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 | |
7d0ccb61 | 1132 | /* Number of fields (including baseclasses). */ |
be2daae6 | 1133 | int nfields = 0; |
c906108c | 1134 | |
85102364 | 1135 | /* Set if the accessibility of one of the fields is not public. */ |
be2daae6 | 1136 | int non_public_fields = 0; |
c906108c | 1137 | |
c5aa993b JM |
1138 | /* Member function fieldlist array, contains name of possibly overloaded |
1139 | member function, number of overloaded member functions and a pointer | |
1140 | to the head of the member function field chain. */ | |
be2daae6 | 1141 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1142 | |
1143 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1144 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1145 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1146 | |
1147 | /* Nested types defined by this class and the number of elements in this | |
1148 | list. */ | |
be2daae6 | 1149 | std::vector<struct decl_field> nested_types_list; |
c5aa993b | 1150 | }; |
c906108c | 1151 | |
ae038cb0 DJ |
1152 | /* Loaded secondary compilation units are kept in memory until they |
1153 | have not been referenced for the processing of this many | |
1154 | compilation units. Set this to zero to disable caching. Cache | |
1155 | sizes of up to at least twenty will improve startup time for | |
1156 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1157 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1158 | static void |
b4f54984 DE |
1159 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1160 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1161 | { |
3e43a32a | 1162 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1163 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1164 | value); |
1165 | } | |
4390d890 | 1166 | \f |
c906108c SS |
1167 | /* local function prototypes */ |
1168 | ||
918dd910 JK |
1169 | static void dwarf2_find_base_address (struct die_info *die, |
1170 | struct dwarf2_cu *cu); | |
1171 | ||
891813be | 1172 | static dwarf2_psymtab *create_partial_symtab |
0018ea6f DE |
1173 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
1174 | ||
f1902523 JK |
1175 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1176 | const gdb_byte *info_ptr, | |
3e225074 | 1177 | struct die_info *type_unit_die); |
f1902523 | 1178 | |
ed2dc618 SM |
1179 | static void dwarf2_build_psymtabs_hard |
1180 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1181 | |
72bf9492 DJ |
1182 | static void scan_partial_symbols (struct partial_die_info *, |
1183 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1184 | int, struct dwarf2_cu *); |
c906108c | 1185 | |
72bf9492 DJ |
1186 | static void add_partial_symbol (struct partial_die_info *, |
1187 | struct dwarf2_cu *); | |
63d06c5c | 1188 | |
72bf9492 DJ |
1189 | static void add_partial_namespace (struct partial_die_info *pdi, |
1190 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1191 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1192 | |
5d7cb8df | 1193 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1194 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1195 | struct dwarf2_cu *cu); |
1196 | ||
72bf9492 DJ |
1197 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1198 | struct dwarf2_cu *cu); | |
91c24f0a | 1199 | |
bc30ff58 JB |
1200 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1201 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1202 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1203 | |
d521ce57 | 1204 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1205 | |
dee91e82 | 1206 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1207 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1208 | |
fb816e8b TV |
1209 | /* A pair of partial_die_info and compilation unit. */ |
1210 | struct cu_partial_die_info | |
1211 | { | |
1212 | /* The compilation unit of the partial_die_info. */ | |
1213 | struct dwarf2_cu *cu; | |
1214 | /* A partial_die_info. */ | |
1215 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1216 | |
1217 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1218 | : cu (cu), | |
1219 | pdi (pdi) | |
405feb71 | 1220 | { /* Nothing. */ } |
122cf0f2 AB |
1221 | |
1222 | private: | |
1223 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1224 | }; |
1225 | ||
122cf0f2 AB |
1226 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1227 | struct dwarf2_cu *); | |
72bf9492 | 1228 | |
d521ce57 TT |
1229 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1230 | struct attribute *, struct attr_abbrev *, | |
18a8505e AT |
1231 | const gdb_byte *, bool *need_reprocess); |
1232 | ||
1233 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
1234 | struct attribute *attr); | |
1235 | ||
1236 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1237 | |
c764a876 | 1238 | static LONGEST read_checked_initial_length_and_offset |
d521ce57 | 1239 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1240 | unsigned int *, unsigned int *); |
613e1657 | 1241 | |
ed2dc618 SM |
1242 | static sect_offset read_abbrev_offset |
1243 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1244 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1245 | |
ed2dc618 SM |
1246 | static const char *read_indirect_string |
1247 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1248 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1249 | |
ed2dc618 SM |
1250 | static const char *read_indirect_line_string |
1251 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1252 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1253 | |
ed2dc618 SM |
1254 | static const char *read_indirect_string_at_offset |
1255 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1256 | LONGEST str_offset); | |
927aa2e7 | 1257 | |
ed2dc618 SM |
1258 | static const char *read_indirect_string_from_dwz |
1259 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1260 | |
d521ce57 TT |
1261 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1262 | const gdb_byte *, | |
3019eac3 DE |
1263 | unsigned int *); |
1264 | ||
18a8505e AT |
1265 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1266 | ULONGEST str_index); | |
1267 | ||
1268 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1269 | ULONGEST str_index); | |
3019eac3 | 1270 | |
e142c38c | 1271 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1272 | |
e142c38c DJ |
1273 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1274 | struct dwarf2_cu *); | |
c906108c | 1275 | |
348e048f | 1276 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1277 | unsigned int); |
348e048f | 1278 | |
7d45c7c3 KB |
1279 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1280 | struct dwarf2_cu *cu); | |
1281 | ||
a084a2a6 AT |
1282 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1283 | ||
05cf31d1 JB |
1284 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1285 | struct dwarf2_cu *cu); | |
1286 | ||
e142c38c | 1287 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1288 | |
e142c38c | 1289 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1290 | struct dwarf2_cu **); |
63d06c5c | 1291 | |
9c541725 | 1292 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1293 | struct dwarf2_cu *cu); |
debd256d | 1294 | |
f3f5162e | 1295 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1296 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1297 | CORE_ADDR, int decode_mapping); |
c906108c | 1298 | |
804d2729 TT |
1299 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1300 | const char *); | |
c906108c | 1301 | |
a14ed312 | 1302 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1303 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1304 | |
ff39bb5e | 1305 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1306 | struct dwarf2_cu *); |
c906108c | 1307 | |
ff39bb5e | 1308 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1309 | struct type *type, |
1310 | const char *name, | |
1311 | struct obstack *obstack, | |
12df843f | 1312 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1313 | const gdb_byte **bytes, |
98bfdba5 | 1314 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1315 | |
e7c27a73 | 1316 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1317 | |
b4ba55a1 JB |
1318 | static int need_gnat_info (struct dwarf2_cu *); |
1319 | ||
3e43a32a MS |
1320 | static struct type *die_descriptive_type (struct die_info *, |
1321 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1322 | |
1323 | static void set_descriptive_type (struct type *, struct die_info *, | |
1324 | struct dwarf2_cu *); | |
1325 | ||
e7c27a73 DJ |
1326 | static struct type *die_containing_type (struct die_info *, |
1327 | struct dwarf2_cu *); | |
c906108c | 1328 | |
ff39bb5e | 1329 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1330 | struct dwarf2_cu *); |
c906108c | 1331 | |
f792889a | 1332 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1333 | |
673bfd45 DE |
1334 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1335 | ||
0d5cff50 | 1336 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1337 | |
6e70227d | 1338 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1339 | const char *suffix, int physname, |
1340 | struct dwarf2_cu *cu); | |
63d06c5c | 1341 | |
e7c27a73 | 1342 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1343 | |
348e048f DE |
1344 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1345 | ||
e7c27a73 | 1346 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1347 | |
e7c27a73 | 1348 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1349 | |
96408a79 SA |
1350 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1351 | ||
71a3c369 TT |
1352 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1353 | ||
ff013f42 | 1354 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
891813be | 1355 | struct dwarf2_cu *, dwarf2_psymtab *); |
ff013f42 | 1356 | |
3a2b436a | 1357 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1358 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1359 | enum pc_bounds_kind |
1360 | { | |
e385593e | 1361 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1362 | PC_BOUNDS_NOT_PRESENT, |
1363 | ||
e385593e JK |
1364 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1365 | were present but they do not form a valid range of PC addresses. */ | |
1366 | PC_BOUNDS_INVALID, | |
1367 | ||
3a2b436a JK |
1368 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1369 | PC_BOUNDS_RANGES, | |
1370 | ||
1371 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1372 | PC_BOUNDS_HIGH_LOW, | |
1373 | }; | |
1374 | ||
1375 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1376 | CORE_ADDR *, CORE_ADDR *, | |
1377 | struct dwarf2_cu *, | |
891813be | 1378 | dwarf2_psymtab *); |
c906108c | 1379 | |
fae299cd DC |
1380 | static void get_scope_pc_bounds (struct die_info *, |
1381 | CORE_ADDR *, CORE_ADDR *, | |
1382 | struct dwarf2_cu *); | |
1383 | ||
801e3a5b JB |
1384 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1385 | CORE_ADDR, struct dwarf2_cu *); | |
1386 | ||
a14ed312 | 1387 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1388 | struct dwarf2_cu *); |
c906108c | 1389 | |
a14ed312 | 1390 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1391 | struct type *, struct dwarf2_cu *); |
c906108c | 1392 | |
a14ed312 | 1393 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1394 | struct die_info *, struct type *, |
e7c27a73 | 1395 | struct dwarf2_cu *); |
c906108c | 1396 | |
a14ed312 | 1397 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1398 | struct type *, |
1399 | struct dwarf2_cu *); | |
c906108c | 1400 | |
134d01f1 | 1401 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1402 | |
e7c27a73 | 1403 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1404 | |
e7c27a73 | 1405 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1406 | |
5d7cb8df JK |
1407 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1408 | ||
804d2729 | 1409 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1410 | |
27aa8d6a SW |
1411 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1412 | ||
74921315 KS |
1413 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1414 | ||
f55ee35c JK |
1415 | static struct type *read_module_type (struct die_info *die, |
1416 | struct dwarf2_cu *cu); | |
1417 | ||
38d518c9 | 1418 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1419 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1420 | |
134d01f1 | 1421 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1422 | |
e7c27a73 | 1423 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1424 | |
6e70227d | 1425 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1426 | struct dwarf2_cu *); |
1427 | ||
bf6af496 | 1428 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1429 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1430 | struct die_info *); |
639d11d3 | 1431 | |
dee91e82 | 1432 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1433 | const gdb_byte *info_ptr, |
1434 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1435 | struct die_info *parent); |
1436 | ||
d521ce57 TT |
1437 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1438 | struct die_info **, const gdb_byte *, | |
3e225074 | 1439 | int); |
3019eac3 | 1440 | |
d521ce57 | 1441 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1442 | struct die_info **, const gdb_byte *); |
93311388 | 1443 | |
e7c27a73 | 1444 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1445 | |
15d034d0 TT |
1446 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1447 | struct obstack *); | |
71c25dea | 1448 | |
15d034d0 | 1449 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1450 | |
15d034d0 | 1451 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1452 | struct die_info *die, |
1453 | struct dwarf2_cu *cu); | |
1454 | ||
ca69b9e6 DE |
1455 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1456 | struct dwarf2_cu *cu); | |
1457 | ||
e142c38c | 1458 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1459 | struct dwarf2_cu **); |
9219021c | 1460 | |
f39c6ffd | 1461 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1462 | |
f39c6ffd | 1463 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1464 | |
f39c6ffd | 1465 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1466 | |
a121b7c1 | 1467 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1468 | |
f39c6ffd | 1469 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1470 | |
f9aca02d | 1471 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1472 | |
d97bc12b DE |
1473 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1474 | ||
1475 | static void dump_die_for_error (struct die_info *); | |
1476 | ||
1477 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1478 | struct die_info *); | |
c906108c | 1479 | |
d97bc12b | 1480 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1481 | |
51545339 | 1482 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1483 | struct dwarf2_cu *); |
c906108c | 1484 | |
ff39bb5e | 1485 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1486 | |
ff39bb5e | 1487 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1488 | |
348e048f | 1489 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1490 | const struct attribute *, |
348e048f DE |
1491 | struct dwarf2_cu **); |
1492 | ||
10b3939b | 1493 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1494 | const struct attribute *, |
f2f0e013 | 1495 | struct dwarf2_cu **); |
c906108c | 1496 | |
348e048f | 1497 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1498 | const struct attribute *, |
348e048f DE |
1499 | struct dwarf2_cu **); |
1500 | ||
ac9ec31b DE |
1501 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1502 | struct dwarf2_cu *); | |
1503 | ||
1504 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1505 | const struct attribute *, |
ac9ec31b DE |
1506 | struct dwarf2_cu *); |
1507 | ||
e5fe5e75 | 1508 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1509 | |
52dc124a | 1510 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1511 | |
63e43d3a PMR |
1512 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1513 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1514 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1515 | |
c906108c SS |
1516 | /* memory allocation interface */ |
1517 | ||
7b5a2f43 | 1518 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1519 | |
b60c80d6 | 1520 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1521 | |
43f3e411 | 1522 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1523 | |
8cf6f0b1 TT |
1524 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1525 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1526 | const struct attribute *attr); |
8cf6f0b1 | 1527 | |
ff39bb5e | 1528 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1529 | struct symbol *sym, |
f1e6e072 TT |
1530 | struct dwarf2_cu *cu, |
1531 | int is_block); | |
4c2df51b | 1532 | |
d521ce57 TT |
1533 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1534 | const gdb_byte *info_ptr, | |
1535 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1536 | |
72bf9492 DJ |
1537 | static hashval_t partial_die_hash (const void *item); |
1538 | ||
1539 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1540 | ||
ae038cb0 | 1541 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1542 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1543 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1544 | |
9816fde3 | 1545 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1546 | struct die_info *comp_unit_die, |
1547 | enum language pretend_language); | |
93311388 | 1548 | |
ed2dc618 | 1549 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1550 | |
dee91e82 | 1551 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1552 | |
f792889a DJ |
1553 | static struct type *set_die_type (struct die_info *, struct type *, |
1554 | struct dwarf2_cu *); | |
1c379e20 | 1555 | |
ed2dc618 | 1556 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1557 | |
ed2dc618 | 1558 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1559 | |
58f0c718 | 1560 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1561 | enum language); |
10b3939b | 1562 | |
95554aad TT |
1563 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1564 | enum language); | |
10b3939b | 1565 | |
f4dc4d17 DE |
1566 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1567 | enum language); | |
1568 | ||
10b3939b DJ |
1569 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1570 | struct dwarf2_per_cu_data *); | |
1571 | ||
ae038cb0 DJ |
1572 | static void dwarf2_mark (struct dwarf2_cu *); |
1573 | ||
1574 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1575 | ||
b64f50a1 | 1576 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1577 | struct dwarf2_per_cu_data *); |
673bfd45 | 1578 | |
f792889a | 1579 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1580 | |
95554aad TT |
1581 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1582 | enum language pretend_language); | |
1583 | ||
ed2dc618 | 1584 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1585 | |
b303c6f6 AB |
1586 | /* Class, the destructor of which frees all allocated queue entries. This |
1587 | will only have work to do if an error was thrown while processing the | |
1588 | dwarf. If no error was thrown then the queue entries should have all | |
1589 | been processed, and freed, as we went along. */ | |
1590 | ||
1591 | class dwarf2_queue_guard | |
1592 | { | |
1593 | public: | |
39856def TT |
1594 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
1595 | : m_per_objfile (per_objfile) | |
1596 | { | |
1597 | } | |
b303c6f6 AB |
1598 | |
1599 | /* Free any entries remaining on the queue. There should only be | |
1600 | entries left if we hit an error while processing the dwarf. */ | |
1601 | ~dwarf2_queue_guard () | |
1602 | { | |
39856def TT |
1603 | /* Ensure that no memory is allocated by the queue. */ |
1604 | std::queue<dwarf2_queue_item> empty; | |
1605 | std::swap (m_per_objfile->queue, empty); | |
1606 | } | |
b303c6f6 | 1607 | |
39856def | 1608 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
b303c6f6 | 1609 | |
39856def TT |
1610 | private: |
1611 | dwarf2_per_objfile *m_per_objfile; | |
b303c6f6 AB |
1612 | }; |
1613 | ||
39856def TT |
1614 | dwarf2_queue_item::~dwarf2_queue_item () |
1615 | { | |
1616 | /* Anything still marked queued is likely to be in an | |
1617 | inconsistent state, so discard it. */ | |
1618 | if (per_cu->queued) | |
1619 | { | |
1620 | if (per_cu->cu != NULL) | |
1621 | free_one_cached_comp_unit (per_cu); | |
1622 | per_cu->queued = 0; | |
1623 | } | |
1624 | } | |
1625 | ||
d721ba37 PA |
1626 | /* The return type of find_file_and_directory. Note, the enclosed |
1627 | string pointers are only valid while this object is valid. */ | |
1628 | ||
1629 | struct file_and_directory | |
1630 | { | |
1631 | /* The filename. This is never NULL. */ | |
1632 | const char *name; | |
1633 | ||
1634 | /* The compilation directory. NULL if not known. If we needed to | |
1635 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1636 | points directly to the DW_AT_comp_dir string attribute owned by | |
1637 | the obstack that owns the DIE. */ | |
1638 | const char *comp_dir; | |
1639 | ||
1640 | /* If we needed to build a new string for comp_dir, this is what | |
1641 | owns the storage. */ | |
1642 | std::string comp_dir_storage; | |
1643 | }; | |
1644 | ||
1645 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1646 | struct dwarf2_cu *cu); | |
9291a0cd | 1647 | |
298e9637 | 1648 | static htab_up allocate_signatured_type_table (); |
1fd400ff | 1649 | |
298e9637 | 1650 | static htab_up allocate_dwo_unit_table (); |
3019eac3 | 1651 | |
57d63ce2 | 1652 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1653 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1654 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1655 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1656 | |
ed2dc618 SM |
1657 | static struct dwp_file *get_dwp_file |
1658 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1659 | |
3019eac3 | 1660 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1661 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1662 | |
1663 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1664 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1665 | |
89e63ee4 DE |
1666 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1667 | ||
263db9a1 TT |
1668 | /* A unique pointer to a dwo_file. */ |
1669 | ||
51ac9db5 | 1670 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 1671 | |
ed2dc618 | 1672 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 1673 | |
1b80a9fa | 1674 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1675 | |
1676 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1677 | \f |
1678 | /* Various complaints about symbol reading that don't abort the process. */ | |
1679 | ||
1680 | static void | |
1681 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1682 | { | |
b98664d3 | 1683 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
1684 | } |
1685 | ||
1686 | static void | |
1687 | dwarf2_debug_line_missing_file_complaint (void) | |
1688 | { | |
b98664d3 | 1689 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1690 | } |
1691 | ||
1692 | static void | |
1693 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1694 | { | |
b98664d3 | 1695 | complaint (_(".debug_line section has line " |
4390d890 DE |
1696 | "program sequence without an end")); |
1697 | } | |
1698 | ||
1699 | static void | |
1700 | dwarf2_complex_location_expr_complaint (void) | |
1701 | { | |
b98664d3 | 1702 | complaint (_("location expression too complex")); |
4390d890 DE |
1703 | } |
1704 | ||
1705 | static void | |
1706 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1707 | int arg3) | |
1708 | { | |
b98664d3 | 1709 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1710 | arg1, arg2, arg3); |
1711 | } | |
1712 | ||
1713 | static void | |
1714 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1715 | { | |
b98664d3 | 1716 | complaint (_("debug info runs off end of %s section" |
4390d890 | 1717 | " [in module %s]"), |
96b79293 TT |
1718 | section->get_name (), |
1719 | section->get_file_name ()); | |
4390d890 | 1720 | } |
1b80a9fa | 1721 | |
4390d890 DE |
1722 | static void |
1723 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1724 | { | |
b98664d3 | 1725 | complaint (_("macro debug info contains a " |
4390d890 DE |
1726 | "malformed macro definition:\n`%s'"), |
1727 | arg1); | |
1728 | } | |
1729 | ||
1730 | static void | |
1731 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1732 | { | |
b98664d3 | 1733 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1734 | arg1, arg2); |
1735 | } | |
527f3840 JK |
1736 | |
1737 | /* Hash function for line_header_hash. */ | |
1738 | ||
1739 | static hashval_t | |
1740 | line_header_hash (const struct line_header *ofs) | |
1741 | { | |
9c541725 | 1742 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1743 | } |
1744 | ||
1745 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1746 | ||
1747 | static hashval_t | |
1748 | line_header_hash_voidp (const void *item) | |
1749 | { | |
9a3c8263 | 1750 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1751 | |
1752 | return line_header_hash (ofs); | |
1753 | } | |
1754 | ||
1755 | /* Equality function for line_header_hash. */ | |
1756 | ||
1757 | static int | |
1758 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1759 | { | |
9a3c8263 SM |
1760 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1761 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1762 | |
9c541725 | 1763 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1764 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1765 | } | |
1766 | ||
4390d890 | 1767 | \f |
9291a0cd | 1768 | |
330cdd98 PA |
1769 | /* See declaration. */ |
1770 | ||
1771 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
1772 | const dwarf2_debug_sections *names, |
1773 | bool can_copy_) | |
1774 | : objfile (objfile_), | |
1775 | can_copy (can_copy_) | |
330cdd98 PA |
1776 | { |
1777 | if (names == NULL) | |
1778 | names = &dwarf2_elf_names; | |
1779 | ||
1780 | bfd *obfd = objfile->obfd; | |
1781 | ||
1782 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
1783 | locate_sections (obfd, sec, *names); | |
1784 | } | |
1785 | ||
1786 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
1787 | { | |
1788 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
1789 | free_cached_comp_units (); | |
1790 | ||
b76e467d | 1791 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
ae640021 | 1792 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1793 | |
b2bdb8cf | 1794 | for (signatured_type *sig_type : all_type_units) |
ae640021 | 1795 | sig_type->per_cu.imported_symtabs_free (); |
fc8e7e75 | 1796 | |
330cdd98 PA |
1797 | /* Everything else should be on the objfile obstack. */ |
1798 | } | |
1799 | ||
1800 | /* See declaration. */ | |
1801 | ||
1802 | void | |
1803 | dwarf2_per_objfile::free_cached_comp_units () | |
1804 | { | |
1805 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
1806 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
1807 | while (per_cu != NULL) | |
1808 | { | |
1809 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
1810 | ||
fcd3b13d | 1811 | delete per_cu->cu; |
330cdd98 PA |
1812 | *last_chain = next_cu; |
1813 | per_cu = next_cu; | |
1814 | } | |
1815 | } | |
1816 | ||
11ed8cad TT |
1817 | /* A helper class that calls free_cached_comp_units on |
1818 | destruction. */ | |
1819 | ||
1820 | class free_cached_comp_units | |
1821 | { | |
1822 | public: | |
1823 | ||
1824 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1825 | : m_per_objfile (per_objfile) | |
1826 | { | |
1827 | } | |
1828 | ||
1829 | ~free_cached_comp_units () | |
1830 | { | |
1831 | m_per_objfile->free_cached_comp_units (); | |
1832 | } | |
1833 | ||
1834 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1835 | ||
1836 | private: | |
1837 | ||
1838 | dwarf2_per_objfile *m_per_objfile; | |
1839 | }; | |
1840 | ||
c906108c | 1841 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1842 | information and return true if we have enough to do something. |
1843 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1844 | ELF names are used. CAN_COPY is true for formats where symbol |
1845 | interposition is possible and so symbol values must follow copy | |
1846 | relocation rules. */ | |
c906108c SS |
1847 | |
1848 | int | |
251d32d9 | 1849 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
1850 | const struct dwarf2_debug_sections *names, |
1851 | bool can_copy) | |
c906108c | 1852 | { |
97cbe998 SDJ |
1853 | if (objfile->flags & OBJF_READNEVER) |
1854 | return 0; | |
1855 | ||
ed2dc618 SM |
1856 | struct dwarf2_per_objfile *dwarf2_per_objfile |
1857 | = get_dwarf2_per_objfile (objfile); | |
1858 | ||
1859 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 1860 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
1861 | names, |
1862 | can_copy); | |
5bfd760d | 1863 | |
73869dc2 | 1864 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 1865 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 1866 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 1867 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
1868 | } |
1869 | ||
251d32d9 TG |
1870 | /* When loading sections, we look either for uncompressed section or for |
1871 | compressed section names. */ | |
233a11ab CS |
1872 | |
1873 | static int | |
251d32d9 TG |
1874 | section_is_p (const char *section_name, |
1875 | const struct dwarf2_section_names *names) | |
233a11ab | 1876 | { |
251d32d9 TG |
1877 | if (names->normal != NULL |
1878 | && strcmp (section_name, names->normal) == 0) | |
1879 | return 1; | |
1880 | if (names->compressed != NULL | |
1881 | && strcmp (section_name, names->compressed) == 0) | |
1882 | return 1; | |
1883 | return 0; | |
233a11ab CS |
1884 | } |
1885 | ||
330cdd98 | 1886 | /* See declaration. */ |
c906108c | 1887 | |
330cdd98 PA |
1888 | void |
1889 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
1890 | const dwarf2_debug_sections &names) | |
c906108c | 1891 | { |
fd361982 | 1892 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1893 | |
dc7650b8 JK |
1894 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1895 | { | |
1896 | } | |
950b7495 KS |
1897 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1898 | > bfd_get_file_size (abfd)) | |
1899 | { | |
1900 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1901 | warning (_("Discarding section %s which has a section size (%s" | |
1902 | ") larger than the file size [in module %s]"), | |
1903 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1904 | bfd_get_filename (abfd)); | |
1905 | } | |
330cdd98 | 1906 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 1907 | { |
330cdd98 | 1908 | this->info.s.section = sectp; |
fd361982 | 1909 | this->info.size = bfd_section_size (sectp); |
c906108c | 1910 | } |
330cdd98 | 1911 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 1912 | { |
330cdd98 | 1913 | this->abbrev.s.section = sectp; |
fd361982 | 1914 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1915 | } |
330cdd98 | 1916 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 1917 | { |
330cdd98 | 1918 | this->line.s.section = sectp; |
fd361982 | 1919 | this->line.size = bfd_section_size (sectp); |
c906108c | 1920 | } |
330cdd98 | 1921 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 1922 | { |
330cdd98 | 1923 | this->loc.s.section = sectp; |
fd361982 | 1924 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1925 | } |
330cdd98 | 1926 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 1927 | { |
330cdd98 | 1928 | this->loclists.s.section = sectp; |
fd361982 | 1929 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1930 | } |
330cdd98 | 1931 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 1932 | { |
330cdd98 | 1933 | this->macinfo.s.section = sectp; |
fd361982 | 1934 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1935 | } |
330cdd98 | 1936 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 1937 | { |
330cdd98 | 1938 | this->macro.s.section = sectp; |
fd361982 | 1939 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1940 | } |
330cdd98 | 1941 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 1942 | { |
330cdd98 | 1943 | this->str.s.section = sectp; |
fd361982 | 1944 | this->str.size = bfd_section_size (sectp); |
c906108c | 1945 | } |
18a8505e AT |
1946 | else if (section_is_p (sectp->name, &names.str_offsets)) |
1947 | { | |
1948 | this->str_offsets.s.section = sectp; | |
1949 | this->str_offsets.size = bfd_section_size (sectp); | |
1950 | } | |
330cdd98 | 1951 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 1952 | { |
330cdd98 | 1953 | this->line_str.s.section = sectp; |
fd361982 | 1954 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1955 | } |
330cdd98 | 1956 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 1957 | { |
330cdd98 | 1958 | this->addr.s.section = sectp; |
fd361982 | 1959 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1960 | } |
330cdd98 | 1961 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 1962 | { |
330cdd98 | 1963 | this->frame.s.section = sectp; |
fd361982 | 1964 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1965 | } |
330cdd98 | 1966 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 1967 | { |
330cdd98 | 1968 | this->eh_frame.s.section = sectp; |
fd361982 | 1969 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1970 | } |
330cdd98 | 1971 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 1972 | { |
330cdd98 | 1973 | this->ranges.s.section = sectp; |
fd361982 | 1974 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1975 | } |
330cdd98 | 1976 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 1977 | { |
330cdd98 | 1978 | this->rnglists.s.section = sectp; |
fd361982 | 1979 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1980 | } |
330cdd98 | 1981 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 1982 | { |
8b70b953 TT |
1983 | struct dwarf2_section_info type_section; |
1984 | ||
1985 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1986 | type_section.s.section = sectp; |
fd361982 | 1987 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1988 | |
fd5866f6 | 1989 | this->types.push_back (type_section); |
348e048f | 1990 | } |
330cdd98 | 1991 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 1992 | { |
330cdd98 | 1993 | this->gdb_index.s.section = sectp; |
fd361982 | 1994 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1995 | } |
927aa2e7 JK |
1996 | else if (section_is_p (sectp->name, &names.debug_names)) |
1997 | { | |
1998 | this->debug_names.s.section = sectp; | |
fd361982 | 1999 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
2000 | } |
2001 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2002 | { | |
2003 | this->debug_aranges.s.section = sectp; | |
fd361982 | 2004 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 2005 | } |
dce234bc | 2006 | |
fd361982 AM |
2007 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
2008 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 2009 | this->has_section_at_zero = true; |
c906108c SS |
2010 | } |
2011 | ||
dce234bc | 2012 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2013 | SECTION_NAME. */ |
af34e669 | 2014 | |
dce234bc | 2015 | void |
3017a003 TG |
2016 | dwarf2_get_section_info (struct objfile *objfile, |
2017 | enum dwarf2_section_enum sect, | |
d521ce57 | 2018 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2019 | bfd_size_type *sizep) |
2020 | { | |
5bfd760d | 2021 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2022 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2023 | |
2024 | /* We may see an objfile without any DWARF, in which case we just | |
2025 | return nothing. */ | |
2026 | if (data == NULL) | |
2027 | { | |
2028 | *sectp = NULL; | |
2029 | *bufp = NULL; | |
2030 | *sizep = 0; | |
2031 | return; | |
2032 | } | |
3017a003 TG |
2033 | switch (sect) |
2034 | { | |
2035 | case DWARF2_DEBUG_FRAME: | |
2036 | info = &data->frame; | |
2037 | break; | |
2038 | case DWARF2_EH_FRAME: | |
2039 | info = &data->eh_frame; | |
2040 | break; | |
2041 | default: | |
2042 | gdb_assert_not_reached ("unexpected section"); | |
2043 | } | |
dce234bc | 2044 | |
96b79293 | 2045 | info->read (objfile); |
dce234bc | 2046 | |
96b79293 | 2047 | *sectp = info->get_bfd_section (); |
dce234bc PP |
2048 | *bufp = info->buffer; |
2049 | *sizep = info->size; | |
2050 | } | |
2051 | ||
36586728 TT |
2052 | /* A helper function to find the sections for a .dwz file. */ |
2053 | ||
2054 | static void | |
2055 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2056 | { | |
9a3c8263 | 2057 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2058 | |
2059 | /* Note that we only support the standard ELF names, because .dwz | |
2060 | is ELF-only (at the time of writing). */ | |
2061 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2062 | { | |
049412e3 | 2063 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2064 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2065 | } |
2066 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2067 | { | |
049412e3 | 2068 | dwz_file->info.s.section = sectp; |
fd361982 | 2069 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2070 | } |
2071 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2072 | { | |
049412e3 | 2073 | dwz_file->str.s.section = sectp; |
fd361982 | 2074 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2075 | } |
2076 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2077 | { | |
049412e3 | 2078 | dwz_file->line.s.section = sectp; |
fd361982 | 2079 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2080 | } |
2081 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2082 | { | |
049412e3 | 2083 | dwz_file->macro.s.section = sectp; |
fd361982 | 2084 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2085 | } |
2ec9a5e0 TT |
2086 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2087 | { | |
049412e3 | 2088 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2089 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2090 | } |
927aa2e7 JK |
2091 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2092 | { | |
2093 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2094 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2095 | } |
36586728 TT |
2096 | } |
2097 | ||
c4973306 | 2098 | /* See dwarf2read.h. */ |
36586728 | 2099 | |
c4973306 | 2100 | struct dwz_file * |
ed2dc618 | 2101 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2102 | { |
36586728 | 2103 | const char *filename; |
acd13123 | 2104 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2105 | size_t buildid_len; |
2106 | bfd_byte *buildid; | |
36586728 TT |
2107 | |
2108 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2109 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2110 | |
4db1a1dc | 2111 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2112 | gdb::unique_xmalloc_ptr<char> data |
2113 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2114 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2115 | if (data == NULL) |
2116 | { | |
2117 | if (bfd_get_error () == bfd_error_no_error) | |
2118 | return NULL; | |
2119 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2120 | bfd_errmsg (bfd_get_error ())); | |
2121 | } | |
791afaa2 TT |
2122 | |
2123 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2124 | |
acd13123 TT |
2125 | buildid_len = (size_t) buildid_len_arg; |
2126 | ||
791afaa2 | 2127 | filename = data.get (); |
d721ba37 PA |
2128 | |
2129 | std::string abs_storage; | |
36586728 TT |
2130 | if (!IS_ABSOLUTE_PATH (filename)) |
2131 | { | |
14278e1f TT |
2132 | gdb::unique_xmalloc_ptr<char> abs |
2133 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2134 | |
14278e1f | 2135 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2136 | filename = abs_storage.c_str (); |
36586728 TT |
2137 | } |
2138 | ||
dc294be5 TT |
2139 | /* First try the file name given in the section. If that doesn't |
2140 | work, try to use the build-id instead. */ | |
192b62ce | 2141 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2142 | if (dwz_bfd != NULL) |
36586728 | 2143 | { |
192b62ce | 2144 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2145 | dwz_bfd.reset (nullptr); |
36586728 TT |
2146 | } |
2147 | ||
dc294be5 TT |
2148 | if (dwz_bfd == NULL) |
2149 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2150 | ||
0d79cdc4 AM |
2151 | if (dwz_bfd == nullptr) |
2152 | { | |
2153 | gdb::unique_xmalloc_ptr<char> alt_filename; | |
2154 | const char *origname = dwarf2_per_objfile->objfile->original_name; | |
2155 | ||
2156 | scoped_fd fd (debuginfod_debuginfo_query (buildid, | |
2157 | buildid_len, | |
2158 | origname, | |
2159 | &alt_filename)); | |
2160 | ||
2161 | if (fd.get () >= 0) | |
2162 | { | |
2163 | /* File successfully retrieved from server. */ | |
2164 | dwz_bfd = gdb_bfd_open (alt_filename.get (), gnutarget, -1); | |
2165 | ||
2166 | if (dwz_bfd == nullptr) | |
2167 | warning (_("File \"%s\" from debuginfod cannot be opened as bfd"), | |
2168 | alt_filename.get ()); | |
2169 | else if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) | |
2170 | dwz_bfd.reset (nullptr); | |
2171 | } | |
2172 | } | |
2173 | ||
dc294be5 TT |
2174 | if (dwz_bfd == NULL) |
2175 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2176 | objfile_name (dwarf2_per_objfile->objfile)); | |
2177 | ||
7ff8cb8c TT |
2178 | std::unique_ptr<struct dwz_file> result |
2179 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2180 | |
7ff8cb8c TT |
2181 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2182 | result.get ()); | |
36586728 | 2183 | |
7ff8cb8c TT |
2184 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2185 | result->dwz_bfd.get ()); | |
2186 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2187 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2188 | } |
9291a0cd | 2189 | \f |
7b9f3c50 DE |
2190 | /* DWARF quick_symbols_functions support. */ |
2191 | ||
2192 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2193 | unique line tables, so we maintain a separate table of all .debug_line | |
2194 | derived entries to support the sharing. | |
2195 | All the quick functions need is the list of file names. We discard the | |
2196 | line_header when we're done and don't need to record it here. */ | |
2197 | struct quick_file_names | |
2198 | { | |
094b34ac DE |
2199 | /* The data used to construct the hash key. */ |
2200 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2201 | |
2202 | /* The number of entries in file_names, real_names. */ | |
2203 | unsigned int num_file_names; | |
2204 | ||
2205 | /* The file names from the line table, after being run through | |
2206 | file_full_name. */ | |
2207 | const char **file_names; | |
2208 | ||
2209 | /* The file names from the line table after being run through | |
2210 | gdb_realpath. These are computed lazily. */ | |
2211 | const char **real_names; | |
2212 | }; | |
2213 | ||
2214 | /* When using the index (and thus not using psymtabs), each CU has an | |
2215 | object of this type. This is used to hold information needed by | |
2216 | the various "quick" methods. */ | |
2217 | struct dwarf2_per_cu_quick_data | |
2218 | { | |
2219 | /* The file table. This can be NULL if there was no file table | |
2220 | or it's currently not read in. | |
2221 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2222 | struct quick_file_names *file_names; | |
2223 | ||
2224 | /* The corresponding symbol table. This is NULL if symbols for this | |
2225 | CU have not yet been read. */ | |
43f3e411 | 2226 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2227 | |
2228 | /* A temporary mark bit used when iterating over all CUs in | |
2229 | expand_symtabs_matching. */ | |
2230 | unsigned int mark : 1; | |
2231 | ||
2232 | /* True if we've tried to read the file table and found there isn't one. | |
2233 | There will be no point in trying to read it again next time. */ | |
2234 | unsigned int no_file_data : 1; | |
2235 | }; | |
2236 | ||
094b34ac DE |
2237 | /* Utility hash function for a stmt_list_hash. */ |
2238 | ||
2239 | static hashval_t | |
2240 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2241 | { | |
2242 | hashval_t v = 0; | |
2243 | ||
2244 | if (stmt_list_hash->dwo_unit != NULL) | |
2245 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2246 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2247 | return v; |
2248 | } | |
2249 | ||
2250 | /* Utility equality function for a stmt_list_hash. */ | |
2251 | ||
2252 | static int | |
2253 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2254 | const struct stmt_list_hash *rhs) | |
2255 | { | |
2256 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2257 | return 0; | |
2258 | if (lhs->dwo_unit != NULL | |
2259 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2260 | return 0; | |
2261 | ||
9c541725 | 2262 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2263 | } |
2264 | ||
7b9f3c50 DE |
2265 | /* Hash function for a quick_file_names. */ |
2266 | ||
2267 | static hashval_t | |
2268 | hash_file_name_entry (const void *e) | |
2269 | { | |
9a3c8263 SM |
2270 | const struct quick_file_names *file_data |
2271 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2272 | |
094b34ac | 2273 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2274 | } |
2275 | ||
2276 | /* Equality function for a quick_file_names. */ | |
2277 | ||
2278 | static int | |
2279 | eq_file_name_entry (const void *a, const void *b) | |
2280 | { | |
9a3c8263 SM |
2281 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2282 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2283 | |
094b34ac | 2284 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2285 | } |
2286 | ||
2287 | /* Delete function for a quick_file_names. */ | |
2288 | ||
2289 | static void | |
2290 | delete_file_name_entry (void *e) | |
2291 | { | |
9a3c8263 | 2292 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2293 | int i; |
2294 | ||
2295 | for (i = 0; i < file_data->num_file_names; ++i) | |
2296 | { | |
2297 | xfree ((void*) file_data->file_names[i]); | |
2298 | if (file_data->real_names) | |
2299 | xfree ((void*) file_data->real_names[i]); | |
2300 | } | |
2301 | ||
2302 | /* The space for the struct itself lives on objfile_obstack, | |
2303 | so we don't free it here. */ | |
2304 | } | |
2305 | ||
2306 | /* Create a quick_file_names hash table. */ | |
2307 | ||
5895093f | 2308 | static htab_up |
7b9f3c50 DE |
2309 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2310 | { | |
5895093f TT |
2311 | return htab_up (htab_create_alloc (nr_initial_entries, |
2312 | hash_file_name_entry, eq_file_name_entry, | |
2313 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2314 | } |
9291a0cd | 2315 | |
918dd910 JK |
2316 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2317 | have to be created afterwards. You should call age_cached_comp_units after | |
2318 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2319 | ||
2320 | static void | |
58f0c718 | 2321 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2322 | { |
3019eac3 | 2323 | if (per_cu->is_debug_types) |
e5fe5e75 | 2324 | load_full_type_unit (per_cu); |
918dd910 | 2325 | else |
58f0c718 | 2326 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2327 | |
cc12ce38 DE |
2328 | if (per_cu->cu == NULL) |
2329 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2330 | |
2331 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2332 | } |
2333 | ||
a0f42c21 | 2334 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2335 | |
9291a0cd | 2336 | static void |
58f0c718 | 2337 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2338 | { |
ed2dc618 | 2339 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2340 | |
f4dc4d17 DE |
2341 | /* Skip type_unit_groups, reading the type units they contain |
2342 | is handled elsewhere. */ | |
197400e8 | 2343 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2344 | return; |
2345 | ||
b303c6f6 AB |
2346 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2347 | the queue. After this point we're guaranteed to leave this function | |
2348 | with the dwarf queue empty. */ | |
39856def | 2349 | dwarf2_queue_guard q_guard (dwarf2_per_objfile); |
9291a0cd | 2350 | |
95554aad | 2351 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2352 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2353 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2354 | { | |
2355 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2356 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2357 | |
2358 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2359 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2360 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2361 | if (!per_cu->is_debug_types | |
cc12ce38 | 2362 | && per_cu->cu != NULL |
89e63ee4 DE |
2363 | && per_cu->cu->dwo_unit != NULL |
2364 | && dwarf2_per_objfile->index_table != NULL | |
2365 | && dwarf2_per_objfile->index_table->version <= 7 | |
2366 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2367 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2368 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2369 | } |
9291a0cd | 2370 | |
ed2dc618 | 2371 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2372 | |
2373 | /* Age the cache, releasing compilation units that have not | |
2374 | been used recently. */ | |
ed2dc618 | 2375 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2376 | } |
2377 | ||
2378 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2379 | the objfile from which this CU came. Returns the resulting symbol | |
2380 | table. */ | |
2fdf6df6 | 2381 | |
43f3e411 | 2382 | static struct compunit_symtab * |
58f0c718 | 2383 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2384 | { |
ed2dc618 SM |
2385 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2386 | ||
95554aad | 2387 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2388 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2389 | { |
11ed8cad | 2390 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2391 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2392 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2393 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2394 | } |
f194fefb | 2395 | |
43f3e411 | 2396 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2397 | } |
2398 | ||
ff4c9fec | 2399 | /* See declaration. */ |
f4dc4d17 | 2400 | |
ff4c9fec SM |
2401 | dwarf2_per_cu_data * |
2402 | dwarf2_per_objfile::get_cutu (int index) | |
2403 | { | |
b76e467d | 2404 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2405 | { |
b76e467d | 2406 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2407 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2408 | return &this->all_type_units[index]->per_cu; |
2409 | } | |
f4dc4d17 | 2410 | |
ff4c9fec SM |
2411 | return this->all_comp_units[index]; |
2412 | } | |
f4dc4d17 | 2413 | |
ff4c9fec | 2414 | /* See declaration. */ |
2fdf6df6 | 2415 | |
ff4c9fec SM |
2416 | dwarf2_per_cu_data * |
2417 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2418 | { |
b76e467d | 2419 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2420 | |
ff4c9fec | 2421 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2422 | } |
2423 | ||
ff4c9fec | 2424 | /* See declaration. */ |
f4dc4d17 | 2425 | |
ff4c9fec SM |
2426 | signatured_type * |
2427 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2428 | { |
b2bdb8cf | 2429 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2430 | |
ff4c9fec | 2431 | return this->all_type_units[index]; |
1fd400ff TT |
2432 | } |
2433 | ||
4b514bc8 JK |
2434 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2435 | objfile_obstack, and constructed with the specified field | |
2436 | values. */ | |
2437 | ||
2438 | static dwarf2_per_cu_data * | |
ed2dc618 | 2439 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2440 | struct dwarf2_section_info *section, |
2441 | int is_dwz, | |
2442 | sect_offset sect_off, ULONGEST length) | |
2443 | { | |
ed2dc618 | 2444 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2445 | dwarf2_per_cu_data *the_cu |
2446 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2447 | struct dwarf2_per_cu_data); | |
2448 | the_cu->sect_off = sect_off; | |
2449 | the_cu->length = length; | |
e3b94546 | 2450 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2451 | the_cu->section = section; |
2452 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2453 | struct dwarf2_per_cu_quick_data); | |
2454 | the_cu->is_dwz = is_dwz; | |
2455 | return the_cu; | |
2456 | } | |
2457 | ||
2ec9a5e0 TT |
2458 | /* A helper for create_cus_from_index that handles a given list of |
2459 | CUs. */ | |
2fdf6df6 | 2460 | |
74a0d9f6 | 2461 | static void |
12359b5e | 2462 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2463 | const gdb_byte *cu_list, offset_type n_elements, |
2464 | struct dwarf2_section_info *section, | |
b76e467d | 2465 | int is_dwz) |
9291a0cd | 2466 | { |
12359b5e | 2467 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2468 | { |
74a0d9f6 | 2469 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2470 | |
2471 | sect_offset sect_off | |
2472 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2473 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2474 | cu_list += 2 * 8; |
2475 | ||
b76e467d | 2476 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2477 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2478 | sect_off, length); | |
b76e467d | 2479 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2480 | } |
9291a0cd TT |
2481 | } |
2482 | ||
2ec9a5e0 | 2483 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2484 | the CU objects for this objfile. */ |
2ec9a5e0 | 2485 | |
74a0d9f6 | 2486 | static void |
12359b5e | 2487 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2488 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2489 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2490 | { | |
b76e467d SM |
2491 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
2492 | dwarf2_per_objfile->all_comp_units.reserve | |
2493 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2494 | |
12359b5e | 2495 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 2496 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
2497 | |
2498 | if (dwz_elements == 0) | |
74a0d9f6 | 2499 | return; |
2ec9a5e0 | 2500 | |
12359b5e SM |
2501 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
2502 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 2503 | &dwz->info, 1); |
2ec9a5e0 TT |
2504 | } |
2505 | ||
1fd400ff | 2506 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2507 | |
74a0d9f6 | 2508 | static void |
12359b5e SM |
2509 | create_signatured_type_table_from_index |
2510 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
2511 | struct dwarf2_section_info *section, | |
2512 | const gdb_byte *bytes, | |
2513 | offset_type elements) | |
1fd400ff | 2514 | { |
12359b5e | 2515 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 2516 | |
b2bdb8cf SM |
2517 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2518 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 2519 | |
298e9637 | 2520 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2521 | |
12359b5e | 2522 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2523 | { |
52dc124a | 2524 | struct signatured_type *sig_type; |
9c541725 | 2525 | ULONGEST signature; |
1fd400ff | 2526 | void **slot; |
9c541725 | 2527 | cu_offset type_offset_in_tu; |
1fd400ff | 2528 | |
74a0d9f6 | 2529 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2530 | sect_offset sect_off |
2531 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2532 | type_offset_in_tu | |
2533 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2534 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2535 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2536 | bytes += 3 * 8; | |
2537 | ||
52dc124a | 2538 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2539 | struct signatured_type); |
52dc124a | 2540 | sig_type->signature = signature; |
9c541725 | 2541 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 2542 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 2543 | sig_type->per_cu.section = section; |
9c541725 | 2544 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 2545 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 2546 | sig_type->per_cu.v.quick |
1fd400ff TT |
2547 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2548 | struct dwarf2_per_cu_quick_data); | |
2549 | ||
b0b6a987 | 2550 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
52dc124a | 2551 | *slot = sig_type; |
1fd400ff | 2552 | |
b2bdb8cf | 2553 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
2554 | } |
2555 | ||
b0b6a987 | 2556 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2557 | } |
2558 | ||
927aa2e7 JK |
2559 | /* Create the signatured type hash table from .debug_names. */ |
2560 | ||
2561 | static void | |
2562 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 2563 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2564 | const mapped_debug_names &map, |
2565 | struct dwarf2_section_info *section, | |
2566 | struct dwarf2_section_info *abbrev_section) | |
2567 | { | |
ed2dc618 SM |
2568 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2569 | ||
96b79293 TT |
2570 | section->read (objfile); |
2571 | abbrev_section->read (objfile); | |
927aa2e7 | 2572 | |
b2bdb8cf SM |
2573 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2574 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 | 2575 | |
298e9637 | 2576 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2577 | |
2578 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2579 | { | |
2580 | struct signatured_type *sig_type; | |
927aa2e7 | 2581 | void **slot; |
927aa2e7 JK |
2582 | |
2583 | sect_offset sect_off | |
2584 | = (sect_offset) (extract_unsigned_integer | |
2585 | (map.tu_table_reordered + i * map.offset_size, | |
2586 | map.offset_size, | |
2587 | map.dwarf5_byte_order)); | |
2588 | ||
2589 | comp_unit_head cu_header; | |
ed2dc618 SM |
2590 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
2591 | abbrev_section, | |
927aa2e7 JK |
2592 | section->buffer + to_underlying (sect_off), |
2593 | rcuh_kind::TYPE); | |
2594 | ||
2595 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2596 | struct signatured_type); | |
2597 | sig_type->signature = cu_header.signature; | |
2598 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
2599 | sig_type->per_cu.is_debug_types = 1; | |
2600 | sig_type->per_cu.section = section; | |
2601 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 2602 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
2603 | sig_type->per_cu.v.quick |
2604 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2605 | struct dwarf2_per_cu_quick_data); | |
2606 | ||
b0b6a987 | 2607 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
927aa2e7 JK |
2608 | *slot = sig_type; |
2609 | ||
b2bdb8cf | 2610 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
2611 | } |
2612 | ||
b0b6a987 | 2613 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2614 | } |
2615 | ||
9291a0cd TT |
2616 | /* Read the address map data from the mapped index, and use it to |
2617 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2618 | |
9291a0cd | 2619 | static void |
ed2dc618 SM |
2620 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2621 | struct mapped_index *index) | |
9291a0cd | 2622 | { |
ed2dc618 | 2623 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 2624 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 2625 | const gdb_byte *iter, *end; |
9291a0cd | 2626 | struct addrmap *mutable_map; |
9291a0cd TT |
2627 | CORE_ADDR baseaddr; |
2628 | ||
8268c778 PA |
2629 | auto_obstack temp_obstack; |
2630 | ||
9291a0cd TT |
2631 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2632 | ||
f00a2de2 PA |
2633 | iter = index->address_table.data (); |
2634 | end = iter + index->address_table.size (); | |
9291a0cd | 2635 | |
b3b3bada | 2636 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2637 | |
2638 | while (iter < end) | |
2639 | { | |
2640 | ULONGEST hi, lo, cu_index; | |
2641 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2642 | iter += 8; | |
2643 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2644 | iter += 8; | |
2645 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2646 | iter += 4; | |
f652bce2 | 2647 | |
24a55014 | 2648 | if (lo > hi) |
f652bce2 | 2649 | { |
b98664d3 | 2650 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2651 | hex_string (lo), hex_string (hi)); |
24a55014 | 2652 | continue; |
f652bce2 | 2653 | } |
24a55014 | 2654 | |
b76e467d | 2655 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 2656 | { |
b98664d3 | 2657 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2658 | (unsigned) cu_index); |
24a55014 | 2659 | continue; |
f652bce2 | 2660 | } |
24a55014 | 2661 | |
79748972 TT |
2662 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2663 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2664 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 2665 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
2666 | } |
2667 | ||
d320c2b5 | 2668 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2669 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
2670 | } |
2671 | ||
927aa2e7 JK |
2672 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
2673 | populate the objfile's psymtabs_addrmap. */ | |
2674 | ||
2675 | static void | |
ed2dc618 | 2676 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2677 | struct dwarf2_section_info *section) |
2678 | { | |
ed2dc618 | 2679 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
2680 | bfd *abfd = objfile->obfd; |
2681 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
b3b3bada | 2682 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
927aa2e7 JK |
2683 | |
2684 | auto_obstack temp_obstack; | |
2685 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2686 | ||
2687 | std::unordered_map<sect_offset, | |
2688 | dwarf2_per_cu_data *, | |
2689 | gdb::hash_enum<sect_offset>> | |
2690 | debug_info_offset_to_per_cu; | |
b76e467d | 2691 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 2692 | { |
927aa2e7 JK |
2693 | const auto insertpair |
2694 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
2695 | if (!insertpair.second) | |
2696 | { | |
2697 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2698 | "debug_info_offset %s, ignoring .debug_aranges."), |
2699 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2700 | return; |
2701 | } | |
2702 | } | |
2703 | ||
96b79293 | 2704 | section->read (objfile); |
927aa2e7 JK |
2705 | |
2706 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2707 | ||
2708 | const gdb_byte *addr = section->buffer; | |
2709 | ||
2710 | while (addr < section->buffer + section->size) | |
2711 | { | |
2712 | const gdb_byte *const entry_addr = addr; | |
2713 | unsigned int bytes_read; | |
2714 | ||
2715 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2716 | &bytes_read); | |
2717 | addr += bytes_read; | |
2718 | ||
2719 | const gdb_byte *const entry_end = addr + entry_length; | |
2720 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2721 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2722 | if (addr + entry_length > section->buffer + section->size) | |
2723 | { | |
47e3f474 | 2724 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2725 | "length %s exceeds section length %s, " |
2726 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2727 | objfile_name (objfile), |
2728 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2729 | plongest (bytes_read + entry_length), |
2730 | pulongest (section->size)); | |
2731 | return; | |
2732 | } | |
2733 | ||
2734 | /* The version number. */ | |
2735 | const uint16_t version = read_2_bytes (abfd, addr); | |
2736 | addr += 2; | |
2737 | if (version != 2) | |
2738 | { | |
47e3f474 | 2739 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2740 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2741 | objfile_name (objfile), |
2742 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2743 | return; |
2744 | } | |
2745 | ||
2746 | const uint64_t debug_info_offset | |
2747 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2748 | addr += offset_size; | |
2749 | const auto per_cu_it | |
2750 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2751 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2752 | { | |
47e3f474 | 2753 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2754 | "debug_info_offset %s does not exists, " |
2755 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2756 | objfile_name (objfile), |
2757 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2758 | pulongest (debug_info_offset)); |
2759 | return; | |
2760 | } | |
2761 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2762 | ||
2763 | const uint8_t address_size = *addr++; | |
2764 | if (address_size < 1 || address_size > 8) | |
2765 | { | |
47e3f474 | 2766 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2767 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2768 | objfile_name (objfile), |
2769 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2770 | return; |
2771 | } | |
2772 | ||
2773 | const uint8_t segment_selector_size = *addr++; | |
2774 | if (segment_selector_size != 0) | |
2775 | { | |
47e3f474 | 2776 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2777 | "segment_selector_size %u is not supported, " |
2778 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2779 | objfile_name (objfile), |
2780 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2781 | segment_selector_size); |
2782 | return; | |
2783 | } | |
2784 | ||
2785 | /* Must pad to an alignment boundary that is twice the address | |
2786 | size. It is undocumented by the DWARF standard but GCC does | |
2787 | use it. */ | |
2788 | for (size_t padding = ((-(addr - section->buffer)) | |
2789 | & (2 * address_size - 1)); | |
2790 | padding > 0; padding--) | |
2791 | if (*addr++ != 0) | |
2792 | { | |
47e3f474 | 2793 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2794 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2795 | objfile_name (objfile), |
2796 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2797 | return; |
2798 | } | |
2799 | ||
2800 | for (;;) | |
2801 | { | |
2802 | if (addr + 2 * address_size > entry_end) | |
2803 | { | |
47e3f474 | 2804 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2805 | "address list is not properly terminated, " |
2806 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2807 | objfile_name (objfile), |
2808 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2809 | return; |
2810 | } | |
2811 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2812 | dwarf5_byte_order); | |
2813 | addr += address_size; | |
2814 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2815 | dwarf5_byte_order); | |
2816 | addr += address_size; | |
2817 | if (start == 0 && length == 0) | |
2818 | break; | |
2819 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
2820 | { | |
2821 | /* Symbol was eliminated due to a COMDAT group. */ | |
2822 | continue; | |
2823 | } | |
2824 | ULONGEST end = start + length; | |
79748972 TT |
2825 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2826 | - baseaddr); | |
2827 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2828 | - baseaddr); | |
927aa2e7 JK |
2829 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2830 | } | |
2831 | } | |
2832 | ||
d320c2b5 | 2833 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2834 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
2835 | } |
2836 | ||
9291a0cd TT |
2837 | /* Find a slot in the mapped index INDEX for the object named NAME. |
2838 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
2839 | constant pool and return true. If NAME cannot be found, return |
2840 | false. */ | |
2fdf6df6 | 2841 | |
109483d9 | 2842 | static bool |
9291a0cd TT |
2843 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
2844 | offset_type **vec_out) | |
2845 | { | |
0cf03b49 | 2846 | offset_type hash; |
9291a0cd | 2847 | offset_type slot, step; |
559a7a62 | 2848 | int (*cmp) (const char *, const char *); |
9291a0cd | 2849 | |
791afaa2 | 2850 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 2851 | if (current_language->la_language == language_cplus |
45280282 IB |
2852 | || current_language->la_language == language_fortran |
2853 | || current_language->la_language == language_d) | |
0cf03b49 JK |
2854 | { |
2855 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2856 | not contain any. */ | |
a8719064 | 2857 | |
72998fb3 | 2858 | if (strchr (name, '(') != NULL) |
0cf03b49 | 2859 | { |
109483d9 | 2860 | without_params = cp_remove_params (name); |
0cf03b49 | 2861 | |
72998fb3 | 2862 | if (without_params != NULL) |
791afaa2 | 2863 | name = without_params.get (); |
0cf03b49 JK |
2864 | } |
2865 | } | |
2866 | ||
559a7a62 | 2867 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2868 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2869 | simulate our NAME being searched is also lowercased. */ |
2870 | hash = mapped_index_string_hash ((index->version == 4 | |
2871 | && case_sensitivity == case_sensitive_off | |
2872 | ? 5 : index->version), | |
2873 | name); | |
2874 | ||
f00a2de2 PA |
2875 | slot = hash & (index->symbol_table.size () - 1); |
2876 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 2877 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2878 | |
2879 | for (;;) | |
2880 | { | |
9291a0cd | 2881 | const char *str; |
f00a2de2 PA |
2882 | |
2883 | const auto &bucket = index->symbol_table[slot]; | |
2884 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 2885 | return false; |
9291a0cd | 2886 | |
f00a2de2 | 2887 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 2888 | if (!cmp (name, str)) |
9291a0cd TT |
2889 | { |
2890 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 2891 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 2892 | return true; |
9291a0cd TT |
2893 | } |
2894 | ||
f00a2de2 | 2895 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
2896 | } |
2897 | } | |
2898 | ||
4485a1c1 SM |
2899 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2900 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2901 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2902 | ok to use deprecated sections. |
2903 | ||
2904 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2905 | out parameters that are filled in with information about the CU and | |
2906 | TU lists in the section. | |
2907 | ||
4485a1c1 | 2908 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2909 | |
d33bc52e | 2910 | static bool |
4485a1c1 SM |
2911 | read_gdb_index_from_buffer (struct objfile *objfile, |
2912 | const char *filename, | |
2913 | bool deprecated_ok, | |
2914 | gdb::array_view<const gdb_byte> buffer, | |
2915 | struct mapped_index *map, | |
2916 | const gdb_byte **cu_list, | |
2917 | offset_type *cu_list_elements, | |
2918 | const gdb_byte **types_list, | |
2919 | offset_type *types_list_elements) | |
2920 | { | |
2921 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 2922 | |
9291a0cd | 2923 | /* Version check. */ |
4485a1c1 | 2924 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2925 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2926 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2927 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2928 | indices. */ |
831adc1f | 2929 | if (version < 4) |
481860b3 GB |
2930 | { |
2931 | static int warning_printed = 0; | |
2932 | if (!warning_printed) | |
2933 | { | |
2934 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2935 | filename); |
481860b3 GB |
2936 | warning_printed = 1; |
2937 | } | |
2938 | return 0; | |
2939 | } | |
2940 | /* Index version 4 uses a different hash function than index version | |
2941 | 5 and later. | |
2942 | ||
2943 | Versions earlier than 6 did not emit psymbols for inlined | |
2944 | functions. Using these files will cause GDB not to be able to | |
2945 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2946 | indices unless the user has done |
2947 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2948 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2949 | { |
2950 | static int warning_printed = 0; | |
2951 | if (!warning_printed) | |
2952 | { | |
e615022a DE |
2953 | warning (_("\ |
2954 | Skipping deprecated .gdb_index section in %s.\n\ | |
2955 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2956 | to use the section anyway."), | |
2ec9a5e0 | 2957 | filename); |
481860b3 GB |
2958 | warning_printed = 1; |
2959 | } | |
2960 | return 0; | |
2961 | } | |
796a7ff8 | 2962 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2963 | of the TU (for symbols coming from TUs), |
2964 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2965 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2966 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2967 | These are just performance bugs, and we can't distinguish gdb-generated | |
2968 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2969 | |
481860b3 | 2970 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2971 | longer backward compatible. */ |
796a7ff8 | 2972 | if (version > 8) |
594e8718 | 2973 | return 0; |
9291a0cd | 2974 | |
559a7a62 | 2975 | map->version = version; |
9291a0cd | 2976 | |
4485a1c1 | 2977 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 2978 | |
4485a1c1 | 2979 | int i = 0; |
2ec9a5e0 TT |
2980 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2981 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2982 | / 8); | |
1fd400ff TT |
2983 | ++i; |
2984 | ||
2ec9a5e0 TT |
2985 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2986 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2987 | - MAYBE_SWAP (metadata[i])) | |
2988 | / 8); | |
987d643c | 2989 | ++i; |
1fd400ff | 2990 | |
f00a2de2 PA |
2991 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
2992 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2993 | map->address_table | |
2994 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2995 | ++i; |
2996 | ||
f00a2de2 PA |
2997 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
2998 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2999 | map->symbol_table | |
3000 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3001 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3002 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3003 | |
f00a2de2 | 3004 | ++i; |
f9d83a0b | 3005 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3006 | |
2ec9a5e0 TT |
3007 | return 1; |
3008 | } | |
3009 | ||
4485a1c1 SM |
3010 | /* Callback types for dwarf2_read_gdb_index. */ |
3011 | ||
3012 | typedef gdb::function_view | |
3013 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
3014 | get_gdb_index_contents_ftype; | |
3015 | typedef gdb::function_view | |
3016 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
3017 | get_gdb_index_contents_dwz_ftype; | |
3018 | ||
927aa2e7 | 3019 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3020 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3021 | ||
3022 | static int | |
4485a1c1 SM |
3023 | dwarf2_read_gdb_index |
3024 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3025 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3026 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3027 | { |
2ec9a5e0 TT |
3028 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3029 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3030 | struct dwz_file *dwz; |
12359b5e | 3031 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3032 | |
4485a1c1 SM |
3033 | gdb::array_view<const gdb_byte> main_index_contents |
3034 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3035 | ||
3036 | if (main_index_contents.empty ()) | |
3037 | return 0; | |
3038 | ||
3063847f | 3039 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3040 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3041 | use_deprecated_index_sections, | |
3042 | main_index_contents, map.get (), &cu_list, | |
3043 | &cu_list_elements, &types_list, | |
3044 | &types_list_elements)) | |
2ec9a5e0 TT |
3045 | return 0; |
3046 | ||
0fefef59 | 3047 | /* Don't use the index if it's empty. */ |
3063847f | 3048 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3049 | return 0; |
3050 | ||
2ec9a5e0 TT |
3051 | /* If there is a .dwz file, read it so we can get its CU list as |
3052 | well. */ | |
ed2dc618 | 3053 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3054 | if (dwz != NULL) |
2ec9a5e0 | 3055 | { |
2ec9a5e0 TT |
3056 | struct mapped_index dwz_map; |
3057 | const gdb_byte *dwz_types_ignore; | |
3058 | offset_type dwz_types_elements_ignore; | |
3059 | ||
4485a1c1 SM |
3060 | gdb::array_view<const gdb_byte> dwz_index_content |
3061 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3062 | ||
3063 | if (dwz_index_content.empty ()) | |
3064 | return 0; | |
3065 | ||
3066 | if (!read_gdb_index_from_buffer (objfile, | |
00f93c44 AM |
3067 | bfd_get_filename (dwz->dwz_bfd.get ()), |
3068 | 1, dwz_index_content, &dwz_map, | |
4485a1c1 SM |
3069 | &dwz_list, &dwz_list_elements, |
3070 | &dwz_types_ignore, | |
3071 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3072 | { |
3073 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3074 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3075 | return 0; |
3076 | } | |
3077 | } | |
3078 | ||
12359b5e SM |
3079 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3080 | dwz_list, dwz_list_elements); | |
1fd400ff | 3081 | |
8b70b953 TT |
3082 | if (types_list_elements) |
3083 | { | |
8b70b953 TT |
3084 | /* We can only handle a single .debug_types when we have an |
3085 | index. */ | |
fd5866f6 | 3086 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3087 | return 0; |
3088 | ||
fd5866f6 | 3089 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3090 | |
12359b5e SM |
3091 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3092 | types_list, types_list_elements); | |
8b70b953 | 3093 | } |
9291a0cd | 3094 | |
3063847f | 3095 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3096 | |
3063847f | 3097 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3098 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3099 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3100 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3101 | |
3102 | return 1; | |
3103 | } | |
3104 | ||
dee91e82 | 3105 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3106 | |
dee91e82 DE |
3107 | static void |
3108 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3109 | const gdb_byte *info_ptr, |
3e225074 | 3110 | struct die_info *comp_unit_die) |
9291a0cd | 3111 | { |
dee91e82 | 3112 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3113 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3114 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3115 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3116 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3117 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3118 | struct attribute *attr; |
7b9f3c50 DE |
3119 | void **slot; |
3120 | struct quick_file_names *qfn; | |
9291a0cd | 3121 | |
0186c6a7 DE |
3122 | gdb_assert (! this_cu->is_debug_types); |
3123 | ||
07261596 TT |
3124 | /* Our callers never want to match partial units -- instead they |
3125 | will match the enclosing full CU. */ | |
3126 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3127 | { | |
3128 | this_cu->v.quick->no_file_data = 1; | |
3129 | return; | |
3130 | } | |
3131 | ||
0186c6a7 | 3132 | lh_cu = this_cu; |
7b9f3c50 | 3133 | slot = NULL; |
dee91e82 | 3134 | |
fff8551c | 3135 | line_header_up lh; |
9c541725 | 3136 | sect_offset line_offset {}; |
fff8551c | 3137 | |
dee91e82 | 3138 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
435d3d88 | 3139 | if (attr != nullptr) |
9291a0cd | 3140 | { |
7b9f3c50 DE |
3141 | struct quick_file_names find_entry; |
3142 | ||
9c541725 | 3143 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3144 | |
3145 | /* We may have already read in this line header (TU line header sharing). | |
3146 | If we have we're done. */ | |
094b34ac | 3147 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3148 | find_entry.hash.line_sect_off = line_offset; |
5895093f | 3149 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 DE |
3150 | &find_entry, INSERT); |
3151 | if (*slot != NULL) | |
3152 | { | |
9a3c8263 | 3153 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3154 | return; |
7b9f3c50 DE |
3155 | } |
3156 | ||
3019eac3 | 3157 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3158 | } |
3159 | if (lh == NULL) | |
3160 | { | |
094b34ac | 3161 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3162 | return; |
9291a0cd TT |
3163 | } |
3164 | ||
8d749320 | 3165 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3166 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3167 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3168 | gdb_assert (slot != NULL); |
3169 | *slot = qfn; | |
9291a0cd | 3170 | |
d721ba37 | 3171 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3172 | |
aa391654 TT |
3173 | int offset = 0; |
3174 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3175 | ++offset; | |
3176 | ||
7ba99d21 | 3177 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 3178 | qfn->file_names = |
aa391654 TT |
3179 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3180 | if (offset != 0) | |
3181 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 3182 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
3183 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
3184 | fnd.comp_dir).release (); | |
7b9f3c50 | 3185 | qfn->real_names = NULL; |
9291a0cd | 3186 | |
094b34ac | 3187 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3188 | } |
3189 | ||
3190 | /* A helper for the "quick" functions which attempts to read the line | |
3191 | table for THIS_CU. */ | |
3192 | ||
3193 | static struct quick_file_names * | |
e4a48d9d | 3194 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3195 | { |
0186c6a7 DE |
3196 | /* This should never be called for TUs. */ |
3197 | gdb_assert (! this_cu->is_debug_types); | |
3198 | /* Nor type unit groups. */ | |
197400e8 | 3199 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 3200 | |
dee91e82 DE |
3201 | if (this_cu->v.quick->file_names != NULL) |
3202 | return this_cu->v.quick->file_names; | |
3203 | /* If we know there is no line data, no point in looking again. */ | |
3204 | if (this_cu->v.quick->no_file_data) | |
3205 | return NULL; | |
3206 | ||
c0ab21c2 TT |
3207 | cutu_reader reader (this_cu); |
3208 | if (!reader.dummy_p) | |
3e225074 | 3209 | dw2_get_file_names_reader (&reader, reader.info_ptr, reader.comp_unit_die); |
dee91e82 DE |
3210 | |
3211 | if (this_cu->v.quick->no_file_data) | |
3212 | return NULL; | |
3213 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3214 | } |
3215 | ||
3216 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3217 | real path for a given file name from the line table. */ |
2fdf6df6 | 3218 | |
9291a0cd | 3219 | static const char * |
7b9f3c50 DE |
3220 | dw2_get_real_path (struct objfile *objfile, |
3221 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3222 | { |
7b9f3c50 DE |
3223 | if (qfn->real_names == NULL) |
3224 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3225 | qfn->num_file_names, const char *); |
9291a0cd | 3226 | |
7b9f3c50 | 3227 | if (qfn->real_names[index] == NULL) |
14278e1f | 3228 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3229 | |
7b9f3c50 | 3230 | return qfn->real_names[index]; |
9291a0cd TT |
3231 | } |
3232 | ||
3233 | static struct symtab * | |
3234 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3235 | { | |
ed2dc618 SM |
3236 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3237 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3238 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3239 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3240 | |
43f3e411 DE |
3241 | if (cust == NULL) |
3242 | return NULL; | |
ed2dc618 | 3243 | |
43f3e411 | 3244 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3245 | } |
3246 | ||
7b9f3c50 DE |
3247 | /* Traversal function for dw2_forget_cached_source_info. */ |
3248 | ||
3249 | static int | |
3250 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3251 | { |
7b9f3c50 | 3252 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3253 | |
7b9f3c50 | 3254 | if (file_data->real_names) |
9291a0cd | 3255 | { |
7b9f3c50 | 3256 | int i; |
9291a0cd | 3257 | |
7b9f3c50 | 3258 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3259 | { |
7b9f3c50 DE |
3260 | xfree ((void*) file_data->real_names[i]); |
3261 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3262 | } |
3263 | } | |
7b9f3c50 DE |
3264 | |
3265 | return 1; | |
3266 | } | |
3267 | ||
3268 | static void | |
3269 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3270 | { | |
ed2dc618 SM |
3271 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3272 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 | 3273 | |
5895093f | 3274 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 | 3275 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3276 | } |
3277 | ||
f8eba3c6 TT |
3278 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3279 | the symtabs and calls the iterator. */ | |
3280 | ||
3281 | static int | |
3282 | dw2_map_expand_apply (struct objfile *objfile, | |
3283 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3284 | const char *name, const char *real_path, |
14bc53a8 | 3285 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3286 | { |
43f3e411 | 3287 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3288 | |
3289 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3290 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3291 | return 0; |
3292 | ||
3293 | /* This may expand more than one symtab, and we want to iterate over | |
3294 | all of them. */ | |
58f0c718 | 3295 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3296 | |
14bc53a8 PA |
3297 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3298 | last_made, callback); | |
f8eba3c6 TT |
3299 | } |
3300 | ||
3301 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3302 | ||
14bc53a8 PA |
3303 | static bool |
3304 | dw2_map_symtabs_matching_filename | |
3305 | (struct objfile *objfile, const char *name, const char *real_path, | |
3306 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3307 | { |
c011a4f4 | 3308 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3309 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3310 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3311 | |
848e3e78 DE |
3312 | /* The rule is CUs specify all the files, including those used by |
3313 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3314 | |
b76e467d | 3315 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3316 | { |
3d7bb9d9 | 3317 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3318 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3319 | continue; |
3320 | ||
b76e467d | 3321 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3322 | if (file_data == NULL) |
9291a0cd TT |
3323 | continue; |
3324 | ||
b76e467d | 3325 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3326 | { |
7b9f3c50 | 3327 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3328 | const char *this_real_name; |
9291a0cd | 3329 | |
af529f8f | 3330 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3331 | { |
f5b95b50 | 3332 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3333 | callback)) |
3334 | return true; | |
288e77a7 | 3335 | continue; |
4aac40c8 | 3336 | } |
9291a0cd | 3337 | |
c011a4f4 DE |
3338 | /* Before we invoke realpath, which can get expensive when many |
3339 | files are involved, do a quick comparison of the basenames. */ | |
3340 | if (! basenames_may_differ | |
3341 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3342 | continue; | |
3343 | ||
da235a7c JK |
3344 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3345 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3346 | { |
da235a7c | 3347 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3348 | callback)) |
3349 | return true; | |
288e77a7 | 3350 | continue; |
da235a7c | 3351 | } |
9291a0cd | 3352 | |
da235a7c JK |
3353 | if (real_path != NULL) |
3354 | { | |
af529f8f JK |
3355 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3356 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3357 | if (this_real_name != NULL |
af529f8f | 3358 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3359 | { |
f5b95b50 | 3360 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3361 | callback)) |
3362 | return true; | |
288e77a7 | 3363 | continue; |
9291a0cd TT |
3364 | } |
3365 | } | |
3366 | } | |
3367 | } | |
3368 | ||
14bc53a8 | 3369 | return false; |
9291a0cd TT |
3370 | } |
3371 | ||
da51c347 DE |
3372 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3373 | ||
3374 | struct dw2_symtab_iterator | |
9291a0cd | 3375 | { |
ed2dc618 SM |
3376 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3377 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3378 | /* If set, only look for symbols that match that block. Valid values are |
3379 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3380 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3381 | /* The kind of symbol we're looking for. */ |
3382 | domain_enum domain; | |
3383 | /* The list of CUs from the index entry of the symbol, | |
3384 | or NULL if not found. */ | |
3385 | offset_type *vec; | |
3386 | /* The next element in VEC to look at. */ | |
3387 | int next; | |
3388 | /* The number of elements in VEC, or zero if there is no match. */ | |
3389 | int length; | |
8943b874 DE |
3390 | /* Have we seen a global version of the symbol? |
3391 | If so we can ignore all further global instances. | |
3392 | This is to work around gold/15646, inefficient gold-generated | |
3393 | indices. */ | |
3394 | int global_seen; | |
da51c347 | 3395 | }; |
9291a0cd | 3396 | |
2b79f376 | 3397 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3398 | |
9291a0cd | 3399 | static void |
da51c347 | 3400 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3401 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3402 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3403 | domain_enum domain, |
3404 | const char *name) | |
3405 | { | |
ed2dc618 | 3406 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3407 | iter->block_index = block_index; |
3408 | iter->domain = domain; | |
3409 | iter->next = 0; | |
8943b874 | 3410 | iter->global_seen = 0; |
da51c347 | 3411 | |
3063847f | 3412 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3413 | |
3414 | /* index is NULL if OBJF_READNOW. */ | |
3415 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3416 | iter->length = MAYBE_SWAP (*iter->vec); |
3417 | else | |
3418 | { | |
3419 | iter->vec = NULL; | |
3420 | iter->length = 0; | |
3421 | } | |
3422 | } | |
3423 | ||
3424 | /* Return the next matching CU or NULL if there are no more. */ | |
3425 | ||
3426 | static struct dwarf2_per_cu_data * | |
3427 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3428 | { | |
ed2dc618 SM |
3429 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3430 | ||
da51c347 DE |
3431 | for ( ; iter->next < iter->length; ++iter->next) |
3432 | { | |
3433 | offset_type cu_index_and_attrs = | |
3434 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3435 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3436 | gdb_index_symbol_kind symbol_kind = |
3437 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3438 | /* Only check the symbol attributes if they're present. | |
3439 | Indices prior to version 7 don't record them, | |
3440 | and indices >= 7 may elide them for certain symbols | |
3441 | (gold does this). */ | |
3442 | int attrs_valid = | |
ed2dc618 | 3443 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3444 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3445 | ||
3190f0c6 | 3446 | /* Don't crash on bad data. */ |
b76e467d | 3447 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3448 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3449 | { |
b98664d3 | 3450 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3451 | " [in module %s]"), |
3452 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3453 | continue; |
3454 | } | |
3455 | ||
ff4c9fec | 3456 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3457 | |
da51c347 | 3458 | /* Skip if already read in. */ |
43f3e411 | 3459 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3460 | continue; |
3461 | ||
8943b874 DE |
3462 | /* Check static vs global. */ |
3463 | if (attrs_valid) | |
3464 | { | |
2b79f376 SM |
3465 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3466 | ||
3467 | if (iter->block_index.has_value ()) | |
3468 | { | |
3469 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3470 | ||
3471 | if (is_static != want_static) | |
3472 | continue; | |
3473 | } | |
3474 | ||
8943b874 DE |
3475 | /* Work around gold/15646. */ |
3476 | if (!is_static && iter->global_seen) | |
3477 | continue; | |
3478 | if (!is_static) | |
3479 | iter->global_seen = 1; | |
3480 | } | |
da51c347 DE |
3481 | |
3482 | /* Only check the symbol's kind if it has one. */ | |
3483 | if (attrs_valid) | |
3484 | { | |
3485 | switch (iter->domain) | |
3486 | { | |
3487 | case VAR_DOMAIN: | |
3488 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3489 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3490 | /* Some types are also in VAR_DOMAIN. */ | |
3491 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3492 | continue; | |
3493 | break; | |
3494 | case STRUCT_DOMAIN: | |
3495 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3496 | continue; | |
3497 | break; | |
3498 | case LABEL_DOMAIN: | |
3499 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3500 | continue; | |
3501 | break; | |
59c35742 AB |
3502 | case MODULE_DOMAIN: |
3503 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3504 | continue; | |
3505 | break; | |
da51c347 DE |
3506 | default: |
3507 | break; | |
3508 | } | |
3509 | } | |
3510 | ||
3511 | ++iter->next; | |
3512 | return per_cu; | |
3513 | } | |
3514 | ||
3515 | return NULL; | |
3516 | } | |
3517 | ||
43f3e411 | 3518 | static struct compunit_symtab * |
c7f839cb | 3519 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 3520 | const char *name, domain_enum domain) |
9291a0cd | 3521 | { |
43f3e411 | 3522 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
3523 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3524 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 3525 | |
b5ec771e PA |
3526 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3527 | ||
ed2dc618 SM |
3528 | struct dw2_symtab_iterator iter; |
3529 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3530 | |
2b79f376 | 3531 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 3532 | |
ed2dc618 SM |
3533 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
3534 | { | |
3535 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 3536 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 3537 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 3538 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3539 | |
ed2dc618 SM |
3540 | sym = block_find_symbol (block, name, domain, |
3541 | block_find_non_opaque_type_preferred, | |
3542 | &with_opaque); | |
b2e2f908 | 3543 | |
ed2dc618 SM |
3544 | /* Some caution must be observed with overloaded functions |
3545 | and methods, since the index will not contain any overload | |
3546 | information (but NAME might contain it). */ | |
da51c347 | 3547 | |
ed2dc618 SM |
3548 | if (sym != NULL |
3549 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
3550 | return stab; | |
3551 | if (with_opaque != NULL | |
3552 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
3553 | stab_best = stab; | |
da51c347 | 3554 | |
ed2dc618 | 3555 | /* Keep looking through other CUs. */ |
9291a0cd | 3556 | } |
9291a0cd | 3557 | |
da51c347 | 3558 | return stab_best; |
9291a0cd TT |
3559 | } |
3560 | ||
3561 | static void | |
3562 | dw2_print_stats (struct objfile *objfile) | |
3563 | { | |
ed2dc618 SM |
3564 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3565 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3566 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3567 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 3568 | int count = 0; |
9291a0cd | 3569 | |
ed2dc618 | 3570 | for (int i = 0; i < total; ++i) |
9291a0cd | 3571 | { |
ff4c9fec | 3572 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3573 | |
43f3e411 | 3574 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3575 | ++count; |
3576 | } | |
e4a48d9d | 3577 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3578 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3579 | } | |
3580 | ||
779bd270 DE |
3581 | /* This dumps minimal information about the index. |
3582 | It is called via "mt print objfiles". | |
3583 | One use is to verify .gdb_index has been loaded by the | |
3584 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3585 | ||
9291a0cd TT |
3586 | static void |
3587 | dw2_dump (struct objfile *objfile) | |
3588 | { | |
ed2dc618 SM |
3589 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3590 | = get_dwarf2_per_objfile (objfile); | |
3591 | ||
779bd270 DE |
3592 | gdb_assert (dwarf2_per_objfile->using_index); |
3593 | printf_filtered (".gdb_index:"); | |
3594 | if (dwarf2_per_objfile->index_table != NULL) | |
3595 | { | |
3596 | printf_filtered (" version %d\n", | |
3597 | dwarf2_per_objfile->index_table->version); | |
3598 | } | |
3599 | else | |
3600 | printf_filtered (" faked for \"readnow\"\n"); | |
3601 | printf_filtered ("\n"); | |
9291a0cd TT |
3602 | } |
3603 | ||
9291a0cd TT |
3604 | static void |
3605 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3606 | const char *func_name) | |
3607 | { | |
ed2dc618 SM |
3608 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3609 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 3610 | |
ed2dc618 SM |
3611 | struct dw2_symtab_iterator iter; |
3612 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3613 | |
2b79f376 | 3614 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 3615 | |
ed2dc618 | 3616 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 3617 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 3618 | |
9291a0cd TT |
3619 | } |
3620 | ||
3621 | static void | |
3622 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3623 | { | |
ed2dc618 SM |
3624 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3625 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3626 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3627 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 3628 | |
ed2dc618 | 3629 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3630 | { |
ff4c9fec | 3631 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3632 | |
58f0c718 TT |
3633 | /* We don't want to directly expand a partial CU, because if we |
3634 | read it with the wrong language, then assertion failures can | |
3635 | be triggered later on. See PR symtab/23010. So, tell | |
3636 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3637 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
3638 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
3639 | } |
3640 | } | |
3641 | ||
3642 | static void | |
652a8996 JK |
3643 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3644 | const char *fullname) | |
9291a0cd | 3645 | { |
ed2dc618 SM |
3646 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3647 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
3648 | |
3649 | /* We don't need to consider type units here. | |
3650 | This is only called for examining code, e.g. expand_line_sal. | |
3651 | There can be an order of magnitude (or more) more type units | |
3652 | than comp units, and we avoid them if we can. */ | |
3653 | ||
b76e467d | 3654 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3655 | { |
3d7bb9d9 | 3656 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3657 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3658 | continue; |
3659 | ||
b76e467d | 3660 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3661 | if (file_data == NULL) |
9291a0cd TT |
3662 | continue; |
3663 | ||
b76e467d | 3664 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3665 | { |
652a8996 JK |
3666 | const char *this_fullname = file_data->file_names[j]; |
3667 | ||
3668 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3669 | { |
58f0c718 | 3670 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
3671 | break; |
3672 | } | |
3673 | } | |
3674 | } | |
3675 | } | |
3676 | ||
9291a0cd | 3677 | static void |
199b4314 TT |
3678 | dw2_map_matching_symbols |
3679 | (struct objfile *objfile, | |
b054970d | 3680 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
3681 | int global, |
3682 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 3683 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3684 | { |
40658b94 | 3685 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3686 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3687 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3688 | } |
3689 | ||
e1ef7d7a PA |
3690 | /* Starting from a search name, return the string that finds the upper |
3691 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3692 | list. Returns the empty string to indicate that the upper bound is | |
3693 | the end of the list. */ | |
3694 | ||
3695 | static std::string | |
3696 | make_sort_after_prefix_name (const char *search_name) | |
3697 | { | |
3698 | /* When looking to complete "func", we find the upper bound of all | |
3699 | symbols that start with "func" by looking for where we'd insert | |
3700 | the closest string that would follow "func" in lexicographical | |
3701 | order. Usually, that's "func"-with-last-character-incremented, | |
3702 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3703 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3704 | Especially mind the 0xff character, which is a valid character in | |
3705 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3706 | rule out compilers allowing it in identifiers. Note that | |
3707 | conveniently, strcmp/strcasecmp are specified to compare | |
3708 | characters interpreted as unsigned char. So what we do is treat | |
3709 | the whole string as a base 256 number composed of a sequence of | |
3710 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3711 | to 0, and carries 1 to the following more-significant position. | |
3712 | If the very first character in SEARCH_NAME ends up incremented | |
3713 | and carries/overflows, then the upper bound is the end of the | |
3714 | list. The string after the empty string is also the empty | |
3715 | string. | |
3716 | ||
3717 | Some examples of this operation: | |
3718 | ||
3719 | SEARCH_NAME => "+1" RESULT | |
3720 | ||
3721 | "abc" => "abd" | |
3722 | "ab\xff" => "ac" | |
3723 | "\xff" "a" "\xff" => "\xff" "b" | |
3724 | "\xff" => "" | |
3725 | "\xff\xff" => "" | |
3726 | "" => "" | |
3727 | ||
3728 | Then, with these symbols for example: | |
3729 | ||
3730 | func | |
3731 | func1 | |
3732 | fund | |
3733 | ||
3734 | completing "func" looks for symbols between "func" and | |
3735 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3736 | which finds "func" and "func1", but not "fund". | |
3737 | ||
3738 | And with: | |
3739 | ||
3740 | funcÿ (Latin1 'ÿ' [0xff]) | |
3741 | funcÿ1 | |
3742 | fund | |
3743 | ||
3744 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3745 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3746 | ||
3747 | And with: | |
3748 | ||
3749 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3750 | ÿÿ1 | |
3751 | ||
3752 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3753 | the end of the list. | |
3754 | */ | |
3755 | std::string after = search_name; | |
3756 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3757 | after.pop_back (); | |
3758 | if (!after.empty ()) | |
3759 | after.back () = (unsigned char) after.back () + 1; | |
3760 | return after; | |
3761 | } | |
3762 | ||
5c58de74 | 3763 | /* See declaration. */ |
61d96d7e | 3764 | |
5c58de74 PA |
3765 | std::pair<std::vector<name_component>::const_iterator, |
3766 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3767 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 3768 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 3769 | { |
5c58de74 PA |
3770 | auto *name_cmp |
3771 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3772 | |
3b00ef10 TT |
3773 | const char *lang_name |
3774 | = lookup_name_without_params.language_lookup_name (lang).c_str (); | |
9291a0cd | 3775 | |
3f563c84 PA |
3776 | /* Comparison function object for lower_bound that matches against a |
3777 | given symbol name. */ | |
3778 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3779 | const char *name) | |
3780 | { | |
5c58de74 | 3781 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3782 | const char *elem_name = elem_qualified + elem.name_offset; |
3783 | return name_cmp (elem_name, name) < 0; | |
3784 | }; | |
3785 | ||
3786 | /* Comparison function object for upper_bound that matches against a | |
3787 | given symbol name. */ | |
3788 | auto lookup_compare_upper = [&] (const char *name, | |
3789 | const name_component &elem) | |
3790 | { | |
5c58de74 | 3791 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3792 | const char *elem_name = elem_qualified + elem.name_offset; |
3793 | return name_cmp (name, elem_name) < 0; | |
3794 | }; | |
3795 | ||
5c58de74 PA |
3796 | auto begin = this->name_components.begin (); |
3797 | auto end = this->name_components.end (); | |
3f563c84 PA |
3798 | |
3799 | /* Find the lower bound. */ | |
3800 | auto lower = [&] () | |
3801 | { | |
3b00ef10 | 3802 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3803 | return begin; |
3804 | else | |
3b00ef10 | 3805 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3806 | } (); |
3807 | ||
3808 | /* Find the upper bound. */ | |
3809 | auto upper = [&] () | |
3810 | { | |
5c58de74 | 3811 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3812 | { |
e1ef7d7a PA |
3813 | /* In completion mode, we want UPPER to point past all |
3814 | symbols names that have the same prefix. I.e., with | |
3815 | these symbols, and completing "func": | |
3816 | ||
3817 | function << lower bound | |
3818 | function1 | |
3819 | other_function << upper bound | |
3820 | ||
3821 | We find the upper bound by looking for the insertion | |
3822 | point of "func"-with-last-character-incremented, | |
3823 | i.e. "fund". */ | |
3b00ef10 | 3824 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3825 | if (after.empty ()) |
3f563c84 | 3826 | return end; |
e6b2f5ef PA |
3827 | return std::lower_bound (lower, end, after.c_str (), |
3828 | lookup_compare_lower); | |
3f563c84 PA |
3829 | } |
3830 | else | |
3b00ef10 | 3831 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3832 | } (); |
3833 | ||
5c58de74 PA |
3834 | return {lower, upper}; |
3835 | } | |
3836 | ||
3837 | /* See declaration. */ | |
3838 | ||
3839 | void | |
44ed8f3e | 3840 | mapped_index_base::build_name_components () |
5c58de74 PA |
3841 | { |
3842 | if (!this->name_components.empty ()) | |
3843 | return; | |
3844 | ||
3845 | this->name_components_casing = case_sensitivity; | |
3846 | auto *name_cmp | |
3847 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3848 | ||
3849 | /* The code below only knows how to break apart components of C++ | |
3850 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3851 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3852 | auto count = this->symbol_name_count (); |
3853 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3854 | { |
44ed8f3e | 3855 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3856 | continue; |
3857 | ||
3858 | const char *name = this->symbol_name_at (idx); | |
3859 | ||
3860 | /* Add each name component to the name component table. */ | |
3861 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3862 | |
3863 | if (strstr (name, "::") != nullptr) | |
3864 | { | |
3865 | for (unsigned int current_len = cp_find_first_component (name); | |
3866 | name[current_len] != '\0'; | |
3867 | current_len += cp_find_first_component (name + current_len)) | |
3868 | { | |
3869 | gdb_assert (name[current_len] == ':'); | |
3870 | this->name_components.push_back ({previous_len, idx}); | |
3871 | /* Skip the '::'. */ | |
3872 | current_len += 2; | |
3873 | previous_len = current_len; | |
3874 | } | |
3875 | } | |
3876 | else | |
5c58de74 | 3877 | { |
3b00ef10 TT |
3878 | /* Handle the Ada encoded (aka mangled) form here. */ |
3879 | for (const char *iter = strstr (name, "__"); | |
3880 | iter != nullptr; | |
3881 | iter = strstr (iter, "__")) | |
3882 | { | |
3883 | this->name_components.push_back ({previous_len, idx}); | |
3884 | iter += 2; | |
3885 | previous_len = iter - name; | |
3886 | } | |
5c58de74 | 3887 | } |
3b00ef10 | 3888 | |
5c58de74 PA |
3889 | this->name_components.push_back ({previous_len, idx}); |
3890 | } | |
3891 | ||
3892 | /* Sort name_components elements by name. */ | |
3893 | auto name_comp_compare = [&] (const name_component &left, | |
3894 | const name_component &right) | |
3895 | { | |
3896 | const char *left_qualified = this->symbol_name_at (left.idx); | |
3897 | const char *right_qualified = this->symbol_name_at (right.idx); | |
3898 | ||
3899 | const char *left_name = left_qualified + left.name_offset; | |
3900 | const char *right_name = right_qualified + right.name_offset; | |
3901 | ||
3902 | return name_cmp (left_name, right_name) < 0; | |
3903 | }; | |
3904 | ||
3905 | std::sort (this->name_components.begin (), | |
3906 | this->name_components.end (), | |
3907 | name_comp_compare); | |
3908 | } | |
3909 | ||
3910 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3911 | mapped_index_base instead of the containing objfile. This is split |
3912 | to a separate function in order to be able to unit test the | |
3913 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3914 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3915 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
3916 | |
3917 | static void | |
3918 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 3919 | (mapped_index_base &index, |
5c58de74 PA |
3920 | const lookup_name_info &lookup_name_in, |
3921 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
3922 | enum search_domain kind, | |
3b00ef10 | 3923 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
3924 | { |
3925 | lookup_name_info lookup_name_without_params | |
3926 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3927 | |
3928 | /* Build the symbol name component sorted vector, if we haven't | |
3929 | yet. */ | |
3930 | index.build_name_components (); | |
3931 | ||
3f563c84 PA |
3932 | /* The same symbol may appear more than once in the range though. |
3933 | E.g., if we're looking for symbols that complete "w", and we have | |
3934 | a symbol named "w1::w2", we'll find the two name components for | |
3935 | that same symbol in the range. To be sure we only call the | |
3936 | callback once per symbol, we first collect the symbol name | |
3937 | indexes that matched in a temporary vector and ignore | |
3938 | duplicates. */ | |
3939 | std::vector<offset_type> matches; | |
3f563c84 | 3940 | |
3b00ef10 TT |
3941 | struct name_and_matcher |
3942 | { | |
3943 | symbol_name_matcher_ftype *matcher; | |
3944 | const std::string &name; | |
3945 | ||
3946 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3947 | { |
3b00ef10 TT |
3948 | return matcher == other.matcher && name == other.name; |
3949 | } | |
3950 | }; | |
3951 | ||
3952 | /* A vector holding all the different symbol name matchers, for all | |
3953 | languages. */ | |
3954 | std::vector<name_and_matcher> matchers; | |
3955 | ||
3956 | for (int i = 0; i < nr_languages; i++) | |
3957 | { | |
3958 | enum language lang_e = (enum language) i; | |
3959 | ||
3960 | const language_defn *lang = language_def (lang_e); | |
3961 | symbol_name_matcher_ftype *name_matcher | |
3962 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 3963 | |
3b00ef10 TT |
3964 | name_and_matcher key { |
3965 | name_matcher, | |
3966 | lookup_name_without_params.language_lookup_name (lang_e) | |
3967 | }; | |
3968 | ||
3969 | /* Don't insert the same comparison routine more than once. | |
3970 | Note that we do this linear walk. This is not a problem in | |
3971 | practice because the number of supported languages is | |
3972 | low. */ | |
3973 | if (std::find (matchers.begin (), matchers.end (), key) | |
3974 | != matchers.end ()) | |
9291a0cd | 3975 | continue; |
3b00ef10 TT |
3976 | matchers.push_back (std::move (key)); |
3977 | ||
3978 | auto bounds | |
3979 | = index.find_name_components_bounds (lookup_name_without_params, | |
3980 | lang_e); | |
3981 | ||
3982 | /* Now for each symbol name in range, check to see if we have a name | |
3983 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3984 | ||
3985 | for (; bounds.first != bounds.second; ++bounds.first) | |
3986 | { | |
3987 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
3988 | ||
3989 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3990 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3991 | continue; | |
9291a0cd | 3992 | |
3b00ef10 TT |
3993 | matches.push_back (bounds.first->idx); |
3994 | } | |
3f563c84 PA |
3995 | } |
3996 | ||
3997 | std::sort (matches.begin (), matches.end ()); | |
3998 | ||
3999 | /* Finally call the callback, once per match. */ | |
4000 | ULONGEST prev = -1; | |
4001 | for (offset_type idx : matches) | |
4002 | { | |
4003 | if (prev != idx) | |
4004 | { | |
3b00ef10 TT |
4005 | if (!match_callback (idx)) |
4006 | break; | |
3f563c84 PA |
4007 | prev = idx; |
4008 | } | |
4009 | } | |
4010 | ||
4011 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4012 | (offset_type)-1 are both possible values. */ | |
4013 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4014 | } | |
4015 | ||
c62446b1 PA |
4016 | #if GDB_SELF_TEST |
4017 | ||
4018 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4019 | ||
a3c5fafd PA |
4020 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4021 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4022 | mapped_index_base interface. Builds an index from the symbol list | |
4023 | passed as parameter to the constructor. */ | |
4024 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4025 | { |
4026 | public: | |
a3c5fafd PA |
4027 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4028 | : m_symbol_table (symbols) | |
c62446b1 PA |
4029 | {} |
4030 | ||
a3c5fafd | 4031 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4032 | |
a3c5fafd | 4033 | /* Return the number of names in the symbol table. */ |
632e107b | 4034 | size_t symbol_name_count () const override |
c62446b1 | 4035 | { |
a3c5fafd | 4036 | return m_symbol_table.size (); |
c62446b1 PA |
4037 | } |
4038 | ||
a3c5fafd | 4039 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4040 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4041 | { |
4042 | return m_symbol_table[idx]; | |
4043 | } | |
c62446b1 | 4044 | |
a3c5fafd PA |
4045 | private: |
4046 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4047 | }; |
4048 | ||
4049 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4050 | string, to pass to print routines. */ | |
4051 | ||
4052 | static const char * | |
4053 | string_or_null (const char *str) | |
4054 | { | |
4055 | return str != NULL ? str : "<null>"; | |
4056 | } | |
4057 | ||
4058 | /* Check if a lookup_name_info built from | |
4059 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4060 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4061 | matching order. If no match expected, then an empty list is | |
4062 | specified. Returns true on success. On failure prints a warning | |
4063 | indicating the file:line that failed, and returns false. */ | |
4064 | ||
4065 | static bool | |
4066 | check_match (const char *file, int line, | |
4067 | mock_mapped_index &mock_index, | |
4068 | const char *name, symbol_name_match_type match_type, | |
4069 | bool completion_mode, | |
4070 | std::initializer_list<const char *> expected_list) | |
4071 | { | |
4072 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4073 | ||
4074 | bool matched = true; | |
4075 | ||
4076 | auto mismatch = [&] (const char *expected_str, | |
4077 | const char *got) | |
4078 | { | |
4079 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4080 | "expected=\"%s\", got=\"%s\"\n"), | |
4081 | file, line, | |
4082 | (match_type == symbol_name_match_type::FULL | |
4083 | ? "FULL" : "WILD"), | |
4084 | name, string_or_null (expected_str), string_or_null (got)); | |
4085 | matched = false; | |
4086 | }; | |
4087 | ||
4088 | auto expected_it = expected_list.begin (); | |
4089 | auto expected_end = expected_list.end (); | |
4090 | ||
a3c5fafd | 4091 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4092 | NULL, ALL_DOMAIN, |
4093 | [&] (offset_type idx) | |
4094 | { | |
a3c5fafd | 4095 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4096 | const char *expected_str |
4097 | = expected_it == expected_end ? NULL : *expected_it++; | |
4098 | ||
4099 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4100 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4101 | return true; |
c62446b1 PA |
4102 | }); |
4103 | ||
4104 | const char *expected_str | |
4105 | = expected_it == expected_end ? NULL : *expected_it++; | |
4106 | if (expected_str != NULL) | |
4107 | mismatch (expected_str, NULL); | |
4108 | ||
4109 | return matched; | |
4110 | } | |
4111 | ||
4112 | /* The symbols added to the mock mapped_index for testing (in | |
4113 | canonical form). */ | |
4114 | static const char *test_symbols[] = { | |
4115 | "function", | |
4116 | "std::bar", | |
4117 | "std::zfunction", | |
4118 | "std::zfunction2", | |
4119 | "w1::w2", | |
4120 | "ns::foo<char*>", | |
4121 | "ns::foo<int>", | |
4122 | "ns::foo<long>", | |
a20714ff PA |
4123 | "ns2::tmpl<int>::foo2", |
4124 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4125 | |
e1ef7d7a PA |
4126 | /* These are used to check that the increment-last-char in the |
4127 | matching algorithm for completion doesn't match "t1_fund" when | |
4128 | completing "t1_func". */ | |
4129 | "t1_func", | |
4130 | "t1_func1", | |
4131 | "t1_fund", | |
4132 | "t1_fund1", | |
4133 | ||
4134 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4135 | cp-name-parser understands this as a single identifier ("função" | |
4136 | is "function" in PT). */ | |
4137 | u8"u8função", | |
4138 | ||
4139 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4140 | "yfunc\377", | |
4141 | ||
4142 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4143 | "\377", | |
4144 | "\377\377123", | |
4145 | ||
c62446b1 PA |
4146 | /* A name with all sorts of complications. Starts with "z" to make |
4147 | it easier for the completion tests below. */ | |
4148 | #define Z_SYM_NAME \ | |
4149 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4150 | "::tuple<(anonymous namespace)::ui*, " \ | |
4151 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4152 | ||
4153 | Z_SYM_NAME | |
4154 | }; | |
4155 | ||
a3c5fafd PA |
4156 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4157 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4158 | in completion mode. */ | |
5c58de74 PA |
4159 | |
4160 | static bool | |
a3c5fafd | 4161 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4162 | const char *search_name, |
4163 | gdb::array_view<const char *> expected_syms) | |
4164 | { | |
4165 | lookup_name_info lookup_name (search_name, | |
4166 | symbol_name_match_type::FULL, true); | |
4167 | ||
3b00ef10 TT |
4168 | auto bounds = index.find_name_components_bounds (lookup_name, |
4169 | language_cplus); | |
5c58de74 PA |
4170 | |
4171 | size_t distance = std::distance (bounds.first, bounds.second); | |
4172 | if (distance != expected_syms.size ()) | |
4173 | return false; | |
4174 | ||
4175 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4176 | { | |
4177 | auto nc_elem = bounds.first + exp_elem; | |
4178 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4179 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4180 | return false; | |
4181 | } | |
4182 | ||
4183 | return true; | |
4184 | } | |
4185 | ||
4186 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4187 | method. */ | |
4188 | ||
c62446b1 | 4189 | static void |
5c58de74 PA |
4190 | test_mapped_index_find_name_component_bounds () |
4191 | { | |
4192 | mock_mapped_index mock_index (test_symbols); | |
4193 | ||
a3c5fafd | 4194 | mock_index.build_name_components (); |
5c58de74 PA |
4195 | |
4196 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4197 | method in completion mode. */ | |
4198 | { | |
4199 | static const char *expected_syms[] = { | |
4200 | "t1_func", | |
4201 | "t1_func1", | |
5c58de74 PA |
4202 | }; |
4203 | ||
a3c5fafd | 4204 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4205 | "t1_func", expected_syms)); |
4206 | } | |
4207 | ||
4208 | /* Check that the increment-last-char in the name matching algorithm | |
4209 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4210 | { | |
4211 | static const char *expected_syms1[] = { | |
4212 | "\377", | |
4213 | "\377\377123", | |
4214 | }; | |
a3c5fafd | 4215 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4216 | "\377", expected_syms1)); |
4217 | ||
4218 | static const char *expected_syms2[] = { | |
4219 | "\377\377123", | |
4220 | }; | |
a3c5fafd | 4221 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4222 | "\377\377", expected_syms2)); |
4223 | } | |
4224 | } | |
4225 | ||
4226 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4227 | ||
4228 | static void | |
4229 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4230 | { |
4231 | mock_mapped_index mock_index (test_symbols); | |
4232 | ||
4233 | /* We let all tests run until the end even if some fails, for debug | |
4234 | convenience. */ | |
4235 | bool any_mismatch = false; | |
4236 | ||
4237 | /* Create the expected symbols list (an initializer_list). Needed | |
4238 | because lists have commas, and we need to pass them to CHECK, | |
4239 | which is a macro. */ | |
4240 | #define EXPECT(...) { __VA_ARGS__ } | |
4241 | ||
4242 | /* Wrapper for check_match that passes down the current | |
4243 | __FILE__/__LINE__. */ | |
4244 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4245 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4246 | mock_index, \ | |
4247 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4248 | EXPECTED_LIST) | |
4249 | ||
4250 | /* Identity checks. */ | |
4251 | for (const char *sym : test_symbols) | |
4252 | { | |
4253 | /* Should be able to match all existing symbols. */ | |
4254 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4255 | EXPECT (sym)); | |
4256 | ||
4257 | /* Should be able to match all existing symbols with | |
4258 | parameters. */ | |
4259 | std::string with_params = std::string (sym) + "(int)"; | |
4260 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4261 | EXPECT (sym)); | |
4262 | ||
4263 | /* Should be able to match all existing symbols with | |
4264 | parameters and qualifiers. */ | |
4265 | with_params = std::string (sym) + " ( int ) const"; | |
4266 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4267 | EXPECT (sym)); | |
4268 | ||
4269 | /* This should really find sym, but cp-name-parser.y doesn't | |
4270 | know about lvalue/rvalue qualifiers yet. */ | |
4271 | with_params = std::string (sym) + " ( int ) &&"; | |
4272 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4273 | {}); | |
4274 | } | |
4275 | ||
e1ef7d7a PA |
4276 | /* Check that the name matching algorithm for completion doesn't get |
4277 | confused with Latin1 'ÿ' / 0xff. */ | |
4278 | { | |
4279 | static const char str[] = "\377"; | |
4280 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4281 | EXPECT ("\377", "\377\377123")); | |
4282 | } | |
4283 | ||
4284 | /* Check that the increment-last-char in the matching algorithm for | |
4285 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4286 | { | |
4287 | static const char str[] = "t1_func"; | |
4288 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4289 | EXPECT ("t1_func", "t1_func1")); | |
4290 | } | |
4291 | ||
c62446b1 PA |
4292 | /* Check that completion mode works at each prefix of the expected |
4293 | symbol name. */ | |
4294 | { | |
4295 | static const char str[] = "function(int)"; | |
4296 | size_t len = strlen (str); | |
4297 | std::string lookup; | |
4298 | ||
4299 | for (size_t i = 1; i < len; i++) | |
4300 | { | |
4301 | lookup.assign (str, i); | |
4302 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4303 | EXPECT ("function")); | |
4304 | } | |
4305 | } | |
4306 | ||
4307 | /* While "w" is a prefix of both components, the match function | |
4308 | should still only be called once. */ | |
4309 | { | |
4310 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4311 | EXPECT ("w1::w2")); | |
a20714ff PA |
4312 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4313 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4314 | } |
4315 | ||
4316 | /* Same, with a "complicated" symbol. */ | |
4317 | { | |
4318 | static const char str[] = Z_SYM_NAME; | |
4319 | size_t len = strlen (str); | |
4320 | std::string lookup; | |
4321 | ||
4322 | for (size_t i = 1; i < len; i++) | |
4323 | { | |
4324 | lookup.assign (str, i); | |
4325 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4326 | EXPECT (Z_SYM_NAME)); | |
4327 | } | |
4328 | } | |
4329 | ||
4330 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4331 | { | |
4332 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4333 | {}); | |
4334 | } | |
4335 | ||
4336 | /* A complete symbol with parameters matches any overload, since the | |
4337 | index has no overload info. */ | |
4338 | { | |
4339 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4340 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4341 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4342 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4343 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4344 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4345 | } |
4346 | ||
4347 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4348 | template argument list. */ | |
4349 | { | |
4350 | static const char expected[] = "ns::foo<int>"; | |
4351 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4352 | EXPECT (expected)); | |
a20714ff PA |
4353 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4354 | EXPECT (expected)); | |
c62446b1 PA |
4355 | } |
4356 | ||
4357 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4358 | template argument list that includes a pointer. */ | |
4359 | { | |
4360 | static const char expected[] = "ns::foo<char*>"; | |
4361 | /* Try both completion and non-completion modes. */ | |
4362 | static const bool completion_mode[2] = {false, true}; | |
4363 | for (size_t i = 0; i < 2; i++) | |
4364 | { | |
4365 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4366 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4367 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4368 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4369 | |
4370 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4371 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4372 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4373 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4374 | } |
4375 | } | |
4376 | ||
4377 | { | |
4378 | /* Check method qualifiers are ignored. */ | |
4379 | static const char expected[] = "ns::foo<char*>"; | |
4380 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4381 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4382 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4383 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4384 | CHECK_MATCH ("foo < char * > ( int ) const", |
4385 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4386 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4387 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4388 | } |
4389 | ||
4390 | /* Test lookup names that don't match anything. */ | |
4391 | { | |
a20714ff PA |
4392 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4393 | {}); | |
4394 | ||
c62446b1 PA |
4395 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4396 | {}); | |
4397 | } | |
4398 | ||
a20714ff PA |
4399 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4400 | which should not be confused with a parameter list. */ | |
4401 | { | |
4402 | static const char *syms[] = { | |
4403 | "A::B::C", | |
4404 | "B::C", | |
4405 | "C", | |
4406 | "A :: B :: C ( int )", | |
4407 | "B :: C ( int )", | |
4408 | "C ( int )", | |
4409 | }; | |
4410 | ||
4411 | for (const char *s : syms) | |
4412 | { | |
4413 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4414 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4415 | } | |
4416 | } | |
4417 | ||
4418 | { | |
4419 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4420 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4421 | EXPECT (expected)); | |
4422 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4423 | EXPECT (expected)); | |
4424 | } | |
4425 | ||
c62446b1 PA |
4426 | SELF_CHECK (!any_mismatch); |
4427 | ||
4428 | #undef EXPECT | |
4429 | #undef CHECK_MATCH | |
4430 | } | |
4431 | ||
5c58de74 PA |
4432 | static void |
4433 | run_test () | |
4434 | { | |
4435 | test_mapped_index_find_name_component_bounds (); | |
4436 | test_dw2_expand_symtabs_matching_symbol (); | |
4437 | } | |
4438 | ||
c62446b1 PA |
4439 | }} // namespace selftests::dw2_expand_symtabs_matching |
4440 | ||
4441 | #endif /* GDB_SELF_TEST */ | |
4442 | ||
4b514bc8 JK |
4443 | /* If FILE_MATCHER is NULL or if PER_CU has |
4444 | dwarf2_per_cu_quick_data::MARK set (see | |
4445 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4446 | EXPANSION_NOTIFY on it. */ | |
4447 | ||
4448 | static void | |
4449 | dw2_expand_symtabs_matching_one | |
4450 | (struct dwarf2_per_cu_data *per_cu, | |
4451 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4452 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4453 | { | |
4454 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4455 | { | |
4456 | bool symtab_was_null | |
4457 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4458 | ||
58f0c718 | 4459 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4460 | |
4461 | if (expansion_notify != NULL | |
4462 | && symtab_was_null | |
4463 | && per_cu->v.quick->compunit_symtab != NULL) | |
4464 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4465 | } | |
4466 | } | |
4467 | ||
3f563c84 PA |
4468 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4469 | matched, to expand corresponding CUs that were marked. IDX is the | |
4470 | index of the symbol name that matched. */ | |
4471 | ||
4472 | static void | |
4473 | dw2_expand_marked_cus | |
ed2dc618 | 4474 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
4475 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4476 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4477 | search_domain kind) | |
4478 | { | |
3f563c84 PA |
4479 | offset_type *vec, vec_len, vec_idx; |
4480 | bool global_seen = false; | |
ed2dc618 | 4481 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 4482 | |
61920122 | 4483 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 4484 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
4485 | vec_len = MAYBE_SWAP (vec[0]); |
4486 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4487 | { | |
61920122 PA |
4488 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
4489 | /* This value is only valid for index versions >= 7. */ | |
4490 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4491 | gdb_index_symbol_kind symbol_kind = | |
4492 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4493 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4494 | /* Only check the symbol attributes if they're present. | |
4495 | Indices prior to version 7 don't record them, | |
4496 | and indices >= 7 may elide them for certain symbols | |
4497 | (gold does this). */ | |
4498 | int attrs_valid = | |
4499 | (index.version >= 7 | |
4500 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4501 | ||
4502 | /* Work around gold/15646. */ | |
4503 | if (attrs_valid) | |
9291a0cd | 4504 | { |
61920122 PA |
4505 | if (!is_static && global_seen) |
4506 | continue; | |
4507 | if (!is_static) | |
4508 | global_seen = true; | |
4509 | } | |
3190f0c6 | 4510 | |
61920122 PA |
4511 | /* Only check the symbol's kind if it has one. */ |
4512 | if (attrs_valid) | |
4513 | { | |
4514 | switch (kind) | |
8943b874 | 4515 | { |
61920122 PA |
4516 | case VARIABLES_DOMAIN: |
4517 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4518 | continue; | |
4519 | break; | |
4520 | case FUNCTIONS_DOMAIN: | |
4521 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4522 | continue; |
61920122 PA |
4523 | break; |
4524 | case TYPES_DOMAIN: | |
4525 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4526 | continue; | |
4527 | break; | |
59c35742 AB |
4528 | case MODULES_DOMAIN: |
4529 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4530 | continue; | |
4531 | break; | |
61920122 PA |
4532 | default: |
4533 | break; | |
8943b874 | 4534 | } |
61920122 | 4535 | } |
8943b874 | 4536 | |
61920122 | 4537 | /* Don't crash on bad data. */ |
b76e467d | 4538 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4539 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 4540 | { |
b98664d3 | 4541 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
4542 | " [in module %s]"), |
4543 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
4544 | continue; |
4545 | } | |
4546 | ||
ff4c9fec | 4547 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
4548 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
4549 | expansion_notify); | |
61920122 PA |
4550 | } |
4551 | } | |
4552 | ||
4b514bc8 JK |
4553 | /* If FILE_MATCHER is non-NULL, set all the |
4554 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4555 | that match FILE_MATCHER. */ | |
4556 | ||
61920122 | 4557 | static void |
4b514bc8 | 4558 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
4559 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4560 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 4561 | { |
4b514bc8 | 4562 | if (file_matcher == NULL) |
61920122 PA |
4563 | return; |
4564 | ||
4b514bc8 JK |
4565 | objfile *const objfile = dwarf2_per_objfile->objfile; |
4566 | ||
4567 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4568 | htab_eq_pointer, | |
4569 | NULL, xcalloc, xfree)); | |
4570 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4571 | htab_eq_pointer, |
4572 | NULL, xcalloc, xfree)); | |
61920122 | 4573 | |
4b514bc8 JK |
4574 | /* The rule is CUs specify all the files, including those used by |
4575 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4576 | |
b76e467d | 4577 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4578 | { |
927aa2e7 JK |
4579 | QUIT; |
4580 | ||
4581 | per_cu->v.quick->mark = 0; | |
4582 | ||
4583 | /* We only need to look at symtabs not already expanded. */ | |
4584 | if (per_cu->v.quick->compunit_symtab) | |
4585 | continue; | |
4586 | ||
b76e467d | 4587 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4588 | if (file_data == NULL) |
4589 | continue; | |
4590 | ||
4591 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4592 | continue; | |
4593 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4594 | { | |
4595 | per_cu->v.quick->mark = 1; | |
4596 | continue; | |
4597 | } | |
4598 | ||
b76e467d | 4599 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4600 | { |
4601 | const char *this_real_name; | |
4602 | ||
4603 | if (file_matcher (file_data->file_names[j], false)) | |
4604 | { | |
4605 | per_cu->v.quick->mark = 1; | |
4606 | break; | |
4607 | } | |
4608 | ||
4609 | /* Before we invoke realpath, which can get expensive when many | |
4610 | files are involved, do a quick comparison of the basenames. */ | |
4611 | if (!basenames_may_differ | |
4612 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4613 | true)) | |
4614 | continue; | |
4615 | ||
4616 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4617 | if (file_matcher (this_real_name, false)) | |
4618 | { | |
4619 | per_cu->v.quick->mark = 1; | |
4620 | break; | |
4621 | } | |
4622 | } | |
4623 | ||
b76e467d SM |
4624 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4625 | ? visited_found.get () | |
4626 | : visited_not_found.get (), | |
4627 | file_data, INSERT); | |
927aa2e7 JK |
4628 | *slot = file_data; |
4629 | } | |
4630 | } | |
4631 | ||
4632 | static void | |
4633 | dw2_expand_symtabs_matching | |
4634 | (struct objfile *objfile, | |
4635 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4636 | const lookup_name_info &lookup_name, | |
4637 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4638 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4639 | enum search_domain kind) | |
4640 | { | |
ed2dc618 SM |
4641 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4642 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4643 | |
4644 | /* index_table is NULL if OBJF_READNOW. */ | |
4645 | if (!dwarf2_per_objfile->index_table) | |
4646 | return; | |
4647 | ||
ed2dc618 | 4648 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
4649 | |
4650 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
4651 | ||
4652 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
4653 | symbol_matcher, | |
4654 | kind, [&] (offset_type idx) | |
4655 | { | |
ed2dc618 | 4656 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 4657 | expansion_notify, kind); |
3b00ef10 | 4658 | return true; |
927aa2e7 JK |
4659 | }); |
4660 | } | |
4661 | ||
4662 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4663 | symtab. */ | |
4664 | ||
4665 | static struct compunit_symtab * | |
4666 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4667 | CORE_ADDR pc) | |
4668 | { | |
4669 | int i; | |
4670 | ||
4671 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4672 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4673 | return cust; | |
4674 | ||
4675 | if (cust->includes == NULL) | |
4676 | return NULL; | |
4677 | ||
4678 | for (i = 0; cust->includes[i]; ++i) | |
4679 | { | |
4680 | struct compunit_symtab *s = cust->includes[i]; | |
4681 | ||
4682 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4683 | if (s != NULL) | |
4684 | return s; | |
4685 | } | |
4686 | ||
4687 | return NULL; | |
4688 | } | |
4689 | ||
4690 | static struct compunit_symtab * | |
4691 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4692 | struct bound_minimal_symbol msymbol, | |
4693 | CORE_ADDR pc, | |
4694 | struct obj_section *section, | |
4695 | int warn_if_readin) | |
4696 | { | |
4697 | struct dwarf2_per_cu_data *data; | |
4698 | struct compunit_symtab *result; | |
4699 | ||
d320c2b5 | 4700 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
4701 | return NULL; |
4702 | ||
b3b3bada | 4703 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
d320c2b5 TT |
4704 | data = (struct dwarf2_per_cu_data *) addrmap_find |
4705 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
4706 | if (!data) |
4707 | return NULL; | |
4708 | ||
4709 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
4710 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
4711 | paddress (get_objfile_arch (objfile), pc)); | |
4712 | ||
4713 | result | |
58f0c718 TT |
4714 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
4715 | false), | |
927aa2e7 JK |
4716 | pc); |
4717 | gdb_assert (result != NULL); | |
4718 | return result; | |
4719 | } | |
4720 | ||
4721 | static void | |
4722 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
4723 | void *data, int need_fullname) | |
4724 | { | |
ed2dc618 SM |
4725 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4726 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4727 | |
4728 | if (!dwarf2_per_objfile->filenames_cache) | |
4729 | { | |
4730 | dwarf2_per_objfile->filenames_cache.emplace (); | |
4731 | ||
4732 | htab_up visited (htab_create_alloc (10, | |
4733 | htab_hash_pointer, htab_eq_pointer, | |
4734 | NULL, xcalloc, xfree)); | |
4735 | ||
4736 | /* The rule is CUs specify all the files, including those used | |
4737 | by any TU, so there's no need to scan TUs here. We can | |
4738 | ignore file names coming from already-expanded CUs. */ | |
4739 | ||
b76e467d | 4740 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4741 | { |
927aa2e7 JK |
4742 | if (per_cu->v.quick->compunit_symtab) |
4743 | { | |
4744 | void **slot = htab_find_slot (visited.get (), | |
4745 | per_cu->v.quick->file_names, | |
4746 | INSERT); | |
4747 | ||
4748 | *slot = per_cu->v.quick->file_names; | |
4749 | } | |
4750 | } | |
4751 | ||
b76e467d | 4752 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4753 | { |
927aa2e7 JK |
4754 | /* We only need to look at symtabs not already expanded. */ |
4755 | if (per_cu->v.quick->compunit_symtab) | |
4756 | continue; | |
4757 | ||
b76e467d | 4758 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4759 | if (file_data == NULL) |
4760 | continue; | |
4761 | ||
b76e467d | 4762 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
4763 | if (*slot) |
4764 | { | |
4765 | /* Already visited. */ | |
4766 | continue; | |
4767 | } | |
4768 | *slot = file_data; | |
4769 | ||
4770 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4771 | { | |
4772 | const char *filename = file_data->file_names[j]; | |
4773 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4774 | } | |
4775 | } | |
4776 | } | |
4777 | ||
4778 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4779 | { | |
4780 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4781 | ||
4782 | if (need_fullname) | |
4783 | this_real_name = gdb_realpath (filename); | |
4784 | (*fun) (filename, this_real_name.get (), data); | |
4785 | }); | |
4786 | } | |
4787 | ||
4788 | static int | |
4789 | dw2_has_symbols (struct objfile *objfile) | |
4790 | { | |
4791 | return 1; | |
4792 | } | |
4793 | ||
4794 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4795 | { | |
4796 | dw2_has_symbols, | |
4797 | dw2_find_last_source_symtab, | |
4798 | dw2_forget_cached_source_info, | |
4799 | dw2_map_symtabs_matching_filename, | |
4800 | dw2_lookup_symbol, | |
4801 | dw2_print_stats, | |
4802 | dw2_dump, | |
927aa2e7 JK |
4803 | dw2_expand_symtabs_for_function, |
4804 | dw2_expand_all_symtabs, | |
4805 | dw2_expand_symtabs_with_fullname, | |
4806 | dw2_map_matching_symbols, | |
4807 | dw2_expand_symtabs_matching, | |
4808 | dw2_find_pc_sect_compunit_symtab, | |
4809 | NULL, | |
4810 | dw2_map_symbol_filenames | |
4811 | }; | |
4812 | ||
4813 | /* DWARF-5 debug_names reader. */ | |
4814 | ||
4815 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4816 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4817 | ||
4818 | /* A helper function that reads the .debug_names section in SECTION | |
4819 | and fills in MAP. FILENAME is the name of the file containing the | |
4820 | section; it is used for error reporting. | |
4821 | ||
4822 | Returns true if all went well, false otherwise. */ | |
4823 | ||
4824 | static bool | |
4825 | read_debug_names_from_section (struct objfile *objfile, | |
4826 | const char *filename, | |
4827 | struct dwarf2_section_info *section, | |
4828 | mapped_debug_names &map) | |
4829 | { | |
96b79293 | 4830 | if (section->empty ()) |
927aa2e7 JK |
4831 | return false; |
4832 | ||
4833 | /* Older elfutils strip versions could keep the section in the main | |
4834 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4835 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4836 | return false; |
4837 | ||
96b79293 | 4838 | section->read (objfile); |
927aa2e7 JK |
4839 | |
4840 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
4841 | ||
4842 | const gdb_byte *addr = section->buffer; | |
4843 | ||
96b79293 | 4844 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4845 | |
4846 | unsigned int bytes_read; | |
4847 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4848 | addr += bytes_read; | |
4849 | ||
4850 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4851 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4852 | if (bytes_read + length != section->size) | |
4853 | { | |
4854 | /* There may be multiple per-CU indices. */ | |
4855 | warning (_("Section .debug_names in %s length %s does not match " | |
4856 | "section length %s, ignoring .debug_names."), | |
4857 | filename, plongest (bytes_read + length), | |
4858 | pulongest (section->size)); | |
4859 | return false; | |
4860 | } | |
4861 | ||
4862 | /* The version number. */ | |
4863 | uint16_t version = read_2_bytes (abfd, addr); | |
4864 | addr += 2; | |
4865 | if (version != 5) | |
4866 | { | |
4867 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4868 | "ignoring .debug_names."), | |
4869 | filename, version); | |
4870 | return false; | |
4871 | } | |
4872 | ||
4873 | /* Padding. */ | |
4874 | uint16_t padding = read_2_bytes (abfd, addr); | |
4875 | addr += 2; | |
4876 | if (padding != 0) | |
4877 | { | |
4878 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4879 | "ignoring .debug_names."), | |
4880 | filename, padding); | |
4881 | return false; | |
4882 | } | |
4883 | ||
4884 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4885 | map.cu_count = read_4_bytes (abfd, addr); | |
4886 | addr += 4; | |
4887 | ||
4888 | /* local_type_unit_count - The number of TUs in the local TU | |
4889 | list. */ | |
4890 | map.tu_count = read_4_bytes (abfd, addr); | |
4891 | addr += 4; | |
4892 | ||
4893 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4894 | list. */ | |
4895 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4896 | addr += 4; | |
4897 | if (foreign_tu_count != 0) | |
4898 | { | |
4899 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4900 | "ignoring .debug_names."), | |
4901 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4902 | return false; | |
4903 | } | |
4904 | ||
4905 | /* bucket_count - The number of hash buckets in the hash lookup | |
4906 | table. */ | |
4907 | map.bucket_count = read_4_bytes (abfd, addr); | |
4908 | addr += 4; | |
4909 | ||
4910 | /* name_count - The number of unique names in the index. */ | |
4911 | map.name_count = read_4_bytes (abfd, addr); | |
4912 | addr += 4; | |
4913 | ||
4914 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4915 | table. */ | |
4916 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4917 | addr += 4; | |
4918 | ||
4919 | /* augmentation_string_size - The size in bytes of the augmentation | |
4920 | string. This value is rounded up to a multiple of 4. */ | |
4921 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4922 | addr += 4; | |
4923 | map.augmentation_is_gdb = ((augmentation_string_size | |
4924 | == sizeof (dwarf5_augmentation)) | |
4925 | && memcmp (addr, dwarf5_augmentation, | |
4926 | sizeof (dwarf5_augmentation)) == 0); | |
4927 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4928 | addr += augmentation_string_size; | |
4929 | ||
4930 | /* List of CUs */ | |
4931 | map.cu_table_reordered = addr; | |
4932 | addr += map.cu_count * map.offset_size; | |
4933 | ||
4934 | /* List of Local TUs */ | |
4935 | map.tu_table_reordered = addr; | |
4936 | addr += map.tu_count * map.offset_size; | |
4937 | ||
4938 | /* Hash Lookup Table */ | |
4939 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4940 | addr += map.bucket_count * 4; | |
4941 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4942 | addr += map.name_count * 4; | |
4943 | ||
4944 | /* Name Table */ | |
4945 | map.name_table_string_offs_reordered = addr; | |
4946 | addr += map.name_count * map.offset_size; | |
4947 | map.name_table_entry_offs_reordered = addr; | |
4948 | addr += map.name_count * map.offset_size; | |
4949 | ||
4950 | const gdb_byte *abbrev_table_start = addr; | |
4951 | for (;;) | |
4952 | { | |
927aa2e7 JK |
4953 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4954 | addr += bytes_read; | |
4955 | if (index_num == 0) | |
4956 | break; | |
4957 | ||
4958 | const auto insertpair | |
4959 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4960 | if (!insertpair.second) | |
4961 | { | |
4962 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4963 | "ignoring .debug_names."), | |
4964 | filename, pulongest (index_num)); | |
4965 | return false; | |
4966 | } | |
4967 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4968 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4969 | addr += bytes_read; | |
4970 | ||
4971 | for (;;) | |
4972 | { | |
4973 | mapped_debug_names::index_val::attr attr; | |
4974 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4975 | addr += bytes_read; | |
4976 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4977 | addr += bytes_read; | |
4978 | if (attr.form == DW_FORM_implicit_const) | |
4979 | { | |
4980 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4981 | &bytes_read); | |
4982 | addr += bytes_read; | |
4983 | } | |
4984 | if (attr.dw_idx == 0 && attr.form == 0) | |
4985 | break; | |
4986 | indexval.attr_vec.push_back (std::move (attr)); | |
4987 | } | |
4988 | } | |
4989 | if (addr != abbrev_table_start + abbrev_table_size) | |
4990 | { | |
4991 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
4992 | "of size %s vs. written as %u, ignoring .debug_names."), |
4993 | filename, plongest (addr - abbrev_table_start), | |
4994 | abbrev_table_size); | |
927aa2e7 JK |
4995 | return false; |
4996 | } | |
4997 | map.entry_pool = addr; | |
4998 | ||
4999 | return true; | |
5000 | } | |
5001 | ||
5002 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5003 | list. */ | |
5004 | ||
5005 | static void | |
ed2dc618 | 5006 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5007 | const mapped_debug_names &map, |
5008 | dwarf2_section_info §ion, | |
b76e467d | 5009 | bool is_dwz) |
927aa2e7 JK |
5010 | { |
5011 | sect_offset sect_off_prev; | |
5012 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5013 | { | |
5014 | sect_offset sect_off_next; | |
5015 | if (i < map.cu_count) | |
5016 | { | |
5017 | sect_off_next | |
5018 | = (sect_offset) (extract_unsigned_integer | |
5019 | (map.cu_table_reordered + i * map.offset_size, | |
5020 | map.offset_size, | |
5021 | map.dwarf5_byte_order)); | |
5022 | } | |
5023 | else | |
5024 | sect_off_next = (sect_offset) section.size; | |
5025 | if (i >= 1) | |
5026 | { | |
5027 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5028 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5029 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5030 | sect_off_prev, length); |
b76e467d | 5031 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5032 | } |
5033 | sect_off_prev = sect_off_next; | |
5034 | } | |
5035 | } | |
5036 | ||
5037 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5038 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5039 | |
5040 | static void | |
ed2dc618 | 5041 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5042 | const mapped_debug_names &map, |
5043 | const mapped_debug_names &dwz_map) | |
5044 | { | |
b76e467d SM |
5045 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5046 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5047 | |
ed2dc618 SM |
5048 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5049 | dwarf2_per_objfile->info, | |
b76e467d | 5050 | false /* is_dwz */); |
927aa2e7 JK |
5051 | |
5052 | if (dwz_map.cu_count == 0) | |
5053 | return; | |
5054 | ||
ed2dc618 SM |
5055 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5056 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5057 | true /* is_dwz */); |
927aa2e7 JK |
5058 | } |
5059 | ||
5060 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5061 | elements of all the CUs and return true. Otherwise, return false. */ | |
5062 | ||
5063 | static bool | |
ed2dc618 | 5064 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5065 | { |
22ca247e TT |
5066 | std::unique_ptr<mapped_debug_names> map |
5067 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5068 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5069 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5070 | |
5071 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5072 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5073 | *map)) |
927aa2e7 JK |
5074 | return false; |
5075 | ||
5076 | /* Don't use the index if it's empty. */ | |
22ca247e | 5077 | if (map->name_count == 0) |
927aa2e7 JK |
5078 | return false; |
5079 | ||
5080 | /* If there is a .dwz file, read it so we can get its CU list as | |
5081 | well. */ | |
ed2dc618 | 5082 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5083 | if (dwz != NULL) |
5084 | { | |
5085 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5086 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5087 | &dwz->debug_names, dwz_map)) |
5088 | { | |
5089 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5090 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5091 | return false; |
5092 | } | |
5093 | } | |
5094 | ||
22ca247e | 5095 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5096 | |
22ca247e | 5097 | if (map->tu_count != 0) |
927aa2e7 JK |
5098 | { |
5099 | /* We can only handle a single .debug_types when we have an | |
5100 | index. */ | |
fd5866f6 | 5101 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5102 | return false; |
5103 | ||
fd5866f6 | 5104 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5105 | |
5106 | create_signatured_type_table_from_debug_names | |
22ca247e | 5107 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5108 | } |
5109 | ||
ed2dc618 SM |
5110 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5111 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5112 | |
22ca247e | 5113 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5114 | dwarf2_per_objfile->using_index = 1; |
5115 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5116 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5117 | |
5118 | return true; | |
5119 | } | |
5120 | ||
927aa2e7 JK |
5121 | /* Type used to manage iterating over all CUs looking for a symbol for |
5122 | .debug_names. */ | |
5123 | ||
5124 | class dw2_debug_names_iterator | |
5125 | { | |
5126 | public: | |
927aa2e7 | 5127 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5128 | gdb::optional<block_enum> block_index, |
5129 | domain_enum domain, | |
927aa2e7 | 5130 | const char *name) |
2b79f376 | 5131 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5132 | m_addr (find_vec_in_debug_names (map, name)) |
5133 | {} | |
5134 | ||
5135 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5136 | search_domain search, uint32_t namei) | |
5137 | : m_map (map), | |
5138 | m_search (search), | |
5139 | m_addr (find_vec_in_debug_names (map, namei)) | |
5140 | {} | |
5141 | ||
3b00ef10 TT |
5142 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5143 | block_enum block_index, domain_enum domain, | |
5144 | uint32_t namei) | |
5145 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5146 | m_addr (find_vec_in_debug_names (map, namei)) | |
5147 | {} | |
5148 | ||
927aa2e7 JK |
5149 | /* Return the next matching CU or NULL if there are no more. */ |
5150 | dwarf2_per_cu_data *next (); | |
5151 | ||
5152 | private: | |
5153 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5154 | const char *name); | |
5155 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5156 | uint32_t namei); | |
5157 | ||
5158 | /* The internalized form of .debug_names. */ | |
5159 | const mapped_debug_names &m_map; | |
5160 | ||
2b79f376 SM |
5161 | /* If set, only look for symbols that match that block. Valid values are |
5162 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5163 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5164 | |
5165 | /* The kind of symbol we're looking for. */ | |
5166 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5167 | const search_domain m_search = ALL_DOMAIN; | |
5168 | ||
5169 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5170 | not found. */ | |
5171 | const gdb_byte *m_addr; | |
5172 | }; | |
5173 | ||
5174 | const char * | |
5175 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5176 | { | |
5177 | const ULONGEST namei_string_offs | |
5178 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5179 | + namei * offset_size), | |
5180 | offset_size, | |
5181 | dwarf5_byte_order); | |
5182 | return read_indirect_string_at_offset | |
ed2dc618 | 5183 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5184 | } |
5185 | ||
5186 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5187 | found, return pointer to its pool data. If NAME cannot be found, | |
5188 | return NULL. */ | |
5189 | ||
5190 | const gdb_byte * | |
5191 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5192 | (const mapped_debug_names &map, const char *name) | |
5193 | { | |
5194 | int (*cmp) (const char *, const char *); | |
5195 | ||
54ee4252 | 5196 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5197 | if (current_language->la_language == language_cplus |
5198 | || current_language->la_language == language_fortran | |
5199 | || current_language->la_language == language_d) | |
5200 | { | |
5201 | /* NAME is already canonical. Drop any qualifiers as | |
5202 | .debug_names does not contain any. */ | |
5203 | ||
5204 | if (strchr (name, '(') != NULL) | |
5205 | { | |
54ee4252 | 5206 | without_params = cp_remove_params (name); |
927aa2e7 | 5207 | if (without_params != NULL) |
54ee4252 | 5208 | name = without_params.get (); |
927aa2e7 JK |
5209 | } |
5210 | } | |
5211 | ||
5212 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5213 | ||
5214 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5215 | uint32_t namei | |
5216 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5217 | (map.bucket_table_reordered | |
5218 | + (full_hash % map.bucket_count)), 4, | |
5219 | map.dwarf5_byte_order); | |
5220 | if (namei == 0) | |
5221 | return NULL; | |
5222 | --namei; | |
5223 | if (namei >= map.name_count) | |
5224 | { | |
b98664d3 | 5225 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5226 | "[in module %s]"), |
5227 | namei, map.name_count, | |
ed2dc618 | 5228 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5229 | return NULL; |
5230 | } | |
5231 | ||
5232 | for (;;) | |
5233 | { | |
5234 | const uint32_t namei_full_hash | |
5235 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5236 | (map.hash_table_reordered + namei), 4, | |
5237 | map.dwarf5_byte_order); | |
5238 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5239 | return NULL; | |
5240 | ||
5241 | if (full_hash == namei_full_hash) | |
5242 | { | |
5243 | const char *const namei_string = map.namei_to_name (namei); | |
5244 | ||
5245 | #if 0 /* An expensive sanity check. */ | |
5246 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5247 | { | |
b98664d3 | 5248 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5249 | "[in module %s]"), |
5250 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5251 | return NULL; | |
5252 | } | |
5253 | #endif | |
5254 | ||
5255 | if (cmp (namei_string, name) == 0) | |
5256 | { | |
5257 | const ULONGEST namei_entry_offs | |
5258 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5259 | + namei * map.offset_size), | |
5260 | map.offset_size, map.dwarf5_byte_order); | |
5261 | return map.entry_pool + namei_entry_offs; | |
5262 | } | |
5263 | } | |
5264 | ||
5265 | ++namei; | |
5266 | if (namei >= map.name_count) | |
5267 | return NULL; | |
5268 | } | |
5269 | } | |
5270 | ||
5271 | const gdb_byte * | |
5272 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5273 | (const mapped_debug_names &map, uint32_t namei) | |
5274 | { | |
5275 | if (namei >= map.name_count) | |
5276 | { | |
b98664d3 | 5277 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5278 | "[in module %s]"), |
5279 | namei, map.name_count, | |
ed2dc618 | 5280 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5281 | return NULL; |
5282 | } | |
5283 | ||
5284 | const ULONGEST namei_entry_offs | |
5285 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5286 | + namei * map.offset_size), | |
5287 | map.offset_size, map.dwarf5_byte_order); | |
5288 | return map.entry_pool + namei_entry_offs; | |
5289 | } | |
5290 | ||
5291 | /* See dw2_debug_names_iterator. */ | |
5292 | ||
5293 | dwarf2_per_cu_data * | |
5294 | dw2_debug_names_iterator::next () | |
5295 | { | |
5296 | if (m_addr == NULL) | |
5297 | return NULL; | |
5298 | ||
ed2dc618 SM |
5299 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5300 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5301 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5302 | |
5303 | again: | |
5304 | ||
5305 | unsigned int bytes_read; | |
5306 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5307 | m_addr += bytes_read; | |
5308 | if (abbrev == 0) | |
5309 | return NULL; | |
5310 | ||
5311 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5312 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5313 | { | |
b98664d3 | 5314 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5315 | "[in module %s]"), |
ed2dc618 | 5316 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5317 | return NULL; |
5318 | } | |
5319 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5320 | enum class symbol_linkage { |
5321 | unknown, | |
5322 | static_, | |
5323 | extern_, | |
23c13d42 | 5324 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5325 | dwarf2_per_cu_data *per_cu = NULL; |
5326 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5327 | { | |
5328 | ULONGEST ull; | |
5329 | switch (attr.form) | |
5330 | { | |
5331 | case DW_FORM_implicit_const: | |
5332 | ull = attr.implicit_const; | |
5333 | break; | |
5334 | case DW_FORM_flag_present: | |
5335 | ull = 1; | |
5336 | break; | |
5337 | case DW_FORM_udata: | |
5338 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5339 | m_addr += bytes_read; | |
5340 | break; | |
5341 | default: | |
b98664d3 | 5342 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5343 | dwarf_form_name (attr.form), |
ed2dc618 | 5344 | objfile_name (objfile)); |
927aa2e7 JK |
5345 | return NULL; |
5346 | } | |
5347 | switch (attr.dw_idx) | |
5348 | { | |
5349 | case DW_IDX_compile_unit: | |
5350 | /* Don't crash on bad data. */ | |
b76e467d | 5351 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5352 | { |
b98664d3 | 5353 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5354 | " [in module %s]"), |
5355 | pulongest (ull), | |
5356 | objfile_name (dwarf2_per_objfile->objfile)); | |
5357 | continue; | |
5358 | } | |
ff4c9fec | 5359 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5360 | break; |
8af5c486 JK |
5361 | case DW_IDX_type_unit: |
5362 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5363 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5364 | { |
b98664d3 | 5365 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5366 | " [in module %s]"), |
5367 | pulongest (ull), | |
5368 | objfile_name (dwarf2_per_objfile->objfile)); | |
5369 | continue; | |
5370 | } | |
ff4c9fec | 5371 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5372 | break; |
927aa2e7 JK |
5373 | case DW_IDX_GNU_internal: |
5374 | if (!m_map.augmentation_is_gdb) | |
5375 | break; | |
23c13d42 | 5376 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5377 | break; |
5378 | case DW_IDX_GNU_external: | |
5379 | if (!m_map.augmentation_is_gdb) | |
5380 | break; | |
23c13d42 | 5381 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5382 | break; |
5383 | } | |
5384 | } | |
5385 | ||
5386 | /* Skip if already read in. */ | |
5387 | if (per_cu->v.quick->compunit_symtab) | |
5388 | goto again; | |
5389 | ||
5390 | /* Check static vs global. */ | |
23c13d42 | 5391 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5392 | { |
2b79f376 | 5393 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5394 | const bool symbol_is_static = |
5395 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5396 | if (want_static != symbol_is_static) |
2b79f376 | 5397 | goto again; |
927aa2e7 JK |
5398 | } |
5399 | ||
5400 | /* Match dw2_symtab_iter_next, symbol_kind | |
5401 | and debug_names::psymbol_tag. */ | |
5402 | switch (m_domain) | |
5403 | { | |
5404 | case VAR_DOMAIN: | |
5405 | switch (indexval.dwarf_tag) | |
5406 | { | |
5407 | case DW_TAG_variable: | |
5408 | case DW_TAG_subprogram: | |
5409 | /* Some types are also in VAR_DOMAIN. */ | |
5410 | case DW_TAG_typedef: | |
5411 | case DW_TAG_structure_type: | |
5412 | break; | |
5413 | default: | |
5414 | goto again; | |
5415 | } | |
5416 | break; | |
5417 | case STRUCT_DOMAIN: | |
5418 | switch (indexval.dwarf_tag) | |
5419 | { | |
5420 | case DW_TAG_typedef: | |
5421 | case DW_TAG_structure_type: | |
5422 | break; | |
5423 | default: | |
5424 | goto again; | |
5425 | } | |
5426 | break; | |
5427 | case LABEL_DOMAIN: | |
5428 | switch (indexval.dwarf_tag) | |
5429 | { | |
5430 | case 0: | |
5431 | case DW_TAG_variable: | |
5432 | break; | |
5433 | default: | |
5434 | goto again; | |
5435 | } | |
5436 | break; | |
59c35742 AB |
5437 | case MODULE_DOMAIN: |
5438 | switch (indexval.dwarf_tag) | |
5439 | { | |
5440 | case DW_TAG_module: | |
5441 | break; | |
5442 | default: | |
5443 | goto again; | |
5444 | } | |
5445 | break; | |
927aa2e7 JK |
5446 | default: |
5447 | break; | |
5448 | } | |
5449 | ||
5450 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5451 | debug_names::psymbol_tag. */ | |
5452 | switch (m_search) | |
4b514bc8 | 5453 | { |
927aa2e7 JK |
5454 | case VARIABLES_DOMAIN: |
5455 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5456 | { |
927aa2e7 JK |
5457 | case DW_TAG_variable: |
5458 | break; | |
5459 | default: | |
5460 | goto again; | |
4b514bc8 | 5461 | } |
927aa2e7 JK |
5462 | break; |
5463 | case FUNCTIONS_DOMAIN: | |
5464 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5465 | { |
927aa2e7 JK |
5466 | case DW_TAG_subprogram: |
5467 | break; | |
5468 | default: | |
5469 | goto again; | |
4b514bc8 | 5470 | } |
927aa2e7 JK |
5471 | break; |
5472 | case TYPES_DOMAIN: | |
5473 | switch (indexval.dwarf_tag) | |
5474 | { | |
5475 | case DW_TAG_typedef: | |
5476 | case DW_TAG_structure_type: | |
5477 | break; | |
5478 | default: | |
5479 | goto again; | |
5480 | } | |
5481 | break; | |
59c35742 AB |
5482 | case MODULES_DOMAIN: |
5483 | switch (indexval.dwarf_tag) | |
5484 | { | |
5485 | case DW_TAG_module: | |
5486 | break; | |
5487 | default: | |
5488 | goto again; | |
5489 | } | |
927aa2e7 JK |
5490 | default: |
5491 | break; | |
4b514bc8 | 5492 | } |
927aa2e7 JK |
5493 | |
5494 | return per_cu; | |
4b514bc8 | 5495 | } |
61920122 | 5496 | |
927aa2e7 | 5497 | static struct compunit_symtab * |
c7f839cb | 5498 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 5499 | const char *name, domain_enum domain) |
4b514bc8 | 5500 | { |
ed2dc618 SM |
5501 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5502 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 5503 | |
927aa2e7 JK |
5504 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
5505 | if (!mapp) | |
61920122 | 5506 | { |
927aa2e7 JK |
5507 | /* index is NULL if OBJF_READNOW. */ |
5508 | return NULL; | |
5509 | } | |
5510 | const auto &map = *mapp; | |
9291a0cd | 5511 | |
2b79f376 | 5512 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 5513 | |
927aa2e7 JK |
5514 | struct compunit_symtab *stab_best = NULL; |
5515 | struct dwarf2_per_cu_data *per_cu; | |
5516 | while ((per_cu = iter.next ()) != NULL) | |
5517 | { | |
5518 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 5519 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 5520 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 5521 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 5522 | |
927aa2e7 JK |
5523 | sym = block_find_symbol (block, name, domain, |
5524 | block_find_non_opaque_type_preferred, | |
5525 | &with_opaque); | |
9703b513 | 5526 | |
927aa2e7 JK |
5527 | /* Some caution must be observed with overloaded functions and |
5528 | methods, since the index will not contain any overload | |
5529 | information (but NAME might contain it). */ | |
a3ec0bb1 | 5530 | |
927aa2e7 | 5531 | if (sym != NULL |
987012b8 | 5532 | && strcmp_iw (sym->search_name (), name) == 0) |
927aa2e7 JK |
5533 | return stab; |
5534 | if (with_opaque != NULL | |
987012b8 | 5535 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
927aa2e7 | 5536 | stab_best = stab; |
9703b513 | 5537 | |
927aa2e7 | 5538 | /* Keep looking through other CUs. */ |
9703b513 TT |
5539 | } |
5540 | ||
927aa2e7 | 5541 | return stab_best; |
9703b513 TT |
5542 | } |
5543 | ||
927aa2e7 JK |
5544 | /* This dumps minimal information about .debug_names. It is called |
5545 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5546 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5547 | |
927aa2e7 JK |
5548 | static void |
5549 | dw2_debug_names_dump (struct objfile *objfile) | |
5550 | { | |
ed2dc618 SM |
5551 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5552 | = get_dwarf2_per_objfile (objfile); | |
5553 | ||
927aa2e7 JK |
5554 | gdb_assert (dwarf2_per_objfile->using_index); |
5555 | printf_filtered (".debug_names:"); | |
5556 | if (dwarf2_per_objfile->debug_names_table) | |
5557 | printf_filtered (" exists\n"); | |
5558 | else | |
5559 | printf_filtered (" faked for \"readnow\"\n"); | |
5560 | printf_filtered ("\n"); | |
9291a0cd TT |
5561 | } |
5562 | ||
9291a0cd | 5563 | static void |
927aa2e7 JK |
5564 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
5565 | const char *func_name) | |
9291a0cd | 5566 | { |
ed2dc618 SM |
5567 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5568 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 5569 | |
927aa2e7 JK |
5570 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
5571 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 5572 | { |
927aa2e7 | 5573 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 5574 | |
2b79f376 | 5575 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 5576 | |
927aa2e7 JK |
5577 | struct dwarf2_per_cu_data *per_cu; |
5578 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 5579 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
5580 | } |
5581 | } | |
24c79950 | 5582 | |
3b00ef10 TT |
5583 | static void |
5584 | dw2_debug_names_map_matching_symbols | |
5585 | (struct objfile *objfile, | |
5586 | const lookup_name_info &name, domain_enum domain, | |
5587 | int global, | |
5588 | gdb::function_view<symbol_found_callback_ftype> callback, | |
5589 | symbol_compare_ftype *ordered_compare) | |
5590 | { | |
5591 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
5592 | = get_dwarf2_per_objfile (objfile); | |
5593 | ||
5594 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
5595 | if (!dwarf2_per_objfile->debug_names_table) | |
5596 | return; | |
5597 | ||
5598 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
5599 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
5600 | ||
5601 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5602 | auto matcher = [&] (const char *symname) | |
5603 | { | |
5604 | if (ordered_compare == nullptr) | |
5605 | return true; | |
5606 | return ordered_compare (symname, match_name) == 0; | |
5607 | }; | |
5608 | ||
5609 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
5610 | [&] (offset_type namei) | |
5611 | { | |
5612 | /* The name was matched, now expand corresponding CUs that were | |
5613 | marked. */ | |
5614 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
5615 | ||
5616 | struct dwarf2_per_cu_data *per_cu; | |
5617 | while ((per_cu = iter.next ()) != NULL) | |
5618 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
5619 | return true; | |
5620 | }); | |
5621 | ||
5622 | /* It's a shame we couldn't do this inside the | |
5623 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
5624 | that have already been expanded. Instead, this loop matches what | |
5625 | the psymtab code does. */ | |
5626 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
5627 | { | |
5628 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
5629 | if (cust != nullptr) | |
5630 | { | |
5631 | const struct block *block | |
5632 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
5633 | if (!iterate_over_symbols_terminated (block, name, | |
5634 | domain, callback)) | |
5635 | break; | |
5636 | } | |
5637 | } | |
5638 | } | |
5639 | ||
927aa2e7 JK |
5640 | static void |
5641 | dw2_debug_names_expand_symtabs_matching | |
5642 | (struct objfile *objfile, | |
5643 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5644 | const lookup_name_info &lookup_name, | |
5645 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5646 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5647 | enum search_domain kind) | |
5648 | { | |
ed2dc618 SM |
5649 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5650 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 5651 | |
927aa2e7 JK |
5652 | /* debug_names_table is NULL if OBJF_READNOW. */ |
5653 | if (!dwarf2_per_objfile->debug_names_table) | |
5654 | return; | |
9291a0cd | 5655 | |
ed2dc618 | 5656 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 5657 | |
44ed8f3e | 5658 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 5659 | |
44ed8f3e PA |
5660 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
5661 | symbol_matcher, | |
5662 | kind, [&] (offset_type namei) | |
927aa2e7 | 5663 | { |
927aa2e7 JK |
5664 | /* The name was matched, now expand corresponding CUs that were |
5665 | marked. */ | |
5666 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 5667 | |
927aa2e7 JK |
5668 | struct dwarf2_per_cu_data *per_cu; |
5669 | while ((per_cu = iter.next ()) != NULL) | |
5670 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
5671 | expansion_notify); | |
3b00ef10 | 5672 | return true; |
44ed8f3e | 5673 | }); |
9291a0cd TT |
5674 | } |
5675 | ||
927aa2e7 | 5676 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
5677 | { |
5678 | dw2_has_symbols, | |
5679 | dw2_find_last_source_symtab, | |
5680 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5681 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 5682 | dw2_debug_names_lookup_symbol, |
9291a0cd | 5683 | dw2_print_stats, |
927aa2e7 | 5684 | dw2_debug_names_dump, |
927aa2e7 | 5685 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 5686 | dw2_expand_all_symtabs, |
652a8996 | 5687 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 5688 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 5689 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 5690 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5691 | NULL, |
9291a0cd TT |
5692 | dw2_map_symbol_filenames |
5693 | }; | |
5694 | ||
4485a1c1 SM |
5695 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5696 | to either a dwarf2_per_objfile or dwz_file object. */ | |
5697 | ||
5698 | template <typename T> | |
5699 | static gdb::array_view<const gdb_byte> | |
5700 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5701 | { | |
5702 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5703 | ||
96b79293 | 5704 | if (section->empty ()) |
4485a1c1 SM |
5705 | return {}; |
5706 | ||
5707 | /* Older elfutils strip versions could keep the section in the main | |
5708 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5709 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5710 | return {}; |
5711 | ||
96b79293 | 5712 | section->read (obj); |
4485a1c1 | 5713 | |
8bebfcda PA |
5714 | /* dwarf2_section_info::size is a bfd_size_type, while |
5715 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5716 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5717 | is 32-bit. So we need an explicit narrowing conversion here. | |
5718 | This is fine, because it's impossible to allocate or mmap an | |
5719 | array/buffer larger than what size_t can represent. */ | |
5720 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5721 | } |
5722 | ||
87d6a7aa SM |
5723 | /* Lookup the index cache for the contents of the index associated to |
5724 | DWARF2_OBJ. */ | |
5725 | ||
5726 | static gdb::array_view<const gdb_byte> | |
5727 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
5728 | { | |
5729 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5730 | if (build_id == nullptr) | |
5731 | return {}; | |
5732 | ||
5733 | return global_index_cache.lookup_gdb_index (build_id, | |
5734 | &dwarf2_obj->index_cache_res); | |
5735 | } | |
5736 | ||
5737 | /* Same as the above, but for DWZ. */ | |
5738 | ||
5739 | static gdb::array_view<const gdb_byte> | |
5740 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5741 | { | |
5742 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5743 | if (build_id == nullptr) | |
5744 | return {}; | |
5745 | ||
5746 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5747 | } | |
5748 | ||
3c0aa29a | 5749 | /* See symfile.h. */ |
9291a0cd | 5750 | |
3c0aa29a PA |
5751 | bool |
5752 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 5753 | { |
ed2dc618 SM |
5754 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5755 | = get_dwarf2_per_objfile (objfile); | |
5756 | ||
9291a0cd TT |
5757 | /* If we're about to read full symbols, don't bother with the |
5758 | indices. In this case we also don't care if some other debug | |
5759 | format is making psymtabs, because they are all about to be | |
5760 | expanded anyway. */ | |
5761 | if ((objfile->flags & OBJF_READNOW)) | |
5762 | { | |
9291a0cd | 5763 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
5764 | create_all_comp_units (dwarf2_per_objfile); |
5765 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
5766 | dwarf2_per_objfile->quick_file_names_table |
5767 | = create_quick_file_names_table | |
5768 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 5769 | |
b76e467d | 5770 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5771 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 5772 | { |
ff4c9fec | 5773 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 5774 | |
e254ef6a DE |
5775 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5776 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5777 | } |
5778 | ||
5779 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5780 | these functions will be no-ops because we will have expanded | |
5781 | all symtabs. */ | |
3c0aa29a PA |
5782 | *index_kind = dw_index_kind::GDB_INDEX; |
5783 | return true; | |
9291a0cd TT |
5784 | } |
5785 | ||
ed2dc618 | 5786 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
5787 | { |
5788 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
5789 | return true; | |
5790 | } | |
927aa2e7 | 5791 | |
4485a1c1 SM |
5792 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
5793 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
5794 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
5795 | { |
5796 | *index_kind = dw_index_kind::GDB_INDEX; | |
5797 | return true; | |
5798 | } | |
9291a0cd | 5799 | |
87d6a7aa SM |
5800 | /* ... otherwise, try to find the index in the index cache. */ |
5801 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
5802 | get_gdb_index_contents_from_cache, | |
5803 | get_gdb_index_contents_from_cache_dwz)) | |
5804 | { | |
5805 | global_index_cache.hit (); | |
5806 | *index_kind = dw_index_kind::GDB_INDEX; | |
5807 | return true; | |
5808 | } | |
5809 | ||
5810 | global_index_cache.miss (); | |
3c0aa29a | 5811 | return false; |
9291a0cd TT |
5812 | } |
5813 | ||
5814 | \f | |
5815 | ||
dce234bc PP |
5816 | /* Build a partial symbol table. */ |
5817 | ||
5818 | void | |
f29dff0a | 5819 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5820 | { |
ed2dc618 SM |
5821 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5822 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 5823 | |
6eee24ce | 5824 | init_psymbol_list (objfile, 1024); |
c906108c | 5825 | |
a70b8144 | 5826 | try |
c9bf0622 TT |
5827 | { |
5828 | /* This isn't really ideal: all the data we allocate on the | |
5829 | objfile's obstack is still uselessly kept around. However, | |
5830 | freeing it seems unsafe. */ | |
906768f9 | 5831 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 5832 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 5833 | psymtabs.keep (); |
87d6a7aa SM |
5834 | |
5835 | /* (maybe) store an index in the cache. */ | |
5836 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 5837 | } |
230d2906 | 5838 | catch (const gdb_exception_error &except) |
492d29ea PA |
5839 | { |
5840 | exception_print (gdb_stderr, except); | |
5841 | } | |
c906108c | 5842 | } |
c906108c | 5843 | |
3b80fe9b DE |
5844 | /* Find the base address of the compilation unit for range lists and |
5845 | location lists. It will normally be specified by DW_AT_low_pc. | |
5846 | In DWARF-3 draft 4, the base address could be overridden by | |
5847 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5848 | compilation units with discontinuous ranges. */ | |
5849 | ||
5850 | static void | |
5851 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5852 | { | |
5853 | struct attribute *attr; | |
5854 | ||
5855 | cu->base_known = 0; | |
5856 | cu->base_address = 0; | |
5857 | ||
5858 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5859 | if (attr != nullptr) |
3b80fe9b | 5860 | { |
cd6c91b4 | 5861 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5862 | cu->base_known = 1; |
5863 | } | |
5864 | else | |
5865 | { | |
5866 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5867 | if (attr != nullptr) |
3b80fe9b | 5868 | { |
cd6c91b4 | 5869 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5870 | cu->base_known = 1; |
5871 | } | |
5872 | } | |
5873 | } | |
5874 | ||
36586728 TT |
5875 | /* Helper function that returns the proper abbrev section for |
5876 | THIS_CU. */ | |
5877 | ||
5878 | static struct dwarf2_section_info * | |
5879 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5880 | { | |
5881 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 5882 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
5883 | |
5884 | if (this_cu->is_dwz) | |
ed2dc618 | 5885 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
5886 | else |
5887 | abbrev = &dwarf2_per_objfile->abbrev; | |
5888 | ||
5889 | return abbrev; | |
5890 | } | |
5891 | ||
f4dc4d17 DE |
5892 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5893 | ||
5894 | static sect_offset | |
ed2dc618 SM |
5895 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5896 | struct dwarf2_section_info *section, | |
9c541725 | 5897 | sect_offset sect_off) |
f4dc4d17 | 5898 | { |
96b79293 | 5899 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5900 | const gdb_byte *info_ptr; |
ac298888 | 5901 | unsigned int initial_length_size, offset_size; |
43988095 | 5902 | uint16_t version; |
f4dc4d17 | 5903 | |
96b79293 | 5904 | section->read (dwarf2_per_objfile->objfile); |
9c541725 | 5905 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5906 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5907 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5908 | info_ptr += initial_length_size; |
5909 | ||
5910 | version = read_2_bytes (abfd, info_ptr); | |
5911 | info_ptr += 2; | |
5912 | if (version >= 5) | |
5913 | { | |
5914 | /* Skip unit type and address size. */ | |
5915 | info_ptr += 2; | |
5916 | } | |
5917 | ||
24aa364d | 5918 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5919 | } |
5920 | ||
aaa75496 JB |
5921 | /* Allocate a new partial symtab for file named NAME and mark this new |
5922 | partial symtab as being an include of PST. */ | |
5923 | ||
5924 | static void | |
891813be | 5925 | dwarf2_create_include_psymtab (const char *name, dwarf2_psymtab *pst, |
aaa75496 JB |
5926 | struct objfile *objfile) |
5927 | { | |
891813be | 5928 | dwarf2_psymtab *subpst = new dwarf2_psymtab (name, objfile); |
aaa75496 | 5929 | |
fbd9ab74 JK |
5930 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5931 | { | |
5932 | /* It shares objfile->objfile_obstack. */ | |
5933 | subpst->dirname = pst->dirname; | |
5934 | } | |
5935 | ||
a9342b62 | 5936 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
5937 | subpst->dependencies[0] = pst; |
5938 | subpst->number_of_dependencies = 1; | |
5939 | ||
aaa75496 JB |
5940 | /* No private part is necessary for include psymtabs. This property |
5941 | can be used to differentiate between such include psymtabs and | |
10b3939b | 5942 | the regular ones. */ |
891813be | 5943 | subpst->per_cu_data = nullptr; |
aaa75496 JB |
5944 | } |
5945 | ||
5946 | /* Read the Line Number Program data and extract the list of files | |
5947 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5948 | partial symtab for each of these included files. */ |
aaa75496 JB |
5949 | |
5950 | static void | |
5951 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 5952 | struct die_info *die, |
891813be | 5953 | dwarf2_psymtab *pst) |
aaa75496 | 5954 | { |
fff8551c | 5955 | line_header_up lh; |
d85a05f0 | 5956 | struct attribute *attr; |
aaa75496 | 5957 | |
d85a05f0 | 5958 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
435d3d88 | 5959 | if (attr != nullptr) |
9c541725 | 5960 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5961 | if (lh == NULL) |
5962 | return; /* No linetable, so no includes. */ | |
5963 | ||
79748972 TT |
5964 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
5965 | that we pass in the raw text_low here; that is ok because we're | |
5966 | only decoding the line table to make include partial symtabs, and | |
5967 | so the addresses aren't really used. */ | |
4ae976d1 | 5968 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 5969 | pst->raw_text_low (), 1); |
aaa75496 JB |
5970 | } |
5971 | ||
348e048f | 5972 | static hashval_t |
52dc124a | 5973 | hash_signatured_type (const void *item) |
348e048f | 5974 | { |
9a3c8263 SM |
5975 | const struct signatured_type *sig_type |
5976 | = (const struct signatured_type *) item; | |
9a619af0 | 5977 | |
348e048f | 5978 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5979 | return sig_type->signature; |
348e048f DE |
5980 | } |
5981 | ||
5982 | static int | |
52dc124a | 5983 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5984 | { |
9a3c8263 SM |
5985 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5986 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5987 | |
348e048f DE |
5988 | return lhs->signature == rhs->signature; |
5989 | } | |
5990 | ||
1fd400ff TT |
5991 | /* Allocate a hash table for signatured types. */ |
5992 | ||
b0b6a987 | 5993 | static htab_up |
298e9637 | 5994 | allocate_signatured_type_table () |
1fd400ff | 5995 | { |
b0b6a987 TT |
5996 | return htab_up (htab_create_alloc (41, |
5997 | hash_signatured_type, | |
5998 | eq_signatured_type, | |
5999 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
6000 | } |
6001 | ||
d467dd73 | 6002 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6003 | |
6004 | static int | |
d467dd73 | 6005 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6006 | { |
9a3c8263 | 6007 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6008 | std::vector<signatured_type *> *all_type_units |
6009 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6010 | |
b2bdb8cf | 6011 | all_type_units->push_back (sigt); |
1fd400ff TT |
6012 | |
6013 | return 1; | |
6014 | } | |
6015 | ||
78d4d2c5 | 6016 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6017 | and fill them into TYPES_HTAB. It will process only type units, |
6018 | therefore DW_UT_type. */ | |
c88ee1f0 | 6019 | |
78d4d2c5 | 6020 | static void |
ed2dc618 SM |
6021 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6022 | struct dwo_file *dwo_file, | |
b0b6a987 | 6023 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 6024 | rcuh_kind section_kind) |
348e048f | 6025 | { |
3019eac3 | 6026 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6027 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6028 | bfd *abfd; |
6029 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6030 | |
4bdcc0c1 DE |
6031 | abbrev_section = (dwo_file != NULL |
6032 | ? &dwo_file->sections.abbrev | |
6033 | : &dwarf2_per_objfile->abbrev); | |
6034 | ||
b4f54984 | 6035 | if (dwarf_read_debug) |
43988095 | 6036 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
96b79293 TT |
6037 | section->get_name (), |
6038 | abbrev_section->get_file_name ()); | |
09406207 | 6039 | |
96b79293 | 6040 | section->read (objfile); |
78d4d2c5 | 6041 | info_ptr = section->buffer; |
348e048f | 6042 | |
78d4d2c5 JK |
6043 | if (info_ptr == NULL) |
6044 | return; | |
348e048f | 6045 | |
78d4d2c5 JK |
6046 | /* We can't set abfd until now because the section may be empty or |
6047 | not present, in which case the bfd is unknown. */ | |
96b79293 | 6048 | abfd = section->get_bfd_owner (); |
348e048f | 6049 | |
c0ab21c2 TT |
6050 | /* We don't use cutu_reader here because we don't need to read |
6051 | any dies: the signature is in the header. */ | |
3019eac3 | 6052 | |
78d4d2c5 JK |
6053 | end_ptr = info_ptr + section->size; |
6054 | while (info_ptr < end_ptr) | |
6055 | { | |
78d4d2c5 JK |
6056 | struct signatured_type *sig_type; |
6057 | struct dwo_unit *dwo_tu; | |
6058 | void **slot; | |
6059 | const gdb_byte *ptr = info_ptr; | |
6060 | struct comp_unit_head header; | |
6061 | unsigned int length; | |
8b70b953 | 6062 | |
9c541725 | 6063 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6064 | |
a49dd8dd JK |
6065 | /* Initialize it due to a false compiler warning. */ |
6066 | header.signature = -1; | |
9c541725 | 6067 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6068 | |
78d4d2c5 JK |
6069 | /* We need to read the type's signature in order to build the hash |
6070 | table, but we don't need anything else just yet. */ | |
348e048f | 6071 | |
ed2dc618 | 6072 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6073 | abbrev_section, ptr, section_kind); |
348e048f | 6074 | |
4057dfde | 6075 | length = header.get_length (); |
6caca83c | 6076 | |
78d4d2c5 JK |
6077 | /* Skip dummy type units. */ |
6078 | if (ptr >= info_ptr + length | |
43988095 JK |
6079 | || peek_abbrev_code (abfd, ptr) == 0 |
6080 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6081 | { |
6082 | info_ptr += length; | |
6083 | continue; | |
6084 | } | |
dee91e82 | 6085 | |
78d4d2c5 JK |
6086 | if (types_htab == NULL) |
6087 | { | |
6088 | if (dwo_file) | |
298e9637 | 6089 | types_htab = allocate_dwo_unit_table (); |
78d4d2c5 | 6090 | else |
298e9637 | 6091 | types_htab = allocate_signatured_type_table (); |
78d4d2c5 | 6092 | } |
8b70b953 | 6093 | |
78d4d2c5 JK |
6094 | if (dwo_file) |
6095 | { | |
6096 | sig_type = NULL; | |
6097 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6098 | struct dwo_unit); | |
6099 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6100 | dwo_tu->signature = header.signature; |
9c541725 | 6101 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6102 | dwo_tu->section = section; |
9c541725 | 6103 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6104 | dwo_tu->length = length; |
6105 | } | |
6106 | else | |
6107 | { | |
6108 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6109 | The real type_offset is in the DWO file. */ | |
6110 | dwo_tu = NULL; | |
6111 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6112 | struct signatured_type); | |
43988095 | 6113 | sig_type->signature = header.signature; |
9c541725 | 6114 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6115 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6116 | sig_type->per_cu.is_debug_types = 1; |
6117 | sig_type->per_cu.section = section; | |
9c541725 | 6118 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6119 | sig_type->per_cu.length = length; |
6120 | } | |
6121 | ||
b0b6a987 | 6122 | slot = htab_find_slot (types_htab.get (), |
78d4d2c5 JK |
6123 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
6124 | INSERT); | |
6125 | gdb_assert (slot != NULL); | |
6126 | if (*slot != NULL) | |
6127 | { | |
9c541725 | 6128 | sect_offset dup_sect_off; |
0349ea22 | 6129 | |
3019eac3 DE |
6130 | if (dwo_file) |
6131 | { | |
78d4d2c5 JK |
6132 | const struct dwo_unit *dup_tu |
6133 | = (const struct dwo_unit *) *slot; | |
6134 | ||
9c541725 | 6135 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6136 | } |
6137 | else | |
6138 | { | |
78d4d2c5 JK |
6139 | const struct signatured_type *dup_tu |
6140 | = (const struct signatured_type *) *slot; | |
6141 | ||
9c541725 | 6142 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6143 | } |
8b70b953 | 6144 | |
b98664d3 | 6145 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6146 | " the entry at offset %s, signature %s"), |
6147 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6148 | hex_string (header.signature)); |
78d4d2c5 JK |
6149 | } |
6150 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6151 | |
78d4d2c5 | 6152 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6153 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6154 | sect_offset_str (sect_off), | |
43988095 | 6155 | hex_string (header.signature)); |
3019eac3 | 6156 | |
78d4d2c5 JK |
6157 | info_ptr += length; |
6158 | } | |
6159 | } | |
3019eac3 | 6160 | |
78d4d2c5 JK |
6161 | /* Create the hash table of all entries in the .debug_types |
6162 | (or .debug_types.dwo) section(s). | |
6163 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6164 | otherwise it is NULL. | |
b3c8eb43 | 6165 | |
78d4d2c5 | 6166 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6167 | |
78d4d2c5 | 6168 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6169 | |
78d4d2c5 | 6170 | static void |
ed2dc618 SM |
6171 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6172 | struct dwo_file *dwo_file, | |
fd5866f6 | 6173 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 6174 | htab_up &types_htab) |
78d4d2c5 | 6175 | { |
fd5866f6 SM |
6176 | for (dwarf2_section_info §ion : type_sections) |
6177 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6178 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6179 | } |
6180 | ||
6181 | /* Create the hash table of all entries in the .debug_types section, | |
6182 | and initialize all_type_units. | |
6183 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6184 | otherwise non-zero. */ | |
6185 | ||
6186 | static int | |
ed2dc618 | 6187 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6188 | { |
b0b6a987 | 6189 | htab_up types_htab; |
3019eac3 | 6190 | |
ed2dc618 SM |
6191 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6192 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6193 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6194 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6195 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6196 | if (types_htab == NULL) |
6197 | { | |
6198 | dwarf2_per_objfile->signatured_types = NULL; | |
6199 | return 0; | |
6200 | } | |
6201 | ||
b0b6a987 | 6202 | dwarf2_per_objfile->signatured_types = std::move (types_htab); |
348e048f | 6203 | |
b2bdb8cf | 6204 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
b0b6a987 TT |
6205 | dwarf2_per_objfile->all_type_units.reserve |
6206 | (htab_elements (dwarf2_per_objfile->signatured_types.get ())); | |
b2bdb8cf | 6207 | |
b0b6a987 TT |
6208 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types.get (), |
6209 | add_signatured_type_cu_to_table, | |
b2bdb8cf | 6210 | &dwarf2_per_objfile->all_type_units); |
1fd400ff | 6211 | |
348e048f DE |
6212 | return 1; |
6213 | } | |
6214 | ||
6aa5f3a6 DE |
6215 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6216 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6217 | Otherwise we find one. */ | |
6218 | ||
6219 | static struct signatured_type * | |
ed2dc618 SM |
6220 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6221 | void **slot) | |
6aa5f3a6 DE |
6222 | { |
6223 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6224 | |
b2bdb8cf SM |
6225 | if (dwarf2_per_objfile->all_type_units.size () |
6226 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6227 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6228 | |
b2bdb8cf SM |
6229 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6230 | struct signatured_type); | |
6231 | ||
6232 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6233 | sig_type->signature = sig; |
6234 | sig_type->per_cu.is_debug_types = 1; | |
6235 | if (dwarf2_per_objfile->using_index) | |
6236 | { | |
6237 | sig_type->per_cu.v.quick = | |
6238 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6239 | struct dwarf2_per_cu_quick_data); | |
6240 | } | |
6241 | ||
6242 | if (slot == NULL) | |
6243 | { | |
b0b6a987 | 6244 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 DE |
6245 | sig_type, INSERT); |
6246 | } | |
6247 | gdb_assert (*slot == NULL); | |
6248 | *slot = sig_type; | |
6249 | /* The rest of sig_type must be filled in by the caller. */ | |
6250 | return sig_type; | |
6251 | } | |
6252 | ||
a2ce51a0 DE |
6253 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6254 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6255 | ||
6256 | static void | |
ed2dc618 | 6257 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6258 | struct signatured_type *sig_entry, |
6259 | struct dwo_unit *dwo_entry) | |
6260 | { | |
7ee85ab1 | 6261 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6262 | gdb_assert (! sig_entry->per_cu.queued); |
6263 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6264 | if (dwarf2_per_objfile->using_index) |
6265 | { | |
6266 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6267 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6268 | } |
6269 | else | |
6270 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6271 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6272 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6273 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6274 | gdb_assert (sig_entry->dwo_unit == NULL); |
6275 | ||
6276 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6277 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6278 | sig_entry->per_cu.length = dwo_entry->length; |
6279 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6280 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6281 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6282 | sig_entry->dwo_unit = dwo_entry; | |
6283 | } | |
6284 | ||
6285 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6286 | If we haven't read the TU yet, create the signatured_type data structure |
6287 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6288 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6289 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6290 | containing that CU. Otherwise we could end up reading several other DWO | |
6291 | files (due to comdat folding) to process the transitive closure of all the | |
6292 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6293 | type signature that it needs. | |
a2ce51a0 DE |
6294 | We only do this for .gdb_index because in the psymtab case we already have |
6295 | to read all the DWOs to build the type unit groups. */ | |
6296 | ||
6297 | static struct signatured_type * | |
6298 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6299 | { | |
518817b3 SM |
6300 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6301 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6302 | struct dwo_file *dwo_file; |
6303 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6304 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6305 | void **slot; |
a2ce51a0 DE |
6306 | |
6307 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6308 | ||
6aa5f3a6 DE |
6309 | /* If TU skeletons have been removed then we may not have read in any |
6310 | TUs yet. */ | |
6311 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6312 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 DE |
6313 | |
6314 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6315 | Use the global signatured_types array to do our own comdat-folding |
6316 | of types. If this is the first time we're reading this TU, and | |
6317 | the TU has an entry in .gdb_index, replace the recorded data from | |
6318 | .gdb_index with this TU. */ | |
a2ce51a0 | 6319 | |
a2ce51a0 | 6320 | find_sig_entry.signature = sig; |
b0b6a987 | 6321 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6322 | &find_sig_entry, INSERT); |
9a3c8263 | 6323 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6324 | |
6325 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6326 | read. Don't reassign the global entry to point to this DWO if that's |
6327 | the case. Also note that if the TU is already being read, it may not | |
6328 | have come from a DWO, the program may be a mix of Fission-compiled | |
6329 | code and non-Fission-compiled code. */ | |
6330 | ||
6331 | /* Have we already tried to read this TU? | |
6332 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6333 | needn't exist in the global table yet). */ | |
6334 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6335 | return sig_entry; |
6336 | ||
6aa5f3a6 DE |
6337 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6338 | dwo_unit of the TU itself. */ | |
6339 | dwo_file = cu->dwo_unit->dwo_file; | |
6340 | ||
a2ce51a0 DE |
6341 | /* Ok, this is the first time we're reading this TU. */ |
6342 | if (dwo_file->tus == NULL) | |
6343 | return NULL; | |
6344 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6345 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6346 | &find_dwo_entry); | |
a2ce51a0 DE |
6347 | if (dwo_entry == NULL) |
6348 | return NULL; | |
6349 | ||
6aa5f3a6 DE |
6350 | /* If the global table doesn't have an entry for this TU, add one. */ |
6351 | if (sig_entry == NULL) | |
ed2dc618 | 6352 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 6353 | |
ed2dc618 | 6354 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 6355 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6356 | return sig_entry; |
6357 | } | |
6358 | ||
a2ce51a0 DE |
6359 | /* Subroutine of lookup_signatured_type. |
6360 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6361 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6362 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6363 | |
6364 | static struct signatured_type * | |
6365 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6366 | { | |
518817b3 SM |
6367 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6368 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6369 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
6370 | struct dwo_unit *dwo_entry; |
6371 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6372 | void **slot; |
a2ce51a0 DE |
6373 | |
6374 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6375 | gdb_assert (dwp_file != NULL); | |
6376 | ||
6aa5f3a6 DE |
6377 | /* If TU skeletons have been removed then we may not have read in any |
6378 | TUs yet. */ | |
6379 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6380 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 | 6381 | |
6aa5f3a6 | 6382 | find_sig_entry.signature = sig; |
b0b6a987 | 6383 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6384 | &find_sig_entry, INSERT); |
9a3c8263 | 6385 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6386 | |
6387 | /* Have we already tried to read this TU? | |
6388 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6389 | needn't exist in the global table yet). */ | |
6390 | if (sig_entry != NULL) | |
6391 | return sig_entry; | |
6392 | ||
a2ce51a0 DE |
6393 | if (dwp_file->tus == NULL) |
6394 | return NULL; | |
ed2dc618 | 6395 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 6396 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
6397 | if (dwo_entry == NULL) |
6398 | return NULL; | |
6399 | ||
ed2dc618 SM |
6400 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6401 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6402 | |
a2ce51a0 DE |
6403 | return sig_entry; |
6404 | } | |
6405 | ||
380bca97 | 6406 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6407 | Returns NULL if signature SIG is not present in the table. |
6408 | It is up to the caller to complain about this. */ | |
348e048f DE |
6409 | |
6410 | static struct signatured_type * | |
a2ce51a0 | 6411 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6412 | { |
518817b3 SM |
6413 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6414 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6415 | |
a2ce51a0 DE |
6416 | if (cu->dwo_unit |
6417 | && dwarf2_per_objfile->using_index) | |
6418 | { | |
6419 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6420 | These cases require special processing. */ | |
ed2dc618 | 6421 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
6422 | return lookup_dwo_signatured_type (cu, sig); |
6423 | else | |
6424 | return lookup_dwp_signatured_type (cu, sig); | |
6425 | } | |
6426 | else | |
6427 | { | |
6428 | struct signatured_type find_entry, *entry; | |
348e048f | 6429 | |
a2ce51a0 DE |
6430 | if (dwarf2_per_objfile->signatured_types == NULL) |
6431 | return NULL; | |
6432 | find_entry.signature = sig; | |
9a3c8263 | 6433 | entry = ((struct signatured_type *) |
b0b6a987 TT |
6434 | htab_find (dwarf2_per_objfile->signatured_types.get (), |
6435 | &find_entry)); | |
a2ce51a0 DE |
6436 | return entry; |
6437 | } | |
348e048f | 6438 | } |
18a8505e AT |
6439 | |
6440 | /* Return the address base of the compile unit, which, if exists, is stored | |
6441 | either at the attribute DW_AT_GNU_addr_base, or DW_AT_addr_base. */ | |
6442 | static gdb::optional<ULONGEST> | |
6443 | lookup_addr_base (struct die_info *comp_unit_die) | |
6444 | { | |
6445 | struct attribute *attr; | |
6446 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_addr_base); | |
6447 | if (attr == nullptr) | |
6448 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_addr_base); | |
6449 | if (attr == nullptr) | |
6450 | return gdb::optional<ULONGEST> (); | |
6451 | return DW_UNSND (attr); | |
6452 | } | |
6453 | ||
6454 | /* Return range lists base of the compile unit, which, if exists, is stored | |
6455 | either at the attribute DW_AT_rnglists_base or DW_AT_GNU_ranges_base. */ | |
6456 | static ULONGEST | |
6457 | lookup_ranges_base (struct die_info *comp_unit_die) | |
6458 | { | |
6459 | struct attribute *attr; | |
6460 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_rnglists_base); | |
6461 | if (attr == nullptr) | |
6462 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_ranges_base); | |
6463 | if (attr == nullptr) | |
6464 | return 0; | |
6465 | return DW_UNSND (attr); | |
6466 | } | |
6467 | ||
42e7ad6c | 6468 | /* Low level DIE reading support. */ |
348e048f | 6469 | |
d85a05f0 DJ |
6470 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6471 | ||
6472 | static void | |
6473 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6474 | struct dwarf2_cu *cu, |
3019eac3 | 6475 | struct dwarf2_section_info *section, |
685af9cd TT |
6476 | struct dwo_file *dwo_file, |
6477 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6478 | { |
fceca515 | 6479 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6480 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6481 | reader->cu = cu; |
3019eac3 | 6482 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6483 | reader->die_section = section; |
6484 | reader->buffer = section->buffer; | |
f664829e | 6485 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6486 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6487 | } |
6488 | ||
c0ab21c2 | 6489 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6490 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6491 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6492 | already. |
6493 | ||
6494 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6495 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6496 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6497 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6498 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6499 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6500 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6501 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6502 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6503 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6504 | kept around for at least as long as *RESULT_READER. | |
6505 | ||
b0c7bfa9 DE |
6506 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6507 | ||
6508 | static int | |
6509 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6510 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 6511 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6512 | const char *stub_comp_dir, |
b0c7bfa9 | 6513 | struct die_reader_specs *result_reader, |
d521ce57 | 6514 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6515 | struct die_info **result_comp_unit_die, |
685af9cd | 6516 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6517 | { |
ed2dc618 | 6518 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
6519 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6520 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6521 | bfd *abfd; |
d521ce57 | 6522 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6523 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6524 | int i,num_extra_attrs; | |
6525 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6526 | struct die_info *comp_unit_die; |
6527 | ||
b0aeadb3 DE |
6528 | /* At most one of these may be provided. */ |
6529 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6530 | |
b0c7bfa9 DE |
6531 | /* These attributes aren't processed until later: |
6532 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6533 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6534 | referenced later. However, these attributes are found in the stub | |
6535 | which we won't have later. In order to not impose this complication | |
6536 | on the rest of the code, we read them here and copy them to the | |
6537 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6538 | |
6539 | stmt_list = NULL; | |
6540 | low_pc = NULL; | |
6541 | high_pc = NULL; | |
6542 | ranges = NULL; | |
6543 | comp_dir = NULL; | |
6544 | ||
6545 | if (stub_comp_unit_die != NULL) | |
6546 | { | |
6547 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6548 | DWO file. */ | |
6549 | if (! this_cu->is_debug_types) | |
6550 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6551 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6552 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6553 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6554 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6555 | ||
18a8505e | 6556 | cu->addr_base = lookup_addr_base (stub_comp_unit_die); |
b0c7bfa9 | 6557 | |
18a8505e AT |
6558 | /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute |
6559 | here (if needed). We need the value before we can process | |
6560 | DW_AT_ranges. */ | |
6561 | cu->ranges_base = lookup_ranges_base (stub_comp_unit_die); | |
b0c7bfa9 | 6562 | } |
a2ce51a0 DE |
6563 | else if (stub_comp_dir != NULL) |
6564 | { | |
6565 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6566 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6567 | comp_dir->name = DW_AT_comp_dir; |
6568 | comp_dir->form = DW_FORM_string; | |
6569 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6570 | DW_STRING (comp_dir) = stub_comp_dir; | |
6571 | } | |
b0c7bfa9 DE |
6572 | |
6573 | /* Set up for reading the DWO CU/TU. */ | |
6574 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6575 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6576 | section->read (objfile); |
6577 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6578 | begin_info_ptr = info_ptr = (section->buffer |
6579 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6580 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
6581 | |
6582 | if (this_cu->is_debug_types) | |
6583 | { | |
b0c7bfa9 DE |
6584 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6585 | ||
ed2dc618 SM |
6586 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6587 | &cu->header, section, | |
b0c7bfa9 | 6588 | dwo_abbrev_section, |
43988095 | 6589 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6590 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6591 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6592 | { |
6593 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6594 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6595 | hex_string (sig_type->signature), |
43988095 | 6596 | hex_string (cu->header.signature), |
9d8780f0 | 6597 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6598 | bfd_get_filename (abfd)); |
6599 | } | |
9c541725 | 6600 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6601 | /* For DWOs coming from DWP files, we don't know the CU length |
6602 | nor the type's offset in the TU until now. */ | |
4057dfde | 6603 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6604 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6605 | |
6606 | /* Establish the type offset that can be used to lookup the type. | |
6607 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6608 | sig_type->type_offset_in_section |
6609 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6610 | } |
6611 | else | |
6612 | { | |
ed2dc618 SM |
6613 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6614 | &cu->header, section, | |
b0c7bfa9 | 6615 | dwo_abbrev_section, |
43988095 | 6616 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6617 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6618 | /* For DWOs coming from DWP files, we don't know the CU length |
6619 | until now. */ | |
4057dfde | 6620 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6621 | } |
6622 | ||
685af9cd | 6623 | *result_dwo_abbrev_table |
86de1d91 TT |
6624 | = abbrev_table::read (objfile, dwo_abbrev_section, |
6625 | cu->header.abbrev_sect_off); | |
685af9cd TT |
6626 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6627 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6628 | |
6629 | /* Read in the die, but leave space to copy over the attributes | |
6630 | from the stub. This has the benefit of simplifying the rest of | |
6631 | the code - all the work to maintain the illusion of a single | |
6632 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6633 | num_extra_attrs = ((stmt_list != NULL) | |
6634 | + (low_pc != NULL) | |
6635 | + (high_pc != NULL) | |
6636 | + (ranges != NULL) | |
6637 | + (comp_dir != NULL)); | |
6638 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6639 | num_extra_attrs); |
b0c7bfa9 DE |
6640 | |
6641 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6642 | comp_unit_die = *result_comp_unit_die; | |
6643 | i = comp_unit_die->num_attrs; | |
6644 | if (stmt_list != NULL) | |
6645 | comp_unit_die->attrs[i++] = *stmt_list; | |
6646 | if (low_pc != NULL) | |
6647 | comp_unit_die->attrs[i++] = *low_pc; | |
6648 | if (high_pc != NULL) | |
6649 | comp_unit_die->attrs[i++] = *high_pc; | |
6650 | if (ranges != NULL) | |
6651 | comp_unit_die->attrs[i++] = *ranges; | |
6652 | if (comp_dir != NULL) | |
6653 | comp_unit_die->attrs[i++] = *comp_dir; | |
6654 | comp_unit_die->num_attrs += num_extra_attrs; | |
6655 | ||
b4f54984 | 6656 | if (dwarf_die_debug) |
bf6af496 DE |
6657 | { |
6658 | fprintf_unfiltered (gdb_stdlog, | |
6659 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6660 | section->get_name (), |
bf6af496 DE |
6661 | (unsigned) (begin_info_ptr - section->buffer), |
6662 | bfd_get_filename (abfd)); | |
b4f54984 | 6663 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6664 | } |
6665 | ||
b0c7bfa9 DE |
6666 | /* Skip dummy compilation units. */ |
6667 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6668 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6669 | return 0; | |
6670 | ||
6671 | *result_info_ptr = info_ptr; | |
6672 | return 1; | |
6673 | } | |
6674 | ||
a084a2a6 AT |
6675 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6676 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6677 | signature is part of the header. */ | |
6678 | static gdb::optional<ULONGEST> | |
6679 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6680 | { | |
6681 | if (cu->header.version >= 5) | |
6682 | return cu->header.signature; | |
6683 | struct attribute *attr; | |
6684 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6685 | if (attr == nullptr) | |
6686 | return gdb::optional<ULONGEST> (); | |
6687 | return DW_UNSND (attr); | |
6688 | } | |
6689 | ||
c0ab21c2 | 6690 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6691 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6692 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6693 | |
6694 | static struct dwo_unit * | |
6695 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
c0ab21c2 TT |
6696 | struct die_info *comp_unit_die, |
6697 | const char *dwo_name) | |
b0c7bfa9 DE |
6698 | { |
6699 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6700 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6701 | const char *comp_dir; |
b0c7bfa9 | 6702 | |
a2ce51a0 DE |
6703 | gdb_assert (cu != NULL); |
6704 | ||
b0c7bfa9 | 6705 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6706 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6707 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
6708 | |
6709 | if (this_cu->is_debug_types) | |
6710 | { | |
6711 | struct signatured_type *sig_type; | |
6712 | ||
6713 | /* Since this_cu is the first member of struct signatured_type, | |
6714 | we can go from a pointer to one to a pointer to the other. */ | |
6715 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
6716 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
6717 | } | |
6718 | else | |
6719 | { | |
a084a2a6 AT |
6720 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
6721 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
6722 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6723 | " [in module %s]"), | |
e3b94546 | 6724 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 6725 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 6726 | *signature); |
b0c7bfa9 DE |
6727 | } |
6728 | ||
b0c7bfa9 DE |
6729 | return dwo_unit; |
6730 | } | |
6731 | ||
c0ab21c2 | 6732 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6733 | See it for a description of the parameters. |
fcd3b13d | 6734 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6735 | |
c0ab21c2 TT |
6736 | void |
6737 | cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 6738 | int use_existing_cu) |
a2ce51a0 | 6739 | { |
a2ce51a0 | 6740 | struct signatured_type *sig_type; |
a2ce51a0 | 6741 | struct die_reader_specs reader; |
a2ce51a0 DE |
6742 | |
6743 | /* Verify we can do the following downcast, and that we have the | |
6744 | data we need. */ | |
6745 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6746 | sig_type = (struct signatured_type *) this_cu; | |
6747 | gdb_assert (sig_type->dwo_unit != NULL); | |
6748 | ||
6aa5f3a6 DE |
6749 | if (use_existing_cu && this_cu->cu != NULL) |
6750 | { | |
6751 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6752 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6753 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6754 | } |
6755 | else | |
6756 | { | |
6757 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6758 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 | 6759 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
6760 | } |
6761 | ||
6762 | /* A future optimization, if needed, would be to use an existing | |
6763 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6764 | could share abbrev tables. */ | |
a2ce51a0 DE |
6765 | |
6766 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
a2ce51a0 DE |
6767 | NULL /* stub_comp_unit_die */, |
6768 | sig_type->dwo_unit->dwo_file->comp_dir, | |
6769 | &reader, &info_ptr, | |
3e225074 | 6770 | &comp_unit_die, |
c0ab21c2 | 6771 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6772 | { |
6773 | /* Dummy die. */ | |
c0ab21c2 | 6774 | dummy_p = true; |
a2ce51a0 | 6775 | } |
a2ce51a0 DE |
6776 | } |
6777 | ||
fd820528 | 6778 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6779 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6780 | |
f4dc4d17 DE |
6781 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6782 | Otherwise the table specified in the comp unit header is read in and used. | |
6783 | This is an optimization for when we already have the abbrev table. | |
6784 | ||
dee91e82 | 6785 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6751ebae | 6786 | Otherwise, a new CU is allocated with xmalloc. */ |
aaa75496 | 6787 | |
c0ab21c2 TT |
6788 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
6789 | struct abbrev_table *abbrev_table, | |
6751ebae | 6790 | int use_existing_cu, |
c0ab21c2 TT |
6791 | bool skip_partial) |
6792 | : die_reader_specs {}, | |
6751ebae | 6793 | m_this_cu (this_cu) |
c906108c | 6794 | { |
ed2dc618 | 6795 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 6796 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6797 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6798 | bfd *abfd = section->get_bfd_owner (); |
dee91e82 | 6799 | struct dwarf2_cu *cu; |
c0ab21c2 | 6800 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6801 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6802 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6803 | /* Non-zero if CU currently points to a DWO file and we need to |
6804 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6805 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6806 | int rereading_dwo_cu = 0; |
c906108c | 6807 | |
b4f54984 | 6808 | if (dwarf_die_debug) |
9d8780f0 | 6809 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6810 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6811 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6812 | |
a2ce51a0 DE |
6813 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6814 | file (instead of going through the stub), short-circuit all of this. */ | |
6815 | if (this_cu->reading_dwo_directly) | |
6816 | { | |
6817 | /* Narrow down the scope of possibilities to have to understand. */ | |
6818 | gdb_assert (this_cu->is_debug_types); | |
6819 | gdb_assert (abbrev_table == NULL); | |
6751ebae | 6820 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu); |
a2ce51a0 DE |
6821 | return; |
6822 | } | |
6823 | ||
dee91e82 | 6824 | /* This is cheap if the section is already read in. */ |
96b79293 | 6825 | section->read (objfile); |
dee91e82 | 6826 | |
9c541725 | 6827 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6828 | |
6829 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6830 | |
6831 | if (use_existing_cu && this_cu->cu != NULL) | |
6832 | { | |
6833 | cu = this_cu->cu; | |
42e7ad6c DE |
6834 | /* If this CU is from a DWO file we need to start over, we need to |
6835 | refetch the attributes from the skeleton CU. | |
6836 | This could be optimized by retrieving those attributes from when we | |
6837 | were here the first time: the previous comp_unit_die was stored in | |
6838 | comp_unit_obstack. But there's no data yet that we need this | |
6839 | optimization. */ | |
6840 | if (cu->dwo_unit != NULL) | |
6841 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6842 | } |
6843 | else | |
6844 | { | |
6845 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6846 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 TT |
6847 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6848 | cu = m_new_cu.get (); | |
42e7ad6c | 6849 | } |
dee91e82 | 6850 | |
b0c7bfa9 | 6851 | /* Get the header. */ |
9c541725 | 6852 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6853 | { |
6854 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6855 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6856 | } |
6857 | else | |
6858 | { | |
3019eac3 | 6859 | if (this_cu->is_debug_types) |
dee91e82 | 6860 | { |
ed2dc618 SM |
6861 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6862 | &cu->header, section, | |
4bdcc0c1 | 6863 | abbrev_section, info_ptr, |
43988095 | 6864 | rcuh_kind::TYPE); |
dee91e82 | 6865 | |
42e7ad6c DE |
6866 | /* Since per_cu is the first member of struct signatured_type, |
6867 | we can go from a pointer to one to a pointer to the other. */ | |
6868 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6869 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6870 | gdb_assert (sig_type->type_offset_in_tu |
6871 | == cu->header.type_cu_offset_in_tu); | |
6872 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6873 | |
42e7ad6c DE |
6874 | /* LENGTH has not been set yet for type units if we're |
6875 | using .gdb_index. */ | |
4057dfde | 6876 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6877 | |
6878 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6879 | sig_type->type_offset_in_section = |
6880 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6881 | |
6882 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6883 | } |
6884 | else | |
6885 | { | |
ed2dc618 SM |
6886 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6887 | &cu->header, section, | |
4bdcc0c1 | 6888 | abbrev_section, |
43988095 JK |
6889 | info_ptr, |
6890 | rcuh_kind::COMPILE); | |
dee91e82 | 6891 | |
9c541725 | 6892 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
4057dfde | 6893 | gdb_assert (this_cu->length == cu->header.get_length ()); |
43988095 | 6894 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6895 | } |
6896 | } | |
10b3939b | 6897 | |
6caca83c | 6898 | /* Skip dummy compilation units. */ |
dee91e82 | 6899 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6900 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6901 | { |
6902 | dummy_p = true; | |
6903 | return; | |
6904 | } | |
6caca83c | 6905 | |
433df2d4 DE |
6906 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6907 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6908 | done. */ |
f4dc4d17 | 6909 | if (abbrev_table != NULL) |
685af9cd TT |
6910 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6911 | else | |
f4dc4d17 | 6912 | { |
c0ab21c2 | 6913 | m_abbrev_table_holder |
86de1d91 TT |
6914 | = abbrev_table::read (objfile, abbrev_section, |
6915 | cu->header.abbrev_sect_off); | |
c0ab21c2 | 6916 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6917 | } |
af703f96 | 6918 | |
dee91e82 | 6919 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6920 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 6921 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 6922 | |
58f0c718 | 6923 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
6924 | { |
6925 | dummy_p = true; | |
6926 | return; | |
6927 | } | |
58f0c718 | 6928 | |
b0c7bfa9 | 6929 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
6930 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
6931 | table from the DWO file and pass the ownership over to us. It will be | |
6932 | referenced from READER, so we must make sure to free it after we're done | |
6933 | with READER. | |
6934 | ||
b0c7bfa9 DE |
6935 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
6936 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 6937 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 6938 | if (dwo_name != nullptr) |
3019eac3 | 6939 | { |
3019eac3 | 6940 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6941 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 6942 | |
3e225074 | 6943 | if (comp_unit_die->has_children) |
6a506a2d | 6944 | { |
b98664d3 | 6945 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
6946 | " has children (offset %s) [in module %s]"), |
6947 | sect_offset_str (this_cu->sect_off), | |
6948 | bfd_get_filename (abfd)); | |
6a506a2d | 6949 | } |
c0ab21c2 | 6950 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die, dwo_name); |
6a506a2d | 6951 | if (dwo_unit != NULL) |
3019eac3 | 6952 | { |
6a506a2d | 6953 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 6954 | comp_unit_die, NULL, |
c0ab21c2 | 6955 | this, &info_ptr, |
3e225074 | 6956 | &dwo_comp_unit_die, |
c0ab21c2 | 6957 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
6958 | { |
6959 | /* Dummy die. */ | |
c0ab21c2 | 6960 | dummy_p = true; |
6a506a2d DE |
6961 | return; |
6962 | } | |
6963 | comp_unit_die = dwo_comp_unit_die; | |
6964 | } | |
6965 | else | |
6966 | { | |
6967 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6968 | the stub. A complaint has already been logged. There's | |
6969 | not much more we can do except pass on the stub DIE to | |
6970 | die_reader_func. We don't want to throw an error on bad | |
6971 | debug info. */ | |
3019eac3 DE |
6972 | } |
6973 | } | |
c0ab21c2 | 6974 | } |
3019eac3 | 6975 | |
6751ebae TT |
6976 | void |
6977 | cutu_reader::keep () | |
c0ab21c2 | 6978 | { |
b0c7bfa9 | 6979 | /* Done, clean up. */ |
6751ebae TT |
6980 | gdb_assert (!dummy_p); |
6981 | if (m_new_cu != NULL) | |
348e048f | 6982 | { |
c0ab21c2 TT |
6983 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6984 | = m_this_cu->dwarf2_per_objfile; | |
fcd3b13d | 6985 | /* Link this CU into read_in_chain. */ |
c0ab21c2 TT |
6986 | m_this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
6987 | dwarf2_per_objfile->read_in_chain = m_this_cu; | |
fcd3b13d | 6988 | /* The chain owns it now. */ |
c0ab21c2 | 6989 | m_new_cu.release (); |
348e048f | 6990 | } |
dee91e82 DE |
6991 | } |
6992 | ||
18a8505e AT |
6993 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
6994 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
6995 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6996 | |
6997 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6998 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6999 | |
7000 | We fill in THIS_CU->length. | |
7001 | ||
dee91e82 | 7002 | THIS_CU->cu is always freed when done. |
3019eac3 | 7003 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
7004 | to care whether it refers to the "main" CU or the DWO CU. |
7005 | ||
7006 | When parent_cu is passed, it is used to provide a default value for | |
7007 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 7008 | |
c0ab21c2 TT |
7009 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
7010 | struct dwarf2_cu *parent_cu, | |
7011 | struct dwo_file *dwo_file) | |
7012 | : die_reader_specs {}, | |
7013 | m_this_cu (this_cu) | |
dee91e82 | 7014 | { |
ed2dc618 | 7015 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7016 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7017 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 7018 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 7019 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7020 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7021 | |
b4f54984 | 7022 | if (dwarf_die_debug) |
9d8780f0 | 7023 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7024 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7025 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7026 | |
dee91e82 DE |
7027 | gdb_assert (this_cu->cu == NULL); |
7028 | ||
33e80786 DE |
7029 | abbrev_section = (dwo_file != NULL |
7030 | ? &dwo_file->sections.abbrev | |
7031 | : get_abbrev_section_for_cu (this_cu)); | |
7032 | ||
dee91e82 | 7033 | /* This is cheap if the section is already read in. */ |
96b79293 | 7034 | section->read (objfile); |
dee91e82 | 7035 | |
c0ab21c2 | 7036 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
dee91e82 | 7037 | |
9c541725 | 7038 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 | 7039 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
c0ab21c2 | 7040 | &m_new_cu->header, section, |
4bdcc0c1 | 7041 | abbrev_section, info_ptr, |
43988095 JK |
7042 | (this_cu->is_debug_types |
7043 | ? rcuh_kind::TYPE | |
7044 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7045 | |
18a8505e AT |
7046 | if (parent_cu != nullptr) |
7047 | { | |
c0ab21c2 TT |
7048 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
7049 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 7050 | } |
4057dfde | 7051 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
7052 | |
7053 | /* Skip dummy compilation units. */ | |
7054 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7055 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
7056 | { |
7057 | dummy_p = true; | |
7058 | return; | |
7059 | } | |
72bf9492 | 7060 | |
c0ab21c2 | 7061 | m_abbrev_table_holder |
86de1d91 TT |
7062 | = abbrev_table::read (objfile, abbrev_section, |
7063 | m_new_cu->header.abbrev_sect_off); | |
dee91e82 | 7064 | |
c0ab21c2 TT |
7065 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
7066 | m_abbrev_table_holder.get ()); | |
3e225074 | 7067 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
7068 | } |
7069 | ||
0018ea6f DE |
7070 | \f |
7071 | /* Type Unit Groups. | |
dee91e82 | 7072 | |
0018ea6f DE |
7073 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7074 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7075 | so that all types coming from the same compilation (.o file) are grouped | |
7076 | together. A future step could be to put the types in the same symtab as | |
7077 | the CU the types ultimately came from. */ | |
ff013f42 | 7078 | |
f4dc4d17 DE |
7079 | static hashval_t |
7080 | hash_type_unit_group (const void *item) | |
7081 | { | |
9a3c8263 SM |
7082 | const struct type_unit_group *tu_group |
7083 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7084 | |
094b34ac | 7085 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7086 | } |
348e048f DE |
7087 | |
7088 | static int | |
f4dc4d17 | 7089 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7090 | { |
9a3c8263 SM |
7091 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7092 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7093 | |
094b34ac | 7094 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7095 | } |
348e048f | 7096 | |
f4dc4d17 DE |
7097 | /* Allocate a hash table for type unit groups. */ |
7098 | ||
eaa5fa8b | 7099 | static htab_up |
298e9637 | 7100 | allocate_type_unit_groups_table () |
f4dc4d17 | 7101 | { |
eaa5fa8b TT |
7102 | return htab_up (htab_create_alloc (3, |
7103 | hash_type_unit_group, | |
7104 | eq_type_unit_group, | |
7105 | NULL, xcalloc, xfree)); | |
f4dc4d17 | 7106 | } |
dee91e82 | 7107 | |
f4dc4d17 DE |
7108 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7109 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7110 | of any one psymtab grow too big. */ | |
7111 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7112 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7113 | |
094b34ac | 7114 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7115 | Create the type_unit_group object used to hold one or more TUs. */ |
7116 | ||
7117 | static struct type_unit_group * | |
094b34ac | 7118 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7119 | { |
518817b3 SM |
7120 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7121 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7122 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7123 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7124 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7125 | |
7126 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7127 | struct type_unit_group); | |
094b34ac | 7128 | per_cu = &tu_group->per_cu; |
518817b3 | 7129 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7130 | |
094b34ac DE |
7131 | if (dwarf2_per_objfile->using_index) |
7132 | { | |
7133 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7134 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7135 | } |
7136 | else | |
7137 | { | |
9c541725 | 7138 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 7139 | dwarf2_psymtab *pst; |
528e1572 | 7140 | std::string name; |
094b34ac DE |
7141 | |
7142 | /* Give the symtab a useful name for debug purposes. */ | |
7143 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7144 | name = string_printf ("<type_units_%d>", |
7145 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7146 | else |
528e1572 | 7147 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7148 | |
528e1572 | 7149 | pst = create_partial_symtab (per_cu, name.c_str ()); |
6d94535f | 7150 | pst->anonymous = true; |
094b34ac | 7151 | } |
f4dc4d17 | 7152 | |
094b34ac | 7153 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7154 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7155 | |
7156 | return tu_group; | |
7157 | } | |
7158 | ||
094b34ac DE |
7159 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7160 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7161 | |
7162 | static struct type_unit_group * | |
ff39bb5e | 7163 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7164 | { |
518817b3 SM |
7165 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7166 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7167 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7168 | struct type_unit_group *tu_group; | |
7169 | void **slot; | |
7170 | unsigned int line_offset; | |
7171 | struct type_unit_group type_unit_group_for_lookup; | |
7172 | ||
7173 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
298e9637 | 7174 | dwarf2_per_objfile->type_unit_groups = allocate_type_unit_groups_table (); |
f4dc4d17 DE |
7175 | |
7176 | /* Do we need to create a new group, or can we use an existing one? */ | |
7177 | ||
7178 | if (stmt_list) | |
7179 | { | |
7180 | line_offset = DW_UNSND (stmt_list); | |
7181 | ++tu_stats->nr_symtab_sharers; | |
7182 | } | |
7183 | else | |
7184 | { | |
7185 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7186 | We can do various things here like create one group per TU or | |
7187 | spread them over multiple groups to split up the expansion work. | |
7188 | To avoid worst case scenarios (too many groups or too large groups) | |
7189 | we, umm, group them in bunches. */ | |
7190 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7191 | | (tu_stats->nr_stmt_less_type_units | |
7192 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7193 | ++tu_stats->nr_stmt_less_type_units; | |
7194 | } | |
7195 | ||
094b34ac | 7196 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7197 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
eaa5fa8b | 7198 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups.get (), |
f4dc4d17 DE |
7199 | &type_unit_group_for_lookup, INSERT); |
7200 | if (*slot != NULL) | |
7201 | { | |
9a3c8263 | 7202 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7203 | gdb_assert (tu_group != NULL); |
7204 | } | |
7205 | else | |
7206 | { | |
9c541725 | 7207 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7208 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7209 | *slot = tu_group; |
7210 | ++tu_stats->nr_symtabs; | |
7211 | } | |
7212 | ||
7213 | return tu_group; | |
7214 | } | |
0018ea6f DE |
7215 | \f |
7216 | /* Partial symbol tables. */ | |
7217 | ||
7218 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7219 | ||
7220 | The caller must fill in the following details: | |
7221 | dirname, textlow, texthigh. */ | |
7222 | ||
891813be | 7223 | static dwarf2_psymtab * |
0018ea6f DE |
7224 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
7225 | { | |
e3b94546 | 7226 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
891813be | 7227 | dwarf2_psymtab *pst; |
0018ea6f | 7228 | |
891813be | 7229 | pst = new dwarf2_psymtab (name, objfile, 0); |
0018ea6f | 7230 | |
6d94535f | 7231 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
7232 | |
7233 | /* This is the glue that links PST into GDB's symbol API. */ | |
891813be | 7234 | pst->per_cu_data = per_cu; |
0018ea6f DE |
7235 | per_cu->v.psymtab = pst; |
7236 | ||
7237 | return pst; | |
7238 | } | |
7239 | ||
c0ab21c2 | 7240 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
7241 | |
7242 | static void | |
7243 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7244 | const gdb_byte *info_ptr, |
0018ea6f | 7245 | struct die_info *comp_unit_die, |
c0ab21c2 | 7246 | enum language pretend_language) |
0018ea6f DE |
7247 | { |
7248 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7249 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 7250 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7251 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7252 | CORE_ADDR baseaddr; |
7253 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 7254 | dwarf2_psymtab *pst; |
3a2b436a | 7255 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7256 | const char *filename; |
0018ea6f | 7257 | |
0018ea6f DE |
7258 | gdb_assert (! per_cu->is_debug_types); |
7259 | ||
c0ab21c2 | 7260 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 7261 | |
0018ea6f | 7262 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
7263 | gdb::unique_xmalloc_ptr<char> debug_filename; |
7264 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
7265 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7266 | if (filename == NULL) | |
0018ea6f | 7267 | filename = ""; |
2e927613 TV |
7268 | else if (strcmp (filename, artificial) == 0) |
7269 | { | |
7270 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
7271 | sect_offset_str (per_cu->sect_off), |
7272 | (char *) NULL)); | |
2e927613 TV |
7273 | filename = debug_filename.get (); |
7274 | } | |
0018ea6f DE |
7275 | |
7276 | pst = create_partial_symtab (per_cu, filename); | |
7277 | ||
7278 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7279 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 7280 | |
b3b3bada | 7281 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
7282 | |
7283 | dwarf2_find_base_address (comp_unit_die, cu); | |
7284 | ||
7285 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7286 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7287 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7288 | &best_highpc, cu, pst); | |
7289 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
7290 | { |
7291 | CORE_ADDR low | |
7292 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
7293 | - baseaddr); | |
7294 | CORE_ADDR high | |
7295 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
7296 | - baseaddr - 1); | |
7297 | /* Store the contiguous range if it is not empty; it can be | |
7298 | empty for CUs with no code. */ | |
d320c2b5 TT |
7299 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
7300 | low, high, pst); | |
79748972 | 7301 | } |
0018ea6f DE |
7302 | |
7303 | /* Check if comp unit has_children. | |
7304 | If so, read the rest of the partial symbols from this comp unit. | |
7305 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7306 | if (comp_unit_die->has_children) |
0018ea6f DE |
7307 | { |
7308 | struct partial_die_info *first_die; | |
7309 | CORE_ADDR lowpc, highpc; | |
7310 | ||
7311 | lowpc = ((CORE_ADDR) -1); | |
7312 | highpc = ((CORE_ADDR) 0); | |
7313 | ||
7314 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7315 | ||
7316 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7317 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7318 | |
7319 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7320 | complaints from `maint check'. */ | |
7321 | if (lowpc == ((CORE_ADDR) -1)) | |
7322 | lowpc = highpc; | |
7323 | ||
7324 | /* If the compilation unit didn't have an explicit address range, | |
7325 | then use the information extracted from its child dies. */ | |
e385593e | 7326 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7327 | { |
7328 | best_lowpc = lowpc; | |
7329 | best_highpc = highpc; | |
7330 | } | |
7331 | } | |
4ae976d1 | 7332 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7333 | best_lowpc + baseaddr) |
7334 | - baseaddr); | |
4ae976d1 | 7335 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7336 | best_highpc + baseaddr) |
7337 | - baseaddr); | |
0018ea6f | 7338 | |
8763cede | 7339 | end_psymtab_common (objfile, pst); |
0018ea6f | 7340 | |
ae640021 | 7341 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
7342 | { |
7343 | int i; | |
ae640021 | 7344 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
7345 | |
7346 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7347 | post-pass. */ | |
7348 | pst->number_of_dependencies = len; | |
a9342b62 TT |
7349 | pst->dependencies |
7350 | = objfile->partial_symtabs->allocate_dependencies (len); | |
ae640021 AB |
7351 | for (i = 0; i < len; ++i) |
7352 | { | |
7353 | pst->dependencies[i] | |
7354 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
7355 | } | |
0018ea6f | 7356 | |
ae640021 | 7357 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
7358 | } |
7359 | ||
7360 | /* Get the list of files included in the current compilation unit, | |
7361 | and build a psymtab for each of them. */ | |
7362 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7363 | ||
b4f54984 | 7364 | if (dwarf_read_debug) |
b926417a TT |
7365 | fprintf_unfiltered (gdb_stdlog, |
7366 | "Psymtab for %s unit @%s: %s - %s" | |
7367 | ", %d global, %d static syms\n", | |
7368 | per_cu->is_debug_types ? "type" : "comp", | |
7369 | sect_offset_str (per_cu->sect_off), | |
7370 | paddress (gdbarch, pst->text_low (objfile)), | |
7371 | paddress (gdbarch, pst->text_high (objfile)), | |
7372 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
7373 | } |
7374 | ||
7375 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7376 | Process compilation unit THIS_CU for a psymtab. */ | |
7377 | ||
7378 | static void | |
7379 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
135f5437 | 7380 | bool want_partial_unit, |
b93601f3 | 7381 | enum language pretend_language) |
0018ea6f DE |
7382 | { |
7383 | /* If this compilation unit was already read in, free the | |
7384 | cached copy in order to read it in again. This is | |
7385 | necessary because we skipped some symbols when we first | |
7386 | read in the compilation unit (see load_partial_dies). | |
7387 | This problem could be avoided, but the benefit is unclear. */ | |
7388 | if (this_cu->cu != NULL) | |
7389 | free_one_cached_comp_unit (this_cu); | |
7390 | ||
6751ebae | 7391 | cutu_reader reader (this_cu, NULL, 0, false); |
c0ab21c2 TT |
7392 | |
7393 | if (reader.dummy_p) | |
f1902523 | 7394 | { |
c0ab21c2 | 7395 | /* Nothing. */ |
f1902523 | 7396 | } |
c0ab21c2 | 7397 | else if (this_cu->is_debug_types) |
3e225074 TT |
7398 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7399 | reader.comp_unit_die); | |
135f5437 TT |
7400 | else if (want_partial_unit |
7401 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7402 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7403 | reader.comp_unit_die, | |
c0ab21c2 | 7404 | pretend_language); |
0018ea6f DE |
7405 | |
7406 | /* Age out any secondary CUs. */ | |
ed2dc618 | 7407 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 7408 | } |
f4dc4d17 DE |
7409 | |
7410 | /* Reader function for build_type_psymtabs. */ | |
7411 | ||
7412 | static void | |
7413 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7414 | const gdb_byte *info_ptr, |
3e225074 | 7415 | struct die_info *type_unit_die) |
f4dc4d17 | 7416 | { |
ed2dc618 | 7417 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 7418 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
7419 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7420 | struct dwarf2_cu *cu = reader->cu; | |
7421 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7422 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7423 | struct type_unit_group *tu_group; |
7424 | struct attribute *attr; | |
7425 | struct partial_die_info *first_die; | |
7426 | CORE_ADDR lowpc, highpc; | |
891813be | 7427 | dwarf2_psymtab *pst; |
f4dc4d17 | 7428 | |
0186c6a7 DE |
7429 | gdb_assert (per_cu->is_debug_types); |
7430 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7431 | |
3e225074 | 7432 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7433 | return; |
7434 | ||
7435 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7436 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7437 | |
df07e2c7 | 7438 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7439 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7440 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7441 | |
7442 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 | 7443 | pst = create_partial_symtab (per_cu, ""); |
6d94535f | 7444 | pst->anonymous = true; |
f4dc4d17 DE |
7445 | |
7446 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7447 | ||
7448 | lowpc = (CORE_ADDR) -1; | |
7449 | highpc = (CORE_ADDR) 0; | |
7450 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7451 | ||
8763cede | 7452 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7453 | } |
7454 | ||
73051182 DE |
7455 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7456 | ||
7457 | struct tu_abbrev_offset | |
7458 | { | |
b2bdb8cf SM |
7459 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7460 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7461 | {} | |
7462 | ||
7463 | signatured_type *sig_type; | |
73051182 DE |
7464 | sect_offset abbrev_offset; |
7465 | }; | |
7466 | ||
484cf504 | 7467 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 7468 | |
484cf504 TT |
7469 | static bool |
7470 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
7471 | const struct tu_abbrev_offset &b) | |
73051182 | 7472 | { |
484cf504 | 7473 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
7474 | } |
7475 | ||
7476 | /* Efficiently read all the type units. | |
7477 | This does the bulk of the work for build_type_psymtabs. | |
7478 | ||
7479 | The efficiency is because we sort TUs by the abbrev table they use and | |
7480 | only read each abbrev table once. In one program there are 200K TUs | |
7481 | sharing 8K abbrev tables. | |
7482 | ||
7483 | The main purpose of this function is to support building the | |
7484 | dwarf2_per_objfile->type_unit_groups table. | |
7485 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7486 | can collapse the search space by grouping them by stmt_list. | |
7487 | The savings can be significant, in the same program from above the 200K TUs | |
7488 | share 8K stmt_list tables. | |
7489 | ||
7490 | FUNC is expected to call get_type_unit_group, which will create the | |
7491 | struct type_unit_group if necessary and add it to | |
7492 | dwarf2_per_objfile->type_unit_groups. */ | |
7493 | ||
7494 | static void | |
ed2dc618 | 7495 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 7496 | { |
73051182 | 7497 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 7498 | abbrev_table_up abbrev_table; |
73051182 | 7499 | sect_offset abbrev_offset; |
73051182 DE |
7500 | |
7501 | /* It's up to the caller to not call us multiple times. */ | |
7502 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7503 | ||
b2bdb8cf | 7504 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
7505 | return; |
7506 | ||
7507 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7508 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7509 | read each abbrev table in. | |
7510 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7511 | This is simpler and efficient enough for now. | |
7512 | ||
7513 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7514 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7515 | stmt_list value too so in practice this should work well. | |
7516 | ||
7517 | The basic algorithm here is: | |
7518 | ||
7519 | sort TUs by abbrev table | |
7520 | for each TU with same abbrev table: | |
7521 | read abbrev table if first user | |
7522 | read TU top level DIE | |
7523 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7524 | call FUNC */ | |
7525 | ||
b4f54984 | 7526 | if (dwarf_read_debug) |
73051182 DE |
7527 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7528 | ||
7529 | /* Sort in a separate table to maintain the order of all_type_units | |
7530 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
7531 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
7532 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
7533 | ||
7534 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
7535 | sorted_by_abbrev.emplace_back | |
7536 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
7537 | sig_type->per_cu.section, | |
7538 | sig_type->per_cu.sect_off)); | |
73051182 | 7539 | |
484cf504 TT |
7540 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
7541 | sort_tu_by_abbrev_offset); | |
73051182 | 7542 | |
9c541725 | 7543 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7544 | |
b2bdb8cf | 7545 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7546 | { |
73051182 DE |
7547 | /* Switch to the next abbrev table if necessary. */ |
7548 | if (abbrev_table == NULL | |
b2bdb8cf | 7549 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7550 | { |
b2bdb8cf | 7551 | abbrev_offset = tu.abbrev_offset; |
73051182 | 7552 | abbrev_table = |
86de1d91 TT |
7553 | abbrev_table::read (dwarf2_per_objfile->objfile, |
7554 | &dwarf2_per_objfile->abbrev, | |
7555 | abbrev_offset); | |
73051182 DE |
7556 | ++tu_stats->nr_uniq_abbrev_tables; |
7557 | } | |
7558 | ||
c0ab21c2 | 7559 | cutu_reader reader (&tu.sig_type->per_cu, abbrev_table.get (), |
6751ebae | 7560 | 0, false); |
c0ab21c2 TT |
7561 | if (!reader.dummy_p) |
7562 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7563 | reader.comp_unit_die); |
73051182 | 7564 | } |
6aa5f3a6 | 7565 | } |
73051182 | 7566 | |
6aa5f3a6 DE |
7567 | /* Print collected type unit statistics. */ |
7568 | ||
7569 | static void | |
ed2dc618 | 7570 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7571 | { |
7572 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7573 | ||
7574 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
7575 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
7576 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
7577 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
7578 | tu_stats->nr_uniq_abbrev_tables); | |
7579 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7580 | tu_stats->nr_symtabs); | |
7581 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7582 | tu_stats->nr_symtab_sharers); | |
7583 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7584 | tu_stats->nr_stmt_less_type_units); | |
7585 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7586 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7587 | } |
7588 | ||
f4dc4d17 DE |
7589 | /* Traversal function for build_type_psymtabs. */ |
7590 | ||
7591 | static int | |
7592 | build_type_psymtab_dependencies (void **slot, void *info) | |
7593 | { | |
ed2dc618 SM |
7594 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7595 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
7596 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7597 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7598 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
891813be | 7599 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
df07e2c7 | 7600 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7601 | int i; |
7602 | ||
7603 | gdb_assert (len > 0); | |
197400e8 | 7604 | gdb_assert (per_cu->type_unit_group_p ()); |
f4dc4d17 DE |
7605 | |
7606 | pst->number_of_dependencies = len; | |
a9342b62 | 7607 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7608 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7609 | { |
df07e2c7 | 7610 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
7611 | gdb_assert (iter->per_cu.is_debug_types); |
7612 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7613 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7614 | } |
7615 | ||
df07e2c7 AB |
7616 | delete tu_group->tus; |
7617 | tu_group->tus = nullptr; | |
348e048f DE |
7618 | |
7619 | return 1; | |
7620 | } | |
7621 | ||
7622 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7623 | Build partial symbol tables for the .debug_types comp-units. */ | |
7624 | ||
7625 | static void | |
ed2dc618 | 7626 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 7627 | { |
ed2dc618 | 7628 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
7629 | return; |
7630 | ||
ed2dc618 | 7631 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 7632 | } |
f4dc4d17 | 7633 | |
6aa5f3a6 DE |
7634 | /* Traversal function for process_skeletonless_type_unit. |
7635 | Read a TU in a DWO file and build partial symbols for it. */ | |
7636 | ||
7637 | static int | |
7638 | process_skeletonless_type_unit (void **slot, void *info) | |
7639 | { | |
7640 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
7641 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7642 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
7643 | struct signatured_type find_entry, *entry; |
7644 | ||
7645 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7646 | ||
7647 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 7648 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
6aa5f3a6 DE |
7649 | |
7650 | find_entry.signature = dwo_unit->signature; | |
b0b6a987 TT |
7651 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
7652 | &find_entry, INSERT); | |
6aa5f3a6 DE |
7653 | /* If we've already seen this type there's nothing to do. What's happening |
7654 | is we're doing our own version of comdat-folding here. */ | |
7655 | if (*slot != NULL) | |
7656 | return 1; | |
7657 | ||
7658 | /* This does the job that create_all_type_units would have done for | |
7659 | this TU. */ | |
ed2dc618 SM |
7660 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
7661 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7662 | *slot = entry; |
7663 | ||
7664 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6751ebae | 7665 | cutu_reader reader (&entry->per_cu, NULL, 0, false); |
c0ab21c2 TT |
7666 | if (!reader.dummy_p) |
7667 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7668 | reader.comp_unit_die); |
6aa5f3a6 DE |
7669 | |
7670 | return 1; | |
7671 | } | |
7672 | ||
7673 | /* Traversal function for process_skeletonless_type_units. */ | |
7674 | ||
7675 | static int | |
7676 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7677 | { | |
7678 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7679 | ||
7680 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7681 | htab_traverse_noresize (dwo_file->tus.get (), |
7682 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7683 | |
7684 | return 1; | |
7685 | } | |
7686 | ||
7687 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7688 | This is needed in case a TU was emitted without its skeleton. | |
7689 | Note: This can't be done until we know what all the DWO files are. */ | |
7690 | ||
7691 | static void | |
ed2dc618 | 7692 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7693 | { |
7694 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 7695 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
7696 | && dwarf2_per_objfile->dwo_files != NULL) |
7697 | { | |
51ac9db5 | 7698 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 7699 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 7700 | dwarf2_per_objfile); |
6aa5f3a6 | 7701 | } |
348e048f DE |
7702 | } |
7703 | ||
ed2dc618 | 7704 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7705 | |
7706 | static void | |
ed2dc618 | 7707 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 7708 | { |
b76e467d | 7709 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 7710 | { |
891813be | 7711 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7712 | |
36586728 TT |
7713 | if (pst == NULL) |
7714 | continue; | |
7715 | ||
b76e467d | 7716 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7717 | { |
7718 | /* Set the 'user' field only if it is not already set. */ | |
7719 | if (pst->dependencies[j]->user == NULL) | |
7720 | pst->dependencies[j]->user = pst; | |
7721 | } | |
7722 | } | |
7723 | } | |
7724 | ||
93311388 DE |
7725 | /* Build the partial symbol table by doing a quick pass through the |
7726 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7727 | |
93311388 | 7728 | static void |
ed2dc618 | 7729 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 7730 | { |
ed2dc618 | 7731 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 7732 | |
b4f54984 | 7733 | if (dwarf_read_debug) |
45cfd468 DE |
7734 | { |
7735 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7736 | objfile_name (objfile)); |
45cfd468 DE |
7737 | } |
7738 | ||
76935768 TT |
7739 | scoped_restore restore_reading_psyms |
7740 | = make_scoped_restore (&dwarf2_per_objfile->reading_partial_symbols, | |
7741 | true); | |
98bfdba5 | 7742 | |
96b79293 | 7743 | dwarf2_per_objfile->info.read (objfile); |
91c24f0a | 7744 | |
93311388 DE |
7745 | /* Any cached compilation units will be linked by the per-objfile |
7746 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 7747 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 7748 | |
ed2dc618 | 7749 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 7750 | |
ed2dc618 | 7751 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 7752 | |
60606b2c TT |
7753 | /* Create a temporary address map on a temporary obstack. We later |
7754 | copy this to the final obstack. */ | |
8268c778 | 7755 | auto_obstack temp_obstack; |
791afaa2 TT |
7756 | |
7757 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 7758 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7759 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7760 | |
b76e467d | 7761 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
135f5437 | 7762 | process_psymtab_comp_unit (per_cu, false, language_minimal); |
ff013f42 | 7763 | |
6aa5f3a6 | 7764 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 7765 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
7766 | |
7767 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7768 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7769 | { | |
eaa5fa8b | 7770 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups.get (), |
ed2dc618 | 7771 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
7772 | } |
7773 | ||
b4f54984 | 7774 | if (dwarf_read_debug) |
ed2dc618 | 7775 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 7776 | |
ed2dc618 | 7777 | set_partial_user (dwarf2_per_objfile); |
95554aad | 7778 | |
d320c2b5 TT |
7779 | objfile->partial_symtabs->psymtabs_addrmap |
7780 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 7781 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
7782 | /* At this point we want to keep the address map. */ |
7783 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7784 | |
b4f54984 | 7785 | if (dwarf_read_debug) |
45cfd468 | 7786 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7787 | objfile_name (objfile)); |
ae038cb0 DJ |
7788 | } |
7789 | ||
dee91e82 DE |
7790 | /* Load the partial DIEs for a secondary CU into memory. |
7791 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7792 | |
dee91e82 DE |
7793 | static void |
7794 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7795 | { | |
6751ebae | 7796 | cutu_reader reader (this_cu, NULL, 1, false); |
c0ab21c2 TT |
7797 | |
7798 | if (!reader.dummy_p) | |
7799 | { | |
7800 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7801 | language_minimal); | |
7802 | ||
7803 | /* Check if comp unit has_children. | |
7804 | If so, read the rest of the partial symbols from this comp unit. | |
7805 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7806 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7807 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7808 | |
7809 | reader.keep (); | |
c0ab21c2 | 7810 | } |
ae038cb0 DJ |
7811 | } |
7812 | ||
ae038cb0 | 7813 | static void |
ed2dc618 | 7814 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 7815 | struct dwarf2_section_info *section, |
f1902523 | 7816 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 7817 | unsigned int is_dwz) |
ae038cb0 | 7818 | { |
d521ce57 | 7819 | const gdb_byte *info_ptr; |
ed2dc618 | 7820 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 7821 | |
b4f54984 | 7822 | if (dwarf_read_debug) |
bf6af496 | 7823 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
96b79293 TT |
7824 | section->get_name (), |
7825 | section->get_file_name ()); | |
bf6af496 | 7826 | |
96b79293 | 7827 | section->read (objfile); |
ae038cb0 | 7828 | |
36586728 | 7829 | info_ptr = section->buffer; |
6e70227d | 7830 | |
36586728 | 7831 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7832 | { |
ae038cb0 | 7833 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7834 | |
9c541725 | 7835 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7836 | |
f1902523 | 7837 | comp_unit_head cu_header; |
ed2dc618 SM |
7838 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
7839 | abbrev_section, info_ptr, | |
7840 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7841 | |
7842 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7843 | if (cu_header.unit_type != DW_UT_type) |
7844 | { | |
7845 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7846 | struct dwarf2_per_cu_data); | |
7847 | memset (this_cu, 0, sizeof (*this_cu)); | |
7848 | } | |
7849 | else | |
7850 | { | |
7851 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7852 | struct signatured_type); | |
7853 | memset (sig_type, 0, sizeof (*sig_type)); | |
7854 | sig_type->signature = cu_header.signature; | |
7855 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7856 | this_cu = &sig_type->per_cu; | |
7857 | } | |
7858 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7859 | this_cu->sect_off = sect_off; |
f1902523 | 7860 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7861 | this_cu->is_dwz = is_dwz; |
e3b94546 | 7862 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 7863 | this_cu->section = section; |
ae038cb0 | 7864 | |
b76e467d | 7865 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
7866 | |
7867 | info_ptr = info_ptr + this_cu->length; | |
7868 | } | |
36586728 TT |
7869 | } |
7870 | ||
7871 | /* Create a list of all compilation units in OBJFILE. | |
7872 | This is only done for -readnow and building partial symtabs. */ | |
7873 | ||
7874 | static void | |
ed2dc618 | 7875 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 7876 | { |
b76e467d | 7877 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 7878 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 7879 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 7880 | |
b76e467d | 7881 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 7882 | if (dwz != NULL) |
ed2dc618 | 7883 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 7884 | 1); |
c906108c SS |
7885 | } |
7886 | ||
5734ee8b | 7887 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7888 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7889 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7890 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7891 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7892 | |
72bf9492 DJ |
7893 | static void |
7894 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7895 | CORE_ADDR *highpc, int set_addrmap, |
7896 | struct dwarf2_cu *cu) | |
c906108c | 7897 | { |
72bf9492 | 7898 | struct partial_die_info *pdi; |
c906108c | 7899 | |
91c24f0a DC |
7900 | /* Now, march along the PDI's, descending into ones which have |
7901 | interesting children but skipping the children of the other ones, | |
7902 | until we reach the end of the compilation unit. */ | |
c906108c | 7903 | |
72bf9492 | 7904 | pdi = first_die; |
91c24f0a | 7905 | |
72bf9492 DJ |
7906 | while (pdi != NULL) |
7907 | { | |
52356b79 | 7908 | pdi->fixup (cu); |
c906108c | 7909 | |
f55ee35c | 7910 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7911 | children, so we need to look at them. Ditto for anonymous |
7912 | enums. */ | |
933c6fe4 | 7913 | |
72bf9492 | 7914 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 7915 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
7916 | || pdi->tag == DW_TAG_imported_unit |
7917 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 7918 | { |
72bf9492 | 7919 | switch (pdi->tag) |
c906108c SS |
7920 | { |
7921 | case DW_TAG_subprogram: | |
b1dc1806 | 7922 | case DW_TAG_inlined_subroutine: |
cdc07690 | 7923 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7924 | break; |
72929c62 | 7925 | case DW_TAG_constant: |
c906108c SS |
7926 | case DW_TAG_variable: |
7927 | case DW_TAG_typedef: | |
91c24f0a | 7928 | case DW_TAG_union_type: |
72bf9492 | 7929 | if (!pdi->is_declaration) |
63d06c5c | 7930 | { |
72bf9492 | 7931 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7932 | } |
7933 | break; | |
c906108c | 7934 | case DW_TAG_class_type: |
680b30c7 | 7935 | case DW_TAG_interface_type: |
c906108c | 7936 | case DW_TAG_structure_type: |
72bf9492 | 7937 | if (!pdi->is_declaration) |
c906108c | 7938 | { |
72bf9492 | 7939 | add_partial_symbol (pdi, cu); |
c906108c | 7940 | } |
b7fee5a3 KS |
7941 | if ((cu->language == language_rust |
7942 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
7943 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
7944 | set_addrmap, cu); | |
c906108c | 7945 | break; |
91c24f0a | 7946 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7947 | if (!pdi->is_declaration) |
7948 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7949 | break; |
7950 | case DW_TAG_base_type: | |
a02abb62 | 7951 | case DW_TAG_subrange_type: |
c906108c | 7952 | /* File scope base type definitions are added to the partial |
c5aa993b | 7953 | symbol table. */ |
72bf9492 | 7954 | add_partial_symbol (pdi, cu); |
c906108c | 7955 | break; |
d9fa45fe | 7956 | case DW_TAG_namespace: |
cdc07690 | 7957 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7958 | break; |
5d7cb8df | 7959 | case DW_TAG_module: |
59c35742 AB |
7960 | if (!pdi->is_declaration) |
7961 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 7962 | break; |
95554aad TT |
7963 | case DW_TAG_imported_unit: |
7964 | { | |
7965 | struct dwarf2_per_cu_data *per_cu; | |
7966 | ||
f4dc4d17 DE |
7967 | /* For now we don't handle imported units in type units. */ |
7968 | if (cu->per_cu->is_debug_types) | |
7969 | { | |
7970 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7971 | " supported in type units [in module %s]"), | |
518817b3 | 7972 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
7973 | } |
7974 | ||
e3b94546 SM |
7975 | per_cu = dwarf2_find_containing_comp_unit |
7976 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 7977 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
7978 | |
7979 | /* Go read the partial unit, if needed. */ | |
7980 | if (per_cu->v.psymtab == NULL) | |
135f5437 | 7981 | process_psymtab_comp_unit (per_cu, true, cu->language); |
95554aad | 7982 | |
ae640021 | 7983 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
7984 | } |
7985 | break; | |
74921315 KS |
7986 | case DW_TAG_imported_declaration: |
7987 | add_partial_symbol (pdi, cu); | |
7988 | break; | |
c906108c SS |
7989 | default: |
7990 | break; | |
7991 | } | |
7992 | } | |
7993 | ||
72bf9492 DJ |
7994 | /* If the die has a sibling, skip to the sibling. */ |
7995 | ||
7996 | pdi = pdi->die_sibling; | |
7997 | } | |
7998 | } | |
7999 | ||
8000 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8001 | |
72bf9492 | 8002 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8003 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8004 | Enumerators are an exception; they use the scope of their parent |
8005 | enumeration type, i.e. the name of the enumeration type is not | |
8006 | prepended to the enumerator. | |
91c24f0a | 8007 | |
72bf9492 DJ |
8008 | There are two complexities. One is DW_AT_specification; in this |
8009 | case "parent" means the parent of the target of the specification, | |
8010 | instead of the direct parent of the DIE. The other is compilers | |
8011 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8012 | the fully qualified name of structure types from their members' | |
8013 | linkage names. This must be done using the DIE's children rather | |
8014 | than the children of any DW_AT_specification target. We only need | |
8015 | to do this for structures at the top level, i.e. if the target of | |
8016 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8017 | have a parent. */ | |
8018 | ||
8019 | /* Compute the scope prefix associated with PDI's parent, in | |
8020 | compilation unit CU. The result will be allocated on CU's | |
8021 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8022 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8023 | static const char * |
72bf9492 DJ |
8024 | partial_die_parent_scope (struct partial_die_info *pdi, |
8025 | struct dwarf2_cu *cu) | |
8026 | { | |
15d034d0 | 8027 | const char *grandparent_scope; |
72bf9492 | 8028 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8029 | |
72bf9492 DJ |
8030 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8031 | then this means the parent of the specification DIE. */ | |
8032 | ||
8033 | real_pdi = pdi; | |
72bf9492 | 8034 | while (real_pdi->has_specification) |
fb816e8b | 8035 | { |
122cf0f2 AB |
8036 | auto res = find_partial_die (real_pdi->spec_offset, |
8037 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8038 | real_pdi = res.pdi; |
8039 | cu = res.cu; | |
8040 | } | |
72bf9492 DJ |
8041 | |
8042 | parent = real_pdi->die_parent; | |
8043 | if (parent == NULL) | |
8044 | return NULL; | |
8045 | ||
8046 | if (parent->scope_set) | |
8047 | return parent->scope; | |
8048 | ||
52356b79 | 8049 | parent->fixup (cu); |
72bf9492 | 8050 | |
10b3939b | 8051 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8052 | |
acebe513 UW |
8053 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8054 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8055 | Work around this problem here. */ | |
8056 | if (cu->language == language_cplus | |
6e70227d | 8057 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8058 | && strcmp (parent->name, "::") == 0 |
8059 | && grandparent_scope == NULL) | |
8060 | { | |
8061 | parent->scope = NULL; | |
8062 | parent->scope_set = 1; | |
8063 | return NULL; | |
8064 | } | |
8065 | ||
0a4b0913 | 8066 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8067 | if (pdi->tag == DW_TAG_enumerator) |
8068 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8069 | parent->scope = grandparent_scope; | |
8070 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8071 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8072 | || parent->tag == DW_TAG_structure_type |
8073 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8074 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8075 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8076 | || parent->tag == DW_TAG_enumeration_type |
8077 | || (cu->language == language_fortran | |
8078 | && parent->tag == DW_TAG_subprogram | |
8079 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8080 | { |
8081 | if (grandparent_scope == NULL) | |
8082 | parent->scope = parent->name; | |
8083 | else | |
3e43a32a MS |
8084 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8085 | grandparent_scope, | |
f55ee35c | 8086 | parent->name, 0, cu); |
72bf9492 | 8087 | } |
72bf9492 DJ |
8088 | else |
8089 | { | |
8090 | /* FIXME drow/2004-04-01: What should we be doing with | |
8091 | function-local names? For partial symbols, we should probably be | |
8092 | ignoring them. */ | |
fa9c3fa0 TT |
8093 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8094 | dwarf_tag_name (parent->tag), | |
8095 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8096 | parent->scope = grandparent_scope; |
c906108c SS |
8097 | } |
8098 | ||
72bf9492 DJ |
8099 | parent->scope_set = 1; |
8100 | return parent->scope; | |
8101 | } | |
8102 | ||
8103 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8104 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8105 | |
43816ebc | 8106 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
8107 | partial_die_full_name (struct partial_die_info *pdi, |
8108 | struct dwarf2_cu *cu) | |
8109 | { | |
15d034d0 | 8110 | const char *parent_scope; |
72bf9492 | 8111 | |
98bfdba5 PA |
8112 | /* If this is a template instantiation, we can not work out the |
8113 | template arguments from partial DIEs. So, unfortunately, we have | |
8114 | to go through the full DIEs. At least any work we do building | |
8115 | types here will be reused if full symbols are loaded later. */ | |
8116 | if (pdi->has_template_arguments) | |
8117 | { | |
52356b79 | 8118 | pdi->fixup (cu); |
98bfdba5 PA |
8119 | |
8120 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8121 | { | |
8122 | struct die_info *die; | |
8123 | struct attribute attr; | |
8124 | struct dwarf2_cu *ref_cu = cu; | |
8125 | ||
b64f50a1 | 8126 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8127 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8128 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8129 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8130 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8131 | ||
43816ebc | 8132 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
8133 | } |
8134 | } | |
8135 | ||
72bf9492 DJ |
8136 | parent_scope = partial_die_parent_scope (pdi, cu); |
8137 | if (parent_scope == NULL) | |
8138 | return NULL; | |
8139 | else | |
43816ebc TT |
8140 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
8141 | pdi->name, 0, cu)); | |
c906108c SS |
8142 | } |
8143 | ||
8144 | static void | |
72bf9492 | 8145 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8146 | { |
518817b3 SM |
8147 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8148 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8149 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8150 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8151 | CORE_ADDR addr = 0; |
15d034d0 | 8152 | const char *actual_name = NULL; |
e142c38c DJ |
8153 | CORE_ADDR baseaddr; |
8154 | ||
b3b3bada | 8155 | baseaddr = objfile->text_section_offset (); |
c906108c | 8156 | |
43816ebc TT |
8157 | gdb::unique_xmalloc_ptr<char> built_actual_name |
8158 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 8159 | if (built_actual_name != NULL) |
43816ebc | 8160 | actual_name = built_actual_name.get (); |
63d06c5c | 8161 | |
72bf9492 DJ |
8162 | if (actual_name == NULL) |
8163 | actual_name = pdi->name; | |
8164 | ||
c906108c SS |
8165 | switch (pdi->tag) |
8166 | { | |
b1dc1806 | 8167 | case DW_TAG_inlined_subroutine: |
c906108c | 8168 | case DW_TAG_subprogram: |
79748972 TT |
8169 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8170 | - baseaddr); | |
0a4b0913 AB |
8171 | if (pdi->is_external |
8172 | || cu->language == language_ada | |
8173 | || (cu->language == language_fortran | |
8174 | && pdi->die_parent != NULL | |
8175 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8176 | { | |
8177 | /* Normally, only "external" DIEs are part of the global scope. | |
8178 | But in Ada and Fortran, we want to be able to access nested | |
8179 | procedures globally. So all Ada and Fortran subprograms are | |
8180 | stored in the global scope. */ | |
31edb802 | 8181 | add_psymbol_to_list (actual_name, |
15d034d0 | 8182 | built_actual_name != NULL, |
f47fb265 | 8183 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8184 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8185 | psymbol_placement::GLOBAL, |
79748972 TT |
8186 | addr, |
8187 | cu->language, objfile); | |
c906108c SS |
8188 | } |
8189 | else | |
8190 | { | |
31edb802 | 8191 | add_psymbol_to_list (actual_name, |
15d034d0 | 8192 | built_actual_name != NULL, |
f47fb265 | 8193 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8194 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8195 | psymbol_placement::STATIC, |
1762568f | 8196 | addr, cu->language, objfile); |
c906108c | 8197 | } |
0c1b455e TT |
8198 | |
8199 | if (pdi->main_subprogram && actual_name != NULL) | |
8200 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8201 | break; |
72929c62 | 8202 | case DW_TAG_constant: |
31edb802 | 8203 | add_psymbol_to_list (actual_name, |
75aedd27 TT |
8204 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
8205 | -1, (pdi->is_external | |
8206 | ? psymbol_placement::GLOBAL | |
8207 | : psymbol_placement::STATIC), | |
8208 | 0, cu->language, objfile); | |
72929c62 | 8209 | break; |
c906108c | 8210 | case DW_TAG_variable: |
95554aad TT |
8211 | if (pdi->d.locdesc) |
8212 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8213 | |
95554aad | 8214 | if (pdi->d.locdesc |
caac4577 JG |
8215 | && addr == 0 |
8216 | && !dwarf2_per_objfile->has_section_at_zero) | |
8217 | { | |
8218 | /* A global or static variable may also have been stripped | |
8219 | out by the linker if unused, in which case its address | |
8220 | will be nullified; do not add such variables into partial | |
8221 | symbol table then. */ | |
8222 | } | |
8223 | else if (pdi->is_external) | |
c906108c SS |
8224 | { |
8225 | /* Global Variable. | |
8226 | Don't enter into the minimal symbol tables as there is | |
8227 | a minimal symbol table entry from the ELF symbols already. | |
8228 | Enter into partial symbol table if it has a location | |
8229 | descriptor or a type. | |
8230 | If the location descriptor is missing, new_symbol will create | |
8231 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8232 | be determined from the minimal symbol table whenever the variable | |
8233 | is referenced. | |
8234 | The address for the partial symbol table entry is not | |
8235 | used by GDB, but it comes in handy for debugging partial symbol | |
8236 | table building. */ | |
8237 | ||
95554aad | 8238 | if (pdi->d.locdesc || pdi->has_type) |
31edb802 | 8239 | add_psymbol_to_list (actual_name, |
15d034d0 | 8240 | built_actual_name != NULL, |
f47fb265 | 8241 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8242 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8243 | psymbol_placement::GLOBAL, |
79748972 | 8244 | addr, cu->language, objfile); |
c906108c SS |
8245 | } |
8246 | else | |
8247 | { | |
ff908ebf AW |
8248 | int has_loc = pdi->d.locdesc != NULL; |
8249 | ||
8250 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8251 | without location descriptors or constant values). */ | |
8252 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 8253 | return; |
ff908ebf | 8254 | |
31edb802 | 8255 | add_psymbol_to_list (actual_name, |
15d034d0 | 8256 | built_actual_name != NULL, |
f47fb265 | 8257 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8258 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8259 | psymbol_placement::STATIC, |
79748972 | 8260 | has_loc ? addr : 0, |
f47fb265 | 8261 | cu->language, objfile); |
c906108c SS |
8262 | } |
8263 | break; | |
8264 | case DW_TAG_typedef: | |
8265 | case DW_TAG_base_type: | |
a02abb62 | 8266 | case DW_TAG_subrange_type: |
31edb802 | 8267 | add_psymbol_to_list (actual_name, |
15d034d0 | 8268 | built_actual_name != NULL, |
79748972 | 8269 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8270 | psymbol_placement::STATIC, |
1762568f | 8271 | 0, cu->language, objfile); |
c906108c | 8272 | break; |
74921315 | 8273 | case DW_TAG_imported_declaration: |
72bf9492 | 8274 | case DW_TAG_namespace: |
31edb802 | 8275 | add_psymbol_to_list (actual_name, |
15d034d0 | 8276 | built_actual_name != NULL, |
79748972 | 8277 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8278 | psymbol_placement::GLOBAL, |
1762568f | 8279 | 0, cu->language, objfile); |
72bf9492 | 8280 | break; |
530e8392 | 8281 | case DW_TAG_module: |
a5fd13a9 BH |
8282 | /* With Fortran 77 there might be a "BLOCK DATA" module |
8283 | available without any name. If so, we skip the module as it | |
8284 | doesn't bring any value. */ | |
8285 | if (actual_name != nullptr) | |
31edb802 | 8286 | add_psymbol_to_list (actual_name, |
a5fd13a9 BH |
8287 | built_actual_name != NULL, |
8288 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
8289 | psymbol_placement::GLOBAL, | |
8290 | 0, cu->language, objfile); | |
530e8392 | 8291 | break; |
c906108c | 8292 | case DW_TAG_class_type: |
680b30c7 | 8293 | case DW_TAG_interface_type: |
c906108c SS |
8294 | case DW_TAG_structure_type: |
8295 | case DW_TAG_union_type: | |
8296 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8297 | /* Skip external references. The DWARF standard says in the section |
8298 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8299 | structure, union or class type is represented by a structure, | |
8300 | union or class entry that does not have a byte size attribute | |
8301 | and that has a DW_AT_declaration attribute." */ | |
8302 | if (!pdi->has_byte_size && pdi->is_declaration) | |
43816ebc | 8303 | return; |
fa4028e9 | 8304 | |
63d06c5c DC |
8305 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8306 | static vs. global. */ | |
31edb802 | 8307 | add_psymbol_to_list (actual_name, |
15d034d0 | 8308 | built_actual_name != NULL, |
79748972 | 8309 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 8310 | cu->language == language_cplus |
75aedd27 TT |
8311 | ? psymbol_placement::GLOBAL |
8312 | : psymbol_placement::STATIC, | |
1762568f | 8313 | 0, cu->language, objfile); |
c906108c | 8314 | |
c906108c SS |
8315 | break; |
8316 | case DW_TAG_enumerator: | |
31edb802 | 8317 | add_psymbol_to_list (actual_name, |
15d034d0 | 8318 | built_actual_name != NULL, |
79748972 | 8319 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 8320 | cu->language == language_cplus |
75aedd27 TT |
8321 | ? psymbol_placement::GLOBAL |
8322 | : psymbol_placement::STATIC, | |
1762568f | 8323 | 0, cu->language, objfile); |
c906108c SS |
8324 | break; |
8325 | default: | |
8326 | break; | |
8327 | } | |
8328 | } | |
8329 | ||
5c4e30ca DC |
8330 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8331 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8332 | the name of the enclosing namespace. */ | |
91c24f0a | 8333 | |
72bf9492 DJ |
8334 | static void |
8335 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8336 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8337 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8338 | { |
72bf9492 | 8339 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8340 | |
72bf9492 | 8341 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8342 | |
8343 | /* Now scan partial symbols in that namespace. */ | |
8344 | ||
91c24f0a | 8345 | if (pdi->has_children) |
cdc07690 | 8346 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8347 | } |
8348 | ||
5d7cb8df JK |
8349 | /* Read a partial die corresponding to a Fortran module. */ |
8350 | ||
8351 | static void | |
8352 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8353 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8354 | { |
530e8392 KB |
8355 | /* Add a symbol for the namespace. */ |
8356 | ||
8357 | add_partial_symbol (pdi, cu); | |
8358 | ||
f55ee35c | 8359 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8360 | |
8361 | if (pdi->has_children) | |
cdc07690 | 8362 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8363 | } |
8364 | ||
b1dc1806 XR |
8365 | /* Read a partial die corresponding to a subprogram or an inlined |
8366 | subprogram and create a partial symbol for that subprogram. | |
8367 | When the CU language allows it, this routine also defines a partial | |
8368 | symbol for each nested subprogram that this subprogram contains. | |
8369 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8370 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8371 | |
cdc07690 YQ |
8372 | PDI may also be a lexical block, in which case we simply search |
8373 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8374 | Again, this is only performed when the CU language allows this |
8375 | type of definitions. */ | |
8376 | ||
8377 | static void | |
8378 | add_partial_subprogram (struct partial_die_info *pdi, | |
8379 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8380 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8381 | { |
b1dc1806 | 8382 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8383 | { |
8384 | if (pdi->has_pc_info) | |
8385 | { | |
8386 | if (pdi->lowpc < *lowpc) | |
8387 | *lowpc = pdi->lowpc; | |
8388 | if (pdi->highpc > *highpc) | |
8389 | *highpc = pdi->highpc; | |
cdc07690 | 8390 | if (set_addrmap) |
5734ee8b | 8391 | { |
518817b3 | 8392 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
8393 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8394 | CORE_ADDR baseaddr; | |
b926417a TT |
8395 | CORE_ADDR this_highpc; |
8396 | CORE_ADDR this_lowpc; | |
5734ee8b | 8397 | |
b3b3bada | 8398 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8399 | this_lowpc |
8400 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8401 | pdi->lowpc + baseaddr) | |
8402 | - baseaddr); | |
8403 | this_highpc | |
8404 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8405 | pdi->highpc + baseaddr) | |
8406 | - baseaddr); | |
d320c2b5 | 8407 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 8408 | this_lowpc, this_highpc - 1, |
9291a0cd | 8409 | cu->per_cu->v.psymtab); |
5734ee8b | 8410 | } |
481860b3 GB |
8411 | } |
8412 | ||
8413 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8414 | { | |
bc30ff58 | 8415 | if (!pdi->is_declaration) |
e8d05480 JB |
8416 | /* Ignore subprogram DIEs that do not have a name, they are |
8417 | illegal. Do not emit a complaint at this point, we will | |
8418 | do so when we convert this psymtab into a symtab. */ | |
8419 | if (pdi->name) | |
8420 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8421 | } |
8422 | } | |
6e70227d | 8423 | |
bc30ff58 JB |
8424 | if (! pdi->has_children) |
8425 | return; | |
8426 | ||
0a4b0913 | 8427 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8428 | { |
8429 | pdi = pdi->die_child; | |
8430 | while (pdi != NULL) | |
8431 | { | |
52356b79 | 8432 | pdi->fixup (cu); |
bc30ff58 | 8433 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8434 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8435 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8436 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8437 | pdi = pdi->die_sibling; |
8438 | } | |
8439 | } | |
8440 | } | |
8441 | ||
91c24f0a DC |
8442 | /* Read a partial die corresponding to an enumeration type. */ |
8443 | ||
72bf9492 DJ |
8444 | static void |
8445 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8446 | struct dwarf2_cu *cu) | |
91c24f0a | 8447 | { |
72bf9492 | 8448 | struct partial_die_info *pdi; |
91c24f0a DC |
8449 | |
8450 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8451 | add_partial_symbol (enum_pdi, cu); |
8452 | ||
8453 | pdi = enum_pdi->die_child; | |
8454 | while (pdi) | |
91c24f0a | 8455 | { |
72bf9492 | 8456 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 8457 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8458 | else |
72bf9492 DJ |
8459 | add_partial_symbol (pdi, cu); |
8460 | pdi = pdi->die_sibling; | |
91c24f0a | 8461 | } |
91c24f0a DC |
8462 | } |
8463 | ||
6caca83c CC |
8464 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8465 | ||
8466 | static unsigned int | |
d521ce57 | 8467 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8468 | { |
8469 | unsigned int bytes_read; | |
8470 | ||
8471 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8472 | } | |
8473 | ||
685af9cd TT |
8474 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8475 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8476 | ||
4bb7a0a7 DJ |
8477 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8478 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8479 | the initial number. */ | |
8480 | ||
8481 | static struct abbrev_info * | |
685af9cd TT |
8482 | peek_die_abbrev (const die_reader_specs &reader, |
8483 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8484 | { |
685af9cd | 8485 | dwarf2_cu *cu = reader.cu; |
518817b3 | 8486 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
8487 | unsigned int abbrev_number |
8488 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8489 | |
8490 | if (abbrev_number == 0) | |
8491 | return NULL; | |
8492 | ||
685af9cd | 8493 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
8494 | if (!abbrev) |
8495 | { | |
422b9917 | 8496 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8497 | " at offset %s [in module %s]"), |
422b9917 | 8498 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8499 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8500 | } |
8501 | ||
8502 | return abbrev; | |
8503 | } | |
8504 | ||
93311388 DE |
8505 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8506 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8507 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8508 | ||
d521ce57 TT |
8509 | static const gdb_byte * |
8510 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8511 | { |
4bb7a0a7 DJ |
8512 | while (1) |
8513 | { | |
685af9cd TT |
8514 | unsigned int bytes_read; |
8515 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
8516 | ||
4bb7a0a7 DJ |
8517 | if (abbrev == NULL) |
8518 | return info_ptr + bytes_read; | |
8519 | else | |
dee91e82 | 8520 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8521 | } |
8522 | } | |
8523 | ||
93311388 DE |
8524 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8525 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8526 | abbrev corresponding to that skipped uleb128 should be passed in |
8527 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8528 | children. */ | |
8529 | ||
d521ce57 TT |
8530 | static const gdb_byte * |
8531 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8532 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8533 | { |
8534 | unsigned int bytes_read; | |
8535 | struct attribute attr; | |
dee91e82 DE |
8536 | bfd *abfd = reader->abfd; |
8537 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8538 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8539 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8540 | unsigned int form, i; |
8541 | ||
8542 | for (i = 0; i < abbrev->num_attrs; i++) | |
8543 | { | |
8544 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8545 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8546 | { | |
18a8505e AT |
8547 | bool ignored; |
8548 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr, | |
8549 | &ignored); | |
4bb7a0a7 | 8550 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8551 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8552 | else |
b9502d3f | 8553 | { |
9c541725 PA |
8554 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8555 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8556 | |
8557 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8558 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
8559 | else if (sibling_ptr > reader->buffer_end) |
8560 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
8561 | else |
8562 | return sibling_ptr; | |
8563 | } | |
4bb7a0a7 DJ |
8564 | } |
8565 | ||
8566 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8567 | form = abbrev->attrs[i].form; | |
8568 | skip_attribute: | |
8569 | switch (form) | |
8570 | { | |
4bb7a0a7 | 8571 | case DW_FORM_ref_addr: |
ae411497 TT |
8572 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8573 | and later it is offset sized. */ | |
8574 | if (cu->header.version == 2) | |
8575 | info_ptr += cu->header.addr_size; | |
8576 | else | |
8577 | info_ptr += cu->header.offset_size; | |
8578 | break; | |
36586728 TT |
8579 | case DW_FORM_GNU_ref_alt: |
8580 | info_ptr += cu->header.offset_size; | |
8581 | break; | |
ae411497 | 8582 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8583 | info_ptr += cu->header.addr_size; |
8584 | break; | |
8585 | case DW_FORM_data1: | |
8586 | case DW_FORM_ref1: | |
8587 | case DW_FORM_flag: | |
8fe0f950 | 8588 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8589 | info_ptr += 1; |
8590 | break; | |
2dc7f7b3 | 8591 | case DW_FORM_flag_present: |
43988095 | 8592 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8593 | break; |
4bb7a0a7 DJ |
8594 | case DW_FORM_data2: |
8595 | case DW_FORM_ref2: | |
8fe0f950 | 8596 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8597 | info_ptr += 2; |
8598 | break; | |
8fe0f950 AT |
8599 | case DW_FORM_strx3: |
8600 | info_ptr += 3; | |
8601 | break; | |
4bb7a0a7 DJ |
8602 | case DW_FORM_data4: |
8603 | case DW_FORM_ref4: | |
8fe0f950 | 8604 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8605 | info_ptr += 4; |
8606 | break; | |
8607 | case DW_FORM_data8: | |
8608 | case DW_FORM_ref8: | |
55f1336d | 8609 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8610 | info_ptr += 8; |
8611 | break; | |
0224619f JK |
8612 | case DW_FORM_data16: |
8613 | info_ptr += 16; | |
8614 | break; | |
4bb7a0a7 | 8615 | case DW_FORM_string: |
9b1c24c8 | 8616 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8617 | info_ptr += bytes_read; |
8618 | break; | |
2dc7f7b3 | 8619 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8620 | case DW_FORM_strp: |
36586728 | 8621 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8622 | info_ptr += cu->header.offset_size; |
8623 | break; | |
2dc7f7b3 | 8624 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8625 | case DW_FORM_block: |
8626 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8627 | info_ptr += bytes_read; | |
8628 | break; | |
8629 | case DW_FORM_block1: | |
8630 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8631 | break; | |
8632 | case DW_FORM_block2: | |
8633 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8634 | break; | |
8635 | case DW_FORM_block4: | |
8636 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8637 | break; | |
336d760d | 8638 | case DW_FORM_addrx: |
cf532bd1 | 8639 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8640 | case DW_FORM_sdata: |
8641 | case DW_FORM_udata: | |
8642 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8643 | case DW_FORM_GNU_addr_index: |
8644 | case DW_FORM_GNU_str_index: | |
18a8505e | 8645 | case DW_FORM_rnglistx: |
d521ce57 | 8646 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8647 | break; |
8648 | case DW_FORM_indirect: | |
8649 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8650 | info_ptr += bytes_read; | |
8651 | /* We need to continue parsing from here, so just go back to | |
8652 | the top. */ | |
8653 | goto skip_attribute; | |
8654 | ||
8655 | default: | |
3e43a32a MS |
8656 | error (_("Dwarf Error: Cannot handle %s " |
8657 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8658 | dwarf_form_name (form), |
8659 | bfd_get_filename (abfd)); | |
8660 | } | |
8661 | } | |
8662 | ||
8663 | if (abbrev->has_children) | |
dee91e82 | 8664 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8665 | else |
8666 | return info_ptr; | |
8667 | } | |
8668 | ||
93311388 | 8669 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8670 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8671 | |
d521ce57 | 8672 | static const gdb_byte * |
dee91e82 DE |
8673 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8674 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8675 | const gdb_byte *info_ptr) |
91c24f0a DC |
8676 | { |
8677 | /* Do we know the sibling already? */ | |
72bf9492 | 8678 | |
91c24f0a DC |
8679 | if (orig_pdi->sibling) |
8680 | return orig_pdi->sibling; | |
8681 | ||
8682 | /* Are there any children to deal with? */ | |
8683 | ||
8684 | if (!orig_pdi->has_children) | |
8685 | return info_ptr; | |
8686 | ||
4bb7a0a7 | 8687 | /* Skip the children the long way. */ |
91c24f0a | 8688 | |
dee91e82 | 8689 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8690 | } |
8691 | ||
257e7a09 | 8692 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8693 | not NULL. */ |
c906108c | 8694 | |
891813be TT |
8695 | void |
8696 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8697 | { |
ed2dc618 SM |
8698 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8699 | = get_dwarf2_per_objfile (objfile); | |
8700 | ||
077cbab2 TT |
8701 | gdb_assert (!readin); |
8702 | /* If this psymtab is constructed from a debug-only objfile, the | |
8703 | has_section_at_zero flag will not necessarily be correct. We | |
8704 | can get the correct value for this flag by looking at the data | |
8705 | associated with the (presumably stripped) associated objfile. */ | |
8706 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8707 | { |
077cbab2 TT |
8708 | struct dwarf2_per_objfile *dpo_backlink |
8709 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); | |
c906108c | 8710 | |
077cbab2 TT |
8711 | dwarf2_per_objfile->has_section_at_zero |
8712 | = dpo_backlink->has_section_at_zero; | |
8713 | } | |
98bfdba5 | 8714 | |
8566b89b | 8715 | expand_psymtab (objfile); |
95554aad | 8716 | |
ed2dc618 | 8717 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 8718 | } |
9cdd5dbd DE |
8719 | \f |
8720 | /* Reading in full CUs. */ | |
c906108c | 8721 | |
10b3939b DJ |
8722 | /* Add PER_CU to the queue. */ |
8723 | ||
8724 | static void | |
95554aad TT |
8725 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8726 | enum language pretend_language) | |
10b3939b | 8727 | { |
10b3939b | 8728 | per_cu->queued = 1; |
39856def | 8729 | per_cu->dwarf2_per_objfile->queue.emplace (per_cu, pretend_language); |
10b3939b DJ |
8730 | } |
8731 | ||
89e63ee4 DE |
8732 | /* If PER_CU is not yet queued, add it to the queue. |
8733 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8734 | dependency. | |
0907af0c | 8735 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8736 | meaning either PER_CU is already queued or it is already loaded. |
8737 | ||
8738 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8739 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8740 | |
8741 | static int | |
89e63ee4 | 8742 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8743 | struct dwarf2_per_cu_data *per_cu, |
8744 | enum language pretend_language) | |
8745 | { | |
8746 | /* We may arrive here during partial symbol reading, if we need full | |
8747 | DIEs to process an unusual case (e.g. template arguments). Do | |
8748 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 8749 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
8750 | { |
8751 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8752 | return 1; | |
8753 | return 0; | |
8754 | } | |
8755 | ||
8756 | /* Mark the dependence relation so that we don't flush PER_CU | |
8757 | too early. */ | |
89e63ee4 DE |
8758 | if (dependent_cu != NULL) |
8759 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8760 | |
8761 | /* If it's already on the queue, we have nothing to do. */ | |
8762 | if (per_cu->queued) | |
8763 | return 0; | |
8764 | ||
8765 | /* If the compilation unit is already loaded, just mark it as | |
8766 | used. */ | |
8767 | if (per_cu->cu != NULL) | |
8768 | { | |
8769 | per_cu->cu->last_used = 0; | |
8770 | return 0; | |
8771 | } | |
8772 | ||
8773 | /* Add it to the queue. */ | |
8774 | queue_comp_unit (per_cu, pretend_language); | |
8775 | ||
8776 | return 1; | |
8777 | } | |
8778 | ||
10b3939b DJ |
8779 | /* Process the queue. */ |
8780 | ||
8781 | static void | |
ed2dc618 | 8782 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b | 8783 | { |
b4f54984 | 8784 | if (dwarf_read_debug) |
45cfd468 DE |
8785 | { |
8786 | fprintf_unfiltered (gdb_stdlog, | |
8787 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8788 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8789 | } |
8790 | ||
03dd20cc DJ |
8791 | /* The queue starts out with one item, but following a DIE reference |
8792 | may load a new CU, adding it to the end of the queue. */ | |
39856def | 8793 | while (!dwarf2_per_objfile->queue.empty ()) |
10b3939b | 8794 | { |
39856def TT |
8795 | dwarf2_queue_item &item = dwarf2_per_objfile->queue.front (); |
8796 | ||
cc12ce38 | 8797 | if ((dwarf2_per_objfile->using_index |
39856def TT |
8798 | ? !item.per_cu->v.quick->compunit_symtab |
8799 | : (item.per_cu->v.psymtab && !item.per_cu->v.psymtab->readin)) | |
cc12ce38 | 8800 | /* Skip dummy CUs. */ |
39856def | 8801 | && item.per_cu->cu != NULL) |
f4dc4d17 | 8802 | { |
39856def | 8803 | struct dwarf2_per_cu_data *per_cu = item.per_cu; |
73be47f5 | 8804 | unsigned int debug_print_threshold; |
247f5c4f | 8805 | char buf[100]; |
f4dc4d17 | 8806 | |
247f5c4f | 8807 | if (per_cu->is_debug_types) |
f4dc4d17 | 8808 | { |
247f5c4f DE |
8809 | struct signatured_type *sig_type = |
8810 | (struct signatured_type *) per_cu; | |
8811 | ||
9d8780f0 | 8812 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 8813 | hex_string (sig_type->signature), |
9d8780f0 | 8814 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
8815 | /* There can be 100s of TUs. |
8816 | Only print them in verbose mode. */ | |
8817 | debug_print_threshold = 2; | |
f4dc4d17 | 8818 | } |
247f5c4f | 8819 | else |
73be47f5 | 8820 | { |
9d8780f0 SM |
8821 | sprintf (buf, "CU at offset %s", |
8822 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
8823 | debug_print_threshold = 1; |
8824 | } | |
247f5c4f | 8825 | |
b4f54984 | 8826 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8827 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8828 | |
8829 | if (per_cu->is_debug_types) | |
39856def | 8830 | process_full_type_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8831 | else |
39856def | 8832 | process_full_comp_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8833 | |
b4f54984 | 8834 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8835 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8836 | } |
10b3939b | 8837 | |
39856def TT |
8838 | item.per_cu->queued = 0; |
8839 | dwarf2_per_objfile->queue.pop (); | |
10b3939b DJ |
8840 | } |
8841 | ||
b4f54984 | 8842 | if (dwarf_read_debug) |
45cfd468 DE |
8843 | { |
8844 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8845 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8846 | } |
10b3939b DJ |
8847 | } |
8848 | ||
10b3939b DJ |
8849 | /* Read in full symbols for PST, and anything it depends on. */ |
8850 | ||
8566b89b TT |
8851 | void |
8852 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8853 | { |
10b3939b | 8854 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 | 8855 | |
8566b89b | 8856 | if (readin) |
95554aad TT |
8857 | return; |
8858 | ||
0494dbec | 8859 | read_dependencies (objfile); |
aaa75496 | 8860 | |
8566b89b | 8861 | per_cu = per_cu_data; |
10b3939b DJ |
8862 | |
8863 | if (per_cu == NULL) | |
aaa75496 JB |
8864 | { |
8865 | /* It's an include file, no symbols to read for it. | |
8866 | Everything is in the parent symtab. */ | |
8566b89b | 8867 | readin = true; |
aaa75496 JB |
8868 | return; |
8869 | } | |
c906108c | 8870 | |
58f0c718 | 8871 | dw2_do_instantiate_symtab (per_cu, false); |
10b3939b DJ |
8872 | } |
8873 | ||
dee91e82 DE |
8874 | /* Trivial hash function for die_info: the hash value of a DIE |
8875 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8876 | |
dee91e82 DE |
8877 | static hashval_t |
8878 | die_hash (const void *item) | |
10b3939b | 8879 | { |
9a3c8263 | 8880 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8881 | |
9c541725 | 8882 | return to_underlying (die->sect_off); |
dee91e82 | 8883 | } |
63d06c5c | 8884 | |
dee91e82 DE |
8885 | /* Trivial comparison function for die_info structures: two DIEs |
8886 | are equal if they have the same offset. */ | |
98bfdba5 | 8887 | |
dee91e82 DE |
8888 | static int |
8889 | die_eq (const void *item_lhs, const void *item_rhs) | |
8890 | { | |
9a3c8263 SM |
8891 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8892 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8893 | |
9c541725 | 8894 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8895 | } |
c906108c | 8896 | |
c0ab21c2 | 8897 | /* Load the DIEs associated with PER_CU into memory. */ |
c906108c | 8898 | |
dee91e82 | 8899 | static void |
c0ab21c2 TT |
8900 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8901 | bool skip_partial, | |
8902 | enum language pretend_language) | |
dee91e82 | 8903 | { |
c0ab21c2 TT |
8904 | gdb_assert (! this_cu->is_debug_types); |
8905 | ||
6751ebae | 8906 | cutu_reader reader (this_cu, NULL, 1, skip_partial); |
c0ab21c2 TT |
8907 | if (reader.dummy_p) |
8908 | return; | |
8909 | ||
8910 | struct dwarf2_cu *cu = reader.cu; | |
8911 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 8912 | |
dee91e82 DE |
8913 | gdb_assert (cu->die_hash == NULL); |
8914 | cu->die_hash = | |
8915 | htab_create_alloc_ex (cu->header.length / 12, | |
8916 | die_hash, | |
8917 | die_eq, | |
8918 | NULL, | |
8919 | &cu->comp_unit_obstack, | |
8920 | hashtab_obstack_allocate, | |
8921 | dummy_obstack_deallocate); | |
e142c38c | 8922 | |
3e225074 | 8923 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
8924 | reader.comp_unit_die->child |
8925 | = read_die_and_siblings (&reader, reader.info_ptr, | |
8926 | &info_ptr, reader.comp_unit_die); | |
8927 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 8928 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
8929 | |
8930 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8931 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8932 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8933 | or we won't be able to build types correctly. |
8934 | Similarly, if we do not read the producer, we can not apply | |
8935 | producer-specific interpretation. */ | |
c0ab21c2 | 8936 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
8937 | |
8938 | reader.keep (); | |
10b3939b DJ |
8939 | } |
8940 | ||
3da10d80 KS |
8941 | /* Add a DIE to the delayed physname list. */ |
8942 | ||
8943 | static void | |
8944 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8945 | const char *name, struct die_info *die, | |
8946 | struct dwarf2_cu *cu) | |
8947 | { | |
8948 | struct delayed_method_info mi; | |
8949 | mi.type = type; | |
8950 | mi.fnfield_index = fnfield_index; | |
8951 | mi.index = index; | |
8952 | mi.name = name; | |
8953 | mi.die = die; | |
c89b44cd | 8954 | cu->method_list.push_back (mi); |
3da10d80 KS |
8955 | } |
8956 | ||
3693fdb3 PA |
8957 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8958 | "const" / "volatile". If so, decrements LEN by the length of the | |
8959 | modifier and return true. Otherwise return false. */ | |
8960 | ||
8961 | template<size_t N> | |
8962 | static bool | |
8963 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8964 | { | |
8965 | size_t mod_len = sizeof (mod) - 1; | |
8966 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8967 | { | |
8968 | len -= mod_len; | |
8969 | return true; | |
8970 | } | |
8971 | return false; | |
8972 | } | |
8973 | ||
3da10d80 KS |
8974 | /* Compute the physnames of any methods on the CU's method list. |
8975 | ||
8976 | The computation of method physnames is delayed in order to avoid the | |
8977 | (bad) condition that one of the method's formal parameters is of an as yet | |
8978 | incomplete type. */ | |
8979 | ||
8980 | static void | |
8981 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8982 | { | |
3693fdb3 | 8983 | /* Only C++ delays computing physnames. */ |
c89b44cd | 8984 | if (cu->method_list.empty ()) |
3693fdb3 PA |
8985 | return; |
8986 | gdb_assert (cu->language == language_cplus); | |
8987 | ||
52941706 | 8988 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 8989 | { |
1d06ead6 | 8990 | const char *physname; |
3da10d80 | 8991 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
8992 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
8993 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
8994 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 8995 | = physname ? physname : ""; |
3693fdb3 PA |
8996 | |
8997 | /* Since there's no tag to indicate whether a method is a | |
8998 | const/volatile overload, extract that information out of the | |
8999 | demangled name. */ | |
9000 | if (physname != NULL) | |
9001 | { | |
9002 | size_t len = strlen (physname); | |
9003 | ||
9004 | while (1) | |
9005 | { | |
9006 | if (physname[len] == ')') /* shortcut */ | |
9007 | break; | |
9008 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9009 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9010 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9011 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9012 | else |
9013 | break; | |
9014 | } | |
9015 | } | |
3da10d80 | 9016 | } |
c89b44cd TT |
9017 | |
9018 | /* The list is no longer needed. */ | |
9019 | cu->method_list.clear (); | |
3da10d80 KS |
9020 | } |
9021 | ||
a766d390 DE |
9022 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9023 | and it's not clear if/how imported objects will appear. | |
9024 | To keep Go support simple until that's worked out, | |
9025 | go back through what we've read and create something usable. | |
9026 | We could do this while processing each DIE, and feels kinda cleaner, | |
9027 | but that way is more invasive. | |
9028 | This is to, for example, allow the user to type "p var" or "b main" | |
9029 | without having to specify the package name, and allow lookups | |
9030 | of module.object to work in contexts that use the expression | |
9031 | parser. */ | |
9032 | ||
9033 | static void | |
9034 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9035 | { | |
421d1616 | 9036 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
9037 | struct pending *list; |
9038 | int i; | |
9039 | ||
c24bdb02 | 9040 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9041 | list != NULL; |
9042 | list = list->next) | |
a766d390 DE |
9043 | { |
9044 | for (i = 0; i < list->nsyms; ++i) | |
9045 | { | |
9046 | struct symbol *sym = list->symbol[i]; | |
9047 | ||
c1b5c1eb | 9048 | if (sym->language () == language_go |
a766d390 DE |
9049 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
9050 | { | |
421d1616 TT |
9051 | gdb::unique_xmalloc_ptr<char> this_package_name |
9052 | (go_symbol_package_name (sym)); | |
a766d390 DE |
9053 | |
9054 | if (this_package_name == NULL) | |
9055 | continue; | |
9056 | if (package_name == NULL) | |
421d1616 | 9057 | package_name = std::move (this_package_name); |
a766d390 DE |
9058 | else |
9059 | { | |
518817b3 SM |
9060 | struct objfile *objfile |
9061 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
421d1616 | 9062 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 9063 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9064 | (symbol_symtab (sym) != NULL |
9065 | ? symtab_to_filename_for_display | |
9066 | (symbol_symtab (sym)) | |
e3b94546 | 9067 | : objfile_name (objfile)), |
421d1616 | 9068 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
9069 | } |
9070 | } | |
9071 | } | |
9072 | } | |
9073 | ||
9074 | if (package_name != NULL) | |
9075 | { | |
518817b3 | 9076 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
34a68019 | 9077 | const char *saved_package_name |
421d1616 | 9078 | = obstack_strdup (&objfile->per_bfd->storage_obstack, package_name.get ()); |
19f392bc UW |
9079 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9080 | saved_package_name); | |
a766d390 DE |
9081 | struct symbol *sym; |
9082 | ||
e623cf5d | 9083 | sym = allocate_symbol (objfile); |
d3ecddab | 9084 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 9085 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
9086 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9087 | e.g., "main" finds the "main" module and not C's main(). */ | |
9088 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9089 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9090 | SYMBOL_TYPE (sym) = type; |
9091 | ||
c24bdb02 | 9092 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9093 | } |
9094 | } | |
9095 | ||
c9317f21 TT |
9096 | /* Allocate a fully-qualified name consisting of the two parts on the |
9097 | obstack. */ | |
9098 | ||
9099 | static const char * | |
9100 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9101 | { | |
9102 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9103 | } | |
9104 | ||
9105 | /* A helper that allocates a struct discriminant_info to attach to a | |
9106 | union type. */ | |
9107 | ||
9108 | static struct discriminant_info * | |
9109 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9110 | int default_index) | |
9111 | { | |
9112 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9113 | gdb_assert (discriminant_index == -1 |
9114 | || (discriminant_index >= 0 | |
9115 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9116 | gdb_assert (default_index == -1 |
c7b15a66 | 9117 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9118 | |
9119 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9120 | ||
9121 | struct discriminant_info *disc | |
9122 | = ((struct discriminant_info *) | |
9123 | TYPE_ZALLOC (type, | |
9124 | offsetof (struct discriminant_info, discriminants) | |
9125 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9126 | disc->default_index = default_index; | |
9127 | disc->discriminant_index = discriminant_index; | |
9128 | ||
9129 | struct dynamic_prop prop; | |
9130 | prop.kind = PROP_UNDEFINED; | |
9131 | prop.data.baton = disc; | |
9132 | ||
9133 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9134 | ||
9135 | return disc; | |
9136 | } | |
9137 | ||
9138 | /* Some versions of rustc emitted enums in an unusual way. | |
9139 | ||
9140 | Ordinary enums were emitted as unions. The first element of each | |
9141 | structure in the union was named "RUST$ENUM$DISR". This element | |
9142 | held the discriminant. | |
9143 | ||
9144 | These versions of Rust also implemented the "non-zero" | |
9145 | optimization. When the enum had two values, and one is empty and | |
9146 | the other holds a pointer that cannot be zero, the pointer is used | |
9147 | as the discriminant, with a zero value meaning the empty variant. | |
9148 | Here, the union's first member is of the form | |
9149 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9150 | where the fieldnos are the indices of the fields that should be | |
9151 | traversed in order to find the field (which may be several fields deep) | |
9152 | and the variantname is the name of the variant of the case when the | |
9153 | field is zero. | |
9154 | ||
9155 | This function recognizes whether TYPE is of one of these forms, | |
9156 | and, if so, smashes it to be a variant type. */ | |
9157 | ||
9158 | static void | |
9159 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9160 | { | |
9161 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9162 | ||
9163 | /* We don't need to deal with empty enums. */ | |
9164 | if (TYPE_NFIELDS (type) == 0) | |
9165 | return; | |
9166 | ||
9167 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9168 | if (TYPE_NFIELDS (type) == 1 | |
9169 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9170 | { | |
9171 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9172 | ||
9173 | /* Decode the field name to find the offset of the | |
9174 | discriminant. */ | |
9175 | ULONGEST bit_offset = 0; | |
9176 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9177 | while (name[0] >= '0' && name[0] <= '9') | |
9178 | { | |
9179 | char *tail; | |
9180 | unsigned long index = strtoul (name, &tail, 10); | |
9181 | name = tail; | |
9182 | if (*name != '$' | |
9183 | || index >= TYPE_NFIELDS (field_type) | |
9184 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9185 | != FIELD_LOC_KIND_BITPOS)) | |
9186 | { | |
b98664d3 | 9187 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9188 | "[in module %s]"), |
9189 | TYPE_FIELD_NAME (type, 0), | |
9190 | objfile_name (objfile)); | |
9191 | return; | |
9192 | } | |
9193 | ++name; | |
9194 | ||
9195 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9196 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9197 | } | |
9198 | ||
9199 | /* Make a union to hold the variants. */ | |
9200 | struct type *union_type = alloc_type (objfile); | |
9201 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9202 | TYPE_NFIELDS (union_type) = 3; | |
9203 | TYPE_FIELDS (union_type) | |
9204 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
9205 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9206 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9207 | |
9208 | /* Put the discriminant must at index 0. */ | |
9209 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
9210 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9211 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9212 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
9213 | ||
9214 | /* The order of fields doesn't really matter, so put the real | |
9215 | field at index 1 and the data-less field at index 2. */ | |
9216 | struct discriminant_info *disc | |
9217 | = alloc_discriminant_info (union_type, 0, 1); | |
9218 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
9219 | TYPE_FIELD_NAME (union_type, 1) | |
9220 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
9221 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
9222 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9223 | TYPE_FIELD_NAME (union_type, 1)); | |
9224 | ||
9225 | const char *dataless_name | |
9226 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9227 | name); | |
9228 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9229 | dataless_name); | |
9230 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
9231 | /* NAME points into the original discriminant name, which | |
9232 | already has the correct lifetime. */ | |
9233 | TYPE_FIELD_NAME (union_type, 2) = name; | |
9234 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
9235 | disc->discriminants[2] = 0; | |
9236 | ||
9237 | /* Smash this type to be a structure type. We have to do this | |
9238 | because the type has already been recorded. */ | |
9239 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9240 | TYPE_NFIELDS (type) = 1; | |
9241 | TYPE_FIELDS (type) | |
9242 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
9243 | ||
9244 | /* Install the variant part. */ | |
9245 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9246 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9247 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9248 | } | |
77c2dba3 TT |
9249 | /* A union with a single anonymous field is probably an old-style |
9250 | univariant enum. */ | |
9251 | else if (TYPE_NFIELDS (type) == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) | |
c9317f21 | 9252 | { |
c9317f21 TT |
9253 | /* Smash this type to be a structure type. We have to do this |
9254 | because the type has already been recorded. */ | |
9255 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9256 | ||
9257 | /* Make a union to hold the variants. */ | |
9258 | struct type *union_type = alloc_type (objfile); | |
9259 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9260 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
9261 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9262 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9263 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
9264 | ||
9265 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
9266 | const char *variant_name | |
9267 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
9268 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
9269 | TYPE_NAME (field_type) | |
9270 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 9271 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
9272 | |
9273 | /* Install the union in the outer struct type. */ | |
9274 | TYPE_NFIELDS (type) = 1; | |
9275 | TYPE_FIELDS (type) | |
9276 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
9277 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9278 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9279 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9280 | ||
9281 | alloc_discriminant_info (union_type, -1, 0); | |
9282 | } | |
9283 | else | |
9284 | { | |
9285 | struct type *disr_type = nullptr; | |
9286 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9287 | { | |
9288 | disr_type = TYPE_FIELD_TYPE (type, i); | |
9289 | ||
a037790e TT |
9290 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
9291 | { | |
9292 | /* All fields of a true enum will be structs. */ | |
9293 | return; | |
9294 | } | |
9295 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
9296 | { |
9297 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9298 | disr_type = nullptr; |
c9317f21 TT |
9299 | } |
9300 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9301 | "RUST$ENUM$DISR") != 0) | |
9302 | { | |
9303 | /* Not a Rust enum. */ | |
9304 | return; | |
9305 | } | |
9306 | else | |
9307 | { | |
9308 | /* Found one. */ | |
9309 | break; | |
9310 | } | |
9311 | } | |
9312 | ||
9313 | /* If we got here without a discriminant, then it's probably | |
9314 | just a union. */ | |
9315 | if (disr_type == nullptr) | |
9316 | return; | |
9317 | ||
9318 | /* Smash this type to be a structure type. We have to do this | |
9319 | because the type has already been recorded. */ | |
9320 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9321 | ||
9322 | /* Make a union to hold the variants. */ | |
9323 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
9324 | struct type *union_type = alloc_type (objfile); | |
9325 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9326 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
9327 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9328 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9329 | TYPE_FIELDS (union_type) |
9330 | = (struct field *) TYPE_ZALLOC (union_type, | |
9331 | (TYPE_NFIELDS (union_type) | |
9332 | * sizeof (struct field))); | |
9333 | ||
9334 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
9335 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
9336 | ||
9337 | /* Install the discriminant at index 0 in the union. */ | |
9338 | TYPE_FIELD (union_type, 0) = *disr_field; | |
9339 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9340 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9341 | ||
9342 | /* Install the union in the outer struct type. */ | |
9343 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9344 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9345 | TYPE_NFIELDS (type) = 1; | |
9346 | ||
9347 | /* Set the size and offset of the union type. */ | |
9348 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9349 | ||
9350 | /* We need a way to find the correct discriminant given a | |
9351 | variant name. For convenience we build a map here. */ | |
9352 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
9353 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
9354 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
9355 | { | |
9356 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9357 | { | |
9358 | const char *name | |
9359 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9360 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9361 | } | |
9362 | } | |
9363 | ||
9364 | int n_fields = TYPE_NFIELDS (union_type); | |
9365 | struct discriminant_info *disc | |
9366 | = alloc_discriminant_info (union_type, 0, -1); | |
9367 | /* Skip the discriminant here. */ | |
9368 | for (int i = 1; i < n_fields; ++i) | |
9369 | { | |
9370 | /* Find the final word in the name of this variant's type. | |
9371 | That name can be used to look up the correct | |
9372 | discriminant. */ | |
9373 | const char *variant_name | |
9374 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
9375 | i))); | |
9376 | ||
9377 | auto iter = discriminant_map.find (variant_name); | |
9378 | if (iter != discriminant_map.end ()) | |
9379 | disc->discriminants[i] = iter->second; | |
9380 | ||
bedda9ac | 9381 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 9382 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
9383 | if (TYPE_NFIELDS (sub_type) > 0) |
9384 | { | |
9385 | --TYPE_NFIELDS (sub_type); | |
9386 | ++TYPE_FIELDS (sub_type); | |
9387 | } | |
c9317f21 TT |
9388 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
9389 | TYPE_NAME (sub_type) | |
9390 | = rust_fully_qualify (&objfile->objfile_obstack, | |
9391 | TYPE_NAME (type), variant_name); | |
9392 | } | |
9393 | } | |
9394 | } | |
9395 | ||
9396 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9397 | ||
9398 | static void | |
9399 | rust_union_quirks (struct dwarf2_cu *cu) | |
9400 | { | |
9401 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
9402 | for (type *type_ : cu->rust_unions) |
9403 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
9404 | /* We don't need this any more. */ |
9405 | cu->rust_unions.clear (); | |
c9317f21 TT |
9406 | } |
9407 | ||
95554aad TT |
9408 | /* Return the symtab for PER_CU. This works properly regardless of |
9409 | whether we're using the index or psymtabs. */ | |
9410 | ||
43f3e411 DE |
9411 | static struct compunit_symtab * |
9412 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 9413 | { |
ed2dc618 | 9414 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
9415 | ? per_cu->v.quick->compunit_symtab |
9416 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9417 | } |
9418 | ||
9419 | /* A helper function for computing the list of all symbol tables | |
9420 | included by PER_CU. */ | |
9421 | ||
9422 | static void | |
4c39bc03 | 9423 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9424 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9425 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9426 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9427 | { |
9428 | void **slot; | |
43f3e411 | 9429 | struct compunit_symtab *cust; |
95554aad TT |
9430 | |
9431 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9432 | if (*slot != NULL) | |
9433 | { | |
9434 | /* This inclusion and its children have been processed. */ | |
9435 | return; | |
9436 | } | |
9437 | ||
9438 | *slot = per_cu; | |
9439 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9440 | cust = get_compunit_symtab (per_cu); |
9441 | if (cust != NULL) | |
ec94af83 DE |
9442 | { |
9443 | /* If this is a type unit only add its symbol table if we haven't | |
9444 | seen it yet (type unit per_cu's can share symtabs). */ | |
9445 | if (per_cu->is_debug_types) | |
9446 | { | |
43f3e411 | 9447 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9448 | if (*slot == NULL) |
9449 | { | |
43f3e411 | 9450 | *slot = cust; |
4c39bc03 | 9451 | result->push_back (cust); |
43f3e411 DE |
9452 | if (cust->user == NULL) |
9453 | cust->user = immediate_parent; | |
ec94af83 DE |
9454 | } |
9455 | } | |
9456 | else | |
f9125b6c | 9457 | { |
4c39bc03 | 9458 | result->push_back (cust); |
43f3e411 DE |
9459 | if (cust->user == NULL) |
9460 | cust->user = immediate_parent; | |
f9125b6c | 9461 | } |
ec94af83 | 9462 | } |
95554aad | 9463 | |
ae640021 AB |
9464 | if (!per_cu->imported_symtabs_empty ()) |
9465 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9466 | { | |
9467 | recursively_compute_inclusions (result, all_children, | |
9468 | all_type_symtabs, ptr, cust); | |
9469 | } | |
95554aad TT |
9470 | } |
9471 | ||
43f3e411 | 9472 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9473 | PER_CU. */ |
9474 | ||
9475 | static void | |
43f3e411 | 9476 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9477 | { |
f4dc4d17 DE |
9478 | gdb_assert (! per_cu->is_debug_types); |
9479 | ||
ae640021 | 9480 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9481 | { |
ae640021 | 9482 | int len; |
4c39bc03 | 9483 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 9484 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9485 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9486 | |
9487 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9488 | if (cust == NULL) |
95554aad TT |
9489 | return; |
9490 | ||
9491 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9492 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9493 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9494 | NULL, xcalloc, xfree); | |
95554aad | 9495 | |
ae640021 | 9496 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 DE |
9497 | { |
9498 | recursively_compute_inclusions (&result_symtabs, all_children, | |
ae640021 | 9499 | all_type_symtabs, ptr, cust); |
ec94af83 | 9500 | } |
95554aad | 9501 | |
ec94af83 | 9502 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9503 | len = result_symtabs.size (); |
43f3e411 | 9504 | cust->includes |
ed2dc618 | 9505 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 9506 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9507 | memcpy (cust->includes, result_symtabs.data (), |
9508 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9509 | cust->includes[len] = NULL; |
95554aad | 9510 | |
95554aad | 9511 | htab_delete (all_children); |
ec94af83 | 9512 | htab_delete (all_type_symtabs); |
95554aad TT |
9513 | } |
9514 | } | |
9515 | ||
9516 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9517 | read. */ | |
9518 | ||
9519 | static void | |
ed2dc618 | 9520 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 9521 | { |
71b73764 | 9522 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
9523 | { |
9524 | if (! iter->is_debug_types) | |
43f3e411 | 9525 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9526 | } |
95554aad | 9527 | |
c5d0225d | 9528 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
9529 | } |
9530 | ||
9cdd5dbd | 9531 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9532 | already been loaded into memory. */ |
9533 | ||
9534 | static void | |
95554aad TT |
9535 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9536 | enum language pretend_language) | |
10b3939b | 9537 | { |
10b3939b | 9538 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
9539 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9540 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 9541 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9542 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9543 | struct compunit_symtab *cust; |
10b3939b | 9544 | CORE_ADDR baseaddr; |
4359dff1 | 9545 | struct block *static_block; |
3e29f34a | 9546 | CORE_ADDR addr; |
10b3939b | 9547 | |
b3b3bada | 9548 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9549 | |
c89b44cd TT |
9550 | /* Clear the list here in case something was left over. */ |
9551 | cu->method_list.clear (); | |
10b3939b | 9552 | |
95554aad TT |
9553 | cu->language = pretend_language; |
9554 | cu->language_defn = language_def (cu->language); | |
9555 | ||
c906108c | 9556 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9557 | process_die (cu->dies, cu); |
c906108c | 9558 | |
a766d390 DE |
9559 | /* For now fudge the Go package. */ |
9560 | if (cu->language == language_go) | |
9561 | fixup_go_packaging (cu); | |
9562 | ||
5f48f8f3 | 9563 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9564 | should be complete, and it should now be safe to compute all of the |
9565 | physnames. */ | |
9566 | compute_delayed_physnames (cu); | |
3da10d80 | 9567 | |
c9317f21 TT |
9568 | if (cu->language == language_rust) |
9569 | rust_union_quirks (cu); | |
9570 | ||
fae299cd DC |
9571 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9572 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9573 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9574 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9575 | |
3e29f34a | 9576 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9577 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9578 | |
9579 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9580 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9581 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9582 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9583 | this comp unit. */ | |
9584 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9585 | ||
c24bdb02 | 9586 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9587 | SECT_OFF_TEXT (objfile), |
9588 | 0); | |
c906108c | 9589 | |
43f3e411 | 9590 | if (cust != NULL) |
c906108c | 9591 | { |
df15bd07 | 9592 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9593 | |
8be455d7 JK |
9594 | /* Set symtab language to language from DW_AT_language. If the |
9595 | compilation is from a C file generated by language preprocessors, do | |
9596 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9597 | if (!(cu->language == language_c |
40e3ad0e | 9598 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9599 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9600 | |
9601 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9602 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9603 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9604 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9605 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9606 | |
9607 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9608 | needed, it would be wrong due to missing DW_AT_producer there. | |
9609 | ||
9610 | Still one can confuse GDB by using non-standard GCC compilation | |
9611 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9612 | */ |
ab260dad | 9613 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9614 | cust->locations_valid = 1; |
e0d00bc7 JK |
9615 | |
9616 | if (gcc_4_minor >= 5) | |
43f3e411 | 9617 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9618 | |
43f3e411 | 9619 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9620 | } |
9291a0cd TT |
9621 | |
9622 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9623 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9624 | else |
9625 | { | |
891813be | 9626 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9627 | pst->compunit_symtab = cust; |
6d94535f | 9628 | pst->readin = true; |
9291a0cd | 9629 | } |
c906108c | 9630 | |
95554aad | 9631 | /* Push it for inclusion processing later. */ |
c5d0225d | 9632 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
9633 | |
9634 | /* Not needed any more. */ | |
c24bdb02 | 9635 | cu->reset_builder (); |
f4dc4d17 | 9636 | } |
45cfd468 | 9637 | |
f4dc4d17 DE |
9638 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9639 | already been loaded into memory. */ | |
9640 | ||
9641 | static void | |
9642 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9643 | enum language pretend_language) | |
9644 | { | |
9645 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
9646 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9647 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 9648 | struct compunit_symtab *cust; |
0186c6a7 DE |
9649 | struct signatured_type *sig_type; |
9650 | ||
9651 | gdb_assert (per_cu->is_debug_types); | |
9652 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 9653 | |
c89b44cd TT |
9654 | /* Clear the list here in case something was left over. */ |
9655 | cu->method_list.clear (); | |
f4dc4d17 | 9656 | |
f4dc4d17 DE |
9657 | cu->language = pretend_language; |
9658 | cu->language_defn = language_def (cu->language); | |
9659 | ||
9660 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9661 | process_die (cu->dies, cu); | |
9662 | ||
9663 | /* For now fudge the Go package. */ | |
9664 | if (cu->language == language_go) | |
9665 | fixup_go_packaging (cu); | |
9666 | ||
5f48f8f3 | 9667 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9668 | should be complete, and it should now be safe to compute all of the |
9669 | physnames. */ | |
9670 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9671 | |
c9317f21 TT |
9672 | if (cu->language == language_rust) |
9673 | rust_union_quirks (cu); | |
9674 | ||
f4dc4d17 DE |
9675 | /* TUs share symbol tables. |
9676 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9677 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9678 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9679 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9680 | { |
c24bdb02 KS |
9681 | buildsym_compunit *builder = cu->get_builder (); |
9682 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 9683 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 9684 | |
43f3e411 | 9685 | if (cust != NULL) |
f4dc4d17 DE |
9686 | { |
9687 | /* Set symtab language to language from DW_AT_language. If the | |
9688 | compilation is from a C file generated by language preprocessors, | |
9689 | do not set the language if it was already deduced by | |
9690 | start_subfile. */ | |
43f3e411 DE |
9691 | if (!(cu->language == language_c |
9692 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9693 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9694 | } |
9695 | } | |
9696 | else | |
9697 | { | |
c24bdb02 | 9698 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 9699 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9700 | } |
9701 | ||
9702 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9703 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9704 | else |
9705 | { | |
891813be | 9706 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9707 | pst->compunit_symtab = cust; |
6d94535f | 9708 | pst->readin = true; |
45cfd468 | 9709 | } |
804d2729 TT |
9710 | |
9711 | /* Not needed any more. */ | |
c24bdb02 | 9712 | cu->reset_builder (); |
c906108c SS |
9713 | } |
9714 | ||
95554aad TT |
9715 | /* Process an imported unit DIE. */ |
9716 | ||
9717 | static void | |
9718 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9719 | { | |
9720 | struct attribute *attr; | |
9721 | ||
f4dc4d17 DE |
9722 | /* For now we don't handle imported units in type units. */ |
9723 | if (cu->per_cu->is_debug_types) | |
9724 | { | |
9725 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9726 | " supported in type units [in module %s]"), | |
518817b3 | 9727 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
9728 | } |
9729 | ||
95554aad TT |
9730 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9731 | if (attr != NULL) | |
9732 | { | |
9c541725 PA |
9733 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9734 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9735 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 9736 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 9737 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 9738 | |
69d751e3 | 9739 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 9740 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 9741 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 9742 | |
ae640021 | 9743 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9744 | } |
9745 | } | |
9746 | ||
4c8aa72d PA |
9747 | /* RAII object that represents a process_die scope: i.e., |
9748 | starts/finishes processing a DIE. */ | |
9749 | class process_die_scope | |
adde2bff | 9750 | { |
4c8aa72d PA |
9751 | public: |
9752 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9753 | : m_die (die), m_cu (cu) | |
9754 | { | |
9755 | /* We should only be processing DIEs not already in process. */ | |
9756 | gdb_assert (!m_die->in_process); | |
9757 | m_die->in_process = true; | |
9758 | } | |
8c3cb9fa | 9759 | |
4c8aa72d PA |
9760 | ~process_die_scope () |
9761 | { | |
9762 | m_die->in_process = false; | |
9763 | ||
9764 | /* If we're done processing the DIE for the CU that owns the line | |
9765 | header, we don't need the line header anymore. */ | |
9766 | if (m_cu->line_header_die_owner == m_die) | |
9767 | { | |
9768 | delete m_cu->line_header; | |
9769 | m_cu->line_header = NULL; | |
9770 | m_cu->line_header_die_owner = NULL; | |
9771 | } | |
9772 | } | |
9773 | ||
9774 | private: | |
9775 | die_info *m_die; | |
9776 | dwarf2_cu *m_cu; | |
9777 | }; | |
adde2bff | 9778 | |
c906108c SS |
9779 | /* Process a die and its children. */ |
9780 | ||
9781 | static void | |
e7c27a73 | 9782 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9783 | { |
4c8aa72d | 9784 | process_die_scope scope (die, cu); |
adde2bff | 9785 | |
c906108c SS |
9786 | switch (die->tag) |
9787 | { | |
9788 | case DW_TAG_padding: | |
9789 | break; | |
9790 | case DW_TAG_compile_unit: | |
95554aad | 9791 | case DW_TAG_partial_unit: |
e7c27a73 | 9792 | read_file_scope (die, cu); |
c906108c | 9793 | break; |
348e048f DE |
9794 | case DW_TAG_type_unit: |
9795 | read_type_unit_scope (die, cu); | |
9796 | break; | |
c906108c | 9797 | case DW_TAG_subprogram: |
0a4b0913 AB |
9798 | /* Nested subprograms in Fortran get a prefix. */ |
9799 | if (cu->language == language_fortran | |
9800 | && die->parent != NULL | |
9801 | && die->parent->tag == DW_TAG_subprogram) | |
9802 | cu->processing_has_namespace_info = true; | |
9803 | /* Fall through. */ | |
c906108c | 9804 | case DW_TAG_inlined_subroutine: |
edb3359d | 9805 | read_func_scope (die, cu); |
c906108c SS |
9806 | break; |
9807 | case DW_TAG_lexical_block: | |
14898363 L |
9808 | case DW_TAG_try_block: |
9809 | case DW_TAG_catch_block: | |
e7c27a73 | 9810 | read_lexical_block_scope (die, cu); |
c906108c | 9811 | break; |
216f72a1 | 9812 | case DW_TAG_call_site: |
96408a79 SA |
9813 | case DW_TAG_GNU_call_site: |
9814 | read_call_site_scope (die, cu); | |
9815 | break; | |
c906108c | 9816 | case DW_TAG_class_type: |
680b30c7 | 9817 | case DW_TAG_interface_type: |
c906108c SS |
9818 | case DW_TAG_structure_type: |
9819 | case DW_TAG_union_type: | |
134d01f1 | 9820 | process_structure_scope (die, cu); |
c906108c SS |
9821 | break; |
9822 | case DW_TAG_enumeration_type: | |
134d01f1 | 9823 | process_enumeration_scope (die, cu); |
c906108c | 9824 | break; |
134d01f1 | 9825 | |
f792889a DJ |
9826 | /* These dies have a type, but processing them does not create |
9827 | a symbol or recurse to process the children. Therefore we can | |
9828 | read them on-demand through read_type_die. */ | |
c906108c | 9829 | case DW_TAG_subroutine_type: |
72019c9c | 9830 | case DW_TAG_set_type: |
c906108c | 9831 | case DW_TAG_array_type: |
c906108c | 9832 | case DW_TAG_pointer_type: |
c906108c | 9833 | case DW_TAG_ptr_to_member_type: |
c906108c | 9834 | case DW_TAG_reference_type: |
4297a3f0 | 9835 | case DW_TAG_rvalue_reference_type: |
c906108c | 9836 | case DW_TAG_string_type: |
c906108c | 9837 | break; |
134d01f1 | 9838 | |
c906108c | 9839 | case DW_TAG_base_type: |
a02abb62 | 9840 | case DW_TAG_subrange_type: |
cb249c71 | 9841 | case DW_TAG_typedef: |
134d01f1 DJ |
9842 | /* Add a typedef symbol for the type definition, if it has a |
9843 | DW_AT_name. */ | |
f792889a | 9844 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9845 | break; |
c906108c | 9846 | case DW_TAG_common_block: |
e7c27a73 | 9847 | read_common_block (die, cu); |
c906108c SS |
9848 | break; |
9849 | case DW_TAG_common_inclusion: | |
9850 | break; | |
d9fa45fe | 9851 | case DW_TAG_namespace: |
9068261f | 9852 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9853 | read_namespace (die, cu); |
d9fa45fe | 9854 | break; |
5d7cb8df | 9855 | case DW_TAG_module: |
9068261f | 9856 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9857 | read_module (die, cu); |
9858 | break; | |
d9fa45fe | 9859 | case DW_TAG_imported_declaration: |
9068261f | 9860 | cu->processing_has_namespace_info = true; |
74921315 KS |
9861 | if (read_namespace_alias (die, cu)) |
9862 | break; | |
86a73007 TT |
9863 | /* The declaration is not a global namespace alias. */ |
9864 | /* Fall through. */ | |
d9fa45fe | 9865 | case DW_TAG_imported_module: |
9068261f | 9866 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9867 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9868 | || cu->language != language_fortran)) | |
b98664d3 | 9869 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9870 | dwarf_tag_name (die->tag)); |
9871 | read_import_statement (die, cu); | |
d9fa45fe | 9872 | break; |
95554aad TT |
9873 | |
9874 | case DW_TAG_imported_unit: | |
9875 | process_imported_unit_die (die, cu); | |
9876 | break; | |
9877 | ||
71a3c369 TT |
9878 | case DW_TAG_variable: |
9879 | read_variable (die, cu); | |
9880 | break; | |
9881 | ||
c906108c | 9882 | default: |
e7c27a73 | 9883 | new_symbol (die, NULL, cu); |
c906108c SS |
9884 | break; |
9885 | } | |
9886 | } | |
ca69b9e6 DE |
9887 | \f |
9888 | /* DWARF name computation. */ | |
c906108c | 9889 | |
94af9270 KS |
9890 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9891 | needs to have the name of the scope prepended to the name listed in the | |
9892 | die. */ | |
9893 | ||
9894 | static int | |
9895 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9896 | { | |
1c809c68 TT |
9897 | struct attribute *attr; |
9898 | ||
94af9270 KS |
9899 | switch (die->tag) |
9900 | { | |
9901 | case DW_TAG_namespace: | |
9902 | case DW_TAG_typedef: | |
9903 | case DW_TAG_class_type: | |
9904 | case DW_TAG_interface_type: | |
9905 | case DW_TAG_structure_type: | |
9906 | case DW_TAG_union_type: | |
9907 | case DW_TAG_enumeration_type: | |
9908 | case DW_TAG_enumerator: | |
9909 | case DW_TAG_subprogram: | |
08a76f8a | 9910 | case DW_TAG_inlined_subroutine: |
94af9270 | 9911 | case DW_TAG_member: |
74921315 | 9912 | case DW_TAG_imported_declaration: |
94af9270 KS |
9913 | return 1; |
9914 | ||
9915 | case DW_TAG_variable: | |
c2b0a229 | 9916 | case DW_TAG_constant: |
94af9270 KS |
9917 | /* We only need to prefix "globally" visible variables. These include |
9918 | any variable marked with DW_AT_external or any variable that | |
9919 | lives in a namespace. [Variables in anonymous namespaces | |
9920 | require prefixing, but they are not DW_AT_external.] */ | |
9921 | ||
9922 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9923 | { | |
9924 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9925 | |
94af9270 KS |
9926 | return die_needs_namespace (die_specification (die, &spec_cu), |
9927 | spec_cu); | |
9928 | } | |
9929 | ||
1c809c68 | 9930 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9931 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9932 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9933 | return 0; |
9934 | /* A variable in a lexical block of some kind does not need a | |
9935 | namespace, even though in C++ such variables may be external | |
9936 | and have a mangled name. */ | |
9937 | if (die->parent->tag == DW_TAG_lexical_block | |
9938 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9939 | || die->parent->tag == DW_TAG_catch_block |
9940 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9941 | return 0; |
9942 | return 1; | |
94af9270 KS |
9943 | |
9944 | default: | |
9945 | return 0; | |
9946 | } | |
9947 | } | |
9948 | ||
73b9be8b KS |
9949 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9950 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9951 | defined for the given DIE. */ | |
9952 | ||
9953 | static struct attribute * | |
9954 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9955 | { | |
9956 | struct attribute *attr; | |
9957 | ||
9958 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9959 | if (attr == NULL) | |
9960 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9961 | ||
9962 | return attr; | |
9963 | } | |
9964 | ||
9965 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9966 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9967 | defined for the given DIE. */ | |
9968 | ||
9969 | static const char * | |
9970 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9971 | { | |
9972 | const char *linkage_name; | |
9973 | ||
9974 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9975 | if (linkage_name == NULL) | |
9976 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9977 | ||
9978 | return linkage_name; | |
9979 | } | |
9980 | ||
94af9270 | 9981 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9982 | compute the physname for the object, which include a method's: |
9c37b5ae | 9983 | - formal parameters (C++), |
a766d390 | 9984 | - receiver type (Go), |
a766d390 DE |
9985 | |
9986 | The term "physname" is a bit confusing. | |
9987 | For C++, for example, it is the demangled name. | |
9988 | For Go, for example, it's the mangled name. | |
94af9270 | 9989 | |
af6b7be1 JB |
9990 | For Ada, return the DIE's linkage name rather than the fully qualified |
9991 | name. PHYSNAME is ignored.. | |
9992 | ||
94af9270 KS |
9993 | The result is allocated on the objfile_obstack and canonicalized. */ |
9994 | ||
9995 | static const char * | |
15d034d0 TT |
9996 | dwarf2_compute_name (const char *name, |
9997 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9998 | int physname) |
9999 | { | |
518817b3 | 10000 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10001 | |
94af9270 KS |
10002 | if (name == NULL) |
10003 | name = dwarf2_name (die, cu); | |
10004 | ||
2ee7123e DE |
10005 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10006 | but otherwise compute it by typename_concat inside GDB. | |
10007 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 10008 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 10009 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10010 | will set the demangled name to the result of dwarf2_full_name, and it is |
10011 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10012 | if (cu->language == language_ada |
10013 | || (cu->language == language_fortran && physname)) | |
10014 | { | |
10015 | /* For Ada unit, we prefer the linkage name over the name, as | |
10016 | the former contains the exported name, which the user expects | |
10017 | to be able to reference. Ideally, we want the user to be able | |
10018 | to reference this entity using either natural or linkage name, | |
10019 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10020 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10021 | |
2ee7123e DE |
10022 | if (linkage_name != NULL) |
10023 | return linkage_name; | |
f55ee35c JK |
10024 | } |
10025 | ||
94af9270 KS |
10026 | /* These are the only languages we know how to qualify names in. */ |
10027 | if (name != NULL | |
9c37b5ae | 10028 | && (cu->language == language_cplus |
c44af4eb TT |
10029 | || cu->language == language_fortran || cu->language == language_d |
10030 | || cu->language == language_rust)) | |
94af9270 KS |
10031 | { |
10032 | if (die_needs_namespace (die, cu)) | |
10033 | { | |
0d5cff50 | 10034 | const char *prefix; |
34a68019 | 10035 | const char *canonical_name = NULL; |
94af9270 | 10036 | |
d7e74731 PA |
10037 | string_file buf; |
10038 | ||
94af9270 | 10039 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10040 | if (*prefix != '\0') |
10041 | { | |
43816ebc TT |
10042 | gdb::unique_xmalloc_ptr<char> prefixed_name |
10043 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 10044 | |
43816ebc | 10045 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
10046 | } |
10047 | else | |
d7e74731 | 10048 | buf.puts (name); |
94af9270 | 10049 | |
98bfdba5 PA |
10050 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10051 | as children with DW_TAG_template_type_param or | |
10052 | DW_TAG_value_type_param. If the latter, add them to the name | |
10053 | here. If the name already has template parameters, then | |
10054 | skip this step; some versions of GCC emit both, and | |
10055 | it is more efficient to use the pre-computed name. | |
10056 | ||
10057 | Something to keep in mind about this process: it is very | |
10058 | unlikely, or in some cases downright impossible, to produce | |
10059 | something that will match the mangled name of a function. | |
10060 | If the definition of the function has the same debug info, | |
10061 | we should be able to match up with it anyway. But fallbacks | |
10062 | using the minimal symbol, for instance to find a method | |
10063 | implemented in a stripped copy of libstdc++, will not work. | |
10064 | If we do not have debug info for the definition, we will have to | |
10065 | match them up some other way. | |
10066 | ||
10067 | When we do name matching there is a related problem with function | |
10068 | templates; two instantiated function templates are allowed to | |
10069 | differ only by their return types, which we do not add here. */ | |
10070 | ||
10071 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10072 | { | |
10073 | struct attribute *attr; | |
10074 | struct die_info *child; | |
10075 | int first = 1; | |
10076 | ||
10077 | die->building_fullname = 1; | |
10078 | ||
10079 | for (child = die->child; child != NULL; child = child->sibling) | |
10080 | { | |
10081 | struct type *type; | |
12df843f | 10082 | LONGEST value; |
d521ce57 | 10083 | const gdb_byte *bytes; |
98bfdba5 PA |
10084 | struct dwarf2_locexpr_baton *baton; |
10085 | struct value *v; | |
10086 | ||
10087 | if (child->tag != DW_TAG_template_type_param | |
10088 | && child->tag != DW_TAG_template_value_param) | |
10089 | continue; | |
10090 | ||
10091 | if (first) | |
10092 | { | |
d7e74731 | 10093 | buf.puts ("<"); |
98bfdba5 PA |
10094 | first = 0; |
10095 | } | |
10096 | else | |
d7e74731 | 10097 | buf.puts (", "); |
98bfdba5 PA |
10098 | |
10099 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10100 | if (attr == NULL) | |
10101 | { | |
b98664d3 | 10102 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10103 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10104 | continue; |
10105 | } | |
10106 | type = die_type (child, cu); | |
10107 | ||
10108 | if (child->tag == DW_TAG_template_type_param) | |
10109 | { | |
c1ec8cea TT |
10110 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10111 | &type_print_raw_options); | |
98bfdba5 PA |
10112 | continue; |
10113 | } | |
10114 | ||
10115 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10116 | if (attr == NULL) | |
10117 | { | |
b98664d3 | 10118 | complaint (_("template parameter missing " |
3e43a32a | 10119 | "DW_AT_const_value")); |
d7e74731 | 10120 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10121 | continue; |
10122 | } | |
10123 | ||
10124 | dwarf2_const_value_attr (attr, type, name, | |
10125 | &cu->comp_unit_obstack, cu, | |
10126 | &value, &bytes, &baton); | |
10127 | ||
10128 | if (TYPE_NOSIGN (type)) | |
10129 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10130 | changed, this can use value_print instead. */ | |
d7e74731 | 10131 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10132 | else |
10133 | { | |
10134 | struct value_print_options opts; | |
10135 | ||
10136 | if (baton != NULL) | |
10137 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10138 | baton->data, | |
10139 | baton->size, | |
10140 | baton->per_cu); | |
10141 | else if (bytes != NULL) | |
10142 | { | |
10143 | v = allocate_value (type); | |
10144 | memcpy (value_contents_writeable (v), bytes, | |
10145 | TYPE_LENGTH (type)); | |
10146 | } | |
10147 | else | |
10148 | v = value_from_longest (type, value); | |
10149 | ||
3e43a32a MS |
10150 | /* Specify decimal so that we do not depend on |
10151 | the radix. */ | |
98bfdba5 PA |
10152 | get_formatted_print_options (&opts, 'd'); |
10153 | opts.raw = 1; | |
d7e74731 | 10154 | value_print (v, &buf, &opts); |
98bfdba5 | 10155 | release_value (v); |
98bfdba5 PA |
10156 | } |
10157 | } | |
10158 | ||
10159 | die->building_fullname = 0; | |
10160 | ||
10161 | if (!first) | |
10162 | { | |
10163 | /* Close the argument list, with a space if necessary | |
10164 | (nested templates). */ | |
d7e74731 PA |
10165 | if (!buf.empty () && buf.string ().back () == '>') |
10166 | buf.puts (" >"); | |
98bfdba5 | 10167 | else |
d7e74731 | 10168 | buf.puts (">"); |
98bfdba5 PA |
10169 | } |
10170 | } | |
10171 | ||
9c37b5ae | 10172 | /* For C++ methods, append formal parameter type |
94af9270 | 10173 | information, if PHYSNAME. */ |
6e70227d | 10174 | |
94af9270 | 10175 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10176 | && cu->language == language_cplus) |
94af9270 KS |
10177 | { |
10178 | struct type *type = read_type_die (die, cu); | |
10179 | ||
d7e74731 | 10180 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10181 | &type_print_raw_options); |
94af9270 | 10182 | |
9c37b5ae | 10183 | if (cu->language == language_cplus) |
94af9270 | 10184 | { |
60430eff DJ |
10185 | /* Assume that an artificial first parameter is |
10186 | "this", but do not crash if it is not. RealView | |
10187 | marks unnamed (and thus unused) parameters as | |
10188 | artificial; there is no way to differentiate | |
10189 | the two cases. */ | |
94af9270 KS |
10190 | if (TYPE_NFIELDS (type) > 0 |
10191 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 10192 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
10193 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10194 | 0)))) | |
d7e74731 | 10195 | buf.puts (" const"); |
94af9270 KS |
10196 | } |
10197 | } | |
10198 | ||
d7e74731 | 10199 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10200 | |
10201 | if (cu->language == language_cplus) | |
34a68019 | 10202 | canonical_name |
322a8516 | 10203 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
10204 | &objfile->per_bfd->storage_obstack); |
10205 | ||
10206 | /* If we only computed INTERMEDIATE_NAME, or if | |
10207 | INTERMEDIATE_NAME is already canonical, then we need to | |
10208 | copy it to the appropriate obstack. */ | |
322a8516 | 10209 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
efba19b0 TT |
10210 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, |
10211 | intermediate_name); | |
34a68019 TT |
10212 | else |
10213 | name = canonical_name; | |
94af9270 KS |
10214 | } |
10215 | } | |
10216 | ||
10217 | return name; | |
10218 | } | |
10219 | ||
0114d602 DJ |
10220 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10221 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10222 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10223 | not have a name. NAME may either be from a previous call to |
10224 | dwarf2_name or NULL. | |
10225 | ||
9c37b5ae | 10226 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10227 | |
10228 | static const char * | |
15d034d0 | 10229 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10230 | { |
94af9270 KS |
10231 | return dwarf2_compute_name (name, die, cu, 0); |
10232 | } | |
0114d602 | 10233 | |
94af9270 KS |
10234 | /* Construct a physname for the given DIE in CU. NAME may either be |
10235 | from a previous call to dwarf2_name or NULL. The result will be | |
10236 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10237 | name. | |
0114d602 | 10238 | |
9c37b5ae | 10239 | The output string will be canonicalized (if C++). */ |
0114d602 | 10240 | |
94af9270 | 10241 | static const char * |
15d034d0 | 10242 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10243 | { |
518817b3 | 10244 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 10245 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10246 | int need_copy = 1; |
10247 | ||
10248 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10249 | on its own. */ | |
10250 | if (!die_needs_namespace (die, cu)) | |
10251 | return dwarf2_compute_name (name, die, cu, 1); | |
10252 | ||
73b9be8b | 10253 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 10254 | |
e98c9e7c TT |
10255 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
10256 | See https://github.com/rust-lang/rust/issues/32925. */ | |
10257 | if (cu->language == language_rust && mangled != NULL | |
10258 | && strchr (mangled, '{') != NULL) | |
10259 | mangled = NULL; | |
10260 | ||
900e11f9 JK |
10261 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
10262 | has computed. */ | |
791afaa2 | 10263 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10264 | if (mangled != NULL) |
900e11f9 | 10265 | { |
900e11f9 | 10266 | |
59cc4834 JB |
10267 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
10268 | { | |
10269 | /* Do nothing (do not demangle the symbol name). */ | |
10270 | } | |
10271 | else if (cu->language == language_go) | |
a766d390 | 10272 | { |
5e2db402 TT |
10273 | /* This is a lie, but we already lie to the caller new_symbol. |
10274 | new_symbol assumes we return the mangled name. | |
a766d390 | 10275 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
10276 | } |
10277 | else | |
10278 | { | |
0eb876f5 JB |
10279 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10280 | their return type. It is easier for GDB users to search | |
10281 | for such functions as `name(params)' than `long name(params)'. | |
10282 | In such case the minimal symbol names do not match the full | |
10283 | symbol names but for template functions there is never a need | |
10284 | to look up their definition from their declaration so | |
10285 | the only disadvantage remains the minimal symbol variant | |
10286 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10287 | demangled.reset (gdb_demangle (mangled, |
10288 | (DMGL_PARAMS | DMGL_ANSI | |
10289 | | DMGL_RET_DROP))); | |
a766d390 | 10290 | } |
900e11f9 | 10291 | if (demangled) |
791afaa2 | 10292 | canon = demangled.get (); |
900e11f9 JK |
10293 | else |
10294 | { | |
10295 | canon = mangled; | |
10296 | need_copy = 0; | |
10297 | } | |
10298 | } | |
10299 | ||
10300 | if (canon == NULL || check_physname) | |
10301 | { | |
10302 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10303 | ||
10304 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10305 | { | |
10306 | /* It may not mean a bug in GDB. The compiler could also | |
10307 | compute DW_AT_linkage_name incorrectly. But in such case | |
10308 | GDB would need to be bug-to-bug compatible. */ | |
10309 | ||
b98664d3 | 10310 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10311 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10312 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10313 | objfile_name (objfile)); |
900e11f9 JK |
10314 | |
10315 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10316 | is available here - over computed PHYSNAME. It is safer | |
10317 | against both buggy GDB and buggy compilers. */ | |
10318 | ||
10319 | retval = canon; | |
10320 | } | |
10321 | else | |
10322 | { | |
10323 | retval = physname; | |
10324 | need_copy = 0; | |
10325 | } | |
10326 | } | |
10327 | else | |
10328 | retval = canon; | |
10329 | ||
10330 | if (need_copy) | |
021887d8 | 10331 | retval = obstack_strdup (&objfile->per_bfd->storage_obstack, retval); |
900e11f9 | 10332 | |
900e11f9 | 10333 | return retval; |
0114d602 DJ |
10334 | } |
10335 | ||
74921315 KS |
10336 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10337 | a new symbol for it. | |
10338 | ||
10339 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10340 | ||
10341 | static int | |
10342 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10343 | { | |
10344 | struct attribute *attr; | |
10345 | ||
10346 | /* If the die does not have a name, this is not a namespace | |
10347 | alias. */ | |
10348 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10349 | if (attr != NULL) | |
10350 | { | |
10351 | int num; | |
10352 | struct die_info *d = die; | |
10353 | struct dwarf2_cu *imported_cu = cu; | |
10354 | ||
10355 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10356 | keep inspecting DIEs until we hit the underlying import. */ | |
10357 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10358 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10359 | { | |
10360 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10361 | if (attr == NULL) | |
10362 | break; | |
10363 | ||
10364 | d = follow_die_ref (d, attr, &imported_cu); | |
10365 | if (d->tag != DW_TAG_imported_declaration) | |
10366 | break; | |
10367 | } | |
10368 | ||
10369 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10370 | { | |
b98664d3 | 10371 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10372 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10373 | return 0; |
10374 | } | |
10375 | ||
10376 | if (attr != NULL) | |
10377 | { | |
10378 | struct type *type; | |
9c541725 | 10379 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 10380 | |
9c541725 | 10381 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
10382 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
10383 | { | |
10384 | /* This declaration is a global namespace alias. Add | |
10385 | a symbol for it whose type is the aliased namespace. */ | |
10386 | new_symbol (die, type, cu); | |
10387 | return 1; | |
10388 | } | |
10389 | } | |
10390 | } | |
10391 | ||
10392 | return 0; | |
10393 | } | |
10394 | ||
22cee43f | 10395 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10396 | current context for CU. |
22cee43f PMR |
10397 | |
10398 | For Ada, imported declarations can materialize renamings, which *may* be | |
10399 | global. However it is impossible (for now?) in DWARF to distinguish | |
10400 | "external" imported declarations and "static" ones. As all imported | |
10401 | declarations seem to be static in all other languages, make them all CU-wide | |
10402 | global only in Ada. */ | |
10403 | ||
10404 | static struct using_direct ** | |
804d2729 | 10405 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10406 | { |
c24bdb02 KS |
10407 | if (cu->language == language_ada |
10408 | && cu->get_builder ()->outermost_context_p ()) | |
10409 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10410 | else |
c24bdb02 | 10411 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10412 | } |
10413 | ||
27aa8d6a SW |
10414 | /* Read the import statement specified by the given die and record it. */ |
10415 | ||
10416 | static void | |
10417 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10418 | { | |
518817b3 | 10419 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 10420 | struct attribute *import_attr; |
32019081 | 10421 | struct die_info *imported_die, *child_die; |
de4affc9 | 10422 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10423 | const char *imported_name; |
794684b6 | 10424 | const char *imported_name_prefix; |
13387711 SW |
10425 | const char *canonical_name; |
10426 | const char *import_alias; | |
10427 | const char *imported_declaration = NULL; | |
794684b6 | 10428 | const char *import_prefix; |
eb1e02fd | 10429 | std::vector<const char *> excludes; |
13387711 | 10430 | |
27aa8d6a SW |
10431 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10432 | if (import_attr == NULL) | |
10433 | { | |
b98664d3 | 10434 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10435 | dwarf_tag_name (die->tag)); |
10436 | return; | |
10437 | } | |
10438 | ||
de4affc9 CC |
10439 | imported_cu = cu; |
10440 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10441 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10442 | if (imported_name == NULL) |
10443 | { | |
10444 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10445 | ||
10446 | The import in the following code: | |
10447 | namespace A | |
10448 | { | |
10449 | typedef int B; | |
10450 | } | |
10451 | ||
10452 | int main () | |
10453 | { | |
10454 | using A::B; | |
10455 | B b; | |
10456 | return b; | |
10457 | } | |
10458 | ||
10459 | ... | |
10460 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10461 | <52> DW_AT_decl_file : 1 | |
10462 | <53> DW_AT_decl_line : 6 | |
10463 | <54> DW_AT_import : <0x75> | |
10464 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10465 | <59> DW_AT_name : B | |
10466 | <5b> DW_AT_decl_file : 1 | |
10467 | <5c> DW_AT_decl_line : 2 | |
10468 | <5d> DW_AT_type : <0x6e> | |
10469 | ... | |
10470 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10471 | <76> DW_AT_byte_size : 4 | |
10472 | <77> DW_AT_encoding : 5 (signed) | |
10473 | ||
10474 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10475 | This case will be ignored until the gcc bug is fixed. */ | |
10476 | return; | |
10477 | } | |
10478 | ||
82856980 SW |
10479 | /* Figure out the local name after import. */ |
10480 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10481 | |
794684b6 SW |
10482 | /* Figure out where the statement is being imported to. */ |
10483 | import_prefix = determine_prefix (die, cu); | |
10484 | ||
10485 | /* Figure out what the scope of the imported die is and prepend it | |
10486 | to the name of the imported die. */ | |
de4affc9 | 10487 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10488 | |
f55ee35c JK |
10489 | if (imported_die->tag != DW_TAG_namespace |
10490 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10491 | { |
13387711 SW |
10492 | imported_declaration = imported_name; |
10493 | canonical_name = imported_name_prefix; | |
794684b6 | 10494 | } |
13387711 | 10495 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10496 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10497 | imported_name_prefix, |
10498 | (cu->language == language_d ? "." : "::"), | |
10499 | imported_name, (char *) NULL); | |
13387711 SW |
10500 | else |
10501 | canonical_name = imported_name; | |
794684b6 | 10502 | |
32019081 JK |
10503 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10504 | for (child_die = die->child; child_die && child_die->tag; | |
10505 | child_die = sibling_die (child_die)) | |
10506 | { | |
10507 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10508 | represented by an imported module entry with an import attribute | |
10509 | referring to the module and owned entries corresponding to those | |
10510 | entities that are renamed as part of being imported. */ | |
10511 | ||
10512 | if (child_die->tag != DW_TAG_imported_declaration) | |
10513 | { | |
b98664d3 | 10514 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10515 | "- DIE at %s [in module %s]"), |
10516 | sect_offset_str (child_die->sect_off), | |
10517 | objfile_name (objfile)); | |
32019081 JK |
10518 | continue; |
10519 | } | |
10520 | ||
10521 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10522 | if (import_attr == NULL) | |
10523 | { | |
b98664d3 | 10524 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10525 | dwarf_tag_name (child_die->tag)); |
10526 | continue; | |
10527 | } | |
10528 | ||
10529 | imported_cu = cu; | |
10530 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10531 | &imported_cu); | |
10532 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10533 | if (imported_name == NULL) | |
10534 | { | |
b98664d3 | 10535 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10536 | "imported name - DIE at %s [in module %s]"), |
10537 | sect_offset_str (child_die->sect_off), | |
10538 | objfile_name (objfile)); | |
32019081 JK |
10539 | continue; |
10540 | } | |
10541 | ||
eb1e02fd | 10542 | excludes.push_back (imported_name); |
32019081 JK |
10543 | |
10544 | process_die (child_die, cu); | |
10545 | } | |
10546 | ||
804d2729 | 10547 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10548 | import_prefix, |
10549 | canonical_name, | |
10550 | import_alias, | |
10551 | imported_declaration, | |
10552 | excludes, | |
10553 | 0, | |
10554 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10555 | } |
10556 | ||
5230b05a WT |
10557 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10558 | types, but gives them a size of zero. Starting with version 14, | |
10559 | ICC is compatible with GCC. */ | |
10560 | ||
9068261f | 10561 | static bool |
5230b05a WT |
10562 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10563 | { | |
10564 | if (!cu->checked_producer) | |
10565 | check_producer (cu); | |
10566 | ||
10567 | return cu->producer_is_icc_lt_14; | |
10568 | } | |
10569 | ||
eb77c9df AB |
10570 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10571 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10572 | which says that void functions should not have a DW_AT_type. */ | |
10573 | ||
10574 | static bool | |
10575 | producer_is_icc (struct dwarf2_cu *cu) | |
10576 | { | |
10577 | if (!cu->checked_producer) | |
10578 | check_producer (cu); | |
10579 | ||
10580 | return cu->producer_is_icc; | |
10581 | } | |
10582 | ||
1b80a9fa JK |
10583 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10584 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10585 | this, it was first present in GCC release 4.3.0. */ | |
10586 | ||
9068261f | 10587 | static bool |
1b80a9fa JK |
10588 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10589 | { | |
10590 | if (!cu->checked_producer) | |
10591 | check_producer (cu); | |
10592 | ||
10593 | return cu->producer_is_gcc_lt_4_3; | |
10594 | } | |
10595 | ||
d721ba37 PA |
10596 | static file_and_directory |
10597 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10598 | { |
d721ba37 PA |
10599 | file_and_directory res; |
10600 | ||
9291a0cd TT |
10601 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10602 | is not a source language identifier. */ | |
d721ba37 PA |
10603 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10604 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10605 | |
d721ba37 PA |
10606 | if (res.comp_dir == NULL |
10607 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10608 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10609 | { |
d721ba37 PA |
10610 | res.comp_dir_storage = ldirname (res.name); |
10611 | if (!res.comp_dir_storage.empty ()) | |
10612 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10613 | } |
d721ba37 | 10614 | if (res.comp_dir != NULL) |
9291a0cd TT |
10615 | { |
10616 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10617 | directory, get rid of it. */ | |
d721ba37 | 10618 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10619 | |
d721ba37 PA |
10620 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10621 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10622 | } |
10623 | ||
d721ba37 PA |
10624 | if (res.name == NULL) |
10625 | res.name = "<unknown>"; | |
10626 | ||
10627 | return res; | |
9291a0cd TT |
10628 | } |
10629 | ||
f4dc4d17 DE |
10630 | /* Handle DW_AT_stmt_list for a compilation unit. |
10631 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10632 | COMP_DIR is the compilation directory. LOWPC is passed to |
10633 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10634 | |
10635 | static void | |
10636 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10637 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10638 | { |
518817b3 SM |
10639 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10640 | = cu->per_cu->dwarf2_per_objfile; | |
2ab95328 | 10641 | struct attribute *attr; |
527f3840 JK |
10642 | struct line_header line_header_local; |
10643 | hashval_t line_header_local_hash; | |
527f3840 JK |
10644 | void **slot; |
10645 | int decode_mapping; | |
2ab95328 | 10646 | |
f4dc4d17 DE |
10647 | gdb_assert (! cu->per_cu->is_debug_types); |
10648 | ||
2ab95328 | 10649 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10650 | if (attr == NULL) |
10651 | return; | |
10652 | ||
9c541725 | 10653 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10654 | |
10655 | /* The line header hash table is only created if needed (it exists to | |
10656 | prevent redundant reading of the line table for partial_units). | |
10657 | If we're given a partial_unit, we'll need it. If we're given a | |
10658 | compile_unit, then use the line header hash table if it's already | |
10659 | created, but don't create one just yet. */ | |
10660 | ||
10661 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10662 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10663 | { |
527f3840 | 10664 | dwarf2_per_objfile->line_header_hash |
d15acc42 TT |
10665 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10666 | line_header_eq_voidp, | |
10667 | free_line_header_voidp, | |
10668 | xcalloc, xfree)); | |
527f3840 | 10669 | } |
2ab95328 | 10670 | |
9c541725 | 10671 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10672 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10673 | line_header_local_hash = line_header_hash (&line_header_local); | |
10674 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10675 | { | |
d15acc42 | 10676 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10677 | &line_header_local, |
10678 | line_header_local_hash, NO_INSERT); | |
10679 | ||
10680 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10681 | is not present in *SLOT (since if there is something in *SLOT then | |
10682 | it will be for a partial_unit). */ | |
10683 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10684 | { |
527f3840 | 10685 | gdb_assert (*slot != NULL); |
9a3c8263 | 10686 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10687 | return; |
dee91e82 | 10688 | } |
2ab95328 | 10689 | } |
527f3840 JK |
10690 | |
10691 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10692 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10693 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10694 | if (lh == NULL) | |
527f3840 | 10695 | return; |
4c8aa72d PA |
10696 | |
10697 | cu->line_header = lh.release (); | |
10698 | cu->line_header_die_owner = die; | |
527f3840 JK |
10699 | |
10700 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10701 | slot = NULL; | |
10702 | else | |
10703 | { | |
d15acc42 | 10704 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10705 | &line_header_local, |
10706 | line_header_local_hash, INSERT); | |
10707 | gdb_assert (slot != NULL); | |
10708 | } | |
10709 | if (slot != NULL && *slot == NULL) | |
10710 | { | |
10711 | /* This newly decoded line number information unit will be owned | |
10712 | by line_header_hash hash table. */ | |
10713 | *slot = cu->line_header; | |
4c8aa72d | 10714 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10715 | } |
10716 | else | |
10717 | { | |
10718 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10719 | may be already used by multiple CUs. Create only temporary decoded | |
10720 | line_header for this CU - it may happen at most once for each line | |
10721 | number information unit. And if we're not using line_header_hash | |
10722 | then this is what we want as well. */ | |
10723 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10724 | } |
10725 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10726 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10727 | decode_mapping); | |
fff8551c | 10728 | |
2ab95328 TT |
10729 | } |
10730 | ||
95554aad | 10731 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10732 | |
c906108c | 10733 | static void |
e7c27a73 | 10734 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10735 | { |
518817b3 SM |
10736 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10737 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 10738 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10739 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10740 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10741 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10742 | struct attribute *attr; | |
c906108c | 10743 | struct die_info *child_die; |
e142c38c | 10744 | CORE_ADDR baseaddr; |
6e70227d | 10745 | |
380618d6 | 10746 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10747 | baseaddr = objfile->text_section_offset (); |
c906108c | 10748 | |
fae299cd | 10749 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10750 | |
10751 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10752 | from finish_block. */ | |
2acceee2 | 10753 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10754 | lowpc = highpc; |
3e29f34a | 10755 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10756 | |
d721ba37 | 10757 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10758 | |
f4b8a18d KW |
10759 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10760 | standardised yet. As a workaround for the language detection we fall | |
10761 | back to the DW_AT_producer string. */ | |
10762 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10763 | cu->language = language_opencl; | |
10764 | ||
3019eac3 DE |
10765 | /* Similar hack for Go. */ |
10766 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10767 | set_cu_language (DW_LANG_Go, cu); | |
10768 | ||
c24bdb02 | 10769 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10770 | |
10771 | /* Decode line number information if present. We do this before | |
10772 | processing child DIEs, so that the line header table is available | |
10773 | for DW_AT_decl_file. */ | |
d721ba37 | 10774 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10775 | |
10776 | /* Process all dies in compilation unit. */ | |
10777 | if (die->child != NULL) | |
10778 | { | |
10779 | child_die = die->child; | |
10780 | while (child_die && child_die->tag) | |
10781 | { | |
10782 | process_die (child_die, cu); | |
10783 | child_die = sibling_die (child_die); | |
10784 | } | |
10785 | } | |
10786 | ||
10787 | /* Decode macro information, if present. Dwarf 2 macro information | |
10788 | refers to information in the line number info statement program | |
10789 | header, so we can only read it if we've read the header | |
10790 | successfully. */ | |
0af92d60 JK |
10791 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10792 | if (attr == NULL) | |
10793 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10794 | if (attr && cu->line_header) |
10795 | { | |
10796 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10797 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10798 | |
43f3e411 | 10799 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10800 | } |
10801 | else | |
10802 | { | |
10803 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10804 | if (attr && cu->line_header) | |
10805 | { | |
10806 | unsigned int macro_offset = DW_UNSND (attr); | |
10807 | ||
43f3e411 | 10808 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10809 | } |
10810 | } | |
3019eac3 DE |
10811 | } |
10812 | ||
c24bdb02 KS |
10813 | void |
10814 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10815 | { |
f4dc4d17 DE |
10816 | struct type_unit_group *tu_group; |
10817 | int first_time; | |
3019eac3 | 10818 | struct attribute *attr; |
9c541725 | 10819 | unsigned int i; |
0186c6a7 | 10820 | struct signatured_type *sig_type; |
3019eac3 | 10821 | |
f4dc4d17 | 10822 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10823 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10824 | |
c24bdb02 | 10825 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10826 | |
f4dc4d17 | 10827 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10828 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10829 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10830 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10831 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10832 | |
10833 | /* If we've already processed this stmt_list there's no real need to | |
10834 | do it again, we could fake it and just recreate the part we need | |
10835 | (file name,index -> symtab mapping). If data shows this optimization | |
10836 | is useful we can do it then. */ | |
43f3e411 | 10837 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10838 | |
10839 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10840 | debug info. */ | |
fff8551c | 10841 | line_header_up lh; |
f4dc4d17 | 10842 | if (attr != NULL) |
3019eac3 | 10843 | { |
9c541725 | 10844 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 10845 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10846 | } |
10847 | if (lh == NULL) | |
10848 | { | |
10849 | if (first_time) | |
c24bdb02 | 10850 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10851 | else |
10852 | { | |
10853 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 10854 | gdb_assert (m_builder == nullptr); |
804d2729 | 10855 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10856 | m_builder.reset (new struct buildsym_compunit |
10857 | (COMPUNIT_OBJFILE (cust), "", | |
10858 | COMPUNIT_DIRNAME (cust), | |
10859 | compunit_language (cust), | |
10860 | 0, cust)); | |
f4dc4d17 | 10861 | } |
f4dc4d17 | 10862 | return; |
3019eac3 DE |
10863 | } |
10864 | ||
c24bdb02 KS |
10865 | line_header = lh.release (); |
10866 | line_header_die_owner = die; | |
3019eac3 | 10867 | |
f4dc4d17 DE |
10868 | if (first_time) |
10869 | { | |
c24bdb02 | 10870 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10871 | |
1fd60fc0 DE |
10872 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10873 | still initializing it, and our caller (a few levels up) | |
10874 | process_full_type_unit still needs to know if this is the first | |
10875 | time. */ | |
10876 | ||
4ac93832 TT |
10877 | tu_group->symtabs |
10878 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, | |
10879 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10880 | |
7ba99d21 AT |
10881 | auto &file_names = line_header->file_names (); |
10882 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10883 | { |
7ba99d21 | 10884 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10885 | dwarf2_start_subfile (this, fe.name, |
10886 | fe.include_dir (line_header)); | |
10887 | buildsym_compunit *b = get_builder (); | |
10888 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10889 | { |
4c8aa72d PA |
10890 | /* NOTE: start_subfile will recognize when it's been |
10891 | passed a file it has already seen. So we can't | |
10892 | assume there's a simple mapping from | |
10893 | cu->line_header->file_names to subfiles, plus | |
10894 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
10895 | b->get_current_subfile ()->symtab |
10896 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
10897 | } |
10898 | ||
c24bdb02 | 10899 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 10900 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
10901 | } |
10902 | } | |
10903 | else | |
3019eac3 | 10904 | { |
c24bdb02 | 10905 | gdb_assert (m_builder == nullptr); |
804d2729 | 10906 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10907 | m_builder.reset (new struct buildsym_compunit |
10908 | (COMPUNIT_OBJFILE (cust), "", | |
10909 | COMPUNIT_DIRNAME (cust), | |
10910 | compunit_language (cust), | |
10911 | 0, cust)); | |
f4dc4d17 | 10912 | |
7ba99d21 AT |
10913 | auto &file_names = line_header->file_names (); |
10914 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10915 | { |
7ba99d21 | 10916 | file_entry &fe = file_names[i]; |
4c8aa72d | 10917 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10918 | } |
3019eac3 DE |
10919 | } |
10920 | ||
f4dc4d17 DE |
10921 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10922 | so they don't have a "real" (so to speak) symtab anyway. | |
10923 | There is later code that will assign the main symtab to all symbols | |
10924 | that don't have one. We need to handle the case of a symbol with a | |
10925 | missing symtab (DW_AT_decl_file) anyway. */ | |
10926 | } | |
3019eac3 | 10927 | |
f4dc4d17 DE |
10928 | /* Process DW_TAG_type_unit. |
10929 | For TUs we want to skip the first top level sibling if it's not the | |
10930 | actual type being defined by this TU. In this case the first top | |
10931 | level sibling is there to provide context only. */ | |
3019eac3 | 10932 | |
f4dc4d17 DE |
10933 | static void |
10934 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10935 | { | |
10936 | struct die_info *child_die; | |
3019eac3 | 10937 | |
f4dc4d17 DE |
10938 | prepare_one_comp_unit (cu, die, language_minimal); |
10939 | ||
10940 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10941 | We do this before processing child DIEs, so that the line header table | |
10942 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 10943 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
10944 | |
10945 | if (die->child != NULL) | |
10946 | { | |
10947 | child_die = die->child; | |
10948 | while (child_die && child_die->tag) | |
10949 | { | |
10950 | process_die (child_die, cu); | |
10951 | child_die = sibling_die (child_die); | |
10952 | } | |
10953 | } | |
3019eac3 DE |
10954 | } |
10955 | \f | |
80626a55 DE |
10956 | /* DWO/DWP files. |
10957 | ||
10958 | http://gcc.gnu.org/wiki/DebugFission | |
10959 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10960 | ||
10961 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10962 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10963 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10964 | |
10965 | static hashval_t | |
10966 | hash_dwo_file (const void *item) | |
10967 | { | |
9a3c8263 | 10968 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10969 | hashval_t hash; |
3019eac3 | 10970 | |
a2ce51a0 DE |
10971 | hash = htab_hash_string (dwo_file->dwo_name); |
10972 | if (dwo_file->comp_dir != NULL) | |
10973 | hash += htab_hash_string (dwo_file->comp_dir); | |
10974 | return hash; | |
3019eac3 DE |
10975 | } |
10976 | ||
10977 | static int | |
10978 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10979 | { | |
9a3c8263 SM |
10980 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10981 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10982 | |
a2ce51a0 DE |
10983 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10984 | return 0; | |
10985 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10986 | return lhs->comp_dir == rhs->comp_dir; | |
10987 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10988 | } |
10989 | ||
10990 | /* Allocate a hash table for DWO files. */ | |
10991 | ||
51ac9db5 | 10992 | static htab_up |
298e9637 | 10993 | allocate_dwo_file_hash_table () |
3019eac3 | 10994 | { |
51ac9db5 SM |
10995 | auto delete_dwo_file = [] (void *item) |
10996 | { | |
10997 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
10998 | ||
10999 | delete dwo_file; | |
11000 | }; | |
11001 | ||
bc68fb19 TT |
11002 | return htab_up (htab_create_alloc (41, |
11003 | hash_dwo_file, | |
11004 | eq_dwo_file, | |
11005 | delete_dwo_file, | |
11006 | xcalloc, xfree)); | |
3019eac3 DE |
11007 | } |
11008 | ||
80626a55 DE |
11009 | /* Lookup DWO file DWO_NAME. */ |
11010 | ||
11011 | static void ** | |
ed2dc618 SM |
11012 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11013 | const char *dwo_name, | |
11014 | const char *comp_dir) | |
80626a55 DE |
11015 | { |
11016 | struct dwo_file find_entry; | |
11017 | void **slot; | |
11018 | ||
11019 | if (dwarf2_per_objfile->dwo_files == NULL) | |
298e9637 | 11020 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); |
80626a55 | 11021 | |
0ac5b59e DE |
11022 | find_entry.dwo_name = dwo_name; |
11023 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11024 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11025 | INSERT); | |
80626a55 DE |
11026 | |
11027 | return slot; | |
11028 | } | |
11029 | ||
3019eac3 DE |
11030 | static hashval_t |
11031 | hash_dwo_unit (const void *item) | |
11032 | { | |
9a3c8263 | 11033 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11034 | |
11035 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11036 | return dwo_unit->signature; | |
11037 | } | |
11038 | ||
11039 | static int | |
11040 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11041 | { | |
9a3c8263 SM |
11042 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11043 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11044 | |
11045 | /* The signature is assumed to be unique within the DWO file. | |
11046 | So while object file CU dwo_id's always have the value zero, | |
11047 | that's OK, assuming each object file DWO file has only one CU, | |
11048 | and that's the rule for now. */ | |
11049 | return lhs->signature == rhs->signature; | |
11050 | } | |
11051 | ||
11052 | /* Allocate a hash table for DWO CUs,TUs. | |
11053 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11054 | ||
b0b6a987 | 11055 | static htab_up |
298e9637 | 11056 | allocate_dwo_unit_table () |
3019eac3 DE |
11057 | { |
11058 | /* Start out with a pretty small number. | |
11059 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
11060 | return htab_up (htab_create_alloc (3, |
11061 | hash_dwo_unit, | |
11062 | eq_dwo_unit, | |
11063 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
11064 | } |
11065 | ||
19c3d4c9 | 11066 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11067 | |
11068 | static void | |
19c3d4c9 DE |
11069 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11070 | const gdb_byte *info_ptr, | |
11071 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
11072 | struct dwo_file *dwo_file, |
11073 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
11074 | { |
11075 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11076 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11077 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 11078 | |
a084a2a6 AT |
11079 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11080 | if (!signature.has_value ()) | |
3019eac3 | 11081 | { |
b98664d3 | 11082 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11083 | " its dwo_id [in module %s]"), |
9d8780f0 | 11084 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11085 | return; |
11086 | } | |
11087 | ||
3019eac3 | 11088 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11089 | dwo_unit->signature = *signature; |
8a0459fd | 11090 | dwo_unit->section = section; |
9c541725 | 11091 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11092 | dwo_unit->length = cu->per_cu->length; |
11093 | ||
b4f54984 | 11094 | if (dwarf_read_debug) |
9d8780f0 SM |
11095 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11096 | sect_offset_str (sect_off), | |
9c541725 | 11097 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11098 | } |
11099 | ||
33c5cd75 | 11100 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11101 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11102 | |
33c5cd75 | 11103 | static void |
ed2dc618 | 11104 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e | 11105 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 11106 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 DE |
11107 | { |
11108 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11109 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11110 | |
96b79293 | 11111 | section.read (objfile); |
33c5cd75 | 11112 | info_ptr = section.buffer; |
3019eac3 DE |
11113 | |
11114 | if (info_ptr == NULL) | |
33c5cd75 | 11115 | return; |
3019eac3 | 11116 | |
b4f54984 | 11117 | if (dwarf_read_debug) |
19c3d4c9 DE |
11118 | { |
11119 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
96b79293 TT |
11120 | section.get_name (), |
11121 | section.get_file_name ()); | |
19c3d4c9 | 11122 | } |
3019eac3 | 11123 | |
33c5cd75 | 11124 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11125 | while (info_ptr < end_ptr) |
11126 | { | |
11127 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 11128 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
11129 | struct dwo_unit *dwo_unit; |
11130 | void **slot; | |
11131 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 DE |
11132 | |
11133 | memset (&per_cu, 0, sizeof (per_cu)); | |
e3b94546 | 11134 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11135 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11136 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11137 | per_cu.section = §ion; | |
11138 | ||
c0ab21c2 TT |
11139 | cutu_reader reader (&per_cu, cu, &dwo_file); |
11140 | if (!reader.dummy_p) | |
11141 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 11142 | &dwo_file, &read_unit); |
33c5cd75 DB |
11143 | info_ptr += per_cu.length; |
11144 | ||
11145 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 11146 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 11147 | continue; |
3019eac3 | 11148 | |
33c5cd75 | 11149 | if (cus_htab == NULL) |
298e9637 | 11150 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 11151 | |
33c5cd75 | 11152 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
c0ab21c2 | 11153 | *dwo_unit = read_unit; |
b0b6a987 | 11154 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
11155 | gdb_assert (slot != NULL); |
11156 | if (*slot != NULL) | |
19c3d4c9 | 11157 | { |
33c5cd75 DB |
11158 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11159 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11160 | |
b98664d3 | 11161 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11162 | " the entry at offset %s, signature %s"), |
11163 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11164 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11165 | } |
33c5cd75 | 11166 | *slot = (void *)dwo_unit; |
3019eac3 | 11167 | } |
3019eac3 DE |
11168 | } |
11169 | ||
80626a55 DE |
11170 | /* DWP file .debug_{cu,tu}_index section format: |
11171 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11172 | ||
d2415c6c DE |
11173 | DWP Version 1: |
11174 | ||
80626a55 DE |
11175 | Both index sections have the same format, and serve to map a 64-bit |
11176 | signature to a set of section numbers. Each section begins with a header, | |
11177 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11178 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11179 | aligned at 8-byte boundaries in the file. | |
11180 | ||
d2415c6c DE |
11181 | The index section header consists of: |
11182 | ||
11183 | V, 32 bit version number | |
11184 | -, 32 bits unused | |
11185 | N, 32 bit number of compilation units or type units in the index | |
11186 | M, 32 bit number of slots in the hash table | |
80626a55 | 11187 | |
d2415c6c | 11188 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11189 | |
d2415c6c DE |
11190 | The hash table begins at offset 16 in the section, and consists of an array |
11191 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11192 | order of the application binary). Unused slots in the hash table are 0. | |
11193 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11194 | |
d2415c6c DE |
11195 | The parallel table begins immediately after the hash table |
11196 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11197 | array of 32-bit indexes (using the byte order of the application binary), | |
11198 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11199 | table contains a 32-bit index into the pool of section numbers. For unused | |
11200 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11201 | |
73869dc2 DE |
11202 | The pool of section numbers begins immediately following the hash table |
11203 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11204 | section numbers consists of an array of 32-bit words (using the byte order | |
11205 | of the application binary). Each item in the array is indexed starting | |
11206 | from 0. The hash table entry provides the index of the first section | |
11207 | number in the set. Additional section numbers in the set follow, and the | |
11208 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
11209 | ||
11210 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
11211 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
11212 | be the second entry. Other members of the set may follow in any order. | |
11213 | ||
11214 | --- | |
11215 | ||
11216 | DWP Version 2: | |
11217 | ||
11218 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
11219 | and the entries in the index tables are now offsets into these sections. | |
11220 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
11221 | section. | |
11222 | ||
11223 | Index Section Contents: | |
11224 | Header | |
11225 | Hash Table of Signatures dwp_hash_table.hash_table | |
11226 | Parallel Table of Indices dwp_hash_table.unit_table | |
11227 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
11228 | Table of Section Sizes dwp_hash_table.v2.sizes | |
11229 | ||
11230 | The index section header consists of: | |
11231 | ||
11232 | V, 32 bit version number | |
11233 | L, 32 bit number of columns in the table of section offsets | |
11234 | N, 32 bit number of compilation units or type units in the index | |
11235 | M, 32 bit number of slots in the hash table | |
11236 | ||
11237 | Numbers are recorded using the byte order of the application binary. | |
11238 | ||
11239 | The hash table has the same format as version 1. | |
11240 | The parallel table of indices has the same format as version 1, | |
11241 | except that the entries are origin-1 indices into the table of sections | |
11242 | offsets and the table of section sizes. | |
11243 | ||
11244 | The table of offsets begins immediately following the parallel table | |
11245 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11246 | a two-dimensional array of 32-bit words (using the byte order of the | |
11247 | application binary), with L columns and N+1 rows, in row-major order. | |
11248 | Each row in the array is indexed starting from 0. The first row provides | |
11249 | a key to the remaining rows: each column in this row provides an identifier | |
11250 | for a debug section, and the offsets in the same column of subsequent rows | |
11251 | refer to that section. The section identifiers are: | |
11252 | ||
11253 | DW_SECT_INFO 1 .debug_info.dwo | |
11254 | DW_SECT_TYPES 2 .debug_types.dwo | |
11255 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11256 | DW_SECT_LINE 4 .debug_line.dwo | |
11257 | DW_SECT_LOC 5 .debug_loc.dwo | |
11258 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11259 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11260 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11261 | ||
11262 | The offsets provided by the CU and TU index sections are the base offsets | |
11263 | for the contributions made by each CU or TU to the corresponding section | |
11264 | in the package file. Each CU and TU header contains an abbrev_offset | |
11265 | field, used to find the abbreviations table for that CU or TU within the | |
11266 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11267 | be interpreted as relative to the base offset given in the index section. | |
11268 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11269 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11270 | and offsets into other debug sections obtained from DWARF attributes should | |
11271 | also be interpreted as relative to the corresponding base offset. | |
11272 | ||
11273 | The table of sizes begins immediately following the table of offsets. | |
11274 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11275 | with L columns and N rows, in row-major order. Each row in the array is | |
11276 | indexed starting from 1 (row 0 is shared by the two tables). | |
11277 | ||
11278 | --- | |
11279 | ||
11280 | Hash table lookup is handled the same in version 1 and 2: | |
11281 | ||
11282 | We assume that N and M will not exceed 2^32 - 1. | |
11283 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11284 | ||
d2415c6c DE |
11285 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11286 | in the hash table is located as follows: | |
80626a55 | 11287 | |
d2415c6c DE |
11288 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11289 | the low-order k bits all set to 1. | |
80626a55 | 11290 | |
d2415c6c | 11291 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11292 | |
d2415c6c DE |
11293 | 3) If the hash table entry at index H matches the signature, use that |
11294 | entry. If the hash table entry at index H is unused (all zeroes), | |
11295 | terminate the search: the signature is not present in the table. | |
80626a55 | 11296 | |
d2415c6c | 11297 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11298 | |
d2415c6c | 11299 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11300 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11301 | |
11302 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11303 | .debug_{info,types}.dwo in DWP_FILE. | |
11304 | Returns NULL if there isn't one. | |
11305 | Note: This function processes DWP files only, not DWO files. */ | |
11306 | ||
11307 | static struct dwp_hash_table * | |
ed2dc618 SM |
11308 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11309 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
11310 | { |
11311 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 11312 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11313 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11314 | struct dwarf2_section_info *index; |
73869dc2 | 11315 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11316 | struct dwp_hash_table *htab; |
11317 | ||
11318 | if (is_debug_types) | |
11319 | index = &dwp_file->sections.tu_index; | |
11320 | else | |
11321 | index = &dwp_file->sections.cu_index; | |
11322 | ||
96b79293 | 11323 | if (index->empty ()) |
80626a55 | 11324 | return NULL; |
96b79293 | 11325 | index->read (objfile); |
80626a55 DE |
11326 | |
11327 | index_ptr = index->buffer; | |
11328 | index_end = index_ptr + index->size; | |
11329 | ||
11330 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
11331 | index_ptr += 4; |
11332 | if (version == 2) | |
11333 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
11334 | else | |
11335 | nr_columns = 0; | |
11336 | index_ptr += 4; | |
80626a55 DE |
11337 | nr_units = read_4_bytes (dbfd, index_ptr); |
11338 | index_ptr += 4; | |
11339 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11340 | index_ptr += 4; | |
11341 | ||
73869dc2 | 11342 | if (version != 1 && version != 2) |
80626a55 | 11343 | { |
21aa081e | 11344 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11345 | " [in module %s]"), |
21aa081e | 11346 | pulongest (version), dwp_file->name); |
80626a55 DE |
11347 | } |
11348 | if (nr_slots != (nr_slots & -nr_slots)) | |
11349 | { | |
21aa081e | 11350 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11351 | " is not power of 2 [in module %s]"), |
21aa081e | 11352 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11353 | } |
11354 | ||
11355 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
11356 | htab->version = version; |
11357 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11358 | htab->nr_units = nr_units; |
11359 | htab->nr_slots = nr_slots; | |
11360 | htab->hash_table = index_ptr; | |
11361 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11362 | |
11363 | /* Exit early if the table is empty. */ | |
11364 | if (nr_slots == 0 || nr_units == 0 | |
11365 | || (version == 2 && nr_columns == 0)) | |
11366 | { | |
11367 | /* All must be zero. */ | |
11368 | if (nr_slots != 0 || nr_units != 0 | |
11369 | || (version == 2 && nr_columns != 0)) | |
11370 | { | |
b98664d3 | 11371 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11372 | " all zero [in modules %s]"), |
11373 | dwp_file->name); | |
11374 | } | |
11375 | return htab; | |
11376 | } | |
11377 | ||
11378 | if (version == 1) | |
11379 | { | |
11380 | htab->section_pool.v1.indices = | |
11381 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11382 | /* It's harder to decide whether the section is too small in v1. | |
11383 | V1 is deprecated anyway so we punt. */ | |
11384 | } | |
11385 | else | |
11386 | { | |
11387 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11388 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11389 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11390 | /* Reverse map for error checking. */ |
11391 | int ids_seen[DW_SECT_MAX + 1]; | |
11392 | int i; | |
11393 | ||
11394 | if (nr_columns < 2) | |
11395 | { | |
11396 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11397 | " in section table [in module %s]"), | |
11398 | dwp_file->name); | |
11399 | } | |
11400 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11401 | { | |
11402 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11403 | " in section table [in module %s]"), | |
11404 | dwp_file->name); | |
11405 | } | |
04fd5eed GB |
11406 | memset (ids, 255, sizeof_ids); |
11407 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11408 | for (i = 0; i < nr_columns; ++i) |
11409 | { | |
11410 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11411 | ||
11412 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11413 | { | |
11414 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11415 | " in section table [in module %s]"), | |
11416 | id, dwp_file->name); | |
11417 | } | |
11418 | if (ids_seen[id] != -1) | |
11419 | { | |
11420 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11421 | " id %d in section table [in module %s]"), | |
11422 | id, dwp_file->name); | |
11423 | } | |
11424 | ids_seen[id] = i; | |
11425 | ids[i] = id; | |
11426 | } | |
11427 | /* Must have exactly one info or types section. */ | |
11428 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11429 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11430 | != 1) | |
11431 | { | |
11432 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11433 | " DWO info/types section [in module %s]"), | |
11434 | dwp_file->name); | |
11435 | } | |
11436 | /* Must have an abbrev section. */ | |
11437 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11438 | { | |
11439 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11440 | " section [in module %s]"), | |
11441 | dwp_file->name); | |
11442 | } | |
11443 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11444 | htab->section_pool.v2.sizes = | |
11445 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11446 | * nr_units * nr_columns); | |
11447 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11448 | * nr_units * nr_columns)) | |
11449 | > index_end) | |
11450 | { | |
11451 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11452 | " [in module %s]"), | |
11453 | dwp_file->name); | |
11454 | } | |
11455 | } | |
80626a55 DE |
11456 | |
11457 | return htab; | |
11458 | } | |
11459 | ||
11460 | /* Update SECTIONS with the data from SECTP. | |
11461 | ||
11462 | This function is like the other "locate" section routines that are | |
11463 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11464 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11465 | |
11466 | The result is non-zero for success, or zero if an error was found. */ | |
11467 | ||
11468 | static int | |
73869dc2 DE |
11469 | locate_v1_virtual_dwo_sections (asection *sectp, |
11470 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11471 | { |
11472 | const struct dwop_section_names *names = &dwop_section_names; | |
11473 | ||
11474 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11475 | { | |
11476 | /* There can be only one. */ | |
049412e3 | 11477 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11478 | return 0; |
049412e3 | 11479 | sections->abbrev.s.section = sectp; |
fd361982 | 11480 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
11481 | } |
11482 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11483 | || section_is_p (sectp->name, &names->types_dwo)) | |
11484 | { | |
11485 | /* There can be only one. */ | |
049412e3 | 11486 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11487 | return 0; |
049412e3 | 11488 | sections->info_or_types.s.section = sectp; |
fd361982 | 11489 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
11490 | } |
11491 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11492 | { | |
11493 | /* There can be only one. */ | |
049412e3 | 11494 | if (sections->line.s.section != NULL) |
80626a55 | 11495 | return 0; |
049412e3 | 11496 | sections->line.s.section = sectp; |
fd361982 | 11497 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
11498 | } |
11499 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11500 | { | |
11501 | /* There can be only one. */ | |
049412e3 | 11502 | if (sections->loc.s.section != NULL) |
80626a55 | 11503 | return 0; |
049412e3 | 11504 | sections->loc.s.section = sectp; |
fd361982 | 11505 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
11506 | } |
11507 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11508 | { | |
11509 | /* There can be only one. */ | |
049412e3 | 11510 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11511 | return 0; |
049412e3 | 11512 | sections->macinfo.s.section = sectp; |
fd361982 | 11513 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
11514 | } |
11515 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11516 | { | |
11517 | /* There can be only one. */ | |
049412e3 | 11518 | if (sections->macro.s.section != NULL) |
80626a55 | 11519 | return 0; |
049412e3 | 11520 | sections->macro.s.section = sectp; |
fd361982 | 11521 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
11522 | } |
11523 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11524 | { | |
11525 | /* There can be only one. */ | |
049412e3 | 11526 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11527 | return 0; |
049412e3 | 11528 | sections->str_offsets.s.section = sectp; |
fd361982 | 11529 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11530 | } |
11531 | else | |
11532 | { | |
11533 | /* No other kind of section is valid. */ | |
11534 | return 0; | |
11535 | } | |
11536 | ||
11537 | return 1; | |
11538 | } | |
11539 | ||
73869dc2 DE |
11540 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11541 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11542 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11543 | This is for DWP version 1 files. */ | |
80626a55 DE |
11544 | |
11545 | static struct dwo_unit * | |
ed2dc618 SM |
11546 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11547 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11548 | uint32_t unit_index, |
11549 | const char *comp_dir, | |
11550 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11551 | { |
11552 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11553 | const struct dwp_hash_table *dwp_htab = |
11554 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11555 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11556 | const char *kind = is_debug_types ? "TU" : "CU"; |
11557 | struct dwo_file *dwo_file; | |
11558 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11559 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11560 | void **dwo_file_slot; |
80626a55 DE |
11561 | int i; |
11562 | ||
73869dc2 DE |
11563 | gdb_assert (dwp_file->version == 1); |
11564 | ||
b4f54984 | 11565 | if (dwarf_read_debug) |
80626a55 | 11566 | { |
73869dc2 | 11567 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11568 | kind, |
73869dc2 | 11569 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11570 | dwp_file->name); |
11571 | } | |
11572 | ||
19ac8c2e | 11573 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11574 | Put a limit on the number of sections we look for so that bad data |
11575 | doesn't cause us to loop forever. */ | |
11576 | ||
73869dc2 | 11577 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11578 | (1 /* .debug_info or .debug_types */ \ |
11579 | + 1 /* .debug_abbrev */ \ | |
11580 | + 1 /* .debug_line */ \ | |
11581 | + 1 /* .debug_loc */ \ | |
11582 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11583 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11584 | + 1 /* trailing zero */) |
11585 | ||
11586 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11587 | |
73869dc2 | 11588 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11589 | { |
11590 | asection *sectp; | |
11591 | uint32_t section_nr = | |
11592 | read_4_bytes (dbfd, | |
73869dc2 DE |
11593 | dwp_htab->section_pool.v1.indices |
11594 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11595 | |
11596 | if (section_nr == 0) | |
11597 | break; | |
11598 | if (section_nr >= dwp_file->num_sections) | |
11599 | { | |
11600 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11601 | " [in module %s]"), | |
11602 | dwp_file->name); | |
11603 | } | |
11604 | ||
11605 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11606 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11607 | { |
11608 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11609 | " [in module %s]"), | |
11610 | dwp_file->name); | |
11611 | } | |
11612 | } | |
11613 | ||
11614 | if (i < 2 | |
96b79293 TT |
11615 | || sections.info_or_types.empty () |
11616 | || sections.abbrev.empty ()) | |
80626a55 DE |
11617 | { |
11618 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11619 | " [in module %s]"), | |
11620 | dwp_file->name); | |
11621 | } | |
73869dc2 | 11622 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11623 | { |
11624 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11625 | " [in module %s]"), | |
11626 | dwp_file->name); | |
11627 | } | |
11628 | ||
11629 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11630 | have dwo_unit "live" in that. At least for now. | |
11631 | ||
11632 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11633 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11634 | file, we can combine them back into a virtual DWO file to save space |
11635 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11636 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11637 | ||
791afaa2 TT |
11638 | std::string virtual_dwo_name = |
11639 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11640 | sections.abbrev.get_id (), |
11641 | sections.line.get_id (), | |
11642 | sections.loc.get_id (), | |
11643 | sections.str_offsets.get_id ()); | |
80626a55 | 11644 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11645 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11646 | virtual_dwo_name.c_str (), | |
11647 | comp_dir); | |
80626a55 DE |
11648 | /* Create one if necessary. */ |
11649 | if (*dwo_file_slot == NULL) | |
11650 | { | |
b4f54984 | 11651 | if (dwarf_read_debug) |
80626a55 DE |
11652 | { |
11653 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11654 | virtual_dwo_name.c_str ()); |
80626a55 | 11655 | } |
51ac9db5 | 11656 | dwo_file = new struct dwo_file; |
efba19b0 TT |
11657 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
11658 | virtual_dwo_name); | |
0ac5b59e | 11659 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11660 | dwo_file->sections.abbrev = sections.abbrev; |
11661 | dwo_file->sections.line = sections.line; | |
11662 | dwo_file->sections.loc = sections.loc; | |
11663 | dwo_file->sections.macinfo = sections.macinfo; | |
11664 | dwo_file->sections.macro = sections.macro; | |
11665 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11666 | /* The "str" section is global to the entire DWP file. */ | |
11667 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11668 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11669 | there's no need to record it in dwo_file. |
11670 | Also, we can't simply record type sections in dwo_file because | |
11671 | we record a pointer into the vector in dwo_unit. As we collect more | |
11672 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11673 | for it, invalidating all copies of pointers into the previous |
11674 | contents. */ | |
80626a55 DE |
11675 | *dwo_file_slot = dwo_file; |
11676 | } | |
11677 | else | |
11678 | { | |
b4f54984 | 11679 | if (dwarf_read_debug) |
80626a55 DE |
11680 | { |
11681 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11682 | virtual_dwo_name.c_str ()); |
80626a55 | 11683 | } |
9a3c8263 | 11684 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11685 | } |
80626a55 DE |
11686 | |
11687 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11688 | dwo_unit->dwo_file = dwo_file; | |
11689 | dwo_unit->signature = signature; | |
8d749320 SM |
11690 | dwo_unit->section = |
11691 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11692 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11693 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11694 | |
11695 | return dwo_unit; | |
11696 | } | |
11697 | ||
73869dc2 DE |
11698 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11699 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11700 | piece within that section used by a TU/CU, return a virtual section | |
11701 | of just that piece. */ | |
11702 | ||
11703 | static struct dwarf2_section_info | |
ed2dc618 SM |
11704 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11705 | struct dwarf2_section_info *section, | |
73869dc2 DE |
11706 | bfd_size_type offset, bfd_size_type size) |
11707 | { | |
11708 | struct dwarf2_section_info result; | |
11709 | asection *sectp; | |
11710 | ||
11711 | gdb_assert (section != NULL); | |
11712 | gdb_assert (!section->is_virtual); | |
11713 | ||
11714 | memset (&result, 0, sizeof (result)); | |
11715 | result.s.containing_section = section; | |
dc4ccb6f | 11716 | result.is_virtual = true; |
73869dc2 DE |
11717 | |
11718 | if (size == 0) | |
11719 | return result; | |
11720 | ||
96b79293 | 11721 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11722 | |
11723 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11724 | bounds of the real section. This is a pretty-rare event, so just | |
11725 | flag an error (easier) instead of a warning and trying to cope. */ | |
11726 | if (sectp == NULL | |
fd361982 | 11727 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11728 | { |
73869dc2 DE |
11729 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
11730 | " in section %s [in module %s]"), | |
fd361982 | 11731 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
11732 | objfile_name (dwarf2_per_objfile->objfile)); |
11733 | } | |
11734 | ||
11735 | result.virtual_offset = offset; | |
11736 | result.size = size; | |
11737 | return result; | |
11738 | } | |
11739 | ||
11740 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11741 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11742 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11743 | This is for DWP version 2 files. */ | |
11744 | ||
11745 | static struct dwo_unit * | |
ed2dc618 SM |
11746 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11747 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11748 | uint32_t unit_index, |
11749 | const char *comp_dir, | |
11750 | ULONGEST signature, int is_debug_types) | |
11751 | { | |
11752 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11753 | const struct dwp_hash_table *dwp_htab = | |
11754 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11755 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11756 | const char *kind = is_debug_types ? "TU" : "CU"; |
11757 | struct dwo_file *dwo_file; | |
11758 | struct dwo_unit *dwo_unit; | |
11759 | struct virtual_v2_dwo_sections sections; | |
11760 | void **dwo_file_slot; | |
73869dc2 DE |
11761 | int i; |
11762 | ||
11763 | gdb_assert (dwp_file->version == 2); | |
11764 | ||
b4f54984 | 11765 | if (dwarf_read_debug) |
73869dc2 DE |
11766 | { |
11767 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11768 | kind, | |
11769 | pulongest (unit_index), hex_string (signature), | |
11770 | dwp_file->name); | |
11771 | } | |
11772 | ||
11773 | /* Fetch the section offsets of this DWO unit. */ | |
11774 | ||
11775 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11776 | |
11777 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11778 | { | |
11779 | uint32_t offset = read_4_bytes (dbfd, | |
11780 | dwp_htab->section_pool.v2.offsets | |
11781 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11782 | + i) | |
11783 | * sizeof (uint32_t))); | |
11784 | uint32_t size = read_4_bytes (dbfd, | |
11785 | dwp_htab->section_pool.v2.sizes | |
11786 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11787 | + i) | |
11788 | * sizeof (uint32_t))); | |
11789 | ||
11790 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11791 | { | |
11792 | case DW_SECT_INFO: | |
11793 | case DW_SECT_TYPES: | |
11794 | sections.info_or_types_offset = offset; | |
11795 | sections.info_or_types_size = size; | |
11796 | break; | |
11797 | case DW_SECT_ABBREV: | |
11798 | sections.abbrev_offset = offset; | |
11799 | sections.abbrev_size = size; | |
11800 | break; | |
11801 | case DW_SECT_LINE: | |
11802 | sections.line_offset = offset; | |
11803 | sections.line_size = size; | |
11804 | break; | |
11805 | case DW_SECT_LOC: | |
11806 | sections.loc_offset = offset; | |
11807 | sections.loc_size = size; | |
11808 | break; | |
11809 | case DW_SECT_STR_OFFSETS: | |
11810 | sections.str_offsets_offset = offset; | |
11811 | sections.str_offsets_size = size; | |
11812 | break; | |
11813 | case DW_SECT_MACINFO: | |
11814 | sections.macinfo_offset = offset; | |
11815 | sections.macinfo_size = size; | |
11816 | break; | |
11817 | case DW_SECT_MACRO: | |
11818 | sections.macro_offset = offset; | |
11819 | sections.macro_size = size; | |
11820 | break; | |
11821 | } | |
11822 | } | |
11823 | ||
11824 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11825 | have dwo_unit "live" in that. At least for now. | |
11826 | ||
11827 | The DWP file can be made up of a random collection of CUs and TUs. | |
11828 | However, for each CU + set of TUs that came from the same original DWO | |
11829 | file, we can combine them back into a virtual DWO file to save space | |
11830 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11831 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11832 | ||
791afaa2 TT |
11833 | std::string virtual_dwo_name = |
11834 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11835 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11836 | (long) (sections.line_size ? sections.line_offset : 0), | |
11837 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11838 | (long) (sections.str_offsets_size | |
11839 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11840 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11841 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11842 | virtual_dwo_name.c_str (), | |
11843 | comp_dir); | |
73869dc2 DE |
11844 | /* Create one if necessary. */ |
11845 | if (*dwo_file_slot == NULL) | |
11846 | { | |
b4f54984 | 11847 | if (dwarf_read_debug) |
73869dc2 DE |
11848 | { |
11849 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11850 | virtual_dwo_name.c_str ()); |
73869dc2 | 11851 | } |
51ac9db5 | 11852 | dwo_file = new struct dwo_file; |
efba19b0 TT |
11853 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
11854 | virtual_dwo_name); | |
73869dc2 DE |
11855 | dwo_file->comp_dir = comp_dir; |
11856 | dwo_file->sections.abbrev = | |
ed2dc618 | 11857 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
11858 | sections.abbrev_offset, sections.abbrev_size); |
11859 | dwo_file->sections.line = | |
ed2dc618 | 11860 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
11861 | sections.line_offset, sections.line_size); |
11862 | dwo_file->sections.loc = | |
ed2dc618 | 11863 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
11864 | sections.loc_offset, sections.loc_size); |
11865 | dwo_file->sections.macinfo = | |
ed2dc618 | 11866 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
11867 | sections.macinfo_offset, sections.macinfo_size); |
11868 | dwo_file->sections.macro = | |
ed2dc618 | 11869 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
11870 | sections.macro_offset, sections.macro_size); |
11871 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
11872 | create_dwp_v2_section (dwarf2_per_objfile, |
11873 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
11874 | sections.str_offsets_offset, |
11875 | sections.str_offsets_size); | |
11876 | /* The "str" section is global to the entire DWP file. */ | |
11877 | dwo_file->sections.str = dwp_file->sections.str; | |
11878 | /* The info or types section is assigned below to dwo_unit, | |
11879 | there's no need to record it in dwo_file. | |
11880 | Also, we can't simply record type sections in dwo_file because | |
11881 | we record a pointer into the vector in dwo_unit. As we collect more | |
11882 | types we'll grow the vector and eventually have to reallocate space | |
11883 | for it, invalidating all copies of pointers into the previous | |
11884 | contents. */ | |
11885 | *dwo_file_slot = dwo_file; | |
11886 | } | |
11887 | else | |
11888 | { | |
b4f54984 | 11889 | if (dwarf_read_debug) |
73869dc2 DE |
11890 | { |
11891 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11892 | virtual_dwo_name.c_str ()); |
73869dc2 | 11893 | } |
9a3c8263 | 11894 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11895 | } |
73869dc2 DE |
11896 | |
11897 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11898 | dwo_unit->dwo_file = dwo_file; | |
11899 | dwo_unit->signature = signature; | |
8d749320 SM |
11900 | dwo_unit->section = |
11901 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
11902 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
11903 | is_debug_types | |
73869dc2 DE |
11904 | ? &dwp_file->sections.types |
11905 | : &dwp_file->sections.info, | |
11906 | sections.info_or_types_offset, | |
11907 | sections.info_or_types_size); | |
11908 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11909 | ||
11910 | return dwo_unit; | |
11911 | } | |
11912 | ||
57d63ce2 DE |
11913 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11914 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11915 | |
11916 | static struct dwo_unit * | |
ed2dc618 SM |
11917 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11918 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 11919 | ULONGEST signature, int is_debug_types) |
80626a55 | 11920 | { |
57d63ce2 DE |
11921 | const struct dwp_hash_table *dwp_htab = |
11922 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11923 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 11924 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11925 | uint32_t hash = signature & mask; |
11926 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11927 | unsigned int i; | |
11928 | void **slot; | |
870f88f7 | 11929 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11930 | |
11931 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11932 | find_dwo_cu.signature = signature; | |
19ac8c2e | 11933 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
11934 | ? dwp_file->loaded_tus.get () |
11935 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 11936 | &find_dwo_cu, INSERT); |
80626a55 DE |
11937 | |
11938 | if (*slot != NULL) | |
9a3c8263 | 11939 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11940 | |
11941 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11942 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11943 | { |
11944 | ULONGEST signature_in_table; | |
11945 | ||
11946 | signature_in_table = | |
57d63ce2 | 11947 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11948 | if (signature_in_table == signature) |
11949 | { | |
57d63ce2 DE |
11950 | uint32_t unit_index = |
11951 | read_4_bytes (dbfd, | |
11952 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11953 | |
73869dc2 DE |
11954 | if (dwp_file->version == 1) |
11955 | { | |
ed2dc618 SM |
11956 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
11957 | dwp_file, unit_index, | |
73869dc2 DE |
11958 | comp_dir, signature, |
11959 | is_debug_types); | |
11960 | } | |
11961 | else | |
11962 | { | |
ed2dc618 SM |
11963 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
11964 | dwp_file, unit_index, | |
73869dc2 DE |
11965 | comp_dir, signature, |
11966 | is_debug_types); | |
11967 | } | |
9a3c8263 | 11968 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11969 | } |
11970 | if (signature_in_table == 0) | |
11971 | return NULL; | |
11972 | hash = (hash + hash2) & mask; | |
11973 | } | |
11974 | ||
11975 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11976 | " [in module %s]"), | |
11977 | dwp_file->name); | |
11978 | } | |
11979 | ||
ab5088bf | 11980 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11981 | Open the file specified by FILE_NAME and hand it off to BFD for |
11982 | preliminary analysis. Return a newly initialized bfd *, which | |
11983 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11984 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11985 | SEARCH_CWD is true if the current directory is to be searched. |
11986 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11987 | If successful, the file is added to the bfd include table of the |
11988 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11989 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11990 | NOTE: This function is derived from symfile_bfd_open. */ |
11991 | ||
192b62ce | 11992 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
11993 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11994 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 11995 | { |
24b9144d | 11996 | int desc; |
9c02c129 DE |
11997 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
11998 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
11999 | to debug_file_directory. */ | |
e0cc99a6 | 12000 | const char *search_path; |
9c02c129 DE |
12001 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12002 | ||
e0cc99a6 | 12003 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12004 | if (search_cwd) |
12005 | { | |
12006 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12007 | { |
12008 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12009 | debug_file_directory, | |
12010 | (char *) NULL)); | |
12011 | search_path = search_path_holder.get (); | |
12012 | } | |
6ac97d4c | 12013 | else |
e0cc99a6 | 12014 | search_path = "."; |
6ac97d4c | 12015 | } |
9c02c129 | 12016 | else |
e0cc99a6 | 12017 | search_path = debug_file_directory; |
3019eac3 | 12018 | |
24b9144d | 12019 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12020 | if (is_dwp) |
12021 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12022 | |
12023 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12024 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12025 | O_RDONLY | O_BINARY, &absolute_name); |
12026 | if (desc < 0) | |
12027 | return NULL; | |
12028 | ||
e0cc99a6 TT |
12029 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12030 | gnutarget, desc)); | |
9c02c129 DE |
12031 | if (sym_bfd == NULL) |
12032 | return NULL; | |
192b62ce | 12033 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12034 | |
192b62ce TT |
12035 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12036 | return NULL; | |
3019eac3 | 12037 | |
13aaf454 DE |
12038 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12039 | This is important because things like demangled_names_hash lives in the | |
12040 | objfile's per_bfd space and may have references to things like symbol | |
12041 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12042 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12043 | |
3019eac3 DE |
12044 | return sym_bfd; |
12045 | } | |
12046 | ||
ab5088bf | 12047 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12048 | COMP_DIR is the DW_AT_comp_dir attribute. |
12049 | The result is the bfd handle of the file. | |
12050 | If there is a problem finding or opening the file, return NULL. | |
12051 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12052 | same as symfile_bfd_open. */ | |
12053 | ||
192b62ce | 12054 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12055 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12056 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12057 | { |
80626a55 | 12058 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12059 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12060 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12061 | |
12062 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12063 | ||
12064 | if (comp_dir != NULL) | |
12065 | { | |
43816ebc TT |
12066 | gdb::unique_xmalloc_ptr<char> path_to_try |
12067 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12068 | |
12069 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12070 | search path, which seems useful. */ | |
ed2dc618 | 12071 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
43816ebc | 12072 | path_to_try.get (), |
ed2dc618 | 12073 | 0 /*is_dwp*/, |
192b62ce | 12074 | 1 /*search_cwd*/)); |
3019eac3 DE |
12075 | if (abfd != NULL) |
12076 | return abfd; | |
12077 | } | |
12078 | ||
12079 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12080 | is a list of paths. */ | |
12081 | ||
12082 | if (*debug_file_directory == '\0') | |
12083 | return NULL; | |
12084 | ||
ed2dc618 SM |
12085 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12086 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12087 | } |
12088 | ||
80626a55 DE |
12089 | /* This function is mapped across the sections and remembers the offset and |
12090 | size of each of the DWO debugging sections we are interested in. */ | |
12091 | ||
12092 | static void | |
12093 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12094 | { | |
9a3c8263 | 12095 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12096 | const struct dwop_section_names *names = &dwop_section_names; |
12097 | ||
12098 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12099 | { | |
049412e3 | 12100 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12101 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12102 | } |
12103 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12104 | { | |
049412e3 | 12105 | dwo_sections->info.s.section = sectp; |
fd361982 | 12106 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12107 | } |
12108 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12109 | { | |
049412e3 | 12110 | dwo_sections->line.s.section = sectp; |
fd361982 | 12111 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12112 | } |
12113 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12114 | { | |
049412e3 | 12115 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12116 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12117 | } |
12118 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12119 | { | |
049412e3 | 12120 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12121 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12122 | } |
12123 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12124 | { | |
049412e3 | 12125 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12126 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12127 | } |
12128 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12129 | { | |
049412e3 | 12130 | dwo_sections->str.s.section = sectp; |
fd361982 | 12131 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
12132 | } |
12133 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12134 | { | |
049412e3 | 12135 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12136 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12137 | } |
12138 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12139 | { | |
12140 | struct dwarf2_section_info type_section; | |
12141 | ||
12142 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12143 | type_section.s.section = sectp; |
fd361982 | 12144 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12145 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12146 | } |
12147 | } | |
12148 | ||
ab5088bf | 12149 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12150 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12151 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12152 | |
12153 | static struct dwo_file * | |
0ac5b59e DE |
12154 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12155 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12156 | { |
ed2dc618 | 12157 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12158 | |
fb1eb2f9 | 12159 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12160 | if (dbfd == NULL) |
12161 | { | |
b4f54984 | 12162 | if (dwarf_read_debug) |
80626a55 DE |
12163 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12164 | return NULL; | |
12165 | } | |
263db9a1 | 12166 | |
51ac9db5 | 12167 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12168 | dwo_file->dwo_name = dwo_name; |
12169 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12170 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12171 | |
fb1eb2f9 | 12172 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 12173 | &dwo_file->sections); |
3019eac3 | 12174 | |
18a8505e AT |
12175 | create_cus_hash_table (dwarf2_per_objfile, per_cu->cu, *dwo_file, |
12176 | dwo_file->sections.info, dwo_file->cus); | |
3019eac3 | 12177 | |
263db9a1 | 12178 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12179 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12180 | |
b4f54984 | 12181 | if (dwarf_read_debug) |
80626a55 DE |
12182 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12183 | ||
263db9a1 | 12184 | return dwo_file.release (); |
3019eac3 DE |
12185 | } |
12186 | ||
80626a55 | 12187 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12188 | size of each of the DWP debugging sections common to version 1 and 2 that |
12189 | we are interested in. */ | |
3019eac3 | 12190 | |
80626a55 | 12191 | static void |
73869dc2 DE |
12192 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12193 | void *dwp_file_ptr) | |
3019eac3 | 12194 | { |
9a3c8263 | 12195 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12196 | const struct dwop_section_names *names = &dwop_section_names; |
12197 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12198 | |
80626a55 | 12199 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12200 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12201 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12202 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12203 | |
80626a55 DE |
12204 | /* Look for specific sections that we need. */ |
12205 | if (section_is_p (sectp->name, &names->str_dwo)) | |
12206 | { | |
049412e3 | 12207 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12208 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
12209 | } |
12210 | else if (section_is_p (sectp->name, &names->cu_index)) | |
12211 | { | |
049412e3 | 12212 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12213 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12214 | } |
12215 | else if (section_is_p (sectp->name, &names->tu_index)) | |
12216 | { | |
049412e3 | 12217 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12218 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12219 | } |
12220 | } | |
3019eac3 | 12221 | |
73869dc2 DE |
12222 | /* This function is mapped across the sections and remembers the offset and |
12223 | size of each of the DWP version 2 debugging sections that we are interested | |
12224 | in. This is split into a separate function because we don't know if we | |
12225 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
12226 | ||
12227 | static void | |
12228 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12229 | { | |
9a3c8263 | 12230 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12231 | const struct dwop_section_names *names = &dwop_section_names; |
12232 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12233 | ||
12234 | /* Record the ELF section number for later lookup: this is what the | |
12235 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12236 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12237 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12238 | ||
12239 | /* Look for specific sections that we need. */ | |
12240 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12241 | { | |
049412e3 | 12242 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12243 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
12244 | } |
12245 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12246 | { | |
049412e3 | 12247 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12248 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
12249 | } |
12250 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12251 | { | |
049412e3 | 12252 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12253 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
12254 | } |
12255 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12256 | { | |
049412e3 | 12257 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12258 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
12259 | } |
12260 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12261 | { | |
049412e3 | 12262 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12263 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
12264 | } |
12265 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12266 | { | |
049412e3 | 12267 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12268 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
12269 | } |
12270 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12271 | { | |
049412e3 | 12272 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12273 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
12274 | } |
12275 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12276 | { | |
049412e3 | 12277 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12278 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12279 | } |
12280 | } | |
12281 | ||
80626a55 | 12282 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12283 | |
80626a55 DE |
12284 | static hashval_t |
12285 | hash_dwp_loaded_cutus (const void *item) | |
12286 | { | |
9a3c8263 | 12287 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12288 | |
80626a55 DE |
12289 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12290 | return dwo_unit->signature; | |
3019eac3 DE |
12291 | } |
12292 | ||
80626a55 | 12293 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12294 | |
80626a55 DE |
12295 | static int |
12296 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12297 | { |
9a3c8263 SM |
12298 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12299 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12300 | |
80626a55 DE |
12301 | return dua->signature == dub->signature; |
12302 | } | |
3019eac3 | 12303 | |
80626a55 | 12304 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12305 | |
48b490f2 | 12306 | static htab_up |
298e9637 | 12307 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12308 | { |
48b490f2 TT |
12309 | return htab_up (htab_create_alloc (3, |
12310 | hash_dwp_loaded_cutus, | |
12311 | eq_dwp_loaded_cutus, | |
12312 | NULL, xcalloc, xfree)); | |
80626a55 | 12313 | } |
3019eac3 | 12314 | |
ab5088bf DE |
12315 | /* Try to open DWP file FILE_NAME. |
12316 | The result is the bfd handle of the file. | |
12317 | If there is a problem finding or opening the file, return NULL. | |
12318 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12319 | same as symfile_bfd_open. */ | |
12320 | ||
192b62ce | 12321 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12322 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12323 | const char *file_name) | |
ab5088bf | 12324 | { |
ed2dc618 SM |
12325 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
12326 | 1 /*is_dwp*/, | |
192b62ce | 12327 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12328 | if (abfd != NULL) |
12329 | return abfd; | |
12330 | ||
12331 | /* Work around upstream bug 15652. | |
12332 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12333 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12334 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12335 | of the executable's path may have discarded the needed info. | |
12336 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12337 | .gnu_debuglink, but that doesn't exist yet.] | |
12338 | Strip the directory from FILE_NAME and search again. */ | |
12339 | if (*debug_file_directory != '\0') | |
12340 | { | |
12341 | /* Don't implicitly search the current directory here. | |
12342 | If the user wants to search "." to handle this case, | |
12343 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
12344 | return try_open_dwop_file (dwarf2_per_objfile, |
12345 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
12346 | 0 /*search_cwd*/); |
12347 | } | |
12348 | ||
12349 | return NULL; | |
ab5088bf DE |
12350 | } |
12351 | ||
80626a55 DE |
12352 | /* Initialize the use of the DWP file for the current objfile. |
12353 | By convention the name of the DWP file is ${objfile}.dwp. | |
12354 | The result is NULL if it can't be found. */ | |
a766d390 | 12355 | |
400174b1 | 12356 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 12357 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
12358 | { |
12359 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 12360 | |
82bf32bc JK |
12361 | /* Try to find first .dwp for the binary file before any symbolic links |
12362 | resolving. */ | |
6c447423 DE |
12363 | |
12364 | /* If the objfile is a debug file, find the name of the real binary | |
12365 | file and get the name of dwp file from there. */ | |
d721ba37 | 12366 | std::string dwp_name; |
6c447423 DE |
12367 | if (objfile->separate_debug_objfile_backlink != NULL) |
12368 | { | |
12369 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12370 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12371 | |
d721ba37 | 12372 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12373 | } |
12374 | else | |
d721ba37 PA |
12375 | dwp_name = objfile->original_name; |
12376 | ||
12377 | dwp_name += ".dwp"; | |
80626a55 | 12378 | |
ed2dc618 | 12379 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12380 | if (dbfd == NULL |
12381 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12382 | { | |
12383 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12384 | dwp_name = objfile_name (objfile); |
12385 | dwp_name += ".dwp"; | |
ed2dc618 | 12386 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12387 | } |
12388 | ||
80626a55 DE |
12389 | if (dbfd == NULL) |
12390 | { | |
b4f54984 | 12391 | if (dwarf_read_debug) |
d721ba37 | 12392 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 12393 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12394 | } |
400174b1 TT |
12395 | |
12396 | const char *name = bfd_get_filename (dbfd.get ()); | |
12397 | std::unique_ptr<struct dwp_file> dwp_file | |
12398 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12399 | |
0a0f4c01 | 12400 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
12401 | dwp_file->elf_sections = |
12402 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12403 | dwp_file->num_sections, asection *); | |
12404 | ||
400174b1 TT |
12405 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12406 | dwarf2_locate_common_dwp_sections, | |
12407 | dwp_file.get ()); | |
80626a55 | 12408 | |
400174b1 TT |
12409 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12410 | 0); | |
80626a55 | 12411 | |
400174b1 TT |
12412 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12413 | 1); | |
80626a55 | 12414 | |
73869dc2 | 12415 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12416 | if (dwp_file->cus && dwp_file->tus |
12417 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12418 | { |
12419 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12420 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12421 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12422 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12423 | " TU version %s [in DWP file %s]"), | |
12424 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12425 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12426 | } |
08302ed2 DE |
12427 | |
12428 | if (dwp_file->cus) | |
12429 | dwp_file->version = dwp_file->cus->version; | |
12430 | else if (dwp_file->tus) | |
12431 | dwp_file->version = dwp_file->tus->version; | |
12432 | else | |
12433 | dwp_file->version = 2; | |
73869dc2 DE |
12434 | |
12435 | if (dwp_file->version == 2) | |
400174b1 TT |
12436 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12437 | dwarf2_locate_v2_dwp_sections, | |
12438 | dwp_file.get ()); | |
73869dc2 | 12439 | |
298e9637 SM |
12440 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12441 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12442 | |
b4f54984 | 12443 | if (dwarf_read_debug) |
80626a55 DE |
12444 | { |
12445 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12446 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12447 | " %s CUs, %s TUs\n", |
12448 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12449 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12450 | } |
12451 | ||
12452 | return dwp_file; | |
3019eac3 | 12453 | } |
c906108c | 12454 | |
ab5088bf DE |
12455 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12456 | ||
12457 | static struct dwp_file * | |
ed2dc618 | 12458 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
12459 | { |
12460 | if (! dwarf2_per_objfile->dwp_checked) | |
12461 | { | |
ed2dc618 SM |
12462 | dwarf2_per_objfile->dwp_file |
12463 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
12464 | dwarf2_per_objfile->dwp_checked = 1; |
12465 | } | |
400174b1 | 12466 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
12467 | } |
12468 | ||
80626a55 DE |
12469 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12470 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12471 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12472 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12473 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12474 | ||
12475 | This is called, for example, when wanting to read a variable with a | |
12476 | complex location. Therefore we don't want to do file i/o for every call. | |
12477 | Therefore we don't want to look for a DWO file on every call. | |
12478 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12479 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12480 | for a DWO file. | |
12481 | ||
1c658ad5 | 12482 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12483 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12484 | |
3019eac3 | 12485 | static struct dwo_unit * |
80626a55 DE |
12486 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12487 | const char *dwo_name, const char *comp_dir, | |
12488 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 12489 | { |
ed2dc618 | 12490 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 12491 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
12492 | const char *kind = is_debug_types ? "TU" : "CU"; |
12493 | void **dwo_file_slot; | |
3019eac3 | 12494 | struct dwo_file *dwo_file; |
80626a55 | 12495 | struct dwp_file *dwp_file; |
cb1df416 | 12496 | |
6a506a2d DE |
12497 | /* First see if there's a DWP file. |
12498 | If we have a DWP file but didn't find the DWO inside it, don't | |
12499 | look for the original DWO file. It makes gdb behave differently | |
12500 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12501 | |
ed2dc618 | 12502 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 12503 | if (dwp_file != NULL) |
cf2c3c16 | 12504 | { |
80626a55 DE |
12505 | const struct dwp_hash_table *dwp_htab = |
12506 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12507 | ||
12508 | if (dwp_htab != NULL) | |
12509 | { | |
12510 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 12511 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 12512 | signature, is_debug_types); |
80626a55 DE |
12513 | |
12514 | if (dwo_cutu != NULL) | |
12515 | { | |
b4f54984 | 12516 | if (dwarf_read_debug) |
80626a55 DE |
12517 | { |
12518 | fprintf_unfiltered (gdb_stdlog, | |
12519 | "Virtual DWO %s %s found: @%s\n", | |
12520 | kind, hex_string (signature), | |
12521 | host_address_to_string (dwo_cutu)); | |
12522 | } | |
12523 | return dwo_cutu; | |
12524 | } | |
12525 | } | |
12526 | } | |
6a506a2d | 12527 | else |
80626a55 | 12528 | { |
6a506a2d | 12529 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12530 | |
ed2dc618 SM |
12531 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12532 | dwo_name, comp_dir); | |
6a506a2d | 12533 | if (*dwo_file_slot == NULL) |
80626a55 | 12534 | { |
6a506a2d DE |
12535 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12536 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12537 | } |
6a506a2d | 12538 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12539 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12540 | |
6a506a2d | 12541 | if (dwo_file != NULL) |
19c3d4c9 | 12542 | { |
6a506a2d DE |
12543 | struct dwo_unit *dwo_cutu = NULL; |
12544 | ||
12545 | if (is_debug_types && dwo_file->tus) | |
12546 | { | |
12547 | struct dwo_unit find_dwo_cutu; | |
12548 | ||
12549 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12550 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12551 | dwo_cutu |
b0b6a987 TT |
12552 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12553 | &find_dwo_cutu); | |
6a506a2d | 12554 | } |
33c5cd75 | 12555 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12556 | { |
33c5cd75 DB |
12557 | struct dwo_unit find_dwo_cutu; |
12558 | ||
12559 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12560 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12561 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12562 | &find_dwo_cutu); |
6a506a2d DE |
12563 | } |
12564 | ||
12565 | if (dwo_cutu != NULL) | |
12566 | { | |
b4f54984 | 12567 | if (dwarf_read_debug) |
6a506a2d DE |
12568 | { |
12569 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12570 | kind, dwo_name, hex_string (signature), | |
12571 | host_address_to_string (dwo_cutu)); | |
12572 | } | |
12573 | return dwo_cutu; | |
80626a55 DE |
12574 | } |
12575 | } | |
2e276125 | 12576 | } |
9cdd5dbd | 12577 | |
80626a55 DE |
12578 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12579 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12580 | correctly to find the file. */ | |
12581 | ||
b4f54984 | 12582 | if (dwarf_read_debug) |
80626a55 DE |
12583 | { |
12584 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12585 | kind, dwo_name, hex_string (signature)); | |
12586 | } | |
3019eac3 | 12587 | |
6656a72d DE |
12588 | /* This is a warning and not a complaint because it can be caused by |
12589 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12590 | { |
12591 | /* Print the name of the DWP file if we looked there, helps the user | |
12592 | better diagnose the problem. */ | |
791afaa2 | 12593 | std::string dwp_text; |
43942612 DE |
12594 | |
12595 | if (dwp_file != NULL) | |
791afaa2 TT |
12596 | dwp_text = string_printf (" [in DWP file %s]", |
12597 | lbasename (dwp_file->name)); | |
43942612 | 12598 | |
9d8780f0 | 12599 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
12600 | " [in module %s]"), |
12601 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12602 | dwp_text.c_str (), |
43942612 | 12603 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 12604 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12605 | } |
3019eac3 | 12606 | return NULL; |
5fb290d7 DJ |
12607 | } |
12608 | ||
80626a55 DE |
12609 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12610 | See lookup_dwo_cutu_unit for details. */ | |
12611 | ||
12612 | static struct dwo_unit * | |
12613 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12614 | const char *dwo_name, const char *comp_dir, | |
12615 | ULONGEST signature) | |
12616 | { | |
12617 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12618 | } | |
12619 | ||
12620 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12621 | See lookup_dwo_cutu_unit for details. */ | |
12622 | ||
12623 | static struct dwo_unit * | |
12624 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12625 | const char *dwo_name, const char *comp_dir) | |
12626 | { | |
12627 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12628 | } | |
12629 | ||
89e63ee4 DE |
12630 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12631 | ||
12632 | static int | |
12633 | queue_and_load_dwo_tu (void **slot, void *info) | |
12634 | { | |
12635 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12636 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12637 | ULONGEST signature = dwo_unit->signature; | |
12638 | struct signatured_type *sig_type = | |
12639 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12640 | ||
12641 | if (sig_type != NULL) | |
12642 | { | |
12643 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12644 | ||
12645 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12646 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12647 | while processing PER_CU. */ | |
12648 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12649 | load_full_type_unit (sig_cu); | |
ae640021 | 12650 | per_cu->imported_symtabs_push (sig_cu); |
89e63ee4 DE |
12651 | } |
12652 | ||
12653 | return 1; | |
12654 | } | |
12655 | ||
12656 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12657 | The DWO may have the only definition of the type, though it may not be | |
12658 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12659 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12660 | ||
12661 | static void | |
12662 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12663 | { | |
12664 | struct dwo_unit *dwo_unit; | |
12665 | struct dwo_file *dwo_file; | |
12666 | ||
12667 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 12668 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
12669 | gdb_assert (per_cu->cu != NULL); |
12670 | ||
12671 | dwo_unit = per_cu->cu->dwo_unit; | |
12672 | gdb_assert (dwo_unit != NULL); | |
12673 | ||
12674 | dwo_file = dwo_unit->dwo_file; | |
12675 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
12676 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, |
12677 | per_cu); | |
89e63ee4 DE |
12678 | } |
12679 | ||
3019eac3 | 12680 | /* Read in various DIEs. */ |
348e048f | 12681 | |
d389af10 | 12682 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12683 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12684 | already referenced by DW_AT_abstract_origin from the children of the | |
12685 | current DIE. */ | |
d389af10 JK |
12686 | |
12687 | static void | |
12688 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12689 | { | |
12690 | struct die_info *child_die; | |
791afaa2 | 12691 | sect_offset *offsetp; |
d389af10 JK |
12692 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12693 | struct die_info *origin_die; | |
12694 | /* Iterator of the ORIGIN_DIE children. */ | |
12695 | struct die_info *origin_child_die; | |
d389af10 | 12696 | struct attribute *attr; |
cd02d79d PA |
12697 | struct dwarf2_cu *origin_cu; |
12698 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12699 | |
12700 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12701 | if (!attr) | |
12702 | return; | |
12703 | ||
cd02d79d PA |
12704 | /* Note that following die references may follow to a die in a |
12705 | different cu. */ | |
12706 | ||
12707 | origin_cu = cu; | |
12708 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12709 | ||
12710 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12711 | symbols in. */ | |
12712 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12713 | origin_cu->list_in_scope = cu->list_in_scope; | |
12714 | ||
edb3359d DJ |
12715 | if (die->tag != origin_die->tag |
12716 | && !(die->tag == DW_TAG_inlined_subroutine | |
12717 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12718 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12719 | sect_offset_str (die->sect_off), |
12720 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12721 | |
791afaa2 | 12722 | std::vector<sect_offset> offsets; |
d389af10 | 12723 | |
3ea89b92 PMR |
12724 | for (child_die = die->child; |
12725 | child_die && child_die->tag; | |
12726 | child_die = sibling_die (child_die)) | |
12727 | { | |
12728 | struct die_info *child_origin_die; | |
12729 | struct dwarf2_cu *child_origin_cu; | |
12730 | ||
12731 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12732 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12733 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12734 | present in the abstract instance but not referenced in the concrete | |
12735 | one. */ | |
216f72a1 JK |
12736 | if (child_die->tag == DW_TAG_call_site |
12737 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12738 | continue; |
12739 | ||
c38f313d DJ |
12740 | /* For each CHILD_DIE, find the corresponding child of |
12741 | ORIGIN_DIE. If there is more than one layer of | |
12742 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12743 | but GCC versions at least through 4.4 generate this (GCC PR | |
12744 | 40573). */ | |
3ea89b92 PMR |
12745 | child_origin_die = child_die; |
12746 | child_origin_cu = cu; | |
c38f313d DJ |
12747 | while (1) |
12748 | { | |
cd02d79d PA |
12749 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12750 | child_origin_cu); | |
c38f313d DJ |
12751 | if (attr == NULL) |
12752 | break; | |
cd02d79d PA |
12753 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12754 | &child_origin_cu); | |
c38f313d DJ |
12755 | } |
12756 | ||
d389af10 JK |
12757 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12758 | counterpart may exist. */ | |
c38f313d | 12759 | if (child_origin_die != child_die) |
d389af10 | 12760 | { |
edb3359d DJ |
12761 | if (child_die->tag != child_origin_die->tag |
12762 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12763 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12764 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12765 | "different tags"), |
9d8780f0 SM |
12766 | sect_offset_str (child_die->sect_off), |
12767 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12768 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12769 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12770 | "different parents"), |
9d8780f0 SM |
12771 | sect_offset_str (child_die->sect_off), |
12772 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12773 | else |
791afaa2 | 12774 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12775 | } |
d389af10 | 12776 | } |
791afaa2 TT |
12777 | std::sort (offsets.begin (), offsets.end ()); |
12778 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12779 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12780 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12781 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12782 | "to DIE %s as their abstract origin"), |
12783 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12784 | |
791afaa2 | 12785 | offsetp = offsets.data (); |
d389af10 JK |
12786 | origin_child_die = origin_die->child; |
12787 | while (origin_child_die && origin_child_die->tag) | |
12788 | { | |
12789 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12790 | while (offsetp < offsets_end |
9c541725 | 12791 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12792 | offsetp++; |
b64f50a1 | 12793 | if (offsetp >= offsets_end |
9c541725 | 12794 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12795 | { |
adde2bff DE |
12796 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12797 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12798 | This can happen with mutually referenced abstract_origins. | |
12799 | PR 16581. */ | |
12800 | if (!origin_child_die->in_process) | |
12801 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12802 | } |
12803 | origin_child_die = sibling_die (origin_child_die); | |
12804 | } | |
cd02d79d | 12805 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12806 | |
12807 | if (cu != origin_cu) | |
12808 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12809 | } |
12810 | ||
c906108c | 12811 | static void |
e7c27a73 | 12812 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12813 | { |
518817b3 | 12814 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 12815 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12816 | struct context_stack *newobj; |
c906108c SS |
12817 | CORE_ADDR lowpc; |
12818 | CORE_ADDR highpc; | |
12819 | struct die_info *child_die; | |
edb3359d | 12820 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12821 | const char *name; |
e142c38c | 12822 | CORE_ADDR baseaddr; |
801e3a5b | 12823 | struct block *block; |
edb3359d | 12824 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12825 | std::vector<struct symbol *> template_args; |
34eaf542 | 12826 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12827 | |
12828 | if (inlined_func) | |
12829 | { | |
12830 | /* If we do not have call site information, we can't show the | |
12831 | caller of this inlined function. That's too confusing, so | |
12832 | only use the scope for local variables. */ | |
12833 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12834 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12835 | if (call_line == NULL || call_file == NULL) | |
12836 | { | |
12837 | read_lexical_block_scope (die, cu); | |
12838 | return; | |
12839 | } | |
12840 | } | |
c906108c | 12841 | |
b3b3bada | 12842 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12843 | |
94af9270 | 12844 | name = dwarf2_name (die, cu); |
c906108c | 12845 | |
e8d05480 JB |
12846 | /* Ignore functions with missing or empty names. These are actually |
12847 | illegal according to the DWARF standard. */ | |
12848 | if (name == NULL) | |
12849 | { | |
b98664d3 | 12850 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12851 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12852 | return; |
12853 | } | |
12854 | ||
12855 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12856 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12857 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12858 | { |
ae4d0c03 PM |
12859 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12860 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 12861 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12862 | "for subprogram DIE at %s"), |
12863 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12864 | return; |
12865 | } | |
c906108c | 12866 | |
3e29f34a MR |
12867 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12868 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12869 | |
34eaf542 TT |
12870 | /* If we have any template arguments, then we must allocate a |
12871 | different sort of symbol. */ | |
12872 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12873 | { | |
12874 | if (child_die->tag == DW_TAG_template_type_param | |
12875 | || child_die->tag == DW_TAG_template_value_param) | |
12876 | { | |
e623cf5d | 12877 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12878 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12879 | break; |
12880 | } | |
12881 | } | |
12882 | ||
c24bdb02 | 12883 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
12884 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
12885 | (struct symbol *) templ_func); | |
4c2df51b | 12886 | |
81873cc8 | 12887 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 12888 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
12889 | cu->language); |
12890 | ||
4cecd739 DJ |
12891 | /* If there is a location expression for DW_AT_frame_base, record |
12892 | it. */ | |
e142c38c | 12893 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 12894 | if (attr != nullptr) |
fe978cb0 | 12895 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12896 | |
63e43d3a PMR |
12897 | /* If there is a location for the static link, record it. */ |
12898 | newobj->static_link = NULL; | |
12899 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 12900 | if (attr != nullptr) |
63e43d3a | 12901 | { |
224c3ddb SM |
12902 | newobj->static_link |
12903 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 12904 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
09ba997f | 12905 | cu->per_cu->addr_type ()); |
63e43d3a PMR |
12906 | } |
12907 | ||
c24bdb02 | 12908 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 12909 | |
639d11d3 | 12910 | if (die->child != NULL) |
c906108c | 12911 | { |
639d11d3 | 12912 | child_die = die->child; |
c906108c SS |
12913 | while (child_die && child_die->tag) |
12914 | { | |
34eaf542 TT |
12915 | if (child_die->tag == DW_TAG_template_type_param |
12916 | || child_die->tag == DW_TAG_template_value_param) | |
12917 | { | |
12918 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12919 | ||
f1078f66 | 12920 | if (arg != NULL) |
2f4732b0 | 12921 | template_args.push_back (arg); |
34eaf542 TT |
12922 | } |
12923 | else | |
12924 | process_die (child_die, cu); | |
c906108c SS |
12925 | child_die = sibling_die (child_die); |
12926 | } | |
12927 | } | |
12928 | ||
d389af10 JK |
12929 | inherit_abstract_dies (die, cu); |
12930 | ||
4a811a97 UW |
12931 | /* If we have a DW_AT_specification, we might need to import using |
12932 | directives from the context of the specification DIE. See the | |
12933 | comment in determine_prefix. */ | |
12934 | if (cu->language == language_cplus | |
12935 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12936 | { | |
12937 | struct dwarf2_cu *spec_cu = cu; | |
12938 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12939 | ||
12940 | while (spec_die) | |
12941 | { | |
12942 | child_die = spec_die->child; | |
12943 | while (child_die && child_die->tag) | |
12944 | { | |
12945 | if (child_die->tag == DW_TAG_imported_module) | |
12946 | process_die (child_die, spec_cu); | |
12947 | child_die = sibling_die (child_die); | |
12948 | } | |
12949 | ||
12950 | /* In some cases, GCC generates specification DIEs that | |
12951 | themselves contain DW_AT_specification attributes. */ | |
12952 | spec_die = die_specification (spec_die, &spec_cu); | |
12953 | } | |
12954 | } | |
12955 | ||
c24bdb02 | 12956 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 12957 | /* Make a block for the local symbols within. */ |
c24bdb02 | 12958 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 12959 | cstk.static_link, lowpc, highpc); |
801e3a5b | 12960 | |
df8a16a1 | 12961 | /* For C++, set the block's scope. */ |
45280282 IB |
12962 | if ((cu->language == language_cplus |
12963 | || cu->language == language_fortran | |
c44af4eb TT |
12964 | || cu->language == language_d |
12965 | || cu->language == language_rust) | |
4d4ec4e5 | 12966 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12967 | block_set_scope (block, determine_prefix (die, cu), |
12968 | &objfile->objfile_obstack); | |
df8a16a1 | 12969 | |
801e3a5b JB |
12970 | /* If we have address ranges, record them. */ |
12971 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12972 | |
a60f3166 | 12973 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 12974 | |
34eaf542 | 12975 | /* Attach template arguments to function. */ |
2f4732b0 | 12976 | if (!template_args.empty ()) |
34eaf542 TT |
12977 | { |
12978 | gdb_assert (templ_func != NULL); | |
12979 | ||
2f4732b0 | 12980 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12981 | templ_func->template_arguments |
8d749320 SM |
12982 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
12983 | templ_func->n_template_arguments); | |
34eaf542 | 12984 | memcpy (templ_func->template_arguments, |
2f4732b0 | 12985 | template_args.data (), |
34eaf542 | 12986 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
12987 | |
12988 | /* Make sure that the symtab is set on the new symbols. Even | |
12989 | though they don't appear in this symtab directly, other parts | |
12990 | of gdb assume that symbols do, and this is reasonably | |
12991 | true. */ | |
8634679f | 12992 | for (symbol *sym : template_args) |
3e1d3d8c | 12993 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
12994 | } |
12995 | ||
208d8187 JB |
12996 | /* In C++, we can have functions nested inside functions (e.g., when |
12997 | a function declares a class that has methods). This means that | |
12998 | when we finish processing a function scope, we may need to go | |
12999 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13000 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13001 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13002 | |
921e78cf JB |
13003 | /* If we've finished processing a top-level function, subsequent |
13004 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13005 | if (cu->get_builder ()->outermost_context_p ()) |
13006 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13007 | } |
13008 | ||
13009 | /* Process all the DIES contained within a lexical block scope. Start | |
13010 | a new scope, process the dies, and then close the scope. */ | |
13011 | ||
13012 | static void | |
e7c27a73 | 13013 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13014 | { |
518817b3 | 13015 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13016 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13017 | CORE_ADDR lowpc, highpc; |
13018 | struct die_info *child_die; | |
e142c38c DJ |
13019 | CORE_ADDR baseaddr; |
13020 | ||
b3b3bada | 13021 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13022 | |
13023 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13024 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13025 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13026 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13027 | describe ranges. */ |
e385593e JK |
13028 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13029 | { | |
13030 | case PC_BOUNDS_NOT_PRESENT: | |
13031 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13032 | there was no wrapping by that DW_TAG_lexical_block. | |
13033 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13034 | for (child_die = die->child; | |
13035 | child_die != NULL && child_die->tag; | |
13036 | child_die = sibling_die (child_die)) | |
13037 | process_die (child_die, cu); | |
13038 | return; | |
13039 | case PC_BOUNDS_INVALID: | |
13040 | return; | |
13041 | } | |
3e29f34a MR |
13042 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13043 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13044 | |
c24bdb02 | 13045 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13046 | if (die->child != NULL) |
c906108c | 13047 | { |
639d11d3 | 13048 | child_die = die->child; |
c906108c SS |
13049 | while (child_die && child_die->tag) |
13050 | { | |
e7c27a73 | 13051 | process_die (child_die, cu); |
c906108c SS |
13052 | child_die = sibling_die (child_die); |
13053 | } | |
13054 | } | |
3ea89b92 | 13055 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13056 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13057 | |
c24bdb02 KS |
13058 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13059 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13060 | { |
801e3a5b | 13061 | struct block *block |
c24bdb02 | 13062 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13063 | cstk.start_addr, highpc); |
801e3a5b JB |
13064 | |
13065 | /* Note that recording ranges after traversing children, as we | |
13066 | do here, means that recording a parent's ranges entails | |
13067 | walking across all its children's ranges as they appear in | |
13068 | the address map, which is quadratic behavior. | |
13069 | ||
13070 | It would be nicer to record the parent's ranges before | |
13071 | traversing its children, simply overriding whatever you find | |
13072 | there. But since we don't even decide whether to create a | |
13073 | block until after we've traversed its children, that's hard | |
13074 | to do. */ | |
13075 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13076 | } |
c24bdb02 KS |
13077 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13078 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13079 | } |
13080 | ||
216f72a1 | 13081 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13082 | |
13083 | static void | |
13084 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13085 | { | |
518817b3 | 13086 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13087 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13088 | CORE_ADDR pc, baseaddr; | |
13089 | struct attribute *attr; | |
13090 | struct call_site *call_site, call_site_local; | |
13091 | void **slot; | |
13092 | int nparams; | |
13093 | struct die_info *child_die; | |
13094 | ||
b3b3bada | 13095 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13096 | |
216f72a1 JK |
13097 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13098 | if (attr == NULL) | |
13099 | { | |
13100 | /* This was a pre-DWARF-5 GNU extension alias | |
13101 | for DW_AT_call_return_pc. */ | |
13102 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13103 | } | |
96408a79 SA |
13104 | if (!attr) |
13105 | { | |
b98664d3 | 13106 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13107 | "DIE %s [in module %s]"), |
13108 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13109 | return; |
13110 | } | |
cd6c91b4 | 13111 | pc = attr->value_as_address () + baseaddr; |
3e29f34a | 13112 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13113 | |
13114 | if (cu->call_site_htab == NULL) | |
13115 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13116 | NULL, &objfile->objfile_obstack, | |
13117 | hashtab_obstack_allocate, NULL); | |
13118 | call_site_local.pc = pc; | |
13119 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13120 | if (*slot != NULL) | |
13121 | { | |
b98664d3 | 13122 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13123 | "DIE %s [in module %s]"), |
13124 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13125 | objfile_name (objfile)); |
96408a79 SA |
13126 | return; |
13127 | } | |
13128 | ||
13129 | /* Count parameters at the caller. */ | |
13130 | ||
13131 | nparams = 0; | |
13132 | for (child_die = die->child; child_die && child_die->tag; | |
13133 | child_die = sibling_die (child_die)) | |
13134 | { | |
216f72a1 JK |
13135 | if (child_die->tag != DW_TAG_call_site_parameter |
13136 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13137 | { |
b98664d3 | 13138 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13139 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13140 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13141 | objfile_name (objfile)); |
96408a79 SA |
13142 | continue; |
13143 | } | |
13144 | ||
13145 | nparams++; | |
13146 | } | |
13147 | ||
224c3ddb SM |
13148 | call_site |
13149 | = ((struct call_site *) | |
13150 | obstack_alloc (&objfile->objfile_obstack, | |
13151 | sizeof (*call_site) | |
13152 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13153 | *slot = call_site; |
13154 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13155 | call_site->pc = pc; | |
13156 | ||
216f72a1 JK |
13157 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13158 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13159 | { |
13160 | struct die_info *func_die; | |
13161 | ||
13162 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13163 | for (func_die = die->parent; | |
13164 | func_die && func_die->tag != DW_TAG_subprogram | |
13165 | && func_die->tag != DW_TAG_subroutine_type; | |
13166 | func_die = func_die->parent); | |
13167 | ||
216f72a1 JK |
13168 | /* DW_AT_call_all_calls is a superset |
13169 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13170 | if (func_die |
216f72a1 | 13171 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13172 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13173 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13174 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13175 | { | |
13176 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13177 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13178 | both the initial caller containing the real return address PC and | |
13179 | the final callee containing the current PC of a chain of tail | |
13180 | calls do not need to have the tail call list complete. But any | |
13181 | function candidate for a virtual tail call frame searched via | |
13182 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13183 | determined unambiguously. */ | |
13184 | } | |
13185 | else | |
13186 | { | |
13187 | struct type *func_type = NULL; | |
13188 | ||
13189 | if (func_die) | |
13190 | func_type = get_die_type (func_die, cu); | |
13191 | if (func_type != NULL) | |
13192 | { | |
13193 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
13194 | ||
13195 | /* Enlist this call site to the function. */ | |
13196 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13197 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13198 | } | |
13199 | else | |
b98664d3 | 13200 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13201 | "DIE %s [in module %s]"), |
13202 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13203 | } |
13204 | } | |
13205 | ||
216f72a1 JK |
13206 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13207 | if (attr == NULL) | |
13208 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13209 | if (attr == NULL) | |
13210 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13211 | if (attr == NULL) |
216f72a1 JK |
13212 | { |
13213 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13214 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13215 | } | |
96408a79 | 13216 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
4fc6c0d5 | 13217 | if (!attr || (attr->form_is_block () && DW_BLOCK (attr)->size == 0)) |
96408a79 | 13218 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13219 | else if (attr->form_is_block ()) |
96408a79 SA |
13220 | { |
13221 | struct dwarf2_locexpr_baton *dlbaton; | |
13222 | ||
8d749320 | 13223 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
13224 | dlbaton->data = DW_BLOCK (attr)->data; |
13225 | dlbaton->size = DW_BLOCK (attr)->size; | |
13226 | dlbaton->per_cu = cu->per_cu; | |
13227 | ||
13228 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13229 | } | |
cd6c91b4 | 13230 | else if (attr->form_is_ref ()) |
96408a79 | 13231 | { |
96408a79 SA |
13232 | struct dwarf2_cu *target_cu = cu; |
13233 | struct die_info *target_die; | |
13234 | ||
ac9ec31b | 13235 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 13236 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
13237 | if (die_is_declaration (target_die, target_cu)) |
13238 | { | |
7d45c7c3 | 13239 | const char *target_physname; |
9112db09 JK |
13240 | |
13241 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13242 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13243 | if (target_physname == NULL) |
9112db09 | 13244 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13245 | if (target_physname == NULL) |
b98664d3 | 13246 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13247 | "physname, for referencing DIE %s [in module %s]"), |
13248 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13249 | else |
7d455152 | 13250 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13251 | } |
13252 | else | |
13253 | { | |
13254 | CORE_ADDR lowpc; | |
13255 | ||
13256 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13257 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13258 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13259 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13260 | "low pc, for referencing DIE %s [in module %s]"), |
13261 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13262 | else |
3e29f34a MR |
13263 | { |
13264 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13265 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13266 | } | |
96408a79 SA |
13267 | } |
13268 | } | |
13269 | else | |
b98664d3 | 13270 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13271 | "block nor reference, for DIE %s [in module %s]"), |
13272 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13273 | |
13274 | call_site->per_cu = cu->per_cu; | |
13275 | ||
13276 | for (child_die = die->child; | |
13277 | child_die && child_die->tag; | |
13278 | child_die = sibling_die (child_die)) | |
13279 | { | |
96408a79 | 13280 | struct call_site_parameter *parameter; |
1788b2d3 | 13281 | struct attribute *loc, *origin; |
96408a79 | 13282 | |
216f72a1 JK |
13283 | if (child_die->tag != DW_TAG_call_site_parameter |
13284 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
13285 | { |
13286 | /* Already printed the complaint above. */ | |
13287 | continue; | |
13288 | } | |
13289 | ||
13290 | gdb_assert (call_site->parameter_count < nparams); | |
13291 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13292 | ||
1788b2d3 JK |
13293 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13294 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13295 | register is contained in DW_AT_call_value. */ |
96408a79 | 13296 | |
24c5c679 | 13297 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13298 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13299 | if (origin == NULL) | |
13300 | { | |
13301 | /* This was a pre-DWARF-5 GNU extension alias | |
13302 | for DW_AT_call_parameter. */ | |
13303 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13304 | } | |
cd6c91b4 | 13305 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13306 | { |
1788b2d3 | 13307 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
13308 | |
13309 | sect_offset sect_off | |
13310 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
4057dfde | 13311 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13312 | { |
13313 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13314 | binding can be done only inside one CU. Such referenced DIE | |
13315 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13316 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13317 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13318 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13319 | objfile_name (objfile)); |
d76b7dbc JK |
13320 | continue; |
13321 | } | |
9c541725 PA |
13322 | parameter->u.param_cu_off |
13323 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13324 | } |
4fc6c0d5 | 13325 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13326 | { |
b98664d3 | 13327 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13328 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13329 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13330 | continue; |
13331 | } | |
24c5c679 | 13332 | else |
96408a79 | 13333 | { |
24c5c679 JK |
13334 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
13335 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
13336 | if (parameter->u.dwarf_reg != -1) | |
13337 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
13338 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
13339 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
13340 | ¶meter->u.fb_offset)) | |
13341 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13342 | else | |
13343 | { | |
b98664d3 | 13344 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13345 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13346 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13347 | "[in module %s]"), |
9d8780f0 | 13348 | sect_offset_str (child_die->sect_off), |
9c541725 | 13349 | objfile_name (objfile)); |
24c5c679 JK |
13350 | continue; |
13351 | } | |
96408a79 SA |
13352 | } |
13353 | ||
216f72a1 JK |
13354 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13355 | if (attr == NULL) | |
13356 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13357 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13358 | { |
b98664d3 | 13359 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13360 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13361 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13362 | objfile_name (objfile)); |
96408a79 SA |
13363 | continue; |
13364 | } | |
13365 | parameter->value = DW_BLOCK (attr)->data; | |
13366 | parameter->value_size = DW_BLOCK (attr)->size; | |
13367 | ||
13368 | /* Parameters are not pre-cleared by memset above. */ | |
13369 | parameter->data_value = NULL; | |
13370 | parameter->data_value_size = 0; | |
13371 | call_site->parameter_count++; | |
13372 | ||
216f72a1 JK |
13373 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13374 | if (attr == NULL) | |
13375 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13376 | if (attr != nullptr) |
96408a79 | 13377 | { |
4fc6c0d5 | 13378 | if (!attr->form_is_block ()) |
b98664d3 | 13379 | complaint (_("No DW_FORM_block* DW_AT_call_data_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 | else |
13384 | { | |
13385 | parameter->data_value = DW_BLOCK (attr)->data; | |
13386 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13387 | } | |
13388 | } | |
13389 | } | |
13390 | } | |
13391 | ||
71a3c369 TT |
13392 | /* Helper function for read_variable. If DIE represents a virtual |
13393 | table, then return the type of the concrete object that is | |
13394 | associated with the virtual table. Otherwise, return NULL. */ | |
13395 | ||
13396 | static struct type * | |
13397 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13398 | { | |
13399 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13400 | if (attr == NULL) | |
13401 | return NULL; | |
13402 | ||
13403 | /* Find the type DIE. */ | |
13404 | struct die_info *type_die = NULL; | |
13405 | struct dwarf2_cu *type_cu = cu; | |
13406 | ||
cd6c91b4 | 13407 | if (attr->form_is_ref ()) |
71a3c369 TT |
13408 | type_die = follow_die_ref (die, attr, &type_cu); |
13409 | if (type_die == NULL) | |
13410 | return NULL; | |
13411 | ||
13412 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13413 | return NULL; | |
13414 | return die_containing_type (type_die, type_cu); | |
13415 | } | |
13416 | ||
13417 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13418 | ||
13419 | static void | |
13420 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13421 | { | |
13422 | struct rust_vtable_symbol *storage = NULL; | |
13423 | ||
13424 | if (cu->language == language_rust) | |
13425 | { | |
13426 | struct type *containing_type = rust_containing_type (die, cu); | |
13427 | ||
13428 | if (containing_type != NULL) | |
13429 | { | |
518817b3 | 13430 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 | 13431 | |
468c0cbb | 13432 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol (); |
71a3c369 TT |
13433 | initialize_objfile_symbol (storage); |
13434 | storage->concrete_type = containing_type; | |
cf724bc9 | 13435 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13436 | } |
13437 | } | |
13438 | ||
e4a62c65 TV |
13439 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13440 | struct attribute *abstract_origin | |
13441 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13442 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13443 | if (res == NULL && loc && abstract_origin) | |
13444 | { | |
13445 | /* We have a variable without a name, but with a location and an abstract | |
13446 | origin. This may be a concrete instance of an abstract variable | |
13447 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13448 | later. */ | |
13449 | struct dwarf2_cu *origin_cu = cu; | |
13450 | struct die_info *origin_die | |
13451 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
13452 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 13453 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 13454 | } |
71a3c369 TT |
13455 | } |
13456 | ||
43988095 JK |
13457 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13458 | reading .debug_rnglists. | |
13459 | Callback's type should be: | |
13460 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13461 | Return true if the attributes are present and valid, otherwise, | |
13462 | return false. */ | |
13463 | ||
13464 | template <typename Callback> | |
13465 | static bool | |
13466 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13467 | Callback &&callback) | |
13468 | { | |
ed2dc618 | 13469 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13470 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13471 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 13472 | bfd *obfd = objfile->obfd; |
43988095 JK |
13473 | /* Base address selection entry. */ |
13474 | CORE_ADDR base; | |
13475 | int found_base; | |
43988095 | 13476 | const gdb_byte *buffer; |
43988095 JK |
13477 | CORE_ADDR baseaddr; |
13478 | bool overflow = false; | |
13479 | ||
13480 | found_base = cu->base_known; | |
13481 | base = cu->base_address; | |
13482 | ||
96b79293 | 13483 | dwarf2_per_objfile->rnglists.read (objfile); |
43988095 JK |
13484 | if (offset >= dwarf2_per_objfile->rnglists.size) |
13485 | { | |
b98664d3 | 13486 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13487 | offset); |
13488 | return false; | |
13489 | } | |
13490 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13491 | ||
b3b3bada | 13492 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13493 | |
13494 | while (1) | |
13495 | { | |
7814882a JK |
13496 | /* Initialize it due to a false compiler warning. */ |
13497 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13498 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13499 | + dwarf2_per_objfile->rnglists.size); | |
13500 | unsigned int bytes_read; | |
13501 | ||
13502 | if (buffer == buf_end) | |
13503 | { | |
13504 | overflow = true; | |
13505 | break; | |
13506 | } | |
13507 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13508 | switch (rlet) | |
13509 | { | |
13510 | case DW_RLE_end_of_list: | |
13511 | break; | |
13512 | case DW_RLE_base_address: | |
13513 | if (buffer + cu->header.addr_size > buf_end) | |
13514 | { | |
13515 | overflow = true; | |
13516 | break; | |
13517 | } | |
c8a7a66f | 13518 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13519 | found_base = 1; |
13520 | buffer += bytes_read; | |
13521 | break; | |
13522 | case DW_RLE_start_length: | |
13523 | if (buffer + cu->header.addr_size > buf_end) | |
13524 | { | |
13525 | overflow = true; | |
13526 | break; | |
13527 | } | |
c8a7a66f TT |
13528 | range_beginning = cu->header.read_address (obfd, buffer, |
13529 | &bytes_read); | |
43988095 JK |
13530 | buffer += bytes_read; |
13531 | range_end = (range_beginning | |
13532 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13533 | buffer += bytes_read; | |
13534 | if (buffer > buf_end) | |
13535 | { | |
13536 | overflow = true; | |
13537 | break; | |
13538 | } | |
13539 | break; | |
13540 | case DW_RLE_offset_pair: | |
13541 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13542 | buffer += bytes_read; | |
13543 | if (buffer > buf_end) | |
13544 | { | |
13545 | overflow = true; | |
13546 | break; | |
13547 | } | |
13548 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13549 | buffer += bytes_read; | |
13550 | if (buffer > buf_end) | |
13551 | { | |
13552 | overflow = true; | |
13553 | break; | |
13554 | } | |
13555 | break; | |
13556 | case DW_RLE_start_end: | |
13557 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13558 | { | |
13559 | overflow = true; | |
13560 | break; | |
13561 | } | |
c8a7a66f TT |
13562 | range_beginning = cu->header.read_address (obfd, buffer, |
13563 | &bytes_read); | |
43988095 | 13564 | buffer += bytes_read; |
c8a7a66f | 13565 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13566 | buffer += bytes_read; |
13567 | break; | |
13568 | default: | |
b98664d3 | 13569 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13570 | return false; |
13571 | } | |
13572 | if (rlet == DW_RLE_end_of_list || overflow) | |
13573 | break; | |
13574 | if (rlet == DW_RLE_base_address) | |
13575 | continue; | |
13576 | ||
13577 | if (!found_base) | |
13578 | { | |
13579 | /* We have no valid base address for the ranges | |
13580 | data. */ | |
b98664d3 | 13581 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13582 | return false; |
13583 | } | |
13584 | ||
13585 | if (range_beginning > range_end) | |
13586 | { | |
13587 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13588 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13589 | return false; |
13590 | } | |
13591 | ||
13592 | /* Empty range entries have no effect. */ | |
13593 | if (range_beginning == range_end) | |
13594 | continue; | |
13595 | ||
13596 | range_beginning += base; | |
13597 | range_end += base; | |
13598 | ||
13599 | /* A not-uncommon case of bad debug info. | |
13600 | Don't pollute the addrmap with bad data. */ | |
13601 | if (range_beginning + baseaddr == 0 | |
13602 | && !dwarf2_per_objfile->has_section_at_zero) | |
13603 | { | |
b98664d3 | 13604 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
13605 | " [in module %s]"), objfile_name (objfile)); |
13606 | continue; | |
13607 | } | |
13608 | ||
13609 | callback (range_beginning, range_end); | |
13610 | } | |
13611 | ||
13612 | if (overflow) | |
13613 | { | |
b98664d3 | 13614 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13615 | "for DW_AT_ranges attribute"), |
13616 | offset); | |
13617 | return false; | |
13618 | } | |
13619 | ||
13620 | return true; | |
13621 | } | |
13622 | ||
13623 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13624 | Callback's type should be: | |
13625 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13626 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13627 | |
43988095 | 13628 | template <typename Callback> |
43039443 | 13629 | static int |
5f46c5a5 | 13630 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13631 | Callback &&callback) |
43039443 | 13632 | { |
ed2dc618 | 13633 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13634 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13635 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
13636 | struct comp_unit_head *cu_header = &cu->header; |
13637 | bfd *obfd = objfile->obfd; | |
13638 | unsigned int addr_size = cu_header->addr_size; | |
13639 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13640 | /* Base address selection entry. */ | |
13641 | CORE_ADDR base; | |
13642 | int found_base; | |
13643 | unsigned int dummy; | |
d521ce57 | 13644 | const gdb_byte *buffer; |
ff013f42 | 13645 | CORE_ADDR baseaddr; |
43039443 | 13646 | |
43988095 JK |
13647 | if (cu_header->version >= 5) |
13648 | return dwarf2_rnglists_process (offset, cu, callback); | |
13649 | ||
d00adf39 DE |
13650 | found_base = cu->base_known; |
13651 | base = cu->base_address; | |
43039443 | 13652 | |
96b79293 | 13653 | dwarf2_per_objfile->ranges.read (objfile); |
dce234bc | 13654 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 13655 | { |
b98664d3 | 13656 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13657 | offset); |
13658 | return 0; | |
13659 | } | |
dce234bc | 13660 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13661 | |
b3b3bada | 13662 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13663 | |
43039443 JK |
13664 | while (1) |
13665 | { | |
13666 | CORE_ADDR range_beginning, range_end; | |
13667 | ||
c8a7a66f | 13668 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13669 | buffer += addr_size; |
c8a7a66f | 13670 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13671 | buffer += addr_size; |
13672 | offset += 2 * addr_size; | |
13673 | ||
13674 | /* An end of list marker is a pair of zero addresses. */ | |
13675 | if (range_beginning == 0 && range_end == 0) | |
13676 | /* Found the end of list entry. */ | |
13677 | break; | |
13678 | ||
13679 | /* Each base address selection entry is a pair of 2 values. | |
13680 | The first is the largest possible address, the second is | |
13681 | the base address. Check for a base address here. */ | |
13682 | if ((range_beginning & mask) == mask) | |
13683 | { | |
28d2bfb9 AB |
13684 | /* If we found the largest possible address, then we already |
13685 | have the base address in range_end. */ | |
13686 | base = range_end; | |
43039443 JK |
13687 | found_base = 1; |
13688 | continue; | |
13689 | } | |
13690 | ||
13691 | if (!found_base) | |
13692 | { | |
13693 | /* We have no valid base address for the ranges | |
13694 | data. */ | |
b98664d3 | 13695 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13696 | return 0; |
13697 | } | |
13698 | ||
9277c30c UW |
13699 | if (range_beginning > range_end) |
13700 | { | |
13701 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13702 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13703 | return 0; |
13704 | } | |
13705 | ||
13706 | /* Empty range entries have no effect. */ | |
13707 | if (range_beginning == range_end) | |
13708 | continue; | |
13709 | ||
43039443 JK |
13710 | range_beginning += base; |
13711 | range_end += base; | |
13712 | ||
01093045 DE |
13713 | /* A not-uncommon case of bad debug info. |
13714 | Don't pollute the addrmap with bad data. */ | |
13715 | if (range_beginning + baseaddr == 0 | |
13716 | && !dwarf2_per_objfile->has_section_at_zero) | |
13717 | { | |
b98664d3 | 13718 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13719 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13720 | continue; |
13721 | } | |
13722 | ||
5f46c5a5 JK |
13723 | callback (range_beginning, range_end); |
13724 | } | |
13725 | ||
13726 | return 1; | |
13727 | } | |
13728 | ||
13729 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13730 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13731 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13732 | ||
13733 | static int | |
13734 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13735 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
891813be | 13736 | dwarf2_psymtab *ranges_pst) |
5f46c5a5 | 13737 | { |
518817b3 | 13738 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 | 13739 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
b3b3bada | 13740 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13741 | int low_set = 0; |
13742 | CORE_ADDR low = 0; | |
13743 | CORE_ADDR high = 0; | |
13744 | int retval; | |
13745 | ||
13746 | retval = dwarf2_ranges_process (offset, cu, | |
13747 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13748 | { | |
9277c30c | 13749 | if (ranges_pst != NULL) |
3e29f34a MR |
13750 | { |
13751 | CORE_ADDR lowpc; | |
13752 | CORE_ADDR highpc; | |
13753 | ||
79748972 TT |
13754 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13755 | range_beginning + baseaddr) | |
13756 | - baseaddr); | |
13757 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13758 | range_end + baseaddr) | |
13759 | - baseaddr); | |
d320c2b5 TT |
13760 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
13761 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 13762 | } |
ff013f42 | 13763 | |
43039443 JK |
13764 | /* FIXME: This is recording everything as a low-high |
13765 | segment of consecutive addresses. We should have a | |
13766 | data structure for discontiguous block ranges | |
13767 | instead. */ | |
13768 | if (! low_set) | |
13769 | { | |
13770 | low = range_beginning; | |
13771 | high = range_end; | |
13772 | low_set = 1; | |
13773 | } | |
13774 | else | |
13775 | { | |
13776 | if (range_beginning < low) | |
13777 | low = range_beginning; | |
13778 | if (range_end > high) | |
13779 | high = range_end; | |
13780 | } | |
5f46c5a5 JK |
13781 | }); |
13782 | if (!retval) | |
13783 | return 0; | |
43039443 JK |
13784 | |
13785 | if (! low_set) | |
13786 | /* If the first entry is an end-of-list marker, the range | |
13787 | describes an empty scope, i.e. no instructions. */ | |
13788 | return 0; | |
13789 | ||
13790 | if (low_return) | |
13791 | *low_return = low; | |
13792 | if (high_return) | |
13793 | *high_return = high; | |
13794 | return 1; | |
13795 | } | |
13796 | ||
3a2b436a JK |
13797 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13798 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13799 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13800 | |
3a2b436a | 13801 | static enum pc_bounds_kind |
af34e669 | 13802 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13803 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13804 | dwarf2_psymtab *pst) |
c906108c | 13805 | { |
518817b3 SM |
13806 | struct dwarf2_per_objfile *dwarf2_per_objfile |
13807 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 13808 | struct attribute *attr; |
91da1414 | 13809 | struct attribute *attr_high; |
af34e669 DJ |
13810 | CORE_ADDR low = 0; |
13811 | CORE_ADDR high = 0; | |
e385593e | 13812 | enum pc_bounds_kind ret; |
c906108c | 13813 | |
91da1414 MW |
13814 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13815 | if (attr_high) | |
af34e669 | 13816 | { |
e142c38c | 13817 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13818 | if (attr != nullptr) |
91da1414 | 13819 | { |
cd6c91b4 TT |
13820 | low = attr->value_as_address (); |
13821 | high = attr_high->value_as_address (); | |
13822 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) | |
31aa7e4e | 13823 | high += low; |
91da1414 | 13824 | } |
af34e669 DJ |
13825 | else |
13826 | /* Found high w/o low attribute. */ | |
e385593e | 13827 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13828 | |
13829 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13830 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13831 | } |
c906108c | 13832 | else |
af34e669 | 13833 | { |
e142c38c | 13834 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13835 | if (attr != NULL) |
13836 | { | |
18a8505e | 13837 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
13838 | We take advantage of the fact that DW_AT_ranges does not appear |
13839 | in DW_TAG_compile_unit of DWO files. */ | |
13840 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13841 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13842 | + (need_ranges_base | |
13843 | ? cu->ranges_base | |
13844 | : 0)); | |
2e3cf129 | 13845 | |
af34e669 | 13846 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13847 | .debug_ranges section. */ |
2e3cf129 | 13848 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13849 | return PC_BOUNDS_INVALID; |
43039443 | 13850 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13851 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13852 | } |
e385593e JK |
13853 | else |
13854 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13855 | } |
c906108c | 13856 | |
48fbe735 | 13857 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 13858 | if (high <= low) |
e385593e | 13859 | return PC_BOUNDS_INVALID; |
c906108c SS |
13860 | |
13861 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13862 | eliminate duplicate copies of functions and vtables and such. | |
13863 | The linker will arbitrarily choose one and discard the others. | |
13864 | The AT_*_pc values for such functions refer to local labels in | |
13865 | these sections. If the section from that file was discarded, the | |
13866 | labels are not in the output, so the relocs get a value of 0. | |
13867 | If this is a discarded function, mark the pc bounds as invalid, | |
13868 | so that GDB will ignore it. */ | |
72dca2f5 | 13869 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13870 | return PC_BOUNDS_INVALID; |
c906108c SS |
13871 | |
13872 | *lowpc = low; | |
96408a79 SA |
13873 | if (highpc) |
13874 | *highpc = high; | |
af34e669 | 13875 | return ret; |
c906108c SS |
13876 | } |
13877 | ||
b084d499 JB |
13878 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13879 | its low and high PC addresses. Do nothing if these addresses could not | |
13880 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13881 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13882 | ||
13883 | static void | |
13884 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13885 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13886 | struct dwarf2_cu *cu) | |
13887 | { | |
13888 | CORE_ADDR low, high; | |
13889 | struct die_info *child = die->child; | |
13890 | ||
e385593e | 13891 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13892 | { |
325fac50 PA |
13893 | *lowpc = std::min (*lowpc, low); |
13894 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13895 | } |
13896 | ||
13897 | /* If the language does not allow nested subprograms (either inside | |
13898 | subprograms or lexical blocks), we're done. */ | |
13899 | if (cu->language != language_ada) | |
13900 | return; | |
6e70227d | 13901 | |
b084d499 JB |
13902 | /* Check all the children of the given DIE. If it contains nested |
13903 | subprograms, then check their pc bounds. Likewise, we need to | |
13904 | check lexical blocks as well, as they may also contain subprogram | |
13905 | definitions. */ | |
13906 | while (child && child->tag) | |
13907 | { | |
13908 | if (child->tag == DW_TAG_subprogram | |
13909 | || child->tag == DW_TAG_lexical_block) | |
13910 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13911 | child = sibling_die (child); | |
13912 | } | |
13913 | } | |
13914 | ||
fae299cd DC |
13915 | /* Get the low and high pc's represented by the scope DIE, and store |
13916 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13917 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13918 | ||
13919 | static void | |
13920 | get_scope_pc_bounds (struct die_info *die, | |
13921 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13922 | struct dwarf2_cu *cu) | |
13923 | { | |
13924 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13925 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13926 | CORE_ADDR current_low, current_high; | |
13927 | ||
3a2b436a | 13928 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13929 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13930 | { |
13931 | best_low = current_low; | |
13932 | best_high = current_high; | |
13933 | } | |
13934 | else | |
13935 | { | |
13936 | struct die_info *child = die->child; | |
13937 | ||
13938 | while (child && child->tag) | |
13939 | { | |
13940 | switch (child->tag) { | |
13941 | case DW_TAG_subprogram: | |
b084d499 | 13942 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13943 | break; |
13944 | case DW_TAG_namespace: | |
f55ee35c | 13945 | case DW_TAG_module: |
fae299cd DC |
13946 | /* FIXME: carlton/2004-01-16: Should we do this for |
13947 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13948 | that current GCC's always emit the DIEs corresponding | |
13949 | to definitions of methods of classes as children of a | |
13950 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13951 | the DIEs giving the declarations, which could be | |
13952 | anywhere). But I don't see any reason why the | |
13953 | standards says that they have to be there. */ | |
13954 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13955 | ||
13956 | if (current_low != ((CORE_ADDR) -1)) | |
13957 | { | |
325fac50 PA |
13958 | best_low = std::min (best_low, current_low); |
13959 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13960 | } |
13961 | break; | |
13962 | default: | |
0963b4bd | 13963 | /* Ignore. */ |
fae299cd DC |
13964 | break; |
13965 | } | |
13966 | ||
13967 | child = sibling_die (child); | |
13968 | } | |
13969 | } | |
13970 | ||
13971 | *lowpc = best_low; | |
13972 | *highpc = best_high; | |
13973 | } | |
13974 | ||
801e3a5b JB |
13975 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13976 | in DIE. */ | |
380bca97 | 13977 | |
801e3a5b JB |
13978 | static void |
13979 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13980 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13981 | { | |
518817b3 | 13982 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13983 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 13984 | struct attribute *attr; |
91da1414 | 13985 | struct attribute *attr_high; |
801e3a5b | 13986 | |
91da1414 MW |
13987 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13988 | if (attr_high) | |
801e3a5b | 13989 | { |
801e3a5b | 13990 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13991 | if (attr != nullptr) |
801e3a5b | 13992 | { |
cd6c91b4 TT |
13993 | CORE_ADDR low = attr->value_as_address (); |
13994 | CORE_ADDR high = attr_high->value_as_address (); | |
31aa7e4e | 13995 | |
cd6c91b4 | 13996 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 13997 | high += low; |
9a619af0 | 13998 | |
3e29f34a MR |
13999 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14000 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14001 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14002 | } |
14003 | } | |
14004 | ||
14005 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
435d3d88 | 14006 | if (attr != nullptr) |
801e3a5b | 14007 | { |
18a8505e | 14008 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
14009 | We take advantage of the fact that DW_AT_ranges does not appear |
14010 | in DW_TAG_compile_unit of DWO files. */ | |
14011 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14012 | |
14013 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14014 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14015 | unsigned long offset = (DW_UNSND (attr) |
14016 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14017 | |
2d5f09ec | 14018 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14019 | dwarf2_ranges_process (offset, cu, |
14020 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14021 | { | |
58fdfd2c JK |
14022 | start += baseaddr; |
14023 | end += baseaddr; | |
5f46c5a5 JK |
14024 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14025 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14026 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14027 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14028 | }); |
2d5f09ec KB |
14029 | |
14030 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14031 | } |
14032 | } | |
14033 | ||
685b1105 JK |
14034 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14035 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14036 | |
685b1105 JK |
14037 | static void |
14038 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14039 | { |
38360086 | 14040 | int major, minor; |
60d5a603 JK |
14041 | |
14042 | if (cu->producer == NULL) | |
14043 | { | |
14044 | /* For unknown compilers expect their behavior is DWARF version | |
14045 | compliant. | |
14046 | ||
14047 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14048 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14049 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14050 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14051 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14052 | } |
b1ffba5a | 14053 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14054 | { |
38360086 MW |
14055 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14056 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14057 | } |
5230b05a | 14058 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14059 | { |
14060 | cu->producer_is_icc = true; | |
14061 | cu->producer_is_icc_lt_14 = major < 14; | |
14062 | } | |
c258c396 JD |
14063 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14064 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14065 | else |
14066 | { | |
14067 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14068 | compliant. */ | |
60d5a603 JK |
14069 | } |
14070 | ||
9068261f | 14071 | cu->checked_producer = true; |
685b1105 | 14072 | } |
ba919b58 | 14073 | |
685b1105 JK |
14074 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14075 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14076 | during 4.6.0 experimental. */ | |
14077 | ||
9068261f | 14078 | static bool |
685b1105 JK |
14079 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14080 | { | |
14081 | if (!cu->checked_producer) | |
14082 | check_producer (cu); | |
14083 | ||
14084 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14085 | } |
14086 | ||
c258c396 JD |
14087 | |
14088 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14089 | with incorrect is_stmt attributes. */ | |
14090 | ||
14091 | static bool | |
14092 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14093 | { | |
14094 | if (!cu->checked_producer) | |
14095 | check_producer (cu); | |
14096 | ||
14097 | return cu->producer_is_codewarrior; | |
14098 | } | |
14099 | ||
405feb71 | 14100 | /* Return the default accessibility type if it is not overridden by |
60d5a603 JK |
14101 | DW_AT_accessibility. */ |
14102 | ||
14103 | static enum dwarf_access_attribute | |
14104 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14105 | { | |
14106 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14107 | { | |
14108 | /* The default DWARF 2 accessibility for members is public, the default | |
14109 | accessibility for inheritance is private. */ | |
14110 | ||
14111 | if (die->tag != DW_TAG_inheritance) | |
14112 | return DW_ACCESS_public; | |
14113 | else | |
14114 | return DW_ACCESS_private; | |
14115 | } | |
14116 | else | |
14117 | { | |
14118 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14119 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14120 | depends on the container kind. */ | |
14121 | ||
14122 | if (die->parent->tag == DW_TAG_class_type) | |
14123 | return DW_ACCESS_private; | |
14124 | else | |
14125 | return DW_ACCESS_public; | |
14126 | } | |
14127 | } | |
14128 | ||
74ac6d43 TT |
14129 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14130 | offset. If the attribute was not found return 0, otherwise return | |
14131 | 1. If it was found but could not properly be handled, set *OFFSET | |
14132 | to 0. */ | |
14133 | ||
14134 | static int | |
14135 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14136 | LONGEST *offset) | |
14137 | { | |
14138 | struct attribute *attr; | |
14139 | ||
14140 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14141 | if (attr != NULL) | |
14142 | { | |
14143 | *offset = 0; | |
14144 | ||
14145 | /* Note that we do not check for a section offset first here. | |
14146 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14147 | so if we see it, we can assume that a constant form is really | |
14148 | a constant and not a section offset. */ | |
cd6c91b4 | 14149 | if (attr->form_is_constant ()) |
74ac6d43 | 14150 | *offset = dwarf2_get_attr_constant_value (attr, 0); |
cd6c91b4 | 14151 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14152 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14153 | else if (attr->form_is_block ()) |
74ac6d43 TT |
14154 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
14155 | else | |
14156 | dwarf2_complex_location_expr_complaint (); | |
14157 | ||
14158 | return 1; | |
14159 | } | |
14160 | ||
14161 | return 0; | |
14162 | } | |
14163 | ||
c906108c SS |
14164 | /* Add an aggregate field to the field list. */ |
14165 | ||
14166 | static void | |
107d2387 | 14167 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14168 | struct dwarf2_cu *cu) |
6e70227d | 14169 | { |
518817b3 | 14170 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 14171 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14172 | struct nextfield *new_field; |
14173 | struct attribute *attr; | |
14174 | struct field *fp; | |
15d034d0 | 14175 | const char *fieldname = ""; |
c906108c | 14176 | |
7d0ccb61 DJ |
14177 | if (die->tag == DW_TAG_inheritance) |
14178 | { | |
be2daae6 TT |
14179 | fip->baseclasses.emplace_back (); |
14180 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14181 | } |
14182 | else | |
14183 | { | |
be2daae6 TT |
14184 | fip->fields.emplace_back (); |
14185 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14186 | } |
be2daae6 | 14187 | |
c906108c SS |
14188 | fip->nfields++; |
14189 | ||
e142c38c | 14190 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14191 | if (attr != nullptr) |
c906108c | 14192 | new_field->accessibility = DW_UNSND (attr); |
60d5a603 JK |
14193 | else |
14194 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14195 | if (new_field->accessibility != DW_ACCESS_public) |
14196 | fip->non_public_fields = 1; | |
60d5a603 | 14197 | |
e142c38c | 14198 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14199 | if (attr != nullptr) |
c906108c | 14200 | new_field->virtuality = DW_UNSND (attr); |
60d5a603 JK |
14201 | else |
14202 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14203 | |
14204 | fp = &new_field->field; | |
a9a9bd0f | 14205 | |
e142c38c | 14206 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14207 | { |
74ac6d43 TT |
14208 | LONGEST offset; |
14209 | ||
a9a9bd0f | 14210 | /* Data member other than a C++ static data member. */ |
6e70227d | 14211 | |
c906108c | 14212 | /* Get type of field. */ |
e7c27a73 | 14213 | fp->type = die_type (die, cu); |
c906108c | 14214 | |
d6a843b5 | 14215 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14216 | |
c906108c | 14217 | /* Get bit size of field (zero if none). */ |
e142c38c | 14218 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14219 | if (attr != nullptr) |
c906108c SS |
14220 | { |
14221 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
14222 | } | |
14223 | else | |
14224 | { | |
14225 | FIELD_BITSIZE (*fp) = 0; | |
14226 | } | |
14227 | ||
14228 | /* Get bit offset of field. */ | |
74ac6d43 TT |
14229 | if (handle_data_member_location (die, cu, &offset)) |
14230 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 14231 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
435d3d88 | 14232 | if (attr != nullptr) |
c906108c | 14233 | { |
d5a22e77 | 14234 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14235 | { |
14236 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
14237 | additional bit offset from the MSB of the containing |
14238 | anonymous object to the MSB of the field. We don't | |
14239 | have to do anything special since we don't need to | |
14240 | know the size of the anonymous object. */ | |
f41f5e61 | 14241 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
14242 | } |
14243 | else | |
14244 | { | |
14245 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
14246 | MSB of the anonymous object, subtract off the number of |
14247 | bits from the MSB of the field to the MSB of the | |
14248 | object, and then subtract off the number of bits of | |
14249 | the field itself. The result is the bit offset of | |
14250 | the LSB of the field. */ | |
c906108c SS |
14251 | int anonymous_size; |
14252 | int bit_offset = DW_UNSND (attr); | |
14253 | ||
e142c38c | 14254 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 14255 | if (attr != nullptr) |
c906108c SS |
14256 | { |
14257 | /* The size of the anonymous object containing | |
14258 | the bit field is explicit, so use the | |
14259 | indicated size (in bytes). */ | |
14260 | anonymous_size = DW_UNSND (attr); | |
14261 | } | |
14262 | else | |
14263 | { | |
14264 | /* The size of the anonymous object containing | |
14265 | the bit field must be inferred from the type | |
14266 | attribute of the data member containing the | |
14267 | bit field. */ | |
14268 | anonymous_size = TYPE_LENGTH (fp->type); | |
14269 | } | |
f41f5e61 PA |
14270 | SET_FIELD_BITPOS (*fp, |
14271 | (FIELD_BITPOS (*fp) | |
14272 | + anonymous_size * bits_per_byte | |
14273 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14274 | } |
14275 | } | |
da5b30da AA |
14276 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14277 | if (attr != NULL) | |
14278 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
14279 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
14280 | |
14281 | /* Get name of field. */ | |
39cbfefa DJ |
14282 | fieldname = dwarf2_name (die, cu); |
14283 | if (fieldname == NULL) | |
14284 | fieldname = ""; | |
d8151005 DJ |
14285 | |
14286 | /* The name is already allocated along with this objfile, so we don't | |
14287 | need to duplicate it for the type. */ | |
14288 | fp->name = fieldname; | |
c906108c SS |
14289 | |
14290 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 14291 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14292 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14293 | { |
d48cc9dd | 14294 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
14295 | new_field->accessibility = DW_ACCESS_private; |
14296 | fip->non_public_fields = 1; | |
14297 | } | |
14298 | } | |
a9a9bd0f | 14299 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14300 | { |
a9a9bd0f DC |
14301 | /* C++ static member. */ |
14302 | ||
14303 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14304 | is a declaration, but all versions of G++ as of this writing | |
14305 | (so through at least 3.2.1) incorrectly generate | |
14306 | DW_TAG_variable tags. */ | |
6e70227d | 14307 | |
ff355380 | 14308 | const char *physname; |
c906108c | 14309 | |
a9a9bd0f | 14310 | /* Get name of field. */ |
39cbfefa DJ |
14311 | fieldname = dwarf2_name (die, cu); |
14312 | if (fieldname == NULL) | |
c906108c SS |
14313 | return; |
14314 | ||
254e6b9e | 14315 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14316 | if (attr |
14317 | /* Only create a symbol if this is an external value. | |
14318 | new_symbol checks this and puts the value in the global symbol | |
14319 | table, which we want. If it is not external, new_symbol | |
14320 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14321 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14322 | { |
14323 | /* A static const member, not much different than an enum as far as | |
14324 | we're concerned, except that we can support more types. */ | |
14325 | new_symbol (die, NULL, cu); | |
14326 | } | |
14327 | ||
2df3850c | 14328 | /* Get physical name. */ |
ff355380 | 14329 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14330 | |
d8151005 DJ |
14331 | /* The name is already allocated along with this objfile, so we don't |
14332 | need to duplicate it for the type. */ | |
14333 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 14334 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 14335 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14336 | } |
14337 | else if (die->tag == DW_TAG_inheritance) | |
14338 | { | |
74ac6d43 | 14339 | LONGEST offset; |
d4b96c9a | 14340 | |
74ac6d43 TT |
14341 | /* C++ base class field. */ |
14342 | if (handle_data_member_location (die, cu, &offset)) | |
14343 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 14344 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 14345 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 14346 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 14347 | } |
2ddeaf8a TT |
14348 | else if (die->tag == DW_TAG_variant_part) |
14349 | { | |
14350 | /* process_structure_scope will treat this DIE as a union. */ | |
14351 | process_structure_scope (die, cu); | |
14352 | ||
14353 | /* The variant part is relative to the start of the enclosing | |
14354 | structure. */ | |
14355 | SET_FIELD_BITPOS (*fp, 0); | |
14356 | fp->type = get_die_type (die, cu); | |
14357 | fp->artificial = 1; | |
14358 | fp->name = "<<variant>>"; | |
c8c81635 TT |
14359 | |
14360 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
14361 | representation requires one, so set it to the maximum of the | |
489dbda6 TT |
14362 | child sizes, being sure to account for the offset at which |
14363 | each child is seen. */ | |
c8c81635 TT |
14364 | if (TYPE_LENGTH (fp->type) == 0) |
14365 | { | |
14366 | unsigned max = 0; | |
14367 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
489dbda6 TT |
14368 | { |
14369 | unsigned len = ((TYPE_FIELD_BITPOS (fp->type, i) + 7) / 8 | |
14370 | + TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i))); | |
14371 | if (len > max) | |
14372 | max = len; | |
14373 | } | |
c8c81635 TT |
14374 | TYPE_LENGTH (fp->type) = max; |
14375 | } | |
2ddeaf8a TT |
14376 | } |
14377 | else | |
14378 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14379 | } |
14380 | ||
883fd55a KS |
14381 | /* Can the type given by DIE define another type? */ |
14382 | ||
14383 | static bool | |
14384 | type_can_define_types (const struct die_info *die) | |
14385 | { | |
14386 | switch (die->tag) | |
14387 | { | |
14388 | case DW_TAG_typedef: | |
14389 | case DW_TAG_class_type: | |
14390 | case DW_TAG_structure_type: | |
14391 | case DW_TAG_union_type: | |
14392 | case DW_TAG_enumeration_type: | |
14393 | return true; | |
14394 | ||
14395 | default: | |
14396 | return false; | |
14397 | } | |
14398 | } | |
14399 | ||
14400 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14401 | |
14402 | static void | |
883fd55a KS |
14403 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14404 | struct dwarf2_cu *cu) | |
6e70227d | 14405 | { |
be2daae6 TT |
14406 | struct decl_field fp; |
14407 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14408 | |
883fd55a | 14409 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14410 | |
883fd55a | 14411 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14412 | fp.name = dwarf2_name (die, cu); |
14413 | fp.type = read_type_die (die, cu); | |
98751a41 | 14414 | |
c191a687 KS |
14415 | /* Save accessibility. */ |
14416 | enum dwarf_access_attribute accessibility; | |
14417 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14418 | if (attr != NULL) | |
14419 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14420 | else | |
14421 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14422 | switch (accessibility) | |
14423 | { | |
14424 | case DW_ACCESS_public: | |
14425 | /* The assumed value if neither private nor protected. */ | |
14426 | break; | |
14427 | case DW_ACCESS_private: | |
be2daae6 | 14428 | fp.is_private = 1; |
c191a687 KS |
14429 | break; |
14430 | case DW_ACCESS_protected: | |
be2daae6 | 14431 | fp.is_protected = 1; |
c191a687 KS |
14432 | break; |
14433 | default: | |
b98664d3 | 14434 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
14435 | } |
14436 | ||
883fd55a | 14437 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14438 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14439 | else |
be2daae6 | 14440 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14441 | } |
14442 | ||
c906108c SS |
14443 | /* Create the vector of fields, and attach it to the type. */ |
14444 | ||
14445 | static void | |
fba45db2 | 14446 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14447 | struct dwarf2_cu *cu) |
c906108c SS |
14448 | { |
14449 | int nfields = fip->nfields; | |
14450 | ||
14451 | /* Record the field count, allocate space for the array of fields, | |
14452 | and create blank accessibility bitfields if necessary. */ | |
14453 | TYPE_NFIELDS (type) = nfields; | |
14454 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 14455 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 14456 | |
b4ba55a1 | 14457 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14458 | { |
14459 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14460 | ||
14461 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14462 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14463 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14464 | ||
14465 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14466 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14467 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14468 | ||
774b6a14 TT |
14469 | TYPE_FIELD_IGNORE_BITS (type) = |
14470 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14471 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14472 | } |
14473 | ||
14474 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14475 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14476 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14477 | { |
be2daae6 | 14478 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14479 | unsigned char *pointer; |
c906108c SS |
14480 | |
14481 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14482 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14483 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14484 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14485 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14486 | } |
14487 | ||
2ddeaf8a TT |
14488 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
14489 | { | |
14490 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
14491 | ||
be2daae6 | 14492 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 14493 | { |
be2daae6 TT |
14494 | struct nextfield &field = fip->fields[index]; |
14495 | ||
14496 | if (field.variant.is_discriminant) | |
2ddeaf8a | 14497 | di->discriminant_index = index; |
be2daae6 | 14498 | else if (field.variant.default_branch) |
2ddeaf8a TT |
14499 | di->default_index = index; |
14500 | else | |
be2daae6 | 14501 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
14502 | } |
14503 | } | |
14504 | ||
be2daae6 TT |
14505 | /* Copy the saved-up fields into the field vector. */ |
14506 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14507 | { |
be2daae6 TT |
14508 | struct nextfield &field |
14509 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14510 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14511 | |
be2daae6 TT |
14512 | TYPE_FIELD (type, i) = field.field; |
14513 | switch (field.accessibility) | |
c906108c | 14514 | { |
c5aa993b | 14515 | case DW_ACCESS_private: |
b4ba55a1 | 14516 | if (cu->language != language_ada) |
be2daae6 | 14517 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14518 | break; |
c906108c | 14519 | |
c5aa993b | 14520 | case DW_ACCESS_protected: |
b4ba55a1 | 14521 | if (cu->language != language_ada) |
be2daae6 | 14522 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14523 | break; |
c906108c | 14524 | |
c5aa993b JM |
14525 | case DW_ACCESS_public: |
14526 | break; | |
c906108c | 14527 | |
c5aa993b JM |
14528 | default: |
14529 | /* Unknown accessibility. Complain and treat it as public. */ | |
14530 | { | |
b98664d3 | 14531 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14532 | field.accessibility); |
c5aa993b JM |
14533 | } |
14534 | break; | |
c906108c | 14535 | } |
be2daae6 | 14536 | if (i < fip->baseclasses.size ()) |
c906108c | 14537 | { |
be2daae6 | 14538 | switch (field.virtuality) |
c906108c | 14539 | { |
c5aa993b JM |
14540 | case DW_VIRTUALITY_virtual: |
14541 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14542 | if (cu->language == language_ada) |
a73c6dcd | 14543 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14544 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14545 | break; |
c906108c SS |
14546 | } |
14547 | } | |
c906108c SS |
14548 | } |
14549 | } | |
14550 | ||
7d27a96d TT |
14551 | /* Return true if this member function is a constructor, false |
14552 | otherwise. */ | |
14553 | ||
14554 | static int | |
14555 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14556 | { | |
14557 | const char *fieldname; | |
fe978cb0 | 14558 | const char *type_name; |
7d27a96d TT |
14559 | int len; |
14560 | ||
14561 | if (die->parent == NULL) | |
14562 | return 0; | |
14563 | ||
14564 | if (die->parent->tag != DW_TAG_structure_type | |
14565 | && die->parent->tag != DW_TAG_union_type | |
14566 | && die->parent->tag != DW_TAG_class_type) | |
14567 | return 0; | |
14568 | ||
14569 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14570 | type_name = dwarf2_name (die->parent, cu); |
14571 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14572 | return 0; |
14573 | ||
14574 | len = strlen (fieldname); | |
fe978cb0 PA |
14575 | return (strncmp (fieldname, type_name, len) == 0 |
14576 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14577 | } |
14578 | ||
e35000a7 TBA |
14579 | /* Check if the given VALUE is a recognized enum |
14580 | dwarf_defaulted_attribute constant according to DWARF5 spec, | |
14581 | Table 7.24. */ | |
14582 | ||
14583 | static bool | |
14584 | is_valid_DW_AT_defaulted (ULONGEST value) | |
14585 | { | |
14586 | switch (value) | |
14587 | { | |
14588 | case DW_DEFAULTED_no: | |
14589 | case DW_DEFAULTED_in_class: | |
14590 | case DW_DEFAULTED_out_of_class: | |
14591 | return true; | |
14592 | } | |
14593 | ||
3142e908 | 14594 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
e35000a7 TBA |
14595 | return false; |
14596 | } | |
14597 | ||
c906108c SS |
14598 | /* Add a member function to the proper fieldlist. */ |
14599 | ||
14600 | static void | |
107d2387 | 14601 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14602 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14603 | { |
518817b3 | 14604 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 14605 | struct attribute *attr; |
c906108c | 14606 | int i; |
be2daae6 | 14607 | struct fnfieldlist *flp = nullptr; |
c906108c | 14608 | struct fn_field *fnp; |
15d034d0 | 14609 | const char *fieldname; |
f792889a | 14610 | struct type *this_type; |
60d5a603 | 14611 | enum dwarf_access_attribute accessibility; |
c906108c | 14612 | |
b4ba55a1 | 14613 | if (cu->language == language_ada) |
a73c6dcd | 14614 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14615 | |
2df3850c | 14616 | /* Get name of member function. */ |
39cbfefa DJ |
14617 | fieldname = dwarf2_name (die, cu); |
14618 | if (fieldname == NULL) | |
2df3850c | 14619 | return; |
c906108c | 14620 | |
c906108c | 14621 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14622 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14623 | { |
27bfe10e | 14624 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14625 | { |
14626 | flp = &fip->fnfieldlists[i]; | |
14627 | break; | |
14628 | } | |
c906108c SS |
14629 | } |
14630 | ||
be2daae6 TT |
14631 | /* Create a new fnfieldlist if necessary. */ |
14632 | if (flp == nullptr) | |
c906108c | 14633 | { |
be2daae6 TT |
14634 | fip->fnfieldlists.emplace_back (); |
14635 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14636 | flp->name = fieldname; |
be2daae6 | 14637 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14638 | } |
14639 | ||
be2daae6 TT |
14640 | /* Create a new member function field and add it to the vector of |
14641 | fnfieldlists. */ | |
14642 | flp->fnfields.emplace_back (); | |
14643 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14644 | |
14645 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14646 | if (cu->language == language_cplus) |
be2daae6 TT |
14647 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
14648 | die, cu); | |
3da10d80 KS |
14649 | else |
14650 | { | |
1d06ead6 | 14651 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14652 | fnp->physname = physname ? physname : ""; |
14653 | } | |
14654 | ||
c906108c | 14655 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14656 | this_type = read_type_die (die, cu); |
14657 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14658 | { |
f792889a | 14659 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14660 | |
f792889a | 14661 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14662 | of the method itself (TYPE_CODE_METHOD). */ |
14663 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14664 | TYPE_TARGET_TYPE (this_type), |
14665 | TYPE_FIELDS (this_type), | |
14666 | TYPE_NFIELDS (this_type), | |
14667 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14668 | |
14669 | /* Handle static member functions. | |
c5aa993b | 14670 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14671 | member functions. G++ helps GDB by marking the first |
14672 | parameter for non-static member functions (which is the this | |
14673 | pointer) as artificial. We obtain this information from | |
14674 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14675 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14676 | fnp->voffset = VOFFSET_STATIC; |
14677 | } | |
14678 | else | |
b98664d3 | 14679 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 14680 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14681 | |
14682 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14683 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14684 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14685 | |
3e43a32a MS |
14686 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14687 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14688 | |
14689 | /* Get accessibility. */ | |
e142c38c | 14690 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14691 | if (attr != nullptr) |
aead7601 | 14692 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14693 | else |
14694 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14695 | switch (accessibility) | |
c906108c | 14696 | { |
60d5a603 JK |
14697 | case DW_ACCESS_private: |
14698 | fnp->is_private = 1; | |
14699 | break; | |
14700 | case DW_ACCESS_protected: | |
14701 | fnp->is_protected = 1; | |
14702 | break; | |
c906108c SS |
14703 | } |
14704 | ||
b02dede2 | 14705 | /* Check for artificial methods. */ |
e142c38c | 14706 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14707 | if (attr && DW_UNSND (attr) != 0) |
14708 | fnp->is_artificial = 1; | |
14709 | ||
e35000a7 TBA |
14710 | /* Check for defaulted methods. */ |
14711 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
14712 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) | |
14713 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); | |
14714 | ||
14715 | /* Check for deleted methods. */ | |
14716 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
14717 | if (attr != nullptr && DW_UNSND (attr) != 0) | |
14718 | fnp->is_deleted = 1; | |
14719 | ||
7d27a96d TT |
14720 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14721 | ||
0d564a31 | 14722 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14723 | function. For older versions of GCC, this is an offset in the |
14724 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14725 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14726 | to the object address. */ |
14727 | ||
e142c38c | 14728 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 14729 | if (attr != nullptr) |
8e19ed76 | 14730 | { |
4fc6c0d5 | 14731 | if (attr->form_is_block () && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14732 | { |
aec5aa8b TT |
14733 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14734 | { | |
14735 | /* Old-style GCC. */ | |
14736 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14737 | } | |
14738 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14739 | || (DW_BLOCK (attr)->size > 1 | |
14740 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14741 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14742 | { | |
aec5aa8b TT |
14743 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14744 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14745 | dwarf2_complex_location_expr_complaint (); | |
14746 | else | |
14747 | fnp->voffset /= cu->header.addr_size; | |
14748 | fnp->voffset += 2; | |
14749 | } | |
14750 | else | |
14751 | dwarf2_complex_location_expr_complaint (); | |
14752 | ||
14753 | if (!fnp->fcontext) | |
7e993ebf KS |
14754 | { |
14755 | /* If there is no `this' field and no DW_AT_containing_type, | |
14756 | we cannot actually find a base class context for the | |
14757 | vtable! */ | |
14758 | if (TYPE_NFIELDS (this_type) == 0 | |
14759 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14760 | { | |
b98664d3 | 14761 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
14762 | "function \"%s\" (offset %s)"), |
14763 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
14764 | } |
14765 | else | |
14766 | { | |
14767 | fnp->fcontext | |
14768 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14769 | } | |
14770 | } | |
aec5aa8b | 14771 | } |
cd6c91b4 | 14772 | else if (attr->form_is_section_offset ()) |
8e19ed76 | 14773 | { |
4d3c2250 | 14774 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14775 | } |
14776 | else | |
14777 | { | |
4d3c2250 KB |
14778 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14779 | fieldname); | |
8e19ed76 | 14780 | } |
0d564a31 | 14781 | } |
d48cc9dd DJ |
14782 | else |
14783 | { | |
14784 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14785 | if (attr && DW_UNSND (attr)) | |
14786 | { | |
14787 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 14788 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 14789 | "but the vtable offset is not specified"), |
9d8780f0 | 14790 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 14791 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14792 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14793 | } | |
14794 | } | |
c906108c SS |
14795 | } |
14796 | ||
14797 | /* Create the vector of member function fields, and attach it to the type. */ | |
14798 | ||
14799 | static void | |
fba45db2 | 14800 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14801 | struct dwarf2_cu *cu) |
c906108c | 14802 | { |
b4ba55a1 | 14803 | if (cu->language == language_ada) |
a73c6dcd | 14804 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14805 | |
c906108c SS |
14806 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14807 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
14808 | TYPE_ALLOC (type, |
14809 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 14810 | |
be2daae6 | 14811 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14812 | { |
be2daae6 | 14813 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 14814 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 14815 | |
be2daae6 TT |
14816 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
14817 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 14818 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
14819 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
14820 | ||
14821 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
14822 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
14823 | } |
14824 | ||
be2daae6 | 14825 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
14826 | } |
14827 | ||
1168df01 JB |
14828 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14829 | language, zero otherwise. */ | |
14830 | static int | |
14831 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14832 | { | |
14833 | static const char vptr[] = "_vptr"; | |
14834 | ||
9c37b5ae TT |
14835 | /* Look for the C++ form of the vtable. */ |
14836 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14837 | return 1; |
14838 | ||
14839 | return 0; | |
14840 | } | |
14841 | ||
c0dd20ea | 14842 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14843 | functions, with the ABI-specified layout. If TYPE describes |
14844 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14845 | |
14846 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14847 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14848 | |
0b92b5bb TT |
14849 | static void |
14850 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14851 | { |
09e2d7c7 | 14852 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14853 | |
14854 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14855 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14856 | return; | |
c0dd20ea DJ |
14857 | |
14858 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14859 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14860 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14861 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14862 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14863 | return; | |
c0dd20ea DJ |
14864 | |
14865 | /* Find the type of the method. */ | |
0b92b5bb | 14866 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14867 | if (pfn_type == NULL |
14868 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14869 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14870 | return; |
c0dd20ea DJ |
14871 | |
14872 | /* Look for the "this" argument. */ | |
14873 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14874 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14875 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14876 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14877 | return; |
c0dd20ea | 14878 | |
09e2d7c7 | 14879 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14880 | new_type = alloc_type (objfile); |
09e2d7c7 | 14881 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14882 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14883 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14884 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14885 | } |
1168df01 | 14886 | |
2b4424c3 TT |
14887 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
14888 | appropriate error checking and issuing complaints if there is a | |
14889 | problem. */ | |
14890 | ||
14891 | static ULONGEST | |
14892 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
14893 | { | |
14894 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
14895 | ||
14896 | if (attr == nullptr) | |
14897 | return 0; | |
14898 | ||
cd6c91b4 | 14899 | if (!attr->form_is_constant ()) |
2b4424c3 | 14900 | { |
b98664d3 | 14901 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
14902 | " - DIE at %s [in module %s]"), |
14903 | sect_offset_str (die->sect_off), | |
14904 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14905 | return 0; | |
14906 | } | |
14907 | ||
14908 | ULONGEST align; | |
14909 | if (attr->form == DW_FORM_sdata) | |
14910 | { | |
14911 | LONGEST val = DW_SND (attr); | |
14912 | if (val < 0) | |
14913 | { | |
b98664d3 | 14914 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
14915 | " - DIE at %s [in module %s]"), |
14916 | sect_offset_str (die->sect_off), | |
14917 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14918 | return 0; | |
14919 | } | |
14920 | align = val; | |
14921 | } | |
14922 | else | |
14923 | align = DW_UNSND (attr); | |
14924 | ||
14925 | if (align == 0) | |
14926 | { | |
b98664d3 | 14927 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
14928 | " - DIE at %s [in module %s]"), |
14929 | sect_offset_str (die->sect_off), | |
14930 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14931 | return 0; | |
14932 | } | |
14933 | if ((align & (align - 1)) != 0) | |
14934 | { | |
b98664d3 | 14935 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
14936 | " - DIE at %s [in module %s]"), |
14937 | sect_offset_str (die->sect_off), | |
14938 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14939 | return 0; | |
14940 | } | |
14941 | ||
14942 | return align; | |
14943 | } | |
14944 | ||
14945 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
14946 | the alignment for TYPE. */ | |
14947 | ||
14948 | static void | |
14949 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
14950 | struct type *type) | |
14951 | { | |
14952 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 14953 | complaint (_("DW_AT_alignment value too large" |
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 | } | |
685b1105 | 14958 | |
e35000a7 TBA |
14959 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14960 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
14961 | ||
14962 | static bool | |
14963 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
14964 | { | |
14965 | switch (value) | |
14966 | { | |
14967 | case DW_CC_normal: | |
14968 | case DW_CC_pass_by_reference: | |
14969 | case DW_CC_pass_by_value: | |
14970 | return true; | |
14971 | ||
14972 | default: | |
14973 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 14974 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
14975 | return false; |
14976 | } | |
14977 | } | |
14978 | ||
d0922fcf TBA |
14979 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14980 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
14981 | also according to GNU-specific values (see include/dwarf2.h). */ | |
14982 | ||
14983 | static bool | |
14984 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
14985 | { | |
14986 | switch (value) | |
14987 | { | |
14988 | case DW_CC_normal: | |
14989 | case DW_CC_program: | |
14990 | case DW_CC_nocall: | |
14991 | return true; | |
14992 | ||
14993 | case DW_CC_GNU_renesas_sh: | |
14994 | case DW_CC_GNU_borland_fastcall_i386: | |
14995 | case DW_CC_GDB_IBM_OpenCL: | |
14996 | return true; | |
14997 | ||
14998 | default: | |
14999 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15000 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15001 | return false; |
15002 | } | |
15003 | } | |
15004 | ||
c906108c | 15005 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15006 | (definition) to create a type for the structure or union. Fill in |
15007 | the type's name and general properties; the members will not be | |
83655187 DE |
15008 | processed until process_structure_scope. A symbol table entry for |
15009 | the type will also not be done until process_structure_scope (assuming | |
15010 | the type has a name). | |
c906108c | 15011 | |
c767944b DJ |
15012 | NOTE: we need to call these functions regardless of whether or not the |
15013 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15014 | structure or union. This gets the type entered into our set of |
83655187 | 15015 | user defined types. */ |
c906108c | 15016 | |
f792889a | 15017 | static struct type * |
134d01f1 | 15018 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15019 | { |
518817b3 | 15020 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15021 | struct type *type; |
15022 | struct attribute *attr; | |
15d034d0 | 15023 | const char *name; |
c906108c | 15024 | |
348e048f DE |
15025 | /* If the definition of this type lives in .debug_types, read that type. |
15026 | Don't follow DW_AT_specification though, that will take us back up | |
15027 | the chain and we want to go down. */ | |
45e58e77 | 15028 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15029 | if (attr != nullptr) |
348e048f | 15030 | { |
ac9ec31b | 15031 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15032 | |
ac9ec31b | 15033 | /* The type's CU may not be the same as CU. |
02142a6c | 15034 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15035 | return set_die_type (die, type, cu); |
15036 | } | |
15037 | ||
c0dd20ea | 15038 | type = alloc_type (objfile); |
c906108c | 15039 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15040 | |
39cbfefa DJ |
15041 | name = dwarf2_name (die, cu); |
15042 | if (name != NULL) | |
c906108c | 15043 | { |
987504bb | 15044 | if (cu->language == language_cplus |
c44af4eb TT |
15045 | || cu->language == language_d |
15046 | || cu->language == language_rust) | |
63d06c5c | 15047 | { |
15d034d0 | 15048 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15049 | |
15050 | /* dwarf2_full_name might have already finished building the DIE's | |
15051 | type. If so, there is no need to continue. */ | |
15052 | if (get_die_type (die, cu) != NULL) | |
15053 | return get_die_type (die, cu); | |
15054 | ||
e86ca25f | 15055 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15056 | } |
15057 | else | |
15058 | { | |
d8151005 DJ |
15059 | /* The name is already allocated along with this objfile, so |
15060 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15061 | TYPE_NAME (type) = name; |
63d06c5c | 15062 | } |
c906108c SS |
15063 | } |
15064 | ||
15065 | if (die->tag == DW_TAG_structure_type) | |
15066 | { | |
15067 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15068 | } | |
15069 | else if (die->tag == DW_TAG_union_type) | |
15070 | { | |
15071 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15072 | } | |
2ddeaf8a TT |
15073 | else if (die->tag == DW_TAG_variant_part) |
15074 | { | |
15075 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15076 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15077 | } | |
c906108c SS |
15078 | else |
15079 | { | |
4753d33b | 15080 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15081 | } |
15082 | ||
0cc2414c TT |
15083 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15084 | TYPE_DECLARED_CLASS (type) = 1; | |
15085 | ||
e35000a7 TBA |
15086 | /* Store the calling convention in the type if it's available in |
15087 | the die. Otherwise the calling convention remains set to | |
15088 | the default value DW_CC_normal. */ | |
15089 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15090 | if (attr != nullptr | |
15091 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) | |
15092 | { | |
15093 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15094 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
15095 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
15096 | } | |
15097 | ||
e142c38c | 15098 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15099 | if (attr != nullptr) |
c906108c | 15100 | { |
cd6c91b4 | 15101 | if (attr->form_is_constant ()) |
155bfbd3 JB |
15102 | TYPE_LENGTH (type) = DW_UNSND (attr); |
15103 | else | |
15104 | { | |
15105 | /* For the moment, dynamic type sizes are not supported | |
15106 | by GDB's struct type. The actual size is determined | |
15107 | on-demand when resolving the type of a given object, | |
15108 | so set the type's length to zero for now. Otherwise, | |
15109 | we record an expression as the length, and that expression | |
15110 | could lead to a very large value, which could eventually | |
15111 | lead to us trying to allocate that much memory when creating | |
15112 | a value of that type. */ | |
15113 | TYPE_LENGTH (type) = 0; | |
15114 | } | |
c906108c SS |
15115 | } |
15116 | else | |
15117 | { | |
15118 | TYPE_LENGTH (type) = 0; | |
15119 | } | |
15120 | ||
2b4424c3 TT |
15121 | maybe_set_alignment (cu, die, type); |
15122 | ||
5230b05a | 15123 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15124 | { |
5230b05a WT |
15125 | /* ICC<14 does not output the required DW_AT_declaration on |
15126 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15127 | TYPE_STUB (type) = 1; |
685b1105 JK |
15128 | } |
15129 | else | |
15130 | TYPE_STUB_SUPPORTED (type) = 1; | |
15131 | ||
dc718098 | 15132 | if (die_is_declaration (die, cu)) |
876cecd0 | 15133 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15134 | else if (attr == NULL && die->child == NULL |
15135 | && producer_is_realview (cu->producer)) | |
15136 | /* RealView does not output the required DW_AT_declaration | |
15137 | on incomplete types. */ | |
15138 | TYPE_STUB (type) = 1; | |
dc718098 | 15139 | |
c906108c SS |
15140 | /* We need to add the type field to the die immediately so we don't |
15141 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15142 | type within the structure itself. */ |
1c379e20 | 15143 | set_die_type (die, type, cu); |
c906108c | 15144 | |
7e314c57 JK |
15145 | /* set_die_type should be already done. */ |
15146 | set_descriptive_type (type, die, cu); | |
15147 | ||
c767944b DJ |
15148 | return type; |
15149 | } | |
15150 | ||
2ddeaf8a TT |
15151 | /* A helper for process_structure_scope that handles a single member |
15152 | DIE. */ | |
15153 | ||
15154 | static void | |
15155 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15156 | struct field_info *fi, | |
15157 | std::vector<struct symbol *> *template_args, | |
15158 | struct dwarf2_cu *cu) | |
15159 | { | |
15160 | if (child_die->tag == DW_TAG_member | |
15161 | || child_die->tag == DW_TAG_variable | |
15162 | || child_die->tag == DW_TAG_variant_part) | |
15163 | { | |
15164 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15165 | should be a DW_TAG_member that is a declaration, but | |
15166 | all versions of G++ as of this writing (so through at | |
15167 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15168 | tags for them instead. */ | |
15169 | dwarf2_add_field (fi, child_die, cu); | |
15170 | } | |
15171 | else if (child_die->tag == DW_TAG_subprogram) | |
15172 | { | |
15173 | /* Rust doesn't have member functions in the C++ sense. | |
15174 | However, it does emit ordinary functions as children | |
15175 | of a struct DIE. */ | |
15176 | if (cu->language == language_rust) | |
15177 | read_func_scope (child_die, cu); | |
15178 | else | |
15179 | { | |
15180 | /* C++ member function. */ | |
15181 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15182 | } | |
15183 | } | |
15184 | else if (child_die->tag == DW_TAG_inheritance) | |
15185 | { | |
15186 | /* C++ base class field. */ | |
15187 | dwarf2_add_field (fi, child_die, cu); | |
15188 | } | |
15189 | else if (type_can_define_types (child_die)) | |
15190 | dwarf2_add_type_defn (fi, child_die, cu); | |
15191 | else if (child_die->tag == DW_TAG_template_type_param | |
15192 | || child_die->tag == DW_TAG_template_value_param) | |
15193 | { | |
15194 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15195 | ||
15196 | if (arg != NULL) | |
15197 | template_args->push_back (arg); | |
15198 | } | |
15199 | else if (child_die->tag == DW_TAG_variant) | |
15200 | { | |
15201 | /* In a variant we want to get the discriminant and also add a | |
15202 | field for our sole member child. */ | |
15203 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15204 | ||
bde09ab7 | 15205 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
15206 | variant_child != NULL; |
15207 | variant_child = sibling_die (variant_child)) | |
15208 | { | |
15209 | if (variant_child->tag == DW_TAG_member) | |
15210 | { | |
15211 | handle_struct_member_die (variant_child, type, fi, | |
15212 | template_args, cu); | |
15213 | /* Only handle the one. */ | |
15214 | break; | |
15215 | } | |
15216 | } | |
15217 | ||
15218 | /* We don't handle this but we might as well report it if we see | |
15219 | it. */ | |
15220 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15221 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15222 | " - DIE at %s [in module %s]"), |
15223 | sect_offset_str (child_die->sect_off), | |
15224 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15225 | ||
15226 | /* The first field was just added, so we can stash the | |
15227 | discriminant there. */ | |
be2daae6 | 15228 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15229 | if (discr == NULL) |
be2daae6 | 15230 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15231 | else |
be2daae6 | 15232 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
15233 | } |
15234 | } | |
15235 | ||
c767944b DJ |
15236 | /* Finish creating a structure or union type, including filling in |
15237 | its members and creating a symbol for it. */ | |
15238 | ||
15239 | static void | |
15240 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15241 | { | |
518817b3 | 15242 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15243 | struct die_info *child_die; |
c767944b DJ |
15244 | struct type *type; |
15245 | ||
15246 | type = get_die_type (die, cu); | |
15247 | if (type == NULL) | |
15248 | type = read_structure_type (die, cu); | |
15249 | ||
2ddeaf8a TT |
15250 | /* When reading a DW_TAG_variant_part, we need to notice when we |
15251 | read the discriminant member, so we can record it later in the | |
15252 | discriminant_info. */ | |
15253 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
feee869b | 15254 | sect_offset discr_offset {}; |
3e1d3d8c | 15255 | bool has_template_parameters = false; |
2ddeaf8a TT |
15256 | |
15257 | if (is_variant_part) | |
15258 | { | |
15259 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15260 | if (discr == NULL) | |
15261 | { | |
15262 | /* Maybe it's a univariant form, an extension we support. | |
15263 | In this case arrange not to check the offset. */ | |
15264 | is_variant_part = false; | |
15265 | } | |
cd6c91b4 | 15266 | else if (discr->form_is_ref ()) |
2ddeaf8a TT |
15267 | { |
15268 | struct dwarf2_cu *target_cu = cu; | |
15269 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15270 | ||
15271 | discr_offset = target_die->sect_off; | |
15272 | } | |
15273 | else | |
15274 | { | |
b98664d3 | 15275 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
15276 | " - DIE at %s [in module %s]"), |
15277 | sect_offset_str (die->sect_off), | |
15278 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15279 | is_variant_part = false; | |
15280 | } | |
15281 | } | |
15282 | ||
e142c38c | 15283 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15284 | { |
15285 | struct field_info fi; | |
2f4732b0 | 15286 | std::vector<struct symbol *> template_args; |
c906108c | 15287 | |
639d11d3 | 15288 | child_die = die->child; |
c906108c SS |
15289 | |
15290 | while (child_die && child_die->tag) | |
15291 | { | |
2ddeaf8a | 15292 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 15293 | |
2ddeaf8a | 15294 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 15295 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 15296 | |
c906108c SS |
15297 | child_die = sibling_die (child_die); |
15298 | } | |
15299 | ||
34eaf542 | 15300 | /* Attach template arguments to type. */ |
2f4732b0 | 15301 | if (!template_args.empty ()) |
34eaf542 | 15302 | { |
3e1d3d8c | 15303 | has_template_parameters = true; |
34eaf542 | 15304 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15305 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15306 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15307 | = XOBNEWVEC (&objfile->objfile_obstack, |
15308 | struct symbol *, | |
15309 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15310 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15311 | template_args.data (), |
34eaf542 TT |
15312 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15313 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15314 | } |
15315 | ||
c906108c SS |
15316 | /* Attach fields and member functions to the type. */ |
15317 | if (fi.nfields) | |
e7c27a73 | 15318 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15319 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15320 | { |
e7c27a73 | 15321 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15322 | |
c5aa993b | 15323 | /* Get the type which refers to the base class (possibly this |
c906108c | 15324 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15325 | class from the DW_AT_containing_type attribute. This use of |
15326 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15327 | |
e142c38c | 15328 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15329 | { |
e7c27a73 | 15330 | struct type *t = die_containing_type (die, cu); |
c906108c | 15331 | |
ae6ae975 | 15332 | set_type_vptr_basetype (type, t); |
c906108c SS |
15333 | if (type == t) |
15334 | { | |
c906108c SS |
15335 | int i; |
15336 | ||
15337 | /* Our own class provides vtbl ptr. */ | |
15338 | for (i = TYPE_NFIELDS (t) - 1; | |
15339 | i >= TYPE_N_BASECLASSES (t); | |
15340 | --i) | |
15341 | { | |
0d5cff50 | 15342 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15343 | |
1168df01 | 15344 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15345 | { |
ae6ae975 | 15346 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15347 | break; |
15348 | } | |
15349 | } | |
15350 | ||
15351 | /* Complain if virtual function table field not found. */ | |
15352 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15353 | complaint (_("virtual function table pointer " |
3e43a32a | 15354 | "not found when defining class '%s'"), |
e86ca25f | 15355 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
15356 | } |
15357 | else | |
15358 | { | |
ae6ae975 | 15359 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15360 | } |
15361 | } | |
f6235d4c | 15362 | else if (cu->producer |
61012eef | 15363 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15364 | { |
15365 | /* The IBM XLC compiler does not provide direct indication | |
15366 | of the containing type, but the vtable pointer is | |
15367 | always named __vfp. */ | |
15368 | ||
15369 | int i; | |
15370 | ||
15371 | for (i = TYPE_NFIELDS (type) - 1; | |
15372 | i >= TYPE_N_BASECLASSES (type); | |
15373 | --i) | |
15374 | { | |
15375 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15376 | { | |
ae6ae975 DE |
15377 | set_type_vptr_fieldno (type, i); |
15378 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15379 | break; |
15380 | } | |
15381 | } | |
15382 | } | |
c906108c | 15383 | } |
98751a41 JK |
15384 | |
15385 | /* Copy fi.typedef_field_list linked list elements content into the | |
15386 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15387 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15388 | { |
be2daae6 | 15389 | int count = fi.typedef_field_list.size (); |
98751a41 | 15390 | |
a0d7a4ff | 15391 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15392 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15393 | = ((struct decl_field *) |
be2daae6 TT |
15394 | TYPE_ALLOC (type, |
15395 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15396 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15397 | |
be2daae6 TT |
15398 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15399 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15400 | } |
c767944b | 15401 | |
883fd55a KS |
15402 | /* Copy fi.nested_types_list linked list elements content into the |
15403 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15404 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15405 | { |
be2daae6 | 15406 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15407 | |
15408 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15409 | TYPE_NESTED_TYPES_ARRAY (type) | |
15410 | = ((struct decl_field *) | |
be2daae6 TT |
15411 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15412 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15413 | |
be2daae6 TT |
15414 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15415 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15416 | } |
c906108c | 15417 | } |
63d06c5c | 15418 | |
bb5ed363 | 15419 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15420 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15421 | cu->rust_unions.push_back (type); | |
0b92b5bb | 15422 | |
90aeadfc DC |
15423 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15424 | snapshots) has been known to create a die giving a declaration | |
15425 | for a class that has, as a child, a die giving a definition for a | |
15426 | nested class. So we have to process our children even if the | |
15427 | current die is a declaration. Normally, of course, a declaration | |
15428 | won't have any children at all. */ | |
134d01f1 | 15429 | |
ca040673 DE |
15430 | child_die = die->child; |
15431 | ||
90aeadfc DC |
15432 | while (child_die != NULL && child_die->tag) |
15433 | { | |
15434 | if (child_die->tag == DW_TAG_member | |
15435 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15436 | || child_die->tag == DW_TAG_inheritance |
15437 | || child_die->tag == DW_TAG_template_value_param | |
15438 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15439 | { |
90aeadfc | 15440 | /* Do nothing. */ |
134d01f1 | 15441 | } |
90aeadfc DC |
15442 | else |
15443 | process_die (child_die, cu); | |
134d01f1 | 15444 | |
90aeadfc | 15445 | child_die = sibling_die (child_die); |
134d01f1 DJ |
15446 | } |
15447 | ||
fa4028e9 JB |
15448 | /* Do not consider external references. According to the DWARF standard, |
15449 | these DIEs are identified by the fact that they have no byte_size | |
15450 | attribute, and a declaration attribute. */ | |
15451 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15452 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
15453 | { |
15454 | struct symbol *sym = new_symbol (die, type, cu); | |
15455 | ||
15456 | if (has_template_parameters) | |
15457 | { | |
a776957c TT |
15458 | struct symtab *symtab; |
15459 | if (sym != nullptr) | |
15460 | symtab = symbol_symtab (sym); | |
15461 | else if (cu->line_header != nullptr) | |
15462 | { | |
15463 | /* Any related symtab will do. */ | |
15464 | symtab | |
7ba99d21 | 15465 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15466 | } |
15467 | else | |
15468 | { | |
15469 | symtab = nullptr; | |
15470 | complaint (_("could not find suitable " | |
15471 | "symtab for template parameter" | |
15472 | " - DIE at %s [in module %s]"), | |
15473 | sect_offset_str (die->sect_off), | |
15474 | objfile_name (objfile)); | |
15475 | } | |
15476 | ||
15477 | if (symtab != nullptr) | |
15478 | { | |
15479 | /* Make sure that the symtab is set on the new symbols. | |
15480 | Even though they don't appear in this symtab directly, | |
15481 | other parts of gdb assume that symbols do, and this is | |
15482 | reasonably true. */ | |
15483 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15484 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15485 | } | |
3e1d3d8c TT |
15486 | } |
15487 | } | |
134d01f1 DJ |
15488 | } |
15489 | ||
55426c9d JB |
15490 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
15491 | update TYPE using some information only available in DIE's children. */ | |
15492 | ||
15493 | static void | |
15494 | update_enumeration_type_from_children (struct die_info *die, | |
15495 | struct type *type, | |
15496 | struct dwarf2_cu *cu) | |
15497 | { | |
60f7655a | 15498 | struct die_info *child_die; |
55426c9d JB |
15499 | int unsigned_enum = 1; |
15500 | int flag_enum = 1; | |
55426c9d | 15501 | |
8268c778 | 15502 | auto_obstack obstack; |
55426c9d | 15503 | |
60f7655a DE |
15504 | for (child_die = die->child; |
15505 | child_die != NULL && child_die->tag; | |
15506 | child_die = sibling_die (child_die)) | |
55426c9d JB |
15507 | { |
15508 | struct attribute *attr; | |
15509 | LONGEST value; | |
15510 | const gdb_byte *bytes; | |
15511 | struct dwarf2_locexpr_baton *baton; | |
15512 | const char *name; | |
60f7655a | 15513 | |
55426c9d JB |
15514 | if (child_die->tag != DW_TAG_enumerator) |
15515 | continue; | |
15516 | ||
15517 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
15518 | if (attr == NULL) | |
15519 | continue; | |
15520 | ||
15521 | name = dwarf2_name (child_die, cu); | |
15522 | if (name == NULL) | |
15523 | name = "<anonymous enumerator>"; | |
15524 | ||
15525 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
15526 | &value, &bytes, &baton); | |
15527 | if (value < 0) | |
15528 | { | |
15529 | unsigned_enum = 0; | |
15530 | flag_enum = 0; | |
15531 | } | |
55426c9d | 15532 | else |
edd45eb0 SM |
15533 | { |
15534 | if (count_one_bits_ll (value) >= 2) | |
15535 | flag_enum = 0; | |
edd45eb0 | 15536 | } |
55426c9d JB |
15537 | |
15538 | /* If we already know that the enum type is neither unsigned, nor | |
15539 | a flag type, no need to look at the rest of the enumerates. */ | |
15540 | if (!unsigned_enum && !flag_enum) | |
15541 | break; | |
55426c9d JB |
15542 | } |
15543 | ||
15544 | if (unsigned_enum) | |
15545 | TYPE_UNSIGNED (type) = 1; | |
15546 | if (flag_enum) | |
15547 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
15548 | } |
15549 | ||
134d01f1 DJ |
15550 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
15551 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 15552 | |
f792889a | 15553 | static struct type * |
134d01f1 | 15554 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15555 | { |
518817b3 | 15556 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15557 | struct type *type; |
c906108c | 15558 | struct attribute *attr; |
0114d602 | 15559 | const char *name; |
134d01f1 | 15560 | |
348e048f DE |
15561 | /* If the definition of this type lives in .debug_types, read that type. |
15562 | Don't follow DW_AT_specification though, that will take us back up | |
15563 | the chain and we want to go down. */ | |
45e58e77 | 15564 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15565 | if (attr != nullptr) |
348e048f | 15566 | { |
ac9ec31b | 15567 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15568 | |
ac9ec31b | 15569 | /* The type's CU may not be the same as CU. |
02142a6c | 15570 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15571 | return set_die_type (die, type, cu); |
15572 | } | |
15573 | ||
c906108c SS |
15574 | type = alloc_type (objfile); |
15575 | ||
15576 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 15577 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 15578 | if (name != NULL) |
e86ca25f | 15579 | TYPE_NAME (type) = name; |
c906108c | 15580 | |
0626fc76 TT |
15581 | attr = dwarf2_attr (die, DW_AT_type, cu); |
15582 | if (attr != NULL) | |
15583 | { | |
15584 | struct type *underlying_type = die_type (die, cu); | |
15585 | ||
15586 | TYPE_TARGET_TYPE (type) = underlying_type; | |
15587 | } | |
15588 | ||
e142c38c | 15589 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15590 | if (attr != nullptr) |
c906108c SS |
15591 | { |
15592 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15593 | } | |
15594 | else | |
15595 | { | |
15596 | TYPE_LENGTH (type) = 0; | |
15597 | } | |
15598 | ||
2b4424c3 TT |
15599 | maybe_set_alignment (cu, die, type); |
15600 | ||
137033e9 JB |
15601 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
15602 | declared as private in the package spec, and then defined only | |
15603 | inside the package body. Such types are known as Taft Amendment | |
15604 | Types. When another package uses such a type, an incomplete DIE | |
15605 | may be generated by the compiler. */ | |
02eb380e | 15606 | if (die_is_declaration (die, cu)) |
876cecd0 | 15607 | TYPE_STUB (type) = 1; |
02eb380e | 15608 | |
0626fc76 TT |
15609 | /* Finish the creation of this type by using the enum's children. |
15610 | We must call this even when the underlying type has been provided | |
15611 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
15612 | update_enumeration_type_from_children (die, type, cu); |
15613 | ||
0626fc76 TT |
15614 | /* If this type has an underlying type that is not a stub, then we |
15615 | may use its attributes. We always use the "unsigned" attribute | |
15616 | in this situation, because ordinarily we guess whether the type | |
15617 | is unsigned -- but the guess can be wrong and the underlying type | |
15618 | can tell us the reality. However, we defer to a local size | |
15619 | attribute if one exists, because this lets the compiler override | |
15620 | the underlying type if needed. */ | |
15621 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
15622 | { | |
15623 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
15624 | if (TYPE_LENGTH (type) == 0) | |
15625 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
15626 | if (TYPE_RAW_ALIGN (type) == 0 |
15627 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
15628 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
15629 | } |
15630 | ||
3d567982 TT |
15631 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
15632 | ||
f792889a | 15633 | return set_die_type (die, type, cu); |
134d01f1 DJ |
15634 | } |
15635 | ||
15636 | /* Given a pointer to a die which begins an enumeration, process all | |
15637 | the dies that define the members of the enumeration, and create the | |
15638 | symbol for the enumeration type. | |
15639 | ||
15640 | NOTE: We reverse the order of the element list. */ | |
15641 | ||
15642 | static void | |
15643 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15644 | { | |
f792889a | 15645 | struct type *this_type; |
134d01f1 | 15646 | |
f792889a DJ |
15647 | this_type = get_die_type (die, cu); |
15648 | if (this_type == NULL) | |
15649 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 15650 | |
639d11d3 | 15651 | if (die->child != NULL) |
c906108c | 15652 | { |
9dc481d3 DE |
15653 | struct die_info *child_die; |
15654 | struct symbol *sym; | |
43816ebc | 15655 | std::vector<struct field> fields; |
15d034d0 | 15656 | const char *name; |
9dc481d3 | 15657 | |
639d11d3 | 15658 | child_die = die->child; |
c906108c SS |
15659 | while (child_die && child_die->tag) |
15660 | { | |
15661 | if (child_die->tag != DW_TAG_enumerator) | |
15662 | { | |
e7c27a73 | 15663 | process_die (child_die, cu); |
c906108c SS |
15664 | } |
15665 | else | |
15666 | { | |
39cbfefa DJ |
15667 | name = dwarf2_name (child_die, cu); |
15668 | if (name) | |
c906108c | 15669 | { |
f792889a | 15670 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 15671 | |
43816ebc TT |
15672 | fields.emplace_back (); |
15673 | struct field &field = fields.back (); | |
c906108c | 15674 | |
43816ebc TT |
15675 | FIELD_NAME (field) = sym->linkage_name (); |
15676 | FIELD_TYPE (field) = NULL; | |
15677 | SET_FIELD_ENUMVAL (field, SYMBOL_VALUE (sym)); | |
15678 | FIELD_BITSIZE (field) = 0; | |
c906108c SS |
15679 | } |
15680 | } | |
15681 | ||
15682 | child_die = sibling_die (child_die); | |
15683 | } | |
15684 | ||
43816ebc | 15685 | if (!fields.empty ()) |
c906108c | 15686 | { |
43816ebc | 15687 | TYPE_NFIELDS (this_type) = fields.size (); |
f792889a | 15688 | TYPE_FIELDS (this_type) = (struct field *) |
43816ebc TT |
15689 | TYPE_ALLOC (this_type, sizeof (struct field) * fields.size ()); |
15690 | memcpy (TYPE_FIELDS (this_type), fields.data (), | |
15691 | sizeof (struct field) * fields.size ()); | |
c906108c | 15692 | } |
c906108c | 15693 | } |
134d01f1 | 15694 | |
6c83ed52 TT |
15695 | /* If we are reading an enum from a .debug_types unit, and the enum |
15696 | is a declaration, and the enum is not the signatured type in the | |
15697 | unit, then we do not want to add a symbol for it. Adding a | |
15698 | symbol would in some cases obscure the true definition of the | |
15699 | enum, giving users an incomplete type when the definition is | |
15700 | actually available. Note that we do not want to do this for all | |
15701 | enums which are just declarations, because C++0x allows forward | |
15702 | enum declarations. */ | |
3019eac3 | 15703 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15704 | && die_is_declaration (die, cu)) |
15705 | { | |
52dc124a | 15706 | struct signatured_type *sig_type; |
6c83ed52 | 15707 | |
c0f78cd4 | 15708 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15709 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15710 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15711 | return; |
15712 | } | |
15713 | ||
f792889a | 15714 | new_symbol (die, this_type, cu); |
c906108c SS |
15715 | } |
15716 | ||
15717 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15718 | the DIE's type field. For now, this only handles one dimensional | |
15719 | arrays. */ | |
15720 | ||
f792889a | 15721 | static struct type * |
e7c27a73 | 15722 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15723 | { |
518817b3 | 15724 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15725 | struct die_info *child_die; |
7e314c57 | 15726 | struct type *type; |
c906108c | 15727 | struct type *element_type, *range_type, *index_type; |
c906108c | 15728 | struct attribute *attr; |
15d034d0 | 15729 | const char *name; |
a405673c | 15730 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 15731 | unsigned int bit_stride = 0; |
c906108c | 15732 | |
e7c27a73 | 15733 | element_type = die_type (die, cu); |
c906108c | 15734 | |
7e314c57 JK |
15735 | /* The die_type call above may have already set the type for this DIE. */ |
15736 | type = get_die_type (die, cu); | |
15737 | if (type) | |
15738 | return type; | |
15739 | ||
dc53a7ad JB |
15740 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15741 | if (attr != NULL) | |
a405673c JB |
15742 | { |
15743 | int stride_ok; | |
09ba997f | 15744 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
a405673c JB |
15745 | |
15746 | byte_stride_prop | |
15747 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
15748 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
15749 | prop_type); | |
a405673c JB |
15750 | if (!stride_ok) |
15751 | { | |
b98664d3 | 15752 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
15753 | " - DIE at %s [in module %s]"), |
15754 | sect_offset_str (die->sect_off), | |
518817b3 | 15755 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
15756 | /* Ignore this attribute. We will likely not be able to print |
15757 | arrays of this type correctly, but there is little we can do | |
15758 | to help if we cannot read the attribute's value. */ | |
15759 | byte_stride_prop = NULL; | |
15760 | } | |
15761 | } | |
dc53a7ad JB |
15762 | |
15763 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15764 | if (attr != NULL) | |
15765 | bit_stride = DW_UNSND (attr); | |
15766 | ||
c906108c SS |
15767 | /* Irix 6.2 native cc creates array types without children for |
15768 | arrays with unspecified length. */ | |
639d11d3 | 15769 | if (die->child == NULL) |
c906108c | 15770 | { |
46bf5051 | 15771 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15772 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 15773 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 15774 | byte_stride_prop, bit_stride); |
f792889a | 15775 | return set_die_type (die, type, cu); |
c906108c SS |
15776 | } |
15777 | ||
791afaa2 | 15778 | std::vector<struct type *> range_types; |
639d11d3 | 15779 | child_die = die->child; |
c906108c SS |
15780 | while (child_die && child_die->tag) |
15781 | { | |
15782 | if (child_die->tag == DW_TAG_subrange_type) | |
15783 | { | |
f792889a | 15784 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15785 | |
f792889a | 15786 | if (child_type != NULL) |
a02abb62 | 15787 | { |
0963b4bd MS |
15788 | /* The range type was succesfully read. Save it for the |
15789 | array type creation. */ | |
791afaa2 | 15790 | range_types.push_back (child_type); |
a02abb62 | 15791 | } |
c906108c SS |
15792 | } |
15793 | child_die = sibling_die (child_die); | |
15794 | } | |
15795 | ||
15796 | /* Dwarf2 dimensions are output from left to right, create the | |
15797 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15798 | |
c906108c | 15799 | type = element_type; |
7ca2d3a3 DL |
15800 | |
15801 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15802 | { | |
15803 | int i = 0; | |
9a619af0 | 15804 | |
791afaa2 | 15805 | while (i < range_types.size ()) |
dc53a7ad | 15806 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 15807 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
15808 | } |
15809 | else | |
15810 | { | |
791afaa2 | 15811 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15812 | while (ndim-- > 0) |
dc53a7ad | 15813 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 15814 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 15815 | } |
c906108c | 15816 | |
f5f8a009 EZ |
15817 | /* Understand Dwarf2 support for vector types (like they occur on |
15818 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15819 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15820 | custom vendor extension. The main difference between a regular | |
15821 | array and the vector variant is that vectors are passed by value | |
15822 | to functions. */ | |
e142c38c | 15823 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 15824 | if (attr != nullptr) |
ea37ba09 | 15825 | make_vector_type (type); |
f5f8a009 | 15826 | |
dbc98a8b KW |
15827 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15828 | implementation may choose to implement triple vectors using this | |
15829 | attribute. */ | |
15830 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15831 | if (attr != nullptr) |
dbc98a8b KW |
15832 | { |
15833 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15834 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15835 | else | |
b98664d3 | 15836 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 15837 | "than the total size of elements")); |
dbc98a8b KW |
15838 | } |
15839 | ||
39cbfefa DJ |
15840 | name = dwarf2_name (die, cu); |
15841 | if (name) | |
15842 | TYPE_NAME (type) = name; | |
6e70227d | 15843 | |
2b4424c3 TT |
15844 | maybe_set_alignment (cu, die, type); |
15845 | ||
0963b4bd | 15846 | /* Install the type in the die. */ |
7e314c57 JK |
15847 | set_die_type (die, type, cu); |
15848 | ||
15849 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15850 | set_descriptive_type (type, die, cu); |
15851 | ||
7e314c57 | 15852 | return type; |
c906108c SS |
15853 | } |
15854 | ||
7ca2d3a3 | 15855 | static enum dwarf_array_dim_ordering |
6e70227d | 15856 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15857 | { |
15858 | struct attribute *attr; | |
15859 | ||
15860 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15861 | ||
435d3d88 | 15862 | if (attr != nullptr) |
aead7601 | 15863 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
7ca2d3a3 | 15864 | |
0963b4bd MS |
15865 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15866 | opposite order to the dwarf2 specification, but data is still | |
15867 | laid out as per normal fortran. | |
7ca2d3a3 | 15868 | |
0963b4bd MS |
15869 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15870 | version checking. */ | |
7ca2d3a3 | 15871 | |
905e0470 PM |
15872 | if (cu->language == language_fortran |
15873 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15874 | { |
15875 | return DW_ORD_row_major; | |
15876 | } | |
15877 | ||
6e70227d | 15878 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15879 | { |
15880 | case array_column_major: | |
15881 | return DW_ORD_col_major; | |
15882 | case array_row_major: | |
15883 | default: | |
15884 | return DW_ORD_row_major; | |
15885 | }; | |
15886 | } | |
15887 | ||
72019c9c | 15888 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15889 | the DIE's type field. */ |
72019c9c | 15890 | |
f792889a | 15891 | static struct type * |
72019c9c GM |
15892 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15893 | { | |
7e314c57 JK |
15894 | struct type *domain_type, *set_type; |
15895 | struct attribute *attr; | |
f792889a | 15896 | |
7e314c57 JK |
15897 | domain_type = die_type (die, cu); |
15898 | ||
15899 | /* The die_type call above may have already set the type for this DIE. */ | |
15900 | set_type = get_die_type (die, cu); | |
15901 | if (set_type) | |
15902 | return set_type; | |
15903 | ||
15904 | set_type = create_set_type (NULL, domain_type); | |
15905 | ||
15906 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15907 | if (attr != nullptr) |
d09039dd | 15908 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
7e314c57 | 15909 | |
2b4424c3 TT |
15910 | maybe_set_alignment (cu, die, set_type); |
15911 | ||
f792889a | 15912 | return set_die_type (die, set_type, cu); |
72019c9c | 15913 | } |
7ca2d3a3 | 15914 | |
0971de02 TT |
15915 | /* A helper for read_common_block that creates a locexpr baton. |
15916 | SYM is the symbol which we are marking as computed. | |
15917 | COMMON_DIE is the DIE for the common block. | |
15918 | COMMON_LOC is the location expression attribute for the common | |
15919 | block itself. | |
15920 | MEMBER_LOC is the location expression attribute for the particular | |
15921 | member of the common block that we are processing. | |
15922 | CU is the CU from which the above come. */ | |
15923 | ||
15924 | static void | |
15925 | mark_common_block_symbol_computed (struct symbol *sym, | |
15926 | struct die_info *common_die, | |
15927 | struct attribute *common_loc, | |
15928 | struct attribute *member_loc, | |
15929 | struct dwarf2_cu *cu) | |
15930 | { | |
518817b3 SM |
15931 | struct dwarf2_per_objfile *dwarf2_per_objfile |
15932 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
15933 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
15934 | struct dwarf2_locexpr_baton *baton; | |
15935 | gdb_byte *ptr; | |
15936 | unsigned int cu_off; | |
15937 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15938 | LONGEST offset = 0; | |
15939 | ||
15940 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
15941 | gdb_assert (common_loc->form_is_block ()); |
15942 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 15943 | || member_loc->form_is_constant ()); |
0971de02 | 15944 | |
8d749320 | 15945 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15946 | baton->per_cu = cu->per_cu; |
15947 | gdb_assert (baton->per_cu); | |
15948 | ||
15949 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15950 | ||
cd6c91b4 | 15951 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15952 | { |
15953 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15954 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15955 | } | |
15956 | else | |
15957 | baton->size += DW_BLOCK (member_loc)->size; | |
15958 | ||
224c3ddb | 15959 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15960 | baton->data = ptr; |
15961 | ||
15962 | *ptr++ = DW_OP_call4; | |
9c541725 | 15963 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15964 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15965 | ptr += 4; | |
15966 | ||
cd6c91b4 | 15967 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15968 | { |
15969 | *ptr++ = DW_OP_addr; | |
15970 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15971 | ptr += cu->header.addr_size; | |
15972 | } | |
15973 | else | |
15974 | { | |
15975 | /* We have to copy the data here, because DW_OP_call4 will only | |
15976 | use a DW_AT_location attribute. */ | |
15977 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15978 | ptr += DW_BLOCK (member_loc)->size; | |
15979 | } | |
15980 | ||
15981 | *ptr++ = DW_OP_plus; | |
15982 | gdb_assert (ptr - baton->data == baton->size); | |
15983 | ||
0971de02 | 15984 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 15985 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
15986 | } |
15987 | ||
4357ac6c TT |
15988 | /* Create appropriate locally-scoped variables for all the |
15989 | DW_TAG_common_block entries. Also create a struct common_block | |
15990 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 15991 | is used to separate the common blocks name namespace from regular |
4357ac6c | 15992 | variable names. */ |
c906108c SS |
15993 | |
15994 | static void | |
e7c27a73 | 15995 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15996 | { |
0971de02 TT |
15997 | struct attribute *attr; |
15998 | ||
15999 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16000 | if (attr != nullptr) |
0971de02 TT |
16001 | { |
16002 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16003 | if (attr->form_is_block ()) |
0971de02 TT |
16004 | { |
16005 | /* Ok. */ | |
16006 | } | |
cd6c91b4 | 16007 | else if (attr->form_is_section_offset ()) |
0971de02 TT |
16008 | { |
16009 | dwarf2_complex_location_expr_complaint (); | |
16010 | attr = NULL; | |
16011 | } | |
16012 | else | |
16013 | { | |
16014 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16015 | "common block member"); | |
16016 | attr = NULL; | |
16017 | } | |
16018 | } | |
16019 | ||
639d11d3 | 16020 | if (die->child != NULL) |
c906108c | 16021 | { |
518817b3 | 16022 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16023 | struct die_info *child_die; |
16024 | size_t n_entries = 0, size; | |
16025 | struct common_block *common_block; | |
16026 | struct symbol *sym; | |
74ac6d43 | 16027 | |
4357ac6c TT |
16028 | for (child_die = die->child; |
16029 | child_die && child_die->tag; | |
16030 | child_die = sibling_die (child_die)) | |
16031 | ++n_entries; | |
16032 | ||
16033 | size = (sizeof (struct common_block) | |
16034 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16035 | common_block |
16036 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16037 | size); | |
4357ac6c TT |
16038 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16039 | common_block->n_entries = 0; | |
16040 | ||
16041 | for (child_die = die->child; | |
16042 | child_die && child_die->tag; | |
16043 | child_die = sibling_die (child_die)) | |
16044 | { | |
16045 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16046 | symbol scope. */ | |
e7c27a73 | 16047 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16048 | if (sym != NULL) |
16049 | { | |
16050 | struct attribute *member_loc; | |
16051 | ||
16052 | common_block->contents[common_block->n_entries++] = sym; | |
16053 | ||
16054 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16055 | cu); | |
16056 | if (member_loc) | |
16057 | { | |
16058 | /* GDB has handled this for a long time, but it is | |
16059 | not specified by DWARF. It seems to have been | |
16060 | emitted by gfortran at least as recently as: | |
16061 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16062 | complaint (_("Variable in common block has " |
0971de02 | 16063 | "DW_AT_data_member_location " |
9d8780f0 SM |
16064 | "- DIE at %s [in module %s]"), |
16065 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16066 | objfile_name (objfile)); |
0971de02 | 16067 | |
cd6c91b4 | 16068 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16069 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16070 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16071 | || member_loc->form_is_block ()) |
0971de02 | 16072 | { |
435d3d88 | 16073 | if (attr != nullptr) |
0971de02 TT |
16074 | mark_common_block_symbol_computed (sym, die, attr, |
16075 | member_loc, cu); | |
16076 | } | |
16077 | else | |
16078 | dwarf2_complex_location_expr_complaint (); | |
16079 | } | |
16080 | } | |
c906108c | 16081 | } |
4357ac6c TT |
16082 | |
16083 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16084 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16085 | } |
16086 | } | |
16087 | ||
0114d602 | 16088 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16089 | |
0114d602 DJ |
16090 | static struct type * |
16091 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16092 | { |
518817b3 | 16093 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16094 | const char *previous_prefix, *name; |
9219021c | 16095 | int is_anonymous; |
0114d602 DJ |
16096 | struct type *type; |
16097 | ||
16098 | /* For extensions, reuse the type of the original namespace. */ | |
16099 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16100 | { | |
16101 | struct die_info *ext_die; | |
16102 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16103 | |
0114d602 DJ |
16104 | ext_die = dwarf2_extension (die, &ext_cu); |
16105 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16106 | |
16107 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16108 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16109 | return set_die_type (die, type, cu); |
16110 | } | |
9219021c | 16111 | |
e142c38c | 16112 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16113 | |
16114 | /* Now build the name of the current namespace. */ | |
16115 | ||
0114d602 DJ |
16116 | previous_prefix = determine_prefix (die, cu); |
16117 | if (previous_prefix[0] != '\0') | |
16118 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16119 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16120 | |
16121 | /* Create the type. */ | |
19f392bc | 16122 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16123 | |
60531b24 | 16124 | return set_die_type (die, type, cu); |
0114d602 DJ |
16125 | } |
16126 | ||
22cee43f | 16127 | /* Read a namespace scope. */ |
0114d602 DJ |
16128 | |
16129 | static void | |
16130 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16131 | { | |
518817b3 | 16132 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16133 | int is_anonymous; |
9219021c | 16134 | |
5c4e30ca DC |
16135 | /* Add a symbol associated to this if we haven't seen the namespace |
16136 | before. Also, add a using directive if it's an anonymous | |
16137 | namespace. */ | |
9219021c | 16138 | |
f2f0e013 | 16139 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16140 | { |
16141 | struct type *type; | |
16142 | ||
0114d602 | 16143 | type = read_type_die (die, cu); |
e7c27a73 | 16144 | new_symbol (die, type, cu); |
5c4e30ca | 16145 | |
e8e80198 | 16146 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16147 | if (is_anonymous) |
0114d602 DJ |
16148 | { |
16149 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16150 | |
eb1e02fd | 16151 | std::vector<const char *> excludes; |
804d2729 | 16152 | add_using_directive (using_directives (cu), |
22cee43f | 16153 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16154 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16155 | } |
5c4e30ca | 16156 | } |
9219021c | 16157 | |
639d11d3 | 16158 | if (die->child != NULL) |
d9fa45fe | 16159 | { |
639d11d3 | 16160 | struct die_info *child_die = die->child; |
6e70227d | 16161 | |
d9fa45fe DC |
16162 | while (child_die && child_die->tag) |
16163 | { | |
e7c27a73 | 16164 | process_die (child_die, cu); |
d9fa45fe DC |
16165 | child_die = sibling_die (child_die); |
16166 | } | |
16167 | } | |
38d518c9 EZ |
16168 | } |
16169 | ||
f55ee35c JK |
16170 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16171 | imported module. Still we need that type as local Fortran "use ... only" | |
16172 | declaration imports depend on the created type in determine_prefix. */ | |
16173 | ||
16174 | static struct type * | |
16175 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16176 | { | |
518817b3 | 16177 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16178 | const char *module_name; |
f55ee35c JK |
16179 | struct type *type; |
16180 | ||
16181 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16182 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16183 | |
f55ee35c JK |
16184 | return set_die_type (die, type, cu); |
16185 | } | |
16186 | ||
5d7cb8df JK |
16187 | /* Read a Fortran module. */ |
16188 | ||
16189 | static void | |
16190 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16191 | { | |
16192 | struct die_info *child_die = die->child; | |
530e8392 KB |
16193 | struct type *type; |
16194 | ||
16195 | type = read_type_die (die, cu); | |
16196 | new_symbol (die, type, cu); | |
5d7cb8df | 16197 | |
5d7cb8df JK |
16198 | while (child_die && child_die->tag) |
16199 | { | |
16200 | process_die (child_die, cu); | |
16201 | child_die = sibling_die (child_die); | |
16202 | } | |
16203 | } | |
16204 | ||
38d518c9 EZ |
16205 | /* Return the name of the namespace represented by DIE. Set |
16206 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16207 | namespace. */ | |
16208 | ||
16209 | static const char * | |
e142c38c | 16210 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16211 | { |
16212 | struct die_info *current_die; | |
16213 | const char *name = NULL; | |
16214 | ||
16215 | /* Loop through the extensions until we find a name. */ | |
16216 | ||
16217 | for (current_die = die; | |
16218 | current_die != NULL; | |
f2f0e013 | 16219 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16220 | { |
96553a0c DE |
16221 | /* We don't use dwarf2_name here so that we can detect the absence |
16222 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16223 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16224 | |
38d518c9 EZ |
16225 | if (name != NULL) |
16226 | break; | |
16227 | } | |
16228 | ||
16229 | /* Is it an anonymous namespace? */ | |
16230 | ||
16231 | *is_anonymous = (name == NULL); | |
16232 | if (*is_anonymous) | |
2b1dbab0 | 16233 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16234 | |
16235 | return name; | |
d9fa45fe DC |
16236 | } |
16237 | ||
c906108c SS |
16238 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16239 | the user defined type vector. */ | |
16240 | ||
f792889a | 16241 | static struct type * |
e7c27a73 | 16242 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16243 | { |
518817b3 SM |
16244 | struct gdbarch *gdbarch |
16245 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 16246 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16247 | struct type *type; |
8b2dbe47 KB |
16248 | struct attribute *attr_byte_size; |
16249 | struct attribute *attr_address_class; | |
16250 | int byte_size, addr_class; | |
7e314c57 JK |
16251 | struct type *target_type; |
16252 | ||
16253 | target_type = die_type (die, cu); | |
c906108c | 16254 | |
7e314c57 JK |
16255 | /* The die_type call above may have already set the type for this DIE. */ |
16256 | type = get_die_type (die, cu); | |
16257 | if (type) | |
16258 | return type; | |
16259 | ||
16260 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16261 | |
e142c38c | 16262 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16263 | if (attr_byte_size) |
16264 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16265 | else |
8b2dbe47 KB |
16266 | byte_size = cu_header->addr_size; |
16267 | ||
e142c38c | 16268 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16269 | if (attr_address_class) |
16270 | addr_class = DW_UNSND (attr_address_class); | |
16271 | else | |
16272 | addr_class = DW_ADDR_none; | |
16273 | ||
2b4424c3 TT |
16274 | ULONGEST alignment = get_alignment (cu, die); |
16275 | ||
16276 | /* If the pointer size, alignment, or address class is different | |
16277 | than the default, create a type variant marked as such and set | |
16278 | the length accordingly. */ | |
16279 | if (TYPE_LENGTH (type) != byte_size | |
16280 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16281 | && alignment != TYPE_RAW_ALIGN (type)) | |
16282 | || addr_class != DW_ADDR_none) | |
c906108c | 16283 | { |
5e2b427d | 16284 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16285 | { |
16286 | int type_flags; | |
16287 | ||
849957d9 | 16288 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16289 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16290 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16291 | == 0); | |
8b2dbe47 KB |
16292 | type = make_type_with_address_space (type, type_flags); |
16293 | } | |
16294 | else if (TYPE_LENGTH (type) != byte_size) | |
16295 | { | |
b98664d3 | 16296 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 16297 | } |
2b4424c3 TT |
16298 | else if (TYPE_RAW_ALIGN (type) != alignment) |
16299 | { | |
b98664d3 | 16300 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
16301 | " - DIE at %s [in module %s]"), |
16302 | sect_offset_str (die->sect_off), | |
16303 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16304 | } | |
6e70227d | 16305 | else |
9a619af0 MS |
16306 | { |
16307 | /* Should we also complain about unhandled address classes? */ | |
16308 | } | |
c906108c | 16309 | } |
8b2dbe47 KB |
16310 | |
16311 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 16312 | set_type_align (type, alignment); |
f792889a | 16313 | return set_die_type (die, type, cu); |
c906108c SS |
16314 | } |
16315 | ||
16316 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16317 | the user defined type vector. */ | |
16318 | ||
f792889a | 16319 | static struct type * |
e7c27a73 | 16320 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16321 | { |
16322 | struct type *type; | |
16323 | struct type *to_type; | |
16324 | struct type *domain; | |
16325 | ||
e7c27a73 DJ |
16326 | to_type = die_type (die, cu); |
16327 | domain = die_containing_type (die, cu); | |
0d5de010 | 16328 | |
7e314c57 JK |
16329 | /* The calls above may have already set the type for this DIE. */ |
16330 | type = get_die_type (die, cu); | |
16331 | if (type) | |
16332 | return type; | |
16333 | ||
0d5de010 DJ |
16334 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
16335 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
16336 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
16337 | { | |
518817b3 SM |
16338 | struct type *new_type |
16339 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
16340 | |
16341 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16342 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16343 | TYPE_VARARGS (to_type)); | |
16344 | type = lookup_methodptr_type (new_type); | |
16345 | } | |
0d5de010 DJ |
16346 | else |
16347 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16348 | |
f792889a | 16349 | return set_die_type (die, type, cu); |
c906108c SS |
16350 | } |
16351 | ||
4297a3f0 | 16352 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16353 | the user defined type vector. */ |
16354 | ||
f792889a | 16355 | static struct type * |
4297a3f0 AV |
16356 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16357 | enum type_code refcode) | |
c906108c | 16358 | { |
e7c27a73 | 16359 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16360 | struct type *type, *target_type; |
c906108c SS |
16361 | struct attribute *attr; |
16362 | ||
4297a3f0 AV |
16363 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16364 | ||
7e314c57 JK |
16365 | target_type = die_type (die, cu); |
16366 | ||
16367 | /* The die_type call above may have already set the type for this DIE. */ | |
16368 | type = get_die_type (die, cu); | |
16369 | if (type) | |
16370 | return type; | |
16371 | ||
4297a3f0 | 16372 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16373 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16374 | if (attr != nullptr) |
c906108c SS |
16375 | { |
16376 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16377 | } | |
16378 | else | |
16379 | { | |
107d2387 | 16380 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16381 | } |
2b4424c3 | 16382 | maybe_set_alignment (cu, die, type); |
f792889a | 16383 | return set_die_type (die, type, cu); |
c906108c SS |
16384 | } |
16385 | ||
cf363f18 MW |
16386 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16387 | outputs DWARF type qualifiers that apply to an array, not the | |
16388 | element type. But GDB relies on the array element type to carry | |
16389 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16390 | specification. */ | |
16391 | ||
16392 | static struct type * | |
16393 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16394 | struct type *base_type, int cnst, int voltl) | |
16395 | { | |
16396 | struct type *el_type, *inner_array; | |
16397 | ||
16398 | base_type = copy_type (base_type); | |
16399 | inner_array = base_type; | |
16400 | ||
16401 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
16402 | { | |
16403 | TYPE_TARGET_TYPE (inner_array) = | |
16404 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16405 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16406 | } | |
16407 | ||
16408 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16409 | cnst |= TYPE_CONST (el_type); | |
16410 | voltl |= TYPE_VOLATILE (el_type); | |
16411 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16412 | ||
16413 | return set_die_type (die, base_type, cu); | |
16414 | } | |
16415 | ||
f792889a | 16416 | static struct type * |
e7c27a73 | 16417 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16418 | { |
f792889a | 16419 | struct type *base_type, *cv_type; |
c906108c | 16420 | |
e7c27a73 | 16421 | base_type = die_type (die, cu); |
7e314c57 JK |
16422 | |
16423 | /* The die_type call above may have already set the type for this DIE. */ | |
16424 | cv_type = get_die_type (die, cu); | |
16425 | if (cv_type) | |
16426 | return cv_type; | |
16427 | ||
2f608a3a KW |
16428 | /* In case the const qualifier is applied to an array type, the element type |
16429 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
16430 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 16431 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 16432 | |
f792889a DJ |
16433 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
16434 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16435 | } |
16436 | ||
f792889a | 16437 | static struct type * |
e7c27a73 | 16438 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16439 | { |
f792889a | 16440 | struct type *base_type, *cv_type; |
c906108c | 16441 | |
e7c27a73 | 16442 | base_type = die_type (die, cu); |
7e314c57 JK |
16443 | |
16444 | /* The die_type call above may have already set the type for this DIE. */ | |
16445 | cv_type = get_die_type (die, cu); | |
16446 | if (cv_type) | |
16447 | return cv_type; | |
16448 | ||
cf363f18 MW |
16449 | /* In case the volatile qualifier is applied to an array type, the |
16450 | element type is so qualified, not the array type (section 6.7.3 | |
16451 | of C99). */ | |
16452 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
16453 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
16454 | ||
f792889a DJ |
16455 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
16456 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16457 | } |
16458 | ||
06d66ee9 TT |
16459 | /* Handle DW_TAG_restrict_type. */ |
16460 | ||
16461 | static struct type * | |
16462 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
16463 | { | |
16464 | struct type *base_type, *cv_type; | |
16465 | ||
16466 | base_type = die_type (die, cu); | |
16467 | ||
16468 | /* The die_type call above may have already set the type for this DIE. */ | |
16469 | cv_type = get_die_type (die, cu); | |
16470 | if (cv_type) | |
16471 | return cv_type; | |
16472 | ||
16473 | cv_type = make_restrict_type (base_type); | |
16474 | return set_die_type (die, cv_type, cu); | |
16475 | } | |
16476 | ||
a2c2acaf MW |
16477 | /* Handle DW_TAG_atomic_type. */ |
16478 | ||
16479 | static struct type * | |
16480 | read_tag_atomic_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_atomic_type (base_type); | |
16492 | return set_die_type (die, cv_type, cu); | |
16493 | } | |
16494 | ||
c906108c SS |
16495 | /* Extract all information from a DW_TAG_string_type DIE and add to |
16496 | the user defined type vector. It isn't really a user defined type, | |
16497 | but it behaves like one, with other DIE's using an AT_user_def_type | |
16498 | attribute to reference it. */ | |
16499 | ||
f792889a | 16500 | static struct type * |
e7c27a73 | 16501 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16502 | { |
518817b3 | 16503 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 16504 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
16505 | struct type *type, *range_type, *index_type, *char_type; |
16506 | struct attribute *attr; | |
216a7e6b AB |
16507 | struct dynamic_prop prop; |
16508 | bool length_is_constant = true; | |
16509 | LONGEST length; | |
16510 | ||
16511 | /* There are a couple of places where bit sizes might be made use of | |
16512 | when parsing a DW_TAG_string_type, however, no producer that we know | |
16513 | of make use of these. Handling bit sizes that are a multiple of the | |
16514 | byte size is easy enough, but what about other bit sizes? Lets deal | |
16515 | with that problem when we have to. Warn about these attributes being | |
16516 | unsupported, then parse the type and ignore them like we always | |
16517 | have. */ | |
16518 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
16519 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
16520 | { | |
16521 | static bool warning_printed = false; | |
16522 | if (!warning_printed) | |
16523 | { | |
16524 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
16525 | "currently supported on DW_TAG_string_type.")); | |
16526 | warning_printed = true; | |
16527 | } | |
16528 | } | |
c906108c | 16529 | |
e142c38c | 16530 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 16531 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
16532 | { |
16533 | /* The string length describes the location at which the length of | |
16534 | the string can be found. The size of the length field can be | |
16535 | specified with one of the attributes below. */ | |
16536 | struct type *prop_type; | |
16537 | struct attribute *len | |
16538 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
16539 | if (len == nullptr) | |
16540 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 16541 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
16542 | { |
16543 | /* Pass 0 as the default as we know this attribute is constant | |
16544 | and the default value will not be returned. */ | |
16545 | LONGEST sz = dwarf2_get_attr_constant_value (len, 0); | |
09ba997f | 16546 | prop_type = cu->per_cu->int_type (sz, true); |
216a7e6b AB |
16547 | } |
16548 | else | |
16549 | { | |
16550 | /* If the size is not specified then we assume it is the size of | |
16551 | an address on this target. */ | |
09ba997f | 16552 | prop_type = cu->per_cu->addr_sized_int_type (true); |
216a7e6b AB |
16553 | } |
16554 | ||
16555 | /* Convert the attribute into a dynamic property. */ | |
16556 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
16557 | length = 1; | |
16558 | else | |
16559 | length_is_constant = false; | |
16560 | } | |
16561 | else if (attr != nullptr) | |
16562 | { | |
16563 | /* This DW_AT_string_length just contains the length with no | |
16564 | indirection. There's no need to create a dynamic property in this | |
16565 | case. Pass 0 for the default value as we know it will not be | |
16566 | returned in this case. */ | |
16567 | length = dwarf2_get_attr_constant_value (attr, 0); | |
16568 | } | |
16569 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 16570 | { |
216a7e6b AB |
16571 | /* We don't currently support non-constant byte sizes for strings. */ |
16572 | length = dwarf2_get_attr_constant_value (attr, 1); | |
c906108c SS |
16573 | } |
16574 | else | |
16575 | { | |
216a7e6b AB |
16576 | /* Use 1 as a fallback length if we have nothing else. */ |
16577 | length = 1; | |
c906108c | 16578 | } |
6ccb9162 | 16579 | |
46bf5051 | 16580 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
16581 | if (length_is_constant) |
16582 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
16583 | else | |
16584 | { | |
16585 | struct dynamic_prop low_bound; | |
16586 | ||
16587 | low_bound.kind = PROP_CONST; | |
16588 | low_bound.data.const_val = 1; | |
16589 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); | |
16590 | } | |
3b7538c0 UW |
16591 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
16592 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 16593 | |
f792889a | 16594 | return set_die_type (die, type, cu); |
c906108c SS |
16595 | } |
16596 | ||
4d804846 JB |
16597 | /* Assuming that DIE corresponds to a function, returns nonzero |
16598 | if the function is prototyped. */ | |
16599 | ||
16600 | static int | |
16601 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
16602 | { | |
16603 | struct attribute *attr; | |
16604 | ||
16605 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
16606 | if (attr && (DW_UNSND (attr) != 0)) | |
16607 | return 1; | |
16608 | ||
16609 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 16610 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
16611 | languages that allow unprototyped functions (Eg: Objective C). |
16612 | For all other languages, assume that functions are always | |
16613 | prototyped. */ | |
16614 | if (cu->language != language_c | |
16615 | && cu->language != language_objc | |
16616 | && cu->language != language_opencl) | |
16617 | return 1; | |
16618 | ||
16619 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
16620 | prototyped and unprototyped functions; default to prototyped, | |
16621 | since that is more common in modern code (and RealView warns | |
16622 | about unprototyped functions). */ | |
16623 | if (producer_is_realview (cu->producer)) | |
16624 | return 1; | |
16625 | ||
16626 | return 0; | |
16627 | } | |
16628 | ||
c906108c SS |
16629 | /* Handle DIES due to C code like: |
16630 | ||
16631 | struct foo | |
c5aa993b JM |
16632 | { |
16633 | int (*funcp)(int a, long l); | |
16634 | int b; | |
16635 | }; | |
c906108c | 16636 | |
0963b4bd | 16637 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 16638 | |
f792889a | 16639 | static struct type * |
e7c27a73 | 16640 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16641 | { |
518817b3 | 16642 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
16643 | struct type *type; /* Type that this function returns. */ |
16644 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
16645 | struct attribute *attr; |
16646 | ||
e7c27a73 | 16647 | type = die_type (die, cu); |
7e314c57 JK |
16648 | |
16649 | /* The die_type call above may have already set the type for this DIE. */ | |
16650 | ftype = get_die_type (die, cu); | |
16651 | if (ftype) | |
16652 | return ftype; | |
16653 | ||
0c8b41f1 | 16654 | ftype = lookup_function_type (type); |
c906108c | 16655 | |
4d804846 | 16656 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 16657 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 16658 | |
c055b101 CV |
16659 | /* Store the calling convention in the type if it's available in |
16660 | the subroutine die. Otherwise set the calling convention to | |
16661 | the default value DW_CC_normal. */ | |
16662 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf TBA |
16663 | if (attr != nullptr |
16664 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) | |
16665 | TYPE_CALLING_CONVENTION (ftype) | |
16666 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
54fcddd0 UW |
16667 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
16668 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
16669 | else | |
16670 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 16671 | |
743649fd MW |
16672 | /* Record whether the function returns normally to its caller or not |
16673 | if the DWARF producer set that information. */ | |
16674 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
16675 | if (attr && (DW_UNSND (attr) != 0)) | |
16676 | TYPE_NO_RETURN (ftype) = 1; | |
16677 | ||
76c10ea2 GM |
16678 | /* We need to add the subroutine type to the die immediately so |
16679 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 16680 | declared as the same subroutine type. */ |
76c10ea2 | 16681 | set_die_type (die, ftype, cu); |
6e70227d | 16682 | |
639d11d3 | 16683 | if (die->child != NULL) |
c906108c | 16684 | { |
bb5ed363 | 16685 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 16686 | struct die_info *child_die; |
8072405b | 16687 | int nparams, iparams; |
c906108c SS |
16688 | |
16689 | /* Count the number of parameters. | |
16690 | FIXME: GDB currently ignores vararg functions, but knows about | |
16691 | vararg member functions. */ | |
8072405b | 16692 | nparams = 0; |
639d11d3 | 16693 | child_die = die->child; |
c906108c SS |
16694 | while (child_die && child_die->tag) |
16695 | { | |
16696 | if (child_die->tag == DW_TAG_formal_parameter) | |
16697 | nparams++; | |
16698 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 16699 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
16700 | child_die = sibling_die (child_die); |
16701 | } | |
16702 | ||
16703 | /* Allocate storage for parameters and fill them in. */ | |
16704 | TYPE_NFIELDS (ftype) = nparams; | |
16705 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 16706 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 16707 | |
8072405b JK |
16708 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
16709 | even if we error out during the parameters reading below. */ | |
16710 | for (iparams = 0; iparams < nparams; iparams++) | |
16711 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
16712 | ||
16713 | iparams = 0; | |
639d11d3 | 16714 | child_die = die->child; |
c906108c SS |
16715 | while (child_die && child_die->tag) |
16716 | { | |
16717 | if (child_die->tag == DW_TAG_formal_parameter) | |
16718 | { | |
3ce3b1ba PA |
16719 | struct type *arg_type; |
16720 | ||
16721 | /* DWARF version 2 has no clean way to discern C++ | |
16722 | static and non-static member functions. G++ helps | |
16723 | GDB by marking the first parameter for non-static | |
16724 | member functions (which is the this pointer) as | |
16725 | artificial. We pass this information to | |
16726 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
16727 | ||
16728 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
16729 | 4.5 does not yet generate. */ | |
e142c38c | 16730 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 16731 | if (attr != nullptr) |
c906108c SS |
16732 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
16733 | else | |
9c37b5ae | 16734 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
16735 | arg_type = die_type (child_die, cu); |
16736 | ||
16737 | /* RealView does not mark THIS as const, which the testsuite | |
16738 | expects. GCC marks THIS as const in method definitions, | |
16739 | but not in the class specifications (GCC PR 43053). */ | |
16740 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
16741 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
16742 | { | |
16743 | int is_this = 0; | |
16744 | struct dwarf2_cu *arg_cu = cu; | |
16745 | const char *name = dwarf2_name (child_die, cu); | |
16746 | ||
16747 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 16748 | if (attr != nullptr) |
3ce3b1ba PA |
16749 | { |
16750 | /* If the compiler emits this, use it. */ | |
16751 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
16752 | is_this = 1; | |
16753 | } | |
16754 | else if (name && strcmp (name, "this") == 0) | |
16755 | /* Function definitions will have the argument names. */ | |
16756 | is_this = 1; | |
16757 | else if (name == NULL && iparams == 0) | |
16758 | /* Declarations may not have the names, so like | |
16759 | elsewhere in GDB, assume an artificial first | |
16760 | argument is "this". */ | |
16761 | is_this = 1; | |
16762 | ||
16763 | if (is_this) | |
16764 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
16765 | arg_type, 0); | |
16766 | } | |
16767 | ||
16768 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
16769 | iparams++; |
16770 | } | |
16771 | child_die = sibling_die (child_die); | |
16772 | } | |
16773 | } | |
16774 | ||
76c10ea2 | 16775 | return ftype; |
c906108c SS |
16776 | } |
16777 | ||
f792889a | 16778 | static struct type * |
e7c27a73 | 16779 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16780 | { |
518817b3 | 16781 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16782 | const char *name = NULL; |
3c8e0968 | 16783 | struct type *this_type, *target_type; |
c906108c | 16784 | |
94af9270 | 16785 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16786 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16787 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16788 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16789 | target_type = die_type (die, cu); |
16790 | if (target_type != this_type) | |
16791 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16792 | else | |
16793 | { | |
16794 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16795 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 16796 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
16797 | "- DIE at %s [in module %s]"), |
16798 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
16799 | TYPE_TARGET_TYPE (this_type) = NULL; |
16800 | } | |
f792889a | 16801 | return this_type; |
c906108c SS |
16802 | } |
16803 | ||
9b790ce7 UW |
16804 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16805 | (which may be different from NAME) to the architecture back-end to allow | |
16806 | it to guess the correct format if necessary. */ | |
16807 | ||
16808 | static struct type * | |
16809 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 16810 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 UW |
16811 | { |
16812 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16813 | const struct floatformat **format; | |
16814 | struct type *type; | |
16815 | ||
16816 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16817 | if (format) | |
103a685e | 16818 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 16819 | else |
77b7c781 | 16820 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16821 | |
16822 | return type; | |
16823 | } | |
16824 | ||
eb77c9df AB |
16825 | /* Allocate an integer type of size BITS and name NAME. */ |
16826 | ||
16827 | static struct type * | |
16828 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
16829 | int bits, int unsigned_p, const char *name) | |
16830 | { | |
16831 | struct type *type; | |
16832 | ||
16833 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
16834 | instead of using DW_TAG_unspecified_type. This has been seen on | |
16835 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
16836 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
16837 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
16838 | type = objfile_type (objfile)->builtin_void; |
16839 | else | |
16840 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
16841 | ||
16842 | return type; | |
16843 | } | |
16844 | ||
8bdc1658 AB |
16845 | /* Initialise and return a floating point type of size BITS suitable for |
16846 | use as a component of a complex number. The NAME_HINT is passed through | |
16847 | when initialising the floating point type and is the name of the complex | |
16848 | type. | |
16849 | ||
16850 | As DWARF doesn't currently provide an explicit name for the components | |
16851 | of a complex number, but it can be helpful to have these components | |
16852 | named, we try to select a suitable name based on the size of the | |
16853 | component. */ | |
16854 | static struct type * | |
16855 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
16856 | struct objfile *objfile, | |
103a685e TT |
16857 | int bits, const char *name_hint, |
16858 | enum bfd_endian byte_order) | |
8bdc1658 AB |
16859 | { |
16860 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
16861 | struct type *tt = nullptr; | |
16862 | ||
35add35e AB |
16863 | /* Try to find a suitable floating point builtin type of size BITS. |
16864 | We're going to use the name of this type as the name for the complex | |
16865 | target type that we are about to create. */ | |
1db455a7 | 16866 | switch (cu->language) |
8bdc1658 | 16867 | { |
1db455a7 AB |
16868 | case language_fortran: |
16869 | switch (bits) | |
16870 | { | |
16871 | case 32: | |
16872 | tt = builtin_f_type (gdbarch)->builtin_real; | |
16873 | break; | |
16874 | case 64: | |
16875 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
16876 | break; | |
16877 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16878 | case 128: | |
16879 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
16880 | break; | |
16881 | } | |
8bdc1658 | 16882 | break; |
1db455a7 AB |
16883 | default: |
16884 | switch (bits) | |
16885 | { | |
16886 | case 32: | |
16887 | tt = builtin_type (gdbarch)->builtin_float; | |
16888 | break; | |
16889 | case 64: | |
16890 | tt = builtin_type (gdbarch)->builtin_double; | |
16891 | break; | |
16892 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16893 | case 128: | |
16894 | tt = builtin_type (gdbarch)->builtin_long_double; | |
16895 | break; | |
16896 | } | |
8bdc1658 AB |
16897 | break; |
16898 | } | |
16899 | ||
35add35e AB |
16900 | /* If the type we found doesn't match the size we were looking for, then |
16901 | pretend we didn't find a type at all, the complex target type we | |
16902 | create will then be nameless. */ | |
a12e5744 | 16903 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
16904 | tt = nullptr; |
16905 | ||
8bdc1658 | 16906 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
103a685e | 16907 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
16908 | } |
16909 | ||
c906108c SS |
16910 | /* Find a representation of a given base type and install |
16911 | it in the TYPE field of the die. */ | |
16912 | ||
f792889a | 16913 | static struct type * |
e7c27a73 | 16914 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16915 | { |
518817b3 | 16916 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
16917 | struct type *type; |
16918 | struct attribute *attr; | |
19f392bc | 16919 | int encoding = 0, bits = 0; |
15d034d0 | 16920 | const char *name; |
34877895 | 16921 | gdbarch *arch; |
c906108c | 16922 | |
e142c38c | 16923 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
435d3d88 | 16924 | if (attr != nullptr) |
34877895 | 16925 | encoding = DW_UNSND (attr); |
e142c38c | 16926 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16927 | if (attr != nullptr) |
34877895 | 16928 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
39cbfefa | 16929 | name = dwarf2_name (die, cu); |
6ccb9162 | 16930 | if (!name) |
34877895 | 16931 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e TT |
16932 | |
16933 | arch = get_objfile_arch (objfile); | |
16934 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
16935 | ||
34877895 PJ |
16936 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
16937 | if (attr) | |
103a685e TT |
16938 | { |
16939 | int endianity = DW_UNSND (attr); | |
16940 | ||
16941 | switch (endianity) | |
16942 | { | |
16943 | case DW_END_big: | |
16944 | byte_order = BFD_ENDIAN_BIG; | |
16945 | break; | |
16946 | case DW_END_little: | |
16947 | byte_order = BFD_ENDIAN_LITTLE; | |
16948 | break; | |
16949 | default: | |
16950 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
16951 | break; | |
16952 | } | |
16953 | } | |
6ccb9162 UW |
16954 | |
16955 | switch (encoding) | |
c906108c | 16956 | { |
6ccb9162 UW |
16957 | case DW_ATE_address: |
16958 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16959 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16960 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16961 | break; |
16962 | case DW_ATE_boolean: | |
19f392bc | 16963 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16964 | break; |
16965 | case DW_ATE_complex_float: | |
103a685e TT |
16966 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
16967 | byte_order); | |
19f392bc | 16968 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16969 | break; |
16970 | case DW_ATE_decimal_float: | |
19f392bc | 16971 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
16972 | break; |
16973 | case DW_ATE_float: | |
103a685e | 16974 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
16975 | break; |
16976 | case DW_ATE_signed: | |
eb77c9df | 16977 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
16978 | break; |
16979 | case DW_ATE_unsigned: | |
3b2b8fea TT |
16980 | if (cu->language == language_fortran |
16981 | && name | |
61012eef | 16982 | && startswith (name, "character(")) |
19f392bc UW |
16983 | type = init_character_type (objfile, bits, 1, name); |
16984 | else | |
eb77c9df | 16985 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
16986 | break; |
16987 | case DW_ATE_signed_char: | |
6e70227d | 16988 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
16989 | || cu->language == language_pascal |
16990 | || cu->language == language_fortran) | |
19f392bc UW |
16991 | type = init_character_type (objfile, bits, 0, name); |
16992 | else | |
eb77c9df | 16993 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
16994 | break; |
16995 | case DW_ATE_unsigned_char: | |
868a0084 | 16996 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 16997 | || cu->language == language_pascal |
c44af4eb TT |
16998 | || cu->language == language_fortran |
16999 | || cu->language == language_rust) | |
19f392bc UW |
17000 | type = init_character_type (objfile, bits, 1, name); |
17001 | else | |
eb77c9df | 17002 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17003 | break; |
75079b2b | 17004 | case DW_ATE_UTF: |
53e710ac | 17005 | { |
53e710ac PA |
17006 | if (bits == 16) |
17007 | type = builtin_type (arch)->builtin_char16; | |
17008 | else if (bits == 32) | |
17009 | type = builtin_type (arch)->builtin_char32; | |
17010 | else | |
17011 | { | |
b98664d3 | 17012 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17013 | bits); |
eb77c9df | 17014 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17015 | } |
17016 | return set_die_type (die, type, cu); | |
17017 | } | |
75079b2b TT |
17018 | break; |
17019 | ||
6ccb9162 | 17020 | default: |
b98664d3 | 17021 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17022 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17023 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17024 | break; |
c906108c | 17025 | } |
6ccb9162 | 17026 | |
0114d602 | 17027 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17028 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17029 | |
2b4424c3 TT |
17030 | maybe_set_alignment (cu, die, type); |
17031 | ||
103a685e | 17032 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
34877895 | 17033 | |
f792889a | 17034 | return set_die_type (die, type, cu); |
c906108c SS |
17035 | } |
17036 | ||
80180f79 SA |
17037 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17038 | resulting value of the attribute into struct bound_prop. | |
17039 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17040 | ||
17041 | static int | |
17042 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17043 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17044 | struct type *default_type) | |
80180f79 SA |
17045 | { |
17046 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17047 | struct obstack *obstack |
17048 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17049 | |
9a49df9d AB |
17050 | gdb_assert (default_type != NULL); |
17051 | ||
80180f79 SA |
17052 | if (attr == NULL || prop == NULL) |
17053 | return 0; | |
17054 | ||
4fc6c0d5 | 17055 | if (attr->form_is_block ()) |
80180f79 | 17056 | { |
8d749320 | 17057 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17058 | baton->property_type = default_type; |
80180f79 SA |
17059 | baton->locexpr.per_cu = cu->per_cu; |
17060 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17061 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
216a7e6b AB |
17062 | switch (attr->name) |
17063 | { | |
17064 | case DW_AT_string_length: | |
17065 | baton->locexpr.is_reference = true; | |
17066 | break; | |
17067 | default: | |
17068 | baton->locexpr.is_reference = false; | |
17069 | break; | |
17070 | } | |
80180f79 SA |
17071 | prop->data.baton = baton; |
17072 | prop->kind = PROP_LOCEXPR; | |
17073 | gdb_assert (prop->data.baton != NULL); | |
17074 | } | |
cd6c91b4 | 17075 | else if (attr->form_is_ref ()) |
80180f79 SA |
17076 | { |
17077 | struct dwarf2_cu *target_cu = cu; | |
17078 | struct die_info *target_die; | |
17079 | struct attribute *target_attr; | |
17080 | ||
17081 | target_die = follow_die_ref (die, attr, &target_cu); | |
17082 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17083 | if (target_attr == NULL) |
17084 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17085 | target_cu); | |
80180f79 SA |
17086 | if (target_attr == NULL) |
17087 | return 0; | |
17088 | ||
df25ebbd | 17089 | switch (target_attr->name) |
80180f79 | 17090 | { |
df25ebbd | 17091 | case DW_AT_location: |
cd6c91b4 | 17092 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 17093 | { |
8d749320 | 17094 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17095 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17096 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17097 | prop->data.baton = baton; | |
17098 | prop->kind = PROP_LOCLIST; | |
17099 | gdb_assert (prop->data.baton != NULL); | |
17100 | } | |
4fc6c0d5 | 17101 | else if (target_attr->form_is_block ()) |
df25ebbd | 17102 | { |
8d749320 | 17103 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17104 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17105 | baton->locexpr.per_cu = cu->per_cu; |
17106 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17107 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17108 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17109 | prop->data.baton = baton; |
17110 | prop->kind = PROP_LOCEXPR; | |
17111 | gdb_assert (prop->data.baton != NULL); | |
17112 | } | |
17113 | else | |
17114 | { | |
17115 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17116 | "dynamic property"); | |
17117 | return 0; | |
17118 | } | |
17119 | break; | |
17120 | case DW_AT_data_member_location: | |
17121 | { | |
17122 | LONGEST offset; | |
17123 | ||
17124 | if (!handle_data_member_location (target_die, target_cu, | |
17125 | &offset)) | |
17126 | return 0; | |
17127 | ||
8d749320 | 17128 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17129 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17130 | target_cu); |
df25ebbd JB |
17131 | baton->offset_info.offset = offset; |
17132 | baton->offset_info.type = die_type (target_die, target_cu); | |
17133 | prop->data.baton = baton; | |
17134 | prop->kind = PROP_ADDR_OFFSET; | |
17135 | break; | |
17136 | } | |
80180f79 SA |
17137 | } |
17138 | } | |
cd6c91b4 | 17139 | else if (attr->form_is_constant ()) |
80180f79 SA |
17140 | { |
17141 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17142 | prop->kind = PROP_CONST; | |
17143 | } | |
17144 | else | |
17145 | { | |
17146 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17147 | dwarf2_name (die, cu)); | |
17148 | return 0; | |
17149 | } | |
17150 | ||
17151 | return 1; | |
17152 | } | |
17153 | ||
09ba997f | 17154 | /* See read.h. */ |
9a49df9d | 17155 | |
09ba997f TT |
17156 | struct type * |
17157 | dwarf2_per_cu_data::int_type (int size_in_bytes, bool unsigned_p) const | |
9a49df9d | 17158 | { |
09ba997f | 17159 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
17160 | struct type *int_type; |
17161 | ||
17162 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
17163 | #define TRY_TYPE(F) \ |
17164 | int_type = (unsigned_p \ | |
17165 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17166 | : objfile_type (objfile)->builtin_ ## F); \ | |
17167 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
17168 | return int_type |
17169 | ||
17170 | TRY_TYPE (char); | |
17171 | TRY_TYPE (short); | |
17172 | TRY_TYPE (int); | |
17173 | TRY_TYPE (long); | |
17174 | TRY_TYPE (long_long); | |
17175 | ||
17176 | #undef TRY_TYPE | |
17177 | ||
17178 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17179 | } | |
17180 | ||
09ba997f | 17181 | /* See read.h. */ |
11a8b164 | 17182 | |
09ba997f TT |
17183 | struct type * |
17184 | dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p) const | |
11a8b164 | 17185 | { |
09ba997f TT |
17186 | int addr_size = this->addr_size (); |
17187 | return int_type (addr_size, unsigned_p); | |
11a8b164 AB |
17188 | } |
17189 | ||
b86352cf AB |
17190 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17191 | present (which is valid) then compute the default type based on the | |
17192 | compilation units address size. */ | |
17193 | ||
17194 | static struct type * | |
17195 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17196 | { | |
17197 | struct type *index_type = die_type (die, cu); | |
17198 | ||
17199 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17200 | without specifying a base type. | |
17201 | In that case, the base type must be set to the type of | |
17202 | the lower bound, upper bound or count, in that order, if any of these | |
17203 | three attributes references an object that has a type. | |
17204 | If no base type is found, the Dwarf-2 specifications say that | |
17205 | a signed integer type of size equal to the size of an address should | |
17206 | be used. | |
17207 | For the following C code: `extern char gdb_int [];' | |
17208 | GCC produces an empty range DIE. | |
17209 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17210 | high bound or count are not yet handled by this code. */ | |
17211 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
09ba997f | 17212 | index_type = cu->per_cu->addr_sized_int_type (false); |
b86352cf AB |
17213 | |
17214 | return index_type; | |
17215 | } | |
17216 | ||
a02abb62 JB |
17217 | /* Read the given DW_AT_subrange DIE. */ |
17218 | ||
f792889a | 17219 | static struct type * |
a02abb62 JB |
17220 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17221 | { | |
4c9ad8c2 | 17222 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17223 | struct type *range_type; |
17224 | struct attribute *attr; | |
729efb13 | 17225 | struct dynamic_prop low, high; |
4fae6e18 | 17226 | int low_default_is_valid; |
c451ebe5 | 17227 | int high_bound_is_count = 0; |
15d034d0 | 17228 | const char *name; |
d359392f | 17229 | ULONGEST negative_mask; |
e77813c8 | 17230 | |
b86352cf AB |
17231 | orig_base_type = read_subrange_index_type (die, cu); |
17232 | ||
4c9ad8c2 TT |
17233 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17234 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17235 | creating the range type, but we use the result of check_typedef | |
17236 | when examining properties of the type. */ | |
17237 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17238 | |
7e314c57 JK |
17239 | /* The die_type call above may have already set the type for this DIE. */ |
17240 | range_type = get_die_type (die, cu); | |
17241 | if (range_type) | |
17242 | return range_type; | |
17243 | ||
729efb13 SA |
17244 | low.kind = PROP_CONST; |
17245 | high.kind = PROP_CONST; | |
17246 | high.data.const_val = 0; | |
17247 | ||
4fae6e18 JK |
17248 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17249 | omitting DW_AT_lower_bound. */ | |
17250 | switch (cu->language) | |
6e70227d | 17251 | { |
4fae6e18 JK |
17252 | case language_c: |
17253 | case language_cplus: | |
729efb13 | 17254 | low.data.const_val = 0; |
4fae6e18 JK |
17255 | low_default_is_valid = 1; |
17256 | break; | |
17257 | case language_fortran: | |
729efb13 | 17258 | low.data.const_val = 1; |
4fae6e18 JK |
17259 | low_default_is_valid = 1; |
17260 | break; | |
17261 | case language_d: | |
4fae6e18 | 17262 | case language_objc: |
c44af4eb | 17263 | case language_rust: |
729efb13 | 17264 | low.data.const_val = 0; |
4fae6e18 JK |
17265 | low_default_is_valid = (cu->header.version >= 4); |
17266 | break; | |
17267 | case language_ada: | |
17268 | case language_m2: | |
17269 | case language_pascal: | |
729efb13 | 17270 | low.data.const_val = 1; |
4fae6e18 JK |
17271 | low_default_is_valid = (cu->header.version >= 4); |
17272 | break; | |
17273 | default: | |
729efb13 | 17274 | low.data.const_val = 0; |
4fae6e18 JK |
17275 | low_default_is_valid = 0; |
17276 | break; | |
a02abb62 JB |
17277 | } |
17278 | ||
e142c38c | 17279 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 17280 | if (attr != nullptr) |
9a49df9d | 17281 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17282 | else if (!low_default_is_valid) |
b98664d3 | 17283 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17284 | "- DIE at %s [in module %s]"), |
17285 | sect_offset_str (die->sect_off), | |
518817b3 | 17286 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17287 | |
506f5c41 TV |
17288 | struct attribute *attr_ub, *attr_count; |
17289 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17290 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17291 | { |
506f5c41 | 17292 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17293 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17294 | { |
c451ebe5 SA |
17295 | /* If bounds are constant do the final calculation here. */ |
17296 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17297 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17298 | else | |
17299 | high_bound_is_count = 1; | |
c2ff108b | 17300 | } |
506f5c41 TV |
17301 | else |
17302 | { | |
17303 | if (attr_ub != NULL) | |
17304 | complaint (_("Unresolved DW_AT_upper_bound " | |
17305 | "- DIE at %s [in module %s]"), | |
17306 | sect_offset_str (die->sect_off), | |
17307 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17308 | if (attr_count != NULL) | |
17309 | complaint (_("Unresolved DW_AT_count " | |
17310 | "- DIE at %s [in module %s]"), | |
17311 | sect_offset_str (die->sect_off), | |
17312 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17313 | } | |
e77813c8 | 17314 | } |
a02abb62 | 17315 | |
4e962e74 TT |
17316 | LONGEST bias = 0; |
17317 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 17318 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
4e962e74 TT |
17319 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); |
17320 | ||
dbb9c2b1 JB |
17321 | /* Normally, the DWARF producers are expected to use a signed |
17322 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17323 | But this is unfortunately not always the case, as witnessed | |
17324 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17325 | is used instead. To work around that ambiguity, we treat | |
17326 | the bounds as signed, and thus sign-extend their values, when | |
17327 | the base type is signed. */ | |
6e70227d | 17328 | negative_mask = |
d359392f | 17329 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17330 | if (low.kind == PROP_CONST |
17331 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17332 | low.data.const_val |= negative_mask; | |
17333 | if (high.kind == PROP_CONST | |
17334 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17335 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17336 | |
5bbd8269 AB |
17337 | /* Check for bit and byte strides. */ |
17338 | struct dynamic_prop byte_stride_prop; | |
17339 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
17340 | if (attr_byte_stride != nullptr) | |
17341 | { | |
09ba997f | 17342 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17343 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
17344 | prop_type); | |
17345 | } | |
17346 | ||
17347 | struct dynamic_prop bit_stride_prop; | |
17348 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
17349 | if (attr_bit_stride != nullptr) | |
17350 | { | |
17351 | /* It only makes sense to have either a bit or byte stride. */ | |
17352 | if (attr_byte_stride != nullptr) | |
17353 | { | |
17354 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
17355 | "- DIE at %s [in module %s]"), | |
17356 | sect_offset_str (die->sect_off), | |
17357 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17358 | attr_bit_stride = nullptr; | |
17359 | } | |
17360 | else | |
17361 | { | |
09ba997f | 17362 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17363 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
17364 | prop_type); | |
17365 | } | |
17366 | } | |
17367 | ||
17368 | if (attr_byte_stride != nullptr | |
17369 | || attr_bit_stride != nullptr) | |
17370 | { | |
17371 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
17372 | struct dynamic_prop *stride | |
17373 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
17374 | ||
17375 | range_type | |
17376 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
17377 | &high, bias, stride, byte_stride_p); | |
17378 | } | |
17379 | else | |
17380 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 17381 | |
c451ebe5 SA |
17382 | if (high_bound_is_count) |
17383 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17384 | ||
c2ff108b JK |
17385 | /* Ada expects an empty array on no boundary attributes. */ |
17386 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17387 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17388 | |
39cbfefa DJ |
17389 | name = dwarf2_name (die, cu); |
17390 | if (name) | |
17391 | TYPE_NAME (range_type) = name; | |
6e70227d | 17392 | |
e142c38c | 17393 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17394 | if (attr != nullptr) |
a02abb62 JB |
17395 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
17396 | ||
2b4424c3 TT |
17397 | maybe_set_alignment (cu, die, range_type); |
17398 | ||
7e314c57 JK |
17399 | set_die_type (die, range_type, cu); |
17400 | ||
17401 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17402 | set_descriptive_type (range_type, die, cu); |
17403 | ||
7e314c57 | 17404 | return range_type; |
a02abb62 | 17405 | } |
6e70227d | 17406 | |
f792889a | 17407 | static struct type * |
81a17f79 JB |
17408 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17409 | { | |
17410 | struct type *type; | |
81a17f79 | 17411 | |
518817b3 SM |
17412 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17413 | NULL); | |
0114d602 | 17414 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17415 | |
74a2f8ff | 17416 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 17417 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
17418 | such a type, we treat it as a stub, and try to resolve it later on, |
17419 | when needed. */ | |
17420 | if (cu->language == language_ada) | |
17421 | TYPE_STUB (type) = 1; | |
17422 | ||
f792889a | 17423 | return set_die_type (die, type, cu); |
81a17f79 | 17424 | } |
a02abb62 | 17425 | |
639d11d3 DC |
17426 | /* Read a single die and all its descendents. Set the die's sibling |
17427 | field to NULL; set other fields in the die correctly, and set all | |
17428 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17429 | location of the info_ptr after reading all of those dies. PARENT | |
17430 | is the parent of the die in question. */ | |
17431 | ||
17432 | static struct die_info * | |
dee91e82 | 17433 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17434 | const gdb_byte *info_ptr, |
17435 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17436 | struct die_info *parent) |
639d11d3 DC |
17437 | { |
17438 | struct die_info *die; | |
d521ce57 | 17439 | const gdb_byte *cur_ptr; |
639d11d3 | 17440 | |
3e225074 | 17441 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
17442 | if (die == NULL) |
17443 | { | |
17444 | *new_info_ptr = cur_ptr; | |
17445 | return NULL; | |
17446 | } | |
93311388 | 17447 | store_in_ref_table (die, reader->cu); |
639d11d3 | 17448 | |
3e225074 | 17449 | if (die->has_children) |
bf6af496 | 17450 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17451 | else |
17452 | { | |
17453 | die->child = NULL; | |
17454 | *new_info_ptr = cur_ptr; | |
17455 | } | |
17456 | ||
17457 | die->sibling = NULL; | |
17458 | die->parent = parent; | |
17459 | return die; | |
17460 | } | |
17461 | ||
17462 | /* Read a die, all of its descendents, and all of its siblings; set | |
17463 | all of the fields of all of the dies correctly. Arguments are as | |
17464 | in read_die_and_children. */ | |
17465 | ||
17466 | static struct die_info * | |
bf6af496 | 17467 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17468 | const gdb_byte *info_ptr, |
17469 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17470 | struct die_info *parent) |
639d11d3 DC |
17471 | { |
17472 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17473 | const gdb_byte *cur_ptr; |
639d11d3 | 17474 | |
c906108c | 17475 | cur_ptr = info_ptr; |
639d11d3 DC |
17476 | first_die = last_sibling = NULL; |
17477 | ||
17478 | while (1) | |
c906108c | 17479 | { |
639d11d3 | 17480 | struct die_info *die |
dee91e82 | 17481 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17482 | |
1d325ec1 | 17483 | if (die == NULL) |
c906108c | 17484 | { |
639d11d3 DC |
17485 | *new_info_ptr = cur_ptr; |
17486 | return first_die; | |
c906108c | 17487 | } |
1d325ec1 DJ |
17488 | |
17489 | if (!first_die) | |
17490 | first_die = die; | |
c906108c | 17491 | else |
1d325ec1 DJ |
17492 | last_sibling->sibling = die; |
17493 | ||
17494 | last_sibling = die; | |
c906108c | 17495 | } |
c906108c SS |
17496 | } |
17497 | ||
bf6af496 DE |
17498 | /* Read a die, all of its descendents, and all of its siblings; set |
17499 | all of the fields of all of the dies correctly. Arguments are as | |
17500 | in read_die_and_children. | |
17501 | This the main entry point for reading a DIE and all its children. */ | |
17502 | ||
17503 | static struct die_info * | |
17504 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17505 | const gdb_byte *info_ptr, |
17506 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17507 | struct die_info *parent) |
17508 | { | |
17509 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17510 | new_info_ptr, parent); | |
17511 | ||
b4f54984 | 17512 | if (dwarf_die_debug) |
bf6af496 DE |
17513 | { |
17514 | fprintf_unfiltered (gdb_stdlog, | |
17515 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17516 | reader->die_section->get_name (), |
bf6af496 DE |
17517 | (unsigned) (info_ptr - reader->die_section->buffer), |
17518 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17519 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17520 | } |
17521 | ||
17522 | return die; | |
17523 | } | |
17524 | ||
3019eac3 DE |
17525 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17526 | attributes. | |
17527 | The caller is responsible for filling in the extra attributes | |
17528 | and updating (*DIEP)->num_attrs. | |
17529 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17530 | except for its child, sibling, and parent fields. */ |
93311388 | 17531 | |
d521ce57 | 17532 | static const gdb_byte * |
3019eac3 | 17533 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17534 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 17535 | int num_extra_attrs) |
93311388 | 17536 | { |
b64f50a1 | 17537 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17538 | struct abbrev_info *abbrev; |
17539 | struct die_info *die; | |
17540 | struct dwarf2_cu *cu = reader->cu; | |
17541 | bfd *abfd = reader->abfd; | |
17542 | ||
9c541725 | 17543 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17544 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17545 | info_ptr += bytes_read; | |
17546 | if (!abbrev_number) | |
17547 | { | |
17548 | *diep = NULL; | |
93311388 DE |
17549 | return info_ptr; |
17550 | } | |
17551 | ||
685af9cd | 17552 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 17553 | if (!abbrev) |
348e048f DE |
17554 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17555 | abbrev_number, | |
17556 | bfd_get_filename (abfd)); | |
17557 | ||
3019eac3 | 17558 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17559 | die->sect_off = sect_off; |
93311388 DE |
17560 | die->tag = abbrev->tag; |
17561 | die->abbrev = abbrev_number; | |
3e225074 | 17562 | die->has_children = abbrev->has_children; |
93311388 | 17563 | |
3019eac3 DE |
17564 | /* Make the result usable. |
17565 | The caller needs to update num_attrs after adding the extra | |
17566 | attributes. */ | |
93311388 DE |
17567 | die->num_attrs = abbrev->num_attrs; |
17568 | ||
18a8505e | 17569 | std::vector<int> indexes_that_need_reprocess; |
93311388 | 17570 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e AT |
17571 | { |
17572 | bool need_reprocess; | |
17573 | info_ptr = | |
17574 | read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], | |
17575 | info_ptr, &need_reprocess); | |
17576 | if (need_reprocess) | |
17577 | indexes_that_need_reprocess.push_back (i); | |
17578 | } | |
17579 | ||
17580 | struct attribute *attr = dwarf2_attr_no_follow (die, DW_AT_str_offsets_base); | |
17581 | if (attr != nullptr) | |
17582 | cu->str_offsets_base = DW_UNSND (attr); | |
93311388 | 17583 | |
18a8505e AT |
17584 | auto maybe_addr_base = lookup_addr_base(die); |
17585 | if (maybe_addr_base.has_value ()) | |
17586 | cu->addr_base = *maybe_addr_base; | |
17587 | for (int index : indexes_that_need_reprocess) | |
17588 | read_attribute_reprocess (reader, &die->attrs[index]); | |
93311388 | 17589 | *diep = die; |
93311388 DE |
17590 | return info_ptr; |
17591 | } | |
17592 | ||
3019eac3 DE |
17593 | /* Read a die and all its attributes. |
17594 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17595 | except for its child, sibling, and parent fields. */ |
3019eac3 | 17596 | |
d521ce57 | 17597 | static const gdb_byte * |
3019eac3 | 17598 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 17599 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 17600 | { |
d521ce57 | 17601 | const gdb_byte *result; |
bf6af496 | 17602 | |
3e225074 | 17603 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 17604 | |
b4f54984 | 17605 | if (dwarf_die_debug) |
bf6af496 DE |
17606 | { |
17607 | fprintf_unfiltered (gdb_stdlog, | |
17608 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17609 | reader->die_section->get_name (), |
bf6af496 DE |
17610 | (unsigned) (info_ptr - reader->die_section->buffer), |
17611 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17612 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17613 | } |
17614 | ||
17615 | return result; | |
3019eac3 | 17616 | } |
433df2d4 | 17617 | \f |
c906108c | 17618 | |
72bf9492 DJ |
17619 | /* Returns nonzero if TAG represents a type that we might generate a partial |
17620 | symbol for. */ | |
17621 | ||
17622 | static int | |
17623 | is_type_tag_for_partial (int tag) | |
17624 | { | |
17625 | switch (tag) | |
17626 | { | |
17627 | #if 0 | |
17628 | /* Some types that would be reasonable to generate partial symbols for, | |
17629 | that we don't at present. */ | |
17630 | case DW_TAG_array_type: | |
17631 | case DW_TAG_file_type: | |
17632 | case DW_TAG_ptr_to_member_type: | |
17633 | case DW_TAG_set_type: | |
17634 | case DW_TAG_string_type: | |
17635 | case DW_TAG_subroutine_type: | |
17636 | #endif | |
17637 | case DW_TAG_base_type: | |
17638 | case DW_TAG_class_type: | |
680b30c7 | 17639 | case DW_TAG_interface_type: |
72bf9492 DJ |
17640 | case DW_TAG_enumeration_type: |
17641 | case DW_TAG_structure_type: | |
17642 | case DW_TAG_subrange_type: | |
17643 | case DW_TAG_typedef: | |
17644 | case DW_TAG_union_type: | |
17645 | return 1; | |
17646 | default: | |
17647 | return 0; | |
17648 | } | |
17649 | } | |
17650 | ||
17651 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
17652 | ||
17653 | static struct partial_die_info * | |
dee91e82 | 17654 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 17655 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 17656 | { |
dee91e82 | 17657 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 17658 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 17659 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 17660 | unsigned int bytes_read; |
5afb4e99 | 17661 | unsigned int load_all = 0; |
72bf9492 DJ |
17662 | int nesting_level = 1; |
17663 | ||
17664 | parent_die = NULL; | |
17665 | last_die = NULL; | |
17666 | ||
7adf1e79 DE |
17667 | gdb_assert (cu->per_cu != NULL); |
17668 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
17669 | load_all = 1; |
17670 | ||
72bf9492 DJ |
17671 | cu->partial_dies |
17672 | = htab_create_alloc_ex (cu->header.length / 12, | |
17673 | partial_die_hash, | |
17674 | partial_die_eq, | |
17675 | NULL, | |
17676 | &cu->comp_unit_obstack, | |
17677 | hashtab_obstack_allocate, | |
17678 | dummy_obstack_deallocate); | |
17679 | ||
72bf9492 DJ |
17680 | while (1) |
17681 | { | |
685af9cd | 17682 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
17683 | |
17684 | /* A NULL abbrev means the end of a series of children. */ | |
17685 | if (abbrev == NULL) | |
17686 | { | |
17687 | if (--nesting_level == 0) | |
cd9983dd YQ |
17688 | return first_die; |
17689 | ||
72bf9492 DJ |
17690 | info_ptr += bytes_read; |
17691 | last_die = parent_die; | |
17692 | parent_die = parent_die->die_parent; | |
17693 | continue; | |
17694 | } | |
17695 | ||
98bfdba5 PA |
17696 | /* Check for template arguments. We never save these; if |
17697 | they're seen, we just mark the parent, and go on our way. */ | |
17698 | if (parent_die != NULL | |
17699 | && cu->language == language_cplus | |
17700 | && (abbrev->tag == DW_TAG_template_type_param | |
17701 | || abbrev->tag == DW_TAG_template_value_param)) | |
17702 | { | |
17703 | parent_die->has_template_arguments = 1; | |
17704 | ||
17705 | if (!load_all) | |
17706 | { | |
17707 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 17708 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17709 | continue; |
17710 | } | |
17711 | } | |
17712 | ||
0d99eb77 | 17713 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
17714 | Skip their other children. */ |
17715 | if (!load_all | |
17716 | && cu->language == language_cplus | |
17717 | && parent_die != NULL | |
17718 | && parent_die->tag == DW_TAG_subprogram) | |
17719 | { | |
dee91e82 | 17720 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17721 | continue; |
17722 | } | |
17723 | ||
5afb4e99 DJ |
17724 | /* Check whether this DIE is interesting enough to save. Normally |
17725 | we would not be interested in members here, but there may be | |
17726 | later variables referencing them via DW_AT_specification (for | |
17727 | static members). */ | |
17728 | if (!load_all | |
17729 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 17730 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
17731 | && abbrev->tag != DW_TAG_enumerator |
17732 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 17733 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 17734 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 17735 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 17736 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 17737 | && abbrev->tag != DW_TAG_module |
95554aad | 17738 | && abbrev->tag != DW_TAG_member |
74921315 KS |
17739 | && abbrev->tag != DW_TAG_imported_unit |
17740 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
17741 | { |
17742 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17743 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
17744 | continue; |
17745 | } | |
17746 | ||
6f06d47b YQ |
17747 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
17748 | abbrev); | |
cd9983dd | 17749 | |
48fbe735 | 17750 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
17751 | |
17752 | /* This two-pass algorithm for processing partial symbols has a | |
17753 | high cost in cache pressure. Thus, handle some simple cases | |
17754 | here which cover the majority of C partial symbols. DIEs | |
17755 | which neither have specification tags in them, nor could have | |
17756 | specification tags elsewhere pointing at them, can simply be | |
17757 | processed and discarded. | |
17758 | ||
17759 | This segment is also optional; scan_partial_symbols and | |
17760 | add_partial_symbol will handle these DIEs if we chain | |
17761 | them in normally. When compilers which do not emit large | |
17762 | quantities of duplicate debug information are more common, | |
17763 | this code can probably be removed. */ | |
17764 | ||
17765 | /* Any complete simple types at the top level (pretty much all | |
17766 | of them, for a language without namespaces), can be processed | |
17767 | directly. */ | |
17768 | if (parent_die == NULL | |
cd9983dd YQ |
17769 | && pdi.has_specification == 0 |
17770 | && pdi.is_declaration == 0 | |
17771 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
17772 | || pdi.tag == DW_TAG_base_type | |
17773 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 17774 | { |
cd9983dd | 17775 | if (building_psymtab && pdi.name != NULL) |
31edb802 | 17776 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17777 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 17778 | psymbol_placement::STATIC, |
1762568f | 17779 | 0, cu->language, objfile); |
cd9983dd | 17780 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17781 | continue; |
17782 | } | |
17783 | ||
d8228535 JK |
17784 | /* The exception for DW_TAG_typedef with has_children above is |
17785 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 17786 | type_name_or_error will error on such types later. |
d8228535 JK |
17787 | |
17788 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17789 | it could not find the child DIEs referenced later, this is checked | |
17790 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17791 | ||
cd9983dd | 17792 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 17793 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 17794 | "- DIE at %s [in module %s]"), |
cd9983dd | 17795 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 17796 | |
72bf9492 DJ |
17797 | /* If we're at the second level, and we're an enumerator, and |
17798 | our parent has no specification (meaning possibly lives in a | |
17799 | namespace elsewhere), then we can add the partial symbol now | |
17800 | instead of queueing it. */ | |
cd9983dd | 17801 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
17802 | && parent_die != NULL |
17803 | && parent_die->die_parent == NULL | |
17804 | && parent_die->tag == DW_TAG_enumeration_type | |
17805 | && parent_die->has_specification == 0) | |
17806 | { | |
cd9983dd | 17807 | if (pdi.name == NULL) |
b98664d3 | 17808 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 17809 | else if (building_psymtab) |
31edb802 | 17810 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17811 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 17812 | cu->language == language_cplus |
75aedd27 TT |
17813 | ? psymbol_placement::GLOBAL |
17814 | : psymbol_placement::STATIC, | |
1762568f | 17815 | 0, cu->language, objfile); |
72bf9492 | 17816 | |
cd9983dd | 17817 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17818 | continue; |
17819 | } | |
17820 | ||
cd9983dd | 17821 | struct partial_die_info *part_die |
6f06d47b | 17822 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 17823 | |
72bf9492 DJ |
17824 | /* We'll save this DIE so link it in. */ |
17825 | part_die->die_parent = parent_die; | |
17826 | part_die->die_sibling = NULL; | |
17827 | part_die->die_child = NULL; | |
17828 | ||
17829 | if (last_die && last_die == parent_die) | |
17830 | last_die->die_child = part_die; | |
17831 | else if (last_die) | |
17832 | last_die->die_sibling = part_die; | |
17833 | ||
17834 | last_die = part_die; | |
17835 | ||
17836 | if (first_die == NULL) | |
17837 | first_die = part_die; | |
17838 | ||
17839 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17840 | find interesting need to be in the hash table, because we | |
17841 | also have the parent/sibling/child chains; only those that we | |
17842 | might refer to by offset later during partial symbol reading. | |
17843 | ||
17844 | For now this means things that might have be the target of a | |
17845 | DW_AT_specification, DW_AT_abstract_origin, or | |
17846 | DW_AT_extension. DW_AT_extension will refer only to | |
17847 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17848 | many things under the function DIE, but we do not recurse | |
17849 | into function DIEs during partial symbol reading) and | |
17850 | possibly variables as well; DW_AT_specification refers to | |
17851 | declarations. Declarations ought to have the DW_AT_declaration | |
17852 | flag. It happens that GCC forgets to put it in sometimes, but | |
17853 | only for functions, not for types. | |
17854 | ||
17855 | Adding more things than necessary to the hash table is harmless | |
17856 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17857 | wasted time in find_partial_die, when we reread the compilation |
17858 | unit with load_all_dies set. */ | |
72bf9492 | 17859 | |
5afb4e99 | 17860 | if (load_all |
72929c62 | 17861 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17862 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17863 | || abbrev->tag == DW_TAG_variable |
17864 | || abbrev->tag == DW_TAG_namespace | |
17865 | || part_die->is_declaration) | |
17866 | { | |
17867 | void **slot; | |
17868 | ||
17869 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17870 | to_underlying (part_die->sect_off), |
17871 | INSERT); | |
72bf9492 DJ |
17872 | *slot = part_die; |
17873 | } | |
17874 | ||
72bf9492 | 17875 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 17876 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17877 | languages we have to, so that we can get at method physnames |
17878 | to infer fully qualified class names, for DW_AT_specification, | |
17879 | and for C++ template arguments. For C++, we also look one level | |
17880 | inside functions to find template arguments (if the name of the | |
17881 | function does not already contain the template arguments). | |
bc30ff58 | 17882 | |
0a4b0913 AB |
17883 | For Ada and Fortran, we need to scan the children of subprograms |
17884 | and lexical blocks as well because these languages allow the | |
17885 | definition of nested entities that could be interesting for the | |
17886 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 17887 | if (last_die->has_children |
5afb4e99 DJ |
17888 | && (load_all |
17889 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17890 | || last_die->tag == DW_TAG_module |
72bf9492 | 17891 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17892 | || (cu->language == language_cplus |
17893 | && last_die->tag == DW_TAG_subprogram | |
17894 | && (last_die->name == NULL | |
17895 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17896 | || (cu->language != language_c |
17897 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17898 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17899 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 17900 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
17901 | || ((cu->language == language_ada |
17902 | || cu->language == language_fortran) | |
bc30ff58 JB |
17903 | && (last_die->tag == DW_TAG_subprogram |
17904 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17905 | { |
17906 | nesting_level++; | |
17907 | parent_die = last_die; | |
17908 | continue; | |
17909 | } | |
17910 | ||
17911 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17912 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17913 | |
17914 | /* Back to the top, do it again. */ | |
17915 | } | |
17916 | } | |
17917 | ||
6f06d47b YQ |
17918 | partial_die_info::partial_die_info (sect_offset sect_off_, |
17919 | struct abbrev_info *abbrev) | |
17920 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
17921 | { | |
17922 | } | |
17923 | ||
35cc7ed7 YQ |
17924 | /* Read a minimal amount of information into the minimal die structure. |
17925 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 17926 | |
48fbe735 YQ |
17927 | const gdb_byte * |
17928 | partial_die_info::read (const struct die_reader_specs *reader, | |
17929 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 17930 | { |
dee91e82 | 17931 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
17932 | struct dwarf2_per_objfile *dwarf2_per_objfile |
17933 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 17934 | unsigned int i; |
c5aa993b | 17935 | int has_low_pc_attr = 0; |
c906108c | 17936 | int has_high_pc_attr = 0; |
91da1414 | 17937 | int high_pc_relative = 0; |
c906108c | 17938 | |
18a8505e | 17939 | std::vector<struct attribute> attr_vec (abbrev.num_attrs); |
fd0a254f | 17940 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 17941 | { |
18a8505e AT |
17942 | bool need_reprocess; |
17943 | info_ptr = read_attribute (reader, &attr_vec[i], &abbrev.attrs[i], | |
17944 | info_ptr, &need_reprocess); | |
17945 | /* String and address offsets that need to do the reprocessing have | |
17946 | already been read at this point, so there is no need to wait until | |
17947 | the loop terminates to do the reprocessing. */ | |
17948 | if (need_reprocess) | |
17949 | read_attribute_reprocess (reader, &attr_vec[i]); | |
17950 | attribute &attr = attr_vec[i]; | |
c906108c | 17951 | /* Store the data if it is of an attribute we want to keep in a |
c5aa993b | 17952 | partial symbol table. */ |
c906108c SS |
17953 | switch (attr.name) |
17954 | { | |
17955 | case DW_AT_name: | |
48fbe735 | 17956 | switch (tag) |
71c25dea TT |
17957 | { |
17958 | case DW_TAG_compile_unit: | |
95554aad | 17959 | case DW_TAG_partial_unit: |
348e048f | 17960 | case DW_TAG_type_unit: |
71c25dea TT |
17961 | /* Compilation units have a DW_AT_name that is a filename, not |
17962 | a source language identifier. */ | |
17963 | case DW_TAG_enumeration_type: | |
17964 | case DW_TAG_enumerator: | |
17965 | /* These tags always have simple identifiers already; no need | |
17966 | to canonicalize them. */ | |
48fbe735 | 17967 | name = DW_STRING (&attr); |
71c25dea TT |
17968 | break; |
17969 | default: | |
48fbe735 YQ |
17970 | { |
17971 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17972 | ||
17973 | name | |
17974 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
17975 | &objfile->per_bfd->storage_obstack); | |
17976 | } | |
71c25dea TT |
17977 | break; |
17978 | } | |
c906108c | 17979 | break; |
31ef98ae | 17980 | case DW_AT_linkage_name: |
c906108c | 17981 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
17982 | /* Note that both forms of linkage name might appear. We |
17983 | assume they will be the same, and we only store the last | |
17984 | one we see. */ | |
48fbe735 | 17985 | linkage_name = DW_STRING (&attr); |
c906108c SS |
17986 | break; |
17987 | case DW_AT_low_pc: | |
17988 | has_low_pc_attr = 1; | |
cd6c91b4 | 17989 | lowpc = attr.value_as_address (); |
c906108c SS |
17990 | break; |
17991 | case DW_AT_high_pc: | |
17992 | has_high_pc_attr = 1; | |
cd6c91b4 TT |
17993 | highpc = attr.value_as_address (); |
17994 | if (cu->header.version >= 4 && attr.form_is_constant ()) | |
31aa7e4e | 17995 | high_pc_relative = 1; |
c906108c SS |
17996 | break; |
17997 | case DW_AT_location: | |
0963b4bd | 17998 | /* Support the .debug_loc offsets. */ |
4fc6c0d5 | 17999 | if (attr.form_is_block ()) |
8e19ed76 | 18000 | { |
48fbe735 | 18001 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18002 | } |
cd6c91b4 | 18003 | else if (attr.form_is_section_offset ()) |
8e19ed76 | 18004 | { |
4d3c2250 | 18005 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18006 | } |
18007 | else | |
18008 | { | |
4d3c2250 KB |
18009 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18010 | "partial symbol information"); | |
8e19ed76 | 18011 | } |
c906108c | 18012 | break; |
c906108c | 18013 | case DW_AT_external: |
48fbe735 | 18014 | is_external = DW_UNSND (&attr); |
c906108c SS |
18015 | break; |
18016 | case DW_AT_declaration: | |
48fbe735 | 18017 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18018 | break; |
18019 | case DW_AT_type: | |
48fbe735 | 18020 | has_type = 1; |
c906108c SS |
18021 | break; |
18022 | case DW_AT_abstract_origin: | |
18023 | case DW_AT_specification: | |
72bf9492 | 18024 | case DW_AT_extension: |
48fbe735 YQ |
18025 | has_specification = 1; |
18026 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18027 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18028 | || cu->per_cu->is_dwz); |
c906108c SS |
18029 | break; |
18030 | case DW_AT_sibling: | |
18031 | /* Ignore absolute siblings, they might point outside of | |
18032 | the current compile unit. */ | |
18033 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18034 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18035 | else |
b9502d3f | 18036 | { |
48fbe735 | 18037 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18038 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18039 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18040 | |
18041 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18042 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
18043 | else if (sibling_ptr > reader->buffer_end) |
18044 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 18045 | else |
48fbe735 | 18046 | sibling = sibling_ptr; |
b9502d3f | 18047 | } |
c906108c | 18048 | break; |
fa4028e9 | 18049 | case DW_AT_byte_size: |
48fbe735 | 18050 | has_byte_size = 1; |
fa4028e9 | 18051 | break; |
ff908ebf | 18052 | case DW_AT_const_value: |
48fbe735 | 18053 | has_const_value = 1; |
ff908ebf | 18054 | break; |
68511cec CES |
18055 | case DW_AT_calling_convention: |
18056 | /* DWARF doesn't provide a way to identify a program's source-level | |
18057 | entry point. DW_AT_calling_convention attributes are only meant | |
18058 | to describe functions' calling conventions. | |
18059 | ||
18060 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18061 | Fortran, and before DWARF 4 DW_CC_program was the only |
18062 | piece of debugging information whose definition refers to | |
18063 | a 'main program' at all, several compilers marked Fortran | |
18064 | main programs with DW_CC_program --- even when those | |
18065 | functions use the standard calling conventions. | |
18066 | ||
18067 | Although DWARF now specifies a way to provide this | |
18068 | information, we support this practice for backward | |
18069 | compatibility. */ | |
68511cec | 18070 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18071 | && cu->language == language_fortran) |
48fbe735 | 18072 | main_subprogram = 1; |
68511cec | 18073 | break; |
481860b3 GB |
18074 | case DW_AT_inline: |
18075 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18076 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18077 | may_be_inlined = 1; |
481860b3 | 18078 | break; |
95554aad TT |
18079 | |
18080 | case DW_AT_import: | |
48fbe735 | 18081 | if (tag == DW_TAG_imported_unit) |
36586728 | 18082 | { |
48fbe735 YQ |
18083 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18084 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18085 | || cu->per_cu->is_dwz); |
18086 | } | |
95554aad TT |
18087 | break; |
18088 | ||
0c1b455e | 18089 | case DW_AT_main_subprogram: |
48fbe735 | 18090 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18091 | break; |
18092 | ||
05caa1d2 TT |
18093 | case DW_AT_ranges: |
18094 | { | |
18095 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18096 | but that requires a full DIE, so instead we just | |
18097 | reimplement it. */ | |
18098 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18099 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18100 | + (need_ranges_base | |
18101 | ? cu->ranges_base | |
18102 | : 0)); | |
18103 | ||
18104 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18105 | .debug_ranges section. */ | |
18106 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18107 | nullptr)) | |
18108 | has_pc_info = 1; | |
18109 | } | |
18110 | break; | |
18111 | ||
c906108c SS |
18112 | default: |
18113 | break; | |
18114 | } | |
18115 | } | |
18116 | ||
10d06d82 TT |
18117 | /* For Ada, if both the name and the linkage name appear, we prefer |
18118 | the latter. This lets "catch exception" work better, regardless | |
18119 | of the order in which the name and linkage name were emitted. | |
18120 | Really, though, this is just a workaround for the fact that gdb | |
18121 | doesn't store both the name and the linkage name. */ | |
18122 | if (cu->language == language_ada && linkage_name != nullptr) | |
18123 | name = linkage_name; | |
18124 | ||
91da1414 | 18125 | if (high_pc_relative) |
48fbe735 | 18126 | highpc += lowpc; |
91da1414 | 18127 | |
9373cf26 JK |
18128 | if (has_low_pc_attr && has_high_pc_attr) |
18129 | { | |
18130 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18131 | eliminate duplicate copies of functions and vtables and such. | |
18132 | The linker will arbitrarily choose one and discard the others. | |
18133 | The AT_*_pc values for such functions refer to local labels in | |
18134 | these sections. If the section from that file was discarded, the | |
18135 | labels are not in the output, so the relocs get a value of 0. | |
18136 | If this is a discarded function, mark the pc bounds as invalid, | |
18137 | so that GDB will ignore it. */ | |
48fbe735 | 18138 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18139 | { |
48fbe735 | 18140 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18141 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18142 | |
b98664d3 | 18143 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18144 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18145 | paddress (gdbarch, lowpc), |
18146 | sect_offset_str (sect_off), | |
9d8780f0 | 18147 | objfile_name (objfile)); |
9373cf26 JK |
18148 | } |
18149 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18150 | else if (lowpc >= highpc) |
9373cf26 | 18151 | { |
48fbe735 | 18152 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18153 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18154 | |
b98664d3 | 18155 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18156 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18157 | paddress (gdbarch, lowpc), |
18158 | paddress (gdbarch, highpc), | |
18159 | sect_offset_str (sect_off), | |
9c541725 | 18160 | objfile_name (objfile)); |
9373cf26 JK |
18161 | } |
18162 | else | |
48fbe735 | 18163 | has_pc_info = 1; |
9373cf26 | 18164 | } |
85cbf3d3 | 18165 | |
c906108c SS |
18166 | return info_ptr; |
18167 | } | |
18168 | ||
72bf9492 DJ |
18169 | /* Find a cached partial DIE at OFFSET in CU. */ |
18170 | ||
d590ff25 YQ |
18171 | struct partial_die_info * |
18172 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18173 | { |
18174 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18175 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18176 | |
9a3c8263 | 18177 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18178 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18179 | to_underlying (sect_off))); |
72bf9492 | 18180 | |
72bf9492 DJ |
18181 | return lookup_die; |
18182 | } | |
18183 | ||
348e048f DE |
18184 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18185 | except in the case of .debug_types DIEs which do not reference | |
18186 | outside their CU (they do however referencing other types via | |
55f1336d | 18187 | DW_FORM_ref_sig8). */ |
72bf9492 | 18188 | |
122cf0f2 | 18189 | static const struct cu_partial_die_info |
9c541725 | 18190 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18191 | { |
518817b3 SM |
18192 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18193 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18194 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18195 | struct dwarf2_per_cu_data *per_cu = NULL; |
18196 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18197 | |
36586728 | 18198 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 18199 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 18200 | { |
d590ff25 | 18201 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18202 | if (pd != NULL) |
fb816e8b | 18203 | return { cu, pd }; |
0d99eb77 DE |
18204 | /* We missed recording what we needed. |
18205 | Load all dies and try again. */ | |
18206 | per_cu = cu->per_cu; | |
5afb4e99 | 18207 | } |
0d99eb77 DE |
18208 | else |
18209 | { | |
18210 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18211 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18212 | { |
9d8780f0 SM |
18213 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18214 | " external reference to offset %s [in module %s].\n"), | |
18215 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18216 | bfd_get_filename (objfile->obfd)); |
18217 | } | |
9c541725 | 18218 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18219 | dwarf2_per_objfile); |
72bf9492 | 18220 | |
0d99eb77 DE |
18221 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18222 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18223 | |
0d99eb77 | 18224 | per_cu->cu->last_used = 0; |
d590ff25 | 18225 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18226 | } |
5afb4e99 | 18227 | |
dee91e82 DE |
18228 | /* If we didn't find it, and not all dies have been loaded, |
18229 | load them all and try again. */ | |
18230 | ||
5afb4e99 DJ |
18231 | if (pd == NULL && per_cu->load_all_dies == 0) |
18232 | { | |
5afb4e99 | 18233 | per_cu->load_all_dies = 1; |
fd820528 DE |
18234 | |
18235 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18236 | THIS_CU->cu may already be in use. So we can't just free it and | |
18237 | replace its DIEs with the ones we read in. Instead, we leave those | |
18238 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18239 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18240 | set. */ | |
dee91e82 | 18241 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18242 | |
d590ff25 | 18243 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18244 | } |
18245 | ||
18246 | if (pd == NULL) | |
18247 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18248 | _("could not find partial DIE %s " |
3e43a32a | 18249 | "in cache [from module %s]\n"), |
9d8780f0 | 18250 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 18251 | return { per_cu->cu, pd }; |
72bf9492 DJ |
18252 | } |
18253 | ||
abc72ce4 DE |
18254 | /* See if we can figure out if the class lives in a namespace. We do |
18255 | this by looking for a member function; its demangled name will | |
18256 | contain namespace info, if there is any. */ | |
18257 | ||
18258 | static void | |
18259 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18260 | struct dwarf2_cu *cu) | |
18261 | { | |
18262 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18263 | what template types look like, because the demangler | |
18264 | frequently doesn't give the same name as the debug info. We | |
18265 | could fix this by only using the demangled name to get the | |
18266 | prefix (but see comment in read_structure_type). */ | |
18267 | ||
18268 | struct partial_die_info *real_pdi; | |
18269 | struct partial_die_info *child_pdi; | |
18270 | ||
18271 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18272 | we should not do this. We'll prepend the parent's fully qualified | |
18273 | name when we create the partial symbol. */ | |
18274 | ||
18275 | real_pdi = struct_pdi; | |
18276 | while (real_pdi->has_specification) | |
fb816e8b | 18277 | { |
122cf0f2 AB |
18278 | auto res = find_partial_die (real_pdi->spec_offset, |
18279 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
18280 | real_pdi = res.pdi; |
18281 | cu = res.cu; | |
18282 | } | |
abc72ce4 DE |
18283 | |
18284 | if (real_pdi->die_parent != NULL) | |
18285 | return; | |
18286 | ||
18287 | for (child_pdi = struct_pdi->die_child; | |
18288 | child_pdi != NULL; | |
18289 | child_pdi = child_pdi->die_sibling) | |
18290 | { | |
18291 | if (child_pdi->tag == DW_TAG_subprogram | |
18292 | && child_pdi->linkage_name != NULL) | |
18293 | { | |
43816ebc TT |
18294 | gdb::unique_xmalloc_ptr<char> actual_class_name |
18295 | (language_class_name_from_physname (cu->language_defn, | |
18296 | child_pdi->linkage_name)); | |
abc72ce4 DE |
18297 | if (actual_class_name != NULL) |
18298 | { | |
518817b3 | 18299 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 | 18300 | struct_pdi->name |
021887d8 | 18301 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
43816ebc | 18302 | actual_class_name.get ()); |
abc72ce4 DE |
18303 | } |
18304 | break; | |
18305 | } | |
18306 | } | |
18307 | } | |
18308 | ||
52356b79 YQ |
18309 | void |
18310 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 18311 | { |
abc72ce4 DE |
18312 | /* Once we've fixed up a die, there's no point in doing so again. |
18313 | This also avoids a memory leak if we were to call | |
18314 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 18315 | if (fixup_called) |
abc72ce4 DE |
18316 | return; |
18317 | ||
72bf9492 DJ |
18318 | /* If we found a reference attribute and the DIE has no name, try |
18319 | to find a name in the referred to DIE. */ | |
18320 | ||
52356b79 | 18321 | if (name == NULL && has_specification) |
72bf9492 DJ |
18322 | { |
18323 | struct partial_die_info *spec_die; | |
72bf9492 | 18324 | |
122cf0f2 | 18325 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
18326 | spec_die = res.pdi; |
18327 | cu = res.cu; | |
72bf9492 | 18328 | |
52356b79 | 18329 | spec_die->fixup (cu); |
72bf9492 DJ |
18330 | |
18331 | if (spec_die->name) | |
18332 | { | |
52356b79 | 18333 | name = spec_die->name; |
72bf9492 DJ |
18334 | |
18335 | /* Copy DW_AT_external attribute if it is set. */ | |
18336 | if (spec_die->is_external) | |
52356b79 | 18337 | is_external = spec_die->is_external; |
72bf9492 DJ |
18338 | } |
18339 | } | |
18340 | ||
18341 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 18342 | |
52356b79 YQ |
18343 | if (name == NULL && tag == DW_TAG_namespace) |
18344 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 18345 | |
abc72ce4 DE |
18346 | /* If there is no parent die to provide a namespace, and there are |
18347 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18348 | name. */ |
abc72ce4 | 18349 | if (cu->language == language_cplus |
fd5866f6 | 18350 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
18351 | && die_parent == NULL |
18352 | && has_children | |
18353 | && (tag == DW_TAG_class_type | |
18354 | || tag == DW_TAG_structure_type | |
18355 | || tag == DW_TAG_union_type)) | |
18356 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 18357 | |
53832f31 TT |
18358 | /* GCC might emit a nameless struct or union that has a linkage |
18359 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
18360 | if (name == NULL |
18361 | && (tag == DW_TAG_class_type | |
18362 | || tag == DW_TAG_interface_type | |
18363 | || tag == DW_TAG_structure_type | |
18364 | || tag == DW_TAG_union_type) | |
18365 | && linkage_name != NULL) | |
53832f31 | 18366 | { |
43816ebc TT |
18367 | gdb::unique_xmalloc_ptr<char> demangled |
18368 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
18369 | if (demangled != nullptr) | |
53832f31 | 18370 | { |
96408a79 SA |
18371 | const char *base; |
18372 | ||
18373 | /* Strip any leading namespaces/classes, keep only the base name. | |
18374 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
18375 | base = strrchr (demangled.get (), ':'); |
18376 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
18377 | base++; |
18378 | else | |
43816ebc | 18379 | base = demangled.get (); |
96408a79 | 18380 | |
518817b3 | 18381 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
021887d8 | 18382 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, base); |
53832f31 TT |
18383 | } |
18384 | } | |
18385 | ||
52356b79 | 18386 | fixup_called = 1; |
72bf9492 DJ |
18387 | } |
18388 | ||
18a8505e AT |
18389 | /* Process the attributes that had to be skipped in the first round. These |
18390 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
18391 | They could not have been processed in the first round, because at the time | |
18392 | the values of str_offsets_base or addr_base may not have been known. */ | |
18393 | void read_attribute_reprocess (const struct die_reader_specs *reader, | |
18394 | struct attribute *attr) | |
18395 | { | |
18396 | struct dwarf2_cu *cu = reader->cu; | |
18397 | switch (attr->form) | |
18398 | { | |
18399 | case DW_FORM_addrx: | |
18400 | case DW_FORM_GNU_addr_index: | |
18401 | DW_ADDR (attr) = read_addr_index (cu, DW_UNSND (attr)); | |
18402 | break; | |
18403 | case DW_FORM_strx: | |
18404 | case DW_FORM_strx1: | |
18405 | case DW_FORM_strx2: | |
18406 | case DW_FORM_strx3: | |
18407 | case DW_FORM_strx4: | |
18408 | case DW_FORM_GNU_str_index: | |
18409 | { | |
18410 | unsigned int str_index = DW_UNSND (attr); | |
18411 | if (reader->dwo_file != NULL) | |
18412 | { | |
18413 | DW_STRING (attr) = read_dwo_str_index (reader, str_index); | |
18414 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18415 | } | |
18416 | else | |
18417 | { | |
18418 | DW_STRING (attr) = read_stub_str_index (cu, str_index); | |
18419 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18420 | } | |
18421 | break; | |
18422 | } | |
18423 | default: | |
18424 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
18425 | } | |
18426 | } | |
18427 | ||
a8329558 | 18428 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18429 | |
d521ce57 | 18430 | static const gdb_byte * |
dee91e82 DE |
18431 | read_attribute_value (const struct die_reader_specs *reader, |
18432 | struct attribute *attr, unsigned form, | |
18a8505e AT |
18433 | LONGEST implicit_const, const gdb_byte *info_ptr, |
18434 | bool *need_reprocess) | |
c906108c | 18435 | { |
dee91e82 | 18436 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18437 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18438 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18439 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 18440 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 18441 | bfd *abfd = reader->abfd; |
e7c27a73 | 18442 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18443 | unsigned int bytes_read; |
18444 | struct dwarf_block *blk; | |
18a8505e | 18445 | *need_reprocess = false; |
c906108c | 18446 | |
aead7601 | 18447 | attr->form = (enum dwarf_form) form; |
a8329558 | 18448 | switch (form) |
c906108c | 18449 | { |
c906108c | 18450 | case DW_FORM_ref_addr: |
ae411497 | 18451 | if (cu->header.version == 2) |
c8a7a66f TT |
18452 | DW_UNSND (attr) = cu->header.read_address (abfd, info_ptr, |
18453 | &bytes_read); | |
ae411497 | 18454 | else |
8266302d TT |
18455 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, |
18456 | &bytes_read); | |
ae411497 TT |
18457 | info_ptr += bytes_read; |
18458 | break; | |
36586728 | 18459 | case DW_FORM_GNU_ref_alt: |
8266302d | 18460 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
36586728 TT |
18461 | info_ptr += bytes_read; |
18462 | break; | |
ae411497 | 18463 | case DW_FORM_addr: |
c8a7a66f | 18464 | DW_ADDR (attr) = cu->header.read_address (abfd, info_ptr, &bytes_read); |
3e29f34a | 18465 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 18466 | info_ptr += bytes_read; |
c906108c SS |
18467 | break; |
18468 | case DW_FORM_block2: | |
7b5a2f43 | 18469 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18470 | blk->size = read_2_bytes (abfd, info_ptr); |
18471 | info_ptr += 2; | |
18472 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18473 | info_ptr += blk->size; | |
18474 | DW_BLOCK (attr) = blk; | |
18475 | break; | |
18476 | case DW_FORM_block4: | |
7b5a2f43 | 18477 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18478 | blk->size = read_4_bytes (abfd, info_ptr); |
18479 | info_ptr += 4; | |
18480 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18481 | info_ptr += blk->size; | |
18482 | DW_BLOCK (attr) = blk; | |
18483 | break; | |
18484 | case DW_FORM_data2: | |
18485 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18486 | info_ptr += 2; | |
18487 | break; | |
18488 | case DW_FORM_data4: | |
18489 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18490 | info_ptr += 4; | |
18491 | break; | |
18492 | case DW_FORM_data8: | |
18493 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18494 | info_ptr += 8; | |
18495 | break; | |
0224619f JK |
18496 | case DW_FORM_data16: |
18497 | blk = dwarf_alloc_block (cu); | |
18498 | blk->size = 16; | |
18499 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18500 | info_ptr += 16; | |
18501 | DW_BLOCK (attr) = blk; | |
18502 | break; | |
2dc7f7b3 | 18503 | case DW_FORM_sec_offset: |
8266302d | 18504 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
2dc7f7b3 TT |
18505 | info_ptr += bytes_read; |
18506 | break; | |
c906108c | 18507 | case DW_FORM_string: |
9b1c24c8 | 18508 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 18509 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
18510 | info_ptr += bytes_read; |
18511 | break; | |
4bdf3d34 | 18512 | case DW_FORM_strp: |
36586728 TT |
18513 | if (!cu->per_cu->is_dwz) |
18514 | { | |
ed2dc618 SM |
18515 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
18516 | abfd, info_ptr, cu_header, | |
36586728 TT |
18517 | &bytes_read); |
18518 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18519 | info_ptr += bytes_read; | |
18520 | break; | |
18521 | } | |
18522 | /* FALLTHROUGH */ | |
43988095 JK |
18523 | case DW_FORM_line_strp: |
18524 | if (!cu->per_cu->is_dwz) | |
18525 | { | |
ed2dc618 SM |
18526 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
18527 | abfd, info_ptr, | |
43988095 JK |
18528 | cu_header, &bytes_read); |
18529 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18530 | info_ptr += bytes_read; | |
18531 | break; | |
18532 | } | |
18533 | /* FALLTHROUGH */ | |
36586728 TT |
18534 | case DW_FORM_GNU_strp_alt: |
18535 | { | |
ed2dc618 | 18536 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
8266302d TT |
18537 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
18538 | &bytes_read); | |
36586728 | 18539 | |
ed2dc618 SM |
18540 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
18541 | dwz, str_offset); | |
36586728 TT |
18542 | DW_STRING_IS_CANONICAL (attr) = 0; |
18543 | info_ptr += bytes_read; | |
18544 | } | |
4bdf3d34 | 18545 | break; |
2dc7f7b3 | 18546 | case DW_FORM_exprloc: |
c906108c | 18547 | case DW_FORM_block: |
7b5a2f43 | 18548 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18549 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18550 | info_ptr += bytes_read; | |
18551 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18552 | info_ptr += blk->size; | |
18553 | DW_BLOCK (attr) = blk; | |
18554 | break; | |
18555 | case DW_FORM_block1: | |
7b5a2f43 | 18556 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18557 | blk->size = read_1_byte (abfd, info_ptr); |
18558 | info_ptr += 1; | |
18559 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18560 | info_ptr += blk->size; | |
18561 | DW_BLOCK (attr) = blk; | |
18562 | break; | |
18563 | case DW_FORM_data1: | |
18564 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18565 | info_ptr += 1; | |
18566 | break; | |
18567 | case DW_FORM_flag: | |
18568 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18569 | info_ptr += 1; | |
18570 | break; | |
2dc7f7b3 TT |
18571 | case DW_FORM_flag_present: |
18572 | DW_UNSND (attr) = 1; | |
18573 | break; | |
c906108c SS |
18574 | case DW_FORM_sdata: |
18575 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18576 | info_ptr += bytes_read; | |
18577 | break; | |
18578 | case DW_FORM_udata: | |
18a8505e | 18579 | case DW_FORM_rnglistx: |
c906108c SS |
18580 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18581 | info_ptr += bytes_read; | |
18582 | break; | |
18583 | case DW_FORM_ref1: | |
9c541725 | 18584 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18585 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
18586 | info_ptr += 1; |
18587 | break; | |
18588 | case DW_FORM_ref2: | |
9c541725 | 18589 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18590 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
18591 | info_ptr += 2; |
18592 | break; | |
18593 | case DW_FORM_ref4: | |
9c541725 | 18594 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18595 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
18596 | info_ptr += 4; |
18597 | break; | |
613e1657 | 18598 | case DW_FORM_ref8: |
9c541725 | 18599 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18600 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
18601 | info_ptr += 8; |
18602 | break; | |
55f1336d | 18603 | case DW_FORM_ref_sig8: |
ac9ec31b | 18604 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
18605 | info_ptr += 8; |
18606 | break; | |
c906108c | 18607 | case DW_FORM_ref_udata: |
9c541725 | 18608 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18609 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
18610 | info_ptr += bytes_read; |
18611 | break; | |
c906108c | 18612 | case DW_FORM_indirect: |
a8329558 KW |
18613 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18614 | info_ptr += bytes_read; | |
43988095 JK |
18615 | if (form == DW_FORM_implicit_const) |
18616 | { | |
18617 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18618 | info_ptr += bytes_read; | |
18619 | } | |
18620 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
18a8505e | 18621 | info_ptr, need_reprocess); |
43988095 JK |
18622 | break; |
18623 | case DW_FORM_implicit_const: | |
18624 | DW_SND (attr) = implicit_const; | |
a8329558 | 18625 | break; |
336d760d | 18626 | case DW_FORM_addrx: |
3019eac3 | 18627 | case DW_FORM_GNU_addr_index: |
18a8505e AT |
18628 | *need_reprocess = true; |
18629 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
3019eac3 DE |
18630 | info_ptr += bytes_read; |
18631 | break; | |
cf532bd1 | 18632 | case DW_FORM_strx: |
15f18d14 AT |
18633 | case DW_FORM_strx1: |
18634 | case DW_FORM_strx2: | |
18635 | case DW_FORM_strx3: | |
18636 | case DW_FORM_strx4: | |
3019eac3 | 18637 | case DW_FORM_GNU_str_index: |
3019eac3 | 18638 | { |
15f18d14 AT |
18639 | ULONGEST str_index; |
18640 | if (form == DW_FORM_strx1) | |
18641 | { | |
18642 | str_index = read_1_byte (abfd, info_ptr); | |
18643 | info_ptr += 1; | |
18644 | } | |
18645 | else if (form == DW_FORM_strx2) | |
18646 | { | |
18647 | str_index = read_2_bytes (abfd, info_ptr); | |
18648 | info_ptr += 2; | |
18649 | } | |
18650 | else if (form == DW_FORM_strx3) | |
18651 | { | |
18652 | str_index = read_3_bytes (abfd, info_ptr); | |
18653 | info_ptr += 3; | |
18654 | } | |
18655 | else if (form == DW_FORM_strx4) | |
18656 | { | |
18657 | str_index = read_4_bytes (abfd, info_ptr); | |
18658 | info_ptr += 4; | |
18659 | } | |
18660 | else | |
18661 | { | |
18662 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
18663 | info_ptr += bytes_read; | |
18664 | } | |
18a8505e AT |
18665 | *need_reprocess = true; |
18666 | DW_UNSND (attr) = str_index; | |
18667 | } | |
3019eac3 | 18668 | break; |
c906108c | 18669 | default: |
8a3fe4f8 | 18670 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
18671 | dwarf_form_name (form), |
18672 | bfd_get_filename (abfd)); | |
c906108c | 18673 | } |
28e94949 | 18674 | |
36586728 | 18675 | /* Super hack. */ |
cd6c91b4 | 18676 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
18677 | attr->form = DW_FORM_GNU_ref_alt; |
18678 | ||
28e94949 JB |
18679 | /* We have seen instances where the compiler tried to emit a byte |
18680 | size attribute of -1 which ended up being encoded as an unsigned | |
18681 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
18682 | an object of this size seems pretty unlikely so we can relatively | |
18683 | safely treat these cases as if the size attribute was invalid and | |
18684 | treat them as zero by default. */ | |
18685 | if (attr->name == DW_AT_byte_size | |
18686 | && form == DW_FORM_data4 | |
18687 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
18688 | { |
18689 | complaint | |
b98664d3 | 18690 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 18691 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
18692 | DW_UNSND (attr) = 0; |
18693 | } | |
28e94949 | 18694 | |
c906108c SS |
18695 | return info_ptr; |
18696 | } | |
18697 | ||
a8329558 KW |
18698 | /* Read an attribute described by an abbreviated attribute. */ |
18699 | ||
d521ce57 | 18700 | static const gdb_byte * |
dee91e82 DE |
18701 | read_attribute (const struct die_reader_specs *reader, |
18702 | struct attribute *attr, struct attr_abbrev *abbrev, | |
18a8505e | 18703 | const gdb_byte *info_ptr, bool *need_reprocess) |
a8329558 KW |
18704 | { |
18705 | attr->name = abbrev->name; | |
43988095 | 18706 | return read_attribute_value (reader, attr, abbrev->form, |
18a8505e AT |
18707 | abbrev->implicit_const, info_ptr, |
18708 | need_reprocess); | |
a8329558 KW |
18709 | } |
18710 | ||
c764a876 DE |
18711 | /* Cover function for read_initial_length. |
18712 | Returns the length of the object at BUF, and stores the size of the | |
18713 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18714 | *OFFSET_SIZE. | |
18715 | If the initial length size is not equivalent to that specified in | |
18716 | CU_HEADER then issue a complaint. | |
18717 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18718 | |
c764a876 | 18719 | static LONGEST |
d521ce57 | 18720 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18721 | const struct comp_unit_head *cu_header, |
18722 | unsigned int *bytes_read, | |
18723 | unsigned int *offset_size) | |
18724 | { | |
18725 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18726 | ||
18727 | gdb_assert (cu_header->initial_length_size == 4 | |
18728 | || cu_header->initial_length_size == 8 | |
18729 | || cu_header->initial_length_size == 12); | |
18730 | ||
18731 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 18732 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 18733 | |
c764a876 | 18734 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18735 | return length; |
613e1657 KB |
18736 | } |
18737 | ||
43988095 JK |
18738 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
18739 | reporting strings FORM_NAME and SECT_NAME. */ | |
18740 | ||
d521ce57 | 18741 | static const char * |
ed2dc618 SM |
18742 | read_indirect_string_at_offset_from (struct objfile *objfile, |
18743 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
18744 | struct dwarf2_section_info *sect, |
18745 | const char *form_name, | |
18746 | const char *sect_name) | |
18747 | { | |
96b79293 | 18748 | sect->read (objfile); |
43988095 JK |
18749 | if (sect->buffer == NULL) |
18750 | error (_("%s used without %s section [in module %s]"), | |
18751 | form_name, sect_name, bfd_get_filename (abfd)); | |
18752 | if (str_offset >= sect->size) | |
18753 | error (_("%s pointing outside of %s section [in module %s]"), | |
18754 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 18755 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 18756 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 18757 | return NULL; |
43988095 JK |
18758 | return (const char *) (sect->buffer + str_offset); |
18759 | } | |
18760 | ||
18761 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
18762 | ||
18763 | static const char * | |
ed2dc618 SM |
18764 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18765 | bfd *abfd, LONGEST str_offset) | |
43988095 | 18766 | { |
ed2dc618 SM |
18767 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
18768 | abfd, str_offset, | |
43988095 JK |
18769 | &dwarf2_per_objfile->str, |
18770 | "DW_FORM_strp", ".debug_str"); | |
18771 | } | |
18772 | ||
18773 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
18774 | ||
18775 | static const char * | |
ed2dc618 SM |
18776 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18777 | bfd *abfd, LONGEST str_offset) | |
43988095 | 18778 | { |
ed2dc618 SM |
18779 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
18780 | abfd, str_offset, | |
43988095 JK |
18781 | &dwarf2_per_objfile->line_str, |
18782 | "DW_FORM_line_strp", | |
18783 | ".debug_line_str"); | |
c906108c SS |
18784 | } |
18785 | ||
36586728 TT |
18786 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
18787 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
18788 | the string consists of a single NUL byte, return NULL; otherwise | |
18789 | return a pointer to the string. */ | |
18790 | ||
d521ce57 | 18791 | static const char * |
ed2dc618 SM |
18792 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
18793 | LONGEST str_offset) | |
36586728 | 18794 | { |
96b79293 | 18795 | dwz->str.read (objfile); |
36586728 TT |
18796 | |
18797 | if (dwz->str.buffer == NULL) | |
18798 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
18799 | "section [in module %s]"), | |
00f93c44 | 18800 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
18801 | if (str_offset >= dwz->str.size) |
18802 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
18803 | ".debug_str section [in module %s]"), | |
00f93c44 | 18804 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
18805 | gdb_assert (HOST_CHAR_BIT == 8); |
18806 | if (dwz->str.buffer[str_offset] == '\0') | |
18807 | return NULL; | |
d521ce57 | 18808 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
18809 | } |
18810 | ||
43988095 JK |
18811 | /* Return pointer to string at .debug_str offset as read from BUF. |
18812 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18813 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18814 | ||
d521ce57 | 18815 | static const char * |
ed2dc618 SM |
18816 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
18817 | const gdb_byte *buf, | |
cf2c3c16 TT |
18818 | const struct comp_unit_head *cu_header, |
18819 | unsigned int *bytes_read_ptr) | |
18820 | { | |
8266302d | 18821 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 18822 | |
ed2dc618 | 18823 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
18824 | } |
18825 | ||
43988095 JK |
18826 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
18827 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18828 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18829 | ||
18830 | static const char * | |
ed2dc618 SM |
18831 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18832 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
18833 | const struct comp_unit_head *cu_header, |
18834 | unsigned int *bytes_read_ptr) | |
18835 | { | |
8266302d | 18836 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 18837 | |
ed2dc618 SM |
18838 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
18839 | str_offset); | |
43988095 JK |
18840 | } |
18841 | ||
3019eac3 | 18842 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 18843 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
18844 | ADDR_SIZE is the size of addresses from the CU header. */ |
18845 | ||
18846 | static CORE_ADDR | |
ed2dc618 | 18847 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e AT |
18848 | unsigned int addr_index, gdb::optional<ULONGEST> addr_base, |
18849 | int addr_size) | |
3019eac3 DE |
18850 | { |
18851 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18852 | bfd *abfd = objfile->obfd; | |
18853 | const gdb_byte *info_ptr; | |
18a8505e | 18854 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 18855 | |
96b79293 | 18856 | dwarf2_per_objfile->addr.read (objfile); |
3019eac3 DE |
18857 | if (dwarf2_per_objfile->addr.buffer == NULL) |
18858 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18859 | objfile_name (objfile)); |
18a8505e AT |
18860 | if (addr_base_or_zero + addr_index * addr_size |
18861 | >= dwarf2_per_objfile->addr.size) | |
3019eac3 DE |
18862 | error (_("DW_FORM_addr_index pointing outside of " |
18863 | ".debug_addr section [in module %s]"), | |
4262abfb | 18864 | objfile_name (objfile)); |
3019eac3 | 18865 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18a8505e | 18866 | + addr_base_or_zero + addr_index * addr_size); |
3019eac3 DE |
18867 | if (addr_size == 4) |
18868 | return bfd_get_32 (abfd, info_ptr); | |
18869 | else | |
18870 | return bfd_get_64 (abfd, info_ptr); | |
18871 | } | |
18872 | ||
18873 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18874 | ||
18875 | static CORE_ADDR | |
18876 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18877 | { | |
518817b3 SM |
18878 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
18879 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
18880 | } |
18881 | ||
18882 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18883 | ||
18884 | static CORE_ADDR | |
d521ce57 | 18885 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18886 | unsigned int *bytes_read) |
18887 | { | |
518817b3 | 18888 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
18889 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
18890 | ||
18891 | return read_addr_index (cu, addr_index); | |
18892 | } | |
18893 | ||
450a1bfc | 18894 | /* See read.h. */ |
3019eac3 DE |
18895 | |
18896 | CORE_ADDR | |
450a1bfc | 18897 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, unsigned int addr_index) |
3019eac3 | 18898 | { |
ed2dc618 | 18899 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 18900 | struct dwarf2_cu *cu = per_cu->cu; |
18a8505e | 18901 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
18902 | int addr_size; |
18903 | ||
3019eac3 DE |
18904 | /* We need addr_base and addr_size. |
18905 | If we don't have PER_CU->cu, we have to get it. | |
18906 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18907 | which at this point doesn't seem justified: it's not clear how frequently | |
18908 | it would get used and it would increase the size of every PER_CU. | |
18909 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18910 | so we're not in uncharted territory here. | |
18911 | Alas we need to be a bit more complicated as addr_base is contained | |
18912 | in the DIE. | |
18913 | ||
18914 | We don't need to read the entire CU(/TU). | |
18915 | We just need the header and top level die. | |
a1b64ce1 | 18916 | |
3019eac3 | 18917 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18918 | For now we skip this optimization. */ |
3019eac3 DE |
18919 | |
18920 | if (cu != NULL) | |
18921 | { | |
18922 | addr_base = cu->addr_base; | |
18923 | addr_size = cu->header.addr_size; | |
18924 | } | |
18925 | else | |
18926 | { | |
6751ebae | 18927 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
18928 | addr_base = reader.cu->addr_base; |
18929 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
18930 | } |
18931 | ||
ed2dc618 SM |
18932 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
18933 | addr_size); | |
3019eac3 DE |
18934 | } |
18935 | ||
18a8505e AT |
18936 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
18937 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
18938 | DWO file. */ | |
3019eac3 | 18939 | |
d521ce57 | 18940 | static const char * |
18a8505e AT |
18941 | read_str_index (struct dwarf2_cu *cu, |
18942 | struct dwarf2_section_info *str_section, | |
18943 | struct dwarf2_section_info *str_offsets_section, | |
18944 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 18945 | { |
518817b3 SM |
18946 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18947 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 18948 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 18949 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18950 | bfd *abfd = objfile->obfd; |
d521ce57 | 18951 | const gdb_byte *info_ptr; |
3019eac3 | 18952 | ULONGEST str_offset; |
cf532bd1 | 18953 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 18954 | |
96b79293 TT |
18955 | str_section->read (objfile); |
18956 | str_offsets_section->read (objfile); | |
73869dc2 | 18957 | if (str_section->buffer == NULL) |
18a8505e | 18958 | error (_("%s used without %s section" |
9d8780f0 | 18959 | " in CU at offset %s [in module %s]"), |
96b79293 | 18960 | form_name, str_section->get_name (), |
18a8505e | 18961 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18962 | if (str_offsets_section->buffer == NULL) |
18a8505e | 18963 | error (_("%s used without %s section" |
9d8780f0 | 18964 | " in CU at offset %s [in module %s]"), |
96b79293 | 18965 | form_name, str_section->get_name (), |
18a8505e | 18966 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18967 | info_ptr = (str_offsets_section->buffer |
18a8505e | 18968 | + str_offsets_base |
3019eac3 DE |
18969 | + str_index * cu->header.offset_size); |
18970 | if (cu->header.offset_size == 4) | |
18971 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18972 | else | |
18973 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18974 | if (str_offset >= str_section->size) |
57d63ce2 | 18975 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
18976 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
18977 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 18978 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18979 | } |
18980 | ||
18a8505e AT |
18981 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
18982 | ||
18983 | static const char * | |
18984 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
18985 | { | |
18986 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
18987 | ? reader->cu->header.addr_size : 0; | |
18988 | return read_str_index (reader->cu, | |
18989 | &reader->dwo_file->sections.str, | |
18990 | &reader->dwo_file->sections.str_offsets, | |
18991 | str_offsets_base, str_index); | |
18992 | } | |
18993 | ||
18994 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
18995 | ||
18996 | static const char * | |
18997 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
18998 | { | |
18999 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; | |
19000 | const char *objf_name = objfile_name (objfile); | |
19001 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
19002 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
19003 | ||
19004 | if (!cu->str_offsets_base.has_value ()) | |
19005 | error (_("%s used in Fission stub without %s" | |
19006 | " in CU at offset 0x%lx [in module %s]"), | |
19007 | form_name, str_offsets_attr_name, | |
19008 | (long) cu->header.offset_size, objf_name); | |
19009 | ||
19010 | return read_str_index (cu, | |
19011 | &cu->per_cu->dwarf2_per_objfile->str, | |
19012 | &cu->per_cu->dwarf2_per_objfile->str_offsets, | |
19013 | *cu->str_offsets_base, str_index); | |
19014 | } | |
19015 | ||
3019eac3 DE |
19016 | /* Return the length of an LEB128 number in BUF. */ |
19017 | ||
19018 | static int | |
19019 | leb128_size (const gdb_byte *buf) | |
19020 | { | |
19021 | const gdb_byte *begin = buf; | |
19022 | gdb_byte byte; | |
19023 | ||
19024 | while (1) | |
19025 | { | |
19026 | byte = *buf++; | |
19027 | if ((byte & 128) == 0) | |
19028 | return buf - begin; | |
19029 | } | |
19030 | } | |
19031 | ||
c906108c | 19032 | static void |
e142c38c | 19033 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
19034 | { |
19035 | switch (lang) | |
19036 | { | |
19037 | case DW_LANG_C89: | |
76bee0cc | 19038 | case DW_LANG_C99: |
0cfd832f | 19039 | case DW_LANG_C11: |
c906108c | 19040 | case DW_LANG_C: |
d1be3247 | 19041 | case DW_LANG_UPC: |
e142c38c | 19042 | cu->language = language_c; |
c906108c | 19043 | break; |
9c37b5ae | 19044 | case DW_LANG_Java: |
c906108c | 19045 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19046 | case DW_LANG_C_plus_plus_11: |
19047 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19048 | cu->language = language_cplus; |
c906108c | 19049 | break; |
6aecb9c2 JB |
19050 | case DW_LANG_D: |
19051 | cu->language = language_d; | |
19052 | break; | |
c906108c SS |
19053 | case DW_LANG_Fortran77: |
19054 | case DW_LANG_Fortran90: | |
b21b22e0 | 19055 | case DW_LANG_Fortran95: |
f7de9aab MW |
19056 | case DW_LANG_Fortran03: |
19057 | case DW_LANG_Fortran08: | |
e142c38c | 19058 | cu->language = language_fortran; |
c906108c | 19059 | break; |
a766d390 DE |
19060 | case DW_LANG_Go: |
19061 | cu->language = language_go; | |
19062 | break; | |
c906108c | 19063 | case DW_LANG_Mips_Assembler: |
e142c38c | 19064 | cu->language = language_asm; |
c906108c SS |
19065 | break; |
19066 | case DW_LANG_Ada83: | |
8aaf0b47 | 19067 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19068 | cu->language = language_ada; |
19069 | break; | |
72019c9c GM |
19070 | case DW_LANG_Modula2: |
19071 | cu->language = language_m2; | |
19072 | break; | |
fe8e67fd PM |
19073 | case DW_LANG_Pascal83: |
19074 | cu->language = language_pascal; | |
19075 | break; | |
22566fbd DJ |
19076 | case DW_LANG_ObjC: |
19077 | cu->language = language_objc; | |
19078 | break; | |
c44af4eb TT |
19079 | case DW_LANG_Rust: |
19080 | case DW_LANG_Rust_old: | |
19081 | cu->language = language_rust; | |
19082 | break; | |
c906108c SS |
19083 | case DW_LANG_Cobol74: |
19084 | case DW_LANG_Cobol85: | |
c906108c | 19085 | default: |
e142c38c | 19086 | cu->language = language_minimal; |
c906108c SS |
19087 | break; |
19088 | } | |
e142c38c | 19089 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19090 | } |
19091 | ||
19092 | /* Return the named attribute or NULL if not there. */ | |
19093 | ||
19094 | static struct attribute * | |
e142c38c | 19095 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19096 | { |
a48e046c | 19097 | for (;;) |
c906108c | 19098 | { |
a48e046c TT |
19099 | unsigned int i; |
19100 | struct attribute *spec = NULL; | |
19101 | ||
19102 | for (i = 0; i < die->num_attrs; ++i) | |
19103 | { | |
19104 | if (die->attrs[i].name == name) | |
19105 | return &die->attrs[i]; | |
19106 | if (die->attrs[i].name == DW_AT_specification | |
19107 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19108 | spec = &die->attrs[i]; | |
19109 | } | |
19110 | ||
19111 | if (!spec) | |
19112 | break; | |
c906108c | 19113 | |
f2f0e013 | 19114 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19115 | } |
c5aa993b | 19116 | |
c906108c SS |
19117 | return NULL; |
19118 | } | |
19119 | ||
348e048f DE |
19120 | /* Return the named attribute or NULL if not there, |
19121 | but do not follow DW_AT_specification, etc. | |
19122 | This is for use in contexts where we're reading .debug_types dies. | |
19123 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
19124 | back up the chain, and we want to go down. */ | |
19125 | ||
19126 | static struct attribute * | |
45e58e77 | 19127 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
19128 | { |
19129 | unsigned int i; | |
19130 | ||
19131 | for (i = 0; i < die->num_attrs; ++i) | |
19132 | if (die->attrs[i].name == name) | |
19133 | return &die->attrs[i]; | |
19134 | ||
19135 | return NULL; | |
19136 | } | |
19137 | ||
7d45c7c3 KB |
19138 | /* Return the string associated with a string-typed attribute, or NULL if it |
19139 | is either not found or is of an incorrect type. */ | |
19140 | ||
19141 | static const char * | |
19142 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19143 | { | |
19144 | struct attribute *attr; | |
19145 | const char *str = NULL; | |
19146 | ||
19147 | attr = dwarf2_attr (die, name, cu); | |
19148 | ||
19149 | if (attr != NULL) | |
19150 | { | |
43988095 | 19151 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 19152 | || attr->form == DW_FORM_string |
cf532bd1 | 19153 | || attr->form == DW_FORM_strx |
8fe0f950 AT |
19154 | || attr->form == DW_FORM_strx1 |
19155 | || attr->form == DW_FORM_strx2 | |
19156 | || attr->form == DW_FORM_strx3 | |
19157 | || attr->form == DW_FORM_strx4 | |
b3340438 | 19158 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 19159 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
19160 | str = DW_STRING (attr); |
19161 | else | |
b98664d3 | 19162 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
19163 | "DIE at %s in module %s"), |
19164 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 19165 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
19166 | } |
19167 | ||
19168 | return str; | |
19169 | } | |
19170 | ||
a084a2a6 | 19171 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 19172 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
19173 | static const char * |
19174 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
19175 | { | |
19176 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
19177 | if (dwo_name == nullptr) | |
19178 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
19179 | return dwo_name; | |
19180 | } | |
19181 | ||
05cf31d1 JB |
19182 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19183 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19184 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19185 | |
19186 | static int | |
19187 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19188 | { | |
19189 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19190 | ||
19191 | return (attr && DW_UNSND (attr)); | |
19192 | } | |
19193 | ||
3ca72b44 | 19194 | static int |
e142c38c | 19195 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19196 | { |
05cf31d1 JB |
19197 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19198 | which value is non-zero. However, we have to be careful with | |
19199 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19200 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19201 | end up accidently finding a declaration attribute that belongs | |
19202 | to a different DIE referenced by the specification attribute, | |
19203 | even though the given DIE does not have a declaration attribute. */ | |
19204 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19205 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19206 | } |
19207 | ||
63d06c5c | 19208 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19209 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19210 | containing the return value on output. If there is no |
19211 | specification, but there is an abstract origin, that is | |
19212 | returned. */ | |
63d06c5c DC |
19213 | |
19214 | static struct die_info * | |
f2f0e013 | 19215 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19216 | { |
f2f0e013 DJ |
19217 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19218 | *spec_cu); | |
63d06c5c | 19219 | |
edb3359d DJ |
19220 | if (spec_attr == NULL) |
19221 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19222 | ||
63d06c5c DC |
19223 | if (spec_attr == NULL) |
19224 | return NULL; | |
19225 | else | |
f2f0e013 | 19226 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19227 | } |
c906108c | 19228 | |
527f3840 JK |
19229 | /* Stub for free_line_header to match void * callback types. */ |
19230 | ||
19231 | static void | |
19232 | free_line_header_voidp (void *arg) | |
19233 | { | |
9a3c8263 | 19234 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19235 | |
fff8551c | 19236 | delete lh; |
527f3840 JK |
19237 | } |
19238 | ||
83769d0b | 19239 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19240 | |
19241 | static struct dwarf2_section_info * | |
19242 | get_debug_line_section (struct dwarf2_cu *cu) | |
19243 | { | |
19244 | struct dwarf2_section_info *section; | |
518817b3 SM |
19245 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19246 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
19247 | |
19248 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19249 | DWO file. */ | |
19250 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19251 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19252 | else if (cu->per_cu->is_dwz) | |
19253 | { | |
ed2dc618 | 19254 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19255 | |
19256 | section = &dwz->line; | |
19257 | } | |
19258 | else | |
19259 | section = &dwarf2_per_objfile->line; | |
19260 | ||
19261 | return section; | |
19262 | } | |
19263 | ||
43988095 JK |
19264 | /* Read directory or file name entry format, starting with byte of |
19265 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
19266 | entries count and the entries themselves in the described entry | |
19267 | format. */ | |
19268 | ||
19269 | static void | |
ed2dc618 SM |
19270 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19271 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
19272 | struct line_header *lh, |
19273 | const struct comp_unit_head *cu_header, | |
19274 | void (*callback) (struct line_header *lh, | |
19275 | const char *name, | |
ecfb656c | 19276 | dir_index d_index, |
43988095 JK |
19277 | unsigned int mod_time, |
19278 | unsigned int length)) | |
19279 | { | |
19280 | gdb_byte format_count, formati; | |
19281 | ULONGEST data_count, datai; | |
19282 | const gdb_byte *buf = *bufp; | |
19283 | const gdb_byte *format_header_data; | |
43988095 JK |
19284 | unsigned int bytes_read; |
19285 | ||
19286 | format_count = read_1_byte (abfd, buf); | |
19287 | buf += 1; | |
19288 | format_header_data = buf; | |
19289 | for (formati = 0; formati < format_count; formati++) | |
19290 | { | |
19291 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19292 | buf += bytes_read; | |
19293 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19294 | buf += bytes_read; | |
19295 | } | |
19296 | ||
19297 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19298 | buf += bytes_read; | |
19299 | for (datai = 0; datai < data_count; datai++) | |
19300 | { | |
19301 | const gdb_byte *format = format_header_data; | |
19302 | struct file_entry fe; | |
19303 | ||
43988095 JK |
19304 | for (formati = 0; formati < format_count; formati++) |
19305 | { | |
ecfb656c | 19306 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19307 | format += bytes_read; |
43988095 | 19308 | |
ecfb656c | 19309 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19310 | format += bytes_read; |
ecfb656c PA |
19311 | |
19312 | gdb::optional<const char *> string; | |
19313 | gdb::optional<unsigned int> uint; | |
19314 | ||
43988095 JK |
19315 | switch (form) |
19316 | { | |
19317 | case DW_FORM_string: | |
ecfb656c | 19318 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
19319 | buf += bytes_read; |
19320 | break; | |
19321 | ||
19322 | case DW_FORM_line_strp: | |
ed2dc618 SM |
19323 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
19324 | abfd, buf, | |
ecfb656c PA |
19325 | cu_header, |
19326 | &bytes_read)); | |
43988095 JK |
19327 | buf += bytes_read; |
19328 | break; | |
19329 | ||
19330 | case DW_FORM_data1: | |
ecfb656c | 19331 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
19332 | buf += 1; |
19333 | break; | |
19334 | ||
19335 | case DW_FORM_data2: | |
ecfb656c | 19336 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
19337 | buf += 2; |
19338 | break; | |
19339 | ||
19340 | case DW_FORM_data4: | |
ecfb656c | 19341 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
19342 | buf += 4; |
19343 | break; | |
19344 | ||
19345 | case DW_FORM_data8: | |
ecfb656c | 19346 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
19347 | buf += 8; |
19348 | break; | |
19349 | ||
7ba99d21 AT |
19350 | case DW_FORM_data16: |
19351 | /* This is used for MD5, but file_entry does not record MD5s. */ | |
19352 | buf += 16; | |
19353 | break; | |
19354 | ||
43988095 | 19355 | case DW_FORM_udata: |
ecfb656c | 19356 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
19357 | buf += bytes_read; |
19358 | break; | |
19359 | ||
19360 | case DW_FORM_block: | |
19361 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
19362 | current GDB. */ | |
19363 | break; | |
19364 | } | |
ecfb656c PA |
19365 | |
19366 | switch (content_type) | |
19367 | { | |
19368 | case DW_LNCT_path: | |
19369 | if (string.has_value ()) | |
19370 | fe.name = *string; | |
19371 | break; | |
19372 | case DW_LNCT_directory_index: | |
19373 | if (uint.has_value ()) | |
19374 | fe.d_index = (dir_index) *uint; | |
19375 | break; | |
19376 | case DW_LNCT_timestamp: | |
19377 | if (uint.has_value ()) | |
19378 | fe.mod_time = *uint; | |
19379 | break; | |
19380 | case DW_LNCT_size: | |
19381 | if (uint.has_value ()) | |
19382 | fe.length = *uint; | |
19383 | break; | |
19384 | case DW_LNCT_MD5: | |
19385 | break; | |
19386 | default: | |
b98664d3 | 19387 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
19388 | pulongest (content_type)); |
19389 | } | |
43988095 JK |
19390 | } |
19391 | ||
ecfb656c | 19392 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
19393 | } |
19394 | ||
19395 | *bufp = buf; | |
19396 | } | |
19397 | ||
debd256d | 19398 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 19399 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 19400 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
19401 | Returns NULL if there is a problem reading the header, e.g., if it |
19402 | has a version we don't understand. | |
debd256d JB |
19403 | |
19404 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
19405 | the returned object point into the dwarf line section buffer, |
19406 | and must not be freed. */ | |
ae2de4f8 | 19407 | |
fff8551c | 19408 | static line_header_up |
9c541725 | 19409 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 19410 | { |
d521ce57 | 19411 | const gdb_byte *line_ptr; |
c764a876 | 19412 | unsigned int bytes_read, offset_size; |
debd256d | 19413 | int i; |
d521ce57 | 19414 | const char *cur_dir, *cur_file; |
3019eac3 DE |
19415 | struct dwarf2_section_info *section; |
19416 | bfd *abfd; | |
518817b3 SM |
19417 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19418 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19419 | |
36586728 | 19420 | section = get_debug_line_section (cu); |
96b79293 | 19421 | section->read (dwarf2_per_objfile->objfile); |
3019eac3 | 19422 | if (section->buffer == NULL) |
debd256d | 19423 | { |
3019eac3 | 19424 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 19425 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 19426 | else |
b98664d3 | 19427 | complaint (_("missing .debug_line section")); |
debd256d JB |
19428 | return 0; |
19429 | } | |
19430 | ||
fceca515 DE |
19431 | /* We can't do this until we know the section is non-empty. |
19432 | Only then do we know we have such a section. */ | |
96b79293 | 19433 | abfd = section->get_bfd_owner (); |
fceca515 | 19434 | |
a738430d MK |
19435 | /* Make sure that at least there's room for the total_length field. |
19436 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 19437 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 19438 | { |
4d3c2250 | 19439 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19440 | return 0; |
19441 | } | |
19442 | ||
fff8551c | 19443 | line_header_up lh (new line_header ()); |
debd256d | 19444 | |
9c541725 | 19445 | lh->sect_off = sect_off; |
527f3840 JK |
19446 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
19447 | ||
9c541725 | 19448 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 19449 | |
a738430d | 19450 | /* Read in the header. */ |
6e70227d | 19451 | lh->total_length = |
c764a876 DE |
19452 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
19453 | &bytes_read, &offset_size); | |
debd256d | 19454 | line_ptr += bytes_read; |
7ba99d21 AT |
19455 | |
19456 | const gdb_byte *start_here = line_ptr; | |
19457 | ||
3019eac3 | 19458 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 19459 | { |
4d3c2250 | 19460 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19461 | return 0; |
19462 | } | |
7ba99d21 | 19463 | lh->statement_program_end = start_here + lh->total_length; |
debd256d JB |
19464 | lh->version = read_2_bytes (abfd, line_ptr); |
19465 | line_ptr += 2; | |
43988095 | 19466 | if (lh->version > 5) |
cd366ee8 DE |
19467 | { |
19468 | /* This is a version we don't understand. The format could have | |
19469 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 19470 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
19471 | return NULL; |
19472 | } | |
43988095 JK |
19473 | if (lh->version >= 5) |
19474 | { | |
19475 | gdb_byte segment_selector_size; | |
19476 | ||
19477 | /* Skip address size. */ | |
19478 | read_1_byte (abfd, line_ptr); | |
19479 | line_ptr += 1; | |
19480 | ||
19481 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
19482 | line_ptr += 1; | |
19483 | if (segment_selector_size != 0) | |
19484 | { | |
b98664d3 | 19485 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
19486 | "in .debug_line section"), |
19487 | segment_selector_size); | |
19488 | return NULL; | |
19489 | } | |
19490 | } | |
24aa364d | 19491 | lh->header_length = read_offset (abfd, line_ptr, offset_size); |
c764a876 | 19492 | line_ptr += offset_size; |
7ba99d21 | 19493 | lh->statement_program_start = line_ptr + lh->header_length; |
debd256d JB |
19494 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
19495 | line_ptr += 1; | |
2dc7f7b3 TT |
19496 | if (lh->version >= 4) |
19497 | { | |
19498 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
19499 | line_ptr += 1; | |
19500 | } | |
19501 | else | |
19502 | lh->maximum_ops_per_instruction = 1; | |
19503 | ||
19504 | if (lh->maximum_ops_per_instruction == 0) | |
19505 | { | |
19506 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 19507 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 19508 | "in `.debug_line' section")); |
2dc7f7b3 TT |
19509 | } |
19510 | ||
debd256d JB |
19511 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
19512 | line_ptr += 1; | |
19513 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
19514 | line_ptr += 1; | |
19515 | lh->line_range = read_1_byte (abfd, line_ptr); | |
19516 | line_ptr += 1; | |
19517 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
19518 | line_ptr += 1; | |
fff8551c | 19519 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
19520 | |
19521 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
19522 | for (i = 1; i < lh->opcode_base; ++i) | |
19523 | { | |
19524 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
19525 | line_ptr += 1; | |
19526 | } | |
19527 | ||
43988095 | 19528 | if (lh->version >= 5) |
debd256d | 19529 | { |
43988095 | 19530 | /* Read directory table. */ |
ed2dc618 SM |
19531 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19532 | &cu->header, | |
b926417a | 19533 | [] (struct line_header *header, const char *name, |
ecfb656c | 19534 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19535 | unsigned int length) |
19536 | { | |
b926417a | 19537 | header->add_include_dir (name); |
fff8551c | 19538 | }); |
debd256d | 19539 | |
43988095 | 19540 | /* Read file name table. */ |
ed2dc618 SM |
19541 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19542 | &cu->header, | |
b926417a | 19543 | [] (struct line_header *header, const char *name, |
ecfb656c | 19544 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19545 | unsigned int length) |
19546 | { | |
b926417a | 19547 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 19548 | }); |
43988095 JK |
19549 | } |
19550 | else | |
debd256d | 19551 | { |
43988095 JK |
19552 | /* Read directory table. */ |
19553 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19554 | { | |
19555 | line_ptr += bytes_read; | |
fff8551c | 19556 | lh->add_include_dir (cur_dir); |
43988095 | 19557 | } |
debd256d JB |
19558 | line_ptr += bytes_read; |
19559 | ||
43988095 JK |
19560 | /* Read file name table. */ |
19561 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19562 | { | |
ecfb656c PA |
19563 | unsigned int mod_time, length; |
19564 | dir_index d_index; | |
43988095 JK |
19565 | |
19566 | line_ptr += bytes_read; | |
ecfb656c | 19567 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
19568 | line_ptr += bytes_read; |
19569 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19570 | line_ptr += bytes_read; | |
19571 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19572 | line_ptr += bytes_read; | |
19573 | ||
ecfb656c | 19574 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
19575 | } |
19576 | line_ptr += bytes_read; | |
debd256d | 19577 | } |
debd256d | 19578 | |
3019eac3 | 19579 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 19580 | complaint (_("line number info header doesn't " |
3e43a32a | 19581 | "fit in `.debug_line' section")); |
debd256d | 19582 | |
debd256d JB |
19583 | return lh; |
19584 | } | |
c906108c | 19585 | |
c6da4cef | 19586 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 19587 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 19588 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
19589 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
19590 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 19591 | |
d521ce57 | 19592 | static const char * |
7ba99d21 | 19593 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 19594 | const dwarf2_psymtab *pst, |
c89b44cd TT |
19595 | const char *comp_dir, |
19596 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 19597 | { |
d521ce57 TT |
19598 | const char *include_name = fe.name; |
19599 | const char *include_name_to_compare = include_name; | |
72b9f47f | 19600 | const char *pst_filename; |
c6da4cef DE |
19601 | int file_is_pst; |
19602 | ||
8c43009f | 19603 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 19604 | |
c89b44cd | 19605 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
19606 | if (!IS_ABSOLUTE_PATH (include_name) |
19607 | && (dir_name != NULL || comp_dir != NULL)) | |
19608 | { | |
19609 | /* Avoid creating a duplicate psymtab for PST. | |
19610 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19611 | Before we do the comparison, however, we need to account | |
19612 | for DIR_NAME and COMP_DIR. | |
19613 | First prepend dir_name (if non-NULL). If we still don't | |
19614 | have an absolute path prepend comp_dir (if non-NULL). | |
19615 | However, the directory we record in the include-file's | |
19616 | psymtab does not contain COMP_DIR (to match the | |
19617 | corresponding symtab(s)). | |
19618 | ||
19619 | Example: | |
19620 | ||
19621 | bash$ cd /tmp | |
19622 | bash$ gcc -g ./hello.c | |
19623 | include_name = "hello.c" | |
19624 | dir_name = "." | |
19625 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19626 | DW_AT_name = "./hello.c" |
19627 | ||
19628 | */ | |
c6da4cef DE |
19629 | |
19630 | if (dir_name != NULL) | |
19631 | { | |
c89b44cd TT |
19632 | name_holder->reset (concat (dir_name, SLASH_STRING, |
19633 | include_name, (char *) NULL)); | |
19634 | include_name = name_holder->get (); | |
c6da4cef | 19635 | include_name_to_compare = include_name; |
c6da4cef DE |
19636 | } |
19637 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19638 | { | |
c89b44cd TT |
19639 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
19640 | include_name, (char *) NULL)); | |
19641 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
19642 | } |
19643 | } | |
19644 | ||
19645 | pst_filename = pst->filename; | |
c89b44cd | 19646 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
19647 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
19648 | { | |
c89b44cd TT |
19649 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
19650 | pst_filename, (char *) NULL)); | |
19651 | pst_filename = copied_name.get (); | |
c6da4cef DE |
19652 | } |
19653 | ||
1e3fad37 | 19654 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19655 | |
c6da4cef DE |
19656 | if (file_is_pst) |
19657 | return NULL; | |
19658 | return include_name; | |
19659 | } | |
19660 | ||
d9b3de22 DE |
19661 | /* State machine to track the state of the line number program. */ |
19662 | ||
6f77053d | 19663 | class lnp_state_machine |
d9b3de22 | 19664 | { |
6f77053d PA |
19665 | public: |
19666 | /* Initialize a machine state for the start of a line number | |
19667 | program. */ | |
804d2729 TT |
19668 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
19669 | bool record_lines_p); | |
6f77053d | 19670 | |
8c43009f PA |
19671 | file_entry *current_file () |
19672 | { | |
19673 | /* lh->file_names is 0-based, but the file name numbers in the | |
19674 | statement program are 1-based. */ | |
6f77053d PA |
19675 | return m_line_header->file_name_at (m_file); |
19676 | } | |
19677 | ||
19678 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19679 | we're processing the end of a sequence. */ | |
19680 | void record_line (bool end_sequence); | |
19681 | ||
7ab6656f OJ |
19682 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
19683 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
19684 | void check_line_address (struct dwarf2_cu *cu, |
19685 | const gdb_byte *line_ptr, | |
7ab6656f | 19686 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
19687 | |
19688 | void handle_set_discriminator (unsigned int discriminator) | |
19689 | { | |
19690 | m_discriminator = discriminator; | |
19691 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19692 | } | |
19693 | ||
19694 | /* Handle DW_LNE_set_address. */ | |
19695 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19696 | { | |
19697 | m_op_index = 0; | |
19698 | address += baseaddr; | |
19699 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19700 | } | |
19701 | ||
19702 | /* Handle DW_LNS_advance_pc. */ | |
19703 | void handle_advance_pc (CORE_ADDR adjust); | |
19704 | ||
19705 | /* Handle a special opcode. */ | |
19706 | void handle_special_opcode (unsigned char op_code); | |
19707 | ||
19708 | /* Handle DW_LNS_advance_line. */ | |
19709 | void handle_advance_line (int line_delta) | |
19710 | { | |
19711 | advance_line (line_delta); | |
19712 | } | |
19713 | ||
19714 | /* Handle DW_LNS_set_file. */ | |
19715 | void handle_set_file (file_name_index file); | |
19716 | ||
19717 | /* Handle DW_LNS_negate_stmt. */ | |
19718 | void handle_negate_stmt () | |
19719 | { | |
19720 | m_is_stmt = !m_is_stmt; | |
19721 | } | |
19722 | ||
19723 | /* Handle DW_LNS_const_add_pc. */ | |
19724 | void handle_const_add_pc (); | |
19725 | ||
19726 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19727 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19728 | { | |
19729 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19730 | m_op_index = 0; | |
19731 | } | |
19732 | ||
19733 | /* Handle DW_LNS_copy. */ | |
19734 | void handle_copy () | |
19735 | { | |
19736 | record_line (false); | |
19737 | m_discriminator = 0; | |
19738 | } | |
19739 | ||
19740 | /* Handle DW_LNE_end_sequence. */ | |
19741 | void handle_end_sequence () | |
19742 | { | |
804d2729 | 19743 | m_currently_recording_lines = true; |
6f77053d PA |
19744 | } |
19745 | ||
19746 | private: | |
19747 | /* Advance the line by LINE_DELTA. */ | |
19748 | void advance_line (int line_delta) | |
19749 | { | |
19750 | m_line += line_delta; | |
19751 | ||
19752 | if (line_delta != 0) | |
19753 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19754 | } |
19755 | ||
804d2729 TT |
19756 | struct dwarf2_cu *m_cu; |
19757 | ||
6f77053d PA |
19758 | gdbarch *m_gdbarch; |
19759 | ||
19760 | /* True if we're recording lines. | |
19761 | Otherwise we're building partial symtabs and are just interested in | |
19762 | finding include files mentioned by the line number program. */ | |
19763 | bool m_record_lines_p; | |
19764 | ||
8c43009f | 19765 | /* The line number header. */ |
6f77053d | 19766 | line_header *m_line_header; |
8c43009f | 19767 | |
6f77053d PA |
19768 | /* These are part of the standard DWARF line number state machine, |
19769 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19770 | |
6f77053d | 19771 | unsigned char m_op_index = 0; |
7ba99d21 AT |
19772 | /* The line table index of the current file. */ |
19773 | file_name_index m_file = 1; | |
6f77053d PA |
19774 | unsigned int m_line = 1; |
19775 | ||
19776 | /* These are initialized in the constructor. */ | |
19777 | ||
19778 | CORE_ADDR m_address; | |
19779 | bool m_is_stmt; | |
19780 | unsigned int m_discriminator; | |
d9b3de22 DE |
19781 | |
19782 | /* Additional bits of state we need to track. */ | |
19783 | ||
19784 | /* The last file that we called dwarf2_start_subfile for. | |
19785 | This is only used for TLLs. */ | |
6f77053d | 19786 | unsigned int m_last_file = 0; |
d9b3de22 | 19787 | /* The last file a line number was recorded for. */ |
6f77053d | 19788 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 19789 | |
804d2729 TT |
19790 | /* When true, record the lines we decode. */ |
19791 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
19792 | |
19793 | /* The last line number that was recorded, used to coalesce | |
19794 | consecutive entries for the same line. This can happen, for | |
19795 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19796 | unsigned int m_last_line = 0; |
19797 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19798 | }; |
d9b3de22 | 19799 | |
6f77053d PA |
19800 | void |
19801 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19802 | { | |
19803 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19804 | / m_line_header->maximum_ops_per_instruction) | |
19805 | * m_line_header->minimum_instruction_length); | |
19806 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19807 | m_op_index = ((m_op_index + adjust) | |
19808 | % m_line_header->maximum_ops_per_instruction); | |
19809 | } | |
d9b3de22 | 19810 | |
6f77053d PA |
19811 | void |
19812 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19813 | { |
6f77053d | 19814 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
19815 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
19816 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
19817 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
19818 | / m_line_header->maximum_ops_per_instruction) |
19819 | * m_line_header->minimum_instruction_length); | |
19820 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 19821 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 19822 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 19823 | |
258bf0ee | 19824 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
19825 | advance_line (line_delta); |
19826 | record_line (false); | |
19827 | m_discriminator = 0; | |
19828 | } | |
d9b3de22 | 19829 | |
6f77053d PA |
19830 | void |
19831 | lnp_state_machine::handle_set_file (file_name_index file) | |
19832 | { | |
19833 | m_file = file; | |
19834 | ||
19835 | const file_entry *fe = current_file (); | |
19836 | if (fe == NULL) | |
19837 | dwarf2_debug_line_missing_file_complaint (); | |
19838 | else if (m_record_lines_p) | |
19839 | { | |
19840 | const char *dir = fe->include_dir (m_line_header); | |
19841 | ||
c24bdb02 | 19842 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 19843 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 19844 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
19845 | } |
19846 | } | |
19847 | ||
19848 | void | |
19849 | lnp_state_machine::handle_const_add_pc () | |
19850 | { | |
19851 | CORE_ADDR adjust | |
19852 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19853 | ||
19854 | CORE_ADDR addr_adj | |
19855 | = (((m_op_index + adjust) | |
19856 | / m_line_header->maximum_ops_per_instruction) | |
19857 | * m_line_header->minimum_instruction_length); | |
19858 | ||
19859 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19860 | m_op_index = ((m_op_index + adjust) | |
19861 | % m_line_header->maximum_ops_per_instruction); | |
19862 | } | |
d9b3de22 | 19863 | |
a05a36a5 DE |
19864 | /* Return non-zero if we should add LINE to the line number table. |
19865 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19866 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19867 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19868 | had a non-zero discriminator. | |
19869 | ||
19870 | We have to be careful in the presence of discriminators. | |
19871 | E.g., for this line: | |
19872 | ||
19873 | for (i = 0; i < 100000; i++); | |
19874 | ||
19875 | clang can emit four line number entries for that one line, | |
19876 | each with a different discriminator. | |
19877 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19878 | ||
19879 | However, we want gdb to coalesce all four entries into one. | |
19880 | Otherwise the user could stepi into the middle of the line and | |
19881 | gdb would get confused about whether the pc really was in the | |
19882 | middle of the line. | |
19883 | ||
19884 | Things are further complicated by the fact that two consecutive | |
19885 | line number entries for the same line is a heuristic used by gcc | |
19886 | to denote the end of the prologue. So we can't just discard duplicate | |
19887 | entries, we have to be selective about it. The heuristic we use is | |
19888 | that we only collapse consecutive entries for the same line if at least | |
19889 | one of those entries has a non-zero discriminator. PR 17276. | |
19890 | ||
19891 | Note: Addresses in the line number state machine can never go backwards | |
19892 | within one sequence, thus this coalescing is ok. */ | |
19893 | ||
19894 | static int | |
804d2729 TT |
19895 | dwarf_record_line_p (struct dwarf2_cu *cu, |
19896 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
19897 | int line_has_non_zero_discriminator, |
19898 | struct subfile *last_subfile) | |
19899 | { | |
c24bdb02 | 19900 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
19901 | return 1; |
19902 | if (line != last_line) | |
19903 | return 1; | |
19904 | /* Same line for the same file that we've seen already. | |
19905 | As a last check, for pr 17276, only record the line if the line | |
19906 | has never had a non-zero discriminator. */ | |
19907 | if (!line_has_non_zero_discriminator) | |
19908 | return 1; | |
19909 | return 0; | |
19910 | } | |
19911 | ||
804d2729 TT |
19912 | /* Use the CU's builder to record line number LINE beginning at |
19913 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
19914 | |
19915 | static void | |
d9b3de22 DE |
19916 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
19917 | unsigned int line, CORE_ADDR address, | |
804d2729 | 19918 | struct dwarf2_cu *cu) |
252a6764 DE |
19919 | { |
19920 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19921 | ||
27e0867f DE |
19922 | if (dwarf_line_debug) |
19923 | { | |
19924 | fprintf_unfiltered (gdb_stdlog, | |
19925 | "Recording line %u, file %s, address %s\n", | |
19926 | line, lbasename (subfile->name), | |
19927 | paddress (gdbarch, address)); | |
19928 | } | |
19929 | ||
804d2729 | 19930 | if (cu != nullptr) |
c24bdb02 | 19931 | cu->get_builder ()->record_line (subfile, line, addr); |
252a6764 DE |
19932 | } |
19933 | ||
19934 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19935 | Mark the end of a set of line number records. | |
d9b3de22 | 19936 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19937 | If SUBFILE is NULL the request is ignored. */ |
19938 | ||
19939 | static void | |
19940 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 19941 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 19942 | { |
27e0867f DE |
19943 | if (subfile == NULL) |
19944 | return; | |
19945 | ||
19946 | if (dwarf_line_debug) | |
19947 | { | |
19948 | fprintf_unfiltered (gdb_stdlog, | |
19949 | "Finishing current line, file %s, address %s\n", | |
19950 | lbasename (subfile->name), | |
19951 | paddress (gdbarch, address)); | |
19952 | } | |
19953 | ||
804d2729 | 19954 | dwarf_record_line_1 (gdbarch, subfile, 0, address, cu); |
d9b3de22 DE |
19955 | } |
19956 | ||
6f77053d PA |
19957 | void |
19958 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19959 | { |
d9b3de22 DE |
19960 | if (dwarf_line_debug) |
19961 | { | |
19962 | fprintf_unfiltered (gdb_stdlog, | |
19963 | "Processing actual line %u: file %u," | |
94a72be7 | 19964 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 19965 | m_line, m_file, |
6f77053d | 19966 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
19967 | m_is_stmt, m_discriminator, |
19968 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
19969 | } |
19970 | ||
6f77053d | 19971 | file_entry *fe = current_file (); |
8c43009f PA |
19972 | |
19973 | if (fe == NULL) | |
d9b3de22 DE |
19974 | dwarf2_debug_line_missing_file_complaint (); |
19975 | /* For now we ignore lines not starting on an instruction boundary. | |
19976 | But not when processing end_sequence for compatibility with the | |
19977 | previous version of the code. */ | |
6f77053d | 19978 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19979 | { |
8c43009f | 19980 | fe->included_p = 1; |
94a72be7 AB |
19981 | if (m_record_lines_p |
19982 | && (producer_is_codewarrior (m_cu) || m_is_stmt || end_sequence)) | |
d9b3de22 | 19983 | { |
c24bdb02 | 19984 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 19985 | || end_sequence) |
d9b3de22 | 19986 | { |
804d2729 TT |
19987 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
19988 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
19989 | } |
19990 | ||
19991 | if (!end_sequence) | |
19992 | { | |
804d2729 | 19993 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
19994 | m_line_has_non_zero_discriminator, |
19995 | m_last_subfile)) | |
d9b3de22 | 19996 | { |
c24bdb02 | 19997 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 19998 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 19999 | builder->get_current_subfile (), |
6f77053d | 20000 | m_line, m_address, |
804d2729 | 20001 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 20002 | } |
c24bdb02 | 20003 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20004 | m_last_line = m_line; |
d9b3de22 DE |
20005 | } |
20006 | } | |
20007 | } | |
20008 | } | |
20009 | ||
804d2729 TT |
20010 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
20011 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 20012 | { |
804d2729 | 20013 | m_cu = cu; |
6f77053d PA |
20014 | m_gdbarch = arch; |
20015 | m_record_lines_p = record_lines_p; | |
20016 | m_line_header = lh; | |
d9b3de22 | 20017 | |
804d2729 | 20018 | m_currently_recording_lines = true; |
d9b3de22 | 20019 | |
d9b3de22 DE |
20020 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
20021 | was a line entry for it so that the backend has a chance to adjust it | |
20022 | and also record it in case it needs it. This is currently used by MIPS | |
20023 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
20024 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
20025 | m_is_stmt = lh->default_is_stmt; | |
20026 | m_discriminator = 0; | |
252a6764 DE |
20027 | } |
20028 | ||
6f77053d PA |
20029 | void |
20030 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
20031 | const gdb_byte *line_ptr, | |
7ab6656f | 20032 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 20033 | { |
7ab6656f OJ |
20034 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
20035 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
20036 | values of zero to preserve GDB's previous behaviour which is to handle | |
20037 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 20038 | |
7ab6656f | 20039 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
20040 | { |
20041 | /* This line table is for a function which has been | |
20042 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20043 | ||
518817b3 | 20044 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
20045 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
20046 | ||
b98664d3 | 20047 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 20048 | line_offset, objfile_name (objfile)); |
804d2729 TT |
20049 | m_currently_recording_lines = false; |
20050 | /* Note: m_currently_recording_lines is left as false until we see | |
20051 | DW_LNE_end_sequence. */ | |
924c2928 DE |
20052 | } |
20053 | } | |
20054 | ||
f3f5162e | 20055 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20056 | Process the line number information in LH. |
20057 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20058 | program in order to set included_p for every referenced header. */ | |
debd256d | 20059 | |
c906108c | 20060 | static void |
43f3e411 DE |
20061 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20062 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20063 | { |
d521ce57 TT |
20064 | const gdb_byte *line_ptr, *extended_end; |
20065 | const gdb_byte *line_end; | |
a8c50c1f | 20066 | unsigned int bytes_read, extended_len; |
699ca60a | 20067 | unsigned char op_code, extended_op; |
e142c38c | 20068 | CORE_ADDR baseaddr; |
518817b3 | 20069 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20070 | bfd *abfd = objfile->obfd; |
fbf65064 | 20071 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
20072 | /* True if we're recording line info (as opposed to building partial |
20073 | symtabs and just interested in finding include files mentioned by | |
20074 | the line number program). */ | |
20075 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 20076 | |
b3b3bada | 20077 | baseaddr = objfile->text_section_offset (); |
c906108c | 20078 | |
debd256d JB |
20079 | line_ptr = lh->statement_program_start; |
20080 | line_end = lh->statement_program_end; | |
c906108c SS |
20081 | |
20082 | /* Read the statement sequences until there's nothing left. */ | |
20083 | while (line_ptr < line_end) | |
20084 | { | |
6f77053d PA |
20085 | /* The DWARF line number program state machine. Reset the state |
20086 | machine at the start of each sequence. */ | |
804d2729 | 20087 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 20088 | bool end_sequence = false; |
d9b3de22 | 20089 | |
8c43009f | 20090 | if (record_lines_p) |
c906108c | 20091 | { |
8c43009f PA |
20092 | /* Start a subfile for the current file of the state |
20093 | machine. */ | |
20094 | const file_entry *fe = state_machine.current_file (); | |
20095 | ||
20096 | if (fe != NULL) | |
804d2729 | 20097 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
20098 | } |
20099 | ||
a738430d | 20100 | /* Decode the table. */ |
d9b3de22 | 20101 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20102 | { |
20103 | op_code = read_1_byte (abfd, line_ptr); | |
20104 | line_ptr += 1; | |
9aa1fe7e | 20105 | |
debd256d | 20106 | if (op_code >= lh->opcode_base) |
6e70227d | 20107 | { |
8e07a239 | 20108 | /* Special opcode. */ |
6f77053d | 20109 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20110 | } |
20111 | else switch (op_code) | |
c906108c SS |
20112 | { |
20113 | case DW_LNS_extended_op: | |
3e43a32a MS |
20114 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20115 | &bytes_read); | |
473b7be6 | 20116 | line_ptr += bytes_read; |
a8c50c1f | 20117 | extended_end = line_ptr + extended_len; |
c906108c SS |
20118 | extended_op = read_1_byte (abfd, line_ptr); |
20119 | line_ptr += 1; | |
20120 | switch (extended_op) | |
20121 | { | |
20122 | case DW_LNE_end_sequence: | |
6f77053d PA |
20123 | state_machine.handle_end_sequence (); |
20124 | end_sequence = true; | |
c906108c SS |
20125 | break; |
20126 | case DW_LNE_set_address: | |
d9b3de22 DE |
20127 | { |
20128 | CORE_ADDR address | |
c8a7a66f | 20129 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 20130 | line_ptr += bytes_read; |
6f77053d PA |
20131 | |
20132 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 20133 | lowpc - baseaddr, address); |
6f77053d | 20134 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 20135 | } |
c906108c SS |
20136 | break; |
20137 | case DW_LNE_define_file: | |
debd256d | 20138 | { |
d521ce57 | 20139 | const char *cur_file; |
ecfb656c PA |
20140 | unsigned int mod_time, length; |
20141 | dir_index dindex; | |
6e70227d | 20142 | |
3e43a32a MS |
20143 | cur_file = read_direct_string (abfd, line_ptr, |
20144 | &bytes_read); | |
debd256d | 20145 | line_ptr += bytes_read; |
ecfb656c | 20146 | dindex = (dir_index) |
debd256d JB |
20147 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20148 | line_ptr += bytes_read; | |
20149 | mod_time = | |
20150 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20151 | line_ptr += bytes_read; | |
20152 | length = | |
20153 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20154 | line_ptr += bytes_read; | |
ecfb656c | 20155 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20156 | } |
c906108c | 20157 | break; |
d0c6ba3d | 20158 | case DW_LNE_set_discriminator: |
6f77053d PA |
20159 | { |
20160 | /* The discriminator is not interesting to the | |
20161 | debugger; just ignore it. We still need to | |
20162 | check its value though: | |
20163 | if there are consecutive entries for the same | |
20164 | (non-prologue) line we want to coalesce them. | |
20165 | PR 17276. */ | |
20166 | unsigned int discr | |
20167 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20168 | line_ptr += bytes_read; | |
20169 | ||
20170 | state_machine.handle_set_discriminator (discr); | |
20171 | } | |
d0c6ba3d | 20172 | break; |
c906108c | 20173 | default: |
b98664d3 | 20174 | complaint (_("mangled .debug_line section")); |
debd256d | 20175 | return; |
c906108c | 20176 | } |
a8c50c1f DJ |
20177 | /* Make sure that we parsed the extended op correctly. If e.g. |
20178 | we expected a different address size than the producer used, | |
20179 | we may have read the wrong number of bytes. */ | |
20180 | if (line_ptr != extended_end) | |
20181 | { | |
b98664d3 | 20182 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
20183 | return; |
20184 | } | |
c906108c SS |
20185 | break; |
20186 | case DW_LNS_copy: | |
6f77053d | 20187 | state_machine.handle_copy (); |
c906108c SS |
20188 | break; |
20189 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20190 | { |
20191 | CORE_ADDR adjust | |
20192 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20193 | line_ptr += bytes_read; |
6f77053d PA |
20194 | |
20195 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20196 | } |
c906108c SS |
20197 | break; |
20198 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20199 | { |
20200 | int line_delta | |
20201 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20202 | line_ptr += bytes_read; |
6f77053d PA |
20203 | |
20204 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20205 | } |
c906108c SS |
20206 | break; |
20207 | case DW_LNS_set_file: | |
d9b3de22 | 20208 | { |
6f77053d | 20209 | file_name_index file |
ecfb656c PA |
20210 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20211 | &bytes_read); | |
d9b3de22 | 20212 | line_ptr += bytes_read; |
8c43009f | 20213 | |
6f77053d | 20214 | state_machine.handle_set_file (file); |
d9b3de22 | 20215 | } |
c906108c SS |
20216 | break; |
20217 | case DW_LNS_set_column: | |
0ad93d4f | 20218 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20219 | line_ptr += bytes_read; |
20220 | break; | |
20221 | case DW_LNS_negate_stmt: | |
6f77053d | 20222 | state_machine.handle_negate_stmt (); |
c906108c SS |
20223 | break; |
20224 | case DW_LNS_set_basic_block: | |
c906108c | 20225 | break; |
c2c6d25f JM |
20226 | /* Add to the address register of the state machine the |
20227 | address increment value corresponding to special opcode | |
a738430d MK |
20228 | 255. I.e., this value is scaled by the minimum |
20229 | instruction length since special opcode 255 would have | |
b021a221 | 20230 | scaled the increment. */ |
c906108c | 20231 | case DW_LNS_const_add_pc: |
6f77053d | 20232 | state_machine.handle_const_add_pc (); |
c906108c SS |
20233 | break; |
20234 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20235 | { |
6f77053d | 20236 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20237 | line_ptr += 2; |
6f77053d PA |
20238 | |
20239 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20240 | } |
c906108c | 20241 | break; |
9aa1fe7e | 20242 | default: |
a738430d MK |
20243 | { |
20244 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20245 | int i; |
a738430d | 20246 | |
debd256d | 20247 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20248 | { |
20249 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20250 | line_ptr += bytes_read; | |
20251 | } | |
20252 | } | |
c906108c SS |
20253 | } |
20254 | } | |
d9b3de22 DE |
20255 | |
20256 | if (!end_sequence) | |
20257 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20258 | ||
20259 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20260 | in which case we still finish recording the last line). */ | |
6f77053d | 20261 | state_machine.record_line (true); |
c906108c | 20262 | } |
f3f5162e DE |
20263 | } |
20264 | ||
20265 | /* Decode the Line Number Program (LNP) for the given line_header | |
20266 | structure and CU. The actual information extracted and the type | |
20267 | of structures created from the LNP depends on the value of PST. | |
20268 | ||
20269 | 1. If PST is NULL, then this procedure uses the data from the program | |
20270 | to create all necessary symbol tables, and their linetables. | |
20271 | ||
20272 | 2. If PST is not NULL, this procedure reads the program to determine | |
20273 | the list of files included by the unit represented by PST, and | |
20274 | builds all the associated partial symbol tables. | |
20275 | ||
20276 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20277 | It is used for relative paths in the line table. | |
20278 | NOTE: When processing partial symtabs (pst != NULL), | |
20279 | comp_dir == pst->dirname. | |
20280 | ||
20281 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20282 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20283 | symtab we don't use it in the name of the psymtabs we create. | |
20284 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20285 | A good testcase for this is mb-inline.exp. |
20286 | ||
527f3840 JK |
20287 | LOWPC is the lowest address in CU (or 0 if not known). |
20288 | ||
20289 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20290 | for its PC<->lines mapping information. Otherwise only the filename | |
20291 | table is read in. */ | |
f3f5162e DE |
20292 | |
20293 | static void | |
20294 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 20295 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 20296 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 20297 | { |
518817b3 | 20298 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20299 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 20300 | |
527f3840 JK |
20301 | if (decode_mapping) |
20302 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20303 | |
20304 | if (decode_for_pst_p) | |
20305 | { | |
aaa75496 JB |
20306 | /* Now that we're done scanning the Line Header Program, we can |
20307 | create the psymtab of each included file. */ | |
7ba99d21 AT |
20308 | for (auto &file_entry : lh->file_names ()) |
20309 | if (file_entry.included_p == 1) | |
aaa75496 | 20310 | { |
c89b44cd | 20311 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 20312 | const char *include_name = |
7ba99d21 AT |
20313 | psymtab_include_file_name (lh, file_entry, pst, |
20314 | comp_dir, &name_holder); | |
c6da4cef | 20315 | if (include_name != NULL) |
aaa75496 JB |
20316 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20317 | } | |
20318 | } | |
cb1df416 DJ |
20319 | else |
20320 | { | |
20321 | /* Make sure a symtab is created for every file, even files | |
20322 | which contain only variables (i.e. no code with associated | |
20323 | line numbers). */ | |
c24bdb02 KS |
20324 | buildsym_compunit *builder = cu->get_builder (); |
20325 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 20326 | |
7ba99d21 | 20327 | for (auto &fe : lh->file_names ()) |
cb1df416 | 20328 | { |
804d2729 | 20329 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 20330 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 20331 | { |
c24bdb02 | 20332 | builder->get_current_subfile ()->symtab |
804d2729 | 20333 | = allocate_symtab (cust, |
c24bdb02 | 20334 | builder->get_current_subfile ()->name); |
43f3e411 | 20335 | } |
c24bdb02 | 20336 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
20337 | } |
20338 | } | |
c906108c SS |
20339 | } |
20340 | ||
20341 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
20342 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 20343 | or NULL if not known. |
c906108c SS |
20344 | This routine tries to keep line numbers from identical absolute and |
20345 | relative file names in a common subfile. | |
20346 | ||
20347 | Using the `list' example from the GDB testsuite, which resides in | |
20348 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
20349 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
20350 | ||
c5aa993b | 20351 | DW_AT_name: /srcdir/list0.c |
4d663531 | 20352 | DW_AT_comp_dir: /compdir |
357e46e7 | 20353 | files.files[0].name: list0.h |
c5aa993b | 20354 | files.files[0].dir: /srcdir |
357e46e7 | 20355 | files.files[1].name: list0.c |
c5aa993b | 20356 | files.files[1].dir: /srcdir |
c906108c SS |
20357 | |
20358 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
20359 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
20360 | start_subfile will ensure that this happens provided that we pass the | |
20361 | concatenation of files.files[1].dir and files.files[1].name as the | |
20362 | subfile's name. */ | |
c906108c SS |
20363 | |
20364 | static void | |
804d2729 TT |
20365 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
20366 | const char *dirname) | |
c906108c | 20367 | { |
43816ebc | 20368 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 20369 | |
4d663531 | 20370 | /* In order not to lose the line information directory, |
4f1520fb FR |
20371 | we concatenate it to the filename when it makes sense. |
20372 | Note that the Dwarf3 standard says (speaking of filenames in line | |
20373 | information): ``The directory index is ignored for file names | |
20374 | that represent full path names''. Thus ignoring dirname in the | |
20375 | `else' branch below isn't an issue. */ | |
c906108c | 20376 | |
d5166ae1 | 20377 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 20378 | { |
43816ebc TT |
20379 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
20380 | filename = copy.get (); | |
d521ce57 | 20381 | } |
c906108c | 20382 | |
c24bdb02 | 20383 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
20384 | } |
20385 | ||
804d2729 TT |
20386 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
20387 | buildsym_compunit constructor. */ | |
f4dc4d17 | 20388 | |
c24bdb02 KS |
20389 | struct compunit_symtab * |
20390 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
20391 | CORE_ADDR low_pc) | |
f4dc4d17 | 20392 | { |
c24bdb02 | 20393 | gdb_assert (m_builder == nullptr); |
43f3e411 | 20394 | |
c24bdb02 KS |
20395 | m_builder.reset (new struct buildsym_compunit |
20396 | (per_cu->dwarf2_per_objfile->objfile, | |
20397 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 20398 | |
c24bdb02 | 20399 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 20400 | |
c24bdb02 KS |
20401 | get_builder ()->record_debugformat ("DWARF 2"); |
20402 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 20403 | |
c24bdb02 | 20404 | processing_has_namespace_info = false; |
43f3e411 | 20405 | |
c24bdb02 | 20406 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
20407 | } |
20408 | ||
4c2df51b DJ |
20409 | static void |
20410 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 20411 | struct dwarf2_cu *cu) |
4c2df51b | 20412 | { |
518817b3 | 20413 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
20414 | struct comp_unit_head *cu_header = &cu->header; |
20415 | ||
4c2df51b DJ |
20416 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
20417 | code here to turn a symbol with DW_AT_external and a | |
20418 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
20419 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
20420 | with some versions of binutils) where shared libraries could have | |
20421 | relocations against symbols in their debug information - the | |
20422 | minimal symbol would have the right address, but the debug info | |
20423 | would not. It's no longer necessary, because we will explicitly | |
20424 | apply relocations when we read in the debug information now. */ | |
20425 | ||
20426 | /* A DW_AT_location attribute with no contents indicates that a | |
20427 | variable has been optimized away. */ | |
4fc6c0d5 | 20428 | if (attr->form_is_block () && DW_BLOCK (attr)->size == 0) |
4c2df51b | 20429 | { |
f1e6e072 | 20430 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
20431 | return; |
20432 | } | |
20433 | ||
20434 | /* Handle one degenerate form of location expression specially, to | |
20435 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
20436 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
20437 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 20438 | |
4fc6c0d5 | 20439 | if (attr->form_is_block () |
3019eac3 DE |
20440 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
20441 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
20442 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
20443 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
20444 | && (DW_BLOCK (attr)->size |
20445 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 20446 | { |
891d2f0b | 20447 | unsigned int dummy; |
4c2df51b | 20448 | |
3019eac3 | 20449 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
c8a7a66f TT |
20450 | SET_SYMBOL_VALUE_ADDRESS |
20451 | (sym, cu->header.read_address (objfile->obfd, | |
20452 | DW_BLOCK (attr)->data + 1, | |
20453 | &dummy)); | |
3019eac3 | 20454 | else |
38583298 TT |
20455 | SET_SYMBOL_VALUE_ADDRESS |
20456 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
20457 | &dummy)); | |
f1e6e072 | 20458 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 20459 | fixup_symbol_section (sym, objfile); |
6a053cb1 TT |
20460 | SET_SYMBOL_VALUE_ADDRESS |
20461 | (sym, | |
20462 | SYMBOL_VALUE_ADDRESS (sym) | |
20463 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); | |
4c2df51b DJ |
20464 | return; |
20465 | } | |
20466 | ||
20467 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
20468 | expression evaluator, and use LOC_COMPUTED only when necessary | |
20469 | (i.e. when the value of a register or memory location is | |
20470 | referenced, or a thread-local block, etc.). Then again, it might | |
20471 | not be worthwhile. I'm assuming that it isn't unless performance | |
20472 | or memory numbers show me otherwise. */ | |
20473 | ||
f1e6e072 | 20474 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 20475 | |
f1e6e072 | 20476 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 20477 | cu->has_loclist = true; |
4c2df51b DJ |
20478 | } |
20479 | ||
c906108c SS |
20480 | /* Given a pointer to a DWARF information entry, figure out if we need |
20481 | to make a symbol table entry for it, and if so, create a new entry | |
20482 | and return a pointer to it. | |
20483 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
20484 | used the passed type. |
20485 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
20486 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
20487 | |
20488 | static struct symbol * | |
5e2db402 TT |
20489 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
20490 | struct symbol *space) | |
c906108c | 20491 | { |
518817b3 SM |
20492 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20493 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 20494 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 20495 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 20496 | struct symbol *sym = NULL; |
15d034d0 | 20497 | const char *name; |
c906108c SS |
20498 | struct attribute *attr = NULL; |
20499 | struct attribute *attr2 = NULL; | |
e142c38c | 20500 | CORE_ADDR baseaddr; |
e37fd15a SW |
20501 | struct pending **list_to_add = NULL; |
20502 | ||
edb3359d | 20503 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 20504 | |
b3b3bada | 20505 | baseaddr = objfile->text_section_offset (); |
c906108c | 20506 | |
94af9270 | 20507 | name = dwarf2_name (die, cu); |
c906108c SS |
20508 | if (name) |
20509 | { | |
94af9270 | 20510 | const char *linkagename; |
34eaf542 | 20511 | int suppress_add = 0; |
94af9270 | 20512 | |
34eaf542 TT |
20513 | if (space) |
20514 | sym = space; | |
20515 | else | |
e623cf5d | 20516 | sym = allocate_symbol (objfile); |
c906108c | 20517 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
20518 | |
20519 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 20520 | sym->set_language (cu->language, &objfile->objfile_obstack); |
94af9270 | 20521 | linkagename = dwarf2_physname (name, die, cu); |
4d4eaa30 | 20522 | sym->compute_and_set_names (linkagename, false, objfile->per_bfd); |
c906108c | 20523 | |
f55ee35c JK |
20524 | /* Fortran does not have mangling standard and the mangling does differ |
20525 | between gfortran, iFort etc. */ | |
20526 | if (cu->language == language_fortran | |
468c0cbb CB |
20527 | && symbol_get_demangled_name (sym) == NULL) |
20528 | symbol_set_demangled_name (sym, | |
cfc594ee | 20529 | dwarf2_full_name (name, die, cu), |
29df156d | 20530 | NULL); |
f55ee35c | 20531 | |
c906108c | 20532 | /* Default assumptions. |
c5aa993b | 20533 | Use the passed type or decode it from the die. */ |
176620f1 | 20534 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 20535 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
20536 | if (type != NULL) |
20537 | SYMBOL_TYPE (sym) = type; | |
20538 | else | |
e7c27a73 | 20539 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
20540 | attr = dwarf2_attr (die, |
20541 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
20542 | cu); | |
435d3d88 | 20543 | if (attr != nullptr) |
c906108c SS |
20544 | { |
20545 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
20546 | } | |
cb1df416 | 20547 | |
edb3359d DJ |
20548 | attr = dwarf2_attr (die, |
20549 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
20550 | cu); | |
435d3d88 | 20551 | if (attr != nullptr) |
cb1df416 | 20552 | { |
ecfb656c | 20553 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 20554 | struct file_entry *fe; |
9a619af0 | 20555 | |
ecfb656c PA |
20556 | if (cu->line_header != NULL) |
20557 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
20558 | else |
20559 | fe = NULL; | |
20560 | ||
20561 | if (fe == NULL) | |
b98664d3 | 20562 | complaint (_("file index out of range")); |
8c43009f PA |
20563 | else |
20564 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
20565 | } |
20566 | ||
c906108c SS |
20567 | switch (die->tag) |
20568 | { | |
20569 | case DW_TAG_label: | |
e142c38c | 20570 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 20571 | if (attr != nullptr) |
3e29f34a MR |
20572 | { |
20573 | CORE_ADDR addr; | |
20574 | ||
cd6c91b4 | 20575 | addr = attr->value_as_address (); |
3e29f34a | 20576 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 20577 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 20578 | } |
0f5238ed TT |
20579 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20580 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20581 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 20582 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20583 | break; |
20584 | case DW_TAG_subprogram: | |
20585 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20586 | finish_block. */ | |
f1e6e072 | 20587 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20588 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 20589 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
20590 | || cu->language == language_ada |
20591 | || cu->language == language_fortran) | |
c906108c | 20592 | { |
2cfa0c8d | 20593 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
20594 | Ada and Fortran subprograms, whether marked external or |
20595 | not, are always stored as a global symbol, because we want | |
20596 | to be able to access them globally. For instance, we want | |
20597 | to be able to break on a nested subprogram without having | |
20598 | to specify the context. */ | |
c24bdb02 | 20599 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
20600 | } |
20601 | else | |
20602 | { | |
e37fd15a | 20603 | list_to_add = cu->list_in_scope; |
c906108c SS |
20604 | } |
20605 | break; | |
edb3359d DJ |
20606 | case DW_TAG_inlined_subroutine: |
20607 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20608 | finish_block. */ | |
f1e6e072 | 20609 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20610 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20611 | list_to_add = cu->list_in_scope; |
edb3359d | 20612 | break; |
34eaf542 TT |
20613 | case DW_TAG_template_value_param: |
20614 | suppress_add = 1; | |
20615 | /* Fall through. */ | |
72929c62 | 20616 | case DW_TAG_constant: |
c906108c | 20617 | case DW_TAG_variable: |
254e6b9e | 20618 | case DW_TAG_member: |
0963b4bd MS |
20619 | /* Compilation with minimal debug info may result in |
20620 | variables with missing type entries. Change the | |
20621 | misleading `void' type to something sensible. */ | |
c906108c | 20622 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20623 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20624 | |
e142c38c | 20625 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20626 | /* In the case of DW_TAG_member, we should only be called for |
20627 | static const members. */ | |
20628 | if (die->tag == DW_TAG_member) | |
20629 | { | |
3863f96c DE |
20630 | /* dwarf2_add_field uses die_is_declaration, |
20631 | so we do the same. */ | |
254e6b9e DE |
20632 | gdb_assert (die_is_declaration (die, cu)); |
20633 | gdb_assert (attr); | |
20634 | } | |
435d3d88 | 20635 | if (attr != nullptr) |
c906108c | 20636 | { |
e7c27a73 | 20637 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20638 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20639 | if (!suppress_add) |
34eaf542 TT |
20640 | { |
20641 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 20642 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 20643 | else |
e37fd15a | 20644 | list_to_add = cu->list_in_scope; |
34eaf542 | 20645 | } |
c906108c SS |
20646 | break; |
20647 | } | |
e142c38c | 20648 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 20649 | if (attr != nullptr) |
c906108c | 20650 | { |
e7c27a73 | 20651 | var_decode_location (attr, sym, cu); |
e142c38c | 20652 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20653 | |
20654 | /* Fortran explicitly imports any global symbols to the local | |
20655 | scope by DW_TAG_common_block. */ | |
20656 | if (cu->language == language_fortran && die->parent | |
20657 | && die->parent->tag == DW_TAG_common_block) | |
20658 | attr2 = NULL; | |
20659 | ||
caac4577 JG |
20660 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20661 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20662 | && !dwarf2_per_objfile->has_section_at_zero) | |
20663 | { | |
20664 | /* When a static variable is eliminated by the linker, | |
20665 | the corresponding debug information is not stripped | |
20666 | out, but the variable address is set to null; | |
20667 | do not add such variables into symbol table. */ | |
20668 | } | |
20669 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20670 | { |
4b610737 TT |
20671 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20672 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
20673 | && dwarf2_per_objfile->can_copy) | |
20674 | { | |
20675 | /* A global static variable might be subject to | |
20676 | copy relocation. We first check for a local | |
20677 | minsym, though, because maybe the symbol was | |
20678 | marked hidden, in which case this would not | |
20679 | apply. */ | |
20680 | bound_minimal_symbol found | |
20681 | = (lookup_minimal_symbol_linkage | |
987012b8 | 20682 | (sym->linkage_name (), objfile)); |
4b610737 TT |
20683 | if (found.minsym != nullptr) |
20684 | sym->maybe_copied = 1; | |
20685 | } | |
f55ee35c | 20686 | |
1c809c68 TT |
20687 | /* A variable with DW_AT_external is never static, |
20688 | but it may be block-scoped. */ | |
804d2729 | 20689 | list_to_add |
c24bdb02 KS |
20690 | = ((cu->list_in_scope |
20691 | == cu->get_builder ()->get_file_symbols ()) | |
20692 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20693 | : cu->list_in_scope); |
1c809c68 | 20694 | } |
c906108c | 20695 | else |
e37fd15a | 20696 | list_to_add = cu->list_in_scope; |
c906108c SS |
20697 | } |
20698 | else | |
20699 | { | |
20700 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20701 | If it is an external symbol and we have type information |
20702 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20703 | The address of the variable will then be determined from | |
20704 | the minimal symbol table whenever the variable is | |
20705 | referenced. */ | |
e142c38c | 20706 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20707 | |
20708 | /* Fortran explicitly imports any global symbols to the local | |
20709 | scope by DW_TAG_common_block. */ | |
20710 | if (cu->language == language_fortran && die->parent | |
20711 | && die->parent->tag == DW_TAG_common_block) | |
20712 | { | |
20713 | /* SYMBOL_CLASS doesn't matter here because | |
20714 | read_common_block is going to reset it. */ | |
20715 | if (!suppress_add) | |
20716 | list_to_add = cu->list_in_scope; | |
20717 | } | |
20718 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20719 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20720 | { |
0fe7935b DJ |
20721 | /* A variable with DW_AT_external is never static, but it |
20722 | may be block-scoped. */ | |
804d2729 | 20723 | list_to_add |
c24bdb02 KS |
20724 | = ((cu->list_in_scope |
20725 | == cu->get_builder ()->get_file_symbols ()) | |
20726 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20727 | : cu->list_in_scope); |
0fe7935b | 20728 | |
f1e6e072 | 20729 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20730 | } |
442ddf59 JK |
20731 | else if (!die_is_declaration (die, cu)) |
20732 | { | |
20733 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20734 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20735 | if (!suppress_add) |
20736 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20737 | } |
c906108c SS |
20738 | } |
20739 | break; | |
20740 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
20741 | { |
20742 | /* If we are inside a function, mark this as an argument. If | |
20743 | not, we might be looking at an argument to an inlined function | |
20744 | when we do not have enough information to show inlined frames; | |
20745 | pretend it's a local variable in that case so that the user can | |
20746 | still see it. */ | |
804d2729 | 20747 | struct context_stack *curr |
c24bdb02 | 20748 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
20749 | if (curr != nullptr && curr->name != nullptr) |
20750 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
20751 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 20752 | if (attr != nullptr) |
a60f3166 TT |
20753 | { |
20754 | var_decode_location (attr, sym, cu); | |
20755 | } | |
20756 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 20757 | if (attr != nullptr) |
a60f3166 TT |
20758 | { |
20759 | dwarf2_const_value (attr, sym, cu); | |
20760 | } | |
f346a30d | 20761 | |
a60f3166 TT |
20762 | list_to_add = cu->list_in_scope; |
20763 | } | |
c906108c SS |
20764 | break; |
20765 | case DW_TAG_unspecified_parameters: | |
20766 | /* From varargs functions; gdb doesn't seem to have any | |
20767 | interest in this information, so just ignore it for now. | |
20768 | (FIXME?) */ | |
20769 | break; | |
34eaf542 TT |
20770 | case DW_TAG_template_type_param: |
20771 | suppress_add = 1; | |
20772 | /* Fall through. */ | |
c906108c | 20773 | case DW_TAG_class_type: |
680b30c7 | 20774 | case DW_TAG_interface_type: |
c906108c SS |
20775 | case DW_TAG_structure_type: |
20776 | case DW_TAG_union_type: | |
72019c9c | 20777 | case DW_TAG_set_type: |
c906108c | 20778 | case DW_TAG_enumeration_type: |
f1e6e072 | 20779 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20780 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20781 | |
63d06c5c | 20782 | { |
9c37b5ae | 20783 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20784 | really ever be static objects: otherwise, if you try |
20785 | to, say, break of a class's method and you're in a file | |
20786 | which doesn't mention that class, it won't work unless | |
20787 | the check for all static symbols in lookup_symbol_aux | |
20788 | saves you. See the OtherFileClass tests in | |
20789 | gdb.c++/namespace.exp. */ | |
20790 | ||
e37fd15a | 20791 | if (!suppress_add) |
34eaf542 | 20792 | { |
c24bdb02 | 20793 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 20794 | list_to_add |
c24bdb02 | 20795 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 20796 | && cu->language == language_cplus |
c24bdb02 | 20797 | ? builder->get_global_symbols () |
804d2729 | 20798 | : cu->list_in_scope); |
63d06c5c | 20799 | |
64382290 | 20800 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20801 | ... }" also defines a typedef for "foo". */ |
64382290 | 20802 | if (cu->language == language_cplus |
45280282 | 20803 | || cu->language == language_ada |
c44af4eb TT |
20804 | || cu->language == language_d |
20805 | || cu->language == language_rust) | |
64382290 TT |
20806 | { |
20807 | /* The symbol's name is already allocated along | |
20808 | with this objfile, so we don't need to | |
20809 | duplicate it for the type. */ | |
20810 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
987012b8 | 20811 | TYPE_NAME (SYMBOL_TYPE (sym)) = sym->search_name (); |
64382290 | 20812 | } |
63d06c5c DC |
20813 | } |
20814 | } | |
c906108c SS |
20815 | break; |
20816 | case DW_TAG_typedef: | |
f1e6e072 | 20817 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20818 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20819 | list_to_add = cu->list_in_scope; |
63d06c5c | 20820 | break; |
c906108c | 20821 | case DW_TAG_base_type: |
a02abb62 | 20822 | case DW_TAG_subrange_type: |
f1e6e072 | 20823 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20824 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20825 | list_to_add = cu->list_in_scope; |
c906108c SS |
20826 | break; |
20827 | case DW_TAG_enumerator: | |
e142c38c | 20828 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 20829 | if (attr != nullptr) |
c906108c | 20830 | { |
e7c27a73 | 20831 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20832 | } |
63d06c5c DC |
20833 | { |
20834 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20835 | DW_TAG_class_type, etc. block. */ | |
20836 | ||
804d2729 | 20837 | list_to_add |
c24bdb02 | 20838 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 20839 | && cu->language == language_cplus |
c24bdb02 | 20840 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 20841 | : cu->list_in_scope); |
63d06c5c | 20842 | } |
c906108c | 20843 | break; |
74921315 | 20844 | case DW_TAG_imported_declaration: |
5c4e30ca | 20845 | case DW_TAG_namespace: |
f1e6e072 | 20846 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 20847 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 20848 | break; |
530e8392 KB |
20849 | case DW_TAG_module: |
20850 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20851 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 20852 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 20853 | break; |
4357ac6c | 20854 | case DW_TAG_common_block: |
f1e6e072 | 20855 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 20856 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 20857 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 20858 | break; |
c906108c SS |
20859 | default: |
20860 | /* Not a tag we recognize. Hopefully we aren't processing | |
20861 | trash data, but since we must specifically ignore things | |
20862 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20863 | this point. */ |
b98664d3 | 20864 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 20865 | dwarf_tag_name (die->tag)); |
c906108c SS |
20866 | break; |
20867 | } | |
df8a16a1 | 20868 | |
e37fd15a SW |
20869 | if (suppress_add) |
20870 | { | |
20871 | sym->hash_next = objfile->template_symbols; | |
20872 | objfile->template_symbols = sym; | |
20873 | list_to_add = NULL; | |
20874 | } | |
20875 | ||
20876 | if (list_to_add != NULL) | |
d3cb6808 | 20877 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 20878 | |
df8a16a1 DJ |
20879 | /* For the benefit of old versions of GCC, check for anonymous |
20880 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20881 | if (!cu->processing_has_namespace_info |
94af9270 | 20882 | && cu->language == language_cplus) |
c24bdb02 | 20883 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
20884 | } |
20885 | return (sym); | |
20886 | } | |
20887 | ||
98bfdba5 PA |
20888 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20889 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20890 | standard (v4) is not entirely clear about the meaning of using | |
20891 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20892 | wider than the data. The conclusion of a discussion on the DWARF | |
20893 | list was that this is unspecified. We choose to always zero-extend | |
20894 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20895 | |
98bfdba5 | 20896 | static gdb_byte * |
ff39bb5e | 20897 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20898 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20899 | { |
518817b3 | 20900 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
20901 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20902 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20903 | LONGEST l = DW_UNSND (attr); |
20904 | ||
20905 | if (bits < sizeof (*value) * 8) | |
20906 | { | |
20907 | l &= ((LONGEST) 1 << bits) - 1; | |
20908 | *value = l; | |
20909 | } | |
20910 | else if (bits == sizeof (*value) * 8) | |
20911 | *value = l; | |
20912 | else | |
20913 | { | |
224c3ddb | 20914 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20915 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20916 | return bytes; | |
20917 | } | |
20918 | ||
20919 | return NULL; | |
20920 | } | |
20921 | ||
20922 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20923 | the value does not fit in *VALUE, set *BYTES - either already | |
20924 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20925 | or, set *BATON, if we translated the constant to a location | |
20926 | expression. */ | |
20927 | ||
20928 | static void | |
ff39bb5e | 20929 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20930 | const char *name, struct obstack *obstack, |
20931 | struct dwarf2_cu *cu, | |
d521ce57 | 20932 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20933 | struct dwarf2_locexpr_baton **baton) |
20934 | { | |
518817b3 | 20935 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 20936 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 20937 | struct dwarf_block *blk; |
98bfdba5 PA |
20938 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20939 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20940 | ||
20941 | *value = 0; | |
20942 | *bytes = NULL; | |
20943 | *baton = NULL; | |
c906108c SS |
20944 | |
20945 | switch (attr->form) | |
20946 | { | |
20947 | case DW_FORM_addr: | |
336d760d | 20948 | case DW_FORM_addrx: |
3019eac3 | 20949 | case DW_FORM_GNU_addr_index: |
ac56253d | 20950 | { |
ac56253d TT |
20951 | gdb_byte *data; |
20952 | ||
98bfdba5 PA |
20953 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20954 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20955 | cu_header->addr_size, |
98bfdba5 | 20956 | TYPE_LENGTH (type)); |
ac56253d TT |
20957 | /* Symbols of this form are reasonably rare, so we just |
20958 | piggyback on the existing location code rather than writing | |
20959 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20960 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20961 | (*baton)->per_cu = cu->per_cu; |
20962 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20963 | |
98bfdba5 | 20964 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20965 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20966 | (*baton)->data = data; |
ac56253d TT |
20967 | |
20968 | data[0] = DW_OP_addr; | |
20969 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20970 | byte_order, DW_ADDR (attr)); | |
20971 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20972 | } |
c906108c | 20973 | break; |
4ac36638 | 20974 | case DW_FORM_string: |
93b5768b | 20975 | case DW_FORM_strp: |
cf532bd1 | 20976 | case DW_FORM_strx: |
3019eac3 | 20977 | case DW_FORM_GNU_str_index: |
36586728 | 20978 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20979 | /* DW_STRING is already allocated on the objfile obstack, point |
20980 | directly to it. */ | |
d521ce57 | 20981 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20982 | break; |
c906108c SS |
20983 | case DW_FORM_block1: |
20984 | case DW_FORM_block2: | |
20985 | case DW_FORM_block4: | |
20986 | case DW_FORM_block: | |
2dc7f7b3 | 20987 | case DW_FORM_exprloc: |
0224619f | 20988 | case DW_FORM_data16: |
c906108c | 20989 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20990 | if (TYPE_LENGTH (type) != blk->size) |
20991 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20992 | TYPE_LENGTH (type)); | |
20993 | *bytes = blk->data; | |
c906108c | 20994 | break; |
2df3850c JM |
20995 | |
20996 | /* The DW_AT_const_value attributes are supposed to carry the | |
20997 | symbol's value "represented as it would be on the target | |
20998 | architecture." By the time we get here, it's already been | |
20999 | converted to host endianness, so we just need to sign- or | |
21000 | zero-extend it as appropriate. */ | |
21001 | case DW_FORM_data1: | |
3aef2284 | 21002 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21003 | break; |
c906108c | 21004 | case DW_FORM_data2: |
3aef2284 | 21005 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21006 | break; |
c906108c | 21007 | case DW_FORM_data4: |
3aef2284 | 21008 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21009 | break; |
c906108c | 21010 | case DW_FORM_data8: |
3aef2284 | 21011 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
21012 | break; |
21013 | ||
c906108c | 21014 | case DW_FORM_sdata: |
663c44ac | 21015 | case DW_FORM_implicit_const: |
98bfdba5 | 21016 | *value = DW_SND (attr); |
2df3850c JM |
21017 | break; |
21018 | ||
c906108c | 21019 | case DW_FORM_udata: |
98bfdba5 | 21020 | *value = DW_UNSND (attr); |
c906108c | 21021 | break; |
2df3850c | 21022 | |
c906108c | 21023 | default: |
b98664d3 | 21024 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 21025 | dwarf_form_name (attr->form)); |
98bfdba5 | 21026 | *value = 0; |
c906108c SS |
21027 | break; |
21028 | } | |
21029 | } | |
21030 | ||
2df3850c | 21031 | |
98bfdba5 PA |
21032 | /* Copy constant value from an attribute to a symbol. */ |
21033 | ||
2df3850c | 21034 | static void |
ff39bb5e | 21035 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 21036 | struct dwarf2_cu *cu) |
2df3850c | 21037 | { |
518817b3 | 21038 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 21039 | LONGEST value; |
d521ce57 | 21040 | const gdb_byte *bytes; |
98bfdba5 | 21041 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 21042 | |
98bfdba5 | 21043 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 21044 | sym->print_name (), |
98bfdba5 PA |
21045 | &objfile->objfile_obstack, cu, |
21046 | &value, &bytes, &baton); | |
2df3850c | 21047 | |
98bfdba5 PA |
21048 | if (baton != NULL) |
21049 | { | |
98bfdba5 | 21050 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21051 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21052 | } |
21053 | else if (bytes != NULL) | |
21054 | { | |
21055 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21056 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21057 | } |
21058 | else | |
21059 | { | |
21060 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21061 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21062 | } |
2df3850c JM |
21063 | } |
21064 | ||
c906108c SS |
21065 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21066 | ||
21067 | static struct type * | |
e7c27a73 | 21068 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21069 | { |
c906108c | 21070 | struct attribute *type_attr; |
c906108c | 21071 | |
e142c38c | 21072 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21073 | if (!type_attr) |
21074 | { | |
518817b3 | 21075 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21076 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 21077 | return objfile_type (objfile)->builtin_void; |
c906108c | 21078 | } |
348e048f | 21079 | |
673bfd45 | 21080 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21081 | } |
21082 | ||
b4ba55a1 JB |
21083 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21084 | that allows to find parallel types through that information instead | |
21085 | of having to do expensive parallel lookups by type name. */ | |
21086 | ||
21087 | static int | |
21088 | need_gnat_info (struct dwarf2_cu *cu) | |
21089 | { | |
de4cb04a JB |
21090 | /* Assume that the Ada compiler was GNAT, which always produces |
21091 | the auxiliary information. */ | |
21092 | return (cu->language == language_ada); | |
b4ba55a1 JB |
21093 | } |
21094 | ||
b4ba55a1 JB |
21095 | /* Return the auxiliary type of the die in question using its |
21096 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21097 | attribute is not present. */ | |
21098 | ||
21099 | static struct type * | |
21100 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21101 | { | |
b4ba55a1 | 21102 | struct attribute *type_attr; |
b4ba55a1 JB |
21103 | |
21104 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21105 | if (!type_attr) | |
21106 | return NULL; | |
21107 | ||
673bfd45 | 21108 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21109 | } |
21110 | ||
21111 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21112 | descriptive type accordingly. */ | |
21113 | ||
21114 | static void | |
21115 | set_descriptive_type (struct type *type, struct die_info *die, | |
21116 | struct dwarf2_cu *cu) | |
21117 | { | |
21118 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21119 | ||
21120 | if (descriptive_type) | |
21121 | { | |
21122 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21123 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21124 | } | |
21125 | } | |
21126 | ||
c906108c SS |
21127 | /* Return the containing type of the die in question using its |
21128 | DW_AT_containing_type attribute. */ | |
21129 | ||
21130 | static struct type * | |
e7c27a73 | 21131 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21132 | { |
c906108c | 21133 | struct attribute *type_attr; |
518817b3 | 21134 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21135 | |
e142c38c | 21136 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21137 | if (!type_attr) |
21138 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 21139 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 21140 | |
673bfd45 | 21141 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21142 | } |
21143 | ||
ac9ec31b DE |
21144 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21145 | ||
21146 | static struct type * | |
21147 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21148 | { | |
518817b3 SM |
21149 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21150 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 21151 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 21152 | char *saved; |
ac9ec31b | 21153 | |
528e1572 SM |
21154 | std::string message |
21155 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
21156 | objfile_name (objfile), | |
21157 | sect_offset_str (cu->header.sect_off), | |
21158 | sect_offset_str (die->sect_off)); | |
efba19b0 | 21159 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 21160 | |
19f392bc | 21161 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21162 | } |
21163 | ||
673bfd45 | 21164 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21165 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21166 | DW_AT_containing_type. | |
673bfd45 DE |
21167 | If there is no type substitute an error marker. */ |
21168 | ||
c906108c | 21169 | static struct type * |
ff39bb5e | 21170 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21171 | struct dwarf2_cu *cu) |
c906108c | 21172 | { |
518817b3 SM |
21173 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21174 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21175 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
21176 | struct type *this_type; |
21177 | ||
ac9ec31b DE |
21178 | gdb_assert (attr->name == DW_AT_type |
21179 | || attr->name == DW_AT_GNAT_descriptive_type | |
21180 | || attr->name == DW_AT_containing_type); | |
21181 | ||
673bfd45 DE |
21182 | /* First see if we have it cached. */ |
21183 | ||
36586728 TT |
21184 | if (attr->form == DW_FORM_GNU_ref_alt) |
21185 | { | |
21186 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 21187 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 21188 | |
ed2dc618 SM |
21189 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
21190 | dwarf2_per_objfile); | |
9c541725 | 21191 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 21192 | } |
cd6c91b4 | 21193 | else if (attr->form_is_ref ()) |
673bfd45 | 21194 | { |
9c541725 | 21195 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 21196 | |
9c541725 | 21197 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21198 | } |
55f1336d | 21199 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21200 | { |
ac9ec31b | 21201 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21202 | |
ac9ec31b | 21203 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21204 | } |
21205 | else | |
21206 | { | |
b98664d3 | 21207 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
21208 | " at %s [in module %s]"), |
21209 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 21210 | objfile_name (objfile)); |
ac9ec31b | 21211 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21212 | } |
21213 | ||
21214 | /* If not cached we need to read it in. */ | |
21215 | ||
21216 | if (this_type == NULL) | |
21217 | { | |
ac9ec31b | 21218 | struct die_info *type_die = NULL; |
673bfd45 DE |
21219 | struct dwarf2_cu *type_cu = cu; |
21220 | ||
cd6c91b4 | 21221 | if (attr->form_is_ref ()) |
ac9ec31b DE |
21222 | type_die = follow_die_ref (die, attr, &type_cu); |
21223 | if (type_die == NULL) | |
21224 | return build_error_marker_type (cu, die); | |
21225 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21226 | from an inter-CU reference and the type's CU got expanded before |
21227 | ours. */ | |
ac9ec31b | 21228 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21229 | } |
21230 | ||
21231 | /* If we still don't have a type use an error marker. */ | |
21232 | ||
21233 | if (this_type == NULL) | |
ac9ec31b | 21234 | return build_error_marker_type (cu, die); |
673bfd45 | 21235 | |
f792889a | 21236 | return this_type; |
c906108c SS |
21237 | } |
21238 | ||
673bfd45 DE |
21239 | /* Return the type in DIE, CU. |
21240 | Returns NULL for invalid types. | |
21241 | ||
02142a6c | 21242 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21243 | and only reads the die in if necessary. |
21244 | ||
21245 | NOTE: This can be called when reading in partial or full symbols. */ | |
21246 | ||
f792889a | 21247 | static struct type * |
e7c27a73 | 21248 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21249 | { |
f792889a DJ |
21250 | struct type *this_type; |
21251 | ||
21252 | this_type = get_die_type (die, cu); | |
21253 | if (this_type) | |
21254 | return this_type; | |
21255 | ||
673bfd45 DE |
21256 | return read_type_die_1 (die, cu); |
21257 | } | |
21258 | ||
21259 | /* Read the type in DIE, CU. | |
21260 | Returns NULL for invalid types. */ | |
21261 | ||
21262 | static struct type * | |
21263 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21264 | { | |
21265 | struct type *this_type = NULL; | |
21266 | ||
c906108c SS |
21267 | switch (die->tag) |
21268 | { | |
21269 | case DW_TAG_class_type: | |
680b30c7 | 21270 | case DW_TAG_interface_type: |
c906108c SS |
21271 | case DW_TAG_structure_type: |
21272 | case DW_TAG_union_type: | |
f792889a | 21273 | this_type = read_structure_type (die, cu); |
c906108c SS |
21274 | break; |
21275 | case DW_TAG_enumeration_type: | |
f792889a | 21276 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21277 | break; |
21278 | case DW_TAG_subprogram: | |
21279 | case DW_TAG_subroutine_type: | |
edb3359d | 21280 | case DW_TAG_inlined_subroutine: |
f792889a | 21281 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21282 | break; |
21283 | case DW_TAG_array_type: | |
f792889a | 21284 | this_type = read_array_type (die, cu); |
c906108c | 21285 | break; |
72019c9c | 21286 | case DW_TAG_set_type: |
f792889a | 21287 | this_type = read_set_type (die, cu); |
72019c9c | 21288 | break; |
c906108c | 21289 | case DW_TAG_pointer_type: |
f792889a | 21290 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21291 | break; |
21292 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21293 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21294 | break; |
21295 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21296 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21297 | break; | |
21298 | case DW_TAG_rvalue_reference_type: | |
21299 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21300 | break; |
21301 | case DW_TAG_const_type: | |
f792889a | 21302 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21303 | break; |
21304 | case DW_TAG_volatile_type: | |
f792889a | 21305 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21306 | break; |
06d66ee9 TT |
21307 | case DW_TAG_restrict_type: |
21308 | this_type = read_tag_restrict_type (die, cu); | |
21309 | break; | |
c906108c | 21310 | case DW_TAG_string_type: |
f792889a | 21311 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21312 | break; |
21313 | case DW_TAG_typedef: | |
f792889a | 21314 | this_type = read_typedef (die, cu); |
c906108c | 21315 | break; |
a02abb62 | 21316 | case DW_TAG_subrange_type: |
f792889a | 21317 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21318 | break; |
c906108c | 21319 | case DW_TAG_base_type: |
f792889a | 21320 | this_type = read_base_type (die, cu); |
c906108c | 21321 | break; |
81a17f79 | 21322 | case DW_TAG_unspecified_type: |
f792889a | 21323 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21324 | break; |
0114d602 DJ |
21325 | case DW_TAG_namespace: |
21326 | this_type = read_namespace_type (die, cu); | |
21327 | break; | |
f55ee35c JK |
21328 | case DW_TAG_module: |
21329 | this_type = read_module_type (die, cu); | |
21330 | break; | |
a2c2acaf MW |
21331 | case DW_TAG_atomic_type: |
21332 | this_type = read_tag_atomic_type (die, cu); | |
21333 | break; | |
c906108c | 21334 | default: |
b98664d3 | 21335 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 21336 | dwarf_tag_name (die->tag)); |
c906108c SS |
21337 | break; |
21338 | } | |
63d06c5c | 21339 | |
f792889a | 21340 | return this_type; |
63d06c5c DC |
21341 | } |
21342 | ||
abc72ce4 DE |
21343 | /* See if we can figure out if the class lives in a namespace. We do |
21344 | this by looking for a member function; its demangled name will | |
21345 | contain namespace info, if there is any. | |
21346 | Return the computed name or NULL. | |
21347 | Space for the result is allocated on the objfile's obstack. | |
21348 | This is the full-die version of guess_partial_die_structure_name. | |
21349 | In this case we know DIE has no useful parent. */ | |
21350 | ||
43816ebc | 21351 | static const char * |
abc72ce4 DE |
21352 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
21353 | { | |
21354 | struct die_info *spec_die; | |
21355 | struct dwarf2_cu *spec_cu; | |
21356 | struct die_info *child; | |
518817b3 | 21357 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
21358 | |
21359 | spec_cu = cu; | |
21360 | spec_die = die_specification (die, &spec_cu); | |
21361 | if (spec_die != NULL) | |
21362 | { | |
21363 | die = spec_die; | |
21364 | cu = spec_cu; | |
21365 | } | |
21366 | ||
21367 | for (child = die->child; | |
21368 | child != NULL; | |
21369 | child = child->sibling) | |
21370 | { | |
21371 | if (child->tag == DW_TAG_subprogram) | |
21372 | { | |
73b9be8b | 21373 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 21374 | |
7d45c7c3 | 21375 | if (linkage_name != NULL) |
abc72ce4 | 21376 | { |
43816ebc TT |
21377 | gdb::unique_xmalloc_ptr<char> actual_name |
21378 | (language_class_name_from_physname (cu->language_defn, | |
21379 | linkage_name)); | |
21380 | const char *name = NULL; | |
abc72ce4 DE |
21381 | |
21382 | if (actual_name != NULL) | |
21383 | { | |
15d034d0 | 21384 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
21385 | |
21386 | if (die_name != NULL | |
43816ebc | 21387 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
21388 | { |
21389 | /* Strip off the class name from the full name. | |
21390 | We want the prefix. */ | |
21391 | int die_name_len = strlen (die_name); | |
43816ebc TT |
21392 | int actual_name_len = strlen (actual_name.get ()); |
21393 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
21394 | |
21395 | /* Test for '::' as a sanity check. */ | |
21396 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 21397 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 21398 | name = obstack_strndup ( |
e3b94546 | 21399 | &objfile->per_bfd->storage_obstack, |
43816ebc | 21400 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
21401 | } |
21402 | } | |
abc72ce4 DE |
21403 | return name; |
21404 | } | |
21405 | } | |
21406 | } | |
21407 | ||
21408 | return NULL; | |
21409 | } | |
21410 | ||
96408a79 SA |
21411 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
21412 | prefix part in such case. See | |
21413 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21414 | ||
a121b7c1 | 21415 | static const char * |
96408a79 SA |
21416 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
21417 | { | |
21418 | struct attribute *attr; | |
e6a959d6 | 21419 | const char *base; |
96408a79 SA |
21420 | |
21421 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
21422 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
21423 | return NULL; | |
21424 | ||
7d45c7c3 | 21425 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
21426 | return NULL; |
21427 | ||
73b9be8b | 21428 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
21429 | if (attr == NULL || DW_STRING (attr) == NULL) |
21430 | return NULL; | |
21431 | ||
21432 | /* dwarf2_name had to be already called. */ | |
21433 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
21434 | ||
21435 | /* Strip the base name, keep any leading namespaces/classes. */ | |
21436 | base = strrchr (DW_STRING (attr), ':'); | |
21437 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
21438 | return ""; | |
21439 | ||
518817b3 | 21440 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
21441 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
21442 | DW_STRING (attr), | |
21443 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
21444 | } |
21445 | ||
fdde2d81 | 21446 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 21447 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 21448 | |
0114d602 DJ |
21449 | For example, if we're within the method foo() in the following |
21450 | code: | |
21451 | ||
21452 | namespace N { | |
21453 | class C { | |
21454 | void foo () { | |
21455 | } | |
21456 | }; | |
21457 | } | |
21458 | ||
21459 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 21460 | |
0d5cff50 | 21461 | static const char * |
e142c38c | 21462 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 21463 | { |
518817b3 SM |
21464 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21465 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
21466 | struct die_info *parent, *spec_die; |
21467 | struct dwarf2_cu *spec_cu; | |
21468 | struct type *parent_type; | |
a121b7c1 | 21469 | const char *retval; |
63d06c5c | 21470 | |
9c37b5ae | 21471 | if (cu->language != language_cplus |
c44af4eb TT |
21472 | && cu->language != language_fortran && cu->language != language_d |
21473 | && cu->language != language_rust) | |
0114d602 DJ |
21474 | return ""; |
21475 | ||
96408a79 SA |
21476 | retval = anonymous_struct_prefix (die, cu); |
21477 | if (retval) | |
21478 | return retval; | |
21479 | ||
0114d602 DJ |
21480 | /* We have to be careful in the presence of DW_AT_specification. |
21481 | For example, with GCC 3.4, given the code | |
21482 | ||
21483 | namespace N { | |
21484 | void foo() { | |
21485 | // Definition of N::foo. | |
21486 | } | |
21487 | } | |
21488 | ||
21489 | then we'll have a tree of DIEs like this: | |
21490 | ||
21491 | 1: DW_TAG_compile_unit | |
21492 | 2: DW_TAG_namespace // N | |
21493 | 3: DW_TAG_subprogram // declaration of N::foo | |
21494 | 4: DW_TAG_subprogram // definition of N::foo | |
21495 | DW_AT_specification // refers to die #3 | |
21496 | ||
21497 | Thus, when processing die #4, we have to pretend that we're in | |
21498 | the context of its DW_AT_specification, namely the contex of die | |
21499 | #3. */ | |
21500 | spec_cu = cu; | |
21501 | spec_die = die_specification (die, &spec_cu); | |
21502 | if (spec_die == NULL) | |
21503 | parent = die->parent; | |
21504 | else | |
63d06c5c | 21505 | { |
0114d602 DJ |
21506 | parent = spec_die->parent; |
21507 | cu = spec_cu; | |
63d06c5c | 21508 | } |
0114d602 DJ |
21509 | |
21510 | if (parent == NULL) | |
21511 | return ""; | |
98bfdba5 PA |
21512 | else if (parent->building_fullname) |
21513 | { | |
21514 | const char *name; | |
21515 | const char *parent_name; | |
21516 | ||
21517 | /* It has been seen on RealView 2.2 built binaries, | |
21518 | DW_TAG_template_type_param types actually _defined_ as | |
21519 | children of the parent class: | |
21520 | ||
21521 | enum E {}; | |
21522 | template class <class Enum> Class{}; | |
21523 | Class<enum E> class_e; | |
21524 | ||
21525 | 1: DW_TAG_class_type (Class) | |
21526 | 2: DW_TAG_enumeration_type (E) | |
21527 | 3: DW_TAG_enumerator (enum1:0) | |
21528 | 3: DW_TAG_enumerator (enum2:1) | |
21529 | ... | |
21530 | 2: DW_TAG_template_type_param | |
21531 | DW_AT_type DW_FORM_ref_udata (E) | |
21532 | ||
21533 | Besides being broken debug info, it can put GDB into an | |
21534 | infinite loop. Consider: | |
21535 | ||
21536 | When we're building the full name for Class<E>, we'll start | |
21537 | at Class, and go look over its template type parameters, | |
21538 | finding E. We'll then try to build the full name of E, and | |
21539 | reach here. We're now trying to build the full name of E, | |
21540 | and look over the parent DIE for containing scope. In the | |
21541 | broken case, if we followed the parent DIE of E, we'd again | |
21542 | find Class, and once again go look at its template type | |
21543 | arguments, etc., etc. Simply don't consider such parent die | |
21544 | as source-level parent of this die (it can't be, the language | |
21545 | doesn't allow it), and break the loop here. */ | |
21546 | name = dwarf2_name (die, cu); | |
21547 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 21548 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
21549 | name ? name : "<unknown>", |
21550 | parent_name ? parent_name : "<unknown>"); | |
21551 | return ""; | |
21552 | } | |
63d06c5c | 21553 | else |
0114d602 DJ |
21554 | switch (parent->tag) |
21555 | { | |
63d06c5c | 21556 | case DW_TAG_namespace: |
0114d602 | 21557 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
21558 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
21559 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
21560 | Work around this problem here. */ | |
21561 | if (cu->language == language_cplus | |
e86ca25f | 21562 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 21563 | return ""; |
0114d602 | 21564 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 21565 | return TYPE_NAME (parent_type); |
63d06c5c | 21566 | case DW_TAG_class_type: |
680b30c7 | 21567 | case DW_TAG_interface_type: |
63d06c5c | 21568 | case DW_TAG_structure_type: |
0114d602 | 21569 | case DW_TAG_union_type: |
f55ee35c | 21570 | case DW_TAG_module: |
0114d602 | 21571 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
21572 | if (TYPE_NAME (parent_type) != NULL) |
21573 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
21574 | else |
21575 | /* An anonymous structure is only allowed non-static data | |
21576 | members; no typedefs, no member functions, et cetera. | |
21577 | So it does not need a prefix. */ | |
21578 | return ""; | |
abc72ce4 | 21579 | case DW_TAG_compile_unit: |
95554aad | 21580 | case DW_TAG_partial_unit: |
abc72ce4 DE |
21581 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
21582 | if (cu->language == language_cplus | |
fd5866f6 | 21583 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
21584 | && die->child != NULL |
21585 | && (die->tag == DW_TAG_class_type | |
21586 | || die->tag == DW_TAG_structure_type | |
21587 | || die->tag == DW_TAG_union_type)) | |
21588 | { | |
43816ebc | 21589 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
21590 | if (name != NULL) |
21591 | return name; | |
21592 | } | |
21593 | return ""; | |
0a4b0913 AB |
21594 | case DW_TAG_subprogram: |
21595 | /* Nested subroutines in Fortran get a prefix with the name | |
21596 | of the parent's subroutine. */ | |
21597 | if (cu->language == language_fortran) | |
21598 | { | |
21599 | if ((die->tag == DW_TAG_subprogram) | |
21600 | && (dwarf2_name (parent, cu) != NULL)) | |
21601 | return dwarf2_name (parent, cu); | |
21602 | } | |
21603 | return determine_prefix (parent, cu); | |
3d567982 TT |
21604 | case DW_TAG_enumeration_type: |
21605 | parent_type = read_type_die (parent, cu); | |
21606 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21607 | { | |
e86ca25f TT |
21608 | if (TYPE_NAME (parent_type) != NULL) |
21609 | return TYPE_NAME (parent_type); | |
3d567982 TT |
21610 | return ""; |
21611 | } | |
21612 | /* Fall through. */ | |
63d06c5c | 21613 | default: |
8176b9b8 | 21614 | return determine_prefix (parent, cu); |
63d06c5c | 21615 | } |
63d06c5c DC |
21616 | } |
21617 | ||
3e43a32a MS |
21618 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21619 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21620 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21621 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21622 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21623 | |
f55ee35c | 21624 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21625 | |
21626 | static char * | |
f55ee35c JK |
21627 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21628 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21629 | { |
f55ee35c | 21630 | const char *lead = ""; |
5c315b68 | 21631 | const char *sep; |
63d06c5c | 21632 | |
3e43a32a MS |
21633 | if (suffix == NULL || suffix[0] == '\0' |
21634 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21635 | sep = ""; |
45280282 IB |
21636 | else if (cu->language == language_d) |
21637 | { | |
21638 | /* For D, the 'main' function could be defined in any module, but it | |
21639 | should never be prefixed. */ | |
21640 | if (strcmp (suffix, "D main") == 0) | |
21641 | { | |
21642 | prefix = ""; | |
21643 | sep = ""; | |
21644 | } | |
21645 | else | |
21646 | sep = "."; | |
21647 | } | |
f55ee35c JK |
21648 | else if (cu->language == language_fortran && physname) |
21649 | { | |
21650 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21651 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21652 | ||
21653 | lead = "__"; | |
21654 | sep = "_MOD_"; | |
21655 | } | |
987504bb JJ |
21656 | else |
21657 | sep = "::"; | |
63d06c5c | 21658 | |
6dd47d34 DE |
21659 | if (prefix == NULL) |
21660 | prefix = ""; | |
21661 | if (suffix == NULL) | |
21662 | suffix = ""; | |
21663 | ||
987504bb JJ |
21664 | if (obs == NULL) |
21665 | { | |
3e43a32a | 21666 | char *retval |
224c3ddb SM |
21667 | = ((char *) |
21668 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21669 | |
f55ee35c JK |
21670 | strcpy (retval, lead); |
21671 | strcat (retval, prefix); | |
6dd47d34 DE |
21672 | strcat (retval, sep); |
21673 | strcat (retval, suffix); | |
63d06c5c DC |
21674 | return retval; |
21675 | } | |
987504bb JJ |
21676 | else |
21677 | { | |
21678 | /* We have an obstack. */ | |
f55ee35c | 21679 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21680 | } |
63d06c5c DC |
21681 | } |
21682 | ||
c906108c SS |
21683 | /* Return sibling of die, NULL if no sibling. */ |
21684 | ||
f9aca02d | 21685 | static struct die_info * |
fba45db2 | 21686 | sibling_die (struct die_info *die) |
c906108c | 21687 | { |
639d11d3 | 21688 | return die->sibling; |
c906108c SS |
21689 | } |
21690 | ||
71c25dea TT |
21691 | /* Get name of a die, return NULL if not found. */ |
21692 | ||
15d034d0 TT |
21693 | static const char * |
21694 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
21695 | struct obstack *obstack) |
21696 | { | |
21697 | if (name && cu->language == language_cplus) | |
21698 | { | |
2f408ecb | 21699 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21700 | |
2f408ecb | 21701 | if (!canon_name.empty ()) |
71c25dea | 21702 | { |
2f408ecb | 21703 | if (canon_name != name) |
efba19b0 | 21704 | name = obstack_strdup (obstack, canon_name); |
71c25dea TT |
21705 | } |
21706 | } | |
21707 | ||
21708 | return name; | |
c906108c SS |
21709 | } |
21710 | ||
96553a0c DE |
21711 | /* Get name of a die, return NULL if not found. |
21712 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21713 | |
15d034d0 | 21714 | static const char * |
e142c38c | 21715 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21716 | { |
21717 | struct attribute *attr; | |
518817b3 | 21718 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 21719 | |
e142c38c | 21720 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21721 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21722 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21723 | && die->tag != DW_TAG_class_type |
21724 | && die->tag != DW_TAG_interface_type | |
21725 | && die->tag != DW_TAG_structure_type | |
21726 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21727 | return NULL; |
21728 | ||
21729 | switch (die->tag) | |
21730 | { | |
21731 | case DW_TAG_compile_unit: | |
95554aad | 21732 | case DW_TAG_partial_unit: |
71c25dea TT |
21733 | /* Compilation units have a DW_AT_name that is a filename, not |
21734 | a source language identifier. */ | |
21735 | case DW_TAG_enumeration_type: | |
21736 | case DW_TAG_enumerator: | |
21737 | /* These tags always have simple identifiers already; no need | |
21738 | to canonicalize them. */ | |
21739 | return DW_STRING (attr); | |
907af001 | 21740 | |
96553a0c DE |
21741 | case DW_TAG_namespace: |
21742 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21743 | return DW_STRING (attr); | |
21744 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21745 | ||
907af001 UW |
21746 | case DW_TAG_class_type: |
21747 | case DW_TAG_interface_type: | |
21748 | case DW_TAG_structure_type: | |
21749 | case DW_TAG_union_type: | |
21750 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21751 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21752 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21753 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21754 | if (attr && DW_STRING (attr) |
61012eef GB |
21755 | && (startswith (DW_STRING (attr), "._") |
21756 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21757 | return NULL; |
53832f31 TT |
21758 | |
21759 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21760 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21761 | if (!attr || DW_STRING (attr) == NULL) | |
21762 | { | |
73b9be8b | 21763 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21764 | if (attr == NULL || DW_STRING (attr) == NULL) |
21765 | return NULL; | |
21766 | ||
df5c6c50 JK |
21767 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21768 | call for the same DIE. */ | |
21769 | if (!DW_STRING_IS_CANONICAL (attr)) | |
53832f31 | 21770 | { |
43816ebc TT |
21771 | gdb::unique_xmalloc_ptr<char> demangled |
21772 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); | |
4f180d53 AT |
21773 | if (demangled == nullptr) |
21774 | return nullptr; | |
43816ebc | 21775 | |
e6a959d6 | 21776 | const char *base; |
96408a79 | 21777 | |
53832f31 | 21778 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 21779 | DW_STRING (attr) |
021887d8 | 21780 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
43816ebc | 21781 | demangled.get ()); |
53832f31 | 21782 | DW_STRING_IS_CANONICAL (attr) = 1; |
96408a79 SA |
21783 | |
21784 | /* Strip any leading namespaces/classes, keep only the base name. | |
21785 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21786 | base = strrchr (DW_STRING (attr), ':'); | |
21787 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21788 | return &base[1]; | |
21789 | else | |
21790 | return DW_STRING (attr); | |
53832f31 TT |
21791 | } |
21792 | } | |
907af001 UW |
21793 | break; |
21794 | ||
71c25dea | 21795 | default: |
907af001 UW |
21796 | break; |
21797 | } | |
21798 | ||
21799 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21800 | { | |
21801 | DW_STRING (attr) | |
21802 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
e3b94546 | 21803 | &objfile->per_bfd->storage_obstack); |
907af001 | 21804 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21805 | } |
907af001 | 21806 | return DW_STRING (attr); |
9219021c DC |
21807 | } |
21808 | ||
21809 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21810 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21811 | containing the return value on output. */ | |
9219021c DC |
21812 | |
21813 | static struct die_info * | |
f2f0e013 | 21814 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21815 | { |
21816 | struct attribute *attr; | |
9219021c | 21817 | |
f2f0e013 | 21818 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21819 | if (attr == NULL) |
21820 | return NULL; | |
21821 | ||
f2f0e013 | 21822 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21823 | } |
21824 | ||
fa9c3fa0 TT |
21825 | /* A convenience function that returns an "unknown" DWARF name, |
21826 | including the value of V. STR is the name of the entity being | |
21827 | printed, e.g., "TAG". */ | |
21828 | ||
21829 | static const char * | |
21830 | dwarf_unknown (const char *str, unsigned v) | |
21831 | { | |
21832 | char *cell = get_print_cell (); | |
21833 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
21834 | return cell; | |
21835 | } | |
21836 | ||
c906108c SS |
21837 | /* Convert a DIE tag into its string name. */ |
21838 | ||
f39c6ffd | 21839 | static const char * |
aa1ee363 | 21840 | dwarf_tag_name (unsigned tag) |
c906108c | 21841 | { |
f39c6ffd TT |
21842 | const char *name = get_DW_TAG_name (tag); |
21843 | ||
21844 | if (name == NULL) | |
fa9c3fa0 | 21845 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
21846 | |
21847 | return name; | |
c906108c SS |
21848 | } |
21849 | ||
21850 | /* Convert a DWARF attribute code into its string name. */ | |
21851 | ||
f39c6ffd | 21852 | static const char * |
aa1ee363 | 21853 | dwarf_attr_name (unsigned attr) |
c906108c | 21854 | { |
f39c6ffd TT |
21855 | const char *name; |
21856 | ||
c764a876 | 21857 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21858 | if (attr == DW_AT_MIPS_fde) |
21859 | return "DW_AT_MIPS_fde"; | |
21860 | #else | |
21861 | if (attr == DW_AT_HP_block_index) | |
21862 | return "DW_AT_HP_block_index"; | |
c764a876 | 21863 | #endif |
f39c6ffd TT |
21864 | |
21865 | name = get_DW_AT_name (attr); | |
21866 | ||
21867 | if (name == NULL) | |
fa9c3fa0 | 21868 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
21869 | |
21870 | return name; | |
c906108c SS |
21871 | } |
21872 | ||
21873 | /* Convert a DWARF value form code into its string name. */ | |
21874 | ||
f39c6ffd | 21875 | static const char * |
aa1ee363 | 21876 | dwarf_form_name (unsigned form) |
c906108c | 21877 | { |
f39c6ffd TT |
21878 | const char *name = get_DW_FORM_name (form); |
21879 | ||
21880 | if (name == NULL) | |
fa9c3fa0 | 21881 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
21882 | |
21883 | return name; | |
c906108c SS |
21884 | } |
21885 | ||
a121b7c1 | 21886 | static const char * |
fba45db2 | 21887 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21888 | { |
21889 | if (mybool) | |
21890 | return "TRUE"; | |
21891 | else | |
21892 | return "FALSE"; | |
21893 | } | |
21894 | ||
21895 | /* Convert a DWARF type code into its string name. */ | |
21896 | ||
f39c6ffd | 21897 | static const char * |
aa1ee363 | 21898 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21899 | { |
f39c6ffd | 21900 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21901 | |
f39c6ffd | 21902 | if (name == NULL) |
fa9c3fa0 | 21903 | return dwarf_unknown ("ATE", enc); |
c906108c | 21904 | |
f39c6ffd | 21905 | return name; |
c906108c | 21906 | } |
c906108c | 21907 | |
f9aca02d | 21908 | static void |
d97bc12b | 21909 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21910 | { |
21911 | unsigned int i; | |
21912 | ||
d97bc12b | 21913 | print_spaces (indent, f); |
9d8780f0 | 21914 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 21915 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 21916 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
21917 | |
21918 | if (die->parent != NULL) | |
21919 | { | |
21920 | print_spaces (indent, f); | |
9d8780f0 SM |
21921 | fprintf_unfiltered (f, " parent at offset: %s\n", |
21922 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
21923 | } |
21924 | ||
21925 | print_spaces (indent, f); | |
21926 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21927 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21928 | |
d97bc12b DE |
21929 | print_spaces (indent, f); |
21930 | fprintf_unfiltered (f, " attributes:\n"); | |
21931 | ||
c906108c SS |
21932 | for (i = 0; i < die->num_attrs; ++i) |
21933 | { | |
d97bc12b DE |
21934 | print_spaces (indent, f); |
21935 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21936 | dwarf_attr_name (die->attrs[i].name), |
21937 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21938 | |
c906108c SS |
21939 | switch (die->attrs[i].form) |
21940 | { | |
c906108c | 21941 | case DW_FORM_addr: |
336d760d | 21942 | case DW_FORM_addrx: |
3019eac3 | 21943 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21944 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21945 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21946 | break; |
21947 | case DW_FORM_block2: | |
21948 | case DW_FORM_block4: | |
21949 | case DW_FORM_block: | |
21950 | case DW_FORM_block1: | |
56eb65bd SP |
21951 | fprintf_unfiltered (f, "block: size %s", |
21952 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21953 | break; |
2dc7f7b3 | 21954 | case DW_FORM_exprloc: |
56eb65bd SP |
21955 | fprintf_unfiltered (f, "expression: size %s", |
21956 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21957 | break; |
0224619f JK |
21958 | case DW_FORM_data16: |
21959 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21960 | break; | |
4568ecf9 DE |
21961 | case DW_FORM_ref_addr: |
21962 | fprintf_unfiltered (f, "ref address: "); | |
21963 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21964 | break; | |
36586728 TT |
21965 | case DW_FORM_GNU_ref_alt: |
21966 | fprintf_unfiltered (f, "alt ref address: "); | |
21967 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21968 | break; | |
10b3939b DJ |
21969 | case DW_FORM_ref1: |
21970 | case DW_FORM_ref2: | |
21971 | case DW_FORM_ref4: | |
4568ecf9 DE |
21972 | case DW_FORM_ref8: |
21973 | case DW_FORM_ref_udata: | |
d97bc12b | 21974 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21975 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21976 | break; |
c906108c SS |
21977 | case DW_FORM_data1: |
21978 | case DW_FORM_data2: | |
21979 | case DW_FORM_data4: | |
ce5d95e1 | 21980 | case DW_FORM_data8: |
c906108c SS |
21981 | case DW_FORM_udata: |
21982 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21983 | fprintf_unfiltered (f, "constant: %s", |
21984 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21985 | break; |
2dc7f7b3 TT |
21986 | case DW_FORM_sec_offset: |
21987 | fprintf_unfiltered (f, "section offset: %s", | |
21988 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21989 | break; | |
55f1336d | 21990 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21991 | fprintf_unfiltered (f, "signature: %s", |
21992 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21993 | break; |
c906108c | 21994 | case DW_FORM_string: |
4bdf3d34 | 21995 | case DW_FORM_strp: |
43988095 | 21996 | case DW_FORM_line_strp: |
cf532bd1 | 21997 | case DW_FORM_strx: |
3019eac3 | 21998 | case DW_FORM_GNU_str_index: |
36586728 | 21999 | case DW_FORM_GNU_strp_alt: |
8285870a | 22000 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 22001 | DW_STRING (&die->attrs[i]) |
8285870a JK |
22002 | ? DW_STRING (&die->attrs[i]) : "", |
22003 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
22004 | break; |
22005 | case DW_FORM_flag: | |
22006 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 22007 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22008 | else |
d97bc12b | 22009 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22010 | break; |
2dc7f7b3 TT |
22011 | case DW_FORM_flag_present: |
22012 | fprintf_unfiltered (f, "flag: TRUE"); | |
22013 | break; | |
a8329558 | 22014 | case DW_FORM_indirect: |
0963b4bd MS |
22015 | /* The reader will have reduced the indirect form to |
22016 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 22017 | fprintf_unfiltered (f, |
3e43a32a | 22018 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 22019 | break; |
663c44ac JK |
22020 | case DW_FORM_implicit_const: |
22021 | fprintf_unfiltered (f, "constant: %s", | |
22022 | plongest (DW_SND (&die->attrs[i]))); | |
22023 | break; | |
c906108c | 22024 | default: |
d97bc12b | 22025 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22026 | die->attrs[i].form); |
d97bc12b | 22027 | break; |
c906108c | 22028 | } |
d97bc12b | 22029 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22030 | } |
22031 | } | |
22032 | ||
f9aca02d | 22033 | static void |
d97bc12b | 22034 | dump_die_for_error (struct die_info *die) |
c906108c | 22035 | { |
d97bc12b DE |
22036 | dump_die_shallow (gdb_stderr, 0, die); |
22037 | } | |
22038 | ||
22039 | static void | |
22040 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22041 | { | |
22042 | int indent = level * 4; | |
22043 | ||
22044 | gdb_assert (die != NULL); | |
22045 | ||
22046 | if (level >= max_level) | |
22047 | return; | |
22048 | ||
22049 | dump_die_shallow (f, indent, die); | |
22050 | ||
22051 | if (die->child != NULL) | |
c906108c | 22052 | { |
d97bc12b DE |
22053 | print_spaces (indent, f); |
22054 | fprintf_unfiltered (f, " Children:"); | |
22055 | if (level + 1 < max_level) | |
22056 | { | |
22057 | fprintf_unfiltered (f, "\n"); | |
22058 | dump_die_1 (f, level + 1, max_level, die->child); | |
22059 | } | |
22060 | else | |
22061 | { | |
3e43a32a MS |
22062 | fprintf_unfiltered (f, |
22063 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22064 | } |
22065 | } | |
22066 | ||
22067 | if (die->sibling != NULL && level > 0) | |
22068 | { | |
22069 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22070 | } |
22071 | } | |
22072 | ||
d97bc12b DE |
22073 | /* This is called from the pdie macro in gdbinit.in. |
22074 | It's not static so gcc will keep a copy callable from gdb. */ | |
22075 | ||
22076 | void | |
22077 | dump_die (struct die_info *die, int max_level) | |
22078 | { | |
22079 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22080 | } | |
22081 | ||
f9aca02d | 22082 | static void |
51545339 | 22083 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22084 | { |
51545339 | 22085 | void **slot; |
c906108c | 22086 | |
9c541725 PA |
22087 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22088 | to_underlying (die->sect_off), | |
b64f50a1 | 22089 | INSERT); |
51545339 DJ |
22090 | |
22091 | *slot = die; | |
c906108c SS |
22092 | } |
22093 | ||
b64f50a1 JK |
22094 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
22095 | required kind. */ | |
22096 | ||
22097 | static sect_offset | |
ff39bb5e | 22098 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 22099 | { |
cd6c91b4 | 22100 | if (attr->form_is_ref ()) |
9c541725 | 22101 | return (sect_offset) DW_UNSND (attr); |
93311388 | 22102 | |
b98664d3 | 22103 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 22104 | dwarf_form_name (attr->form)); |
9c541725 | 22105 | return {}; |
c906108c SS |
22106 | } |
22107 | ||
43bbcdc2 PH |
22108 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
22109 | * the value held by the attribute is not constant. */ | |
a02abb62 | 22110 | |
43bbcdc2 | 22111 | static LONGEST |
ff39bb5e | 22112 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 22113 | { |
663c44ac | 22114 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
22115 | return DW_SND (attr); |
22116 | else if (attr->form == DW_FORM_udata | |
22117 | || attr->form == DW_FORM_data1 | |
22118 | || attr->form == DW_FORM_data2 | |
22119 | || attr->form == DW_FORM_data4 | |
22120 | || attr->form == DW_FORM_data8) | |
22121 | return DW_UNSND (attr); | |
22122 | else | |
22123 | { | |
cd6c91b4 | 22124 | /* For DW_FORM_data16 see attribute::form_is_constant. */ |
b98664d3 | 22125 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
22126 | dwarf_form_name (attr->form)); |
22127 | return default_value; | |
22128 | } | |
22129 | } | |
22130 | ||
348e048f DE |
22131 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22132 | On entry *REF_CU is the CU of SRC_DIE. | |
22133 | On exit *REF_CU is the CU of the result. */ | |
22134 | ||
22135 | static struct die_info * | |
ff39bb5e | 22136 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22137 | struct dwarf2_cu **ref_cu) |
22138 | { | |
22139 | struct die_info *die; | |
22140 | ||
cd6c91b4 | 22141 | if (attr->form_is_ref ()) |
348e048f | 22142 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22143 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22144 | die = follow_die_sig (src_die, attr, ref_cu); |
22145 | else | |
22146 | { | |
22147 | dump_die_for_error (src_die); | |
22148 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 22149 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
22150 | } |
22151 | ||
22152 | return die; | |
03dd20cc DJ |
22153 | } |
22154 | ||
5c631832 | 22155 | /* Follow reference OFFSET. |
673bfd45 DE |
22156 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22157 | On exit *REF_CU is the CU of the result. | |
22158 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22159 | |
f9aca02d | 22160 | static struct die_info * |
9c541725 | 22161 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22162 | struct dwarf2_cu **ref_cu) |
c906108c | 22163 | { |
10b3939b | 22164 | struct die_info temp_die; |
f2f0e013 | 22165 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
22166 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22167 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 22168 | |
348e048f DE |
22169 | gdb_assert (cu->per_cu != NULL); |
22170 | ||
98bfdba5 PA |
22171 | target_cu = cu; |
22172 | ||
3019eac3 | 22173 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22174 | { |
22175 | /* .debug_types CUs cannot reference anything outside their CU. | |
22176 | If they need to, they have to reference a signatured type via | |
55f1336d | 22177 | DW_FORM_ref_sig8. */ |
4057dfde | 22178 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 22179 | return NULL; |
348e048f | 22180 | } |
36586728 | 22181 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 22182 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
22183 | { |
22184 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22185 | |
9c541725 | 22186 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 22187 | dwarf2_per_objfile); |
03dd20cc DJ |
22188 | |
22189 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 22190 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 22191 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 22192 | |
10b3939b DJ |
22193 | target_cu = per_cu->cu; |
22194 | } | |
98bfdba5 PA |
22195 | else if (cu->dies == NULL) |
22196 | { | |
22197 | /* We're loading full DIEs during partial symbol reading. */ | |
22198 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 22199 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 22200 | } |
c906108c | 22201 | |
f2f0e013 | 22202 | *ref_cu = target_cu; |
9c541725 | 22203 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
22204 | |
22205 | if (target_cu != cu) | |
22206 | target_cu->ancestor = cu; | |
22207 | ||
9a3c8263 | 22208 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22209 | &temp_die, |
22210 | to_underlying (sect_off)); | |
5c631832 | 22211 | } |
10b3939b | 22212 | |
5c631832 JK |
22213 | /* Follow reference attribute ATTR of SRC_DIE. |
22214 | On entry *REF_CU is the CU of SRC_DIE. | |
22215 | On exit *REF_CU is the CU of the result. */ | |
22216 | ||
22217 | static struct die_info * | |
ff39bb5e | 22218 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22219 | struct dwarf2_cu **ref_cu) |
22220 | { | |
9c541725 | 22221 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
22222 | struct dwarf2_cu *cu = *ref_cu; |
22223 | struct die_info *die; | |
22224 | ||
9c541725 | 22225 | die = follow_die_offset (sect_off, |
36586728 TT |
22226 | (attr->form == DW_FORM_GNU_ref_alt |
22227 | || cu->per_cu->is_dwz), | |
22228 | ref_cu); | |
5c631832 | 22229 | if (!die) |
9d8780f0 SM |
22230 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
22231 | "at %s [in module %s]"), | |
22232 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 22233 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 22234 | |
5c631832 JK |
22235 | return die; |
22236 | } | |
22237 | ||
d4c9a4f8 | 22238 | /* See read.h. */ |
5c631832 JK |
22239 | |
22240 | struct dwarf2_locexpr_baton | |
9c541725 | 22241 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22242 | dwarf2_per_cu_data *per_cu, |
8b9737bf | 22243 | CORE_ADDR (*get_frame_pc) (void *baton), |
e4a62c65 | 22244 | void *baton, bool resolve_abstract_p) |
5c631832 | 22245 | { |
918dd910 | 22246 | struct dwarf2_cu *cu; |
5c631832 JK |
22247 | struct die_info *die; |
22248 | struct attribute *attr; | |
22249 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
22250 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
22251 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 22252 | |
918dd910 | 22253 | if (per_cu->cu == NULL) |
58f0c718 | 22254 | load_cu (per_cu, false); |
918dd910 | 22255 | cu = per_cu->cu; |
cc12ce38 DE |
22256 | if (cu == NULL) |
22257 | { | |
22258 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22259 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22260 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22261 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22262 | } |
918dd910 | 22263 | |
9c541725 | 22264 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 22265 | if (!die) |
9d8780f0 SM |
22266 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22267 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
22268 | |
22269 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 22270 | if (!attr && resolve_abstract_p |
3360b6e7 | 22271 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
22272 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
22273 | { | |
22274 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
b3b3bada | 22275 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
eba4caf2 | 22276 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
e4a62c65 | 22277 | |
3360b6e7 TV |
22278 | for (const auto &cand_off |
22279 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 22280 | { |
3360b6e7 TV |
22281 | struct dwarf2_cu *cand_cu = cu; |
22282 | struct die_info *cand | |
22283 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
22284 | if (!cand | |
22285 | || !cand->parent | |
e4a62c65 TV |
22286 | || cand->parent->tag != DW_TAG_subprogram) |
22287 | continue; | |
22288 | ||
22289 | CORE_ADDR pc_low, pc_high; | |
22290 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
22291 | if (pc_low == ((CORE_ADDR) -1)) |
22292 | continue; | |
22293 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
22294 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
22295 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
22296 | continue; |
22297 | ||
22298 | die = cand; | |
22299 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22300 | break; | |
22301 | } | |
22302 | } | |
22303 | ||
5c631832 JK |
22304 | if (!attr) |
22305 | { | |
e103e986 JK |
22306 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22307 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22308 | |
e103e986 | 22309 | retval.data = NULL; |
5c631832 JK |
22310 | retval.size = 0; |
22311 | } | |
cd6c91b4 | 22312 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
22313 | { |
22314 | struct dwarf2_loclist_baton loclist_baton; | |
22315 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22316 | size_t size; | |
22317 | ||
22318 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22319 | ||
22320 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22321 | &size, pc); | |
22322 | retval.size = size; | |
22323 | } | |
5c631832 JK |
22324 | else |
22325 | { | |
4fc6c0d5 | 22326 | if (!attr->form_is_block ()) |
9d8780f0 | 22327 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 22328 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 22329 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
22330 | |
22331 | retval.data = DW_BLOCK (attr)->data; | |
22332 | retval.size = DW_BLOCK (attr)->size; | |
22333 | } | |
22334 | retval.per_cu = cu->per_cu; | |
918dd910 | 22335 | |
ed2dc618 | 22336 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 22337 | |
5c631832 | 22338 | return retval; |
348e048f DE |
22339 | } |
22340 | ||
d4c9a4f8 | 22341 | /* See read.h. */ |
8b9737bf TT |
22342 | |
22343 | struct dwarf2_locexpr_baton | |
22344 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 22345 | dwarf2_per_cu_data *per_cu, |
8b9737bf TT |
22346 | CORE_ADDR (*get_frame_pc) (void *baton), |
22347 | void *baton) | |
22348 | { | |
9c541725 | 22349 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22350 | |
9c541725 | 22351 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22352 | } |
22353 | ||
b6807d98 TT |
22354 | /* Write a constant of a given type as target-ordered bytes into |
22355 | OBSTACK. */ | |
22356 | ||
22357 | static const gdb_byte * | |
22358 | write_constant_as_bytes (struct obstack *obstack, | |
22359 | enum bfd_endian byte_order, | |
22360 | struct type *type, | |
22361 | ULONGEST value, | |
22362 | LONGEST *len) | |
22363 | { | |
22364 | gdb_byte *result; | |
22365 | ||
22366 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22367 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22368 | store_unsigned_integer (result, *len, byte_order, value); |
22369 | ||
22370 | return result; | |
22371 | } | |
22372 | ||
d4c9a4f8 | 22373 | /* See read.h. */ |
b6807d98 TT |
22374 | |
22375 | const gdb_byte * | |
9c541725 | 22376 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 SM |
22377 | dwarf2_per_cu_data *per_cu, |
22378 | obstack *obstack, | |
b6807d98 TT |
22379 | LONGEST *len) |
22380 | { | |
22381 | struct dwarf2_cu *cu; | |
22382 | struct die_info *die; | |
22383 | struct attribute *attr; | |
22384 | const gdb_byte *result = NULL; | |
22385 | struct type *type; | |
22386 | LONGEST value; | |
22387 | enum bfd_endian byte_order; | |
e3b94546 | 22388 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 22389 | |
b6807d98 | 22390 | if (per_cu->cu == NULL) |
58f0c718 | 22391 | load_cu (per_cu, false); |
b6807d98 | 22392 | cu = per_cu->cu; |
cc12ce38 DE |
22393 | if (cu == NULL) |
22394 | { | |
22395 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22396 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22397 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22398 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22399 | } |
b6807d98 | 22400 | |
9c541725 | 22401 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 22402 | if (!die) |
9d8780f0 SM |
22403 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22404 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
22405 | |
22406 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
22407 | if (attr == NULL) | |
22408 | return NULL; | |
22409 | ||
e3b94546 | 22410 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
22411 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
22412 | ||
22413 | switch (attr->form) | |
22414 | { | |
22415 | case DW_FORM_addr: | |
336d760d | 22416 | case DW_FORM_addrx: |
b6807d98 TT |
22417 | case DW_FORM_GNU_addr_index: |
22418 | { | |
22419 | gdb_byte *tem; | |
22420 | ||
22421 | *len = cu->header.addr_size; | |
224c3ddb | 22422 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22423 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
22424 | result = tem; | |
22425 | } | |
22426 | break; | |
22427 | case DW_FORM_string: | |
22428 | case DW_FORM_strp: | |
cf532bd1 | 22429 | case DW_FORM_strx: |
b6807d98 TT |
22430 | case DW_FORM_GNU_str_index: |
22431 | case DW_FORM_GNU_strp_alt: | |
22432 | /* DW_STRING is already allocated on the objfile obstack, point | |
22433 | directly to it. */ | |
22434 | result = (const gdb_byte *) DW_STRING (attr); | |
22435 | *len = strlen (DW_STRING (attr)); | |
22436 | break; | |
22437 | case DW_FORM_block1: | |
22438 | case DW_FORM_block2: | |
22439 | case DW_FORM_block4: | |
22440 | case DW_FORM_block: | |
22441 | case DW_FORM_exprloc: | |
0224619f | 22442 | case DW_FORM_data16: |
b6807d98 TT |
22443 | result = DW_BLOCK (attr)->data; |
22444 | *len = DW_BLOCK (attr)->size; | |
22445 | break; | |
22446 | ||
22447 | /* The DW_AT_const_value attributes are supposed to carry the | |
22448 | symbol's value "represented as it would be on the target | |
22449 | architecture." By the time we get here, it's already been | |
22450 | converted to host endianness, so we just need to sign- or | |
22451 | zero-extend it as appropriate. */ | |
22452 | case DW_FORM_data1: | |
22453 | type = die_type (die, cu); | |
22454 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
22455 | if (result == NULL) | |
22456 | result = write_constant_as_bytes (obstack, byte_order, | |
22457 | type, value, len); | |
22458 | break; | |
22459 | case DW_FORM_data2: | |
22460 | type = die_type (die, cu); | |
22461 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
22462 | if (result == NULL) | |
22463 | result = write_constant_as_bytes (obstack, byte_order, | |
22464 | type, value, len); | |
22465 | break; | |
22466 | case DW_FORM_data4: | |
22467 | type = die_type (die, cu); | |
22468 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
22469 | if (result == NULL) | |
22470 | result = write_constant_as_bytes (obstack, byte_order, | |
22471 | type, value, len); | |
22472 | break; | |
22473 | case DW_FORM_data8: | |
22474 | type = die_type (die, cu); | |
22475 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
22476 | if (result == NULL) | |
22477 | result = write_constant_as_bytes (obstack, byte_order, | |
22478 | type, value, len); | |
22479 | break; | |
22480 | ||
22481 | case DW_FORM_sdata: | |
663c44ac | 22482 | case DW_FORM_implicit_const: |
b6807d98 TT |
22483 | type = die_type (die, cu); |
22484 | result = write_constant_as_bytes (obstack, byte_order, | |
22485 | type, DW_SND (attr), len); | |
22486 | break; | |
22487 | ||
22488 | case DW_FORM_udata: | |
22489 | type = die_type (die, cu); | |
22490 | result = write_constant_as_bytes (obstack, byte_order, | |
22491 | type, DW_UNSND (attr), len); | |
22492 | break; | |
22493 | ||
22494 | default: | |
b98664d3 | 22495 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
22496 | dwarf_form_name (attr->form)); |
22497 | break; | |
22498 | } | |
22499 | ||
22500 | return result; | |
22501 | } | |
22502 | ||
d4c9a4f8 | 22503 | /* See read.h. */ |
7942e96e AA |
22504 | |
22505 | struct type * | |
9c541725 | 22506 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22507 | dwarf2_per_cu_data *per_cu) |
7942e96e AA |
22508 | { |
22509 | struct dwarf2_cu *cu; | |
22510 | struct die_info *die; | |
22511 | ||
7942e96e | 22512 | if (per_cu->cu == NULL) |
58f0c718 | 22513 | load_cu (per_cu, false); |
7942e96e AA |
22514 | cu = per_cu->cu; |
22515 | if (!cu) | |
22516 | return NULL; | |
22517 | ||
9c541725 | 22518 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
22519 | if (!die) |
22520 | return NULL; | |
22521 | ||
22522 | return die_type (die, cu); | |
22523 | } | |
22524 | ||
8cb5117c | 22525 | /* See read.h. */ |
8a9b8146 TT |
22526 | |
22527 | struct type * | |
b64f50a1 | 22528 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
22529 | struct dwarf2_per_cu_data *per_cu) |
22530 | { | |
9c541725 | 22531 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 22532 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
22533 | } |
22534 | ||
ac9ec31b | 22535 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 22536 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
22537 | On exit *REF_CU is the CU of the result. |
22538 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
22539 | |
22540 | static struct die_info * | |
ac9ec31b DE |
22541 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
22542 | struct dwarf2_cu **ref_cu) | |
348e048f | 22543 | { |
348e048f | 22544 | struct die_info temp_die; |
c24bdb02 | 22545 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
22546 | struct die_info *die; |
22547 | ||
ac9ec31b DE |
22548 | /* While it might be nice to assert sig_type->type == NULL here, |
22549 | we can get here for DW_AT_imported_declaration where we need | |
22550 | the DIE not the type. */ | |
348e048f DE |
22551 | |
22552 | /* If necessary, add it to the queue and load its DIEs. */ | |
22553 | ||
95554aad | 22554 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 22555 | read_signatured_type (sig_type); |
348e048f | 22556 | |
348e048f | 22557 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 22558 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
22559 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
22560 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 22561 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 22562 | to_underlying (temp_die.sect_off)); |
348e048f DE |
22563 | if (die) |
22564 | { | |
ed2dc618 | 22565 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 22566 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 22567 | |
796a7ff8 DE |
22568 | /* For .gdb_index version 7 keep track of included TUs. |
22569 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
22570 | if (dwarf2_per_objfile->index_table != NULL | |
22571 | && dwarf2_per_objfile->index_table->version <= 7) | |
22572 | { | |
ae640021 | 22573 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
22574 | } |
22575 | ||
348e048f | 22576 | *ref_cu = sig_cu; |
c24bdb02 KS |
22577 | if (sig_cu != cu) |
22578 | sig_cu->ancestor = cu; | |
22579 | ||
348e048f DE |
22580 | return die; |
22581 | } | |
22582 | ||
ac9ec31b DE |
22583 | return NULL; |
22584 | } | |
22585 | ||
22586 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
22587 | On entry *REF_CU is the CU of SRC_DIE. | |
22588 | On exit *REF_CU is the CU of the result. | |
22589 | The result is the DIE of the type. | |
22590 | If the referenced type cannot be found an error is thrown. */ | |
22591 | ||
22592 | static struct die_info * | |
ff39bb5e | 22593 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
22594 | struct dwarf2_cu **ref_cu) |
22595 | { | |
22596 | ULONGEST signature = DW_SIGNATURE (attr); | |
22597 | struct signatured_type *sig_type; | |
22598 | struct die_info *die; | |
22599 | ||
22600 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
22601 | ||
a2ce51a0 | 22602 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
22603 | /* sig_type will be NULL if the signatured type is missing from |
22604 | the debug info. */ | |
22605 | if (sig_type == NULL) | |
22606 | { | |
22607 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
22608 | " from DIE at %s [in module %s]"), |
22609 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22610 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22611 | } |
22612 | ||
22613 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
22614 | if (die == NULL) | |
22615 | { | |
22616 | dump_die_for_error (src_die); | |
22617 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
22618 | " from DIE at %s [in module %s]"), |
22619 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22620 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22621 | } |
22622 | ||
22623 | return die; | |
22624 | } | |
22625 | ||
22626 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
22627 | reading in and processing the type unit if necessary. */ | |
22628 | ||
22629 | static struct type * | |
22630 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
22631 | struct dwarf2_cu *cu) | |
22632 | { | |
518817b3 SM |
22633 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22634 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
22635 | struct signatured_type *sig_type; |
22636 | struct dwarf2_cu *type_cu; | |
22637 | struct die_info *type_die; | |
22638 | struct type *type; | |
22639 | ||
a2ce51a0 | 22640 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
22641 | /* sig_type will be NULL if the signatured type is missing from |
22642 | the debug info. */ | |
22643 | if (sig_type == NULL) | |
22644 | { | |
b98664d3 | 22645 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
22646 | " from DIE at %s [in module %s]"), |
22647 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22648 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22649 | return build_error_marker_type (cu, die); |
22650 | } | |
22651 | ||
22652 | /* If we already know the type we're done. */ | |
22653 | if (sig_type->type != NULL) | |
22654 | return sig_type->type; | |
22655 | ||
22656 | type_cu = cu; | |
22657 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22658 | if (type_die != NULL) | |
22659 | { | |
22660 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22661 | is created. This is important, for example, because for c++ classes | |
22662 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22663 | type = read_type_die (type_die, type_cu); | |
22664 | if (type == NULL) | |
22665 | { | |
b98664d3 | 22666 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
22667 | " referenced from DIE at %s [in module %s]"), |
22668 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22669 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22670 | type = build_error_marker_type (cu, die); |
22671 | } | |
22672 | } | |
22673 | else | |
22674 | { | |
b98664d3 | 22675 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
22676 | " from DIE at %s [in module %s]"), |
22677 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22678 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22679 | type = build_error_marker_type (cu, die); |
22680 | } | |
22681 | sig_type->type = type; | |
22682 | ||
22683 | return type; | |
22684 | } | |
22685 | ||
22686 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22687 | reading in and processing the type unit if necessary. */ | |
22688 | ||
22689 | static struct type * | |
ff39bb5e | 22690 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22691 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22692 | { |
22693 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 22694 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22695 | { |
22696 | struct dwarf2_cu *type_cu = cu; | |
22697 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22698 | ||
22699 | return read_type_die (type_die, type_cu); | |
22700 | } | |
22701 | else if (attr->form == DW_FORM_ref_sig8) | |
22702 | { | |
22703 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22704 | } | |
22705 | else | |
22706 | { | |
518817b3 SM |
22707 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22708 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22709 | |
b98664d3 | 22710 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
22711 | " at %s [in module %s]"), |
22712 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 22713 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22714 | return build_error_marker_type (cu, die); |
22715 | } | |
348e048f DE |
22716 | } |
22717 | ||
e5fe5e75 | 22718 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22719 | |
22720 | static void | |
e5fe5e75 | 22721 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22722 | { |
52dc124a | 22723 | struct signatured_type *sig_type; |
348e048f | 22724 | |
f4dc4d17 | 22725 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 22726 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 22727 | |
6721b2ec DE |
22728 | /* We have the per_cu, but we need the signatured_type. |
22729 | Fortunately this is an easy translation. */ | |
22730 | gdb_assert (per_cu->is_debug_types); | |
22731 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22732 | |
6721b2ec | 22733 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22734 | |
52dc124a | 22735 | read_signatured_type (sig_type); |
348e048f | 22736 | |
6721b2ec | 22737 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22738 | } |
22739 | ||
3019eac3 DE |
22740 | /* Read in a signatured type and build its CU and DIEs. |
22741 | If the type is a stub for the real type in a DWO file, | |
22742 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22743 | |
22744 | static void | |
22745 | read_signatured_type (struct signatured_type *sig_type) | |
22746 | { | |
22747 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22748 | |
3019eac3 | 22749 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22750 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22751 | |
6751ebae | 22752 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
22753 | |
22754 | if (!reader.dummy_p) | |
22755 | { | |
22756 | struct dwarf2_cu *cu = reader.cu; | |
22757 | const gdb_byte *info_ptr = reader.info_ptr; | |
22758 | ||
22759 | gdb_assert (cu->die_hash == NULL); | |
22760 | cu->die_hash = | |
22761 | htab_create_alloc_ex (cu->header.length / 12, | |
22762 | die_hash, | |
22763 | die_eq, | |
22764 | NULL, | |
22765 | &cu->comp_unit_obstack, | |
22766 | hashtab_obstack_allocate, | |
22767 | dummy_obstack_deallocate); | |
22768 | ||
3e225074 | 22769 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
22770 | reader.comp_unit_die->child |
22771 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
22772 | reader.comp_unit_die); | |
22773 | cu->dies = reader.comp_unit_die; | |
22774 | /* comp_unit_die is not stored in die_hash, no need. */ | |
22775 | ||
22776 | /* We try not to read any attributes in this function, because | |
22777 | not all CUs needed for references have been loaded yet, and | |
22778 | symbol table processing isn't initialized. But we have to | |
22779 | set the CU language, or we won't be able to build types | |
22780 | correctly. Similarly, if we do not read the producer, we can | |
22781 | not apply producer-specific interpretation. */ | |
22782 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
22783 | |
22784 | reader.keep (); | |
c0ab21c2 TT |
22785 | } |
22786 | ||
7ee85ab1 | 22787 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22788 | } |
22789 | ||
c906108c SS |
22790 | /* Decode simple location descriptions. |
22791 | Given a pointer to a dwarf block that defines a location, compute | |
22792 | the location and return the value. | |
22793 | ||
4cecd739 DJ |
22794 | NOTE drow/2003-11-18: This function is called in two situations |
22795 | now: for the address of static or global variables (partial symbols | |
22796 | only) and for offsets into structures which are expected to be | |
22797 | (more or less) constant. The partial symbol case should go away, | |
22798 | and only the constant case should remain. That will let this | |
22799 | function complain more accurately. A few special modes are allowed | |
22800 | without complaint for global variables (for instance, global | |
22801 | register values and thread-local values). | |
c906108c SS |
22802 | |
22803 | A location description containing no operations indicates that the | |
4cecd739 | 22804 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22805 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22806 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22807 | complaint. |
22808 | ||
22809 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22810 | |
22811 | static CORE_ADDR | |
e7c27a73 | 22812 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22813 | { |
518817b3 | 22814 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
22815 | size_t i; |
22816 | size_t size = blk->size; | |
d521ce57 | 22817 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22818 | CORE_ADDR stack[64]; |
22819 | int stacki; | |
22820 | unsigned int bytes_read, unsnd; | |
22821 | gdb_byte op; | |
c906108c | 22822 | |
21ae7a4d JK |
22823 | i = 0; |
22824 | stacki = 0; | |
22825 | stack[stacki] = 0; | |
22826 | stack[++stacki] = 0; | |
22827 | ||
22828 | while (i < size) | |
22829 | { | |
22830 | op = data[i++]; | |
22831 | switch (op) | |
22832 | { | |
22833 | case DW_OP_lit0: | |
22834 | case DW_OP_lit1: | |
22835 | case DW_OP_lit2: | |
22836 | case DW_OP_lit3: | |
22837 | case DW_OP_lit4: | |
22838 | case DW_OP_lit5: | |
22839 | case DW_OP_lit6: | |
22840 | case DW_OP_lit7: | |
22841 | case DW_OP_lit8: | |
22842 | case DW_OP_lit9: | |
22843 | case DW_OP_lit10: | |
22844 | case DW_OP_lit11: | |
22845 | case DW_OP_lit12: | |
22846 | case DW_OP_lit13: | |
22847 | case DW_OP_lit14: | |
22848 | case DW_OP_lit15: | |
22849 | case DW_OP_lit16: | |
22850 | case DW_OP_lit17: | |
22851 | case DW_OP_lit18: | |
22852 | case DW_OP_lit19: | |
22853 | case DW_OP_lit20: | |
22854 | case DW_OP_lit21: | |
22855 | case DW_OP_lit22: | |
22856 | case DW_OP_lit23: | |
22857 | case DW_OP_lit24: | |
22858 | case DW_OP_lit25: | |
22859 | case DW_OP_lit26: | |
22860 | case DW_OP_lit27: | |
22861 | case DW_OP_lit28: | |
22862 | case DW_OP_lit29: | |
22863 | case DW_OP_lit30: | |
22864 | case DW_OP_lit31: | |
22865 | stack[++stacki] = op - DW_OP_lit0; | |
22866 | break; | |
f1bea926 | 22867 | |
21ae7a4d JK |
22868 | case DW_OP_reg0: |
22869 | case DW_OP_reg1: | |
22870 | case DW_OP_reg2: | |
22871 | case DW_OP_reg3: | |
22872 | case DW_OP_reg4: | |
22873 | case DW_OP_reg5: | |
22874 | case DW_OP_reg6: | |
22875 | case DW_OP_reg7: | |
22876 | case DW_OP_reg8: | |
22877 | case DW_OP_reg9: | |
22878 | case DW_OP_reg10: | |
22879 | case DW_OP_reg11: | |
22880 | case DW_OP_reg12: | |
22881 | case DW_OP_reg13: | |
22882 | case DW_OP_reg14: | |
22883 | case DW_OP_reg15: | |
22884 | case DW_OP_reg16: | |
22885 | case DW_OP_reg17: | |
22886 | case DW_OP_reg18: | |
22887 | case DW_OP_reg19: | |
22888 | case DW_OP_reg20: | |
22889 | case DW_OP_reg21: | |
22890 | case DW_OP_reg22: | |
22891 | case DW_OP_reg23: | |
22892 | case DW_OP_reg24: | |
22893 | case DW_OP_reg25: | |
22894 | case DW_OP_reg26: | |
22895 | case DW_OP_reg27: | |
22896 | case DW_OP_reg28: | |
22897 | case DW_OP_reg29: | |
22898 | case DW_OP_reg30: | |
22899 | case DW_OP_reg31: | |
22900 | stack[++stacki] = op - DW_OP_reg0; | |
22901 | if (i < size) | |
22902 | dwarf2_complex_location_expr_complaint (); | |
22903 | break; | |
c906108c | 22904 | |
21ae7a4d JK |
22905 | case DW_OP_regx: |
22906 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22907 | i += bytes_read; | |
22908 | stack[++stacki] = unsnd; | |
22909 | if (i < size) | |
22910 | dwarf2_complex_location_expr_complaint (); | |
22911 | break; | |
c906108c | 22912 | |
21ae7a4d | 22913 | case DW_OP_addr: |
c8a7a66f TT |
22914 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
22915 | &bytes_read); | |
21ae7a4d JK |
22916 | i += bytes_read; |
22917 | break; | |
d53d4ac5 | 22918 | |
21ae7a4d JK |
22919 | case DW_OP_const1u: |
22920 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22921 | i += 1; | |
22922 | break; | |
22923 | ||
22924 | case DW_OP_const1s: | |
22925 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22926 | i += 1; | |
22927 | break; | |
22928 | ||
22929 | case DW_OP_const2u: | |
22930 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22931 | i += 2; | |
22932 | break; | |
22933 | ||
22934 | case DW_OP_const2s: | |
22935 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22936 | i += 2; | |
22937 | break; | |
d53d4ac5 | 22938 | |
21ae7a4d JK |
22939 | case DW_OP_const4u: |
22940 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22941 | i += 4; | |
22942 | break; | |
22943 | ||
22944 | case DW_OP_const4s: | |
22945 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22946 | i += 4; | |
22947 | break; | |
22948 | ||
585861ea JK |
22949 | case DW_OP_const8u: |
22950 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22951 | i += 8; | |
22952 | break; | |
22953 | ||
21ae7a4d JK |
22954 | case DW_OP_constu: |
22955 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22956 | &bytes_read); | |
22957 | i += bytes_read; | |
22958 | break; | |
22959 | ||
22960 | case DW_OP_consts: | |
22961 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22962 | i += bytes_read; | |
22963 | break; | |
22964 | ||
22965 | case DW_OP_dup: | |
22966 | stack[stacki + 1] = stack[stacki]; | |
22967 | stacki++; | |
22968 | break; | |
22969 | ||
22970 | case DW_OP_plus: | |
22971 | stack[stacki - 1] += stack[stacki]; | |
22972 | stacki--; | |
22973 | break; | |
22974 | ||
22975 | case DW_OP_plus_uconst: | |
22976 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22977 | &bytes_read); | |
22978 | i += bytes_read; | |
22979 | break; | |
22980 | ||
22981 | case DW_OP_minus: | |
22982 | stack[stacki - 1] -= stack[stacki]; | |
22983 | stacki--; | |
22984 | break; | |
22985 | ||
22986 | case DW_OP_deref: | |
22987 | /* If we're not the last op, then we definitely can't encode | |
22988 | this using GDB's address_class enum. This is valid for partial | |
22989 | global symbols, although the variable's address will be bogus | |
22990 | in the psymtab. */ | |
22991 | if (i < size) | |
22992 | dwarf2_complex_location_expr_complaint (); | |
22993 | break; | |
22994 | ||
22995 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22996 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22997 | /* The top of the stack has the offset from the beginning |
22998 | of the thread control block at which the variable is located. */ | |
22999 | /* Nothing should follow this operator, so the top of stack would | |
23000 | be returned. */ | |
23001 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23002 | address will be bogus in the psymtab. Make it always at least |
23003 | non-zero to not look as a variable garbage collected by linker | |
23004 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
23005 | if (i < size) |
23006 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 23007 | stack[stacki]++; |
21ae7a4d JK |
23008 | break; |
23009 | ||
23010 | case DW_OP_GNU_uninit: | |
23011 | break; | |
23012 | ||
336d760d | 23013 | case DW_OP_addrx: |
3019eac3 | 23014 | case DW_OP_GNU_addr_index: |
49f6c839 | 23015 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23016 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23017 | &bytes_read); | |
23018 | i += bytes_read; | |
23019 | break; | |
23020 | ||
21ae7a4d JK |
23021 | default: |
23022 | { | |
f39c6ffd | 23023 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
23024 | |
23025 | if (name) | |
b98664d3 | 23026 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
23027 | name); |
23028 | else | |
b98664d3 | 23029 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
23030 | op); |
23031 | } | |
23032 | ||
23033 | return (stack[stacki]); | |
d53d4ac5 | 23034 | } |
3c6e0cb3 | 23035 | |
21ae7a4d JK |
23036 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
23037 | outside of the allocated space. Also enforce minimum>0. */ | |
23038 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
23039 | { | |
b98664d3 | 23040 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
23041 | return 0; |
23042 | } | |
23043 | ||
23044 | if (stacki <= 0) | |
23045 | { | |
b98664d3 | 23046 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
23047 | return 0; |
23048 | } | |
23049 | } | |
23050 | return (stack[stacki]); | |
c906108c SS |
23051 | } |
23052 | ||
23053 | /* memory allocation interface */ | |
23054 | ||
c906108c | 23055 | static struct dwarf_block * |
7b5a2f43 | 23056 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23057 | { |
8d749320 | 23058 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23059 | } |
23060 | ||
c906108c | 23061 | static struct die_info * |
b60c80d6 | 23062 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23063 | { |
23064 | struct die_info *die; | |
b60c80d6 DJ |
23065 | size_t size = sizeof (struct die_info); |
23066 | ||
23067 | if (num_attrs > 1) | |
23068 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23069 | |
b60c80d6 | 23070 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23071 | memset (die, 0, sizeof (struct die_info)); |
23072 | return (die); | |
23073 | } | |
2e276125 JB |
23074 | |
23075 | \f | |
23076 | /* Macro support. */ | |
23077 | ||
2e276125 | 23078 | static struct macro_source_file * |
804d2729 TT |
23079 | macro_start_file (struct dwarf2_cu *cu, |
23080 | int file, int line, | |
2e276125 | 23081 | struct macro_source_file *current_file, |
43f3e411 | 23082 | struct line_header *lh) |
2e276125 | 23083 | { |
233d95b5 | 23084 | /* File name relative to the compilation directory of this source file. */ |
03075812 | 23085 | gdb::unique_xmalloc_ptr<char> file_name = lh->file_file_name (file); |
2e276125 | 23086 | |
2e276125 | 23087 | if (! current_file) |
abc9d0dc | 23088 | { |
fc474241 DE |
23089 | /* Note: We don't create a macro table for this compilation unit |
23090 | at all until we actually get a filename. */ | |
c24bdb02 | 23091 | struct macro_table *macro_table = cu->get_builder ()->get_macro_table (); |
fc474241 | 23092 | |
abc9d0dc TT |
23093 | /* If we have no current file, then this must be the start_file |
23094 | directive for the compilation unit's main source file. */ | |
03075812 | 23095 | current_file = macro_set_main (macro_table, file_name.get ()); |
fc474241 | 23096 | macro_define_special (macro_table); |
abc9d0dc | 23097 | } |
2e276125 | 23098 | else |
03075812 | 23099 | current_file = macro_include (current_file, line, file_name.get ()); |
6e70227d | 23100 | |
2e276125 JB |
23101 | return current_file; |
23102 | } | |
23103 | ||
2e276125 JB |
23104 | static const char * |
23105 | consume_improper_spaces (const char *p, const char *body) | |
23106 | { | |
23107 | if (*p == ' ') | |
23108 | { | |
b98664d3 | 23109 | complaint (_("macro definition contains spaces " |
3e43a32a | 23110 | "in formal argument list:\n`%s'"), |
4d3c2250 | 23111 | body); |
2e276125 JB |
23112 | |
23113 | while (*p == ' ') | |
23114 | p++; | |
23115 | } | |
23116 | ||
23117 | return p; | |
23118 | } | |
23119 | ||
23120 | ||
23121 | static void | |
23122 | parse_macro_definition (struct macro_source_file *file, int line, | |
23123 | const char *body) | |
23124 | { | |
23125 | const char *p; | |
23126 | ||
23127 | /* The body string takes one of two forms. For object-like macro | |
23128 | definitions, it should be: | |
23129 | ||
23130 | <macro name> " " <definition> | |
23131 | ||
23132 | For function-like macro definitions, it should be: | |
23133 | ||
23134 | <macro name> "() " <definition> | |
23135 | or | |
23136 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
23137 | ||
23138 | Spaces may appear only where explicitly indicated, and in the | |
23139 | <definition>. | |
23140 | ||
23141 | The Dwarf 2 spec says that an object-like macro's name is always | |
23142 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 23143 | the space when the macro's definition is the empty string. |
2e276125 JB |
23144 | |
23145 | The Dwarf 2 spec says that there should be no spaces between the | |
23146 | formal arguments in a function-like macro's formal argument list, | |
23147 | but versions of GCC around March 2002 include spaces after the | |
23148 | commas. */ | |
23149 | ||
23150 | ||
23151 | /* Find the extent of the macro name. The macro name is terminated | |
23152 | by either a space or null character (for an object-like macro) or | |
23153 | an opening paren (for a function-like macro). */ | |
23154 | for (p = body; *p; p++) | |
23155 | if (*p == ' ' || *p == '(') | |
23156 | break; | |
23157 | ||
23158 | if (*p == ' ' || *p == '\0') | |
23159 | { | |
23160 | /* It's an object-like macro. */ | |
23161 | int name_len = p - body; | |
456e800a | 23162 | std::string name (body, name_len); |
2e276125 JB |
23163 | const char *replacement; |
23164 | ||
23165 | if (*p == ' ') | |
23166 | replacement = body + name_len + 1; | |
23167 | else | |
23168 | { | |
4d3c2250 | 23169 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23170 | replacement = body + name_len; |
23171 | } | |
6e70227d | 23172 | |
456e800a | 23173 | macro_define_object (file, line, name.c_str (), replacement); |
2e276125 JB |
23174 | } |
23175 | else if (*p == '(') | |
23176 | { | |
23177 | /* It's a function-like macro. */ | |
456e800a | 23178 | std::string name (body, p - body); |
2e276125 JB |
23179 | int argc = 0; |
23180 | int argv_size = 1; | |
8d749320 | 23181 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
23182 | |
23183 | p++; | |
23184 | ||
23185 | p = consume_improper_spaces (p, body); | |
23186 | ||
23187 | /* Parse the formal argument list. */ | |
23188 | while (*p && *p != ')') | |
23189 | { | |
23190 | /* Find the extent of the current argument name. */ | |
23191 | const char *arg_start = p; | |
23192 | ||
23193 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
23194 | p++; | |
23195 | ||
23196 | if (! *p || p == arg_start) | |
4d3c2250 | 23197 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23198 | else |
23199 | { | |
23200 | /* Make sure argv has room for the new argument. */ | |
23201 | if (argc >= argv_size) | |
23202 | { | |
23203 | argv_size *= 2; | |
224c3ddb | 23204 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
23205 | } |
23206 | ||
3f8a7804 | 23207 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
23208 | } |
23209 | ||
23210 | p = consume_improper_spaces (p, body); | |
23211 | ||
23212 | /* Consume the comma, if present. */ | |
23213 | if (*p == ',') | |
23214 | { | |
23215 | p++; | |
23216 | ||
23217 | p = consume_improper_spaces (p, body); | |
23218 | } | |
23219 | } | |
23220 | ||
23221 | if (*p == ')') | |
23222 | { | |
23223 | p++; | |
23224 | ||
23225 | if (*p == ' ') | |
23226 | /* Perfectly formed definition, no complaints. */ | |
456e800a | 23227 | macro_define_function (file, line, name.c_str (), |
6e70227d | 23228 | argc, (const char **) argv, |
2e276125 JB |
23229 | p + 1); |
23230 | else if (*p == '\0') | |
23231 | { | |
23232 | /* Complain, but do define it. */ | |
4d3c2250 | 23233 | dwarf2_macro_malformed_definition_complaint (body); |
456e800a | 23234 | macro_define_function (file, line, name.c_str (), |
6e70227d | 23235 | argc, (const char **) argv, |
2e276125 JB |
23236 | p); |
23237 | } | |
23238 | else | |
23239 | /* Just complain. */ | |
4d3c2250 | 23240 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23241 | } |
23242 | else | |
23243 | /* Just complain. */ | |
4d3c2250 | 23244 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 23245 | |
2e276125 JB |
23246 | { |
23247 | int i; | |
23248 | ||
23249 | for (i = 0; i < argc; i++) | |
23250 | xfree (argv[i]); | |
23251 | } | |
23252 | xfree (argv); | |
23253 | } | |
23254 | else | |
4d3c2250 | 23255 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
23256 | } |
23257 | ||
cf2c3c16 TT |
23258 | /* Skip some bytes from BYTES according to the form given in FORM. |
23259 | Returns the new pointer. */ | |
2e276125 | 23260 | |
d521ce57 TT |
23261 | static const gdb_byte * |
23262 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
23263 | enum dwarf_form form, |
23264 | unsigned int offset_size, | |
23265 | struct dwarf2_section_info *section) | |
2e276125 | 23266 | { |
cf2c3c16 | 23267 | unsigned int bytes_read; |
2e276125 | 23268 | |
cf2c3c16 | 23269 | switch (form) |
2e276125 | 23270 | { |
cf2c3c16 TT |
23271 | case DW_FORM_data1: |
23272 | case DW_FORM_flag: | |
23273 | ++bytes; | |
23274 | break; | |
23275 | ||
23276 | case DW_FORM_data2: | |
23277 | bytes += 2; | |
23278 | break; | |
23279 | ||
23280 | case DW_FORM_data4: | |
23281 | bytes += 4; | |
23282 | break; | |
23283 | ||
23284 | case DW_FORM_data8: | |
23285 | bytes += 8; | |
23286 | break; | |
23287 | ||
0224619f JK |
23288 | case DW_FORM_data16: |
23289 | bytes += 16; | |
23290 | break; | |
23291 | ||
cf2c3c16 TT |
23292 | case DW_FORM_string: |
23293 | read_direct_string (abfd, bytes, &bytes_read); | |
23294 | bytes += bytes_read; | |
23295 | break; | |
23296 | ||
23297 | case DW_FORM_sec_offset: | |
23298 | case DW_FORM_strp: | |
36586728 | 23299 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
23300 | bytes += offset_size; |
23301 | break; | |
23302 | ||
23303 | case DW_FORM_block: | |
23304 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
23305 | bytes += bytes_read; | |
23306 | break; | |
23307 | ||
23308 | case DW_FORM_block1: | |
23309 | bytes += 1 + read_1_byte (abfd, bytes); | |
23310 | break; | |
23311 | case DW_FORM_block2: | |
23312 | bytes += 2 + read_2_bytes (abfd, bytes); | |
23313 | break; | |
23314 | case DW_FORM_block4: | |
23315 | bytes += 4 + read_4_bytes (abfd, bytes); | |
23316 | break; | |
23317 | ||
336d760d | 23318 | case DW_FORM_addrx: |
cf2c3c16 | 23319 | case DW_FORM_sdata: |
cf532bd1 | 23320 | case DW_FORM_strx: |
cf2c3c16 | 23321 | case DW_FORM_udata: |
3019eac3 DE |
23322 | case DW_FORM_GNU_addr_index: |
23323 | case DW_FORM_GNU_str_index: | |
d521ce57 | 23324 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
23325 | if (bytes == NULL) |
23326 | { | |
23327 | dwarf2_section_buffer_overflow_complaint (section); | |
23328 | return NULL; | |
23329 | } | |
cf2c3c16 TT |
23330 | break; |
23331 | ||
663c44ac JK |
23332 | case DW_FORM_implicit_const: |
23333 | break; | |
23334 | ||
cf2c3c16 TT |
23335 | default: |
23336 | { | |
b98664d3 | 23337 | complaint (_("invalid form 0x%x in `%s'"), |
96b79293 | 23338 | form, section->get_name ()); |
cf2c3c16 TT |
23339 | return NULL; |
23340 | } | |
2e276125 JB |
23341 | } |
23342 | ||
cf2c3c16 TT |
23343 | return bytes; |
23344 | } | |
757a13d0 | 23345 | |
cf2c3c16 TT |
23346 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
23347 | opcode. Returns an updated pointer to the macro data buffer; or, | |
23348 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 23349 | |
d521ce57 | 23350 | static const gdb_byte * |
cf2c3c16 | 23351 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
23352 | const gdb_byte **opcode_definitions, |
23353 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
23354 | bfd *abfd, |
23355 | unsigned int offset_size, | |
23356 | struct dwarf2_section_info *section) | |
23357 | { | |
23358 | unsigned int bytes_read, i; | |
23359 | unsigned long arg; | |
d521ce57 | 23360 | const gdb_byte *defn; |
2e276125 | 23361 | |
cf2c3c16 | 23362 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 23363 | { |
b98664d3 | 23364 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
23365 | opcode); |
23366 | return NULL; | |
23367 | } | |
2e276125 | 23368 | |
cf2c3c16 TT |
23369 | defn = opcode_definitions[opcode]; |
23370 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
23371 | defn += bytes_read; | |
2e276125 | 23372 | |
cf2c3c16 TT |
23373 | for (i = 0; i < arg; ++i) |
23374 | { | |
aead7601 SM |
23375 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
23376 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 23377 | section); |
cf2c3c16 TT |
23378 | if (mac_ptr == NULL) |
23379 | { | |
23380 | /* skip_form_bytes already issued the complaint. */ | |
23381 | return NULL; | |
23382 | } | |
23383 | } | |
757a13d0 | 23384 | |
cf2c3c16 TT |
23385 | return mac_ptr; |
23386 | } | |
757a13d0 | 23387 | |
cf2c3c16 TT |
23388 | /* A helper function which parses the header of a macro section. |
23389 | If the macro section is the extended (for now called "GNU") type, | |
23390 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
23391 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 23392 | |
d521ce57 TT |
23393 | static const gdb_byte * |
23394 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 23395 | bfd *abfd, |
d521ce57 | 23396 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
23397 | unsigned int *offset_size, |
23398 | int section_is_gnu) | |
23399 | { | |
23400 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 23401 | |
cf2c3c16 TT |
23402 | if (section_is_gnu) |
23403 | { | |
23404 | unsigned int version, flags; | |
757a13d0 | 23405 | |
cf2c3c16 | 23406 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 23407 | if (version != 4 && version != 5) |
cf2c3c16 | 23408 | { |
b98664d3 | 23409 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
23410 | version); |
23411 | return NULL; | |
23412 | } | |
23413 | mac_ptr += 2; | |
757a13d0 | 23414 | |
cf2c3c16 TT |
23415 | flags = read_1_byte (abfd, mac_ptr); |
23416 | ++mac_ptr; | |
23417 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 23418 | |
cf2c3c16 TT |
23419 | if ((flags & 2) != 0) |
23420 | /* We don't need the line table offset. */ | |
23421 | mac_ptr += *offset_size; | |
757a13d0 | 23422 | |
cf2c3c16 TT |
23423 | /* Vendor opcode descriptions. */ |
23424 | if ((flags & 4) != 0) | |
23425 | { | |
23426 | unsigned int i, count; | |
757a13d0 | 23427 | |
cf2c3c16 TT |
23428 | count = read_1_byte (abfd, mac_ptr); |
23429 | ++mac_ptr; | |
23430 | for (i = 0; i < count; ++i) | |
23431 | { | |
23432 | unsigned int opcode, bytes_read; | |
23433 | unsigned long arg; | |
23434 | ||
23435 | opcode = read_1_byte (abfd, mac_ptr); | |
23436 | ++mac_ptr; | |
23437 | opcode_definitions[opcode] = mac_ptr; | |
23438 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23439 | mac_ptr += bytes_read; | |
23440 | mac_ptr += arg; | |
23441 | } | |
757a13d0 | 23442 | } |
cf2c3c16 | 23443 | } |
757a13d0 | 23444 | |
cf2c3c16 TT |
23445 | return mac_ptr; |
23446 | } | |
757a13d0 | 23447 | |
cf2c3c16 | 23448 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 23449 | including DW_MACRO_import. */ |
cf2c3c16 TT |
23450 | |
23451 | static void | |
804d2729 | 23452 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 23453 | bfd *abfd, |
d521ce57 | 23454 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 23455 | struct macro_source_file *current_file, |
43f3e411 | 23456 | struct line_header *lh, |
cf2c3c16 | 23457 | struct dwarf2_section_info *section, |
36586728 | 23458 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 23459 | unsigned int offset_size, |
8fc3fc34 | 23460 | htab_t include_hash) |
cf2c3c16 | 23461 | { |
804d2729 TT |
23462 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23463 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 23464 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
23465 | enum dwarf_macro_record_type macinfo_type; |
23466 | int at_commandline; | |
d521ce57 | 23467 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 23468 | |
cf2c3c16 TT |
23469 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
23470 | &offset_size, section_is_gnu); | |
23471 | if (mac_ptr == NULL) | |
23472 | { | |
23473 | /* We already issued a complaint. */ | |
23474 | return; | |
23475 | } | |
757a13d0 JK |
23476 | |
23477 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
23478 | GDB is still reading the definitions from command line. First | |
23479 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
23480 | to create CURRENT_FILE for the main source holding also the command line | |
23481 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
23482 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
23483 | ||
23484 | at_commandline = 1; | |
23485 | ||
23486 | do | |
23487 | { | |
23488 | /* Do we at least have room for a macinfo type byte? */ | |
23489 | if (mac_ptr >= mac_end) | |
23490 | { | |
f664829e | 23491 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
23492 | break; |
23493 | } | |
23494 | ||
aead7601 | 23495 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
23496 | mac_ptr++; |
23497 | ||
cf2c3c16 TT |
23498 | /* Note that we rely on the fact that the corresponding GNU and |
23499 | DWARF constants are the same. */ | |
132448f8 SM |
23500 | DIAGNOSTIC_PUSH |
23501 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
23502 | switch (macinfo_type) |
23503 | { | |
23504 | /* A zero macinfo type indicates the end of the macro | |
23505 | information. */ | |
23506 | case 0: | |
23507 | break; | |
2e276125 | 23508 | |
0af92d60 JK |
23509 | case DW_MACRO_define: |
23510 | case DW_MACRO_undef: | |
23511 | case DW_MACRO_define_strp: | |
23512 | case DW_MACRO_undef_strp: | |
23513 | case DW_MACRO_define_sup: | |
23514 | case DW_MACRO_undef_sup: | |
2e276125 | 23515 | { |
891d2f0b | 23516 | unsigned int bytes_read; |
2e276125 | 23517 | int line; |
d521ce57 | 23518 | const char *body; |
cf2c3c16 | 23519 | int is_define; |
2e276125 | 23520 | |
cf2c3c16 TT |
23521 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
23522 | mac_ptr += bytes_read; | |
23523 | ||
0af92d60 JK |
23524 | if (macinfo_type == DW_MACRO_define |
23525 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
23526 | { |
23527 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
23528 | mac_ptr += bytes_read; | |
23529 | } | |
23530 | else | |
23531 | { | |
23532 | LONGEST str_offset; | |
23533 | ||
24aa364d | 23534 | str_offset = read_offset (abfd, mac_ptr, offset_size); |
cf2c3c16 | 23535 | mac_ptr += offset_size; |
2e276125 | 23536 | |
0af92d60 JK |
23537 | if (macinfo_type == DW_MACRO_define_sup |
23538 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 23539 | || section_is_dwz) |
36586728 | 23540 | { |
ed2dc618 SM |
23541 | struct dwz_file *dwz |
23542 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 23543 | |
ed2dc618 SM |
23544 | body = read_indirect_string_from_dwz (objfile, |
23545 | dwz, str_offset); | |
36586728 TT |
23546 | } |
23547 | else | |
ed2dc618 SM |
23548 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
23549 | abfd, str_offset); | |
cf2c3c16 TT |
23550 | } |
23551 | ||
0af92d60 JK |
23552 | is_define = (macinfo_type == DW_MACRO_define |
23553 | || macinfo_type == DW_MACRO_define_strp | |
23554 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 23555 | if (! current_file) |
757a13d0 JK |
23556 | { |
23557 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 23558 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 23559 | "on line %d: %s"), |
cf2c3c16 TT |
23560 | is_define ? _("definition") : _("undefinition"), |
23561 | line, body); | |
757a13d0 JK |
23562 | break; |
23563 | } | |
3e43a32a MS |
23564 | if ((line == 0 && !at_commandline) |
23565 | || (line != 0 && at_commandline)) | |
b98664d3 | 23566 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 23567 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 23568 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
23569 | line == 0 ? _("zero") : _("non-zero"), line, body); |
23570 | ||
955b06fa | 23571 | if (body == NULL) |
7bede828 | 23572 | { |
955b06fa SDJ |
23573 | /* Fedora's rpm-build's "debugedit" binary |
23574 | corrupted .debug_macro sections. | |
23575 | ||
23576 | For more info, see | |
23577 | https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */ | |
23578 | complaint (_("debug info gives %s invalid macro %s " | |
23579 | "without body (corrupted?) at line %d " | |
23580 | "on file %s"), | |
23581 | at_commandline ? _("command-line") : _("in-file"), | |
23582 | is_define ? _("definition") : _("undefinition"), | |
23583 | line, current_file->filename); | |
7bede828 | 23584 | } |
955b06fa SDJ |
23585 | else if (is_define) |
23586 | parse_macro_definition (current_file, line, body); | |
cf2c3c16 TT |
23587 | else |
23588 | { | |
0af92d60 JK |
23589 | gdb_assert (macinfo_type == DW_MACRO_undef |
23590 | || macinfo_type == DW_MACRO_undef_strp | |
23591 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
23592 | macro_undef (current_file, line, body); |
23593 | } | |
2e276125 JB |
23594 | } |
23595 | break; | |
23596 | ||
0af92d60 | 23597 | case DW_MACRO_start_file: |
2e276125 | 23598 | { |
891d2f0b | 23599 | unsigned int bytes_read; |
2e276125 JB |
23600 | int line, file; |
23601 | ||
23602 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23603 | mac_ptr += bytes_read; | |
23604 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23605 | mac_ptr += bytes_read; | |
23606 | ||
3e43a32a MS |
23607 | if ((line == 0 && !at_commandline) |
23608 | || (line != 0 && at_commandline)) | |
b98664d3 | 23609 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
23610 | "from %s at %s line %d"), |
23611 | file, at_commandline ? _("command-line") : _("file"), | |
23612 | line == 0 ? _("zero") : _("non-zero"), line); | |
23613 | ||
23614 | if (at_commandline) | |
23615 | { | |
0af92d60 | 23616 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 23617 | pass one. */ |
757a13d0 JK |
23618 | at_commandline = 0; |
23619 | } | |
23620 | else | |
804d2729 TT |
23621 | current_file = macro_start_file (cu, file, line, current_file, |
23622 | lh); | |
2e276125 JB |
23623 | } |
23624 | break; | |
23625 | ||
0af92d60 | 23626 | case DW_MACRO_end_file: |
2e276125 | 23627 | if (! current_file) |
b98664d3 | 23628 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 23629 | "`close_file' directive")); |
2e276125 JB |
23630 | else |
23631 | { | |
23632 | current_file = current_file->included_by; | |
23633 | if (! current_file) | |
23634 | { | |
cf2c3c16 | 23635 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
23636 | |
23637 | /* GCC circa March 2002 doesn't produce the zero | |
23638 | type byte marking the end of the compilation | |
23639 | unit. Complain if it's not there, but exit no | |
23640 | matter what. */ | |
23641 | ||
23642 | /* Do we at least have room for a macinfo type byte? */ | |
23643 | if (mac_ptr >= mac_end) | |
23644 | { | |
f664829e | 23645 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
23646 | return; |
23647 | } | |
23648 | ||
23649 | /* We don't increment mac_ptr here, so this is just | |
23650 | a look-ahead. */ | |
aead7601 SM |
23651 | next_type |
23652 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
23653 | mac_ptr); | |
2e276125 | 23654 | if (next_type != 0) |
b98664d3 | 23655 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 23656 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
23657 | |
23658 | return; | |
23659 | } | |
23660 | } | |
23661 | break; | |
23662 | ||
0af92d60 JK |
23663 | case DW_MACRO_import: |
23664 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
23665 | { |
23666 | LONGEST offset; | |
8fc3fc34 | 23667 | void **slot; |
a036ba48 TT |
23668 | bfd *include_bfd = abfd; |
23669 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 23670 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 23671 | int is_dwz = section_is_dwz; |
d521ce57 | 23672 | const gdb_byte *new_mac_ptr; |
cf2c3c16 | 23673 | |
24aa364d | 23674 | offset = read_offset (abfd, mac_ptr, offset_size); |
cf2c3c16 TT |
23675 | mac_ptr += offset_size; |
23676 | ||
0af92d60 | 23677 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 23678 | { |
ed2dc618 | 23679 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 23680 | |
96b79293 | 23681 | dwz->macro.read (objfile); |
a036ba48 | 23682 | |
a036ba48 | 23683 | include_section = &dwz->macro; |
96b79293 | 23684 | include_bfd = include_section->get_bfd_owner (); |
a036ba48 TT |
23685 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
23686 | is_dwz = 1; | |
23687 | } | |
23688 | ||
23689 | new_mac_ptr = include_section->buffer + offset; | |
23690 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
23691 | ||
8fc3fc34 TT |
23692 | if (*slot != NULL) |
23693 | { | |
23694 | /* This has actually happened; see | |
23695 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 23696 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
23697 | ".debug_macro section")); |
23698 | } | |
23699 | else | |
23700 | { | |
d521ce57 | 23701 | *slot = (void *) new_mac_ptr; |
36586728 | 23702 | |
804d2729 | 23703 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 23704 | include_mac_end, current_file, lh, |
36586728 | 23705 | section, section_is_gnu, is_dwz, |
4d663531 | 23706 | offset_size, include_hash); |
8fc3fc34 | 23707 | |
d521ce57 | 23708 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 23709 | } |
cf2c3c16 TT |
23710 | } |
23711 | break; | |
23712 | ||
2e276125 | 23713 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
23714 | if (!section_is_gnu) |
23715 | { | |
23716 | unsigned int bytes_read; | |
2e276125 | 23717 | |
ac298888 TT |
23718 | /* This reads the constant, but since we don't recognize |
23719 | any vendor extensions, we ignore it. */ | |
23720 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
23721 | mac_ptr += bytes_read; |
23722 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23723 | mac_ptr += bytes_read; | |
2e276125 | 23724 | |
cf2c3c16 TT |
23725 | /* We don't recognize any vendor extensions. */ |
23726 | break; | |
23727 | } | |
23728 | /* FALLTHROUGH */ | |
23729 | ||
23730 | default: | |
23731 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23732 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23733 | section); |
23734 | if (mac_ptr == NULL) | |
23735 | return; | |
23736 | break; | |
2e276125 | 23737 | } |
132448f8 | 23738 | DIAGNOSTIC_POP |
757a13d0 | 23739 | } while (macinfo_type != 0); |
2e276125 | 23740 | } |
8e19ed76 | 23741 | |
cf2c3c16 | 23742 | static void |
09262596 | 23743 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 23744 | int section_is_gnu) |
cf2c3c16 | 23745 | { |
518817b3 SM |
23746 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23747 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 23748 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
23749 | struct line_header *lh = cu->line_header; |
23750 | bfd *abfd; | |
d521ce57 | 23751 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
23752 | struct macro_source_file *current_file = 0; |
23753 | enum dwarf_macro_record_type macinfo_type; | |
23754 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 23755 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 23756 | void **slot; |
09262596 DE |
23757 | struct dwarf2_section_info *section; |
23758 | const char *section_name; | |
23759 | ||
23760 | if (cu->dwo_unit != NULL) | |
23761 | { | |
23762 | if (section_is_gnu) | |
23763 | { | |
23764 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23765 | section_name = ".debug_macro.dwo"; | |
23766 | } | |
23767 | else | |
23768 | { | |
23769 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23770 | section_name = ".debug_macinfo.dwo"; | |
23771 | } | |
23772 | } | |
23773 | else | |
23774 | { | |
23775 | if (section_is_gnu) | |
23776 | { | |
23777 | section = &dwarf2_per_objfile->macro; | |
23778 | section_name = ".debug_macro"; | |
23779 | } | |
23780 | else | |
23781 | { | |
23782 | section = &dwarf2_per_objfile->macinfo; | |
23783 | section_name = ".debug_macinfo"; | |
23784 | } | |
23785 | } | |
cf2c3c16 | 23786 | |
96b79293 | 23787 | section->read (objfile); |
cf2c3c16 TT |
23788 | if (section->buffer == NULL) |
23789 | { | |
b98664d3 | 23790 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
23791 | return; |
23792 | } | |
96b79293 | 23793 | abfd = section->get_bfd_owner (); |
cf2c3c16 TT |
23794 | |
23795 | /* First pass: Find the name of the base filename. | |
23796 | This filename is needed in order to process all macros whose definition | |
23797 | (or undefinition) comes from the command line. These macros are defined | |
23798 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
23799 | associated to the base file. | |
23800 | ||
23801 | To determine the base file name, we scan the macro definitions until we | |
23802 | reach the first DW_MACINFO_start_file entry. We then initialize | |
23803 | CURRENT_FILE accordingly so that any macro definition found before the | |
23804 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
23805 | ||
23806 | mac_ptr = section->buffer + offset; | |
23807 | mac_end = section->buffer + section->size; | |
23808 | ||
23809 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
23810 | &offset_size, section_is_gnu); | |
23811 | if (mac_ptr == NULL) | |
23812 | { | |
23813 | /* We already issued a complaint. */ | |
23814 | return; | |
23815 | } | |
23816 | ||
23817 | do | |
23818 | { | |
23819 | /* Do we at least have room for a macinfo type byte? */ | |
23820 | if (mac_ptr >= mac_end) | |
23821 | { | |
23822 | /* Complaint is printed during the second pass as GDB will probably | |
23823 | stop the first pass earlier upon finding | |
23824 | DW_MACINFO_start_file. */ | |
23825 | break; | |
23826 | } | |
23827 | ||
aead7601 | 23828 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
23829 | mac_ptr++; |
23830 | ||
23831 | /* Note that we rely on the fact that the corresponding GNU and | |
23832 | DWARF constants are the same. */ | |
132448f8 SM |
23833 | DIAGNOSTIC_PUSH |
23834 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
23835 | switch (macinfo_type) |
23836 | { | |
23837 | /* A zero macinfo type indicates the end of the macro | |
23838 | information. */ | |
23839 | case 0: | |
23840 | break; | |
23841 | ||
0af92d60 JK |
23842 | case DW_MACRO_define: |
23843 | case DW_MACRO_undef: | |
cf2c3c16 TT |
23844 | /* Only skip the data by MAC_PTR. */ |
23845 | { | |
23846 | unsigned int bytes_read; | |
23847 | ||
23848 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23849 | mac_ptr += bytes_read; | |
23850 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23851 | mac_ptr += bytes_read; | |
23852 | } | |
23853 | break; | |
23854 | ||
0af92d60 | 23855 | case DW_MACRO_start_file: |
cf2c3c16 TT |
23856 | { |
23857 | unsigned int bytes_read; | |
23858 | int line, file; | |
23859 | ||
23860 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23861 | mac_ptr += bytes_read; | |
23862 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23863 | mac_ptr += bytes_read; | |
23864 | ||
804d2729 | 23865 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
23866 | } |
23867 | break; | |
23868 | ||
0af92d60 | 23869 | case DW_MACRO_end_file: |
cf2c3c16 TT |
23870 | /* No data to skip by MAC_PTR. */ |
23871 | break; | |
23872 | ||
0af92d60 JK |
23873 | case DW_MACRO_define_strp: |
23874 | case DW_MACRO_undef_strp: | |
23875 | case DW_MACRO_define_sup: | |
23876 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
23877 | { |
23878 | unsigned int bytes_read; | |
23879 | ||
23880 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23881 | mac_ptr += bytes_read; | |
23882 | mac_ptr += offset_size; | |
23883 | } | |
23884 | break; | |
23885 | ||
0af92d60 JK |
23886 | case DW_MACRO_import: |
23887 | case DW_MACRO_import_sup: | |
cf2c3c16 | 23888 | /* Note that, according to the spec, a transparent include |
0af92d60 | 23889 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
23890 | skip this opcode. */ |
23891 | mac_ptr += offset_size; | |
23892 | break; | |
23893 | ||
23894 | case DW_MACINFO_vendor_ext: | |
23895 | /* Only skip the data by MAC_PTR. */ | |
23896 | if (!section_is_gnu) | |
23897 | { | |
23898 | unsigned int bytes_read; | |
23899 | ||
23900 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
23901 | mac_ptr += bytes_read; | |
23902 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
23903 | mac_ptr += bytes_read; | |
23904 | } | |
23905 | /* FALLTHROUGH */ | |
23906 | ||
23907 | default: | |
23908 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 23909 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
23910 | section); |
23911 | if (mac_ptr == NULL) | |
23912 | return; | |
23913 | break; | |
23914 | } | |
132448f8 | 23915 | DIAGNOSTIC_POP |
cf2c3c16 TT |
23916 | } while (macinfo_type != 0 && current_file == NULL); |
23917 | ||
23918 | /* Second pass: Process all entries. | |
23919 | ||
23920 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
23921 | command-line macro definitions/undefinitions. This flag is unset when we | |
23922 | reach the first DW_MACINFO_start_file entry. */ | |
23923 | ||
fc4007c9 TT |
23924 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
23925 | htab_eq_pointer, | |
23926 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 23927 | mac_ptr = section->buffer + offset; |
fc4007c9 | 23928 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 23929 | *slot = (void *) mac_ptr; |
804d2729 | 23930 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 23931 | current_file, lh, section, |
fc4007c9 TT |
23932 | section_is_gnu, 0, offset_size, |
23933 | include_hash.get ()); | |
cf2c3c16 TT |
23934 | } |
23935 | ||
3019eac3 DE |
23936 | /* Return the .debug_loc section to use for CU. |
23937 | For DWO files use .debug_loc.dwo. */ | |
23938 | ||
23939 | static struct dwarf2_section_info * | |
23940 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23941 | { | |
518817b3 SM |
23942 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23943 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23944 | |
3019eac3 | 23945 | if (cu->dwo_unit) |
43988095 JK |
23946 | { |
23947 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 23948 | |
43988095 JK |
23949 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
23950 | } | |
23951 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23952 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23953 | } |
23954 | ||
8cf6f0b1 TT |
23955 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23956 | ||
23957 | static void | |
23958 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23959 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23960 | const struct attribute *attr) |
8cf6f0b1 | 23961 | { |
518817b3 SM |
23962 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23963 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
23964 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23965 | ||
96b79293 | 23966 | section->read (dwarf2_per_objfile->objfile); |
8cf6f0b1 TT |
23967 | |
23968 | baton->per_cu = cu->per_cu; | |
23969 | gdb_assert (baton->per_cu); | |
23970 | /* We don't know how long the location list is, but make sure we | |
23971 | don't run off the edge of the section. */ | |
3019eac3 DE |
23972 | baton->size = section->size - DW_UNSND (attr); |
23973 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23974 | baton->base_address = cu->base_address; |
f664829e | 23975 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23976 | } |
23977 | ||
4c2df51b | 23978 | static void |
ff39bb5e | 23979 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23980 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23981 | { |
518817b3 SM |
23982 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23983 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 23984 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23985 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23986 | |
cd6c91b4 | 23987 | if (attr->form_is_section_offset () |
3019eac3 | 23988 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23989 | the section. If so, fall through to the complaint in the |
23990 | other branch. */ | |
2c7d5afc | 23991 | && DW_UNSND (attr) < section->get_size (objfile)) |
4c2df51b | 23992 | { |
0d53c4c4 | 23993 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23994 | |
8d749320 | 23995 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23996 | |
8cf6f0b1 | 23997 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23998 | |
d00adf39 | 23999 | if (cu->base_known == 0) |
b98664d3 | 24000 | complaint (_("Location list used without " |
3e43a32a | 24001 | "specifying the CU base address.")); |
4c2df51b | 24002 | |
f1e6e072 TT |
24003 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24004 | ? dwarf2_loclist_block_index | |
24005 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24006 | SYMBOL_LOCATION_BATON (sym) = baton; |
24007 | } | |
24008 | else | |
24009 | { | |
24010 | struct dwarf2_locexpr_baton *baton; | |
24011 | ||
8d749320 | 24012 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
24013 | baton->per_cu = cu->per_cu; |
24014 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 24015 | |
4fc6c0d5 | 24016 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
24017 | { |
24018 | /* Note that we're just copying the block's data pointer | |
24019 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24020 | info_buffer for SYM's objfile; right now we never release |
24021 | that buffer, but when we do clean up properly this may | |
24022 | need to change. */ | |
0d53c4c4 DJ |
24023 | baton->size = DW_BLOCK (attr)->size; |
24024 | baton->data = DW_BLOCK (attr)->data; | |
24025 | } | |
24026 | else | |
24027 | { | |
24028 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 24029 | sym->natural_name ()); |
0d53c4c4 | 24030 | baton->size = 0; |
0d53c4c4 | 24031 | } |
6e70227d | 24032 | |
f1e6e072 TT |
24033 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24034 | ? dwarf2_locexpr_block_index | |
24035 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24036 | SYMBOL_LOCATION_BATON (sym) = baton; |
24037 | } | |
4c2df51b | 24038 | } |
6502dd73 | 24039 | |
09ba997f | 24040 | /* See read.h. */ |
ae0d2f24 UW |
24041 | |
24042 | struct objfile * | |
09ba997f | 24043 | dwarf2_per_cu_data::objfile () const |
ae0d2f24 | 24044 | { |
09ba997f | 24045 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
24046 | |
24047 | /* Return the master objfile, so that we can report and look up the | |
24048 | correct file containing this variable. */ | |
24049 | if (objfile->separate_debug_objfile_backlink) | |
24050 | objfile = objfile->separate_debug_objfile_backlink; | |
24051 | ||
24052 | return objfile; | |
24053 | } | |
24054 | ||
96408a79 SA |
24055 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
24056 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
24057 | CU_HEADERP first. */ | |
24058 | ||
24059 | static const struct comp_unit_head * | |
24060 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
09ba997f | 24061 | const struct dwarf2_per_cu_data *per_cu) |
96408a79 | 24062 | { |
d521ce57 | 24063 | const gdb_byte *info_ptr; |
96408a79 SA |
24064 | |
24065 | if (per_cu->cu) | |
24066 | return &per_cu->cu->header; | |
24067 | ||
9c541725 | 24068 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
24069 | |
24070 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
24071 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
24072 | rcuh_kind::COMPILE); | |
96408a79 SA |
24073 | |
24074 | return cu_headerp; | |
24075 | } | |
24076 | ||
09ba997f | 24077 | /* See read.h. */ |
ae0d2f24 | 24078 | |
98714339 | 24079 | int |
09ba997f | 24080 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 24081 | { |
96408a79 SA |
24082 | struct comp_unit_head cu_header_local; |
24083 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 24084 | |
09ba997f | 24085 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24086 | |
24087 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
24088 | } |
24089 | ||
09ba997f | 24090 | /* See read.h. */ |
9eae7c52 TT |
24091 | |
24092 | int | |
09ba997f | 24093 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 24094 | { |
96408a79 SA |
24095 | struct comp_unit_head cu_header_local; |
24096 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 24097 | |
09ba997f | 24098 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24099 | |
24100 | return cu_headerp->offset_size; | |
24101 | } | |
24102 | ||
09ba997f | 24103 | /* See read.h. */ |
96408a79 SA |
24104 | |
24105 | int | |
09ba997f | 24106 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 SA |
24107 | { |
24108 | struct comp_unit_head cu_header_local; | |
24109 | const struct comp_unit_head *cu_headerp; | |
24110 | ||
09ba997f | 24111 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
24112 | |
24113 | if (cu_headerp->version == 2) | |
24114 | return cu_headerp->addr_size; | |
24115 | else | |
24116 | return cu_headerp->offset_size; | |
181cebd4 JK |
24117 | } |
24118 | ||
09ba997f | 24119 | /* See read.h. */ |
9aa1f1e3 TT |
24120 | |
24121 | CORE_ADDR | |
09ba997f | 24122 | dwarf2_per_cu_data::text_offset () const |
9aa1f1e3 | 24123 | { |
09ba997f TT |
24124 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
24125 | ||
24126 | return objfile->text_section_offset (); | |
9aa1f1e3 TT |
24127 | } |
24128 | ||
09ba997f TT |
24129 | /* See read.h. */ |
24130 | ||
24131 | struct type * | |
24132 | dwarf2_per_cu_data::addr_type () const | |
9a49df9d | 24133 | { |
09ba997f | 24134 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
24135 | struct type *void_type = objfile_type (objfile)->builtin_void; |
24136 | struct type *addr_type = lookup_pointer_type (void_type); | |
09ba997f | 24137 | int addr_size = this->addr_size (); |
9a49df9d AB |
24138 | |
24139 | if (TYPE_LENGTH (addr_type) == addr_size) | |
24140 | return addr_type; | |
24141 | ||
09ba997f | 24142 | addr_type = addr_sized_int_type (TYPE_UNSIGNED (addr_type)); |
9a49df9d AB |
24143 | return addr_type; |
24144 | } | |
24145 | ||
22b6cd70 TT |
24146 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
24147 | the index of the result, and that searches a vector. It will | |
24148 | return a result even if the offset in question does not actually | |
24149 | occur in any CU. This is separate so that it can be unit | |
24150 | tested. */ | |
ae038cb0 | 24151 | |
22b6cd70 TT |
24152 | static int |
24153 | dwarf2_find_containing_comp_unit | |
24154 | (sect_offset sect_off, | |
24155 | unsigned int offset_in_dwz, | |
24156 | const std::vector<dwarf2_per_cu_data *> &all_comp_units) | |
ae038cb0 | 24157 | { |
ae038cb0 DJ |
24158 | int low, high; |
24159 | ||
ae038cb0 | 24160 | low = 0; |
22b6cd70 | 24161 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
24162 | while (high > low) |
24163 | { | |
36586728 | 24164 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24165 | int mid = low + (high - low) / 2; |
9a619af0 | 24166 | |
22b6cd70 | 24167 | mid_cu = all_comp_units[mid]; |
36586728 | 24168 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 24169 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 24170 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
24171 | high = mid; |
24172 | else | |
24173 | low = mid + 1; | |
24174 | } | |
24175 | gdb_assert (low == high); | |
22b6cd70 TT |
24176 | return low; |
24177 | } | |
24178 | ||
24179 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
24180 | the DIE at OFFSET. Raises an error on failure. */ | |
24181 | ||
24182 | static struct dwarf2_per_cu_data * | |
24183 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
24184 | unsigned int offset_in_dwz, | |
24185 | struct dwarf2_per_objfile *dwarf2_per_objfile) | |
24186 | { | |
24187 | int low | |
24188 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
24189 | dwarf2_per_objfile->all_comp_units); | |
24190 | struct dwarf2_per_cu_data *this_cu | |
24191 | = dwarf2_per_objfile->all_comp_units[low]; | |
24192 | ||
45b8ae0c | 24193 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 24194 | { |
36586728 | 24195 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24196 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
24197 | "offset %s [in module %s]"), |
24198 | sect_offset_str (sect_off), | |
ed2dc618 | 24199 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 24200 | |
9c541725 PA |
24201 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
24202 | <= sect_off); | |
ae038cb0 DJ |
24203 | return dwarf2_per_objfile->all_comp_units[low-1]; |
24204 | } | |
24205 | else | |
24206 | { | |
b76e467d | 24207 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 24208 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 24209 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 24210 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
24211 | return this_cu; |
24212 | } | |
24213 | } | |
24214 | ||
22b6cd70 TT |
24215 | #if GDB_SELF_TEST |
24216 | ||
24217 | namespace selftests { | |
24218 | namespace find_containing_comp_unit { | |
24219 | ||
24220 | static void | |
24221 | run_test () | |
24222 | { | |
24223 | struct dwarf2_per_cu_data one {}; | |
24224 | struct dwarf2_per_cu_data two {}; | |
24225 | struct dwarf2_per_cu_data three {}; | |
24226 | struct dwarf2_per_cu_data four {}; | |
24227 | ||
24228 | one.length = 5; | |
24229 | two.sect_off = sect_offset (one.length); | |
24230 | two.length = 7; | |
24231 | ||
24232 | three.length = 5; | |
24233 | three.is_dwz = 1; | |
24234 | four.sect_off = sect_offset (three.length); | |
24235 | four.length = 7; | |
24236 | four.is_dwz = 1; | |
24237 | ||
24238 | std::vector<dwarf2_per_cu_data *> units; | |
24239 | units.push_back (&one); | |
24240 | units.push_back (&two); | |
24241 | units.push_back (&three); | |
24242 | units.push_back (&four); | |
24243 | ||
24244 | int result; | |
24245 | ||
24246 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
24247 | SELF_CHECK (units[result] == &one); | |
24248 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); | |
24249 | SELF_CHECK (units[result] == &one); | |
24250 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); | |
24251 | SELF_CHECK (units[result] == &two); | |
24252 | ||
24253 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
24254 | SELF_CHECK (units[result] == &three); | |
24255 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); | |
24256 | SELF_CHECK (units[result] == &three); | |
24257 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); | |
24258 | SELF_CHECK (units[result] == &four); | |
24259 | } | |
24260 | ||
24261 | } | |
24262 | } | |
24263 | ||
24264 | #endif /* GDB_SELF_TEST */ | |
24265 | ||
23745b47 | 24266 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 24267 | |
fcd3b13d SM |
24268 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
24269 | : per_cu (per_cu_), | |
9068261f AB |
24270 | mark (false), |
24271 | has_loclist (false), | |
24272 | checked_producer (false), | |
24273 | producer_is_gxx_lt_4_6 (false), | |
24274 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 24275 | producer_is_icc (false), |
9068261f | 24276 | producer_is_icc_lt_14 (false), |
c258c396 | 24277 | producer_is_codewarrior (false), |
9068261f | 24278 | processing_has_namespace_info (false) |
93311388 | 24279 | { |
fcd3b13d SM |
24280 | per_cu->cu = this; |
24281 | } | |
24282 | ||
24283 | /* Destroy a dwarf2_cu. */ | |
24284 | ||
24285 | dwarf2_cu::~dwarf2_cu () | |
24286 | { | |
24287 | per_cu->cu = NULL; | |
9816fde3 JK |
24288 | } |
24289 | ||
24290 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
24291 | ||
24292 | static void | |
95554aad TT |
24293 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24294 | enum language pretend_language) | |
9816fde3 JK |
24295 | { |
24296 | struct attribute *attr; | |
24297 | ||
24298 | /* Set the language we're debugging. */ | |
24299 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 24300 | if (attr != nullptr) |
9816fde3 JK |
24301 | set_cu_language (DW_UNSND (attr), cu); |
24302 | else | |
9cded63f | 24303 | { |
95554aad | 24304 | cu->language = pretend_language; |
9cded63f TT |
24305 | cu->language_defn = language_def (cu->language); |
24306 | } | |
dee91e82 | 24307 | |
7d45c7c3 | 24308 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24309 | } |
24310 | ||
ae038cb0 DJ |
24311 | /* Increase the age counter on each cached compilation unit, and free |
24312 | any that are too old. */ | |
24313 | ||
24314 | static void | |
ed2dc618 | 24315 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
24316 | { |
24317 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
24318 | ||
24319 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
24320 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24321 | while (per_cu != NULL) | |
24322 | { | |
24323 | per_cu->cu->last_used ++; | |
b4f54984 | 24324 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
24325 | dwarf2_mark (per_cu->cu); |
24326 | per_cu = per_cu->cu->read_in_chain; | |
24327 | } | |
24328 | ||
24329 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24330 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
24331 | while (per_cu != NULL) | |
24332 | { | |
24333 | struct dwarf2_per_cu_data *next_cu; | |
24334 | ||
24335 | next_cu = per_cu->cu->read_in_chain; | |
24336 | ||
24337 | if (!per_cu->cu->mark) | |
24338 | { | |
fcd3b13d | 24339 | delete per_cu->cu; |
ae038cb0 DJ |
24340 | *last_chain = next_cu; |
24341 | } | |
24342 | else | |
24343 | last_chain = &per_cu->cu->read_in_chain; | |
24344 | ||
24345 | per_cu = next_cu; | |
24346 | } | |
24347 | } | |
24348 | ||
24349 | /* Remove a single compilation unit from the cache. */ | |
24350 | ||
24351 | static void | |
dee91e82 | 24352 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
24353 | { |
24354 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
24355 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24356 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
24357 | |
24358 | per_cu = dwarf2_per_objfile->read_in_chain; | |
24359 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
24360 | while (per_cu != NULL) | |
24361 | { | |
24362 | struct dwarf2_per_cu_data *next_cu; | |
24363 | ||
24364 | next_cu = per_cu->cu->read_in_chain; | |
24365 | ||
dee91e82 | 24366 | if (per_cu == target_per_cu) |
ae038cb0 | 24367 | { |
fcd3b13d | 24368 | delete per_cu->cu; |
dee91e82 | 24369 | per_cu->cu = NULL; |
ae038cb0 DJ |
24370 | *last_chain = next_cu; |
24371 | break; | |
24372 | } | |
24373 | else | |
24374 | last_chain = &per_cu->cu->read_in_chain; | |
24375 | ||
24376 | per_cu = next_cu; | |
24377 | } | |
24378 | } | |
24379 | ||
dee91e82 DE |
24380 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
24381 | We store these in a hash table separate from the DIEs, and preserve them | |
24382 | when the DIEs are flushed out of cache. | |
24383 | ||
24384 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 24385 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
24386 | or the type may come from a DWO file. Furthermore, while it's more logical |
24387 | to use per_cu->section+offset, with Fission the section with the data is in | |
24388 | the DWO file but we don't know that section at the point we need it. | |
24389 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
24390 | because we can enter the lookup routine, get_die_type_at_offset, from | |
24391 | outside this file, and thus won't necessarily have PER_CU->cu. | |
24392 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 24393 | |
dee91e82 | 24394 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 24395 | { |
dee91e82 | 24396 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 24397 | sect_offset sect_off; |
1c379e20 DJ |
24398 | struct type *type; |
24399 | }; | |
24400 | ||
dee91e82 | 24401 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24402 | |
24403 | static hashval_t | |
dee91e82 | 24404 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 24405 | { |
9a3c8263 SM |
24406 | const struct dwarf2_per_cu_offset_and_type *ofs |
24407 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 24408 | |
9c541725 | 24409 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
24410 | } |
24411 | ||
dee91e82 | 24412 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24413 | |
24414 | static int | |
dee91e82 | 24415 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 24416 | { |
9a3c8263 SM |
24417 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
24418 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
24419 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
24420 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 24421 | |
dee91e82 | 24422 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 24423 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
24424 | } |
24425 | ||
24426 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
24427 | table if necessary. For convenience, return TYPE. |
24428 | ||
24429 | The DIEs reading must have careful ordering to: | |
85102364 | 24430 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
24431 | reading current DIE. |
24432 | * Not trying to dereference contents of still incompletely read in types | |
24433 | while reading in other DIEs. | |
24434 | * Enable referencing still incompletely read in types just by a pointer to | |
24435 | the type without accessing its fields. | |
24436 | ||
24437 | Therefore caller should follow these rules: | |
24438 | * Try to fetch any prerequisite types we may need to build this DIE type | |
24439 | before building the type and calling set_die_type. | |
e71ec853 | 24440 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
24441 | possible before fetching more types to complete the current type. |
24442 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 24443 | |
f792889a | 24444 | static struct type * |
1c379e20 DJ |
24445 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
24446 | { | |
518817b3 SM |
24447 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24448 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 24449 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 24450 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
24451 | struct attribute *attr; |
24452 | struct dynamic_prop prop; | |
1c379e20 | 24453 | |
b4ba55a1 JB |
24454 | /* For Ada types, make sure that the gnat-specific data is always |
24455 | initialized (if not already set). There are a few types where | |
24456 | we should not be doing so, because the type-specific area is | |
24457 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
24458 | where the type-specific area is used to store the floatformat). | |
24459 | But this is not a problem, because the gnat-specific information | |
24460 | is actually not needed for these types. */ | |
24461 | if (need_gnat_info (cu) | |
24462 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
24463 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
24464 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
24465 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
24466 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
24467 | && !HAVE_GNAT_AUX_INFO (type)) |
24468 | INIT_GNAT_SPECIFIC (type); | |
24469 | ||
3f2f83dd KB |
24470 | /* Read DW_AT_allocated and set in type. */ |
24471 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
4fc6c0d5 | 24472 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 24473 | { |
09ba997f | 24474 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 24475 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 24476 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
24477 | } |
24478 | else if (attr != NULL) | |
24479 | { | |
b98664d3 | 24480 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 24481 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 24482 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
24483 | } |
24484 | ||
24485 | /* Read DW_AT_associated and set in type. */ | |
24486 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
4fc6c0d5 | 24487 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 24488 | { |
09ba997f | 24489 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 24490 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 24491 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
24492 | } |
24493 | else if (attr != NULL) | |
24494 | { | |
b98664d3 | 24495 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 24496 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 24497 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
24498 | } |
24499 | ||
3cdcd0ce JB |
24500 | /* Read DW_AT_data_location and set in type. */ |
24501 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d | 24502 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
09ba997f | 24503 | cu->per_cu->addr_type ())) |
50a82047 | 24504 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 24505 | |
dee91e82 | 24506 | if (dwarf2_per_objfile->die_type_hash == NULL) |
0335378b TT |
24507 | dwarf2_per_objfile->die_type_hash |
24508 | = htab_up (htab_create_alloc (127, | |
24509 | per_cu_offset_and_type_hash, | |
24510 | per_cu_offset_and_type_eq, | |
24511 | NULL, xcalloc, xfree)); | |
1c379e20 | 24512 | |
dee91e82 | 24513 | ofs.per_cu = cu->per_cu; |
9c541725 | 24514 | ofs.sect_off = die->sect_off; |
1c379e20 | 24515 | ofs.type = type; |
dee91e82 | 24516 | slot = (struct dwarf2_per_cu_offset_and_type **) |
0335378b | 24517 | htab_find_slot (dwarf2_per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 24518 | if (*slot) |
b98664d3 | 24519 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 24520 | sect_offset_str (die->sect_off)); |
8d749320 SM |
24521 | *slot = XOBNEW (&objfile->objfile_obstack, |
24522 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 24523 | **slot = ofs; |
f792889a | 24524 | return type; |
1c379e20 DJ |
24525 | } |
24526 | ||
9c541725 | 24527 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24528 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24529 | |
24530 | static struct type * | |
9c541725 | 24531 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 24532 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 24533 | { |
dee91e82 | 24534 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 24535 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 24536 | |
dee91e82 | 24537 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 24538 | return NULL; |
1c379e20 | 24539 | |
dee91e82 | 24540 | ofs.per_cu = per_cu; |
9c541725 | 24541 | ofs.sect_off = sect_off; |
9a3c8263 | 24542 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
0335378b | 24543 | htab_find (dwarf2_per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
24544 | if (slot) |
24545 | return slot->type; | |
24546 | else | |
24547 | return NULL; | |
24548 | } | |
24549 | ||
02142a6c | 24550 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24551 | or return NULL if DIE does not have a saved type. */ |
24552 | ||
24553 | static struct type * | |
24554 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24555 | { | |
9c541725 | 24556 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
24557 | } |
24558 | ||
10b3939b DJ |
24559 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
24560 | ||
24561 | static void | |
24562 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
24563 | struct dwarf2_per_cu_data *ref_per_cu) | |
24564 | { | |
24565 | void **slot; | |
24566 | ||
24567 | if (cu->dependencies == NULL) | |
24568 | cu->dependencies | |
24569 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
24570 | NULL, &cu->comp_unit_obstack, | |
24571 | hashtab_obstack_allocate, | |
24572 | dummy_obstack_deallocate); | |
24573 | ||
24574 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
24575 | if (*slot == NULL) | |
24576 | *slot = ref_per_cu; | |
24577 | } | |
1c379e20 | 24578 | |
f504f079 DE |
24579 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
24580 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
24581 | cache that we must keep because we are keeping CU. */ |
24582 | ||
10b3939b DJ |
24583 | static int |
24584 | dwarf2_mark_helper (void **slot, void *data) | |
24585 | { | |
24586 | struct dwarf2_per_cu_data *per_cu; | |
24587 | ||
24588 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
24589 | |
24590 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
24591 | reading of the chain. As such dependencies remain valid it is not much | |
24592 | useful to track and undo them during QUIT cleanups. */ | |
24593 | if (per_cu->cu == NULL) | |
24594 | return 1; | |
24595 | ||
10b3939b DJ |
24596 | if (per_cu->cu->mark) |
24597 | return 1; | |
9068261f | 24598 | per_cu->cu->mark = true; |
10b3939b DJ |
24599 | |
24600 | if (per_cu->cu->dependencies != NULL) | |
24601 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
24602 | ||
24603 | return 1; | |
24604 | } | |
24605 | ||
f504f079 DE |
24606 | /* Set the mark field in CU and in every other compilation unit in the |
24607 | cache that we must keep because we are keeping CU. */ | |
24608 | ||
ae038cb0 DJ |
24609 | static void |
24610 | dwarf2_mark (struct dwarf2_cu *cu) | |
24611 | { | |
24612 | if (cu->mark) | |
24613 | return; | |
9068261f | 24614 | cu->mark = true; |
10b3939b DJ |
24615 | if (cu->dependencies != NULL) |
24616 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
24617 | } |
24618 | ||
24619 | static void | |
24620 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
24621 | { | |
24622 | while (per_cu) | |
24623 | { | |
9068261f | 24624 | per_cu->cu->mark = false; |
ae038cb0 DJ |
24625 | per_cu = per_cu->cu->read_in_chain; |
24626 | } | |
72bf9492 DJ |
24627 | } |
24628 | ||
72bf9492 DJ |
24629 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24630 | is its offset in .debug_info for this objfile. */ | |
24631 | ||
24632 | static hashval_t | |
24633 | partial_die_hash (const void *item) | |
24634 | { | |
9a3c8263 SM |
24635 | const struct partial_die_info *part_die |
24636 | = (const struct partial_die_info *) item; | |
9a619af0 | 24637 | |
9c541725 | 24638 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24639 | } |
24640 | ||
24641 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24642 | are equal if they have the same offset. */ | |
24643 | ||
24644 | static int | |
24645 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24646 | { | |
9a3c8263 SM |
24647 | const struct partial_die_info *part_die_lhs |
24648 | = (const struct partial_die_info *) item_lhs; | |
24649 | const struct partial_die_info *part_die_rhs | |
24650 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24651 | |
9c541725 | 24652 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24653 | } |
24654 | ||
3c3bb058 AB |
24655 | struct cmd_list_element *set_dwarf_cmdlist; |
24656 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
24657 | |
24658 | static void | |
981a3fb3 | 24659 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 24660 | { |
b4f54984 | 24661 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 24662 | gdb_stdout); |
ae038cb0 DJ |
24663 | } |
24664 | ||
24665 | static void | |
981a3fb3 | 24666 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 24667 | { |
b4f54984 | 24668 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
24669 | } |
24670 | ||
9291a0cd | 24671 | static void |
cd4fb1b2 SM |
24672 | show_check_physname (struct ui_file *file, int from_tty, |
24673 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 24674 | { |
cd4fb1b2 SM |
24675 | fprintf_filtered (file, |
24676 | _("Whether to check \"physname\" is %s.\n"), | |
24677 | value); | |
9291a0cd TT |
24678 | } |
24679 | ||
6c265988 | 24680 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 24681 | void |
6c265988 | 24682 | _initialize_dwarf2_read () |
9291a0cd | 24683 | { |
cd4fb1b2 SM |
24684 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24685 | Set DWARF specific variables.\n\ | |
590042fc | 24686 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
24687 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
24688 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 24689 | |
cd4fb1b2 | 24690 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
24691 | Show DWARF specific variables.\n\ |
24692 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
24693 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
24694 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 24695 | |
cd4fb1b2 SM |
24696 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
24697 | &dwarf_max_cache_age, _("\ | |
24698 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24699 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
24700 | A higher limit means that cached compilation units will be stored\n\ | |
24701 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24702 | caching, which can slow down startup."), | |
24703 | NULL, | |
24704 | show_dwarf_max_cache_age, | |
24705 | &set_dwarf_cmdlist, | |
24706 | &show_dwarf_cmdlist); | |
156942c7 | 24707 | |
cd4fb1b2 SM |
24708 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
24709 | Set debugging of the DWARF reader."), _("\ | |
24710 | Show debugging of the DWARF reader."), _("\ | |
24711 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
24712 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
24713 | information. A value greater than 1 provides more verbose information."), | |
24714 | NULL, | |
24715 | NULL, | |
24716 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24717 | |
cd4fb1b2 SM |
24718 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24719 | Set debugging of the DWARF DIE reader."), _("\ | |
24720 | Show debugging of the DWARF DIE reader."), _("\ | |
24721 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
24722 | The value is the maximum depth to print."), | |
24723 | NULL, | |
24724 | NULL, | |
24725 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24726 | |
cd4fb1b2 SM |
24727 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24728 | Set debugging of the dwarf line reader."), _("\ | |
24729 | Show debugging of the dwarf line reader."), _("\ | |
24730 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24731 | A value of 1 (one) provides basic information.\n\ | |
24732 | A value greater than 1 provides more verbose information."), | |
24733 | NULL, | |
24734 | NULL, | |
24735 | &setdebuglist, &showdebuglist); | |
437afbb8 | 24736 | |
cd4fb1b2 SM |
24737 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24738 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24739 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24740 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24741 | the demangler."), | |
24742 | NULL, show_check_physname, | |
24743 | &setdebuglist, &showdebuglist); | |
900e11f9 | 24744 | |
e615022a DE |
24745 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24746 | no_class, &use_deprecated_index_sections, _("\ | |
24747 | Set whether to use deprecated gdb_index sections."), _("\ | |
24748 | Show whether to use deprecated gdb_index sections."), _("\ | |
24749 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24750 | Normally they are ignored either because of a missing feature or\n\ | |
24751 | performance issue.\n\ | |
24752 | Warning: This option must be enabled before gdb reads the file."), | |
24753 | NULL, | |
24754 | NULL, | |
24755 | &setlist, &showlist); | |
24756 | ||
f1e6e072 TT |
24757 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
24758 | &dwarf2_locexpr_funcs); | |
24759 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24760 | &dwarf2_loclist_funcs); | |
24761 | ||
24762 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24763 | &dwarf2_block_frame_base_locexpr_funcs); | |
24764 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24765 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24766 | |
24767 | #if GDB_SELF_TEST | |
24768 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24769 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
24770 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
24771 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 24772 | #endif |
6502dd73 | 24773 | } |