
19620 | const char *comp_dir, |
19621 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 19622 | { |
d521ce57 TT |
19623 | const char *include_name = fe.name; |
19624 | const char *include_name_to_compare = include_name; | |
72b9f47f | 19625 | const char *pst_filename; |
c6da4cef DE |
19626 | int file_is_pst; |
19627 | ||
8c43009f | 19628 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 19629 | |
c89b44cd | 19630 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
19631 | if (!IS_ABSOLUTE_PATH (include_name) |
19632 | && (dir_name != NULL || comp_dir != NULL)) | |
19633 | { | |
19634 | /* Avoid creating a duplicate psymtab for PST. | |
19635 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19636 | Before we do the comparison, however, we need to account | |
19637 | for DIR_NAME and COMP_DIR. | |
19638 | First prepend dir_name (if non-NULL). If we still don't | |
19639 | have an absolute path prepend comp_dir (if non-NULL). | |
19640 | However, the directory we record in the include-file's | |
19641 | psymtab does not contain COMP_DIR (to match the | |
19642 | corresponding symtab(s)). | |
19643 | ||
19644 | Example: | |
19645 | ||
19646 | bash$ cd /tmp | |
19647 | bash$ gcc -g ./hello.c | |
19648 | include_name = "hello.c" | |
19649 | dir_name = "." | |
19650 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19651 | DW_AT_name = "./hello.c" |
19652 | ||
19653 | */ | |
c6da4cef DE |
19654 | |
19655 | if (dir_name != NULL) | |
19656 | { | |
c89b44cd TT |
19657 | name_holder->reset (concat (dir_name, SLASH_STRING, |
19658 | include_name, (char *) NULL)); | |
19659 | include_name = name_holder->get (); | |
c6da4cef | 19660 | include_name_to_compare = include_name; |
c6da4cef DE |
19661 | } |
19662 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19663 | { | |
c89b44cd TT |
19664 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
19665 | include_name, (char *) NULL)); | |
19666 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
19667 | } |
19668 | } | |
19669 | ||
19670 | pst_filename = pst->filename; | |
c89b44cd | 19671 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
19672 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
19673 | { | |
c89b44cd TT |
19674 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
19675 | pst_filename, (char *) NULL)); | |
19676 | pst_filename = copied_name.get (); | |
c6da4cef DE |
19677 | } |
19678 | ||
1e3fad37 | 19679 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19680 | |
c6da4cef DE |
19681 | if (file_is_pst) |
19682 | return NULL; | |
19683 | return include_name; | |
19684 | } | |
19685 | ||
d9b3de22 DE |
19686 | /* State machine to track the state of the line number program. */ |
19687 | ||
6f77053d | 19688 | class lnp_state_machine |
d9b3de22 | 19689 | { |
6f77053d PA |
19690 | public: |
19691 | /* Initialize a machine state for the start of a line number | |
19692 | program. */ | |
804d2729 TT |
19693 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
19694 | bool record_lines_p); | |
6f77053d | 19695 | |
8c43009f PA |
19696 | file_entry *current_file () |
19697 | { | |
19698 | /* lh->file_names is 0-based, but the file name numbers in the | |
19699 | statement program are 1-based. */ | |
6f77053d PA |
19700 | return m_line_header->file_name_at (m_file); |
19701 | } | |
19702 | ||
19703 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19704 | we're processing the end of a sequence. */ | |
19705 | void record_line (bool end_sequence); | |
19706 | ||
7ab6656f OJ |
19707 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
19708 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
19709 | void check_line_address (struct dwarf2_cu *cu, |
19710 | const gdb_byte *line_ptr, | |
7ab6656f | 19711 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
19712 | |
19713 | void handle_set_discriminator (unsigned int discriminator) | |
19714 | { | |
19715 | m_discriminator = discriminator; | |
19716 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19717 | } | |
19718 | ||
19719 | /* Handle DW_LNE_set_address. */ | |
19720 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19721 | { | |
19722 | m_op_index = 0; | |
19723 | address += baseaddr; | |
19724 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19725 | } | |
19726 | ||
19727 | /* Handle DW_LNS_advance_pc. */ | |
19728 | void handle_advance_pc (CORE_ADDR adjust); | |
19729 | ||
19730 | /* Handle a special opcode. */ | |
19731 | void handle_special_opcode (unsigned char op_code); | |
19732 | ||
19733 | /* Handle DW_LNS_advance_line. */ | |
19734 | void handle_advance_line (int line_delta) | |
19735 | { | |
19736 | advance_line (line_delta); | |
19737 | } | |
19738 | ||
19739 | /* Handle DW_LNS_set_file. */ | |
19740 | void handle_set_file (file_name_index file); | |
19741 | ||
19742 | /* Handle DW_LNS_negate_stmt. */ | |
19743 | void handle_negate_stmt () | |
19744 | { | |
19745 | m_is_stmt = !m_is_stmt; | |
19746 | } | |
19747 | ||
19748 | /* Handle DW_LNS_const_add_pc. */ | |
19749 | void handle_const_add_pc (); | |
19750 | ||
19751 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19752 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19753 | { | |
19754 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19755 | m_op_index = 0; | |
19756 | } | |
19757 | ||
19758 | /* Handle DW_LNS_copy. */ | |
19759 | void handle_copy () | |
19760 | { | |
19761 | record_line (false); | |
19762 | m_discriminator = 0; | |
19763 | } | |
19764 | ||
19765 | /* Handle DW_LNE_end_sequence. */ | |
19766 | void handle_end_sequence () | |
19767 | { | |
804d2729 | 19768 | m_currently_recording_lines = true; |
6f77053d PA |
19769 | } |
19770 | ||
19771 | private: | |
19772 | /* Advance the line by LINE_DELTA. */ | |
19773 | void advance_line (int line_delta) | |
19774 | { | |
19775 | m_line += line_delta; | |
19776 | ||
19777 | if (line_delta != 0) | |
19778 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19779 | } |
19780 | ||
804d2729 TT |
19781 | struct dwarf2_cu *m_cu; |
19782 | ||
6f77053d PA |
19783 | gdbarch *m_gdbarch; |
19784 | ||
19785 | /* True if we're recording lines. | |
19786 | Otherwise we're building partial symtabs and are just interested in | |
19787 | finding include files mentioned by the line number program. */ | |
19788 | bool m_record_lines_p; | |
19789 | ||
8c43009f | 19790 | /* The line number header. */ |
6f77053d | 19791 | line_header *m_line_header; |
8c43009f | 19792 | |
6f77053d PA |
19793 | /* These are part of the standard DWARF line number state machine, |
19794 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19795 | |
6f77053d | 19796 | unsigned char m_op_index = 0; |
7ba99d21 AT |
19797 | /* The line table index of the current file. */ |
19798 | file_name_index m_file = 1; | |
6f77053d PA |
19799 | unsigned int m_line = 1; |
19800 | ||
19801 | /* These are initialized in the constructor. */ | |
19802 | ||
19803 | CORE_ADDR m_address; | |
19804 | bool m_is_stmt; | |
19805 | unsigned int m_discriminator; | |
d9b3de22 DE |
19806 | |
19807 | /* Additional bits of state we need to track. */ | |
19808 | ||
19809 | /* The last file that we called dwarf2_start_subfile for. | |
19810 | This is only used for TLLs. */ | |
6f77053d | 19811 | unsigned int m_last_file = 0; |
d9b3de22 | 19812 | /* The last file a line number was recorded for. */ |
6f77053d | 19813 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 19814 | |
804d2729 TT |
19815 | /* When true, record the lines we decode. */ |
19816 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
19817 | |
19818 | /* The last line number that was recorded, used to coalesce | |
19819 | consecutive entries for the same line. This can happen, for | |
19820 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19821 | unsigned int m_last_line = 0; |
19822 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19823 | }; |
d9b3de22 | 19824 | |
6f77053d PA |
19825 | void |
19826 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19827 | { | |
19828 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19829 | / m_line_header->maximum_ops_per_instruction) | |
19830 | * m_line_header->minimum_instruction_length); | |
19831 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19832 | m_op_index = ((m_op_index + adjust) | |
19833 | % m_line_header->maximum_ops_per_instruction); | |
19834 | } | |
d9b3de22 | 19835 | |
6f77053d PA |
19836 | void |
19837 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19838 | { |
6f77053d | 19839 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
19840 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
19841 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
19842 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
19843 | / m_line_header->maximum_ops_per_instruction) |
19844 | * m_line_header->minimum_instruction_length); | |
19845 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 19846 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 19847 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 19848 | |
258bf0ee | 19849 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
19850 | advance_line (line_delta); |
19851 | record_line (false); | |
19852 | m_discriminator = 0; | |
19853 | } | |
d9b3de22 | 19854 | |
6f77053d PA |
19855 | void |
19856 | lnp_state_machine::handle_set_file (file_name_index file) | |
19857 | { | |
19858 | m_file = file; | |
19859 | ||
19860 | const file_entry *fe = current_file (); | |
19861 | if (fe == NULL) | |
19862 | dwarf2_debug_line_missing_file_complaint (); | |
19863 | else if (m_record_lines_p) | |
19864 | { | |
19865 | const char *dir = fe->include_dir (m_line_header); | |
19866 | ||
c24bdb02 | 19867 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 19868 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 19869 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
19870 | } |
19871 | } | |
19872 | ||
19873 | void | |
19874 | lnp_state_machine::handle_const_add_pc () | |
19875 | { | |
19876 | CORE_ADDR adjust | |
19877 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19878 | ||
19879 | CORE_ADDR addr_adj | |
19880 | = (((m_op_index + adjust) | |
19881 | / m_line_header->maximum_ops_per_instruction) | |
19882 | * m_line_header->minimum_instruction_length); | |
19883 | ||
19884 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19885 | m_op_index = ((m_op_index + adjust) | |
19886 | % m_line_header->maximum_ops_per_instruction); | |
19887 | } | |
d9b3de22 | 19888 | |
a05a36a5 DE |
19889 | /* Return non-zero if we should add LINE to the line number table. |
19890 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19891 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19892 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19893 | had a non-zero discriminator. | |
19894 | ||
19895 | We have to be careful in the presence of discriminators. | |
19896 | E.g., for this line: | |
19897 | ||
19898 | for (i = 0; i < 100000; i++); | |
19899 | ||
19900 | clang can emit four line number entries for that one line, | |
19901 | each with a different discriminator. | |
19902 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19903 | ||
19904 | However, we want gdb to coalesce all four entries into one. | |
19905 | Otherwise the user could stepi into the middle of the line and | |
19906 | gdb would get confused about whether the pc really was in the | |
19907 | middle of the line. | |
19908 | ||
19909 | Things are further complicated by the fact that two consecutive | |
19910 | line number entries for the same line is a heuristic used by gcc | |
19911 | to denote the end of the prologue. So we can't just discard duplicate | |
19912 | entries, we have to be selective about it. The heuristic we use is | |
19913 | that we only collapse consecutive entries for the same line if at least | |
19914 | one of those entries has a non-zero discriminator. PR 17276. | |
19915 | ||
19916 | Note: Addresses in the line number state machine can never go backwards | |
19917 | within one sequence, thus this coalescing is ok. */ | |
19918 | ||
19919 | static int | |
804d2729 TT |
19920 | dwarf_record_line_p (struct dwarf2_cu *cu, |
19921 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
19922 | int line_has_non_zero_discriminator, |
19923 | struct subfile *last_subfile) | |
19924 | { | |
c24bdb02 | 19925 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
19926 | return 1; |
19927 | if (line != last_line) | |
19928 | return 1; | |
19929 | /* Same line for the same file that we've seen already. | |
19930 | As a last check, for pr 17276, only record the line if the line | |
19931 | has never had a non-zero discriminator. */ | |
19932 | if (!line_has_non_zero_discriminator) | |
19933 | return 1; | |
19934 | return 0; | |
19935 | } | |
19936 | ||
804d2729 TT |
19937 | /* Use the CU's builder to record line number LINE beginning at |
19938 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
19939 | |
19940 | static void | |
d9b3de22 | 19941 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
8c95582d | 19942 | unsigned int line, CORE_ADDR address, bool is_stmt, |
804d2729 | 19943 | struct dwarf2_cu *cu) |
252a6764 DE |
19944 | { |
19945 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19946 | ||
27e0867f DE |
19947 | if (dwarf_line_debug) |
19948 | { | |
19949 | fprintf_unfiltered (gdb_stdlog, | |
19950 | "Recording line %u, file %s, address %s\n", | |
19951 | line, lbasename (subfile->name), | |
19952 | paddress (gdbarch, address)); | |
19953 | } | |
19954 | ||
804d2729 | 19955 | if (cu != nullptr) |
8c95582d | 19956 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
252a6764 DE |
19957 | } |
19958 | ||
19959 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19960 | Mark the end of a set of line number records. | |
d9b3de22 | 19961 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19962 | If SUBFILE is NULL the request is ignored. */ |
19963 | ||
19964 | static void | |
19965 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 19966 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 19967 | { |
27e0867f DE |
19968 | if (subfile == NULL) |
19969 | return; | |
19970 | ||
19971 | if (dwarf_line_debug) | |
19972 | { | |
19973 | fprintf_unfiltered (gdb_stdlog, | |
19974 | "Finishing current line, file %s, address %s\n", | |
19975 | lbasename (subfile->name), | |
19976 | paddress (gdbarch, address)); | |
19977 | } | |
19978 | ||
8c95582d | 19979 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
d9b3de22 DE |
19980 | } |
19981 | ||
6f77053d PA |
19982 | void |
19983 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19984 | { |
d9b3de22 DE |
19985 | if (dwarf_line_debug) |
19986 | { | |
19987 | fprintf_unfiltered (gdb_stdlog, | |
19988 | "Processing actual line %u: file %u," | |
94a72be7 | 19989 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 19990 | m_line, m_file, |
6f77053d | 19991 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
19992 | m_is_stmt, m_discriminator, |
19993 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
19994 | } |
19995 | ||
6f77053d | 19996 | file_entry *fe = current_file (); |
8c43009f PA |
19997 | |
19998 | if (fe == NULL) | |
d9b3de22 DE |
19999 | dwarf2_debug_line_missing_file_complaint (); |
20000 | /* For now we ignore lines not starting on an instruction boundary. | |
20001 | But not when processing end_sequence for compatibility with the | |
20002 | previous version of the code. */ | |
6f77053d | 20003 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20004 | { |
8c43009f | 20005 | fe->included_p = 1; |
8c95582d | 20006 | if (m_record_lines_p) |
d9b3de22 | 20007 | { |
c24bdb02 | 20008 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 20009 | || end_sequence) |
d9b3de22 | 20010 | { |
804d2729 TT |
20011 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
20012 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
20013 | } |
20014 | ||
20015 | if (!end_sequence) | |
20016 | { | |
8c95582d AB |
20017 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
20018 | ||
804d2729 | 20019 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
20020 | m_line_has_non_zero_discriminator, |
20021 | m_last_subfile)) | |
d9b3de22 | 20022 | { |
c24bdb02 | 20023 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 20024 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 20025 | builder->get_current_subfile (), |
8c95582d | 20026 | m_line, m_address, is_stmt, |
804d2729 | 20027 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 20028 | } |
c24bdb02 | 20029 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20030 | m_last_line = m_line; |
d9b3de22 DE |
20031 | } |
20032 | } | |
20033 | } | |
20034 | } | |
20035 | ||
804d2729 TT |
20036 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
20037 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 20038 | { |
804d2729 | 20039 | m_cu = cu; |
6f77053d PA |
20040 | m_gdbarch = arch; |
20041 | m_record_lines_p = record_lines_p; | |
20042 | m_line_header = lh; | |
d9b3de22 | 20043 | |
804d2729 | 20044 | m_currently_recording_lines = true; |
d9b3de22 | 20045 | |
d9b3de22 DE |
20046 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
20047 | was a line entry for it so that the backend has a chance to adjust it | |
20048 | and also record it in case it needs it. This is currently used by MIPS | |
20049 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
20050 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
20051 | m_is_stmt = lh->default_is_stmt; | |
20052 | m_discriminator = 0; | |
252a6764 DE |
20053 | } |
20054 | ||
6f77053d PA |
20055 | void |
20056 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
20057 | const gdb_byte *line_ptr, | |
7ab6656f | 20058 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 20059 | { |
7ab6656f OJ |
20060 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
20061 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
20062 | values of zero to preserve GDB's previous behaviour which is to handle | |
20063 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 20064 | |
7ab6656f | 20065 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
20066 | { |
20067 | /* This line table is for a function which has been | |
20068 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20069 | ||
518817b3 | 20070 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
20071 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
20072 | ||
b98664d3 | 20073 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 20074 | line_offset, objfile_name (objfile)); |
804d2729 TT |
20075 | m_currently_recording_lines = false; |
20076 | /* Note: m_currently_recording_lines is left as false until we see | |
20077 | DW_LNE_end_sequence. */ | |
924c2928 DE |
20078 | } |
20079 | } | |
20080 | ||
f3f5162e | 20081 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20082 | Process the line number information in LH. |
20083 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20084 | program in order to set included_p for every referenced header. */ | |
debd256d | 20085 | |
c906108c | 20086 | static void |
43f3e411 DE |
20087 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20088 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20089 | { |
d521ce57 TT |
20090 | const gdb_byte *line_ptr, *extended_end; |
20091 | const gdb_byte *line_end; | |
a8c50c1f | 20092 | unsigned int bytes_read, extended_len; |
699ca60a | 20093 | unsigned char op_code, extended_op; |
e142c38c | 20094 | CORE_ADDR baseaddr; |
518817b3 | 20095 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20096 | bfd *abfd = objfile->obfd; |
fbf65064 | 20097 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
20098 | /* True if we're recording line info (as opposed to building partial |
20099 | symtabs and just interested in finding include files mentioned by | |
20100 | the line number program). */ | |
20101 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 20102 | |
b3b3bada | 20103 | baseaddr = objfile->text_section_offset (); |
c906108c | 20104 | |
debd256d JB |
20105 | line_ptr = lh->statement_program_start; |
20106 | line_end = lh->statement_program_end; | |
c906108c SS |
20107 | |
20108 | /* Read the statement sequences until there's nothing left. */ | |
20109 | while (line_ptr < line_end) | |
20110 | { | |
6f77053d PA |
20111 | /* The DWARF line number program state machine. Reset the state |
20112 | machine at the start of each sequence. */ | |
804d2729 | 20113 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 20114 | bool end_sequence = false; |
d9b3de22 | 20115 | |
8c43009f | 20116 | if (record_lines_p) |
c906108c | 20117 | { |
8c43009f PA |
20118 | /* Start a subfile for the current file of the state |
20119 | machine. */ | |
20120 | const file_entry *fe = state_machine.current_file (); | |
20121 | ||
20122 | if (fe != NULL) | |
804d2729 | 20123 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
20124 | } |
20125 | ||
a738430d | 20126 | /* Decode the table. */ |
d9b3de22 | 20127 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20128 | { |
20129 | op_code = read_1_byte (abfd, line_ptr); | |
20130 | line_ptr += 1; | |
9aa1fe7e | 20131 | |
debd256d | 20132 | if (op_code >= lh->opcode_base) |
6e70227d | 20133 | { |
8e07a239 | 20134 | /* Special opcode. */ |
6f77053d | 20135 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20136 | } |
20137 | else switch (op_code) | |
c906108c SS |
20138 | { |
20139 | case DW_LNS_extended_op: | |
3e43a32a MS |
20140 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20141 | &bytes_read); | |
473b7be6 | 20142 | line_ptr += bytes_read; |
a8c50c1f | 20143 | extended_end = line_ptr + extended_len; |
c906108c SS |
20144 | extended_op = read_1_byte (abfd, line_ptr); |
20145 | line_ptr += 1; | |
20146 | switch (extended_op) | |
20147 | { | |
20148 | case DW_LNE_end_sequence: | |
6f77053d PA |
20149 | state_machine.handle_end_sequence (); |
20150 | end_sequence = true; | |
c906108c SS |
20151 | break; |
20152 | case DW_LNE_set_address: | |
d9b3de22 DE |
20153 | { |
20154 | CORE_ADDR address | |
c8a7a66f | 20155 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 20156 | line_ptr += bytes_read; |
6f77053d PA |
20157 | |
20158 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 20159 | lowpc - baseaddr, address); |
6f77053d | 20160 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 20161 | } |
c906108c SS |
20162 | break; |
20163 | case DW_LNE_define_file: | |
debd256d | 20164 | { |
d521ce57 | 20165 | const char *cur_file; |
ecfb656c PA |
20166 | unsigned int mod_time, length; |
20167 | dir_index dindex; | |
6e70227d | 20168 | |
3e43a32a MS |
20169 | cur_file = read_direct_string (abfd, line_ptr, |
20170 | &bytes_read); | |
debd256d | 20171 | line_ptr += bytes_read; |
ecfb656c | 20172 | dindex = (dir_index) |
debd256d JB |
20173 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20174 | line_ptr += bytes_read; | |
20175 | mod_time = | |
20176 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20177 | line_ptr += bytes_read; | |
20178 | length = | |
20179 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20180 | line_ptr += bytes_read; | |
ecfb656c | 20181 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20182 | } |
c906108c | 20183 | break; |
d0c6ba3d | 20184 | case DW_LNE_set_discriminator: |
6f77053d PA |
20185 | { |
20186 | /* The discriminator is not interesting to the | |
20187 | debugger; just ignore it. We still need to | |
20188 | check its value though: | |
20189 | if there are consecutive entries for the same | |
20190 | (non-prologue) line we want to coalesce them. | |
20191 | PR 17276. */ | |
20192 | unsigned int discr | |
20193 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20194 | line_ptr += bytes_read; | |
20195 | ||
20196 | state_machine.handle_set_discriminator (discr); | |
20197 | } | |
d0c6ba3d | 20198 | break; |
c906108c | 20199 | default: |
b98664d3 | 20200 | complaint (_("mangled .debug_line section")); |
debd256d | 20201 | return; |
c906108c | 20202 | } |
a8c50c1f DJ |
20203 | /* Make sure that we parsed the extended op correctly. If e.g. |
20204 | we expected a different address size than the producer used, | |
20205 | we may have read the wrong number of bytes. */ | |
20206 | if (line_ptr != extended_end) | |
20207 | { | |
b98664d3 | 20208 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
20209 | return; |
20210 | } | |
c906108c SS |
20211 | break; |
20212 | case DW_LNS_copy: | |
6f77053d | 20213 | state_machine.handle_copy (); |
c906108c SS |
20214 | break; |
20215 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20216 | { |
20217 | CORE_ADDR adjust | |
20218 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20219 | line_ptr += bytes_read; |
6f77053d PA |
20220 | |
20221 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20222 | } |
c906108c SS |
20223 | break; |
20224 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20225 | { |
20226 | int line_delta | |
20227 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20228 | line_ptr += bytes_read; |
6f77053d PA |
20229 | |
20230 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20231 | } |
c906108c SS |
20232 | break; |
20233 | case DW_LNS_set_file: | |
d9b3de22 | 20234 | { |
6f77053d | 20235 | file_name_index file |
ecfb656c PA |
20236 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20237 | &bytes_read); | |
d9b3de22 | 20238 | line_ptr += bytes_read; |
8c43009f | 20239 | |
6f77053d | 20240 | state_machine.handle_set_file (file); |
d9b3de22 | 20241 | } |
c906108c SS |
20242 | break; |
20243 | case DW_LNS_set_column: | |
0ad93d4f | 20244 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20245 | line_ptr += bytes_read; |
20246 | break; | |
20247 | case DW_LNS_negate_stmt: | |
6f77053d | 20248 | state_machine.handle_negate_stmt (); |
c906108c SS |
20249 | break; |
20250 | case DW_LNS_set_basic_block: | |
c906108c | 20251 | break; |
c2c6d25f JM |
20252 | /* Add to the address register of the state machine the |
20253 | address increment value corresponding to special opcode | |
a738430d MK |
20254 | 255. I.e., this value is scaled by the minimum |
20255 | instruction length since special opcode 255 would have | |
b021a221 | 20256 | scaled the increment. */ |
c906108c | 20257 | case DW_LNS_const_add_pc: |
6f77053d | 20258 | state_machine.handle_const_add_pc (); |
c906108c SS |
20259 | break; |
20260 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20261 | { |
6f77053d | 20262 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20263 | line_ptr += 2; |
6f77053d PA |
20264 | |
20265 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20266 | } |
c906108c | 20267 | break; |
9aa1fe7e | 20268 | default: |
a738430d MK |
20269 | { |
20270 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20271 | int i; |
a738430d | 20272 | |
debd256d | 20273 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20274 | { |
20275 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20276 | line_ptr += bytes_read; | |
20277 | } | |
20278 | } | |
c906108c SS |
20279 | } |
20280 | } | |
d9b3de22 DE |
20281 | |
20282 | if (!end_sequence) | |
20283 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20284 | ||
20285 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20286 | in which case we still finish recording the last line). */ | |
6f77053d | 20287 | state_machine.record_line (true); |
c906108c | 20288 | } |
f3f5162e DE |
20289 | } |
20290 | ||
20291 | /* Decode the Line Number Program (LNP) for the given line_header | |
20292 | structure and CU. The actual information extracted and the type | |
20293 | of structures created from the LNP depends on the value of PST. | |
20294 | ||
20295 | 1. If PST is NULL, then this procedure uses the data from the program | |
20296 | to create all necessary symbol tables, and their linetables. | |
20297 | ||
20298 | 2. If PST is not NULL, this procedure reads the program to determine | |
20299 | the list of files included by the unit represented by PST, and | |
20300 | builds all the associated partial symbol tables. | |
20301 | ||
20302 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20303 | It is used for relative paths in the line table. | |
20304 | NOTE: When processing partial symtabs (pst != NULL), | |
20305 | comp_dir == pst->dirname. | |
20306 | ||
20307 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20308 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20309 | symtab we don't use it in the name of the psymtabs we create. | |
20310 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20311 | A good testcase for this is mb-inline.exp. |
20312 | ||
527f3840 JK |
20313 | LOWPC is the lowest address in CU (or 0 if not known). |
20314 | ||
20315 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20316 | for its PC<->lines mapping information. Otherwise only the filename | |
20317 | table is read in. */ | |
f3f5162e DE |
20318 | |
20319 | static void | |
20320 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 20321 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 20322 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 20323 | { |
518817b3 | 20324 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20325 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 20326 | |
527f3840 JK |
20327 | if (decode_mapping) |
20328 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20329 | |
20330 | if (decode_for_pst_p) | |
20331 | { | |
aaa75496 JB |
20332 | /* Now that we're done scanning the Line Header Program, we can |
20333 | create the psymtab of each included file. */ | |
7ba99d21 AT |
20334 | for (auto &file_entry : lh->file_names ()) |
20335 | if (file_entry.included_p == 1) | |
aaa75496 | 20336 | { |
c89b44cd | 20337 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 20338 | const char *include_name = |
7ba99d21 AT |
20339 | psymtab_include_file_name (lh, file_entry, pst, |
20340 | comp_dir, &name_holder); | |
c6da4cef | 20341 | if (include_name != NULL) |
aaa75496 JB |
20342 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20343 | } | |
20344 | } | |
cb1df416 DJ |
20345 | else |
20346 | { | |
20347 | /* Make sure a symtab is created for every file, even files | |
20348 | which contain only variables (i.e. no code with associated | |
20349 | line numbers). */ | |
c24bdb02 KS |
20350 | buildsym_compunit *builder = cu->get_builder (); |
20351 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 20352 | |
7ba99d21 | 20353 | for (auto &fe : lh->file_names ()) |
cb1df416 | 20354 | { |
804d2729 | 20355 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 20356 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 20357 | { |
c24bdb02 | 20358 | builder->get_current_subfile ()->symtab |
804d2729 | 20359 | = allocate_symtab (cust, |
c24bdb02 | 20360 | builder->get_current_subfile ()->name); |
43f3e411 | 20361 | } |
c24bdb02 | 20362 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
20363 | } |
20364 | } | |
c906108c SS |
20365 | } |
20366 | ||
20367 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
20368 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 20369 | or NULL if not known. |
c906108c SS |
20370 | This routine tries to keep line numbers from identical absolute and |
20371 | relative file names in a common subfile. | |
20372 | ||
20373 | Using the `list' example from the GDB testsuite, which resides in | |
20374 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
20375 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
20376 | ||
c5aa993b | 20377 | DW_AT_name: /srcdir/list0.c |
4d663531 | 20378 | DW_AT_comp_dir: /compdir |
357e46e7 | 20379 | files.files[0].name: list0.h |
c5aa993b | 20380 | files.files[0].dir: /srcdir |
357e46e7 | 20381 | files.files[1].name: list0.c |
c5aa993b | 20382 | files.files[1].dir: /srcdir |
c906108c SS |
20383 | |
20384 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
20385 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
20386 | start_subfile will ensure that this happens provided that we pass the | |
20387 | concatenation of files.files[1].dir and files.files[1].name as the | |
20388 | subfile's name. */ | |
c906108c SS |
20389 | |
20390 | static void | |
804d2729 TT |
20391 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
20392 | const char *dirname) | |
c906108c | 20393 | { |
43816ebc | 20394 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 20395 | |
4d663531 | 20396 | /* In order not to lose the line information directory, |
4f1520fb FR |
20397 | we concatenate it to the filename when it makes sense. |
20398 | Note that the Dwarf3 standard says (speaking of filenames in line | |
20399 | information): ``The directory index is ignored for file names | |
20400 | that represent full path names''. Thus ignoring dirname in the | |
20401 | `else' branch below isn't an issue. */ | |
c906108c | 20402 | |
d5166ae1 | 20403 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 20404 | { |
43816ebc TT |
20405 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
20406 | filename = copy.get (); | |
d521ce57 | 20407 | } |
c906108c | 20408 | |
c24bdb02 | 20409 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
20410 | } |
20411 | ||
804d2729 TT |
20412 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
20413 | buildsym_compunit constructor. */ | |
f4dc4d17 | 20414 | |
c24bdb02 KS |
20415 | struct compunit_symtab * |
20416 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
20417 | CORE_ADDR low_pc) | |
f4dc4d17 | 20418 | { |
c24bdb02 | 20419 | gdb_assert (m_builder == nullptr); |
43f3e411 | 20420 | |
c24bdb02 KS |
20421 | m_builder.reset (new struct buildsym_compunit |
20422 | (per_cu->dwarf2_per_objfile->objfile, | |
20423 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 20424 | |
c24bdb02 | 20425 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 20426 | |
c24bdb02 KS |
20427 | get_builder ()->record_debugformat ("DWARF 2"); |
20428 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 20429 | |
c24bdb02 | 20430 | processing_has_namespace_info = false; |
43f3e411 | 20431 | |
c24bdb02 | 20432 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
20433 | } |
20434 | ||
4c2df51b DJ |
20435 | static void |
20436 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 20437 | struct dwarf2_cu *cu) |
4c2df51b | 20438 | { |
518817b3 | 20439 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
20440 | struct comp_unit_head *cu_header = &cu->header; |
20441 | ||
4c2df51b DJ |
20442 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
20443 | code here to turn a symbol with DW_AT_external and a | |
20444 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
20445 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
20446 | with some versions of binutils) where shared libraries could have | |
20447 | relocations against symbols in their debug information - the | |
20448 | minimal symbol would have the right address, but the debug info | |
20449 | would not. It's no longer necessary, because we will explicitly | |
20450 | apply relocations when we read in the debug information now. */ | |
20451 | ||
20452 | /* A DW_AT_location attribute with no contents indicates that a | |
20453 | variable has been optimized away. */ | |
4fc6c0d5 | 20454 | if (attr->form_is_block () && DW_BLOCK (attr)->size == 0) |
4c2df51b | 20455 | { |
f1e6e072 | 20456 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
20457 | return; |
20458 | } | |
20459 | ||
20460 | /* Handle one degenerate form of location expression specially, to | |
20461 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
20462 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
20463 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 20464 | |
4fc6c0d5 | 20465 | if (attr->form_is_block () |
3019eac3 DE |
20466 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
20467 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
20468 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
20469 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
20470 | && (DW_BLOCK (attr)->size |
20471 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 20472 | { |
891d2f0b | 20473 | unsigned int dummy; |
4c2df51b | 20474 | |
3019eac3 | 20475 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
c8a7a66f TT |
20476 | SET_SYMBOL_VALUE_ADDRESS |
20477 | (sym, cu->header.read_address (objfile->obfd, | |
20478 | DW_BLOCK (attr)->data + 1, | |
20479 | &dummy)); | |
3019eac3 | 20480 | else |
38583298 TT |
20481 | SET_SYMBOL_VALUE_ADDRESS |
20482 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
20483 | &dummy)); | |
f1e6e072 | 20484 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 20485 | fixup_symbol_section (sym, objfile); |
6a053cb1 TT |
20486 | SET_SYMBOL_VALUE_ADDRESS |
20487 | (sym, | |
20488 | SYMBOL_VALUE_ADDRESS (sym) | |
20489 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); | |
4c2df51b DJ |
20490 | return; |
20491 | } | |
20492 | ||
20493 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
20494 | expression evaluator, and use LOC_COMPUTED only when necessary | |
20495 | (i.e. when the value of a register or memory location is | |
20496 | referenced, or a thread-local block, etc.). Then again, it might | |
20497 | not be worthwhile. I'm assuming that it isn't unless performance | |
20498 | or memory numbers show me otherwise. */ | |
20499 | ||
f1e6e072 | 20500 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 20501 | |
f1e6e072 | 20502 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 20503 | cu->has_loclist = true; |
4c2df51b DJ |
20504 | } |
20505 | ||
c906108c SS |
20506 | /* Given a pointer to a DWARF information entry, figure out if we need |
20507 | to make a symbol table entry for it, and if so, create a new entry | |
20508 | and return a pointer to it. | |
20509 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
20510 | used the passed type. |
20511 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
20512 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
20513 | |
20514 | static struct symbol * | |
5e2db402 TT |
20515 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
20516 | struct symbol *space) | |
c906108c | 20517 | { |
518817b3 SM |
20518 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20519 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 20520 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 20521 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 20522 | struct symbol *sym = NULL; |
15d034d0 | 20523 | const char *name; |
c906108c SS |
20524 | struct attribute *attr = NULL; |
20525 | struct attribute *attr2 = NULL; | |
e142c38c | 20526 | CORE_ADDR baseaddr; |
e37fd15a SW |
20527 | struct pending **list_to_add = NULL; |
20528 | ||
edb3359d | 20529 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 20530 | |
b3b3bada | 20531 | baseaddr = objfile->text_section_offset (); |
c906108c | 20532 | |
94af9270 | 20533 | name = dwarf2_name (die, cu); |
c906108c SS |
20534 | if (name) |
20535 | { | |
94af9270 | 20536 | const char *linkagename; |
34eaf542 | 20537 | int suppress_add = 0; |
94af9270 | 20538 | |
34eaf542 TT |
20539 | if (space) |
20540 | sym = space; | |
20541 | else | |
e623cf5d | 20542 | sym = allocate_symbol (objfile); |
c906108c | 20543 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
20544 | |
20545 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 20546 | sym->set_language (cu->language, &objfile->objfile_obstack); |
94af9270 | 20547 | linkagename = dwarf2_physname (name, die, cu); |
4d4eaa30 | 20548 | sym->compute_and_set_names (linkagename, false, objfile->per_bfd); |
c906108c | 20549 | |
f55ee35c JK |
20550 | /* Fortran does not have mangling standard and the mangling does differ |
20551 | between gfortran, iFort etc. */ | |
20552 | if (cu->language == language_fortran | |
468c0cbb CB |
20553 | && symbol_get_demangled_name (sym) == NULL) |
20554 | symbol_set_demangled_name (sym, | |
cfc594ee | 20555 | dwarf2_full_name (name, die, cu), |
29df156d | 20556 | NULL); |
f55ee35c | 20557 | |
c906108c | 20558 | /* Default assumptions. |
c5aa993b | 20559 | Use the passed type or decode it from the die. */ |
176620f1 | 20560 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 20561 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
20562 | if (type != NULL) |
20563 | SYMBOL_TYPE (sym) = type; | |
20564 | else | |
e7c27a73 | 20565 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
20566 | attr = dwarf2_attr (die, |
20567 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
20568 | cu); | |
435d3d88 | 20569 | if (attr != nullptr) |
c906108c SS |
20570 | { |
20571 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
20572 | } | |
cb1df416 | 20573 | |
edb3359d DJ |
20574 | attr = dwarf2_attr (die, |
20575 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
20576 | cu); | |
435d3d88 | 20577 | if (attr != nullptr) |
cb1df416 | 20578 | { |
ecfb656c | 20579 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 20580 | struct file_entry *fe; |
9a619af0 | 20581 | |
ecfb656c PA |
20582 | if (cu->line_header != NULL) |
20583 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
20584 | else |
20585 | fe = NULL; | |
20586 | ||
20587 | if (fe == NULL) | |
b98664d3 | 20588 | complaint (_("file index out of range")); |
8c43009f PA |
20589 | else |
20590 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
20591 | } |
20592 | ||
c906108c SS |
20593 | switch (die->tag) |
20594 | { | |
20595 | case DW_TAG_label: | |
e142c38c | 20596 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 20597 | if (attr != nullptr) |
3e29f34a MR |
20598 | { |
20599 | CORE_ADDR addr; | |
20600 | ||
cd6c91b4 | 20601 | addr = attr->value_as_address (); |
3e29f34a | 20602 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 20603 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 20604 | } |
0f5238ed TT |
20605 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20606 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20607 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 20608 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20609 | break; |
20610 | case DW_TAG_subprogram: | |
20611 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20612 | finish_block. */ | |
f1e6e072 | 20613 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20614 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 20615 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
20616 | || cu->language == language_ada |
20617 | || cu->language == language_fortran) | |
c906108c | 20618 | { |
2cfa0c8d | 20619 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
20620 | Ada and Fortran subprograms, whether marked external or |
20621 | not, are always stored as a global symbol, because we want | |
20622 | to be able to access them globally. For instance, we want | |
20623 | to be able to break on a nested subprogram without having | |
20624 | to specify the context. */ | |
c24bdb02 | 20625 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
20626 | } |
20627 | else | |
20628 | { | |
e37fd15a | 20629 | list_to_add = cu->list_in_scope; |
c906108c SS |
20630 | } |
20631 | break; | |
edb3359d DJ |
20632 | case DW_TAG_inlined_subroutine: |
20633 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20634 | finish_block. */ | |
f1e6e072 | 20635 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20636 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20637 | list_to_add = cu->list_in_scope; |
edb3359d | 20638 | break; |
34eaf542 TT |
20639 | case DW_TAG_template_value_param: |
20640 | suppress_add = 1; | |
20641 | /* Fall through. */ | |
72929c62 | 20642 | case DW_TAG_constant: |
c906108c | 20643 | case DW_TAG_variable: |
254e6b9e | 20644 | case DW_TAG_member: |
0963b4bd MS |
20645 | /* Compilation with minimal debug info may result in |
20646 | variables with missing type entries. Change the | |
20647 | misleading `void' type to something sensible. */ | |
c906108c | 20648 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20649 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20650 | |
e142c38c | 20651 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20652 | /* In the case of DW_TAG_member, we should only be called for |
20653 | static const members. */ | |
20654 | if (die->tag == DW_TAG_member) | |
20655 | { | |
3863f96c DE |
20656 | /* dwarf2_add_field uses die_is_declaration, |
20657 | so we do the same. */ | |
254e6b9e DE |
20658 | gdb_assert (die_is_declaration (die, cu)); |
20659 | gdb_assert (attr); | |
20660 | } | |
435d3d88 | 20661 | if (attr != nullptr) |
c906108c | 20662 | { |
e7c27a73 | 20663 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20664 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20665 | if (!suppress_add) |
34eaf542 TT |
20666 | { |
20667 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 20668 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 20669 | else |
e37fd15a | 20670 | list_to_add = cu->list_in_scope; |
34eaf542 | 20671 | } |
c906108c SS |
20672 | break; |
20673 | } | |
e142c38c | 20674 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 20675 | if (attr != nullptr) |
c906108c | 20676 | { |
e7c27a73 | 20677 | var_decode_location (attr, sym, cu); |
e142c38c | 20678 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20679 | |
20680 | /* Fortran explicitly imports any global symbols to the local | |
20681 | scope by DW_TAG_common_block. */ | |
20682 | if (cu->language == language_fortran && die->parent | |
20683 | && die->parent->tag == DW_TAG_common_block) | |
20684 | attr2 = NULL; | |
20685 | ||
caac4577 JG |
20686 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20687 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20688 | && !dwarf2_per_objfile->has_section_at_zero) | |
20689 | { | |
20690 | /* When a static variable is eliminated by the linker, | |
20691 | the corresponding debug information is not stripped | |
20692 | out, but the variable address is set to null; | |
20693 | do not add such variables into symbol table. */ | |
20694 | } | |
20695 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20696 | { |
4b610737 TT |
20697 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20698 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
20699 | && dwarf2_per_objfile->can_copy) | |
20700 | { | |
20701 | /* A global static variable might be subject to | |
20702 | copy relocation. We first check for a local | |
20703 | minsym, though, because maybe the symbol was | |
20704 | marked hidden, in which case this would not | |
20705 | apply. */ | |
20706 | bound_minimal_symbol found | |
20707 | = (lookup_minimal_symbol_linkage | |
987012b8 | 20708 | (sym->linkage_name (), objfile)); |
4b610737 TT |
20709 | if (found.minsym != nullptr) |
20710 | sym->maybe_copied = 1; | |
20711 | } | |
f55ee35c | 20712 | |
1c809c68 TT |
20713 | /* A variable with DW_AT_external is never static, |
20714 | but it may be block-scoped. */ | |
804d2729 | 20715 | list_to_add |
c24bdb02 KS |
20716 | = ((cu->list_in_scope |
20717 | == cu->get_builder ()->get_file_symbols ()) | |
20718 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20719 | : cu->list_in_scope); |
1c809c68 | 20720 | } |
c906108c | 20721 | else |
e37fd15a | 20722 | list_to_add = cu->list_in_scope; |
c906108c SS |
20723 | } |
20724 | else | |
20725 | { | |
20726 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20727 | If it is an external symbol and we have type information |
20728 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20729 | The address of the variable will then be determined from | |
20730 | the minimal symbol table whenever the variable is | |
20731 | referenced. */ | |
e142c38c | 20732 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20733 | |
20734 | /* Fortran explicitly imports any global symbols to the local | |
20735 | scope by DW_TAG_common_block. */ | |
20736 | if (cu->language == language_fortran && die->parent | |
20737 | && die->parent->tag == DW_TAG_common_block) | |
20738 | { | |
20739 | /* SYMBOL_CLASS doesn't matter here because | |
20740 | read_common_block is going to reset it. */ | |
20741 | if (!suppress_add) | |
20742 | list_to_add = cu->list_in_scope; | |
20743 | } | |
20744 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20745 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20746 | { |
0fe7935b DJ |
20747 | /* A variable with DW_AT_external is never static, but it |
20748 | may be block-scoped. */ | |
804d2729 | 20749 | list_to_add |
c24bdb02 KS |
20750 | = ((cu->list_in_scope |
20751 | == cu->get_builder ()->get_file_symbols ()) | |
20752 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20753 | : cu->list_in_scope); |
0fe7935b | 20754 | |
f1e6e072 | 20755 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20756 | } |
442ddf59 JK |
20757 | else if (!die_is_declaration (die, cu)) |
20758 | { | |
20759 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20760 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20761 | if (!suppress_add) |
20762 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20763 | } |
c906108c SS |
20764 | } |
20765 | break; | |
20766 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
20767 | { |
20768 | /* If we are inside a function, mark this as an argument. If | |
20769 | not, we might be looking at an argument to an inlined function | |
20770 | when we do not have enough information to show inlined frames; | |
20771 | pretend it's a local variable in that case so that the user can | |
20772 | still see it. */ | |
804d2729 | 20773 | struct context_stack *curr |
c24bdb02 | 20774 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
20775 | if (curr != nullptr && curr->name != nullptr) |
20776 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
20777 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 20778 | if (attr != nullptr) |
a60f3166 TT |
20779 | { |
20780 | var_decode_location (attr, sym, cu); | |
20781 | } | |
20782 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 20783 | if (attr != nullptr) |
a60f3166 TT |
20784 | { |
20785 | dwarf2_const_value (attr, sym, cu); | |
20786 | } | |
f346a30d | 20787 | |
a60f3166 TT |
20788 | list_to_add = cu->list_in_scope; |
20789 | } | |
c906108c SS |
20790 | break; |
20791 | case DW_TAG_unspecified_parameters: | |
20792 | /* From varargs functions; gdb doesn't seem to have any | |
20793 | interest in this information, so just ignore it for now. | |
20794 | (FIXME?) */ | |
20795 | break; | |
34eaf542 TT |
20796 | case DW_TAG_template_type_param: |
20797 | suppress_add = 1; | |
20798 | /* Fall through. */ | |
c906108c | 20799 | case DW_TAG_class_type: |
680b30c7 | 20800 | case DW_TAG_interface_type: |
c906108c SS |
20801 | case DW_TAG_structure_type: |
20802 | case DW_TAG_union_type: | |
72019c9c | 20803 | case DW_TAG_set_type: |
c906108c | 20804 | case DW_TAG_enumeration_type: |
f1e6e072 | 20805 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20806 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20807 | |
63d06c5c | 20808 | { |
9c37b5ae | 20809 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20810 | really ever be static objects: otherwise, if you try |
20811 | to, say, break of a class's method and you're in a file | |
20812 | which doesn't mention that class, it won't work unless | |
20813 | the check for all static symbols in lookup_symbol_aux | |
20814 | saves you. See the OtherFileClass tests in | |
20815 | gdb.c++/namespace.exp. */ | |
20816 | ||
e37fd15a | 20817 | if (!suppress_add) |
34eaf542 | 20818 | { |
c24bdb02 | 20819 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 20820 | list_to_add |
c24bdb02 | 20821 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 20822 | && cu->language == language_cplus |
c24bdb02 | 20823 | ? builder->get_global_symbols () |
804d2729 | 20824 | : cu->list_in_scope); |
63d06c5c | 20825 | |
64382290 | 20826 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20827 | ... }" also defines a typedef for "foo". */ |
64382290 | 20828 | if (cu->language == language_cplus |
45280282 | 20829 | || cu->language == language_ada |
c44af4eb TT |
20830 | || cu->language == language_d |
20831 | || cu->language == language_rust) | |
64382290 TT |
20832 | { |
20833 | /* The symbol's name is already allocated along | |
20834 | with this objfile, so we don't need to | |
20835 | duplicate it for the type. */ | |
20836 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
987012b8 | 20837 | TYPE_NAME (SYMBOL_TYPE (sym)) = sym->search_name (); |
64382290 | 20838 | } |
63d06c5c DC |
20839 | } |
20840 | } | |
c906108c SS |
20841 | break; |
20842 | case DW_TAG_typedef: | |
f1e6e072 | 20843 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20844 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20845 | list_to_add = cu->list_in_scope; |
63d06c5c | 20846 | break; |
c906108c | 20847 | case DW_TAG_base_type: |
a02abb62 | 20848 | case DW_TAG_subrange_type: |
f1e6e072 | 20849 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20850 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20851 | list_to_add = cu->list_in_scope; |
c906108c SS |
20852 | break; |
20853 | case DW_TAG_enumerator: | |
e142c38c | 20854 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 20855 | if (attr != nullptr) |
c906108c | 20856 | { |
e7c27a73 | 20857 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20858 | } |
63d06c5c DC |
20859 | { |
20860 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20861 | DW_TAG_class_type, etc. block. */ | |
20862 | ||
804d2729 | 20863 | list_to_add |
c24bdb02 | 20864 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 20865 | && cu->language == language_cplus |
c24bdb02 | 20866 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 20867 | : cu->list_in_scope); |
63d06c5c | 20868 | } |
c906108c | 20869 | break; |
74921315 | 20870 | case DW_TAG_imported_declaration: |
5c4e30ca | 20871 | case DW_TAG_namespace: |
f1e6e072 | 20872 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 20873 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 20874 | break; |
530e8392 KB |
20875 | case DW_TAG_module: |
20876 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20877 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 20878 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 20879 | break; |
4357ac6c | 20880 | case DW_TAG_common_block: |
f1e6e072 | 20881 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 20882 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 20883 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 20884 | break; |
c906108c SS |
20885 | default: |
20886 | /* Not a tag we recognize. Hopefully we aren't processing | |
20887 | trash data, but since we must specifically ignore things | |
20888 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20889 | this point. */ |
b98664d3 | 20890 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 20891 | dwarf_tag_name (die->tag)); |
c906108c SS |
20892 | break; |
20893 | } | |
df8a16a1 | 20894 | |
e37fd15a SW |
20895 | if (suppress_add) |
20896 | { | |
20897 | sym->hash_next = objfile->template_symbols; | |
20898 | objfile->template_symbols = sym; | |
20899 | list_to_add = NULL; | |
20900 | } | |
20901 | ||
20902 | if (list_to_add != NULL) | |
d3cb6808 | 20903 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 20904 | |
df8a16a1 DJ |
20905 | /* For the benefit of old versions of GCC, check for anonymous |
20906 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20907 | if (!cu->processing_has_namespace_info |
94af9270 | 20908 | && cu->language == language_cplus) |
c24bdb02 | 20909 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
20910 | } |
20911 | return (sym); | |
20912 | } | |
20913 | ||
98bfdba5 PA |
20914 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20915 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20916 | standard (v4) is not entirely clear about the meaning of using | |
20917 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20918 | wider than the data. The conclusion of a discussion on the DWARF | |
20919 | list was that this is unspecified. We choose to always zero-extend | |
20920 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20921 | |
98bfdba5 | 20922 | static gdb_byte * |
ff39bb5e | 20923 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20924 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20925 | { |
518817b3 | 20926 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
20927 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20928 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20929 | LONGEST l = DW_UNSND (attr); |
20930 | ||
20931 | if (bits < sizeof (*value) * 8) | |
20932 | { | |
20933 | l &= ((LONGEST) 1 << bits) - 1; | |
20934 | *value = l; | |
20935 | } | |
20936 | else if (bits == sizeof (*value) * 8) | |
20937 | *value = l; | |
20938 | else | |
20939 | { | |
224c3ddb | 20940 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20941 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20942 | return bytes; | |
20943 | } | |
20944 | ||
20945 | return NULL; | |
20946 | } | |
20947 | ||
20948 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20949 | the value does not fit in *VALUE, set *BYTES - either already | |
20950 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20951 | or, set *BATON, if we translated the constant to a location | |
20952 | expression. */ | |
20953 | ||
20954 | static void | |
ff39bb5e | 20955 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20956 | const char *name, struct obstack *obstack, |
20957 | struct dwarf2_cu *cu, | |
d521ce57 | 20958 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20959 | struct dwarf2_locexpr_baton **baton) |
20960 | { | |
518817b3 | 20961 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 20962 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 20963 | struct dwarf_block *blk; |
98bfdba5 PA |
20964 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20965 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20966 | ||
20967 | *value = 0; | |
20968 | *bytes = NULL; | |
20969 | *baton = NULL; | |
c906108c SS |
20970 | |
20971 | switch (attr->form) | |
20972 | { | |
20973 | case DW_FORM_addr: | |
336d760d | 20974 | case DW_FORM_addrx: |
3019eac3 | 20975 | case DW_FORM_GNU_addr_index: |
ac56253d | 20976 | { |
ac56253d TT |
20977 | gdb_byte *data; |
20978 | ||
98bfdba5 PA |
20979 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20980 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20981 | cu_header->addr_size, |
98bfdba5 | 20982 | TYPE_LENGTH (type)); |
ac56253d TT |
20983 | /* Symbols of this form are reasonably rare, so we just |
20984 | piggyback on the existing location code rather than writing | |
20985 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20986 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20987 | (*baton)->per_cu = cu->per_cu; |
20988 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20989 | |
98bfdba5 | 20990 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20991 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20992 | (*baton)->data = data; |
ac56253d TT |
20993 | |
20994 | data[0] = DW_OP_addr; | |
20995 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20996 | byte_order, DW_ADDR (attr)); | |
20997 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20998 | } |
c906108c | 20999 | break; |
4ac36638 | 21000 | case DW_FORM_string: |
93b5768b | 21001 | case DW_FORM_strp: |
cf532bd1 | 21002 | case DW_FORM_strx: |
3019eac3 | 21003 | case DW_FORM_GNU_str_index: |
36586728 | 21004 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
21005 | /* DW_STRING is already allocated on the objfile obstack, point |
21006 | directly to it. */ | |
d521ce57 | 21007 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 21008 | break; |
c906108c SS |
21009 | case DW_FORM_block1: |
21010 | case DW_FORM_block2: | |
21011 | case DW_FORM_block4: | |
21012 | case DW_FORM_block: | |
2dc7f7b3 | 21013 | case DW_FORM_exprloc: |
0224619f | 21014 | case DW_FORM_data16: |
c906108c | 21015 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
21016 | if (TYPE_LENGTH (type) != blk->size) |
21017 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
21018 | TYPE_LENGTH (type)); | |
21019 | *bytes = blk->data; | |
c906108c | 21020 | break; |
2df3850c JM |
21021 | |
21022 | /* The DW_AT_const_value attributes are supposed to carry the | |
21023 | symbol's value "represented as it would be on the target | |
21024 | architecture." By the time we get here, it's already been | |
21025 | converted to host endianness, so we just need to sign- or | |
21026 | zero-extend it as appropriate. */ | |
21027 | case DW_FORM_data1: | |
3aef2284 | 21028 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21029 | break; |
c906108c | 21030 | case DW_FORM_data2: |
3aef2284 | 21031 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21032 | break; |
c906108c | 21033 | case DW_FORM_data4: |
3aef2284 | 21034 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21035 | break; |
c906108c | 21036 | case DW_FORM_data8: |
3aef2284 | 21037 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
21038 | break; |
21039 | ||
c906108c | 21040 | case DW_FORM_sdata: |
663c44ac | 21041 | case DW_FORM_implicit_const: |
98bfdba5 | 21042 | *value = DW_SND (attr); |
2df3850c JM |
21043 | break; |
21044 | ||
c906108c | 21045 | case DW_FORM_udata: |
98bfdba5 | 21046 | *value = DW_UNSND (attr); |
c906108c | 21047 | break; |
2df3850c | 21048 | |
c906108c | 21049 | default: |
b98664d3 | 21050 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 21051 | dwarf_form_name (attr->form)); |
98bfdba5 | 21052 | *value = 0; |
c906108c SS |
21053 | break; |
21054 | } | |
21055 | } | |
21056 | ||
2df3850c | 21057 | |
98bfdba5 PA |
21058 | /* Copy constant value from an attribute to a symbol. */ |
21059 | ||
2df3850c | 21060 | static void |
ff39bb5e | 21061 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 21062 | struct dwarf2_cu *cu) |
2df3850c | 21063 | { |
518817b3 | 21064 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 21065 | LONGEST value; |
d521ce57 | 21066 | const gdb_byte *bytes; |
98bfdba5 | 21067 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 21068 | |
98bfdba5 | 21069 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 21070 | sym->print_name (), |
98bfdba5 PA |
21071 | &objfile->objfile_obstack, cu, |
21072 | &value, &bytes, &baton); | |
2df3850c | 21073 | |
98bfdba5 PA |
21074 | if (baton != NULL) |
21075 | { | |
98bfdba5 | 21076 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21077 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21078 | } |
21079 | else if (bytes != NULL) | |
21080 | { | |
21081 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21082 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21083 | } |
21084 | else | |
21085 | { | |
21086 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21087 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21088 | } |
2df3850c JM |
21089 | } |
21090 | ||
c906108c SS |
21091 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21092 | ||
21093 | static struct type * | |
e7c27a73 | 21094 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21095 | { |
c906108c | 21096 | struct attribute *type_attr; |
c906108c | 21097 | |
e142c38c | 21098 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21099 | if (!type_attr) |
21100 | { | |
518817b3 | 21101 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21102 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 21103 | return objfile_type (objfile)->builtin_void; |
c906108c | 21104 | } |
348e048f | 21105 | |
673bfd45 | 21106 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21107 | } |
21108 | ||
b4ba55a1 JB |
21109 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21110 | that allows to find parallel types through that information instead | |
21111 | of having to do expensive parallel lookups by type name. */ | |
21112 | ||
21113 | static int | |
21114 | need_gnat_info (struct dwarf2_cu *cu) | |
21115 | { | |
de4cb04a JB |
21116 | /* Assume that the Ada compiler was GNAT, which always produces |
21117 | the auxiliary information. */ | |
21118 | return (cu->language == language_ada); | |
b4ba55a1 JB |
21119 | } |
21120 | ||
b4ba55a1 JB |
21121 | /* Return the auxiliary type of the die in question using its |
21122 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21123 | attribute is not present. */ | |
21124 | ||
21125 | static struct type * | |
21126 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21127 | { | |
b4ba55a1 | 21128 | struct attribute *type_attr; |
b4ba55a1 JB |
21129 | |
21130 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21131 | if (!type_attr) | |
21132 | return NULL; | |
21133 | ||
673bfd45 | 21134 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21135 | } |
21136 | ||
21137 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21138 | descriptive type accordingly. */ | |
21139 | ||
21140 | static void | |
21141 | set_descriptive_type (struct type *type, struct die_info *die, | |
21142 | struct dwarf2_cu *cu) | |
21143 | { | |
21144 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21145 | ||
21146 | if (descriptive_type) | |
21147 | { | |
21148 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21149 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21150 | } | |
21151 | } | |
21152 | ||
c906108c SS |
21153 | /* Return the containing type of the die in question using its |
21154 | DW_AT_containing_type attribute. */ | |
21155 | ||
21156 | static struct type * | |
e7c27a73 | 21157 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21158 | { |
c906108c | 21159 | struct attribute *type_attr; |
518817b3 | 21160 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21161 | |
e142c38c | 21162 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21163 | if (!type_attr) |
21164 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 21165 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 21166 | |
673bfd45 | 21167 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21168 | } |
21169 | ||
ac9ec31b DE |
21170 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21171 | ||
21172 | static struct type * | |
21173 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21174 | { | |
518817b3 SM |
21175 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21176 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 21177 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 21178 | char *saved; |
ac9ec31b | 21179 | |
528e1572 SM |
21180 | std::string message |
21181 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
21182 | objfile_name (objfile), | |
21183 | sect_offset_str (cu->header.sect_off), | |
21184 | sect_offset_str (die->sect_off)); | |
efba19b0 | 21185 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 21186 | |
19f392bc | 21187 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21188 | } |
21189 | ||
673bfd45 | 21190 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21191 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21192 | DW_AT_containing_type. | |
673bfd45 DE |
21193 | If there is no type substitute an error marker. */ |
21194 | ||
c906108c | 21195 | static struct type * |
ff39bb5e | 21196 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21197 | struct dwarf2_cu *cu) |
c906108c | 21198 | { |
518817b3 SM |
21199 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21200 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21201 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
21202 | struct type *this_type; |
21203 | ||
ac9ec31b DE |
21204 | gdb_assert (attr->name == DW_AT_type |
21205 | || attr->name == DW_AT_GNAT_descriptive_type | |
21206 | || attr->name == DW_AT_containing_type); | |
21207 | ||
673bfd45 DE |
21208 | /* First see if we have it cached. */ |
21209 | ||
36586728 TT |
21210 | if (attr->form == DW_FORM_GNU_ref_alt) |
21211 | { | |
21212 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 21213 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 21214 | |
ed2dc618 SM |
21215 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
21216 | dwarf2_per_objfile); | |
9c541725 | 21217 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 21218 | } |
cd6c91b4 | 21219 | else if (attr->form_is_ref ()) |
673bfd45 | 21220 | { |
9c541725 | 21221 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 21222 | |
9c541725 | 21223 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21224 | } |
55f1336d | 21225 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21226 | { |
ac9ec31b | 21227 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21228 | |
ac9ec31b | 21229 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21230 | } |
21231 | else | |
21232 | { | |
b98664d3 | 21233 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
21234 | " at %s [in module %s]"), |
21235 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 21236 | objfile_name (objfile)); |
ac9ec31b | 21237 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21238 | } |
21239 | ||
21240 | /* If not cached we need to read it in. */ | |
21241 | ||
21242 | if (this_type == NULL) | |
21243 | { | |
ac9ec31b | 21244 | struct die_info *type_die = NULL; |
673bfd45 DE |
21245 | struct dwarf2_cu *type_cu = cu; |
21246 | ||
cd6c91b4 | 21247 | if (attr->form_is_ref ()) |
ac9ec31b DE |
21248 | type_die = follow_die_ref (die, attr, &type_cu); |
21249 | if (type_die == NULL) | |
21250 | return build_error_marker_type (cu, die); | |
21251 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21252 | from an inter-CU reference and the type's CU got expanded before |
21253 | ours. */ | |
ac9ec31b | 21254 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21255 | } |
21256 | ||
21257 | /* If we still don't have a type use an error marker. */ | |
21258 | ||
21259 | if (this_type == NULL) | |
ac9ec31b | 21260 | return build_error_marker_type (cu, die); |
673bfd45 | 21261 | |
f792889a | 21262 | return this_type; |
c906108c SS |
21263 | } |
21264 | ||
673bfd45 DE |
21265 | /* Return the type in DIE, CU. |
21266 | Returns NULL for invalid types. | |
21267 | ||
02142a6c | 21268 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21269 | and only reads the die in if necessary. |
21270 | ||
21271 | NOTE: This can be called when reading in partial or full symbols. */ | |
21272 | ||
f792889a | 21273 | static struct type * |
e7c27a73 | 21274 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21275 | { |
f792889a DJ |
21276 | struct type *this_type; |
21277 | ||
21278 | this_type = get_die_type (die, cu); | |
21279 | if (this_type) | |
21280 | return this_type; | |
21281 | ||
673bfd45 DE |
21282 | return read_type_die_1 (die, cu); |
21283 | } | |
21284 | ||
21285 | /* Read the type in DIE, CU. | |
21286 | Returns NULL for invalid types. */ | |
21287 | ||
21288 | static struct type * | |
21289 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21290 | { | |
21291 | struct type *this_type = NULL; | |
21292 | ||
c906108c SS |
21293 | switch (die->tag) |
21294 | { | |
21295 | case DW_TAG_class_type: | |
680b30c7 | 21296 | case DW_TAG_interface_type: |
c906108c SS |
21297 | case DW_TAG_structure_type: |
21298 | case DW_TAG_union_type: | |
f792889a | 21299 | this_type = read_structure_type (die, cu); |
c906108c SS |
21300 | break; |
21301 | case DW_TAG_enumeration_type: | |
f792889a | 21302 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21303 | break; |
21304 | case DW_TAG_subprogram: | |
21305 | case DW_TAG_subroutine_type: | |
edb3359d | 21306 | case DW_TAG_inlined_subroutine: |
f792889a | 21307 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21308 | break; |
21309 | case DW_TAG_array_type: | |
f792889a | 21310 | this_type = read_array_type (die, cu); |
c906108c | 21311 | break; |
72019c9c | 21312 | case DW_TAG_set_type: |
f792889a | 21313 | this_type = read_set_type (die, cu); |
72019c9c | 21314 | break; |
c906108c | 21315 | case DW_TAG_pointer_type: |
f792889a | 21316 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21317 | break; |
21318 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21319 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21320 | break; |
21321 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21322 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21323 | break; | |
21324 | case DW_TAG_rvalue_reference_type: | |
21325 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21326 | break; |
21327 | case DW_TAG_const_type: | |
f792889a | 21328 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21329 | break; |
21330 | case DW_TAG_volatile_type: | |
f792889a | 21331 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21332 | break; |
06d66ee9 TT |
21333 | case DW_TAG_restrict_type: |
21334 | this_type = read_tag_restrict_type (die, cu); | |
21335 | break; | |
c906108c | 21336 | case DW_TAG_string_type: |
f792889a | 21337 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21338 | break; |
21339 | case DW_TAG_typedef: | |
f792889a | 21340 | this_type = read_typedef (die, cu); |
c906108c | 21341 | break; |
a02abb62 | 21342 | case DW_TAG_subrange_type: |
f792889a | 21343 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21344 | break; |
c906108c | 21345 | case DW_TAG_base_type: |
f792889a | 21346 | this_type = read_base_type (die, cu); |
c906108c | 21347 | break; |
81a17f79 | 21348 | case DW_TAG_unspecified_type: |
f792889a | 21349 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21350 | break; |
0114d602 DJ |
21351 | case DW_TAG_namespace: |
21352 | this_type = read_namespace_type (die, cu); | |
21353 | break; | |
f55ee35c JK |
21354 | case DW_TAG_module: |
21355 | this_type = read_module_type (die, cu); | |
21356 | break; | |
a2c2acaf MW |
21357 | case DW_TAG_atomic_type: |
21358 | this_type = read_tag_atomic_type (die, cu); | |
21359 | break; | |
c906108c | 21360 | default: |
b98664d3 | 21361 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 21362 | dwarf_tag_name (die->tag)); |
c906108c SS |
21363 | break; |
21364 | } | |
63d06c5c | 21365 | |
f792889a | 21366 | return this_type; |
63d06c5c DC |
21367 | } |
21368 | ||
abc72ce4 DE |
21369 | /* See if we can figure out if the class lives in a namespace. We do |
21370 | this by looking for a member function; its demangled name will | |
21371 | contain namespace info, if there is any. | |
21372 | Return the computed name or NULL. | |
21373 | Space for the result is allocated on the objfile's obstack. | |
21374 | This is the full-die version of guess_partial_die_structure_name. | |
21375 | In this case we know DIE has no useful parent. */ | |
21376 | ||
43816ebc | 21377 | static const char * |
abc72ce4 DE |
21378 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
21379 | { | |
21380 | struct die_info *spec_die; | |
21381 | struct dwarf2_cu *spec_cu; | |
21382 | struct die_info *child; | |
518817b3 | 21383 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
21384 | |
21385 | spec_cu = cu; | |
21386 | spec_die = die_specification (die, &spec_cu); | |
21387 | if (spec_die != NULL) | |
21388 | { | |
21389 | die = spec_die; | |
21390 | cu = spec_cu; | |
21391 | } | |
21392 | ||
21393 | for (child = die->child; | |
21394 | child != NULL; | |
21395 | child = child->sibling) | |
21396 | { | |
21397 | if (child->tag == DW_TAG_subprogram) | |
21398 | { | |
73b9be8b | 21399 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 21400 | |
7d45c7c3 | 21401 | if (linkage_name != NULL) |
abc72ce4 | 21402 | { |
43816ebc TT |
21403 | gdb::unique_xmalloc_ptr<char> actual_name |
21404 | (language_class_name_from_physname (cu->language_defn, | |
21405 | linkage_name)); | |
21406 | const char *name = NULL; | |
abc72ce4 DE |
21407 | |
21408 | if (actual_name != NULL) | |
21409 | { | |
15d034d0 | 21410 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
21411 | |
21412 | if (die_name != NULL | |
43816ebc | 21413 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
21414 | { |
21415 | /* Strip off the class name from the full name. | |
21416 | We want the prefix. */ | |
21417 | int die_name_len = strlen (die_name); | |
43816ebc TT |
21418 | int actual_name_len = strlen (actual_name.get ()); |
21419 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
21420 | |
21421 | /* Test for '::' as a sanity check. */ | |
21422 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 21423 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 21424 | name = obstack_strndup ( |
e3b94546 | 21425 | &objfile->per_bfd->storage_obstack, |
43816ebc | 21426 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
21427 | } |
21428 | } | |
abc72ce4 DE |
21429 | return name; |
21430 | } | |
21431 | } | |
21432 | } | |
21433 | ||
21434 | return NULL; | |
21435 | } | |
21436 | ||
96408a79 SA |
21437 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
21438 | prefix part in such case. See | |
21439 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21440 | ||
a121b7c1 | 21441 | static const char * |
96408a79 SA |
21442 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
21443 | { | |
21444 | struct attribute *attr; | |
e6a959d6 | 21445 | const char *base; |
96408a79 SA |
21446 | |
21447 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
21448 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
21449 | return NULL; | |
21450 | ||
7d45c7c3 | 21451 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
21452 | return NULL; |
21453 | ||
73b9be8b | 21454 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
21455 | if (attr == NULL || DW_STRING (attr) == NULL) |
21456 | return NULL; | |
21457 | ||
21458 | /* dwarf2_name had to be already called. */ | |
21459 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
21460 | ||
21461 | /* Strip the base name, keep any leading namespaces/classes. */ | |
21462 | base = strrchr (DW_STRING (attr), ':'); | |
21463 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
21464 | return ""; | |
21465 | ||
518817b3 | 21466 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
21467 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
21468 | DW_STRING (attr), | |
21469 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
21470 | } |
21471 | ||
fdde2d81 | 21472 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 21473 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 21474 | |
0114d602 DJ |
21475 | For example, if we're within the method foo() in the following |
21476 | code: | |
21477 | ||
21478 | namespace N { | |
21479 | class C { | |
21480 | void foo () { | |
21481 | } | |
21482 | }; | |
21483 | } | |
21484 | ||
21485 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 21486 | |
0d5cff50 | 21487 | static const char * |
e142c38c | 21488 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 21489 | { |
518817b3 SM |
21490 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21491 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
21492 | struct die_info *parent, *spec_die; |
21493 | struct dwarf2_cu *spec_cu; | |
21494 | struct type *parent_type; | |
a121b7c1 | 21495 | const char *retval; |
63d06c5c | 21496 | |
9c37b5ae | 21497 | if (cu->language != language_cplus |
c44af4eb TT |
21498 | && cu->language != language_fortran && cu->language != language_d |
21499 | && cu->language != language_rust) | |
0114d602 DJ |
21500 | return ""; |
21501 | ||
96408a79 SA |
21502 | retval = anonymous_struct_prefix (die, cu); |
21503 | if (retval) | |
21504 | return retval; | |
21505 | ||
0114d602 DJ |
21506 | /* We have to be careful in the presence of DW_AT_specification. |
21507 | For example, with GCC 3.4, given the code | |
21508 | ||
21509 | namespace N { | |
21510 | void foo() { | |
21511 | // Definition of N::foo. | |
21512 | } | |
21513 | } | |
21514 | ||
21515 | then we'll have a tree of DIEs like this: | |
21516 | ||
21517 | 1: DW_TAG_compile_unit | |
21518 | 2: DW_TAG_namespace // N | |
21519 | 3: DW_TAG_subprogram // declaration of N::foo | |
21520 | 4: DW_TAG_subprogram // definition of N::foo | |
21521 | DW_AT_specification // refers to die #3 | |
21522 | ||
21523 | Thus, when processing die #4, we have to pretend that we're in | |
21524 | the context of its DW_AT_specification, namely the contex of die | |
21525 | #3. */ | |
21526 | spec_cu = cu; | |
21527 | spec_die = die_specification (die, &spec_cu); | |
21528 | if (spec_die == NULL) | |
21529 | parent = die->parent; | |
21530 | else | |
63d06c5c | 21531 | { |
0114d602 DJ |
21532 | parent = spec_die->parent; |
21533 | cu = spec_cu; | |
63d06c5c | 21534 | } |
0114d602 DJ |
21535 | |
21536 | if (parent == NULL) | |
21537 | return ""; | |
98bfdba5 PA |
21538 | else if (parent->building_fullname) |
21539 | { | |
21540 | const char *name; | |
21541 | const char *parent_name; | |
21542 | ||
21543 | /* It has been seen on RealView 2.2 built binaries, | |
21544 | DW_TAG_template_type_param types actually _defined_ as | |
21545 | children of the parent class: | |
21546 | ||
21547 | enum E {}; | |
21548 | template class <class Enum> Class{}; | |
21549 | Class<enum E> class_e; | |
21550 | ||
21551 | 1: DW_TAG_class_type (Class) | |
21552 | 2: DW_TAG_enumeration_type (E) | |
21553 | 3: DW_TAG_enumerator (enum1:0) | |
21554 | 3: DW_TAG_enumerator (enum2:1) | |
21555 | ... | |
21556 | 2: DW_TAG_template_type_param | |
21557 | DW_AT_type DW_FORM_ref_udata (E) | |
21558 | ||
21559 | Besides being broken debug info, it can put GDB into an | |
21560 | infinite loop. Consider: | |
21561 | ||
21562 | When we're building the full name for Class<E>, we'll start | |
21563 | at Class, and go look over its template type parameters, | |
21564 | finding E. We'll then try to build the full name of E, and | |
21565 | reach here. We're now trying to build the full name of E, | |
21566 | and look over the parent DIE for containing scope. In the | |
21567 | broken case, if we followed the parent DIE of E, we'd again | |
21568 | find Class, and once again go look at its template type | |
21569 | arguments, etc., etc. Simply don't consider such parent die | |
21570 | as source-level parent of this die (it can't be, the language | |
21571 | doesn't allow it), and break the loop here. */ | |
21572 | name = dwarf2_name (die, cu); | |
21573 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 21574 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
21575 | name ? name : "<unknown>", |
21576 | parent_name ? parent_name : "<unknown>"); | |
21577 | return ""; | |
21578 | } | |
63d06c5c | 21579 | else |
0114d602 DJ |
21580 | switch (parent->tag) |
21581 | { | |
63d06c5c | 21582 | case DW_TAG_namespace: |
0114d602 | 21583 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
21584 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
21585 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
21586 | Work around this problem here. */ | |
21587 | if (cu->language == language_cplus | |
e86ca25f | 21588 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 21589 | return ""; |
0114d602 | 21590 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 21591 | return TYPE_NAME (parent_type); |
63d06c5c | 21592 | case DW_TAG_class_type: |
680b30c7 | 21593 | case DW_TAG_interface_type: |
63d06c5c | 21594 | case DW_TAG_structure_type: |
0114d602 | 21595 | case DW_TAG_union_type: |
f55ee35c | 21596 | case DW_TAG_module: |
0114d602 | 21597 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
21598 | if (TYPE_NAME (parent_type) != NULL) |
21599 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
21600 | else |
21601 | /* An anonymous structure is only allowed non-static data | |
21602 | members; no typedefs, no member functions, et cetera. | |
21603 | So it does not need a prefix. */ | |
21604 | return ""; | |
abc72ce4 | 21605 | case DW_TAG_compile_unit: |
95554aad | 21606 | case DW_TAG_partial_unit: |
abc72ce4 DE |
21607 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
21608 | if (cu->language == language_cplus | |
fd5866f6 | 21609 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
21610 | && die->child != NULL |
21611 | && (die->tag == DW_TAG_class_type | |
21612 | || die->tag == DW_TAG_structure_type | |
21613 | || die->tag == DW_TAG_union_type)) | |
21614 | { | |
43816ebc | 21615 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
21616 | if (name != NULL) |
21617 | return name; | |
21618 | } | |
21619 | return ""; | |
0a4b0913 AB |
21620 | case DW_TAG_subprogram: |
21621 | /* Nested subroutines in Fortran get a prefix with the name | |
21622 | of the parent's subroutine. */ | |
21623 | if (cu->language == language_fortran) | |
21624 | { | |
21625 | if ((die->tag == DW_TAG_subprogram) | |
21626 | && (dwarf2_name (parent, cu) != NULL)) | |
21627 | return dwarf2_name (parent, cu); | |
21628 | } | |
21629 | return determine_prefix (parent, cu); | |
3d567982 TT |
21630 | case DW_TAG_enumeration_type: |
21631 | parent_type = read_type_die (parent, cu); | |
21632 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21633 | { | |
e86ca25f TT |
21634 | if (TYPE_NAME (parent_type) != NULL) |
21635 | return TYPE_NAME (parent_type); | |
3d567982 TT |
21636 | return ""; |
21637 | } | |
21638 | /* Fall through. */ | |
63d06c5c | 21639 | default: |
8176b9b8 | 21640 | return determine_prefix (parent, cu); |
63d06c5c | 21641 | } |
63d06c5c DC |
21642 | } |
21643 | ||
3e43a32a MS |
21644 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21645 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21646 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21647 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21648 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21649 | |
f55ee35c | 21650 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21651 | |
21652 | static char * | |
f55ee35c JK |
21653 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21654 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21655 | { |
f55ee35c | 21656 | const char *lead = ""; |
5c315b68 | 21657 | const char *sep; |
63d06c5c | 21658 | |
3e43a32a MS |
21659 | if (suffix == NULL || suffix[0] == '\0' |
21660 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21661 | sep = ""; |
45280282 IB |
21662 | else if (cu->language == language_d) |
21663 | { | |
21664 | /* For D, the 'main' function could be defined in any module, but it | |
21665 | should never be prefixed. */ | |
21666 | if (strcmp (suffix, "D main") == 0) | |
21667 | { | |
21668 | prefix = ""; | |
21669 | sep = ""; | |
21670 | } | |
21671 | else | |
21672 | sep = "."; | |
21673 | } | |
f55ee35c JK |
21674 | else if (cu->language == language_fortran && physname) |
21675 | { | |
21676 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21677 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21678 | ||
21679 | lead = "__"; | |
21680 | sep = "_MOD_"; | |
21681 | } | |
987504bb JJ |
21682 | else |
21683 | sep = "::"; | |
63d06c5c | 21684 | |
6dd47d34 DE |
21685 | if (prefix == NULL) |
21686 | prefix = ""; | |
21687 | if (suffix == NULL) | |
21688 | suffix = ""; | |
21689 | ||
987504bb JJ |
21690 | if (obs == NULL) |
21691 | { | |
3e43a32a | 21692 | char *retval |
224c3ddb SM |
21693 | = ((char *) |
21694 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21695 | |
f55ee35c JK |
21696 | strcpy (retval, lead); |
21697 | strcat (retval, prefix); | |
6dd47d34 DE |
21698 | strcat (retval, sep); |
21699 | strcat (retval, suffix); | |
63d06c5c DC |
21700 | return retval; |
21701 | } | |
987504bb JJ |
21702 | else |
21703 | { | |
21704 | /* We have an obstack. */ | |
f55ee35c | 21705 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21706 | } |
63d06c5c DC |
21707 | } |
21708 | ||
c906108c SS |
21709 | /* Return sibling of die, NULL if no sibling. */ |
21710 | ||
f9aca02d | 21711 | static struct die_info * |
fba45db2 | 21712 | sibling_die (struct die_info *die) |
c906108c | 21713 | { |
639d11d3 | 21714 | return die->sibling; |
c906108c SS |
21715 | } |
21716 | ||
71c25dea TT |
21717 | /* Get name of a die, return NULL if not found. */ |
21718 | ||
15d034d0 TT |
21719 | static const char * |
21720 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
be1e3d3e | 21721 | struct objfile *objfile) |
71c25dea TT |
21722 | { |
21723 | if (name && cu->language == language_cplus) | |
21724 | { | |
2f408ecb | 21725 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21726 | |
2f408ecb | 21727 | if (!canon_name.empty ()) |
71c25dea | 21728 | { |
2f408ecb | 21729 | if (canon_name != name) |
be1e3d3e | 21730 | name = objfile->intern (canon_name); |
71c25dea TT |
21731 | } |
21732 | } | |
21733 | ||
21734 | return name; | |
c906108c SS |
21735 | } |
21736 | ||
96553a0c DE |
21737 | /* Get name of a die, return NULL if not found. |
21738 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21739 | |
15d034d0 | 21740 | static const char * |
e142c38c | 21741 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21742 | { |
21743 | struct attribute *attr; | |
518817b3 | 21744 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 21745 | |
e142c38c | 21746 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21747 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21748 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21749 | && die->tag != DW_TAG_class_type |
21750 | && die->tag != DW_TAG_interface_type | |
21751 | && die->tag != DW_TAG_structure_type | |
21752 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21753 | return NULL; |
21754 | ||
21755 | switch (die->tag) | |
21756 | { | |
21757 | case DW_TAG_compile_unit: | |
95554aad | 21758 | case DW_TAG_partial_unit: |
71c25dea TT |
21759 | /* Compilation units have a DW_AT_name that is a filename, not |
21760 | a source language identifier. */ | |
21761 | case DW_TAG_enumeration_type: | |
21762 | case DW_TAG_enumerator: | |
21763 | /* These tags always have simple identifiers already; no need | |
21764 | to canonicalize them. */ | |
21765 | return DW_STRING (attr); | |
907af001 | 21766 | |
96553a0c DE |
21767 | case DW_TAG_namespace: |
21768 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21769 | return DW_STRING (attr); | |
21770 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21771 | ||
907af001 UW |
21772 | case DW_TAG_class_type: |
21773 | case DW_TAG_interface_type: | |
21774 | case DW_TAG_structure_type: | |
21775 | case DW_TAG_union_type: | |
21776 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21777 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21778 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21779 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21780 | if (attr && DW_STRING (attr) |
61012eef GB |
21781 | && (startswith (DW_STRING (attr), "._") |
21782 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21783 | return NULL; |
53832f31 TT |
21784 | |
21785 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21786 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21787 | if (!attr || DW_STRING (attr) == NULL) | |
21788 | { | |
73b9be8b | 21789 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21790 | if (attr == NULL || DW_STRING (attr) == NULL) |
21791 | return NULL; | |
21792 | ||
df5c6c50 JK |
21793 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21794 | call for the same DIE. */ | |
21795 | if (!DW_STRING_IS_CANONICAL (attr)) | |
53832f31 | 21796 | { |
43816ebc TT |
21797 | gdb::unique_xmalloc_ptr<char> demangled |
21798 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); | |
4f180d53 AT |
21799 | if (demangled == nullptr) |
21800 | return nullptr; | |
43816ebc | 21801 | |
be1e3d3e | 21802 | DW_STRING (attr) = objfile->intern (demangled.get ()); |
53832f31 | 21803 | DW_STRING_IS_CANONICAL (attr) = 1; |
53832f31 | 21804 | } |
67430cd0 TT |
21805 | |
21806 | /* Strip any leading namespaces/classes, keep only the base name. | |
21807 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21808 | const char *base = strrchr (DW_STRING (attr), ':'); | |
21809 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21810 | return &base[1]; | |
21811 | else | |
21812 | return DW_STRING (attr); | |
53832f31 | 21813 | } |
907af001 UW |
21814 | break; |
21815 | ||
71c25dea | 21816 | default: |
907af001 UW |
21817 | break; |
21818 | } | |
21819 | ||
21820 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21821 | { | |
be1e3d3e TT |
21822 | DW_STRING (attr) = dwarf2_canonicalize_name (DW_STRING (attr), cu, |
21823 | objfile); | |
907af001 | 21824 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21825 | } |
907af001 | 21826 | return DW_STRING (attr); |
9219021c DC |
21827 | } |
21828 | ||
21829 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21830 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21831 | containing the return value on output. */ | |
9219021c DC |
21832 | |
21833 | static struct die_info * | |
f2f0e013 | 21834 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21835 | { |
21836 | struct attribute *attr; | |
9219021c | 21837 | |
f2f0e013 | 21838 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21839 | if (attr == NULL) |
21840 | return NULL; | |
21841 | ||
f2f0e013 | 21842 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21843 | } |
21844 | ||
fa9c3fa0 TT |
21845 | /* A convenience function that returns an "unknown" DWARF name, |
21846 | including the value of V. STR is the name of the entity being | |
21847 | printed, e.g., "TAG". */ | |
21848 | ||
21849 | static const char * | |
21850 | dwarf_unknown (const char *str, unsigned v) | |
21851 | { | |
21852 | char *cell = get_print_cell (); | |
21853 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
21854 | return cell; | |
21855 | } | |
21856 | ||
c906108c SS |
21857 | /* Convert a DIE tag into its string name. */ |
21858 | ||
f39c6ffd | 21859 | static const char * |
aa1ee363 | 21860 | dwarf_tag_name (unsigned tag) |
c906108c | 21861 | { |
f39c6ffd TT |
21862 | const char *name = get_DW_TAG_name (tag); |
21863 | ||
21864 | if (name == NULL) | |
fa9c3fa0 | 21865 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
21866 | |
21867 | return name; | |
c906108c SS |
21868 | } |
21869 | ||
21870 | /* Convert a DWARF attribute code into its string name. */ | |
21871 | ||
f39c6ffd | 21872 | static const char * |
aa1ee363 | 21873 | dwarf_attr_name (unsigned attr) |
c906108c | 21874 | { |
f39c6ffd TT |
21875 | const char *name; |
21876 | ||
c764a876 | 21877 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21878 | if (attr == DW_AT_MIPS_fde) |
21879 | return "DW_AT_MIPS_fde"; | |
21880 | #else | |
21881 | if (attr == DW_AT_HP_block_index) | |
21882 | return "DW_AT_HP_block_index"; | |
c764a876 | 21883 | #endif |
f39c6ffd TT |
21884 | |
21885 | name = get_DW_AT_name (attr); | |
21886 | ||
21887 | if (name == NULL) | |
fa9c3fa0 | 21888 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
21889 | |
21890 | return name; | |
c906108c SS |
21891 | } |
21892 | ||
21893 | /* Convert a DWARF value form code into its string name. */ | |
21894 | ||
f39c6ffd | 21895 | static const char * |
aa1ee363 | 21896 | dwarf_form_name (unsigned form) |
c906108c | 21897 | { |
f39c6ffd TT |
21898 | const char *name = get_DW_FORM_name (form); |
21899 | ||
21900 | if (name == NULL) | |
fa9c3fa0 | 21901 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
21902 | |
21903 | return name; | |
c906108c SS |
21904 | } |
21905 | ||
a121b7c1 | 21906 | static const char * |
fba45db2 | 21907 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21908 | { |
21909 | if (mybool) | |
21910 | return "TRUE"; | |
21911 | else | |
21912 | return "FALSE"; | |
21913 | } | |
21914 | ||
21915 | /* Convert a DWARF type code into its string name. */ | |
21916 | ||
f39c6ffd | 21917 | static const char * |
aa1ee363 | 21918 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21919 | { |
f39c6ffd | 21920 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21921 | |
f39c6ffd | 21922 | if (name == NULL) |
fa9c3fa0 | 21923 | return dwarf_unknown ("ATE", enc); |
c906108c | 21924 | |
f39c6ffd | 21925 | return name; |
c906108c | 21926 | } |
c906108c | 21927 | |
f9aca02d | 21928 | static void |
d97bc12b | 21929 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21930 | { |
21931 | unsigned int i; | |
21932 | ||
d97bc12b | 21933 | print_spaces (indent, f); |
9d8780f0 | 21934 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 21935 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 21936 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
21937 | |
21938 | if (die->parent != NULL) | |
21939 | { | |
21940 | print_spaces (indent, f); | |
9d8780f0 SM |
21941 | fprintf_unfiltered (f, " parent at offset: %s\n", |
21942 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
21943 | } |
21944 | ||
21945 | print_spaces (indent, f); | |
21946 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21947 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21948 | |
d97bc12b DE |
21949 | print_spaces (indent, f); |
21950 | fprintf_unfiltered (f, " attributes:\n"); | |
21951 | ||
c906108c SS |
21952 | for (i = 0; i < die->num_attrs; ++i) |
21953 | { | |
d97bc12b DE |
21954 | print_spaces (indent, f); |
21955 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21956 | dwarf_attr_name (die->attrs[i].name), |
21957 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21958 | |
c906108c SS |
21959 | switch (die->attrs[i].form) |
21960 | { | |
c906108c | 21961 | case DW_FORM_addr: |
336d760d | 21962 | case DW_FORM_addrx: |
3019eac3 | 21963 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21964 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21965 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21966 | break; |
21967 | case DW_FORM_block2: | |
21968 | case DW_FORM_block4: | |
21969 | case DW_FORM_block: | |
21970 | case DW_FORM_block1: | |
56eb65bd SP |
21971 | fprintf_unfiltered (f, "block: size %s", |
21972 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21973 | break; |
2dc7f7b3 | 21974 | case DW_FORM_exprloc: |
56eb65bd SP |
21975 | fprintf_unfiltered (f, "expression: size %s", |
21976 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21977 | break; |
0224619f JK |
21978 | case DW_FORM_data16: |
21979 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21980 | break; | |
4568ecf9 DE |
21981 | case DW_FORM_ref_addr: |
21982 | fprintf_unfiltered (f, "ref address: "); | |
21983 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21984 | break; | |
36586728 TT |
21985 | case DW_FORM_GNU_ref_alt: |
21986 | fprintf_unfiltered (f, "alt ref address: "); | |
21987 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21988 | break; | |
10b3939b DJ |
21989 | case DW_FORM_ref1: |
21990 | case DW_FORM_ref2: | |
21991 | case DW_FORM_ref4: | |
4568ecf9 DE |
21992 | case DW_FORM_ref8: |
21993 | case DW_FORM_ref_udata: | |
d97bc12b | 21994 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21995 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21996 | break; |
c906108c SS |
21997 | case DW_FORM_data1: |
21998 | case DW_FORM_data2: | |
21999 | case DW_FORM_data4: | |
ce5d95e1 | 22000 | case DW_FORM_data8: |
c906108c SS |
22001 | case DW_FORM_udata: |
22002 | case DW_FORM_sdata: | |
43bbcdc2 PH |
22003 | fprintf_unfiltered (f, "constant: %s", |
22004 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 22005 | break; |
2dc7f7b3 TT |
22006 | case DW_FORM_sec_offset: |
22007 | fprintf_unfiltered (f, "section offset: %s", | |
22008 | pulongest (DW_UNSND (&die->attrs[i]))); | |
22009 | break; | |
55f1336d | 22010 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
22011 | fprintf_unfiltered (f, "signature: %s", |
22012 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 22013 | break; |
c906108c | 22014 | case DW_FORM_string: |
4bdf3d34 | 22015 | case DW_FORM_strp: |
43988095 | 22016 | case DW_FORM_line_strp: |
cf532bd1 | 22017 | case DW_FORM_strx: |
3019eac3 | 22018 | case DW_FORM_GNU_str_index: |
36586728 | 22019 | case DW_FORM_GNU_strp_alt: |
8285870a | 22020 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 22021 | DW_STRING (&die->attrs[i]) |
8285870a JK |
22022 | ? DW_STRING (&die->attrs[i]) : "", |
22023 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
22024 | break; |
22025 | case DW_FORM_flag: | |
22026 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 22027 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22028 | else |
d97bc12b | 22029 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22030 | break; |
2dc7f7b3 TT |
22031 | case DW_FORM_flag_present: |
22032 | fprintf_unfiltered (f, "flag: TRUE"); | |
22033 | break; | |
a8329558 | 22034 | case DW_FORM_indirect: |
0963b4bd MS |
22035 | /* The reader will have reduced the indirect form to |
22036 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 22037 | fprintf_unfiltered (f, |
3e43a32a | 22038 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 22039 | break; |
663c44ac JK |
22040 | case DW_FORM_implicit_const: |
22041 | fprintf_unfiltered (f, "constant: %s", | |
22042 | plongest (DW_SND (&die->attrs[i]))); | |
22043 | break; | |
c906108c | 22044 | default: |
d97bc12b | 22045 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22046 | die->attrs[i].form); |
d97bc12b | 22047 | break; |
c906108c | 22048 | } |
d97bc12b | 22049 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22050 | } |
22051 | } | |
22052 | ||
f9aca02d | 22053 | static void |
d97bc12b | 22054 | dump_die_for_error (struct die_info *die) |
c906108c | 22055 | { |
d97bc12b DE |
22056 | dump_die_shallow (gdb_stderr, 0, die); |
22057 | } | |
22058 | ||
22059 | static void | |
22060 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22061 | { | |
22062 | int indent = level * 4; | |
22063 | ||
22064 | gdb_assert (die != NULL); | |
22065 | ||
22066 | if (level >= max_level) | |
22067 | return; | |
22068 | ||
22069 | dump_die_shallow (f, indent, die); | |
22070 | ||
22071 | if (die->child != NULL) | |
c906108c | 22072 | { |
d97bc12b DE |
22073 | print_spaces (indent, f); |
22074 | fprintf_unfiltered (f, " Children:"); | |
22075 | if (level + 1 < max_level) | |
22076 | { | |
22077 | fprintf_unfiltered (f, "\n"); | |
22078 | dump_die_1 (f, level + 1, max_level, die->child); | |
22079 | } | |
22080 | else | |
22081 | { | |
3e43a32a MS |
22082 | fprintf_unfiltered (f, |
22083 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22084 | } |
22085 | } | |
22086 | ||
22087 | if (die->sibling != NULL && level > 0) | |
22088 | { | |
22089 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22090 | } |
22091 | } | |
22092 | ||
d97bc12b DE |
22093 | /* This is called from the pdie macro in gdbinit.in. |
22094 | It's not static so gcc will keep a copy callable from gdb. */ | |
22095 | ||
22096 | void | |
22097 | dump_die (struct die_info *die, int max_level) | |
22098 | { | |
22099 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22100 | } | |
22101 | ||
f9aca02d | 22102 | static void |
51545339 | 22103 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22104 | { |
51545339 | 22105 | void **slot; |
c906108c | 22106 | |
9c541725 PA |
22107 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22108 | to_underlying (die->sect_off), | |
b64f50a1 | 22109 | INSERT); |
51545339 DJ |
22110 | |
22111 | *slot = die; | |
c906108c SS |
22112 | } |
22113 | ||
b64f50a1 JK |
22114 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
22115 | required kind. */ | |
22116 | ||
22117 | static sect_offset | |
ff39bb5e | 22118 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 22119 | { |
cd6c91b4 | 22120 | if (attr->form_is_ref ()) |
9c541725 | 22121 | return (sect_offset) DW_UNSND (attr); |
93311388 | 22122 | |
b98664d3 | 22123 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 22124 | dwarf_form_name (attr->form)); |
9c541725 | 22125 | return {}; |
c906108c SS |
22126 | } |
22127 | ||
43bbcdc2 PH |
22128 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
22129 | * the value held by the attribute is not constant. */ | |
a02abb62 | 22130 | |
43bbcdc2 | 22131 | static LONGEST |
ff39bb5e | 22132 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 22133 | { |
663c44ac | 22134 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
22135 | return DW_SND (attr); |
22136 | else if (attr->form == DW_FORM_udata | |
22137 | || attr->form == DW_FORM_data1 | |
22138 | || attr->form == DW_FORM_data2 | |
22139 | || attr->form == DW_FORM_data4 | |
22140 | || attr->form == DW_FORM_data8) | |
22141 | return DW_UNSND (attr); | |
22142 | else | |
22143 | { | |
cd6c91b4 | 22144 | /* For DW_FORM_data16 see attribute::form_is_constant. */ |
b98664d3 | 22145 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
22146 | dwarf_form_name (attr->form)); |
22147 | return default_value; | |
22148 | } | |
22149 | } | |
22150 | ||
348e048f DE |
22151 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22152 | On entry *REF_CU is the CU of SRC_DIE. | |
22153 | On exit *REF_CU is the CU of the result. */ | |
22154 | ||
22155 | static struct die_info * | |
ff39bb5e | 22156 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22157 | struct dwarf2_cu **ref_cu) |
22158 | { | |
22159 | struct die_info *die; | |
22160 | ||
cd6c91b4 | 22161 | if (attr->form_is_ref ()) |
348e048f | 22162 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22163 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22164 | die = follow_die_sig (src_die, attr, ref_cu); |
22165 | else | |
22166 | { | |
22167 | dump_die_for_error (src_die); | |
22168 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 22169 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
22170 | } |
22171 | ||
22172 | return die; | |
03dd20cc DJ |
22173 | } |
22174 | ||
5c631832 | 22175 | /* Follow reference OFFSET. |
673bfd45 DE |
22176 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22177 | On exit *REF_CU is the CU of the result. | |
22178 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22179 | |
f9aca02d | 22180 | static struct die_info * |
9c541725 | 22181 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22182 | struct dwarf2_cu **ref_cu) |
c906108c | 22183 | { |
10b3939b | 22184 | struct die_info temp_die; |
f2f0e013 | 22185 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
22186 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22187 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 22188 | |
348e048f DE |
22189 | gdb_assert (cu->per_cu != NULL); |
22190 | ||
98bfdba5 PA |
22191 | target_cu = cu; |
22192 | ||
3019eac3 | 22193 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22194 | { |
22195 | /* .debug_types CUs cannot reference anything outside their CU. | |
22196 | If they need to, they have to reference a signatured type via | |
55f1336d | 22197 | DW_FORM_ref_sig8. */ |
4057dfde | 22198 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 22199 | return NULL; |
348e048f | 22200 | } |
36586728 | 22201 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 22202 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
22203 | { |
22204 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22205 | |
9c541725 | 22206 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 22207 | dwarf2_per_objfile); |
03dd20cc DJ |
22208 | |
22209 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 22210 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 22211 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 22212 | |
10b3939b DJ |
22213 | target_cu = per_cu->cu; |
22214 | } | |
98bfdba5 PA |
22215 | else if (cu->dies == NULL) |
22216 | { | |
22217 | /* We're loading full DIEs during partial symbol reading. */ | |
22218 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 22219 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 22220 | } |
c906108c | 22221 | |
f2f0e013 | 22222 | *ref_cu = target_cu; |
9c541725 | 22223 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
22224 | |
22225 | if (target_cu != cu) | |
22226 | target_cu->ancestor = cu; | |
22227 | ||
9a3c8263 | 22228 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22229 | &temp_die, |
22230 | to_underlying (sect_off)); | |
5c631832 | 22231 | } |
10b3939b | 22232 | |
5c631832 JK |
22233 | /* Follow reference attribute ATTR of SRC_DIE. |
22234 | On entry *REF_CU is the CU of SRC_DIE. | |
22235 | On exit *REF_CU is the CU of the result. */ | |
22236 | ||
22237 | static struct die_info * | |
ff39bb5e | 22238 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22239 | struct dwarf2_cu **ref_cu) |
22240 | { | |
9c541725 | 22241 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
22242 | struct dwarf2_cu *cu = *ref_cu; |
22243 | struct die_info *die; | |
22244 | ||
9c541725 | 22245 | die = follow_die_offset (sect_off, |
36586728 TT |
22246 | (attr->form == DW_FORM_GNU_ref_alt |
22247 | || cu->per_cu->is_dwz), | |
22248 | ref_cu); | |
5c631832 | 22249 | if (!die) |
9d8780f0 SM |
22250 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
22251 | "at %s [in module %s]"), | |
22252 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 22253 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 22254 | |
5c631832 JK |
22255 | return die; |
22256 | } | |
22257 | ||
d4c9a4f8 | 22258 | /* See read.h. */ |
5c631832 JK |
22259 | |
22260 | struct dwarf2_locexpr_baton | |
9c541725 | 22261 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22262 | dwarf2_per_cu_data *per_cu, |
8b9737bf | 22263 | CORE_ADDR (*get_frame_pc) (void *baton), |
e4a62c65 | 22264 | void *baton, bool resolve_abstract_p) |
5c631832 | 22265 | { |
918dd910 | 22266 | struct dwarf2_cu *cu; |
5c631832 JK |
22267 | struct die_info *die; |
22268 | struct attribute *attr; | |
22269 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
22270 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
22271 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 22272 | |
918dd910 | 22273 | if (per_cu->cu == NULL) |
58f0c718 | 22274 | load_cu (per_cu, false); |
918dd910 | 22275 | cu = per_cu->cu; |
cc12ce38 DE |
22276 | if (cu == NULL) |
22277 | { | |
22278 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22279 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22280 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22281 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22282 | } |
918dd910 | 22283 | |
9c541725 | 22284 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 22285 | if (!die) |
9d8780f0 SM |
22286 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22287 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
22288 | |
22289 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 22290 | if (!attr && resolve_abstract_p |
3360b6e7 | 22291 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
22292 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
22293 | { | |
22294 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
b3b3bada | 22295 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
eba4caf2 | 22296 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
e4a62c65 | 22297 | |
3360b6e7 TV |
22298 | for (const auto &cand_off |
22299 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 22300 | { |
3360b6e7 TV |
22301 | struct dwarf2_cu *cand_cu = cu; |
22302 | struct die_info *cand | |
22303 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
22304 | if (!cand | |
22305 | || !cand->parent | |
e4a62c65 TV |
22306 | || cand->parent->tag != DW_TAG_subprogram) |
22307 | continue; | |
22308 | ||
22309 | CORE_ADDR pc_low, pc_high; | |
22310 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
22311 | if (pc_low == ((CORE_ADDR) -1)) |
22312 | continue; | |
22313 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
22314 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
22315 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
22316 | continue; |
22317 | ||
22318 | die = cand; | |
22319 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22320 | break; | |
22321 | } | |
22322 | } | |
22323 | ||
5c631832 JK |
22324 | if (!attr) |
22325 | { | |
e103e986 JK |
22326 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22327 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22328 | |
e103e986 | 22329 | retval.data = NULL; |
5c631832 JK |
22330 | retval.size = 0; |
22331 | } | |
cd6c91b4 | 22332 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
22333 | { |
22334 | struct dwarf2_loclist_baton loclist_baton; | |
22335 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22336 | size_t size; | |
22337 | ||
22338 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22339 | ||
22340 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22341 | &size, pc); | |
22342 | retval.size = size; | |
22343 | } | |
5c631832 JK |
22344 | else |
22345 | { | |
4fc6c0d5 | 22346 | if (!attr->form_is_block ()) |
9d8780f0 | 22347 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 22348 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 22349 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
22350 | |
22351 | retval.data = DW_BLOCK (attr)->data; | |
22352 | retval.size = DW_BLOCK (attr)->size; | |
22353 | } | |
22354 | retval.per_cu = cu->per_cu; | |
918dd910 | 22355 | |
ed2dc618 | 22356 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 22357 | |
5c631832 | 22358 | return retval; |
348e048f DE |
22359 | } |
22360 | ||
d4c9a4f8 | 22361 | /* See read.h. */ |
8b9737bf TT |
22362 | |
22363 | struct dwarf2_locexpr_baton | |
22364 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 22365 | dwarf2_per_cu_data *per_cu, |
8b9737bf TT |
22366 | CORE_ADDR (*get_frame_pc) (void *baton), |
22367 | void *baton) | |
22368 | { | |
9c541725 | 22369 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22370 | |
9c541725 | 22371 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22372 | } |
22373 | ||
b6807d98 TT |
22374 | /* Write a constant of a given type as target-ordered bytes into |
22375 | OBSTACK. */ | |
22376 | ||
22377 | static const gdb_byte * | |
22378 | write_constant_as_bytes (struct obstack *obstack, | |
22379 | enum bfd_endian byte_order, | |
22380 | struct type *type, | |
22381 | ULONGEST value, | |
22382 | LONGEST *len) | |
22383 | { | |
22384 | gdb_byte *result; | |
22385 | ||
22386 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22387 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22388 | store_unsigned_integer (result, *len, byte_order, value); |
22389 | ||
22390 | return result; | |
22391 | } | |
22392 | ||
d4c9a4f8 | 22393 | /* See read.h. */ |
b6807d98 TT |
22394 | |
22395 | const gdb_byte * | |
9c541725 | 22396 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 SM |
22397 | dwarf2_per_cu_data *per_cu, |
22398 | obstack *obstack, | |
b6807d98 TT |
22399 | LONGEST *len) |
22400 | { | |
22401 | struct dwarf2_cu *cu; | |
22402 | struct die_info *die; | |
22403 | struct attribute *attr; | |
22404 | const gdb_byte *result = NULL; | |
22405 | struct type *type; | |
22406 | LONGEST value; | |
22407 | enum bfd_endian byte_order; | |
e3b94546 | 22408 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 22409 | |
b6807d98 | 22410 | if (per_cu->cu == NULL) |
58f0c718 | 22411 | load_cu (per_cu, false); |
b6807d98 | 22412 | cu = per_cu->cu; |
cc12ce38 DE |
22413 | if (cu == NULL) |
22414 | { | |
22415 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22416 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22417 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22418 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22419 | } |
b6807d98 | 22420 | |
9c541725 | 22421 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 22422 | if (!die) |
9d8780f0 SM |
22423 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22424 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
22425 | |
22426 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
22427 | if (attr == NULL) | |
22428 | return NULL; | |
22429 | ||
e3b94546 | 22430 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
22431 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
22432 | ||
22433 | switch (attr->form) | |
22434 | { | |
22435 | case DW_FORM_addr: | |
336d760d | 22436 | case DW_FORM_addrx: |
b6807d98 TT |
22437 | case DW_FORM_GNU_addr_index: |
22438 | { | |
22439 | gdb_byte *tem; | |
22440 | ||
22441 | *len = cu->header.addr_size; | |
224c3ddb | 22442 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22443 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
22444 | result = tem; | |
22445 | } | |
22446 | break; | |
22447 | case DW_FORM_string: | |
22448 | case DW_FORM_strp: | |
cf532bd1 | 22449 | case DW_FORM_strx: |
b6807d98 TT |
22450 | case DW_FORM_GNU_str_index: |
22451 | case DW_FORM_GNU_strp_alt: | |
22452 | /* DW_STRING is already allocated on the objfile obstack, point | |
22453 | directly to it. */ | |
22454 | result = (const gdb_byte *) DW_STRING (attr); | |
22455 | *len = strlen (DW_STRING (attr)); | |
22456 | break; | |
22457 | case DW_FORM_block1: | |
22458 | case DW_FORM_block2: | |
22459 | case DW_FORM_block4: | |
22460 | case DW_FORM_block: | |
22461 | case DW_FORM_exprloc: | |
0224619f | 22462 | case DW_FORM_data16: |
b6807d98 TT |
22463 | result = DW_BLOCK (attr)->data; |
22464 | *len = DW_BLOCK (attr)->size; | |
22465 | break; | |
22466 | ||
22467 | /* The DW_AT_const_value attributes are supposed to carry the | |
22468 | symbol's value "represented as it would be on the target | |
22469 | architecture." By the time we get here, it's already been | |
22470 | converted to host endianness, so we just need to sign- or | |
22471 | zero-extend it as appropriate. */ | |
22472 | case DW_FORM_data1: | |
22473 | type = die_type (die, cu); | |
22474 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
22475 | if (result == NULL) | |
22476 | result = write_constant_as_bytes (obstack, byte_order, | |
22477 | type, value, len); | |
22478 | break; | |
22479 | case DW_FORM_data2: | |
22480 | type = die_type (die, cu); | |
22481 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
22482 | if (result == NULL) | |
22483 | result = write_constant_as_bytes (obstack, byte_order, | |
22484 | type, value, len); | |
22485 | break; | |
22486 | case DW_FORM_data4: | |
22487 | type = die_type (die, cu); | |
22488 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
22489 | if (result == NULL) | |
22490 | result = write_constant_as_bytes (obstack, byte_order, | |
22491 | type, value, len); | |
22492 | break; | |
22493 | case DW_FORM_data8: | |
22494 | type = die_type (die, cu); | |
22495 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
22496 | if (result == NULL) | |
22497 | result = write_constant_as_bytes (obstack, byte_order, | |
22498 | type, value, len); | |
22499 | break; | |
22500 | ||
22501 | case DW_FORM_sdata: | |
663c44ac | 22502 | case DW_FORM_implicit_const: |
b6807d98 TT |
22503 | type = die_type (die, cu); |
22504 | result = write_constant_as_bytes (obstack, byte_order, | |
22505 | type, DW_SND (attr), len); | |
22506 | break; | |
22507 | ||
22508 | case DW_FORM_udata: | |
22509 | type = die_type (die, cu); | |
22510 | result = write_constant_as_bytes (obstack, byte_order, | |
22511 | type, DW_UNSND (attr), len); | |
22512 | break; | |
22513 | ||
22514 | default: | |
b98664d3 | 22515 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
22516 | dwarf_form_name (attr->form)); |
22517 | break; | |
22518 | } | |
22519 | ||
22520 | return result; | |
22521 | } | |
22522 | ||
d4c9a4f8 | 22523 | /* See read.h. */ |
7942e96e AA |
22524 | |
22525 | struct type * | |
9c541725 | 22526 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22527 | dwarf2_per_cu_data *per_cu) |
7942e96e AA |
22528 | { |
22529 | struct dwarf2_cu *cu; | |
22530 | struct die_info *die; | |
22531 | ||
7942e96e | 22532 | if (per_cu->cu == NULL) |
58f0c718 | 22533 | load_cu (per_cu, false); |
7942e96e AA |
22534 | cu = per_cu->cu; |
22535 | if (!cu) | |
22536 | return NULL; | |
22537 | ||
9c541725 | 22538 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
22539 | if (!die) |
22540 | return NULL; | |
22541 | ||
22542 | return die_type (die, cu); | |
22543 | } | |
22544 | ||
8cb5117c | 22545 | /* See read.h. */ |
8a9b8146 TT |
22546 | |
22547 | struct type * | |
b64f50a1 | 22548 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
22549 | struct dwarf2_per_cu_data *per_cu) |
22550 | { | |
9c541725 | 22551 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 22552 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
22553 | } |
22554 | ||
ac9ec31b | 22555 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 22556 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
22557 | On exit *REF_CU is the CU of the result. |
22558 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
22559 | |
22560 | static struct die_info * | |
ac9ec31b DE |
22561 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
22562 | struct dwarf2_cu **ref_cu) | |
348e048f | 22563 | { |
348e048f | 22564 | struct die_info temp_die; |
c24bdb02 | 22565 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
22566 | struct die_info *die; |
22567 | ||
ac9ec31b DE |
22568 | /* While it might be nice to assert sig_type->type == NULL here, |
22569 | we can get here for DW_AT_imported_declaration where we need | |
22570 | the DIE not the type. */ | |
348e048f DE |
22571 | |
22572 | /* If necessary, add it to the queue and load its DIEs. */ | |
22573 | ||
95554aad | 22574 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 22575 | read_signatured_type (sig_type); |
348e048f | 22576 | |
348e048f | 22577 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 22578 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
22579 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
22580 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 22581 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 22582 | to_underlying (temp_die.sect_off)); |
348e048f DE |
22583 | if (die) |
22584 | { | |
ed2dc618 | 22585 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 22586 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 22587 | |
796a7ff8 DE |
22588 | /* For .gdb_index version 7 keep track of included TUs. |
22589 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
22590 | if (dwarf2_per_objfile->index_table != NULL | |
22591 | && dwarf2_per_objfile->index_table->version <= 7) | |
22592 | { | |
ae640021 | 22593 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
22594 | } |
22595 | ||
348e048f | 22596 | *ref_cu = sig_cu; |
c24bdb02 KS |
22597 | if (sig_cu != cu) |
22598 | sig_cu->ancestor = cu; | |
22599 | ||
348e048f DE |
22600 | return die; |
22601 | } | |
22602 | ||
ac9ec31b DE |
22603 | return NULL; |
22604 | } | |
22605 | ||
22606 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
22607 | On entry *REF_CU is the CU of SRC_DIE. | |
22608 | On exit *REF_CU is the CU of the result. | |
22609 | The result is the DIE of the type. | |
22610 | If the referenced type cannot be found an error is thrown. */ | |
22611 | ||
22612 | static struct die_info * | |
ff39bb5e | 22613 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
22614 | struct dwarf2_cu **ref_cu) |
22615 | { | |
22616 | ULONGEST signature = DW_SIGNATURE (attr); | |
22617 | struct signatured_type *sig_type; | |
22618 | struct die_info *die; | |
22619 | ||
22620 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
22621 | ||
a2ce51a0 | 22622 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
22623 | /* sig_type will be NULL if the signatured type is missing from |
22624 | the debug info. */ | |
22625 | if (sig_type == NULL) | |
22626 | { | |
22627 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
22628 | " from DIE at %s [in module %s]"), |
22629 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22630 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22631 | } |
22632 | ||
22633 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
22634 | if (die == NULL) | |
22635 | { | |
22636 | dump_die_for_error (src_die); | |
22637 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
22638 | " from DIE at %s [in module %s]"), |
22639 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22640 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22641 | } |
22642 | ||
22643 | return die; | |
22644 | } | |
22645 | ||
22646 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
22647 | reading in and processing the type unit if necessary. */ | |
22648 | ||
22649 | static struct type * | |
22650 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
22651 | struct dwarf2_cu *cu) | |
22652 | { | |
518817b3 SM |
22653 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22654 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
22655 | struct signatured_type *sig_type; |
22656 | struct dwarf2_cu *type_cu; | |
22657 | struct die_info *type_die; | |
22658 | struct type *type; | |
22659 | ||
a2ce51a0 | 22660 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
22661 | /* sig_type will be NULL if the signatured type is missing from |
22662 | the debug info. */ | |
22663 | if (sig_type == NULL) | |
22664 | { | |
b98664d3 | 22665 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
22666 | " from DIE at %s [in module %s]"), |
22667 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22668 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22669 | return build_error_marker_type (cu, die); |
22670 | } | |
22671 | ||
22672 | /* If we already know the type we're done. */ | |
22673 | if (sig_type->type != NULL) | |
22674 | return sig_type->type; | |
22675 | ||
22676 | type_cu = cu; | |
22677 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22678 | if (type_die != NULL) | |
22679 | { | |
22680 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22681 | is created. This is important, for example, because for c++ classes | |
22682 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22683 | type = read_type_die (type_die, type_cu); | |
22684 | if (type == NULL) | |
22685 | { | |
b98664d3 | 22686 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
22687 | " referenced from DIE at %s [in module %s]"), |
22688 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22689 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22690 | type = build_error_marker_type (cu, die); |
22691 | } | |
22692 | } | |
22693 | else | |
22694 | { | |
b98664d3 | 22695 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
22696 | " from DIE at %s [in module %s]"), |
22697 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22698 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22699 | type = build_error_marker_type (cu, die); |
22700 | } | |
22701 | sig_type->type = type; | |
22702 | ||
22703 | return type; | |
22704 | } | |
22705 | ||
22706 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22707 | reading in and processing the type unit if necessary. */ | |
22708 | ||
22709 | static struct type * | |
ff39bb5e | 22710 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22711 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22712 | { |
22713 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 22714 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22715 | { |
22716 | struct dwarf2_cu *type_cu = cu; | |
22717 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22718 | ||
22719 | return read_type_die (type_die, type_cu); | |
22720 | } | |
22721 | else if (attr->form == DW_FORM_ref_sig8) | |
22722 | { | |
22723 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22724 | } | |
22725 | else | |
22726 | { | |
518817b3 SM |
22727 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22728 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22729 | |
b98664d3 | 22730 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
22731 | " at %s [in module %s]"), |
22732 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 22733 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22734 | return build_error_marker_type (cu, die); |
22735 | } | |
348e048f DE |
22736 | } |
22737 | ||
e5fe5e75 | 22738 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22739 | |
22740 | static void | |
e5fe5e75 | 22741 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22742 | { |
52dc124a | 22743 | struct signatured_type *sig_type; |
348e048f | 22744 | |
f4dc4d17 | 22745 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 22746 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 22747 | |
6721b2ec DE |
22748 | /* We have the per_cu, but we need the signatured_type. |
22749 | Fortunately this is an easy translation. */ | |
22750 | gdb_assert (per_cu->is_debug_types); | |
22751 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22752 | |
6721b2ec | 22753 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22754 | |
52dc124a | 22755 | read_signatured_type (sig_type); |
348e048f | 22756 | |
6721b2ec | 22757 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22758 | } |
22759 | ||
3019eac3 DE |
22760 | /* Read in a signatured type and build its CU and DIEs. |
22761 | If the type is a stub for the real type in a DWO file, | |
22762 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22763 | |
22764 | static void | |
22765 | read_signatured_type (struct signatured_type *sig_type) | |
22766 | { | |
22767 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22768 | |
3019eac3 | 22769 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22770 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22771 | |
6751ebae | 22772 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
22773 | |
22774 | if (!reader.dummy_p) | |
22775 | { | |
22776 | struct dwarf2_cu *cu = reader.cu; | |
22777 | const gdb_byte *info_ptr = reader.info_ptr; | |
22778 | ||
22779 | gdb_assert (cu->die_hash == NULL); | |
22780 | cu->die_hash = | |
22781 | htab_create_alloc_ex (cu->header.length / 12, | |
22782 | die_hash, | |
22783 | die_eq, | |
22784 | NULL, | |
22785 | &cu->comp_unit_obstack, | |
22786 | hashtab_obstack_allocate, | |
22787 | dummy_obstack_deallocate); | |
22788 | ||
3e225074 | 22789 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
22790 | reader.comp_unit_die->child |
22791 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
22792 | reader.comp_unit_die); | |
22793 | cu->dies = reader.comp_unit_die; | |
22794 | /* comp_unit_die is not stored in die_hash, no need. */ | |
22795 | ||
22796 | /* We try not to read any attributes in this function, because | |
22797 | not all CUs needed for references have been loaded yet, and | |
22798 | symbol table processing isn't initialized. But we have to | |
22799 | set the CU language, or we won't be able to build types | |
22800 | correctly. Similarly, if we do not read the producer, we can | |
22801 | not apply producer-specific interpretation. */ | |
22802 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
22803 | |
22804 | reader.keep (); | |
c0ab21c2 TT |
22805 | } |
22806 | ||
7ee85ab1 | 22807 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22808 | } |
22809 | ||
c906108c SS |
22810 | /* Decode simple location descriptions. |
22811 | Given a pointer to a dwarf block that defines a location, compute | |
22812 | the location and return the value. | |
22813 | ||
4cecd739 DJ |
22814 | NOTE drow/2003-11-18: This function is called in two situations |
22815 | now: for the address of static or global variables (partial symbols | |
22816 | only) and for offsets into structures which are expected to be | |
22817 | (more or less) constant. The partial symbol case should go away, | |
22818 | and only the constant case should remain. That will let this | |
22819 | function complain more accurately. A few special modes are allowed | |
22820 | without complaint for global variables (for instance, global | |
22821 | register values and thread-local values). | |
c906108c SS |
22822 | |
22823 | A location description containing no operations indicates that the | |
4cecd739 | 22824 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22825 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22826 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22827 | complaint. |
22828 | ||
22829 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22830 | |
22831 | static CORE_ADDR | |
e7c27a73 | 22832 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22833 | { |
518817b3 | 22834 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
22835 | size_t i; |
22836 | size_t size = blk->size; | |
d521ce57 | 22837 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22838 | CORE_ADDR stack[64]; |
22839 | int stacki; | |
22840 | unsigned int bytes_read, unsnd; | |
22841 | gdb_byte op; | |
c906108c | 22842 | |
21ae7a4d JK |
22843 | i = 0; |
22844 | stacki = 0; | |
22845 | stack[stacki] = 0; | |
22846 | stack[++stacki] = 0; | |
22847 | ||
22848 | while (i < size) | |
22849 | { | |
22850 | op = data[i++]; | |
22851 | switch (op) | |
22852 | { | |
22853 | case DW_OP_lit0: | |
22854 | case DW_OP_lit1: | |
22855 | case DW_OP_lit2: | |
22856 | case DW_OP_lit3: | |
22857 | case DW_OP_lit4: | |
22858 | case DW_OP_lit5: | |
22859 | case DW_OP_lit6: | |
22860 | case DW_OP_lit7: | |
22861 | case DW_OP_lit8: | |
22862 | case DW_OP_lit9: | |
22863 | case DW_OP_lit10: | |
22864 | case DW_OP_lit11: | |
22865 | case DW_OP_lit12: | |
22866 | case DW_OP_lit13: | |
22867 | case DW_OP_lit14: | |
22868 | case DW_OP_lit15: | |
22869 | case DW_OP_lit16: | |
22870 | case DW_OP_lit17: | |
22871 | case DW_OP_lit18: | |
22872 | case DW_OP_lit19: | |
22873 | case DW_OP_lit20: | |
22874 | case DW_OP_lit21: | |
22875 | case DW_OP_lit22: | |
22876 | case DW_OP_lit23: | |
22877 | case DW_OP_lit24: | |
22878 | case DW_OP_lit25: | |
22879 | case DW_OP_lit26: | |
22880 | case DW_OP_lit27: | |
22881 | case DW_OP_lit28: | |
22882 | case DW_OP_lit29: | |
22883 | case DW_OP_lit30: | |
22884 | case DW_OP_lit31: | |
22885 | stack[++stacki] = op - DW_OP_lit0; | |
22886 | break; | |
f1bea926 | 22887 | |
21ae7a4d JK |
22888 | case DW_OP_reg0: |
22889 | case DW_OP_reg1: | |
22890 | case DW_OP_reg2: | |
22891 | case DW_OP_reg3: | |
22892 | case DW_OP_reg4: | |
22893 | case DW_OP_reg5: | |
22894 | case DW_OP_reg6: | |
22895 | case DW_OP_reg7: | |
22896 | case DW_OP_reg8: | |
22897 | case DW_OP_reg9: | |
22898 | case DW_OP_reg10: | |
22899 | case DW_OP_reg11: | |
22900 | case DW_OP_reg12: | |
22901 | case DW_OP_reg13: | |
22902 | case DW_OP_reg14: | |
22903 | case DW_OP_reg15: | |
22904 | case DW_OP_reg16: | |
22905 | case DW_OP_reg17: | |
22906 | case DW_OP_reg18: | |
22907 | case DW_OP_reg19: | |
22908 | case DW_OP_reg20: | |
22909 | case DW_OP_reg21: | |
22910 | case DW_OP_reg22: | |
22911 | case DW_OP_reg23: | |
22912 | case DW_OP_reg24: | |
22913 | case DW_OP_reg25: | |
22914 | case DW_OP_reg26: | |
22915 | case DW_OP_reg27: | |
22916 | case DW_OP_reg28: | |
22917 | case DW_OP_reg29: | |
22918 | case DW_OP_reg30: | |
22919 | case DW_OP_reg31: | |
22920 | stack[++stacki] = op - DW_OP_reg0; | |
22921 | if (i < size) | |
22922 | dwarf2_complex_location_expr_complaint (); | |
22923 | break; | |
c906108c | 22924 | |
21ae7a4d JK |
22925 | case DW_OP_regx: |
22926 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22927 | i += bytes_read; | |
22928 | stack[++stacki] = unsnd; | |
22929 | if (i < size) | |
22930 | dwarf2_complex_location_expr_complaint (); | |
22931 | break; | |
c906108c | 22932 | |
21ae7a4d | 22933 | case DW_OP_addr: |
c8a7a66f TT |
22934 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
22935 | &bytes_read); | |
21ae7a4d JK |
22936 | i += bytes_read; |
22937 | break; | |
d53d4ac5 | 22938 | |
21ae7a4d JK |
22939 | case DW_OP_const1u: |
22940 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22941 | i += 1; | |
22942 | break; | |
22943 | ||
22944 | case DW_OP_const1s: | |
22945 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22946 | i += 1; | |
22947 | break; | |
22948 | ||
22949 | case DW_OP_const2u: | |
22950 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22951 | i += 2; | |
22952 | break; | |
22953 | ||
22954 | case DW_OP_const2s: | |
22955 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22956 | i += 2; | |
22957 | break; | |
d53d4ac5 | 22958 | |
21ae7a4d JK |
22959 | case DW_OP_const4u: |
22960 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22961 | i += 4; | |
22962 | break; | |
22963 | ||
22964 | case DW_OP_const4s: | |
22965 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22966 | i += 4; | |
22967 | break; | |
22968 | ||
585861ea JK |
22969 | case DW_OP_const8u: |
22970 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22971 | i += 8; | |
22972 | break; | |
22973 | ||
21ae7a4d JK |
22974 | case DW_OP_constu: |
22975 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22976 | &bytes_read); | |
22977 | i += bytes_read; | |
22978 | break; | |
22979 | ||
22980 | case DW_OP_consts: | |
22981 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22982 | i += bytes_read; | |
22983 | break; | |
22984 | ||
22985 | case DW_OP_dup: | |
22986 | stack[stacki + 1] = stack[stacki]; | |
22987 | stacki++; | |
22988 | break; | |
22989 | ||
22990 | case DW_OP_plus: | |
22991 | stack[stacki - 1] += stack[stacki]; | |
22992 | stacki--; | |
22993 | break; | |
22994 | ||
22995 | case DW_OP_plus_uconst: | |
22996 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22997 | &bytes_read); | |
22998 | i += bytes_read; | |
22999 | break; | |
23000 | ||
23001 | case DW_OP_minus: | |
23002 | stack[stacki - 1] -= stack[stacki]; | |
23003 | stacki--; | |
23004 | break; | |
23005 | ||
23006 | case DW_OP_deref: | |
23007 | /* If we're not the last op, then we definitely can't encode | |
23008 | this using GDB's address_class enum. This is valid for partial | |
23009 | global symbols, although the variable's address will be bogus | |
23010 | in the psymtab. */ | |
23011 | if (i < size) | |
23012 | dwarf2_complex_location_expr_complaint (); | |
23013 | break; | |
23014 | ||
23015 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 23016 | case DW_OP_form_tls_address: |
21ae7a4d JK |
23017 | /* The top of the stack has the offset from the beginning |
23018 | of the thread control block at which the variable is located. */ | |
23019 | /* Nothing should follow this operator, so the top of stack would | |
23020 | be returned. */ | |
23021 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23022 | address will be bogus in the psymtab. Make it always at least |
23023 | non-zero to not look as a variable garbage collected by linker | |
23024 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
23025 | if (i < size) |
23026 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 23027 | stack[stacki]++; |
21ae7a4d JK |
23028 | break; |
23029 | ||
23030 | case DW_OP_GNU_uninit: | |
23031 | break; | |
23032 | ||
336d760d | 23033 | case DW_OP_addrx: |
3019eac3 | 23034 | case DW_OP_GNU_addr_index: |
49f6c839 | 23035 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23036 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23037 | &bytes_read); | |
23038 | i += bytes_read; | |
23039 | break; | |
23040 | ||
21ae7a4d JK |
23041 | default: |
23042 | { | |
f39c6ffd | 23043 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
23044 | |
23045 | if (name) | |
b98664d3 | 23046 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
23047 | name); |
23048 | else | |
b98664d3 | 23049 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
23050 | op); |
23051 | } | |
23052 | ||
23053 | return (stack[stacki]); | |
d53d4ac5 | 23054 | } |
3c6e0cb3 | 23055 | |
21ae7a4d JK |
23056 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
23057 | outside of the allocated space. Also enforce minimum>0. */ | |
23058 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
23059 | { | |
b98664d3 | 23060 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
23061 | return 0; |
23062 | } | |
23063 | ||
23064 | if (stacki <= 0) | |
23065 | { | |
b98664d3 | 23066 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
23067 | return 0; |
23068 | } | |
23069 | } | |
23070 | return (stack[stacki]); | |
c906108c SS |
23071 | } |
23072 | ||
23073 | /* memory allocation interface */ | |
23074 | ||
c906108c | 23075 | static struct dwarf_block * |
7b5a2f43 | 23076 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23077 | { |
8d749320 | 23078 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23079 | } |
23080 | ||
c906108c | 23081 | static struct die_info * |
b60c80d6 | 23082 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23083 | { |
23084 | struct die_info *die; | |
b60c80d6 DJ |
23085 | size_t size = sizeof (struct die_info); |
23086 | ||
23087 | if (num_attrs > 1) | |
23088 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23089 | |
b60c80d6 | 23090 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23091 | memset (die, 0, sizeof (struct die_info)); |
23092 | return (die); | |
23093 | } | |
2e276125 JB |
23094 | |
23095 | \f | |
23096 | /* Macro support. */ | |
23097 | ||
2e276125 | 23098 | static struct macro_source_file * |
804d2729 TT |
23099 | macro_start_file (struct dwarf2_cu *cu, |
23100 | int file, int line, | |
2e276125 | 23101 | struct macro_source_file *current_file, |
43f3e411 | 23102 | struct line_header *lh) |
2e276125 | 23103 | { |
233d95b5 | 23104 | /* File name relative to the compilation directory of this source file. */ |
03075812 | 23105 | gdb::unique_xmalloc_ptr<char> file_name = lh->file_file_name (file); |
2e276125 | 23106 | |
2e276125 | 23107 | if (! current_file) |
abc9d0dc | 23108 | { |
fc474241 DE |
23109 | /* Note: We don't create a macro table for this compilation unit |
23110 | at all until we actually get a filename. */ | |
c24bdb02 | 23111 | struct macro_table *macro_table = cu->get_builder ()->get_macro_table (); |
fc474241 | 23112 | |
abc9d0dc TT |
23113 | /* If we have no current file, then this must be the start_file |
23114 | directive for the compilation unit's main source file. */ | |
03075812 | 23115 | current_file = macro_set_main (macro_table, file_name.get ()); |
fc474241 | 23116 | macro_define_special (macro_table); |
abc9d0dc | 23117 | } |
2e276125 | 23118 | else |
03075812 | 23119 | current_file = macro_include (current_file, line, file_name.get ()); |
6e70227d | 23120 | |
2e276125 JB |
23121 | return current_file; |
23122 | } | |
23123 | ||
2e276125 JB |
23124 | static const char * |
23125 | consume_improper_spaces (const char *p, const char *body) | |
23126 | { | |
23127 | if (*p == ' ') | |
23128 | { | |
b98664d3 | 23129 | complaint (_("macro definition contains spaces " |
3e43a32a | 23130 | "in formal argument list:\n`%s'"), |
4d3c2250 | 23131 | body); |
2e276125 JB |
23132 | |
23133 | while (*p == ' ') | |
23134 | p++; | |
23135 | } | |
23136 | ||
23137 | return p; | |
23138 | } | |
23139 | ||
23140 | ||
23141 | static void | |
23142 | parse_macro_definition (struct macro_source_file *file, int line, | |
23143 | const char *body) | |
23144 | { | |
23145 | const char *p; | |
23146 | ||
23147 | /* The body string takes one of two forms. For object-like macro | |
23148 | definitions, it should be: | |
23149 | ||
23150 | <macro name> " " <definition> | |
23151 | ||
23152 | For function-like macro definitions, it should be: | |
23153 | ||
23154 | <macro name> "() " <definition> | |
23155 | or | |
23156 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
23157 | ||
23158 | Spaces may appear only where explicitly indicated, and in the | |
23159 | <definition>. | |
23160 | ||
23161 | The Dwarf 2 spec says that an object-like macro's name is always | |
23162 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 23163 | the space when the macro's definition is the empty string. |
2e276125 JB |
23164 | |
23165 | The Dwarf 2 spec says that there should be no spaces between the | |
23166 | formal arguments in a function-like macro's formal argument list, | |
23167 | but versions of GCC around March 2002 include spaces after the | |
23168 | commas. */ | |
23169 | ||
23170 | ||
23171 | /* Find the extent of the macro name. The macro name is terminated | |
23172 | by either a space or null character (for an object-like macro) or | |
23173 | an opening paren (for a function-like macro). */ | |
23174 | for (p = body; *p; p++) | |
23175 | if (*p == ' ' || *p == '(') | |
23176 | break; | |
23177 | ||
23178 | if (*p == ' ' || *p == '\0') | |
23179 | { | |
23180 | /* It's an object-like macro. */ | |
23181 | int name_len = p - body; | |
456e800a | 23182 | std::string name (body, name_len); |
2e276125 JB |
23183 | const char *replacement; |
23184 | ||
23185 | if (*p == ' ') | |
23186 | replacement = body + name_len + 1; | |
23187 | else | |
23188 | { | |
4d3c2250 | 23189 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23190 | replacement = body + name_len; |
23191 | } | |
6e70227d | 23192 | |
456e800a | 23193 | macro_define_object (file, line, name.c_str (), replacement); |
2e276125 JB |
23194 | } |
23195 | else if (*p == '(') | |
23196 | { | |
23197 | /* It's a function-like macro. */ | |
456e800a | 23198 | std::string name (body, p - body); |
2e276125 JB |
23199 | int argc = 0; |
23200 | int argv_size = 1; | |
8d749320 | 23201 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
23202 | |
23203 | p++; | |
23204 | ||
23205 | p = consume_improper_spaces (p, body); | |
23206 | ||
23207 | /* Parse the formal argument list. */ | |
23208 | while (*p && *p != ')') | |
23209 | { | |
23210 | /* Find the extent of the current argument name. */ | |
23211 | const char *arg_start = p; | |
23212 | ||
23213 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
23214 | p++; | |
23215 | ||
23216 | if (! *p || p == arg_start) | |
4d3c2250 | 23217 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23218 | else |
23219 | { | |
23220 | /* Make sure argv has room for the new argument. */ | |
23221 | if (argc >= argv_size) | |
23222 | { | |
23223 | argv_size *= 2; | |
224c3ddb | 23224 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
23225 | } |
23226 | ||
3f8a7804 | 23227 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
23228 | } |
23229 | ||
23230 | p = consume_improper_spaces (p, body); | |
23231 | ||
23232 | /* Consume the comma, if present. */ | |
23233 | if (*p == ',') | |
23234 | { | |
23235 | p++; | |
23236 | ||
23237 | p = consume_improper_spaces (p, body); | |
23238 | } | |
23239 | } | |
23240 | ||
23241 | if (*p == ')') | |
23242 | { | |
23243 | p++; | |
23244 | ||
23245 | if (*p == ' ') | |
23246 | /* Perfectly formed definition, no complaints. */ | |
456e800a | 23247 | macro_define_function (file, line, name.c_str (), |
6e70227d | 23248 | argc, (const char **) argv, |
2e276125 JB |
23249 | p + 1); |
23250 | else if (*p == '\0') | |
23251 | { | |
23252 | /* Complain, but do define it. */ | |
4d3c2250 | 23253 | dwarf2_macro_malformed_definition_complaint (body); |
456e800a | 23254 | macro_define_function (file, line, name.c_str (), |
6e70227d | 23255 | argc, (const char **) argv, |
2e276125 JB |
23256 | p); |
23257 | } | |
23258 | else | |
23259 | /* Just complain. */ | |
4d3c2250 | 23260 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23261 | } |
23262 | else | |
23263 | /* Just complain. */ | |
4d3c2250 | 23264 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 23265 | |
2e276125 JB |
23266 | { |
23267 | int i; | |
23268 | ||
23269 | for (i = 0; i < argc; i++) | |
23270 | xfree (argv[i]); | |
23271 | } | |
23272 | xfree (argv); | |
23273 | } | |
23274 | else | |
4d3c2250 | 23275 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23276 | } |
23277 | ||
cf2c3c16 TT |
23278 | /* Skip some bytes from BYTES according to the form given in FORM. |
23279 | Returns the new pointer. */ | |
2e276125 | 23280 | |
d521ce57 TT |
23281 | static const gdb_byte * |
23282 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
23283 | enum dwarf_form form, |
23284 | unsigned int offset_size, | |
23285 | struct dwarf2_section_info *section) | |
2e276125 | 23286 | { |
cf2c3c16 | 23287 | unsigned int bytes_read; |
2e276125 | 23288 | |
cf2c3c16 | 23289 | switch (form) |
2e276125 | 23290 | { |
cf2c3c16 TT |
23291 | case DW_FORM_data1: |
23292 | case DW_FORM_flag: | |
23293 | ++bytes; | |
23294 | break; | |
23295 | ||
23296 | case DW_FORM_data2: | |
23297 | bytes += 2; | |
23298 | break; | |
23299 | ||
23300 | case DW_FORM_data4: | |
23301 | bytes += 4; | |
23302 | break; | |
23303 | ||
23304 | case DW_FORM_data8: | |
23305 | bytes += 8; | |
23306 | break; | |
23307 | ||
0224619f JK |
23308 | case DW_FORM_data16: |
23309 | bytes += 16; | |
23310 | break; | |
23311 | ||
cf2c3c16 TT |
23312 | case DW_FORM_string: |
23313 | read_direct_string (abfd, bytes, &bytes_read); | |
23314 | bytes += bytes_read; | |
23315 | break; | |
23316 | ||
23317 | case DW_FORM_sec_offset: | |
23318 | case DW_FORM_strp: | |
36586728 | 23319 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
23320 | bytes += offset_size; |
23321 | break; | |
23322 | ||
23323 | case DW_FORM_block: | |
23324 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
23325 | bytes += bytes_read; | |
23326 | break; | |
23327 | ||
23328 | case DW_FORM_block1: | |
23329 | bytes += 1 + read_1_byte (abfd, bytes); | |
23330 | break; | |
23331 | case DW_FORM_block2: | |
23332 | bytes += 2 + read_2_bytes (abfd, bytes); | |
23333 | break; | |
23334 | case DW_FORM_block4: | |
23335 | bytes += 4 + read_4_bytes (abfd, bytes); | |
23336 | break; | |
23337 | ||
336d760d | 23338 | case DW_FORM_addrx: |
cf2c3c16 | 23339 | case DW_FORM_sdata: |
cf532bd1 | 23340 | case DW_FORM_strx: |
cf2c3c16 | 23341 | case DW_FORM_udata: |
3019eac3 DE |
23342 | case DW_FORM_GNU_addr_index: |
23343 | case DW_FORM_GNU_str_index: | |
d521ce57 | 23344 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
23345 | if (bytes == NULL) |
23346 | { | |
23347 | dwarf2_section_buffer_overflow_complaint (section); | |
23348 | return NULL; | |
23349 | } | |
cf2c3c16 TT |
23350 | break; |
23351 | ||
663c44ac JK |
23352 | case DW_FORM_implicit_const: |
23353 | break; | |
23354 | ||
cf2c3c16 TT |
23355 | default: |
23356 | { | |
b98664d3 | 23357 | complaint (_("invalid form 0x%x in `%s'"), |
96b79293 | 23358 | form, section->get_name ()); |
cf2c3c16 TT |
23359 | return NULL; |
23360 | } | |
2e276125 JB |
23361 | } |
23362 | ||
cf2c3c16 TT |
23363 | return bytes; |
23364 | } | |
757a13d0 | 23365 | |
cf2c3c16 TT |
23366 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
23367 | opcode. Returns an updated pointer to the macro data buffer; or, | |
23368 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 23369 | |
d521ce57 | 23370 | static const gdb_byte * |
cf2c3c16 | 23371 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
23372 | const gdb_byte **opcode_definitions, |
23373 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
23374 | bfd *abfd, |
23375 | unsigned int offset_size, | |
23376 | struct dwarf2_section_info *section) | |
23377 | { | |
23378 | unsigned int bytes_read, i; | |
23379 | unsigned long arg; | |
d521ce57 | 23380 | const gdb_byte *defn; |
2e276125 | 23381 | |
cf2c3c16 | 23382 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 23383 | { |
b98664d3 | 23384 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
23385 | opcode); |
23386 | return NULL; | |
23387 | } | |
2e276125 | 23388 | |
cf2c3c16 TT |
23389 | defn = opcode_definitions[opcode]; |
23390 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
23391 | defn += bytes_read; | |
2e276125 | 23392 | |
cf2c3c16 TT |
23393 | for (i = 0; i < arg; ++i) |
23394 | { | |
aead7601 SM |
23395 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
23396 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 23397 | section); |
cf2c3c16 TT |
23398 | if (mac_ptr == NULL) |
23399 | { | |
23400 | /* skip_form_bytes already issued the complaint. */ | |
23401 | return NULL; | |
23402 | } | |
23403 | } | |
757a13d0 | 23404 | |
cf2c3c16 TT |
23405 | return mac_ptr; |
23406 | } | |
757a13d0 | 23407 | |
cf2c3c16 TT |
23408 | /* A helper function which parses the header of a macro section. |
23409 | If the macro section is the extended (for now called "GNU") type, | |
23410 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
23411 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 23412 | |
d521ce57 TT |
23413 | static const gdb_byte * |
23414 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 23415 | bfd *abfd, |
d521ce57 | 23416 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
23417 | unsigned int *offset_size, |
23418 | int section_is_gnu) | |
23419 | { | |
23420 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 23421 | |
cf2c3c16 TT |
23422 | if (section_is_gnu) |
23423 | { | |
23424 | unsigned int version, flags; | |
757a13d0 | 23425 | |
cf2c3c16 | 23426 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 23427 | if (version != 4 && version != 5) |
cf2c3c16 | 23428 | { |
b98664d3 | 23429 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
23430 | version); |
23431 | return NULL; | |
23432 | } | |
23433 | mac_ptr += 2; | |
757a13d0 | 23434 | |
cf2c3c16 TT |
23435 | flags = read_1_byte (abfd, mac_ptr); |
23436 | ++mac_ptr; | |
23437 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 23438 | |
cf2c3c16 TT |
23439 | if ((flags & 2) != 0) |
23440 | /* We don't need the line table offset. */ | |
23441 | mac_ptr += *offset_size; | |
757a13d0 | 23442 | |
cf2c3c16 TT |
23443 | /* Vendor opcode descriptions. */ |
23444 | if ((flags & 4) != 0) | |
23445 | { | |
23446 | unsigned int i, count; | |
757a13d0 | 23447 | |
cf2c3c16 TT |
23448 | count = read_1_byte (abfd, mac_ptr); |
23449 | ++mac_ptr; | |
23450 | for (i = 0; i < count; ++i) | |
23451 | { | |
23452 | unsigned int opcode, bytes_read; | |
23453 | unsigned long arg; | |
23454 | ||
23455 | opcode = read_1_byte (abfd, mac_ptr); | |
23456 | ++mac_ptr; | |
23457 | opcode_definitions[opcode] = mac_ptr; | |
23458 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23459 | mac_ptr += bytes_read; | |
23460 | mac_ptr += arg; | |
23461 | } | |
757a13d0 | 23462 | } |
cf2c3c16 | 23463 | } |
757a13d0 | 23464 | |
cf2c3c16 TT |
23465 | return mac_ptr; |
23466 | } | |
757a13d0 | 23467 | |
cf2c3c16 | 23468 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 23469 | including DW_MACRO_import. */ |
cf2c3c16 TT |
23470 | |
23471 | static void | |
804d2729 | 23472 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 23473 | bfd *abfd, |
d521ce57 | 23474 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 23475 | struct macro_source_file *current_file, |
43f3e411 | 23476 | struct line_header *lh, |
cf2c3c16 | 23477 | struct dwarf2_section_info *section, |
36586728 | 23478 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 23479 | unsigned int offset_size, |
8fc3fc34 | 23480 | htab_t include_hash) |
cf2c3c16 | 23481 | { |
804d2729 TT |
23482 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23483 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 23484 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
23485 | enum dwarf_macro_record_type macinfo_type; |
23486 | int at_commandline; | |
d521ce57 | 23487 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 23488 | |
cf2c3c16 TT |
23489 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
23490 | &offset_size, section_is_gnu); | |
23491 | if (mac_ptr == NULL) | |
23492 | { | |
23493 | /* We already issued a complaint. */ | |
23494 | return; | |
23495 | } | |
757a13d0 JK |
23496 | |
23497 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
23498 | GDB is still reading the definitions from command line. First | |
23499 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
23500 | to create CURRENT_FILE for the main source holding also the command line | |
23501 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
23502 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
23503 | ||
23504 | at_commandline = 1; | |
23505 | ||
23506 | do | |
23507 | { | |
23508 | /* Do we at least have room for a macinfo type byte? */ | |
23509 | if (mac_ptr >= mac_end) | |
23510 | { | |
f664829e | 23511 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
23512 | break; |
23513 | } | |
23514 | ||
aead7601 | 23515 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
23516 | mac_ptr++; |
23517 | ||
cf2c3c16 TT |
23518 | /* Note that we rely on the fact that the corresponding GNU and |
23519 | DWARF constants are the same. */ | |
132448f8 SM |
23520 | DIAGNOSTIC_PUSH |
23521 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
23522 | switch (macinfo_type) |
23523 | { | |
23524 | /* A zero macinfo type indicates the end of the macro | |
23525 | information. */ | |
23526 | case 0: | |
23527 | break; | |
2e276125 | 23528 | |
0af92d60 JK |
23529 | case DW_MACRO_define: |
23530 | case DW_MACRO_undef: | |
23531 | case DW_MACRO_define_strp: | |
23532 | case DW_MACRO_undef_strp: | |
23533 | case DW_MACRO_define_sup: | |
23534 | case DW_MACRO_undef_sup: | |
2e276125 | 23535 | { |
891d2f0b | 23536 | unsigned int bytes_read; |
2e276125 | 23537 | int line; |
d521ce57 | 23538 | const char *body; |
cf2c3c16 | 23539 | int is_define; |
2e276125 | 23540 | |
cf2c3c16 TT |
23541 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
23542 | mac_ptr += bytes_read; | |
23543 | ||
0af92d60 JK |
23544 | if (macinfo_type == DW_MACRO_define |
23545 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
23546 | { |
23547 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
23548 | mac_ptr += bytes_read; | |
23549 | } | |
23550 | else | |
23551 | { | |
23552 | LONGEST str_offset; | |
23553 | ||
24aa364d | 23554 | str_offset = read_offset (abfd, mac_ptr, offset_size); |
cf2c3c16 | 23555 | mac_ptr += offset_size; |
2e276125 | 23556 | |
0af92d60 JK |
23557 | if (macinfo_type == DW_MACRO_define_sup |
23558 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 23559 | || section_is_dwz) |
36586728 | 23560 | { |
ed2dc618 SM |
23561 | struct dwz_file *dwz |
23562 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 23563 | |
ed2dc618 SM |
23564 | body = read_indirect_string_from_dwz (objfile, |
23565 | dwz, str_offset); | |
36586728 TT |
23566 | } |
23567 | else | |
ed2dc618 SM |
23568 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
23569 | abfd, str_offset); | |
cf2c3c16 TT |
23570 | } |
23571 | ||
0af92d60 JK |
23572 | is_define = (macinfo_type == DW_MACRO_define |
23573 | || macinfo_type == DW_MACRO_define_strp | |
23574 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 23575 | if (! current_file) |
757a13d0 JK |
23576 | { |
23577 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 23578 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 23579 | "on line %d: %s"), |
cf2c3c16 TT |
23580 | is_define ? _("definition") : _("undefinition"), |
23581 | line, body); | |
757a13d0 JK |
23582 | break; |
23583 | } | |
3e43a32a MS |
23584 | if ((line == 0 && !at_commandline) |
23585 | || (line != 0 && at_commandline)) | |
b98664d3 | 23586 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 23587 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 23588 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
23589 | line == 0 ? _("zero") : _("non-zero"), line, body); |
23590 | ||
955b06fa | 23591 | if (body == NULL) |
7bede828 | 23592 | { |
955b06fa SDJ |
23593 | /* Fedora's rpm-build's "debugedit" binary |
23594 | corrupted .debug_macro sections. | |
23595 | ||
23596 | For more info, see | |
23597 | https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */ | |
23598 | complaint (_("debug info gives %s invalid macro %s " | |
23599 | "without body (corrupted?) at line %d " | |
23600 | "on file %s"), | |
23601 | at_commandline ? _("command-line") : _("in-file"), | |
23602 | is_define ? _("definition") : _("undefinition"), | |
23603 | line, current_file->filename); | |
7bede828 | 23604 | } |
955b06fa SDJ |
23605 | else if (is_define) |
23606 | parse_macro_definition (current_file, line, body); | |
cf2c3c16 TT |
23607 | else |
23608 | { | |
0af92d60 JK |
23609 | gdb_assert (macinfo_type == DW_MACRO_undef |
23610 | || macinfo_type == DW_MACRO_undef_strp | |
23611 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
23612 | macro_undef (current_file, line, body); |
23613 | } | |
2e276125 JB |
23614 | } |
23615 | break; | |
23616 | ||
0af92d60 | 23617 | case DW_MACRO_start_file: |
2e276125 | 23618 | { |
891d2f0b | 23619 | unsigned int bytes_read; |
2e276125 JB |
23620 | int line, file; |
23621 | ||
23622 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23623 | mac_ptr += bytes_read; | |
23624 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23625 | mac_ptr += bytes_read; | |
23626 | ||
3e43a32a MS |
23627 | if ((line == 0 && !at_commandline) |
23628 | || (line != 0 && at_commandline)) | |
b98664d3 | 23629 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
23630 | "from %s at %s line %d"), |
23631 | file, at_commandline ? _("command-line") : _("file"), | |
23632 | line == 0 ? _("zero") : _("non-zero"), line); | |
23633 | ||
23634 | if (at_commandline) | |
23635 | { | |
0af92d60 | 23636 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 23637 | pass one. */ |
757a13d0 JK |
23638 | at_commandline = 0; |
23639 | } | |
23640 | else | |
804d2729 TT |
23641 | current_file = macro_start_file (cu, file, line, current_file, |
23642 | lh); | |
2e276125 JB |
23643 | } |
23644 | break; | |
23645 | ||
0af92d60 | 23646 | case DW_MACRO_end_file: |
2e276125 | 23647 | if (! current_file) |
b98664d3 | 23648 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 23649 | "`close_file' directive")); |
2e276125 JB |
23650 | else |
23651 | { | |
23652 | current_file = current_file->included_by; | |
23653 | if (! current_file) | |
23654 | { | |
cf2c3c16 | 23655 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
23656 | |
23657 | /* GCC circa March 2002 doesn't produce the zero | |
23658 | type byte marking the end of the compilation | |
23659 | unit. Complain if it's not there, but exit no | |
23660 | matter what. */ | |
23661 | ||
23662 | /* Do we at least have room for a macinfo type byte? */ | |
23663 | if (mac_ptr >= mac_end) | |
23664 | { | |
f664829e | 23665 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
23666 | return; |
23667 | } | |
23668 | ||
23669 | /* We don't increment mac_ptr here, so this is just | |
23670 | a look-ahead. */ | |
aead7601 SM |
23671 | next_type |
23672 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
23673 | mac_ptr); | |
2e276125 | 23674 | if (next_type != 0) |
b98664d3 | 23675 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 23676 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
23677 | |
23678 | return; | |
23679 | } | |
23680 | } | |
23681 | break; | |
23682 | ||
0af92d60 JK |
23683 | case DW_MACRO_import: |
23684 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
23685 | { |
23686 | LONGEST offset; | |
8fc3fc34 | 23687 | void **slot; |
a036ba48 TT |
23688 | bfd *include_bfd = abfd; |
23689 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 23690 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 23691 | int is_dwz = section_is_dwz; |
d521ce57 | 23692 | const gdb_byte *new_mac_ptr; |
cf2c3c16 | 23693 | |
24aa364d | 23694 | offset = read_offset (abfd, mac_ptr, offset_size); |
cf2c3c16 TT |
23695 | mac_ptr += offset_size; |
23696 | ||
0af92d60 | 23697 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 23698 | { |
ed2dc618 | 23699 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 23700 | |
96b79293 | 23701 | dwz->macro.read (objfile); |
a036ba48 | 23702 | |
a036ba48 | 23703 | include_section = &dwz->macro; |
96b79293 | 23704 | include_bfd = include_section->get_bfd_owner (); |
a036ba48 TT |
23705 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
23706 | is_dwz = 1; | |
23707 | } | |
23708 | ||
23709 | new_mac_ptr = include_section->buffer + offset; | |
23710 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
23711 | ||
8fc3fc34 TT |
23712 | if (*slot != NULL) |
23713 | { | |
23714 | /* This has actually happened; see | |
23715 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 23716 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
23717 | ".debug_macro section")); |
23718 | } | |
23719 | else | |
23720 | { | |
d521ce57 | 23721 | *slot = (void *) new_mac_ptr; |
36586728 | 23722 | |
804d2729 | 23723 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 23724 | include_mac_end, current_file, lh, |
36586728 | 23725 | section, section_is_gnu, is_dwz, |
4d663531 | 23726 | offset_size, include_hash); |
8fc3fc34 | 23727 | |
d521ce57 | 23728 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 23729 | } |
cf2c3c16 TT |
23730 | } |
23731 | break; | |
23732 | ||
2e276125 | 23733 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
23734 | if (!section_is_gnu) |
23735 | { | |
23736 | unsigned int bytes_read; | |
2e276125 | 23737 | |
ac298888 TT |
23738 | /* This reads the constant, but since we don't recognize |
23739 | any vendor extensions, we ignore it. */ | |
23740 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
23741 | mac_ptr += bytes_read; |
23742 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23743 | mac_ptr += bytes_read; | |
2e276125 | 23744 | |
cf2c3c16 TT |
23745 | /* We don't recognize any vendor extensions. */ |
23746 | break; | |
23747 | } | |
23748 | /* FALLTHROUGH */ | |
23749 | ||
23750 | default: | |
23751 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23752 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23753 | section); |
23754 | if (mac_ptr == NULL) | |
23755 | return; | |
23756 | break; | |
2e276125 | 23757 | } |
132448f8 | 23758 | DIAGNOSTIC_POP |
757a13d0 | 23759 | } while (macinfo_type != 0); |
2e276125 | 23760 | } |
8e19ed76 | 23761 | |
cf2c3c16 | 23762 | static void |
09262596 | 23763 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 23764 | int section_is_gnu) |
cf2c3c16 | 23765 | { |
518817b3 SM |
23766 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23767 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 23768 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
23769 | struct line_header *lh = cu->line_header; |
23770 | bfd *abfd; | |
d521ce57 | 23771 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
23772 | struct macro_source_file *current_file = 0; |
23773 | enum dwarf_macro_record_type macinfo_type; | |
23774 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 23775 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 23776 | void **slot; |
09262596 DE |
23777 | struct dwarf2_section_info *section; |
23778 | const char *section_name; | |
23779 | ||
23780 | if (cu->dwo_unit != NULL) | |
23781 | { | |
23782 | if (section_is_gnu) | |
23783 | { | |
23784 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23785 | section_name = ".debug_macro.dwo"; | |
23786 | } | |
23787 | else | |
23788 | { | |
23789 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23790 | section_name = ".debug_macinfo.dwo"; | |
23791 | } | |
23792 | } | |
23793 | else | |
23794 | { | |
23795 | if (section_is_gnu) | |
23796 | { | |
23797 | section = &dwarf2_per_objfile->macro; | |
23798 | section_name = ".debug_macro"; | |
23799 | } | |
23800 | else | |
23801 | { | |
23802 | section = &dwarf2_per_objfile->macinfo; | |
23803 | section_name = ".debug_macinfo"; | |
23804 | } | |
23805 | } | |
cf2c3c16 | 23806 | |
96b79293 | 23807 | section->read (objfile); |
cf2c3c16 TT |
23808 | if (section->buffer == NULL) |
23809 | { | |
b98664d3 | 23810 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
23811 | return; |
23812 | } | |
96b79293 | 23813 | abfd = section->get_bfd_owner (); |
cf2c3c16 TT |
23814 | |
23815 | /* First pass: Find the name of the base filename. | |
23816 | This filename is needed in order to process all macros whose definition | |
23817 | (or undefinition) comes from the command line. These macros are defined | |
23818 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
23819 | associated to the base file. | |
23820 | ||
23821 | To determine the base file name, we scan the macro definitions until we | |
23822 | reach the first DW_MACINFO_start_file entry. We then initialize | |
23823 | CURRENT_FILE accordingly so that any macro definition found before the | |
23824 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
23825 | ||
23826 | mac_ptr = section->buffer + offset; | |
23827 | mac_end = section->buffer + section->size; | |
23828 | ||
23829 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
23830 | &offset_size, section_is_gnu); | |
23831 | if (mac_ptr == NULL) | |
23832 | { | |
23833 | /* We already issued a complaint. */ | |
23834 | return; | |
23835 | } | |
23836 | ||
23837 | do | |
23838 | { | |
23839 | /* Do we at least have room for a macinfo type byte? */ | |
23840 | if (mac_ptr >= mac_end) | |
23841 | { | |
23842 | /* Complaint is printed during the second pass as GDB will probably | |
23843 | stop the first pass earlier upon finding | |
23844 | DW_MACINFO_start_file. */ | |
23845 | break; | |
23846 | } | |
23847 | ||
aead7601 | 23848 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
23849 | mac_ptr++; |
23850 | ||
23851 | /* Note that we rely on the fact that the corresponding GNU and | |
23852 | DWARF constants are the same. */ | |
132448f8 SM |
23853 | DIAGNOSTIC_PUSH |
23854 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
23855 | switch (macinfo_type) |
23856 | { | |
23857 | /* A zero macinfo type indicates the end of the macro | |
23858 | information. */ | |
23859 | case 0: | |
23860 | break; | |
23861 | ||
0af92d60 JK |
23862 | case DW_MACRO_define: |
23863 | case DW_MACRO_undef: | |
cf2c3c16 TT |
23864 | /* Only skip the data by MAC_PTR. */ |
23865 | { | |
23866 | unsigned int bytes_read; | |
23867 | ||
23868 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23869 | mac_ptr += bytes_read; | |
23870 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23871 | mac_ptr += bytes_read; | |
23872 | } | |
23873 | break; | |
23874 | ||
0af92d60 | 23875 | case DW_MACRO_start_file: |
cf2c3c16 TT |
23876 | { |
23877 | unsigned int bytes_read; | |
23878 | int line, file; | |
23879 | ||
23880 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23881 | mac_ptr += bytes_read; | |
23882 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23883 | mac_ptr += bytes_read; | |
23884 | ||
804d2729 | 23885 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
23886 | } |
23887 | break; | |
23888 | ||
0af92d60 | 23889 | case DW_MACRO_end_file: |
cf2c3c16 TT |
23890 | /* No data to skip by MAC_PTR. */ |
23891 | break; | |
23892 | ||
0af92d60 JK |
23893 | case DW_MACRO_define_strp: |
23894 | case DW_MACRO_undef_strp: | |
23895 | case DW_MACRO_define_sup: | |
23896 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
23897 | { |
23898 | unsigned int bytes_read; | |
23899 | ||
23900 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23901 | mac_ptr += bytes_read; | |
23902 | mac_ptr += offset_size; | |
23903 | } | |
23904 | break; | |
23905 | ||
0af92d60 JK |
23906 | case DW_MACRO_import: |
23907 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23908 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23909 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23910 | skip this opcode. */ |
23911 | mac_ptr += offset_size; | |
23912 | break; | |
23913 | ||
23914 | case DW_MACINFO_vendor_ext: | |
23915 | /* Only skip the data by MAC_PTR. */ | |
23916 | if (!section_is_gnu) | |
23917 | { | |
23918 | unsigned int bytes_read; | |
23919 | ||
23920 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23921 | mac_ptr += bytes_read; | |
23922 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23923 | mac_ptr += bytes_read; | |
23924 | } | |
23925 | /* FALLTHROUGH */ | |
23926 | ||
23927 | default: | |
23928 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23929 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23930 | section); |
23931 | if (mac_ptr == NULL) | |
23932 | return; | |
23933 | break; | |
23934 | } | |
132448f8 | 23935 | DIAGNOSTIC_POP |
cf2c3c16 TT |
23936 | } while (macinfo_type != 0 && current_file == NULL); |
23937 | ||
23938 | /* Second pass: Process all entries. | |
23939 | ||
23940 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23941 | command-line macro definitions/undefinitions. This flag is unset when we | |
23942 | reach the first DW_MACINFO_start_file entry. */ | |
23943 | ||
fc4007c9 TT |
23944 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23945 | htab_eq_pointer, | |
23946 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23947 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23948 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23949 | *slot = (void *) mac_ptr; |
804d2729 | 23950 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 23951 | current_file, lh, section, |
fc4007c9 TT |
23952 | section_is_gnu, 0, offset_size, |
23953 | include_hash.get ()); | |
cf2c3c16 TT |
23954 | } |
23955 | ||
3019eac3 DE |
23956 | /* Return the .debug_loc section to use for CU. |
23957 | For DWO files use .debug_loc.dwo. */ | |
23958 | ||
23959 | static struct dwarf2_section_info * | |
23960 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23961 | { | |
518817b3 SM |
23962 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23963 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23964 | |
3019eac3 | 23965 | if (cu->dwo_unit) |
43988095 JK |
23966 | { |
23967 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 23968 | |
43988095 JK |
23969 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
23970 | } | |
23971 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23972 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23973 | } |
23974 | ||
8cf6f0b1 TT |
23975 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23976 | ||
23977 | static void | |
23978 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23979 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23980 | const struct attribute *attr) |
8cf6f0b1 | 23981 | { |
518817b3 SM |
23982 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23983 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
23984 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23985 | ||
96b79293 | 23986 | section->read (dwarf2_per_objfile->objfile); |
8cf6f0b1 TT |
23987 | |
23988 | baton->per_cu = cu->per_cu; | |
23989 | gdb_assert (baton->per_cu); | |
23990 | /* We don't know how long the location list is, but make sure we | |
23991 | don't run off the edge of the section. */ | |
3019eac3 DE |
23992 | baton->size = section->size - DW_UNSND (attr); |
23993 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23994 | baton->base_address = cu->base_address; |
f664829e | 23995 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23996 | } |
23997 | ||
4c2df51b | 23998 | static void |
ff39bb5e | 23999 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 24000 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 24001 | { |
518817b3 SM |
24002 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24003 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 24004 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 24005 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 24006 | |
cd6c91b4 | 24007 | if (attr->form_is_section_offset () |
3019eac3 | 24008 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
24009 | the section. If so, fall through to the complaint in the |
24010 | other branch. */ | |
2c7d5afc | 24011 | && DW_UNSND (attr) < section->get_size (objfile)) |
4c2df51b | 24012 | { |
0d53c4c4 | 24013 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 24014 | |
8d749320 | 24015 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 24016 | |
8cf6f0b1 | 24017 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 24018 | |
d00adf39 | 24019 | if (cu->base_known == 0) |
b98664d3 | 24020 | complaint (_("Location list used without " |
3e43a32a | 24021 | "specifying the CU base address.")); |
4c2df51b | 24022 | |
f1e6e072 TT |
24023 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24024 | ? dwarf2_loclist_block_index | |
24025 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24026 | SYMBOL_LOCATION_BATON (sym) = baton; |
24027 | } | |
24028 | else | |
24029 | { | |
24030 | struct dwarf2_locexpr_baton *baton; | |
24031 | ||
8d749320 | 24032 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
24033 | baton->per_cu = cu->per_cu; |
24034 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 24035 | |
4fc6c0d5 | 24036 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
24037 | { |
24038 | /* Note that we're just copying the block's data pointer | |
24039 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24040 | info_buffer for SYM's objfile; right now we never release |
24041 | that buffer, but when we do clean up properly this may | |
24042 | need to change. */ | |
0d53c4c4 DJ |
24043 | baton->size = DW_BLOCK (attr)->size; |
24044 | baton->data = DW_BLOCK (attr)->data; | |
24045 | } | |
24046 | else | |
24047 | { | |
24048 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 24049 | sym->natural_name ()); |
0d53c4c4 | 24050 | baton->size = 0; |
0d53c4c4 | 24051 | } |
6e70227d | 24052 | |
f1e6e072 TT |
24053 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24054 | ? dwarf2_locexpr_block_index | |
24055 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24056 | SYMBOL_LOCATION_BATON (sym) = baton; |
24057 | } | |
4c2df51b | 24058 | } |
6502dd73 | 24059 | |
09ba997f | 24060 | /* See read.h. */ |
ae0d2f24 UW |
24061 | |
24062 | struct objfile * | |
09ba997f | 24063 | dwarf2_per_cu_data::objfile () const |
ae0d2f24 | 24064 | { |
09ba997f | 24065 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
24066 | |
24067 | /* Return the master objfile, so that we can report and look up the | |
24068 | correct file containing this variable. */ | |
24069 | if (objfile->separate_debug_objfile_backlink) | |
24070 | objfile = objfile->separate_debug_objfile_backlink; | |
24071 | ||
24072 | return objfile; | |
24073 | } | |
24074 | ||
96408a79 SA |
24075 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
24076 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
24077 | CU_HEADERP first. */ | |
24078 | ||
24079 | static const struct comp_unit_head * | |
24080 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
09ba997f | 24081 | const struct dwarf2_per_cu_data *per_cu) |
96408a79 | 24082 | { |
d521ce57 | 24083 | const gdb_byte *info_ptr; |
96408a79 SA |
24084 | |
24085 | if (per_cu->cu) | |
24086 | return &per_cu->cu->header; | |
24087 | ||
9c541725 | 24088 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
24089 | |
24090 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
24091 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
24092 | rcuh_kind::COMPILE); | |
96408a79 SA |
24093 | |
24094 | return cu_headerp; | |
24095 | } | |
24096 | ||
09ba997f | 24097 | /* See read.h. */ |
ae0d2f24 | 24098 | |
98714339 | 24099 | int |
09ba997f | 24100 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 24101 | { |
96408a79 SA |
24102 | struct comp_unit_head cu_header_local; |
24103 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 24104 | |
09ba997f | 24105 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24106 | |
24107 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
24108 | } |
24109 | ||
09ba997f | 24110 | /* See read.h. */ |
9eae7c52 TT |
24111 | |
24112 | int | |
09ba997f | 24113 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 24114 | { |
96408a79 SA |
24115 | struct comp_unit_head cu_header_local; |
24116 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 24117 | |
09ba997f | 24118 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24119 | |
24120 | return cu_headerp->offset_size; | |
24121 | } | |
24122 | ||
09ba997f | 24123 | /* See read.h. */ |
96408a79 SA |
24124 | |
24125 | int | |
09ba997f | 24126 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 SA |
24127 | { |
24128 | struct comp_unit_head cu_header_local; | |
24129 | const struct comp_unit_head *cu_headerp; | |
24130 | ||
09ba997f | 24131 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24132 | |
24133 | if (cu_headerp->version == 2) | |
24134 | return cu_headerp->addr_size; | |
24135 | else | |
24136 | return cu_headerp->offset_size; | |
181cebd4 JK |
24137 | } |
24138 | ||
09ba997f | 24139 | /* See read.h. */ |
9aa1f1e3 TT |
24140 | |
24141 | CORE_ADDR | |
09ba997f | 24142 | dwarf2_per_cu_data::text_offset () const |
9aa1f1e3 | 24143 | { |
09ba997f TT |
24144 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
24145 | ||
24146 | return objfile->text_section_offset (); | |
9aa1f1e3 TT |
24147 | } |
24148 | ||
09ba997f TT |
24149 | /* See read.h. */ |
24150 | ||
24151 | struct type * | |
24152 | dwarf2_per_cu_data::addr_type () const | |
9a49df9d | 24153 | { |
09ba997f | 24154 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
24155 | struct type *void_type = objfile_type (objfile)->builtin_void; |
24156 | struct type *addr_type = lookup_pointer_type (void_type); | |
09ba997f | 24157 | int addr_size = this->addr_size (); |
9a49df9d AB |
24158 | |
24159 | if (TYPE_LENGTH (addr_type) == addr_size) | |
24160 | return addr_type; | |
24161 | ||
09ba997f | 24162 | addr_type = addr_sized_int_type (TYPE_UNSIGNED (addr_type)); |
9a49df9d AB |
24163 | return addr_type; |
24164 | } | |
24165 | ||
22b6cd70 TT |
24166 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
24167 | the index of the result, and that searches a vector. It will | |
24168 | return a result even if the offset in question does not actually | |
24169 | occur in any CU. This is separate so that it can be unit | |
24170 | tested. */ | |
ae038cb0 | 24171 | |
22b6cd70 TT |
24172 | static int |
24173 | dwarf2_find_containing_comp_unit | |
24174 | (sect_offset sect_off, | |
24175 | unsigned int offset_in_dwz, | |
24176 | const std::vector<dwarf2_per_cu_data *> &all_comp_units) | |
ae038cb0 | 24177 | { |
ae038cb0 DJ |
24178 | int low, high; |
24179 | ||
ae038cb0 | 24180 | low = 0; |
22b6cd70 | 24181 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
24182 | while (high > low) |
24183 | { | |
36586728 | 24184 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24185 | int mid = low + (high - low) / 2; |
9a619af0 | 24186 | |
22b6cd70 | 24187 | mid_cu = all_comp_units[mid]; |
36586728 | 24188 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 24189 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 24190 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
24191 | high = mid; |
24192 | else | |
24193 | low = mid + 1; | |
24194 | } | |
24195 | gdb_assert (low == high); | |
22b6cd70 TT |
24196 | return low; |
24197 | } | |
24198 | ||
24199 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
24200 | the DIE at OFFSET. Raises an error on failure. */ | |
24201 | ||
24202 | static struct dwarf2_per_cu_data * | |
24203 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
24204 | unsigned int offset_in_dwz, | |
24205 | struct dwarf2_per_objfile *dwarf2_per_objfile) | |
24206 | { | |
24207 | int low | |
24208 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
24209 | dwarf2_per_objfile->all_comp_units); | |
24210 | struct dwarf2_per_cu_data *this_cu | |
24211 | = dwarf2_per_objfile->all_comp_units[low]; | |
24212 | ||
45b8ae0c | 24213 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 24214 | { |
36586728 | 24215 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24216 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
24217 | "offset %s [in module %s]"), |
24218 | sect_offset_str (sect_off), | |
ed2dc618 | 24219 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 24220 | |
9c541725 PA |
24221 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
24222 | <= sect_off); | |
ae038cb0 DJ |
24223 | return dwarf2_per_objfile->all_comp_units[low-1]; |
24224 | } | |
24225 | else | |
24226 | { | |
b76e467d | 24227 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 24228 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 24229 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 24230 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
24231 | return this_cu; |
24232 | } | |
24233 | } | |
24234 | ||
22b6cd70 TT |
24235 | #if GDB_SELF_TEST |
24236 | ||
24237 | namespace selftests { | |
24238 | namespace find_containing_comp_unit { | |
24239 | ||
24240 | static void | |
24241 | run_test () | |
24242 | { | |
24243 | struct dwarf2_per_cu_data one {}; | |
24244 | struct dwarf2_per_cu_data two {}; | |
24245 | struct dwarf2_per_cu_data three {}; | |
24246 | struct dwarf2_per_cu_data four {}; | |
24247 | ||
24248 | one.length = 5; | |
24249 | two.sect_off = sect_offset (one.length); | |
24250 | two.length = 7; | |
24251 | ||
24252 | three.length = 5; | |
24253 | three.is_dwz = 1; | |
24254 | four.sect_off = sect_offset (three.length); | |
24255 | four.length = 7; | |
24256 | four.is_dwz = 1; | |
24257 | ||
24258 | std::vector<dwarf2_per_cu_data *> units; | |
24259 | units.push_back (&one); | |
24260 | units.push_back (&two); | |
24261 | units.push_back (&three); | |
24262 | units.push_back (&four); | |
24263 | ||
24264 | int result; | |
24265 | ||
24266 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
24267 | SELF_CHECK (units[result] == &one); | |
24268 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); | |
24269 | SELF_CHECK (units[result] == &one); | |
24270 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); | |
24271 | SELF_CHECK (units[result] == &two); | |
24272 | ||
24273 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
24274 | SELF_CHECK (units[result] == &three); | |
24275 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); | |
24276 | SELF_CHECK (units[result] == &three); | |
24277 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); | |
24278 | SELF_CHECK (units[result] == &four); | |
24279 | } | |
24280 | ||
24281 | } | |
24282 | } | |
24283 | ||
24284 | #endif /* GDB_SELF_TEST */ | |
24285 | ||
23745b47 | 24286 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 24287 | |
fcd3b13d SM |
24288 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
24289 | : per_cu (per_cu_), | |
9068261f AB |
24290 | mark (false), |
24291 | has_loclist (false), | |
24292 | checked_producer (false), | |
24293 | producer_is_gxx_lt_4_6 (false), | |
24294 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 24295 | producer_is_icc (false), |
9068261f | 24296 | producer_is_icc_lt_14 (false), |
c258c396 | 24297 | producer_is_codewarrior (false), |
9068261f | 24298 | processing_has_namespace_info (false) |
93311388 | 24299 | { |
fcd3b13d SM |
24300 | per_cu->cu = this; |
24301 | } | |
24302 | ||
24303 | /* Destroy a dwarf2_cu. */ | |
24304 | ||
24305 | dwarf2_cu::~dwarf2_cu () | |
24306 | { | |
24307 | per_cu->cu = NULL; | |
9816fde3 JK |
24308 | } |
24309 | ||
24310 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
24311 | ||
24312 | static void | |
95554aad TT |
24313 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24314 | enum language pretend_language) | |
9816fde3 JK |
24315 | { |
24316 | struct attribute *attr; | |
24317 | ||
24318 | /* Set the language we're debugging. */ | |
24319 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 24320 | if (attr != nullptr) |
9816fde3 JK |
24321 | set_cu_language (DW_UNSND (attr), cu); |
24322 | else | |
9cded63f | 24323 | { |
95554aad | 24324 | cu->language = pretend_language; |
9cded63f TT |
24325 | cu->language_defn = language_def (cu->language); |
24326 | } | |
dee91e82 | 24327 | |
7d45c7c3 | 24328 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24329 | } |
24330 | ||
ae038cb0 DJ |
24331 | /* Increase the age counter on each cached compilation unit, and free |
24332 | any that are too old. */ | |
24333 | ||
24334 | static void | |
ed2dc618 | 24335 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
24336 | { |
24337 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
24338 | ||
24339 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
24340 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24341 | while (per_cu != NULL) | |
24342 | { | |
24343 | per_cu->cu->last_used ++; | |
b4f54984 | 24344 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
24345 | dwarf2_mark (per_cu->cu); |
24346 | per_cu = per_cu->cu->read_in_chain; | |
24347 | } | |
24348 | ||
24349 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24350 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
24351 | while (per_cu != NULL) | |
24352 | { | |
24353 | struct dwarf2_per_cu_data *next_cu; | |
24354 | ||
24355 | next_cu = per_cu->cu->read_in_chain; | |
24356 | ||
24357 | if (!per_cu->cu->mark) | |
24358 | { | |
fcd3b13d | 24359 | delete per_cu->cu; |
ae038cb0 DJ |
24360 | *last_chain = next_cu; |
24361 | } | |
24362 | else | |
24363 | last_chain = &per_cu->cu->read_in_chain; | |
24364 | ||
24365 | per_cu = next_cu; | |
24366 | } | |
24367 | } | |
24368 | ||
24369 | /* Remove a single compilation unit from the cache. */ | |
24370 | ||
24371 | static void | |
dee91e82 | 24372 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
24373 | { |
24374 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
24375 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24376 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
24377 | |
24378 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24379 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
24380 | while (per_cu != NULL) | |
24381 | { | |
24382 | struct dwarf2_per_cu_data *next_cu; | |
24383 | ||
24384 | next_cu = per_cu->cu->read_in_chain; | |
24385 | ||
dee91e82 | 24386 | if (per_cu == target_per_cu) |
ae038cb0 | 24387 | { |
fcd3b13d | 24388 | delete per_cu->cu; |
dee91e82 | 24389 | per_cu->cu = NULL; |
ae038cb0 DJ |
24390 | *last_chain = next_cu; |
24391 | break; | |
24392 | } | |
24393 | else | |
24394 | last_chain = &per_cu->cu->read_in_chain; | |
24395 | ||
24396 | per_cu = next_cu; | |
24397 | } | |
24398 | } | |
24399 | ||
dee91e82 DE |
24400 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
24401 | We store these in a hash table separate from the DIEs, and preserve them | |
24402 | when the DIEs are flushed out of cache. | |
24403 | ||
24404 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 24405 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
24406 | or the type may come from a DWO file. Furthermore, while it's more logical |
24407 | to use per_cu->section+offset, with Fission the section with the data is in | |
24408 | the DWO file but we don't know that section at the point we need it. | |
24409 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
24410 | because we can enter the lookup routine, get_die_type_at_offset, from | |
24411 | outside this file, and thus won't necessarily have PER_CU->cu. | |
24412 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 24413 | |
dee91e82 | 24414 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 24415 | { |
dee91e82 | 24416 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 24417 | sect_offset sect_off; |
1c379e20 DJ |
24418 | struct type *type; |
24419 | }; | |
24420 | ||
dee91e82 | 24421 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24422 | |
24423 | static hashval_t | |
dee91e82 | 24424 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 24425 | { |
9a3c8263 SM |
24426 | const struct dwarf2_per_cu_offset_and_type *ofs |
24427 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 24428 | |
9c541725 | 24429 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
24430 | } |
24431 | ||
dee91e82 | 24432 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24433 | |
24434 | static int | |
dee91e82 | 24435 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 24436 | { |
9a3c8263 SM |
24437 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
24438 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
24439 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
24440 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 24441 | |
dee91e82 | 24442 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 24443 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
24444 | } |
24445 | ||
24446 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
24447 | table if necessary. For convenience, return TYPE. |
24448 | ||
24449 | The DIEs reading must have careful ordering to: | |
85102364 | 24450 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
24451 | reading current DIE. |
24452 | * Not trying to dereference contents of still incompletely read in types | |
24453 | while reading in other DIEs. | |
24454 | * Enable referencing still incompletely read in types just by a pointer to | |
24455 | the type without accessing its fields. | |
24456 | ||
24457 | Therefore caller should follow these rules: | |
24458 | * Try to fetch any prerequisite types we may need to build this DIE type | |
24459 | before building the type and calling set_die_type. | |
e71ec853 | 24460 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
24461 | possible before fetching more types to complete the current type. |
24462 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 24463 | |
f792889a | 24464 | static struct type * |
1c379e20 DJ |
24465 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
24466 | { | |
518817b3 SM |
24467 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24468 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 24469 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 24470 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
24471 | struct attribute *attr; |
24472 | struct dynamic_prop prop; | |
1c379e20 | 24473 | |
b4ba55a1 JB |
24474 | /* For Ada types, make sure that the gnat-specific data is always |
24475 | initialized (if not already set). There are a few types where | |
24476 | we should not be doing so, because the type-specific area is | |
24477 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
24478 | where the type-specific area is used to store the floatformat). | |
24479 | But this is not a problem, because the gnat-specific information | |
24480 | is actually not needed for these types. */ | |
24481 | if (need_gnat_info (cu) | |
24482 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
24483 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
24484 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
24485 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
24486 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
24487 | && !HAVE_GNAT_AUX_INFO (type)) |
24488 | INIT_GNAT_SPECIFIC (type); | |
24489 | ||
3f2f83dd KB |
24490 | /* Read DW_AT_allocated and set in type. */ |
24491 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
4fc6c0d5 | 24492 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 24493 | { |
09ba997f | 24494 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 24495 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 24496 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
24497 | } |
24498 | else if (attr != NULL) | |
24499 | { | |
b98664d3 | 24500 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 24501 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 24502 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
24503 | } |
24504 | ||
24505 | /* Read DW_AT_associated and set in type. */ | |
24506 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
4fc6c0d5 | 24507 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 24508 | { |
09ba997f | 24509 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 24510 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 24511 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
24512 | } |
24513 | else if (attr != NULL) | |
24514 | { | |
b98664d3 | 24515 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 24516 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 24517 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
24518 | } |
24519 | ||
3cdcd0ce JB |
24520 | /* Read DW_AT_data_location and set in type. */ |
24521 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d | 24522 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
09ba997f | 24523 | cu->per_cu->addr_type ())) |
50a82047 | 24524 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 24525 | |
dee91e82 | 24526 | if (dwarf2_per_objfile->die_type_hash == NULL) |
0335378b TT |
24527 | dwarf2_per_objfile->die_type_hash |
24528 | = htab_up (htab_create_alloc (127, | |
24529 | per_cu_offset_and_type_hash, | |
24530 | per_cu_offset_and_type_eq, | |
24531 | NULL, xcalloc, xfree)); | |
1c379e20 | 24532 | |
dee91e82 | 24533 | ofs.per_cu = cu->per_cu; |
9c541725 | 24534 | ofs.sect_off = die->sect_off; |
1c379e20 | 24535 | ofs.type = type; |
dee91e82 | 24536 | slot = (struct dwarf2_per_cu_offset_and_type **) |
0335378b | 24537 | htab_find_slot (dwarf2_per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 24538 | if (*slot) |
b98664d3 | 24539 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 24540 | sect_offset_str (die->sect_off)); |
8d749320 SM |
24541 | *slot = XOBNEW (&objfile->objfile_obstack, |
24542 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 24543 | **slot = ofs; |
f792889a | 24544 | return type; |
1c379e20 DJ |
24545 | } |
24546 | ||
9c541725 | 24547 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24548 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24549 | |
24550 | static struct type * | |
9c541725 | 24551 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 24552 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 24553 | { |
dee91e82 | 24554 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 24555 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 24556 | |
dee91e82 | 24557 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 24558 | return NULL; |
1c379e20 | 24559 | |
dee91e82 | 24560 | ofs.per_cu = per_cu; |
9c541725 | 24561 | ofs.sect_off = sect_off; |
9a3c8263 | 24562 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
0335378b | 24563 | htab_find (dwarf2_per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
24564 | if (slot) |
24565 | return slot->type; | |
24566 | else | |
24567 | return NULL; | |
24568 | } | |
24569 | ||
02142a6c | 24570 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24571 | or return NULL if DIE does not have a saved type. */ |
24572 | ||
24573 | static struct type * | |
24574 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24575 | { | |
9c541725 | 24576 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
24577 | } |
24578 | ||
10b3939b DJ |
24579 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
24580 | ||
24581 | static void | |
24582 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
24583 | struct dwarf2_per_cu_data *ref_per_cu) | |
24584 | { | |
24585 | void **slot; | |
24586 | ||
24587 | if (cu->dependencies == NULL) | |
24588 | cu->dependencies | |
24589 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
24590 | NULL, &cu->comp_unit_obstack, | |
24591 | hashtab_obstack_allocate, | |
24592 | dummy_obstack_deallocate); | |
24593 | ||
24594 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
24595 | if (*slot == NULL) | |
24596 | *slot = ref_per_cu; | |
24597 | } | |
1c379e20 | 24598 | |
f504f079 DE |
24599 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
24600 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
24601 | cache that we must keep because we are keeping CU. */ |
24602 | ||
10b3939b DJ |
24603 | static int |
24604 | dwarf2_mark_helper (void **slot, void *data) | |
24605 | { | |
24606 | struct dwarf2_per_cu_data *per_cu; | |
24607 | ||
24608 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
24609 | |
24610 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
24611 | reading of the chain. As such dependencies remain valid it is not much | |
24612 | useful to track and undo them during QUIT cleanups. */ | |
24613 | if (per_cu->cu == NULL) | |
24614 | return 1; | |
24615 | ||
10b3939b DJ |
24616 | if (per_cu->cu->mark) |
24617 | return 1; | |
9068261f | 24618 | per_cu->cu->mark = true; |
10b3939b DJ |
24619 | |
24620 | if (per_cu->cu->dependencies != NULL) | |
24621 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
24622 | ||
24623 | return 1; | |
24624 | } | |
24625 | ||
f504f079 DE |
24626 | /* Set the mark field in CU and in every other compilation unit in the |
24627 | cache that we must keep because we are keeping CU. */ | |
24628 | ||
ae038cb0 DJ |
24629 | static void |
24630 | dwarf2_mark (struct dwarf2_cu *cu) | |
24631 | { | |
24632 | if (cu->mark) | |
24633 | return; | |
9068261f | 24634 | cu->mark = true; |
10b3939b DJ |
24635 | if (cu->dependencies != NULL) |
24636 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
24637 | } |
24638 | ||
24639 | static void | |
24640 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
24641 | { | |
24642 | while (per_cu) | |
24643 | { | |
9068261f | 24644 | per_cu->cu->mark = false; |
ae038cb0 DJ |
24645 | per_cu = per_cu->cu->read_in_chain; |
24646 | } | |
72bf9492 DJ |
24647 | } |
24648 | ||
72bf9492 DJ |
24649 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24650 | is its offset in .debug_info for this objfile. */ | |
24651 | ||
24652 | static hashval_t | |
24653 | partial_die_hash (const void *item) | |
24654 | { | |
9a3c8263 SM |
24655 | const struct partial_die_info *part_die |
24656 | = (const struct partial_die_info *) item; | |
9a619af0 | 24657 | |
9c541725 | 24658 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24659 | } |
24660 | ||
24661 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24662 | are equal if they have the same offset. */ | |
24663 | ||
24664 | static int | |
24665 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24666 | { | |
9a3c8263 SM |
24667 | const struct partial_die_info *part_die_lhs |
24668 | = (const struct partial_die_info *) item_lhs; | |
24669 | const struct partial_die_info *part_die_rhs | |
24670 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24671 | |
9c541725 | 24672 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24673 | } |
24674 | ||
3c3bb058 AB |
24675 | struct cmd_list_element *set_dwarf_cmdlist; |
24676 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
24677 | |
24678 | static void | |
981a3fb3 | 24679 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 24680 | { |
b4f54984 | 24681 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 24682 | gdb_stdout); |
ae038cb0 DJ |
24683 | } |
24684 | ||
24685 | static void | |
981a3fb3 | 24686 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 24687 | { |
b4f54984 | 24688 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
24689 | } |
24690 | ||
9291a0cd | 24691 | static void |
cd4fb1b2 SM |
24692 | show_check_physname (struct ui_file *file, int from_tty, |
24693 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 24694 | { |
cd4fb1b2 SM |
24695 | fprintf_filtered (file, |
24696 | _("Whether to check \"physname\" is %s.\n"), | |
24697 | value); | |
9291a0cd TT |
24698 | } |
24699 | ||
6c265988 | 24700 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 24701 | void |
6c265988 | 24702 | _initialize_dwarf2_read () |
9291a0cd | 24703 | { |
cd4fb1b2 SM |
24704 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24705 | Set DWARF specific variables.\n\ | |
590042fc | 24706 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
24707 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
24708 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 24709 | |
cd4fb1b2 | 24710 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
24711 | Show DWARF specific variables.\n\ |
24712 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
24713 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
24714 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 24715 | |
cd4fb1b2 SM |
24716 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
24717 | &dwarf_max_cache_age, _("\ | |
24718 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24719 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
24720 | A higher limit means that cached compilation units will be stored\n\ | |
24721 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24722 | caching, which can slow down startup."), | |
24723 | NULL, | |
24724 | show_dwarf_max_cache_age, | |
24725 | &set_dwarf_cmdlist, | |
24726 | &show_dwarf_cmdlist); | |
156942c7 | 24727 | |
cd4fb1b2 SM |
24728 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
24729 | Set debugging of the DWARF reader."), _("\ | |
24730 | Show debugging of the DWARF reader."), _("\ | |
24731 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
24732 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
24733 | information. A value greater than 1 provides more verbose information."), | |
24734 | NULL, | |
24735 | NULL, | |
24736 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24737 | |
cd4fb1b2 SM |
24738 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24739 | Set debugging of the DWARF DIE reader."), _("\ | |
24740 | Show debugging of the DWARF DIE reader."), _("\ | |
24741 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
24742 | The value is the maximum depth to print."), | |
24743 | NULL, | |
24744 | NULL, | |
24745 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24746 | |
cd4fb1b2 SM |
24747 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24748 | Set debugging of the dwarf line reader."), _("\ | |
24749 | Show debugging of the dwarf line reader."), _("\ | |
24750 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24751 | A value of 1 (one) provides basic information.\n\ | |
24752 | A value greater than 1 provides more verbose information."), | |
24753 | NULL, | |
24754 | NULL, | |
24755 | &setdebuglist, &showdebuglist); | |
437afbb8 | 24756 | |
cd4fb1b2 SM |
24757 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24758 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24759 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24760 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24761 | the demangler."), | |
24762 | NULL, show_check_physname, | |
24763 | &setdebuglist, &showdebuglist); | |
900e11f9 | 24764 | |
e615022a DE |
24765 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24766 | no_class, &use_deprecated_index_sections, _("\ | |
24767 | Set whether to use deprecated gdb_index sections."), _("\ | |
24768 | Show whether to use deprecated gdb_index sections."), _("\ | |
24769 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24770 | Normally they are ignored either because of a missing feature or\n\ | |
24771 | performance issue.\n\ | |
24772 | Warning: This option must be enabled before gdb reads the file."), | |
24773 | NULL, | |
24774 | NULL, | |
24775 | &setlist, &showlist); | |
24776 | ||
f1e6e072 TT |
24777 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
24778 | &dwarf2_locexpr_funcs); | |
24779 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24780 | &dwarf2_loclist_funcs); | |
24781 | ||
24782 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24783 | &dwarf2_block_frame_base_locexpr_funcs); | |
24784 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24785 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24786 | |
24787 | #if GDB_SELF_TEST | |
24788 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24789 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
24790 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
24791 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 24792 | #endif |
6502dd73 | 24793 | } |