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" |
9fda78b6 | 40 | #include "dwarf2/dwz.h" |
c90ec28a | 41 | #include "dwarf2/macro.h" |
c2d50fd0 | 42 | #include "dwarf2/die.h" |
2b2558bf | 43 | #include "dwarf2/stringify.h" |
4de283e4 TT |
44 | #include "bfd.h" |
45 | #include "elf-bfd.h" | |
46 | #include "symtab.h" | |
47 | #include "gdbtypes.h" | |
48 | #include "objfiles.h" | |
d55e5aa6 | 49 | #include "dwarf2.h" |
4de283e4 TT |
50 | #include "buildsym.h" |
51 | #include "demangle.h" | |
52 | #include "gdb-demangle.h" | |
4de283e4 | 53 | #include "filenames.h" /* for DOSish file names */ |
4de283e4 TT |
54 | #include "language.h" |
55 | #include "complaints.h" | |
82ca8957 TT |
56 | #include "dwarf2/expr.h" |
57 | #include "dwarf2/loc.h" | |
4de283e4 TT |
58 | #include "cp-support.h" |
59 | #include "hashtab.h" | |
60 | #include "command.h" | |
d55e5aa6 | 61 | #include "gdbcmd.h" |
4de283e4 TT |
62 | #include "block.h" |
63 | #include "addrmap.h" | |
64 | #include "typeprint.h" | |
65 | #include "psympriv.h" | |
4de283e4 | 66 | #include "c-lang.h" |
d55e5aa6 | 67 | #include "go-lang.h" |
4de283e4 TT |
68 | #include "valprint.h" |
69 | #include "gdbcore.h" /* for gnutarget */ | |
70 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
71 | #include "gdb_bfd.h" |
72 | #include "f-lang.h" | |
73 | #include "source.h" | |
4de283e4 | 74 | #include "build-id.h" |
d55e5aa6 | 75 | #include "namespace.h" |
268a13a5 TT |
76 | #include "gdbsupport/function-view.h" |
77 | #include "gdbsupport/gdb_optional.h" | |
78 | #include "gdbsupport/underlying.h" | |
268a13a5 | 79 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 80 | #include "filename-seen-cache.h" |
b32b108a | 81 | #include "producer.h" |
4de283e4 | 82 | #include <fcntl.h> |
4de283e4 | 83 | #include <algorithm> |
4de283e4 | 84 | #include <unordered_map> |
268a13a5 | 85 | #include "gdbsupport/selftest.h" |
c9317f21 | 86 | #include "rust-lang.h" |
268a13a5 | 87 | #include "gdbsupport/pathstuff.h" |
edd45eb0 | 88 | #include "count-one-bits.h" |
0d79cdc4 | 89 | #include "debuginfod-support.h" |
437afbb8 | 90 | |
73be47f5 DE |
91 | /* When == 1, print basic high level tracing messages. |
92 | When > 1, be more verbose. | |
b4f54984 DE |
93 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
94 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 95 | |
d97bc12b | 96 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 97 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 98 | |
27e0867f | 99 | /* When non-zero, dump line number entries as they are read in. */ |
8fdd972c | 100 | unsigned int dwarf_line_debug = 0; |
27e0867f | 101 | |
491144b5 CB |
102 | /* When true, cross-check physname against demangler. */ |
103 | static bool check_physname = false; | |
900e11f9 | 104 | |
491144b5 CB |
105 | /* When true, do not reject deprecated .gdb_index sections. */ |
106 | static bool use_deprecated_index_sections = false; | |
481860b3 | 107 | |
5bfd760d | 108 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 109 | |
f1e6e072 TT |
110 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
111 | ||
112 | static int dwarf2_locexpr_index; | |
113 | static int dwarf2_loclist_index; | |
114 | static int dwarf2_locexpr_block_index; | |
115 | static int dwarf2_loclist_block_index; | |
116 | ||
41144253 | 117 | /* Size of .debug_loclists section header for 32-bit DWARF format. */ |
118 | #define LOCLIST_HEADER_SIZE32 12 | |
119 | ||
120 | /* Size of .debug_loclists section header for 64-bit DWARF format. */ | |
121 | #define LOCLIST_HEADER_SIZE64 20 | |
122 | ||
3f563c84 PA |
123 | /* An index into a (C++) symbol name component in a symbol name as |
124 | recorded in the mapped_index's symbol table. For each C++ symbol | |
125 | in the symbol table, we record one entry for the start of each | |
126 | component in the symbol in a table of name components, and then | |
127 | sort the table, in order to be able to binary search symbol names, | |
128 | ignoring leading namespaces, both completion and regular look up. | |
129 | For example, for symbol "A::B::C", we'll have an entry that points | |
130 | to "A::B::C", another that points to "B::C", and another for "C". | |
131 | Note that function symbols in GDB index have no parameter | |
132 | information, just the function/method names. You can convert a | |
133 | name_component to a "const char *" using the | |
134 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
135 | ||
136 | struct name_component | |
137 | { | |
138 | /* Offset in the symbol name where the component starts. Stored as | |
139 | a (32-bit) offset instead of a pointer to save memory and improve | |
140 | locality on 64-bit architectures. */ | |
141 | offset_type name_offset; | |
142 | ||
143 | /* The symbol's index in the symbol and constant pool tables of a | |
144 | mapped_index. */ | |
145 | offset_type idx; | |
146 | }; | |
147 | ||
44ed8f3e PA |
148 | /* Base class containing bits shared by both .gdb_index and |
149 | .debug_name indexes. */ | |
150 | ||
151 | struct mapped_index_base | |
152 | { | |
22ca247e TT |
153 | mapped_index_base () = default; |
154 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
155 | ||
44ed8f3e PA |
156 | /* The name_component table (a sorted vector). See name_component's |
157 | description above. */ | |
158 | std::vector<name_component> name_components; | |
159 | ||
160 | /* How NAME_COMPONENTS is sorted. */ | |
161 | enum case_sensitivity name_components_casing; | |
162 | ||
163 | /* Return the number of names in the symbol table. */ | |
164 | virtual size_t symbol_name_count () const = 0; | |
165 | ||
166 | /* Get the name of the symbol at IDX in the symbol table. */ | |
167 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
168 | ||
169 | /* Return whether the name at IDX in the symbol table should be | |
170 | ignored. */ | |
171 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
172 | { | |
173 | return false; | |
174 | } | |
175 | ||
176 | /* Build the symbol name component sorted vector, if we haven't | |
177 | yet. */ | |
178 | void build_name_components (); | |
179 | ||
180 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
181 | possible matches for LN_NO_PARAMS in the name component | |
182 | vector. */ | |
183 | std::pair<std::vector<name_component>::const_iterator, | |
184 | std::vector<name_component>::const_iterator> | |
3b00ef10 TT |
185 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
186 | enum language lang) const; | |
44ed8f3e PA |
187 | |
188 | /* Prevent deleting/destroying via a base class pointer. */ | |
189 | protected: | |
190 | ~mapped_index_base() = default; | |
191 | }; | |
192 | ||
9291a0cd TT |
193 | /* A description of the mapped index. The file format is described in |
194 | a comment by the code that writes the index. */ | |
fc898b42 | 195 | struct mapped_index final : public mapped_index_base |
9291a0cd | 196 | { |
f00a2de2 PA |
197 | /* A slot/bucket in the symbol table hash. */ |
198 | struct symbol_table_slot | |
199 | { | |
200 | const offset_type name; | |
201 | const offset_type vec; | |
202 | }; | |
203 | ||
559a7a62 | 204 | /* Index data format version. */ |
3063847f | 205 | int version = 0; |
559a7a62 | 206 | |
f00a2de2 PA |
207 | /* The address table data. */ |
208 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 209 | |
3876f04e | 210 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 211 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 212 | |
9291a0cd | 213 | /* A pointer to the constant pool. */ |
3063847f | 214 | const char *constant_pool = nullptr; |
3f563c84 | 215 | |
44ed8f3e PA |
216 | bool symbol_name_slot_invalid (offset_type idx) const override |
217 | { | |
218 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 219 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 220 | } |
5c58de74 | 221 | |
3f563c84 PA |
222 | /* Convenience method to get at the name of the symbol at IDX in the |
223 | symbol table. */ | |
44ed8f3e | 224 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 225 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 226 | |
44ed8f3e PA |
227 | size_t symbol_name_count () const override |
228 | { return this->symbol_table.size (); } | |
9291a0cd TT |
229 | }; |
230 | ||
927aa2e7 JK |
231 | /* A description of the mapped .debug_names. |
232 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 233 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 234 | { |
ed2dc618 SM |
235 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
236 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
237 | {} | |
238 | ||
239 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
240 | bfd_endian dwarf5_byte_order; |
241 | bool dwarf5_is_dwarf64; | |
242 | bool augmentation_is_gdb; | |
243 | uint8_t offset_size; | |
244 | uint32_t cu_count = 0; | |
245 | uint32_t tu_count, bucket_count, name_count; | |
246 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
247 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
248 | const gdb_byte *name_table_string_offs_reordered; | |
249 | const gdb_byte *name_table_entry_offs_reordered; | |
250 | const gdb_byte *entry_pool; | |
251 | ||
252 | struct index_val | |
253 | { | |
254 | ULONGEST dwarf_tag; | |
255 | struct attr | |
256 | { | |
257 | /* Attribute name DW_IDX_*. */ | |
258 | ULONGEST dw_idx; | |
259 | ||
260 | /* Attribute form DW_FORM_*. */ | |
261 | ULONGEST form; | |
262 | ||
263 | /* Value if FORM is DW_FORM_implicit_const. */ | |
264 | LONGEST implicit_const; | |
265 | }; | |
266 | std::vector<attr> attr_vec; | |
267 | }; | |
268 | ||
269 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
270 | ||
271 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
272 | |
273 | /* Implementation of the mapped_index_base virtual interface, for | |
274 | the name_components cache. */ | |
275 | ||
276 | const char *symbol_name_at (offset_type idx) const override | |
277 | { return namei_to_name (idx); } | |
278 | ||
279 | size_t symbol_name_count () const override | |
280 | { return this->name_count; } | |
927aa2e7 JK |
281 | }; |
282 | ||
cd4fb1b2 | 283 | /* See dwarf2read.h. */ |
ed2dc618 | 284 | |
cd4fb1b2 | 285 | dwarf2_per_objfile * |
ed2dc618 SM |
286 | get_dwarf2_per_objfile (struct objfile *objfile) |
287 | { | |
5bfd760d | 288 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 289 | } |
c906108c | 290 | |
251d32d9 | 291 | /* Default names of the debugging sections. */ |
c906108c | 292 | |
233a11ab CS |
293 | /* Note that if the debugging section has been compressed, it might |
294 | have a name like .zdebug_info. */ | |
295 | ||
9cdd5dbd DE |
296 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
297 | { | |
251d32d9 TG |
298 | { ".debug_info", ".zdebug_info" }, |
299 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
300 | { ".debug_line", ".zdebug_line" }, | |
301 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 302 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 303 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 304 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 305 | { ".debug_str", ".zdebug_str" }, |
18a8505e | 306 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
43988095 | 307 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 308 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 309 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 310 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 311 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
312 | { ".debug_frame", ".zdebug_frame" }, |
313 | { ".eh_frame", NULL }, | |
24d3216f | 314 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
315 | { ".debug_names", ".zdebug_names" }, |
316 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 317 | 23 |
251d32d9 | 318 | }; |
c906108c | 319 | |
80626a55 | 320 | /* List of DWO/DWP sections. */ |
3019eac3 | 321 | |
80626a55 | 322 | static const struct dwop_section_names |
3019eac3 DE |
323 | { |
324 | struct dwarf2_section_names abbrev_dwo; | |
325 | struct dwarf2_section_names info_dwo; | |
326 | struct dwarf2_section_names line_dwo; | |
327 | struct dwarf2_section_names loc_dwo; | |
43988095 | 328 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
329 | struct dwarf2_section_names macinfo_dwo; |
330 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
331 | struct dwarf2_section_names str_dwo; |
332 | struct dwarf2_section_names str_offsets_dwo; | |
333 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
334 | struct dwarf2_section_names cu_index; |
335 | struct dwarf2_section_names tu_index; | |
3019eac3 | 336 | } |
80626a55 | 337 | dwop_section_names = |
3019eac3 DE |
338 | { |
339 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
340 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
341 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
342 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 343 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
344 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
345 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
346 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
347 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
348 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
349 | { ".debug_cu_index", ".zdebug_cu_index" }, |
350 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
351 | }; |
352 | ||
c906108c SS |
353 | /* local data types */ |
354 | ||
41144253 | 355 | /* The location list section (.debug_loclists) begins with a header, |
356 | which contains the following information. */ | |
357 | struct loclist_header | |
358 | { | |
359 | /* A 4-byte or 12-byte length containing the length of the | |
360 | set of entries for this compilation unit, not including the | |
361 | length field itself. */ | |
362 | unsigned int length; | |
363 | ||
364 | /* A 2-byte version identifier. */ | |
365 | short version; | |
366 | ||
367 | /* A 1-byte unsigned integer containing the size in bytes of an address on | |
368 | the target system. */ | |
369 | unsigned char addr_size; | |
370 | ||
371 | /* A 1-byte unsigned integer containing the size in bytes of a segment selector | |
372 | on the target system. */ | |
373 | unsigned char segment_collector_size; | |
374 | ||
375 | /* A 4-byte count of the number of offsets that follow the header. */ | |
376 | unsigned int offset_entry_count; | |
377 | }; | |
378 | ||
3da10d80 KS |
379 | /* Type used for delaying computation of method physnames. |
380 | See comments for compute_delayed_physnames. */ | |
381 | struct delayed_method_info | |
382 | { | |
383 | /* The type to which the method is attached, i.e., its parent class. */ | |
384 | struct type *type; | |
385 | ||
386 | /* The index of the method in the type's function fieldlists. */ | |
387 | int fnfield_index; | |
388 | ||
389 | /* The index of the method in the fieldlist. */ | |
390 | int index; | |
391 | ||
392 | /* The name of the DIE. */ | |
393 | const char *name; | |
394 | ||
395 | /* The DIE associated with this method. */ | |
396 | struct die_info *die; | |
397 | }; | |
398 | ||
e7c27a73 DJ |
399 | /* Internal state when decoding a particular compilation unit. */ |
400 | struct dwarf2_cu | |
401 | { | |
fcd3b13d SM |
402 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
403 | ~dwarf2_cu (); | |
404 | ||
405 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
406 | ||
c24bdb02 KS |
407 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
408 | Create the set of symtabs used by this TU, or if this TU is sharing | |
409 | symtabs with another TU and the symtabs have already been created | |
410 | then restore those symtabs in the line header. | |
411 | We don't need the pc/line-number mapping for type units. */ | |
412 | void setup_type_unit_groups (struct die_info *die); | |
413 | ||
414 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
415 | buildsym_compunit constructor. */ | |
416 | struct compunit_symtab *start_symtab (const char *name, | |
417 | const char *comp_dir, | |
418 | CORE_ADDR low_pc); | |
419 | ||
420 | /* Reset the builder. */ | |
421 | void reset_builder () { m_builder.reset (); } | |
422 | ||
d00adf39 | 423 | /* The header of the compilation unit. */ |
fcd3b13d | 424 | struct comp_unit_head header {}; |
e142c38c | 425 | |
d00adf39 | 426 | /* Base address of this compilation unit. */ |
2b24b6e4 | 427 | gdb::optional<CORE_ADDR> base_address; |
d00adf39 | 428 | |
e142c38c | 429 | /* The language we are debugging. */ |
fcd3b13d SM |
430 | enum language language = language_unknown; |
431 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 432 | |
fcd3b13d | 433 | const char *producer = nullptr; |
b0f35d58 | 434 | |
c24bdb02 | 435 | private: |
804d2729 TT |
436 | /* The symtab builder for this CU. This is only non-NULL when full |
437 | symbols are being read. */ | |
c24bdb02 | 438 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 439 | |
c24bdb02 | 440 | public: |
e142c38c DJ |
441 | /* The generic symbol table building routines have separate lists for |
442 | file scope symbols and all all other scopes (local scopes). So | |
443 | we need to select the right one to pass to add_symbol_to_list(). | |
444 | We do it by keeping a pointer to the correct list in list_in_scope. | |
445 | ||
446 | FIXME: The original dwarf code just treated the file scope as the | |
447 | first local scope, and all other local scopes as nested local | |
448 | scopes, and worked fine. Check to see if we really need to | |
449 | distinguish these in buildsym.c. */ | |
fcd3b13d | 450 | struct pending **list_in_scope = nullptr; |
e142c38c | 451 | |
b64f50a1 JK |
452 | /* Hash table holding all the loaded partial DIEs |
453 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 454 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
455 | |
456 | /* Storage for things with the same lifetime as this read-in compilation | |
457 | unit, including partial DIEs. */ | |
fcd3b13d | 458 | auto_obstack comp_unit_obstack; |
72bf9492 | 459 | |
ae038cb0 DJ |
460 | /* When multiple dwarf2_cu structures are living in memory, this field |
461 | chains them all together, so that they can be released efficiently. | |
462 | We will probably also want a generation counter so that most-recently-used | |
463 | compilation units are cached... */ | |
fcd3b13d | 464 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 465 | |
69d751e3 | 466 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
467 | struct dwarf2_per_cu_data *per_cu; |
468 | ||
469 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 470 | int last_used = 0; |
ae038cb0 | 471 | |
b64f50a1 JK |
472 | /* A hash table of DIE cu_offset for following references with |
473 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 474 | htab_t die_hash = nullptr; |
10b3939b DJ |
475 | |
476 | /* Full DIEs if read in. */ | |
fcd3b13d | 477 | struct die_info *dies = nullptr; |
10b3939b DJ |
478 | |
479 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
480 | units referenced by this one. Only set during full symbol processing; | |
481 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 482 | htab_t dependencies = nullptr; |
10b3939b | 483 | |
cb1df416 | 484 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 485 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
486 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
487 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
488 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
489 | to the line header as long as this DIE is being processed. See | |
490 | process_die_scope. */ | |
fcd3b13d | 491 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 492 | |
3da10d80 KS |
493 | /* A list of methods which need to have physnames computed |
494 | after all type information has been read. */ | |
c89b44cd | 495 | std::vector<delayed_method_info> method_list; |
3da10d80 | 496 | |
96408a79 | 497 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 498 | htab_t call_site_htab = nullptr; |
96408a79 | 499 | |
034e5797 DE |
500 | /* Non-NULL if this CU came from a DWO file. |
501 | There is an invariant here that is important to remember: | |
502 | Except for attributes copied from the top level DIE in the "main" | |
503 | (or "stub") file in preparation for reading the DWO file | |
18a8505e | 504 | (e.g., DW_AT_addr_base), we KISS: there is only *one* CU. |
034e5797 DE |
505 | Either there isn't a DWO file (in which case this is NULL and the point |
506 | is moot), or there is and either we're not going to read it (in which | |
507 | case this is NULL) or there is and we are reading it (in which case this | |
508 | is non-NULL). */ | |
fcd3b13d | 509 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 | 510 | |
18a8505e | 511 | /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present. |
1dbab08b | 512 | Note this value comes from the Fission stub CU/TU's DIE. */ |
18a8505e | 513 | gdb::optional<ULONGEST> addr_base; |
3019eac3 | 514 | |
18a8505e | 515 | /* The DW_AT_rnglists_base attribute if present. |
1dbab08b | 516 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 517 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
518 | be used without needing to know whether DWO files are in use or not. |
519 | N.B. This does not apply to DW_AT_ranges appearing in | |
520 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
521 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
18a8505e | 522 | DW_AT_rnglists_base *would* have to be applied, and we'd have to care |
ab435259 | 523 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ |
fcd3b13d | 524 | ULONGEST ranges_base = 0; |
2e3cf129 | 525 | |
41144253 | 526 | /* The DW_AT_loclists_base attribute if present. */ |
527 | ULONGEST loclist_base = 0; | |
528 | ||
c9317f21 TT |
529 | /* When reading debug info generated by older versions of rustc, we |
530 | have to rewrite some union types to be struct types with a | |
531 | variant part. This rewriting must be done after the CU is fully | |
532 | read in, because otherwise at the point of rewriting some struct | |
533 | type might not have been fully processed. So, we keep a list of | |
534 | all such types here and process them after expansion. */ | |
535 | std::vector<struct type *> rust_unions; | |
536 | ||
18a8505e AT |
537 | /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO |
538 | files, the value is implicitly zero. For DWARF 5 version DWO files, the | |
539 | value is often implicit and is the size of the header of | |
540 | .debug_str_offsets section (8 or 4, depending on the address size). */ | |
541 | gdb::optional<ULONGEST> str_offsets_base; | |
542 | ||
ae038cb0 | 543 | /* Mark used when releasing cached dies. */ |
9068261f | 544 | bool mark : 1; |
ae038cb0 | 545 | |
8be455d7 JK |
546 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
547 | This test is imperfect as there may exist optimized debug code not using | |
548 | any location list and still facing inlining issues if handled as | |
549 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 550 | bool has_loclist : 1; |
ba919b58 | 551 | |
9068261f | 552 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
553 | if all the producer_is_* fields are valid. This information is cached |
554 | because profiling CU expansion showed excessive time spent in | |
555 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
556 | bool checked_producer : 1; |
557 | bool producer_is_gxx_lt_4_6 : 1; | |
558 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 559 | bool producer_is_icc : 1; |
9068261f | 560 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 561 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 562 | |
9068261f | 563 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
564 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
565 | this information, but later versions do. */ | |
566 | ||
9068261f | 567 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
568 | |
569 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
570 | |
571 | /* If this CU was inherited by another CU (via specification, | |
572 | abstract_origin, etc), this is the ancestor CU. */ | |
573 | dwarf2_cu *ancestor; | |
574 | ||
575 | /* Get the buildsym_compunit for this CU. */ | |
576 | buildsym_compunit *get_builder () | |
577 | { | |
578 | /* If this CU has a builder associated with it, use that. */ | |
579 | if (m_builder != nullptr) | |
580 | return m_builder.get (); | |
581 | ||
582 | /* Otherwise, search ancestors for a valid builder. */ | |
583 | if (ancestor != nullptr) | |
584 | return ancestor->get_builder (); | |
585 | ||
586 | return nullptr; | |
587 | } | |
e7c27a73 DJ |
588 | }; |
589 | ||
094b34ac DE |
590 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
591 | This includes type_unit_group and quick_file_names. */ | |
592 | ||
593 | struct stmt_list_hash | |
594 | { | |
595 | /* The DWO unit this table is from or NULL if there is none. */ | |
596 | struct dwo_unit *dwo_unit; | |
597 | ||
598 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 599 | sect_offset line_sect_off; |
094b34ac DE |
600 | }; |
601 | ||
f4dc4d17 DE |
602 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
603 | an object of this type. */ | |
604 | ||
605 | struct type_unit_group | |
606 | { | |
0186c6a7 | 607 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
608 | To simplify things we create an artificial CU that "includes" all the |
609 | type units using this stmt_list so that the rest of the code still has | |
197400e8 | 610 | a "per_cu" handle on the symtab. */ |
094b34ac DE |
611 | struct dwarf2_per_cu_data per_cu; |
612 | ||
0186c6a7 DE |
613 | /* The TUs that share this DW_AT_stmt_list entry. |
614 | This is added to while parsing type units to build partial symtabs, | |
615 | and is deleted afterwards and not used again. */ | |
a8b3b8e9 | 616 | std::vector<signatured_type *> *tus; |
f4dc4d17 | 617 | |
43f3e411 | 618 | /* The compunit symtab. |
094b34ac | 619 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
620 | so we create an essentially anonymous symtab as the compunit symtab. */ |
621 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 622 | |
094b34ac DE |
623 | /* The data used to construct the hash key. */ |
624 | struct stmt_list_hash hash; | |
f4dc4d17 | 625 | |
f4dc4d17 DE |
626 | /* The symbol tables for this TU (obtained from the files listed in |
627 | DW_AT_stmt_list). | |
628 | WARNING: The order of entries here must match the order of entries | |
629 | in the line header. After the first TU using this type_unit_group, the | |
630 | line header for the subsequent TUs is recreated from this. This is done | |
631 | because we need to use the same symtabs for each TU using the same | |
632 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
633 | there's no guarantee the line header doesn't have duplicate entries. */ | |
634 | struct symtab **symtabs; | |
635 | }; | |
636 | ||
73869dc2 | 637 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
638 | |
639 | struct dwo_sections | |
640 | { | |
641 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
642 | struct dwarf2_section_info line; |
643 | struct dwarf2_section_info loc; | |
43988095 | 644 | struct dwarf2_section_info loclists; |
09262596 DE |
645 | struct dwarf2_section_info macinfo; |
646 | struct dwarf2_section_info macro; | |
3019eac3 DE |
647 | struct dwarf2_section_info str; |
648 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
649 | /* In the case of a virtual DWO file, these two are unused. */ |
650 | struct dwarf2_section_info info; | |
fd5866f6 | 651 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
652 | }; |
653 | ||
c88ee1f0 | 654 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
655 | |
656 | struct dwo_unit | |
657 | { | |
658 | /* Backlink to the containing struct dwo_file. */ | |
659 | struct dwo_file *dwo_file; | |
660 | ||
661 | /* The "id" that distinguishes this CU/TU. | |
662 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
663 | Since signatures came first, we stick with it for consistency. */ | |
664 | ULONGEST signature; | |
665 | ||
666 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 667 | struct dwarf2_section_info *section; |
3019eac3 | 668 | |
9c541725 PA |
669 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
670 | sect_offset sect_off; | |
3019eac3 DE |
671 | unsigned int length; |
672 | ||
673 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
674 | cu_offset type_offset_in_tu; | |
675 | }; | |
676 | ||
73869dc2 DE |
677 | /* include/dwarf2.h defines the DWP section codes. |
678 | It defines a max value but it doesn't define a min value, which we | |
679 | use for error checking, so provide one. */ | |
680 | ||
681 | enum dwp_v2_section_ids | |
682 | { | |
683 | DW_SECT_MIN = 1 | |
684 | }; | |
685 | ||
80626a55 | 686 | /* Data for one DWO file. |
57d63ce2 DE |
687 | |
688 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
689 | appears in a DWP file). DWP files don't really have DWO files per se - | |
690 | comdat folding of types "loses" the DWO file they came from, and from | |
691 | a high level view DWP files appear to contain a mass of random types. | |
692 | However, to maintain consistency with the non-DWP case we pretend DWP | |
693 | files contain virtual DWO files, and we assign each TU with one virtual | |
694 | DWO file (generally based on the line and abbrev section offsets - | |
695 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
696 | |
697 | struct dwo_file | |
698 | { | |
51ac9db5 SM |
699 | dwo_file () = default; |
700 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
701 | ||
18a8505e | 702 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
80626a55 DE |
703 | For virtual DWO files the name is constructed from the section offsets |
704 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
705 | from related CU+TUs. */ | |
51ac9db5 | 706 | const char *dwo_name = nullptr; |
0ac5b59e DE |
707 | |
708 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 709 | const char *comp_dir = nullptr; |
3019eac3 | 710 | |
80626a55 DE |
711 | /* The bfd, when the file is open. Otherwise this is NULL. |
712 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 713 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 714 | |
73869dc2 DE |
715 | /* The sections that make up this DWO file. |
716 | Remember that for virtual DWO files in DWP V2, these are virtual | |
717 | sections (for lack of a better name). */ | |
51ac9db5 | 718 | struct dwo_sections sections {}; |
3019eac3 | 719 | |
33c5cd75 DB |
720 | /* The CUs in the file. |
721 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
722 | an extension to handle LLVM's Link Time Optimization output (where | |
723 | multiple source files may be compiled into a single object/dwo pair). */ | |
b0b6a987 | 724 | htab_up cus; |
3019eac3 DE |
725 | |
726 | /* Table of TUs in the file. | |
727 | Each element is a struct dwo_unit. */ | |
b0b6a987 | 728 | htab_up tus; |
3019eac3 DE |
729 | }; |
730 | ||
80626a55 DE |
731 | /* These sections are what may appear in a DWP file. */ |
732 | ||
733 | struct dwp_sections | |
734 | { | |
73869dc2 | 735 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
736 | struct dwarf2_section_info str; |
737 | struct dwarf2_section_info cu_index; | |
738 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
739 | |
740 | /* These are only used by DWP version 2 files. | |
741 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
742 | sections are referenced by section number, and are not recorded here. | |
743 | In DWP version 2 there is at most one copy of all these sections, each | |
744 | section being (effectively) comprised of the concatenation of all of the | |
745 | individual sections that exist in the version 1 format. | |
746 | To keep the code simple we treat each of these concatenated pieces as a | |
747 | section itself (a virtual section?). */ | |
748 | struct dwarf2_section_info abbrev; | |
749 | struct dwarf2_section_info info; | |
750 | struct dwarf2_section_info line; | |
751 | struct dwarf2_section_info loc; | |
752 | struct dwarf2_section_info macinfo; | |
753 | struct dwarf2_section_info macro; | |
754 | struct dwarf2_section_info str_offsets; | |
755 | struct dwarf2_section_info types; | |
80626a55 DE |
756 | }; |
757 | ||
73869dc2 DE |
758 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
759 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 760 | |
73869dc2 | 761 | struct virtual_v1_dwo_sections |
80626a55 DE |
762 | { |
763 | struct dwarf2_section_info abbrev; | |
764 | struct dwarf2_section_info line; | |
765 | struct dwarf2_section_info loc; | |
766 | struct dwarf2_section_info macinfo; | |
767 | struct dwarf2_section_info macro; | |
768 | struct dwarf2_section_info str_offsets; | |
769 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 770 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
771 | struct dwarf2_section_info info_or_types; |
772 | }; | |
773 | ||
73869dc2 DE |
774 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
775 | In version 2, the sections of the DWO files are concatenated together | |
776 | and stored in one section of that name. Thus each ELF section contains | |
777 | several "virtual" sections. */ | |
778 | ||
779 | struct virtual_v2_dwo_sections | |
780 | { | |
781 | bfd_size_type abbrev_offset; | |
782 | bfd_size_type abbrev_size; | |
783 | ||
784 | bfd_size_type line_offset; | |
785 | bfd_size_type line_size; | |
786 | ||
787 | bfd_size_type loc_offset; | |
788 | bfd_size_type loc_size; | |
789 | ||
790 | bfd_size_type macinfo_offset; | |
791 | bfd_size_type macinfo_size; | |
792 | ||
793 | bfd_size_type macro_offset; | |
794 | bfd_size_type macro_size; | |
795 | ||
796 | bfd_size_type str_offsets_offset; | |
797 | bfd_size_type str_offsets_size; | |
798 | ||
799 | /* Each DWP hash table entry records one CU or one TU. | |
800 | That is recorded here, and copied to dwo_unit.section. */ | |
801 | bfd_size_type info_or_types_offset; | |
802 | bfd_size_type info_or_types_size; | |
803 | }; | |
804 | ||
80626a55 DE |
805 | /* Contents of DWP hash tables. */ |
806 | ||
807 | struct dwp_hash_table | |
808 | { | |
73869dc2 | 809 | uint32_t version, nr_columns; |
80626a55 | 810 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
811 | const gdb_byte *hash_table, *unit_table; |
812 | union | |
813 | { | |
814 | struct | |
815 | { | |
816 | const gdb_byte *indices; | |
817 | } v1; | |
818 | struct | |
819 | { | |
820 | /* This is indexed by column number and gives the id of the section | |
821 | in that column. */ | |
822 | #define MAX_NR_V2_DWO_SECTIONS \ | |
823 | (1 /* .debug_info or .debug_types */ \ | |
824 | + 1 /* .debug_abbrev */ \ | |
825 | + 1 /* .debug_line */ \ | |
826 | + 1 /* .debug_loc */ \ | |
827 | + 1 /* .debug_str_offsets */ \ | |
828 | + 1 /* .debug_macro or .debug_macinfo */) | |
829 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
830 | const gdb_byte *offsets; | |
831 | const gdb_byte *sizes; | |
832 | } v2; | |
833 | } section_pool; | |
80626a55 DE |
834 | }; |
835 | ||
836 | /* Data for one DWP file. */ | |
837 | ||
838 | struct dwp_file | |
839 | { | |
400174b1 TT |
840 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
841 | : name (name_), | |
842 | dbfd (std::move (abfd)) | |
843 | { | |
844 | } | |
845 | ||
80626a55 DE |
846 | /* Name of the file. */ |
847 | const char *name; | |
848 | ||
73869dc2 | 849 | /* File format version. */ |
400174b1 | 850 | int version = 0; |
73869dc2 | 851 | |
93417882 | 852 | /* The bfd. */ |
400174b1 | 853 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
854 | |
855 | /* Section info for this file. */ | |
400174b1 | 856 | struct dwp_sections sections {}; |
80626a55 | 857 | |
57d63ce2 | 858 | /* Table of CUs in the file. */ |
400174b1 | 859 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
860 | |
861 | /* Table of TUs in the file. */ | |
400174b1 | 862 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 863 | |
19ac8c2e | 864 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
48b490f2 TT |
865 | htab_up loaded_cus; |
866 | htab_up loaded_tus; | |
80626a55 | 867 | |
73869dc2 DE |
868 | /* Table to map ELF section numbers to their sections. |
869 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
870 | unsigned int num_sections = 0; |
871 | asection **elf_sections = nullptr; | |
80626a55 DE |
872 | }; |
873 | ||
0963b4bd MS |
874 | /* Struct used to pass misc. parameters to read_die_and_children, et |
875 | al. which are used for both .debug_info and .debug_types dies. | |
876 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 877 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
878 | |
879 | struct die_reader_specs | |
880 | { | |
a32a8923 | 881 | /* The bfd of die_section. */ |
93311388 DE |
882 | bfd* abfd; |
883 | ||
884 | /* The CU of the DIE we are parsing. */ | |
885 | struct dwarf2_cu *cu; | |
886 | ||
80626a55 | 887 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
888 | struct dwo_file *dwo_file; |
889 | ||
dee91e82 | 890 | /* The section the die comes from. |
3019eac3 | 891 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
892 | struct dwarf2_section_info *die_section; |
893 | ||
894 | /* die_section->buffer. */ | |
d521ce57 | 895 | const gdb_byte *buffer; |
f664829e DE |
896 | |
897 | /* The end of the buffer. */ | |
898 | const gdb_byte *buffer_end; | |
a2ce51a0 | 899 | |
685af9cd TT |
900 | /* The abbreviation table to use when reading the DIEs. */ |
901 | struct abbrev_table *abbrev_table; | |
93311388 DE |
902 | }; |
903 | ||
c0ab21c2 TT |
904 | /* A subclass of die_reader_specs that holds storage and has complex |
905 | constructor and destructor behavior. */ | |
906 | ||
907 | class cutu_reader : public die_reader_specs | |
908 | { | |
909 | public: | |
910 | ||
911 | cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
912 | struct abbrev_table *abbrev_table, | |
6751ebae | 913 | int use_existing_cu, |
c0ab21c2 TT |
914 | bool skip_partial); |
915 | ||
916 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
917 | struct dwarf2_cu *parent_cu = nullptr, | |
918 | struct dwo_file *dwo_file = nullptr); | |
919 | ||
c0ab21c2 TT |
920 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
921 | ||
922 | const gdb_byte *info_ptr = nullptr; | |
923 | struct die_info *comp_unit_die = nullptr; | |
c0ab21c2 TT |
924 | bool dummy_p = false; |
925 | ||
6751ebae TT |
926 | /* Release the new CU, putting it on the chain. This cannot be done |
927 | for dummy CUs. */ | |
928 | void keep (); | |
929 | ||
c0ab21c2 TT |
930 | private: |
931 | void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 932 | int use_existing_cu); |
c0ab21c2 TT |
933 | |
934 | struct dwarf2_per_cu_data *m_this_cu; | |
c0ab21c2 TT |
935 | std::unique_ptr<dwarf2_cu> m_new_cu; |
936 | ||
937 | /* The ordinary abbreviation table. */ | |
938 | abbrev_table_up m_abbrev_table_holder; | |
939 | ||
940 | /* The DWO abbreviation table. */ | |
941 | abbrev_table_up m_dwo_abbrev_table; | |
942 | }; | |
dee91e82 | 943 | |
c906108c | 944 | /* When we construct a partial symbol table entry we only |
0963b4bd | 945 | need this much information. */ |
6f06d47b | 946 | struct partial_die_info : public allocate_on_obstack |
c906108c | 947 | { |
6f06d47b YQ |
948 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
949 | ||
950 | /* Disable assign but still keep copy ctor, which is needed | |
951 | load_partial_dies. */ | |
952 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
953 | ||
52356b79 YQ |
954 | /* Adjust the partial die before generating a symbol for it. This |
955 | function may set the is_external flag or change the DIE's | |
956 | name. */ | |
957 | void fixup (struct dwarf2_cu *cu); | |
958 | ||
48fbe735 YQ |
959 | /* Read a minimal amount of information into the minimal die |
960 | structure. */ | |
961 | const gdb_byte *read (const struct die_reader_specs *reader, | |
962 | const struct abbrev_info &abbrev, | |
963 | const gdb_byte *info_ptr); | |
964 | ||
72bf9492 | 965 | /* Offset of this DIE. */ |
6f06d47b | 966 | const sect_offset sect_off; |
72bf9492 DJ |
967 | |
968 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 969 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 970 | |
72bf9492 | 971 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
972 | const unsigned int has_children : 1; |
973 | ||
72bf9492 DJ |
974 | unsigned int is_external : 1; |
975 | unsigned int is_declaration : 1; | |
976 | unsigned int has_type : 1; | |
977 | unsigned int has_specification : 1; | |
978 | unsigned int has_pc_info : 1; | |
481860b3 | 979 | unsigned int may_be_inlined : 1; |
72bf9492 | 980 | |
0c1b455e TT |
981 | /* This DIE has been marked DW_AT_main_subprogram. */ |
982 | unsigned int main_subprogram : 1; | |
983 | ||
72bf9492 DJ |
984 | /* Flag set if the SCOPE field of this structure has been |
985 | computed. */ | |
986 | unsigned int scope_set : 1; | |
987 | ||
fa4028e9 JB |
988 | /* Flag set if the DIE has a byte_size attribute. */ |
989 | unsigned int has_byte_size : 1; | |
990 | ||
ff908ebf AW |
991 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
992 | unsigned int has_const_value : 1; | |
993 | ||
98bfdba5 PA |
994 | /* Flag set if any of the DIE's children are template arguments. */ |
995 | unsigned int has_template_arguments : 1; | |
996 | ||
52356b79 | 997 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
998 | unsigned int fixup_called : 1; |
999 | ||
36586728 TT |
1000 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1001 | unsigned int is_dwz : 1; | |
1002 | ||
1003 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1004 | unsigned int spec_is_dwz : 1; | |
1005 | ||
72bf9492 | 1006 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1007 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 1008 | const char *name = nullptr; |
72bf9492 | 1009 | |
abc72ce4 | 1010 | /* The linkage name, if present. */ |
6f06d47b | 1011 | const char *linkage_name = nullptr; |
abc72ce4 | 1012 | |
72bf9492 DJ |
1013 | /* The scope to prepend to our children. This is generally |
1014 | allocated on the comp_unit_obstack, so will disappear | |
1015 | when this compilation unit leaves the cache. */ | |
6f06d47b | 1016 | const char *scope = nullptr; |
72bf9492 | 1017 | |
95554aad TT |
1018 | /* Some data associated with the partial DIE. The tag determines |
1019 | which field is live. */ | |
1020 | union | |
1021 | { | |
1022 | /* The location description associated with this DIE, if any. */ | |
1023 | struct dwarf_block *locdesc; | |
1024 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1025 | sect_offset sect_off; |
6f06d47b | 1026 | } d {}; |
72bf9492 DJ |
1027 | |
1028 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
1029 | CORE_ADDR lowpc = 0; |
1030 | CORE_ADDR highpc = 0; | |
72bf9492 | 1031 | |
93311388 | 1032 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1033 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1034 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1035 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1036 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1037 | |
1038 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1039 | DW_AT_specification (or DW_AT_abstract_origin or | |
1040 | DW_AT_extension). */ | |
6f06d47b | 1041 | sect_offset spec_offset {}; |
72bf9492 DJ |
1042 | |
1043 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1044 | if any. */ | |
6f06d47b YQ |
1045 | struct partial_die_info *die_parent = nullptr; |
1046 | struct partial_die_info *die_child = nullptr; | |
1047 | struct partial_die_info *die_sibling = nullptr; | |
1048 | ||
1049 | friend struct partial_die_info * | |
1050 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1051 | ||
1052 | private: | |
1053 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1054 | partial_die_info (sect_offset sect_off) | |
1055 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1056 | { | |
1057 | } | |
1058 | ||
1059 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1060 | int has_children_) | |
1061 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1062 | { | |
1063 | is_external = 0; | |
1064 | is_declaration = 0; | |
1065 | has_type = 0; | |
1066 | has_specification = 0; | |
1067 | has_pc_info = 0; | |
1068 | may_be_inlined = 0; | |
1069 | main_subprogram = 0; | |
1070 | scope_set = 0; | |
1071 | has_byte_size = 0; | |
1072 | has_const_value = 0; | |
1073 | has_template_arguments = 0; | |
1074 | fixup_called = 0; | |
1075 | is_dwz = 0; | |
1076 | spec_is_dwz = 0; | |
1077 | } | |
c906108c SS |
1078 | }; |
1079 | ||
c906108c SS |
1080 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1081 | but this would require a corresponding change in unpack_field_as_long | |
1082 | and friends. */ | |
1083 | static int bits_per_byte = 8; | |
1084 | ||
9c6a1327 TT |
1085 | struct variant_part_builder; |
1086 | ||
1087 | /* When reading a variant, we track a bit more information about the | |
1088 | field, and store it in an object of this type. */ | |
2ddeaf8a TT |
1089 | |
1090 | struct variant_field | |
1091 | { | |
9c6a1327 TT |
1092 | int first_field = -1; |
1093 | int last_field = -1; | |
1094 | ||
1095 | /* A variant can contain other variant parts. */ | |
1096 | std::vector<variant_part_builder> variant_parts; | |
1097 | ||
2ddeaf8a TT |
1098 | /* If we see a DW_TAG_variant, then this will be set if this is the |
1099 | default branch. */ | |
9c6a1327 TT |
1100 | bool default_branch = false; |
1101 | /* If we see a DW_AT_discr_value, then this will be the discriminant | |
1102 | value. */ | |
1103 | ULONGEST discriminant_value = 0; | |
1104 | /* If we see a DW_AT_discr_list, then this is a pointer to the list | |
1105 | data. */ | |
1106 | struct dwarf_block *discr_list_data = nullptr; | |
1107 | }; | |
1108 | ||
1109 | /* This represents a DW_TAG_variant_part. */ | |
1110 | ||
1111 | struct variant_part_builder | |
1112 | { | |
1113 | /* The offset of the discriminant field. */ | |
1114 | sect_offset discriminant_offset {}; | |
1115 | ||
1116 | /* Variants that are direct children of this variant part. */ | |
1117 | std::vector<variant_field> variants; | |
1118 | ||
1119 | /* True if we're currently reading a variant. */ | |
1120 | bool processing_variant = false; | |
2ddeaf8a TT |
1121 | }; |
1122 | ||
52059ffd TT |
1123 | struct nextfield |
1124 | { | |
be2daae6 TT |
1125 | int accessibility = 0; |
1126 | int virtuality = 0; | |
9c6a1327 TT |
1127 | /* Variant parts need to find the discriminant, which is a DIE |
1128 | reference. We track the section offset of each field to make | |
1129 | this link. */ | |
1130 | sect_offset offset; | |
be2daae6 | 1131 | struct field field {}; |
52059ffd TT |
1132 | }; |
1133 | ||
1134 | struct fnfieldlist | |
1135 | { | |
be2daae6 TT |
1136 | const char *name = nullptr; |
1137 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1138 | }; |
1139 | ||
c906108c SS |
1140 | /* The routines that read and process dies for a C struct or C++ class |
1141 | pass lists of data member fields and lists of member function fields | |
1142 | in an instance of a field_info structure, as defined below. */ | |
1143 | struct field_info | |
c5aa993b | 1144 | { |
0963b4bd | 1145 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1146 | std::vector<struct nextfield> fields; |
1147 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1148 | |
85102364 | 1149 | /* Set if the accessibility of one of the fields is not public. */ |
be2daae6 | 1150 | int non_public_fields = 0; |
c906108c | 1151 | |
c5aa993b JM |
1152 | /* Member function fieldlist array, contains name of possibly overloaded |
1153 | member function, number of overloaded member functions and a pointer | |
1154 | to the head of the member function field chain. */ | |
be2daae6 | 1155 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1156 | |
1157 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1158 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1159 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1160 | |
1161 | /* Nested types defined by this class and the number of elements in this | |
1162 | list. */ | |
be2daae6 | 1163 | std::vector<struct decl_field> nested_types_list; |
317f7127 | 1164 | |
9c6a1327 TT |
1165 | /* If non-null, this is the variant part we are currently |
1166 | reading. */ | |
1167 | variant_part_builder *current_variant_part = nullptr; | |
1168 | /* This holds all the top-level variant parts attached to the type | |
1169 | we're reading. */ | |
1170 | std::vector<variant_part_builder> variant_parts; | |
1171 | ||
317f7127 TT |
1172 | /* Return the total number of fields (including baseclasses). */ |
1173 | int nfields () const | |
1174 | { | |
1175 | return fields.size () + baseclasses.size (); | |
1176 | } | |
c5aa993b | 1177 | }; |
c906108c | 1178 | |
ae038cb0 DJ |
1179 | /* Loaded secondary compilation units are kept in memory until they |
1180 | have not been referenced for the processing of this many | |
1181 | compilation units. Set this to zero to disable caching. Cache | |
1182 | sizes of up to at least twenty will improve startup time for | |
1183 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1184 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1185 | static void |
b4f54984 DE |
1186 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1187 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1188 | { |
3e43a32a | 1189 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1190 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1191 | value); |
1192 | } | |
4390d890 | 1193 | \f |
c906108c SS |
1194 | /* local function prototypes */ |
1195 | ||
918dd910 JK |
1196 | static void dwarf2_find_base_address (struct die_info *die, |
1197 | struct dwarf2_cu *cu); | |
1198 | ||
891813be | 1199 | static dwarf2_psymtab *create_partial_symtab |
0018ea6f DE |
1200 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
1201 | ||
f1902523 JK |
1202 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1203 | const gdb_byte *info_ptr, | |
3e225074 | 1204 | struct die_info *type_unit_die); |
f1902523 | 1205 | |
ed2dc618 SM |
1206 | static void dwarf2_build_psymtabs_hard |
1207 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1208 | |
72bf9492 DJ |
1209 | static void scan_partial_symbols (struct partial_die_info *, |
1210 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1211 | int, struct dwarf2_cu *); |
c906108c | 1212 | |
72bf9492 DJ |
1213 | static void add_partial_symbol (struct partial_die_info *, |
1214 | struct dwarf2_cu *); | |
63d06c5c | 1215 | |
72bf9492 DJ |
1216 | static void add_partial_namespace (struct partial_die_info *pdi, |
1217 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1218 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1219 | |
5d7cb8df | 1220 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1221 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1222 | struct dwarf2_cu *cu); |
1223 | ||
72bf9492 DJ |
1224 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1225 | struct dwarf2_cu *cu); | |
91c24f0a | 1226 | |
bc30ff58 JB |
1227 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1228 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1229 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1230 | |
d521ce57 | 1231 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1232 | |
dee91e82 | 1233 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1234 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1235 | |
fb816e8b TV |
1236 | /* A pair of partial_die_info and compilation unit. */ |
1237 | struct cu_partial_die_info | |
1238 | { | |
1239 | /* The compilation unit of the partial_die_info. */ | |
1240 | struct dwarf2_cu *cu; | |
1241 | /* A partial_die_info. */ | |
1242 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1243 | |
1244 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1245 | : cu (cu), | |
1246 | pdi (pdi) | |
405feb71 | 1247 | { /* Nothing. */ } |
122cf0f2 AB |
1248 | |
1249 | private: | |
1250 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1251 | }; |
1252 | ||
122cf0f2 AB |
1253 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1254 | struct dwarf2_cu *); | |
72bf9492 | 1255 | |
d521ce57 TT |
1256 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1257 | struct attribute *, struct attr_abbrev *, | |
18a8505e AT |
1258 | const gdb_byte *, bool *need_reprocess); |
1259 | ||
1260 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
1261 | struct attribute *attr); | |
1262 | ||
1263 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1264 | |
ed2dc618 SM |
1265 | static sect_offset read_abbrev_offset |
1266 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1267 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1268 | |
ed2dc618 SM |
1269 | static const char *read_indirect_string |
1270 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1271 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1272 | |
ed2dc618 | 1273 | static const char *read_indirect_string_at_offset |
4f44ae6c | 1274 | (struct dwarf2_per_objfile *dwarf2_per_objfile, LONGEST str_offset); |
927aa2e7 | 1275 | |
d521ce57 TT |
1276 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1277 | const gdb_byte *, | |
3019eac3 DE |
1278 | unsigned int *); |
1279 | ||
18a8505e AT |
1280 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1281 | ULONGEST str_index); | |
1282 | ||
1283 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1284 | ULONGEST str_index); | |
3019eac3 | 1285 | |
e142c38c | 1286 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1287 | |
e142c38c DJ |
1288 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1289 | struct dwarf2_cu *); | |
c906108c | 1290 | |
7d45c7c3 KB |
1291 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1292 | struct dwarf2_cu *cu); | |
1293 | ||
a084a2a6 AT |
1294 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1295 | ||
05cf31d1 JB |
1296 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1297 | struct dwarf2_cu *cu); | |
1298 | ||
e142c38c | 1299 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1300 | |
e142c38c | 1301 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1302 | struct dwarf2_cu **); |
63d06c5c | 1303 | |
9c541725 | 1304 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1305 | struct dwarf2_cu *cu); |
debd256d | 1306 | |
f3f5162e | 1307 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1308 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1309 | CORE_ADDR, int decode_mapping); |
c906108c | 1310 | |
804d2729 TT |
1311 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1312 | const char *); | |
c906108c | 1313 | |
a14ed312 | 1314 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1315 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1316 | |
ff39bb5e | 1317 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1318 | struct dwarf2_cu *); |
c906108c | 1319 | |
ff39bb5e | 1320 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1321 | struct type *type, |
1322 | const char *name, | |
1323 | struct obstack *obstack, | |
12df843f | 1324 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1325 | const gdb_byte **bytes, |
98bfdba5 | 1326 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1327 | |
e7c27a73 | 1328 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1329 | |
b4ba55a1 JB |
1330 | static int need_gnat_info (struct dwarf2_cu *); |
1331 | ||
3e43a32a MS |
1332 | static struct type *die_descriptive_type (struct die_info *, |
1333 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1334 | |
1335 | static void set_descriptive_type (struct type *, struct die_info *, | |
1336 | struct dwarf2_cu *); | |
1337 | ||
e7c27a73 DJ |
1338 | static struct type *die_containing_type (struct die_info *, |
1339 | struct dwarf2_cu *); | |
c906108c | 1340 | |
ff39bb5e | 1341 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1342 | struct dwarf2_cu *); |
c906108c | 1343 | |
f792889a | 1344 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1345 | |
673bfd45 DE |
1346 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1347 | ||
0d5cff50 | 1348 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1349 | |
6e70227d | 1350 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1351 | const char *suffix, int physname, |
1352 | struct dwarf2_cu *cu); | |
63d06c5c | 1353 | |
e7c27a73 | 1354 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1355 | |
348e048f DE |
1356 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1357 | ||
e7c27a73 | 1358 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1359 | |
e7c27a73 | 1360 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1361 | |
96408a79 SA |
1362 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1363 | ||
71a3c369 TT |
1364 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1365 | ||
ff013f42 | 1366 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
891813be | 1367 | struct dwarf2_cu *, dwarf2_psymtab *); |
ff013f42 | 1368 | |
41144253 | 1369 | /* Return the .debug_loclists section to use for cu. */ |
1370 | static struct dwarf2_section_info *cu_debug_loc_section (struct dwarf2_cu *cu); | |
1371 | ||
3a2b436a | 1372 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1373 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1374 | enum pc_bounds_kind |
1375 | { | |
e385593e | 1376 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1377 | PC_BOUNDS_NOT_PRESENT, |
1378 | ||
e385593e JK |
1379 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1380 | were present but they do not form a valid range of PC addresses. */ | |
1381 | PC_BOUNDS_INVALID, | |
1382 | ||
3a2b436a JK |
1383 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1384 | PC_BOUNDS_RANGES, | |
1385 | ||
1386 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1387 | PC_BOUNDS_HIGH_LOW, | |
1388 | }; | |
1389 | ||
1390 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1391 | CORE_ADDR *, CORE_ADDR *, | |
1392 | struct dwarf2_cu *, | |
891813be | 1393 | dwarf2_psymtab *); |
c906108c | 1394 | |
fae299cd DC |
1395 | static void get_scope_pc_bounds (struct die_info *, |
1396 | CORE_ADDR *, CORE_ADDR *, | |
1397 | struct dwarf2_cu *); | |
1398 | ||
801e3a5b JB |
1399 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1400 | CORE_ADDR, struct dwarf2_cu *); | |
1401 | ||
a14ed312 | 1402 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1403 | struct dwarf2_cu *); |
c906108c | 1404 | |
a14ed312 | 1405 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1406 | struct type *, struct dwarf2_cu *); |
c906108c | 1407 | |
a14ed312 | 1408 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1409 | struct die_info *, struct type *, |
e7c27a73 | 1410 | struct dwarf2_cu *); |
c906108c | 1411 | |
a14ed312 | 1412 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1413 | struct type *, |
1414 | struct dwarf2_cu *); | |
c906108c | 1415 | |
134d01f1 | 1416 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1417 | |
e7c27a73 | 1418 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1419 | |
e7c27a73 | 1420 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1421 | |
5d7cb8df JK |
1422 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1423 | ||
804d2729 | 1424 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1425 | |
27aa8d6a SW |
1426 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1427 | ||
74921315 KS |
1428 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1429 | ||
f55ee35c JK |
1430 | static struct type *read_module_type (struct die_info *die, |
1431 | struct dwarf2_cu *cu); | |
1432 | ||
38d518c9 | 1433 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1434 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1435 | |
134d01f1 | 1436 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1437 | |
7d79de9a TT |
1438 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *, |
1439 | bool * = nullptr); | |
c906108c | 1440 | |
6e70227d | 1441 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1442 | struct dwarf2_cu *); |
1443 | ||
bf6af496 | 1444 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1445 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1446 | struct die_info *); |
639d11d3 | 1447 | |
dee91e82 | 1448 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1449 | const gdb_byte *info_ptr, |
1450 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1451 | struct die_info *parent); |
1452 | ||
d521ce57 TT |
1453 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1454 | struct die_info **, const gdb_byte *, | |
3e225074 | 1455 | int); |
3019eac3 | 1456 | |
d521ce57 | 1457 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1458 | struct die_info **, const gdb_byte *); |
93311388 | 1459 | |
e7c27a73 | 1460 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1461 | |
15d034d0 | 1462 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
be1e3d3e | 1463 | struct objfile *); |
71c25dea | 1464 | |
15d034d0 | 1465 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1466 | |
15d034d0 | 1467 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1468 | struct die_info *die, |
1469 | struct dwarf2_cu *cu); | |
1470 | ||
ca69b9e6 DE |
1471 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1472 | struct dwarf2_cu *cu); | |
1473 | ||
e142c38c | 1474 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1475 | struct dwarf2_cu **); |
9219021c | 1476 | |
d97bc12b DE |
1477 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1478 | ||
1479 | static void dump_die_for_error (struct die_info *); | |
1480 | ||
1481 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1482 | struct die_info *); | |
c906108c | 1483 | |
d97bc12b | 1484 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1485 | |
51545339 | 1486 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1487 | struct dwarf2_cu *); |
c906108c | 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 | ||
4390d890 DE |
1680 | static void |
1681 | dwarf2_debug_line_missing_file_complaint (void) | |
1682 | { | |
b98664d3 | 1683 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1684 | } |
1685 | ||
1686 | static void | |
1687 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1688 | { | |
b98664d3 | 1689 | complaint (_(".debug_line section has line " |
4390d890 DE |
1690 | "program sequence without an end")); |
1691 | } | |
1692 | ||
1693 | static void | |
1694 | dwarf2_complex_location_expr_complaint (void) | |
1695 | { | |
b98664d3 | 1696 | complaint (_("location expression too complex")); |
4390d890 DE |
1697 | } |
1698 | ||
1699 | static void | |
1700 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1701 | int arg3) | |
1702 | { | |
b98664d3 | 1703 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1704 | arg1, arg2, arg3); |
1705 | } | |
1706 | ||
4390d890 DE |
1707 | static void |
1708 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1709 | { | |
b98664d3 | 1710 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1711 | arg1, arg2); |
1712 | } | |
527f3840 JK |
1713 | |
1714 | /* Hash function for line_header_hash. */ | |
1715 | ||
1716 | static hashval_t | |
1717 | line_header_hash (const struct line_header *ofs) | |
1718 | { | |
9c541725 | 1719 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1720 | } |
1721 | ||
1722 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1723 | ||
1724 | static hashval_t | |
1725 | line_header_hash_voidp (const void *item) | |
1726 | { | |
9a3c8263 | 1727 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1728 | |
1729 | return line_header_hash (ofs); | |
1730 | } | |
1731 | ||
1732 | /* Equality function for line_header_hash. */ | |
1733 | ||
1734 | static int | |
1735 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1736 | { | |
9a3c8263 SM |
1737 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1738 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1739 | |
9c541725 | 1740 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1741 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1742 | } | |
1743 | ||
4390d890 | 1744 | \f |
9291a0cd | 1745 | |
330cdd98 PA |
1746 | /* See declaration. */ |
1747 | ||
1748 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
1749 | const dwarf2_debug_sections *names, |
1750 | bool can_copy_) | |
1751 | : objfile (objfile_), | |
1752 | can_copy (can_copy_) | |
330cdd98 PA |
1753 | { |
1754 | if (names == NULL) | |
1755 | names = &dwarf2_elf_names; | |
1756 | ||
1757 | bfd *obfd = objfile->obfd; | |
1758 | ||
1759 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
1760 | locate_sections (obfd, sec, *names); | |
1761 | } | |
1762 | ||
1763 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
1764 | { | |
1765 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
1766 | free_cached_comp_units (); | |
1767 | ||
b76e467d | 1768 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
ae640021 | 1769 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1770 | |
b2bdb8cf | 1771 | for (signatured_type *sig_type : all_type_units) |
ae640021 | 1772 | sig_type->per_cu.imported_symtabs_free (); |
fc8e7e75 | 1773 | |
330cdd98 PA |
1774 | /* Everything else should be on the objfile obstack. */ |
1775 | } | |
1776 | ||
1777 | /* See declaration. */ | |
1778 | ||
1779 | void | |
1780 | dwarf2_per_objfile::free_cached_comp_units () | |
1781 | { | |
1782 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
1783 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
1784 | while (per_cu != NULL) | |
1785 | { | |
1786 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
1787 | ||
fcd3b13d | 1788 | delete per_cu->cu; |
330cdd98 PA |
1789 | *last_chain = next_cu; |
1790 | per_cu = next_cu; | |
1791 | } | |
1792 | } | |
1793 | ||
11ed8cad TT |
1794 | /* A helper class that calls free_cached_comp_units on |
1795 | destruction. */ | |
1796 | ||
1797 | class free_cached_comp_units | |
1798 | { | |
1799 | public: | |
1800 | ||
1801 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1802 | : m_per_objfile (per_objfile) | |
1803 | { | |
1804 | } | |
1805 | ||
1806 | ~free_cached_comp_units () | |
1807 | { | |
1808 | m_per_objfile->free_cached_comp_units (); | |
1809 | } | |
1810 | ||
1811 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1812 | ||
1813 | private: | |
1814 | ||
1815 | dwarf2_per_objfile *m_per_objfile; | |
1816 | }; | |
1817 | ||
c906108c | 1818 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1819 | information and return true if we have enough to do something. |
1820 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1821 | ELF names are used. CAN_COPY is true for formats where symbol |
1822 | interposition is possible and so symbol values must follow copy | |
1823 | relocation rules. */ | |
c906108c SS |
1824 | |
1825 | int | |
251d32d9 | 1826 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
1827 | const struct dwarf2_debug_sections *names, |
1828 | bool can_copy) | |
c906108c | 1829 | { |
97cbe998 SDJ |
1830 | if (objfile->flags & OBJF_READNEVER) |
1831 | return 0; | |
1832 | ||
ed2dc618 SM |
1833 | struct dwarf2_per_objfile *dwarf2_per_objfile |
1834 | = get_dwarf2_per_objfile (objfile); | |
1835 | ||
1836 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 1837 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
1838 | names, |
1839 | can_copy); | |
5bfd760d | 1840 | |
73869dc2 | 1841 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 1842 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 1843 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 1844 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
1845 | } |
1846 | ||
251d32d9 TG |
1847 | /* When loading sections, we look either for uncompressed section or for |
1848 | compressed section names. */ | |
233a11ab CS |
1849 | |
1850 | static int | |
251d32d9 TG |
1851 | section_is_p (const char *section_name, |
1852 | const struct dwarf2_section_names *names) | |
233a11ab | 1853 | { |
251d32d9 TG |
1854 | if (names->normal != NULL |
1855 | && strcmp (section_name, names->normal) == 0) | |
1856 | return 1; | |
1857 | if (names->compressed != NULL | |
1858 | && strcmp (section_name, names->compressed) == 0) | |
1859 | return 1; | |
1860 | return 0; | |
233a11ab CS |
1861 | } |
1862 | ||
330cdd98 | 1863 | /* See declaration. */ |
c906108c | 1864 | |
330cdd98 PA |
1865 | void |
1866 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
1867 | const dwarf2_debug_sections &names) | |
c906108c | 1868 | { |
fd361982 | 1869 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1870 | |
dc7650b8 JK |
1871 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1872 | { | |
1873 | } | |
950b7495 KS |
1874 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1875 | > bfd_get_file_size (abfd)) | |
1876 | { | |
1877 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1878 | warning (_("Discarding section %s which has a section size (%s" | |
1879 | ") larger than the file size [in module %s]"), | |
1880 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1881 | bfd_get_filename (abfd)); | |
1882 | } | |
330cdd98 | 1883 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 1884 | { |
330cdd98 | 1885 | this->info.s.section = sectp; |
fd361982 | 1886 | this->info.size = bfd_section_size (sectp); |
c906108c | 1887 | } |
330cdd98 | 1888 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 1889 | { |
330cdd98 | 1890 | this->abbrev.s.section = sectp; |
fd361982 | 1891 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1892 | } |
330cdd98 | 1893 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 1894 | { |
330cdd98 | 1895 | this->line.s.section = sectp; |
fd361982 | 1896 | this->line.size = bfd_section_size (sectp); |
c906108c | 1897 | } |
330cdd98 | 1898 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 1899 | { |
330cdd98 | 1900 | this->loc.s.section = sectp; |
fd361982 | 1901 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1902 | } |
330cdd98 | 1903 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 1904 | { |
330cdd98 | 1905 | this->loclists.s.section = sectp; |
fd361982 | 1906 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1907 | } |
330cdd98 | 1908 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 1909 | { |
330cdd98 | 1910 | this->macinfo.s.section = sectp; |
fd361982 | 1911 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1912 | } |
330cdd98 | 1913 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 1914 | { |
330cdd98 | 1915 | this->macro.s.section = sectp; |
fd361982 | 1916 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1917 | } |
330cdd98 | 1918 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 1919 | { |
330cdd98 | 1920 | this->str.s.section = sectp; |
fd361982 | 1921 | this->str.size = bfd_section_size (sectp); |
c906108c | 1922 | } |
18a8505e AT |
1923 | else if (section_is_p (sectp->name, &names.str_offsets)) |
1924 | { | |
1925 | this->str_offsets.s.section = sectp; | |
1926 | this->str_offsets.size = bfd_section_size (sectp); | |
1927 | } | |
330cdd98 | 1928 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 1929 | { |
330cdd98 | 1930 | this->line_str.s.section = sectp; |
fd361982 | 1931 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1932 | } |
330cdd98 | 1933 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 1934 | { |
330cdd98 | 1935 | this->addr.s.section = sectp; |
fd361982 | 1936 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1937 | } |
330cdd98 | 1938 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 1939 | { |
330cdd98 | 1940 | this->frame.s.section = sectp; |
fd361982 | 1941 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1942 | } |
330cdd98 | 1943 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 1944 | { |
330cdd98 | 1945 | this->eh_frame.s.section = sectp; |
fd361982 | 1946 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1947 | } |
330cdd98 | 1948 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 1949 | { |
330cdd98 | 1950 | this->ranges.s.section = sectp; |
fd361982 | 1951 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1952 | } |
330cdd98 | 1953 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 1954 | { |
330cdd98 | 1955 | this->rnglists.s.section = sectp; |
fd361982 | 1956 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1957 | } |
330cdd98 | 1958 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 1959 | { |
8b70b953 TT |
1960 | struct dwarf2_section_info type_section; |
1961 | ||
1962 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1963 | type_section.s.section = sectp; |
fd361982 | 1964 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1965 | |
fd5866f6 | 1966 | this->types.push_back (type_section); |
348e048f | 1967 | } |
330cdd98 | 1968 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 1969 | { |
330cdd98 | 1970 | this->gdb_index.s.section = sectp; |
fd361982 | 1971 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1972 | } |
927aa2e7 JK |
1973 | else if (section_is_p (sectp->name, &names.debug_names)) |
1974 | { | |
1975 | this->debug_names.s.section = sectp; | |
fd361982 | 1976 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
1977 | } |
1978 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
1979 | { | |
1980 | this->debug_aranges.s.section = sectp; | |
fd361982 | 1981 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 1982 | } |
dce234bc | 1983 | |
fd361982 AM |
1984 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
1985 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 1986 | this->has_section_at_zero = true; |
c906108c SS |
1987 | } |
1988 | ||
dce234bc | 1989 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1990 | SECTION_NAME. */ |
af34e669 | 1991 | |
dce234bc | 1992 | void |
3017a003 TG |
1993 | dwarf2_get_section_info (struct objfile *objfile, |
1994 | enum dwarf2_section_enum sect, | |
d521ce57 | 1995 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
1996 | bfd_size_type *sizep) |
1997 | { | |
5bfd760d | 1998 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 1999 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2000 | |
2001 | /* We may see an objfile without any DWARF, in which case we just | |
2002 | return nothing. */ | |
2003 | if (data == NULL) | |
2004 | { | |
2005 | *sectp = NULL; | |
2006 | *bufp = NULL; | |
2007 | *sizep = 0; | |
2008 | return; | |
2009 | } | |
3017a003 TG |
2010 | switch (sect) |
2011 | { | |
2012 | case DWARF2_DEBUG_FRAME: | |
2013 | info = &data->frame; | |
2014 | break; | |
2015 | case DWARF2_EH_FRAME: | |
2016 | info = &data->eh_frame; | |
2017 | break; | |
2018 | default: | |
2019 | gdb_assert_not_reached ("unexpected section"); | |
2020 | } | |
dce234bc | 2021 | |
96b79293 | 2022 | info->read (objfile); |
dce234bc | 2023 | |
96b79293 | 2024 | *sectp = info->get_bfd_section (); |
dce234bc PP |
2025 | *bufp = info->buffer; |
2026 | *sizep = info->size; | |
2027 | } | |
2028 | ||
36586728 TT |
2029 | /* A helper function to find the sections for a .dwz file. */ |
2030 | ||
2031 | static void | |
2032 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2033 | { | |
9a3c8263 | 2034 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2035 | |
2036 | /* Note that we only support the standard ELF names, because .dwz | |
2037 | is ELF-only (at the time of writing). */ | |
2038 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2039 | { | |
049412e3 | 2040 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2041 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2042 | } |
2043 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2044 | { | |
049412e3 | 2045 | dwz_file->info.s.section = sectp; |
fd361982 | 2046 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2047 | } |
2048 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2049 | { | |
049412e3 | 2050 | dwz_file->str.s.section = sectp; |
fd361982 | 2051 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2052 | } |
2053 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2054 | { | |
049412e3 | 2055 | dwz_file->line.s.section = sectp; |
fd361982 | 2056 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2057 | } |
2058 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2059 | { | |
049412e3 | 2060 | dwz_file->macro.s.section = sectp; |
fd361982 | 2061 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2062 | } |
2ec9a5e0 TT |
2063 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2064 | { | |
049412e3 | 2065 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2066 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2067 | } |
927aa2e7 JK |
2068 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2069 | { | |
2070 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2071 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2072 | } |
36586728 TT |
2073 | } |
2074 | ||
c4973306 | 2075 | /* See dwarf2read.h. */ |
36586728 | 2076 | |
c4973306 | 2077 | struct dwz_file * |
ed2dc618 | 2078 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2079 | { |
36586728 | 2080 | const char *filename; |
acd13123 | 2081 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2082 | size_t buildid_len; |
2083 | bfd_byte *buildid; | |
36586728 TT |
2084 | |
2085 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2086 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2087 | |
4db1a1dc | 2088 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2089 | gdb::unique_xmalloc_ptr<char> data |
2090 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2091 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2092 | if (data == NULL) |
2093 | { | |
2094 | if (bfd_get_error () == bfd_error_no_error) | |
2095 | return NULL; | |
2096 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2097 | bfd_errmsg (bfd_get_error ())); | |
2098 | } | |
791afaa2 TT |
2099 | |
2100 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2101 | |
acd13123 TT |
2102 | buildid_len = (size_t) buildid_len_arg; |
2103 | ||
791afaa2 | 2104 | filename = data.get (); |
d721ba37 PA |
2105 | |
2106 | std::string abs_storage; | |
36586728 TT |
2107 | if (!IS_ABSOLUTE_PATH (filename)) |
2108 | { | |
14278e1f TT |
2109 | gdb::unique_xmalloc_ptr<char> abs |
2110 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2111 | |
14278e1f | 2112 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2113 | filename = abs_storage.c_str (); |
36586728 TT |
2114 | } |
2115 | ||
dc294be5 TT |
2116 | /* First try the file name given in the section. If that doesn't |
2117 | work, try to use the build-id instead. */ | |
192b62ce | 2118 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2119 | if (dwz_bfd != NULL) |
36586728 | 2120 | { |
192b62ce | 2121 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2122 | dwz_bfd.reset (nullptr); |
36586728 TT |
2123 | } |
2124 | ||
dc294be5 TT |
2125 | if (dwz_bfd == NULL) |
2126 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2127 | ||
0d79cdc4 AM |
2128 | if (dwz_bfd == nullptr) |
2129 | { | |
2130 | gdb::unique_xmalloc_ptr<char> alt_filename; | |
2131 | const char *origname = dwarf2_per_objfile->objfile->original_name; | |
2132 | ||
2133 | scoped_fd fd (debuginfod_debuginfo_query (buildid, | |
2134 | buildid_len, | |
2135 | origname, | |
2136 | &alt_filename)); | |
2137 | ||
2138 | if (fd.get () >= 0) | |
2139 | { | |
2140 | /* File successfully retrieved from server. */ | |
2141 | dwz_bfd = gdb_bfd_open (alt_filename.get (), gnutarget, -1); | |
2142 | ||
2143 | if (dwz_bfd == nullptr) | |
2144 | warning (_("File \"%s\" from debuginfod cannot be opened as bfd"), | |
2145 | alt_filename.get ()); | |
2146 | else if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) | |
2147 | dwz_bfd.reset (nullptr); | |
2148 | } | |
2149 | } | |
2150 | ||
dc294be5 TT |
2151 | if (dwz_bfd == NULL) |
2152 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2153 | objfile_name (dwarf2_per_objfile->objfile)); | |
2154 | ||
7ff8cb8c TT |
2155 | std::unique_ptr<struct dwz_file> result |
2156 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2157 | |
7ff8cb8c TT |
2158 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2159 | result.get ()); | |
36586728 | 2160 | |
7ff8cb8c TT |
2161 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2162 | result->dwz_bfd.get ()); | |
2163 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2164 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2165 | } |
9291a0cd | 2166 | \f |
7b9f3c50 DE |
2167 | /* DWARF quick_symbols_functions support. */ |
2168 | ||
2169 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2170 | unique line tables, so we maintain a separate table of all .debug_line | |
2171 | derived entries to support the sharing. | |
2172 | All the quick functions need is the list of file names. We discard the | |
2173 | line_header when we're done and don't need to record it here. */ | |
2174 | struct quick_file_names | |
2175 | { | |
094b34ac DE |
2176 | /* The data used to construct the hash key. */ |
2177 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2178 | |
2179 | /* The number of entries in file_names, real_names. */ | |
2180 | unsigned int num_file_names; | |
2181 | ||
2182 | /* The file names from the line table, after being run through | |
2183 | file_full_name. */ | |
2184 | const char **file_names; | |
2185 | ||
2186 | /* The file names from the line table after being run through | |
2187 | gdb_realpath. These are computed lazily. */ | |
2188 | const char **real_names; | |
2189 | }; | |
2190 | ||
2191 | /* When using the index (and thus not using psymtabs), each CU has an | |
2192 | object of this type. This is used to hold information needed by | |
2193 | the various "quick" methods. */ | |
2194 | struct dwarf2_per_cu_quick_data | |
2195 | { | |
2196 | /* The file table. This can be NULL if there was no file table | |
2197 | or it's currently not read in. | |
2198 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2199 | struct quick_file_names *file_names; | |
2200 | ||
2201 | /* The corresponding symbol table. This is NULL if symbols for this | |
2202 | CU have not yet been read. */ | |
43f3e411 | 2203 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2204 | |
2205 | /* A temporary mark bit used when iterating over all CUs in | |
2206 | expand_symtabs_matching. */ | |
2207 | unsigned int mark : 1; | |
2208 | ||
2209 | /* True if we've tried to read the file table and found there isn't one. | |
2210 | There will be no point in trying to read it again next time. */ | |
2211 | unsigned int no_file_data : 1; | |
2212 | }; | |
2213 | ||
094b34ac DE |
2214 | /* Utility hash function for a stmt_list_hash. */ |
2215 | ||
2216 | static hashval_t | |
2217 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2218 | { | |
2219 | hashval_t v = 0; | |
2220 | ||
2221 | if (stmt_list_hash->dwo_unit != NULL) | |
2222 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2223 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2224 | return v; |
2225 | } | |
2226 | ||
2227 | /* Utility equality function for a stmt_list_hash. */ | |
2228 | ||
2229 | static int | |
2230 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2231 | const struct stmt_list_hash *rhs) | |
2232 | { | |
2233 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2234 | return 0; | |
2235 | if (lhs->dwo_unit != NULL | |
2236 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2237 | return 0; | |
2238 | ||
9c541725 | 2239 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2240 | } |
2241 | ||
7b9f3c50 DE |
2242 | /* Hash function for a quick_file_names. */ |
2243 | ||
2244 | static hashval_t | |
2245 | hash_file_name_entry (const void *e) | |
2246 | { | |
9a3c8263 SM |
2247 | const struct quick_file_names *file_data |
2248 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2249 | |
094b34ac | 2250 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2251 | } |
2252 | ||
2253 | /* Equality function for a quick_file_names. */ | |
2254 | ||
2255 | static int | |
2256 | eq_file_name_entry (const void *a, const void *b) | |
2257 | { | |
9a3c8263 SM |
2258 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2259 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2260 | |
094b34ac | 2261 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2262 | } |
2263 | ||
2264 | /* Delete function for a quick_file_names. */ | |
2265 | ||
2266 | static void | |
2267 | delete_file_name_entry (void *e) | |
2268 | { | |
9a3c8263 | 2269 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2270 | int i; |
2271 | ||
2272 | for (i = 0; i < file_data->num_file_names; ++i) | |
2273 | { | |
2274 | xfree ((void*) file_data->file_names[i]); | |
2275 | if (file_data->real_names) | |
2276 | xfree ((void*) file_data->real_names[i]); | |
2277 | } | |
2278 | ||
2279 | /* The space for the struct itself lives on objfile_obstack, | |
2280 | so we don't free it here. */ | |
2281 | } | |
2282 | ||
2283 | /* Create a quick_file_names hash table. */ | |
2284 | ||
5895093f | 2285 | static htab_up |
7b9f3c50 DE |
2286 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2287 | { | |
5895093f TT |
2288 | return htab_up (htab_create_alloc (nr_initial_entries, |
2289 | hash_file_name_entry, eq_file_name_entry, | |
2290 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2291 | } |
9291a0cd | 2292 | |
918dd910 JK |
2293 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2294 | have to be created afterwards. You should call age_cached_comp_units after | |
2295 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2296 | ||
2297 | static void | |
58f0c718 | 2298 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2299 | { |
3019eac3 | 2300 | if (per_cu->is_debug_types) |
e5fe5e75 | 2301 | load_full_type_unit (per_cu); |
918dd910 | 2302 | else |
58f0c718 | 2303 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2304 | |
cc12ce38 DE |
2305 | if (per_cu->cu == NULL) |
2306 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2307 | |
2308 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2309 | } |
2310 | ||
a0f42c21 | 2311 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2312 | |
9291a0cd | 2313 | static void |
58f0c718 | 2314 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2315 | { |
ed2dc618 | 2316 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2317 | |
f4dc4d17 DE |
2318 | /* Skip type_unit_groups, reading the type units they contain |
2319 | is handled elsewhere. */ | |
197400e8 | 2320 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2321 | return; |
2322 | ||
b303c6f6 AB |
2323 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2324 | the queue. After this point we're guaranteed to leave this function | |
2325 | with the dwarf queue empty. */ | |
39856def | 2326 | dwarf2_queue_guard q_guard (dwarf2_per_objfile); |
9291a0cd | 2327 | |
95554aad | 2328 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2329 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2330 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2331 | { | |
2332 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2333 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2334 | |
2335 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2336 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2337 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2338 | if (!per_cu->is_debug_types | |
cc12ce38 | 2339 | && per_cu->cu != NULL |
89e63ee4 DE |
2340 | && per_cu->cu->dwo_unit != NULL |
2341 | && dwarf2_per_objfile->index_table != NULL | |
2342 | && dwarf2_per_objfile->index_table->version <= 7 | |
2343 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2344 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2345 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2346 | } |
9291a0cd | 2347 | |
ed2dc618 | 2348 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2349 | |
2350 | /* Age the cache, releasing compilation units that have not | |
2351 | been used recently. */ | |
ed2dc618 | 2352 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2353 | } |
2354 | ||
2355 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2356 | the objfile from which this CU came. Returns the resulting symbol | |
2357 | table. */ | |
2fdf6df6 | 2358 | |
43f3e411 | 2359 | static struct compunit_symtab * |
58f0c718 | 2360 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2361 | { |
ed2dc618 SM |
2362 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2363 | ||
95554aad | 2364 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2365 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2366 | { |
11ed8cad | 2367 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2368 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2369 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2370 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2371 | } |
f194fefb | 2372 | |
43f3e411 | 2373 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2374 | } |
2375 | ||
ff4c9fec | 2376 | /* See declaration. */ |
f4dc4d17 | 2377 | |
ff4c9fec SM |
2378 | dwarf2_per_cu_data * |
2379 | dwarf2_per_objfile::get_cutu (int index) | |
2380 | { | |
b76e467d | 2381 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2382 | { |
b76e467d | 2383 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2384 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2385 | return &this->all_type_units[index]->per_cu; |
2386 | } | |
f4dc4d17 | 2387 | |
ff4c9fec SM |
2388 | return this->all_comp_units[index]; |
2389 | } | |
f4dc4d17 | 2390 | |
ff4c9fec | 2391 | /* See declaration. */ |
2fdf6df6 | 2392 | |
ff4c9fec SM |
2393 | dwarf2_per_cu_data * |
2394 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2395 | { |
b76e467d | 2396 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2397 | |
ff4c9fec | 2398 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2399 | } |
2400 | ||
ff4c9fec | 2401 | /* See declaration. */ |
f4dc4d17 | 2402 | |
ff4c9fec SM |
2403 | signatured_type * |
2404 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2405 | { |
b2bdb8cf | 2406 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2407 | |
ff4c9fec | 2408 | return this->all_type_units[index]; |
1fd400ff TT |
2409 | } |
2410 | ||
4b514bc8 JK |
2411 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2412 | objfile_obstack, and constructed with the specified field | |
2413 | values. */ | |
2414 | ||
2415 | static dwarf2_per_cu_data * | |
ed2dc618 | 2416 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2417 | struct dwarf2_section_info *section, |
2418 | int is_dwz, | |
2419 | sect_offset sect_off, ULONGEST length) | |
2420 | { | |
ed2dc618 | 2421 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2422 | dwarf2_per_cu_data *the_cu |
2423 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2424 | struct dwarf2_per_cu_data); | |
2425 | the_cu->sect_off = sect_off; | |
2426 | the_cu->length = length; | |
e3b94546 | 2427 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2428 | the_cu->section = section; |
2429 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2430 | struct dwarf2_per_cu_quick_data); | |
2431 | the_cu->is_dwz = is_dwz; | |
2432 | return the_cu; | |
2433 | } | |
2434 | ||
2ec9a5e0 TT |
2435 | /* A helper for create_cus_from_index that handles a given list of |
2436 | CUs. */ | |
2fdf6df6 | 2437 | |
74a0d9f6 | 2438 | static void |
12359b5e | 2439 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2440 | const gdb_byte *cu_list, offset_type n_elements, |
2441 | struct dwarf2_section_info *section, | |
b76e467d | 2442 | int is_dwz) |
9291a0cd | 2443 | { |
12359b5e | 2444 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2445 | { |
74a0d9f6 | 2446 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2447 | |
2448 | sect_offset sect_off | |
2449 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2450 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2451 | cu_list += 2 * 8; |
2452 | ||
b76e467d | 2453 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2454 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2455 | sect_off, length); | |
b76e467d | 2456 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2457 | } |
9291a0cd TT |
2458 | } |
2459 | ||
2ec9a5e0 | 2460 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2461 | the CU objects for this objfile. */ |
2ec9a5e0 | 2462 | |
74a0d9f6 | 2463 | static void |
12359b5e | 2464 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2465 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2466 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2467 | { | |
b76e467d SM |
2468 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
2469 | dwarf2_per_objfile->all_comp_units.reserve | |
2470 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2471 | |
12359b5e | 2472 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 2473 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
2474 | |
2475 | if (dwz_elements == 0) | |
74a0d9f6 | 2476 | return; |
2ec9a5e0 | 2477 | |
12359b5e SM |
2478 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
2479 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 2480 | &dwz->info, 1); |
2ec9a5e0 TT |
2481 | } |
2482 | ||
1fd400ff | 2483 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2484 | |
74a0d9f6 | 2485 | static void |
12359b5e SM |
2486 | create_signatured_type_table_from_index |
2487 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
2488 | struct dwarf2_section_info *section, | |
2489 | const gdb_byte *bytes, | |
2490 | offset_type elements) | |
1fd400ff | 2491 | { |
12359b5e | 2492 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 2493 | |
b2bdb8cf SM |
2494 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2495 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 2496 | |
298e9637 | 2497 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2498 | |
12359b5e | 2499 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2500 | { |
52dc124a | 2501 | struct signatured_type *sig_type; |
9c541725 | 2502 | ULONGEST signature; |
1fd400ff | 2503 | void **slot; |
9c541725 | 2504 | cu_offset type_offset_in_tu; |
1fd400ff | 2505 | |
74a0d9f6 | 2506 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2507 | sect_offset sect_off |
2508 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2509 | type_offset_in_tu | |
2510 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2511 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2512 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2513 | bytes += 3 * 8; | |
2514 | ||
52dc124a | 2515 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2516 | struct signatured_type); |
52dc124a | 2517 | sig_type->signature = signature; |
9c541725 | 2518 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 2519 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 2520 | sig_type->per_cu.section = section; |
9c541725 | 2521 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 2522 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 2523 | sig_type->per_cu.v.quick |
1fd400ff TT |
2524 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2525 | struct dwarf2_per_cu_quick_data); | |
2526 | ||
b0b6a987 | 2527 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
52dc124a | 2528 | *slot = sig_type; |
1fd400ff | 2529 | |
b2bdb8cf | 2530 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
2531 | } |
2532 | ||
b0b6a987 | 2533 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2534 | } |
2535 | ||
927aa2e7 JK |
2536 | /* Create the signatured type hash table from .debug_names. */ |
2537 | ||
2538 | static void | |
2539 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 2540 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2541 | const mapped_debug_names &map, |
2542 | struct dwarf2_section_info *section, | |
2543 | struct dwarf2_section_info *abbrev_section) | |
2544 | { | |
ed2dc618 SM |
2545 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2546 | ||
96b79293 TT |
2547 | section->read (objfile); |
2548 | abbrev_section->read (objfile); | |
927aa2e7 | 2549 | |
b2bdb8cf SM |
2550 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2551 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 | 2552 | |
298e9637 | 2553 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2554 | |
2555 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2556 | { | |
2557 | struct signatured_type *sig_type; | |
927aa2e7 | 2558 | void **slot; |
927aa2e7 JK |
2559 | |
2560 | sect_offset sect_off | |
2561 | = (sect_offset) (extract_unsigned_integer | |
2562 | (map.tu_table_reordered + i * map.offset_size, | |
2563 | map.offset_size, | |
2564 | map.dwarf5_byte_order)); | |
2565 | ||
2566 | comp_unit_head cu_header; | |
ed2dc618 SM |
2567 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
2568 | abbrev_section, | |
927aa2e7 JK |
2569 | section->buffer + to_underlying (sect_off), |
2570 | rcuh_kind::TYPE); | |
2571 | ||
2572 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2573 | struct signatured_type); | |
2574 | sig_type->signature = cu_header.signature; | |
2575 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
2576 | sig_type->per_cu.is_debug_types = 1; | |
2577 | sig_type->per_cu.section = section; | |
2578 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 2579 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
2580 | sig_type->per_cu.v.quick |
2581 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2582 | struct dwarf2_per_cu_quick_data); | |
2583 | ||
b0b6a987 | 2584 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
927aa2e7 JK |
2585 | *slot = sig_type; |
2586 | ||
b2bdb8cf | 2587 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
2588 | } |
2589 | ||
b0b6a987 | 2590 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2591 | } |
2592 | ||
9291a0cd TT |
2593 | /* Read the address map data from the mapped index, and use it to |
2594 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2595 | |
9291a0cd | 2596 | static void |
ed2dc618 SM |
2597 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2598 | struct mapped_index *index) | |
9291a0cd | 2599 | { |
ed2dc618 | 2600 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 2601 | struct gdbarch *gdbarch = objfile->arch (); |
9291a0cd | 2602 | const gdb_byte *iter, *end; |
9291a0cd | 2603 | struct addrmap *mutable_map; |
9291a0cd TT |
2604 | CORE_ADDR baseaddr; |
2605 | ||
8268c778 PA |
2606 | auto_obstack temp_obstack; |
2607 | ||
9291a0cd TT |
2608 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2609 | ||
f00a2de2 PA |
2610 | iter = index->address_table.data (); |
2611 | end = iter + index->address_table.size (); | |
9291a0cd | 2612 | |
b3b3bada | 2613 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2614 | |
2615 | while (iter < end) | |
2616 | { | |
2617 | ULONGEST hi, lo, cu_index; | |
2618 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2619 | iter += 8; | |
2620 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2621 | iter += 8; | |
2622 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2623 | iter += 4; | |
f652bce2 | 2624 | |
24a55014 | 2625 | if (lo > hi) |
f652bce2 | 2626 | { |
b98664d3 | 2627 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2628 | hex_string (lo), hex_string (hi)); |
24a55014 | 2629 | continue; |
f652bce2 | 2630 | } |
24a55014 | 2631 | |
b76e467d | 2632 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 2633 | { |
b98664d3 | 2634 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2635 | (unsigned) cu_index); |
24a55014 | 2636 | continue; |
f652bce2 | 2637 | } |
24a55014 | 2638 | |
79748972 TT |
2639 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2640 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2641 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 2642 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
2643 | } |
2644 | ||
d320c2b5 | 2645 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2646 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
2647 | } |
2648 | ||
927aa2e7 JK |
2649 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
2650 | populate the objfile's psymtabs_addrmap. */ | |
2651 | ||
2652 | static void | |
ed2dc618 | 2653 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2654 | struct dwarf2_section_info *section) |
2655 | { | |
ed2dc618 | 2656 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 | 2657 | bfd *abfd = objfile->obfd; |
08feed99 | 2658 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 2659 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
927aa2e7 JK |
2660 | |
2661 | auto_obstack temp_obstack; | |
2662 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2663 | ||
2664 | std::unordered_map<sect_offset, | |
2665 | dwarf2_per_cu_data *, | |
2666 | gdb::hash_enum<sect_offset>> | |
2667 | debug_info_offset_to_per_cu; | |
b76e467d | 2668 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 2669 | { |
927aa2e7 JK |
2670 | const auto insertpair |
2671 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
2672 | if (!insertpair.second) | |
2673 | { | |
2674 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2675 | "debug_info_offset %s, ignoring .debug_aranges."), |
2676 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2677 | return; |
2678 | } | |
2679 | } | |
2680 | ||
96b79293 | 2681 | section->read (objfile); |
927aa2e7 JK |
2682 | |
2683 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2684 | ||
2685 | const gdb_byte *addr = section->buffer; | |
2686 | ||
2687 | while (addr < section->buffer + section->size) | |
2688 | { | |
2689 | const gdb_byte *const entry_addr = addr; | |
2690 | unsigned int bytes_read; | |
2691 | ||
2692 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2693 | &bytes_read); | |
2694 | addr += bytes_read; | |
2695 | ||
2696 | const gdb_byte *const entry_end = addr + entry_length; | |
2697 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2698 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2699 | if (addr + entry_length > section->buffer + section->size) | |
2700 | { | |
47e3f474 | 2701 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2702 | "length %s exceeds section length %s, " |
2703 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2704 | objfile_name (objfile), |
2705 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2706 | plongest (bytes_read + entry_length), |
2707 | pulongest (section->size)); | |
2708 | return; | |
2709 | } | |
2710 | ||
2711 | /* The version number. */ | |
2712 | const uint16_t version = read_2_bytes (abfd, addr); | |
2713 | addr += 2; | |
2714 | if (version != 2) | |
2715 | { | |
47e3f474 | 2716 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2717 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2718 | objfile_name (objfile), |
2719 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2720 | return; |
2721 | } | |
2722 | ||
2723 | const uint64_t debug_info_offset | |
2724 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2725 | addr += offset_size; | |
2726 | const auto per_cu_it | |
2727 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2728 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2729 | { | |
47e3f474 | 2730 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2731 | "debug_info_offset %s does not exists, " |
2732 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2733 | objfile_name (objfile), |
2734 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2735 | pulongest (debug_info_offset)); |
2736 | return; | |
2737 | } | |
2738 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2739 | ||
2740 | const uint8_t address_size = *addr++; | |
2741 | if (address_size < 1 || address_size > 8) | |
2742 | { | |
47e3f474 | 2743 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2744 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2745 | objfile_name (objfile), |
2746 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2747 | return; |
2748 | } | |
2749 | ||
2750 | const uint8_t segment_selector_size = *addr++; | |
2751 | if (segment_selector_size != 0) | |
2752 | { | |
47e3f474 | 2753 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2754 | "segment_selector_size %u is not supported, " |
2755 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2756 | objfile_name (objfile), |
2757 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2758 | segment_selector_size); |
2759 | return; | |
2760 | } | |
2761 | ||
2762 | /* Must pad to an alignment boundary that is twice the address | |
2763 | size. It is undocumented by the DWARF standard but GCC does | |
2764 | use it. */ | |
2765 | for (size_t padding = ((-(addr - section->buffer)) | |
2766 | & (2 * address_size - 1)); | |
2767 | padding > 0; padding--) | |
2768 | if (*addr++ != 0) | |
2769 | { | |
47e3f474 | 2770 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2771 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2772 | objfile_name (objfile), |
2773 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2774 | return; |
2775 | } | |
2776 | ||
2777 | for (;;) | |
2778 | { | |
2779 | if (addr + 2 * address_size > entry_end) | |
2780 | { | |
47e3f474 | 2781 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2782 | "address list is not properly terminated, " |
2783 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2784 | objfile_name (objfile), |
2785 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2786 | return; |
2787 | } | |
2788 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2789 | dwarf5_byte_order); | |
2790 | addr += address_size; | |
2791 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2792 | dwarf5_byte_order); | |
2793 | addr += address_size; | |
2794 | if (start == 0 && length == 0) | |
2795 | break; | |
2796 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
2797 | { | |
2798 | /* Symbol was eliminated due to a COMDAT group. */ | |
2799 | continue; | |
2800 | } | |
2801 | ULONGEST end = start + length; | |
79748972 TT |
2802 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2803 | - baseaddr); | |
2804 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2805 | - baseaddr); | |
927aa2e7 JK |
2806 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2807 | } | |
2808 | } | |
2809 | ||
d320c2b5 | 2810 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2811 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
2812 | } |
2813 | ||
9291a0cd TT |
2814 | /* Find a slot in the mapped index INDEX for the object named NAME. |
2815 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
2816 | constant pool and return true. If NAME cannot be found, return |
2817 | false. */ | |
2fdf6df6 | 2818 | |
109483d9 | 2819 | static bool |
9291a0cd TT |
2820 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
2821 | offset_type **vec_out) | |
2822 | { | |
0cf03b49 | 2823 | offset_type hash; |
9291a0cd | 2824 | offset_type slot, step; |
559a7a62 | 2825 | int (*cmp) (const char *, const char *); |
9291a0cd | 2826 | |
791afaa2 | 2827 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 2828 | if (current_language->la_language == language_cplus |
45280282 IB |
2829 | || current_language->la_language == language_fortran |
2830 | || current_language->la_language == language_d) | |
0cf03b49 JK |
2831 | { |
2832 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2833 | not contain any. */ | |
a8719064 | 2834 | |
72998fb3 | 2835 | if (strchr (name, '(') != NULL) |
0cf03b49 | 2836 | { |
109483d9 | 2837 | without_params = cp_remove_params (name); |
0cf03b49 | 2838 | |
72998fb3 | 2839 | if (without_params != NULL) |
791afaa2 | 2840 | name = without_params.get (); |
0cf03b49 JK |
2841 | } |
2842 | } | |
2843 | ||
559a7a62 | 2844 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2845 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2846 | simulate our NAME being searched is also lowercased. */ |
2847 | hash = mapped_index_string_hash ((index->version == 4 | |
2848 | && case_sensitivity == case_sensitive_off | |
2849 | ? 5 : index->version), | |
2850 | name); | |
2851 | ||
f00a2de2 PA |
2852 | slot = hash & (index->symbol_table.size () - 1); |
2853 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 2854 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2855 | |
2856 | for (;;) | |
2857 | { | |
9291a0cd | 2858 | const char *str; |
f00a2de2 PA |
2859 | |
2860 | const auto &bucket = index->symbol_table[slot]; | |
2861 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 2862 | return false; |
9291a0cd | 2863 | |
f00a2de2 | 2864 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 2865 | if (!cmp (name, str)) |
9291a0cd TT |
2866 | { |
2867 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 2868 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 2869 | return true; |
9291a0cd TT |
2870 | } |
2871 | ||
f00a2de2 | 2872 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
2873 | } |
2874 | } | |
2875 | ||
4485a1c1 SM |
2876 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2877 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2878 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2879 | ok to use deprecated sections. |
2880 | ||
2881 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2882 | out parameters that are filled in with information about the CU and | |
2883 | TU lists in the section. | |
2884 | ||
4485a1c1 | 2885 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2886 | |
d33bc52e | 2887 | static bool |
3810f182 | 2888 | read_gdb_index_from_buffer (const char *filename, |
4485a1c1 SM |
2889 | bool deprecated_ok, |
2890 | gdb::array_view<const gdb_byte> buffer, | |
2891 | struct mapped_index *map, | |
2892 | const gdb_byte **cu_list, | |
2893 | offset_type *cu_list_elements, | |
2894 | const gdb_byte **types_list, | |
2895 | offset_type *types_list_elements) | |
2896 | { | |
2897 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 2898 | |
9291a0cd | 2899 | /* Version check. */ |
4485a1c1 | 2900 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2901 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2902 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2903 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2904 | indices. */ |
831adc1f | 2905 | if (version < 4) |
481860b3 GB |
2906 | { |
2907 | static int warning_printed = 0; | |
2908 | if (!warning_printed) | |
2909 | { | |
2910 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2911 | filename); |
481860b3 GB |
2912 | warning_printed = 1; |
2913 | } | |
2914 | return 0; | |
2915 | } | |
2916 | /* Index version 4 uses a different hash function than index version | |
2917 | 5 and later. | |
2918 | ||
2919 | Versions earlier than 6 did not emit psymbols for inlined | |
2920 | functions. Using these files will cause GDB not to be able to | |
2921 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2922 | indices unless the user has done |
2923 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2924 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2925 | { |
2926 | static int warning_printed = 0; | |
2927 | if (!warning_printed) | |
2928 | { | |
e615022a DE |
2929 | warning (_("\ |
2930 | Skipping deprecated .gdb_index section in %s.\n\ | |
2931 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2932 | to use the section anyway."), | |
2ec9a5e0 | 2933 | filename); |
481860b3 GB |
2934 | warning_printed = 1; |
2935 | } | |
2936 | return 0; | |
2937 | } | |
796a7ff8 | 2938 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2939 | of the TU (for symbols coming from TUs), |
2940 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2941 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2942 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2943 | These are just performance bugs, and we can't distinguish gdb-generated | |
2944 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2945 | |
481860b3 | 2946 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2947 | longer backward compatible. */ |
796a7ff8 | 2948 | if (version > 8) |
594e8718 | 2949 | return 0; |
9291a0cd | 2950 | |
559a7a62 | 2951 | map->version = version; |
9291a0cd | 2952 | |
4485a1c1 | 2953 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 2954 | |
4485a1c1 | 2955 | int i = 0; |
2ec9a5e0 TT |
2956 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2957 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2958 | / 8); | |
1fd400ff TT |
2959 | ++i; |
2960 | ||
2ec9a5e0 TT |
2961 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2962 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2963 | - MAYBE_SWAP (metadata[i])) | |
2964 | / 8); | |
987d643c | 2965 | ++i; |
1fd400ff | 2966 | |
f00a2de2 PA |
2967 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
2968 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2969 | map->address_table | |
2970 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2971 | ++i; |
2972 | ||
f00a2de2 PA |
2973 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
2974 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2975 | map->symbol_table | |
2976 | = gdb::array_view<mapped_index::symbol_table_slot> | |
2977 | ((mapped_index::symbol_table_slot *) symbol_table, | |
2978 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 2979 | |
f00a2de2 | 2980 | ++i; |
f9d83a0b | 2981 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 2982 | |
2ec9a5e0 TT |
2983 | return 1; |
2984 | } | |
2985 | ||
4485a1c1 SM |
2986 | /* Callback types for dwarf2_read_gdb_index. */ |
2987 | ||
2988 | typedef gdb::function_view | |
2989 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
2990 | get_gdb_index_contents_ftype; | |
2991 | typedef gdb::function_view | |
2992 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
2993 | get_gdb_index_contents_dwz_ftype; | |
2994 | ||
927aa2e7 | 2995 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
2996 | elements of all the CUs and return 1. Otherwise, return 0. */ |
2997 | ||
2998 | static int | |
4485a1c1 SM |
2999 | dwarf2_read_gdb_index |
3000 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3001 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3002 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3003 | { |
2ec9a5e0 TT |
3004 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3005 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3006 | struct dwz_file *dwz; |
12359b5e | 3007 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3008 | |
4485a1c1 SM |
3009 | gdb::array_view<const gdb_byte> main_index_contents |
3010 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3011 | ||
3012 | if (main_index_contents.empty ()) | |
3013 | return 0; | |
3014 | ||
3063847f | 3015 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
3810f182 | 3016 | if (!read_gdb_index_from_buffer (objfile_name (objfile), |
4485a1c1 SM |
3017 | use_deprecated_index_sections, |
3018 | main_index_contents, map.get (), &cu_list, | |
3019 | &cu_list_elements, &types_list, | |
3020 | &types_list_elements)) | |
2ec9a5e0 TT |
3021 | return 0; |
3022 | ||
0fefef59 | 3023 | /* Don't use the index if it's empty. */ |
3063847f | 3024 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3025 | return 0; |
3026 | ||
2ec9a5e0 TT |
3027 | /* If there is a .dwz file, read it so we can get its CU list as |
3028 | well. */ | |
ed2dc618 | 3029 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3030 | if (dwz != NULL) |
2ec9a5e0 | 3031 | { |
2ec9a5e0 TT |
3032 | struct mapped_index dwz_map; |
3033 | const gdb_byte *dwz_types_ignore; | |
3034 | offset_type dwz_types_elements_ignore; | |
3035 | ||
4485a1c1 SM |
3036 | gdb::array_view<const gdb_byte> dwz_index_content |
3037 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3038 | ||
3039 | if (dwz_index_content.empty ()) | |
3040 | return 0; | |
3041 | ||
3810f182 | 3042 | if (!read_gdb_index_from_buffer (bfd_get_filename (dwz->dwz_bfd.get ()), |
00f93c44 | 3043 | 1, dwz_index_content, &dwz_map, |
4485a1c1 SM |
3044 | &dwz_list, &dwz_list_elements, |
3045 | &dwz_types_ignore, | |
3046 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3047 | { |
3048 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3049 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3050 | return 0; |
3051 | } | |
3052 | } | |
3053 | ||
12359b5e SM |
3054 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3055 | dwz_list, dwz_list_elements); | |
1fd400ff | 3056 | |
8b70b953 TT |
3057 | if (types_list_elements) |
3058 | { | |
8b70b953 TT |
3059 | /* We can only handle a single .debug_types when we have an |
3060 | index. */ | |
fd5866f6 | 3061 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3062 | return 0; |
3063 | ||
fd5866f6 | 3064 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3065 | |
12359b5e SM |
3066 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3067 | types_list, types_list_elements); | |
8b70b953 | 3068 | } |
9291a0cd | 3069 | |
3063847f | 3070 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3071 | |
3063847f | 3072 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3073 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3074 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3075 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3076 | |
3077 | return 1; | |
3078 | } | |
3079 | ||
dee91e82 | 3080 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3081 | |
dee91e82 DE |
3082 | static void |
3083 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3084 | const gdb_byte *info_ptr, |
3e225074 | 3085 | struct die_info *comp_unit_die) |
9291a0cd | 3086 | { |
dee91e82 | 3087 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3088 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3089 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3090 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3091 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3092 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3093 | struct attribute *attr; |
7b9f3c50 DE |
3094 | void **slot; |
3095 | struct quick_file_names *qfn; | |
9291a0cd | 3096 | |
0186c6a7 DE |
3097 | gdb_assert (! this_cu->is_debug_types); |
3098 | ||
07261596 TT |
3099 | /* Our callers never want to match partial units -- instead they |
3100 | will match the enclosing full CU. */ | |
3101 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3102 | { | |
3103 | this_cu->v.quick->no_file_data = 1; | |
3104 | return; | |
3105 | } | |
3106 | ||
0186c6a7 | 3107 | lh_cu = this_cu; |
7b9f3c50 | 3108 | slot = NULL; |
dee91e82 | 3109 | |
fff8551c | 3110 | line_header_up lh; |
9c541725 | 3111 | sect_offset line_offset {}; |
fff8551c | 3112 | |
dee91e82 | 3113 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
435d3d88 | 3114 | if (attr != nullptr) |
9291a0cd | 3115 | { |
7b9f3c50 DE |
3116 | struct quick_file_names find_entry; |
3117 | ||
9c541725 | 3118 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3119 | |
3120 | /* We may have already read in this line header (TU line header sharing). | |
3121 | If we have we're done. */ | |
094b34ac | 3122 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3123 | find_entry.hash.line_sect_off = line_offset; |
5895093f | 3124 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 DE |
3125 | &find_entry, INSERT); |
3126 | if (*slot != NULL) | |
3127 | { | |
9a3c8263 | 3128 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3129 | return; |
7b9f3c50 DE |
3130 | } |
3131 | ||
3019eac3 | 3132 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3133 | } |
3134 | if (lh == NULL) | |
3135 | { | |
094b34ac | 3136 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3137 | return; |
9291a0cd TT |
3138 | } |
3139 | ||
8d749320 | 3140 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3141 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3142 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3143 | gdb_assert (slot != NULL); |
3144 | *slot = qfn; | |
9291a0cd | 3145 | |
d721ba37 | 3146 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3147 | |
aa391654 TT |
3148 | int offset = 0; |
3149 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3150 | ++offset; | |
3151 | ||
7ba99d21 | 3152 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 3153 | qfn->file_names = |
aa391654 TT |
3154 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3155 | if (offset != 0) | |
3156 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 3157 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
3158 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
3159 | fnd.comp_dir).release (); | |
7b9f3c50 | 3160 | qfn->real_names = NULL; |
9291a0cd | 3161 | |
094b34ac | 3162 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3163 | } |
3164 | ||
3165 | /* A helper for the "quick" functions which attempts to read the line | |
3166 | table for THIS_CU. */ | |
3167 | ||
3168 | static struct quick_file_names * | |
e4a48d9d | 3169 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3170 | { |
0186c6a7 DE |
3171 | /* This should never be called for TUs. */ |
3172 | gdb_assert (! this_cu->is_debug_types); | |
3173 | /* Nor type unit groups. */ | |
197400e8 | 3174 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 3175 | |
dee91e82 DE |
3176 | if (this_cu->v.quick->file_names != NULL) |
3177 | return this_cu->v.quick->file_names; | |
3178 | /* If we know there is no line data, no point in looking again. */ | |
3179 | if (this_cu->v.quick->no_file_data) | |
3180 | return NULL; | |
3181 | ||
c0ab21c2 TT |
3182 | cutu_reader reader (this_cu); |
3183 | if (!reader.dummy_p) | |
3e225074 | 3184 | dw2_get_file_names_reader (&reader, reader.info_ptr, reader.comp_unit_die); |
dee91e82 DE |
3185 | |
3186 | if (this_cu->v.quick->no_file_data) | |
3187 | return NULL; | |
3188 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3189 | } |
3190 | ||
3191 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3192 | real path for a given file name from the line table. */ |
2fdf6df6 | 3193 | |
9291a0cd | 3194 | static const char * |
7b9f3c50 DE |
3195 | dw2_get_real_path (struct objfile *objfile, |
3196 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3197 | { |
7b9f3c50 DE |
3198 | if (qfn->real_names == NULL) |
3199 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3200 | qfn->num_file_names, const char *); |
9291a0cd | 3201 | |
7b9f3c50 | 3202 | if (qfn->real_names[index] == NULL) |
14278e1f | 3203 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3204 | |
7b9f3c50 | 3205 | return qfn->real_names[index]; |
9291a0cd TT |
3206 | } |
3207 | ||
3208 | static struct symtab * | |
3209 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3210 | { | |
ed2dc618 SM |
3211 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3212 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3213 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3214 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3215 | |
43f3e411 DE |
3216 | if (cust == NULL) |
3217 | return NULL; | |
ed2dc618 | 3218 | |
43f3e411 | 3219 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3220 | } |
3221 | ||
7b9f3c50 DE |
3222 | /* Traversal function for dw2_forget_cached_source_info. */ |
3223 | ||
3224 | static int | |
3225 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3226 | { |
7b9f3c50 | 3227 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3228 | |
7b9f3c50 | 3229 | if (file_data->real_names) |
9291a0cd | 3230 | { |
7b9f3c50 | 3231 | int i; |
9291a0cd | 3232 | |
7b9f3c50 | 3233 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3234 | { |
7b9f3c50 DE |
3235 | xfree ((void*) file_data->real_names[i]); |
3236 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3237 | } |
3238 | } | |
7b9f3c50 DE |
3239 | |
3240 | return 1; | |
3241 | } | |
3242 | ||
3243 | static void | |
3244 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3245 | { | |
ed2dc618 SM |
3246 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3247 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 | 3248 | |
5895093f | 3249 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 | 3250 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3251 | } |
3252 | ||
f8eba3c6 TT |
3253 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3254 | the symtabs and calls the iterator. */ | |
3255 | ||
3256 | static int | |
3257 | dw2_map_expand_apply (struct objfile *objfile, | |
3258 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3259 | const char *name, const char *real_path, |
14bc53a8 | 3260 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3261 | { |
43f3e411 | 3262 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3263 | |
3264 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3265 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3266 | return 0; |
3267 | ||
3268 | /* This may expand more than one symtab, and we want to iterate over | |
3269 | all of them. */ | |
58f0c718 | 3270 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3271 | |
14bc53a8 PA |
3272 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3273 | last_made, callback); | |
f8eba3c6 TT |
3274 | } |
3275 | ||
3276 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3277 | ||
14bc53a8 PA |
3278 | static bool |
3279 | dw2_map_symtabs_matching_filename | |
3280 | (struct objfile *objfile, const char *name, const char *real_path, | |
3281 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3282 | { |
c011a4f4 | 3283 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3284 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3285 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3286 | |
848e3e78 DE |
3287 | /* The rule is CUs specify all the files, including those used by |
3288 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3289 | |
b76e467d | 3290 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3291 | { |
3d7bb9d9 | 3292 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3293 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3294 | continue; |
3295 | ||
b76e467d | 3296 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3297 | if (file_data == NULL) |
9291a0cd TT |
3298 | continue; |
3299 | ||
b76e467d | 3300 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3301 | { |
7b9f3c50 | 3302 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3303 | const char *this_real_name; |
9291a0cd | 3304 | |
af529f8f | 3305 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3306 | { |
f5b95b50 | 3307 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3308 | callback)) |
3309 | return true; | |
288e77a7 | 3310 | continue; |
4aac40c8 | 3311 | } |
9291a0cd | 3312 | |
c011a4f4 DE |
3313 | /* Before we invoke realpath, which can get expensive when many |
3314 | files are involved, do a quick comparison of the basenames. */ | |
3315 | if (! basenames_may_differ | |
3316 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3317 | continue; | |
3318 | ||
da235a7c JK |
3319 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3320 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3321 | { |
da235a7c | 3322 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3323 | callback)) |
3324 | return true; | |
288e77a7 | 3325 | continue; |
da235a7c | 3326 | } |
9291a0cd | 3327 | |
da235a7c JK |
3328 | if (real_path != NULL) |
3329 | { | |
af529f8f JK |
3330 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3331 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3332 | if (this_real_name != NULL |
af529f8f | 3333 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3334 | { |
f5b95b50 | 3335 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3336 | callback)) |
3337 | return true; | |
288e77a7 | 3338 | continue; |
9291a0cd TT |
3339 | } |
3340 | } | |
3341 | } | |
3342 | } | |
3343 | ||
14bc53a8 | 3344 | return false; |
9291a0cd TT |
3345 | } |
3346 | ||
da51c347 DE |
3347 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3348 | ||
3349 | struct dw2_symtab_iterator | |
9291a0cd | 3350 | { |
ed2dc618 SM |
3351 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3352 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3353 | /* If set, only look for symbols that match that block. Valid values are |
3354 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3355 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3356 | /* The kind of symbol we're looking for. */ |
3357 | domain_enum domain; | |
3358 | /* The list of CUs from the index entry of the symbol, | |
3359 | or NULL if not found. */ | |
3360 | offset_type *vec; | |
3361 | /* The next element in VEC to look at. */ | |
3362 | int next; | |
3363 | /* The number of elements in VEC, or zero if there is no match. */ | |
3364 | int length; | |
8943b874 DE |
3365 | /* Have we seen a global version of the symbol? |
3366 | If so we can ignore all further global instances. | |
3367 | This is to work around gold/15646, inefficient gold-generated | |
3368 | indices. */ | |
3369 | int global_seen; | |
da51c347 | 3370 | }; |
9291a0cd | 3371 | |
2b79f376 | 3372 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3373 | |
9291a0cd | 3374 | static void |
da51c347 | 3375 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3376 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3377 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3378 | domain_enum domain, |
3379 | const char *name) | |
3380 | { | |
ed2dc618 | 3381 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3382 | iter->block_index = block_index; |
3383 | iter->domain = domain; | |
3384 | iter->next = 0; | |
8943b874 | 3385 | iter->global_seen = 0; |
da51c347 | 3386 | |
3063847f | 3387 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3388 | |
3389 | /* index is NULL if OBJF_READNOW. */ | |
3390 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3391 | iter->length = MAYBE_SWAP (*iter->vec); |
3392 | else | |
3393 | { | |
3394 | iter->vec = NULL; | |
3395 | iter->length = 0; | |
3396 | } | |
3397 | } | |
3398 | ||
3399 | /* Return the next matching CU or NULL if there are no more. */ | |
3400 | ||
3401 | static struct dwarf2_per_cu_data * | |
3402 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3403 | { | |
ed2dc618 SM |
3404 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3405 | ||
da51c347 DE |
3406 | for ( ; iter->next < iter->length; ++iter->next) |
3407 | { | |
3408 | offset_type cu_index_and_attrs = | |
3409 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3410 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3411 | gdb_index_symbol_kind symbol_kind = |
3412 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3413 | /* Only check the symbol attributes if they're present. | |
3414 | Indices prior to version 7 don't record them, | |
3415 | and indices >= 7 may elide them for certain symbols | |
3416 | (gold does this). */ | |
3417 | int attrs_valid = | |
ed2dc618 | 3418 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3419 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3420 | ||
3190f0c6 | 3421 | /* Don't crash on bad data. */ |
b76e467d | 3422 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3423 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3424 | { |
b98664d3 | 3425 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3426 | " [in module %s]"), |
3427 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3428 | continue; |
3429 | } | |
3430 | ||
ff4c9fec | 3431 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3432 | |
da51c347 | 3433 | /* Skip if already read in. */ |
43f3e411 | 3434 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3435 | continue; |
3436 | ||
8943b874 DE |
3437 | /* Check static vs global. */ |
3438 | if (attrs_valid) | |
3439 | { | |
2b79f376 SM |
3440 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3441 | ||
3442 | if (iter->block_index.has_value ()) | |
3443 | { | |
3444 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3445 | ||
3446 | if (is_static != want_static) | |
3447 | continue; | |
3448 | } | |
3449 | ||
8943b874 DE |
3450 | /* Work around gold/15646. */ |
3451 | if (!is_static && iter->global_seen) | |
3452 | continue; | |
3453 | if (!is_static) | |
3454 | iter->global_seen = 1; | |
3455 | } | |
da51c347 DE |
3456 | |
3457 | /* Only check the symbol's kind if it has one. */ | |
3458 | if (attrs_valid) | |
3459 | { | |
3460 | switch (iter->domain) | |
3461 | { | |
3462 | case VAR_DOMAIN: | |
3463 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3464 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3465 | /* Some types are also in VAR_DOMAIN. */ | |
3466 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3467 | continue; | |
3468 | break; | |
3469 | case STRUCT_DOMAIN: | |
3470 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3471 | continue; | |
3472 | break; | |
3473 | case LABEL_DOMAIN: | |
3474 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3475 | continue; | |
3476 | break; | |
59c35742 AB |
3477 | case MODULE_DOMAIN: |
3478 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3479 | continue; | |
3480 | break; | |
da51c347 DE |
3481 | default: |
3482 | break; | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | ++iter->next; | |
3487 | return per_cu; | |
3488 | } | |
3489 | ||
3490 | return NULL; | |
3491 | } | |
3492 | ||
43f3e411 | 3493 | static struct compunit_symtab * |
c7f839cb | 3494 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 3495 | const char *name, domain_enum domain) |
9291a0cd | 3496 | { |
43f3e411 | 3497 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
3498 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3499 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 3500 | |
b5ec771e PA |
3501 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3502 | ||
ed2dc618 SM |
3503 | struct dw2_symtab_iterator iter; |
3504 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3505 | |
2b79f376 | 3506 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 3507 | |
ed2dc618 SM |
3508 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
3509 | { | |
3510 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 3511 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 3512 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 3513 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3514 | |
ed2dc618 SM |
3515 | sym = block_find_symbol (block, name, domain, |
3516 | block_find_non_opaque_type_preferred, | |
3517 | &with_opaque); | |
b2e2f908 | 3518 | |
ed2dc618 SM |
3519 | /* Some caution must be observed with overloaded functions |
3520 | and methods, since the index will not contain any overload | |
3521 | information (but NAME might contain it). */ | |
da51c347 | 3522 | |
ed2dc618 SM |
3523 | if (sym != NULL |
3524 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
3525 | return stab; | |
3526 | if (with_opaque != NULL | |
3527 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
3528 | stab_best = stab; | |
da51c347 | 3529 | |
ed2dc618 | 3530 | /* Keep looking through other CUs. */ |
9291a0cd | 3531 | } |
9291a0cd | 3532 | |
da51c347 | 3533 | return stab_best; |
9291a0cd TT |
3534 | } |
3535 | ||
3536 | static void | |
3537 | dw2_print_stats (struct objfile *objfile) | |
3538 | { | |
ed2dc618 SM |
3539 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3540 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3541 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3542 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 3543 | int count = 0; |
9291a0cd | 3544 | |
ed2dc618 | 3545 | for (int i = 0; i < total; ++i) |
9291a0cd | 3546 | { |
ff4c9fec | 3547 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3548 | |
43f3e411 | 3549 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3550 | ++count; |
3551 | } | |
e4a48d9d | 3552 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3553 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3554 | } | |
3555 | ||
779bd270 DE |
3556 | /* This dumps minimal information about the index. |
3557 | It is called via "mt print objfiles". | |
3558 | One use is to verify .gdb_index has been loaded by the | |
3559 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3560 | ||
9291a0cd TT |
3561 | static void |
3562 | dw2_dump (struct objfile *objfile) | |
3563 | { | |
ed2dc618 SM |
3564 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3565 | = get_dwarf2_per_objfile (objfile); | |
3566 | ||
779bd270 DE |
3567 | gdb_assert (dwarf2_per_objfile->using_index); |
3568 | printf_filtered (".gdb_index:"); | |
3569 | if (dwarf2_per_objfile->index_table != NULL) | |
3570 | { | |
3571 | printf_filtered (" version %d\n", | |
3572 | dwarf2_per_objfile->index_table->version); | |
3573 | } | |
3574 | else | |
3575 | printf_filtered (" faked for \"readnow\"\n"); | |
3576 | printf_filtered ("\n"); | |
9291a0cd TT |
3577 | } |
3578 | ||
9291a0cd TT |
3579 | static void |
3580 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3581 | const char *func_name) | |
3582 | { | |
ed2dc618 SM |
3583 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3584 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 3585 | |
ed2dc618 SM |
3586 | struct dw2_symtab_iterator iter; |
3587 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3588 | |
2b79f376 | 3589 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 3590 | |
ed2dc618 | 3591 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 3592 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 3593 | |
9291a0cd TT |
3594 | } |
3595 | ||
3596 | static void | |
3597 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3598 | { | |
ed2dc618 SM |
3599 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3600 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3601 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3602 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 3603 | |
ed2dc618 | 3604 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3605 | { |
ff4c9fec | 3606 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3607 | |
58f0c718 TT |
3608 | /* We don't want to directly expand a partial CU, because if we |
3609 | read it with the wrong language, then assertion failures can | |
3610 | be triggered later on. See PR symtab/23010. So, tell | |
3611 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3612 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
3613 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
3614 | } |
3615 | } | |
3616 | ||
3617 | static void | |
652a8996 JK |
3618 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3619 | const char *fullname) | |
9291a0cd | 3620 | { |
ed2dc618 SM |
3621 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3622 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
3623 | |
3624 | /* We don't need to consider type units here. | |
3625 | This is only called for examining code, e.g. expand_line_sal. | |
3626 | There can be an order of magnitude (or more) more type units | |
3627 | than comp units, and we avoid them if we can. */ | |
3628 | ||
b76e467d | 3629 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3630 | { |
3d7bb9d9 | 3631 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3632 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3633 | continue; |
3634 | ||
b76e467d | 3635 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3636 | if (file_data == NULL) |
9291a0cd TT |
3637 | continue; |
3638 | ||
b76e467d | 3639 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3640 | { |
652a8996 JK |
3641 | const char *this_fullname = file_data->file_names[j]; |
3642 | ||
3643 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3644 | { |
58f0c718 | 3645 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
3646 | break; |
3647 | } | |
3648 | } | |
3649 | } | |
3650 | } | |
3651 | ||
9291a0cd | 3652 | static void |
199b4314 TT |
3653 | dw2_map_matching_symbols |
3654 | (struct objfile *objfile, | |
b054970d | 3655 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
3656 | int global, |
3657 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 3658 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3659 | { |
1aa98955 TV |
3660 | /* Used for Ada. */ |
3661 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
3662 | = get_dwarf2_per_objfile (objfile); | |
3663 | ||
3664 | if (dwarf2_per_objfile->index_table != nullptr) | |
3665 | { | |
3666 | /* Ada currently doesn't support .gdb_index (see PR24713). We can get | |
3667 | here though if the current language is Ada for a non-Ada objfile | |
3668 | using GNU index. As Ada does not look for non-Ada symbols this | |
3669 | function should just return. */ | |
3670 | return; | |
3671 | } | |
3672 | ||
3673 | /* We have -readnow: no .gdb_index, but no partial symtabs either. So, | |
3674 | inline psym_map_matching_symbols here, assuming all partial symtabs have | |
3675 | been read in. */ | |
3676 | const int block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
3677 | ||
3678 | for (compunit_symtab *cust : objfile->compunits ()) | |
3679 | { | |
3680 | const struct block *block; | |
3681 | ||
3682 | if (cust == NULL) | |
3683 | continue; | |
3684 | block = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
3685 | if (!iterate_over_symbols_terminated (block, name, | |
3686 | domain, callback)) | |
3687 | return; | |
3688 | } | |
9291a0cd TT |
3689 | } |
3690 | ||
e1ef7d7a PA |
3691 | /* Starting from a search name, return the string that finds the upper |
3692 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3693 | list. Returns the empty string to indicate that the upper bound is | |
3694 | the end of the list. */ | |
3695 | ||
3696 | static std::string | |
3697 | make_sort_after_prefix_name (const char *search_name) | |
3698 | { | |
3699 | /* When looking to complete "func", we find the upper bound of all | |
3700 | symbols that start with "func" by looking for where we'd insert | |
3701 | the closest string that would follow "func" in lexicographical | |
3702 | order. Usually, that's "func"-with-last-character-incremented, | |
3703 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3704 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3705 | Especially mind the 0xff character, which is a valid character in | |
3706 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3707 | rule out compilers allowing it in identifiers. Note that | |
3708 | conveniently, strcmp/strcasecmp are specified to compare | |
3709 | characters interpreted as unsigned char. So what we do is treat | |
3710 | the whole string as a base 256 number composed of a sequence of | |
3711 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3712 | to 0, and carries 1 to the following more-significant position. | |
3713 | If the very first character in SEARCH_NAME ends up incremented | |
3714 | and carries/overflows, then the upper bound is the end of the | |
3715 | list. The string after the empty string is also the empty | |
3716 | string. | |
3717 | ||
3718 | Some examples of this operation: | |
3719 | ||
3720 | SEARCH_NAME => "+1" RESULT | |
3721 | ||
3722 | "abc" => "abd" | |
3723 | "ab\xff" => "ac" | |
3724 | "\xff" "a" "\xff" => "\xff" "b" | |
3725 | "\xff" => "" | |
3726 | "\xff\xff" => "" | |
3727 | "" => "" | |
3728 | ||
3729 | Then, with these symbols for example: | |
3730 | ||
3731 | func | |
3732 | func1 | |
3733 | fund | |
3734 | ||
3735 | completing "func" looks for symbols between "func" and | |
3736 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3737 | which finds "func" and "func1", but not "fund". | |
3738 | ||
3739 | And with: | |
3740 | ||
3741 | funcÿ (Latin1 'ÿ' [0xff]) | |
3742 | funcÿ1 | |
3743 | fund | |
3744 | ||
3745 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3746 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3747 | ||
3748 | And with: | |
3749 | ||
3750 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3751 | ÿÿ1 | |
3752 | ||
3753 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3754 | the end of the list. | |
3755 | */ | |
3756 | std::string after = search_name; | |
3757 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3758 | after.pop_back (); | |
3759 | if (!after.empty ()) | |
3760 | after.back () = (unsigned char) after.back () + 1; | |
3761 | return after; | |
3762 | } | |
3763 | ||
5c58de74 | 3764 | /* See declaration. */ |
61d96d7e | 3765 | |
5c58de74 PA |
3766 | std::pair<std::vector<name_component>::const_iterator, |
3767 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3768 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 3769 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 3770 | { |
5c58de74 PA |
3771 | auto *name_cmp |
3772 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3773 | |
3b00ef10 | 3774 | const char *lang_name |
e0802d59 | 3775 | = lookup_name_without_params.language_lookup_name (lang); |
9291a0cd | 3776 | |
3f563c84 PA |
3777 | /* Comparison function object for lower_bound that matches against a |
3778 | given symbol name. */ | |
3779 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3780 | const char *name) | |
3781 | { | |
5c58de74 | 3782 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3783 | const char *elem_name = elem_qualified + elem.name_offset; |
3784 | return name_cmp (elem_name, name) < 0; | |
3785 | }; | |
3786 | ||
3787 | /* Comparison function object for upper_bound that matches against a | |
3788 | given symbol name. */ | |
3789 | auto lookup_compare_upper = [&] (const char *name, | |
3790 | const name_component &elem) | |
3791 | { | |
5c58de74 | 3792 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3793 | const char *elem_name = elem_qualified + elem.name_offset; |
3794 | return name_cmp (name, elem_name) < 0; | |
3795 | }; | |
3796 | ||
5c58de74 PA |
3797 | auto begin = this->name_components.begin (); |
3798 | auto end = this->name_components.end (); | |
3f563c84 PA |
3799 | |
3800 | /* Find the lower bound. */ | |
3801 | auto lower = [&] () | |
3802 | { | |
3b00ef10 | 3803 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3804 | return begin; |
3805 | else | |
3b00ef10 | 3806 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3807 | } (); |
3808 | ||
3809 | /* Find the upper bound. */ | |
3810 | auto upper = [&] () | |
3811 | { | |
5c58de74 | 3812 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3813 | { |
e1ef7d7a PA |
3814 | /* In completion mode, we want UPPER to point past all |
3815 | symbols names that have the same prefix. I.e., with | |
3816 | these symbols, and completing "func": | |
3817 | ||
3818 | function << lower bound | |
3819 | function1 | |
3820 | other_function << upper bound | |
3821 | ||
3822 | We find the upper bound by looking for the insertion | |
3823 | point of "func"-with-last-character-incremented, | |
3824 | i.e. "fund". */ | |
3b00ef10 | 3825 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3826 | if (after.empty ()) |
3f563c84 | 3827 | return end; |
e6b2f5ef PA |
3828 | return std::lower_bound (lower, end, after.c_str (), |
3829 | lookup_compare_lower); | |
3f563c84 PA |
3830 | } |
3831 | else | |
3b00ef10 | 3832 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3833 | } (); |
3834 | ||
5c58de74 PA |
3835 | return {lower, upper}; |
3836 | } | |
3837 | ||
3838 | /* See declaration. */ | |
3839 | ||
3840 | void | |
44ed8f3e | 3841 | mapped_index_base::build_name_components () |
5c58de74 PA |
3842 | { |
3843 | if (!this->name_components.empty ()) | |
3844 | return; | |
3845 | ||
3846 | this->name_components_casing = case_sensitivity; | |
3847 | auto *name_cmp | |
3848 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3849 | ||
3850 | /* The code below only knows how to break apart components of C++ | |
3851 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3852 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3853 | auto count = this->symbol_name_count (); |
3854 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3855 | { |
44ed8f3e | 3856 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3857 | continue; |
3858 | ||
3859 | const char *name = this->symbol_name_at (idx); | |
3860 | ||
3861 | /* Add each name component to the name component table. */ | |
3862 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3863 | |
3864 | if (strstr (name, "::") != nullptr) | |
3865 | { | |
3866 | for (unsigned int current_len = cp_find_first_component (name); | |
3867 | name[current_len] != '\0'; | |
3868 | current_len += cp_find_first_component (name + current_len)) | |
3869 | { | |
3870 | gdb_assert (name[current_len] == ':'); | |
3871 | this->name_components.push_back ({previous_len, idx}); | |
3872 | /* Skip the '::'. */ | |
3873 | current_len += 2; | |
3874 | previous_len = current_len; | |
3875 | } | |
3876 | } | |
3877 | else | |
5c58de74 | 3878 | { |
3b00ef10 TT |
3879 | /* Handle the Ada encoded (aka mangled) form here. */ |
3880 | for (const char *iter = strstr (name, "__"); | |
3881 | iter != nullptr; | |
3882 | iter = strstr (iter, "__")) | |
3883 | { | |
3884 | this->name_components.push_back ({previous_len, idx}); | |
3885 | iter += 2; | |
3886 | previous_len = iter - name; | |
3887 | } | |
5c58de74 | 3888 | } |
3b00ef10 | 3889 | |
5c58de74 PA |
3890 | this->name_components.push_back ({previous_len, idx}); |
3891 | } | |
3892 | ||
3893 | /* Sort name_components elements by name. */ | |
3894 | auto name_comp_compare = [&] (const name_component &left, | |
3895 | const name_component &right) | |
3896 | { | |
3897 | const char *left_qualified = this->symbol_name_at (left.idx); | |
3898 | const char *right_qualified = this->symbol_name_at (right.idx); | |
3899 | ||
3900 | const char *left_name = left_qualified + left.name_offset; | |
3901 | const char *right_name = right_qualified + right.name_offset; | |
3902 | ||
3903 | return name_cmp (left_name, right_name) < 0; | |
3904 | }; | |
3905 | ||
3906 | std::sort (this->name_components.begin (), | |
3907 | this->name_components.end (), | |
3908 | name_comp_compare); | |
3909 | } | |
3910 | ||
3911 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3912 | mapped_index_base instead of the containing objfile. This is split |
3913 | to a separate function in order to be able to unit test the | |
3914 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3915 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3916 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
3917 | |
3918 | static void | |
3919 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 3920 | (mapped_index_base &index, |
5c58de74 PA |
3921 | const lookup_name_info &lookup_name_in, |
3922 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
3923 | enum search_domain kind, | |
3b00ef10 | 3924 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
3925 | { |
3926 | lookup_name_info lookup_name_without_params | |
3927 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3928 | |
3929 | /* Build the symbol name component sorted vector, if we haven't | |
3930 | yet. */ | |
3931 | index.build_name_components (); | |
3932 | ||
3f563c84 PA |
3933 | /* The same symbol may appear more than once in the range though. |
3934 | E.g., if we're looking for symbols that complete "w", and we have | |
3935 | a symbol named "w1::w2", we'll find the two name components for | |
3936 | that same symbol in the range. To be sure we only call the | |
3937 | callback once per symbol, we first collect the symbol name | |
3938 | indexes that matched in a temporary vector and ignore | |
3939 | duplicates. */ | |
3940 | std::vector<offset_type> matches; | |
3f563c84 | 3941 | |
3b00ef10 TT |
3942 | struct name_and_matcher |
3943 | { | |
3944 | symbol_name_matcher_ftype *matcher; | |
ecc6c606 | 3945 | const char *name; |
3b00ef10 TT |
3946 | |
3947 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3948 | { |
ecc6c606 | 3949 | return matcher == other.matcher && strcmp (name, other.name) == 0; |
3b00ef10 TT |
3950 | } |
3951 | }; | |
3952 | ||
3953 | /* A vector holding all the different symbol name matchers, for all | |
3954 | languages. */ | |
3955 | std::vector<name_and_matcher> matchers; | |
3956 | ||
3957 | for (int i = 0; i < nr_languages; i++) | |
3958 | { | |
3959 | enum language lang_e = (enum language) i; | |
3960 | ||
3961 | const language_defn *lang = language_def (lang_e); | |
3962 | symbol_name_matcher_ftype *name_matcher | |
3963 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 3964 | |
3b00ef10 TT |
3965 | name_and_matcher key { |
3966 | name_matcher, | |
3967 | lookup_name_without_params.language_lookup_name (lang_e) | |
3968 | }; | |
3969 | ||
3970 | /* Don't insert the same comparison routine more than once. | |
3971 | Note that we do this linear walk. This is not a problem in | |
3972 | practice because the number of supported languages is | |
3973 | low. */ | |
3974 | if (std::find (matchers.begin (), matchers.end (), key) | |
3975 | != matchers.end ()) | |
9291a0cd | 3976 | continue; |
3b00ef10 TT |
3977 | matchers.push_back (std::move (key)); |
3978 | ||
3979 | auto bounds | |
3980 | = index.find_name_components_bounds (lookup_name_without_params, | |
3981 | lang_e); | |
3982 | ||
3983 | /* Now for each symbol name in range, check to see if we have a name | |
3984 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3985 | ||
3986 | for (; bounds.first != bounds.second; ++bounds.first) | |
3987 | { | |
3988 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
3989 | ||
3990 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3991 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3992 | continue; | |
9291a0cd | 3993 | |
3b00ef10 TT |
3994 | matches.push_back (bounds.first->idx); |
3995 | } | |
3f563c84 PA |
3996 | } |
3997 | ||
3998 | std::sort (matches.begin (), matches.end ()); | |
3999 | ||
4000 | /* Finally call the callback, once per match. */ | |
4001 | ULONGEST prev = -1; | |
4002 | for (offset_type idx : matches) | |
4003 | { | |
4004 | if (prev != idx) | |
4005 | { | |
3b00ef10 TT |
4006 | if (!match_callback (idx)) |
4007 | break; | |
3f563c84 PA |
4008 | prev = idx; |
4009 | } | |
4010 | } | |
4011 | ||
4012 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4013 | (offset_type)-1 are both possible values. */ | |
4014 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4015 | } | |
4016 | ||
c62446b1 PA |
4017 | #if GDB_SELF_TEST |
4018 | ||
4019 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4020 | ||
a3c5fafd PA |
4021 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4022 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4023 | mapped_index_base interface. Builds an index from the symbol list | |
4024 | passed as parameter to the constructor. */ | |
4025 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4026 | { |
4027 | public: | |
a3c5fafd PA |
4028 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4029 | : m_symbol_table (symbols) | |
c62446b1 PA |
4030 | {} |
4031 | ||
a3c5fafd | 4032 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4033 | |
a3c5fafd | 4034 | /* Return the number of names in the symbol table. */ |
632e107b | 4035 | size_t symbol_name_count () const override |
c62446b1 | 4036 | { |
a3c5fafd | 4037 | return m_symbol_table.size (); |
c62446b1 PA |
4038 | } |
4039 | ||
a3c5fafd | 4040 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4041 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4042 | { |
4043 | return m_symbol_table[idx]; | |
4044 | } | |
c62446b1 | 4045 | |
a3c5fafd PA |
4046 | private: |
4047 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4048 | }; |
4049 | ||
4050 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4051 | string, to pass to print routines. */ | |
4052 | ||
4053 | static const char * | |
4054 | string_or_null (const char *str) | |
4055 | { | |
4056 | return str != NULL ? str : "<null>"; | |
4057 | } | |
4058 | ||
4059 | /* Check if a lookup_name_info built from | |
4060 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4061 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4062 | matching order. If no match expected, then an empty list is | |
4063 | specified. Returns true on success. On failure prints a warning | |
4064 | indicating the file:line that failed, and returns false. */ | |
4065 | ||
4066 | static bool | |
4067 | check_match (const char *file, int line, | |
4068 | mock_mapped_index &mock_index, | |
4069 | const char *name, symbol_name_match_type match_type, | |
4070 | bool completion_mode, | |
4071 | std::initializer_list<const char *> expected_list) | |
4072 | { | |
4073 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4074 | ||
4075 | bool matched = true; | |
4076 | ||
4077 | auto mismatch = [&] (const char *expected_str, | |
4078 | const char *got) | |
4079 | { | |
4080 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4081 | "expected=\"%s\", got=\"%s\"\n"), | |
4082 | file, line, | |
4083 | (match_type == symbol_name_match_type::FULL | |
4084 | ? "FULL" : "WILD"), | |
4085 | name, string_or_null (expected_str), string_or_null (got)); | |
4086 | matched = false; | |
4087 | }; | |
4088 | ||
4089 | auto expected_it = expected_list.begin (); | |
4090 | auto expected_end = expected_list.end (); | |
4091 | ||
a3c5fafd | 4092 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4093 | NULL, ALL_DOMAIN, |
4094 | [&] (offset_type idx) | |
4095 | { | |
a3c5fafd | 4096 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4097 | const char *expected_str |
4098 | = expected_it == expected_end ? NULL : *expected_it++; | |
4099 | ||
4100 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4101 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4102 | return true; |
c62446b1 PA |
4103 | }); |
4104 | ||
4105 | const char *expected_str | |
4106 | = expected_it == expected_end ? NULL : *expected_it++; | |
4107 | if (expected_str != NULL) | |
4108 | mismatch (expected_str, NULL); | |
4109 | ||
4110 | return matched; | |
4111 | } | |
4112 | ||
4113 | /* The symbols added to the mock mapped_index for testing (in | |
4114 | canonical form). */ | |
4115 | static const char *test_symbols[] = { | |
4116 | "function", | |
4117 | "std::bar", | |
4118 | "std::zfunction", | |
4119 | "std::zfunction2", | |
4120 | "w1::w2", | |
4121 | "ns::foo<char*>", | |
4122 | "ns::foo<int>", | |
4123 | "ns::foo<long>", | |
a20714ff PA |
4124 | "ns2::tmpl<int>::foo2", |
4125 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4126 | |
e1ef7d7a PA |
4127 | /* These are used to check that the increment-last-char in the |
4128 | matching algorithm for completion doesn't match "t1_fund" when | |
4129 | completing "t1_func". */ | |
4130 | "t1_func", | |
4131 | "t1_func1", | |
4132 | "t1_fund", | |
4133 | "t1_fund1", | |
4134 | ||
4135 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4136 | cp-name-parser understands this as a single identifier ("função" | |
4137 | is "function" in PT). */ | |
4138 | u8"u8função", | |
4139 | ||
4140 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4141 | "yfunc\377", | |
4142 | ||
4143 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4144 | "\377", | |
4145 | "\377\377123", | |
4146 | ||
c62446b1 PA |
4147 | /* A name with all sorts of complications. Starts with "z" to make |
4148 | it easier for the completion tests below. */ | |
4149 | #define Z_SYM_NAME \ | |
4150 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4151 | "::tuple<(anonymous namespace)::ui*, " \ | |
4152 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4153 | ||
4154 | Z_SYM_NAME | |
4155 | }; | |
4156 | ||
a3c5fafd PA |
4157 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4158 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4159 | in completion mode. */ | |
5c58de74 PA |
4160 | |
4161 | static bool | |
a3c5fafd | 4162 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4163 | const char *search_name, |
4164 | gdb::array_view<const char *> expected_syms) | |
4165 | { | |
4166 | lookup_name_info lookup_name (search_name, | |
4167 | symbol_name_match_type::FULL, true); | |
4168 | ||
3b00ef10 TT |
4169 | auto bounds = index.find_name_components_bounds (lookup_name, |
4170 | language_cplus); | |
5c58de74 PA |
4171 | |
4172 | size_t distance = std::distance (bounds.first, bounds.second); | |
4173 | if (distance != expected_syms.size ()) | |
4174 | return false; | |
4175 | ||
4176 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4177 | { | |
4178 | auto nc_elem = bounds.first + exp_elem; | |
4179 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4180 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4181 | return false; | |
4182 | } | |
4183 | ||
4184 | return true; | |
4185 | } | |
4186 | ||
4187 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4188 | method. */ | |
4189 | ||
c62446b1 | 4190 | static void |
5c58de74 PA |
4191 | test_mapped_index_find_name_component_bounds () |
4192 | { | |
4193 | mock_mapped_index mock_index (test_symbols); | |
4194 | ||
a3c5fafd | 4195 | mock_index.build_name_components (); |
5c58de74 PA |
4196 | |
4197 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4198 | method in completion mode. */ | |
4199 | { | |
4200 | static const char *expected_syms[] = { | |
4201 | "t1_func", | |
4202 | "t1_func1", | |
5c58de74 PA |
4203 | }; |
4204 | ||
a3c5fafd | 4205 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4206 | "t1_func", expected_syms)); |
4207 | } | |
4208 | ||
4209 | /* Check that the increment-last-char in the name matching algorithm | |
4210 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4211 | { | |
4212 | static const char *expected_syms1[] = { | |
4213 | "\377", | |
4214 | "\377\377123", | |
4215 | }; | |
a3c5fafd | 4216 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4217 | "\377", expected_syms1)); |
4218 | ||
4219 | static const char *expected_syms2[] = { | |
4220 | "\377\377123", | |
4221 | }; | |
a3c5fafd | 4222 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4223 | "\377\377", expected_syms2)); |
4224 | } | |
4225 | } | |
4226 | ||
4227 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4228 | ||
4229 | static void | |
4230 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4231 | { |
4232 | mock_mapped_index mock_index (test_symbols); | |
4233 | ||
4234 | /* We let all tests run until the end even if some fails, for debug | |
4235 | convenience. */ | |
4236 | bool any_mismatch = false; | |
4237 | ||
4238 | /* Create the expected symbols list (an initializer_list). Needed | |
4239 | because lists have commas, and we need to pass them to CHECK, | |
4240 | which is a macro. */ | |
4241 | #define EXPECT(...) { __VA_ARGS__ } | |
4242 | ||
4243 | /* Wrapper for check_match that passes down the current | |
4244 | __FILE__/__LINE__. */ | |
4245 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4246 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4247 | mock_index, \ | |
4248 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4249 | EXPECTED_LIST) | |
4250 | ||
4251 | /* Identity checks. */ | |
4252 | for (const char *sym : test_symbols) | |
4253 | { | |
4254 | /* Should be able to match all existing symbols. */ | |
4255 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4256 | EXPECT (sym)); | |
4257 | ||
4258 | /* Should be able to match all existing symbols with | |
4259 | parameters. */ | |
4260 | std::string with_params = std::string (sym) + "(int)"; | |
4261 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4262 | EXPECT (sym)); | |
4263 | ||
4264 | /* Should be able to match all existing symbols with | |
4265 | parameters and qualifiers. */ | |
4266 | with_params = std::string (sym) + " ( int ) const"; | |
4267 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4268 | EXPECT (sym)); | |
4269 | ||
4270 | /* This should really find sym, but cp-name-parser.y doesn't | |
4271 | know about lvalue/rvalue qualifiers yet. */ | |
4272 | with_params = std::string (sym) + " ( int ) &&"; | |
4273 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4274 | {}); | |
4275 | } | |
4276 | ||
e1ef7d7a PA |
4277 | /* Check that the name matching algorithm for completion doesn't get |
4278 | confused with Latin1 'ÿ' / 0xff. */ | |
4279 | { | |
4280 | static const char str[] = "\377"; | |
4281 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4282 | EXPECT ("\377", "\377\377123")); | |
4283 | } | |
4284 | ||
4285 | /* Check that the increment-last-char in the matching algorithm for | |
4286 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4287 | { | |
4288 | static const char str[] = "t1_func"; | |
4289 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4290 | EXPECT ("t1_func", "t1_func1")); | |
4291 | } | |
4292 | ||
c62446b1 PA |
4293 | /* Check that completion mode works at each prefix of the expected |
4294 | symbol name. */ | |
4295 | { | |
4296 | static const char str[] = "function(int)"; | |
4297 | size_t len = strlen (str); | |
4298 | std::string lookup; | |
4299 | ||
4300 | for (size_t i = 1; i < len; i++) | |
4301 | { | |
4302 | lookup.assign (str, i); | |
4303 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4304 | EXPECT ("function")); | |
4305 | } | |
4306 | } | |
4307 | ||
4308 | /* While "w" is a prefix of both components, the match function | |
4309 | should still only be called once. */ | |
4310 | { | |
4311 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4312 | EXPECT ("w1::w2")); | |
a20714ff PA |
4313 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4314 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4315 | } |
4316 | ||
4317 | /* Same, with a "complicated" symbol. */ | |
4318 | { | |
4319 | static const char str[] = Z_SYM_NAME; | |
4320 | size_t len = strlen (str); | |
4321 | std::string lookup; | |
4322 | ||
4323 | for (size_t i = 1; i < len; i++) | |
4324 | { | |
4325 | lookup.assign (str, i); | |
4326 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4327 | EXPECT (Z_SYM_NAME)); | |
4328 | } | |
4329 | } | |
4330 | ||
4331 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4332 | { | |
4333 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4334 | {}); | |
4335 | } | |
4336 | ||
4337 | /* A complete symbol with parameters matches any overload, since the | |
4338 | index has no overload info. */ | |
4339 | { | |
4340 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4341 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4342 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4343 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4344 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4345 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4346 | } |
4347 | ||
4348 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4349 | template argument list. */ | |
4350 | { | |
4351 | static const char expected[] = "ns::foo<int>"; | |
4352 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4353 | EXPECT (expected)); | |
a20714ff PA |
4354 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4355 | EXPECT (expected)); | |
c62446b1 PA |
4356 | } |
4357 | ||
4358 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4359 | template argument list that includes a pointer. */ | |
4360 | { | |
4361 | static const char expected[] = "ns::foo<char*>"; | |
4362 | /* Try both completion and non-completion modes. */ | |
4363 | static const bool completion_mode[2] = {false, true}; | |
4364 | for (size_t i = 0; i < 2; i++) | |
4365 | { | |
4366 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4367 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4368 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4369 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4370 | |
4371 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4372 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4373 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4374 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4375 | } |
4376 | } | |
4377 | ||
4378 | { | |
4379 | /* Check method qualifiers are ignored. */ | |
4380 | static const char expected[] = "ns::foo<char*>"; | |
4381 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4382 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4383 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4384 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4385 | CHECK_MATCH ("foo < char * > ( int ) const", |
4386 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4387 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4388 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4389 | } |
4390 | ||
4391 | /* Test lookup names that don't match anything. */ | |
4392 | { | |
a20714ff PA |
4393 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4394 | {}); | |
4395 | ||
c62446b1 PA |
4396 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4397 | {}); | |
4398 | } | |
4399 | ||
a20714ff PA |
4400 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4401 | which should not be confused with a parameter list. */ | |
4402 | { | |
4403 | static const char *syms[] = { | |
4404 | "A::B::C", | |
4405 | "B::C", | |
4406 | "C", | |
4407 | "A :: B :: C ( int )", | |
4408 | "B :: C ( int )", | |
4409 | "C ( int )", | |
4410 | }; | |
4411 | ||
4412 | for (const char *s : syms) | |
4413 | { | |
4414 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4415 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4416 | } | |
4417 | } | |
4418 | ||
4419 | { | |
4420 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4421 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4422 | EXPECT (expected)); | |
4423 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4424 | EXPECT (expected)); | |
4425 | } | |
4426 | ||
c62446b1 PA |
4427 | SELF_CHECK (!any_mismatch); |
4428 | ||
4429 | #undef EXPECT | |
4430 | #undef CHECK_MATCH | |
4431 | } | |
4432 | ||
5c58de74 PA |
4433 | static void |
4434 | run_test () | |
4435 | { | |
4436 | test_mapped_index_find_name_component_bounds (); | |
4437 | test_dw2_expand_symtabs_matching_symbol (); | |
4438 | } | |
4439 | ||
c62446b1 PA |
4440 | }} // namespace selftests::dw2_expand_symtabs_matching |
4441 | ||
4442 | #endif /* GDB_SELF_TEST */ | |
4443 | ||
4b514bc8 JK |
4444 | /* If FILE_MATCHER is NULL or if PER_CU has |
4445 | dwarf2_per_cu_quick_data::MARK set (see | |
4446 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4447 | EXPANSION_NOTIFY on it. */ | |
4448 | ||
4449 | static void | |
4450 | dw2_expand_symtabs_matching_one | |
4451 | (struct dwarf2_per_cu_data *per_cu, | |
4452 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4453 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4454 | { | |
4455 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4456 | { | |
4457 | bool symtab_was_null | |
4458 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4459 | ||
58f0c718 | 4460 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4461 | |
4462 | if (expansion_notify != NULL | |
4463 | && symtab_was_null | |
4464 | && per_cu->v.quick->compunit_symtab != NULL) | |
4465 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4466 | } | |
4467 | } | |
4468 | ||
3f563c84 PA |
4469 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4470 | matched, to expand corresponding CUs that were marked. IDX is the | |
4471 | index of the symbol name that matched. */ | |
4472 | ||
4473 | static void | |
4474 | dw2_expand_marked_cus | |
ed2dc618 | 4475 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
4476 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4477 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4478 | search_domain kind) | |
4479 | { | |
3f563c84 PA |
4480 | offset_type *vec, vec_len, vec_idx; |
4481 | bool global_seen = false; | |
ed2dc618 | 4482 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 4483 | |
61920122 | 4484 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 4485 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
4486 | vec_len = MAYBE_SWAP (vec[0]); |
4487 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4488 | { | |
61920122 PA |
4489 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
4490 | /* This value is only valid for index versions >= 7. */ | |
4491 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4492 | gdb_index_symbol_kind symbol_kind = | |
4493 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4494 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4495 | /* Only check the symbol attributes if they're present. | |
4496 | Indices prior to version 7 don't record them, | |
4497 | and indices >= 7 may elide them for certain symbols | |
4498 | (gold does this). */ | |
4499 | int attrs_valid = | |
4500 | (index.version >= 7 | |
4501 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4502 | ||
4503 | /* Work around gold/15646. */ | |
4504 | if (attrs_valid) | |
9291a0cd | 4505 | { |
61920122 PA |
4506 | if (!is_static && global_seen) |
4507 | continue; | |
4508 | if (!is_static) | |
4509 | global_seen = true; | |
4510 | } | |
3190f0c6 | 4511 | |
61920122 PA |
4512 | /* Only check the symbol's kind if it has one. */ |
4513 | if (attrs_valid) | |
4514 | { | |
4515 | switch (kind) | |
8943b874 | 4516 | { |
61920122 PA |
4517 | case VARIABLES_DOMAIN: |
4518 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4519 | continue; | |
4520 | break; | |
4521 | case FUNCTIONS_DOMAIN: | |
4522 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4523 | continue; |
61920122 PA |
4524 | break; |
4525 | case TYPES_DOMAIN: | |
4526 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4527 | continue; | |
4528 | break; | |
59c35742 AB |
4529 | case MODULES_DOMAIN: |
4530 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4531 | continue; | |
4532 | break; | |
61920122 PA |
4533 | default: |
4534 | break; | |
8943b874 | 4535 | } |
61920122 | 4536 | } |
8943b874 | 4537 | |
61920122 | 4538 | /* Don't crash on bad data. */ |
b76e467d | 4539 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4540 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 4541 | { |
b98664d3 | 4542 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
4543 | " [in module %s]"), |
4544 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
4545 | continue; |
4546 | } | |
4547 | ||
ff4c9fec | 4548 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
4549 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
4550 | expansion_notify); | |
61920122 PA |
4551 | } |
4552 | } | |
4553 | ||
4b514bc8 JK |
4554 | /* If FILE_MATCHER is non-NULL, set all the |
4555 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4556 | that match FILE_MATCHER. */ | |
4557 | ||
61920122 | 4558 | static void |
4b514bc8 | 4559 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
4560 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4561 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 4562 | { |
4b514bc8 | 4563 | if (file_matcher == NULL) |
61920122 PA |
4564 | return; |
4565 | ||
4b514bc8 JK |
4566 | objfile *const objfile = dwarf2_per_objfile->objfile; |
4567 | ||
4568 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4569 | htab_eq_pointer, | |
4570 | NULL, xcalloc, xfree)); | |
4571 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4572 | htab_eq_pointer, |
4573 | NULL, xcalloc, xfree)); | |
61920122 | 4574 | |
4b514bc8 JK |
4575 | /* The rule is CUs specify all the files, including those used by |
4576 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4577 | |
b76e467d | 4578 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4579 | { |
927aa2e7 JK |
4580 | QUIT; |
4581 | ||
4582 | per_cu->v.quick->mark = 0; | |
4583 | ||
4584 | /* We only need to look at symtabs not already expanded. */ | |
4585 | if (per_cu->v.quick->compunit_symtab) | |
4586 | continue; | |
4587 | ||
b76e467d | 4588 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4589 | if (file_data == NULL) |
4590 | continue; | |
4591 | ||
4592 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4593 | continue; | |
4594 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4595 | { | |
4596 | per_cu->v.quick->mark = 1; | |
4597 | continue; | |
4598 | } | |
4599 | ||
b76e467d | 4600 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4601 | { |
4602 | const char *this_real_name; | |
4603 | ||
4604 | if (file_matcher (file_data->file_names[j], false)) | |
4605 | { | |
4606 | per_cu->v.quick->mark = 1; | |
4607 | break; | |
4608 | } | |
4609 | ||
4610 | /* Before we invoke realpath, which can get expensive when many | |
4611 | files are involved, do a quick comparison of the basenames. */ | |
4612 | if (!basenames_may_differ | |
4613 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4614 | true)) | |
4615 | continue; | |
4616 | ||
4617 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4618 | if (file_matcher (this_real_name, false)) | |
4619 | { | |
4620 | per_cu->v.quick->mark = 1; | |
4621 | break; | |
4622 | } | |
4623 | } | |
4624 | ||
b76e467d SM |
4625 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4626 | ? visited_found.get () | |
4627 | : visited_not_found.get (), | |
4628 | file_data, INSERT); | |
927aa2e7 JK |
4629 | *slot = file_data; |
4630 | } | |
4631 | } | |
4632 | ||
4633 | static void | |
4634 | dw2_expand_symtabs_matching | |
4635 | (struct objfile *objfile, | |
4636 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
c1a66c06 | 4637 | const lookup_name_info *lookup_name, |
927aa2e7 JK |
4638 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
4639 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4640 | enum search_domain kind) | |
4641 | { | |
ed2dc618 SM |
4642 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4643 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4644 | |
4645 | /* index_table is NULL if OBJF_READNOW. */ | |
4646 | if (!dwarf2_per_objfile->index_table) | |
4647 | return; | |
4648 | ||
ed2dc618 | 4649 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 | 4650 | |
c1a66c06 TV |
4651 | if (symbol_matcher == NULL && lookup_name == NULL) |
4652 | { | |
4653 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
4654 | { | |
4655 | QUIT; | |
4656 | ||
4657 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
4658 | expansion_notify); | |
4659 | } | |
4660 | return; | |
4661 | } | |
4662 | ||
927aa2e7 JK |
4663 | mapped_index &index = *dwarf2_per_objfile->index_table; |
4664 | ||
c1a66c06 | 4665 | dw2_expand_symtabs_matching_symbol (index, *lookup_name, |
927aa2e7 JK |
4666 | symbol_matcher, |
4667 | kind, [&] (offset_type idx) | |
4668 | { | |
ed2dc618 | 4669 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 4670 | expansion_notify, kind); |
3b00ef10 | 4671 | return true; |
927aa2e7 JK |
4672 | }); |
4673 | } | |
4674 | ||
4675 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4676 | symtab. */ | |
4677 | ||
4678 | static struct compunit_symtab * | |
4679 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4680 | CORE_ADDR pc) | |
4681 | { | |
4682 | int i; | |
4683 | ||
4684 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4685 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4686 | return cust; | |
4687 | ||
4688 | if (cust->includes == NULL) | |
4689 | return NULL; | |
4690 | ||
4691 | for (i = 0; cust->includes[i]; ++i) | |
4692 | { | |
4693 | struct compunit_symtab *s = cust->includes[i]; | |
4694 | ||
4695 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4696 | if (s != NULL) | |
4697 | return s; | |
4698 | } | |
4699 | ||
4700 | return NULL; | |
4701 | } | |
4702 | ||
4703 | static struct compunit_symtab * | |
4704 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4705 | struct bound_minimal_symbol msymbol, | |
4706 | CORE_ADDR pc, | |
4707 | struct obj_section *section, | |
4708 | int warn_if_readin) | |
4709 | { | |
4710 | struct dwarf2_per_cu_data *data; | |
4711 | struct compunit_symtab *result; | |
4712 | ||
d320c2b5 | 4713 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
4714 | return NULL; |
4715 | ||
b3b3bada | 4716 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
d320c2b5 TT |
4717 | data = (struct dwarf2_per_cu_data *) addrmap_find |
4718 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
4719 | if (!data) |
4720 | return NULL; | |
4721 | ||
4722 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
4723 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
08feed99 | 4724 | paddress (objfile->arch (), pc)); |
927aa2e7 JK |
4725 | |
4726 | result | |
58f0c718 TT |
4727 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
4728 | false), | |
927aa2e7 JK |
4729 | pc); |
4730 | gdb_assert (result != NULL); | |
4731 | return result; | |
4732 | } | |
4733 | ||
4734 | static void | |
4735 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
4736 | void *data, int need_fullname) | |
4737 | { | |
ed2dc618 SM |
4738 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4739 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4740 | |
4741 | if (!dwarf2_per_objfile->filenames_cache) | |
4742 | { | |
4743 | dwarf2_per_objfile->filenames_cache.emplace (); | |
4744 | ||
4745 | htab_up visited (htab_create_alloc (10, | |
4746 | htab_hash_pointer, htab_eq_pointer, | |
4747 | NULL, xcalloc, xfree)); | |
4748 | ||
4749 | /* The rule is CUs specify all the files, including those used | |
4750 | by any TU, so there's no need to scan TUs here. We can | |
4751 | ignore file names coming from already-expanded CUs. */ | |
4752 | ||
b76e467d | 4753 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4754 | { |
927aa2e7 JK |
4755 | if (per_cu->v.quick->compunit_symtab) |
4756 | { | |
4757 | void **slot = htab_find_slot (visited.get (), | |
4758 | per_cu->v.quick->file_names, | |
4759 | INSERT); | |
4760 | ||
4761 | *slot = per_cu->v.quick->file_names; | |
4762 | } | |
4763 | } | |
4764 | ||
b76e467d | 4765 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4766 | { |
927aa2e7 JK |
4767 | /* We only need to look at symtabs not already expanded. */ |
4768 | if (per_cu->v.quick->compunit_symtab) | |
4769 | continue; | |
4770 | ||
b76e467d | 4771 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4772 | if (file_data == NULL) |
4773 | continue; | |
4774 | ||
b76e467d | 4775 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
4776 | if (*slot) |
4777 | { | |
4778 | /* Already visited. */ | |
4779 | continue; | |
4780 | } | |
4781 | *slot = file_data; | |
4782 | ||
4783 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4784 | { | |
4785 | const char *filename = file_data->file_names[j]; | |
4786 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4787 | } | |
4788 | } | |
4789 | } | |
4790 | ||
4791 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4792 | { | |
4793 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4794 | ||
4795 | if (need_fullname) | |
4796 | this_real_name = gdb_realpath (filename); | |
4797 | (*fun) (filename, this_real_name.get (), data); | |
4798 | }); | |
4799 | } | |
4800 | ||
4801 | static int | |
4802 | dw2_has_symbols (struct objfile *objfile) | |
4803 | { | |
4804 | return 1; | |
4805 | } | |
4806 | ||
4807 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4808 | { | |
4809 | dw2_has_symbols, | |
4810 | dw2_find_last_source_symtab, | |
4811 | dw2_forget_cached_source_info, | |
4812 | dw2_map_symtabs_matching_filename, | |
4813 | dw2_lookup_symbol, | |
d3214198 | 4814 | NULL, |
927aa2e7 JK |
4815 | dw2_print_stats, |
4816 | dw2_dump, | |
927aa2e7 JK |
4817 | dw2_expand_symtabs_for_function, |
4818 | dw2_expand_all_symtabs, | |
4819 | dw2_expand_symtabs_with_fullname, | |
4820 | dw2_map_matching_symbols, | |
4821 | dw2_expand_symtabs_matching, | |
4822 | dw2_find_pc_sect_compunit_symtab, | |
4823 | NULL, | |
4824 | dw2_map_symbol_filenames | |
4825 | }; | |
4826 | ||
4827 | /* DWARF-5 debug_names reader. */ | |
4828 | ||
4829 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4830 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4831 | ||
4832 | /* A helper function that reads the .debug_names section in SECTION | |
4833 | and fills in MAP. FILENAME is the name of the file containing the | |
4834 | section; it is used for error reporting. | |
4835 | ||
4836 | Returns true if all went well, false otherwise. */ | |
4837 | ||
4838 | static bool | |
4839 | read_debug_names_from_section (struct objfile *objfile, | |
4840 | const char *filename, | |
4841 | struct dwarf2_section_info *section, | |
4842 | mapped_debug_names &map) | |
4843 | { | |
96b79293 | 4844 | if (section->empty ()) |
927aa2e7 JK |
4845 | return false; |
4846 | ||
4847 | /* Older elfutils strip versions could keep the section in the main | |
4848 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4849 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4850 | return false; |
4851 | ||
96b79293 | 4852 | section->read (objfile); |
927aa2e7 | 4853 | |
08feed99 | 4854 | map.dwarf5_byte_order = gdbarch_byte_order (objfile->arch ()); |
927aa2e7 JK |
4855 | |
4856 | const gdb_byte *addr = section->buffer; | |
4857 | ||
96b79293 | 4858 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4859 | |
4860 | unsigned int bytes_read; | |
4861 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4862 | addr += bytes_read; | |
4863 | ||
4864 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4865 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4866 | if (bytes_read + length != section->size) | |
4867 | { | |
4868 | /* There may be multiple per-CU indices. */ | |
4869 | warning (_("Section .debug_names in %s length %s does not match " | |
4870 | "section length %s, ignoring .debug_names."), | |
4871 | filename, plongest (bytes_read + length), | |
4872 | pulongest (section->size)); | |
4873 | return false; | |
4874 | } | |
4875 | ||
4876 | /* The version number. */ | |
4877 | uint16_t version = read_2_bytes (abfd, addr); | |
4878 | addr += 2; | |
4879 | if (version != 5) | |
4880 | { | |
4881 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4882 | "ignoring .debug_names."), | |
4883 | filename, version); | |
4884 | return false; | |
4885 | } | |
4886 | ||
4887 | /* Padding. */ | |
4888 | uint16_t padding = read_2_bytes (abfd, addr); | |
4889 | addr += 2; | |
4890 | if (padding != 0) | |
4891 | { | |
4892 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4893 | "ignoring .debug_names."), | |
4894 | filename, padding); | |
4895 | return false; | |
4896 | } | |
4897 | ||
4898 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4899 | map.cu_count = read_4_bytes (abfd, addr); | |
4900 | addr += 4; | |
4901 | ||
4902 | /* local_type_unit_count - The number of TUs in the local TU | |
4903 | list. */ | |
4904 | map.tu_count = read_4_bytes (abfd, addr); | |
4905 | addr += 4; | |
4906 | ||
4907 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4908 | list. */ | |
4909 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4910 | addr += 4; | |
4911 | if (foreign_tu_count != 0) | |
4912 | { | |
4913 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4914 | "ignoring .debug_names."), | |
4915 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4916 | return false; | |
4917 | } | |
4918 | ||
4919 | /* bucket_count - The number of hash buckets in the hash lookup | |
4920 | table. */ | |
4921 | map.bucket_count = read_4_bytes (abfd, addr); | |
4922 | addr += 4; | |
4923 | ||
4924 | /* name_count - The number of unique names in the index. */ | |
4925 | map.name_count = read_4_bytes (abfd, addr); | |
4926 | addr += 4; | |
4927 | ||
4928 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4929 | table. */ | |
4930 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4931 | addr += 4; | |
4932 | ||
4933 | /* augmentation_string_size - The size in bytes of the augmentation | |
4934 | string. This value is rounded up to a multiple of 4. */ | |
4935 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4936 | addr += 4; | |
4937 | map.augmentation_is_gdb = ((augmentation_string_size | |
4938 | == sizeof (dwarf5_augmentation)) | |
4939 | && memcmp (addr, dwarf5_augmentation, | |
4940 | sizeof (dwarf5_augmentation)) == 0); | |
4941 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4942 | addr += augmentation_string_size; | |
4943 | ||
4944 | /* List of CUs */ | |
4945 | map.cu_table_reordered = addr; | |
4946 | addr += map.cu_count * map.offset_size; | |
4947 | ||
4948 | /* List of Local TUs */ | |
4949 | map.tu_table_reordered = addr; | |
4950 | addr += map.tu_count * map.offset_size; | |
4951 | ||
4952 | /* Hash Lookup Table */ | |
4953 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4954 | addr += map.bucket_count * 4; | |
4955 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4956 | addr += map.name_count * 4; | |
4957 | ||
4958 | /* Name Table */ | |
4959 | map.name_table_string_offs_reordered = addr; | |
4960 | addr += map.name_count * map.offset_size; | |
4961 | map.name_table_entry_offs_reordered = addr; | |
4962 | addr += map.name_count * map.offset_size; | |
4963 | ||
4964 | const gdb_byte *abbrev_table_start = addr; | |
4965 | for (;;) | |
4966 | { | |
927aa2e7 JK |
4967 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4968 | addr += bytes_read; | |
4969 | if (index_num == 0) | |
4970 | break; | |
4971 | ||
4972 | const auto insertpair | |
4973 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4974 | if (!insertpair.second) | |
4975 | { | |
4976 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4977 | "ignoring .debug_names."), | |
4978 | filename, pulongest (index_num)); | |
4979 | return false; | |
4980 | } | |
4981 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4982 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4983 | addr += bytes_read; | |
4984 | ||
4985 | for (;;) | |
4986 | { | |
4987 | mapped_debug_names::index_val::attr attr; | |
4988 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4989 | addr += bytes_read; | |
4990 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4991 | addr += bytes_read; | |
4992 | if (attr.form == DW_FORM_implicit_const) | |
4993 | { | |
4994 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4995 | &bytes_read); | |
4996 | addr += bytes_read; | |
4997 | } | |
4998 | if (attr.dw_idx == 0 && attr.form == 0) | |
4999 | break; | |
5000 | indexval.attr_vec.push_back (std::move (attr)); | |
5001 | } | |
5002 | } | |
5003 | if (addr != abbrev_table_start + abbrev_table_size) | |
5004 | { | |
5005 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
5006 | "of size %s vs. written as %u, ignoring .debug_names."), |
5007 | filename, plongest (addr - abbrev_table_start), | |
5008 | abbrev_table_size); | |
927aa2e7 JK |
5009 | return false; |
5010 | } | |
5011 | map.entry_pool = addr; | |
5012 | ||
5013 | return true; | |
5014 | } | |
5015 | ||
5016 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5017 | list. */ | |
5018 | ||
5019 | static void | |
ed2dc618 | 5020 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5021 | const mapped_debug_names &map, |
5022 | dwarf2_section_info §ion, | |
b76e467d | 5023 | bool is_dwz) |
927aa2e7 | 5024 | { |
3ee6bb11 TV |
5025 | if (!map.augmentation_is_gdb) |
5026 | { | |
5027 | for (uint32_t i = 0; i < map.cu_count; ++i) | |
5028 | { | |
5029 | sect_offset sect_off | |
5030 | = (sect_offset) (extract_unsigned_integer | |
5031 | (map.cu_table_reordered + i * map.offset_size, | |
5032 | map.offset_size, | |
5033 | map.dwarf5_byte_order)); | |
5034 | /* We don't know the length of the CU, because the CU list in a | |
5035 | .debug_names index can be incomplete, so we can't use the start of | |
5036 | the next CU as end of this CU. We create the CUs here with length 0, | |
5037 | and in cutu_reader::cutu_reader we'll fill in the actual length. */ | |
5038 | dwarf2_per_cu_data *per_cu | |
5039 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, | |
5040 | sect_off, 0); | |
5041 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); | |
5042 | } | |
5043 | } | |
5044 | ||
927aa2e7 JK |
5045 | sect_offset sect_off_prev; |
5046 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5047 | { | |
5048 | sect_offset sect_off_next; | |
5049 | if (i < map.cu_count) | |
5050 | { | |
5051 | sect_off_next | |
5052 | = (sect_offset) (extract_unsigned_integer | |
5053 | (map.cu_table_reordered + i * map.offset_size, | |
5054 | map.offset_size, | |
5055 | map.dwarf5_byte_order)); | |
5056 | } | |
5057 | else | |
5058 | sect_off_next = (sect_offset) section.size; | |
5059 | if (i >= 1) | |
5060 | { | |
5061 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5062 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5063 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5064 | sect_off_prev, length); |
b76e467d | 5065 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5066 | } |
5067 | sect_off_prev = sect_off_next; | |
5068 | } | |
5069 | } | |
5070 | ||
5071 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5072 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5073 | |
5074 | static void | |
ed2dc618 | 5075 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5076 | const mapped_debug_names &map, |
5077 | const mapped_debug_names &dwz_map) | |
5078 | { | |
b76e467d SM |
5079 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5080 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5081 | |
ed2dc618 SM |
5082 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5083 | dwarf2_per_objfile->info, | |
b76e467d | 5084 | false /* is_dwz */); |
927aa2e7 JK |
5085 | |
5086 | if (dwz_map.cu_count == 0) | |
5087 | return; | |
5088 | ||
ed2dc618 SM |
5089 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5090 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5091 | true /* is_dwz */); |
927aa2e7 JK |
5092 | } |
5093 | ||
5094 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5095 | elements of all the CUs and return true. Otherwise, return false. */ | |
5096 | ||
5097 | static bool | |
ed2dc618 | 5098 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5099 | { |
22ca247e TT |
5100 | std::unique_ptr<mapped_debug_names> map |
5101 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5102 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5103 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5104 | |
5105 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5106 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5107 | *map)) |
927aa2e7 JK |
5108 | return false; |
5109 | ||
5110 | /* Don't use the index if it's empty. */ | |
22ca247e | 5111 | if (map->name_count == 0) |
927aa2e7 JK |
5112 | return false; |
5113 | ||
5114 | /* If there is a .dwz file, read it so we can get its CU list as | |
5115 | well. */ | |
ed2dc618 | 5116 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5117 | if (dwz != NULL) |
5118 | { | |
5119 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5120 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5121 | &dwz->debug_names, dwz_map)) |
5122 | { | |
5123 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5124 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5125 | return false; |
5126 | } | |
5127 | } | |
5128 | ||
22ca247e | 5129 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5130 | |
22ca247e | 5131 | if (map->tu_count != 0) |
927aa2e7 JK |
5132 | { |
5133 | /* We can only handle a single .debug_types when we have an | |
5134 | index. */ | |
fd5866f6 | 5135 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5136 | return false; |
5137 | ||
fd5866f6 | 5138 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5139 | |
5140 | create_signatured_type_table_from_debug_names | |
22ca247e | 5141 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5142 | } |
5143 | ||
ed2dc618 SM |
5144 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5145 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5146 | |
22ca247e | 5147 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5148 | dwarf2_per_objfile->using_index = 1; |
5149 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5150 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5151 | |
5152 | return true; | |
5153 | } | |
5154 | ||
927aa2e7 JK |
5155 | /* Type used to manage iterating over all CUs looking for a symbol for |
5156 | .debug_names. */ | |
5157 | ||
5158 | class dw2_debug_names_iterator | |
5159 | { | |
5160 | public: | |
927aa2e7 | 5161 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5162 | gdb::optional<block_enum> block_index, |
5163 | domain_enum domain, | |
927aa2e7 | 5164 | const char *name) |
2b79f376 | 5165 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5166 | m_addr (find_vec_in_debug_names (map, name)) |
5167 | {} | |
5168 | ||
5169 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5170 | search_domain search, uint32_t namei) | |
5171 | : m_map (map), | |
5172 | m_search (search), | |
5173 | m_addr (find_vec_in_debug_names (map, namei)) | |
5174 | {} | |
5175 | ||
3b00ef10 TT |
5176 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5177 | block_enum block_index, domain_enum domain, | |
5178 | uint32_t namei) | |
5179 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5180 | m_addr (find_vec_in_debug_names (map, namei)) | |
5181 | {} | |
5182 | ||
927aa2e7 JK |
5183 | /* Return the next matching CU or NULL if there are no more. */ |
5184 | dwarf2_per_cu_data *next (); | |
5185 | ||
5186 | private: | |
5187 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5188 | const char *name); | |
5189 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5190 | uint32_t namei); | |
5191 | ||
5192 | /* The internalized form of .debug_names. */ | |
5193 | const mapped_debug_names &m_map; | |
5194 | ||
2b79f376 SM |
5195 | /* If set, only look for symbols that match that block. Valid values are |
5196 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5197 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5198 | |
5199 | /* The kind of symbol we're looking for. */ | |
5200 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5201 | const search_domain m_search = ALL_DOMAIN; | |
5202 | ||
5203 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5204 | not found. */ | |
5205 | const gdb_byte *m_addr; | |
5206 | }; | |
5207 | ||
5208 | const char * | |
5209 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5210 | { | |
5211 | const ULONGEST namei_string_offs | |
5212 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5213 | + namei * offset_size), | |
5214 | offset_size, | |
5215 | dwarf5_byte_order); | |
4f44ae6c TT |
5216 | return read_indirect_string_at_offset (dwarf2_per_objfile, |
5217 | namei_string_offs); | |
927aa2e7 JK |
5218 | } |
5219 | ||
5220 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5221 | found, return pointer to its pool data. If NAME cannot be found, | |
5222 | return NULL. */ | |
5223 | ||
5224 | const gdb_byte * | |
5225 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5226 | (const mapped_debug_names &map, const char *name) | |
5227 | { | |
5228 | int (*cmp) (const char *, const char *); | |
5229 | ||
54ee4252 | 5230 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5231 | if (current_language->la_language == language_cplus |
5232 | || current_language->la_language == language_fortran | |
5233 | || current_language->la_language == language_d) | |
5234 | { | |
5235 | /* NAME is already canonical. Drop any qualifiers as | |
5236 | .debug_names does not contain any. */ | |
5237 | ||
5238 | if (strchr (name, '(') != NULL) | |
5239 | { | |
54ee4252 | 5240 | without_params = cp_remove_params (name); |
927aa2e7 | 5241 | if (without_params != NULL) |
54ee4252 | 5242 | name = without_params.get (); |
927aa2e7 JK |
5243 | } |
5244 | } | |
5245 | ||
5246 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5247 | ||
5248 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5249 | uint32_t namei | |
5250 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5251 | (map.bucket_table_reordered | |
5252 | + (full_hash % map.bucket_count)), 4, | |
5253 | map.dwarf5_byte_order); | |
5254 | if (namei == 0) | |
5255 | return NULL; | |
5256 | --namei; | |
5257 | if (namei >= map.name_count) | |
5258 | { | |
b98664d3 | 5259 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5260 | "[in module %s]"), |
5261 | namei, map.name_count, | |
ed2dc618 | 5262 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5263 | return NULL; |
5264 | } | |
5265 | ||
5266 | for (;;) | |
5267 | { | |
5268 | const uint32_t namei_full_hash | |
5269 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5270 | (map.hash_table_reordered + namei), 4, | |
5271 | map.dwarf5_byte_order); | |
5272 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5273 | return NULL; | |
5274 | ||
5275 | if (full_hash == namei_full_hash) | |
5276 | { | |
5277 | const char *const namei_string = map.namei_to_name (namei); | |
5278 | ||
5279 | #if 0 /* An expensive sanity check. */ | |
5280 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5281 | { | |
b98664d3 | 5282 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5283 | "[in module %s]"), |
5284 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5285 | return NULL; | |
5286 | } | |
5287 | #endif | |
5288 | ||
5289 | if (cmp (namei_string, name) == 0) | |
5290 | { | |
5291 | const ULONGEST namei_entry_offs | |
5292 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5293 | + namei * map.offset_size), | |
5294 | map.offset_size, map.dwarf5_byte_order); | |
5295 | return map.entry_pool + namei_entry_offs; | |
5296 | } | |
5297 | } | |
5298 | ||
5299 | ++namei; | |
5300 | if (namei >= map.name_count) | |
5301 | return NULL; | |
5302 | } | |
5303 | } | |
5304 | ||
5305 | const gdb_byte * | |
5306 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5307 | (const mapped_debug_names &map, uint32_t namei) | |
5308 | { | |
5309 | if (namei >= map.name_count) | |
5310 | { | |
b98664d3 | 5311 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5312 | "[in module %s]"), |
5313 | namei, map.name_count, | |
ed2dc618 | 5314 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5315 | return NULL; |
5316 | } | |
5317 | ||
5318 | const ULONGEST namei_entry_offs | |
5319 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5320 | + namei * map.offset_size), | |
5321 | map.offset_size, map.dwarf5_byte_order); | |
5322 | return map.entry_pool + namei_entry_offs; | |
5323 | } | |
5324 | ||
5325 | /* See dw2_debug_names_iterator. */ | |
5326 | ||
5327 | dwarf2_per_cu_data * | |
5328 | dw2_debug_names_iterator::next () | |
5329 | { | |
5330 | if (m_addr == NULL) | |
5331 | return NULL; | |
5332 | ||
ed2dc618 SM |
5333 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5334 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5335 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5336 | |
5337 | again: | |
5338 | ||
5339 | unsigned int bytes_read; | |
5340 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5341 | m_addr += bytes_read; | |
5342 | if (abbrev == 0) | |
5343 | return NULL; | |
5344 | ||
5345 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5346 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5347 | { | |
b98664d3 | 5348 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5349 | "[in module %s]"), |
ed2dc618 | 5350 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5351 | return NULL; |
5352 | } | |
5353 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5354 | enum class symbol_linkage { |
5355 | unknown, | |
5356 | static_, | |
5357 | extern_, | |
23c13d42 | 5358 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5359 | dwarf2_per_cu_data *per_cu = NULL; |
5360 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5361 | { | |
5362 | ULONGEST ull; | |
5363 | switch (attr.form) | |
5364 | { | |
5365 | case DW_FORM_implicit_const: | |
5366 | ull = attr.implicit_const; | |
5367 | break; | |
5368 | case DW_FORM_flag_present: | |
5369 | ull = 1; | |
5370 | break; | |
5371 | case DW_FORM_udata: | |
5372 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5373 | m_addr += bytes_read; | |
5374 | break; | |
6dc55ce9 | 5375 | case DW_FORM_ref4: |
5376 | ull = read_4_bytes (abfd, m_addr); | |
5377 | m_addr += 4; | |
5378 | break; | |
5379 | case DW_FORM_ref8: | |
5380 | ull = read_8_bytes (abfd, m_addr); | |
5381 | m_addr += 8; | |
5382 | break; | |
5383 | case DW_FORM_ref_sig8: | |
5384 | ull = read_8_bytes (abfd, m_addr); | |
5385 | m_addr += 8; | |
5386 | break; | |
927aa2e7 | 5387 | default: |
b98664d3 | 5388 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5389 | dwarf_form_name (attr.form), |
ed2dc618 | 5390 | objfile_name (objfile)); |
927aa2e7 JK |
5391 | return NULL; |
5392 | } | |
5393 | switch (attr.dw_idx) | |
5394 | { | |
5395 | case DW_IDX_compile_unit: | |
5396 | /* Don't crash on bad data. */ | |
b76e467d | 5397 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5398 | { |
b98664d3 | 5399 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5400 | " [in module %s]"), |
5401 | pulongest (ull), | |
5402 | objfile_name (dwarf2_per_objfile->objfile)); | |
5403 | continue; | |
5404 | } | |
ff4c9fec | 5405 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5406 | break; |
8af5c486 JK |
5407 | case DW_IDX_type_unit: |
5408 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5409 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5410 | { |
b98664d3 | 5411 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5412 | " [in module %s]"), |
5413 | pulongest (ull), | |
5414 | objfile_name (dwarf2_per_objfile->objfile)); | |
5415 | continue; | |
5416 | } | |
ff4c9fec | 5417 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5418 | break; |
6dc55ce9 | 5419 | case DW_IDX_die_offset: |
5420 | /* In a per-CU index (as opposed to a per-module index), index | |
5421 | entries without CU attribute implicitly refer to the single CU. */ | |
5422 | if (per_cu == NULL) | |
5423 | per_cu = dwarf2_per_objfile->get_cu (0); | |
5424 | break; | |
927aa2e7 JK |
5425 | case DW_IDX_GNU_internal: |
5426 | if (!m_map.augmentation_is_gdb) | |
5427 | break; | |
23c13d42 | 5428 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5429 | break; |
5430 | case DW_IDX_GNU_external: | |
5431 | if (!m_map.augmentation_is_gdb) | |
5432 | break; | |
23c13d42 | 5433 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5434 | break; |
5435 | } | |
5436 | } | |
5437 | ||
5438 | /* Skip if already read in. */ | |
5439 | if (per_cu->v.quick->compunit_symtab) | |
5440 | goto again; | |
5441 | ||
5442 | /* Check static vs global. */ | |
23c13d42 | 5443 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5444 | { |
2b79f376 | 5445 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5446 | const bool symbol_is_static = |
5447 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5448 | if (want_static != symbol_is_static) |
2b79f376 | 5449 | goto again; |
927aa2e7 JK |
5450 | } |
5451 | ||
5452 | /* Match dw2_symtab_iter_next, symbol_kind | |
5453 | and debug_names::psymbol_tag. */ | |
5454 | switch (m_domain) | |
5455 | { | |
5456 | case VAR_DOMAIN: | |
5457 | switch (indexval.dwarf_tag) | |
5458 | { | |
5459 | case DW_TAG_variable: | |
5460 | case DW_TAG_subprogram: | |
5461 | /* Some types are also in VAR_DOMAIN. */ | |
5462 | case DW_TAG_typedef: | |
5463 | case DW_TAG_structure_type: | |
5464 | break; | |
5465 | default: | |
5466 | goto again; | |
5467 | } | |
5468 | break; | |
5469 | case STRUCT_DOMAIN: | |
5470 | switch (indexval.dwarf_tag) | |
5471 | { | |
5472 | case DW_TAG_typedef: | |
5473 | case DW_TAG_structure_type: | |
5474 | break; | |
5475 | default: | |
5476 | goto again; | |
5477 | } | |
5478 | break; | |
5479 | case LABEL_DOMAIN: | |
5480 | switch (indexval.dwarf_tag) | |
5481 | { | |
5482 | case 0: | |
5483 | case DW_TAG_variable: | |
5484 | break; | |
5485 | default: | |
5486 | goto again; | |
5487 | } | |
5488 | break; | |
59c35742 AB |
5489 | case MODULE_DOMAIN: |
5490 | switch (indexval.dwarf_tag) | |
5491 | { | |
5492 | case DW_TAG_module: | |
5493 | break; | |
5494 | default: | |
5495 | goto again; | |
5496 | } | |
5497 | break; | |
927aa2e7 JK |
5498 | default: |
5499 | break; | |
5500 | } | |
5501 | ||
5502 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5503 | debug_names::psymbol_tag. */ | |
5504 | switch (m_search) | |
4b514bc8 | 5505 | { |
927aa2e7 JK |
5506 | case VARIABLES_DOMAIN: |
5507 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5508 | { |
927aa2e7 JK |
5509 | case DW_TAG_variable: |
5510 | break; | |
5511 | default: | |
5512 | goto again; | |
4b514bc8 | 5513 | } |
927aa2e7 JK |
5514 | break; |
5515 | case FUNCTIONS_DOMAIN: | |
5516 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5517 | { |
927aa2e7 JK |
5518 | case DW_TAG_subprogram: |
5519 | break; | |
5520 | default: | |
5521 | goto again; | |
4b514bc8 | 5522 | } |
927aa2e7 JK |
5523 | break; |
5524 | case TYPES_DOMAIN: | |
5525 | switch (indexval.dwarf_tag) | |
5526 | { | |
5527 | case DW_TAG_typedef: | |
5528 | case DW_TAG_structure_type: | |
5529 | break; | |
5530 | default: | |
5531 | goto again; | |
5532 | } | |
5533 | break; | |
59c35742 AB |
5534 | case MODULES_DOMAIN: |
5535 | switch (indexval.dwarf_tag) | |
5536 | { | |
5537 | case DW_TAG_module: | |
5538 | break; | |
5539 | default: | |
5540 | goto again; | |
5541 | } | |
927aa2e7 JK |
5542 | default: |
5543 | break; | |
4b514bc8 | 5544 | } |
927aa2e7 JK |
5545 | |
5546 | return per_cu; | |
4b514bc8 | 5547 | } |
61920122 | 5548 | |
927aa2e7 | 5549 | static struct compunit_symtab * |
c7f839cb | 5550 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 5551 | const char *name, domain_enum domain) |
4b514bc8 | 5552 | { |
ed2dc618 SM |
5553 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5554 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 5555 | |
927aa2e7 JK |
5556 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
5557 | if (!mapp) | |
61920122 | 5558 | { |
927aa2e7 JK |
5559 | /* index is NULL if OBJF_READNOW. */ |
5560 | return NULL; | |
5561 | } | |
5562 | const auto &map = *mapp; | |
9291a0cd | 5563 | |
2b79f376 | 5564 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 5565 | |
927aa2e7 JK |
5566 | struct compunit_symtab *stab_best = NULL; |
5567 | struct dwarf2_per_cu_data *per_cu; | |
5568 | while ((per_cu = iter.next ()) != NULL) | |
5569 | { | |
5570 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 5571 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 5572 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 5573 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 5574 | |
927aa2e7 JK |
5575 | sym = block_find_symbol (block, name, domain, |
5576 | block_find_non_opaque_type_preferred, | |
5577 | &with_opaque); | |
9703b513 | 5578 | |
927aa2e7 JK |
5579 | /* Some caution must be observed with overloaded functions and |
5580 | methods, since the index will not contain any overload | |
5581 | information (but NAME might contain it). */ | |
a3ec0bb1 | 5582 | |
927aa2e7 | 5583 | if (sym != NULL |
987012b8 | 5584 | && strcmp_iw (sym->search_name (), name) == 0) |
927aa2e7 JK |
5585 | return stab; |
5586 | if (with_opaque != NULL | |
987012b8 | 5587 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
927aa2e7 | 5588 | stab_best = stab; |
9703b513 | 5589 | |
927aa2e7 | 5590 | /* Keep looking through other CUs. */ |
9703b513 TT |
5591 | } |
5592 | ||
927aa2e7 | 5593 | return stab_best; |
9703b513 TT |
5594 | } |
5595 | ||
927aa2e7 JK |
5596 | /* This dumps minimal information about .debug_names. It is called |
5597 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5598 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5599 | |
927aa2e7 JK |
5600 | static void |
5601 | dw2_debug_names_dump (struct objfile *objfile) | |
5602 | { | |
ed2dc618 SM |
5603 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5604 | = get_dwarf2_per_objfile (objfile); | |
5605 | ||
927aa2e7 JK |
5606 | gdb_assert (dwarf2_per_objfile->using_index); |
5607 | printf_filtered (".debug_names:"); | |
5608 | if (dwarf2_per_objfile->debug_names_table) | |
5609 | printf_filtered (" exists\n"); | |
5610 | else | |
5611 | printf_filtered (" faked for \"readnow\"\n"); | |
5612 | printf_filtered ("\n"); | |
9291a0cd TT |
5613 | } |
5614 | ||
9291a0cd | 5615 | static void |
927aa2e7 JK |
5616 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
5617 | const char *func_name) | |
9291a0cd | 5618 | { |
ed2dc618 SM |
5619 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5620 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 5621 | |
927aa2e7 JK |
5622 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
5623 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 5624 | { |
927aa2e7 | 5625 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 5626 | |
2b79f376 | 5627 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 5628 | |
927aa2e7 JK |
5629 | struct dwarf2_per_cu_data *per_cu; |
5630 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 5631 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
5632 | } |
5633 | } | |
24c79950 | 5634 | |
3b00ef10 TT |
5635 | static void |
5636 | dw2_debug_names_map_matching_symbols | |
5637 | (struct objfile *objfile, | |
5638 | const lookup_name_info &name, domain_enum domain, | |
5639 | int global, | |
5640 | gdb::function_view<symbol_found_callback_ftype> callback, | |
5641 | symbol_compare_ftype *ordered_compare) | |
5642 | { | |
5643 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
5644 | = get_dwarf2_per_objfile (objfile); | |
5645 | ||
5646 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
5647 | if (!dwarf2_per_objfile->debug_names_table) | |
5648 | return; | |
5649 | ||
5650 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
5651 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
5652 | ||
5653 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5654 | auto matcher = [&] (const char *symname) | |
5655 | { | |
5656 | if (ordered_compare == nullptr) | |
5657 | return true; | |
5658 | return ordered_compare (symname, match_name) == 0; | |
5659 | }; | |
5660 | ||
5661 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
5662 | [&] (offset_type namei) | |
5663 | { | |
5664 | /* The name was matched, now expand corresponding CUs that were | |
5665 | marked. */ | |
5666 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
5667 | ||
5668 | struct dwarf2_per_cu_data *per_cu; | |
5669 | while ((per_cu = iter.next ()) != NULL) | |
5670 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
5671 | return true; | |
5672 | }); | |
5673 | ||
5674 | /* It's a shame we couldn't do this inside the | |
5675 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
5676 | that have already been expanded. Instead, this loop matches what | |
5677 | the psymtab code does. */ | |
5678 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
5679 | { | |
5680 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
5681 | if (cust != nullptr) | |
5682 | { | |
5683 | const struct block *block | |
5684 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
5685 | if (!iterate_over_symbols_terminated (block, name, | |
5686 | domain, callback)) | |
5687 | break; | |
5688 | } | |
5689 | } | |
5690 | } | |
5691 | ||
927aa2e7 JK |
5692 | static void |
5693 | dw2_debug_names_expand_symtabs_matching | |
5694 | (struct objfile *objfile, | |
5695 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
c1a66c06 | 5696 | const lookup_name_info *lookup_name, |
927aa2e7 JK |
5697 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
5698 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5699 | enum search_domain kind) | |
5700 | { | |
ed2dc618 SM |
5701 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5702 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 5703 | |
927aa2e7 JK |
5704 | /* debug_names_table is NULL if OBJF_READNOW. */ |
5705 | if (!dwarf2_per_objfile->debug_names_table) | |
5706 | return; | |
9291a0cd | 5707 | |
ed2dc618 | 5708 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 5709 | |
c1a66c06 TV |
5710 | if (symbol_matcher == NULL && lookup_name == NULL) |
5711 | { | |
5712 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
5713 | { | |
5714 | QUIT; | |
5715 | ||
5716 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
5717 | expansion_notify); | |
5718 | } | |
5719 | return; | |
5720 | } | |
5721 | ||
44ed8f3e | 5722 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 5723 | |
c1a66c06 | 5724 | dw2_expand_symtabs_matching_symbol (map, *lookup_name, |
44ed8f3e PA |
5725 | symbol_matcher, |
5726 | kind, [&] (offset_type namei) | |
927aa2e7 | 5727 | { |
927aa2e7 JK |
5728 | /* The name was matched, now expand corresponding CUs that were |
5729 | marked. */ | |
5730 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 5731 | |
927aa2e7 JK |
5732 | struct dwarf2_per_cu_data *per_cu; |
5733 | while ((per_cu = iter.next ()) != NULL) | |
5734 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
5735 | expansion_notify); | |
3b00ef10 | 5736 | return true; |
44ed8f3e | 5737 | }); |
9291a0cd TT |
5738 | } |
5739 | ||
927aa2e7 | 5740 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
5741 | { |
5742 | dw2_has_symbols, | |
5743 | dw2_find_last_source_symtab, | |
5744 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5745 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 5746 | dw2_debug_names_lookup_symbol, |
d3214198 | 5747 | NULL, |
9291a0cd | 5748 | dw2_print_stats, |
927aa2e7 | 5749 | dw2_debug_names_dump, |
927aa2e7 | 5750 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 5751 | dw2_expand_all_symtabs, |
652a8996 | 5752 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 5753 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 5754 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 5755 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5756 | NULL, |
9291a0cd TT |
5757 | dw2_map_symbol_filenames |
5758 | }; | |
5759 | ||
4485a1c1 SM |
5760 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5761 | to either a dwarf2_per_objfile or dwz_file object. */ | |
5762 | ||
5763 | template <typename T> | |
5764 | static gdb::array_view<const gdb_byte> | |
5765 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5766 | { | |
5767 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5768 | ||
96b79293 | 5769 | if (section->empty ()) |
4485a1c1 SM |
5770 | return {}; |
5771 | ||
5772 | /* Older elfutils strip versions could keep the section in the main | |
5773 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5774 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5775 | return {}; |
5776 | ||
96b79293 | 5777 | section->read (obj); |
4485a1c1 | 5778 | |
8bebfcda PA |
5779 | /* dwarf2_section_info::size is a bfd_size_type, while |
5780 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5781 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5782 | is 32-bit. So we need an explicit narrowing conversion here. | |
5783 | This is fine, because it's impossible to allocate or mmap an | |
5784 | array/buffer larger than what size_t can represent. */ | |
5785 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5786 | } |
5787 | ||
87d6a7aa SM |
5788 | /* Lookup the index cache for the contents of the index associated to |
5789 | DWARF2_OBJ. */ | |
5790 | ||
5791 | static gdb::array_view<const gdb_byte> | |
5792 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
5793 | { | |
5794 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5795 | if (build_id == nullptr) | |
5796 | return {}; | |
5797 | ||
5798 | return global_index_cache.lookup_gdb_index (build_id, | |
5799 | &dwarf2_obj->index_cache_res); | |
5800 | } | |
5801 | ||
5802 | /* Same as the above, but for DWZ. */ | |
5803 | ||
5804 | static gdb::array_view<const gdb_byte> | |
5805 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5806 | { | |
5807 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5808 | if (build_id == nullptr) | |
5809 | return {}; | |
5810 | ||
5811 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5812 | } | |
5813 | ||
3c0aa29a | 5814 | /* See symfile.h. */ |
9291a0cd | 5815 | |
3c0aa29a PA |
5816 | bool |
5817 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 5818 | { |
ed2dc618 SM |
5819 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5820 | = get_dwarf2_per_objfile (objfile); | |
5821 | ||
9291a0cd TT |
5822 | /* If we're about to read full symbols, don't bother with the |
5823 | indices. In this case we also don't care if some other debug | |
5824 | format is making psymtabs, because they are all about to be | |
5825 | expanded anyway. */ | |
5826 | if ((objfile->flags & OBJF_READNOW)) | |
5827 | { | |
9291a0cd | 5828 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
5829 | create_all_comp_units (dwarf2_per_objfile); |
5830 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
5831 | dwarf2_per_objfile->quick_file_names_table |
5832 | = create_quick_file_names_table | |
5833 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 5834 | |
b76e467d | 5835 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5836 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 5837 | { |
ff4c9fec | 5838 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 5839 | |
e254ef6a DE |
5840 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5841 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5842 | } |
5843 | ||
5844 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5845 | these functions will be no-ops because we will have expanded | |
5846 | all symtabs. */ | |
3c0aa29a PA |
5847 | *index_kind = dw_index_kind::GDB_INDEX; |
5848 | return true; | |
9291a0cd TT |
5849 | } |
5850 | ||
ed2dc618 | 5851 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
5852 | { |
5853 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
5854 | return true; | |
5855 | } | |
927aa2e7 | 5856 | |
4485a1c1 SM |
5857 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
5858 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
5859 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
5860 | { |
5861 | *index_kind = dw_index_kind::GDB_INDEX; | |
5862 | return true; | |
5863 | } | |
9291a0cd | 5864 | |
87d6a7aa SM |
5865 | /* ... otherwise, try to find the index in the index cache. */ |
5866 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
5867 | get_gdb_index_contents_from_cache, | |
5868 | get_gdb_index_contents_from_cache_dwz)) | |
5869 | { | |
5870 | global_index_cache.hit (); | |
5871 | *index_kind = dw_index_kind::GDB_INDEX; | |
5872 | return true; | |
5873 | } | |
5874 | ||
5875 | global_index_cache.miss (); | |
3c0aa29a | 5876 | return false; |
9291a0cd TT |
5877 | } |
5878 | ||
5879 | \f | |
5880 | ||
dce234bc PP |
5881 | /* Build a partial symbol table. */ |
5882 | ||
5883 | void | |
f29dff0a | 5884 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5885 | { |
ed2dc618 SM |
5886 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5887 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 5888 | |
6eee24ce | 5889 | init_psymbol_list (objfile, 1024); |
c906108c | 5890 | |
a70b8144 | 5891 | try |
c9bf0622 TT |
5892 | { |
5893 | /* This isn't really ideal: all the data we allocate on the | |
5894 | objfile's obstack is still uselessly kept around. However, | |
5895 | freeing it seems unsafe. */ | |
906768f9 | 5896 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 5897 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 5898 | psymtabs.keep (); |
87d6a7aa SM |
5899 | |
5900 | /* (maybe) store an index in the cache. */ | |
5901 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 5902 | } |
230d2906 | 5903 | catch (const gdb_exception_error &except) |
492d29ea PA |
5904 | { |
5905 | exception_print (gdb_stderr, except); | |
5906 | } | |
c906108c | 5907 | } |
c906108c | 5908 | |
3b80fe9b DE |
5909 | /* Find the base address of the compilation unit for range lists and |
5910 | location lists. It will normally be specified by DW_AT_low_pc. | |
5911 | In DWARF-3 draft 4, the base address could be overridden by | |
5912 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5913 | compilation units with discontinuous ranges. */ | |
5914 | ||
5915 | static void | |
5916 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5917 | { | |
5918 | struct attribute *attr; | |
5919 | ||
2b24b6e4 | 5920 | cu->base_address.reset (); |
3b80fe9b DE |
5921 | |
5922 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5923 | if (attr != nullptr) |
2b24b6e4 | 5924 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5925 | else |
5926 | { | |
5927 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5928 | if (attr != nullptr) |
2b24b6e4 | 5929 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5930 | } |
5931 | } | |
5932 | ||
36586728 TT |
5933 | /* Helper function that returns the proper abbrev section for |
5934 | THIS_CU. */ | |
5935 | ||
5936 | static struct dwarf2_section_info * | |
5937 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5938 | { | |
5939 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 5940 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
5941 | |
5942 | if (this_cu->is_dwz) | |
ed2dc618 | 5943 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
5944 | else |
5945 | abbrev = &dwarf2_per_objfile->abbrev; | |
5946 | ||
5947 | return abbrev; | |
5948 | } | |
5949 | ||
f4dc4d17 DE |
5950 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5951 | ||
5952 | static sect_offset | |
ed2dc618 SM |
5953 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5954 | struct dwarf2_section_info *section, | |
9c541725 | 5955 | sect_offset sect_off) |
f4dc4d17 | 5956 | { |
96b79293 | 5957 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5958 | const gdb_byte *info_ptr; |
ac298888 | 5959 | unsigned int initial_length_size, offset_size; |
43988095 | 5960 | uint16_t version; |
f4dc4d17 | 5961 | |
96b79293 | 5962 | section->read (dwarf2_per_objfile->objfile); |
9c541725 | 5963 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5964 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5965 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5966 | info_ptr += initial_length_size; |
5967 | ||
5968 | version = read_2_bytes (abfd, info_ptr); | |
5969 | info_ptr += 2; | |
5970 | if (version >= 5) | |
5971 | { | |
5972 | /* Skip unit type and address size. */ | |
5973 | info_ptr += 2; | |
5974 | } | |
5975 | ||
24aa364d | 5976 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5977 | } |
5978 | ||
b83470bf TT |
5979 | /* A partial symtab that is used only for include files. */ |
5980 | struct dwarf2_include_psymtab : public partial_symtab | |
5981 | { | |
5982 | dwarf2_include_psymtab (const char *filename, struct objfile *objfile) | |
5983 | : partial_symtab (filename, objfile) | |
5984 | { | |
5985 | } | |
5986 | ||
5987 | void read_symtab (struct objfile *objfile) override | |
5988 | { | |
194d088f TV |
5989 | /* It's an include file, no symbols to read for it. |
5990 | Everything is in the includer symtab. */ | |
5991 | ||
5992 | /* The expansion of a dwarf2_include_psymtab is just a trigger for | |
5993 | expansion of the includer psymtab. We use the dependencies[0] field to | |
5994 | model the includer. But if we go the regular route of calling | |
5995 | expand_psymtab here, and having expand_psymtab call expand_dependencies | |
5996 | to expand the includer, we'll only use expand_psymtab on the includer | |
5997 | (making it a non-toplevel psymtab), while if we expand the includer via | |
5998 | another path, we'll use read_symtab (making it a toplevel psymtab). | |
5999 | So, don't pretend a dwarf2_include_psymtab is an actual toplevel | |
6000 | psymtab, and trigger read_symtab on the includer here directly. */ | |
6001 | includer ()->read_symtab (objfile); | |
b83470bf TT |
6002 | } |
6003 | ||
6004 | void expand_psymtab (struct objfile *objfile) override | |
6005 | { | |
194d088f TV |
6006 | /* This is not called by read_symtab, and should not be called by any |
6007 | expand_dependencies. */ | |
6008 | gdb_assert (false); | |
b83470bf TT |
6009 | } |
6010 | ||
6011 | bool readin_p () const override | |
6012 | { | |
194d088f | 6013 | return includer ()->readin_p (); |
b83470bf TT |
6014 | } |
6015 | ||
6016 | struct compunit_symtab *get_compunit_symtab () const override | |
6017 | { | |
6018 | return nullptr; | |
6019 | } | |
6020 | ||
6021 | private: | |
194d088f TV |
6022 | partial_symtab *includer () const |
6023 | { | |
6024 | /* An include psymtab has exactly one dependency: the psymtab that | |
6025 | includes it. */ | |
6026 | gdb_assert (this->number_of_dependencies == 1); | |
6027 | return this->dependencies[0]; | |
6028 | } | |
b83470bf TT |
6029 | }; |
6030 | ||
aaa75496 JB |
6031 | /* Allocate a new partial symtab for file named NAME and mark this new |
6032 | partial symtab as being an include of PST. */ | |
6033 | ||
6034 | static void | |
891813be | 6035 | dwarf2_create_include_psymtab (const char *name, dwarf2_psymtab *pst, |
aaa75496 JB |
6036 | struct objfile *objfile) |
6037 | { | |
b83470bf | 6038 | dwarf2_include_psymtab *subpst = new dwarf2_include_psymtab (name, objfile); |
aaa75496 | 6039 | |
fbd9ab74 JK |
6040 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6041 | { | |
6042 | /* It shares objfile->objfile_obstack. */ | |
6043 | subpst->dirname = pst->dirname; | |
6044 | } | |
6045 | ||
a9342b62 | 6046 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
6047 | subpst->dependencies[0] = pst; |
6048 | subpst->number_of_dependencies = 1; | |
aaa75496 JB |
6049 | } |
6050 | ||
6051 | /* Read the Line Number Program data and extract the list of files | |
6052 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6053 | partial symtab for each of these included files. */ |
aaa75496 JB |
6054 | |
6055 | static void | |
6056 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 6057 | struct die_info *die, |
891813be | 6058 | dwarf2_psymtab *pst) |
aaa75496 | 6059 | { |
fff8551c | 6060 | line_header_up lh; |
d85a05f0 | 6061 | struct attribute *attr; |
aaa75496 | 6062 | |
d85a05f0 | 6063 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
435d3d88 | 6064 | if (attr != nullptr) |
9c541725 | 6065 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6066 | if (lh == NULL) |
6067 | return; /* No linetable, so no includes. */ | |
6068 | ||
79748972 TT |
6069 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
6070 | that we pass in the raw text_low here; that is ok because we're | |
6071 | only decoding the line table to make include partial symtabs, and | |
6072 | so the addresses aren't really used. */ | |
4ae976d1 | 6073 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 6074 | pst->raw_text_low (), 1); |
aaa75496 JB |
6075 | } |
6076 | ||
348e048f | 6077 | static hashval_t |
52dc124a | 6078 | hash_signatured_type (const void *item) |
348e048f | 6079 | { |
9a3c8263 SM |
6080 | const struct signatured_type *sig_type |
6081 | = (const struct signatured_type *) item; | |
9a619af0 | 6082 | |
348e048f | 6083 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6084 | return sig_type->signature; |
348e048f DE |
6085 | } |
6086 | ||
6087 | static int | |
52dc124a | 6088 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6089 | { |
9a3c8263 SM |
6090 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6091 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6092 | |
348e048f DE |
6093 | return lhs->signature == rhs->signature; |
6094 | } | |
6095 | ||
1fd400ff TT |
6096 | /* Allocate a hash table for signatured types. */ |
6097 | ||
b0b6a987 | 6098 | static htab_up |
298e9637 | 6099 | allocate_signatured_type_table () |
1fd400ff | 6100 | { |
b0b6a987 TT |
6101 | return htab_up (htab_create_alloc (41, |
6102 | hash_signatured_type, | |
6103 | eq_signatured_type, | |
6104 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
6105 | } |
6106 | ||
d467dd73 | 6107 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6108 | |
6109 | static int | |
d467dd73 | 6110 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6111 | { |
9a3c8263 | 6112 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6113 | std::vector<signatured_type *> *all_type_units |
6114 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6115 | |
b2bdb8cf | 6116 | all_type_units->push_back (sigt); |
1fd400ff TT |
6117 | |
6118 | return 1; | |
6119 | } | |
6120 | ||
78d4d2c5 | 6121 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6122 | and fill them into TYPES_HTAB. It will process only type units, |
6123 | therefore DW_UT_type. */ | |
c88ee1f0 | 6124 | |
78d4d2c5 | 6125 | static void |
ed2dc618 SM |
6126 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6127 | struct dwo_file *dwo_file, | |
b0b6a987 | 6128 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 6129 | rcuh_kind section_kind) |
348e048f | 6130 | { |
3019eac3 | 6131 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6132 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6133 | bfd *abfd; |
6134 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6135 | |
4bdcc0c1 DE |
6136 | abbrev_section = (dwo_file != NULL |
6137 | ? &dwo_file->sections.abbrev | |
6138 | : &dwarf2_per_objfile->abbrev); | |
6139 | ||
b4f54984 | 6140 | if (dwarf_read_debug) |
43988095 | 6141 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
96b79293 TT |
6142 | section->get_name (), |
6143 | abbrev_section->get_file_name ()); | |
09406207 | 6144 | |
96b79293 | 6145 | section->read (objfile); |
78d4d2c5 | 6146 | info_ptr = section->buffer; |
348e048f | 6147 | |
78d4d2c5 JK |
6148 | if (info_ptr == NULL) |
6149 | return; | |
348e048f | 6150 | |
78d4d2c5 JK |
6151 | /* We can't set abfd until now because the section may be empty or |
6152 | not present, in which case the bfd is unknown. */ | |
96b79293 | 6153 | abfd = section->get_bfd_owner (); |
348e048f | 6154 | |
c0ab21c2 TT |
6155 | /* We don't use cutu_reader here because we don't need to read |
6156 | any dies: the signature is in the header. */ | |
3019eac3 | 6157 | |
78d4d2c5 JK |
6158 | end_ptr = info_ptr + section->size; |
6159 | while (info_ptr < end_ptr) | |
6160 | { | |
78d4d2c5 JK |
6161 | struct signatured_type *sig_type; |
6162 | struct dwo_unit *dwo_tu; | |
6163 | void **slot; | |
6164 | const gdb_byte *ptr = info_ptr; | |
6165 | struct comp_unit_head header; | |
6166 | unsigned int length; | |
8b70b953 | 6167 | |
9c541725 | 6168 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6169 | |
a49dd8dd JK |
6170 | /* Initialize it due to a false compiler warning. */ |
6171 | header.signature = -1; | |
9c541725 | 6172 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6173 | |
78d4d2c5 JK |
6174 | /* We need to read the type's signature in order to build the hash |
6175 | table, but we don't need anything else just yet. */ | |
348e048f | 6176 | |
ed2dc618 | 6177 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6178 | abbrev_section, ptr, section_kind); |
348e048f | 6179 | |
4057dfde | 6180 | length = header.get_length (); |
6caca83c | 6181 | |
78d4d2c5 JK |
6182 | /* Skip dummy type units. */ |
6183 | if (ptr >= info_ptr + length | |
43988095 JK |
6184 | || peek_abbrev_code (abfd, ptr) == 0 |
6185 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6186 | { |
6187 | info_ptr += length; | |
6188 | continue; | |
6189 | } | |
dee91e82 | 6190 | |
78d4d2c5 JK |
6191 | if (types_htab == NULL) |
6192 | { | |
6193 | if (dwo_file) | |
298e9637 | 6194 | types_htab = allocate_dwo_unit_table (); |
78d4d2c5 | 6195 | else |
298e9637 | 6196 | types_htab = allocate_signatured_type_table (); |
78d4d2c5 | 6197 | } |
8b70b953 | 6198 | |
78d4d2c5 JK |
6199 | if (dwo_file) |
6200 | { | |
6201 | sig_type = NULL; | |
6202 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6203 | struct dwo_unit); | |
6204 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6205 | dwo_tu->signature = header.signature; |
9c541725 | 6206 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6207 | dwo_tu->section = section; |
9c541725 | 6208 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6209 | dwo_tu->length = length; |
6210 | } | |
6211 | else | |
6212 | { | |
6213 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6214 | The real type_offset is in the DWO file. */ | |
6215 | dwo_tu = NULL; | |
6216 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6217 | struct signatured_type); | |
43988095 | 6218 | sig_type->signature = header.signature; |
9c541725 | 6219 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6220 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6221 | sig_type->per_cu.is_debug_types = 1; |
6222 | sig_type->per_cu.section = section; | |
9c541725 | 6223 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6224 | sig_type->per_cu.length = length; |
6225 | } | |
6226 | ||
b0b6a987 | 6227 | slot = htab_find_slot (types_htab.get (), |
78d4d2c5 JK |
6228 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
6229 | INSERT); | |
6230 | gdb_assert (slot != NULL); | |
6231 | if (*slot != NULL) | |
6232 | { | |
9c541725 | 6233 | sect_offset dup_sect_off; |
0349ea22 | 6234 | |
3019eac3 DE |
6235 | if (dwo_file) |
6236 | { | |
78d4d2c5 JK |
6237 | const struct dwo_unit *dup_tu |
6238 | = (const struct dwo_unit *) *slot; | |
6239 | ||
9c541725 | 6240 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6241 | } |
6242 | else | |
6243 | { | |
78d4d2c5 JK |
6244 | const struct signatured_type *dup_tu |
6245 | = (const struct signatured_type *) *slot; | |
6246 | ||
9c541725 | 6247 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6248 | } |
8b70b953 | 6249 | |
b98664d3 | 6250 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6251 | " the entry at offset %s, signature %s"), |
6252 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6253 | hex_string (header.signature)); |
78d4d2c5 JK |
6254 | } |
6255 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6256 | |
78d4d2c5 | 6257 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6258 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6259 | sect_offset_str (sect_off), | |
43988095 | 6260 | hex_string (header.signature)); |
3019eac3 | 6261 | |
78d4d2c5 JK |
6262 | info_ptr += length; |
6263 | } | |
6264 | } | |
3019eac3 | 6265 | |
78d4d2c5 JK |
6266 | /* Create the hash table of all entries in the .debug_types |
6267 | (or .debug_types.dwo) section(s). | |
6268 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6269 | otherwise it is NULL. | |
b3c8eb43 | 6270 | |
78d4d2c5 | 6271 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6272 | |
78d4d2c5 | 6273 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6274 | |
78d4d2c5 | 6275 | static void |
ed2dc618 SM |
6276 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6277 | struct dwo_file *dwo_file, | |
fd5866f6 | 6278 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 6279 | htab_up &types_htab) |
78d4d2c5 | 6280 | { |
fd5866f6 SM |
6281 | for (dwarf2_section_info §ion : type_sections) |
6282 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6283 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6284 | } |
6285 | ||
6286 | /* Create the hash table of all entries in the .debug_types section, | |
6287 | and initialize all_type_units. | |
6288 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6289 | otherwise non-zero. */ | |
6290 | ||
6291 | static int | |
ed2dc618 | 6292 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6293 | { |
b0b6a987 | 6294 | htab_up types_htab; |
3019eac3 | 6295 | |
ed2dc618 SM |
6296 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6297 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6298 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6299 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6300 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6301 | if (types_htab == NULL) |
6302 | { | |
6303 | dwarf2_per_objfile->signatured_types = NULL; | |
6304 | return 0; | |
6305 | } | |
6306 | ||
b0b6a987 | 6307 | dwarf2_per_objfile->signatured_types = std::move (types_htab); |
348e048f | 6308 | |
b2bdb8cf | 6309 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
b0b6a987 TT |
6310 | dwarf2_per_objfile->all_type_units.reserve |
6311 | (htab_elements (dwarf2_per_objfile->signatured_types.get ())); | |
b2bdb8cf | 6312 | |
b0b6a987 TT |
6313 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types.get (), |
6314 | add_signatured_type_cu_to_table, | |
b2bdb8cf | 6315 | &dwarf2_per_objfile->all_type_units); |
1fd400ff | 6316 | |
348e048f DE |
6317 | return 1; |
6318 | } | |
6319 | ||
6aa5f3a6 DE |
6320 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6321 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6322 | Otherwise we find one. */ | |
6323 | ||
6324 | static struct signatured_type * | |
ed2dc618 SM |
6325 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6326 | void **slot) | |
6aa5f3a6 DE |
6327 | { |
6328 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6329 | |
b2bdb8cf SM |
6330 | if (dwarf2_per_objfile->all_type_units.size () |
6331 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6332 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6333 | |
b2bdb8cf SM |
6334 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6335 | struct signatured_type); | |
6336 | ||
6337 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6338 | sig_type->signature = sig; |
6339 | sig_type->per_cu.is_debug_types = 1; | |
6340 | if (dwarf2_per_objfile->using_index) | |
6341 | { | |
6342 | sig_type->per_cu.v.quick = | |
6343 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6344 | struct dwarf2_per_cu_quick_data); | |
6345 | } | |
6346 | ||
6347 | if (slot == NULL) | |
6348 | { | |
b0b6a987 | 6349 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 DE |
6350 | sig_type, INSERT); |
6351 | } | |
6352 | gdb_assert (*slot == NULL); | |
6353 | *slot = sig_type; | |
6354 | /* The rest of sig_type must be filled in by the caller. */ | |
6355 | return sig_type; | |
6356 | } | |
6357 | ||
a2ce51a0 DE |
6358 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6359 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6360 | ||
6361 | static void | |
ed2dc618 | 6362 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6363 | struct signatured_type *sig_entry, |
6364 | struct dwo_unit *dwo_entry) | |
6365 | { | |
7ee85ab1 | 6366 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6367 | gdb_assert (! sig_entry->per_cu.queued); |
6368 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6369 | if (dwarf2_per_objfile->using_index) |
6370 | { | |
6371 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6372 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6373 | } |
6374 | else | |
6375 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6376 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6377 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6378 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6379 | gdb_assert (sig_entry->dwo_unit == NULL); |
6380 | ||
6381 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6382 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6383 | sig_entry->per_cu.length = dwo_entry->length; |
6384 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6385 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6386 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6387 | sig_entry->dwo_unit = dwo_entry; | |
6388 | } | |
6389 | ||
6390 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6391 | If we haven't read the TU yet, create the signatured_type data structure |
6392 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6393 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6394 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6395 | containing that CU. Otherwise we could end up reading several other DWO | |
6396 | files (due to comdat folding) to process the transitive closure of all the | |
6397 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6398 | type signature that it needs. | |
a2ce51a0 DE |
6399 | We only do this for .gdb_index because in the psymtab case we already have |
6400 | to read all the DWOs to build the type unit groups. */ | |
6401 | ||
6402 | static struct signatured_type * | |
6403 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6404 | { | |
518817b3 SM |
6405 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6406 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6407 | struct dwo_file *dwo_file; |
6408 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6409 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6410 | void **slot; |
a2ce51a0 DE |
6411 | |
6412 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6413 | ||
6aa5f3a6 DE |
6414 | /* If TU skeletons have been removed then we may not have read in any |
6415 | TUs yet. */ | |
6416 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6417 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 DE |
6418 | |
6419 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6420 | Use the global signatured_types array to do our own comdat-folding |
6421 | of types. If this is the first time we're reading this TU, and | |
6422 | the TU has an entry in .gdb_index, replace the recorded data from | |
6423 | .gdb_index with this TU. */ | |
a2ce51a0 | 6424 | |
a2ce51a0 | 6425 | find_sig_entry.signature = sig; |
b0b6a987 | 6426 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6427 | &find_sig_entry, INSERT); |
9a3c8263 | 6428 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6429 | |
6430 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6431 | read. Don't reassign the global entry to point to this DWO if that's |
6432 | the case. Also note that if the TU is already being read, it may not | |
6433 | have come from a DWO, the program may be a mix of Fission-compiled | |
6434 | code and non-Fission-compiled code. */ | |
6435 | ||
6436 | /* Have we already tried to read this TU? | |
6437 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6438 | needn't exist in the global table yet). */ | |
6439 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6440 | return sig_entry; |
6441 | ||
6aa5f3a6 DE |
6442 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6443 | dwo_unit of the TU itself. */ | |
6444 | dwo_file = cu->dwo_unit->dwo_file; | |
6445 | ||
a2ce51a0 DE |
6446 | /* Ok, this is the first time we're reading this TU. */ |
6447 | if (dwo_file->tus == NULL) | |
6448 | return NULL; | |
6449 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6450 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6451 | &find_dwo_entry); | |
a2ce51a0 DE |
6452 | if (dwo_entry == NULL) |
6453 | return NULL; | |
6454 | ||
6aa5f3a6 DE |
6455 | /* If the global table doesn't have an entry for this TU, add one. */ |
6456 | if (sig_entry == NULL) | |
ed2dc618 | 6457 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 6458 | |
ed2dc618 | 6459 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 6460 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6461 | return sig_entry; |
6462 | } | |
6463 | ||
a2ce51a0 DE |
6464 | /* Subroutine of lookup_signatured_type. |
6465 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6466 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6467 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6468 | |
6469 | static struct signatured_type * | |
6470 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6471 | { | |
518817b3 SM |
6472 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6473 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6474 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
6475 | struct dwo_unit *dwo_entry; |
6476 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6477 | void **slot; |
a2ce51a0 DE |
6478 | |
6479 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6480 | gdb_assert (dwp_file != NULL); | |
6481 | ||
6aa5f3a6 DE |
6482 | /* If TU skeletons have been removed then we may not have read in any |
6483 | TUs yet. */ | |
6484 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6485 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 | 6486 | |
6aa5f3a6 | 6487 | find_sig_entry.signature = sig; |
b0b6a987 | 6488 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6489 | &find_sig_entry, INSERT); |
9a3c8263 | 6490 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6491 | |
6492 | /* Have we already tried to read this TU? | |
6493 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6494 | needn't exist in the global table yet). */ | |
6495 | if (sig_entry != NULL) | |
6496 | return sig_entry; | |
6497 | ||
a2ce51a0 DE |
6498 | if (dwp_file->tus == NULL) |
6499 | return NULL; | |
ed2dc618 | 6500 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 6501 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
6502 | if (dwo_entry == NULL) |
6503 | return NULL; | |
6504 | ||
ed2dc618 SM |
6505 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6506 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6507 | |
a2ce51a0 DE |
6508 | return sig_entry; |
6509 | } | |
6510 | ||
380bca97 | 6511 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6512 | Returns NULL if signature SIG is not present in the table. |
6513 | It is up to the caller to complain about this. */ | |
348e048f DE |
6514 | |
6515 | static struct signatured_type * | |
a2ce51a0 | 6516 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6517 | { |
518817b3 SM |
6518 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6519 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6520 | |
a2ce51a0 DE |
6521 | if (cu->dwo_unit |
6522 | && dwarf2_per_objfile->using_index) | |
6523 | { | |
6524 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6525 | These cases require special processing. */ | |
ed2dc618 | 6526 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
6527 | return lookup_dwo_signatured_type (cu, sig); |
6528 | else | |
6529 | return lookup_dwp_signatured_type (cu, sig); | |
6530 | } | |
6531 | else | |
6532 | { | |
6533 | struct signatured_type find_entry, *entry; | |
348e048f | 6534 | |
a2ce51a0 DE |
6535 | if (dwarf2_per_objfile->signatured_types == NULL) |
6536 | return NULL; | |
6537 | find_entry.signature = sig; | |
9a3c8263 | 6538 | entry = ((struct signatured_type *) |
b0b6a987 TT |
6539 | htab_find (dwarf2_per_objfile->signatured_types.get (), |
6540 | &find_entry)); | |
a2ce51a0 DE |
6541 | return entry; |
6542 | } | |
348e048f | 6543 | } |
18a8505e | 6544 | |
42e7ad6c | 6545 | /* Low level DIE reading support. */ |
348e048f | 6546 | |
d85a05f0 DJ |
6547 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6548 | ||
6549 | static void | |
6550 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6551 | struct dwarf2_cu *cu, |
3019eac3 | 6552 | struct dwarf2_section_info *section, |
685af9cd TT |
6553 | struct dwo_file *dwo_file, |
6554 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6555 | { |
fceca515 | 6556 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6557 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6558 | reader->cu = cu; |
3019eac3 | 6559 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6560 | reader->die_section = section; |
6561 | reader->buffer = section->buffer; | |
f664829e | 6562 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6563 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6564 | } |
6565 | ||
c0ab21c2 | 6566 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6567 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6568 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6569 | already. |
6570 | ||
6571 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6572 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6573 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6574 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6575 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6576 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6577 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6578 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6579 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6580 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6581 | kept around for at least as long as *RESULT_READER. | |
6582 | ||
b0c7bfa9 DE |
6583 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6584 | ||
6585 | static int | |
6586 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6587 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 6588 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6589 | const char *stub_comp_dir, |
b0c7bfa9 | 6590 | struct die_reader_specs *result_reader, |
d521ce57 | 6591 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6592 | struct die_info **result_comp_unit_die, |
685af9cd | 6593 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6594 | { |
ed2dc618 | 6595 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
6596 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6597 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6598 | bfd *abfd; |
d521ce57 | 6599 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6600 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6601 | int i,num_extra_attrs; | |
6602 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6603 | struct die_info *comp_unit_die; |
6604 | ||
b0aeadb3 DE |
6605 | /* At most one of these may be provided. */ |
6606 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6607 | |
b0c7bfa9 DE |
6608 | /* These attributes aren't processed until later: |
6609 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6610 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6611 | referenced later. However, these attributes are found in the stub | |
6612 | which we won't have later. In order to not impose this complication | |
6613 | on the rest of the code, we read them here and copy them to the | |
6614 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6615 | |
6616 | stmt_list = NULL; | |
6617 | low_pc = NULL; | |
6618 | high_pc = NULL; | |
6619 | ranges = NULL; | |
6620 | comp_dir = NULL; | |
6621 | ||
6622 | if (stub_comp_unit_die != NULL) | |
6623 | { | |
6624 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6625 | DWO file. */ | |
6626 | if (! this_cu->is_debug_types) | |
6627 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6628 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6629 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6630 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6631 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6632 | ||
a39fdb41 | 6633 | cu->addr_base = stub_comp_unit_die->addr_base (); |
b0c7bfa9 | 6634 | |
18a8505e AT |
6635 | /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute |
6636 | here (if needed). We need the value before we can process | |
6637 | DW_AT_ranges. */ | |
a39fdb41 | 6638 | cu->ranges_base = stub_comp_unit_die->ranges_base (); |
b0c7bfa9 | 6639 | } |
a2ce51a0 DE |
6640 | else if (stub_comp_dir != NULL) |
6641 | { | |
6642 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6643 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6644 | comp_dir->name = DW_AT_comp_dir; |
6645 | comp_dir->form = DW_FORM_string; | |
6646 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6647 | DW_STRING (comp_dir) = stub_comp_dir; | |
6648 | } | |
b0c7bfa9 DE |
6649 | |
6650 | /* Set up for reading the DWO CU/TU. */ | |
6651 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6652 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6653 | section->read (objfile); |
6654 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6655 | begin_info_ptr = info_ptr = (section->buffer |
6656 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6657 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
6658 | |
6659 | if (this_cu->is_debug_types) | |
6660 | { | |
b0c7bfa9 DE |
6661 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6662 | ||
ed2dc618 SM |
6663 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6664 | &cu->header, section, | |
b0c7bfa9 | 6665 | dwo_abbrev_section, |
43988095 | 6666 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6667 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6668 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6669 | { |
6670 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6671 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6672 | hex_string (sig_type->signature), |
43988095 | 6673 | hex_string (cu->header.signature), |
9d8780f0 | 6674 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6675 | bfd_get_filename (abfd)); |
6676 | } | |
9c541725 | 6677 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6678 | /* For DWOs coming from DWP files, we don't know the CU length |
6679 | nor the type's offset in the TU until now. */ | |
4057dfde | 6680 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6681 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6682 | |
6683 | /* Establish the type offset that can be used to lookup the type. | |
6684 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6685 | sig_type->type_offset_in_section |
6686 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6687 | } |
6688 | else | |
6689 | { | |
ed2dc618 SM |
6690 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6691 | &cu->header, section, | |
b0c7bfa9 | 6692 | dwo_abbrev_section, |
43988095 | 6693 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6694 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6695 | /* For DWOs coming from DWP files, we don't know the CU length |
6696 | until now. */ | |
4057dfde | 6697 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6698 | } |
6699 | ||
685af9cd | 6700 | *result_dwo_abbrev_table |
86de1d91 TT |
6701 | = abbrev_table::read (objfile, dwo_abbrev_section, |
6702 | cu->header.abbrev_sect_off); | |
685af9cd TT |
6703 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6704 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6705 | |
6706 | /* Read in the die, but leave space to copy over the attributes | |
6707 | from the stub. This has the benefit of simplifying the rest of | |
6708 | the code - all the work to maintain the illusion of a single | |
6709 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6710 | num_extra_attrs = ((stmt_list != NULL) | |
6711 | + (low_pc != NULL) | |
6712 | + (high_pc != NULL) | |
6713 | + (ranges != NULL) | |
6714 | + (comp_dir != NULL)); | |
6715 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6716 | num_extra_attrs); |
b0c7bfa9 DE |
6717 | |
6718 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6719 | comp_unit_die = *result_comp_unit_die; | |
6720 | i = comp_unit_die->num_attrs; | |
6721 | if (stmt_list != NULL) | |
6722 | comp_unit_die->attrs[i++] = *stmt_list; | |
6723 | if (low_pc != NULL) | |
6724 | comp_unit_die->attrs[i++] = *low_pc; | |
6725 | if (high_pc != NULL) | |
6726 | comp_unit_die->attrs[i++] = *high_pc; | |
6727 | if (ranges != NULL) | |
6728 | comp_unit_die->attrs[i++] = *ranges; | |
6729 | if (comp_dir != NULL) | |
6730 | comp_unit_die->attrs[i++] = *comp_dir; | |
6731 | comp_unit_die->num_attrs += num_extra_attrs; | |
6732 | ||
b4f54984 | 6733 | if (dwarf_die_debug) |
bf6af496 DE |
6734 | { |
6735 | fprintf_unfiltered (gdb_stdlog, | |
6736 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6737 | section->get_name (), |
bf6af496 DE |
6738 | (unsigned) (begin_info_ptr - section->buffer), |
6739 | bfd_get_filename (abfd)); | |
b4f54984 | 6740 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6741 | } |
6742 | ||
b0c7bfa9 DE |
6743 | /* Skip dummy compilation units. */ |
6744 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6745 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6746 | return 0; | |
6747 | ||
6748 | *result_info_ptr = info_ptr; | |
6749 | return 1; | |
6750 | } | |
6751 | ||
a084a2a6 AT |
6752 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6753 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6754 | signature is part of the header. */ | |
6755 | static gdb::optional<ULONGEST> | |
6756 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6757 | { | |
6758 | if (cu->header.version >= 5) | |
6759 | return cu->header.signature; | |
6760 | struct attribute *attr; | |
6761 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6762 | if (attr == nullptr) | |
6763 | return gdb::optional<ULONGEST> (); | |
6764 | return DW_UNSND (attr); | |
6765 | } | |
6766 | ||
c0ab21c2 | 6767 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6768 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6769 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6770 | |
6771 | static struct dwo_unit * | |
6772 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
c0ab21c2 TT |
6773 | struct die_info *comp_unit_die, |
6774 | const char *dwo_name) | |
b0c7bfa9 DE |
6775 | { |
6776 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6777 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6778 | const char *comp_dir; |
b0c7bfa9 | 6779 | |
a2ce51a0 DE |
6780 | gdb_assert (cu != NULL); |
6781 | ||
b0c7bfa9 | 6782 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6783 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6784 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
6785 | |
6786 | if (this_cu->is_debug_types) | |
6787 | { | |
6788 | struct signatured_type *sig_type; | |
6789 | ||
6790 | /* Since this_cu is the first member of struct signatured_type, | |
6791 | we can go from a pointer to one to a pointer to the other. */ | |
6792 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
6793 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
6794 | } | |
6795 | else | |
6796 | { | |
a084a2a6 AT |
6797 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
6798 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
6799 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6800 | " [in module %s]"), | |
e3b94546 | 6801 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 6802 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 6803 | *signature); |
b0c7bfa9 DE |
6804 | } |
6805 | ||
b0c7bfa9 DE |
6806 | return dwo_unit; |
6807 | } | |
6808 | ||
c0ab21c2 | 6809 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6810 | See it for a description of the parameters. |
fcd3b13d | 6811 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6812 | |
c0ab21c2 TT |
6813 | void |
6814 | cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 6815 | int use_existing_cu) |
a2ce51a0 | 6816 | { |
a2ce51a0 | 6817 | struct signatured_type *sig_type; |
a2ce51a0 DE |
6818 | |
6819 | /* Verify we can do the following downcast, and that we have the | |
6820 | data we need. */ | |
6821 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6822 | sig_type = (struct signatured_type *) this_cu; | |
6823 | gdb_assert (sig_type->dwo_unit != NULL); | |
6824 | ||
6aa5f3a6 DE |
6825 | if (use_existing_cu && this_cu->cu != NULL) |
6826 | { | |
6827 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6828 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6829 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6830 | } |
6831 | else | |
6832 | { | |
6833 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6834 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 | 6835 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
6836 | } |
6837 | ||
6838 | /* A future optimization, if needed, would be to use an existing | |
6839 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6840 | could share abbrev tables. */ | |
a2ce51a0 DE |
6841 | |
6842 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
a2ce51a0 DE |
6843 | NULL /* stub_comp_unit_die */, |
6844 | sig_type->dwo_unit->dwo_file->comp_dir, | |
4ebe4877 | 6845 | this, &info_ptr, |
3e225074 | 6846 | &comp_unit_die, |
c0ab21c2 | 6847 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6848 | { |
6849 | /* Dummy die. */ | |
c0ab21c2 | 6850 | dummy_p = true; |
a2ce51a0 | 6851 | } |
a2ce51a0 DE |
6852 | } |
6853 | ||
fd820528 | 6854 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6855 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6856 | |
f4dc4d17 DE |
6857 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6858 | Otherwise the table specified in the comp unit header is read in and used. | |
6859 | This is an optimization for when we already have the abbrev table. | |
6860 | ||
dee91e82 | 6861 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6751ebae | 6862 | Otherwise, a new CU is allocated with xmalloc. */ |
aaa75496 | 6863 | |
c0ab21c2 TT |
6864 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
6865 | struct abbrev_table *abbrev_table, | |
6751ebae | 6866 | int use_existing_cu, |
c0ab21c2 TT |
6867 | bool skip_partial) |
6868 | : die_reader_specs {}, | |
6751ebae | 6869 | m_this_cu (this_cu) |
c906108c | 6870 | { |
ed2dc618 | 6871 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 6872 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6873 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6874 | bfd *abfd = section->get_bfd_owner (); |
dee91e82 | 6875 | struct dwarf2_cu *cu; |
c0ab21c2 | 6876 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6877 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6878 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6879 | /* Non-zero if CU currently points to a DWO file and we need to |
6880 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6881 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6882 | int rereading_dwo_cu = 0; |
c906108c | 6883 | |
b4f54984 | 6884 | if (dwarf_die_debug) |
9d8780f0 | 6885 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6886 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6887 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6888 | |
a2ce51a0 DE |
6889 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6890 | file (instead of going through the stub), short-circuit all of this. */ | |
6891 | if (this_cu->reading_dwo_directly) | |
6892 | { | |
6893 | /* Narrow down the scope of possibilities to have to understand. */ | |
6894 | gdb_assert (this_cu->is_debug_types); | |
6895 | gdb_assert (abbrev_table == NULL); | |
6751ebae | 6896 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu); |
a2ce51a0 DE |
6897 | return; |
6898 | } | |
6899 | ||
dee91e82 | 6900 | /* This is cheap if the section is already read in. */ |
96b79293 | 6901 | section->read (objfile); |
dee91e82 | 6902 | |
9c541725 | 6903 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6904 | |
6905 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6906 | |
6907 | if (use_existing_cu && this_cu->cu != NULL) | |
6908 | { | |
6909 | cu = this_cu->cu; | |
42e7ad6c DE |
6910 | /* If this CU is from a DWO file we need to start over, we need to |
6911 | refetch the attributes from the skeleton CU. | |
6912 | This could be optimized by retrieving those attributes from when we | |
6913 | were here the first time: the previous comp_unit_die was stored in | |
6914 | comp_unit_obstack. But there's no data yet that we need this | |
6915 | optimization. */ | |
6916 | if (cu->dwo_unit != NULL) | |
6917 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6918 | } |
6919 | else | |
6920 | { | |
6921 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6922 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 TT |
6923 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6924 | cu = m_new_cu.get (); | |
42e7ad6c | 6925 | } |
dee91e82 | 6926 | |
b0c7bfa9 | 6927 | /* Get the header. */ |
9c541725 | 6928 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6929 | { |
6930 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6931 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6932 | } |
6933 | else | |
6934 | { | |
3019eac3 | 6935 | if (this_cu->is_debug_types) |
dee91e82 | 6936 | { |
ed2dc618 SM |
6937 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6938 | &cu->header, section, | |
4bdcc0c1 | 6939 | abbrev_section, info_ptr, |
43988095 | 6940 | rcuh_kind::TYPE); |
dee91e82 | 6941 | |
42e7ad6c DE |
6942 | /* Since per_cu is the first member of struct signatured_type, |
6943 | we can go from a pointer to one to a pointer to the other. */ | |
6944 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6945 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6946 | gdb_assert (sig_type->type_offset_in_tu |
6947 | == cu->header.type_cu_offset_in_tu); | |
6948 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6949 | |
42e7ad6c DE |
6950 | /* LENGTH has not been set yet for type units if we're |
6951 | using .gdb_index. */ | |
4057dfde | 6952 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6953 | |
6954 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6955 | sig_type->type_offset_in_section = |
6956 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6957 | |
6958 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6959 | } |
6960 | else | |
6961 | { | |
ed2dc618 SM |
6962 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6963 | &cu->header, section, | |
4bdcc0c1 | 6964 | abbrev_section, |
43988095 JK |
6965 | info_ptr, |
6966 | rcuh_kind::COMPILE); | |
dee91e82 | 6967 | |
9c541725 | 6968 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
3ee6bb11 TV |
6969 | if (this_cu->length == 0) |
6970 | this_cu->length = cu->header.get_length (); | |
6971 | else | |
6972 | gdb_assert (this_cu->length == cu->header.get_length ()); | |
43988095 | 6973 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6974 | } |
6975 | } | |
10b3939b | 6976 | |
6caca83c | 6977 | /* Skip dummy compilation units. */ |
dee91e82 | 6978 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6979 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6980 | { |
6981 | dummy_p = true; | |
6982 | return; | |
6983 | } | |
6caca83c | 6984 | |
433df2d4 DE |
6985 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6986 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6987 | done. */ |
f4dc4d17 | 6988 | if (abbrev_table != NULL) |
685af9cd TT |
6989 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6990 | else | |
f4dc4d17 | 6991 | { |
c0ab21c2 | 6992 | m_abbrev_table_holder |
86de1d91 TT |
6993 | = abbrev_table::read (objfile, abbrev_section, |
6994 | cu->header.abbrev_sect_off); | |
c0ab21c2 | 6995 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6996 | } |
af703f96 | 6997 | |
dee91e82 | 6998 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6999 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 7000 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 7001 | |
58f0c718 | 7002 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
7003 | { |
7004 | dummy_p = true; | |
7005 | return; | |
7006 | } | |
58f0c718 | 7007 | |
b0c7bfa9 | 7008 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
7009 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
7010 | table from the DWO file and pass the ownership over to us. It will be | |
7011 | referenced from READER, so we must make sure to free it after we're done | |
7012 | with READER. | |
7013 | ||
b0c7bfa9 DE |
7014 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
7015 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 7016 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 7017 | if (dwo_name != nullptr) |
3019eac3 | 7018 | { |
3019eac3 | 7019 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7020 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 7021 | |
3e225074 | 7022 | if (comp_unit_die->has_children) |
6a506a2d | 7023 | { |
b98664d3 | 7024 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
7025 | " has children (offset %s) [in module %s]"), |
7026 | sect_offset_str (this_cu->sect_off), | |
7027 | bfd_get_filename (abfd)); | |
6a506a2d | 7028 | } |
c0ab21c2 | 7029 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die, dwo_name); |
6a506a2d | 7030 | if (dwo_unit != NULL) |
3019eac3 | 7031 | { |
6a506a2d | 7032 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 7033 | comp_unit_die, NULL, |
c0ab21c2 | 7034 | this, &info_ptr, |
3e225074 | 7035 | &dwo_comp_unit_die, |
c0ab21c2 | 7036 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
7037 | { |
7038 | /* Dummy die. */ | |
c0ab21c2 | 7039 | dummy_p = true; |
6a506a2d DE |
7040 | return; |
7041 | } | |
7042 | comp_unit_die = dwo_comp_unit_die; | |
7043 | } | |
7044 | else | |
7045 | { | |
7046 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7047 | the stub. A complaint has already been logged. There's | |
7048 | not much more we can do except pass on the stub DIE to | |
7049 | die_reader_func. We don't want to throw an error on bad | |
7050 | debug info. */ | |
3019eac3 DE |
7051 | } |
7052 | } | |
c0ab21c2 | 7053 | } |
3019eac3 | 7054 | |
6751ebae TT |
7055 | void |
7056 | cutu_reader::keep () | |
c0ab21c2 | 7057 | { |
b0c7bfa9 | 7058 | /* Done, clean up. */ |
6751ebae TT |
7059 | gdb_assert (!dummy_p); |
7060 | if (m_new_cu != NULL) | |
348e048f | 7061 | { |
c0ab21c2 TT |
7062 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7063 | = m_this_cu->dwarf2_per_objfile; | |
fcd3b13d | 7064 | /* Link this CU into read_in_chain. */ |
c0ab21c2 TT |
7065 | m_this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
7066 | dwarf2_per_objfile->read_in_chain = m_this_cu; | |
fcd3b13d | 7067 | /* The chain owns it now. */ |
c0ab21c2 | 7068 | m_new_cu.release (); |
348e048f | 7069 | } |
dee91e82 DE |
7070 | } |
7071 | ||
18a8505e AT |
7072 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
7073 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
7074 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7075 | |
7076 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7077 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7078 | |
7079 | We fill in THIS_CU->length. | |
7080 | ||
dee91e82 | 7081 | THIS_CU->cu is always freed when done. |
3019eac3 | 7082 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
7083 | to care whether it refers to the "main" CU or the DWO CU. |
7084 | ||
7085 | When parent_cu is passed, it is used to provide a default value for | |
7086 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 7087 | |
c0ab21c2 TT |
7088 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
7089 | struct dwarf2_cu *parent_cu, | |
7090 | struct dwo_file *dwo_file) | |
7091 | : die_reader_specs {}, | |
7092 | m_this_cu (this_cu) | |
dee91e82 | 7093 | { |
ed2dc618 | 7094 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7095 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7096 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 7097 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 7098 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7099 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7100 | |
b4f54984 | 7101 | if (dwarf_die_debug) |
9d8780f0 | 7102 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7103 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7104 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7105 | |
dee91e82 DE |
7106 | gdb_assert (this_cu->cu == NULL); |
7107 | ||
33e80786 DE |
7108 | abbrev_section = (dwo_file != NULL |
7109 | ? &dwo_file->sections.abbrev | |
7110 | : get_abbrev_section_for_cu (this_cu)); | |
7111 | ||
dee91e82 | 7112 | /* This is cheap if the section is already read in. */ |
96b79293 | 7113 | section->read (objfile); |
dee91e82 | 7114 | |
c0ab21c2 | 7115 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
dee91e82 | 7116 | |
9c541725 | 7117 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 | 7118 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
c0ab21c2 | 7119 | &m_new_cu->header, section, |
4bdcc0c1 | 7120 | abbrev_section, info_ptr, |
43988095 JK |
7121 | (this_cu->is_debug_types |
7122 | ? rcuh_kind::TYPE | |
7123 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7124 | |
18a8505e AT |
7125 | if (parent_cu != nullptr) |
7126 | { | |
c0ab21c2 TT |
7127 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
7128 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 7129 | } |
4057dfde | 7130 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
7131 | |
7132 | /* Skip dummy compilation units. */ | |
7133 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7134 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
7135 | { |
7136 | dummy_p = true; | |
7137 | return; | |
7138 | } | |
72bf9492 | 7139 | |
c0ab21c2 | 7140 | m_abbrev_table_holder |
86de1d91 TT |
7141 | = abbrev_table::read (objfile, abbrev_section, |
7142 | m_new_cu->header.abbrev_sect_off); | |
dee91e82 | 7143 | |
c0ab21c2 TT |
7144 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
7145 | m_abbrev_table_holder.get ()); | |
3e225074 | 7146 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
7147 | } |
7148 | ||
0018ea6f DE |
7149 | \f |
7150 | /* Type Unit Groups. | |
dee91e82 | 7151 | |
0018ea6f DE |
7152 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7153 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7154 | so that all types coming from the same compilation (.o file) are grouped | |
7155 | together. A future step could be to put the types in the same symtab as | |
7156 | the CU the types ultimately came from. */ | |
ff013f42 | 7157 | |
f4dc4d17 DE |
7158 | static hashval_t |
7159 | hash_type_unit_group (const void *item) | |
7160 | { | |
9a3c8263 SM |
7161 | const struct type_unit_group *tu_group |
7162 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7163 | |
094b34ac | 7164 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7165 | } |
348e048f DE |
7166 | |
7167 | static int | |
f4dc4d17 | 7168 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7169 | { |
9a3c8263 SM |
7170 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7171 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7172 | |
094b34ac | 7173 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7174 | } |
348e048f | 7175 | |
f4dc4d17 DE |
7176 | /* Allocate a hash table for type unit groups. */ |
7177 | ||
eaa5fa8b | 7178 | static htab_up |
298e9637 | 7179 | allocate_type_unit_groups_table () |
f4dc4d17 | 7180 | { |
eaa5fa8b TT |
7181 | return htab_up (htab_create_alloc (3, |
7182 | hash_type_unit_group, | |
7183 | eq_type_unit_group, | |
7184 | NULL, xcalloc, xfree)); | |
f4dc4d17 | 7185 | } |
dee91e82 | 7186 | |
f4dc4d17 DE |
7187 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7188 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7189 | of any one psymtab grow too big. */ | |
7190 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7191 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7192 | |
094b34ac | 7193 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7194 | Create the type_unit_group object used to hold one or more TUs. */ |
7195 | ||
7196 | static struct type_unit_group * | |
094b34ac | 7197 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7198 | { |
518817b3 SM |
7199 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7200 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7201 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7202 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7203 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7204 | |
7205 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7206 | struct type_unit_group); | |
094b34ac | 7207 | per_cu = &tu_group->per_cu; |
518817b3 | 7208 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7209 | |
094b34ac DE |
7210 | if (dwarf2_per_objfile->using_index) |
7211 | { | |
7212 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7213 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7214 | } |
7215 | else | |
7216 | { | |
9c541725 | 7217 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 7218 | dwarf2_psymtab *pst; |
528e1572 | 7219 | std::string name; |
094b34ac DE |
7220 | |
7221 | /* Give the symtab a useful name for debug purposes. */ | |
7222 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7223 | name = string_printf ("<type_units_%d>", |
7224 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7225 | else |
528e1572 | 7226 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7227 | |
528e1572 | 7228 | pst = create_partial_symtab (per_cu, name.c_str ()); |
6d94535f | 7229 | pst->anonymous = true; |
094b34ac | 7230 | } |
f4dc4d17 | 7231 | |
094b34ac | 7232 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7233 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7234 | |
7235 | return tu_group; | |
7236 | } | |
7237 | ||
094b34ac DE |
7238 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7239 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7240 | |
7241 | static struct type_unit_group * | |
ff39bb5e | 7242 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7243 | { |
518817b3 SM |
7244 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7245 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7246 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7247 | struct type_unit_group *tu_group; | |
7248 | void **slot; | |
7249 | unsigned int line_offset; | |
7250 | struct type_unit_group type_unit_group_for_lookup; | |
7251 | ||
7252 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
298e9637 | 7253 | dwarf2_per_objfile->type_unit_groups = allocate_type_unit_groups_table (); |
f4dc4d17 DE |
7254 | |
7255 | /* Do we need to create a new group, or can we use an existing one? */ | |
7256 | ||
7257 | if (stmt_list) | |
7258 | { | |
7259 | line_offset = DW_UNSND (stmt_list); | |
7260 | ++tu_stats->nr_symtab_sharers; | |
7261 | } | |
7262 | else | |
7263 | { | |
7264 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7265 | We can do various things here like create one group per TU or | |
7266 | spread them over multiple groups to split up the expansion work. | |
7267 | To avoid worst case scenarios (too many groups or too large groups) | |
7268 | we, umm, group them in bunches. */ | |
7269 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7270 | | (tu_stats->nr_stmt_less_type_units | |
7271 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7272 | ++tu_stats->nr_stmt_less_type_units; | |
7273 | } | |
7274 | ||
094b34ac | 7275 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7276 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
eaa5fa8b | 7277 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups.get (), |
f4dc4d17 DE |
7278 | &type_unit_group_for_lookup, INSERT); |
7279 | if (*slot != NULL) | |
7280 | { | |
9a3c8263 | 7281 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7282 | gdb_assert (tu_group != NULL); |
7283 | } | |
7284 | else | |
7285 | { | |
9c541725 | 7286 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7287 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7288 | *slot = tu_group; |
7289 | ++tu_stats->nr_symtabs; | |
7290 | } | |
7291 | ||
7292 | return tu_group; | |
7293 | } | |
0018ea6f DE |
7294 | \f |
7295 | /* Partial symbol tables. */ | |
7296 | ||
7297 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7298 | ||
7299 | The caller must fill in the following details: | |
7300 | dirname, textlow, texthigh. */ | |
7301 | ||
891813be | 7302 | static dwarf2_psymtab * |
0018ea6f DE |
7303 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
7304 | { | |
e3b94546 | 7305 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
891813be | 7306 | dwarf2_psymtab *pst; |
0018ea6f | 7307 | |
9f4e76a4 | 7308 | pst = new dwarf2_psymtab (name, objfile, per_cu); |
0018ea6f | 7309 | |
6d94535f | 7310 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
7311 | |
7312 | /* This is the glue that links PST into GDB's symbol API. */ | |
0018ea6f DE |
7313 | per_cu->v.psymtab = pst; |
7314 | ||
7315 | return pst; | |
7316 | } | |
7317 | ||
c0ab21c2 | 7318 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
7319 | |
7320 | static void | |
7321 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7322 | const gdb_byte *info_ptr, |
0018ea6f | 7323 | struct die_info *comp_unit_die, |
c0ab21c2 | 7324 | enum language pretend_language) |
0018ea6f DE |
7325 | { |
7326 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7327 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 7328 | struct gdbarch *gdbarch = objfile->arch (); |
0018ea6f | 7329 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7330 | CORE_ADDR baseaddr; |
7331 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 7332 | dwarf2_psymtab *pst; |
3a2b436a | 7333 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7334 | const char *filename; |
0018ea6f | 7335 | |
0018ea6f DE |
7336 | gdb_assert (! per_cu->is_debug_types); |
7337 | ||
c0ab21c2 | 7338 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 7339 | |
0018ea6f | 7340 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
7341 | gdb::unique_xmalloc_ptr<char> debug_filename; |
7342 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
7343 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7344 | if (filename == NULL) | |
0018ea6f | 7345 | filename = ""; |
2e927613 TV |
7346 | else if (strcmp (filename, artificial) == 0) |
7347 | { | |
7348 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
7349 | sect_offset_str (per_cu->sect_off), |
7350 | (char *) NULL)); | |
2e927613 TV |
7351 | filename = debug_filename.get (); |
7352 | } | |
0018ea6f DE |
7353 | |
7354 | pst = create_partial_symtab (per_cu, filename); | |
7355 | ||
7356 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7357 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 7358 | |
b3b3bada | 7359 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
7360 | |
7361 | dwarf2_find_base_address (comp_unit_die, cu); | |
7362 | ||
7363 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7364 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7365 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7366 | &best_highpc, cu, pst); | |
7367 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
7368 | { |
7369 | CORE_ADDR low | |
7370 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
7371 | - baseaddr); | |
7372 | CORE_ADDR high | |
7373 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
7374 | - baseaddr - 1); | |
7375 | /* Store the contiguous range if it is not empty; it can be | |
7376 | empty for CUs with no code. */ | |
d320c2b5 TT |
7377 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
7378 | low, high, pst); | |
79748972 | 7379 | } |
0018ea6f DE |
7380 | |
7381 | /* Check if comp unit has_children. | |
7382 | If so, read the rest of the partial symbols from this comp unit. | |
7383 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7384 | if (comp_unit_die->has_children) |
0018ea6f DE |
7385 | { |
7386 | struct partial_die_info *first_die; | |
7387 | CORE_ADDR lowpc, highpc; | |
7388 | ||
7389 | lowpc = ((CORE_ADDR) -1); | |
7390 | highpc = ((CORE_ADDR) 0); | |
7391 | ||
7392 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7393 | ||
7394 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7395 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7396 | |
7397 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7398 | complaints from `maint check'. */ | |
7399 | if (lowpc == ((CORE_ADDR) -1)) | |
7400 | lowpc = highpc; | |
7401 | ||
7402 | /* If the compilation unit didn't have an explicit address range, | |
7403 | then use the information extracted from its child dies. */ | |
e385593e | 7404 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7405 | { |
7406 | best_lowpc = lowpc; | |
7407 | best_highpc = highpc; | |
7408 | } | |
7409 | } | |
4ae976d1 | 7410 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7411 | best_lowpc + baseaddr) |
7412 | - baseaddr); | |
4ae976d1 | 7413 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7414 | best_highpc + baseaddr) |
7415 | - baseaddr); | |
0018ea6f | 7416 | |
8763cede | 7417 | end_psymtab_common (objfile, pst); |
0018ea6f | 7418 | |
ae640021 | 7419 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
7420 | { |
7421 | int i; | |
ae640021 | 7422 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
7423 | |
7424 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7425 | post-pass. */ | |
7426 | pst->number_of_dependencies = len; | |
a9342b62 TT |
7427 | pst->dependencies |
7428 | = objfile->partial_symtabs->allocate_dependencies (len); | |
ae640021 AB |
7429 | for (i = 0; i < len; ++i) |
7430 | { | |
7431 | pst->dependencies[i] | |
7432 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
7433 | } | |
0018ea6f | 7434 | |
ae640021 | 7435 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
7436 | } |
7437 | ||
7438 | /* Get the list of files included in the current compilation unit, | |
7439 | and build a psymtab for each of them. */ | |
7440 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7441 | ||
b4f54984 | 7442 | if (dwarf_read_debug) |
b926417a TT |
7443 | fprintf_unfiltered (gdb_stdlog, |
7444 | "Psymtab for %s unit @%s: %s - %s" | |
7445 | ", %d global, %d static syms\n", | |
7446 | per_cu->is_debug_types ? "type" : "comp", | |
7447 | sect_offset_str (per_cu->sect_off), | |
7448 | paddress (gdbarch, pst->text_low (objfile)), | |
7449 | paddress (gdbarch, pst->text_high (objfile)), | |
7450 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
7451 | } |
7452 | ||
7453 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7454 | Process compilation unit THIS_CU for a psymtab. */ | |
7455 | ||
7456 | static void | |
7457 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
135f5437 | 7458 | bool want_partial_unit, |
b93601f3 | 7459 | enum language pretend_language) |
0018ea6f DE |
7460 | { |
7461 | /* If this compilation unit was already read in, free the | |
7462 | cached copy in order to read it in again. This is | |
7463 | necessary because we skipped some symbols when we first | |
7464 | read in the compilation unit (see load_partial_dies). | |
7465 | This problem could be avoided, but the benefit is unclear. */ | |
7466 | if (this_cu->cu != NULL) | |
7467 | free_one_cached_comp_unit (this_cu); | |
7468 | ||
6751ebae | 7469 | cutu_reader reader (this_cu, NULL, 0, false); |
c0ab21c2 | 7470 | |
58990295 TV |
7471 | switch (reader.comp_unit_die->tag) |
7472 | { | |
7473 | case DW_TAG_compile_unit: | |
7474 | this_cu->unit_type = DW_UT_compile; | |
7475 | break; | |
7476 | case DW_TAG_partial_unit: | |
7477 | this_cu->unit_type = DW_UT_partial; | |
7478 | break; | |
7479 | default: | |
7480 | abort (); | |
7481 | } | |
7482 | ||
c0ab21c2 | 7483 | if (reader.dummy_p) |
f1902523 | 7484 | { |
c0ab21c2 | 7485 | /* Nothing. */ |
f1902523 | 7486 | } |
c0ab21c2 | 7487 | else if (this_cu->is_debug_types) |
3e225074 TT |
7488 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7489 | reader.comp_unit_die); | |
135f5437 TT |
7490 | else if (want_partial_unit |
7491 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7492 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7493 | reader.comp_unit_die, | |
c0ab21c2 | 7494 | pretend_language); |
0018ea6f | 7495 | |
58990295 TV |
7496 | this_cu->lang = this_cu->cu->language; |
7497 | ||
0018ea6f | 7498 | /* Age out any secondary CUs. */ |
ed2dc618 | 7499 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 7500 | } |
f4dc4d17 DE |
7501 | |
7502 | /* Reader function for build_type_psymtabs. */ | |
7503 | ||
7504 | static void | |
7505 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7506 | const gdb_byte *info_ptr, |
3e225074 | 7507 | struct die_info *type_unit_die) |
f4dc4d17 | 7508 | { |
ed2dc618 | 7509 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 7510 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
7511 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7512 | struct dwarf2_cu *cu = reader->cu; | |
7513 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7514 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7515 | struct type_unit_group *tu_group; |
7516 | struct attribute *attr; | |
7517 | struct partial_die_info *first_die; | |
7518 | CORE_ADDR lowpc, highpc; | |
891813be | 7519 | dwarf2_psymtab *pst; |
f4dc4d17 | 7520 | |
0186c6a7 DE |
7521 | gdb_assert (per_cu->is_debug_types); |
7522 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7523 | |
3e225074 | 7524 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7525 | return; |
7526 | ||
052c8bb8 | 7527 | attr = type_unit_die->attr (DW_AT_stmt_list); |
094b34ac | 7528 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7529 | |
df07e2c7 | 7530 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7531 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7532 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7533 | |
7534 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 | 7535 | pst = create_partial_symtab (per_cu, ""); |
6d94535f | 7536 | pst->anonymous = true; |
f4dc4d17 DE |
7537 | |
7538 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7539 | ||
7540 | lowpc = (CORE_ADDR) -1; | |
7541 | highpc = (CORE_ADDR) 0; | |
7542 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7543 | ||
8763cede | 7544 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7545 | } |
7546 | ||
73051182 DE |
7547 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7548 | ||
7549 | struct tu_abbrev_offset | |
7550 | { | |
b2bdb8cf SM |
7551 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7552 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7553 | {} | |
7554 | ||
7555 | signatured_type *sig_type; | |
73051182 DE |
7556 | sect_offset abbrev_offset; |
7557 | }; | |
7558 | ||
484cf504 | 7559 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 7560 | |
484cf504 TT |
7561 | static bool |
7562 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
7563 | const struct tu_abbrev_offset &b) | |
73051182 | 7564 | { |
484cf504 | 7565 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
7566 | } |
7567 | ||
7568 | /* Efficiently read all the type units. | |
7569 | This does the bulk of the work for build_type_psymtabs. | |
7570 | ||
7571 | The efficiency is because we sort TUs by the abbrev table they use and | |
7572 | only read each abbrev table once. In one program there are 200K TUs | |
7573 | sharing 8K abbrev tables. | |
7574 | ||
7575 | The main purpose of this function is to support building the | |
7576 | dwarf2_per_objfile->type_unit_groups table. | |
7577 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7578 | can collapse the search space by grouping them by stmt_list. | |
7579 | The savings can be significant, in the same program from above the 200K TUs | |
7580 | share 8K stmt_list tables. | |
7581 | ||
7582 | FUNC is expected to call get_type_unit_group, which will create the | |
7583 | struct type_unit_group if necessary and add it to | |
7584 | dwarf2_per_objfile->type_unit_groups. */ | |
7585 | ||
7586 | static void | |
ed2dc618 | 7587 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 7588 | { |
73051182 | 7589 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 7590 | abbrev_table_up abbrev_table; |
73051182 | 7591 | sect_offset abbrev_offset; |
73051182 DE |
7592 | |
7593 | /* It's up to the caller to not call us multiple times. */ | |
7594 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7595 | ||
b2bdb8cf | 7596 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
7597 | return; |
7598 | ||
7599 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7600 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7601 | read each abbrev table in. | |
7602 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7603 | This is simpler and efficient enough for now. | |
7604 | ||
7605 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7606 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7607 | stmt_list value too so in practice this should work well. | |
7608 | ||
7609 | The basic algorithm here is: | |
7610 | ||
7611 | sort TUs by abbrev table | |
7612 | for each TU with same abbrev table: | |
7613 | read abbrev table if first user | |
7614 | read TU top level DIE | |
7615 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7616 | call FUNC */ | |
7617 | ||
b4f54984 | 7618 | if (dwarf_read_debug) |
73051182 DE |
7619 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7620 | ||
7621 | /* Sort in a separate table to maintain the order of all_type_units | |
7622 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
7623 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
7624 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
7625 | ||
7626 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
7627 | sorted_by_abbrev.emplace_back | |
7628 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
7629 | sig_type->per_cu.section, | |
7630 | sig_type->per_cu.sect_off)); | |
73051182 | 7631 | |
484cf504 TT |
7632 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
7633 | sort_tu_by_abbrev_offset); | |
73051182 | 7634 | |
9c541725 | 7635 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7636 | |
b2bdb8cf | 7637 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7638 | { |
73051182 DE |
7639 | /* Switch to the next abbrev table if necessary. */ |
7640 | if (abbrev_table == NULL | |
b2bdb8cf | 7641 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7642 | { |
b2bdb8cf | 7643 | abbrev_offset = tu.abbrev_offset; |
73051182 | 7644 | abbrev_table = |
86de1d91 TT |
7645 | abbrev_table::read (dwarf2_per_objfile->objfile, |
7646 | &dwarf2_per_objfile->abbrev, | |
7647 | abbrev_offset); | |
73051182 DE |
7648 | ++tu_stats->nr_uniq_abbrev_tables; |
7649 | } | |
7650 | ||
c0ab21c2 | 7651 | cutu_reader reader (&tu.sig_type->per_cu, abbrev_table.get (), |
6751ebae | 7652 | 0, false); |
c0ab21c2 TT |
7653 | if (!reader.dummy_p) |
7654 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7655 | reader.comp_unit_die); |
73051182 | 7656 | } |
6aa5f3a6 | 7657 | } |
73051182 | 7658 | |
6aa5f3a6 DE |
7659 | /* Print collected type unit statistics. */ |
7660 | ||
7661 | static void | |
ed2dc618 | 7662 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7663 | { |
7664 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7665 | ||
7666 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
7667 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
7668 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
7669 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
7670 | tu_stats->nr_uniq_abbrev_tables); | |
7671 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7672 | tu_stats->nr_symtabs); | |
7673 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7674 | tu_stats->nr_symtab_sharers); | |
7675 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7676 | tu_stats->nr_stmt_less_type_units); | |
7677 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7678 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7679 | } |
7680 | ||
f4dc4d17 DE |
7681 | /* Traversal function for build_type_psymtabs. */ |
7682 | ||
7683 | static int | |
7684 | build_type_psymtab_dependencies (void **slot, void *info) | |
7685 | { | |
ed2dc618 SM |
7686 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7687 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
7688 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7689 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7690 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
891813be | 7691 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
df07e2c7 | 7692 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7693 | int i; |
7694 | ||
7695 | gdb_assert (len > 0); | |
197400e8 | 7696 | gdb_assert (per_cu->type_unit_group_p ()); |
f4dc4d17 DE |
7697 | |
7698 | pst->number_of_dependencies = len; | |
a9342b62 | 7699 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7700 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7701 | { |
df07e2c7 | 7702 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
7703 | gdb_assert (iter->per_cu.is_debug_types); |
7704 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7705 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7706 | } |
7707 | ||
df07e2c7 AB |
7708 | delete tu_group->tus; |
7709 | tu_group->tus = nullptr; | |
348e048f DE |
7710 | |
7711 | return 1; | |
7712 | } | |
7713 | ||
7714 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7715 | Build partial symbol tables for the .debug_types comp-units. */ | |
7716 | ||
7717 | static void | |
ed2dc618 | 7718 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 7719 | { |
ed2dc618 | 7720 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
7721 | return; |
7722 | ||
ed2dc618 | 7723 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 7724 | } |
f4dc4d17 | 7725 | |
6aa5f3a6 DE |
7726 | /* Traversal function for process_skeletonless_type_unit. |
7727 | Read a TU in a DWO file and build partial symbols for it. */ | |
7728 | ||
7729 | static int | |
7730 | process_skeletonless_type_unit (void **slot, void *info) | |
7731 | { | |
7732 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
7733 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7734 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
7735 | struct signatured_type find_entry, *entry; |
7736 | ||
7737 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7738 | ||
7739 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 7740 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
6aa5f3a6 DE |
7741 | |
7742 | find_entry.signature = dwo_unit->signature; | |
b0b6a987 TT |
7743 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
7744 | &find_entry, INSERT); | |
6aa5f3a6 DE |
7745 | /* If we've already seen this type there's nothing to do. What's happening |
7746 | is we're doing our own version of comdat-folding here. */ | |
7747 | if (*slot != NULL) | |
7748 | return 1; | |
7749 | ||
7750 | /* This does the job that create_all_type_units would have done for | |
7751 | this TU. */ | |
ed2dc618 SM |
7752 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
7753 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7754 | *slot = entry; |
7755 | ||
7756 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6751ebae | 7757 | cutu_reader reader (&entry->per_cu, NULL, 0, false); |
c0ab21c2 TT |
7758 | if (!reader.dummy_p) |
7759 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7760 | reader.comp_unit_die); |
6aa5f3a6 DE |
7761 | |
7762 | return 1; | |
7763 | } | |
7764 | ||
7765 | /* Traversal function for process_skeletonless_type_units. */ | |
7766 | ||
7767 | static int | |
7768 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7769 | { | |
7770 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7771 | ||
7772 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7773 | htab_traverse_noresize (dwo_file->tus.get (), |
7774 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7775 | |
7776 | return 1; | |
7777 | } | |
7778 | ||
7779 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7780 | This is needed in case a TU was emitted without its skeleton. | |
7781 | Note: This can't be done until we know what all the DWO files are. */ | |
7782 | ||
7783 | static void | |
ed2dc618 | 7784 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7785 | { |
7786 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 7787 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
7788 | && dwarf2_per_objfile->dwo_files != NULL) |
7789 | { | |
51ac9db5 | 7790 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 7791 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 7792 | dwarf2_per_objfile); |
6aa5f3a6 | 7793 | } |
348e048f DE |
7794 | } |
7795 | ||
ed2dc618 | 7796 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7797 | |
7798 | static void | |
ed2dc618 | 7799 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 7800 | { |
b76e467d | 7801 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 7802 | { |
891813be | 7803 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7804 | |
36586728 TT |
7805 | if (pst == NULL) |
7806 | continue; | |
7807 | ||
b76e467d | 7808 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7809 | { |
7810 | /* Set the 'user' field only if it is not already set. */ | |
7811 | if (pst->dependencies[j]->user == NULL) | |
7812 | pst->dependencies[j]->user = pst; | |
7813 | } | |
7814 | } | |
7815 | } | |
7816 | ||
93311388 DE |
7817 | /* Build the partial symbol table by doing a quick pass through the |
7818 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7819 | |
93311388 | 7820 | static void |
ed2dc618 | 7821 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 7822 | { |
ed2dc618 | 7823 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 7824 | |
b4f54984 | 7825 | if (dwarf_read_debug) |
45cfd468 DE |
7826 | { |
7827 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7828 | objfile_name (objfile)); |
45cfd468 DE |
7829 | } |
7830 | ||
76935768 TT |
7831 | scoped_restore restore_reading_psyms |
7832 | = make_scoped_restore (&dwarf2_per_objfile->reading_partial_symbols, | |
7833 | true); | |
98bfdba5 | 7834 | |
96b79293 | 7835 | dwarf2_per_objfile->info.read (objfile); |
91c24f0a | 7836 | |
93311388 DE |
7837 | /* Any cached compilation units will be linked by the per-objfile |
7838 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 7839 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 7840 | |
ed2dc618 | 7841 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 7842 | |
ed2dc618 | 7843 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 7844 | |
60606b2c TT |
7845 | /* Create a temporary address map on a temporary obstack. We later |
7846 | copy this to the final obstack. */ | |
8268c778 | 7847 | auto_obstack temp_obstack; |
791afaa2 TT |
7848 | |
7849 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 7850 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7851 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7852 | |
b76e467d | 7853 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
3d5afab3 TV |
7854 | { |
7855 | if (per_cu->v.psymtab != NULL) | |
7856 | /* In case a forward DW_TAG_imported_unit has read the CU already. */ | |
7857 | continue; | |
7858 | process_psymtab_comp_unit (per_cu, false, language_minimal); | |
7859 | } | |
ff013f42 | 7860 | |
6aa5f3a6 | 7861 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 7862 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
7863 | |
7864 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7865 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7866 | { | |
eaa5fa8b | 7867 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups.get (), |
ed2dc618 | 7868 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
7869 | } |
7870 | ||
b4f54984 | 7871 | if (dwarf_read_debug) |
ed2dc618 | 7872 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 7873 | |
ed2dc618 | 7874 | set_partial_user (dwarf2_per_objfile); |
95554aad | 7875 | |
d320c2b5 TT |
7876 | objfile->partial_symtabs->psymtabs_addrmap |
7877 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 7878 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
7879 | /* At this point we want to keep the address map. */ |
7880 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7881 | |
b4f54984 | 7882 | if (dwarf_read_debug) |
45cfd468 | 7883 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7884 | objfile_name (objfile)); |
ae038cb0 DJ |
7885 | } |
7886 | ||
dee91e82 DE |
7887 | /* Load the partial DIEs for a secondary CU into memory. |
7888 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7889 | |
dee91e82 DE |
7890 | static void |
7891 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7892 | { | |
6751ebae | 7893 | cutu_reader reader (this_cu, NULL, 1, false); |
c0ab21c2 TT |
7894 | |
7895 | if (!reader.dummy_p) | |
7896 | { | |
7897 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7898 | language_minimal); | |
7899 | ||
7900 | /* Check if comp unit has_children. | |
7901 | If so, read the rest of the partial symbols from this comp unit. | |
7902 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7903 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7904 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7905 | |
7906 | reader.keep (); | |
c0ab21c2 | 7907 | } |
ae038cb0 DJ |
7908 | } |
7909 | ||
ae038cb0 | 7910 | static void |
ed2dc618 | 7911 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 7912 | struct dwarf2_section_info *section, |
f1902523 | 7913 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 7914 | unsigned int is_dwz) |
ae038cb0 | 7915 | { |
d521ce57 | 7916 | const gdb_byte *info_ptr; |
ed2dc618 | 7917 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 7918 | |
b4f54984 | 7919 | if (dwarf_read_debug) |
bf6af496 | 7920 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
96b79293 TT |
7921 | section->get_name (), |
7922 | section->get_file_name ()); | |
bf6af496 | 7923 | |
96b79293 | 7924 | section->read (objfile); |
ae038cb0 | 7925 | |
36586728 | 7926 | info_ptr = section->buffer; |
6e70227d | 7927 | |
36586728 | 7928 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7929 | { |
ae038cb0 | 7930 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7931 | |
9c541725 | 7932 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7933 | |
f1902523 | 7934 | comp_unit_head cu_header; |
ed2dc618 SM |
7935 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
7936 | abbrev_section, info_ptr, | |
7937 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7938 | |
7939 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7940 | if (cu_header.unit_type != DW_UT_type) |
7941 | { | |
7942 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7943 | struct dwarf2_per_cu_data); | |
7944 | memset (this_cu, 0, sizeof (*this_cu)); | |
7945 | } | |
7946 | else | |
7947 | { | |
7948 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7949 | struct signatured_type); | |
7950 | memset (sig_type, 0, sizeof (*sig_type)); | |
7951 | sig_type->signature = cu_header.signature; | |
7952 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7953 | this_cu = &sig_type->per_cu; | |
7954 | } | |
7955 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7956 | this_cu->sect_off = sect_off; |
f1902523 | 7957 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7958 | this_cu->is_dwz = is_dwz; |
e3b94546 | 7959 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 7960 | this_cu->section = section; |
ae038cb0 | 7961 | |
b76e467d | 7962 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
7963 | |
7964 | info_ptr = info_ptr + this_cu->length; | |
7965 | } | |
36586728 TT |
7966 | } |
7967 | ||
7968 | /* Create a list of all compilation units in OBJFILE. | |
7969 | This is only done for -readnow and building partial symtabs. */ | |
7970 | ||
7971 | static void | |
ed2dc618 | 7972 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 7973 | { |
b76e467d | 7974 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 7975 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 7976 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 7977 | |
b76e467d | 7978 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 7979 | if (dwz != NULL) |
ed2dc618 | 7980 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 7981 | 1); |
c906108c SS |
7982 | } |
7983 | ||
5734ee8b | 7984 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7985 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7986 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7987 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7988 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7989 | |
72bf9492 DJ |
7990 | static void |
7991 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7992 | CORE_ADDR *highpc, int set_addrmap, |
7993 | struct dwarf2_cu *cu) | |
c906108c | 7994 | { |
72bf9492 | 7995 | struct partial_die_info *pdi; |
c906108c | 7996 | |
91c24f0a DC |
7997 | /* Now, march along the PDI's, descending into ones which have |
7998 | interesting children but skipping the children of the other ones, | |
7999 | until we reach the end of the compilation unit. */ | |
c906108c | 8000 | |
72bf9492 | 8001 | pdi = first_die; |
91c24f0a | 8002 | |
72bf9492 DJ |
8003 | while (pdi != NULL) |
8004 | { | |
52356b79 | 8005 | pdi->fixup (cu); |
c906108c | 8006 | |
f55ee35c | 8007 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8008 | children, so we need to look at them. Ditto for anonymous |
8009 | enums. */ | |
933c6fe4 | 8010 | |
72bf9492 | 8011 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 8012 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
8013 | || pdi->tag == DW_TAG_imported_unit |
8014 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 8015 | { |
72bf9492 | 8016 | switch (pdi->tag) |
c906108c SS |
8017 | { |
8018 | case DW_TAG_subprogram: | |
b1dc1806 | 8019 | case DW_TAG_inlined_subroutine: |
cdc07690 | 8020 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8021 | break; |
72929c62 | 8022 | case DW_TAG_constant: |
c906108c SS |
8023 | case DW_TAG_variable: |
8024 | case DW_TAG_typedef: | |
91c24f0a | 8025 | case DW_TAG_union_type: |
317d2668 TV |
8026 | if (!pdi->is_declaration |
8027 | || (pdi->tag == DW_TAG_variable && pdi->is_external)) | |
63d06c5c | 8028 | { |
72bf9492 | 8029 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8030 | } |
8031 | break; | |
c906108c | 8032 | case DW_TAG_class_type: |
680b30c7 | 8033 | case DW_TAG_interface_type: |
c906108c | 8034 | case DW_TAG_structure_type: |
72bf9492 | 8035 | if (!pdi->is_declaration) |
c906108c | 8036 | { |
72bf9492 | 8037 | add_partial_symbol (pdi, cu); |
c906108c | 8038 | } |
b7fee5a3 KS |
8039 | if ((cu->language == language_rust |
8040 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
8041 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
8042 | set_addrmap, cu); | |
c906108c | 8043 | break; |
91c24f0a | 8044 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8045 | if (!pdi->is_declaration) |
8046 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8047 | break; |
8048 | case DW_TAG_base_type: | |
a02abb62 | 8049 | case DW_TAG_subrange_type: |
c906108c | 8050 | /* File scope base type definitions are added to the partial |
c5aa993b | 8051 | symbol table. */ |
72bf9492 | 8052 | add_partial_symbol (pdi, cu); |
c906108c | 8053 | break; |
d9fa45fe | 8054 | case DW_TAG_namespace: |
cdc07690 | 8055 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 8056 | break; |
5d7cb8df | 8057 | case DW_TAG_module: |
59c35742 AB |
8058 | if (!pdi->is_declaration) |
8059 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 8060 | break; |
95554aad TT |
8061 | case DW_TAG_imported_unit: |
8062 | { | |
8063 | struct dwarf2_per_cu_data *per_cu; | |
8064 | ||
f4dc4d17 DE |
8065 | /* For now we don't handle imported units in type units. */ |
8066 | if (cu->per_cu->is_debug_types) | |
8067 | { | |
8068 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8069 | " supported in type units [in module %s]"), | |
518817b3 | 8070 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8071 | } |
8072 | ||
e3b94546 SM |
8073 | per_cu = dwarf2_find_containing_comp_unit |
8074 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8075 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8076 | |
8077 | /* Go read the partial unit, if needed. */ | |
8078 | if (per_cu->v.psymtab == NULL) | |
135f5437 | 8079 | process_psymtab_comp_unit (per_cu, true, cu->language); |
95554aad | 8080 | |
ae640021 | 8081 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
8082 | } |
8083 | break; | |
74921315 KS |
8084 | case DW_TAG_imported_declaration: |
8085 | add_partial_symbol (pdi, cu); | |
8086 | break; | |
c906108c SS |
8087 | default: |
8088 | break; | |
8089 | } | |
8090 | } | |
8091 | ||
72bf9492 DJ |
8092 | /* If the die has a sibling, skip to the sibling. */ |
8093 | ||
8094 | pdi = pdi->die_sibling; | |
8095 | } | |
8096 | } | |
8097 | ||
8098 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8099 | |
72bf9492 | 8100 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8101 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8102 | Enumerators are an exception; they use the scope of their parent |
8103 | enumeration type, i.e. the name of the enumeration type is not | |
8104 | prepended to the enumerator. | |
91c24f0a | 8105 | |
72bf9492 DJ |
8106 | There are two complexities. One is DW_AT_specification; in this |
8107 | case "parent" means the parent of the target of the specification, | |
8108 | instead of the direct parent of the DIE. The other is compilers | |
8109 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8110 | the fully qualified name of structure types from their members' | |
8111 | linkage names. This must be done using the DIE's children rather | |
8112 | than the children of any DW_AT_specification target. We only need | |
8113 | to do this for structures at the top level, i.e. if the target of | |
8114 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8115 | have a parent. */ | |
8116 | ||
8117 | /* Compute the scope prefix associated with PDI's parent, in | |
8118 | compilation unit CU. The result will be allocated on CU's | |
8119 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8120 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8121 | static const char * |
72bf9492 DJ |
8122 | partial_die_parent_scope (struct partial_die_info *pdi, |
8123 | struct dwarf2_cu *cu) | |
8124 | { | |
15d034d0 | 8125 | const char *grandparent_scope; |
72bf9492 | 8126 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8127 | |
72bf9492 DJ |
8128 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8129 | then this means the parent of the specification DIE. */ | |
8130 | ||
8131 | real_pdi = pdi; | |
72bf9492 | 8132 | while (real_pdi->has_specification) |
fb816e8b | 8133 | { |
122cf0f2 AB |
8134 | auto res = find_partial_die (real_pdi->spec_offset, |
8135 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8136 | real_pdi = res.pdi; |
8137 | cu = res.cu; | |
8138 | } | |
72bf9492 DJ |
8139 | |
8140 | parent = real_pdi->die_parent; | |
8141 | if (parent == NULL) | |
8142 | return NULL; | |
8143 | ||
8144 | if (parent->scope_set) | |
8145 | return parent->scope; | |
8146 | ||
52356b79 | 8147 | parent->fixup (cu); |
72bf9492 | 8148 | |
10b3939b | 8149 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8150 | |
acebe513 UW |
8151 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8152 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8153 | Work around this problem here. */ | |
8154 | if (cu->language == language_cplus | |
6e70227d | 8155 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8156 | && strcmp (parent->name, "::") == 0 |
8157 | && grandparent_scope == NULL) | |
8158 | { | |
8159 | parent->scope = NULL; | |
8160 | parent->scope_set = 1; | |
8161 | return NULL; | |
8162 | } | |
8163 | ||
0a4b0913 | 8164 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8165 | if (pdi->tag == DW_TAG_enumerator) |
8166 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8167 | parent->scope = grandparent_scope; | |
8168 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8169 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8170 | || parent->tag == DW_TAG_structure_type |
8171 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8172 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8173 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8174 | || parent->tag == DW_TAG_enumeration_type |
8175 | || (cu->language == language_fortran | |
8176 | && parent->tag == DW_TAG_subprogram | |
8177 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8178 | { |
8179 | if (grandparent_scope == NULL) | |
8180 | parent->scope = parent->name; | |
8181 | else | |
3e43a32a MS |
8182 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8183 | grandparent_scope, | |
f55ee35c | 8184 | parent->name, 0, cu); |
72bf9492 | 8185 | } |
72bf9492 DJ |
8186 | else |
8187 | { | |
8188 | /* FIXME drow/2004-04-01: What should we be doing with | |
8189 | function-local names? For partial symbols, we should probably be | |
8190 | ignoring them. */ | |
fa9c3fa0 TT |
8191 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8192 | dwarf_tag_name (parent->tag), | |
8193 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8194 | parent->scope = grandparent_scope; |
c906108c SS |
8195 | } |
8196 | ||
72bf9492 DJ |
8197 | parent->scope_set = 1; |
8198 | return parent->scope; | |
8199 | } | |
8200 | ||
8201 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8202 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8203 | |
43816ebc | 8204 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
8205 | partial_die_full_name (struct partial_die_info *pdi, |
8206 | struct dwarf2_cu *cu) | |
8207 | { | |
15d034d0 | 8208 | const char *parent_scope; |
72bf9492 | 8209 | |
98bfdba5 PA |
8210 | /* If this is a template instantiation, we can not work out the |
8211 | template arguments from partial DIEs. So, unfortunately, we have | |
8212 | to go through the full DIEs. At least any work we do building | |
8213 | types here will be reused if full symbols are loaded later. */ | |
8214 | if (pdi->has_template_arguments) | |
8215 | { | |
52356b79 | 8216 | pdi->fixup (cu); |
98bfdba5 PA |
8217 | |
8218 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8219 | { | |
8220 | struct die_info *die; | |
8221 | struct attribute attr; | |
8222 | struct dwarf2_cu *ref_cu = cu; | |
8223 | ||
b64f50a1 | 8224 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8225 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8226 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8227 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8228 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8229 | ||
43816ebc | 8230 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
8231 | } |
8232 | } | |
8233 | ||
72bf9492 DJ |
8234 | parent_scope = partial_die_parent_scope (pdi, cu); |
8235 | if (parent_scope == NULL) | |
8236 | return NULL; | |
8237 | else | |
43816ebc TT |
8238 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
8239 | pdi->name, 0, cu)); | |
c906108c SS |
8240 | } |
8241 | ||
8242 | static void | |
72bf9492 | 8243 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8244 | { |
518817b3 SM |
8245 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8246 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8247 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 8248 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 8249 | CORE_ADDR addr = 0; |
15d034d0 | 8250 | const char *actual_name = NULL; |
e142c38c DJ |
8251 | CORE_ADDR baseaddr; |
8252 | ||
b3b3bada | 8253 | baseaddr = objfile->text_section_offset (); |
c906108c | 8254 | |
43816ebc TT |
8255 | gdb::unique_xmalloc_ptr<char> built_actual_name |
8256 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 8257 | if (built_actual_name != NULL) |
43816ebc | 8258 | actual_name = built_actual_name.get (); |
63d06c5c | 8259 | |
72bf9492 DJ |
8260 | if (actual_name == NULL) |
8261 | actual_name = pdi->name; | |
8262 | ||
76e288d1 TT |
8263 | partial_symbol psymbol; |
8264 | memset (&psymbol, 0, sizeof (psymbol)); | |
8265 | psymbol.ginfo.set_language (cu->language, &objfile->objfile_obstack); | |
8266 | psymbol.ginfo.section = -1; | |
8267 | ||
8268 | /* The code below indicates that the psymbol should be installed by | |
8269 | setting this. */ | |
8270 | gdb::optional<psymbol_placement> where; | |
8271 | ||
c906108c SS |
8272 | switch (pdi->tag) |
8273 | { | |
b1dc1806 | 8274 | case DW_TAG_inlined_subroutine: |
c906108c | 8275 | case DW_TAG_subprogram: |
79748972 TT |
8276 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8277 | - baseaddr); | |
0a4b0913 AB |
8278 | if (pdi->is_external |
8279 | || cu->language == language_ada | |
8280 | || (cu->language == language_fortran | |
8281 | && pdi->die_parent != NULL | |
8282 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8283 | { | |
8284 | /* Normally, only "external" DIEs are part of the global scope. | |
8285 | But in Ada and Fortran, we want to be able to access nested | |
8286 | procedures globally. So all Ada and Fortran subprograms are | |
8287 | stored in the global scope. */ | |
76e288d1 | 8288 | where = psymbol_placement::GLOBAL; |
c906108c SS |
8289 | } |
8290 | else | |
76e288d1 TT |
8291 | where = psymbol_placement::STATIC; |
8292 | ||
8293 | psymbol.domain = VAR_DOMAIN; | |
8294 | psymbol.aclass = LOC_BLOCK; | |
8295 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); | |
8296 | psymbol.ginfo.value.address = addr; | |
0c1b455e TT |
8297 | |
8298 | if (pdi->main_subprogram && actual_name != NULL) | |
8299 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8300 | break; |
72929c62 | 8301 | case DW_TAG_constant: |
76e288d1 TT |
8302 | psymbol.domain = VAR_DOMAIN; |
8303 | psymbol.aclass = LOC_STATIC; | |
8304 | where = (pdi->is_external | |
8305 | ? psymbol_placement::GLOBAL | |
8306 | : psymbol_placement::STATIC); | |
72929c62 | 8307 | break; |
c906108c | 8308 | case DW_TAG_variable: |
95554aad TT |
8309 | if (pdi->d.locdesc) |
8310 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8311 | |
95554aad | 8312 | if (pdi->d.locdesc |
caac4577 JG |
8313 | && addr == 0 |
8314 | && !dwarf2_per_objfile->has_section_at_zero) | |
8315 | { | |
8316 | /* A global or static variable may also have been stripped | |
8317 | out by the linker if unused, in which case its address | |
8318 | will be nullified; do not add such variables into partial | |
8319 | symbol table then. */ | |
8320 | } | |
8321 | else if (pdi->is_external) | |
c906108c SS |
8322 | { |
8323 | /* Global Variable. | |
8324 | Don't enter into the minimal symbol tables as there is | |
8325 | a minimal symbol table entry from the ELF symbols already. | |
8326 | Enter into partial symbol table if it has a location | |
8327 | descriptor or a type. | |
8328 | If the location descriptor is missing, new_symbol will create | |
8329 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8330 | be determined from the minimal symbol table whenever the variable | |
8331 | is referenced. | |
8332 | The address for the partial symbol table entry is not | |
8333 | used by GDB, but it comes in handy for debugging partial symbol | |
8334 | table building. */ | |
8335 | ||
95554aad | 8336 | if (pdi->d.locdesc || pdi->has_type) |
76e288d1 TT |
8337 | { |
8338 | psymbol.domain = VAR_DOMAIN; | |
8339 | psymbol.aclass = LOC_STATIC; | |
8340 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); | |
8341 | psymbol.ginfo.value.address = addr; | |
8342 | where = psymbol_placement::GLOBAL; | |
8343 | } | |
c906108c SS |
8344 | } |
8345 | else | |
8346 | { | |
ff908ebf AW |
8347 | int has_loc = pdi->d.locdesc != NULL; |
8348 | ||
8349 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8350 | without location descriptors or constant values). */ | |
8351 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 8352 | return; |
ff908ebf | 8353 | |
76e288d1 TT |
8354 | psymbol.domain = VAR_DOMAIN; |
8355 | psymbol.aclass = LOC_STATIC; | |
8356 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); | |
8357 | if (has_loc) | |
8358 | psymbol.ginfo.value.address = addr; | |
8359 | where = psymbol_placement::STATIC; | |
c906108c SS |
8360 | } |
8361 | break; | |
8362 | case DW_TAG_typedef: | |
8363 | case DW_TAG_base_type: | |
a02abb62 | 8364 | case DW_TAG_subrange_type: |
76e288d1 TT |
8365 | psymbol.domain = VAR_DOMAIN; |
8366 | psymbol.aclass = LOC_TYPEDEF; | |
8367 | where = psymbol_placement::STATIC; | |
c906108c | 8368 | break; |
74921315 | 8369 | case DW_TAG_imported_declaration: |
72bf9492 | 8370 | case DW_TAG_namespace: |
76e288d1 TT |
8371 | psymbol.domain = VAR_DOMAIN; |
8372 | psymbol.aclass = LOC_TYPEDEF; | |
8373 | where = psymbol_placement::GLOBAL; | |
72bf9492 | 8374 | break; |
530e8392 | 8375 | case DW_TAG_module: |
a5fd13a9 BH |
8376 | /* With Fortran 77 there might be a "BLOCK DATA" module |
8377 | available without any name. If so, we skip the module as it | |
8378 | doesn't bring any value. */ | |
8379 | if (actual_name != nullptr) | |
76e288d1 TT |
8380 | { |
8381 | psymbol.domain = MODULE_DOMAIN; | |
8382 | psymbol.aclass = LOC_TYPEDEF; | |
8383 | where = psymbol_placement::GLOBAL; | |
8384 | } | |
530e8392 | 8385 | break; |
c906108c | 8386 | case DW_TAG_class_type: |
680b30c7 | 8387 | case DW_TAG_interface_type: |
c906108c SS |
8388 | case DW_TAG_structure_type: |
8389 | case DW_TAG_union_type: | |
8390 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8391 | /* Skip external references. The DWARF standard says in the section |
8392 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8393 | structure, union or class type is represented by a structure, | |
8394 | union or class entry that does not have a byte size attribute | |
8395 | and that has a DW_AT_declaration attribute." */ | |
8396 | if (!pdi->has_byte_size && pdi->is_declaration) | |
43816ebc | 8397 | return; |
fa4028e9 | 8398 | |
63d06c5c DC |
8399 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8400 | static vs. global. */ | |
76e288d1 TT |
8401 | psymbol.domain = STRUCT_DOMAIN; |
8402 | psymbol.aclass = LOC_TYPEDEF; | |
8403 | where = (cu->language == language_cplus | |
8404 | ? psymbol_placement::GLOBAL | |
8405 | : psymbol_placement::STATIC); | |
c906108c SS |
8406 | break; |
8407 | case DW_TAG_enumerator: | |
76e288d1 TT |
8408 | psymbol.domain = VAR_DOMAIN; |
8409 | psymbol.aclass = LOC_CONST; | |
8410 | where = (cu->language == language_cplus | |
8411 | ? psymbol_placement::GLOBAL | |
8412 | : psymbol_placement::STATIC); | |
c906108c SS |
8413 | break; |
8414 | default: | |
8415 | break; | |
8416 | } | |
76e288d1 TT |
8417 | |
8418 | if (where.has_value ()) | |
8419 | { | |
f049a313 TT |
8420 | if (built_actual_name != nullptr) |
8421 | actual_name = objfile->intern (actual_name); | |
bcfe6157 TT |
8422 | if (pdi->linkage_name == nullptr || cu->language == language_ada) |
8423 | psymbol.ginfo.set_linkage_name (actual_name); | |
8424 | else | |
8425 | { | |
8426 | psymbol.ginfo.set_demangled_name (actual_name, | |
8427 | &objfile->objfile_obstack); | |
8428 | psymbol.ginfo.set_linkage_name (pdi->linkage_name); | |
8429 | } | |
76e288d1 TT |
8430 | add_psymbol_to_list (psymbol, *where, objfile); |
8431 | } | |
c906108c SS |
8432 | } |
8433 | ||
5c4e30ca DC |
8434 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8435 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8436 | the name of the enclosing namespace. */ | |
91c24f0a | 8437 | |
72bf9492 DJ |
8438 | static void |
8439 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8440 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8441 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8442 | { |
72bf9492 | 8443 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8444 | |
72bf9492 | 8445 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8446 | |
8447 | /* Now scan partial symbols in that namespace. */ | |
8448 | ||
91c24f0a | 8449 | if (pdi->has_children) |
cdc07690 | 8450 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8451 | } |
8452 | ||
5d7cb8df JK |
8453 | /* Read a partial die corresponding to a Fortran module. */ |
8454 | ||
8455 | static void | |
8456 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8457 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8458 | { |
530e8392 KB |
8459 | /* Add a symbol for the namespace. */ |
8460 | ||
8461 | add_partial_symbol (pdi, cu); | |
8462 | ||
f55ee35c | 8463 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8464 | |
8465 | if (pdi->has_children) | |
cdc07690 | 8466 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8467 | } |
8468 | ||
b1dc1806 XR |
8469 | /* Read a partial die corresponding to a subprogram or an inlined |
8470 | subprogram and create a partial symbol for that subprogram. | |
8471 | When the CU language allows it, this routine also defines a partial | |
8472 | symbol for each nested subprogram that this subprogram contains. | |
8473 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8474 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8475 | |
cdc07690 YQ |
8476 | PDI may also be a lexical block, in which case we simply search |
8477 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8478 | Again, this is only performed when the CU language allows this |
8479 | type of definitions. */ | |
8480 | ||
8481 | static void | |
8482 | add_partial_subprogram (struct partial_die_info *pdi, | |
8483 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8484 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8485 | { |
b1dc1806 | 8486 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8487 | { |
8488 | if (pdi->has_pc_info) | |
8489 | { | |
8490 | if (pdi->lowpc < *lowpc) | |
8491 | *lowpc = pdi->lowpc; | |
8492 | if (pdi->highpc > *highpc) | |
8493 | *highpc = pdi->highpc; | |
cdc07690 | 8494 | if (set_addrmap) |
5734ee8b | 8495 | { |
518817b3 | 8496 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 8497 | struct gdbarch *gdbarch = objfile->arch (); |
3e29f34a | 8498 | CORE_ADDR baseaddr; |
b926417a TT |
8499 | CORE_ADDR this_highpc; |
8500 | CORE_ADDR this_lowpc; | |
5734ee8b | 8501 | |
b3b3bada | 8502 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8503 | this_lowpc |
8504 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8505 | pdi->lowpc + baseaddr) | |
8506 | - baseaddr); | |
8507 | this_highpc | |
8508 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8509 | pdi->highpc + baseaddr) | |
8510 | - baseaddr); | |
d320c2b5 | 8511 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 8512 | this_lowpc, this_highpc - 1, |
9291a0cd | 8513 | cu->per_cu->v.psymtab); |
5734ee8b | 8514 | } |
481860b3 GB |
8515 | } |
8516 | ||
8517 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8518 | { | |
bc30ff58 | 8519 | if (!pdi->is_declaration) |
e8d05480 JB |
8520 | /* Ignore subprogram DIEs that do not have a name, they are |
8521 | illegal. Do not emit a complaint at this point, we will | |
8522 | do so when we convert this psymtab into a symtab. */ | |
8523 | if (pdi->name) | |
8524 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8525 | } |
8526 | } | |
6e70227d | 8527 | |
bc30ff58 JB |
8528 | if (! pdi->has_children) |
8529 | return; | |
8530 | ||
0a4b0913 | 8531 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8532 | { |
8533 | pdi = pdi->die_child; | |
8534 | while (pdi != NULL) | |
8535 | { | |
52356b79 | 8536 | pdi->fixup (cu); |
bc30ff58 | 8537 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8538 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8539 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8540 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8541 | pdi = pdi->die_sibling; |
8542 | } | |
8543 | } | |
8544 | } | |
8545 | ||
91c24f0a DC |
8546 | /* Read a partial die corresponding to an enumeration type. */ |
8547 | ||
72bf9492 DJ |
8548 | static void |
8549 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8550 | struct dwarf2_cu *cu) | |
91c24f0a | 8551 | { |
72bf9492 | 8552 | struct partial_die_info *pdi; |
91c24f0a DC |
8553 | |
8554 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8555 | add_partial_symbol (enum_pdi, cu); |
8556 | ||
8557 | pdi = enum_pdi->die_child; | |
8558 | while (pdi) | |
91c24f0a | 8559 | { |
72bf9492 | 8560 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 8561 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8562 | else |
72bf9492 DJ |
8563 | add_partial_symbol (pdi, cu); |
8564 | pdi = pdi->die_sibling; | |
91c24f0a | 8565 | } |
91c24f0a DC |
8566 | } |
8567 | ||
6caca83c CC |
8568 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8569 | ||
8570 | static unsigned int | |
d521ce57 | 8571 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8572 | { |
8573 | unsigned int bytes_read; | |
8574 | ||
8575 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8576 | } | |
8577 | ||
685af9cd TT |
8578 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8579 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8580 | ||
4bb7a0a7 DJ |
8581 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8582 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8583 | the initial number. */ | |
8584 | ||
8585 | static struct abbrev_info * | |
685af9cd TT |
8586 | peek_die_abbrev (const die_reader_specs &reader, |
8587 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8588 | { |
685af9cd | 8589 | dwarf2_cu *cu = reader.cu; |
518817b3 | 8590 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
8591 | unsigned int abbrev_number |
8592 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8593 | |
8594 | if (abbrev_number == 0) | |
8595 | return NULL; | |
8596 | ||
685af9cd | 8597 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
8598 | if (!abbrev) |
8599 | { | |
422b9917 | 8600 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8601 | " at offset %s [in module %s]"), |
422b9917 | 8602 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8603 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8604 | } |
8605 | ||
8606 | return abbrev; | |
8607 | } | |
8608 | ||
93311388 DE |
8609 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8610 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8611 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8612 | ||
d521ce57 TT |
8613 | static const gdb_byte * |
8614 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8615 | { |
4bb7a0a7 DJ |
8616 | while (1) |
8617 | { | |
685af9cd TT |
8618 | unsigned int bytes_read; |
8619 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
8620 | ||
4bb7a0a7 DJ |
8621 | if (abbrev == NULL) |
8622 | return info_ptr + bytes_read; | |
8623 | else | |
dee91e82 | 8624 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8625 | } |
8626 | } | |
8627 | ||
93311388 DE |
8628 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8629 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8630 | abbrev corresponding to that skipped uleb128 should be passed in |
8631 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8632 | children. */ | |
8633 | ||
d521ce57 TT |
8634 | static const gdb_byte * |
8635 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8636 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8637 | { |
8638 | unsigned int bytes_read; | |
8639 | struct attribute attr; | |
dee91e82 DE |
8640 | bfd *abfd = reader->abfd; |
8641 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8642 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8643 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8644 | unsigned int form, i; |
8645 | ||
8646 | for (i = 0; i < abbrev->num_attrs; i++) | |
8647 | { | |
8648 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8649 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8650 | { | |
18a8505e AT |
8651 | bool ignored; |
8652 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr, | |
8653 | &ignored); | |
4bb7a0a7 | 8654 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8655 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8656 | else |
b9502d3f | 8657 | { |
0826b30a | 8658 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 8659 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
8660 | |
8661 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8662 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 8663 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 8664 | reader->die_section->overflow_complaint (); |
b9502d3f WN |
8665 | else |
8666 | return sibling_ptr; | |
8667 | } | |
4bb7a0a7 DJ |
8668 | } |
8669 | ||
8670 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8671 | form = abbrev->attrs[i].form; | |
8672 | skip_attribute: | |
8673 | switch (form) | |
8674 | { | |
4bb7a0a7 | 8675 | case DW_FORM_ref_addr: |
ae411497 TT |
8676 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8677 | and later it is offset sized. */ | |
8678 | if (cu->header.version == 2) | |
8679 | info_ptr += cu->header.addr_size; | |
8680 | else | |
8681 | info_ptr += cu->header.offset_size; | |
8682 | break; | |
36586728 TT |
8683 | case DW_FORM_GNU_ref_alt: |
8684 | info_ptr += cu->header.offset_size; | |
8685 | break; | |
ae411497 | 8686 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8687 | info_ptr += cu->header.addr_size; |
8688 | break; | |
8689 | case DW_FORM_data1: | |
8690 | case DW_FORM_ref1: | |
8691 | case DW_FORM_flag: | |
8fe0f950 | 8692 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8693 | info_ptr += 1; |
8694 | break; | |
2dc7f7b3 | 8695 | case DW_FORM_flag_present: |
43988095 | 8696 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8697 | break; |
4bb7a0a7 DJ |
8698 | case DW_FORM_data2: |
8699 | case DW_FORM_ref2: | |
8fe0f950 | 8700 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8701 | info_ptr += 2; |
8702 | break; | |
8fe0f950 AT |
8703 | case DW_FORM_strx3: |
8704 | info_ptr += 3; | |
8705 | break; | |
4bb7a0a7 DJ |
8706 | case DW_FORM_data4: |
8707 | case DW_FORM_ref4: | |
8fe0f950 | 8708 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8709 | info_ptr += 4; |
8710 | break; | |
8711 | case DW_FORM_data8: | |
8712 | case DW_FORM_ref8: | |
55f1336d | 8713 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8714 | info_ptr += 8; |
8715 | break; | |
0224619f JK |
8716 | case DW_FORM_data16: |
8717 | info_ptr += 16; | |
8718 | break; | |
4bb7a0a7 | 8719 | case DW_FORM_string: |
9b1c24c8 | 8720 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8721 | info_ptr += bytes_read; |
8722 | break; | |
2dc7f7b3 | 8723 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8724 | case DW_FORM_strp: |
36586728 | 8725 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8726 | info_ptr += cu->header.offset_size; |
8727 | break; | |
2dc7f7b3 | 8728 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8729 | case DW_FORM_block: |
8730 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8731 | info_ptr += bytes_read; | |
8732 | break; | |
8733 | case DW_FORM_block1: | |
8734 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8735 | break; | |
8736 | case DW_FORM_block2: | |
8737 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8738 | break; | |
8739 | case DW_FORM_block4: | |
8740 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8741 | break; | |
336d760d | 8742 | case DW_FORM_addrx: |
cf532bd1 | 8743 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8744 | case DW_FORM_sdata: |
8745 | case DW_FORM_udata: | |
8746 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8747 | case DW_FORM_GNU_addr_index: |
8748 | case DW_FORM_GNU_str_index: | |
18a8505e | 8749 | case DW_FORM_rnglistx: |
41144253 | 8750 | case DW_FORM_loclistx: |
d521ce57 | 8751 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8752 | break; |
8753 | case DW_FORM_indirect: | |
8754 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8755 | info_ptr += bytes_read; | |
8756 | /* We need to continue parsing from here, so just go back to | |
8757 | the top. */ | |
8758 | goto skip_attribute; | |
8759 | ||
8760 | default: | |
3e43a32a MS |
8761 | error (_("Dwarf Error: Cannot handle %s " |
8762 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8763 | dwarf_form_name (form), |
8764 | bfd_get_filename (abfd)); | |
8765 | } | |
8766 | } | |
8767 | ||
8768 | if (abbrev->has_children) | |
dee91e82 | 8769 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8770 | else |
8771 | return info_ptr; | |
8772 | } | |
8773 | ||
93311388 | 8774 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8775 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8776 | |
d521ce57 | 8777 | static const gdb_byte * |
dee91e82 DE |
8778 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8779 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8780 | const gdb_byte *info_ptr) |
91c24f0a DC |
8781 | { |
8782 | /* Do we know the sibling already? */ | |
72bf9492 | 8783 | |
91c24f0a DC |
8784 | if (orig_pdi->sibling) |
8785 | return orig_pdi->sibling; | |
8786 | ||
8787 | /* Are there any children to deal with? */ | |
8788 | ||
8789 | if (!orig_pdi->has_children) | |
8790 | return info_ptr; | |
8791 | ||
4bb7a0a7 | 8792 | /* Skip the children the long way. */ |
91c24f0a | 8793 | |
dee91e82 | 8794 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8795 | } |
8796 | ||
257e7a09 | 8797 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8798 | not NULL. */ |
c906108c | 8799 | |
891813be TT |
8800 | void |
8801 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8802 | { |
ed2dc618 SM |
8803 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8804 | = get_dwarf2_per_objfile (objfile); | |
8805 | ||
077cbab2 TT |
8806 | gdb_assert (!readin); |
8807 | /* If this psymtab is constructed from a debug-only objfile, the | |
8808 | has_section_at_zero flag will not necessarily be correct. We | |
8809 | can get the correct value for this flag by looking at the data | |
8810 | associated with the (presumably stripped) associated objfile. */ | |
8811 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8812 | { |
077cbab2 TT |
8813 | struct dwarf2_per_objfile *dpo_backlink |
8814 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); | |
c906108c | 8815 | |
077cbab2 TT |
8816 | dwarf2_per_objfile->has_section_at_zero |
8817 | = dpo_backlink->has_section_at_zero; | |
8818 | } | |
98bfdba5 | 8819 | |
8566b89b | 8820 | expand_psymtab (objfile); |
95554aad | 8821 | |
ed2dc618 | 8822 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 8823 | } |
9cdd5dbd DE |
8824 | \f |
8825 | /* Reading in full CUs. */ | |
c906108c | 8826 | |
10b3939b DJ |
8827 | /* Add PER_CU to the queue. */ |
8828 | ||
8829 | static void | |
95554aad TT |
8830 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8831 | enum language pretend_language) | |
10b3939b | 8832 | { |
10b3939b | 8833 | per_cu->queued = 1; |
39856def | 8834 | per_cu->dwarf2_per_objfile->queue.emplace (per_cu, pretend_language); |
10b3939b DJ |
8835 | } |
8836 | ||
89e63ee4 DE |
8837 | /* If PER_CU is not yet queued, add it to the queue. |
8838 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8839 | dependency. | |
0907af0c | 8840 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8841 | meaning either PER_CU is already queued or it is already loaded. |
8842 | ||
8843 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8844 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8845 | |
8846 | static int | |
89e63ee4 | 8847 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8848 | struct dwarf2_per_cu_data *per_cu, |
8849 | enum language pretend_language) | |
8850 | { | |
8851 | /* We may arrive here during partial symbol reading, if we need full | |
8852 | DIEs to process an unusual case (e.g. template arguments). Do | |
8853 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 8854 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
8855 | { |
8856 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8857 | return 1; | |
8858 | return 0; | |
8859 | } | |
8860 | ||
8861 | /* Mark the dependence relation so that we don't flush PER_CU | |
8862 | too early. */ | |
89e63ee4 DE |
8863 | if (dependent_cu != NULL) |
8864 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8865 | |
8866 | /* If it's already on the queue, we have nothing to do. */ | |
8867 | if (per_cu->queued) | |
8868 | return 0; | |
8869 | ||
8870 | /* If the compilation unit is already loaded, just mark it as | |
8871 | used. */ | |
8872 | if (per_cu->cu != NULL) | |
8873 | { | |
8874 | per_cu->cu->last_used = 0; | |
8875 | return 0; | |
8876 | } | |
8877 | ||
8878 | /* Add it to the queue. */ | |
8879 | queue_comp_unit (per_cu, pretend_language); | |
8880 | ||
8881 | return 1; | |
8882 | } | |
8883 | ||
10b3939b DJ |
8884 | /* Process the queue. */ |
8885 | ||
8886 | static void | |
ed2dc618 | 8887 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b | 8888 | { |
b4f54984 | 8889 | if (dwarf_read_debug) |
45cfd468 DE |
8890 | { |
8891 | fprintf_unfiltered (gdb_stdlog, | |
8892 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8893 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8894 | } |
8895 | ||
03dd20cc DJ |
8896 | /* The queue starts out with one item, but following a DIE reference |
8897 | may load a new CU, adding it to the end of the queue. */ | |
39856def | 8898 | while (!dwarf2_per_objfile->queue.empty ()) |
10b3939b | 8899 | { |
39856def TT |
8900 | dwarf2_queue_item &item = dwarf2_per_objfile->queue.front (); |
8901 | ||
cc12ce38 | 8902 | if ((dwarf2_per_objfile->using_index |
39856def TT |
8903 | ? !item.per_cu->v.quick->compunit_symtab |
8904 | : (item.per_cu->v.psymtab && !item.per_cu->v.psymtab->readin)) | |
cc12ce38 | 8905 | /* Skip dummy CUs. */ |
39856def | 8906 | && item.per_cu->cu != NULL) |
f4dc4d17 | 8907 | { |
39856def | 8908 | struct dwarf2_per_cu_data *per_cu = item.per_cu; |
73be47f5 | 8909 | unsigned int debug_print_threshold; |
247f5c4f | 8910 | char buf[100]; |
f4dc4d17 | 8911 | |
247f5c4f | 8912 | if (per_cu->is_debug_types) |
f4dc4d17 | 8913 | { |
247f5c4f DE |
8914 | struct signatured_type *sig_type = |
8915 | (struct signatured_type *) per_cu; | |
8916 | ||
9d8780f0 | 8917 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 8918 | hex_string (sig_type->signature), |
9d8780f0 | 8919 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
8920 | /* There can be 100s of TUs. |
8921 | Only print them in verbose mode. */ | |
8922 | debug_print_threshold = 2; | |
f4dc4d17 | 8923 | } |
247f5c4f | 8924 | else |
73be47f5 | 8925 | { |
9d8780f0 SM |
8926 | sprintf (buf, "CU at offset %s", |
8927 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
8928 | debug_print_threshold = 1; |
8929 | } | |
247f5c4f | 8930 | |
b4f54984 | 8931 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8932 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8933 | |
8934 | if (per_cu->is_debug_types) | |
39856def | 8935 | process_full_type_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8936 | else |
39856def | 8937 | process_full_comp_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8938 | |
b4f54984 | 8939 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8940 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8941 | } |
10b3939b | 8942 | |
39856def TT |
8943 | item.per_cu->queued = 0; |
8944 | dwarf2_per_objfile->queue.pop (); | |
10b3939b DJ |
8945 | } |
8946 | ||
b4f54984 | 8947 | if (dwarf_read_debug) |
45cfd468 DE |
8948 | { |
8949 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8950 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8951 | } |
10b3939b DJ |
8952 | } |
8953 | ||
10b3939b DJ |
8954 | /* Read in full symbols for PST, and anything it depends on. */ |
8955 | ||
8566b89b TT |
8956 | void |
8957 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8958 | { |
194d088f | 8959 | gdb_assert (!readin); |
95554aad | 8960 | |
48993951 | 8961 | expand_dependencies (objfile); |
aaa75496 | 8962 | |
b83470bf TT |
8963 | dw2_do_instantiate_symtab (per_cu_data, false); |
8964 | gdb_assert (get_compunit_symtab () != nullptr); | |
10b3939b DJ |
8965 | } |
8966 | ||
dee91e82 DE |
8967 | /* Trivial hash function for die_info: the hash value of a DIE |
8968 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8969 | |
dee91e82 DE |
8970 | static hashval_t |
8971 | die_hash (const void *item) | |
10b3939b | 8972 | { |
9a3c8263 | 8973 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8974 | |
9c541725 | 8975 | return to_underlying (die->sect_off); |
dee91e82 | 8976 | } |
63d06c5c | 8977 | |
dee91e82 DE |
8978 | /* Trivial comparison function for die_info structures: two DIEs |
8979 | are equal if they have the same offset. */ | |
98bfdba5 | 8980 | |
dee91e82 DE |
8981 | static int |
8982 | die_eq (const void *item_lhs, const void *item_rhs) | |
8983 | { | |
9a3c8263 SM |
8984 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8985 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8986 | |
9c541725 | 8987 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8988 | } |
c906108c | 8989 | |
c0ab21c2 | 8990 | /* Load the DIEs associated with PER_CU into memory. */ |
c906108c | 8991 | |
dee91e82 | 8992 | static void |
c0ab21c2 TT |
8993 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8994 | bool skip_partial, | |
8995 | enum language pretend_language) | |
dee91e82 | 8996 | { |
c0ab21c2 TT |
8997 | gdb_assert (! this_cu->is_debug_types); |
8998 | ||
6751ebae | 8999 | cutu_reader reader (this_cu, NULL, 1, skip_partial); |
c0ab21c2 TT |
9000 | if (reader.dummy_p) |
9001 | return; | |
9002 | ||
9003 | struct dwarf2_cu *cu = reader.cu; | |
9004 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 9005 | |
dee91e82 DE |
9006 | gdb_assert (cu->die_hash == NULL); |
9007 | cu->die_hash = | |
9008 | htab_create_alloc_ex (cu->header.length / 12, | |
9009 | die_hash, | |
9010 | die_eq, | |
9011 | NULL, | |
9012 | &cu->comp_unit_obstack, | |
9013 | hashtab_obstack_allocate, | |
9014 | dummy_obstack_deallocate); | |
e142c38c | 9015 | |
3e225074 | 9016 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
9017 | reader.comp_unit_die->child |
9018 | = read_die_and_siblings (&reader, reader.info_ptr, | |
9019 | &info_ptr, reader.comp_unit_die); | |
9020 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 9021 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
9022 | |
9023 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 9024 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 9025 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
9026 | or we won't be able to build types correctly. |
9027 | Similarly, if we do not read the producer, we can not apply | |
9028 | producer-specific interpretation. */ | |
c0ab21c2 | 9029 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
9030 | |
9031 | reader.keep (); | |
10b3939b DJ |
9032 | } |
9033 | ||
3da10d80 KS |
9034 | /* Add a DIE to the delayed physname list. */ |
9035 | ||
9036 | static void | |
9037 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
9038 | const char *name, struct die_info *die, | |
9039 | struct dwarf2_cu *cu) | |
9040 | { | |
9041 | struct delayed_method_info mi; | |
9042 | mi.type = type; | |
9043 | mi.fnfield_index = fnfield_index; | |
9044 | mi.index = index; | |
9045 | mi.name = name; | |
9046 | mi.die = die; | |
c89b44cd | 9047 | cu->method_list.push_back (mi); |
3da10d80 KS |
9048 | } |
9049 | ||
3693fdb3 PA |
9050 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
9051 | "const" / "volatile". If so, decrements LEN by the length of the | |
9052 | modifier and return true. Otherwise return false. */ | |
9053 | ||
9054 | template<size_t N> | |
9055 | static bool | |
9056 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
9057 | { | |
9058 | size_t mod_len = sizeof (mod) - 1; | |
9059 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
9060 | { | |
9061 | len -= mod_len; | |
9062 | return true; | |
9063 | } | |
9064 | return false; | |
9065 | } | |
9066 | ||
3da10d80 KS |
9067 | /* Compute the physnames of any methods on the CU's method list. |
9068 | ||
9069 | The computation of method physnames is delayed in order to avoid the | |
9070 | (bad) condition that one of the method's formal parameters is of an as yet | |
9071 | incomplete type. */ | |
9072 | ||
9073 | static void | |
9074 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9075 | { | |
3693fdb3 | 9076 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9077 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9078 | return; |
9079 | gdb_assert (cu->language == language_cplus); | |
9080 | ||
52941706 | 9081 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9082 | { |
1d06ead6 | 9083 | const char *physname; |
3da10d80 | 9084 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9085 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9086 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9087 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9088 | = physname ? physname : ""; |
3693fdb3 PA |
9089 | |
9090 | /* Since there's no tag to indicate whether a method is a | |
9091 | const/volatile overload, extract that information out of the | |
9092 | demangled name. */ | |
9093 | if (physname != NULL) | |
9094 | { | |
9095 | size_t len = strlen (physname); | |
9096 | ||
9097 | while (1) | |
9098 | { | |
9099 | if (physname[len] == ')') /* shortcut */ | |
9100 | break; | |
9101 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9102 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9103 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9104 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9105 | else |
9106 | break; | |
9107 | } | |
9108 | } | |
3da10d80 | 9109 | } |
c89b44cd TT |
9110 | |
9111 | /* The list is no longer needed. */ | |
9112 | cu->method_list.clear (); | |
3da10d80 KS |
9113 | } |
9114 | ||
a766d390 DE |
9115 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9116 | and it's not clear if/how imported objects will appear. | |
9117 | To keep Go support simple until that's worked out, | |
9118 | go back through what we've read and create something usable. | |
9119 | We could do this while processing each DIE, and feels kinda cleaner, | |
9120 | but that way is more invasive. | |
9121 | This is to, for example, allow the user to type "p var" or "b main" | |
9122 | without having to specify the package name, and allow lookups | |
9123 | of module.object to work in contexts that use the expression | |
9124 | parser. */ | |
9125 | ||
9126 | static void | |
9127 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9128 | { | |
421d1616 | 9129 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
9130 | struct pending *list; |
9131 | int i; | |
9132 | ||
c24bdb02 | 9133 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9134 | list != NULL; |
9135 | list = list->next) | |
a766d390 DE |
9136 | { |
9137 | for (i = 0; i < list->nsyms; ++i) | |
9138 | { | |
9139 | struct symbol *sym = list->symbol[i]; | |
9140 | ||
c1b5c1eb | 9141 | if (sym->language () == language_go |
a766d390 DE |
9142 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
9143 | { | |
421d1616 TT |
9144 | gdb::unique_xmalloc_ptr<char> this_package_name |
9145 | (go_symbol_package_name (sym)); | |
a766d390 DE |
9146 | |
9147 | if (this_package_name == NULL) | |
9148 | continue; | |
9149 | if (package_name == NULL) | |
421d1616 | 9150 | package_name = std::move (this_package_name); |
a766d390 DE |
9151 | else |
9152 | { | |
518817b3 SM |
9153 | struct objfile *objfile |
9154 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
421d1616 | 9155 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 9156 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9157 | (symbol_symtab (sym) != NULL |
9158 | ? symtab_to_filename_for_display | |
9159 | (symbol_symtab (sym)) | |
e3b94546 | 9160 | : objfile_name (objfile)), |
421d1616 | 9161 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
9162 | } |
9163 | } | |
9164 | } | |
9165 | } | |
9166 | ||
9167 | if (package_name != NULL) | |
9168 | { | |
518817b3 | 9169 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 9170 | const char *saved_package_name = objfile->intern (package_name.get ()); |
19f392bc UW |
9171 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9172 | saved_package_name); | |
a766d390 DE |
9173 | struct symbol *sym; |
9174 | ||
e623cf5d | 9175 | sym = allocate_symbol (objfile); |
d3ecddab | 9176 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 9177 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
9178 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9179 | e.g., "main" finds the "main" module and not C's main(). */ | |
9180 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9181 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9182 | SYMBOL_TYPE (sym) = type; |
9183 | ||
c24bdb02 | 9184 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9185 | } |
9186 | } | |
9187 | ||
c9317f21 TT |
9188 | /* Allocate a fully-qualified name consisting of the two parts on the |
9189 | obstack. */ | |
9190 | ||
9191 | static const char * | |
9192 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9193 | { | |
9194 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9195 | } | |
9196 | ||
9c6a1327 TT |
9197 | /* A helper that allocates a variant part to attach to a Rust enum |
9198 | type. OBSTACK is where the results should be allocated. TYPE is | |
9199 | the type we're processing. DISCRIMINANT_INDEX is the index of the | |
9200 | discriminant. It must be the index of one of the fields of TYPE. | |
9201 | DEFAULT_INDEX is the index of the default field; or -1 if there is | |
9202 | no default. RANGES is indexed by "effective" field number (the | |
9203 | field index, but omitting the discriminant and default fields) and | |
9204 | must hold the discriminant values used by the variants. Note that | |
9205 | RANGES must have a lifetime at least as long as OBSTACK -- either | |
9206 | already allocated on it, or static. */ | |
c9317f21 | 9207 | |
9c6a1327 TT |
9208 | static void |
9209 | alloc_rust_variant (struct obstack *obstack, struct type *type, | |
9210 | int discriminant_index, int default_index, | |
9211 | gdb::array_view<discriminant_range> ranges) | |
9212 | { | |
9213 | /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those | |
9214 | must be handled by the caller. */ | |
9215 | gdb_assert (discriminant_index >= 0 | |
9216 | && discriminant_index < TYPE_NFIELDS (type)); | |
c9317f21 | 9217 | gdb_assert (default_index == -1 |
c7b15a66 | 9218 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 | 9219 | |
9c6a1327 TT |
9220 | /* We have one variant for each non-discriminant field. */ |
9221 | int n_variants = TYPE_NFIELDS (type) - 1; | |
c9317f21 | 9222 | |
9c6a1327 TT |
9223 | variant *variants = new (obstack) variant[n_variants]; |
9224 | int var_idx = 0; | |
9225 | int range_idx = 0; | |
9226 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9227 | { | |
9228 | if (i == discriminant_index) | |
9229 | continue; | |
c9317f21 | 9230 | |
9c6a1327 TT |
9231 | variants[var_idx].first_field = i; |
9232 | variants[var_idx].last_field = i + 1; | |
9233 | ||
9234 | /* The default field does not need a range, but other fields do. | |
9235 | We skipped the discriminant above. */ | |
9236 | if (i != default_index) | |
9237 | { | |
9238 | variants[var_idx].discriminants = ranges.slice (range_idx, 1); | |
9239 | ++range_idx; | |
9240 | } | |
c9317f21 | 9241 | |
9c6a1327 TT |
9242 | ++var_idx; |
9243 | } | |
9244 | ||
9245 | gdb_assert (range_idx == ranges.size ()); | |
9246 | gdb_assert (var_idx == n_variants); | |
9247 | ||
9248 | variant_part *part = new (obstack) variant_part; | |
9249 | part->discriminant_index = discriminant_index; | |
9250 | part->is_unsigned = TYPE_UNSIGNED (TYPE_FIELD_TYPE (type, | |
9251 | discriminant_index)); | |
9252 | part->variants = gdb::array_view<variant> (variants, n_variants); | |
9253 | ||
9254 | void *storage = obstack_alloc (obstack, sizeof (gdb::array_view<variant_part>)); | |
9255 | gdb::array_view<variant_part> *prop_value | |
9256 | = new (storage) gdb::array_view<variant_part> (part, 1); | |
c9317f21 | 9257 | |
9c6a1327 TT |
9258 | struct dynamic_prop prop; |
9259 | prop.kind = PROP_VARIANT_PARTS; | |
9260 | prop.data.variant_parts = prop_value; | |
9261 | ||
5c54719c | 9262 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
c9317f21 TT |
9263 | } |
9264 | ||
9265 | /* Some versions of rustc emitted enums in an unusual way. | |
9266 | ||
9267 | Ordinary enums were emitted as unions. The first element of each | |
9268 | structure in the union was named "RUST$ENUM$DISR". This element | |
9269 | held the discriminant. | |
9270 | ||
9271 | These versions of Rust also implemented the "non-zero" | |
9272 | optimization. When the enum had two values, and one is empty and | |
9273 | the other holds a pointer that cannot be zero, the pointer is used | |
9274 | as the discriminant, with a zero value meaning the empty variant. | |
9275 | Here, the union's first member is of the form | |
9276 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9277 | where the fieldnos are the indices of the fields that should be | |
9278 | traversed in order to find the field (which may be several fields deep) | |
9279 | and the variantname is the name of the variant of the case when the | |
9280 | field is zero. | |
9281 | ||
9282 | This function recognizes whether TYPE is of one of these forms, | |
9283 | and, if so, smashes it to be a variant type. */ | |
9284 | ||
9285 | static void | |
9286 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9287 | { | |
78134374 | 9288 | gdb_assert (type->code () == TYPE_CODE_UNION); |
c9317f21 TT |
9289 | |
9290 | /* We don't need to deal with empty enums. */ | |
9291 | if (TYPE_NFIELDS (type) == 0) | |
9292 | return; | |
9293 | ||
9294 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9295 | if (TYPE_NFIELDS (type) == 1 | |
9296 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9297 | { | |
9298 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9299 | ||
9300 | /* Decode the field name to find the offset of the | |
9301 | discriminant. */ | |
9302 | ULONGEST bit_offset = 0; | |
9303 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9304 | while (name[0] >= '0' && name[0] <= '9') | |
9305 | { | |
9306 | char *tail; | |
9307 | unsigned long index = strtoul (name, &tail, 10); | |
9308 | name = tail; | |
9309 | if (*name != '$' | |
9310 | || index >= TYPE_NFIELDS (field_type) | |
9311 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9312 | != FIELD_LOC_KIND_BITPOS)) | |
9313 | { | |
b98664d3 | 9314 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9315 | "[in module %s]"), |
9316 | TYPE_FIELD_NAME (type, 0), | |
9317 | objfile_name (objfile)); | |
9318 | return; | |
9319 | } | |
9320 | ++name; | |
9321 | ||
9322 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9323 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9324 | } | |
9325 | ||
9c6a1327 TT |
9326 | /* Smash this type to be a structure type. We have to do this |
9327 | because the type has already been recorded. */ | |
67607e24 | 9328 | type->set_code (TYPE_CODE_STRUCT); |
9c6a1327 TT |
9329 | TYPE_NFIELDS (type) = 3; |
9330 | /* Save the field we care about. */ | |
9331 | struct field saved_field = TYPE_FIELD (type, 0); | |
9332 | TYPE_FIELDS (type) | |
c9317f21 | 9333 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); |
c9317f21 | 9334 | |
9c6a1327 TT |
9335 | /* Put the discriminant at index 0. */ |
9336 | TYPE_FIELD_TYPE (type, 0) = field_type; | |
9337 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; | |
9338 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
9339 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), bit_offset); | |
c9317f21 TT |
9340 | |
9341 | /* The order of fields doesn't really matter, so put the real | |
9342 | field at index 1 and the data-less field at index 2. */ | |
9c6a1327 TT |
9343 | TYPE_FIELD (type, 1) = saved_field; |
9344 | TYPE_FIELD_NAME (type, 1) | |
9345 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type, 1))); | |
9346 | TYPE_NAME (TYPE_FIELD_TYPE (type, 1)) | |
c9317f21 | 9347 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), |
9c6a1327 | 9348 | TYPE_FIELD_NAME (type, 1)); |
c9317f21 TT |
9349 | |
9350 | const char *dataless_name | |
9351 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9352 | name); | |
9353 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9354 | dataless_name); | |
9c6a1327 | 9355 | TYPE_FIELD_TYPE (type, 2) = dataless_type; |
c9317f21 TT |
9356 | /* NAME points into the original discriminant name, which |
9357 | already has the correct lifetime. */ | |
9c6a1327 TT |
9358 | TYPE_FIELD_NAME (type, 2) = name; |
9359 | SET_FIELD_BITPOS (TYPE_FIELD (type, 2), 0); | |
c9317f21 | 9360 | |
9c6a1327 TT |
9361 | /* Indicate that this is a variant type. */ |
9362 | static discriminant_range ranges[1] = { { 0, 0 } }; | |
9363 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, ranges); | |
c9317f21 | 9364 | } |
77c2dba3 TT |
9365 | /* A union with a single anonymous field is probably an old-style |
9366 | univariant enum. */ | |
9367 | else if (TYPE_NFIELDS (type) == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) | |
c9317f21 | 9368 | { |
c9317f21 TT |
9369 | /* Smash this type to be a structure type. We have to do this |
9370 | because the type has already been recorded. */ | |
67607e24 | 9371 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 9372 | |
9c6a1327 | 9373 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); |
c9317f21 TT |
9374 | const char *variant_name |
9375 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
9c6a1327 | 9376 | TYPE_FIELD_NAME (type, 0) = variant_name; |
c9317f21 TT |
9377 | TYPE_NAME (field_type) |
9378 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 9379 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
9380 | } |
9381 | else | |
9382 | { | |
9383 | struct type *disr_type = nullptr; | |
9384 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9385 | { | |
9386 | disr_type = TYPE_FIELD_TYPE (type, i); | |
9387 | ||
78134374 | 9388 | if (disr_type->code () != TYPE_CODE_STRUCT) |
a037790e TT |
9389 | { |
9390 | /* All fields of a true enum will be structs. */ | |
9391 | return; | |
9392 | } | |
9393 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
9394 | { |
9395 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9396 | disr_type = nullptr; |
c9317f21 TT |
9397 | } |
9398 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9399 | "RUST$ENUM$DISR") != 0) | |
9400 | { | |
9401 | /* Not a Rust enum. */ | |
9402 | return; | |
9403 | } | |
9404 | else | |
9405 | { | |
9406 | /* Found one. */ | |
9407 | break; | |
9408 | } | |
9409 | } | |
9410 | ||
9411 | /* If we got here without a discriminant, then it's probably | |
9412 | just a union. */ | |
9413 | if (disr_type == nullptr) | |
9414 | return; | |
9415 | ||
9416 | /* Smash this type to be a structure type. We have to do this | |
9417 | because the type has already been recorded. */ | |
67607e24 | 9418 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 9419 | |
9c6a1327 | 9420 | /* Make space for the discriminant field. */ |
c9317f21 | 9421 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); |
9c6a1327 TT |
9422 | field *new_fields |
9423 | = (struct field *) TYPE_ZALLOC (type, (TYPE_NFIELDS (type) | |
9424 | * sizeof (struct field))); | |
9425 | memcpy (new_fields + 1, TYPE_FIELDS (type), | |
c9317f21 | 9426 | TYPE_NFIELDS (type) * sizeof (struct field)); |
9c6a1327 TT |
9427 | TYPE_FIELDS (type) = new_fields; |
9428 | TYPE_NFIELDS (type) = TYPE_NFIELDS (type) + 1; | |
c9317f21 TT |
9429 | |
9430 | /* Install the discriminant at index 0 in the union. */ | |
9c6a1327 TT |
9431 | TYPE_FIELD (type, 0) = *disr_field; |
9432 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; | |
9433 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
c9317f21 TT |
9434 | |
9435 | /* We need a way to find the correct discriminant given a | |
9436 | variant name. For convenience we build a map here. */ | |
9437 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
9438 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
9439 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
9440 | { | |
9441 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9442 | { | |
9443 | const char *name | |
9444 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9445 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9446 | } | |
9447 | } | |
9448 | ||
9c6a1327 TT |
9449 | int n_fields = TYPE_NFIELDS (type); |
9450 | /* We don't need a range entry for the discriminant, but we do | |
9451 | need one for every other field, as there is no default | |
9452 | variant. */ | |
9453 | discriminant_range *ranges = XOBNEWVEC (&objfile->objfile_obstack, | |
9454 | discriminant_range, | |
9455 | n_fields - 1); | |
c9317f21 TT |
9456 | /* Skip the discriminant here. */ |
9457 | for (int i = 1; i < n_fields; ++i) | |
9458 | { | |
9459 | /* Find the final word in the name of this variant's type. | |
9460 | That name can be used to look up the correct | |
9461 | discriminant. */ | |
9462 | const char *variant_name | |
9c6a1327 | 9463 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (type, i))); |
c9317f21 TT |
9464 | |
9465 | auto iter = discriminant_map.find (variant_name); | |
9466 | if (iter != discriminant_map.end ()) | |
9c6a1327 TT |
9467 | { |
9468 | ranges[i].low = iter->second; | |
9469 | ranges[i].high = iter->second; | |
9470 | } | |
c9317f21 | 9471 | |
bedda9ac | 9472 | /* Remove the discriminant field, if it exists. */ |
9c6a1327 | 9473 | struct type *sub_type = TYPE_FIELD_TYPE (type, i); |
bedda9ac TT |
9474 | if (TYPE_NFIELDS (sub_type) > 0) |
9475 | { | |
9476 | --TYPE_NFIELDS (sub_type); | |
9477 | ++TYPE_FIELDS (sub_type); | |
9478 | } | |
9c6a1327 | 9479 | TYPE_FIELD_NAME (type, i) = variant_name; |
c9317f21 TT |
9480 | TYPE_NAME (sub_type) |
9481 | = rust_fully_qualify (&objfile->objfile_obstack, | |
9482 | TYPE_NAME (type), variant_name); | |
9483 | } | |
9c6a1327 TT |
9484 | |
9485 | /* Indicate that this is a variant type. */ | |
9486 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, | |
9487 | gdb::array_view<discriminant_range> (ranges, | |
9488 | n_fields - 1)); | |
c9317f21 TT |
9489 | } |
9490 | } | |
9491 | ||
9492 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9493 | ||
9494 | static void | |
9495 | rust_union_quirks (struct dwarf2_cu *cu) | |
9496 | { | |
9497 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
9498 | for (type *type_ : cu->rust_unions) |
9499 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
9500 | /* We don't need this any more. */ |
9501 | cu->rust_unions.clear (); | |
c9317f21 TT |
9502 | } |
9503 | ||
95554aad TT |
9504 | /* Return the symtab for PER_CU. This works properly regardless of |
9505 | whether we're using the index or psymtabs. */ | |
9506 | ||
43f3e411 DE |
9507 | static struct compunit_symtab * |
9508 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 9509 | { |
ed2dc618 | 9510 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
9511 | ? per_cu->v.quick->compunit_symtab |
9512 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9513 | } |
9514 | ||
9515 | /* A helper function for computing the list of all symbol tables | |
9516 | included by PER_CU. */ | |
9517 | ||
9518 | static void | |
4c39bc03 | 9519 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9520 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9521 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9522 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9523 | { |
9524 | void **slot; | |
43f3e411 | 9525 | struct compunit_symtab *cust; |
95554aad TT |
9526 | |
9527 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9528 | if (*slot != NULL) | |
9529 | { | |
9530 | /* This inclusion and its children have been processed. */ | |
9531 | return; | |
9532 | } | |
9533 | ||
9534 | *slot = per_cu; | |
9535 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9536 | cust = get_compunit_symtab (per_cu); |
9537 | if (cust != NULL) | |
ec94af83 DE |
9538 | { |
9539 | /* If this is a type unit only add its symbol table if we haven't | |
9540 | seen it yet (type unit per_cu's can share symtabs). */ | |
9541 | if (per_cu->is_debug_types) | |
9542 | { | |
43f3e411 | 9543 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9544 | if (*slot == NULL) |
9545 | { | |
43f3e411 | 9546 | *slot = cust; |
4c39bc03 | 9547 | result->push_back (cust); |
43f3e411 DE |
9548 | if (cust->user == NULL) |
9549 | cust->user = immediate_parent; | |
ec94af83 DE |
9550 | } |
9551 | } | |
9552 | else | |
f9125b6c | 9553 | { |
4c39bc03 | 9554 | result->push_back (cust); |
43f3e411 DE |
9555 | if (cust->user == NULL) |
9556 | cust->user = immediate_parent; | |
f9125b6c | 9557 | } |
ec94af83 | 9558 | } |
95554aad | 9559 | |
ae640021 AB |
9560 | if (!per_cu->imported_symtabs_empty ()) |
9561 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9562 | { | |
9563 | recursively_compute_inclusions (result, all_children, | |
9564 | all_type_symtabs, ptr, cust); | |
9565 | } | |
95554aad TT |
9566 | } |
9567 | ||
43f3e411 | 9568 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9569 | PER_CU. */ |
9570 | ||
9571 | static void | |
43f3e411 | 9572 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9573 | { |
f4dc4d17 DE |
9574 | gdb_assert (! per_cu->is_debug_types); |
9575 | ||
ae640021 | 9576 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9577 | { |
ae640021 | 9578 | int len; |
4c39bc03 | 9579 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 9580 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9581 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9582 | |
9583 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9584 | if (cust == NULL) |
95554aad TT |
9585 | return; |
9586 | ||
9587 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9588 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9589 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9590 | NULL, xcalloc, xfree); | |
95554aad | 9591 | |
ae640021 | 9592 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 DE |
9593 | { |
9594 | recursively_compute_inclusions (&result_symtabs, all_children, | |
ae640021 | 9595 | all_type_symtabs, ptr, cust); |
ec94af83 | 9596 | } |
95554aad | 9597 | |
ec94af83 | 9598 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9599 | len = result_symtabs.size (); |
43f3e411 | 9600 | cust->includes |
ed2dc618 | 9601 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 9602 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9603 | memcpy (cust->includes, result_symtabs.data (), |
9604 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9605 | cust->includes[len] = NULL; |
95554aad | 9606 | |
95554aad | 9607 | htab_delete (all_children); |
ec94af83 | 9608 | htab_delete (all_type_symtabs); |
95554aad TT |
9609 | } |
9610 | } | |
9611 | ||
9612 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9613 | read. */ | |
9614 | ||
9615 | static void | |
ed2dc618 | 9616 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 9617 | { |
71b73764 | 9618 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
9619 | { |
9620 | if (! iter->is_debug_types) | |
43f3e411 | 9621 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9622 | } |
95554aad | 9623 | |
c5d0225d | 9624 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
9625 | } |
9626 | ||
9cdd5dbd | 9627 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9628 | already been loaded into memory. */ |
9629 | ||
9630 | static void | |
95554aad TT |
9631 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9632 | enum language pretend_language) | |
10b3939b | 9633 | { |
10b3939b | 9634 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
9635 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9636 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
08feed99 | 9637 | struct gdbarch *gdbarch = objfile->arch (); |
10b3939b | 9638 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9639 | struct compunit_symtab *cust; |
10b3939b | 9640 | CORE_ADDR baseaddr; |
4359dff1 | 9641 | struct block *static_block; |
3e29f34a | 9642 | CORE_ADDR addr; |
10b3939b | 9643 | |
b3b3bada | 9644 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9645 | |
c89b44cd TT |
9646 | /* Clear the list here in case something was left over. */ |
9647 | cu->method_list.clear (); | |
10b3939b | 9648 | |
95554aad TT |
9649 | cu->language = pretend_language; |
9650 | cu->language_defn = language_def (cu->language); | |
9651 | ||
c906108c | 9652 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9653 | process_die (cu->dies, cu); |
c906108c | 9654 | |
a766d390 DE |
9655 | /* For now fudge the Go package. */ |
9656 | if (cu->language == language_go) | |
9657 | fixup_go_packaging (cu); | |
9658 | ||
5f48f8f3 | 9659 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9660 | should be complete, and it should now be safe to compute all of the |
9661 | physnames. */ | |
9662 | compute_delayed_physnames (cu); | |
3da10d80 | 9663 | |
c9317f21 TT |
9664 | if (cu->language == language_rust) |
9665 | rust_union_quirks (cu); | |
9666 | ||
fae299cd DC |
9667 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9668 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9669 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9670 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9671 | |
3e29f34a | 9672 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9673 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9674 | |
9675 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9676 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9677 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9678 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9679 | this comp unit. */ | |
9680 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9681 | ||
c24bdb02 | 9682 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9683 | SECT_OFF_TEXT (objfile), |
9684 | 0); | |
c906108c | 9685 | |
43f3e411 | 9686 | if (cust != NULL) |
c906108c | 9687 | { |
df15bd07 | 9688 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9689 | |
8be455d7 JK |
9690 | /* Set symtab language to language from DW_AT_language. If the |
9691 | compilation is from a C file generated by language preprocessors, do | |
9692 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9693 | if (!(cu->language == language_c |
40e3ad0e | 9694 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9695 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9696 | |
9697 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9698 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9699 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9700 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9701 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9702 | |
9703 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9704 | needed, it would be wrong due to missing DW_AT_producer there. | |
9705 | ||
9706 | Still one can confuse GDB by using non-standard GCC compilation | |
9707 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9708 | */ |
ab260dad | 9709 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9710 | cust->locations_valid = 1; |
e0d00bc7 JK |
9711 | |
9712 | if (gcc_4_minor >= 5) | |
43f3e411 | 9713 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9714 | |
43f3e411 | 9715 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9716 | } |
9291a0cd TT |
9717 | |
9718 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9719 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9720 | else |
9721 | { | |
891813be | 9722 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9723 | pst->compunit_symtab = cust; |
6d94535f | 9724 | pst->readin = true; |
9291a0cd | 9725 | } |
c906108c | 9726 | |
95554aad | 9727 | /* Push it for inclusion processing later. */ |
c5d0225d | 9728 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
9729 | |
9730 | /* Not needed any more. */ | |
c24bdb02 | 9731 | cu->reset_builder (); |
f4dc4d17 | 9732 | } |
45cfd468 | 9733 | |
f4dc4d17 DE |
9734 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9735 | already been loaded into memory. */ | |
9736 | ||
9737 | static void | |
9738 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9739 | enum language pretend_language) | |
9740 | { | |
9741 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
9742 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9743 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 9744 | struct compunit_symtab *cust; |
0186c6a7 DE |
9745 | struct signatured_type *sig_type; |
9746 | ||
9747 | gdb_assert (per_cu->is_debug_types); | |
9748 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 9749 | |
c89b44cd TT |
9750 | /* Clear the list here in case something was left over. */ |
9751 | cu->method_list.clear (); | |
f4dc4d17 | 9752 | |
f4dc4d17 DE |
9753 | cu->language = pretend_language; |
9754 | cu->language_defn = language_def (cu->language); | |
9755 | ||
9756 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9757 | process_die (cu->dies, cu); | |
9758 | ||
9759 | /* For now fudge the Go package. */ | |
9760 | if (cu->language == language_go) | |
9761 | fixup_go_packaging (cu); | |
9762 | ||
5f48f8f3 | 9763 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9764 | should be complete, and it should now be safe to compute all of the |
9765 | physnames. */ | |
9766 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9767 | |
c9317f21 TT |
9768 | if (cu->language == language_rust) |
9769 | rust_union_quirks (cu); | |
9770 | ||
f4dc4d17 DE |
9771 | /* TUs share symbol tables. |
9772 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9773 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9774 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9775 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9776 | { |
c24bdb02 KS |
9777 | buildsym_compunit *builder = cu->get_builder (); |
9778 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 9779 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 9780 | |
43f3e411 | 9781 | if (cust != NULL) |
f4dc4d17 DE |
9782 | { |
9783 | /* Set symtab language to language from DW_AT_language. If the | |
9784 | compilation is from a C file generated by language preprocessors, | |
9785 | do not set the language if it was already deduced by | |
9786 | start_subfile. */ | |
43f3e411 DE |
9787 | if (!(cu->language == language_c |
9788 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9789 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9790 | } |
9791 | } | |
9792 | else | |
9793 | { | |
c24bdb02 | 9794 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 9795 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9796 | } |
9797 | ||
9798 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9799 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9800 | else |
9801 | { | |
891813be | 9802 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9803 | pst->compunit_symtab = cust; |
6d94535f | 9804 | pst->readin = true; |
45cfd468 | 9805 | } |
804d2729 TT |
9806 | |
9807 | /* Not needed any more. */ | |
c24bdb02 | 9808 | cu->reset_builder (); |
c906108c SS |
9809 | } |
9810 | ||
95554aad TT |
9811 | /* Process an imported unit DIE. */ |
9812 | ||
9813 | static void | |
9814 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9815 | { | |
9816 | struct attribute *attr; | |
9817 | ||
f4dc4d17 DE |
9818 | /* For now we don't handle imported units in type units. */ |
9819 | if (cu->per_cu->is_debug_types) | |
9820 | { | |
9821 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9822 | " supported in type units [in module %s]"), | |
518817b3 | 9823 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
9824 | } |
9825 | ||
95554aad TT |
9826 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9827 | if (attr != NULL) | |
9828 | { | |
0826b30a | 9829 | sect_offset sect_off = attr->get_ref_die_offset (); |
9c541725 PA |
9830 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
9831 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 9832 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 9833 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 9834 | |
58990295 TV |
9835 | /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit |
9836 | into another compilation unit, at root level. Regard this as a hint, | |
9837 | and ignore it. */ | |
9838 | if (die->parent && die->parent->parent == NULL | |
9839 | && per_cu->unit_type == DW_UT_compile | |
9840 | && per_cu->lang == language_cplus) | |
9841 | return; | |
9842 | ||
69d751e3 | 9843 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 9844 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 9845 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 9846 | |
ae640021 | 9847 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9848 | } |
9849 | } | |
9850 | ||
4c8aa72d PA |
9851 | /* RAII object that represents a process_die scope: i.e., |
9852 | starts/finishes processing a DIE. */ | |
9853 | class process_die_scope | |
adde2bff | 9854 | { |
4c8aa72d PA |
9855 | public: |
9856 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9857 | : m_die (die), m_cu (cu) | |
9858 | { | |
9859 | /* We should only be processing DIEs not already in process. */ | |
9860 | gdb_assert (!m_die->in_process); | |
9861 | m_die->in_process = true; | |
9862 | } | |
8c3cb9fa | 9863 | |
4c8aa72d PA |
9864 | ~process_die_scope () |
9865 | { | |
9866 | m_die->in_process = false; | |
9867 | ||
9868 | /* If we're done processing the DIE for the CU that owns the line | |
9869 | header, we don't need the line header anymore. */ | |
9870 | if (m_cu->line_header_die_owner == m_die) | |
9871 | { | |
9872 | delete m_cu->line_header; | |
9873 | m_cu->line_header = NULL; | |
9874 | m_cu->line_header_die_owner = NULL; | |
9875 | } | |
9876 | } | |
9877 | ||
9878 | private: | |
9879 | die_info *m_die; | |
9880 | dwarf2_cu *m_cu; | |
9881 | }; | |
adde2bff | 9882 | |
c906108c SS |
9883 | /* Process a die and its children. */ |
9884 | ||
9885 | static void | |
e7c27a73 | 9886 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9887 | { |
4c8aa72d | 9888 | process_die_scope scope (die, cu); |
adde2bff | 9889 | |
c906108c SS |
9890 | switch (die->tag) |
9891 | { | |
9892 | case DW_TAG_padding: | |
9893 | break; | |
9894 | case DW_TAG_compile_unit: | |
95554aad | 9895 | case DW_TAG_partial_unit: |
e7c27a73 | 9896 | read_file_scope (die, cu); |
c906108c | 9897 | break; |
348e048f DE |
9898 | case DW_TAG_type_unit: |
9899 | read_type_unit_scope (die, cu); | |
9900 | break; | |
c906108c | 9901 | case DW_TAG_subprogram: |
0a4b0913 AB |
9902 | /* Nested subprograms in Fortran get a prefix. */ |
9903 | if (cu->language == language_fortran | |
9904 | && die->parent != NULL | |
9905 | && die->parent->tag == DW_TAG_subprogram) | |
9906 | cu->processing_has_namespace_info = true; | |
9907 | /* Fall through. */ | |
c906108c | 9908 | case DW_TAG_inlined_subroutine: |
edb3359d | 9909 | read_func_scope (die, cu); |
c906108c SS |
9910 | break; |
9911 | case DW_TAG_lexical_block: | |
14898363 L |
9912 | case DW_TAG_try_block: |
9913 | case DW_TAG_catch_block: | |
e7c27a73 | 9914 | read_lexical_block_scope (die, cu); |
c906108c | 9915 | break; |
216f72a1 | 9916 | case DW_TAG_call_site: |
96408a79 SA |
9917 | case DW_TAG_GNU_call_site: |
9918 | read_call_site_scope (die, cu); | |
9919 | break; | |
c906108c | 9920 | case DW_TAG_class_type: |
680b30c7 | 9921 | case DW_TAG_interface_type: |
c906108c SS |
9922 | case DW_TAG_structure_type: |
9923 | case DW_TAG_union_type: | |
134d01f1 | 9924 | process_structure_scope (die, cu); |
c906108c SS |
9925 | break; |
9926 | case DW_TAG_enumeration_type: | |
134d01f1 | 9927 | process_enumeration_scope (die, cu); |
c906108c | 9928 | break; |
134d01f1 | 9929 | |
f792889a DJ |
9930 | /* These dies have a type, but processing them does not create |
9931 | a symbol or recurse to process the children. Therefore we can | |
9932 | read them on-demand through read_type_die. */ | |
c906108c | 9933 | case DW_TAG_subroutine_type: |
72019c9c | 9934 | case DW_TAG_set_type: |
c906108c | 9935 | case DW_TAG_array_type: |
c906108c | 9936 | case DW_TAG_pointer_type: |
c906108c | 9937 | case DW_TAG_ptr_to_member_type: |
c906108c | 9938 | case DW_TAG_reference_type: |
4297a3f0 | 9939 | case DW_TAG_rvalue_reference_type: |
c906108c | 9940 | case DW_TAG_string_type: |
c906108c | 9941 | break; |
134d01f1 | 9942 | |
c906108c | 9943 | case DW_TAG_base_type: |
a02abb62 | 9944 | case DW_TAG_subrange_type: |
cb249c71 | 9945 | case DW_TAG_typedef: |
134d01f1 DJ |
9946 | /* Add a typedef symbol for the type definition, if it has a |
9947 | DW_AT_name. */ | |
f792889a | 9948 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9949 | break; |
c906108c | 9950 | case DW_TAG_common_block: |
e7c27a73 | 9951 | read_common_block (die, cu); |
c906108c SS |
9952 | break; |
9953 | case DW_TAG_common_inclusion: | |
9954 | break; | |
d9fa45fe | 9955 | case DW_TAG_namespace: |
9068261f | 9956 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9957 | read_namespace (die, cu); |
d9fa45fe | 9958 | break; |
5d7cb8df | 9959 | case DW_TAG_module: |
9068261f | 9960 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9961 | read_module (die, cu); |
9962 | break; | |
d9fa45fe | 9963 | case DW_TAG_imported_declaration: |
9068261f | 9964 | cu->processing_has_namespace_info = true; |
74921315 KS |
9965 | if (read_namespace_alias (die, cu)) |
9966 | break; | |
86a73007 TT |
9967 | /* The declaration is not a global namespace alias. */ |
9968 | /* Fall through. */ | |
d9fa45fe | 9969 | case DW_TAG_imported_module: |
9068261f | 9970 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9971 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9972 | || cu->language != language_fortran)) | |
b98664d3 | 9973 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9974 | dwarf_tag_name (die->tag)); |
9975 | read_import_statement (die, cu); | |
d9fa45fe | 9976 | break; |
95554aad TT |
9977 | |
9978 | case DW_TAG_imported_unit: | |
9979 | process_imported_unit_die (die, cu); | |
9980 | break; | |
9981 | ||
71a3c369 TT |
9982 | case DW_TAG_variable: |
9983 | read_variable (die, cu); | |
9984 | break; | |
9985 | ||
c906108c | 9986 | default: |
e7c27a73 | 9987 | new_symbol (die, NULL, cu); |
c906108c SS |
9988 | break; |
9989 | } | |
9990 | } | |
ca69b9e6 DE |
9991 | \f |
9992 | /* DWARF name computation. */ | |
c906108c | 9993 | |
94af9270 KS |
9994 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9995 | needs to have the name of the scope prepended to the name listed in the | |
9996 | die. */ | |
9997 | ||
9998 | static int | |
9999 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10000 | { | |
1c809c68 TT |
10001 | struct attribute *attr; |
10002 | ||
94af9270 KS |
10003 | switch (die->tag) |
10004 | { | |
10005 | case DW_TAG_namespace: | |
10006 | case DW_TAG_typedef: | |
10007 | case DW_TAG_class_type: | |
10008 | case DW_TAG_interface_type: | |
10009 | case DW_TAG_structure_type: | |
10010 | case DW_TAG_union_type: | |
10011 | case DW_TAG_enumeration_type: | |
10012 | case DW_TAG_enumerator: | |
10013 | case DW_TAG_subprogram: | |
08a76f8a | 10014 | case DW_TAG_inlined_subroutine: |
94af9270 | 10015 | case DW_TAG_member: |
74921315 | 10016 | case DW_TAG_imported_declaration: |
94af9270 KS |
10017 | return 1; |
10018 | ||
10019 | case DW_TAG_variable: | |
c2b0a229 | 10020 | case DW_TAG_constant: |
94af9270 KS |
10021 | /* We only need to prefix "globally" visible variables. These include |
10022 | any variable marked with DW_AT_external or any variable that | |
10023 | lives in a namespace. [Variables in anonymous namespaces | |
10024 | require prefixing, but they are not DW_AT_external.] */ | |
10025 | ||
10026 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10027 | { | |
10028 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10029 | |
94af9270 KS |
10030 | return die_needs_namespace (die_specification (die, &spec_cu), |
10031 | spec_cu); | |
10032 | } | |
10033 | ||
1c809c68 | 10034 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10035 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10036 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10037 | return 0; |
10038 | /* A variable in a lexical block of some kind does not need a | |
10039 | namespace, even though in C++ such variables may be external | |
10040 | and have a mangled name. */ | |
10041 | if (die->parent->tag == DW_TAG_lexical_block | |
10042 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10043 | || die->parent->tag == DW_TAG_catch_block |
10044 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10045 | return 0; |
10046 | return 1; | |
94af9270 KS |
10047 | |
10048 | default: | |
10049 | return 0; | |
10050 | } | |
10051 | } | |
10052 | ||
73b9be8b KS |
10053 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10054 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10055 | defined for the given DIE. */ | |
10056 | ||
10057 | static struct attribute * | |
10058 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10059 | { | |
10060 | struct attribute *attr; | |
10061 | ||
10062 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10063 | if (attr == NULL) | |
10064 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10065 | ||
10066 | return attr; | |
10067 | } | |
10068 | ||
10069 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10070 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10071 | defined for the given DIE. */ | |
10072 | ||
10073 | static const char * | |
10074 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10075 | { | |
10076 | const char *linkage_name; | |
10077 | ||
10078 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10079 | if (linkage_name == NULL) | |
10080 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10081 | ||
787de330 TT |
10082 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
10083 | See https://github.com/rust-lang/rust/issues/32925. */ | |
10084 | if (cu->language == language_rust && linkage_name != NULL | |
10085 | && strchr (linkage_name, '{') != NULL) | |
10086 | linkage_name = NULL; | |
10087 | ||
73b9be8b KS |
10088 | return linkage_name; |
10089 | } | |
10090 | ||
94af9270 | 10091 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10092 | compute the physname for the object, which include a method's: |
9c37b5ae | 10093 | - formal parameters (C++), |
a766d390 | 10094 | - receiver type (Go), |
a766d390 DE |
10095 | |
10096 | The term "physname" is a bit confusing. | |
10097 | For C++, for example, it is the demangled name. | |
10098 | For Go, for example, it's the mangled name. | |
94af9270 | 10099 | |
af6b7be1 JB |
10100 | For Ada, return the DIE's linkage name rather than the fully qualified |
10101 | name. PHYSNAME is ignored.. | |
10102 | ||
94af9270 KS |
10103 | The result is allocated on the objfile_obstack and canonicalized. */ |
10104 | ||
10105 | static const char * | |
15d034d0 TT |
10106 | dwarf2_compute_name (const char *name, |
10107 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10108 | int physname) |
10109 | { | |
518817b3 | 10110 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10111 | |
94af9270 KS |
10112 | if (name == NULL) |
10113 | name = dwarf2_name (die, cu); | |
10114 | ||
2ee7123e DE |
10115 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10116 | but otherwise compute it by typename_concat inside GDB. | |
10117 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 10118 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 10119 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10120 | will set the demangled name to the result of dwarf2_full_name, and it is |
10121 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10122 | if (cu->language == language_ada |
10123 | || (cu->language == language_fortran && physname)) | |
10124 | { | |
10125 | /* For Ada unit, we prefer the linkage name over the name, as | |
10126 | the former contains the exported name, which the user expects | |
10127 | to be able to reference. Ideally, we want the user to be able | |
10128 | to reference this entity using either natural or linkage name, | |
10129 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10130 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10131 | |
2ee7123e DE |
10132 | if (linkage_name != NULL) |
10133 | return linkage_name; | |
f55ee35c JK |
10134 | } |
10135 | ||
94af9270 KS |
10136 | /* These are the only languages we know how to qualify names in. */ |
10137 | if (name != NULL | |
9c37b5ae | 10138 | && (cu->language == language_cplus |
c44af4eb TT |
10139 | || cu->language == language_fortran || cu->language == language_d |
10140 | || cu->language == language_rust)) | |
94af9270 KS |
10141 | { |
10142 | if (die_needs_namespace (die, cu)) | |
10143 | { | |
0d5cff50 | 10144 | const char *prefix; |
34a68019 | 10145 | const char *canonical_name = NULL; |
94af9270 | 10146 | |
d7e74731 PA |
10147 | string_file buf; |
10148 | ||
94af9270 | 10149 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10150 | if (*prefix != '\0') |
10151 | { | |
43816ebc TT |
10152 | gdb::unique_xmalloc_ptr<char> prefixed_name |
10153 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 10154 | |
43816ebc | 10155 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
10156 | } |
10157 | else | |
d7e74731 | 10158 | buf.puts (name); |
94af9270 | 10159 | |
98bfdba5 PA |
10160 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10161 | as children with DW_TAG_template_type_param or | |
10162 | DW_TAG_value_type_param. If the latter, add them to the name | |
10163 | here. If the name already has template parameters, then | |
10164 | skip this step; some versions of GCC emit both, and | |
10165 | it is more efficient to use the pre-computed name. | |
10166 | ||
10167 | Something to keep in mind about this process: it is very | |
10168 | unlikely, or in some cases downright impossible, to produce | |
10169 | something that will match the mangled name of a function. | |
10170 | If the definition of the function has the same debug info, | |
10171 | we should be able to match up with it anyway. But fallbacks | |
10172 | using the minimal symbol, for instance to find a method | |
10173 | implemented in a stripped copy of libstdc++, will not work. | |
10174 | If we do not have debug info for the definition, we will have to | |
10175 | match them up some other way. | |
10176 | ||
10177 | When we do name matching there is a related problem with function | |
10178 | templates; two instantiated function templates are allowed to | |
10179 | differ only by their return types, which we do not add here. */ | |
10180 | ||
10181 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10182 | { | |
10183 | struct attribute *attr; | |
10184 | struct die_info *child; | |
10185 | int first = 1; | |
10186 | ||
10187 | die->building_fullname = 1; | |
10188 | ||
10189 | for (child = die->child; child != NULL; child = child->sibling) | |
10190 | { | |
10191 | struct type *type; | |
12df843f | 10192 | LONGEST value; |
d521ce57 | 10193 | const gdb_byte *bytes; |
98bfdba5 PA |
10194 | struct dwarf2_locexpr_baton *baton; |
10195 | struct value *v; | |
10196 | ||
10197 | if (child->tag != DW_TAG_template_type_param | |
10198 | && child->tag != DW_TAG_template_value_param) | |
10199 | continue; | |
10200 | ||
10201 | if (first) | |
10202 | { | |
d7e74731 | 10203 | buf.puts ("<"); |
98bfdba5 PA |
10204 | first = 0; |
10205 | } | |
10206 | else | |
d7e74731 | 10207 | buf.puts (", "); |
98bfdba5 PA |
10208 | |
10209 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10210 | if (attr == NULL) | |
10211 | { | |
b98664d3 | 10212 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10213 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10214 | continue; |
10215 | } | |
10216 | type = die_type (child, cu); | |
10217 | ||
10218 | if (child->tag == DW_TAG_template_type_param) | |
10219 | { | |
c1ec8cea TT |
10220 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10221 | &type_print_raw_options); | |
98bfdba5 PA |
10222 | continue; |
10223 | } | |
10224 | ||
10225 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10226 | if (attr == NULL) | |
10227 | { | |
b98664d3 | 10228 | complaint (_("template parameter missing " |
3e43a32a | 10229 | "DW_AT_const_value")); |
d7e74731 | 10230 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10231 | continue; |
10232 | } | |
10233 | ||
10234 | dwarf2_const_value_attr (attr, type, name, | |
10235 | &cu->comp_unit_obstack, cu, | |
10236 | &value, &bytes, &baton); | |
10237 | ||
10238 | if (TYPE_NOSIGN (type)) | |
10239 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10240 | changed, this can use value_print instead. */ | |
d7e74731 | 10241 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10242 | else |
10243 | { | |
10244 | struct value_print_options opts; | |
10245 | ||
10246 | if (baton != NULL) | |
10247 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10248 | baton->data, | |
10249 | baton->size, | |
10250 | baton->per_cu); | |
10251 | else if (bytes != NULL) | |
10252 | { | |
10253 | v = allocate_value (type); | |
10254 | memcpy (value_contents_writeable (v), bytes, | |
10255 | TYPE_LENGTH (type)); | |
10256 | } | |
10257 | else | |
10258 | v = value_from_longest (type, value); | |
10259 | ||
3e43a32a MS |
10260 | /* Specify decimal so that we do not depend on |
10261 | the radix. */ | |
98bfdba5 PA |
10262 | get_formatted_print_options (&opts, 'd'); |
10263 | opts.raw = 1; | |
d7e74731 | 10264 | value_print (v, &buf, &opts); |
98bfdba5 | 10265 | release_value (v); |
98bfdba5 PA |
10266 | } |
10267 | } | |
10268 | ||
10269 | die->building_fullname = 0; | |
10270 | ||
10271 | if (!first) | |
10272 | { | |
10273 | /* Close the argument list, with a space if necessary | |
10274 | (nested templates). */ | |
d7e74731 PA |
10275 | if (!buf.empty () && buf.string ().back () == '>') |
10276 | buf.puts (" >"); | |
98bfdba5 | 10277 | else |
d7e74731 | 10278 | buf.puts (">"); |
98bfdba5 PA |
10279 | } |
10280 | } | |
10281 | ||
9c37b5ae | 10282 | /* For C++ methods, append formal parameter type |
94af9270 | 10283 | information, if PHYSNAME. */ |
6e70227d | 10284 | |
94af9270 | 10285 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10286 | && cu->language == language_cplus) |
94af9270 KS |
10287 | { |
10288 | struct type *type = read_type_die (die, cu); | |
10289 | ||
d7e74731 | 10290 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10291 | &type_print_raw_options); |
94af9270 | 10292 | |
9c37b5ae | 10293 | if (cu->language == language_cplus) |
94af9270 | 10294 | { |
60430eff DJ |
10295 | /* Assume that an artificial first parameter is |
10296 | "this", but do not crash if it is not. RealView | |
10297 | marks unnamed (and thus unused) parameters as | |
10298 | artificial; there is no way to differentiate | |
10299 | the two cases. */ | |
94af9270 KS |
10300 | if (TYPE_NFIELDS (type) > 0 |
10301 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
78134374 | 10302 | && TYPE_FIELD_TYPE (type, 0)->code () == TYPE_CODE_PTR |
3e43a32a MS |
10303 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10304 | 0)))) | |
d7e74731 | 10305 | buf.puts (" const"); |
94af9270 KS |
10306 | } |
10307 | } | |
10308 | ||
d7e74731 | 10309 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10310 | |
10311 | if (cu->language == language_cplus) | |
34a68019 | 10312 | canonical_name |
322a8516 | 10313 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
be1e3d3e | 10314 | objfile); |
34a68019 TT |
10315 | |
10316 | /* If we only computed INTERMEDIATE_NAME, or if | |
10317 | INTERMEDIATE_NAME is already canonical, then we need to | |
be1e3d3e | 10318 | intern it. */ |
322a8516 | 10319 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
be1e3d3e | 10320 | name = objfile->intern (intermediate_name); |
34a68019 TT |
10321 | else |
10322 | name = canonical_name; | |
94af9270 KS |
10323 | } |
10324 | } | |
10325 | ||
10326 | return name; | |
10327 | } | |
10328 | ||
0114d602 DJ |
10329 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10330 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10331 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10332 | not have a name. NAME may either be from a previous call to |
10333 | dwarf2_name or NULL. | |
10334 | ||
9c37b5ae | 10335 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10336 | |
10337 | static const char * | |
15d034d0 | 10338 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10339 | { |
94af9270 KS |
10340 | return dwarf2_compute_name (name, die, cu, 0); |
10341 | } | |
0114d602 | 10342 | |
94af9270 KS |
10343 | /* Construct a physname for the given DIE in CU. NAME may either be |
10344 | from a previous call to dwarf2_name or NULL. The result will be | |
10345 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10346 | name. | |
0114d602 | 10347 | |
9c37b5ae | 10348 | The output string will be canonicalized (if C++). */ |
0114d602 | 10349 | |
94af9270 | 10350 | static const char * |
15d034d0 | 10351 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10352 | { |
518817b3 | 10353 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 10354 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10355 | int need_copy = 1; |
10356 | ||
10357 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10358 | on its own. */ | |
10359 | if (!die_needs_namespace (die, cu)) | |
10360 | return dwarf2_compute_name (name, die, cu, 1); | |
10361 | ||
906bb4c5 TT |
10362 | if (cu->language != language_rust) |
10363 | mangled = dw2_linkage_name (die, cu); | |
900e11f9 JK |
10364 | |
10365 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
10366 | has computed. */ | |
791afaa2 | 10367 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10368 | if (mangled != NULL) |
900e11f9 | 10369 | { |
900e11f9 | 10370 | |
59cc4834 JB |
10371 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
10372 | { | |
10373 | /* Do nothing (do not demangle the symbol name). */ | |
10374 | } | |
10375 | else if (cu->language == language_go) | |
a766d390 | 10376 | { |
5e2db402 TT |
10377 | /* This is a lie, but we already lie to the caller new_symbol. |
10378 | new_symbol assumes we return the mangled name. | |
a766d390 | 10379 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
10380 | } |
10381 | else | |
10382 | { | |
0eb876f5 JB |
10383 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10384 | their return type. It is easier for GDB users to search | |
10385 | for such functions as `name(params)' than `long name(params)'. | |
10386 | In such case the minimal symbol names do not match the full | |
10387 | symbol names but for template functions there is never a need | |
10388 | to look up their definition from their declaration so | |
10389 | the only disadvantage remains the minimal symbol variant | |
10390 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10391 | demangled.reset (gdb_demangle (mangled, |
10392 | (DMGL_PARAMS | DMGL_ANSI | |
10393 | | DMGL_RET_DROP))); | |
a766d390 | 10394 | } |
900e11f9 | 10395 | if (demangled) |
791afaa2 | 10396 | canon = demangled.get (); |
900e11f9 JK |
10397 | else |
10398 | { | |
10399 | canon = mangled; | |
10400 | need_copy = 0; | |
10401 | } | |
10402 | } | |
10403 | ||
10404 | if (canon == NULL || check_physname) | |
10405 | { | |
10406 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10407 | ||
10408 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10409 | { | |
10410 | /* It may not mean a bug in GDB. The compiler could also | |
10411 | compute DW_AT_linkage_name incorrectly. But in such case | |
10412 | GDB would need to be bug-to-bug compatible. */ | |
10413 | ||
b98664d3 | 10414 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10415 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10416 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10417 | objfile_name (objfile)); |
900e11f9 JK |
10418 | |
10419 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10420 | is available here - over computed PHYSNAME. It is safer | |
10421 | against both buggy GDB and buggy compilers. */ | |
10422 | ||
10423 | retval = canon; | |
10424 | } | |
10425 | else | |
10426 | { | |
10427 | retval = physname; | |
10428 | need_copy = 0; | |
10429 | } | |
10430 | } | |
10431 | else | |
10432 | retval = canon; | |
10433 | ||
10434 | if (need_copy) | |
be1e3d3e | 10435 | retval = objfile->intern (retval); |
900e11f9 | 10436 | |
900e11f9 | 10437 | return retval; |
0114d602 DJ |
10438 | } |
10439 | ||
74921315 KS |
10440 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10441 | a new symbol for it. | |
10442 | ||
10443 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10444 | ||
10445 | static int | |
10446 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10447 | { | |
10448 | struct attribute *attr; | |
10449 | ||
10450 | /* If the die does not have a name, this is not a namespace | |
10451 | alias. */ | |
10452 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10453 | if (attr != NULL) | |
10454 | { | |
10455 | int num; | |
10456 | struct die_info *d = die; | |
10457 | struct dwarf2_cu *imported_cu = cu; | |
10458 | ||
10459 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10460 | keep inspecting DIEs until we hit the underlying import. */ | |
10461 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10462 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10463 | { | |
10464 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10465 | if (attr == NULL) | |
10466 | break; | |
10467 | ||
10468 | d = follow_die_ref (d, attr, &imported_cu); | |
10469 | if (d->tag != DW_TAG_imported_declaration) | |
10470 | break; | |
10471 | } | |
10472 | ||
10473 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10474 | { | |
b98664d3 | 10475 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10476 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10477 | return 0; |
10478 | } | |
10479 | ||
10480 | if (attr != NULL) | |
10481 | { | |
10482 | struct type *type; | |
0826b30a | 10483 | sect_offset sect_off = attr->get_ref_die_offset (); |
74921315 | 10484 | |
9c541725 | 10485 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
78134374 | 10486 | if (type != NULL && type->code () == TYPE_CODE_NAMESPACE) |
74921315 KS |
10487 | { |
10488 | /* This declaration is a global namespace alias. Add | |
10489 | a symbol for it whose type is the aliased namespace. */ | |
10490 | new_symbol (die, type, cu); | |
10491 | return 1; | |
10492 | } | |
10493 | } | |
10494 | } | |
10495 | ||
10496 | return 0; | |
10497 | } | |
10498 | ||
22cee43f | 10499 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10500 | current context for CU. |
22cee43f PMR |
10501 | |
10502 | For Ada, imported declarations can materialize renamings, which *may* be | |
10503 | global. However it is impossible (for now?) in DWARF to distinguish | |
10504 | "external" imported declarations and "static" ones. As all imported | |
10505 | declarations seem to be static in all other languages, make them all CU-wide | |
10506 | global only in Ada. */ | |
10507 | ||
10508 | static struct using_direct ** | |
804d2729 | 10509 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10510 | { |
c24bdb02 KS |
10511 | if (cu->language == language_ada |
10512 | && cu->get_builder ()->outermost_context_p ()) | |
10513 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10514 | else |
c24bdb02 | 10515 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10516 | } |
10517 | ||
27aa8d6a SW |
10518 | /* Read the import statement specified by the given die and record it. */ |
10519 | ||
10520 | static void | |
10521 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10522 | { | |
518817b3 | 10523 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 10524 | struct attribute *import_attr; |
32019081 | 10525 | struct die_info *imported_die, *child_die; |
de4affc9 | 10526 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10527 | const char *imported_name; |
794684b6 | 10528 | const char *imported_name_prefix; |
13387711 SW |
10529 | const char *canonical_name; |
10530 | const char *import_alias; | |
10531 | const char *imported_declaration = NULL; | |
794684b6 | 10532 | const char *import_prefix; |
eb1e02fd | 10533 | std::vector<const char *> excludes; |
13387711 | 10534 | |
27aa8d6a SW |
10535 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10536 | if (import_attr == NULL) | |
10537 | { | |
b98664d3 | 10538 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10539 | dwarf_tag_name (die->tag)); |
10540 | return; | |
10541 | } | |
10542 | ||
de4affc9 CC |
10543 | imported_cu = cu; |
10544 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10545 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10546 | if (imported_name == NULL) |
10547 | { | |
10548 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10549 | ||
10550 | The import in the following code: | |
10551 | namespace A | |
10552 | { | |
10553 | typedef int B; | |
10554 | } | |
10555 | ||
10556 | int main () | |
10557 | { | |
10558 | using A::B; | |
10559 | B b; | |
10560 | return b; | |
10561 | } | |
10562 | ||
10563 | ... | |
10564 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10565 | <52> DW_AT_decl_file : 1 | |
10566 | <53> DW_AT_decl_line : 6 | |
10567 | <54> DW_AT_import : <0x75> | |
10568 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10569 | <59> DW_AT_name : B | |
10570 | <5b> DW_AT_decl_file : 1 | |
10571 | <5c> DW_AT_decl_line : 2 | |
10572 | <5d> DW_AT_type : <0x6e> | |
10573 | ... | |
10574 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10575 | <76> DW_AT_byte_size : 4 | |
10576 | <77> DW_AT_encoding : 5 (signed) | |
10577 | ||
10578 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10579 | This case will be ignored until the gcc bug is fixed. */ | |
10580 | return; | |
10581 | } | |
10582 | ||
82856980 SW |
10583 | /* Figure out the local name after import. */ |
10584 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10585 | |
794684b6 SW |
10586 | /* Figure out where the statement is being imported to. */ |
10587 | import_prefix = determine_prefix (die, cu); | |
10588 | ||
10589 | /* Figure out what the scope of the imported die is and prepend it | |
10590 | to the name of the imported die. */ | |
de4affc9 | 10591 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10592 | |
f55ee35c JK |
10593 | if (imported_die->tag != DW_TAG_namespace |
10594 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10595 | { |
13387711 SW |
10596 | imported_declaration = imported_name; |
10597 | canonical_name = imported_name_prefix; | |
794684b6 | 10598 | } |
13387711 | 10599 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10600 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10601 | imported_name_prefix, |
10602 | (cu->language == language_d ? "." : "::"), | |
10603 | imported_name, (char *) NULL); | |
13387711 SW |
10604 | else |
10605 | canonical_name = imported_name; | |
794684b6 | 10606 | |
32019081 JK |
10607 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10608 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 10609 | child_die = child_die->sibling) |
32019081 JK |
10610 | { |
10611 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10612 | represented by an imported module entry with an import attribute | |
10613 | referring to the module and owned entries corresponding to those | |
10614 | entities that are renamed as part of being imported. */ | |
10615 | ||
10616 | if (child_die->tag != DW_TAG_imported_declaration) | |
10617 | { | |
b98664d3 | 10618 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10619 | "- DIE at %s [in module %s]"), |
10620 | sect_offset_str (child_die->sect_off), | |
10621 | objfile_name (objfile)); | |
32019081 JK |
10622 | continue; |
10623 | } | |
10624 | ||
10625 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10626 | if (import_attr == NULL) | |
10627 | { | |
b98664d3 | 10628 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10629 | dwarf_tag_name (child_die->tag)); |
10630 | continue; | |
10631 | } | |
10632 | ||
10633 | imported_cu = cu; | |
10634 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10635 | &imported_cu); | |
10636 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10637 | if (imported_name == NULL) | |
10638 | { | |
b98664d3 | 10639 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10640 | "imported name - DIE at %s [in module %s]"), |
10641 | sect_offset_str (child_die->sect_off), | |
10642 | objfile_name (objfile)); | |
32019081 JK |
10643 | continue; |
10644 | } | |
10645 | ||
eb1e02fd | 10646 | excludes.push_back (imported_name); |
32019081 JK |
10647 | |
10648 | process_die (child_die, cu); | |
10649 | } | |
10650 | ||
804d2729 | 10651 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10652 | import_prefix, |
10653 | canonical_name, | |
10654 | import_alias, | |
10655 | imported_declaration, | |
10656 | excludes, | |
10657 | 0, | |
10658 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10659 | } |
10660 | ||
5230b05a WT |
10661 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10662 | types, but gives them a size of zero. Starting with version 14, | |
10663 | ICC is compatible with GCC. */ | |
10664 | ||
9068261f | 10665 | static bool |
5230b05a WT |
10666 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10667 | { | |
10668 | if (!cu->checked_producer) | |
10669 | check_producer (cu); | |
10670 | ||
10671 | return cu->producer_is_icc_lt_14; | |
10672 | } | |
10673 | ||
eb77c9df AB |
10674 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10675 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10676 | which says that void functions should not have a DW_AT_type. */ | |
10677 | ||
10678 | static bool | |
10679 | producer_is_icc (struct dwarf2_cu *cu) | |
10680 | { | |
10681 | if (!cu->checked_producer) | |
10682 | check_producer (cu); | |
10683 | ||
10684 | return cu->producer_is_icc; | |
10685 | } | |
10686 | ||
1b80a9fa JK |
10687 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10688 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10689 | this, it was first present in GCC release 4.3.0. */ | |
10690 | ||
9068261f | 10691 | static bool |
1b80a9fa JK |
10692 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10693 | { | |
10694 | if (!cu->checked_producer) | |
10695 | check_producer (cu); | |
10696 | ||
10697 | return cu->producer_is_gcc_lt_4_3; | |
10698 | } | |
10699 | ||
d721ba37 PA |
10700 | static file_and_directory |
10701 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10702 | { |
d721ba37 PA |
10703 | file_and_directory res; |
10704 | ||
9291a0cd TT |
10705 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10706 | is not a source language identifier. */ | |
d721ba37 PA |
10707 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10708 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10709 | |
d721ba37 PA |
10710 | if (res.comp_dir == NULL |
10711 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10712 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10713 | { |
d721ba37 PA |
10714 | res.comp_dir_storage = ldirname (res.name); |
10715 | if (!res.comp_dir_storage.empty ()) | |
10716 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10717 | } |
d721ba37 | 10718 | if (res.comp_dir != NULL) |
9291a0cd TT |
10719 | { |
10720 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10721 | directory, get rid of it. */ | |
d721ba37 | 10722 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10723 | |
d721ba37 PA |
10724 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10725 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10726 | } |
10727 | ||
d721ba37 PA |
10728 | if (res.name == NULL) |
10729 | res.name = "<unknown>"; | |
10730 | ||
10731 | return res; | |
9291a0cd TT |
10732 | } |
10733 | ||
f4dc4d17 DE |
10734 | /* Handle DW_AT_stmt_list for a compilation unit. |
10735 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10736 | COMP_DIR is the compilation directory. LOWPC is passed to |
10737 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10738 | |
10739 | static void | |
10740 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10741 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10742 | { |
518817b3 SM |
10743 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10744 | = cu->per_cu->dwarf2_per_objfile; | |
2ab95328 | 10745 | struct attribute *attr; |
527f3840 JK |
10746 | struct line_header line_header_local; |
10747 | hashval_t line_header_local_hash; | |
527f3840 JK |
10748 | void **slot; |
10749 | int decode_mapping; | |
2ab95328 | 10750 | |
f4dc4d17 DE |
10751 | gdb_assert (! cu->per_cu->is_debug_types); |
10752 | ||
2ab95328 | 10753 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10754 | if (attr == NULL) |
10755 | return; | |
10756 | ||
9c541725 | 10757 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10758 | |
10759 | /* The line header hash table is only created if needed (it exists to | |
10760 | prevent redundant reading of the line table for partial_units). | |
10761 | If we're given a partial_unit, we'll need it. If we're given a | |
10762 | compile_unit, then use the line header hash table if it's already | |
10763 | created, but don't create one just yet. */ | |
10764 | ||
10765 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10766 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10767 | { |
527f3840 | 10768 | dwarf2_per_objfile->line_header_hash |
d15acc42 TT |
10769 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10770 | line_header_eq_voidp, | |
10771 | free_line_header_voidp, | |
10772 | xcalloc, xfree)); | |
527f3840 | 10773 | } |
2ab95328 | 10774 | |
9c541725 | 10775 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10776 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10777 | line_header_local_hash = line_header_hash (&line_header_local); | |
10778 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10779 | { | |
d15acc42 | 10780 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10781 | &line_header_local, |
10782 | line_header_local_hash, NO_INSERT); | |
10783 | ||
10784 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10785 | is not present in *SLOT (since if there is something in *SLOT then | |
10786 | it will be for a partial_unit). */ | |
10787 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10788 | { |
527f3840 | 10789 | gdb_assert (*slot != NULL); |
9a3c8263 | 10790 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10791 | return; |
dee91e82 | 10792 | } |
2ab95328 | 10793 | } |
527f3840 JK |
10794 | |
10795 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10796 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10797 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10798 | if (lh == NULL) | |
527f3840 | 10799 | return; |
4c8aa72d PA |
10800 | |
10801 | cu->line_header = lh.release (); | |
10802 | cu->line_header_die_owner = die; | |
527f3840 JK |
10803 | |
10804 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10805 | slot = NULL; | |
10806 | else | |
10807 | { | |
d15acc42 | 10808 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10809 | &line_header_local, |
10810 | line_header_local_hash, INSERT); | |
10811 | gdb_assert (slot != NULL); | |
10812 | } | |
10813 | if (slot != NULL && *slot == NULL) | |
10814 | { | |
10815 | /* This newly decoded line number information unit will be owned | |
10816 | by line_header_hash hash table. */ | |
10817 | *slot = cu->line_header; | |
4c8aa72d | 10818 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10819 | } |
10820 | else | |
10821 | { | |
10822 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10823 | may be already used by multiple CUs. Create only temporary decoded | |
10824 | line_header for this CU - it may happen at most once for each line | |
10825 | number information unit. And if we're not using line_header_hash | |
10826 | then this is what we want as well. */ | |
10827 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10828 | } |
10829 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10830 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10831 | decode_mapping); | |
fff8551c | 10832 | |
2ab95328 TT |
10833 | } |
10834 | ||
95554aad | 10835 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10836 | |
c906108c | 10837 | static void |
e7c27a73 | 10838 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10839 | { |
518817b3 SM |
10840 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10841 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 10842 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 10843 | struct gdbarch *gdbarch = objfile->arch (); |
2acceee2 | 10844 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10845 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10846 | struct attribute *attr; | |
c906108c | 10847 | struct die_info *child_die; |
e142c38c | 10848 | CORE_ADDR baseaddr; |
6e70227d | 10849 | |
380618d6 | 10850 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10851 | baseaddr = objfile->text_section_offset (); |
c906108c | 10852 | |
fae299cd | 10853 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10854 | |
10855 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10856 | from finish_block. */ | |
2acceee2 | 10857 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10858 | lowpc = highpc; |
3e29f34a | 10859 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10860 | |
d721ba37 | 10861 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10862 | |
f4b8a18d KW |
10863 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10864 | standardised yet. As a workaround for the language detection we fall | |
10865 | back to the DW_AT_producer string. */ | |
10866 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10867 | cu->language = language_opencl; | |
10868 | ||
3019eac3 DE |
10869 | /* Similar hack for Go. */ |
10870 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10871 | set_cu_language (DW_LANG_Go, cu); | |
10872 | ||
c24bdb02 | 10873 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10874 | |
10875 | /* Decode line number information if present. We do this before | |
10876 | processing child DIEs, so that the line header table is available | |
10877 | for DW_AT_decl_file. */ | |
d721ba37 | 10878 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10879 | |
10880 | /* Process all dies in compilation unit. */ | |
10881 | if (die->child != NULL) | |
10882 | { | |
10883 | child_die = die->child; | |
10884 | while (child_die && child_die->tag) | |
10885 | { | |
10886 | process_die (child_die, cu); | |
436c571c | 10887 | child_die = child_die->sibling; |
3019eac3 DE |
10888 | } |
10889 | } | |
10890 | ||
10891 | /* Decode macro information, if present. Dwarf 2 macro information | |
10892 | refers to information in the line number info statement program | |
10893 | header, so we can only read it if we've read the header | |
10894 | successfully. */ | |
0af92d60 JK |
10895 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10896 | if (attr == NULL) | |
10897 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10898 | if (attr && cu->line_header) |
10899 | { | |
10900 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10901 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10902 | |
43f3e411 | 10903 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10904 | } |
10905 | else | |
10906 | { | |
10907 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10908 | if (attr && cu->line_header) | |
10909 | { | |
10910 | unsigned int macro_offset = DW_UNSND (attr); | |
10911 | ||
43f3e411 | 10912 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10913 | } |
10914 | } | |
3019eac3 DE |
10915 | } |
10916 | ||
c24bdb02 KS |
10917 | void |
10918 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10919 | { |
f4dc4d17 DE |
10920 | struct type_unit_group *tu_group; |
10921 | int first_time; | |
3019eac3 | 10922 | struct attribute *attr; |
9c541725 | 10923 | unsigned int i; |
0186c6a7 | 10924 | struct signatured_type *sig_type; |
3019eac3 | 10925 | |
f4dc4d17 | 10926 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10927 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10928 | |
c24bdb02 | 10929 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10930 | |
f4dc4d17 | 10931 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10932 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10933 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10934 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10935 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10936 | |
10937 | /* If we've already processed this stmt_list there's no real need to | |
10938 | do it again, we could fake it and just recreate the part we need | |
10939 | (file name,index -> symtab mapping). If data shows this optimization | |
10940 | is useful we can do it then. */ | |
43f3e411 | 10941 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10942 | |
10943 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10944 | debug info. */ | |
fff8551c | 10945 | line_header_up lh; |
f4dc4d17 | 10946 | if (attr != NULL) |
3019eac3 | 10947 | { |
9c541725 | 10948 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 10949 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10950 | } |
10951 | if (lh == NULL) | |
10952 | { | |
10953 | if (first_time) | |
c24bdb02 | 10954 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10955 | else |
10956 | { | |
10957 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 10958 | gdb_assert (m_builder == nullptr); |
804d2729 | 10959 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10960 | m_builder.reset (new struct buildsym_compunit |
10961 | (COMPUNIT_OBJFILE (cust), "", | |
10962 | COMPUNIT_DIRNAME (cust), | |
10963 | compunit_language (cust), | |
10964 | 0, cust)); | |
770479f2 | 10965 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 10966 | } |
f4dc4d17 | 10967 | return; |
3019eac3 DE |
10968 | } |
10969 | ||
c24bdb02 KS |
10970 | line_header = lh.release (); |
10971 | line_header_die_owner = die; | |
3019eac3 | 10972 | |
f4dc4d17 DE |
10973 | if (first_time) |
10974 | { | |
c24bdb02 | 10975 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10976 | |
1fd60fc0 DE |
10977 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10978 | still initializing it, and our caller (a few levels up) | |
10979 | process_full_type_unit still needs to know if this is the first | |
10980 | time. */ | |
10981 | ||
4ac93832 TT |
10982 | tu_group->symtabs |
10983 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, | |
10984 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10985 | |
7ba99d21 AT |
10986 | auto &file_names = line_header->file_names (); |
10987 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10988 | { |
7ba99d21 | 10989 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10990 | dwarf2_start_subfile (this, fe.name, |
10991 | fe.include_dir (line_header)); | |
10992 | buildsym_compunit *b = get_builder (); | |
10993 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10994 | { |
4c8aa72d PA |
10995 | /* NOTE: start_subfile will recognize when it's been |
10996 | passed a file it has already seen. So we can't | |
10997 | assume there's a simple mapping from | |
10998 | cu->line_header->file_names to subfiles, plus | |
10999 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
11000 | b->get_current_subfile ()->symtab |
11001 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
11002 | } |
11003 | ||
c24bdb02 | 11004 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 11005 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
11006 | } |
11007 | } | |
11008 | else | |
3019eac3 | 11009 | { |
c24bdb02 | 11010 | gdb_assert (m_builder == nullptr); |
804d2729 | 11011 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11012 | m_builder.reset (new struct buildsym_compunit |
11013 | (COMPUNIT_OBJFILE (cust), "", | |
11014 | COMPUNIT_DIRNAME (cust), | |
11015 | compunit_language (cust), | |
11016 | 0, cust)); | |
770479f2 | 11017 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 11018 | |
7ba99d21 AT |
11019 | auto &file_names = line_header->file_names (); |
11020 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 11021 | { |
7ba99d21 | 11022 | file_entry &fe = file_names[i]; |
4c8aa72d | 11023 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11024 | } |
3019eac3 DE |
11025 | } |
11026 | ||
f4dc4d17 DE |
11027 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11028 | so they don't have a "real" (so to speak) symtab anyway. | |
11029 | There is later code that will assign the main symtab to all symbols | |
11030 | that don't have one. We need to handle the case of a symbol with a | |
11031 | missing symtab (DW_AT_decl_file) anyway. */ | |
11032 | } | |
3019eac3 | 11033 | |
f4dc4d17 DE |
11034 | /* Process DW_TAG_type_unit. |
11035 | For TUs we want to skip the first top level sibling if it's not the | |
11036 | actual type being defined by this TU. In this case the first top | |
11037 | level sibling is there to provide context only. */ | |
3019eac3 | 11038 | |
f4dc4d17 DE |
11039 | static void |
11040 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11041 | { | |
11042 | struct die_info *child_die; | |
3019eac3 | 11043 | |
f4dc4d17 DE |
11044 | prepare_one_comp_unit (cu, die, language_minimal); |
11045 | ||
11046 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11047 | We do this before processing child DIEs, so that the line header table | |
11048 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 11049 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
11050 | |
11051 | if (die->child != NULL) | |
11052 | { | |
11053 | child_die = die->child; | |
11054 | while (child_die && child_die->tag) | |
11055 | { | |
11056 | process_die (child_die, cu); | |
436c571c | 11057 | child_die = child_die->sibling; |
f4dc4d17 DE |
11058 | } |
11059 | } | |
3019eac3 DE |
11060 | } |
11061 | \f | |
80626a55 DE |
11062 | /* DWO/DWP files. |
11063 | ||
11064 | http://gcc.gnu.org/wiki/DebugFission | |
11065 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11066 | ||
11067 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11068 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11069 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11070 | |
11071 | static hashval_t | |
11072 | hash_dwo_file (const void *item) | |
11073 | { | |
9a3c8263 | 11074 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11075 | hashval_t hash; |
3019eac3 | 11076 | |
a2ce51a0 DE |
11077 | hash = htab_hash_string (dwo_file->dwo_name); |
11078 | if (dwo_file->comp_dir != NULL) | |
11079 | hash += htab_hash_string (dwo_file->comp_dir); | |
11080 | return hash; | |
3019eac3 DE |
11081 | } |
11082 | ||
11083 | static int | |
11084 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11085 | { | |
9a3c8263 SM |
11086 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11087 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11088 | |
a2ce51a0 DE |
11089 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11090 | return 0; | |
11091 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11092 | return lhs->comp_dir == rhs->comp_dir; | |
11093 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11094 | } |
11095 | ||
11096 | /* Allocate a hash table for DWO files. */ | |
11097 | ||
51ac9db5 | 11098 | static htab_up |
298e9637 | 11099 | allocate_dwo_file_hash_table () |
3019eac3 | 11100 | { |
51ac9db5 SM |
11101 | auto delete_dwo_file = [] (void *item) |
11102 | { | |
11103 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11104 | ||
11105 | delete dwo_file; | |
11106 | }; | |
11107 | ||
bc68fb19 TT |
11108 | return htab_up (htab_create_alloc (41, |
11109 | hash_dwo_file, | |
11110 | eq_dwo_file, | |
11111 | delete_dwo_file, | |
11112 | xcalloc, xfree)); | |
3019eac3 DE |
11113 | } |
11114 | ||
80626a55 DE |
11115 | /* Lookup DWO file DWO_NAME. */ |
11116 | ||
11117 | static void ** | |
ed2dc618 SM |
11118 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11119 | const char *dwo_name, | |
11120 | const char *comp_dir) | |
80626a55 DE |
11121 | { |
11122 | struct dwo_file find_entry; | |
11123 | void **slot; | |
11124 | ||
11125 | if (dwarf2_per_objfile->dwo_files == NULL) | |
298e9637 | 11126 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); |
80626a55 | 11127 | |
0ac5b59e DE |
11128 | find_entry.dwo_name = dwo_name; |
11129 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11130 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11131 | INSERT); | |
80626a55 DE |
11132 | |
11133 | return slot; | |
11134 | } | |
11135 | ||
3019eac3 DE |
11136 | static hashval_t |
11137 | hash_dwo_unit (const void *item) | |
11138 | { | |
9a3c8263 | 11139 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11140 | |
11141 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11142 | return dwo_unit->signature; | |
11143 | } | |
11144 | ||
11145 | static int | |
11146 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11147 | { | |
9a3c8263 SM |
11148 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11149 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11150 | |
11151 | /* The signature is assumed to be unique within the DWO file. | |
11152 | So while object file CU dwo_id's always have the value zero, | |
11153 | that's OK, assuming each object file DWO file has only one CU, | |
11154 | and that's the rule for now. */ | |
11155 | return lhs->signature == rhs->signature; | |
11156 | } | |
11157 | ||
11158 | /* Allocate a hash table for DWO CUs,TUs. | |
11159 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11160 | ||
b0b6a987 | 11161 | static htab_up |
298e9637 | 11162 | allocate_dwo_unit_table () |
3019eac3 DE |
11163 | { |
11164 | /* Start out with a pretty small number. | |
11165 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
11166 | return htab_up (htab_create_alloc (3, |
11167 | hash_dwo_unit, | |
11168 | eq_dwo_unit, | |
11169 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
11170 | } |
11171 | ||
19c3d4c9 | 11172 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11173 | |
11174 | static void | |
19c3d4c9 DE |
11175 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11176 | const gdb_byte *info_ptr, | |
11177 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
11178 | struct dwo_file *dwo_file, |
11179 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
11180 | { |
11181 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11182 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11183 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 11184 | |
a084a2a6 AT |
11185 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11186 | if (!signature.has_value ()) | |
3019eac3 | 11187 | { |
b98664d3 | 11188 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11189 | " its dwo_id [in module %s]"), |
9d8780f0 | 11190 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11191 | return; |
11192 | } | |
11193 | ||
3019eac3 | 11194 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11195 | dwo_unit->signature = *signature; |
8a0459fd | 11196 | dwo_unit->section = section; |
9c541725 | 11197 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11198 | dwo_unit->length = cu->per_cu->length; |
11199 | ||
b4f54984 | 11200 | if (dwarf_read_debug) |
9d8780f0 SM |
11201 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11202 | sect_offset_str (sect_off), | |
9c541725 | 11203 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11204 | } |
11205 | ||
33c5cd75 | 11206 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11207 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11208 | |
33c5cd75 | 11209 | static void |
ed2dc618 | 11210 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e | 11211 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 11212 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 DE |
11213 | { |
11214 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11215 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11216 | |
96b79293 | 11217 | section.read (objfile); |
33c5cd75 | 11218 | info_ptr = section.buffer; |
3019eac3 DE |
11219 | |
11220 | if (info_ptr == NULL) | |
33c5cd75 | 11221 | return; |
3019eac3 | 11222 | |
b4f54984 | 11223 | if (dwarf_read_debug) |
19c3d4c9 DE |
11224 | { |
11225 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
96b79293 TT |
11226 | section.get_name (), |
11227 | section.get_file_name ()); | |
19c3d4c9 | 11228 | } |
3019eac3 | 11229 | |
33c5cd75 | 11230 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11231 | while (info_ptr < end_ptr) |
11232 | { | |
11233 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 11234 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
11235 | struct dwo_unit *dwo_unit; |
11236 | void **slot; | |
11237 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 DE |
11238 | |
11239 | memset (&per_cu, 0, sizeof (per_cu)); | |
e3b94546 | 11240 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11241 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11242 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11243 | per_cu.section = §ion; | |
11244 | ||
c0ab21c2 TT |
11245 | cutu_reader reader (&per_cu, cu, &dwo_file); |
11246 | if (!reader.dummy_p) | |
11247 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 11248 | &dwo_file, &read_unit); |
33c5cd75 DB |
11249 | info_ptr += per_cu.length; |
11250 | ||
11251 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 11252 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 11253 | continue; |
3019eac3 | 11254 | |
33c5cd75 | 11255 | if (cus_htab == NULL) |
298e9637 | 11256 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 11257 | |
33c5cd75 | 11258 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
c0ab21c2 | 11259 | *dwo_unit = read_unit; |
b0b6a987 | 11260 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
11261 | gdb_assert (slot != NULL); |
11262 | if (*slot != NULL) | |
19c3d4c9 | 11263 | { |
33c5cd75 DB |
11264 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11265 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11266 | |
b98664d3 | 11267 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11268 | " the entry at offset %s, signature %s"), |
11269 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11270 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11271 | } |
33c5cd75 | 11272 | *slot = (void *)dwo_unit; |
3019eac3 | 11273 | } |
3019eac3 DE |
11274 | } |
11275 | ||
80626a55 DE |
11276 | /* DWP file .debug_{cu,tu}_index section format: |
11277 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11278 | ||
d2415c6c DE |
11279 | DWP Version 1: |
11280 | ||
80626a55 DE |
11281 | Both index sections have the same format, and serve to map a 64-bit |
11282 | signature to a set of section numbers. Each section begins with a header, | |
11283 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11284 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11285 | aligned at 8-byte boundaries in the file. | |
11286 | ||
d2415c6c DE |
11287 | The index section header consists of: |
11288 | ||
11289 | V, 32 bit version number | |
11290 | -, 32 bits unused | |
11291 | N, 32 bit number of compilation units or type units in the index | |
11292 | M, 32 bit number of slots in the hash table | |
80626a55 | 11293 | |
d2415c6c | 11294 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11295 | |
d2415c6c DE |
11296 | The hash table begins at offset 16 in the section, and consists of an array |
11297 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11298 | order of the application binary). Unused slots in the hash table are 0. | |
11299 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11300 | |
d2415c6c DE |
11301 | The parallel table begins immediately after the hash table |
11302 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11303 | array of 32-bit indexes (using the byte order of the application binary), | |
11304 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11305 | table contains a 32-bit index into the pool of section numbers. For unused | |
11306 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11307 | |
73869dc2 DE |
11308 | The pool of section numbers begins immediately following the hash table |
11309 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11310 | section numbers consists of an array of 32-bit words (using the byte order | |
11311 | of the application binary). Each item in the array is indexed starting | |
11312 | from 0. The hash table entry provides the index of the first section | |
11313 | number in the set. Additional section numbers in the set follow, and the | |
11314 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
11315 | ||
11316 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
11317 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
11318 | be the second entry. Other members of the set may follow in any order. | |
11319 | ||
11320 | --- | |
11321 | ||
11322 | DWP Version 2: | |
11323 | ||
11324 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
11325 | and the entries in the index tables are now offsets into these sections. | |
11326 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
11327 | section. | |
11328 | ||
11329 | Index Section Contents: | |
11330 | Header | |
11331 | Hash Table of Signatures dwp_hash_table.hash_table | |
11332 | Parallel Table of Indices dwp_hash_table.unit_table | |
11333 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
11334 | Table of Section Sizes dwp_hash_table.v2.sizes | |
11335 | ||
11336 | The index section header consists of: | |
11337 | ||
11338 | V, 32 bit version number | |
11339 | L, 32 bit number of columns in the table of section offsets | |
11340 | N, 32 bit number of compilation units or type units in the index | |
11341 | M, 32 bit number of slots in the hash table | |
11342 | ||
11343 | Numbers are recorded using the byte order of the application binary. | |
11344 | ||
11345 | The hash table has the same format as version 1. | |
11346 | The parallel table of indices has the same format as version 1, | |
11347 | except that the entries are origin-1 indices into the table of sections | |
11348 | offsets and the table of section sizes. | |
11349 | ||
11350 | The table of offsets begins immediately following the parallel table | |
11351 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11352 | a two-dimensional array of 32-bit words (using the byte order of the | |
11353 | application binary), with L columns and N+1 rows, in row-major order. | |
11354 | Each row in the array is indexed starting from 0. The first row provides | |
11355 | a key to the remaining rows: each column in this row provides an identifier | |
11356 | for a debug section, and the offsets in the same column of subsequent rows | |
11357 | refer to that section. The section identifiers are: | |
11358 | ||
11359 | DW_SECT_INFO 1 .debug_info.dwo | |
11360 | DW_SECT_TYPES 2 .debug_types.dwo | |
11361 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11362 | DW_SECT_LINE 4 .debug_line.dwo | |
11363 | DW_SECT_LOC 5 .debug_loc.dwo | |
11364 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11365 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11366 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11367 | ||
11368 | The offsets provided by the CU and TU index sections are the base offsets | |
11369 | for the contributions made by each CU or TU to the corresponding section | |
11370 | in the package file. Each CU and TU header contains an abbrev_offset | |
11371 | field, used to find the abbreviations table for that CU or TU within the | |
11372 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11373 | be interpreted as relative to the base offset given in the index section. | |
11374 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11375 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11376 | and offsets into other debug sections obtained from DWARF attributes should | |
11377 | also be interpreted as relative to the corresponding base offset. | |
11378 | ||
11379 | The table of sizes begins immediately following the table of offsets. | |
11380 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11381 | with L columns and N rows, in row-major order. Each row in the array is | |
11382 | indexed starting from 1 (row 0 is shared by the two tables). | |
11383 | ||
11384 | --- | |
11385 | ||
11386 | Hash table lookup is handled the same in version 1 and 2: | |
11387 | ||
11388 | We assume that N and M will not exceed 2^32 - 1. | |
11389 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11390 | ||
d2415c6c DE |
11391 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11392 | in the hash table is located as follows: | |
80626a55 | 11393 | |
d2415c6c DE |
11394 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11395 | the low-order k bits all set to 1. | |
80626a55 | 11396 | |
d2415c6c | 11397 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11398 | |
d2415c6c DE |
11399 | 3) If the hash table entry at index H matches the signature, use that |
11400 | entry. If the hash table entry at index H is unused (all zeroes), | |
11401 | terminate the search: the signature is not present in the table. | |
80626a55 | 11402 | |
d2415c6c | 11403 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11404 | |
d2415c6c | 11405 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11406 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11407 | |
11408 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11409 | .debug_{info,types}.dwo in DWP_FILE. | |
11410 | Returns NULL if there isn't one. | |
11411 | Note: This function processes DWP files only, not DWO files. */ | |
11412 | ||
11413 | static struct dwp_hash_table * | |
ed2dc618 SM |
11414 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11415 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
11416 | { |
11417 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 11418 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11419 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11420 | struct dwarf2_section_info *index; |
73869dc2 | 11421 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11422 | struct dwp_hash_table *htab; |
11423 | ||
11424 | if (is_debug_types) | |
11425 | index = &dwp_file->sections.tu_index; | |
11426 | else | |
11427 | index = &dwp_file->sections.cu_index; | |
11428 | ||
96b79293 | 11429 | if (index->empty ()) |
80626a55 | 11430 | return NULL; |
96b79293 | 11431 | index->read (objfile); |
80626a55 DE |
11432 | |
11433 | index_ptr = index->buffer; | |
11434 | index_end = index_ptr + index->size; | |
11435 | ||
11436 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
11437 | index_ptr += 4; |
11438 | if (version == 2) | |
11439 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
11440 | else | |
11441 | nr_columns = 0; | |
11442 | index_ptr += 4; | |
80626a55 DE |
11443 | nr_units = read_4_bytes (dbfd, index_ptr); |
11444 | index_ptr += 4; | |
11445 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11446 | index_ptr += 4; | |
11447 | ||
73869dc2 | 11448 | if (version != 1 && version != 2) |
80626a55 | 11449 | { |
21aa081e | 11450 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11451 | " [in module %s]"), |
21aa081e | 11452 | pulongest (version), dwp_file->name); |
80626a55 DE |
11453 | } |
11454 | if (nr_slots != (nr_slots & -nr_slots)) | |
11455 | { | |
21aa081e | 11456 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11457 | " is not power of 2 [in module %s]"), |
21aa081e | 11458 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11459 | } |
11460 | ||
11461 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
11462 | htab->version = version; |
11463 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11464 | htab->nr_units = nr_units; |
11465 | htab->nr_slots = nr_slots; | |
11466 | htab->hash_table = index_ptr; | |
11467 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11468 | |
11469 | /* Exit early if the table is empty. */ | |
11470 | if (nr_slots == 0 || nr_units == 0 | |
11471 | || (version == 2 && nr_columns == 0)) | |
11472 | { | |
11473 | /* All must be zero. */ | |
11474 | if (nr_slots != 0 || nr_units != 0 | |
11475 | || (version == 2 && nr_columns != 0)) | |
11476 | { | |
b98664d3 | 11477 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11478 | " all zero [in modules %s]"), |
11479 | dwp_file->name); | |
11480 | } | |
11481 | return htab; | |
11482 | } | |
11483 | ||
11484 | if (version == 1) | |
11485 | { | |
11486 | htab->section_pool.v1.indices = | |
11487 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11488 | /* It's harder to decide whether the section is too small in v1. | |
11489 | V1 is deprecated anyway so we punt. */ | |
11490 | } | |
11491 | else | |
11492 | { | |
11493 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11494 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11495 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11496 | /* Reverse map for error checking. */ |
11497 | int ids_seen[DW_SECT_MAX + 1]; | |
11498 | int i; | |
11499 | ||
11500 | if (nr_columns < 2) | |
11501 | { | |
11502 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11503 | " in section table [in module %s]"), | |
11504 | dwp_file->name); | |
11505 | } | |
11506 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11507 | { | |
11508 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11509 | " in section table [in module %s]"), | |
11510 | dwp_file->name); | |
11511 | } | |
04fd5eed GB |
11512 | memset (ids, 255, sizeof_ids); |
11513 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11514 | for (i = 0; i < nr_columns; ++i) |
11515 | { | |
11516 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11517 | ||
11518 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11519 | { | |
11520 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11521 | " in section table [in module %s]"), | |
11522 | id, dwp_file->name); | |
11523 | } | |
11524 | if (ids_seen[id] != -1) | |
11525 | { | |
11526 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11527 | " id %d in section table [in module %s]"), | |
11528 | id, dwp_file->name); | |
11529 | } | |
11530 | ids_seen[id] = i; | |
11531 | ids[i] = id; | |
11532 | } | |
11533 | /* Must have exactly one info or types section. */ | |
11534 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11535 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11536 | != 1) | |
11537 | { | |
11538 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11539 | " DWO info/types section [in module %s]"), | |
11540 | dwp_file->name); | |
11541 | } | |
11542 | /* Must have an abbrev section. */ | |
11543 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11544 | { | |
11545 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11546 | " section [in module %s]"), | |
11547 | dwp_file->name); | |
11548 | } | |
11549 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11550 | htab->section_pool.v2.sizes = | |
11551 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11552 | * nr_units * nr_columns); | |
11553 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11554 | * nr_units * nr_columns)) | |
11555 | > index_end) | |
11556 | { | |
11557 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11558 | " [in module %s]"), | |
11559 | dwp_file->name); | |
11560 | } | |
11561 | } | |
80626a55 DE |
11562 | |
11563 | return htab; | |
11564 | } | |
11565 | ||
11566 | /* Update SECTIONS with the data from SECTP. | |
11567 | ||
11568 | This function is like the other "locate" section routines that are | |
11569 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11570 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11571 | |
11572 | The result is non-zero for success, or zero if an error was found. */ | |
11573 | ||
11574 | static int | |
73869dc2 DE |
11575 | locate_v1_virtual_dwo_sections (asection *sectp, |
11576 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11577 | { |
11578 | const struct dwop_section_names *names = &dwop_section_names; | |
11579 | ||
11580 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11581 | { | |
11582 | /* There can be only one. */ | |
049412e3 | 11583 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11584 | return 0; |
049412e3 | 11585 | sections->abbrev.s.section = sectp; |
fd361982 | 11586 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
11587 | } |
11588 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11589 | || section_is_p (sectp->name, &names->types_dwo)) | |
11590 | { | |
11591 | /* There can be only one. */ | |
049412e3 | 11592 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11593 | return 0; |
049412e3 | 11594 | sections->info_or_types.s.section = sectp; |
fd361982 | 11595 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
11596 | } |
11597 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11598 | { | |
11599 | /* There can be only one. */ | |
049412e3 | 11600 | if (sections->line.s.section != NULL) |
80626a55 | 11601 | return 0; |
049412e3 | 11602 | sections->line.s.section = sectp; |
fd361982 | 11603 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
11604 | } |
11605 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11606 | { | |
11607 | /* There can be only one. */ | |
049412e3 | 11608 | if (sections->loc.s.section != NULL) |
80626a55 | 11609 | return 0; |
049412e3 | 11610 | sections->loc.s.section = sectp; |
fd361982 | 11611 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
11612 | } |
11613 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11614 | { | |
11615 | /* There can be only one. */ | |
049412e3 | 11616 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11617 | return 0; |
049412e3 | 11618 | sections->macinfo.s.section = sectp; |
fd361982 | 11619 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
11620 | } |
11621 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11622 | { | |
11623 | /* There can be only one. */ | |
049412e3 | 11624 | if (sections->macro.s.section != NULL) |
80626a55 | 11625 | return 0; |
049412e3 | 11626 | sections->macro.s.section = sectp; |
fd361982 | 11627 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
11628 | } |
11629 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11630 | { | |
11631 | /* There can be only one. */ | |
049412e3 | 11632 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11633 | return 0; |
049412e3 | 11634 | sections->str_offsets.s.section = sectp; |
fd361982 | 11635 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11636 | } |
11637 | else | |
11638 | { | |
11639 | /* No other kind of section is valid. */ | |
11640 | return 0; | |
11641 | } | |
11642 | ||
11643 | return 1; | |
11644 | } | |
11645 | ||
73869dc2 DE |
11646 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11647 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11648 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11649 | This is for DWP version 1 files. */ | |
80626a55 DE |
11650 | |
11651 | static struct dwo_unit * | |
ed2dc618 SM |
11652 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11653 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11654 | uint32_t unit_index, |
11655 | const char *comp_dir, | |
11656 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11657 | { |
11658 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11659 | const struct dwp_hash_table *dwp_htab = |
11660 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11661 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11662 | const char *kind = is_debug_types ? "TU" : "CU"; |
11663 | struct dwo_file *dwo_file; | |
11664 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11665 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11666 | void **dwo_file_slot; |
80626a55 DE |
11667 | int i; |
11668 | ||
73869dc2 DE |
11669 | gdb_assert (dwp_file->version == 1); |
11670 | ||
b4f54984 | 11671 | if (dwarf_read_debug) |
80626a55 | 11672 | { |
73869dc2 | 11673 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11674 | kind, |
73869dc2 | 11675 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11676 | dwp_file->name); |
11677 | } | |
11678 | ||
19ac8c2e | 11679 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11680 | Put a limit on the number of sections we look for so that bad data |
11681 | doesn't cause us to loop forever. */ | |
11682 | ||
73869dc2 | 11683 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11684 | (1 /* .debug_info or .debug_types */ \ |
11685 | + 1 /* .debug_abbrev */ \ | |
11686 | + 1 /* .debug_line */ \ | |
11687 | + 1 /* .debug_loc */ \ | |
11688 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11689 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11690 | + 1 /* trailing zero */) |
11691 | ||
11692 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11693 | |
73869dc2 | 11694 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11695 | { |
11696 | asection *sectp; | |
11697 | uint32_t section_nr = | |
11698 | read_4_bytes (dbfd, | |
73869dc2 DE |
11699 | dwp_htab->section_pool.v1.indices |
11700 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11701 | |
11702 | if (section_nr == 0) | |
11703 | break; | |
11704 | if (section_nr >= dwp_file->num_sections) | |
11705 | { | |
11706 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11707 | " [in module %s]"), | |
11708 | dwp_file->name); | |
11709 | } | |
11710 | ||
11711 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11712 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11713 | { |
11714 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11715 | " [in module %s]"), | |
11716 | dwp_file->name); | |
11717 | } | |
11718 | } | |
11719 | ||
11720 | if (i < 2 | |
96b79293 TT |
11721 | || sections.info_or_types.empty () |
11722 | || sections.abbrev.empty ()) | |
80626a55 DE |
11723 | { |
11724 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11725 | " [in module %s]"), | |
11726 | dwp_file->name); | |
11727 | } | |
73869dc2 | 11728 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11729 | { |
11730 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11731 | " [in module %s]"), | |
11732 | dwp_file->name); | |
11733 | } | |
11734 | ||
11735 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11736 | have dwo_unit "live" in that. At least for now. | |
11737 | ||
11738 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11739 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11740 | file, we can combine them back into a virtual DWO file to save space |
11741 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11742 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11743 | ||
791afaa2 TT |
11744 | std::string virtual_dwo_name = |
11745 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11746 | sections.abbrev.get_id (), |
11747 | sections.line.get_id (), | |
11748 | sections.loc.get_id (), | |
11749 | sections.str_offsets.get_id ()); | |
80626a55 | 11750 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11751 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11752 | virtual_dwo_name.c_str (), | |
11753 | comp_dir); | |
80626a55 DE |
11754 | /* Create one if necessary. */ |
11755 | if (*dwo_file_slot == NULL) | |
11756 | { | |
b4f54984 | 11757 | if (dwarf_read_debug) |
80626a55 DE |
11758 | { |
11759 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11760 | virtual_dwo_name.c_str ()); |
80626a55 | 11761 | } |
51ac9db5 | 11762 | dwo_file = new struct dwo_file; |
be1e3d3e | 11763 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
0ac5b59e | 11764 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11765 | dwo_file->sections.abbrev = sections.abbrev; |
11766 | dwo_file->sections.line = sections.line; | |
11767 | dwo_file->sections.loc = sections.loc; | |
11768 | dwo_file->sections.macinfo = sections.macinfo; | |
11769 | dwo_file->sections.macro = sections.macro; | |
11770 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11771 | /* The "str" section is global to the entire DWP file. */ | |
11772 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11773 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11774 | there's no need to record it in dwo_file. |
11775 | Also, we can't simply record type sections in dwo_file because | |
11776 | we record a pointer into the vector in dwo_unit. As we collect more | |
11777 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11778 | for it, invalidating all copies of pointers into the previous |
11779 | contents. */ | |
80626a55 DE |
11780 | *dwo_file_slot = dwo_file; |
11781 | } | |
11782 | else | |
11783 | { | |
b4f54984 | 11784 | if (dwarf_read_debug) |
80626a55 DE |
11785 | { |
11786 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11787 | virtual_dwo_name.c_str ()); |
80626a55 | 11788 | } |
9a3c8263 | 11789 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11790 | } |
80626a55 DE |
11791 | |
11792 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11793 | dwo_unit->dwo_file = dwo_file; | |
11794 | dwo_unit->signature = signature; | |
8d749320 SM |
11795 | dwo_unit->section = |
11796 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11797 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11798 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11799 | |
11800 | return dwo_unit; | |
11801 | } | |
11802 | ||
73869dc2 DE |
11803 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11804 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11805 | piece within that section used by a TU/CU, return a virtual section | |
11806 | of just that piece. */ | |
11807 | ||
11808 | static struct dwarf2_section_info | |
ed2dc618 SM |
11809 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11810 | struct dwarf2_section_info *section, | |
73869dc2 DE |
11811 | bfd_size_type offset, bfd_size_type size) |
11812 | { | |
11813 | struct dwarf2_section_info result; | |
11814 | asection *sectp; | |
11815 | ||
11816 | gdb_assert (section != NULL); | |
11817 | gdb_assert (!section->is_virtual); | |
11818 | ||
11819 | memset (&result, 0, sizeof (result)); | |
11820 | result.s.containing_section = section; | |
dc4ccb6f | 11821 | result.is_virtual = true; |
73869dc2 DE |
11822 | |
11823 | if (size == 0) | |
11824 | return result; | |
11825 | ||
96b79293 | 11826 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11827 | |
11828 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11829 | bounds of the real section. This is a pretty-rare event, so just | |
11830 | flag an error (easier) instead of a warning and trying to cope. */ | |
11831 | if (sectp == NULL | |
fd361982 | 11832 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11833 | { |
73869dc2 DE |
11834 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
11835 | " in section %s [in module %s]"), | |
fd361982 | 11836 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
11837 | objfile_name (dwarf2_per_objfile->objfile)); |
11838 | } | |
11839 | ||
11840 | result.virtual_offset = offset; | |
11841 | result.size = size; | |
11842 | return result; | |
11843 | } | |
11844 | ||
11845 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11846 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11847 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11848 | This is for DWP version 2 files. */ | |
11849 | ||
11850 | static struct dwo_unit * | |
ed2dc618 SM |
11851 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11852 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11853 | uint32_t unit_index, |
11854 | const char *comp_dir, | |
11855 | ULONGEST signature, int is_debug_types) | |
11856 | { | |
11857 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11858 | const struct dwp_hash_table *dwp_htab = | |
11859 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11860 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11861 | const char *kind = is_debug_types ? "TU" : "CU"; |
11862 | struct dwo_file *dwo_file; | |
11863 | struct dwo_unit *dwo_unit; | |
11864 | struct virtual_v2_dwo_sections sections; | |
11865 | void **dwo_file_slot; | |
73869dc2 DE |
11866 | int i; |
11867 | ||
11868 | gdb_assert (dwp_file->version == 2); | |
11869 | ||
b4f54984 | 11870 | if (dwarf_read_debug) |
73869dc2 DE |
11871 | { |
11872 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11873 | kind, | |
11874 | pulongest (unit_index), hex_string (signature), | |
11875 | dwp_file->name); | |
11876 | } | |
11877 | ||
11878 | /* Fetch the section offsets of this DWO unit. */ | |
11879 | ||
11880 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11881 | |
11882 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11883 | { | |
11884 | uint32_t offset = read_4_bytes (dbfd, | |
11885 | dwp_htab->section_pool.v2.offsets | |
11886 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11887 | + i) | |
11888 | * sizeof (uint32_t))); | |
11889 | uint32_t size = read_4_bytes (dbfd, | |
11890 | dwp_htab->section_pool.v2.sizes | |
11891 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11892 | + i) | |
11893 | * sizeof (uint32_t))); | |
11894 | ||
11895 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11896 | { | |
11897 | case DW_SECT_INFO: | |
11898 | case DW_SECT_TYPES: | |
11899 | sections.info_or_types_offset = offset; | |
11900 | sections.info_or_types_size = size; | |
11901 | break; | |
11902 | case DW_SECT_ABBREV: | |
11903 | sections.abbrev_offset = offset; | |
11904 | sections.abbrev_size = size; | |
11905 | break; | |
11906 | case DW_SECT_LINE: | |
11907 | sections.line_offset = offset; | |
11908 | sections.line_size = size; | |
11909 | break; | |
11910 | case DW_SECT_LOC: | |
11911 | sections.loc_offset = offset; | |
11912 | sections.loc_size = size; | |
11913 | break; | |
11914 | case DW_SECT_STR_OFFSETS: | |
11915 | sections.str_offsets_offset = offset; | |
11916 | sections.str_offsets_size = size; | |
11917 | break; | |
11918 | case DW_SECT_MACINFO: | |
11919 | sections.macinfo_offset = offset; | |
11920 | sections.macinfo_size = size; | |
11921 | break; | |
11922 | case DW_SECT_MACRO: | |
11923 | sections.macro_offset = offset; | |
11924 | sections.macro_size = size; | |
11925 | break; | |
11926 | } | |
11927 | } | |
11928 | ||
11929 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11930 | have dwo_unit "live" in that. At least for now. | |
11931 | ||
11932 | The DWP file can be made up of a random collection of CUs and TUs. | |
11933 | However, for each CU + set of TUs that came from the same original DWO | |
11934 | file, we can combine them back into a virtual DWO file to save space | |
11935 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11936 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11937 | ||
791afaa2 TT |
11938 | std::string virtual_dwo_name = |
11939 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11940 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11941 | (long) (sections.line_size ? sections.line_offset : 0), | |
11942 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11943 | (long) (sections.str_offsets_size | |
11944 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11945 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11946 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11947 | virtual_dwo_name.c_str (), | |
11948 | comp_dir); | |
73869dc2 DE |
11949 | /* Create one if necessary. */ |
11950 | if (*dwo_file_slot == NULL) | |
11951 | { | |
b4f54984 | 11952 | if (dwarf_read_debug) |
73869dc2 DE |
11953 | { |
11954 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11955 | virtual_dwo_name.c_str ()); |
73869dc2 | 11956 | } |
51ac9db5 | 11957 | dwo_file = new struct dwo_file; |
be1e3d3e | 11958 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
73869dc2 DE |
11959 | dwo_file->comp_dir = comp_dir; |
11960 | dwo_file->sections.abbrev = | |
ed2dc618 | 11961 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
11962 | sections.abbrev_offset, sections.abbrev_size); |
11963 | dwo_file->sections.line = | |
ed2dc618 | 11964 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
11965 | sections.line_offset, sections.line_size); |
11966 | dwo_file->sections.loc = | |
ed2dc618 | 11967 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
11968 | sections.loc_offset, sections.loc_size); |
11969 | dwo_file->sections.macinfo = | |
ed2dc618 | 11970 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
11971 | sections.macinfo_offset, sections.macinfo_size); |
11972 | dwo_file->sections.macro = | |
ed2dc618 | 11973 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
11974 | sections.macro_offset, sections.macro_size); |
11975 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
11976 | create_dwp_v2_section (dwarf2_per_objfile, |
11977 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
11978 | sections.str_offsets_offset, |
11979 | sections.str_offsets_size); | |
11980 | /* The "str" section is global to the entire DWP file. */ | |
11981 | dwo_file->sections.str = dwp_file->sections.str; | |
11982 | /* The info or types section is assigned below to dwo_unit, | |
11983 | there's no need to record it in dwo_file. | |
11984 | Also, we can't simply record type sections in dwo_file because | |
11985 | we record a pointer into the vector in dwo_unit. As we collect more | |
11986 | types we'll grow the vector and eventually have to reallocate space | |
11987 | for it, invalidating all copies of pointers into the previous | |
11988 | contents. */ | |
11989 | *dwo_file_slot = dwo_file; | |
11990 | } | |
11991 | else | |
11992 | { | |
b4f54984 | 11993 | if (dwarf_read_debug) |
73869dc2 DE |
11994 | { |
11995 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11996 | virtual_dwo_name.c_str ()); |
73869dc2 | 11997 | } |
9a3c8263 | 11998 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11999 | } |
73869dc2 DE |
12000 | |
12001 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12002 | dwo_unit->dwo_file = dwo_file; | |
12003 | dwo_unit->signature = signature; | |
8d749320 SM |
12004 | dwo_unit->section = |
12005 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
12006 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
12007 | is_debug_types | |
73869dc2 DE |
12008 | ? &dwp_file->sections.types |
12009 | : &dwp_file->sections.info, | |
12010 | sections.info_or_types_offset, | |
12011 | sections.info_or_types_size); | |
12012 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12013 | ||
12014 | return dwo_unit; | |
12015 | } | |
12016 | ||
57d63ce2 DE |
12017 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12018 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12019 | |
12020 | static struct dwo_unit * | |
ed2dc618 SM |
12021 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12022 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 12023 | ULONGEST signature, int is_debug_types) |
80626a55 | 12024 | { |
57d63ce2 DE |
12025 | const struct dwp_hash_table *dwp_htab = |
12026 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12027 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 12028 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12029 | uint32_t hash = signature & mask; |
12030 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12031 | unsigned int i; | |
12032 | void **slot; | |
870f88f7 | 12033 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12034 | |
12035 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12036 | find_dwo_cu.signature = signature; | |
19ac8c2e | 12037 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
12038 | ? dwp_file->loaded_tus.get () |
12039 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 12040 | &find_dwo_cu, INSERT); |
80626a55 DE |
12041 | |
12042 | if (*slot != NULL) | |
9a3c8263 | 12043 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12044 | |
12045 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12046 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12047 | { |
12048 | ULONGEST signature_in_table; | |
12049 | ||
12050 | signature_in_table = | |
57d63ce2 | 12051 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12052 | if (signature_in_table == signature) |
12053 | { | |
57d63ce2 DE |
12054 | uint32_t unit_index = |
12055 | read_4_bytes (dbfd, | |
12056 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12057 | |
73869dc2 DE |
12058 | if (dwp_file->version == 1) |
12059 | { | |
ed2dc618 SM |
12060 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
12061 | dwp_file, unit_index, | |
73869dc2 DE |
12062 | comp_dir, signature, |
12063 | is_debug_types); | |
12064 | } | |
12065 | else | |
12066 | { | |
ed2dc618 SM |
12067 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
12068 | dwp_file, unit_index, | |
73869dc2 DE |
12069 | comp_dir, signature, |
12070 | is_debug_types); | |
12071 | } | |
9a3c8263 | 12072 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12073 | } |
12074 | if (signature_in_table == 0) | |
12075 | return NULL; | |
12076 | hash = (hash + hash2) & mask; | |
12077 | } | |
12078 | ||
12079 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12080 | " [in module %s]"), | |
12081 | dwp_file->name); | |
12082 | } | |
12083 | ||
ab5088bf | 12084 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12085 | Open the file specified by FILE_NAME and hand it off to BFD for |
12086 | preliminary analysis. Return a newly initialized bfd *, which | |
12087 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12088 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12089 | SEARCH_CWD is true if the current directory is to be searched. |
12090 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12091 | If successful, the file is added to the bfd include table of the |
12092 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12093 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12094 | NOTE: This function is derived from symfile_bfd_open. */ |
12095 | ||
192b62ce | 12096 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12097 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12098 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12099 | { |
24b9144d | 12100 | int desc; |
9c02c129 DE |
12101 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12102 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12103 | to debug_file_directory. */ | |
e0cc99a6 | 12104 | const char *search_path; |
9c02c129 DE |
12105 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12106 | ||
e0cc99a6 | 12107 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12108 | if (search_cwd) |
12109 | { | |
12110 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12111 | { |
12112 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12113 | debug_file_directory, | |
12114 | (char *) NULL)); | |
12115 | search_path = search_path_holder.get (); | |
12116 | } | |
6ac97d4c | 12117 | else |
e0cc99a6 | 12118 | search_path = "."; |
6ac97d4c | 12119 | } |
9c02c129 | 12120 | else |
e0cc99a6 | 12121 | search_path = debug_file_directory; |
3019eac3 | 12122 | |
24b9144d | 12123 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12124 | if (is_dwp) |
12125 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12126 | |
12127 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12128 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12129 | O_RDONLY | O_BINARY, &absolute_name); |
12130 | if (desc < 0) | |
12131 | return NULL; | |
12132 | ||
e0cc99a6 TT |
12133 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12134 | gnutarget, desc)); | |
9c02c129 DE |
12135 | if (sym_bfd == NULL) |
12136 | return NULL; | |
192b62ce | 12137 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12138 | |
192b62ce TT |
12139 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12140 | return NULL; | |
3019eac3 | 12141 | |
13aaf454 DE |
12142 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12143 | This is important because things like demangled_names_hash lives in the | |
12144 | objfile's per_bfd space and may have references to things like symbol | |
12145 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12146 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12147 | |
3019eac3 DE |
12148 | return sym_bfd; |
12149 | } | |
12150 | ||
ab5088bf | 12151 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12152 | COMP_DIR is the DW_AT_comp_dir attribute. |
12153 | The result is the bfd handle of the file. | |
12154 | If there is a problem finding or opening the file, return NULL. | |
12155 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12156 | same as symfile_bfd_open. */ | |
12157 | ||
192b62ce | 12158 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12159 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12160 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12161 | { |
80626a55 | 12162 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12163 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12164 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12165 | |
12166 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12167 | ||
12168 | if (comp_dir != NULL) | |
12169 | { | |
43816ebc TT |
12170 | gdb::unique_xmalloc_ptr<char> path_to_try |
12171 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12172 | |
12173 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12174 | search path, which seems useful. */ | |
ed2dc618 | 12175 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
43816ebc | 12176 | path_to_try.get (), |
ed2dc618 | 12177 | 0 /*is_dwp*/, |
192b62ce | 12178 | 1 /*search_cwd*/)); |
3019eac3 DE |
12179 | if (abfd != NULL) |
12180 | return abfd; | |
12181 | } | |
12182 | ||
12183 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12184 | is a list of paths. */ | |
12185 | ||
12186 | if (*debug_file_directory == '\0') | |
12187 | return NULL; | |
12188 | ||
ed2dc618 SM |
12189 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12190 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12191 | } |
12192 | ||
80626a55 DE |
12193 | /* This function is mapped across the sections and remembers the offset and |
12194 | size of each of the DWO debugging sections we are interested in. */ | |
12195 | ||
12196 | static void | |
12197 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12198 | { | |
9a3c8263 | 12199 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12200 | const struct dwop_section_names *names = &dwop_section_names; |
12201 | ||
12202 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12203 | { | |
049412e3 | 12204 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12205 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12206 | } |
12207 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12208 | { | |
049412e3 | 12209 | dwo_sections->info.s.section = sectp; |
fd361982 | 12210 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12211 | } |
12212 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12213 | { | |
049412e3 | 12214 | dwo_sections->line.s.section = sectp; |
fd361982 | 12215 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12216 | } |
12217 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12218 | { | |
049412e3 | 12219 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12220 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 | 12221 | } |
41144253 | 12222 | else if (section_is_p (sectp->name, &names->loclists_dwo)) |
12223 | { | |
12224 | dwo_sections->loclists.s.section = sectp; | |
12225 | dwo_sections->loclists.size = bfd_section_size (sectp); | |
12226 | } | |
80626a55 DE |
12227 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
12228 | { | |
049412e3 | 12229 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12230 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12231 | } |
12232 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12233 | { | |
049412e3 | 12234 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12235 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12236 | } |
12237 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12238 | { | |
049412e3 | 12239 | dwo_sections->str.s.section = sectp; |
fd361982 | 12240 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
12241 | } |
12242 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12243 | { | |
049412e3 | 12244 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12245 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12246 | } |
12247 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12248 | { | |
12249 | struct dwarf2_section_info type_section; | |
12250 | ||
12251 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12252 | type_section.s.section = sectp; |
fd361982 | 12253 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12254 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12255 | } |
12256 | } | |
12257 | ||
ab5088bf | 12258 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12259 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12260 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12261 | |
12262 | static struct dwo_file * | |
0ac5b59e DE |
12263 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12264 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12265 | { |
ed2dc618 | 12266 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12267 | |
fb1eb2f9 | 12268 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12269 | if (dbfd == NULL) |
12270 | { | |
b4f54984 | 12271 | if (dwarf_read_debug) |
80626a55 DE |
12272 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12273 | return NULL; | |
12274 | } | |
263db9a1 | 12275 | |
51ac9db5 | 12276 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12277 | dwo_file->dwo_name = dwo_name; |
12278 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12279 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12280 | |
fb1eb2f9 | 12281 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 12282 | &dwo_file->sections); |
3019eac3 | 12283 | |
18a8505e AT |
12284 | create_cus_hash_table (dwarf2_per_objfile, per_cu->cu, *dwo_file, |
12285 | dwo_file->sections.info, dwo_file->cus); | |
3019eac3 | 12286 | |
263db9a1 | 12287 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12288 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12289 | |
b4f54984 | 12290 | if (dwarf_read_debug) |
80626a55 DE |
12291 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12292 | ||
263db9a1 | 12293 | return dwo_file.release (); |
3019eac3 DE |
12294 | } |
12295 | ||
80626a55 | 12296 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12297 | size of each of the DWP debugging sections common to version 1 and 2 that |
12298 | we are interested in. */ | |
3019eac3 | 12299 | |
80626a55 | 12300 | static void |
73869dc2 DE |
12301 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12302 | void *dwp_file_ptr) | |
3019eac3 | 12303 | { |
9a3c8263 | 12304 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12305 | const struct dwop_section_names *names = &dwop_section_names; |
12306 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12307 | |
80626a55 | 12308 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12309 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12310 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12311 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12312 | |
80626a55 DE |
12313 | /* Look for specific sections that we need. */ |
12314 | if (section_is_p (sectp->name, &names->str_dwo)) | |
12315 | { | |
049412e3 | 12316 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12317 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
12318 | } |
12319 | else if (section_is_p (sectp->name, &names->cu_index)) | |
12320 | { | |
049412e3 | 12321 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12322 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12323 | } |
12324 | else if (section_is_p (sectp->name, &names->tu_index)) | |
12325 | { | |
049412e3 | 12326 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12327 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12328 | } |
12329 | } | |
3019eac3 | 12330 | |
73869dc2 DE |
12331 | /* This function is mapped across the sections and remembers the offset and |
12332 | size of each of the DWP version 2 debugging sections that we are interested | |
12333 | in. This is split into a separate function because we don't know if we | |
12334 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
12335 | ||
12336 | static void | |
12337 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12338 | { | |
9a3c8263 | 12339 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12340 | const struct dwop_section_names *names = &dwop_section_names; |
12341 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12342 | ||
12343 | /* Record the ELF section number for later lookup: this is what the | |
12344 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12345 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12346 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12347 | ||
12348 | /* Look for specific sections that we need. */ | |
12349 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12350 | { | |
049412e3 | 12351 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12352 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
12353 | } |
12354 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12355 | { | |
049412e3 | 12356 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12357 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
12358 | } |
12359 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12360 | { | |
049412e3 | 12361 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12362 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
12363 | } |
12364 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12365 | { | |
049412e3 | 12366 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12367 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
12368 | } |
12369 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12370 | { | |
049412e3 | 12371 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12372 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
12373 | } |
12374 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12375 | { | |
049412e3 | 12376 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12377 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
12378 | } |
12379 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12380 | { | |
049412e3 | 12381 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12382 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
12383 | } |
12384 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12385 | { | |
049412e3 | 12386 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12387 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12388 | } |
12389 | } | |
12390 | ||
80626a55 | 12391 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12392 | |
80626a55 DE |
12393 | static hashval_t |
12394 | hash_dwp_loaded_cutus (const void *item) | |
12395 | { | |
9a3c8263 | 12396 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12397 | |
80626a55 DE |
12398 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12399 | return dwo_unit->signature; | |
3019eac3 DE |
12400 | } |
12401 | ||
80626a55 | 12402 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12403 | |
80626a55 DE |
12404 | static int |
12405 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12406 | { |
9a3c8263 SM |
12407 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12408 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12409 | |
80626a55 DE |
12410 | return dua->signature == dub->signature; |
12411 | } | |
3019eac3 | 12412 | |
80626a55 | 12413 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12414 | |
48b490f2 | 12415 | static htab_up |
298e9637 | 12416 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12417 | { |
48b490f2 TT |
12418 | return htab_up (htab_create_alloc (3, |
12419 | hash_dwp_loaded_cutus, | |
12420 | eq_dwp_loaded_cutus, | |
12421 | NULL, xcalloc, xfree)); | |
80626a55 | 12422 | } |
3019eac3 | 12423 | |
ab5088bf DE |
12424 | /* Try to open DWP file FILE_NAME. |
12425 | The result is the bfd handle of the file. | |
12426 | If there is a problem finding or opening the file, return NULL. | |
12427 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12428 | same as symfile_bfd_open. */ | |
12429 | ||
192b62ce | 12430 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12431 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12432 | const char *file_name) | |
ab5088bf | 12433 | { |
ed2dc618 SM |
12434 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
12435 | 1 /*is_dwp*/, | |
192b62ce | 12436 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12437 | if (abfd != NULL) |
12438 | return abfd; | |
12439 | ||
12440 | /* Work around upstream bug 15652. | |
12441 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12442 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12443 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12444 | of the executable's path may have discarded the needed info. | |
12445 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12446 | .gnu_debuglink, but that doesn't exist yet.] | |
12447 | Strip the directory from FILE_NAME and search again. */ | |
12448 | if (*debug_file_directory != '\0') | |
12449 | { | |
12450 | /* Don't implicitly search the current directory here. | |
12451 | If the user wants to search "." to handle this case, | |
12452 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
12453 | return try_open_dwop_file (dwarf2_per_objfile, |
12454 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
12455 | 0 /*search_cwd*/); |
12456 | } | |
12457 | ||
12458 | return NULL; | |
ab5088bf DE |
12459 | } |
12460 | ||
80626a55 DE |
12461 | /* Initialize the use of the DWP file for the current objfile. |
12462 | By convention the name of the DWP file is ${objfile}.dwp. | |
12463 | The result is NULL if it can't be found. */ | |
a766d390 | 12464 | |
400174b1 | 12465 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 12466 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
12467 | { |
12468 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 12469 | |
82bf32bc JK |
12470 | /* Try to find first .dwp for the binary file before any symbolic links |
12471 | resolving. */ | |
6c447423 DE |
12472 | |
12473 | /* If the objfile is a debug file, find the name of the real binary | |
12474 | file and get the name of dwp file from there. */ | |
d721ba37 | 12475 | std::string dwp_name; |
6c447423 DE |
12476 | if (objfile->separate_debug_objfile_backlink != NULL) |
12477 | { | |
12478 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12479 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12480 | |
d721ba37 | 12481 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12482 | } |
12483 | else | |
d721ba37 PA |
12484 | dwp_name = objfile->original_name; |
12485 | ||
12486 | dwp_name += ".dwp"; | |
80626a55 | 12487 | |
ed2dc618 | 12488 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12489 | if (dbfd == NULL |
12490 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12491 | { | |
12492 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12493 | dwp_name = objfile_name (objfile); |
12494 | dwp_name += ".dwp"; | |
ed2dc618 | 12495 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12496 | } |
12497 | ||
80626a55 DE |
12498 | if (dbfd == NULL) |
12499 | { | |
b4f54984 | 12500 | if (dwarf_read_debug) |
d721ba37 | 12501 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 12502 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12503 | } |
400174b1 TT |
12504 | |
12505 | const char *name = bfd_get_filename (dbfd.get ()); | |
12506 | std::unique_ptr<struct dwp_file> dwp_file | |
12507 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12508 | |
0a0f4c01 | 12509 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
12510 | dwp_file->elf_sections = |
12511 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12512 | dwp_file->num_sections, asection *); | |
12513 | ||
400174b1 TT |
12514 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12515 | dwarf2_locate_common_dwp_sections, | |
12516 | dwp_file.get ()); | |
80626a55 | 12517 | |
400174b1 TT |
12518 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12519 | 0); | |
80626a55 | 12520 | |
400174b1 TT |
12521 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12522 | 1); | |
80626a55 | 12523 | |
73869dc2 | 12524 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12525 | if (dwp_file->cus && dwp_file->tus |
12526 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12527 | { |
12528 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12529 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12530 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12531 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12532 | " TU version %s [in DWP file %s]"), | |
12533 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12534 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12535 | } |
08302ed2 DE |
12536 | |
12537 | if (dwp_file->cus) | |
12538 | dwp_file->version = dwp_file->cus->version; | |
12539 | else if (dwp_file->tus) | |
12540 | dwp_file->version = dwp_file->tus->version; | |
12541 | else | |
12542 | dwp_file->version = 2; | |
73869dc2 DE |
12543 | |
12544 | if (dwp_file->version == 2) | |
400174b1 TT |
12545 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12546 | dwarf2_locate_v2_dwp_sections, | |
12547 | dwp_file.get ()); | |
73869dc2 | 12548 | |
298e9637 SM |
12549 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12550 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12551 | |
b4f54984 | 12552 | if (dwarf_read_debug) |
80626a55 DE |
12553 | { |
12554 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12555 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12556 | " %s CUs, %s TUs\n", |
12557 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12558 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12559 | } |
12560 | ||
12561 | return dwp_file; | |
3019eac3 | 12562 | } |
c906108c | 12563 | |
ab5088bf DE |
12564 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12565 | ||
12566 | static struct dwp_file * | |
ed2dc618 | 12567 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
12568 | { |
12569 | if (! dwarf2_per_objfile->dwp_checked) | |
12570 | { | |
ed2dc618 SM |
12571 | dwarf2_per_objfile->dwp_file |
12572 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
12573 | dwarf2_per_objfile->dwp_checked = 1; |
12574 | } | |
400174b1 | 12575 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
12576 | } |
12577 | ||
80626a55 DE |
12578 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12579 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12580 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12581 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12582 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12583 | ||
12584 | This is called, for example, when wanting to read a variable with a | |
12585 | complex location. Therefore we don't want to do file i/o for every call. | |
12586 | Therefore we don't want to look for a DWO file on every call. | |
12587 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12588 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12589 | for a DWO file. | |
12590 | ||
1c658ad5 | 12591 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12592 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12593 | |
3019eac3 | 12594 | static struct dwo_unit * |
80626a55 DE |
12595 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12596 | const char *dwo_name, const char *comp_dir, | |
12597 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 12598 | { |
ed2dc618 | 12599 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 12600 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
12601 | const char *kind = is_debug_types ? "TU" : "CU"; |
12602 | void **dwo_file_slot; | |
3019eac3 | 12603 | struct dwo_file *dwo_file; |
80626a55 | 12604 | struct dwp_file *dwp_file; |
cb1df416 | 12605 | |
6a506a2d DE |
12606 | /* First see if there's a DWP file. |
12607 | If we have a DWP file but didn't find the DWO inside it, don't | |
12608 | look for the original DWO file. It makes gdb behave differently | |
12609 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12610 | |
ed2dc618 | 12611 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 12612 | if (dwp_file != NULL) |
cf2c3c16 | 12613 | { |
80626a55 DE |
12614 | const struct dwp_hash_table *dwp_htab = |
12615 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12616 | ||
12617 | if (dwp_htab != NULL) | |
12618 | { | |
12619 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 12620 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 12621 | signature, is_debug_types); |
80626a55 DE |
12622 | |
12623 | if (dwo_cutu != NULL) | |
12624 | { | |
b4f54984 | 12625 | if (dwarf_read_debug) |
80626a55 DE |
12626 | { |
12627 | fprintf_unfiltered (gdb_stdlog, | |
12628 | "Virtual DWO %s %s found: @%s\n", | |
12629 | kind, hex_string (signature), | |
12630 | host_address_to_string (dwo_cutu)); | |
12631 | } | |
12632 | return dwo_cutu; | |
12633 | } | |
12634 | } | |
12635 | } | |
6a506a2d | 12636 | else |
80626a55 | 12637 | { |
6a506a2d | 12638 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12639 | |
ed2dc618 SM |
12640 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12641 | dwo_name, comp_dir); | |
6a506a2d | 12642 | if (*dwo_file_slot == NULL) |
80626a55 | 12643 | { |
6a506a2d DE |
12644 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12645 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12646 | } |
6a506a2d | 12647 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12648 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12649 | |
6a506a2d | 12650 | if (dwo_file != NULL) |
19c3d4c9 | 12651 | { |
6a506a2d DE |
12652 | struct dwo_unit *dwo_cutu = NULL; |
12653 | ||
12654 | if (is_debug_types && dwo_file->tus) | |
12655 | { | |
12656 | struct dwo_unit find_dwo_cutu; | |
12657 | ||
12658 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12659 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12660 | dwo_cutu |
b0b6a987 TT |
12661 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12662 | &find_dwo_cutu); | |
6a506a2d | 12663 | } |
33c5cd75 | 12664 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12665 | { |
33c5cd75 DB |
12666 | struct dwo_unit find_dwo_cutu; |
12667 | ||
12668 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12669 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12670 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12671 | &find_dwo_cutu); |
6a506a2d DE |
12672 | } |
12673 | ||
12674 | if (dwo_cutu != NULL) | |
12675 | { | |
b4f54984 | 12676 | if (dwarf_read_debug) |
6a506a2d DE |
12677 | { |
12678 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12679 | kind, dwo_name, hex_string (signature), | |
12680 | host_address_to_string (dwo_cutu)); | |
12681 | } | |
12682 | return dwo_cutu; | |
80626a55 DE |
12683 | } |
12684 | } | |
2e276125 | 12685 | } |
9cdd5dbd | 12686 | |
80626a55 DE |
12687 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12688 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12689 | correctly to find the file. */ | |
12690 | ||
b4f54984 | 12691 | if (dwarf_read_debug) |
80626a55 DE |
12692 | { |
12693 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12694 | kind, dwo_name, hex_string (signature)); | |
12695 | } | |
3019eac3 | 12696 | |
6656a72d DE |
12697 | /* This is a warning and not a complaint because it can be caused by |
12698 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12699 | { |
12700 | /* Print the name of the DWP file if we looked there, helps the user | |
12701 | better diagnose the problem. */ | |
791afaa2 | 12702 | std::string dwp_text; |
43942612 DE |
12703 | |
12704 | if (dwp_file != NULL) | |
791afaa2 TT |
12705 | dwp_text = string_printf (" [in DWP file %s]", |
12706 | lbasename (dwp_file->name)); | |
43942612 | 12707 | |
9d8780f0 | 12708 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
12709 | " [in module %s]"), |
12710 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12711 | dwp_text.c_str (), |
43942612 | 12712 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 12713 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12714 | } |
3019eac3 | 12715 | return NULL; |
5fb290d7 DJ |
12716 | } |
12717 | ||
80626a55 DE |
12718 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12719 | See lookup_dwo_cutu_unit for details. */ | |
12720 | ||
12721 | static struct dwo_unit * | |
12722 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12723 | const char *dwo_name, const char *comp_dir, | |
12724 | ULONGEST signature) | |
12725 | { | |
12726 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12727 | } | |
12728 | ||
12729 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12730 | See lookup_dwo_cutu_unit for details. */ | |
12731 | ||
12732 | static struct dwo_unit * | |
12733 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12734 | const char *dwo_name, const char *comp_dir) | |
12735 | { | |
12736 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12737 | } | |
12738 | ||
89e63ee4 DE |
12739 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12740 | ||
12741 | static int | |
12742 | queue_and_load_dwo_tu (void **slot, void *info) | |
12743 | { | |
12744 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12745 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12746 | ULONGEST signature = dwo_unit->signature; | |
12747 | struct signatured_type *sig_type = | |
12748 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12749 | ||
12750 | if (sig_type != NULL) | |
12751 | { | |
12752 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12753 | ||
12754 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12755 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12756 | while processing PER_CU. */ | |
12757 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12758 | load_full_type_unit (sig_cu); | |
ae640021 | 12759 | per_cu->imported_symtabs_push (sig_cu); |
89e63ee4 DE |
12760 | } |
12761 | ||
12762 | return 1; | |
12763 | } | |
12764 | ||
12765 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12766 | The DWO may have the only definition of the type, though it may not be | |
12767 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12768 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12769 | ||
12770 | static void | |
12771 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12772 | { | |
12773 | struct dwo_unit *dwo_unit; | |
12774 | struct dwo_file *dwo_file; | |
12775 | ||
12776 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 12777 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
12778 | gdb_assert (per_cu->cu != NULL); |
12779 | ||
12780 | dwo_unit = per_cu->cu->dwo_unit; | |
12781 | gdb_assert (dwo_unit != NULL); | |
12782 | ||
12783 | dwo_file = dwo_unit->dwo_file; | |
12784 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
12785 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, |
12786 | per_cu); | |
89e63ee4 DE |
12787 | } |
12788 | ||
3019eac3 | 12789 | /* Read in various DIEs. */ |
348e048f | 12790 | |
d389af10 | 12791 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12792 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12793 | already referenced by DW_AT_abstract_origin from the children of the | |
12794 | current DIE. */ | |
d389af10 JK |
12795 | |
12796 | static void | |
12797 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12798 | { | |
12799 | struct die_info *child_die; | |
791afaa2 | 12800 | sect_offset *offsetp; |
d389af10 JK |
12801 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12802 | struct die_info *origin_die; | |
12803 | /* Iterator of the ORIGIN_DIE children. */ | |
12804 | struct die_info *origin_child_die; | |
d389af10 | 12805 | struct attribute *attr; |
cd02d79d PA |
12806 | struct dwarf2_cu *origin_cu; |
12807 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12808 | |
12809 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12810 | if (!attr) | |
12811 | return; | |
12812 | ||
cd02d79d PA |
12813 | /* Note that following die references may follow to a die in a |
12814 | different cu. */ | |
12815 | ||
12816 | origin_cu = cu; | |
12817 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12818 | ||
12819 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12820 | symbols in. */ | |
12821 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12822 | origin_cu->list_in_scope = cu->list_in_scope; | |
12823 | ||
edb3359d DJ |
12824 | if (die->tag != origin_die->tag |
12825 | && !(die->tag == DW_TAG_inlined_subroutine | |
12826 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12827 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12828 | sect_offset_str (die->sect_off), |
12829 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12830 | |
791afaa2 | 12831 | std::vector<sect_offset> offsets; |
d389af10 | 12832 | |
3ea89b92 PMR |
12833 | for (child_die = die->child; |
12834 | child_die && child_die->tag; | |
436c571c | 12835 | child_die = child_die->sibling) |
3ea89b92 PMR |
12836 | { |
12837 | struct die_info *child_origin_die; | |
12838 | struct dwarf2_cu *child_origin_cu; | |
12839 | ||
12840 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12841 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12842 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12843 | present in the abstract instance but not referenced in the concrete | |
12844 | one. */ | |
216f72a1 JK |
12845 | if (child_die->tag == DW_TAG_call_site |
12846 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12847 | continue; |
12848 | ||
c38f313d DJ |
12849 | /* For each CHILD_DIE, find the corresponding child of |
12850 | ORIGIN_DIE. If there is more than one layer of | |
12851 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12852 | but GCC versions at least through 4.4 generate this (GCC PR | |
12853 | 40573). */ | |
3ea89b92 PMR |
12854 | child_origin_die = child_die; |
12855 | child_origin_cu = cu; | |
c38f313d DJ |
12856 | while (1) |
12857 | { | |
cd02d79d PA |
12858 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12859 | child_origin_cu); | |
c38f313d DJ |
12860 | if (attr == NULL) |
12861 | break; | |
cd02d79d PA |
12862 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12863 | &child_origin_cu); | |
c38f313d DJ |
12864 | } |
12865 | ||
d389af10 JK |
12866 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12867 | counterpart may exist. */ | |
c38f313d | 12868 | if (child_origin_die != child_die) |
d389af10 | 12869 | { |
edb3359d DJ |
12870 | if (child_die->tag != child_origin_die->tag |
12871 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12872 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12873 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12874 | "different tags"), |
9d8780f0 SM |
12875 | sect_offset_str (child_die->sect_off), |
12876 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12877 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12878 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12879 | "different parents"), |
9d8780f0 SM |
12880 | sect_offset_str (child_die->sect_off), |
12881 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12882 | else |
791afaa2 | 12883 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12884 | } |
d389af10 | 12885 | } |
791afaa2 TT |
12886 | std::sort (offsets.begin (), offsets.end ()); |
12887 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12888 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12889 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12890 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12891 | "to DIE %s as their abstract origin"), |
12892 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12893 | |
791afaa2 | 12894 | offsetp = offsets.data (); |
d389af10 JK |
12895 | origin_child_die = origin_die->child; |
12896 | while (origin_child_die && origin_child_die->tag) | |
12897 | { | |
12898 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12899 | while (offsetp < offsets_end |
9c541725 | 12900 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12901 | offsetp++; |
b64f50a1 | 12902 | if (offsetp >= offsets_end |
9c541725 | 12903 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12904 | { |
adde2bff DE |
12905 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12906 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12907 | This can happen with mutually referenced abstract_origins. | |
12908 | PR 16581. */ | |
12909 | if (!origin_child_die->in_process) | |
12910 | process_die (origin_child_die, origin_cu); | |
d389af10 | 12911 | } |
436c571c | 12912 | origin_child_die = origin_child_die->sibling; |
d389af10 | 12913 | } |
cd02d79d | 12914 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12915 | |
12916 | if (cu != origin_cu) | |
12917 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12918 | } |
12919 | ||
c906108c | 12920 | static void |
e7c27a73 | 12921 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12922 | { |
518817b3 | 12923 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 12924 | struct gdbarch *gdbarch = objfile->arch (); |
fe978cb0 | 12925 | struct context_stack *newobj; |
c906108c SS |
12926 | CORE_ADDR lowpc; |
12927 | CORE_ADDR highpc; | |
12928 | struct die_info *child_die; | |
edb3359d | 12929 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12930 | const char *name; |
e142c38c | 12931 | CORE_ADDR baseaddr; |
801e3a5b | 12932 | struct block *block; |
edb3359d | 12933 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12934 | std::vector<struct symbol *> template_args; |
34eaf542 | 12935 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12936 | |
12937 | if (inlined_func) | |
12938 | { | |
12939 | /* If we do not have call site information, we can't show the | |
12940 | caller of this inlined function. That's too confusing, so | |
12941 | only use the scope for local variables. */ | |
12942 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12943 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12944 | if (call_line == NULL || call_file == NULL) | |
12945 | { | |
12946 | read_lexical_block_scope (die, cu); | |
12947 | return; | |
12948 | } | |
12949 | } | |
c906108c | 12950 | |
b3b3bada | 12951 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12952 | |
94af9270 | 12953 | name = dwarf2_name (die, cu); |
c906108c | 12954 | |
e8d05480 JB |
12955 | /* Ignore functions with missing or empty names. These are actually |
12956 | illegal according to the DWARF standard. */ | |
12957 | if (name == NULL) | |
12958 | { | |
b98664d3 | 12959 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12960 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12961 | return; |
12962 | } | |
12963 | ||
12964 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12965 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12966 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12967 | { |
ae4d0c03 PM |
12968 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12969 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 12970 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12971 | "for subprogram DIE at %s"), |
12972 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12973 | return; |
12974 | } | |
c906108c | 12975 | |
3e29f34a MR |
12976 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12977 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12978 | |
34eaf542 TT |
12979 | /* If we have any template arguments, then we must allocate a |
12980 | different sort of symbol. */ | |
436c571c | 12981 | for (child_die = die->child; child_die; child_die = child_die->sibling) |
34eaf542 TT |
12982 | { |
12983 | if (child_die->tag == DW_TAG_template_type_param | |
12984 | || child_die->tag == DW_TAG_template_value_param) | |
12985 | { | |
e623cf5d | 12986 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12987 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12988 | break; |
12989 | } | |
12990 | } | |
12991 | ||
c24bdb02 | 12992 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
12993 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
12994 | (struct symbol *) templ_func); | |
4c2df51b | 12995 | |
81873cc8 | 12996 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 12997 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
12998 | cu->language); |
12999 | ||
4cecd739 DJ |
13000 | /* If there is a location expression for DW_AT_frame_base, record |
13001 | it. */ | |
e142c38c | 13002 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 13003 | if (attr != nullptr) |
fe978cb0 | 13004 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13005 | |
63e43d3a PMR |
13006 | /* If there is a location for the static link, record it. */ |
13007 | newobj->static_link = NULL; | |
13008 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 13009 | if (attr != nullptr) |
63e43d3a | 13010 | { |
224c3ddb SM |
13011 | newobj->static_link |
13012 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 13013 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
09ba997f | 13014 | cu->per_cu->addr_type ()); |
63e43d3a PMR |
13015 | } |
13016 | ||
c24bdb02 | 13017 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13018 | |
639d11d3 | 13019 | if (die->child != NULL) |
c906108c | 13020 | { |
639d11d3 | 13021 | child_die = die->child; |
c906108c SS |
13022 | while (child_die && child_die->tag) |
13023 | { | |
34eaf542 TT |
13024 | if (child_die->tag == DW_TAG_template_type_param |
13025 | || child_die->tag == DW_TAG_template_value_param) | |
13026 | { | |
13027 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13028 | ||
f1078f66 | 13029 | if (arg != NULL) |
2f4732b0 | 13030 | template_args.push_back (arg); |
34eaf542 TT |
13031 | } |
13032 | else | |
13033 | process_die (child_die, cu); | |
436c571c | 13034 | child_die = child_die->sibling; |
c906108c SS |
13035 | } |
13036 | } | |
13037 | ||
d389af10 JK |
13038 | inherit_abstract_dies (die, cu); |
13039 | ||
4a811a97 UW |
13040 | /* If we have a DW_AT_specification, we might need to import using |
13041 | directives from the context of the specification DIE. See the | |
13042 | comment in determine_prefix. */ | |
13043 | if (cu->language == language_cplus | |
13044 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13045 | { | |
13046 | struct dwarf2_cu *spec_cu = cu; | |
13047 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13048 | ||
13049 | while (spec_die) | |
13050 | { | |
13051 | child_die = spec_die->child; | |
13052 | while (child_die && child_die->tag) | |
13053 | { | |
13054 | if (child_die->tag == DW_TAG_imported_module) | |
13055 | process_die (child_die, spec_cu); | |
436c571c | 13056 | child_die = child_die->sibling; |
4a811a97 UW |
13057 | } |
13058 | ||
13059 | /* In some cases, GCC generates specification DIEs that | |
13060 | themselves contain DW_AT_specification attributes. */ | |
13061 | spec_die = die_specification (spec_die, &spec_cu); | |
13062 | } | |
13063 | } | |
13064 | ||
c24bdb02 | 13065 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13066 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13067 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13068 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13069 | |
df8a16a1 | 13070 | /* For C++, set the block's scope. */ |
45280282 IB |
13071 | if ((cu->language == language_cplus |
13072 | || cu->language == language_fortran | |
c44af4eb TT |
13073 | || cu->language == language_d |
13074 | || cu->language == language_rust) | |
4d4ec4e5 | 13075 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13076 | block_set_scope (block, determine_prefix (die, cu), |
13077 | &objfile->objfile_obstack); | |
df8a16a1 | 13078 | |
801e3a5b JB |
13079 | /* If we have address ranges, record them. */ |
13080 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13081 | |
a60f3166 | 13082 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13083 | |
34eaf542 | 13084 | /* Attach template arguments to function. */ |
2f4732b0 | 13085 | if (!template_args.empty ()) |
34eaf542 TT |
13086 | { |
13087 | gdb_assert (templ_func != NULL); | |
13088 | ||
2f4732b0 | 13089 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13090 | templ_func->template_arguments |
8d749320 SM |
13091 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13092 | templ_func->n_template_arguments); | |
34eaf542 | 13093 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13094 | template_args.data (), |
34eaf542 | 13095 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13096 | |
13097 | /* Make sure that the symtab is set on the new symbols. Even | |
13098 | though they don't appear in this symtab directly, other parts | |
13099 | of gdb assume that symbols do, and this is reasonably | |
13100 | true. */ | |
8634679f | 13101 | for (symbol *sym : template_args) |
3e1d3d8c | 13102 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13103 | } |
13104 | ||
208d8187 JB |
13105 | /* In C++, we can have functions nested inside functions (e.g., when |
13106 | a function declares a class that has methods). This means that | |
13107 | when we finish processing a function scope, we may need to go | |
13108 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13109 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13110 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13111 | |
921e78cf JB |
13112 | /* If we've finished processing a top-level function, subsequent |
13113 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13114 | if (cu->get_builder ()->outermost_context_p ()) |
13115 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13116 | } |
13117 | ||
13118 | /* Process all the DIES contained within a lexical block scope. Start | |
13119 | a new scope, process the dies, and then close the scope. */ | |
13120 | ||
13121 | static void | |
e7c27a73 | 13122 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13123 | { |
518817b3 | 13124 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 13125 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
13126 | CORE_ADDR lowpc, highpc; |
13127 | struct die_info *child_die; | |
e142c38c DJ |
13128 | CORE_ADDR baseaddr; |
13129 | ||
b3b3bada | 13130 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13131 | |
13132 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13133 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13134 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13135 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13136 | describe ranges. */ |
e385593e JK |
13137 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13138 | { | |
13139 | case PC_BOUNDS_NOT_PRESENT: | |
13140 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13141 | there was no wrapping by that DW_TAG_lexical_block. | |
13142 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13143 | for (child_die = die->child; | |
13144 | child_die != NULL && child_die->tag; | |
436c571c | 13145 | child_die = child_die->sibling) |
4f7bc5ed TT |
13146 | { |
13147 | /* We might already be processing this DIE. This can happen | |
13148 | in an unusual circumstance -- where a subroutine A | |
13149 | appears lexically in another subroutine B, but A actually | |
13150 | inlines B. The recursion is broken here, rather than in | |
13151 | inherit_abstract_dies, because it seems better to simply | |
13152 | drop concrete children here. */ | |
13153 | if (!child_die->in_process) | |
13154 | process_die (child_die, cu); | |
13155 | } | |
e385593e JK |
13156 | return; |
13157 | case PC_BOUNDS_INVALID: | |
13158 | return; | |
13159 | } | |
3e29f34a MR |
13160 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13161 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13162 | |
c24bdb02 | 13163 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13164 | if (die->child != NULL) |
c906108c | 13165 | { |
639d11d3 | 13166 | child_die = die->child; |
c906108c SS |
13167 | while (child_die && child_die->tag) |
13168 | { | |
e7c27a73 | 13169 | process_die (child_die, cu); |
436c571c | 13170 | child_die = child_die->sibling; |
c906108c SS |
13171 | } |
13172 | } | |
3ea89b92 | 13173 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13174 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13175 | |
c24bdb02 KS |
13176 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13177 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13178 | { |
801e3a5b | 13179 | struct block *block |
c24bdb02 | 13180 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13181 | cstk.start_addr, highpc); |
801e3a5b JB |
13182 | |
13183 | /* Note that recording ranges after traversing children, as we | |
13184 | do here, means that recording a parent's ranges entails | |
13185 | walking across all its children's ranges as they appear in | |
13186 | the address map, which is quadratic behavior. | |
13187 | ||
13188 | It would be nicer to record the parent's ranges before | |
13189 | traversing its children, simply overriding whatever you find | |
13190 | there. But since we don't even decide whether to create a | |
13191 | block until after we've traversed its children, that's hard | |
13192 | to do. */ | |
13193 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13194 | } |
c24bdb02 KS |
13195 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13196 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13197 | } |
13198 | ||
216f72a1 | 13199 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13200 | |
13201 | static void | |
13202 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13203 | { | |
518817b3 | 13204 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 13205 | struct gdbarch *gdbarch = objfile->arch (); |
96408a79 SA |
13206 | CORE_ADDR pc, baseaddr; |
13207 | struct attribute *attr; | |
13208 | struct call_site *call_site, call_site_local; | |
13209 | void **slot; | |
13210 | int nparams; | |
13211 | struct die_info *child_die; | |
13212 | ||
b3b3bada | 13213 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13214 | |
216f72a1 JK |
13215 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13216 | if (attr == NULL) | |
13217 | { | |
13218 | /* This was a pre-DWARF-5 GNU extension alias | |
13219 | for DW_AT_call_return_pc. */ | |
13220 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13221 | } | |
96408a79 SA |
13222 | if (!attr) |
13223 | { | |
b98664d3 | 13224 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13225 | "DIE %s [in module %s]"), |
13226 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13227 | return; |
13228 | } | |
cd6c91b4 | 13229 | pc = attr->value_as_address () + baseaddr; |
3e29f34a | 13230 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13231 | |
13232 | if (cu->call_site_htab == NULL) | |
13233 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13234 | NULL, &objfile->objfile_obstack, | |
13235 | hashtab_obstack_allocate, NULL); | |
13236 | call_site_local.pc = pc; | |
13237 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13238 | if (*slot != NULL) | |
13239 | { | |
b98664d3 | 13240 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13241 | "DIE %s [in module %s]"), |
13242 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13243 | objfile_name (objfile)); |
96408a79 SA |
13244 | return; |
13245 | } | |
13246 | ||
13247 | /* Count parameters at the caller. */ | |
13248 | ||
13249 | nparams = 0; | |
13250 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 13251 | child_die = child_die->sibling) |
96408a79 | 13252 | { |
216f72a1 JK |
13253 | if (child_die->tag != DW_TAG_call_site_parameter |
13254 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13255 | { |
b98664d3 | 13256 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13257 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13258 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13259 | objfile_name (objfile)); |
96408a79 SA |
13260 | continue; |
13261 | } | |
13262 | ||
13263 | nparams++; | |
13264 | } | |
13265 | ||
224c3ddb SM |
13266 | call_site |
13267 | = ((struct call_site *) | |
13268 | obstack_alloc (&objfile->objfile_obstack, | |
13269 | sizeof (*call_site) | |
13270 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13271 | *slot = call_site; |
13272 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13273 | call_site->pc = pc; | |
13274 | ||
216f72a1 JK |
13275 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13276 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13277 | { |
13278 | struct die_info *func_die; | |
13279 | ||
13280 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13281 | for (func_die = die->parent; | |
13282 | func_die && func_die->tag != DW_TAG_subprogram | |
13283 | && func_die->tag != DW_TAG_subroutine_type; | |
13284 | func_die = func_die->parent); | |
13285 | ||
216f72a1 JK |
13286 | /* DW_AT_call_all_calls is a superset |
13287 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13288 | if (func_die |
216f72a1 | 13289 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13290 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13291 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13292 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13293 | { | |
13294 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13295 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13296 | both the initial caller containing the real return address PC and | |
13297 | the final callee containing the current PC of a chain of tail | |
13298 | calls do not need to have the tail call list complete. But any | |
13299 | function candidate for a virtual tail call frame searched via | |
13300 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13301 | determined unambiguously. */ | |
13302 | } | |
13303 | else | |
13304 | { | |
13305 | struct type *func_type = NULL; | |
13306 | ||
13307 | if (func_die) | |
13308 | func_type = get_die_type (func_die, cu); | |
13309 | if (func_type != NULL) | |
13310 | { | |
78134374 | 13311 | gdb_assert (func_type->code () == TYPE_CODE_FUNC); |
96408a79 SA |
13312 | |
13313 | /* Enlist this call site to the function. */ | |
13314 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13315 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13316 | } | |
13317 | else | |
b98664d3 | 13318 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13319 | "DIE %s [in module %s]"), |
13320 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13321 | } |
13322 | } | |
13323 | ||
216f72a1 JK |
13324 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13325 | if (attr == NULL) | |
13326 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13327 | if (attr == NULL) | |
13328 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13329 | if (attr == NULL) |
216f72a1 JK |
13330 | { |
13331 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13332 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13333 | } | |
96408a79 | 13334 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
4fc6c0d5 | 13335 | if (!attr || (attr->form_is_block () && DW_BLOCK (attr)->size == 0)) |
96408a79 | 13336 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13337 | else if (attr->form_is_block ()) |
96408a79 SA |
13338 | { |
13339 | struct dwarf2_locexpr_baton *dlbaton; | |
13340 | ||
8d749320 | 13341 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
13342 | dlbaton->data = DW_BLOCK (attr)->data; |
13343 | dlbaton->size = DW_BLOCK (attr)->size; | |
13344 | dlbaton->per_cu = cu->per_cu; | |
13345 | ||
13346 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13347 | } | |
cd6c91b4 | 13348 | else if (attr->form_is_ref ()) |
96408a79 | 13349 | { |
96408a79 SA |
13350 | struct dwarf2_cu *target_cu = cu; |
13351 | struct die_info *target_die; | |
13352 | ||
ac9ec31b | 13353 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 13354 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
13355 | if (die_is_declaration (target_die, target_cu)) |
13356 | { | |
7d45c7c3 | 13357 | const char *target_physname; |
9112db09 JK |
13358 | |
13359 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13360 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13361 | if (target_physname == NULL) |
9112db09 | 13362 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13363 | if (target_physname == NULL) |
b98664d3 | 13364 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13365 | "physname, for referencing DIE %s [in module %s]"), |
13366 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13367 | else |
7d455152 | 13368 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13369 | } |
13370 | else | |
13371 | { | |
13372 | CORE_ADDR lowpc; | |
13373 | ||
13374 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13375 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13376 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13377 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13378 | "low pc, for referencing DIE %s [in module %s]"), |
13379 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13380 | else |
3e29f34a MR |
13381 | { |
13382 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13383 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13384 | } | |
96408a79 SA |
13385 | } |
13386 | } | |
13387 | else | |
b98664d3 | 13388 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13389 | "block nor reference, for DIE %s [in module %s]"), |
13390 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13391 | |
13392 | call_site->per_cu = cu->per_cu; | |
13393 | ||
13394 | for (child_die = die->child; | |
13395 | child_die && child_die->tag; | |
436c571c | 13396 | child_die = child_die->sibling) |
96408a79 | 13397 | { |
96408a79 | 13398 | struct call_site_parameter *parameter; |
1788b2d3 | 13399 | struct attribute *loc, *origin; |
96408a79 | 13400 | |
216f72a1 JK |
13401 | if (child_die->tag != DW_TAG_call_site_parameter |
13402 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
13403 | { |
13404 | /* Already printed the complaint above. */ | |
13405 | continue; | |
13406 | } | |
13407 | ||
13408 | gdb_assert (call_site->parameter_count < nparams); | |
13409 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13410 | ||
1788b2d3 JK |
13411 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13412 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13413 | register is contained in DW_AT_call_value. */ |
96408a79 | 13414 | |
24c5c679 | 13415 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13416 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13417 | if (origin == NULL) | |
13418 | { | |
13419 | /* This was a pre-DWARF-5 GNU extension alias | |
13420 | for DW_AT_call_parameter. */ | |
13421 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13422 | } | |
cd6c91b4 | 13423 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13424 | { |
1788b2d3 | 13425 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 | 13426 | |
0826b30a | 13427 | sect_offset sect_off = origin->get_ref_die_offset (); |
4057dfde | 13428 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13429 | { |
13430 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13431 | binding can be done only inside one CU. Such referenced DIE | |
13432 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13433 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13434 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13435 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13436 | objfile_name (objfile)); |
d76b7dbc JK |
13437 | continue; |
13438 | } | |
9c541725 PA |
13439 | parameter->u.param_cu_off |
13440 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13441 | } |
4fc6c0d5 | 13442 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13443 | { |
b98664d3 | 13444 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13445 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13446 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13447 | continue; |
13448 | } | |
24c5c679 | 13449 | else |
96408a79 | 13450 | { |
24c5c679 JK |
13451 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
13452 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
13453 | if (parameter->u.dwarf_reg != -1) | |
13454 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
13455 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
13456 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
13457 | ¶meter->u.fb_offset)) | |
13458 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13459 | else | |
13460 | { | |
b98664d3 | 13461 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13462 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13463 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13464 | "[in module %s]"), |
9d8780f0 | 13465 | sect_offset_str (child_die->sect_off), |
9c541725 | 13466 | objfile_name (objfile)); |
24c5c679 JK |
13467 | continue; |
13468 | } | |
96408a79 SA |
13469 | } |
13470 | ||
216f72a1 JK |
13471 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13472 | if (attr == NULL) | |
13473 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13474 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13475 | { |
b98664d3 | 13476 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13477 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13478 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13479 | objfile_name (objfile)); |
96408a79 SA |
13480 | continue; |
13481 | } | |
13482 | parameter->value = DW_BLOCK (attr)->data; | |
13483 | parameter->value_size = DW_BLOCK (attr)->size; | |
13484 | ||
13485 | /* Parameters are not pre-cleared by memset above. */ | |
13486 | parameter->data_value = NULL; | |
13487 | parameter->data_value_size = 0; | |
13488 | call_site->parameter_count++; | |
13489 | ||
216f72a1 JK |
13490 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13491 | if (attr == NULL) | |
13492 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13493 | if (attr != nullptr) |
96408a79 | 13494 | { |
4fc6c0d5 | 13495 | if (!attr->form_is_block ()) |
b98664d3 | 13496 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
13497 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13498 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13499 | objfile_name (objfile)); |
96408a79 SA |
13500 | else |
13501 | { | |
13502 | parameter->data_value = DW_BLOCK (attr)->data; | |
13503 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13504 | } | |
13505 | } | |
13506 | } | |
13507 | } | |
13508 | ||
71a3c369 TT |
13509 | /* Helper function for read_variable. If DIE represents a virtual |
13510 | table, then return the type of the concrete object that is | |
13511 | associated with the virtual table. Otherwise, return NULL. */ | |
13512 | ||
13513 | static struct type * | |
13514 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13515 | { | |
13516 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13517 | if (attr == NULL) | |
13518 | return NULL; | |
13519 | ||
13520 | /* Find the type DIE. */ | |
13521 | struct die_info *type_die = NULL; | |
13522 | struct dwarf2_cu *type_cu = cu; | |
13523 | ||
cd6c91b4 | 13524 | if (attr->form_is_ref ()) |
71a3c369 TT |
13525 | type_die = follow_die_ref (die, attr, &type_cu); |
13526 | if (type_die == NULL) | |
13527 | return NULL; | |
13528 | ||
13529 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13530 | return NULL; | |
13531 | return die_containing_type (type_die, type_cu); | |
13532 | } | |
13533 | ||
13534 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13535 | ||
13536 | static void | |
13537 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13538 | { | |
13539 | struct rust_vtable_symbol *storage = NULL; | |
13540 | ||
13541 | if (cu->language == language_rust) | |
13542 | { | |
13543 | struct type *containing_type = rust_containing_type (die, cu); | |
13544 | ||
13545 | if (containing_type != NULL) | |
13546 | { | |
518817b3 | 13547 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 | 13548 | |
468c0cbb | 13549 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol (); |
71a3c369 TT |
13550 | initialize_objfile_symbol (storage); |
13551 | storage->concrete_type = containing_type; | |
cf724bc9 | 13552 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13553 | } |
13554 | } | |
13555 | ||
e4a62c65 TV |
13556 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13557 | struct attribute *abstract_origin | |
13558 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13559 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13560 | if (res == NULL && loc && abstract_origin) | |
13561 | { | |
13562 | /* We have a variable without a name, but with a location and an abstract | |
13563 | origin. This may be a concrete instance of an abstract variable | |
13564 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13565 | later. */ | |
13566 | struct dwarf2_cu *origin_cu = cu; | |
13567 | struct die_info *origin_die | |
13568 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
13569 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 13570 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 13571 | } |
71a3c369 TT |
13572 | } |
13573 | ||
43988095 JK |
13574 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13575 | reading .debug_rnglists. | |
13576 | Callback's type should be: | |
13577 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13578 | Return true if the attributes are present and valid, otherwise, | |
13579 | return false. */ | |
13580 | ||
13581 | template <typename Callback> | |
13582 | static bool | |
13583 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13584 | Callback &&callback) | |
13585 | { | |
ed2dc618 | 13586 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13587 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13588 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 13589 | bfd *obfd = objfile->obfd; |
43988095 | 13590 | /* Base address selection entry. */ |
2b24b6e4 | 13591 | gdb::optional<CORE_ADDR> base; |
43988095 | 13592 | const gdb_byte *buffer; |
43988095 JK |
13593 | CORE_ADDR baseaddr; |
13594 | bool overflow = false; | |
13595 | ||
43988095 JK |
13596 | base = cu->base_address; |
13597 | ||
96b79293 | 13598 | dwarf2_per_objfile->rnglists.read (objfile); |
43988095 JK |
13599 | if (offset >= dwarf2_per_objfile->rnglists.size) |
13600 | { | |
b98664d3 | 13601 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13602 | offset); |
13603 | return false; | |
13604 | } | |
13605 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13606 | ||
b3b3bada | 13607 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13608 | |
13609 | while (1) | |
13610 | { | |
7814882a JK |
13611 | /* Initialize it due to a false compiler warning. */ |
13612 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13613 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13614 | + dwarf2_per_objfile->rnglists.size); | |
13615 | unsigned int bytes_read; | |
13616 | ||
13617 | if (buffer == buf_end) | |
13618 | { | |
13619 | overflow = true; | |
13620 | break; | |
13621 | } | |
13622 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13623 | switch (rlet) | |
13624 | { | |
13625 | case DW_RLE_end_of_list: | |
13626 | break; | |
13627 | case DW_RLE_base_address: | |
13628 | if (buffer + cu->header.addr_size > buf_end) | |
13629 | { | |
13630 | overflow = true; | |
13631 | break; | |
13632 | } | |
c8a7a66f | 13633 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13634 | buffer += bytes_read; |
13635 | break; | |
13636 | case DW_RLE_start_length: | |
13637 | if (buffer + cu->header.addr_size > buf_end) | |
13638 | { | |
13639 | overflow = true; | |
13640 | break; | |
13641 | } | |
c8a7a66f TT |
13642 | range_beginning = cu->header.read_address (obfd, buffer, |
13643 | &bytes_read); | |
43988095 JK |
13644 | buffer += bytes_read; |
13645 | range_end = (range_beginning | |
13646 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13647 | buffer += bytes_read; | |
13648 | if (buffer > buf_end) | |
13649 | { | |
13650 | overflow = true; | |
13651 | break; | |
13652 | } | |
13653 | break; | |
13654 | case DW_RLE_offset_pair: | |
13655 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13656 | buffer += bytes_read; | |
13657 | if (buffer > buf_end) | |
13658 | { | |
13659 | overflow = true; | |
13660 | break; | |
13661 | } | |
13662 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13663 | buffer += bytes_read; | |
13664 | if (buffer > buf_end) | |
13665 | { | |
13666 | overflow = true; | |
13667 | break; | |
13668 | } | |
13669 | break; | |
13670 | case DW_RLE_start_end: | |
13671 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13672 | { | |
13673 | overflow = true; | |
13674 | break; | |
13675 | } | |
c8a7a66f TT |
13676 | range_beginning = cu->header.read_address (obfd, buffer, |
13677 | &bytes_read); | |
43988095 | 13678 | buffer += bytes_read; |
c8a7a66f | 13679 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13680 | buffer += bytes_read; |
13681 | break; | |
13682 | default: | |
b98664d3 | 13683 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13684 | return false; |
13685 | } | |
13686 | if (rlet == DW_RLE_end_of_list || overflow) | |
13687 | break; | |
13688 | if (rlet == DW_RLE_base_address) | |
13689 | continue; | |
13690 | ||
2b24b6e4 | 13691 | if (!base.has_value ()) |
43988095 JK |
13692 | { |
13693 | /* We have no valid base address for the ranges | |
13694 | data. */ | |
b98664d3 | 13695 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13696 | return false; |
13697 | } | |
13698 | ||
13699 | if (range_beginning > range_end) | |
13700 | { | |
13701 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13702 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13703 | return false; |
13704 | } | |
13705 | ||
13706 | /* Empty range entries have no effect. */ | |
13707 | if (range_beginning == range_end) | |
13708 | continue; | |
13709 | ||
2b24b6e4 TT |
13710 | range_beginning += *base; |
13711 | range_end += *base; | |
43988095 JK |
13712 | |
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_rnglists entry has start address of zero" |
43988095 JK |
13719 | " [in module %s]"), objfile_name (objfile)); |
13720 | continue; | |
13721 | } | |
13722 | ||
13723 | callback (range_beginning, range_end); | |
13724 | } | |
13725 | ||
13726 | if (overflow) | |
13727 | { | |
b98664d3 | 13728 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13729 | "for DW_AT_ranges attribute"), |
13730 | offset); | |
13731 | return false; | |
13732 | } | |
13733 | ||
13734 | return true; | |
13735 | } | |
13736 | ||
13737 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13738 | Callback's type should be: | |
13739 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13740 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13741 | |
43988095 | 13742 | template <typename Callback> |
43039443 | 13743 | static int |
5f46c5a5 | 13744 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13745 | Callback &&callback) |
43039443 | 13746 | { |
ed2dc618 | 13747 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13748 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13749 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
13750 | struct comp_unit_head *cu_header = &cu->header; |
13751 | bfd *obfd = objfile->obfd; | |
13752 | unsigned int addr_size = cu_header->addr_size; | |
13753 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13754 | /* Base address selection entry. */ | |
2b24b6e4 | 13755 | gdb::optional<CORE_ADDR> base; |
43039443 | 13756 | unsigned int dummy; |
d521ce57 | 13757 | const gdb_byte *buffer; |
ff013f42 | 13758 | CORE_ADDR baseaddr; |
43039443 | 13759 | |
43988095 JK |
13760 | if (cu_header->version >= 5) |
13761 | return dwarf2_rnglists_process (offset, cu, callback); | |
13762 | ||
d00adf39 | 13763 | base = cu->base_address; |
43039443 | 13764 | |
96b79293 | 13765 | dwarf2_per_objfile->ranges.read (objfile); |
dce234bc | 13766 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 13767 | { |
b98664d3 | 13768 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13769 | offset); |
13770 | return 0; | |
13771 | } | |
dce234bc | 13772 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13773 | |
b3b3bada | 13774 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13775 | |
43039443 JK |
13776 | while (1) |
13777 | { | |
13778 | CORE_ADDR range_beginning, range_end; | |
13779 | ||
c8a7a66f | 13780 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13781 | buffer += addr_size; |
c8a7a66f | 13782 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13783 | buffer += addr_size; |
13784 | offset += 2 * addr_size; | |
13785 | ||
13786 | /* An end of list marker is a pair of zero addresses. */ | |
13787 | if (range_beginning == 0 && range_end == 0) | |
13788 | /* Found the end of list entry. */ | |
13789 | break; | |
13790 | ||
13791 | /* Each base address selection entry is a pair of 2 values. | |
13792 | The first is the largest possible address, the second is | |
13793 | the base address. Check for a base address here. */ | |
13794 | if ((range_beginning & mask) == mask) | |
13795 | { | |
28d2bfb9 AB |
13796 | /* If we found the largest possible address, then we already |
13797 | have the base address in range_end. */ | |
13798 | base = range_end; | |
43039443 JK |
13799 | continue; |
13800 | } | |
13801 | ||
2b24b6e4 | 13802 | if (!base.has_value ()) |
43039443 JK |
13803 | { |
13804 | /* We have no valid base address for the ranges | |
13805 | data. */ | |
b98664d3 | 13806 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13807 | return 0; |
13808 | } | |
13809 | ||
9277c30c UW |
13810 | if (range_beginning > range_end) |
13811 | { | |
13812 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13813 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13814 | return 0; |
13815 | } | |
13816 | ||
13817 | /* Empty range entries have no effect. */ | |
13818 | if (range_beginning == range_end) | |
13819 | continue; | |
13820 | ||
2b24b6e4 TT |
13821 | range_beginning += *base; |
13822 | range_end += *base; | |
43039443 | 13823 | |
01093045 DE |
13824 | /* A not-uncommon case of bad debug info. |
13825 | Don't pollute the addrmap with bad data. */ | |
13826 | if (range_beginning + baseaddr == 0 | |
13827 | && !dwarf2_per_objfile->has_section_at_zero) | |
13828 | { | |
b98664d3 | 13829 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13830 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13831 | continue; |
13832 | } | |
13833 | ||
5f46c5a5 JK |
13834 | callback (range_beginning, range_end); |
13835 | } | |
13836 | ||
13837 | return 1; | |
13838 | } | |
13839 | ||
13840 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13841 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13842 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13843 | ||
13844 | static int | |
13845 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13846 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
891813be | 13847 | dwarf2_psymtab *ranges_pst) |
5f46c5a5 | 13848 | { |
518817b3 | 13849 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 13850 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 13851 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13852 | int low_set = 0; |
13853 | CORE_ADDR low = 0; | |
13854 | CORE_ADDR high = 0; | |
13855 | int retval; | |
13856 | ||
13857 | retval = dwarf2_ranges_process (offset, cu, | |
13858 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13859 | { | |
9277c30c | 13860 | if (ranges_pst != NULL) |
3e29f34a MR |
13861 | { |
13862 | CORE_ADDR lowpc; | |
13863 | CORE_ADDR highpc; | |
13864 | ||
79748972 TT |
13865 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13866 | range_beginning + baseaddr) | |
13867 | - baseaddr); | |
13868 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13869 | range_end + baseaddr) | |
13870 | - baseaddr); | |
d320c2b5 TT |
13871 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
13872 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 13873 | } |
ff013f42 | 13874 | |
43039443 JK |
13875 | /* FIXME: This is recording everything as a low-high |
13876 | segment of consecutive addresses. We should have a | |
13877 | data structure for discontiguous block ranges | |
13878 | instead. */ | |
13879 | if (! low_set) | |
13880 | { | |
13881 | low = range_beginning; | |
13882 | high = range_end; | |
13883 | low_set = 1; | |
13884 | } | |
13885 | else | |
13886 | { | |
13887 | if (range_beginning < low) | |
13888 | low = range_beginning; | |
13889 | if (range_end > high) | |
13890 | high = range_end; | |
13891 | } | |
5f46c5a5 JK |
13892 | }); |
13893 | if (!retval) | |
13894 | return 0; | |
43039443 JK |
13895 | |
13896 | if (! low_set) | |
13897 | /* If the first entry is an end-of-list marker, the range | |
13898 | describes an empty scope, i.e. no instructions. */ | |
13899 | return 0; | |
13900 | ||
13901 | if (low_return) | |
13902 | *low_return = low; | |
13903 | if (high_return) | |
13904 | *high_return = high; | |
13905 | return 1; | |
13906 | } | |
13907 | ||
3a2b436a JK |
13908 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13909 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13910 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13911 | |
3a2b436a | 13912 | static enum pc_bounds_kind |
af34e669 | 13913 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13914 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13915 | dwarf2_psymtab *pst) |
c906108c | 13916 | { |
518817b3 SM |
13917 | struct dwarf2_per_objfile *dwarf2_per_objfile |
13918 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 13919 | struct attribute *attr; |
91da1414 | 13920 | struct attribute *attr_high; |
af34e669 DJ |
13921 | CORE_ADDR low = 0; |
13922 | CORE_ADDR high = 0; | |
e385593e | 13923 | enum pc_bounds_kind ret; |
c906108c | 13924 | |
91da1414 MW |
13925 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13926 | if (attr_high) | |
af34e669 | 13927 | { |
e142c38c | 13928 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13929 | if (attr != nullptr) |
91da1414 | 13930 | { |
cd6c91b4 TT |
13931 | low = attr->value_as_address (); |
13932 | high = attr_high->value_as_address (); | |
13933 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) | |
31aa7e4e | 13934 | high += low; |
91da1414 | 13935 | } |
af34e669 DJ |
13936 | else |
13937 | /* Found high w/o low attribute. */ | |
e385593e | 13938 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13939 | |
13940 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13941 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13942 | } |
c906108c | 13943 | else |
af34e669 | 13944 | { |
e142c38c | 13945 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13946 | if (attr != NULL) |
13947 | { | |
18a8505e | 13948 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
13949 | We take advantage of the fact that DW_AT_ranges does not appear |
13950 | in DW_TAG_compile_unit of DWO files. */ | |
13951 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13952 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13953 | + (need_ranges_base | |
13954 | ? cu->ranges_base | |
13955 | : 0)); | |
2e3cf129 | 13956 | |
af34e669 | 13957 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13958 | .debug_ranges section. */ |
2e3cf129 | 13959 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13960 | return PC_BOUNDS_INVALID; |
43039443 | 13961 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13962 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13963 | } |
e385593e JK |
13964 | else |
13965 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13966 | } |
c906108c | 13967 | |
48fbe735 | 13968 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 13969 | if (high <= low) |
e385593e | 13970 | return PC_BOUNDS_INVALID; |
c906108c SS |
13971 | |
13972 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13973 | eliminate duplicate copies of functions and vtables and such. | |
13974 | The linker will arbitrarily choose one and discard the others. | |
13975 | The AT_*_pc values for such functions refer to local labels in | |
13976 | these sections. If the section from that file was discarded, the | |
13977 | labels are not in the output, so the relocs get a value of 0. | |
13978 | If this is a discarded function, mark the pc bounds as invalid, | |
13979 | so that GDB will ignore it. */ | |
72dca2f5 | 13980 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13981 | return PC_BOUNDS_INVALID; |
c906108c SS |
13982 | |
13983 | *lowpc = low; | |
96408a79 SA |
13984 | if (highpc) |
13985 | *highpc = high; | |
af34e669 | 13986 | return ret; |
c906108c SS |
13987 | } |
13988 | ||
b084d499 JB |
13989 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13990 | its low and high PC addresses. Do nothing if these addresses could not | |
13991 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13992 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13993 | ||
13994 | static void | |
13995 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13996 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13997 | struct dwarf2_cu *cu) | |
13998 | { | |
13999 | CORE_ADDR low, high; | |
14000 | struct die_info *child = die->child; | |
14001 | ||
e385593e | 14002 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14003 | { |
325fac50 PA |
14004 | *lowpc = std::min (*lowpc, low); |
14005 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14006 | } |
14007 | ||
14008 | /* If the language does not allow nested subprograms (either inside | |
14009 | subprograms or lexical blocks), we're done. */ | |
14010 | if (cu->language != language_ada) | |
14011 | return; | |
6e70227d | 14012 | |
b084d499 JB |
14013 | /* Check all the children of the given DIE. If it contains nested |
14014 | subprograms, then check their pc bounds. Likewise, we need to | |
14015 | check lexical blocks as well, as they may also contain subprogram | |
14016 | definitions. */ | |
14017 | while (child && child->tag) | |
14018 | { | |
14019 | if (child->tag == DW_TAG_subprogram | |
14020 | || child->tag == DW_TAG_lexical_block) | |
14021 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
436c571c | 14022 | child = child->sibling; |
b084d499 JB |
14023 | } |
14024 | } | |
14025 | ||
fae299cd DC |
14026 | /* Get the low and high pc's represented by the scope DIE, and store |
14027 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14028 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14029 | ||
14030 | static void | |
14031 | get_scope_pc_bounds (struct die_info *die, | |
14032 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14033 | struct dwarf2_cu *cu) | |
14034 | { | |
14035 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14036 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14037 | CORE_ADDR current_low, current_high; | |
14038 | ||
3a2b436a | 14039 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14040 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14041 | { |
14042 | best_low = current_low; | |
14043 | best_high = current_high; | |
14044 | } | |
14045 | else | |
14046 | { | |
14047 | struct die_info *child = die->child; | |
14048 | ||
14049 | while (child && child->tag) | |
14050 | { | |
14051 | switch (child->tag) { | |
14052 | case DW_TAG_subprogram: | |
b084d499 | 14053 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14054 | break; |
14055 | case DW_TAG_namespace: | |
f55ee35c | 14056 | case DW_TAG_module: |
fae299cd DC |
14057 | /* FIXME: carlton/2004-01-16: Should we do this for |
14058 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14059 | that current GCC's always emit the DIEs corresponding | |
14060 | to definitions of methods of classes as children of a | |
14061 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14062 | the DIEs giving the declarations, which could be | |
14063 | anywhere). But I don't see any reason why the | |
14064 | standards says that they have to be there. */ | |
14065 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14066 | ||
14067 | if (current_low != ((CORE_ADDR) -1)) | |
14068 | { | |
325fac50 PA |
14069 | best_low = std::min (best_low, current_low); |
14070 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14071 | } |
14072 | break; | |
14073 | default: | |
0963b4bd | 14074 | /* Ignore. */ |
fae299cd DC |
14075 | break; |
14076 | } | |
14077 | ||
436c571c | 14078 | child = child->sibling; |
fae299cd DC |
14079 | } |
14080 | } | |
14081 | ||
14082 | *lowpc = best_low; | |
14083 | *highpc = best_high; | |
14084 | } | |
14085 | ||
801e3a5b JB |
14086 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14087 | in DIE. */ | |
380bca97 | 14088 | |
801e3a5b JB |
14089 | static void |
14090 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14091 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14092 | { | |
518817b3 | 14093 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 14094 | struct gdbarch *gdbarch = objfile->arch (); |
801e3a5b | 14095 | struct attribute *attr; |
91da1414 | 14096 | struct attribute *attr_high; |
801e3a5b | 14097 | |
91da1414 MW |
14098 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14099 | if (attr_high) | |
801e3a5b | 14100 | { |
801e3a5b | 14101 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14102 | if (attr != nullptr) |
801e3a5b | 14103 | { |
cd6c91b4 TT |
14104 | CORE_ADDR low = attr->value_as_address (); |
14105 | CORE_ADDR high = attr_high->value_as_address (); | |
31aa7e4e | 14106 | |
cd6c91b4 | 14107 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14108 | high += low; |
9a619af0 | 14109 | |
3e29f34a MR |
14110 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14111 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14112 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14113 | } |
14114 | } | |
14115 | ||
14116 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
435d3d88 | 14117 | if (attr != nullptr) |
801e3a5b | 14118 | { |
18a8505e | 14119 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
14120 | We take advantage of the fact that DW_AT_ranges does not appear |
14121 | in DW_TAG_compile_unit of DWO files. */ | |
14122 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14123 | |
14124 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14125 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14126 | unsigned long offset = (DW_UNSND (attr) |
14127 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14128 | |
2d5f09ec | 14129 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14130 | dwarf2_ranges_process (offset, cu, |
14131 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14132 | { | |
58fdfd2c JK |
14133 | start += baseaddr; |
14134 | end += baseaddr; | |
5f46c5a5 JK |
14135 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14136 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14137 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14138 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14139 | }); |
2d5f09ec KB |
14140 | |
14141 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14142 | } |
14143 | } | |
14144 | ||
685b1105 JK |
14145 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14146 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14147 | |
685b1105 JK |
14148 | static void |
14149 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14150 | { |
38360086 | 14151 | int major, minor; |
60d5a603 JK |
14152 | |
14153 | if (cu->producer == NULL) | |
14154 | { | |
14155 | /* For unknown compilers expect their behavior is DWARF version | |
14156 | compliant. | |
14157 | ||
14158 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14159 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14160 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14161 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14162 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14163 | } |
b1ffba5a | 14164 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14165 | { |
38360086 MW |
14166 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14167 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14168 | } |
5230b05a | 14169 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14170 | { |
14171 | cu->producer_is_icc = true; | |
14172 | cu->producer_is_icc_lt_14 = major < 14; | |
14173 | } | |
c258c396 JD |
14174 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14175 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14176 | else |
14177 | { | |
14178 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14179 | compliant. */ | |
60d5a603 JK |
14180 | } |
14181 | ||
9068261f | 14182 | cu->checked_producer = true; |
685b1105 | 14183 | } |
ba919b58 | 14184 | |
685b1105 JK |
14185 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14186 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14187 | during 4.6.0 experimental. */ | |
14188 | ||
9068261f | 14189 | static bool |
685b1105 JK |
14190 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14191 | { | |
14192 | if (!cu->checked_producer) | |
14193 | check_producer (cu); | |
14194 | ||
14195 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14196 | } |
14197 | ||
c258c396 JD |
14198 | |
14199 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14200 | with incorrect is_stmt attributes. */ | |
14201 | ||
14202 | static bool | |
14203 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14204 | { | |
14205 | if (!cu->checked_producer) | |
14206 | check_producer (cu); | |
14207 | ||
14208 | return cu->producer_is_codewarrior; | |
14209 | } | |
14210 | ||
405feb71 | 14211 | /* Return the default accessibility type if it is not overridden by |
60d5a603 JK |
14212 | DW_AT_accessibility. */ |
14213 | ||
14214 | static enum dwarf_access_attribute | |
14215 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14216 | { | |
14217 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14218 | { | |
14219 | /* The default DWARF 2 accessibility for members is public, the default | |
14220 | accessibility for inheritance is private. */ | |
14221 | ||
14222 | if (die->tag != DW_TAG_inheritance) | |
14223 | return DW_ACCESS_public; | |
14224 | else | |
14225 | return DW_ACCESS_private; | |
14226 | } | |
14227 | else | |
14228 | { | |
14229 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14230 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14231 | depends on the container kind. */ | |
14232 | ||
14233 | if (die->parent->tag == DW_TAG_class_type) | |
14234 | return DW_ACCESS_private; | |
14235 | else | |
14236 | return DW_ACCESS_public; | |
14237 | } | |
14238 | } | |
14239 | ||
74ac6d43 TT |
14240 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14241 | offset. If the attribute was not found return 0, otherwise return | |
14242 | 1. If it was found but could not properly be handled, set *OFFSET | |
14243 | to 0. */ | |
14244 | ||
14245 | static int | |
14246 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14247 | LONGEST *offset) | |
14248 | { | |
14249 | struct attribute *attr; | |
14250 | ||
14251 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14252 | if (attr != NULL) | |
14253 | { | |
14254 | *offset = 0; | |
14255 | ||
14256 | /* Note that we do not check for a section offset first here. | |
14257 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14258 | so if we see it, we can assume that a constant form is really | |
14259 | a constant and not a section offset. */ | |
cd6c91b4 | 14260 | if (attr->form_is_constant ()) |
0826b30a | 14261 | *offset = attr->constant_value (0); |
cd6c91b4 | 14262 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14263 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14264 | else if (attr->form_is_block ()) |
74ac6d43 TT |
14265 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
14266 | else | |
14267 | dwarf2_complex_location_expr_complaint (); | |
14268 | ||
14269 | return 1; | |
14270 | } | |
14271 | ||
14272 | return 0; | |
14273 | } | |
14274 | ||
7d79de9a TT |
14275 | /* Look for DW_AT_data_member_location and store the results in FIELD. */ |
14276 | ||
14277 | static void | |
14278 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14279 | struct field *field) | |
14280 | { | |
14281 | struct attribute *attr; | |
14282 | ||
14283 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14284 | if (attr != NULL) | |
14285 | { | |
14286 | if (attr->form_is_constant ()) | |
14287 | { | |
14288 | LONGEST offset = attr->constant_value (0); | |
14289 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14290 | } | |
14291 | else if (attr->form_is_section_offset ()) | |
14292 | dwarf2_complex_location_expr_complaint (); | |
14293 | else if (attr->form_is_block ()) | |
14294 | { | |
14295 | bool handled; | |
14296 | CORE_ADDR offset = decode_locdesc (DW_BLOCK (attr), cu, &handled); | |
14297 | if (handled) | |
14298 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14299 | else | |
14300 | { | |
14301 | struct objfile *objfile | |
14302 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
14303 | struct dwarf2_locexpr_baton *dlbaton | |
14304 | = XOBNEW (&objfile->objfile_obstack, | |
14305 | struct dwarf2_locexpr_baton); | |
14306 | dlbaton->data = DW_BLOCK (attr)->data; | |
14307 | dlbaton->size = DW_BLOCK (attr)->size; | |
14308 | /* When using this baton, we want to compute the address | |
14309 | of the field, not the value. This is why | |
14310 | is_reference is set to false here. */ | |
14311 | dlbaton->is_reference = false; | |
14312 | dlbaton->per_cu = cu->per_cu; | |
14313 | ||
14314 | SET_FIELD_DWARF_BLOCK (*field, dlbaton); | |
14315 | } | |
14316 | } | |
14317 | else | |
14318 | dwarf2_complex_location_expr_complaint (); | |
14319 | } | |
14320 | } | |
14321 | ||
c906108c SS |
14322 | /* Add an aggregate field to the field list. */ |
14323 | ||
14324 | static void | |
107d2387 | 14325 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14326 | struct dwarf2_cu *cu) |
6e70227d | 14327 | { |
518817b3 | 14328 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 14329 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
14330 | struct nextfield *new_field; |
14331 | struct attribute *attr; | |
14332 | struct field *fp; | |
15d034d0 | 14333 | const char *fieldname = ""; |
c906108c | 14334 | |
7d0ccb61 DJ |
14335 | if (die->tag == DW_TAG_inheritance) |
14336 | { | |
be2daae6 TT |
14337 | fip->baseclasses.emplace_back (); |
14338 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14339 | } |
14340 | else | |
14341 | { | |
be2daae6 TT |
14342 | fip->fields.emplace_back (); |
14343 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14344 | } |
be2daae6 | 14345 | |
9c6a1327 TT |
14346 | new_field->offset = die->sect_off; |
14347 | ||
e142c38c | 14348 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14349 | if (attr != nullptr) |
c906108c | 14350 | new_field->accessibility = DW_UNSND (attr); |
60d5a603 JK |
14351 | else |
14352 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14353 | if (new_field->accessibility != DW_ACCESS_public) |
14354 | fip->non_public_fields = 1; | |
60d5a603 | 14355 | |
e142c38c | 14356 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14357 | if (attr != nullptr) |
c906108c | 14358 | new_field->virtuality = DW_UNSND (attr); |
60d5a603 JK |
14359 | else |
14360 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14361 | |
14362 | fp = &new_field->field; | |
a9a9bd0f | 14363 | |
e142c38c | 14364 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14365 | { |
a9a9bd0f | 14366 | /* Data member other than a C++ static data member. */ |
6e70227d | 14367 | |
c906108c | 14368 | /* Get type of field. */ |
e7c27a73 | 14369 | fp->type = die_type (die, cu); |
c906108c | 14370 | |
d6a843b5 | 14371 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14372 | |
c906108c | 14373 | /* Get bit size of field (zero if none). */ |
e142c38c | 14374 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14375 | if (attr != nullptr) |
c906108c SS |
14376 | { |
14377 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
14378 | } | |
14379 | else | |
14380 | { | |
14381 | FIELD_BITSIZE (*fp) = 0; | |
14382 | } | |
14383 | ||
14384 | /* Get bit offset of field. */ | |
7d79de9a | 14385 | handle_data_member_location (die, cu, fp); |
e142c38c | 14386 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
435d3d88 | 14387 | if (attr != nullptr) |
c906108c | 14388 | { |
d5a22e77 | 14389 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14390 | { |
14391 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
14392 | additional bit offset from the MSB of the containing |
14393 | anonymous object to the MSB of the field. We don't | |
14394 | have to do anything special since we don't need to | |
14395 | know the size of the anonymous object. */ | |
f41f5e61 | 14396 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
14397 | } |
14398 | else | |
14399 | { | |
14400 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
14401 | MSB of the anonymous object, subtract off the number of |
14402 | bits from the MSB of the field to the MSB of the | |
14403 | object, and then subtract off the number of bits of | |
14404 | the field itself. The result is the bit offset of | |
14405 | the LSB of the field. */ | |
c906108c SS |
14406 | int anonymous_size; |
14407 | int bit_offset = DW_UNSND (attr); | |
14408 | ||
e142c38c | 14409 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 14410 | if (attr != nullptr) |
c906108c SS |
14411 | { |
14412 | /* The size of the anonymous object containing | |
14413 | the bit field is explicit, so use the | |
14414 | indicated size (in bytes). */ | |
14415 | anonymous_size = DW_UNSND (attr); | |
14416 | } | |
14417 | else | |
14418 | { | |
14419 | /* The size of the anonymous object containing | |
14420 | the bit field must be inferred from the type | |
14421 | attribute of the data member containing the | |
14422 | bit field. */ | |
14423 | anonymous_size = TYPE_LENGTH (fp->type); | |
14424 | } | |
f41f5e61 PA |
14425 | SET_FIELD_BITPOS (*fp, |
14426 | (FIELD_BITPOS (*fp) | |
14427 | + anonymous_size * bits_per_byte | |
14428 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14429 | } |
14430 | } | |
da5b30da AA |
14431 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14432 | if (attr != NULL) | |
14433 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
0826b30a | 14434 | + attr->constant_value (0))); |
c906108c SS |
14435 | |
14436 | /* Get name of field. */ | |
39cbfefa DJ |
14437 | fieldname = dwarf2_name (die, cu); |
14438 | if (fieldname == NULL) | |
14439 | fieldname = ""; | |
d8151005 DJ |
14440 | |
14441 | /* The name is already allocated along with this objfile, so we don't | |
14442 | need to duplicate it for the type. */ | |
14443 | fp->name = fieldname; | |
c906108c SS |
14444 | |
14445 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 14446 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14447 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14448 | { |
d48cc9dd | 14449 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
14450 | new_field->accessibility = DW_ACCESS_private; |
14451 | fip->non_public_fields = 1; | |
14452 | } | |
14453 | } | |
a9a9bd0f | 14454 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14455 | { |
a9a9bd0f DC |
14456 | /* C++ static member. */ |
14457 | ||
14458 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14459 | is a declaration, but all versions of G++ as of this writing | |
14460 | (so through at least 3.2.1) incorrectly generate | |
14461 | DW_TAG_variable tags. */ | |
6e70227d | 14462 | |
ff355380 | 14463 | const char *physname; |
c906108c | 14464 | |
a9a9bd0f | 14465 | /* Get name of field. */ |
39cbfefa DJ |
14466 | fieldname = dwarf2_name (die, cu); |
14467 | if (fieldname == NULL) | |
c906108c SS |
14468 | return; |
14469 | ||
254e6b9e | 14470 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14471 | if (attr |
14472 | /* Only create a symbol if this is an external value. | |
14473 | new_symbol checks this and puts the value in the global symbol | |
14474 | table, which we want. If it is not external, new_symbol | |
14475 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14476 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14477 | { |
14478 | /* A static const member, not much different than an enum as far as | |
14479 | we're concerned, except that we can support more types. */ | |
14480 | new_symbol (die, NULL, cu); | |
14481 | } | |
14482 | ||
2df3850c | 14483 | /* Get physical name. */ |
ff355380 | 14484 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14485 | |
d8151005 DJ |
14486 | /* The name is already allocated along with this objfile, so we don't |
14487 | need to duplicate it for the type. */ | |
14488 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 14489 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 14490 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14491 | } |
14492 | else if (die->tag == DW_TAG_inheritance) | |
14493 | { | |
74ac6d43 | 14494 | /* C++ base class field. */ |
7d79de9a | 14495 | handle_data_member_location (die, cu, fp); |
c906108c | 14496 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 14497 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 14498 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 14499 | } |
2ddeaf8a TT |
14500 | else |
14501 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14502 | } |
14503 | ||
883fd55a KS |
14504 | /* Can the type given by DIE define another type? */ |
14505 | ||
14506 | static bool | |
14507 | type_can_define_types (const struct die_info *die) | |
14508 | { | |
14509 | switch (die->tag) | |
14510 | { | |
14511 | case DW_TAG_typedef: | |
14512 | case DW_TAG_class_type: | |
14513 | case DW_TAG_structure_type: | |
14514 | case DW_TAG_union_type: | |
14515 | case DW_TAG_enumeration_type: | |
14516 | return true; | |
14517 | ||
14518 | default: | |
14519 | return false; | |
14520 | } | |
14521 | } | |
14522 | ||
14523 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14524 | |
14525 | static void | |
883fd55a KS |
14526 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14527 | struct dwarf2_cu *cu) | |
6e70227d | 14528 | { |
be2daae6 TT |
14529 | struct decl_field fp; |
14530 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14531 | |
883fd55a | 14532 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14533 | |
883fd55a | 14534 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14535 | fp.name = dwarf2_name (die, cu); |
14536 | fp.type = read_type_die (die, cu); | |
98751a41 | 14537 | |
c191a687 KS |
14538 | /* Save accessibility. */ |
14539 | enum dwarf_access_attribute accessibility; | |
14540 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14541 | if (attr != NULL) | |
14542 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14543 | else | |
14544 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14545 | switch (accessibility) | |
14546 | { | |
14547 | case DW_ACCESS_public: | |
14548 | /* The assumed value if neither private nor protected. */ | |
14549 | break; | |
14550 | case DW_ACCESS_private: | |
be2daae6 | 14551 | fp.is_private = 1; |
c191a687 KS |
14552 | break; |
14553 | case DW_ACCESS_protected: | |
be2daae6 | 14554 | fp.is_protected = 1; |
c191a687 KS |
14555 | break; |
14556 | default: | |
b98664d3 | 14557 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
14558 | } |
14559 | ||
883fd55a | 14560 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14561 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14562 | else |
be2daae6 | 14563 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14564 | } |
14565 | ||
9c6a1327 TT |
14566 | /* A convenience typedef that's used when finding the discriminant |
14567 | field for a variant part. */ | |
1b95cdb7 SM |
14568 | typedef std::unordered_map<sect_offset, int, gdb::hash_enum<sect_offset>> |
14569 | offset_map_type; | |
9c6a1327 TT |
14570 | |
14571 | /* Compute the discriminant range for a given variant. OBSTACK is | |
14572 | where the results will be stored. VARIANT is the variant to | |
14573 | process. IS_UNSIGNED indicates whether the discriminant is signed | |
14574 | or unsigned. */ | |
14575 | ||
14576 | static const gdb::array_view<discriminant_range> | |
14577 | convert_variant_range (struct obstack *obstack, const variant_field &variant, | |
14578 | bool is_unsigned) | |
14579 | { | |
14580 | std::vector<discriminant_range> ranges; | |
14581 | ||
14582 | if (variant.default_branch) | |
14583 | return {}; | |
14584 | ||
14585 | if (variant.discr_list_data == nullptr) | |
14586 | { | |
14587 | discriminant_range r | |
14588 | = {variant.discriminant_value, variant.discriminant_value}; | |
14589 | ranges.push_back (r); | |
14590 | } | |
14591 | else | |
14592 | { | |
14593 | gdb::array_view<const gdb_byte> data (variant.discr_list_data->data, | |
14594 | variant.discr_list_data->size); | |
14595 | while (!data.empty ()) | |
14596 | { | |
14597 | if (data[0] != DW_DSC_range && data[0] != DW_DSC_label) | |
14598 | { | |
14599 | complaint (_("invalid discriminant marker: %d"), data[0]); | |
14600 | break; | |
14601 | } | |
14602 | bool is_range = data[0] == DW_DSC_range; | |
14603 | data = data.slice (1); | |
14604 | ||
14605 | ULONGEST low, high; | |
14606 | unsigned int bytes_read; | |
14607 | ||
14608 | if (data.empty ()) | |
14609 | { | |
14610 | complaint (_("DW_AT_discr_list missing low value")); | |
14611 | break; | |
14612 | } | |
14613 | if (is_unsigned) | |
14614 | low = read_unsigned_leb128 (nullptr, data.data (), &bytes_read); | |
14615 | else | |
14616 | low = (ULONGEST) read_signed_leb128 (nullptr, data.data (), | |
14617 | &bytes_read); | |
14618 | data = data.slice (bytes_read); | |
14619 | ||
14620 | if (is_range) | |
14621 | { | |
14622 | if (data.empty ()) | |
14623 | { | |
14624 | complaint (_("DW_AT_discr_list missing high value")); | |
14625 | break; | |
14626 | } | |
14627 | if (is_unsigned) | |
14628 | high = read_unsigned_leb128 (nullptr, data.data (), | |
14629 | &bytes_read); | |
14630 | else | |
14631 | high = (LONGEST) read_signed_leb128 (nullptr, data.data (), | |
14632 | &bytes_read); | |
14633 | data = data.slice (bytes_read); | |
14634 | } | |
14635 | else | |
14636 | high = low; | |
14637 | ||
14638 | ranges.push_back ({ low, high }); | |
14639 | } | |
14640 | } | |
14641 | ||
14642 | discriminant_range *result = XOBNEWVEC (obstack, discriminant_range, | |
14643 | ranges.size ()); | |
14644 | std::copy (ranges.begin (), ranges.end (), result); | |
14645 | return gdb::array_view<discriminant_range> (result, ranges.size ()); | |
14646 | } | |
14647 | ||
14648 | static const gdb::array_view<variant_part> create_variant_parts | |
14649 | (struct obstack *obstack, | |
14650 | const offset_map_type &offset_map, | |
14651 | struct field_info *fi, | |
14652 | const std::vector<variant_part_builder> &variant_parts); | |
14653 | ||
14654 | /* Fill in a "struct variant" for a given variant field. RESULT is | |
14655 | the variant to fill in. OBSTACK is where any needed allocations | |
14656 | will be done. OFFSET_MAP holds the mapping from section offsets to | |
14657 | fields for the type. FI describes the fields of the type we're | |
14658 | processing. FIELD is the variant field we're converting. */ | |
14659 | ||
14660 | static void | |
14661 | create_one_variant (variant &result, struct obstack *obstack, | |
14662 | const offset_map_type &offset_map, | |
14663 | struct field_info *fi, const variant_field &field) | |
14664 | { | |
14665 | result.discriminants = convert_variant_range (obstack, field, false); | |
14666 | result.first_field = field.first_field + fi->baseclasses.size (); | |
14667 | result.last_field = field.last_field + fi->baseclasses.size (); | |
14668 | result.parts = create_variant_parts (obstack, offset_map, fi, | |
14669 | field.variant_parts); | |
14670 | } | |
14671 | ||
14672 | /* Fill in a "struct variant_part" for a given variant part. RESULT | |
14673 | is the variant part to fill in. OBSTACK is where any needed | |
14674 | allocations will be done. OFFSET_MAP holds the mapping from | |
14675 | section offsets to fields for the type. FI describes the fields of | |
14676 | the type we're processing. BUILDER is the variant part to be | |
14677 | converted. */ | |
14678 | ||
14679 | static void | |
14680 | create_one_variant_part (variant_part &result, | |
14681 | struct obstack *obstack, | |
14682 | const offset_map_type &offset_map, | |
14683 | struct field_info *fi, | |
14684 | const variant_part_builder &builder) | |
14685 | { | |
14686 | auto iter = offset_map.find (builder.discriminant_offset); | |
14687 | if (iter == offset_map.end ()) | |
14688 | { | |
14689 | result.discriminant_index = -1; | |
14690 | /* Doesn't matter. */ | |
14691 | result.is_unsigned = false; | |
14692 | } | |
14693 | else | |
14694 | { | |
14695 | result.discriminant_index = iter->second; | |
14696 | result.is_unsigned | |
14697 | = TYPE_UNSIGNED (FIELD_TYPE | |
14698 | (fi->fields[result.discriminant_index].field)); | |
14699 | } | |
14700 | ||
14701 | size_t n = builder.variants.size (); | |
14702 | variant *output = new (obstack) variant[n]; | |
14703 | for (size_t i = 0; i < n; ++i) | |
14704 | create_one_variant (output[i], obstack, offset_map, fi, | |
14705 | builder.variants[i]); | |
14706 | ||
14707 | result.variants = gdb::array_view<variant> (output, n); | |
14708 | } | |
14709 | ||
14710 | /* Create a vector of variant parts that can be attached to a type. | |
14711 | OBSTACK is where any needed allocations will be done. OFFSET_MAP | |
14712 | holds the mapping from section offsets to fields for the type. FI | |
14713 | describes the fields of the type we're processing. VARIANT_PARTS | |
14714 | is the vector to convert. */ | |
14715 | ||
14716 | static const gdb::array_view<variant_part> | |
14717 | create_variant_parts (struct obstack *obstack, | |
14718 | const offset_map_type &offset_map, | |
14719 | struct field_info *fi, | |
14720 | const std::vector<variant_part_builder> &variant_parts) | |
14721 | { | |
14722 | if (variant_parts.empty ()) | |
14723 | return {}; | |
14724 | ||
14725 | size_t n = variant_parts.size (); | |
14726 | variant_part *result = new (obstack) variant_part[n]; | |
14727 | for (size_t i = 0; i < n; ++i) | |
14728 | create_one_variant_part (result[i], obstack, offset_map, fi, | |
14729 | variant_parts[i]); | |
14730 | ||
14731 | return gdb::array_view<variant_part> (result, n); | |
14732 | } | |
14733 | ||
14734 | /* Compute the variant part vector for FIP, attaching it to TYPE when | |
14735 | done. */ | |
14736 | ||
14737 | static void | |
14738 | add_variant_property (struct field_info *fip, struct type *type, | |
14739 | struct dwarf2_cu *cu) | |
14740 | { | |
14741 | /* Map section offsets of fields to their field index. Note the | |
14742 | field index here does not take the number of baseclasses into | |
14743 | account. */ | |
14744 | offset_map_type offset_map; | |
14745 | for (int i = 0; i < fip->fields.size (); ++i) | |
14746 | offset_map[fip->fields[i].offset] = i; | |
14747 | ||
14748 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; | |
14749 | gdb::array_view<variant_part> parts | |
14750 | = create_variant_parts (&objfile->objfile_obstack, offset_map, fip, | |
14751 | fip->variant_parts); | |
14752 | ||
14753 | struct dynamic_prop prop; | |
14754 | prop.kind = PROP_VARIANT_PARTS; | |
14755 | prop.data.variant_parts | |
14756 | = ((gdb::array_view<variant_part> *) | |
14757 | obstack_copy (&objfile->objfile_obstack, &parts, sizeof (parts))); | |
14758 | ||
5c54719c | 14759 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
9c6a1327 TT |
14760 | } |
14761 | ||
c906108c SS |
14762 | /* Create the vector of fields, and attach it to the type. */ |
14763 | ||
14764 | static void | |
fba45db2 | 14765 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14766 | struct dwarf2_cu *cu) |
c906108c | 14767 | { |
317f7127 | 14768 | int nfields = fip->nfields (); |
c906108c SS |
14769 | |
14770 | /* Record the field count, allocate space for the array of fields, | |
14771 | and create blank accessibility bitfields if necessary. */ | |
14772 | TYPE_NFIELDS (type) = nfields; | |
14773 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 14774 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 14775 | |
b4ba55a1 | 14776 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14777 | { |
14778 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14779 | ||
14780 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14781 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14782 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14783 | ||
14784 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14785 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14786 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14787 | ||
774b6a14 TT |
14788 | TYPE_FIELD_IGNORE_BITS (type) = |
14789 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14790 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14791 | } |
14792 | ||
14793 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14794 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14795 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14796 | { |
be2daae6 | 14797 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14798 | unsigned char *pointer; |
c906108c SS |
14799 | |
14800 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14801 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14802 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14803 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14804 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14805 | } |
14806 | ||
9c6a1327 TT |
14807 | if (!fip->variant_parts.empty ()) |
14808 | add_variant_property (fip, type, cu); | |
2ddeaf8a | 14809 | |
be2daae6 TT |
14810 | /* Copy the saved-up fields into the field vector. */ |
14811 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14812 | { |
be2daae6 TT |
14813 | struct nextfield &field |
14814 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14815 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14816 | |
be2daae6 TT |
14817 | TYPE_FIELD (type, i) = field.field; |
14818 | switch (field.accessibility) | |
c906108c | 14819 | { |
c5aa993b | 14820 | case DW_ACCESS_private: |
b4ba55a1 | 14821 | if (cu->language != language_ada) |
be2daae6 | 14822 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14823 | break; |
c906108c | 14824 | |
c5aa993b | 14825 | case DW_ACCESS_protected: |
b4ba55a1 | 14826 | if (cu->language != language_ada) |
be2daae6 | 14827 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14828 | break; |
c906108c | 14829 | |
c5aa993b JM |
14830 | case DW_ACCESS_public: |
14831 | break; | |
c906108c | 14832 | |
c5aa993b JM |
14833 | default: |
14834 | /* Unknown accessibility. Complain and treat it as public. */ | |
14835 | { | |
b98664d3 | 14836 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14837 | field.accessibility); |
c5aa993b JM |
14838 | } |
14839 | break; | |
c906108c | 14840 | } |
be2daae6 | 14841 | if (i < fip->baseclasses.size ()) |
c906108c | 14842 | { |
be2daae6 | 14843 | switch (field.virtuality) |
c906108c | 14844 | { |
c5aa993b JM |
14845 | case DW_VIRTUALITY_virtual: |
14846 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14847 | if (cu->language == language_ada) |
a73c6dcd | 14848 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14849 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14850 | break; |
c906108c SS |
14851 | } |
14852 | } | |
c906108c SS |
14853 | } |
14854 | } | |
14855 | ||
7d27a96d TT |
14856 | /* Return true if this member function is a constructor, false |
14857 | otherwise. */ | |
14858 | ||
14859 | static int | |
14860 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14861 | { | |
14862 | const char *fieldname; | |
fe978cb0 | 14863 | const char *type_name; |
7d27a96d TT |
14864 | int len; |
14865 | ||
14866 | if (die->parent == NULL) | |
14867 | return 0; | |
14868 | ||
14869 | if (die->parent->tag != DW_TAG_structure_type | |
14870 | && die->parent->tag != DW_TAG_union_type | |
14871 | && die->parent->tag != DW_TAG_class_type) | |
14872 | return 0; | |
14873 | ||
14874 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14875 | type_name = dwarf2_name (die->parent, cu); |
14876 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14877 | return 0; |
14878 | ||
14879 | len = strlen (fieldname); | |
fe978cb0 PA |
14880 | return (strncmp (fieldname, type_name, len) == 0 |
14881 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14882 | } |
14883 | ||
e35000a7 TBA |
14884 | /* Check if the given VALUE is a recognized enum |
14885 | dwarf_defaulted_attribute constant according to DWARF5 spec, | |
14886 | Table 7.24. */ | |
14887 | ||
14888 | static bool | |
14889 | is_valid_DW_AT_defaulted (ULONGEST value) | |
14890 | { | |
14891 | switch (value) | |
14892 | { | |
14893 | case DW_DEFAULTED_no: | |
14894 | case DW_DEFAULTED_in_class: | |
14895 | case DW_DEFAULTED_out_of_class: | |
14896 | return true; | |
14897 | } | |
14898 | ||
3142e908 | 14899 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
e35000a7 TBA |
14900 | return false; |
14901 | } | |
14902 | ||
c906108c SS |
14903 | /* Add a member function to the proper fieldlist. */ |
14904 | ||
14905 | static void | |
107d2387 | 14906 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14907 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14908 | { |
518817b3 | 14909 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 14910 | struct attribute *attr; |
c906108c | 14911 | int i; |
be2daae6 | 14912 | struct fnfieldlist *flp = nullptr; |
c906108c | 14913 | struct fn_field *fnp; |
15d034d0 | 14914 | const char *fieldname; |
f792889a | 14915 | struct type *this_type; |
60d5a603 | 14916 | enum dwarf_access_attribute accessibility; |
c906108c | 14917 | |
b4ba55a1 | 14918 | if (cu->language == language_ada) |
a73c6dcd | 14919 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14920 | |
2df3850c | 14921 | /* Get name of member function. */ |
39cbfefa DJ |
14922 | fieldname = dwarf2_name (die, cu); |
14923 | if (fieldname == NULL) | |
2df3850c | 14924 | return; |
c906108c | 14925 | |
c906108c | 14926 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14927 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14928 | { |
27bfe10e | 14929 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14930 | { |
14931 | flp = &fip->fnfieldlists[i]; | |
14932 | break; | |
14933 | } | |
c906108c SS |
14934 | } |
14935 | ||
be2daae6 TT |
14936 | /* Create a new fnfieldlist if necessary. */ |
14937 | if (flp == nullptr) | |
c906108c | 14938 | { |
be2daae6 TT |
14939 | fip->fnfieldlists.emplace_back (); |
14940 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14941 | flp->name = fieldname; |
be2daae6 | 14942 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14943 | } |
14944 | ||
be2daae6 TT |
14945 | /* Create a new member function field and add it to the vector of |
14946 | fnfieldlists. */ | |
14947 | flp->fnfields.emplace_back (); | |
14948 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14949 | |
14950 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14951 | if (cu->language == language_cplus) |
be2daae6 TT |
14952 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
14953 | die, cu); | |
3da10d80 KS |
14954 | else |
14955 | { | |
1d06ead6 | 14956 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14957 | fnp->physname = physname ? physname : ""; |
14958 | } | |
14959 | ||
c906108c | 14960 | fnp->type = alloc_type (objfile); |
f792889a | 14961 | this_type = read_type_die (die, cu); |
78134374 | 14962 | if (this_type && this_type->code () == TYPE_CODE_FUNC) |
c906108c | 14963 | { |
f792889a | 14964 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14965 | |
f792889a | 14966 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14967 | of the method itself (TYPE_CODE_METHOD). */ |
14968 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14969 | TYPE_TARGET_TYPE (this_type), |
14970 | TYPE_FIELDS (this_type), | |
14971 | TYPE_NFIELDS (this_type), | |
14972 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14973 | |
14974 | /* Handle static member functions. | |
c5aa993b | 14975 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14976 | member functions. G++ helps GDB by marking the first |
14977 | parameter for non-static member functions (which is the this | |
14978 | pointer) as artificial. We obtain this information from | |
14979 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14980 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14981 | fnp->voffset = VOFFSET_STATIC; |
14982 | } | |
14983 | else | |
b98664d3 | 14984 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 14985 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14986 | |
14987 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14988 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14989 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14990 | |
3e43a32a MS |
14991 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14992 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14993 | |
14994 | /* Get accessibility. */ | |
e142c38c | 14995 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14996 | if (attr != nullptr) |
aead7601 | 14997 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14998 | else |
14999 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15000 | switch (accessibility) | |
c906108c | 15001 | { |
60d5a603 JK |
15002 | case DW_ACCESS_private: |
15003 | fnp->is_private = 1; | |
15004 | break; | |
15005 | case DW_ACCESS_protected: | |
15006 | fnp->is_protected = 1; | |
15007 | break; | |
c906108c SS |
15008 | } |
15009 | ||
b02dede2 | 15010 | /* Check for artificial methods. */ |
e142c38c | 15011 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15012 | if (attr && DW_UNSND (attr) != 0) |
15013 | fnp->is_artificial = 1; | |
15014 | ||
e35000a7 TBA |
15015 | /* Check for defaulted methods. */ |
15016 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
15017 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) | |
15018 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); | |
15019 | ||
15020 | /* Check for deleted methods. */ | |
15021 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
15022 | if (attr != nullptr && DW_UNSND (attr) != 0) | |
15023 | fnp->is_deleted = 1; | |
15024 | ||
7d27a96d TT |
15025 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15026 | ||
0d564a31 | 15027 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15028 | function. For older versions of GCC, this is an offset in the |
15029 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15030 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15031 | to the object address. */ |
15032 | ||
e142c38c | 15033 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 15034 | if (attr != nullptr) |
8e19ed76 | 15035 | { |
4fc6c0d5 | 15036 | if (attr->form_is_block () && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15037 | { |
aec5aa8b TT |
15038 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15039 | { | |
15040 | /* Old-style GCC. */ | |
15041 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15042 | } | |
15043 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15044 | || (DW_BLOCK (attr)->size > 1 | |
15045 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15046 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15047 | { | |
aec5aa8b TT |
15048 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15049 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15050 | dwarf2_complex_location_expr_complaint (); | |
15051 | else | |
15052 | fnp->voffset /= cu->header.addr_size; | |
15053 | fnp->voffset += 2; | |
15054 | } | |
15055 | else | |
15056 | dwarf2_complex_location_expr_complaint (); | |
15057 | ||
15058 | if (!fnp->fcontext) | |
7e993ebf KS |
15059 | { |
15060 | /* If there is no `this' field and no DW_AT_containing_type, | |
15061 | we cannot actually find a base class context for the | |
15062 | vtable! */ | |
15063 | if (TYPE_NFIELDS (this_type) == 0 | |
15064 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15065 | { | |
b98664d3 | 15066 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15067 | "function \"%s\" (offset %s)"), |
15068 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15069 | } |
15070 | else | |
15071 | { | |
15072 | fnp->fcontext | |
15073 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15074 | } | |
15075 | } | |
aec5aa8b | 15076 | } |
cd6c91b4 | 15077 | else if (attr->form_is_section_offset ()) |
8e19ed76 | 15078 | { |
4d3c2250 | 15079 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15080 | } |
15081 | else | |
15082 | { | |
4d3c2250 KB |
15083 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15084 | fieldname); | |
8e19ed76 | 15085 | } |
0d564a31 | 15086 | } |
d48cc9dd DJ |
15087 | else |
15088 | { | |
15089 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15090 | if (attr && DW_UNSND (attr)) | |
15091 | { | |
15092 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15093 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15094 | "but the vtable offset is not specified"), |
9d8780f0 | 15095 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15096 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15097 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15098 | } | |
15099 | } | |
c906108c SS |
15100 | } |
15101 | ||
15102 | /* Create the vector of member function fields, and attach it to the type. */ | |
15103 | ||
15104 | static void | |
fba45db2 | 15105 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15106 | struct dwarf2_cu *cu) |
c906108c | 15107 | { |
b4ba55a1 | 15108 | if (cu->language == language_ada) |
a73c6dcd | 15109 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15110 | |
c906108c SS |
15111 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15112 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15113 | TYPE_ALLOC (type, |
15114 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15115 | |
be2daae6 | 15116 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15117 | { |
be2daae6 | 15118 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15119 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15120 | |
be2daae6 TT |
15121 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15122 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15123 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15124 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15125 | ||
15126 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15127 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15128 | } |
15129 | ||
be2daae6 | 15130 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15131 | } |
15132 | ||
1168df01 JB |
15133 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15134 | language, zero otherwise. */ | |
15135 | static int | |
15136 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15137 | { | |
15138 | static const char vptr[] = "_vptr"; | |
15139 | ||
9c37b5ae TT |
15140 | /* Look for the C++ form of the vtable. */ |
15141 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15142 | return 1; |
15143 | ||
15144 | return 0; | |
15145 | } | |
15146 | ||
c0dd20ea | 15147 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15148 | functions, with the ABI-specified layout. If TYPE describes |
15149 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15150 | |
15151 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15152 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15153 | |
0b92b5bb TT |
15154 | static void |
15155 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15156 | { |
09e2d7c7 | 15157 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15158 | |
15159 | /* Check for a structure with no name and two children. */ | |
78134374 | 15160 | if (type->code () != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
0b92b5bb | 15161 | return; |
c0dd20ea DJ |
15162 | |
15163 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15164 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15165 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15166 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15167 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15168 | return; | |
c0dd20ea DJ |
15169 | |
15170 | /* Find the type of the method. */ | |
0b92b5bb | 15171 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea | 15172 | if (pfn_type == NULL |
78134374 SM |
15173 | || pfn_type->code () != TYPE_CODE_PTR |
15174 | || TYPE_TARGET_TYPE (pfn_type)->code () != TYPE_CODE_FUNC) | |
0b92b5bb | 15175 | return; |
c0dd20ea DJ |
15176 | |
15177 | /* Look for the "this" argument. */ | |
15178 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15179 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15180 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
78134374 | 15181 | || TYPE_FIELD_TYPE (pfn_type, 0)->code () != TYPE_CODE_PTR) |
0b92b5bb | 15182 | return; |
c0dd20ea | 15183 | |
09e2d7c7 | 15184 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15185 | new_type = alloc_type (objfile); |
09e2d7c7 | 15186 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15187 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15188 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15189 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15190 | } |
1168df01 | 15191 | |
2b4424c3 TT |
15192 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15193 | appropriate error checking and issuing complaints if there is a | |
15194 | problem. */ | |
15195 | ||
15196 | static ULONGEST | |
15197 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15198 | { | |
15199 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15200 | ||
15201 | if (attr == nullptr) | |
15202 | return 0; | |
15203 | ||
cd6c91b4 | 15204 | if (!attr->form_is_constant ()) |
2b4424c3 | 15205 | { |
b98664d3 | 15206 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15207 | " - DIE at %s [in module %s]"), |
15208 | sect_offset_str (die->sect_off), | |
15209 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15210 | return 0; | |
15211 | } | |
15212 | ||
15213 | ULONGEST align; | |
15214 | if (attr->form == DW_FORM_sdata) | |
15215 | { | |
15216 | LONGEST val = DW_SND (attr); | |
15217 | if (val < 0) | |
15218 | { | |
b98664d3 | 15219 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
15220 | " - DIE at %s [in module %s]"), |
15221 | sect_offset_str (die->sect_off), | |
15222 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15223 | return 0; | |
15224 | } | |
15225 | align = val; | |
15226 | } | |
15227 | else | |
15228 | align = DW_UNSND (attr); | |
15229 | ||
15230 | if (align == 0) | |
15231 | { | |
b98664d3 | 15232 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15233 | " - DIE at %s [in module %s]"), |
15234 | sect_offset_str (die->sect_off), | |
15235 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15236 | return 0; | |
15237 | } | |
15238 | if ((align & (align - 1)) != 0) | |
15239 | { | |
b98664d3 | 15240 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15241 | " - DIE at %s [in module %s]"), |
15242 | sect_offset_str (die->sect_off), | |
15243 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15244 | return 0; | |
15245 | } | |
15246 | ||
15247 | return align; | |
15248 | } | |
15249 | ||
15250 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15251 | the alignment for TYPE. */ | |
15252 | ||
15253 | static void | |
15254 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15255 | struct type *type) | |
15256 | { | |
15257 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15258 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15259 | " - DIE at %s [in module %s]"), |
15260 | sect_offset_str (die->sect_off), | |
15261 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15262 | } | |
685b1105 | 15263 | |
e35000a7 TBA |
15264 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15265 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
15266 | ||
15267 | static bool | |
15268 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
15269 | { | |
15270 | switch (value) | |
15271 | { | |
15272 | case DW_CC_normal: | |
15273 | case DW_CC_pass_by_reference: | |
15274 | case DW_CC_pass_by_value: | |
15275 | return true; | |
15276 | ||
15277 | default: | |
15278 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15279 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
15280 | return false; |
15281 | } | |
15282 | } | |
15283 | ||
d0922fcf TBA |
15284 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15285 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
15286 | also according to GNU-specific values (see include/dwarf2.h). */ | |
15287 | ||
15288 | static bool | |
15289 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15290 | { | |
15291 | switch (value) | |
15292 | { | |
15293 | case DW_CC_normal: | |
15294 | case DW_CC_program: | |
15295 | case DW_CC_nocall: | |
15296 | return true; | |
15297 | ||
15298 | case DW_CC_GNU_renesas_sh: | |
15299 | case DW_CC_GNU_borland_fastcall_i386: | |
15300 | case DW_CC_GDB_IBM_OpenCL: | |
15301 | return true; | |
15302 | ||
15303 | default: | |
15304 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15305 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15306 | return false; |
15307 | } | |
15308 | } | |
15309 | ||
c906108c | 15310 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15311 | (definition) to create a type for the structure or union. Fill in |
15312 | the type's name and general properties; the members will not be | |
83655187 DE |
15313 | processed until process_structure_scope. A symbol table entry for |
15314 | the type will also not be done until process_structure_scope (assuming | |
15315 | the type has a name). | |
c906108c | 15316 | |
c767944b DJ |
15317 | NOTE: we need to call these functions regardless of whether or not the |
15318 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15319 | structure or union. This gets the type entered into our set of |
83655187 | 15320 | user defined types. */ |
c906108c | 15321 | |
f792889a | 15322 | static struct type * |
134d01f1 | 15323 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15324 | { |
518817b3 | 15325 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15326 | struct type *type; |
15327 | struct attribute *attr; | |
15d034d0 | 15328 | const char *name; |
c906108c | 15329 | |
348e048f DE |
15330 | /* If the definition of this type lives in .debug_types, read that type. |
15331 | Don't follow DW_AT_specification though, that will take us back up | |
15332 | the chain and we want to go down. */ | |
052c8bb8 | 15333 | attr = die->attr (DW_AT_signature); |
435d3d88 | 15334 | if (attr != nullptr) |
348e048f | 15335 | { |
ac9ec31b | 15336 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15337 | |
ac9ec31b | 15338 | /* The type's CU may not be the same as CU. |
02142a6c | 15339 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15340 | return set_die_type (die, type, cu); |
15341 | } | |
15342 | ||
c0dd20ea | 15343 | type = alloc_type (objfile); |
c906108c | 15344 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15345 | |
39cbfefa DJ |
15346 | name = dwarf2_name (die, cu); |
15347 | if (name != NULL) | |
c906108c | 15348 | { |
987504bb | 15349 | if (cu->language == language_cplus |
c44af4eb TT |
15350 | || cu->language == language_d |
15351 | || cu->language == language_rust) | |
63d06c5c | 15352 | { |
15d034d0 | 15353 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15354 | |
15355 | /* dwarf2_full_name might have already finished building the DIE's | |
15356 | type. If so, there is no need to continue. */ | |
15357 | if (get_die_type (die, cu) != NULL) | |
15358 | return get_die_type (die, cu); | |
15359 | ||
e86ca25f | 15360 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15361 | } |
15362 | else | |
15363 | { | |
d8151005 DJ |
15364 | /* The name is already allocated along with this objfile, so |
15365 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15366 | TYPE_NAME (type) = name; |
63d06c5c | 15367 | } |
c906108c SS |
15368 | } |
15369 | ||
15370 | if (die->tag == DW_TAG_structure_type) | |
15371 | { | |
67607e24 | 15372 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15373 | } |
15374 | else if (die->tag == DW_TAG_union_type) | |
15375 | { | |
67607e24 | 15376 | type->set_code (TYPE_CODE_UNION); |
c906108c SS |
15377 | } |
15378 | else | |
15379 | { | |
67607e24 | 15380 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15381 | } |
15382 | ||
0cc2414c TT |
15383 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15384 | TYPE_DECLARED_CLASS (type) = 1; | |
15385 | ||
e35000a7 TBA |
15386 | /* Store the calling convention in the type if it's available in |
15387 | the die. Otherwise the calling convention remains set to | |
15388 | the default value DW_CC_normal. */ | |
15389 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15390 | if (attr != nullptr | |
15391 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) | |
15392 | { | |
15393 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15394 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
15395 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
15396 | } | |
15397 | ||
e142c38c | 15398 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15399 | if (attr != nullptr) |
c906108c | 15400 | { |
cd6c91b4 | 15401 | if (attr->form_is_constant ()) |
155bfbd3 JB |
15402 | TYPE_LENGTH (type) = DW_UNSND (attr); |
15403 | else | |
15404 | { | |
f8e89861 TT |
15405 | struct dynamic_prop prop; |
15406 | if (attr_to_dynamic_prop (attr, die, cu, &prop, | |
15407 | cu->per_cu->addr_type ())) | |
5c54719c | 15408 | type->add_dyn_prop (DYN_PROP_BYTE_SIZE, prop); |
155bfbd3 JB |
15409 | TYPE_LENGTH (type) = 0; |
15410 | } | |
c906108c SS |
15411 | } |
15412 | else | |
15413 | { | |
15414 | TYPE_LENGTH (type) = 0; | |
15415 | } | |
15416 | ||
2b4424c3 TT |
15417 | maybe_set_alignment (cu, die, type); |
15418 | ||
5230b05a | 15419 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15420 | { |
5230b05a WT |
15421 | /* ICC<14 does not output the required DW_AT_declaration on |
15422 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15423 | TYPE_STUB (type) = 1; |
685b1105 JK |
15424 | } |
15425 | else | |
15426 | TYPE_STUB_SUPPORTED (type) = 1; | |
15427 | ||
dc718098 | 15428 | if (die_is_declaration (die, cu)) |
876cecd0 | 15429 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15430 | else if (attr == NULL && die->child == NULL |
15431 | && producer_is_realview (cu->producer)) | |
15432 | /* RealView does not output the required DW_AT_declaration | |
15433 | on incomplete types. */ | |
15434 | TYPE_STUB (type) = 1; | |
dc718098 | 15435 | |
c906108c SS |
15436 | /* We need to add the type field to the die immediately so we don't |
15437 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15438 | type within the structure itself. */ |
1c379e20 | 15439 | set_die_type (die, type, cu); |
c906108c | 15440 | |
7e314c57 JK |
15441 | /* set_die_type should be already done. */ |
15442 | set_descriptive_type (type, die, cu); | |
15443 | ||
c767944b DJ |
15444 | return type; |
15445 | } | |
15446 | ||
9c6a1327 TT |
15447 | static void handle_struct_member_die |
15448 | (struct die_info *child_die, | |
15449 | struct type *type, | |
15450 | struct field_info *fi, | |
15451 | std::vector<struct symbol *> *template_args, | |
15452 | struct dwarf2_cu *cu); | |
15453 | ||
15454 | /* A helper for handle_struct_member_die that handles | |
15455 | DW_TAG_variant_part. */ | |
15456 | ||
15457 | static void | |
15458 | handle_variant_part (struct die_info *die, struct type *type, | |
15459 | struct field_info *fi, | |
15460 | std::vector<struct symbol *> *template_args, | |
15461 | struct dwarf2_cu *cu) | |
15462 | { | |
15463 | variant_part_builder *new_part; | |
15464 | if (fi->current_variant_part == nullptr) | |
15465 | { | |
15466 | fi->variant_parts.emplace_back (); | |
15467 | new_part = &fi->variant_parts.back (); | |
15468 | } | |
15469 | else if (!fi->current_variant_part->processing_variant) | |
15470 | { | |
15471 | complaint (_("nested DW_TAG_variant_part seen " | |
15472 | "- DIE at %s [in module %s]"), | |
15473 | sect_offset_str (die->sect_off), | |
15474 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15475 | return; | |
15476 | } | |
15477 | else | |
15478 | { | |
15479 | variant_field ¤t = fi->current_variant_part->variants.back (); | |
15480 | current.variant_parts.emplace_back (); | |
15481 | new_part = ¤t.variant_parts.back (); | |
15482 | } | |
15483 | ||
15484 | /* When we recurse, we want callees to add to this new variant | |
15485 | part. */ | |
15486 | scoped_restore save_current_variant_part | |
15487 | = make_scoped_restore (&fi->current_variant_part, new_part); | |
15488 | ||
15489 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15490 | if (discr == NULL) | |
15491 | { | |
15492 | /* It's a univariant form, an extension we support. */ | |
15493 | } | |
15494 | else if (discr->form_is_ref ()) | |
15495 | { | |
15496 | struct dwarf2_cu *target_cu = cu; | |
15497 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15498 | ||
15499 | new_part->discriminant_offset = target_die->sect_off; | |
15500 | } | |
15501 | else | |
15502 | { | |
15503 | complaint (_("DW_AT_discr does not have DIE reference form" | |
15504 | " - DIE at %s [in module %s]"), | |
15505 | sect_offset_str (die->sect_off), | |
15506 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15507 | } | |
15508 | ||
15509 | for (die_info *child_die = die->child; | |
15510 | child_die != NULL; | |
15511 | child_die = child_die->sibling) | |
15512 | handle_struct_member_die (child_die, type, fi, template_args, cu); | |
15513 | } | |
15514 | ||
15515 | /* A helper for handle_struct_member_die that handles | |
15516 | DW_TAG_variant. */ | |
15517 | ||
15518 | static void | |
15519 | handle_variant (struct die_info *die, struct type *type, | |
15520 | struct field_info *fi, | |
15521 | std::vector<struct symbol *> *template_args, | |
15522 | struct dwarf2_cu *cu) | |
15523 | { | |
15524 | if (fi->current_variant_part == nullptr) | |
15525 | { | |
15526 | complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part " | |
15527 | "- DIE at %s [in module %s]"), | |
15528 | sect_offset_str (die->sect_off), | |
15529 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15530 | return; | |
15531 | } | |
15532 | if (fi->current_variant_part->processing_variant) | |
15533 | { | |
15534 | complaint (_("nested DW_TAG_variant seen " | |
15535 | "- DIE at %s [in module %s]"), | |
15536 | sect_offset_str (die->sect_off), | |
15537 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15538 | return; | |
15539 | } | |
15540 | ||
15541 | scoped_restore save_processing_variant | |
15542 | = make_scoped_restore (&fi->current_variant_part->processing_variant, | |
15543 | true); | |
15544 | ||
15545 | fi->current_variant_part->variants.emplace_back (); | |
15546 | variant_field &variant = fi->current_variant_part->variants.back (); | |
15547 | variant.first_field = fi->fields.size (); | |
15548 | ||
15549 | /* In a variant we want to get the discriminant and also add a | |
15550 | field for our sole member child. */ | |
15551 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr_value, cu); | |
15552 | if (discr == nullptr) | |
15553 | { | |
15554 | discr = dwarf2_attr (die, DW_AT_discr_list, cu); | |
15555 | if (discr == nullptr || DW_BLOCK (discr)->size == 0) | |
15556 | variant.default_branch = true; | |
15557 | else | |
15558 | variant.discr_list_data = DW_BLOCK (discr); | |
15559 | } | |
15560 | else | |
15561 | variant.discriminant_value = DW_UNSND (discr); | |
15562 | ||
15563 | for (die_info *variant_child = die->child; | |
15564 | variant_child != NULL; | |
15565 | variant_child = variant_child->sibling) | |
15566 | handle_struct_member_die (variant_child, type, fi, template_args, cu); | |
15567 | ||
15568 | variant.last_field = fi->fields.size (); | |
15569 | } | |
15570 | ||
2ddeaf8a TT |
15571 | /* A helper for process_structure_scope that handles a single member |
15572 | DIE. */ | |
15573 | ||
15574 | static void | |
15575 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15576 | struct field_info *fi, | |
15577 | std::vector<struct symbol *> *template_args, | |
15578 | struct dwarf2_cu *cu) | |
15579 | { | |
15580 | if (child_die->tag == DW_TAG_member | |
9c6a1327 | 15581 | || child_die->tag == DW_TAG_variable) |
2ddeaf8a TT |
15582 | { |
15583 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15584 | should be a DW_TAG_member that is a declaration, but | |
15585 | all versions of G++ as of this writing (so through at | |
15586 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15587 | tags for them instead. */ | |
15588 | dwarf2_add_field (fi, child_die, cu); | |
15589 | } | |
15590 | else if (child_die->tag == DW_TAG_subprogram) | |
15591 | { | |
15592 | /* Rust doesn't have member functions in the C++ sense. | |
15593 | However, it does emit ordinary functions as children | |
15594 | of a struct DIE. */ | |
15595 | if (cu->language == language_rust) | |
15596 | read_func_scope (child_die, cu); | |
15597 | else | |
15598 | { | |
15599 | /* C++ member function. */ | |
15600 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15601 | } | |
15602 | } | |
15603 | else if (child_die->tag == DW_TAG_inheritance) | |
15604 | { | |
15605 | /* C++ base class field. */ | |
15606 | dwarf2_add_field (fi, child_die, cu); | |
15607 | } | |
15608 | else if (type_can_define_types (child_die)) | |
15609 | dwarf2_add_type_defn (fi, child_die, cu); | |
15610 | else if (child_die->tag == DW_TAG_template_type_param | |
15611 | || child_die->tag == DW_TAG_template_value_param) | |
15612 | { | |
15613 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15614 | ||
15615 | if (arg != NULL) | |
15616 | template_args->push_back (arg); | |
15617 | } | |
9c6a1327 TT |
15618 | else if (child_die->tag == DW_TAG_variant_part) |
15619 | handle_variant_part (child_die, type, fi, template_args, cu); | |
2ddeaf8a | 15620 | else if (child_die->tag == DW_TAG_variant) |
9c6a1327 | 15621 | handle_variant (child_die, type, fi, template_args, cu); |
2ddeaf8a TT |
15622 | } |
15623 | ||
c767944b DJ |
15624 | /* Finish creating a structure or union type, including filling in |
15625 | its members and creating a symbol for it. */ | |
15626 | ||
15627 | static void | |
15628 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15629 | { | |
518817b3 | 15630 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15631 | struct die_info *child_die; |
c767944b DJ |
15632 | struct type *type; |
15633 | ||
15634 | type = get_die_type (die, cu); | |
15635 | if (type == NULL) | |
15636 | type = read_structure_type (die, cu); | |
15637 | ||
3e1d3d8c | 15638 | bool has_template_parameters = false; |
e142c38c | 15639 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15640 | { |
15641 | struct field_info fi; | |
2f4732b0 | 15642 | std::vector<struct symbol *> template_args; |
c906108c | 15643 | |
639d11d3 | 15644 | child_die = die->child; |
c906108c SS |
15645 | |
15646 | while (child_die && child_die->tag) | |
15647 | { | |
2ddeaf8a | 15648 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
436c571c | 15649 | child_die = child_die->sibling; |
c906108c SS |
15650 | } |
15651 | ||
34eaf542 | 15652 | /* Attach template arguments to type. */ |
2f4732b0 | 15653 | if (!template_args.empty ()) |
34eaf542 | 15654 | { |
3e1d3d8c | 15655 | has_template_parameters = true; |
34eaf542 | 15656 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15657 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15658 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15659 | = XOBNEWVEC (&objfile->objfile_obstack, |
15660 | struct symbol *, | |
15661 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15662 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15663 | template_args.data (), |
34eaf542 TT |
15664 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15665 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15666 | } |
15667 | ||
c906108c | 15668 | /* Attach fields and member functions to the type. */ |
317f7127 | 15669 | if (fi.nfields () > 0) |
e7c27a73 | 15670 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15671 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15672 | { |
e7c27a73 | 15673 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15674 | |
c5aa993b | 15675 | /* Get the type which refers to the base class (possibly this |
c906108c | 15676 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15677 | class from the DW_AT_containing_type attribute. This use of |
15678 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15679 | |
e142c38c | 15680 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15681 | { |
e7c27a73 | 15682 | struct type *t = die_containing_type (die, cu); |
c906108c | 15683 | |
ae6ae975 | 15684 | set_type_vptr_basetype (type, t); |
c906108c SS |
15685 | if (type == t) |
15686 | { | |
c906108c SS |
15687 | int i; |
15688 | ||
15689 | /* Our own class provides vtbl ptr. */ | |
15690 | for (i = TYPE_NFIELDS (t) - 1; | |
15691 | i >= TYPE_N_BASECLASSES (t); | |
15692 | --i) | |
15693 | { | |
0d5cff50 | 15694 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15695 | |
1168df01 | 15696 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15697 | { |
ae6ae975 | 15698 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15699 | break; |
15700 | } | |
15701 | } | |
15702 | ||
15703 | /* Complain if virtual function table field not found. */ | |
15704 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15705 | complaint (_("virtual function table pointer " |
3e43a32a | 15706 | "not found when defining class '%s'"), |
e86ca25f | 15707 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
15708 | } |
15709 | else | |
15710 | { | |
ae6ae975 | 15711 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15712 | } |
15713 | } | |
f6235d4c | 15714 | else if (cu->producer |
61012eef | 15715 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15716 | { |
15717 | /* The IBM XLC compiler does not provide direct indication | |
15718 | of the containing type, but the vtable pointer is | |
15719 | always named __vfp. */ | |
15720 | ||
15721 | int i; | |
15722 | ||
15723 | for (i = TYPE_NFIELDS (type) - 1; | |
15724 | i >= TYPE_N_BASECLASSES (type); | |
15725 | --i) | |
15726 | { | |
15727 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15728 | { | |
ae6ae975 DE |
15729 | set_type_vptr_fieldno (type, i); |
15730 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15731 | break; |
15732 | } | |
15733 | } | |
15734 | } | |
c906108c | 15735 | } |
98751a41 JK |
15736 | |
15737 | /* Copy fi.typedef_field_list linked list elements content into the | |
15738 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15739 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15740 | { |
be2daae6 | 15741 | int count = fi.typedef_field_list.size (); |
98751a41 | 15742 | |
a0d7a4ff | 15743 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15744 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15745 | = ((struct decl_field *) |
be2daae6 TT |
15746 | TYPE_ALLOC (type, |
15747 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15748 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15749 | |
be2daae6 TT |
15750 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15751 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15752 | } |
c767944b | 15753 | |
883fd55a KS |
15754 | /* Copy fi.nested_types_list linked list elements content into the |
15755 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15756 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15757 | { |
be2daae6 | 15758 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15759 | |
15760 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15761 | TYPE_NESTED_TYPES_ARRAY (type) | |
15762 | = ((struct decl_field *) | |
be2daae6 TT |
15763 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15764 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15765 | |
be2daae6 TT |
15766 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15767 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15768 | } |
c906108c | 15769 | } |
63d06c5c | 15770 | |
bb5ed363 | 15771 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15772 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15773 | cu->rust_unions.push_back (type); | |
0b92b5bb | 15774 | |
90aeadfc DC |
15775 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15776 | snapshots) has been known to create a die giving a declaration | |
15777 | for a class that has, as a child, a die giving a definition for a | |
15778 | nested class. So we have to process our children even if the | |
15779 | current die is a declaration. Normally, of course, a declaration | |
15780 | won't have any children at all. */ | |
134d01f1 | 15781 | |
ca040673 DE |
15782 | child_die = die->child; |
15783 | ||
90aeadfc DC |
15784 | while (child_die != NULL && child_die->tag) |
15785 | { | |
15786 | if (child_die->tag == DW_TAG_member | |
15787 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15788 | || child_die->tag == DW_TAG_inheritance |
15789 | || child_die->tag == DW_TAG_template_value_param | |
15790 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15791 | { |
90aeadfc | 15792 | /* Do nothing. */ |
134d01f1 | 15793 | } |
90aeadfc DC |
15794 | else |
15795 | process_die (child_die, cu); | |
134d01f1 | 15796 | |
436c571c | 15797 | child_die = child_die->sibling; |
134d01f1 DJ |
15798 | } |
15799 | ||
fa4028e9 JB |
15800 | /* Do not consider external references. According to the DWARF standard, |
15801 | these DIEs are identified by the fact that they have no byte_size | |
15802 | attribute, and a declaration attribute. */ | |
15803 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15cd93d0 TV |
15804 | || !die_is_declaration (die, cu) |
15805 | || dwarf2_attr (die, DW_AT_signature, cu) != NULL) | |
3e1d3d8c TT |
15806 | { |
15807 | struct symbol *sym = new_symbol (die, type, cu); | |
15808 | ||
15809 | if (has_template_parameters) | |
15810 | { | |
a776957c TT |
15811 | struct symtab *symtab; |
15812 | if (sym != nullptr) | |
15813 | symtab = symbol_symtab (sym); | |
15814 | else if (cu->line_header != nullptr) | |
15815 | { | |
15816 | /* Any related symtab will do. */ | |
15817 | symtab | |
7ba99d21 | 15818 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15819 | } |
15820 | else | |
15821 | { | |
15822 | symtab = nullptr; | |
15823 | complaint (_("could not find suitable " | |
15824 | "symtab for template parameter" | |
15825 | " - DIE at %s [in module %s]"), | |
15826 | sect_offset_str (die->sect_off), | |
15827 | objfile_name (objfile)); | |
15828 | } | |
15829 | ||
15830 | if (symtab != nullptr) | |
15831 | { | |
15832 | /* Make sure that the symtab is set on the new symbols. | |
15833 | Even though they don't appear in this symtab directly, | |
15834 | other parts of gdb assume that symbols do, and this is | |
15835 | reasonably true. */ | |
15836 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15837 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15838 | } | |
3e1d3d8c TT |
15839 | } |
15840 | } | |
134d01f1 DJ |
15841 | } |
15842 | ||
ed6acedd TT |
15843 | /* Assuming DIE is an enumeration type, and TYPE is its associated |
15844 | type, update TYPE using some information only available in DIE's | |
15845 | children. In particular, the fields are computed. */ | |
55426c9d JB |
15846 | |
15847 | static void | |
15848 | update_enumeration_type_from_children (struct die_info *die, | |
15849 | struct type *type, | |
15850 | struct dwarf2_cu *cu) | |
15851 | { | |
60f7655a | 15852 | struct die_info *child_die; |
55426c9d JB |
15853 | int unsigned_enum = 1; |
15854 | int flag_enum = 1; | |
55426c9d | 15855 | |
8268c778 | 15856 | auto_obstack obstack; |
ed6acedd | 15857 | std::vector<struct field> fields; |
55426c9d | 15858 | |
60f7655a DE |
15859 | for (child_die = die->child; |
15860 | child_die != NULL && child_die->tag; | |
436c571c | 15861 | child_die = child_die->sibling) |
55426c9d JB |
15862 | { |
15863 | struct attribute *attr; | |
15864 | LONGEST value; | |
15865 | const gdb_byte *bytes; | |
15866 | struct dwarf2_locexpr_baton *baton; | |
15867 | const char *name; | |
60f7655a | 15868 | |
55426c9d JB |
15869 | if (child_die->tag != DW_TAG_enumerator) |
15870 | continue; | |
15871 | ||
15872 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
15873 | if (attr == NULL) | |
15874 | continue; | |
15875 | ||
15876 | name = dwarf2_name (child_die, cu); | |
15877 | if (name == NULL) | |
15878 | name = "<anonymous enumerator>"; | |
15879 | ||
15880 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
15881 | &value, &bytes, &baton); | |
15882 | if (value < 0) | |
15883 | { | |
15884 | unsigned_enum = 0; | |
15885 | flag_enum = 0; | |
15886 | } | |
55426c9d | 15887 | else |
edd45eb0 SM |
15888 | { |
15889 | if (count_one_bits_ll (value) >= 2) | |
15890 | flag_enum = 0; | |
edd45eb0 | 15891 | } |
55426c9d | 15892 | |
ed6acedd TT |
15893 | fields.emplace_back (); |
15894 | struct field &field = fields.back (); | |
15895 | FIELD_NAME (field) = dwarf2_physname (name, child_die, cu); | |
15896 | SET_FIELD_ENUMVAL (field, value); | |
15897 | } | |
15898 | ||
15899 | if (!fields.empty ()) | |
15900 | { | |
15901 | TYPE_NFIELDS (type) = fields.size (); | |
15902 | TYPE_FIELDS (type) = (struct field *) | |
15903 | TYPE_ALLOC (type, sizeof (struct field) * fields.size ()); | |
15904 | memcpy (TYPE_FIELDS (type), fields.data (), | |
15905 | sizeof (struct field) * fields.size ()); | |
55426c9d JB |
15906 | } |
15907 | ||
15908 | if (unsigned_enum) | |
15909 | TYPE_UNSIGNED (type) = 1; | |
15910 | if (flag_enum) | |
15911 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
15912 | } |
15913 | ||
134d01f1 DJ |
15914 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
15915 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 15916 | |
f792889a | 15917 | static struct type * |
134d01f1 | 15918 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15919 | { |
518817b3 | 15920 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15921 | struct type *type; |
c906108c | 15922 | struct attribute *attr; |
0114d602 | 15923 | const char *name; |
134d01f1 | 15924 | |
348e048f DE |
15925 | /* If the definition of this type lives in .debug_types, read that type. |
15926 | Don't follow DW_AT_specification though, that will take us back up | |
15927 | the chain and we want to go down. */ | |
052c8bb8 | 15928 | attr = die->attr (DW_AT_signature); |
435d3d88 | 15929 | if (attr != nullptr) |
348e048f | 15930 | { |
ac9ec31b | 15931 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15932 | |
ac9ec31b | 15933 | /* The type's CU may not be the same as CU. |
02142a6c | 15934 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15935 | return set_die_type (die, type, cu); |
15936 | } | |
15937 | ||
c906108c SS |
15938 | type = alloc_type (objfile); |
15939 | ||
67607e24 | 15940 | type->set_code (TYPE_CODE_ENUM); |
94af9270 | 15941 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 15942 | if (name != NULL) |
e86ca25f | 15943 | TYPE_NAME (type) = name; |
c906108c | 15944 | |
0626fc76 TT |
15945 | attr = dwarf2_attr (die, DW_AT_type, cu); |
15946 | if (attr != NULL) | |
15947 | { | |
15948 | struct type *underlying_type = die_type (die, cu); | |
15949 | ||
15950 | TYPE_TARGET_TYPE (type) = underlying_type; | |
15951 | } | |
15952 | ||
e142c38c | 15953 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15954 | if (attr != nullptr) |
c906108c SS |
15955 | { |
15956 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15957 | } | |
15958 | else | |
15959 | { | |
15960 | TYPE_LENGTH (type) = 0; | |
15961 | } | |
15962 | ||
2b4424c3 TT |
15963 | maybe_set_alignment (cu, die, type); |
15964 | ||
137033e9 JB |
15965 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
15966 | declared as private in the package spec, and then defined only | |
15967 | inside the package body. Such types are known as Taft Amendment | |
15968 | Types. When another package uses such a type, an incomplete DIE | |
15969 | may be generated by the compiler. */ | |
02eb380e | 15970 | if (die_is_declaration (die, cu)) |
876cecd0 | 15971 | TYPE_STUB (type) = 1; |
02eb380e | 15972 | |
0626fc76 TT |
15973 | /* If this type has an underlying type that is not a stub, then we |
15974 | may use its attributes. We always use the "unsigned" attribute | |
15975 | in this situation, because ordinarily we guess whether the type | |
15976 | is unsigned -- but the guess can be wrong and the underlying type | |
15977 | can tell us the reality. However, we defer to a local size | |
15978 | attribute if one exists, because this lets the compiler override | |
15979 | the underlying type if needed. */ | |
15980 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
15981 | { | |
9e7c9a03 HD |
15982 | struct type *underlying_type = TYPE_TARGET_TYPE (type); |
15983 | underlying_type = check_typedef (underlying_type); | |
15984 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (underlying_type); | |
0626fc76 | 15985 | if (TYPE_LENGTH (type) == 0) |
9e7c9a03 | 15986 | TYPE_LENGTH (type) = TYPE_LENGTH (underlying_type); |
2b4424c3 | 15987 | if (TYPE_RAW_ALIGN (type) == 0 |
9e7c9a03 HD |
15988 | && TYPE_RAW_ALIGN (underlying_type) != 0) |
15989 | set_type_align (type, TYPE_RAW_ALIGN (underlying_type)); | |
0626fc76 TT |
15990 | } |
15991 | ||
3d567982 TT |
15992 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
15993 | ||
ed6acedd TT |
15994 | set_die_type (die, type, cu); |
15995 | ||
15996 | /* Finish the creation of this type by using the enum's children. | |
15997 | Note that, as usual, this must come after set_die_type to avoid | |
15998 | infinite recursion when trying to compute the names of the | |
15999 | enumerators. */ | |
16000 | update_enumeration_type_from_children (die, type, cu); | |
16001 | ||
16002 | return type; | |
134d01f1 DJ |
16003 | } |
16004 | ||
16005 | /* Given a pointer to a die which begins an enumeration, process all | |
16006 | the dies that define the members of the enumeration, and create the | |
16007 | symbol for the enumeration type. | |
16008 | ||
16009 | NOTE: We reverse the order of the element list. */ | |
16010 | ||
16011 | static void | |
16012 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16013 | { | |
f792889a | 16014 | struct type *this_type; |
134d01f1 | 16015 | |
f792889a DJ |
16016 | this_type = get_die_type (die, cu); |
16017 | if (this_type == NULL) | |
16018 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16019 | |
639d11d3 | 16020 | if (die->child != NULL) |
c906108c | 16021 | { |
9dc481d3 | 16022 | struct die_info *child_die; |
15d034d0 | 16023 | const char *name; |
9dc481d3 | 16024 | |
639d11d3 | 16025 | child_die = die->child; |
c906108c SS |
16026 | while (child_die && child_die->tag) |
16027 | { | |
16028 | if (child_die->tag != DW_TAG_enumerator) | |
16029 | { | |
e7c27a73 | 16030 | process_die (child_die, cu); |
c906108c SS |
16031 | } |
16032 | else | |
16033 | { | |
39cbfefa DJ |
16034 | name = dwarf2_name (child_die, cu); |
16035 | if (name) | |
ed6acedd | 16036 | new_symbol (child_die, this_type, cu); |
c906108c SS |
16037 | } |
16038 | ||
436c571c | 16039 | child_die = child_die->sibling; |
c906108c | 16040 | } |
c906108c | 16041 | } |
134d01f1 | 16042 | |
6c83ed52 TT |
16043 | /* If we are reading an enum from a .debug_types unit, and the enum |
16044 | is a declaration, and the enum is not the signatured type in the | |
16045 | unit, then we do not want to add a symbol for it. Adding a | |
16046 | symbol would in some cases obscure the true definition of the | |
16047 | enum, giving users an incomplete type when the definition is | |
16048 | actually available. Note that we do not want to do this for all | |
16049 | enums which are just declarations, because C++0x allows forward | |
16050 | enum declarations. */ | |
3019eac3 | 16051 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16052 | && die_is_declaration (die, cu)) |
16053 | { | |
52dc124a | 16054 | struct signatured_type *sig_type; |
6c83ed52 | 16055 | |
c0f78cd4 | 16056 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16057 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16058 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16059 | return; |
16060 | } | |
16061 | ||
f792889a | 16062 | new_symbol (die, this_type, cu); |
c906108c SS |
16063 | } |
16064 | ||
16065 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16066 | the DIE's type field. For now, this only handles one dimensional | |
16067 | arrays. */ | |
16068 | ||
f792889a | 16069 | static struct type * |
e7c27a73 | 16070 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16071 | { |
518817b3 | 16072 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16073 | struct die_info *child_die; |
7e314c57 | 16074 | struct type *type; |
c906108c | 16075 | struct type *element_type, *range_type, *index_type; |
c906108c | 16076 | struct attribute *attr; |
15d034d0 | 16077 | const char *name; |
a405673c | 16078 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16079 | unsigned int bit_stride = 0; |
c906108c | 16080 | |
e7c27a73 | 16081 | element_type = die_type (die, cu); |
c906108c | 16082 | |
7e314c57 JK |
16083 | /* The die_type call above may have already set the type for this DIE. */ |
16084 | type = get_die_type (die, cu); | |
16085 | if (type) | |
16086 | return type; | |
16087 | ||
dc53a7ad JB |
16088 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16089 | if (attr != NULL) | |
a405673c JB |
16090 | { |
16091 | int stride_ok; | |
09ba997f | 16092 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
a405673c JB |
16093 | |
16094 | byte_stride_prop | |
16095 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16096 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16097 | prop_type); | |
a405673c JB |
16098 | if (!stride_ok) |
16099 | { | |
b98664d3 | 16100 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16101 | " - DIE at %s [in module %s]"), |
16102 | sect_offset_str (die->sect_off), | |
518817b3 | 16103 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
16104 | /* Ignore this attribute. We will likely not be able to print |
16105 | arrays of this type correctly, but there is little we can do | |
16106 | to help if we cannot read the attribute's value. */ | |
16107 | byte_stride_prop = NULL; | |
16108 | } | |
16109 | } | |
dc53a7ad JB |
16110 | |
16111 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16112 | if (attr != NULL) | |
16113 | bit_stride = DW_UNSND (attr); | |
16114 | ||
c906108c SS |
16115 | /* Irix 6.2 native cc creates array types without children for |
16116 | arrays with unspecified length. */ | |
639d11d3 | 16117 | if (die->child == NULL) |
c906108c | 16118 | { |
46bf5051 | 16119 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16120 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16121 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16122 | byte_stride_prop, bit_stride); |
f792889a | 16123 | return set_die_type (die, type, cu); |
c906108c SS |
16124 | } |
16125 | ||
791afaa2 | 16126 | std::vector<struct type *> range_types; |
639d11d3 | 16127 | child_die = die->child; |
c906108c SS |
16128 | while (child_die && child_die->tag) |
16129 | { | |
16130 | if (child_die->tag == DW_TAG_subrange_type) | |
16131 | { | |
f792889a | 16132 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16133 | |
f792889a | 16134 | if (child_type != NULL) |
a02abb62 | 16135 | { |
0963b4bd MS |
16136 | /* The range type was succesfully read. Save it for the |
16137 | array type creation. */ | |
791afaa2 | 16138 | range_types.push_back (child_type); |
a02abb62 | 16139 | } |
c906108c | 16140 | } |
436c571c | 16141 | child_die = child_die->sibling; |
c906108c SS |
16142 | } |
16143 | ||
16144 | /* Dwarf2 dimensions are output from left to right, create the | |
16145 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16146 | |
c906108c | 16147 | type = element_type; |
7ca2d3a3 DL |
16148 | |
16149 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16150 | { | |
16151 | int i = 0; | |
9a619af0 | 16152 | |
791afaa2 | 16153 | while (i < range_types.size ()) |
dc53a7ad | 16154 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 16155 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
16156 | } |
16157 | else | |
16158 | { | |
791afaa2 | 16159 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16160 | while (ndim-- > 0) |
dc53a7ad | 16161 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 16162 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 16163 | } |
c906108c | 16164 | |
f5f8a009 EZ |
16165 | /* Understand Dwarf2 support for vector types (like they occur on |
16166 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16167 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16168 | custom vendor extension. The main difference between a regular | |
16169 | array and the vector variant is that vectors are passed by value | |
16170 | to functions. */ | |
e142c38c | 16171 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 16172 | if (attr != nullptr) |
ea37ba09 | 16173 | make_vector_type (type); |
f5f8a009 | 16174 | |
dbc98a8b KW |
16175 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16176 | implementation may choose to implement triple vectors using this | |
16177 | attribute. */ | |
16178 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 16179 | if (attr != nullptr) |
dbc98a8b KW |
16180 | { |
16181 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16182 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16183 | else | |
b98664d3 | 16184 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16185 | "than the total size of elements")); |
dbc98a8b KW |
16186 | } |
16187 | ||
39cbfefa DJ |
16188 | name = dwarf2_name (die, cu); |
16189 | if (name) | |
16190 | TYPE_NAME (type) = name; | |
6e70227d | 16191 | |
2b4424c3 TT |
16192 | maybe_set_alignment (cu, die, type); |
16193 | ||
0963b4bd | 16194 | /* Install the type in the die. */ |
7e314c57 JK |
16195 | set_die_type (die, type, cu); |
16196 | ||
16197 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16198 | set_descriptive_type (type, die, cu); |
16199 | ||
7e314c57 | 16200 | return type; |
c906108c SS |
16201 | } |
16202 | ||
7ca2d3a3 | 16203 | static enum dwarf_array_dim_ordering |
6e70227d | 16204 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16205 | { |
16206 | struct attribute *attr; | |
16207 | ||
16208 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16209 | ||
435d3d88 | 16210 | if (attr != nullptr) |
aead7601 | 16211 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
7ca2d3a3 | 16212 | |
0963b4bd MS |
16213 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16214 | opposite order to the dwarf2 specification, but data is still | |
16215 | laid out as per normal fortran. | |
7ca2d3a3 | 16216 | |
0963b4bd MS |
16217 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16218 | version checking. */ | |
7ca2d3a3 | 16219 | |
905e0470 PM |
16220 | if (cu->language == language_fortran |
16221 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16222 | { |
16223 | return DW_ORD_row_major; | |
16224 | } | |
16225 | ||
6e70227d | 16226 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16227 | { |
16228 | case array_column_major: | |
16229 | return DW_ORD_col_major; | |
16230 | case array_row_major: | |
16231 | default: | |
16232 | return DW_ORD_row_major; | |
16233 | }; | |
16234 | } | |
16235 | ||
72019c9c | 16236 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16237 | the DIE's type field. */ |
72019c9c | 16238 | |
f792889a | 16239 | static struct type * |
72019c9c GM |
16240 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16241 | { | |
7e314c57 JK |
16242 | struct type *domain_type, *set_type; |
16243 | struct attribute *attr; | |
f792889a | 16244 | |
7e314c57 JK |
16245 | domain_type = die_type (die, cu); |
16246 | ||
16247 | /* The die_type call above may have already set the type for this DIE. */ | |
16248 | set_type = get_die_type (die, cu); | |
16249 | if (set_type) | |
16250 | return set_type; | |
16251 | ||
16252 | set_type = create_set_type (NULL, domain_type); | |
16253 | ||
16254 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 16255 | if (attr != nullptr) |
d09039dd | 16256 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
7e314c57 | 16257 | |
2b4424c3 TT |
16258 | maybe_set_alignment (cu, die, set_type); |
16259 | ||
f792889a | 16260 | return set_die_type (die, set_type, cu); |
72019c9c | 16261 | } |
7ca2d3a3 | 16262 | |
0971de02 TT |
16263 | /* A helper for read_common_block that creates a locexpr baton. |
16264 | SYM is the symbol which we are marking as computed. | |
16265 | COMMON_DIE is the DIE for the common block. | |
16266 | COMMON_LOC is the location expression attribute for the common | |
16267 | block itself. | |
16268 | MEMBER_LOC is the location expression attribute for the particular | |
16269 | member of the common block that we are processing. | |
16270 | CU is the CU from which the above come. */ | |
16271 | ||
16272 | static void | |
16273 | mark_common_block_symbol_computed (struct symbol *sym, | |
16274 | struct die_info *common_die, | |
16275 | struct attribute *common_loc, | |
16276 | struct attribute *member_loc, | |
16277 | struct dwarf2_cu *cu) | |
16278 | { | |
518817b3 SM |
16279 | struct dwarf2_per_objfile *dwarf2_per_objfile |
16280 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
16281 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
16282 | struct dwarf2_locexpr_baton *baton; | |
16283 | gdb_byte *ptr; | |
16284 | unsigned int cu_off; | |
08feed99 | 16285 | enum bfd_endian byte_order = gdbarch_byte_order (objfile->arch ()); |
0971de02 TT |
16286 | LONGEST offset = 0; |
16287 | ||
16288 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
16289 | gdb_assert (common_loc->form_is_block ()); |
16290 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 16291 | || member_loc->form_is_constant ()); |
0971de02 | 16292 | |
8d749320 | 16293 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16294 | baton->per_cu = cu->per_cu; |
16295 | gdb_assert (baton->per_cu); | |
16296 | ||
16297 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16298 | ||
cd6c91b4 | 16299 | if (member_loc->form_is_constant ()) |
0971de02 | 16300 | { |
0826b30a | 16301 | offset = member_loc->constant_value (0); |
0971de02 TT |
16302 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; |
16303 | } | |
16304 | else | |
16305 | baton->size += DW_BLOCK (member_loc)->size; | |
16306 | ||
224c3ddb | 16307 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16308 | baton->data = ptr; |
16309 | ||
16310 | *ptr++ = DW_OP_call4; | |
9c541725 | 16311 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16312 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16313 | ptr += 4; | |
16314 | ||
cd6c91b4 | 16315 | if (member_loc->form_is_constant ()) |
0971de02 TT |
16316 | { |
16317 | *ptr++ = DW_OP_addr; | |
16318 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16319 | ptr += cu->header.addr_size; | |
16320 | } | |
16321 | else | |
16322 | { | |
16323 | /* We have to copy the data here, because DW_OP_call4 will only | |
16324 | use a DW_AT_location attribute. */ | |
16325 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16326 | ptr += DW_BLOCK (member_loc)->size; | |
16327 | } | |
16328 | ||
16329 | *ptr++ = DW_OP_plus; | |
16330 | gdb_assert (ptr - baton->data == baton->size); | |
16331 | ||
0971de02 | 16332 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16333 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16334 | } |
16335 | ||
4357ac6c TT |
16336 | /* Create appropriate locally-scoped variables for all the |
16337 | DW_TAG_common_block entries. Also create a struct common_block | |
16338 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16339 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16340 | variable names. */ |
c906108c SS |
16341 | |
16342 | static void | |
e7c27a73 | 16343 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16344 | { |
0971de02 TT |
16345 | struct attribute *attr; |
16346 | ||
16347 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16348 | if (attr != nullptr) |
0971de02 TT |
16349 | { |
16350 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16351 | if (attr->form_is_block ()) |
0971de02 TT |
16352 | { |
16353 | /* Ok. */ | |
16354 | } | |
cd6c91b4 | 16355 | else if (attr->form_is_section_offset ()) |
0971de02 TT |
16356 | { |
16357 | dwarf2_complex_location_expr_complaint (); | |
16358 | attr = NULL; | |
16359 | } | |
16360 | else | |
16361 | { | |
16362 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16363 | "common block member"); | |
16364 | attr = NULL; | |
16365 | } | |
16366 | } | |
16367 | ||
639d11d3 | 16368 | if (die->child != NULL) |
c906108c | 16369 | { |
518817b3 | 16370 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16371 | struct die_info *child_die; |
16372 | size_t n_entries = 0, size; | |
16373 | struct common_block *common_block; | |
16374 | struct symbol *sym; | |
74ac6d43 | 16375 | |
4357ac6c TT |
16376 | for (child_die = die->child; |
16377 | child_die && child_die->tag; | |
436c571c | 16378 | child_die = child_die->sibling) |
4357ac6c TT |
16379 | ++n_entries; |
16380 | ||
16381 | size = (sizeof (struct common_block) | |
16382 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16383 | common_block |
16384 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16385 | size); | |
4357ac6c TT |
16386 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16387 | common_block->n_entries = 0; | |
16388 | ||
16389 | for (child_die = die->child; | |
16390 | child_die && child_die->tag; | |
436c571c | 16391 | child_die = child_die->sibling) |
4357ac6c TT |
16392 | { |
16393 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16394 | symbol scope. */ | |
e7c27a73 | 16395 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16396 | if (sym != NULL) |
16397 | { | |
16398 | struct attribute *member_loc; | |
16399 | ||
16400 | common_block->contents[common_block->n_entries++] = sym; | |
16401 | ||
16402 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16403 | cu); | |
16404 | if (member_loc) | |
16405 | { | |
16406 | /* GDB has handled this for a long time, but it is | |
16407 | not specified by DWARF. It seems to have been | |
16408 | emitted by gfortran at least as recently as: | |
16409 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16410 | complaint (_("Variable in common block has " |
0971de02 | 16411 | "DW_AT_data_member_location " |
9d8780f0 SM |
16412 | "- DIE at %s [in module %s]"), |
16413 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16414 | objfile_name (objfile)); |
0971de02 | 16415 | |
cd6c91b4 | 16416 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16417 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16418 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16419 | || member_loc->form_is_block ()) |
0971de02 | 16420 | { |
435d3d88 | 16421 | if (attr != nullptr) |
0971de02 TT |
16422 | mark_common_block_symbol_computed (sym, die, attr, |
16423 | member_loc, cu); | |
16424 | } | |
16425 | else | |
16426 | dwarf2_complex_location_expr_complaint (); | |
16427 | } | |
16428 | } | |
c906108c | 16429 | } |
4357ac6c TT |
16430 | |
16431 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16432 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16433 | } |
16434 | } | |
16435 | ||
0114d602 | 16436 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16437 | |
0114d602 DJ |
16438 | static struct type * |
16439 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16440 | { |
518817b3 | 16441 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16442 | const char *previous_prefix, *name; |
9219021c | 16443 | int is_anonymous; |
0114d602 DJ |
16444 | struct type *type; |
16445 | ||
16446 | /* For extensions, reuse the type of the original namespace. */ | |
16447 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16448 | { | |
16449 | struct die_info *ext_die; | |
16450 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16451 | |
0114d602 DJ |
16452 | ext_die = dwarf2_extension (die, &ext_cu); |
16453 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16454 | |
16455 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16456 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16457 | return set_die_type (die, type, cu); |
16458 | } | |
9219021c | 16459 | |
e142c38c | 16460 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16461 | |
16462 | /* Now build the name of the current namespace. */ | |
16463 | ||
0114d602 DJ |
16464 | previous_prefix = determine_prefix (die, cu); |
16465 | if (previous_prefix[0] != '\0') | |
16466 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16467 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16468 | |
16469 | /* Create the type. */ | |
19f392bc | 16470 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16471 | |
60531b24 | 16472 | return set_die_type (die, type, cu); |
0114d602 DJ |
16473 | } |
16474 | ||
22cee43f | 16475 | /* Read a namespace scope. */ |
0114d602 DJ |
16476 | |
16477 | static void | |
16478 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16479 | { | |
518817b3 | 16480 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16481 | int is_anonymous; |
9219021c | 16482 | |
5c4e30ca DC |
16483 | /* Add a symbol associated to this if we haven't seen the namespace |
16484 | before. Also, add a using directive if it's an anonymous | |
16485 | namespace. */ | |
9219021c | 16486 | |
f2f0e013 | 16487 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16488 | { |
16489 | struct type *type; | |
16490 | ||
0114d602 | 16491 | type = read_type_die (die, cu); |
e7c27a73 | 16492 | new_symbol (die, type, cu); |
5c4e30ca | 16493 | |
e8e80198 | 16494 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16495 | if (is_anonymous) |
0114d602 DJ |
16496 | { |
16497 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16498 | |
eb1e02fd | 16499 | std::vector<const char *> excludes; |
804d2729 | 16500 | add_using_directive (using_directives (cu), |
22cee43f | 16501 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16502 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16503 | } |
5c4e30ca | 16504 | } |
9219021c | 16505 | |
639d11d3 | 16506 | if (die->child != NULL) |
d9fa45fe | 16507 | { |
639d11d3 | 16508 | struct die_info *child_die = die->child; |
6e70227d | 16509 | |
d9fa45fe DC |
16510 | while (child_die && child_die->tag) |
16511 | { | |
e7c27a73 | 16512 | process_die (child_die, cu); |
436c571c | 16513 | child_die = child_die->sibling; |
d9fa45fe DC |
16514 | } |
16515 | } | |
38d518c9 EZ |
16516 | } |
16517 | ||
f55ee35c JK |
16518 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16519 | imported module. Still we need that type as local Fortran "use ... only" | |
16520 | declaration imports depend on the created type in determine_prefix. */ | |
16521 | ||
16522 | static struct type * | |
16523 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16524 | { | |
518817b3 | 16525 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16526 | const char *module_name; |
f55ee35c JK |
16527 | struct type *type; |
16528 | ||
16529 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16530 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16531 | |
f55ee35c JK |
16532 | return set_die_type (die, type, cu); |
16533 | } | |
16534 | ||
5d7cb8df JK |
16535 | /* Read a Fortran module. */ |
16536 | ||
16537 | static void | |
16538 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16539 | { | |
16540 | struct die_info *child_die = die->child; | |
530e8392 KB |
16541 | struct type *type; |
16542 | ||
16543 | type = read_type_die (die, cu); | |
16544 | new_symbol (die, type, cu); | |
5d7cb8df | 16545 | |
5d7cb8df JK |
16546 | while (child_die && child_die->tag) |
16547 | { | |
16548 | process_die (child_die, cu); | |
436c571c | 16549 | child_die = child_die->sibling; |
5d7cb8df JK |
16550 | } |
16551 | } | |
16552 | ||
38d518c9 EZ |
16553 | /* Return the name of the namespace represented by DIE. Set |
16554 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16555 | namespace. */ | |
16556 | ||
16557 | static const char * | |
e142c38c | 16558 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16559 | { |
16560 | struct die_info *current_die; | |
16561 | const char *name = NULL; | |
16562 | ||
16563 | /* Loop through the extensions until we find a name. */ | |
16564 | ||
16565 | for (current_die = die; | |
16566 | current_die != NULL; | |
f2f0e013 | 16567 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16568 | { |
96553a0c DE |
16569 | /* We don't use dwarf2_name here so that we can detect the absence |
16570 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16571 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16572 | |
38d518c9 EZ |
16573 | if (name != NULL) |
16574 | break; | |
16575 | } | |
16576 | ||
16577 | /* Is it an anonymous namespace? */ | |
16578 | ||
16579 | *is_anonymous = (name == NULL); | |
16580 | if (*is_anonymous) | |
2b1dbab0 | 16581 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16582 | |
16583 | return name; | |
d9fa45fe DC |
16584 | } |
16585 | ||
c906108c SS |
16586 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16587 | the user defined type vector. */ | |
16588 | ||
f792889a | 16589 | static struct type * |
e7c27a73 | 16590 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16591 | { |
518817b3 | 16592 | struct gdbarch *gdbarch |
08feed99 | 16593 | = cu->per_cu->dwarf2_per_objfile->objfile->arch (); |
e7c27a73 | 16594 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16595 | struct type *type; |
8b2dbe47 KB |
16596 | struct attribute *attr_byte_size; |
16597 | struct attribute *attr_address_class; | |
16598 | int byte_size, addr_class; | |
7e314c57 JK |
16599 | struct type *target_type; |
16600 | ||
16601 | target_type = die_type (die, cu); | |
c906108c | 16602 | |
7e314c57 JK |
16603 | /* The die_type call above may have already set the type for this DIE. */ |
16604 | type = get_die_type (die, cu); | |
16605 | if (type) | |
16606 | return type; | |
16607 | ||
16608 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16609 | |
e142c38c | 16610 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16611 | if (attr_byte_size) |
16612 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16613 | else |
8b2dbe47 KB |
16614 | byte_size = cu_header->addr_size; |
16615 | ||
e142c38c | 16616 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16617 | if (attr_address_class) |
16618 | addr_class = DW_UNSND (attr_address_class); | |
16619 | else | |
16620 | addr_class = DW_ADDR_none; | |
16621 | ||
2b4424c3 TT |
16622 | ULONGEST alignment = get_alignment (cu, die); |
16623 | ||
16624 | /* If the pointer size, alignment, or address class is different | |
16625 | than the default, create a type variant marked as such and set | |
16626 | the length accordingly. */ | |
16627 | if (TYPE_LENGTH (type) != byte_size | |
16628 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16629 | && alignment != TYPE_RAW_ALIGN (type)) | |
16630 | || addr_class != DW_ADDR_none) | |
c906108c | 16631 | { |
5e2b427d | 16632 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16633 | { |
16634 | int type_flags; | |
16635 | ||
849957d9 | 16636 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16637 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16638 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16639 | == 0); | |
8b2dbe47 KB |
16640 | type = make_type_with_address_space (type, type_flags); |
16641 | } | |
16642 | else if (TYPE_LENGTH (type) != byte_size) | |
16643 | { | |
b98664d3 | 16644 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 16645 | } |
2b4424c3 TT |
16646 | else if (TYPE_RAW_ALIGN (type) != alignment) |
16647 | { | |
b98664d3 | 16648 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
16649 | " - DIE at %s [in module %s]"), |
16650 | sect_offset_str (die->sect_off), | |
16651 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16652 | } | |
6e70227d | 16653 | else |
9a619af0 MS |
16654 | { |
16655 | /* Should we also complain about unhandled address classes? */ | |
16656 | } | |
c906108c | 16657 | } |
8b2dbe47 KB |
16658 | |
16659 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 16660 | set_type_align (type, alignment); |
f792889a | 16661 | return set_die_type (die, type, cu); |
c906108c SS |
16662 | } |
16663 | ||
16664 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16665 | the user defined type vector. */ | |
16666 | ||
f792889a | 16667 | static struct type * |
e7c27a73 | 16668 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16669 | { |
16670 | struct type *type; | |
16671 | struct type *to_type; | |
16672 | struct type *domain; | |
16673 | ||
e7c27a73 DJ |
16674 | to_type = die_type (die, cu); |
16675 | domain = die_containing_type (die, cu); | |
0d5de010 | 16676 | |
7e314c57 JK |
16677 | /* The calls above may have already set the type for this DIE. */ |
16678 | type = get_die_type (die, cu); | |
16679 | if (type) | |
16680 | return type; | |
16681 | ||
78134374 | 16682 | if (check_typedef (to_type)->code () == TYPE_CODE_METHOD) |
0d5de010 | 16683 | type = lookup_methodptr_type (to_type); |
78134374 | 16684 | else if (check_typedef (to_type)->code () == TYPE_CODE_FUNC) |
7078baeb | 16685 | { |
518817b3 SM |
16686 | struct type *new_type |
16687 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
16688 | |
16689 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16690 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16691 | TYPE_VARARGS (to_type)); | |
16692 | type = lookup_methodptr_type (new_type); | |
16693 | } | |
0d5de010 DJ |
16694 | else |
16695 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16696 | |
f792889a | 16697 | return set_die_type (die, type, cu); |
c906108c SS |
16698 | } |
16699 | ||
4297a3f0 | 16700 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16701 | the user defined type vector. */ |
16702 | ||
f792889a | 16703 | static struct type * |
4297a3f0 AV |
16704 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16705 | enum type_code refcode) | |
c906108c | 16706 | { |
e7c27a73 | 16707 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16708 | struct type *type, *target_type; |
c906108c SS |
16709 | struct attribute *attr; |
16710 | ||
4297a3f0 AV |
16711 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16712 | ||
7e314c57 JK |
16713 | target_type = die_type (die, cu); |
16714 | ||
16715 | /* The die_type call above may have already set the type for this DIE. */ | |
16716 | type = get_die_type (die, cu); | |
16717 | if (type) | |
16718 | return type; | |
16719 | ||
4297a3f0 | 16720 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16721 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16722 | if (attr != nullptr) |
c906108c SS |
16723 | { |
16724 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16725 | } | |
16726 | else | |
16727 | { | |
107d2387 | 16728 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16729 | } |
2b4424c3 | 16730 | maybe_set_alignment (cu, die, type); |
f792889a | 16731 | return set_die_type (die, type, cu); |
c906108c SS |
16732 | } |
16733 | ||
cf363f18 MW |
16734 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16735 | outputs DWARF type qualifiers that apply to an array, not the | |
16736 | element type. But GDB relies on the array element type to carry | |
16737 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16738 | specification. */ | |
16739 | ||
16740 | static struct type * | |
16741 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16742 | struct type *base_type, int cnst, int voltl) | |
16743 | { | |
16744 | struct type *el_type, *inner_array; | |
16745 | ||
16746 | base_type = copy_type (base_type); | |
16747 | inner_array = base_type; | |
16748 | ||
78134374 | 16749 | while (TYPE_TARGET_TYPE (inner_array)->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
16750 | { |
16751 | TYPE_TARGET_TYPE (inner_array) = | |
16752 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16753 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16754 | } | |
16755 | ||
16756 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16757 | cnst |= TYPE_CONST (el_type); | |
16758 | voltl |= TYPE_VOLATILE (el_type); | |
16759 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16760 | ||
16761 | return set_die_type (die, base_type, cu); | |
16762 | } | |
16763 | ||
f792889a | 16764 | static struct type * |
e7c27a73 | 16765 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16766 | { |
f792889a | 16767 | struct type *base_type, *cv_type; |
c906108c | 16768 | |
e7c27a73 | 16769 | base_type = die_type (die, cu); |
7e314c57 JK |
16770 | |
16771 | /* The die_type call above may have already set the type for this DIE. */ | |
16772 | cv_type = get_die_type (die, cu); | |
16773 | if (cv_type) | |
16774 | return cv_type; | |
16775 | ||
2f608a3a KW |
16776 | /* In case the const qualifier is applied to an array type, the element type |
16777 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
78134374 | 16778 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 | 16779 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 16780 | |
f792889a DJ |
16781 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
16782 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16783 | } |
16784 | ||
f792889a | 16785 | static struct type * |
e7c27a73 | 16786 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16787 | { |
f792889a | 16788 | struct type *base_type, *cv_type; |
c906108c | 16789 | |
e7c27a73 | 16790 | base_type = die_type (die, cu); |
7e314c57 JK |
16791 | |
16792 | /* The die_type call above may have already set the type for this DIE. */ | |
16793 | cv_type = get_die_type (die, cu); | |
16794 | if (cv_type) | |
16795 | return cv_type; | |
16796 | ||
cf363f18 MW |
16797 | /* In case the volatile qualifier is applied to an array type, the |
16798 | element type is so qualified, not the array type (section 6.7.3 | |
16799 | of C99). */ | |
78134374 | 16800 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
16801 | return add_array_cv_type (die, cu, base_type, 0, 1); |
16802 | ||
f792889a DJ |
16803 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
16804 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16805 | } |
16806 | ||
06d66ee9 TT |
16807 | /* Handle DW_TAG_restrict_type. */ |
16808 | ||
16809 | static struct type * | |
16810 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
16811 | { | |
16812 | struct type *base_type, *cv_type; | |
16813 | ||
16814 | base_type = die_type (die, cu); | |
16815 | ||
16816 | /* The die_type call above may have already set the type for this DIE. */ | |
16817 | cv_type = get_die_type (die, cu); | |
16818 | if (cv_type) | |
16819 | return cv_type; | |
16820 | ||
16821 | cv_type = make_restrict_type (base_type); | |
16822 | return set_die_type (die, cv_type, cu); | |
16823 | } | |
16824 | ||
a2c2acaf MW |
16825 | /* Handle DW_TAG_atomic_type. */ |
16826 | ||
16827 | static struct type * | |
16828 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
16829 | { | |
16830 | struct type *base_type, *cv_type; | |
16831 | ||
16832 | base_type = die_type (die, cu); | |
16833 | ||
16834 | /* The die_type call above may have already set the type for this DIE. */ | |
16835 | cv_type = get_die_type (die, cu); | |
16836 | if (cv_type) | |
16837 | return cv_type; | |
16838 | ||
16839 | cv_type = make_atomic_type (base_type); | |
16840 | return set_die_type (die, cv_type, cu); | |
16841 | } | |
16842 | ||
c906108c SS |
16843 | /* Extract all information from a DW_TAG_string_type DIE and add to |
16844 | the user defined type vector. It isn't really a user defined type, | |
16845 | but it behaves like one, with other DIE's using an AT_user_def_type | |
16846 | attribute to reference it. */ | |
16847 | ||
f792889a | 16848 | static struct type * |
e7c27a73 | 16849 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16850 | { |
518817b3 | 16851 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
08feed99 | 16852 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
16853 | struct type *type, *range_type, *index_type, *char_type; |
16854 | struct attribute *attr; | |
216a7e6b AB |
16855 | struct dynamic_prop prop; |
16856 | bool length_is_constant = true; | |
16857 | LONGEST length; | |
16858 | ||
16859 | /* There are a couple of places where bit sizes might be made use of | |
16860 | when parsing a DW_TAG_string_type, however, no producer that we know | |
16861 | of make use of these. Handling bit sizes that are a multiple of the | |
16862 | byte size is easy enough, but what about other bit sizes? Lets deal | |
16863 | with that problem when we have to. Warn about these attributes being | |
16864 | unsupported, then parse the type and ignore them like we always | |
16865 | have. */ | |
16866 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
16867 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
16868 | { | |
16869 | static bool warning_printed = false; | |
16870 | if (!warning_printed) | |
16871 | { | |
16872 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
16873 | "currently supported on DW_TAG_string_type.")); | |
16874 | warning_printed = true; | |
16875 | } | |
16876 | } | |
c906108c | 16877 | |
e142c38c | 16878 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 16879 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
16880 | { |
16881 | /* The string length describes the location at which the length of | |
16882 | the string can be found. The size of the length field can be | |
16883 | specified with one of the attributes below. */ | |
16884 | struct type *prop_type; | |
16885 | struct attribute *len | |
16886 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
16887 | if (len == nullptr) | |
16888 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 16889 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
16890 | { |
16891 | /* Pass 0 as the default as we know this attribute is constant | |
16892 | and the default value will not be returned. */ | |
0826b30a | 16893 | LONGEST sz = len->constant_value (0); |
09ba997f | 16894 | prop_type = cu->per_cu->int_type (sz, true); |
216a7e6b AB |
16895 | } |
16896 | else | |
16897 | { | |
16898 | /* If the size is not specified then we assume it is the size of | |
16899 | an address on this target. */ | |
09ba997f | 16900 | prop_type = cu->per_cu->addr_sized_int_type (true); |
216a7e6b AB |
16901 | } |
16902 | ||
16903 | /* Convert the attribute into a dynamic property. */ | |
16904 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
16905 | length = 1; | |
16906 | else | |
16907 | length_is_constant = false; | |
16908 | } | |
16909 | else if (attr != nullptr) | |
16910 | { | |
16911 | /* This DW_AT_string_length just contains the length with no | |
16912 | indirection. There's no need to create a dynamic property in this | |
16913 | case. Pass 0 for the default value as we know it will not be | |
16914 | returned in this case. */ | |
0826b30a | 16915 | length = attr->constant_value (0); |
216a7e6b AB |
16916 | } |
16917 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 16918 | { |
216a7e6b | 16919 | /* We don't currently support non-constant byte sizes for strings. */ |
0826b30a | 16920 | length = attr->constant_value (1); |
c906108c SS |
16921 | } |
16922 | else | |
16923 | { | |
216a7e6b AB |
16924 | /* Use 1 as a fallback length if we have nothing else. */ |
16925 | length = 1; | |
c906108c | 16926 | } |
6ccb9162 | 16927 | |
46bf5051 | 16928 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
16929 | if (length_is_constant) |
16930 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
16931 | else | |
16932 | { | |
16933 | struct dynamic_prop low_bound; | |
16934 | ||
16935 | low_bound.kind = PROP_CONST; | |
16936 | low_bound.data.const_val = 1; | |
16937 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); | |
16938 | } | |
3b7538c0 UW |
16939 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
16940 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 16941 | |
f792889a | 16942 | return set_die_type (die, type, cu); |
c906108c SS |
16943 | } |
16944 | ||
4d804846 JB |
16945 | /* Assuming that DIE corresponds to a function, returns nonzero |
16946 | if the function is prototyped. */ | |
16947 | ||
16948 | static int | |
16949 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
16950 | { | |
16951 | struct attribute *attr; | |
16952 | ||
16953 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
16954 | if (attr && (DW_UNSND (attr) != 0)) | |
16955 | return 1; | |
16956 | ||
16957 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 16958 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
16959 | languages that allow unprototyped functions (Eg: Objective C). |
16960 | For all other languages, assume that functions are always | |
16961 | prototyped. */ | |
16962 | if (cu->language != language_c | |
16963 | && cu->language != language_objc | |
16964 | && cu->language != language_opencl) | |
16965 | return 1; | |
16966 | ||
16967 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
16968 | prototyped and unprototyped functions; default to prototyped, | |
16969 | since that is more common in modern code (and RealView warns | |
16970 | about unprototyped functions). */ | |
16971 | if (producer_is_realview (cu->producer)) | |
16972 | return 1; | |
16973 | ||
16974 | return 0; | |
16975 | } | |
16976 | ||
c906108c SS |
16977 | /* Handle DIES due to C code like: |
16978 | ||
16979 | struct foo | |
c5aa993b JM |
16980 | { |
16981 | int (*funcp)(int a, long l); | |
16982 | int b; | |
16983 | }; | |
c906108c | 16984 | |
0963b4bd | 16985 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 16986 | |
f792889a | 16987 | static struct type * |
e7c27a73 | 16988 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16989 | { |
518817b3 | 16990 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
16991 | struct type *type; /* Type that this function returns. */ |
16992 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
16993 | struct attribute *attr; |
16994 | ||
e7c27a73 | 16995 | type = die_type (die, cu); |
7e314c57 JK |
16996 | |
16997 | /* The die_type call above may have already set the type for this DIE. */ | |
16998 | ftype = get_die_type (die, cu); | |
16999 | if (ftype) | |
17000 | return ftype; | |
17001 | ||
0c8b41f1 | 17002 | ftype = lookup_function_type (type); |
c906108c | 17003 | |
4d804846 | 17004 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17005 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17006 | |
c055b101 CV |
17007 | /* Store the calling convention in the type if it's available in |
17008 | the subroutine die. Otherwise set the calling convention to | |
17009 | the default value DW_CC_normal. */ | |
17010 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf TBA |
17011 | if (attr != nullptr |
17012 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) | |
17013 | TYPE_CALLING_CONVENTION (ftype) | |
17014 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
54fcddd0 UW |
17015 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
17016 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17017 | else | |
17018 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17019 | |
743649fd MW |
17020 | /* Record whether the function returns normally to its caller or not |
17021 | if the DWARF producer set that information. */ | |
17022 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17023 | if (attr && (DW_UNSND (attr) != 0)) | |
17024 | TYPE_NO_RETURN (ftype) = 1; | |
17025 | ||
76c10ea2 GM |
17026 | /* We need to add the subroutine type to the die immediately so |
17027 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17028 | declared as the same subroutine type. */ |
76c10ea2 | 17029 | set_die_type (die, ftype, cu); |
6e70227d | 17030 | |
639d11d3 | 17031 | if (die->child != NULL) |
c906108c | 17032 | { |
bb5ed363 | 17033 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17034 | struct die_info *child_die; |
8072405b | 17035 | int nparams, iparams; |
c906108c SS |
17036 | |
17037 | /* Count the number of parameters. | |
17038 | FIXME: GDB currently ignores vararg functions, but knows about | |
17039 | vararg member functions. */ | |
8072405b | 17040 | nparams = 0; |
639d11d3 | 17041 | child_die = die->child; |
c906108c SS |
17042 | while (child_die && child_die->tag) |
17043 | { | |
17044 | if (child_die->tag == DW_TAG_formal_parameter) | |
17045 | nparams++; | |
17046 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17047 | TYPE_VARARGS (ftype) = 1; |
436c571c | 17048 | child_die = child_die->sibling; |
c906108c SS |
17049 | } |
17050 | ||
17051 | /* Allocate storage for parameters and fill them in. */ | |
17052 | TYPE_NFIELDS (ftype) = nparams; | |
17053 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17054 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17055 | |
8072405b JK |
17056 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17057 | even if we error out during the parameters reading below. */ | |
17058 | for (iparams = 0; iparams < nparams; iparams++) | |
17059 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17060 | ||
17061 | iparams = 0; | |
639d11d3 | 17062 | child_die = die->child; |
c906108c SS |
17063 | while (child_die && child_die->tag) |
17064 | { | |
17065 | if (child_die->tag == DW_TAG_formal_parameter) | |
17066 | { | |
3ce3b1ba PA |
17067 | struct type *arg_type; |
17068 | ||
17069 | /* DWARF version 2 has no clean way to discern C++ | |
17070 | static and non-static member functions. G++ helps | |
17071 | GDB by marking the first parameter for non-static | |
17072 | member functions (which is the this pointer) as | |
17073 | artificial. We pass this information to | |
17074 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17075 | ||
17076 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17077 | 4.5 does not yet generate. */ | |
e142c38c | 17078 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 17079 | if (attr != nullptr) |
c906108c SS |
17080 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
17081 | else | |
9c37b5ae | 17082 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17083 | arg_type = die_type (child_die, cu); |
17084 | ||
17085 | /* RealView does not mark THIS as const, which the testsuite | |
17086 | expects. GCC marks THIS as const in method definitions, | |
17087 | but not in the class specifications (GCC PR 43053). */ | |
17088 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17089 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17090 | { | |
17091 | int is_this = 0; | |
17092 | struct dwarf2_cu *arg_cu = cu; | |
17093 | const char *name = dwarf2_name (child_die, cu); | |
17094 | ||
17095 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 17096 | if (attr != nullptr) |
3ce3b1ba PA |
17097 | { |
17098 | /* If the compiler emits this, use it. */ | |
17099 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17100 | is_this = 1; | |
17101 | } | |
17102 | else if (name && strcmp (name, "this") == 0) | |
17103 | /* Function definitions will have the argument names. */ | |
17104 | is_this = 1; | |
17105 | else if (name == NULL && iparams == 0) | |
17106 | /* Declarations may not have the names, so like | |
17107 | elsewhere in GDB, assume an artificial first | |
17108 | argument is "this". */ | |
17109 | is_this = 1; | |
17110 | ||
17111 | if (is_this) | |
17112 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17113 | arg_type, 0); | |
17114 | } | |
17115 | ||
17116 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17117 | iparams++; |
17118 | } | |
436c571c | 17119 | child_die = child_die->sibling; |
c906108c SS |
17120 | } |
17121 | } | |
17122 | ||
76c10ea2 | 17123 | return ftype; |
c906108c SS |
17124 | } |
17125 | ||
f792889a | 17126 | static struct type * |
e7c27a73 | 17127 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17128 | { |
518817b3 | 17129 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17130 | const char *name = NULL; |
3c8e0968 | 17131 | struct type *this_type, *target_type; |
c906108c | 17132 | |
94af9270 | 17133 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17134 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17135 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17136 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17137 | target_type = die_type (die, cu); |
17138 | if (target_type != this_type) | |
17139 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17140 | else | |
17141 | { | |
17142 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17143 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17144 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17145 | "- DIE at %s [in module %s]"), |
17146 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17147 | TYPE_TARGET_TYPE (this_type) = NULL; |
17148 | } | |
e4003a34 TV |
17149 | if (name == NULL) |
17150 | { | |
17151 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates | |
17152 | anonymous typedefs, which is, strictly speaking, invalid DWARF. | |
17153 | Handle these by just returning the target type, rather than | |
17154 | constructing an anonymous typedef type and trying to handle this | |
17155 | elsewhere. */ | |
17156 | set_die_type (die, target_type, cu); | |
17157 | return target_type; | |
17158 | } | |
f792889a | 17159 | return this_type; |
c906108c SS |
17160 | } |
17161 | ||
9b790ce7 UW |
17162 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17163 | (which may be different from NAME) to the architecture back-end to allow | |
17164 | it to guess the correct format if necessary. */ | |
17165 | ||
17166 | static struct type * | |
17167 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 17168 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 | 17169 | { |
08feed99 | 17170 | struct gdbarch *gdbarch = objfile->arch (); |
9b790ce7 UW |
17171 | const struct floatformat **format; |
17172 | struct type *type; | |
17173 | ||
17174 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17175 | if (format) | |
103a685e | 17176 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 17177 | else |
77b7c781 | 17178 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17179 | |
17180 | return type; | |
17181 | } | |
17182 | ||
eb77c9df AB |
17183 | /* Allocate an integer type of size BITS and name NAME. */ |
17184 | ||
17185 | static struct type * | |
17186 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17187 | int bits, int unsigned_p, const char *name) | |
17188 | { | |
17189 | struct type *type; | |
17190 | ||
17191 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17192 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17193 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17194 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17195 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17196 | type = objfile_type (objfile)->builtin_void; |
17197 | else | |
17198 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17199 | ||
17200 | return type; | |
17201 | } | |
17202 | ||
8bdc1658 AB |
17203 | /* Initialise and return a floating point type of size BITS suitable for |
17204 | use as a component of a complex number. The NAME_HINT is passed through | |
17205 | when initialising the floating point type and is the name of the complex | |
17206 | type. | |
17207 | ||
17208 | As DWARF doesn't currently provide an explicit name for the components | |
17209 | of a complex number, but it can be helpful to have these components | |
17210 | named, we try to select a suitable name based on the size of the | |
17211 | component. */ | |
17212 | static struct type * | |
17213 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17214 | struct objfile *objfile, | |
103a685e TT |
17215 | int bits, const char *name_hint, |
17216 | enum bfd_endian byte_order) | |
8bdc1658 | 17217 | { |
08feed99 | 17218 | gdbarch *gdbarch = objfile->arch (); |
8bdc1658 AB |
17219 | struct type *tt = nullptr; |
17220 | ||
35add35e AB |
17221 | /* Try to find a suitable floating point builtin type of size BITS. |
17222 | We're going to use the name of this type as the name for the complex | |
17223 | target type that we are about to create. */ | |
1db455a7 | 17224 | switch (cu->language) |
8bdc1658 | 17225 | { |
1db455a7 AB |
17226 | case language_fortran: |
17227 | switch (bits) | |
17228 | { | |
17229 | case 32: | |
17230 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17231 | break; | |
17232 | case 64: | |
17233 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17234 | break; | |
17235 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17236 | case 128: | |
17237 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17238 | break; | |
17239 | } | |
8bdc1658 | 17240 | break; |
1db455a7 AB |
17241 | default: |
17242 | switch (bits) | |
17243 | { | |
17244 | case 32: | |
17245 | tt = builtin_type (gdbarch)->builtin_float; | |
17246 | break; | |
17247 | case 64: | |
17248 | tt = builtin_type (gdbarch)->builtin_double; | |
17249 | break; | |
17250 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17251 | case 128: | |
17252 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17253 | break; | |
17254 | } | |
8bdc1658 AB |
17255 | break; |
17256 | } | |
17257 | ||
35add35e AB |
17258 | /* If the type we found doesn't match the size we were looking for, then |
17259 | pretend we didn't find a type at all, the complex target type we | |
17260 | create will then be nameless. */ | |
a12e5744 | 17261 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17262 | tt = nullptr; |
17263 | ||
8bdc1658 | 17264 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
103a685e | 17265 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
17266 | } |
17267 | ||
c906108c SS |
17268 | /* Find a representation of a given base type and install |
17269 | it in the TYPE field of the die. */ | |
17270 | ||
f792889a | 17271 | static struct type * |
e7c27a73 | 17272 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17273 | { |
518817b3 | 17274 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
17275 | struct type *type; |
17276 | struct attribute *attr; | |
19f392bc | 17277 | int encoding = 0, bits = 0; |
15d034d0 | 17278 | const char *name; |
34877895 | 17279 | gdbarch *arch; |
c906108c | 17280 | |
e142c38c | 17281 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
435d3d88 | 17282 | if (attr != nullptr) |
34877895 | 17283 | encoding = DW_UNSND (attr); |
e142c38c | 17284 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17285 | if (attr != nullptr) |
34877895 | 17286 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
39cbfefa | 17287 | name = dwarf2_name (die, cu); |
6ccb9162 | 17288 | if (!name) |
34877895 | 17289 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e | 17290 | |
08feed99 | 17291 | arch = objfile->arch (); |
103a685e TT |
17292 | enum bfd_endian byte_order = gdbarch_byte_order (arch); |
17293 | ||
34877895 PJ |
17294 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
17295 | if (attr) | |
103a685e TT |
17296 | { |
17297 | int endianity = DW_UNSND (attr); | |
17298 | ||
17299 | switch (endianity) | |
17300 | { | |
17301 | case DW_END_big: | |
17302 | byte_order = BFD_ENDIAN_BIG; | |
17303 | break; | |
17304 | case DW_END_little: | |
17305 | byte_order = BFD_ENDIAN_LITTLE; | |
17306 | break; | |
17307 | default: | |
17308 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
17309 | break; | |
17310 | } | |
17311 | } | |
6ccb9162 UW |
17312 | |
17313 | switch (encoding) | |
c906108c | 17314 | { |
6ccb9162 UW |
17315 | case DW_ATE_address: |
17316 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17317 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17318 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17319 | break; |
17320 | case DW_ATE_boolean: | |
19f392bc | 17321 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17322 | break; |
17323 | case DW_ATE_complex_float: | |
103a685e TT |
17324 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
17325 | byte_order); | |
78134374 | 17326 | if (type->code () == TYPE_CODE_ERROR) |
93689ce9 TT |
17327 | { |
17328 | if (name == nullptr) | |
17329 | { | |
17330 | struct obstack *obstack | |
17331 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
17332 | name = obconcat (obstack, "_Complex ", TYPE_NAME (type), | |
17333 | nullptr); | |
17334 | } | |
17335 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); | |
17336 | } | |
17337 | else | |
17338 | type = init_complex_type (name, type); | |
6ccb9162 UW |
17339 | break; |
17340 | case DW_ATE_decimal_float: | |
19f392bc | 17341 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17342 | break; |
17343 | case DW_ATE_float: | |
103a685e | 17344 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
17345 | break; |
17346 | case DW_ATE_signed: | |
eb77c9df | 17347 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17348 | break; |
17349 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17350 | if (cu->language == language_fortran |
17351 | && name | |
61012eef | 17352 | && startswith (name, "character(")) |
19f392bc UW |
17353 | type = init_character_type (objfile, bits, 1, name); |
17354 | else | |
eb77c9df | 17355 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17356 | break; |
17357 | case DW_ATE_signed_char: | |
6e70227d | 17358 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17359 | || cu->language == language_pascal |
17360 | || cu->language == language_fortran) | |
19f392bc UW |
17361 | type = init_character_type (objfile, bits, 0, name); |
17362 | else | |
eb77c9df | 17363 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17364 | break; |
17365 | case DW_ATE_unsigned_char: | |
868a0084 | 17366 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17367 | || cu->language == language_pascal |
c44af4eb TT |
17368 | || cu->language == language_fortran |
17369 | || cu->language == language_rust) | |
19f392bc UW |
17370 | type = init_character_type (objfile, bits, 1, name); |
17371 | else | |
eb77c9df | 17372 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17373 | break; |
75079b2b | 17374 | case DW_ATE_UTF: |
53e710ac | 17375 | { |
53e710ac PA |
17376 | if (bits == 16) |
17377 | type = builtin_type (arch)->builtin_char16; | |
17378 | else if (bits == 32) | |
17379 | type = builtin_type (arch)->builtin_char32; | |
17380 | else | |
17381 | { | |
b98664d3 | 17382 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17383 | bits); |
eb77c9df | 17384 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17385 | } |
17386 | return set_die_type (die, type, cu); | |
17387 | } | |
75079b2b TT |
17388 | break; |
17389 | ||
6ccb9162 | 17390 | default: |
b98664d3 | 17391 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17392 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17393 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17394 | break; |
c906108c | 17395 | } |
6ccb9162 | 17396 | |
0114d602 | 17397 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17398 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17399 | |
2b4424c3 TT |
17400 | maybe_set_alignment (cu, die, type); |
17401 | ||
103a685e | 17402 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
34877895 | 17403 | |
f792889a | 17404 | return set_die_type (die, type, cu); |
c906108c SS |
17405 | } |
17406 | ||
80180f79 SA |
17407 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17408 | resulting value of the attribute into struct bound_prop. | |
17409 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17410 | ||
17411 | static int | |
17412 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17413 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17414 | struct type *default_type) | |
80180f79 SA |
17415 | { |
17416 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17417 | struct obstack *obstack |
17418 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17419 | |
9a49df9d AB |
17420 | gdb_assert (default_type != NULL); |
17421 | ||
80180f79 SA |
17422 | if (attr == NULL || prop == NULL) |
17423 | return 0; | |
17424 | ||
4fc6c0d5 | 17425 | if (attr->form_is_block ()) |
80180f79 | 17426 | { |
8d749320 | 17427 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17428 | baton->property_type = default_type; |
80180f79 SA |
17429 | baton->locexpr.per_cu = cu->per_cu; |
17430 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17431 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
216a7e6b AB |
17432 | switch (attr->name) |
17433 | { | |
17434 | case DW_AT_string_length: | |
17435 | baton->locexpr.is_reference = true; | |
17436 | break; | |
17437 | default: | |
17438 | baton->locexpr.is_reference = false; | |
17439 | break; | |
17440 | } | |
80180f79 SA |
17441 | prop->data.baton = baton; |
17442 | prop->kind = PROP_LOCEXPR; | |
17443 | gdb_assert (prop->data.baton != NULL); | |
17444 | } | |
cd6c91b4 | 17445 | else if (attr->form_is_ref ()) |
80180f79 SA |
17446 | { |
17447 | struct dwarf2_cu *target_cu = cu; | |
17448 | struct die_info *target_die; | |
17449 | struct attribute *target_attr; | |
17450 | ||
17451 | target_die = follow_die_ref (die, attr, &target_cu); | |
17452 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17453 | if (target_attr == NULL) |
17454 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17455 | target_cu); | |
80180f79 SA |
17456 | if (target_attr == NULL) |
17457 | return 0; | |
17458 | ||
df25ebbd | 17459 | switch (target_attr->name) |
80180f79 | 17460 | { |
df25ebbd | 17461 | case DW_AT_location: |
cd6c91b4 | 17462 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 17463 | { |
8d749320 | 17464 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17465 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17466 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17467 | prop->data.baton = baton; | |
17468 | prop->kind = PROP_LOCLIST; | |
17469 | gdb_assert (prop->data.baton != NULL); | |
17470 | } | |
4fc6c0d5 | 17471 | else if (target_attr->form_is_block ()) |
df25ebbd | 17472 | { |
8d749320 | 17473 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17474 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17475 | baton->locexpr.per_cu = cu->per_cu; |
17476 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17477 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17478 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17479 | prop->data.baton = baton; |
17480 | prop->kind = PROP_LOCEXPR; | |
17481 | gdb_assert (prop->data.baton != NULL); | |
17482 | } | |
17483 | else | |
17484 | { | |
17485 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17486 | "dynamic property"); | |
17487 | return 0; | |
17488 | } | |
17489 | break; | |
17490 | case DW_AT_data_member_location: | |
17491 | { | |
17492 | LONGEST offset; | |
17493 | ||
17494 | if (!handle_data_member_location (target_die, target_cu, | |
17495 | &offset)) | |
17496 | return 0; | |
17497 | ||
8d749320 | 17498 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17499 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17500 | target_cu); |
df25ebbd JB |
17501 | baton->offset_info.offset = offset; |
17502 | baton->offset_info.type = die_type (target_die, target_cu); | |
17503 | prop->data.baton = baton; | |
17504 | prop->kind = PROP_ADDR_OFFSET; | |
17505 | break; | |
17506 | } | |
80180f79 SA |
17507 | } |
17508 | } | |
cd6c91b4 | 17509 | else if (attr->form_is_constant ()) |
80180f79 | 17510 | { |
0826b30a | 17511 | prop->data.const_val = attr->constant_value (0); |
80180f79 SA |
17512 | prop->kind = PROP_CONST; |
17513 | } | |
17514 | else | |
17515 | { | |
17516 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17517 | dwarf2_name (die, cu)); | |
17518 | return 0; | |
17519 | } | |
17520 | ||
17521 | return 1; | |
17522 | } | |
17523 | ||
09ba997f | 17524 | /* See read.h. */ |
9a49df9d | 17525 | |
09ba997f TT |
17526 | struct type * |
17527 | dwarf2_per_cu_data::int_type (int size_in_bytes, bool unsigned_p) const | |
9a49df9d | 17528 | { |
09ba997f | 17529 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
17530 | struct type *int_type; |
17531 | ||
17532 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
17533 | #define TRY_TYPE(F) \ |
17534 | int_type = (unsigned_p \ | |
17535 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17536 | : objfile_type (objfile)->builtin_ ## F); \ | |
17537 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
17538 | return int_type |
17539 | ||
17540 | TRY_TYPE (char); | |
17541 | TRY_TYPE (short); | |
17542 | TRY_TYPE (int); | |
17543 | TRY_TYPE (long); | |
17544 | TRY_TYPE (long_long); | |
17545 | ||
17546 | #undef TRY_TYPE | |
17547 | ||
17548 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17549 | } | |
17550 | ||
09ba997f | 17551 | /* See read.h. */ |
11a8b164 | 17552 | |
09ba997f TT |
17553 | struct type * |
17554 | dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p) const | |
11a8b164 | 17555 | { |
09ba997f TT |
17556 | int addr_size = this->addr_size (); |
17557 | return int_type (addr_size, unsigned_p); | |
11a8b164 AB |
17558 | } |
17559 | ||
b86352cf AB |
17560 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17561 | present (which is valid) then compute the default type based on the | |
17562 | compilation units address size. */ | |
17563 | ||
17564 | static struct type * | |
17565 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17566 | { | |
17567 | struct type *index_type = die_type (die, cu); | |
17568 | ||
17569 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17570 | without specifying a base type. | |
17571 | In that case, the base type must be set to the type of | |
17572 | the lower bound, upper bound or count, in that order, if any of these | |
17573 | three attributes references an object that has a type. | |
17574 | If no base type is found, the Dwarf-2 specifications say that | |
17575 | a signed integer type of size equal to the size of an address should | |
17576 | be used. | |
17577 | For the following C code: `extern char gdb_int [];' | |
17578 | GCC produces an empty range DIE. | |
17579 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17580 | high bound or count are not yet handled by this code. */ | |
78134374 | 17581 | if (index_type->code () == TYPE_CODE_VOID) |
09ba997f | 17582 | index_type = cu->per_cu->addr_sized_int_type (false); |
b86352cf AB |
17583 | |
17584 | return index_type; | |
17585 | } | |
17586 | ||
a02abb62 JB |
17587 | /* Read the given DW_AT_subrange DIE. */ |
17588 | ||
f792889a | 17589 | static struct type * |
a02abb62 JB |
17590 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17591 | { | |
4c9ad8c2 | 17592 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17593 | struct type *range_type; |
17594 | struct attribute *attr; | |
729efb13 | 17595 | struct dynamic_prop low, high; |
4fae6e18 | 17596 | int low_default_is_valid; |
c451ebe5 | 17597 | int high_bound_is_count = 0; |
15d034d0 | 17598 | const char *name; |
d359392f | 17599 | ULONGEST negative_mask; |
e77813c8 | 17600 | |
b86352cf AB |
17601 | orig_base_type = read_subrange_index_type (die, cu); |
17602 | ||
4c9ad8c2 TT |
17603 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17604 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17605 | creating the range type, but we use the result of check_typedef | |
17606 | when examining properties of the type. */ | |
17607 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17608 | |
7e314c57 JK |
17609 | /* The die_type call above may have already set the type for this DIE. */ |
17610 | range_type = get_die_type (die, cu); | |
17611 | if (range_type) | |
17612 | return range_type; | |
17613 | ||
729efb13 SA |
17614 | low.kind = PROP_CONST; |
17615 | high.kind = PROP_CONST; | |
17616 | high.data.const_val = 0; | |
17617 | ||
4fae6e18 JK |
17618 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17619 | omitting DW_AT_lower_bound. */ | |
17620 | switch (cu->language) | |
6e70227d | 17621 | { |
4fae6e18 JK |
17622 | case language_c: |
17623 | case language_cplus: | |
729efb13 | 17624 | low.data.const_val = 0; |
4fae6e18 JK |
17625 | low_default_is_valid = 1; |
17626 | break; | |
17627 | case language_fortran: | |
729efb13 | 17628 | low.data.const_val = 1; |
4fae6e18 JK |
17629 | low_default_is_valid = 1; |
17630 | break; | |
17631 | case language_d: | |
4fae6e18 | 17632 | case language_objc: |
c44af4eb | 17633 | case language_rust: |
729efb13 | 17634 | low.data.const_val = 0; |
4fae6e18 JK |
17635 | low_default_is_valid = (cu->header.version >= 4); |
17636 | break; | |
17637 | case language_ada: | |
17638 | case language_m2: | |
17639 | case language_pascal: | |
729efb13 | 17640 | low.data.const_val = 1; |
4fae6e18 JK |
17641 | low_default_is_valid = (cu->header.version >= 4); |
17642 | break; | |
17643 | default: | |
729efb13 | 17644 | low.data.const_val = 0; |
4fae6e18 JK |
17645 | low_default_is_valid = 0; |
17646 | break; | |
a02abb62 JB |
17647 | } |
17648 | ||
e142c38c | 17649 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 17650 | if (attr != nullptr) |
9a49df9d | 17651 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17652 | else if (!low_default_is_valid) |
b98664d3 | 17653 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17654 | "- DIE at %s [in module %s]"), |
17655 | sect_offset_str (die->sect_off), | |
518817b3 | 17656 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17657 | |
506f5c41 TV |
17658 | struct attribute *attr_ub, *attr_count; |
17659 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17660 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17661 | { |
506f5c41 | 17662 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17663 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17664 | { |
c451ebe5 SA |
17665 | /* If bounds are constant do the final calculation here. */ |
17666 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17667 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17668 | else | |
17669 | high_bound_is_count = 1; | |
c2ff108b | 17670 | } |
506f5c41 TV |
17671 | else |
17672 | { | |
17673 | if (attr_ub != NULL) | |
17674 | complaint (_("Unresolved DW_AT_upper_bound " | |
17675 | "- DIE at %s [in module %s]"), | |
17676 | sect_offset_str (die->sect_off), | |
17677 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17678 | if (attr_count != NULL) | |
17679 | complaint (_("Unresolved DW_AT_count " | |
17680 | "- DIE at %s [in module %s]"), | |
17681 | sect_offset_str (die->sect_off), | |
17682 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17683 | } | |
e77813c8 | 17684 | } |
a02abb62 | 17685 | |
4e962e74 TT |
17686 | LONGEST bias = 0; |
17687 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 17688 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
0826b30a | 17689 | bias = bias_attr->constant_value (0); |
4e962e74 | 17690 | |
dbb9c2b1 JB |
17691 | /* Normally, the DWARF producers are expected to use a signed |
17692 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17693 | But this is unfortunately not always the case, as witnessed | |
17694 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17695 | is used instead. To work around that ambiguity, we treat | |
17696 | the bounds as signed, and thus sign-extend their values, when | |
17697 | the base type is signed. */ | |
6e70227d | 17698 | negative_mask = |
d359392f | 17699 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17700 | if (low.kind == PROP_CONST |
17701 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17702 | low.data.const_val |= negative_mask; | |
17703 | if (high.kind == PROP_CONST | |
17704 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17705 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17706 | |
5bbd8269 AB |
17707 | /* Check for bit and byte strides. */ |
17708 | struct dynamic_prop byte_stride_prop; | |
17709 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
17710 | if (attr_byte_stride != nullptr) | |
17711 | { | |
09ba997f | 17712 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17713 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
17714 | prop_type); | |
17715 | } | |
17716 | ||
17717 | struct dynamic_prop bit_stride_prop; | |
17718 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
17719 | if (attr_bit_stride != nullptr) | |
17720 | { | |
17721 | /* It only makes sense to have either a bit or byte stride. */ | |
17722 | if (attr_byte_stride != nullptr) | |
17723 | { | |
17724 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
17725 | "- DIE at %s [in module %s]"), | |
17726 | sect_offset_str (die->sect_off), | |
17727 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17728 | attr_bit_stride = nullptr; | |
17729 | } | |
17730 | else | |
17731 | { | |
09ba997f | 17732 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17733 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
17734 | prop_type); | |
17735 | } | |
17736 | } | |
17737 | ||
17738 | if (attr_byte_stride != nullptr | |
17739 | || attr_bit_stride != nullptr) | |
17740 | { | |
17741 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
17742 | struct dynamic_prop *stride | |
17743 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
17744 | ||
17745 | range_type | |
17746 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
17747 | &high, bias, stride, byte_stride_p); | |
17748 | } | |
17749 | else | |
17750 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 17751 | |
c451ebe5 SA |
17752 | if (high_bound_is_count) |
17753 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17754 | ||
c2ff108b JK |
17755 | /* Ada expects an empty array on no boundary attributes. */ |
17756 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17757 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17758 | |
39cbfefa DJ |
17759 | name = dwarf2_name (die, cu); |
17760 | if (name) | |
17761 | TYPE_NAME (range_type) = name; | |
6e70227d | 17762 | |
e142c38c | 17763 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17764 | if (attr != nullptr) |
a02abb62 JB |
17765 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
17766 | ||
2b4424c3 TT |
17767 | maybe_set_alignment (cu, die, range_type); |
17768 | ||
7e314c57 JK |
17769 | set_die_type (die, range_type, cu); |
17770 | ||
17771 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17772 | set_descriptive_type (range_type, die, cu); |
17773 | ||
7e314c57 | 17774 | return range_type; |
a02abb62 | 17775 | } |
6e70227d | 17776 | |
f792889a | 17777 | static struct type * |
81a17f79 JB |
17778 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17779 | { | |
17780 | struct type *type; | |
81a17f79 | 17781 | |
518817b3 SM |
17782 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17783 | NULL); | |
0114d602 | 17784 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17785 | |
74a2f8ff | 17786 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 17787 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
17788 | such a type, we treat it as a stub, and try to resolve it later on, |
17789 | when needed. */ | |
17790 | if (cu->language == language_ada) | |
17791 | TYPE_STUB (type) = 1; | |
17792 | ||
f792889a | 17793 | return set_die_type (die, type, cu); |
81a17f79 | 17794 | } |
a02abb62 | 17795 | |
639d11d3 DC |
17796 | /* Read a single die and all its descendents. Set the die's sibling |
17797 | field to NULL; set other fields in the die correctly, and set all | |
17798 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17799 | location of the info_ptr after reading all of those dies. PARENT | |
17800 | is the parent of the die in question. */ | |
17801 | ||
17802 | static struct die_info * | |
dee91e82 | 17803 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17804 | const gdb_byte *info_ptr, |
17805 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17806 | struct die_info *parent) |
639d11d3 DC |
17807 | { |
17808 | struct die_info *die; | |
d521ce57 | 17809 | const gdb_byte *cur_ptr; |
639d11d3 | 17810 | |
3e225074 | 17811 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
17812 | if (die == NULL) |
17813 | { | |
17814 | *new_info_ptr = cur_ptr; | |
17815 | return NULL; | |
17816 | } | |
93311388 | 17817 | store_in_ref_table (die, reader->cu); |
639d11d3 | 17818 | |
3e225074 | 17819 | if (die->has_children) |
bf6af496 | 17820 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17821 | else |
17822 | { | |
17823 | die->child = NULL; | |
17824 | *new_info_ptr = cur_ptr; | |
17825 | } | |
17826 | ||
17827 | die->sibling = NULL; | |
17828 | die->parent = parent; | |
17829 | return die; | |
17830 | } | |
17831 | ||
17832 | /* Read a die, all of its descendents, and all of its siblings; set | |
17833 | all of the fields of all of the dies correctly. Arguments are as | |
17834 | in read_die_and_children. */ | |
17835 | ||
17836 | static struct die_info * | |
bf6af496 | 17837 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17838 | const gdb_byte *info_ptr, |
17839 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17840 | struct die_info *parent) |
639d11d3 DC |
17841 | { |
17842 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17843 | const gdb_byte *cur_ptr; |
639d11d3 | 17844 | |
c906108c | 17845 | cur_ptr = info_ptr; |
639d11d3 DC |
17846 | first_die = last_sibling = NULL; |
17847 | ||
17848 | while (1) | |
c906108c | 17849 | { |
639d11d3 | 17850 | struct die_info *die |
dee91e82 | 17851 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17852 | |
1d325ec1 | 17853 | if (die == NULL) |
c906108c | 17854 | { |
639d11d3 DC |
17855 | *new_info_ptr = cur_ptr; |
17856 | return first_die; | |
c906108c | 17857 | } |
1d325ec1 DJ |
17858 | |
17859 | if (!first_die) | |
17860 | first_die = die; | |
c906108c | 17861 | else |
1d325ec1 DJ |
17862 | last_sibling->sibling = die; |
17863 | ||
17864 | last_sibling = die; | |
c906108c | 17865 | } |
c906108c SS |
17866 | } |
17867 | ||
bf6af496 DE |
17868 | /* Read a die, all of its descendents, and all of its siblings; set |
17869 | all of the fields of all of the dies correctly. Arguments are as | |
17870 | in read_die_and_children. | |
17871 | This the main entry point for reading a DIE and all its children. */ | |
17872 | ||
17873 | static struct die_info * | |
17874 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17875 | const gdb_byte *info_ptr, |
17876 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17877 | struct die_info *parent) |
17878 | { | |
17879 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17880 | new_info_ptr, parent); | |
17881 | ||
b4f54984 | 17882 | if (dwarf_die_debug) |
bf6af496 DE |
17883 | { |
17884 | fprintf_unfiltered (gdb_stdlog, | |
17885 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17886 | reader->die_section->get_name (), |
bf6af496 DE |
17887 | (unsigned) (info_ptr - reader->die_section->buffer), |
17888 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17889 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17890 | } |
17891 | ||
17892 | return die; | |
17893 | } | |
17894 | ||
3019eac3 DE |
17895 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17896 | attributes. | |
17897 | The caller is responsible for filling in the extra attributes | |
17898 | and updating (*DIEP)->num_attrs. | |
17899 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17900 | except for its child, sibling, and parent fields. */ |
93311388 | 17901 | |
d521ce57 | 17902 | static const gdb_byte * |
3019eac3 | 17903 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17904 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 17905 | int num_extra_attrs) |
93311388 | 17906 | { |
b64f50a1 | 17907 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17908 | struct abbrev_info *abbrev; |
17909 | struct die_info *die; | |
17910 | struct dwarf2_cu *cu = reader->cu; | |
17911 | bfd *abfd = reader->abfd; | |
17912 | ||
9c541725 | 17913 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17914 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17915 | info_ptr += bytes_read; | |
17916 | if (!abbrev_number) | |
17917 | { | |
17918 | *diep = NULL; | |
93311388 DE |
17919 | return info_ptr; |
17920 | } | |
17921 | ||
685af9cd | 17922 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 17923 | if (!abbrev) |
348e048f DE |
17924 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17925 | abbrev_number, | |
17926 | bfd_get_filename (abfd)); | |
17927 | ||
3019eac3 | 17928 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17929 | die->sect_off = sect_off; |
93311388 DE |
17930 | die->tag = abbrev->tag; |
17931 | die->abbrev = abbrev_number; | |
3e225074 | 17932 | die->has_children = abbrev->has_children; |
93311388 | 17933 | |
3019eac3 DE |
17934 | /* Make the result usable. |
17935 | The caller needs to update num_attrs after adding the extra | |
17936 | attributes. */ | |
93311388 DE |
17937 | die->num_attrs = abbrev->num_attrs; |
17938 | ||
18a8505e | 17939 | std::vector<int> indexes_that_need_reprocess; |
93311388 | 17940 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e AT |
17941 | { |
17942 | bool need_reprocess; | |
17943 | info_ptr = | |
17944 | read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], | |
17945 | info_ptr, &need_reprocess); | |
17946 | if (need_reprocess) | |
17947 | indexes_that_need_reprocess.push_back (i); | |
17948 | } | |
17949 | ||
052c8bb8 | 17950 | struct attribute *attr = die->attr (DW_AT_str_offsets_base); |
18a8505e AT |
17951 | if (attr != nullptr) |
17952 | cu->str_offsets_base = DW_UNSND (attr); | |
93311388 | 17953 | |
41144253 | 17954 | attr = die->attr (DW_AT_loclists_base); |
17955 | if (attr != nullptr) | |
17956 | cu->loclist_base = DW_UNSND (attr); | |
17957 | ||
a39fdb41 | 17958 | auto maybe_addr_base = die->addr_base (); |
18a8505e AT |
17959 | if (maybe_addr_base.has_value ()) |
17960 | cu->addr_base = *maybe_addr_base; | |
17961 | for (int index : indexes_that_need_reprocess) | |
17962 | read_attribute_reprocess (reader, &die->attrs[index]); | |
93311388 | 17963 | *diep = die; |
93311388 DE |
17964 | return info_ptr; |
17965 | } | |
17966 | ||
3019eac3 DE |
17967 | /* Read a die and all its attributes. |
17968 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17969 | except for its child, sibling, and parent fields. */ |
3019eac3 | 17970 | |
d521ce57 | 17971 | static const gdb_byte * |
3019eac3 | 17972 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 17973 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 17974 | { |
d521ce57 | 17975 | const gdb_byte *result; |
bf6af496 | 17976 | |
3e225074 | 17977 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 17978 | |
b4f54984 | 17979 | if (dwarf_die_debug) |
bf6af496 DE |
17980 | { |
17981 | fprintf_unfiltered (gdb_stdlog, | |
17982 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17983 | reader->die_section->get_name (), |
bf6af496 DE |
17984 | (unsigned) (info_ptr - reader->die_section->buffer), |
17985 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17986 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17987 | } |
17988 | ||
17989 | return result; | |
3019eac3 | 17990 | } |
433df2d4 | 17991 | \f |
c906108c | 17992 | |
72bf9492 DJ |
17993 | /* Returns nonzero if TAG represents a type that we might generate a partial |
17994 | symbol for. */ | |
17995 | ||
17996 | static int | |
17997 | is_type_tag_for_partial (int tag) | |
17998 | { | |
17999 | switch (tag) | |
18000 | { | |
18001 | #if 0 | |
18002 | /* Some types that would be reasonable to generate partial symbols for, | |
18003 | that we don't at present. */ | |
18004 | case DW_TAG_array_type: | |
18005 | case DW_TAG_file_type: | |
18006 | case DW_TAG_ptr_to_member_type: | |
18007 | case DW_TAG_set_type: | |
18008 | case DW_TAG_string_type: | |
18009 | case DW_TAG_subroutine_type: | |
18010 | #endif | |
18011 | case DW_TAG_base_type: | |
18012 | case DW_TAG_class_type: | |
680b30c7 | 18013 | case DW_TAG_interface_type: |
72bf9492 DJ |
18014 | case DW_TAG_enumeration_type: |
18015 | case DW_TAG_structure_type: | |
18016 | case DW_TAG_subrange_type: | |
18017 | case DW_TAG_typedef: | |
18018 | case DW_TAG_union_type: | |
18019 | return 1; | |
18020 | default: | |
18021 | return 0; | |
18022 | } | |
18023 | } | |
18024 | ||
18025 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18026 | ||
18027 | static struct partial_die_info * | |
dee91e82 | 18028 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18029 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18030 | { |
dee91e82 | 18031 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 18032 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 18033 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18034 | unsigned int bytes_read; |
5afb4e99 | 18035 | unsigned int load_all = 0; |
72bf9492 DJ |
18036 | int nesting_level = 1; |
18037 | ||
18038 | parent_die = NULL; | |
18039 | last_die = NULL; | |
18040 | ||
7adf1e79 DE |
18041 | gdb_assert (cu->per_cu != NULL); |
18042 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18043 | load_all = 1; |
18044 | ||
72bf9492 DJ |
18045 | cu->partial_dies |
18046 | = htab_create_alloc_ex (cu->header.length / 12, | |
18047 | partial_die_hash, | |
18048 | partial_die_eq, | |
18049 | NULL, | |
18050 | &cu->comp_unit_obstack, | |
18051 | hashtab_obstack_allocate, | |
18052 | dummy_obstack_deallocate); | |
18053 | ||
72bf9492 DJ |
18054 | while (1) |
18055 | { | |
685af9cd | 18056 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
18057 | |
18058 | /* A NULL abbrev means the end of a series of children. */ | |
18059 | if (abbrev == NULL) | |
18060 | { | |
18061 | if (--nesting_level == 0) | |
cd9983dd YQ |
18062 | return first_die; |
18063 | ||
72bf9492 DJ |
18064 | info_ptr += bytes_read; |
18065 | last_die = parent_die; | |
18066 | parent_die = parent_die->die_parent; | |
18067 | continue; | |
18068 | } | |
18069 | ||
98bfdba5 PA |
18070 | /* Check for template arguments. We never save these; if |
18071 | they're seen, we just mark the parent, and go on our way. */ | |
18072 | if (parent_die != NULL | |
18073 | && cu->language == language_cplus | |
18074 | && (abbrev->tag == DW_TAG_template_type_param | |
18075 | || abbrev->tag == DW_TAG_template_value_param)) | |
18076 | { | |
18077 | parent_die->has_template_arguments = 1; | |
18078 | ||
18079 | if (!load_all) | |
18080 | { | |
18081 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18082 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18083 | continue; |
18084 | } | |
18085 | } | |
18086 | ||
0d99eb77 | 18087 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18088 | Skip their other children. */ |
18089 | if (!load_all | |
18090 | && cu->language == language_cplus | |
18091 | && parent_die != NULL | |
18092 | && parent_die->tag == DW_TAG_subprogram) | |
18093 | { | |
dee91e82 | 18094 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18095 | continue; |
18096 | } | |
18097 | ||
5afb4e99 DJ |
18098 | /* Check whether this DIE is interesting enough to save. Normally |
18099 | we would not be interested in members here, but there may be | |
18100 | later variables referencing them via DW_AT_specification (for | |
18101 | static members). */ | |
18102 | if (!load_all | |
18103 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18104 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18105 | && abbrev->tag != DW_TAG_enumerator |
18106 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18107 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18108 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18109 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18110 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18111 | && abbrev->tag != DW_TAG_module |
95554aad | 18112 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18113 | && abbrev->tag != DW_TAG_imported_unit |
18114 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18115 | { |
18116 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18117 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18118 | continue; |
18119 | } | |
18120 | ||
6f06d47b YQ |
18121 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18122 | abbrev); | |
cd9983dd | 18123 | |
48fbe735 | 18124 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18125 | |
18126 | /* This two-pass algorithm for processing partial symbols has a | |
18127 | high cost in cache pressure. Thus, handle some simple cases | |
18128 | here which cover the majority of C partial symbols. DIEs | |
18129 | which neither have specification tags in them, nor could have | |
18130 | specification tags elsewhere pointing at them, can simply be | |
18131 | processed and discarded. | |
18132 | ||
18133 | This segment is also optional; scan_partial_symbols and | |
18134 | add_partial_symbol will handle these DIEs if we chain | |
18135 | them in normally. When compilers which do not emit large | |
18136 | quantities of duplicate debug information are more common, | |
18137 | this code can probably be removed. */ | |
18138 | ||
18139 | /* Any complete simple types at the top level (pretty much all | |
18140 | of them, for a language without namespaces), can be processed | |
18141 | directly. */ | |
18142 | if (parent_die == NULL | |
cd9983dd YQ |
18143 | && pdi.has_specification == 0 |
18144 | && pdi.is_declaration == 0 | |
18145 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18146 | || pdi.tag == DW_TAG_base_type | |
18147 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 18148 | { |
cd9983dd | 18149 | if (building_psymtab && pdi.name != NULL) |
31edb802 | 18150 | add_psymbol_to_list (pdi.name, false, |
79748972 | 18151 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 18152 | psymbol_placement::STATIC, |
1762568f | 18153 | 0, cu->language, objfile); |
cd9983dd | 18154 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18155 | continue; |
18156 | } | |
18157 | ||
d8228535 JK |
18158 | /* The exception for DW_TAG_typedef with has_children above is |
18159 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18160 | type_name_or_error will error on such types later. |
d8228535 JK |
18161 | |
18162 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18163 | it could not find the child DIEs referenced later, this is checked | |
18164 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18165 | ||
cd9983dd | 18166 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18167 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18168 | "- DIE at %s [in module %s]"), |
cd9983dd | 18169 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18170 | |
72bf9492 DJ |
18171 | /* If we're at the second level, and we're an enumerator, and |
18172 | our parent has no specification (meaning possibly lives in a | |
18173 | namespace elsewhere), then we can add the partial symbol now | |
18174 | instead of queueing it. */ | |
cd9983dd | 18175 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18176 | && parent_die != NULL |
18177 | && parent_die->die_parent == NULL | |
18178 | && parent_die->tag == DW_TAG_enumeration_type | |
18179 | && parent_die->has_specification == 0) | |
18180 | { | |
cd9983dd | 18181 | if (pdi.name == NULL) |
b98664d3 | 18182 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18183 | else if (building_psymtab) |
31edb802 | 18184 | add_psymbol_to_list (pdi.name, false, |
79748972 | 18185 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 18186 | cu->language == language_cplus |
75aedd27 TT |
18187 | ? psymbol_placement::GLOBAL |
18188 | : psymbol_placement::STATIC, | |
1762568f | 18189 | 0, cu->language, objfile); |
72bf9492 | 18190 | |
cd9983dd | 18191 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18192 | continue; |
18193 | } | |
18194 | ||
cd9983dd | 18195 | struct partial_die_info *part_die |
6f06d47b | 18196 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18197 | |
72bf9492 DJ |
18198 | /* We'll save this DIE so link it in. */ |
18199 | part_die->die_parent = parent_die; | |
18200 | part_die->die_sibling = NULL; | |
18201 | part_die->die_child = NULL; | |
18202 | ||
18203 | if (last_die && last_die == parent_die) | |
18204 | last_die->die_child = part_die; | |
18205 | else if (last_die) | |
18206 | last_die->die_sibling = part_die; | |
18207 | ||
18208 | last_die = part_die; | |
18209 | ||
18210 | if (first_die == NULL) | |
18211 | first_die = part_die; | |
18212 | ||
18213 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18214 | find interesting need to be in the hash table, because we | |
18215 | also have the parent/sibling/child chains; only those that we | |
18216 | might refer to by offset later during partial symbol reading. | |
18217 | ||
18218 | For now this means things that might have be the target of a | |
18219 | DW_AT_specification, DW_AT_abstract_origin, or | |
18220 | DW_AT_extension. DW_AT_extension will refer only to | |
18221 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18222 | many things under the function DIE, but we do not recurse | |
18223 | into function DIEs during partial symbol reading) and | |
18224 | possibly variables as well; DW_AT_specification refers to | |
18225 | declarations. Declarations ought to have the DW_AT_declaration | |
18226 | flag. It happens that GCC forgets to put it in sometimes, but | |
18227 | only for functions, not for types. | |
18228 | ||
18229 | Adding more things than necessary to the hash table is harmless | |
18230 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18231 | wasted time in find_partial_die, when we reread the compilation |
18232 | unit with load_all_dies set. */ | |
72bf9492 | 18233 | |
5afb4e99 | 18234 | if (load_all |
72929c62 | 18235 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18236 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18237 | || abbrev->tag == DW_TAG_variable |
18238 | || abbrev->tag == DW_TAG_namespace | |
18239 | || part_die->is_declaration) | |
18240 | { | |
18241 | void **slot; | |
18242 | ||
18243 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18244 | to_underlying (part_die->sect_off), |
18245 | INSERT); | |
72bf9492 DJ |
18246 | *slot = part_die; |
18247 | } | |
18248 | ||
72bf9492 | 18249 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 18250 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18251 | languages we have to, so that we can get at method physnames |
18252 | to infer fully qualified class names, for DW_AT_specification, | |
18253 | and for C++ template arguments. For C++, we also look one level | |
18254 | inside functions to find template arguments (if the name of the | |
18255 | function does not already contain the template arguments). | |
bc30ff58 | 18256 | |
0a4b0913 AB |
18257 | For Ada and Fortran, we need to scan the children of subprograms |
18258 | and lexical blocks as well because these languages allow the | |
18259 | definition of nested entities that could be interesting for the | |
18260 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 18261 | if (last_die->has_children |
5afb4e99 DJ |
18262 | && (load_all |
18263 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18264 | || last_die->tag == DW_TAG_module |
72bf9492 | 18265 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18266 | || (cu->language == language_cplus |
18267 | && last_die->tag == DW_TAG_subprogram | |
18268 | && (last_die->name == NULL | |
18269 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18270 | || (cu->language != language_c |
18271 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18272 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18273 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 18274 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
18275 | || ((cu->language == language_ada |
18276 | || cu->language == language_fortran) | |
bc30ff58 JB |
18277 | && (last_die->tag == DW_TAG_subprogram |
18278 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18279 | { |
18280 | nesting_level++; | |
18281 | parent_die = last_die; | |
18282 | continue; | |
18283 | } | |
18284 | ||
18285 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18286 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18287 | |
18288 | /* Back to the top, do it again. */ | |
18289 | } | |
18290 | } | |
18291 | ||
6f06d47b YQ |
18292 | partial_die_info::partial_die_info (sect_offset sect_off_, |
18293 | struct abbrev_info *abbrev) | |
18294 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
18295 | { | |
18296 | } | |
18297 | ||
35cc7ed7 YQ |
18298 | /* Read a minimal amount of information into the minimal die structure. |
18299 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 18300 | |
48fbe735 YQ |
18301 | const gdb_byte * |
18302 | partial_die_info::read (const struct die_reader_specs *reader, | |
18303 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 18304 | { |
dee91e82 | 18305 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18306 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18307 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 18308 | unsigned int i; |
c5aa993b | 18309 | int has_low_pc_attr = 0; |
c906108c | 18310 | int has_high_pc_attr = 0; |
91da1414 | 18311 | int high_pc_relative = 0; |
c906108c | 18312 | |
fd0a254f | 18313 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 18314 | { |
e7da7f8f | 18315 | attribute attr; |
18a8505e | 18316 | bool need_reprocess; |
e7da7f8f | 18317 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], |
18a8505e AT |
18318 | info_ptr, &need_reprocess); |
18319 | /* String and address offsets that need to do the reprocessing have | |
18320 | already been read at this point, so there is no need to wait until | |
18321 | the loop terminates to do the reprocessing. */ | |
18322 | if (need_reprocess) | |
e7da7f8f | 18323 | read_attribute_reprocess (reader, &attr); |
c906108c | 18324 | /* Store the data if it is of an attribute we want to keep in a |
c5aa993b | 18325 | partial symbol table. */ |
c906108c SS |
18326 | switch (attr.name) |
18327 | { | |
18328 | case DW_AT_name: | |
48fbe735 | 18329 | switch (tag) |
71c25dea TT |
18330 | { |
18331 | case DW_TAG_compile_unit: | |
95554aad | 18332 | case DW_TAG_partial_unit: |
348e048f | 18333 | case DW_TAG_type_unit: |
71c25dea TT |
18334 | /* Compilation units have a DW_AT_name that is a filename, not |
18335 | a source language identifier. */ | |
18336 | case DW_TAG_enumeration_type: | |
18337 | case DW_TAG_enumerator: | |
18338 | /* These tags always have simple identifiers already; no need | |
18339 | to canonicalize them. */ | |
48fbe735 | 18340 | name = DW_STRING (&attr); |
71c25dea TT |
18341 | break; |
18342 | default: | |
48fbe735 YQ |
18343 | { |
18344 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18345 | ||
18346 | name | |
be1e3d3e | 18347 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, objfile); |
48fbe735 | 18348 | } |
71c25dea TT |
18349 | break; |
18350 | } | |
c906108c | 18351 | break; |
31ef98ae | 18352 | case DW_AT_linkage_name: |
c906108c | 18353 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18354 | /* Note that both forms of linkage name might appear. We |
18355 | assume they will be the same, and we only store the last | |
18356 | one we see. */ | |
e61108c9 | 18357 | linkage_name = attr.value_as_string (); |
787de330 TT |
18358 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
18359 | See https://github.com/rust-lang/rust/issues/32925. */ | |
18360 | if (cu->language == language_rust && linkage_name != NULL | |
18361 | && strchr (linkage_name, '{') != NULL) | |
18362 | linkage_name = NULL; | |
c906108c SS |
18363 | break; |
18364 | case DW_AT_low_pc: | |
18365 | has_low_pc_attr = 1; | |
cd6c91b4 | 18366 | lowpc = attr.value_as_address (); |
c906108c SS |
18367 | break; |
18368 | case DW_AT_high_pc: | |
18369 | has_high_pc_attr = 1; | |
cd6c91b4 TT |
18370 | highpc = attr.value_as_address (); |
18371 | if (cu->header.version >= 4 && attr.form_is_constant ()) | |
31aa7e4e | 18372 | high_pc_relative = 1; |
c906108c SS |
18373 | break; |
18374 | case DW_AT_location: | |
0963b4bd | 18375 | /* Support the .debug_loc offsets. */ |
4fc6c0d5 | 18376 | if (attr.form_is_block ()) |
8e19ed76 | 18377 | { |
48fbe735 | 18378 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18379 | } |
cd6c91b4 | 18380 | else if (attr.form_is_section_offset ()) |
8e19ed76 | 18381 | { |
4d3c2250 | 18382 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18383 | } |
18384 | else | |
18385 | { | |
4d3c2250 KB |
18386 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18387 | "partial symbol information"); | |
8e19ed76 | 18388 | } |
c906108c | 18389 | break; |
c906108c | 18390 | case DW_AT_external: |
48fbe735 | 18391 | is_external = DW_UNSND (&attr); |
c906108c SS |
18392 | break; |
18393 | case DW_AT_declaration: | |
48fbe735 | 18394 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18395 | break; |
18396 | case DW_AT_type: | |
48fbe735 | 18397 | has_type = 1; |
c906108c SS |
18398 | break; |
18399 | case DW_AT_abstract_origin: | |
18400 | case DW_AT_specification: | |
72bf9492 | 18401 | case DW_AT_extension: |
48fbe735 | 18402 | has_specification = 1; |
0826b30a | 18403 | spec_offset = attr.get_ref_die_offset (); |
48fbe735 | 18404 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 | 18405 | || cu->per_cu->is_dwz); |
c906108c SS |
18406 | break; |
18407 | case DW_AT_sibling: | |
18408 | /* Ignore absolute siblings, they might point outside of | |
18409 | the current compile unit. */ | |
18410 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18411 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18412 | else |
b9502d3f | 18413 | { |
48fbe735 | 18414 | const gdb_byte *buffer = reader->buffer; |
0826b30a | 18415 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 18416 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
18417 | |
18418 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18419 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 18420 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 18421 | reader->die_section->overflow_complaint (); |
b9502d3f | 18422 | else |
48fbe735 | 18423 | sibling = sibling_ptr; |
b9502d3f | 18424 | } |
c906108c | 18425 | break; |
fa4028e9 | 18426 | case DW_AT_byte_size: |
48fbe735 | 18427 | has_byte_size = 1; |
fa4028e9 | 18428 | break; |
ff908ebf | 18429 | case DW_AT_const_value: |
48fbe735 | 18430 | has_const_value = 1; |
ff908ebf | 18431 | break; |
68511cec CES |
18432 | case DW_AT_calling_convention: |
18433 | /* DWARF doesn't provide a way to identify a program's source-level | |
18434 | entry point. DW_AT_calling_convention attributes are only meant | |
18435 | to describe functions' calling conventions. | |
18436 | ||
18437 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18438 | Fortran, and before DWARF 4 DW_CC_program was the only |
18439 | piece of debugging information whose definition refers to | |
18440 | a 'main program' at all, several compilers marked Fortran | |
18441 | main programs with DW_CC_program --- even when those | |
18442 | functions use the standard calling conventions. | |
18443 | ||
18444 | Although DWARF now specifies a way to provide this | |
18445 | information, we support this practice for backward | |
18446 | compatibility. */ | |
68511cec | 18447 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18448 | && cu->language == language_fortran) |
48fbe735 | 18449 | main_subprogram = 1; |
68511cec | 18450 | break; |
481860b3 GB |
18451 | case DW_AT_inline: |
18452 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18453 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18454 | may_be_inlined = 1; |
481860b3 | 18455 | break; |
95554aad TT |
18456 | |
18457 | case DW_AT_import: | |
48fbe735 | 18458 | if (tag == DW_TAG_imported_unit) |
36586728 | 18459 | { |
0826b30a | 18460 | d.sect_off = attr.get_ref_die_offset (); |
48fbe735 | 18461 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 TT |
18462 | || cu->per_cu->is_dwz); |
18463 | } | |
95554aad TT |
18464 | break; |
18465 | ||
0c1b455e | 18466 | case DW_AT_main_subprogram: |
48fbe735 | 18467 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18468 | break; |
18469 | ||
05caa1d2 TT |
18470 | case DW_AT_ranges: |
18471 | { | |
18472 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18473 | but that requires a full DIE, so instead we just | |
18474 | reimplement it. */ | |
18475 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18476 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18477 | + (need_ranges_base | |
18478 | ? cu->ranges_base | |
18479 | : 0)); | |
18480 | ||
18481 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18482 | .debug_ranges section. */ | |
18483 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18484 | nullptr)) | |
18485 | has_pc_info = 1; | |
18486 | } | |
18487 | break; | |
18488 | ||
c906108c SS |
18489 | default: |
18490 | break; | |
18491 | } | |
18492 | } | |
18493 | ||
10d06d82 TT |
18494 | /* For Ada, if both the name and the linkage name appear, we prefer |
18495 | the latter. This lets "catch exception" work better, regardless | |
18496 | of the order in which the name and linkage name were emitted. | |
18497 | Really, though, this is just a workaround for the fact that gdb | |
18498 | doesn't store both the name and the linkage name. */ | |
18499 | if (cu->language == language_ada && linkage_name != nullptr) | |
18500 | name = linkage_name; | |
18501 | ||
91da1414 | 18502 | if (high_pc_relative) |
48fbe735 | 18503 | highpc += lowpc; |
91da1414 | 18504 | |
9373cf26 JK |
18505 | if (has_low_pc_attr && has_high_pc_attr) |
18506 | { | |
18507 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18508 | eliminate duplicate copies of functions and vtables and such. | |
18509 | The linker will arbitrarily choose one and discard the others. | |
18510 | The AT_*_pc values for such functions refer to local labels in | |
18511 | these sections. If the section from that file was discarded, the | |
18512 | labels are not in the output, so the relocs get a value of 0. | |
18513 | If this is a discarded function, mark the pc bounds as invalid, | |
18514 | so that GDB will ignore it. */ | |
48fbe735 | 18515 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18516 | { |
48fbe735 | 18517 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 18518 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 18519 | |
b98664d3 | 18520 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18521 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18522 | paddress (gdbarch, lowpc), |
18523 | sect_offset_str (sect_off), | |
9d8780f0 | 18524 | objfile_name (objfile)); |
9373cf26 JK |
18525 | } |
18526 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18527 | else if (lowpc >= highpc) |
9373cf26 | 18528 | { |
48fbe735 | 18529 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 18530 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 18531 | |
b98664d3 | 18532 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18533 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18534 | paddress (gdbarch, lowpc), |
18535 | paddress (gdbarch, highpc), | |
18536 | sect_offset_str (sect_off), | |
9c541725 | 18537 | objfile_name (objfile)); |
9373cf26 JK |
18538 | } |
18539 | else | |
48fbe735 | 18540 | has_pc_info = 1; |
9373cf26 | 18541 | } |
85cbf3d3 | 18542 | |
c906108c SS |
18543 | return info_ptr; |
18544 | } | |
18545 | ||
72bf9492 DJ |
18546 | /* Find a cached partial DIE at OFFSET in CU. */ |
18547 | ||
d590ff25 YQ |
18548 | struct partial_die_info * |
18549 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18550 | { |
18551 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18552 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18553 | |
9a3c8263 | 18554 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18555 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18556 | to_underlying (sect_off))); |
72bf9492 | 18557 | |
72bf9492 DJ |
18558 | return lookup_die; |
18559 | } | |
18560 | ||
348e048f DE |
18561 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18562 | except in the case of .debug_types DIEs which do not reference | |
18563 | outside their CU (they do however referencing other types via | |
55f1336d | 18564 | DW_FORM_ref_sig8). */ |
72bf9492 | 18565 | |
122cf0f2 | 18566 | static const struct cu_partial_die_info |
9c541725 | 18567 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18568 | { |
518817b3 SM |
18569 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18570 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18571 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18572 | struct dwarf2_per_cu_data *per_cu = NULL; |
18573 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18574 | |
36586728 | 18575 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 18576 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 18577 | { |
d590ff25 | 18578 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18579 | if (pd != NULL) |
fb816e8b | 18580 | return { cu, pd }; |
0d99eb77 DE |
18581 | /* We missed recording what we needed. |
18582 | Load all dies and try again. */ | |
18583 | per_cu = cu->per_cu; | |
5afb4e99 | 18584 | } |
0d99eb77 DE |
18585 | else |
18586 | { | |
18587 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18588 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18589 | { |
9d8780f0 SM |
18590 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18591 | " external reference to offset %s [in module %s].\n"), | |
18592 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18593 | bfd_get_filename (objfile->obfd)); |
18594 | } | |
9c541725 | 18595 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18596 | dwarf2_per_objfile); |
72bf9492 | 18597 | |
0d99eb77 DE |
18598 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18599 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18600 | |
0d99eb77 | 18601 | per_cu->cu->last_used = 0; |
d590ff25 | 18602 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18603 | } |
5afb4e99 | 18604 | |
dee91e82 DE |
18605 | /* If we didn't find it, and not all dies have been loaded, |
18606 | load them all and try again. */ | |
18607 | ||
5afb4e99 DJ |
18608 | if (pd == NULL && per_cu->load_all_dies == 0) |
18609 | { | |
5afb4e99 | 18610 | per_cu->load_all_dies = 1; |
fd820528 DE |
18611 | |
18612 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18613 | THIS_CU->cu may already be in use. So we can't just free it and | |
18614 | replace its DIEs with the ones we read in. Instead, we leave those | |
18615 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18616 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18617 | set. */ | |
dee91e82 | 18618 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18619 | |
d590ff25 | 18620 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18621 | } |
18622 | ||
18623 | if (pd == NULL) | |
18624 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18625 | _("could not find partial DIE %s " |
3e43a32a | 18626 | "in cache [from module %s]\n"), |
9d8780f0 | 18627 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 18628 | return { per_cu->cu, pd }; |
72bf9492 DJ |
18629 | } |
18630 | ||
abc72ce4 DE |
18631 | /* See if we can figure out if the class lives in a namespace. We do |
18632 | this by looking for a member function; its demangled name will | |
18633 | contain namespace info, if there is any. */ | |
18634 | ||
18635 | static void | |
18636 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18637 | struct dwarf2_cu *cu) | |
18638 | { | |
18639 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18640 | what template types look like, because the demangler | |
18641 | frequently doesn't give the same name as the debug info. We | |
18642 | could fix this by only using the demangled name to get the | |
18643 | prefix (but see comment in read_structure_type). */ | |
18644 | ||
18645 | struct partial_die_info *real_pdi; | |
18646 | struct partial_die_info *child_pdi; | |
18647 | ||
18648 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18649 | we should not do this. We'll prepend the parent's fully qualified | |
18650 | name when we create the partial symbol. */ | |
18651 | ||
18652 | real_pdi = struct_pdi; | |
18653 | while (real_pdi->has_specification) | |
fb816e8b | 18654 | { |
122cf0f2 AB |
18655 | auto res = find_partial_die (real_pdi->spec_offset, |
18656 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
18657 | real_pdi = res.pdi; |
18658 | cu = res.cu; | |
18659 | } | |
abc72ce4 DE |
18660 | |
18661 | if (real_pdi->die_parent != NULL) | |
18662 | return; | |
18663 | ||
18664 | for (child_pdi = struct_pdi->die_child; | |
18665 | child_pdi != NULL; | |
18666 | child_pdi = child_pdi->die_sibling) | |
18667 | { | |
18668 | if (child_pdi->tag == DW_TAG_subprogram | |
18669 | && child_pdi->linkage_name != NULL) | |
18670 | { | |
43816ebc TT |
18671 | gdb::unique_xmalloc_ptr<char> actual_class_name |
18672 | (language_class_name_from_physname (cu->language_defn, | |
18673 | child_pdi->linkage_name)); | |
abc72ce4 DE |
18674 | if (actual_class_name != NULL) |
18675 | { | |
518817b3 | 18676 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18677 | struct_pdi->name = objfile->intern (actual_class_name.get ()); |
abc72ce4 DE |
18678 | } |
18679 | break; | |
18680 | } | |
18681 | } | |
18682 | } | |
18683 | ||
25c11aca TV |
18684 | /* Return true if a DIE with TAG may have the DW_AT_const_value |
18685 | attribute. */ | |
18686 | ||
18687 | static bool | |
18688 | can_have_DW_AT_const_value_p (enum dwarf_tag tag) | |
18689 | { | |
18690 | switch (tag) | |
18691 | { | |
18692 | case DW_TAG_constant: | |
18693 | case DW_TAG_enumerator: | |
18694 | case DW_TAG_formal_parameter: | |
18695 | case DW_TAG_template_value_param: | |
18696 | case DW_TAG_variable: | |
18697 | return true; | |
18698 | } | |
18699 | ||
18700 | return false; | |
18701 | } | |
18702 | ||
52356b79 YQ |
18703 | void |
18704 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 18705 | { |
abc72ce4 DE |
18706 | /* Once we've fixed up a die, there's no point in doing so again. |
18707 | This also avoids a memory leak if we were to call | |
18708 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 18709 | if (fixup_called) |
abc72ce4 DE |
18710 | return; |
18711 | ||
72bf9492 DJ |
18712 | /* If we found a reference attribute and the DIE has no name, try |
18713 | to find a name in the referred to DIE. */ | |
18714 | ||
52356b79 | 18715 | if (name == NULL && has_specification) |
72bf9492 DJ |
18716 | { |
18717 | struct partial_die_info *spec_die; | |
72bf9492 | 18718 | |
122cf0f2 | 18719 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
18720 | spec_die = res.pdi; |
18721 | cu = res.cu; | |
72bf9492 | 18722 | |
52356b79 | 18723 | spec_die->fixup (cu); |
72bf9492 DJ |
18724 | |
18725 | if (spec_die->name) | |
18726 | { | |
52356b79 | 18727 | name = spec_die->name; |
72bf9492 DJ |
18728 | |
18729 | /* Copy DW_AT_external attribute if it is set. */ | |
18730 | if (spec_die->is_external) | |
52356b79 | 18731 | is_external = spec_die->is_external; |
72bf9492 DJ |
18732 | } |
18733 | } | |
18734 | ||
25c11aca TV |
18735 | if (!has_const_value && has_specification |
18736 | && can_have_DW_AT_const_value_p (tag)) | |
18737 | { | |
18738 | struct partial_die_info *spec_die; | |
18739 | ||
18740 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); | |
18741 | spec_die = res.pdi; | |
18742 | cu = res.cu; | |
18743 | ||
18744 | spec_die->fixup (cu); | |
18745 | ||
18746 | if (spec_die->has_const_value) | |
18747 | { | |
18748 | /* Copy DW_AT_const_value attribute if it is set. */ | |
18749 | has_const_value = spec_die->has_const_value; | |
18750 | } | |
18751 | } | |
18752 | ||
72bf9492 | 18753 | /* Set default names for some unnamed DIEs. */ |
72bf9492 | 18754 | |
52356b79 YQ |
18755 | if (name == NULL && tag == DW_TAG_namespace) |
18756 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 18757 | |
abc72ce4 DE |
18758 | /* If there is no parent die to provide a namespace, and there are |
18759 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18760 | name. */ |
abc72ce4 | 18761 | if (cu->language == language_cplus |
fd5866f6 | 18762 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
18763 | && die_parent == NULL |
18764 | && has_children | |
18765 | && (tag == DW_TAG_class_type | |
18766 | || tag == DW_TAG_structure_type | |
18767 | || tag == DW_TAG_union_type)) | |
18768 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 18769 | |
53832f31 TT |
18770 | /* GCC might emit a nameless struct or union that has a linkage |
18771 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
18772 | if (name == NULL |
18773 | && (tag == DW_TAG_class_type | |
18774 | || tag == DW_TAG_interface_type | |
18775 | || tag == DW_TAG_structure_type | |
18776 | || tag == DW_TAG_union_type) | |
18777 | && linkage_name != NULL) | |
53832f31 | 18778 | { |
43816ebc TT |
18779 | gdb::unique_xmalloc_ptr<char> demangled |
18780 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
18781 | if (demangled != nullptr) | |
53832f31 | 18782 | { |
96408a79 SA |
18783 | const char *base; |
18784 | ||
18785 | /* Strip any leading namespaces/classes, keep only the base name. | |
18786 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
18787 | base = strrchr (demangled.get (), ':'); |
18788 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
18789 | base++; |
18790 | else | |
43816ebc | 18791 | base = demangled.get (); |
96408a79 | 18792 | |
518817b3 | 18793 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18794 | name = objfile->intern (base); |
53832f31 TT |
18795 | } |
18796 | } | |
18797 | ||
52356b79 | 18798 | fixup_called = 1; |
72bf9492 DJ |
18799 | } |
18800 | ||
41144253 | 18801 | /* Read the .debug_loclists header contents from the given SECTION in the |
18802 | HEADER. */ | |
18803 | static void | |
18804 | read_loclist_header (struct loclist_header *header, | |
18805 | struct dwarf2_section_info *section) | |
18806 | { | |
18807 | unsigned int bytes_read; | |
18808 | bfd *abfd = section->get_bfd_owner (); | |
18809 | const gdb_byte *info_ptr = section->buffer; | |
18810 | header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
18811 | info_ptr += bytes_read; | |
18812 | header->version = read_2_bytes (abfd, info_ptr); | |
18813 | info_ptr += 2; | |
18814 | header->addr_size = read_1_byte (abfd, info_ptr); | |
18815 | info_ptr += 1; | |
18816 | header->segment_collector_size = read_1_byte (abfd, info_ptr); | |
18817 | info_ptr += 1; | |
18818 | header->offset_entry_count = read_4_bytes (abfd, info_ptr); | |
18819 | } | |
18820 | ||
18821 | /* Return the DW_AT_loclists_base value for the CU. */ | |
18822 | static ULONGEST | |
18823 | lookup_loclist_base (struct dwarf2_cu *cu) | |
18824 | { | |
18825 | /* For the .dwo unit, the loclist_base points to the first offset following | |
18826 | the header. The header consists of the following entities- | |
18827 | 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64 | |
18828 | bit format) | |
18829 | 2. version (2 bytes) | |
18830 | 3. address size (1 byte) | |
18831 | 4. segment selector size (1 byte) | |
18832 | 5. offset entry count (4 bytes) | |
18833 | These sizes are derived as per the DWARFv5 standard. */ | |
18834 | if (cu->dwo_unit != nullptr) | |
18835 | { | |
18836 | if (cu->header.initial_length_size == 4) | |
18837 | return LOCLIST_HEADER_SIZE32; | |
18838 | return LOCLIST_HEADER_SIZE64; | |
18839 | } | |
18840 | return cu->loclist_base; | |
18841 | } | |
18842 | ||
18843 | /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the | |
18844 | array of offsets in the .debug_loclists section. */ | |
18845 | static CORE_ADDR | |
18846 | read_loclist_index (struct dwarf2_cu *cu, ULONGEST loclist_index) | |
18847 | { | |
18848 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
18849 | = cu->per_cu->dwarf2_per_objfile; | |
18850 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18851 | bfd *abfd = objfile->obfd; | |
18852 | ULONGEST loclist_base = lookup_loclist_base (cu); | |
18853 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); | |
18854 | ||
18855 | section->read (objfile); | |
18856 | if (section->buffer == NULL) | |
18857 | complaint (_("DW_FORM_loclistx used without .debug_loclists " | |
18858 | "section [in module %s]"), objfile_name (objfile)); | |
18859 | struct loclist_header header; | |
18860 | read_loclist_header (&header, section); | |
18861 | if (loclist_index >= header.offset_entry_count) | |
18862 | complaint (_("DW_FORM_loclistx pointing outside of " | |
18863 | ".debug_loclists offset array [in module %s]"), | |
18864 | objfile_name (objfile)); | |
18865 | if (loclist_base + loclist_index * cu->header.offset_size | |
18866 | >= section->size) | |
18867 | complaint (_("DW_FORM_loclistx pointing outside of " | |
18868 | ".debug_loclists section [in module %s]"), | |
18869 | objfile_name (objfile)); | |
18870 | const gdb_byte *info_ptr | |
18871 | = section->buffer + loclist_base + loclist_index * cu->header.offset_size; | |
18872 | ||
18873 | if (cu->header.offset_size == 4) | |
18874 | return bfd_get_32 (abfd, info_ptr) + loclist_base; | |
18875 | else | |
18876 | return bfd_get_64 (abfd, info_ptr) + loclist_base; | |
18877 | } | |
18878 | ||
18a8505e AT |
18879 | /* Process the attributes that had to be skipped in the first round. These |
18880 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
18881 | They could not have been processed in the first round, because at the time | |
18882 | the values of str_offsets_base or addr_base may not have been known. */ | |
f1749218 TT |
18883 | static void |
18884 | read_attribute_reprocess (const struct die_reader_specs *reader, | |
18885 | struct attribute *attr) | |
18a8505e AT |
18886 | { |
18887 | struct dwarf2_cu *cu = reader->cu; | |
18888 | switch (attr->form) | |
18889 | { | |
18890 | case DW_FORM_addrx: | |
18891 | case DW_FORM_GNU_addr_index: | |
18892 | DW_ADDR (attr) = read_addr_index (cu, DW_UNSND (attr)); | |
18893 | break; | |
41144253 | 18894 | case DW_FORM_loclistx: |
18895 | DW_UNSND (attr) = read_loclist_index (cu, DW_UNSND (attr)); | |
18896 | break; | |
18a8505e AT |
18897 | case DW_FORM_strx: |
18898 | case DW_FORM_strx1: | |
18899 | case DW_FORM_strx2: | |
18900 | case DW_FORM_strx3: | |
18901 | case DW_FORM_strx4: | |
18902 | case DW_FORM_GNU_str_index: | |
18903 | { | |
18904 | unsigned int str_index = DW_UNSND (attr); | |
18905 | if (reader->dwo_file != NULL) | |
18906 | { | |
18907 | DW_STRING (attr) = read_dwo_str_index (reader, str_index); | |
18908 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18909 | } | |
18910 | else | |
18911 | { | |
18912 | DW_STRING (attr) = read_stub_str_index (cu, str_index); | |
18913 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18914 | } | |
18915 | break; | |
18916 | } | |
18917 | default: | |
18918 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
18919 | } | |
18920 | } | |
18921 | ||
a8329558 | 18922 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18923 | |
d521ce57 | 18924 | static const gdb_byte * |
dee91e82 DE |
18925 | read_attribute_value (const struct die_reader_specs *reader, |
18926 | struct attribute *attr, unsigned form, | |
18a8505e AT |
18927 | LONGEST implicit_const, const gdb_byte *info_ptr, |
18928 | bool *need_reprocess) | |
c906108c | 18929 | { |
dee91e82 | 18930 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18931 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18932 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18933 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
dee91e82 | 18934 | bfd *abfd = reader->abfd; |
e7c27a73 | 18935 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18936 | unsigned int bytes_read; |
18937 | struct dwarf_block *blk; | |
18a8505e | 18938 | *need_reprocess = false; |
c906108c | 18939 | |
aead7601 | 18940 | attr->form = (enum dwarf_form) form; |
a8329558 | 18941 | switch (form) |
c906108c | 18942 | { |
c906108c | 18943 | case DW_FORM_ref_addr: |
ae411497 | 18944 | if (cu->header.version == 2) |
c8a7a66f TT |
18945 | DW_UNSND (attr) = cu->header.read_address (abfd, info_ptr, |
18946 | &bytes_read); | |
ae411497 | 18947 | else |
8266302d TT |
18948 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, |
18949 | &bytes_read); | |
ae411497 TT |
18950 | info_ptr += bytes_read; |
18951 | break; | |
36586728 | 18952 | case DW_FORM_GNU_ref_alt: |
8266302d | 18953 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
36586728 TT |
18954 | info_ptr += bytes_read; |
18955 | break; | |
ae411497 | 18956 | case DW_FORM_addr: |
08feed99 TT |
18957 | { |
18958 | struct gdbarch *gdbarch = objfile->arch (); | |
18959 | DW_ADDR (attr) = cu->header.read_address (abfd, info_ptr, &bytes_read); | |
18960 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); | |
18961 | info_ptr += bytes_read; | |
18962 | } | |
c906108c SS |
18963 | break; |
18964 | case DW_FORM_block2: | |
7b5a2f43 | 18965 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18966 | blk->size = read_2_bytes (abfd, info_ptr); |
18967 | info_ptr += 2; | |
18968 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18969 | info_ptr += blk->size; | |
18970 | DW_BLOCK (attr) = blk; | |
18971 | break; | |
18972 | case DW_FORM_block4: | |
7b5a2f43 | 18973 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18974 | blk->size = read_4_bytes (abfd, info_ptr); |
18975 | info_ptr += 4; | |
18976 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18977 | info_ptr += blk->size; | |
18978 | DW_BLOCK (attr) = blk; | |
18979 | break; | |
18980 | case DW_FORM_data2: | |
18981 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18982 | info_ptr += 2; | |
18983 | break; | |
18984 | case DW_FORM_data4: | |
18985 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18986 | info_ptr += 4; | |
18987 | break; | |
18988 | case DW_FORM_data8: | |
18989 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18990 | info_ptr += 8; | |
18991 | break; | |
0224619f JK |
18992 | case DW_FORM_data16: |
18993 | blk = dwarf_alloc_block (cu); | |
18994 | blk->size = 16; | |
18995 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18996 | info_ptr += 16; | |
18997 | DW_BLOCK (attr) = blk; | |
18998 | break; | |
2dc7f7b3 | 18999 | case DW_FORM_sec_offset: |
8266302d | 19000 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
2dc7f7b3 TT |
19001 | info_ptr += bytes_read; |
19002 | break; | |
41144253 | 19003 | case DW_FORM_loclistx: |
19004 | { | |
19005 | *need_reprocess = true; | |
19006 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19007 | info_ptr += bytes_read; | |
19008 | } | |
19009 | break; | |
c906108c | 19010 | case DW_FORM_string: |
9b1c24c8 | 19011 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 19012 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
19013 | info_ptr += bytes_read; |
19014 | break; | |
4bdf3d34 | 19015 | case DW_FORM_strp: |
36586728 TT |
19016 | if (!cu->per_cu->is_dwz) |
19017 | { | |
ed2dc618 SM |
19018 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
19019 | abfd, info_ptr, cu_header, | |
36586728 TT |
19020 | &bytes_read); |
19021 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19022 | info_ptr += bytes_read; | |
19023 | break; | |
19024 | } | |
19025 | /* FALLTHROUGH */ | |
43988095 JK |
19026 | case DW_FORM_line_strp: |
19027 | if (!cu->per_cu->is_dwz) | |
19028 | { | |
86c0bb4c TT |
19029 | DW_STRING (attr) |
19030 | = dwarf2_per_objfile->read_line_string (info_ptr, cu_header, | |
19031 | &bytes_read); | |
43988095 JK |
19032 | DW_STRING_IS_CANONICAL (attr) = 0; |
19033 | info_ptr += bytes_read; | |
19034 | break; | |
19035 | } | |
19036 | /* FALLTHROUGH */ | |
36586728 TT |
19037 | case DW_FORM_GNU_strp_alt: |
19038 | { | |
ed2dc618 | 19039 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
8266302d TT |
19040 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
19041 | &bytes_read); | |
36586728 | 19042 | |
0314b390 | 19043 | DW_STRING (attr) = dwz->read_string (objfile, str_offset); |
36586728 TT |
19044 | DW_STRING_IS_CANONICAL (attr) = 0; |
19045 | info_ptr += bytes_read; | |
19046 | } | |
4bdf3d34 | 19047 | break; |
2dc7f7b3 | 19048 | case DW_FORM_exprloc: |
c906108c | 19049 | case DW_FORM_block: |
7b5a2f43 | 19050 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19051 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19052 | info_ptr += bytes_read; | |
19053 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19054 | info_ptr += blk->size; | |
19055 | DW_BLOCK (attr) = blk; | |
19056 | break; | |
19057 | case DW_FORM_block1: | |
7b5a2f43 | 19058 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19059 | blk->size = read_1_byte (abfd, info_ptr); |
19060 | info_ptr += 1; | |
19061 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19062 | info_ptr += blk->size; | |
19063 | DW_BLOCK (attr) = blk; | |
19064 | break; | |
19065 | case DW_FORM_data1: | |
19066 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19067 | info_ptr += 1; | |
19068 | break; | |
19069 | case DW_FORM_flag: | |
19070 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19071 | info_ptr += 1; | |
19072 | break; | |
2dc7f7b3 TT |
19073 | case DW_FORM_flag_present: |
19074 | DW_UNSND (attr) = 1; | |
19075 | break; | |
c906108c SS |
19076 | case DW_FORM_sdata: |
19077 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19078 | info_ptr += bytes_read; | |
19079 | break; | |
19080 | case DW_FORM_udata: | |
18a8505e | 19081 | case DW_FORM_rnglistx: |
c906108c SS |
19082 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19083 | info_ptr += bytes_read; | |
19084 | break; | |
19085 | case DW_FORM_ref1: | |
9c541725 | 19086 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19087 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
19088 | info_ptr += 1; |
19089 | break; | |
19090 | case DW_FORM_ref2: | |
9c541725 | 19091 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19092 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19093 | info_ptr += 2; |
19094 | break; | |
19095 | case DW_FORM_ref4: | |
9c541725 | 19096 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19097 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19098 | info_ptr += 4; |
19099 | break; | |
613e1657 | 19100 | case DW_FORM_ref8: |
9c541725 | 19101 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19102 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
19103 | info_ptr += 8; |
19104 | break; | |
55f1336d | 19105 | case DW_FORM_ref_sig8: |
ac9ec31b | 19106 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
19107 | info_ptr += 8; |
19108 | break; | |
c906108c | 19109 | case DW_FORM_ref_udata: |
9c541725 | 19110 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19111 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19112 | info_ptr += bytes_read; |
19113 | break; | |
c906108c | 19114 | case DW_FORM_indirect: |
a8329558 KW |
19115 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19116 | info_ptr += bytes_read; | |
43988095 JK |
19117 | if (form == DW_FORM_implicit_const) |
19118 | { | |
19119 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19120 | info_ptr += bytes_read; | |
19121 | } | |
19122 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
18a8505e | 19123 | info_ptr, need_reprocess); |
43988095 JK |
19124 | break; |
19125 | case DW_FORM_implicit_const: | |
19126 | DW_SND (attr) = implicit_const; | |
a8329558 | 19127 | break; |
336d760d | 19128 | case DW_FORM_addrx: |
3019eac3 | 19129 | case DW_FORM_GNU_addr_index: |
18a8505e AT |
19130 | *need_reprocess = true; |
19131 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
3019eac3 DE |
19132 | info_ptr += bytes_read; |
19133 | break; | |
cf532bd1 | 19134 | case DW_FORM_strx: |
15f18d14 AT |
19135 | case DW_FORM_strx1: |
19136 | case DW_FORM_strx2: | |
19137 | case DW_FORM_strx3: | |
19138 | case DW_FORM_strx4: | |
3019eac3 | 19139 | case DW_FORM_GNU_str_index: |
3019eac3 | 19140 | { |
15f18d14 AT |
19141 | ULONGEST str_index; |
19142 | if (form == DW_FORM_strx1) | |
19143 | { | |
19144 | str_index = read_1_byte (abfd, info_ptr); | |
19145 | info_ptr += 1; | |
19146 | } | |
19147 | else if (form == DW_FORM_strx2) | |
19148 | { | |
19149 | str_index = read_2_bytes (abfd, info_ptr); | |
19150 | info_ptr += 2; | |
19151 | } | |
19152 | else if (form == DW_FORM_strx3) | |
19153 | { | |
19154 | str_index = read_3_bytes (abfd, info_ptr); | |
19155 | info_ptr += 3; | |
19156 | } | |
19157 | else if (form == DW_FORM_strx4) | |
19158 | { | |
19159 | str_index = read_4_bytes (abfd, info_ptr); | |
19160 | info_ptr += 4; | |
19161 | } | |
19162 | else | |
19163 | { | |
19164 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19165 | info_ptr += bytes_read; | |
19166 | } | |
18a8505e AT |
19167 | *need_reprocess = true; |
19168 | DW_UNSND (attr) = str_index; | |
19169 | } | |
3019eac3 | 19170 | break; |
c906108c | 19171 | default: |
8a3fe4f8 | 19172 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19173 | dwarf_form_name (form), |
19174 | bfd_get_filename (abfd)); | |
c906108c | 19175 | } |
28e94949 | 19176 | |
36586728 | 19177 | /* Super hack. */ |
cd6c91b4 | 19178 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
19179 | attr->form = DW_FORM_GNU_ref_alt; |
19180 | ||
28e94949 JB |
19181 | /* We have seen instances where the compiler tried to emit a byte |
19182 | size attribute of -1 which ended up being encoded as an unsigned | |
19183 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19184 | an object of this size seems pretty unlikely so we can relatively | |
19185 | safely treat these cases as if the size attribute was invalid and | |
19186 | treat them as zero by default. */ | |
19187 | if (attr->name == DW_AT_byte_size | |
19188 | && form == DW_FORM_data4 | |
19189 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19190 | { |
19191 | complaint | |
b98664d3 | 19192 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 19193 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
19194 | DW_UNSND (attr) = 0; |
19195 | } | |
28e94949 | 19196 | |
c906108c SS |
19197 | return info_ptr; |
19198 | } | |
19199 | ||
a8329558 KW |
19200 | /* Read an attribute described by an abbreviated attribute. */ |
19201 | ||
d521ce57 | 19202 | static const gdb_byte * |
dee91e82 DE |
19203 | read_attribute (const struct die_reader_specs *reader, |
19204 | struct attribute *attr, struct attr_abbrev *abbrev, | |
18a8505e | 19205 | const gdb_byte *info_ptr, bool *need_reprocess) |
a8329558 KW |
19206 | { |
19207 | attr->name = abbrev->name; | |
43988095 | 19208 | return read_attribute_value (reader, attr, abbrev->form, |
18a8505e AT |
19209 | abbrev->implicit_const, info_ptr, |
19210 | need_reprocess); | |
a8329558 KW |
19211 | } |
19212 | ||
43988095 JK |
19213 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
19214 | ||
19215 | static const char * | |
ed2dc618 | 19216 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4f44ae6c | 19217 | LONGEST str_offset) |
43988095 | 19218 | { |
4f44ae6c TT |
19219 | return dwarf2_per_objfile->str.read_string (dwarf2_per_objfile->objfile, |
19220 | str_offset, "DW_FORM_strp"); | |
c906108c SS |
19221 | } |
19222 | ||
43988095 JK |
19223 | /* Return pointer to string at .debug_str offset as read from BUF. |
19224 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19225 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19226 | ||
d521ce57 | 19227 | static const char * |
ed2dc618 SM |
19228 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
19229 | const gdb_byte *buf, | |
cf2c3c16 TT |
19230 | const struct comp_unit_head *cu_header, |
19231 | unsigned int *bytes_read_ptr) | |
19232 | { | |
8266302d | 19233 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 19234 | |
4f44ae6c | 19235 | return read_indirect_string_at_offset (dwarf2_per_objfile, str_offset); |
cf2c3c16 TT |
19236 | } |
19237 | ||
86c0bb4c | 19238 | /* See read.h. */ |
43988095 | 19239 | |
86c0bb4c TT |
19240 | const char * |
19241 | dwarf2_per_objfile::read_line_string (const gdb_byte *buf, | |
43988095 JK |
19242 | const struct comp_unit_head *cu_header, |
19243 | unsigned int *bytes_read_ptr) | |
19244 | { | |
86c0bb4c | 19245 | bfd *abfd = objfile->obfd; |
8266302d | 19246 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 19247 | |
86c0bb4c | 19248 | return line_str.read_string (objfile, str_offset, "DW_FORM_line_strp"); |
43988095 JK |
19249 | } |
19250 | ||
3019eac3 | 19251 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 19252 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
19253 | ADDR_SIZE is the size of addresses from the CU header. */ |
19254 | ||
19255 | static CORE_ADDR | |
ed2dc618 | 19256 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e AT |
19257 | unsigned int addr_index, gdb::optional<ULONGEST> addr_base, |
19258 | int addr_size) | |
3019eac3 DE |
19259 | { |
19260 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19261 | bfd *abfd = objfile->obfd; | |
19262 | const gdb_byte *info_ptr; | |
18a8505e | 19263 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 19264 | |
96b79293 | 19265 | dwarf2_per_objfile->addr.read (objfile); |
3019eac3 DE |
19266 | if (dwarf2_per_objfile->addr.buffer == NULL) |
19267 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 19268 | objfile_name (objfile)); |
18a8505e AT |
19269 | if (addr_base_or_zero + addr_index * addr_size |
19270 | >= dwarf2_per_objfile->addr.size) | |
3019eac3 DE |
19271 | error (_("DW_FORM_addr_index pointing outside of " |
19272 | ".debug_addr section [in module %s]"), | |
4262abfb | 19273 | objfile_name (objfile)); |
3019eac3 | 19274 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18a8505e | 19275 | + addr_base_or_zero + addr_index * addr_size); |
3019eac3 DE |
19276 | if (addr_size == 4) |
19277 | return bfd_get_32 (abfd, info_ptr); | |
19278 | else | |
19279 | return bfd_get_64 (abfd, info_ptr); | |
19280 | } | |
19281 | ||
19282 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
19283 | ||
19284 | static CORE_ADDR | |
19285 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
19286 | { | |
518817b3 SM |
19287 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
19288 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
19289 | } |
19290 | ||
19291 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
19292 | ||
19293 | static CORE_ADDR | |
d521ce57 | 19294 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
19295 | unsigned int *bytes_read) |
19296 | { | |
518817b3 | 19297 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
19298 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
19299 | ||
19300 | return read_addr_index (cu, addr_index); | |
19301 | } | |
19302 | ||
450a1bfc | 19303 | /* See read.h. */ |
3019eac3 DE |
19304 | |
19305 | CORE_ADDR | |
450a1bfc | 19306 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, unsigned int addr_index) |
3019eac3 | 19307 | { |
ed2dc618 | 19308 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 19309 | struct dwarf2_cu *cu = per_cu->cu; |
18a8505e | 19310 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
19311 | int addr_size; |
19312 | ||
3019eac3 DE |
19313 | /* We need addr_base and addr_size. |
19314 | If we don't have PER_CU->cu, we have to get it. | |
19315 | Nasty, but the alternative is storing the needed info in PER_CU, | |
19316 | which at this point doesn't seem justified: it's not clear how frequently | |
19317 | it would get used and it would increase the size of every PER_CU. | |
19318 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
19319 | so we're not in uncharted territory here. | |
19320 | Alas we need to be a bit more complicated as addr_base is contained | |
19321 | in the DIE. | |
19322 | ||
19323 | We don't need to read the entire CU(/TU). | |
19324 | We just need the header and top level die. | |
a1b64ce1 | 19325 | |
3019eac3 | 19326 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 19327 | For now we skip this optimization. */ |
3019eac3 DE |
19328 | |
19329 | if (cu != NULL) | |
19330 | { | |
19331 | addr_base = cu->addr_base; | |
19332 | addr_size = cu->header.addr_size; | |
19333 | } | |
19334 | else | |
19335 | { | |
6751ebae | 19336 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
19337 | addr_base = reader.cu->addr_base; |
19338 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
19339 | } |
19340 | ||
ed2dc618 SM |
19341 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
19342 | addr_size); | |
3019eac3 DE |
19343 | } |
19344 | ||
18a8505e AT |
19345 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
19346 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
19347 | DWO file. */ | |
3019eac3 | 19348 | |
d521ce57 | 19349 | static const char * |
18a8505e AT |
19350 | read_str_index (struct dwarf2_cu *cu, |
19351 | struct dwarf2_section_info *str_section, | |
19352 | struct dwarf2_section_info *str_offsets_section, | |
19353 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 19354 | { |
518817b3 SM |
19355 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19356 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19357 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 19358 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 19359 | bfd *abfd = objfile->obfd; |
d521ce57 | 19360 | const gdb_byte *info_ptr; |
3019eac3 | 19361 | ULONGEST str_offset; |
cf532bd1 | 19362 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 19363 | |
96b79293 TT |
19364 | str_section->read (objfile); |
19365 | str_offsets_section->read (objfile); | |
73869dc2 | 19366 | if (str_section->buffer == NULL) |
18a8505e | 19367 | error (_("%s used without %s section" |
9d8780f0 | 19368 | " in CU at offset %s [in module %s]"), |
96b79293 | 19369 | form_name, str_section->get_name (), |
18a8505e | 19370 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 19371 | if (str_offsets_section->buffer == NULL) |
18a8505e | 19372 | error (_("%s used without %s section" |
9d8780f0 | 19373 | " in CU at offset %s [in module %s]"), |
96b79293 | 19374 | form_name, str_section->get_name (), |
18a8505e | 19375 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 19376 | info_ptr = (str_offsets_section->buffer |
18a8505e | 19377 | + str_offsets_base |
3019eac3 DE |
19378 | + str_index * cu->header.offset_size); |
19379 | if (cu->header.offset_size == 4) | |
19380 | str_offset = bfd_get_32 (abfd, info_ptr); | |
19381 | else | |
19382 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 19383 | if (str_offset >= str_section->size) |
57d63ce2 | 19384 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
19385 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
19386 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19387 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
19388 | } |
19389 | ||
18a8505e AT |
19390 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
19391 | ||
19392 | static const char * | |
19393 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
19394 | { | |
19395 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
19396 | ? reader->cu->header.addr_size : 0; | |
19397 | return read_str_index (reader->cu, | |
19398 | &reader->dwo_file->sections.str, | |
19399 | &reader->dwo_file->sections.str_offsets, | |
19400 | str_offsets_base, str_index); | |
19401 | } | |
19402 | ||
19403 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
19404 | ||
19405 | static const char * | |
19406 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
19407 | { | |
19408 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; | |
19409 | const char *objf_name = objfile_name (objfile); | |
19410 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
19411 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
19412 | ||
19413 | if (!cu->str_offsets_base.has_value ()) | |
19414 | error (_("%s used in Fission stub without %s" | |
19415 | " in CU at offset 0x%lx [in module %s]"), | |
19416 | form_name, str_offsets_attr_name, | |
19417 | (long) cu->header.offset_size, objf_name); | |
19418 | ||
19419 | return read_str_index (cu, | |
19420 | &cu->per_cu->dwarf2_per_objfile->str, | |
19421 | &cu->per_cu->dwarf2_per_objfile->str_offsets, | |
19422 | *cu->str_offsets_base, str_index); | |
19423 | } | |
19424 | ||
3019eac3 DE |
19425 | /* Return the length of an LEB128 number in BUF. */ |
19426 | ||
19427 | static int | |
19428 | leb128_size (const gdb_byte *buf) | |
19429 | { | |
19430 | const gdb_byte *begin = buf; | |
19431 | gdb_byte byte; | |
19432 | ||
19433 | while (1) | |
19434 | { | |
19435 | byte = *buf++; | |
19436 | if ((byte & 128) == 0) | |
19437 | return buf - begin; | |
19438 | } | |
19439 | } | |
19440 | ||
c906108c | 19441 | static void |
e142c38c | 19442 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
19443 | { |
19444 | switch (lang) | |
19445 | { | |
19446 | case DW_LANG_C89: | |
76bee0cc | 19447 | case DW_LANG_C99: |
0cfd832f | 19448 | case DW_LANG_C11: |
c906108c | 19449 | case DW_LANG_C: |
d1be3247 | 19450 | case DW_LANG_UPC: |
e142c38c | 19451 | cu->language = language_c; |
c906108c | 19452 | break; |
9c37b5ae | 19453 | case DW_LANG_Java: |
c906108c | 19454 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19455 | case DW_LANG_C_plus_plus_11: |
19456 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19457 | cu->language = language_cplus; |
c906108c | 19458 | break; |
6aecb9c2 JB |
19459 | case DW_LANG_D: |
19460 | cu->language = language_d; | |
19461 | break; | |
c906108c SS |
19462 | case DW_LANG_Fortran77: |
19463 | case DW_LANG_Fortran90: | |
b21b22e0 | 19464 | case DW_LANG_Fortran95: |
f7de9aab MW |
19465 | case DW_LANG_Fortran03: |
19466 | case DW_LANG_Fortran08: | |
e142c38c | 19467 | cu->language = language_fortran; |
c906108c | 19468 | break; |
a766d390 DE |
19469 | case DW_LANG_Go: |
19470 | cu->language = language_go; | |
19471 | break; | |
c906108c | 19472 | case DW_LANG_Mips_Assembler: |
e142c38c | 19473 | cu->language = language_asm; |
c906108c SS |
19474 | break; |
19475 | case DW_LANG_Ada83: | |
8aaf0b47 | 19476 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19477 | cu->language = language_ada; |
19478 | break; | |
72019c9c GM |
19479 | case DW_LANG_Modula2: |
19480 | cu->language = language_m2; | |
19481 | break; | |
fe8e67fd PM |
19482 | case DW_LANG_Pascal83: |
19483 | cu->language = language_pascal; | |
19484 | break; | |
22566fbd DJ |
19485 | case DW_LANG_ObjC: |
19486 | cu->language = language_objc; | |
19487 | break; | |
c44af4eb TT |
19488 | case DW_LANG_Rust: |
19489 | case DW_LANG_Rust_old: | |
19490 | cu->language = language_rust; | |
19491 | break; | |
c906108c SS |
19492 | case DW_LANG_Cobol74: |
19493 | case DW_LANG_Cobol85: | |
c906108c | 19494 | default: |
e142c38c | 19495 | cu->language = language_minimal; |
c906108c SS |
19496 | break; |
19497 | } | |
e142c38c | 19498 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19499 | } |
19500 | ||
19501 | /* Return the named attribute or NULL if not there. */ | |
19502 | ||
19503 | static struct attribute * | |
e142c38c | 19504 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19505 | { |
a48e046c | 19506 | for (;;) |
c906108c | 19507 | { |
a48e046c TT |
19508 | unsigned int i; |
19509 | struct attribute *spec = NULL; | |
19510 | ||
19511 | for (i = 0; i < die->num_attrs; ++i) | |
19512 | { | |
19513 | if (die->attrs[i].name == name) | |
19514 | return &die->attrs[i]; | |
19515 | if (die->attrs[i].name == DW_AT_specification | |
19516 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19517 | spec = &die->attrs[i]; | |
19518 | } | |
19519 | ||
19520 | if (!spec) | |
19521 | break; | |
c906108c | 19522 | |
f2f0e013 | 19523 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19524 | } |
c5aa993b | 19525 | |
c906108c SS |
19526 | return NULL; |
19527 | } | |
19528 | ||
7d45c7c3 KB |
19529 | /* Return the string associated with a string-typed attribute, or NULL if it |
19530 | is either not found or is of an incorrect type. */ | |
19531 | ||
19532 | static const char * | |
19533 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19534 | { | |
19535 | struct attribute *attr; | |
19536 | const char *str = NULL; | |
19537 | ||
19538 | attr = dwarf2_attr (die, name, cu); | |
19539 | ||
19540 | if (attr != NULL) | |
19541 | { | |
e61108c9 TT |
19542 | str = attr->value_as_string (); |
19543 | if (str == nullptr) | |
b98664d3 | 19544 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
19545 | "DIE at %s in module %s"), |
19546 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 19547 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
19548 | } |
19549 | ||
19550 | return str; | |
19551 | } | |
19552 | ||
a084a2a6 | 19553 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 19554 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
19555 | static const char * |
19556 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
19557 | { | |
19558 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
19559 | if (dwo_name == nullptr) | |
19560 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
19561 | return dwo_name; | |
19562 | } | |
19563 | ||
05cf31d1 JB |
19564 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19565 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19566 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19567 | |
19568 | static int | |
19569 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19570 | { | |
19571 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19572 | ||
19573 | return (attr && DW_UNSND (attr)); | |
19574 | } | |
19575 | ||
3ca72b44 | 19576 | static int |
e142c38c | 19577 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19578 | { |
05cf31d1 JB |
19579 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19580 | which value is non-zero. However, we have to be careful with | |
19581 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19582 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19583 | end up accidently finding a declaration attribute that belongs | |
19584 | to a different DIE referenced by the specification attribute, | |
19585 | even though the given DIE does not have a declaration attribute. */ | |
19586 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19587 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19588 | } |
19589 | ||
63d06c5c | 19590 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19591 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19592 | containing the return value on output. If there is no |
19593 | specification, but there is an abstract origin, that is | |
19594 | returned. */ | |
63d06c5c DC |
19595 | |
19596 | static struct die_info * | |
f2f0e013 | 19597 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19598 | { |
f2f0e013 DJ |
19599 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19600 | *spec_cu); | |
63d06c5c | 19601 | |
edb3359d DJ |
19602 | if (spec_attr == NULL) |
19603 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19604 | ||
63d06c5c DC |
19605 | if (spec_attr == NULL) |
19606 | return NULL; | |
19607 | else | |
f2f0e013 | 19608 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19609 | } |
c906108c | 19610 | |
527f3840 JK |
19611 | /* Stub for free_line_header to match void * callback types. */ |
19612 | ||
19613 | static void | |
19614 | free_line_header_voidp (void *arg) | |
19615 | { | |
9a3c8263 | 19616 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19617 | |
fff8551c | 19618 | delete lh; |
527f3840 JK |
19619 | } |
19620 | ||
83769d0b | 19621 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19622 | |
19623 | static struct dwarf2_section_info * | |
19624 | get_debug_line_section (struct dwarf2_cu *cu) | |
19625 | { | |
19626 | struct dwarf2_section_info *section; | |
518817b3 SM |
19627 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19628 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
19629 | |
19630 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19631 | DWO file. */ | |
19632 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19633 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19634 | else if (cu->per_cu->is_dwz) | |
19635 | { | |
ed2dc618 | 19636 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19637 | |
19638 | section = &dwz->line; | |
19639 | } | |
19640 | else | |
19641 | section = &dwarf2_per_objfile->line; | |
19642 | ||
19643 | return section; | |
19644 | } | |
19645 | ||
debd256d | 19646 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 19647 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 19648 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
19649 | Returns NULL if there is a problem reading the header, e.g., if it |
19650 | has a version we don't understand. | |
debd256d JB |
19651 | |
19652 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
19653 | the returned object point into the dwarf line section buffer, |
19654 | and must not be freed. */ | |
ae2de4f8 | 19655 | |
fff8551c | 19656 | static line_header_up |
9c541725 | 19657 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 19658 | { |
3019eac3 | 19659 | struct dwarf2_section_info *section; |
518817b3 SM |
19660 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19661 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19662 | |
36586728 | 19663 | section = get_debug_line_section (cu); |
96b79293 | 19664 | section->read (dwarf2_per_objfile->objfile); |
3019eac3 | 19665 | if (section->buffer == NULL) |
debd256d | 19666 | { |
3019eac3 | 19667 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 19668 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 19669 | else |
b98664d3 | 19670 | complaint (_("missing .debug_line section")); |
debd256d JB |
19671 | return 0; |
19672 | } | |
19673 | ||
0df7ad3a TT |
19674 | return dwarf_decode_line_header (sect_off, cu->per_cu->is_dwz, |
19675 | dwarf2_per_objfile, section, | |
19676 | &cu->header); | |
debd256d | 19677 | } |
c906108c | 19678 | |
c6da4cef | 19679 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 19680 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 19681 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
19682 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
19683 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 19684 | |
d521ce57 | 19685 | static const char * |
7ba99d21 | 19686 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 19687 | const dwarf2_psymtab *pst, |
c89b44cd TT |
19688 | const char *comp_dir, |
19689 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 19690 | { |
d521ce57 TT |
19691 | const char *include_name = fe.name; |
19692 | const char *include_name_to_compare = include_name; | |
72b9f47f | 19693 | const char *pst_filename; |
c6da4cef DE |
19694 | int file_is_pst; |
19695 | ||
8c43009f | 19696 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 19697 | |
c89b44cd | 19698 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
19699 | if (!IS_ABSOLUTE_PATH (include_name) |
19700 | && (dir_name != NULL || comp_dir != NULL)) | |
19701 | { | |
19702 | /* Avoid creating a duplicate psymtab for PST. | |
19703 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19704 | Before we do the comparison, however, we need to account | |
19705 | for DIR_NAME and COMP_DIR. | |
19706 | First prepend dir_name (if non-NULL). If we still don't | |
19707 | have an absolute path prepend comp_dir (if non-NULL). | |
19708 | However, the directory we record in the include-file's | |
19709 | psymtab does not contain COMP_DIR (to match the | |
19710 | corresponding symtab(s)). | |
19711 | ||
19712 | Example: | |
19713 | ||
19714 | bash$ cd /tmp | |
19715 | bash$ gcc -g ./hello.c | |
19716 | include_name = "hello.c" | |
19717 | dir_name = "." | |
19718 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19719 | DW_AT_name = "./hello.c" |
19720 | ||
19721 | */ | |
c6da4cef DE |
19722 | |
19723 | if (dir_name != NULL) | |
19724 | { | |
c89b44cd TT |
19725 | name_holder->reset (concat (dir_name, SLASH_STRING, |
19726 | include_name, (char *) NULL)); | |
19727 | include_name = name_holder->get (); | |
c6da4cef | 19728 | include_name_to_compare = include_name; |
c6da4cef DE |
19729 | } |
19730 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19731 | { | |
c89b44cd TT |
19732 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
19733 | include_name, (char *) NULL)); | |
19734 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
19735 | } |
19736 | } | |
19737 | ||
19738 | pst_filename = pst->filename; | |
c89b44cd | 19739 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
19740 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
19741 | { | |
c89b44cd TT |
19742 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
19743 | pst_filename, (char *) NULL)); | |
19744 | pst_filename = copied_name.get (); | |
c6da4cef DE |
19745 | } |
19746 | ||
1e3fad37 | 19747 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19748 | |
c6da4cef DE |
19749 | if (file_is_pst) |
19750 | return NULL; | |
19751 | return include_name; | |
19752 | } | |
19753 | ||
d9b3de22 DE |
19754 | /* State machine to track the state of the line number program. */ |
19755 | ||
6f77053d | 19756 | class lnp_state_machine |
d9b3de22 | 19757 | { |
6f77053d PA |
19758 | public: |
19759 | /* Initialize a machine state for the start of a line number | |
19760 | program. */ | |
804d2729 TT |
19761 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
19762 | bool record_lines_p); | |
6f77053d | 19763 | |
8c43009f PA |
19764 | file_entry *current_file () |
19765 | { | |
19766 | /* lh->file_names is 0-based, but the file name numbers in the | |
19767 | statement program are 1-based. */ | |
6f77053d PA |
19768 | return m_line_header->file_name_at (m_file); |
19769 | } | |
19770 | ||
19771 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19772 | we're processing the end of a sequence. */ | |
19773 | void record_line (bool end_sequence); | |
19774 | ||
7ab6656f OJ |
19775 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
19776 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
19777 | void check_line_address (struct dwarf2_cu *cu, |
19778 | const gdb_byte *line_ptr, | |
7ab6656f | 19779 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
19780 | |
19781 | void handle_set_discriminator (unsigned int discriminator) | |
19782 | { | |
19783 | m_discriminator = discriminator; | |
19784 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19785 | } | |
19786 | ||
19787 | /* Handle DW_LNE_set_address. */ | |
19788 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19789 | { | |
19790 | m_op_index = 0; | |
19791 | address += baseaddr; | |
19792 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19793 | } | |
19794 | ||
19795 | /* Handle DW_LNS_advance_pc. */ | |
19796 | void handle_advance_pc (CORE_ADDR adjust); | |
19797 | ||
19798 | /* Handle a special opcode. */ | |
19799 | void handle_special_opcode (unsigned char op_code); | |
19800 | ||
19801 | /* Handle DW_LNS_advance_line. */ | |
19802 | void handle_advance_line (int line_delta) | |
19803 | { | |
19804 | advance_line (line_delta); | |
19805 | } | |
19806 | ||
19807 | /* Handle DW_LNS_set_file. */ | |
19808 | void handle_set_file (file_name_index file); | |
19809 | ||
19810 | /* Handle DW_LNS_negate_stmt. */ | |
19811 | void handle_negate_stmt () | |
19812 | { | |
19813 | m_is_stmt = !m_is_stmt; | |
19814 | } | |
19815 | ||
19816 | /* Handle DW_LNS_const_add_pc. */ | |
19817 | void handle_const_add_pc (); | |
19818 | ||
19819 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19820 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19821 | { | |
19822 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19823 | m_op_index = 0; | |
19824 | } | |
19825 | ||
19826 | /* Handle DW_LNS_copy. */ | |
19827 | void handle_copy () | |
19828 | { | |
19829 | record_line (false); | |
19830 | m_discriminator = 0; | |
19831 | } | |
19832 | ||
19833 | /* Handle DW_LNE_end_sequence. */ | |
19834 | void handle_end_sequence () | |
19835 | { | |
804d2729 | 19836 | m_currently_recording_lines = true; |
6f77053d PA |
19837 | } |
19838 | ||
19839 | private: | |
19840 | /* Advance the line by LINE_DELTA. */ | |
19841 | void advance_line (int line_delta) | |
19842 | { | |
19843 | m_line += line_delta; | |
19844 | ||
19845 | if (line_delta != 0) | |
19846 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19847 | } |
19848 | ||
804d2729 TT |
19849 | struct dwarf2_cu *m_cu; |
19850 | ||
6f77053d PA |
19851 | gdbarch *m_gdbarch; |
19852 | ||
19853 | /* True if we're recording lines. | |
19854 | Otherwise we're building partial symtabs and are just interested in | |
19855 | finding include files mentioned by the line number program. */ | |
19856 | bool m_record_lines_p; | |
19857 | ||
8c43009f | 19858 | /* The line number header. */ |
6f77053d | 19859 | line_header *m_line_header; |
8c43009f | 19860 | |
6f77053d PA |
19861 | /* These are part of the standard DWARF line number state machine, |
19862 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19863 | |
6f77053d | 19864 | unsigned char m_op_index = 0; |
7ba99d21 AT |
19865 | /* The line table index of the current file. */ |
19866 | file_name_index m_file = 1; | |
6f77053d PA |
19867 | unsigned int m_line = 1; |
19868 | ||
19869 | /* These are initialized in the constructor. */ | |
19870 | ||
19871 | CORE_ADDR m_address; | |
19872 | bool m_is_stmt; | |
19873 | unsigned int m_discriminator; | |
d9b3de22 DE |
19874 | |
19875 | /* Additional bits of state we need to track. */ | |
19876 | ||
19877 | /* The last file that we called dwarf2_start_subfile for. | |
19878 | This is only used for TLLs. */ | |
6f77053d | 19879 | unsigned int m_last_file = 0; |
d9b3de22 | 19880 | /* The last file a line number was recorded for. */ |
6f77053d | 19881 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 19882 | |
804d2729 TT |
19883 | /* When true, record the lines we decode. */ |
19884 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
19885 | |
19886 | /* The last line number that was recorded, used to coalesce | |
19887 | consecutive entries for the same line. This can happen, for | |
19888 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19889 | unsigned int m_last_line = 0; |
19890 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19891 | }; |
d9b3de22 | 19892 | |
6f77053d PA |
19893 | void |
19894 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19895 | { | |
19896 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19897 | / m_line_header->maximum_ops_per_instruction) | |
19898 | * m_line_header->minimum_instruction_length); | |
19899 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19900 | m_op_index = ((m_op_index + adjust) | |
19901 | % m_line_header->maximum_ops_per_instruction); | |
19902 | } | |
d9b3de22 | 19903 | |
6f77053d PA |
19904 | void |
19905 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19906 | { |
6f77053d | 19907 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
19908 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
19909 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
19910 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
19911 | / m_line_header->maximum_ops_per_instruction) |
19912 | * m_line_header->minimum_instruction_length); | |
19913 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 19914 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 19915 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 19916 | |
258bf0ee | 19917 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
19918 | advance_line (line_delta); |
19919 | record_line (false); | |
19920 | m_discriminator = 0; | |
19921 | } | |
d9b3de22 | 19922 | |
6f77053d PA |
19923 | void |
19924 | lnp_state_machine::handle_set_file (file_name_index file) | |
19925 | { | |
19926 | m_file = file; | |
19927 | ||
19928 | const file_entry *fe = current_file (); | |
19929 | if (fe == NULL) | |
19930 | dwarf2_debug_line_missing_file_complaint (); | |
19931 | else if (m_record_lines_p) | |
19932 | { | |
19933 | const char *dir = fe->include_dir (m_line_header); | |
19934 | ||
c24bdb02 | 19935 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 19936 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 19937 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
19938 | } |
19939 | } | |
19940 | ||
19941 | void | |
19942 | lnp_state_machine::handle_const_add_pc () | |
19943 | { | |
19944 | CORE_ADDR adjust | |
19945 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19946 | ||
19947 | CORE_ADDR addr_adj | |
19948 | = (((m_op_index + adjust) | |
19949 | / m_line_header->maximum_ops_per_instruction) | |
19950 | * m_line_header->minimum_instruction_length); | |
19951 | ||
19952 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19953 | m_op_index = ((m_op_index + adjust) | |
19954 | % m_line_header->maximum_ops_per_instruction); | |
19955 | } | |
d9b3de22 | 19956 | |
a05a36a5 DE |
19957 | /* Return non-zero if we should add LINE to the line number table. |
19958 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19959 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19960 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19961 | had a non-zero discriminator. | |
19962 | ||
19963 | We have to be careful in the presence of discriminators. | |
19964 | E.g., for this line: | |
19965 | ||
19966 | for (i = 0; i < 100000; i++); | |
19967 | ||
19968 | clang can emit four line number entries for that one line, | |
19969 | each with a different discriminator. | |
19970 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19971 | ||
19972 | However, we want gdb to coalesce all four entries into one. | |
19973 | Otherwise the user could stepi into the middle of the line and | |
19974 | gdb would get confused about whether the pc really was in the | |
19975 | middle of the line. | |
19976 | ||
19977 | Things are further complicated by the fact that two consecutive | |
19978 | line number entries for the same line is a heuristic used by gcc | |
19979 | to denote the end of the prologue. So we can't just discard duplicate | |
19980 | entries, we have to be selective about it. The heuristic we use is | |
19981 | that we only collapse consecutive entries for the same line if at least | |
19982 | one of those entries has a non-zero discriminator. PR 17276. | |
19983 | ||
19984 | Note: Addresses in the line number state machine can never go backwards | |
19985 | within one sequence, thus this coalescing is ok. */ | |
19986 | ||
19987 | static int | |
804d2729 TT |
19988 | dwarf_record_line_p (struct dwarf2_cu *cu, |
19989 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
19990 | int line_has_non_zero_discriminator, |
19991 | struct subfile *last_subfile) | |
19992 | { | |
c24bdb02 | 19993 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
19994 | return 1; |
19995 | if (line != last_line) | |
19996 | return 1; | |
19997 | /* Same line for the same file that we've seen already. | |
19998 | As a last check, for pr 17276, only record the line if the line | |
19999 | has never had a non-zero discriminator. */ | |
20000 | if (!line_has_non_zero_discriminator) | |
20001 | return 1; | |
20002 | return 0; | |
20003 | } | |
20004 | ||
804d2729 TT |
20005 | /* Use the CU's builder to record line number LINE beginning at |
20006 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20007 | |
20008 | static void | |
d9b3de22 | 20009 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
8c95582d | 20010 | unsigned int line, CORE_ADDR address, bool is_stmt, |
804d2729 | 20011 | struct dwarf2_cu *cu) |
252a6764 DE |
20012 | { |
20013 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20014 | ||
27e0867f DE |
20015 | if (dwarf_line_debug) |
20016 | { | |
20017 | fprintf_unfiltered (gdb_stdlog, | |
20018 | "Recording line %u, file %s, address %s\n", | |
20019 | line, lbasename (subfile->name), | |
20020 | paddress (gdbarch, address)); | |
20021 | } | |
20022 | ||
804d2729 | 20023 | if (cu != nullptr) |
8c95582d | 20024 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
252a6764 DE |
20025 | } |
20026 | ||
20027 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20028 | Mark the end of a set of line number records. | |
d9b3de22 | 20029 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20030 | If SUBFILE is NULL the request is ignored. */ |
20031 | ||
20032 | static void | |
20033 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 20034 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 20035 | { |
27e0867f DE |
20036 | if (subfile == NULL) |
20037 | return; | |
20038 | ||
20039 | if (dwarf_line_debug) | |
20040 | { | |
20041 | fprintf_unfiltered (gdb_stdlog, | |
20042 | "Finishing current line, file %s, address %s\n", | |
20043 | lbasename (subfile->name), | |
20044 | paddress (gdbarch, address)); | |
20045 | } | |
20046 | ||
8c95582d | 20047 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
d9b3de22 DE |
20048 | } |
20049 | ||
6f77053d PA |
20050 | void |
20051 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20052 | { |
d9b3de22 DE |
20053 | if (dwarf_line_debug) |
20054 | { | |
20055 | fprintf_unfiltered (gdb_stdlog, | |
20056 | "Processing actual line %u: file %u," | |
94a72be7 | 20057 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 20058 | m_line, m_file, |
6f77053d | 20059 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
20060 | m_is_stmt, m_discriminator, |
20061 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
20062 | } |
20063 | ||
6f77053d | 20064 | file_entry *fe = current_file (); |
8c43009f PA |
20065 | |
20066 | if (fe == NULL) | |
d9b3de22 DE |
20067 | dwarf2_debug_line_missing_file_complaint (); |
20068 | /* For now we ignore lines not starting on an instruction boundary. | |
20069 | But not when processing end_sequence for compatibility with the | |
20070 | previous version of the code. */ | |
6f77053d | 20071 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20072 | { |
8c43009f | 20073 | fe->included_p = 1; |
8c95582d | 20074 | if (m_record_lines_p) |
d9b3de22 | 20075 | { |
c24bdb02 | 20076 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 20077 | || end_sequence) |
d9b3de22 | 20078 | { |
804d2729 TT |
20079 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
20080 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
20081 | } |
20082 | ||
20083 | if (!end_sequence) | |
20084 | { | |
8c95582d AB |
20085 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
20086 | ||
804d2729 | 20087 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
20088 | m_line_has_non_zero_discriminator, |
20089 | m_last_subfile)) | |
d9b3de22 | 20090 | { |
c24bdb02 | 20091 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 20092 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 20093 | builder->get_current_subfile (), |
8c95582d | 20094 | m_line, m_address, is_stmt, |
804d2729 | 20095 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 20096 | } |
c24bdb02 | 20097 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20098 | m_last_line = m_line; |
d9b3de22 DE |
20099 | } |
20100 | } | |
20101 | } | |
20102 | } | |
20103 | ||
804d2729 TT |
20104 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
20105 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 20106 | { |
804d2729 | 20107 | m_cu = cu; |
6f77053d PA |
20108 | m_gdbarch = arch; |
20109 | m_record_lines_p = record_lines_p; | |
20110 | m_line_header = lh; | |
d9b3de22 | 20111 | |
804d2729 | 20112 | m_currently_recording_lines = true; |
d9b3de22 | 20113 | |
d9b3de22 DE |
20114 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
20115 | was a line entry for it so that the backend has a chance to adjust it | |
20116 | and also record it in case it needs it. This is currently used by MIPS | |
20117 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
20118 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
20119 | m_is_stmt = lh->default_is_stmt; | |
20120 | m_discriminator = 0; | |
252a6764 DE |
20121 | } |
20122 | ||
6f77053d PA |
20123 | void |
20124 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
20125 | const gdb_byte *line_ptr, | |
7ab6656f | 20126 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 20127 | { |
7ab6656f OJ |
20128 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
20129 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
20130 | values of zero to preserve GDB's previous behaviour which is to handle | |
20131 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 20132 | |
7ab6656f | 20133 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
20134 | { |
20135 | /* This line table is for a function which has been | |
20136 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20137 | ||
518817b3 | 20138 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
20139 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
20140 | ||
b98664d3 | 20141 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 20142 | line_offset, objfile_name (objfile)); |
804d2729 TT |
20143 | m_currently_recording_lines = false; |
20144 | /* Note: m_currently_recording_lines is left as false until we see | |
20145 | DW_LNE_end_sequence. */ | |
924c2928 DE |
20146 | } |
20147 | } | |
20148 | ||
f3f5162e | 20149 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20150 | Process the line number information in LH. |
20151 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20152 | program in order to set included_p for every referenced header. */ | |
debd256d | 20153 | |
c906108c | 20154 | static void |
43f3e411 DE |
20155 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20156 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20157 | { |
d521ce57 TT |
20158 | const gdb_byte *line_ptr, *extended_end; |
20159 | const gdb_byte *line_end; | |
a8c50c1f | 20160 | unsigned int bytes_read, extended_len; |
699ca60a | 20161 | unsigned char op_code, extended_op; |
e142c38c | 20162 | CORE_ADDR baseaddr; |
518817b3 | 20163 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20164 | bfd *abfd = objfile->obfd; |
08feed99 | 20165 | struct gdbarch *gdbarch = objfile->arch (); |
6f77053d PA |
20166 | /* True if we're recording line info (as opposed to building partial |
20167 | symtabs and just interested in finding include files mentioned by | |
20168 | the line number program). */ | |
20169 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 20170 | |
b3b3bada | 20171 | baseaddr = objfile->text_section_offset (); |
c906108c | 20172 | |
debd256d JB |
20173 | line_ptr = lh->statement_program_start; |
20174 | line_end = lh->statement_program_end; | |
c906108c SS |
20175 | |
20176 | /* Read the statement sequences until there's nothing left. */ | |
20177 | while (line_ptr < line_end) | |
20178 | { | |
6f77053d PA |
20179 | /* The DWARF line number program state machine. Reset the state |
20180 | machine at the start of each sequence. */ | |
804d2729 | 20181 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 20182 | bool end_sequence = false; |
d9b3de22 | 20183 | |
8c43009f | 20184 | if (record_lines_p) |
c906108c | 20185 | { |
8c43009f PA |
20186 | /* Start a subfile for the current file of the state |
20187 | machine. */ | |
20188 | const file_entry *fe = state_machine.current_file (); | |
20189 | ||
20190 | if (fe != NULL) | |
804d2729 | 20191 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
20192 | } |
20193 | ||
a738430d | 20194 | /* Decode the table. */ |
d9b3de22 | 20195 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20196 | { |
20197 | op_code = read_1_byte (abfd, line_ptr); | |
20198 | line_ptr += 1; | |
9aa1fe7e | 20199 | |
debd256d | 20200 | if (op_code >= lh->opcode_base) |
6e70227d | 20201 | { |
8e07a239 | 20202 | /* Special opcode. */ |
6f77053d | 20203 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20204 | } |
20205 | else switch (op_code) | |
c906108c SS |
20206 | { |
20207 | case DW_LNS_extended_op: | |
3e43a32a MS |
20208 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20209 | &bytes_read); | |
473b7be6 | 20210 | line_ptr += bytes_read; |
a8c50c1f | 20211 | extended_end = line_ptr + extended_len; |
c906108c SS |
20212 | extended_op = read_1_byte (abfd, line_ptr); |
20213 | line_ptr += 1; | |
20214 | switch (extended_op) | |
20215 | { | |
20216 | case DW_LNE_end_sequence: | |
6f77053d PA |
20217 | state_machine.handle_end_sequence (); |
20218 | end_sequence = true; | |
c906108c SS |
20219 | break; |
20220 | case DW_LNE_set_address: | |
d9b3de22 DE |
20221 | { |
20222 | CORE_ADDR address | |
c8a7a66f | 20223 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 20224 | line_ptr += bytes_read; |
6f77053d PA |
20225 | |
20226 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 20227 | lowpc - baseaddr, address); |
6f77053d | 20228 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 20229 | } |
c906108c SS |
20230 | break; |
20231 | case DW_LNE_define_file: | |
debd256d | 20232 | { |
d521ce57 | 20233 | const char *cur_file; |
ecfb656c PA |
20234 | unsigned int mod_time, length; |
20235 | dir_index dindex; | |
6e70227d | 20236 | |
3e43a32a MS |
20237 | cur_file = read_direct_string (abfd, line_ptr, |
20238 | &bytes_read); | |
debd256d | 20239 | line_ptr += bytes_read; |
ecfb656c | 20240 | dindex = (dir_index) |
debd256d JB |
20241 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20242 | line_ptr += bytes_read; | |
20243 | mod_time = | |
20244 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20245 | line_ptr += bytes_read; | |
20246 | length = | |
20247 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20248 | line_ptr += bytes_read; | |
ecfb656c | 20249 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20250 | } |
c906108c | 20251 | break; |
d0c6ba3d | 20252 | case DW_LNE_set_discriminator: |
6f77053d PA |
20253 | { |
20254 | /* The discriminator is not interesting to the | |
20255 | debugger; just ignore it. We still need to | |
20256 | check its value though: | |
20257 | if there are consecutive entries for the same | |
20258 | (non-prologue) line we want to coalesce them. | |
20259 | PR 17276. */ | |
20260 | unsigned int discr | |
20261 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20262 | line_ptr += bytes_read; | |
20263 | ||
20264 | state_machine.handle_set_discriminator (discr); | |
20265 | } | |
d0c6ba3d | 20266 | break; |
c906108c | 20267 | default: |
b98664d3 | 20268 | complaint (_("mangled .debug_line section")); |
debd256d | 20269 | return; |
c906108c | 20270 | } |
a8c50c1f DJ |
20271 | /* Make sure that we parsed the extended op correctly. If e.g. |
20272 | we expected a different address size than the producer used, | |
20273 | we may have read the wrong number of bytes. */ | |
20274 | if (line_ptr != extended_end) | |
20275 | { | |
b98664d3 | 20276 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
20277 | return; |
20278 | } | |
c906108c SS |
20279 | break; |
20280 | case DW_LNS_copy: | |
6f77053d | 20281 | state_machine.handle_copy (); |
c906108c SS |
20282 | break; |
20283 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20284 | { |
20285 | CORE_ADDR adjust | |
20286 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20287 | line_ptr += bytes_read; |
6f77053d PA |
20288 | |
20289 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20290 | } |
c906108c SS |
20291 | break; |
20292 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20293 | { |
20294 | int line_delta | |
20295 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20296 | line_ptr += bytes_read; |
6f77053d PA |
20297 | |
20298 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20299 | } |
c906108c SS |
20300 | break; |
20301 | case DW_LNS_set_file: | |
d9b3de22 | 20302 | { |
6f77053d | 20303 | file_name_index file |
ecfb656c PA |
20304 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20305 | &bytes_read); | |
d9b3de22 | 20306 | line_ptr += bytes_read; |
8c43009f | 20307 | |
6f77053d | 20308 | state_machine.handle_set_file (file); |
d9b3de22 | 20309 | } |
c906108c SS |
20310 | break; |
20311 | case DW_LNS_set_column: | |
0ad93d4f | 20312 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20313 | line_ptr += bytes_read; |
20314 | break; | |
20315 | case DW_LNS_negate_stmt: | |
6f77053d | 20316 | state_machine.handle_negate_stmt (); |
c906108c SS |
20317 | break; |
20318 | case DW_LNS_set_basic_block: | |
c906108c | 20319 | break; |
c2c6d25f JM |
20320 | /* Add to the address register of the state machine the |
20321 | address increment value corresponding to special opcode | |
a738430d MK |
20322 | 255. I.e., this value is scaled by the minimum |
20323 | instruction length since special opcode 255 would have | |
b021a221 | 20324 | scaled the increment. */ |
c906108c | 20325 | case DW_LNS_const_add_pc: |
6f77053d | 20326 | state_machine.handle_const_add_pc (); |
c906108c SS |
20327 | break; |
20328 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20329 | { |
6f77053d | 20330 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20331 | line_ptr += 2; |
6f77053d PA |
20332 | |
20333 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20334 | } |
c906108c | 20335 | break; |
9aa1fe7e | 20336 | default: |
a738430d MK |
20337 | { |
20338 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20339 | int i; |
a738430d | 20340 | |
debd256d | 20341 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20342 | { |
20343 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20344 | line_ptr += bytes_read; | |
20345 | } | |
20346 | } | |
c906108c SS |
20347 | } |
20348 | } | |
d9b3de22 DE |
20349 | |
20350 | if (!end_sequence) | |
20351 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20352 | ||
20353 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20354 | in which case we still finish recording the last line). */ | |
6f77053d | 20355 | state_machine.record_line (true); |
c906108c | 20356 | } |
f3f5162e DE |
20357 | } |
20358 | ||
20359 | /* Decode the Line Number Program (LNP) for the given line_header | |
20360 | structure and CU. The actual information extracted and the type | |
20361 | of structures created from the LNP depends on the value of PST. | |
20362 | ||
20363 | 1. If PST is NULL, then this procedure uses the data from the program | |
20364 | to create all necessary symbol tables, and their linetables. | |
20365 | ||
20366 | 2. If PST is not NULL, this procedure reads the program to determine | |
20367 | the list of files included by the unit represented by PST, and | |
20368 | builds all the associated partial symbol tables. | |
20369 | ||
20370 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20371 | It is used for relative paths in the line table. | |
20372 | NOTE: When processing partial symtabs (pst != NULL), | |
20373 | comp_dir == pst->dirname. | |
20374 | ||
20375 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20376 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20377 | symtab we don't use it in the name of the psymtabs we create. | |
20378 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20379 | A good testcase for this is mb-inline.exp. |
20380 | ||
527f3840 JK |
20381 | LOWPC is the lowest address in CU (or 0 if not known). |
20382 | ||
20383 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20384 | for its PC<->lines mapping information. Otherwise only the filename | |
20385 | table is read in. */ | |
f3f5162e DE |
20386 | |
20387 | static void | |
20388 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 20389 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 20390 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 20391 | { |
518817b3 | 20392 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20393 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 20394 | |
527f3840 JK |
20395 | if (decode_mapping) |
20396 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20397 | |
20398 | if (decode_for_pst_p) | |
20399 | { | |
aaa75496 JB |
20400 | /* Now that we're done scanning the Line Header Program, we can |
20401 | create the psymtab of each included file. */ | |
7ba99d21 AT |
20402 | for (auto &file_entry : lh->file_names ()) |
20403 | if (file_entry.included_p == 1) | |
aaa75496 | 20404 | { |
c89b44cd | 20405 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 20406 | const char *include_name = |
7ba99d21 AT |
20407 | psymtab_include_file_name (lh, file_entry, pst, |
20408 | comp_dir, &name_holder); | |
c6da4cef | 20409 | if (include_name != NULL) |
aaa75496 JB |
20410 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20411 | } | |
20412 | } | |
cb1df416 DJ |
20413 | else |
20414 | { | |
20415 | /* Make sure a symtab is created for every file, even files | |
20416 | which contain only variables (i.e. no code with associated | |
20417 | line numbers). */ | |
c24bdb02 KS |
20418 | buildsym_compunit *builder = cu->get_builder (); |
20419 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 20420 | |
7ba99d21 | 20421 | for (auto &fe : lh->file_names ()) |
cb1df416 | 20422 | { |
804d2729 | 20423 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 20424 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 20425 | { |
c24bdb02 | 20426 | builder->get_current_subfile ()->symtab |
804d2729 | 20427 | = allocate_symtab (cust, |
c24bdb02 | 20428 | builder->get_current_subfile ()->name); |
43f3e411 | 20429 | } |
c24bdb02 | 20430 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
20431 | } |
20432 | } | |
c906108c SS |
20433 | } |
20434 | ||
20435 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
20436 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 20437 | or NULL if not known. |
c906108c SS |
20438 | This routine tries to keep line numbers from identical absolute and |
20439 | relative file names in a common subfile. | |
20440 | ||
20441 | Using the `list' example from the GDB testsuite, which resides in | |
20442 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
20443 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
20444 | ||
c5aa993b | 20445 | DW_AT_name: /srcdir/list0.c |
4d663531 | 20446 | DW_AT_comp_dir: /compdir |
357e46e7 | 20447 | files.files[0].name: list0.h |
c5aa993b | 20448 | files.files[0].dir: /srcdir |
357e46e7 | 20449 | files.files[1].name: list0.c |
c5aa993b | 20450 | files.files[1].dir: /srcdir |
c906108c SS |
20451 | |
20452 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
20453 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
20454 | start_subfile will ensure that this happens provided that we pass the | |
20455 | concatenation of files.files[1].dir and files.files[1].name as the | |
20456 | subfile's name. */ | |
c906108c SS |
20457 | |
20458 | static void | |
804d2729 TT |
20459 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
20460 | const char *dirname) | |
c906108c | 20461 | { |
43816ebc | 20462 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 20463 | |
4d663531 | 20464 | /* In order not to lose the line information directory, |
4f1520fb FR |
20465 | we concatenate it to the filename when it makes sense. |
20466 | Note that the Dwarf3 standard says (speaking of filenames in line | |
20467 | information): ``The directory index is ignored for file names | |
20468 | that represent full path names''. Thus ignoring dirname in the | |
20469 | `else' branch below isn't an issue. */ | |
c906108c | 20470 | |
d5166ae1 | 20471 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 20472 | { |
43816ebc TT |
20473 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
20474 | filename = copy.get (); | |
d521ce57 | 20475 | } |
c906108c | 20476 | |
c24bdb02 | 20477 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
20478 | } |
20479 | ||
804d2729 TT |
20480 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
20481 | buildsym_compunit constructor. */ | |
f4dc4d17 | 20482 | |
c24bdb02 KS |
20483 | struct compunit_symtab * |
20484 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
20485 | CORE_ADDR low_pc) | |
f4dc4d17 | 20486 | { |
c24bdb02 | 20487 | gdb_assert (m_builder == nullptr); |
43f3e411 | 20488 | |
c24bdb02 KS |
20489 | m_builder.reset (new struct buildsym_compunit |
20490 | (per_cu->dwarf2_per_objfile->objfile, | |
20491 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 20492 | |
c24bdb02 | 20493 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 20494 | |
c24bdb02 KS |
20495 | get_builder ()->record_debugformat ("DWARF 2"); |
20496 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 20497 | |
c24bdb02 | 20498 | processing_has_namespace_info = false; |
43f3e411 | 20499 | |
c24bdb02 | 20500 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
20501 | } |
20502 | ||
4c2df51b DJ |
20503 | static void |
20504 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 20505 | struct dwarf2_cu *cu) |
4c2df51b | 20506 | { |
518817b3 | 20507 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
20508 | struct comp_unit_head *cu_header = &cu->header; |
20509 | ||
4c2df51b DJ |
20510 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
20511 | code here to turn a symbol with DW_AT_external and a | |
20512 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
20513 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
20514 | with some versions of binutils) where shared libraries could have | |
20515 | relocations against symbols in their debug information - the | |
20516 | minimal symbol would have the right address, but the debug info | |
20517 | would not. It's no longer necessary, because we will explicitly | |
20518 | apply relocations when we read in the debug information now. */ | |
20519 | ||
20520 | /* A DW_AT_location attribute with no contents indicates that a | |
20521 | variable has been optimized away. */ | |
4fc6c0d5 | 20522 | if (attr->form_is_block () && DW_BLOCK (attr)->size == 0) |
4c2df51b | 20523 | { |
f1e6e072 | 20524 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
20525 | return; |
20526 | } | |
20527 | ||
20528 | /* Handle one degenerate form of location expression specially, to | |
20529 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
20530 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
20531 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 20532 | |
4fc6c0d5 | 20533 | if (attr->form_is_block () |
3019eac3 DE |
20534 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
20535 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
20536 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
20537 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
20538 | && (DW_BLOCK (attr)->size |
20539 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 20540 | { |
891d2f0b | 20541 | unsigned int dummy; |
4c2df51b | 20542 | |
3019eac3 | 20543 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
c8a7a66f TT |
20544 | SET_SYMBOL_VALUE_ADDRESS |
20545 | (sym, cu->header.read_address (objfile->obfd, | |
20546 | DW_BLOCK (attr)->data + 1, | |
20547 | &dummy)); | |
3019eac3 | 20548 | else |
38583298 TT |
20549 | SET_SYMBOL_VALUE_ADDRESS |
20550 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
20551 | &dummy)); | |
f1e6e072 | 20552 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 20553 | fixup_symbol_section (sym, objfile); |
6a053cb1 TT |
20554 | SET_SYMBOL_VALUE_ADDRESS |
20555 | (sym, | |
20556 | SYMBOL_VALUE_ADDRESS (sym) | |
20557 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); | |
4c2df51b DJ |
20558 | return; |
20559 | } | |
20560 | ||
20561 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
20562 | expression evaluator, and use LOC_COMPUTED only when necessary | |
20563 | (i.e. when the value of a register or memory location is | |
20564 | referenced, or a thread-local block, etc.). Then again, it might | |
20565 | not be worthwhile. I'm assuming that it isn't unless performance | |
20566 | or memory numbers show me otherwise. */ | |
20567 | ||
f1e6e072 | 20568 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 20569 | |
f1e6e072 | 20570 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 20571 | cu->has_loclist = true; |
4c2df51b DJ |
20572 | } |
20573 | ||
c906108c SS |
20574 | /* Given a pointer to a DWARF information entry, figure out if we need |
20575 | to make a symbol table entry for it, and if so, create a new entry | |
20576 | and return a pointer to it. | |
20577 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
20578 | used the passed type. |
20579 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
20580 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
20581 | |
20582 | static struct symbol * | |
5e2db402 TT |
20583 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
20584 | struct symbol *space) | |
c906108c | 20585 | { |
518817b3 SM |
20586 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20587 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 20588 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
08feed99 | 20589 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 20590 | struct symbol *sym = NULL; |
15d034d0 | 20591 | const char *name; |
c906108c SS |
20592 | struct attribute *attr = NULL; |
20593 | struct attribute *attr2 = NULL; | |
e142c38c | 20594 | CORE_ADDR baseaddr; |
e37fd15a SW |
20595 | struct pending **list_to_add = NULL; |
20596 | ||
edb3359d | 20597 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 20598 | |
b3b3bada | 20599 | baseaddr = objfile->text_section_offset (); |
c906108c | 20600 | |
94af9270 | 20601 | name = dwarf2_name (die, cu); |
c906108c SS |
20602 | if (name) |
20603 | { | |
34eaf542 | 20604 | int suppress_add = 0; |
94af9270 | 20605 | |
34eaf542 TT |
20606 | if (space) |
20607 | sym = space; | |
20608 | else | |
e623cf5d | 20609 | sym = allocate_symbol (objfile); |
c906108c | 20610 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
20611 | |
20612 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 20613 | sym->set_language (cu->language, &objfile->objfile_obstack); |
f55ee35c JK |
20614 | /* Fortran does not have mangling standard and the mangling does differ |
20615 | between gfortran, iFort etc. */ | |
bcfe6157 TT |
20616 | const char *physname |
20617 | = (cu->language == language_fortran | |
20618 | ? dwarf2_full_name (name, die, cu) | |
20619 | : dwarf2_physname (name, die, cu)); | |
20620 | const char *linkagename = dw2_linkage_name (die, cu); | |
20621 | ||
20622 | if (linkagename == nullptr || cu->language == language_ada) | |
20623 | sym->set_linkage_name (physname); | |
20624 | else | |
20625 | { | |
20626 | sym->set_demangled_name (physname, &objfile->objfile_obstack); | |
20627 | sym->set_linkage_name (linkagename); | |
20628 | } | |
f55ee35c | 20629 | |
c906108c | 20630 | /* Default assumptions. |
c5aa993b | 20631 | Use the passed type or decode it from the die. */ |
176620f1 | 20632 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 20633 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
20634 | if (type != NULL) |
20635 | SYMBOL_TYPE (sym) = type; | |
20636 | else | |
e7c27a73 | 20637 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
20638 | attr = dwarf2_attr (die, |
20639 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
20640 | cu); | |
435d3d88 | 20641 | if (attr != nullptr) |
c906108c SS |
20642 | { |
20643 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
20644 | } | |
cb1df416 | 20645 | |
edb3359d DJ |
20646 | attr = dwarf2_attr (die, |
20647 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
20648 | cu); | |
435d3d88 | 20649 | if (attr != nullptr) |
cb1df416 | 20650 | { |
ecfb656c | 20651 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 20652 | struct file_entry *fe; |
9a619af0 | 20653 | |
ecfb656c PA |
20654 | if (cu->line_header != NULL) |
20655 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
20656 | else |
20657 | fe = NULL; | |
20658 | ||
20659 | if (fe == NULL) | |
b98664d3 | 20660 | complaint (_("file index out of range")); |
8c43009f PA |
20661 | else |
20662 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
20663 | } |
20664 | ||
c906108c SS |
20665 | switch (die->tag) |
20666 | { | |
20667 | case DW_TAG_label: | |
e142c38c | 20668 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 20669 | if (attr != nullptr) |
3e29f34a MR |
20670 | { |
20671 | CORE_ADDR addr; | |
20672 | ||
cd6c91b4 | 20673 | addr = attr->value_as_address (); |
3e29f34a | 20674 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 20675 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 20676 | } |
0f5238ed TT |
20677 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20678 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20679 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 20680 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20681 | break; |
20682 | case DW_TAG_subprogram: | |
20683 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20684 | finish_block. */ | |
f1e6e072 | 20685 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20686 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 20687 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
20688 | || cu->language == language_ada |
20689 | || cu->language == language_fortran) | |
c906108c | 20690 | { |
2cfa0c8d | 20691 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
20692 | Ada and Fortran subprograms, whether marked external or |
20693 | not, are always stored as a global symbol, because we want | |
20694 | to be able to access them globally. For instance, we want | |
20695 | to be able to break on a nested subprogram without having | |
20696 | to specify the context. */ | |
c24bdb02 | 20697 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
20698 | } |
20699 | else | |
20700 | { | |
e37fd15a | 20701 | list_to_add = cu->list_in_scope; |
c906108c SS |
20702 | } |
20703 | break; | |
edb3359d DJ |
20704 | case DW_TAG_inlined_subroutine: |
20705 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20706 | finish_block. */ | |
f1e6e072 | 20707 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20708 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20709 | list_to_add = cu->list_in_scope; |
edb3359d | 20710 | break; |
34eaf542 TT |
20711 | case DW_TAG_template_value_param: |
20712 | suppress_add = 1; | |
20713 | /* Fall through. */ | |
72929c62 | 20714 | case DW_TAG_constant: |
c906108c | 20715 | case DW_TAG_variable: |
254e6b9e | 20716 | case DW_TAG_member: |
0963b4bd MS |
20717 | /* Compilation with minimal debug info may result in |
20718 | variables with missing type entries. Change the | |
20719 | misleading `void' type to something sensible. */ | |
78134374 | 20720 | if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID) |
46a4882b | 20721 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20722 | |
e142c38c | 20723 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20724 | /* In the case of DW_TAG_member, we should only be called for |
20725 | static const members. */ | |
20726 | if (die->tag == DW_TAG_member) | |
20727 | { | |
3863f96c DE |
20728 | /* dwarf2_add_field uses die_is_declaration, |
20729 | so we do the same. */ | |
254e6b9e DE |
20730 | gdb_assert (die_is_declaration (die, cu)); |
20731 | gdb_assert (attr); | |
20732 | } | |
435d3d88 | 20733 | if (attr != nullptr) |
c906108c | 20734 | { |
e7c27a73 | 20735 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20736 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20737 | if (!suppress_add) |
34eaf542 TT |
20738 | { |
20739 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 20740 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 20741 | else |
e37fd15a | 20742 | list_to_add = cu->list_in_scope; |
34eaf542 | 20743 | } |
c906108c SS |
20744 | break; |
20745 | } | |
e142c38c | 20746 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 20747 | if (attr != nullptr) |
c906108c | 20748 | { |
e7c27a73 | 20749 | var_decode_location (attr, sym, cu); |
e142c38c | 20750 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20751 | |
20752 | /* Fortran explicitly imports any global symbols to the local | |
20753 | scope by DW_TAG_common_block. */ | |
20754 | if (cu->language == language_fortran && die->parent | |
20755 | && die->parent->tag == DW_TAG_common_block) | |
20756 | attr2 = NULL; | |
20757 | ||
caac4577 JG |
20758 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20759 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20760 | && !dwarf2_per_objfile->has_section_at_zero) | |
20761 | { | |
20762 | /* When a static variable is eliminated by the linker, | |
20763 | the corresponding debug information is not stripped | |
20764 | out, but the variable address is set to null; | |
20765 | do not add such variables into symbol table. */ | |
20766 | } | |
20767 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20768 | { |
4b610737 TT |
20769 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20770 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
20771 | && dwarf2_per_objfile->can_copy) | |
20772 | { | |
20773 | /* A global static variable might be subject to | |
20774 | copy relocation. We first check for a local | |
20775 | minsym, though, because maybe the symbol was | |
20776 | marked hidden, in which case this would not | |
20777 | apply. */ | |
20778 | bound_minimal_symbol found | |
20779 | = (lookup_minimal_symbol_linkage | |
987012b8 | 20780 | (sym->linkage_name (), objfile)); |
4b610737 TT |
20781 | if (found.minsym != nullptr) |
20782 | sym->maybe_copied = 1; | |
20783 | } | |
f55ee35c | 20784 | |
1c809c68 TT |
20785 | /* A variable with DW_AT_external is never static, |
20786 | but it may be block-scoped. */ | |
804d2729 | 20787 | list_to_add |
c24bdb02 KS |
20788 | = ((cu->list_in_scope |
20789 | == cu->get_builder ()->get_file_symbols ()) | |
20790 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20791 | : cu->list_in_scope); |
1c809c68 | 20792 | } |
c906108c | 20793 | else |
e37fd15a | 20794 | list_to_add = cu->list_in_scope; |
c906108c SS |
20795 | } |
20796 | else | |
20797 | { | |
20798 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20799 | If it is an external symbol and we have type information |
20800 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20801 | The address of the variable will then be determined from | |
20802 | the minimal symbol table whenever the variable is | |
20803 | referenced. */ | |
e142c38c | 20804 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20805 | |
20806 | /* Fortran explicitly imports any global symbols to the local | |
20807 | scope by DW_TAG_common_block. */ | |
20808 | if (cu->language == language_fortran && die->parent | |
20809 | && die->parent->tag == DW_TAG_common_block) | |
20810 | { | |
20811 | /* SYMBOL_CLASS doesn't matter here because | |
20812 | read_common_block is going to reset it. */ | |
20813 | if (!suppress_add) | |
20814 | list_to_add = cu->list_in_scope; | |
20815 | } | |
20816 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20817 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20818 | { |
0fe7935b DJ |
20819 | /* A variable with DW_AT_external is never static, but it |
20820 | may be block-scoped. */ | |
804d2729 | 20821 | list_to_add |
c24bdb02 KS |
20822 | = ((cu->list_in_scope |
20823 | == cu->get_builder ()->get_file_symbols ()) | |
20824 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20825 | : cu->list_in_scope); |
0fe7935b | 20826 | |
f1e6e072 | 20827 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20828 | } |
442ddf59 JK |
20829 | else if (!die_is_declaration (die, cu)) |
20830 | { | |
20831 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20832 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20833 | if (!suppress_add) |
20834 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20835 | } |
c906108c SS |
20836 | } |
20837 | break; | |
20838 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
20839 | { |
20840 | /* If we are inside a function, mark this as an argument. If | |
20841 | not, we might be looking at an argument to an inlined function | |
20842 | when we do not have enough information to show inlined frames; | |
20843 | pretend it's a local variable in that case so that the user can | |
20844 | still see it. */ | |
804d2729 | 20845 | struct context_stack *curr |
c24bdb02 | 20846 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
20847 | if (curr != nullptr && curr->name != nullptr) |
20848 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
20849 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 20850 | if (attr != nullptr) |
a60f3166 TT |
20851 | { |
20852 | var_decode_location (attr, sym, cu); | |
20853 | } | |
20854 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 20855 | if (attr != nullptr) |
a60f3166 TT |
20856 | { |
20857 | dwarf2_const_value (attr, sym, cu); | |
20858 | } | |
f346a30d | 20859 | |
a60f3166 TT |
20860 | list_to_add = cu->list_in_scope; |
20861 | } | |
c906108c SS |
20862 | break; |
20863 | case DW_TAG_unspecified_parameters: | |
20864 | /* From varargs functions; gdb doesn't seem to have any | |
20865 | interest in this information, so just ignore it for now. | |
20866 | (FIXME?) */ | |
20867 | break; | |
34eaf542 TT |
20868 | case DW_TAG_template_type_param: |
20869 | suppress_add = 1; | |
20870 | /* Fall through. */ | |
c906108c | 20871 | case DW_TAG_class_type: |
680b30c7 | 20872 | case DW_TAG_interface_type: |
c906108c SS |
20873 | case DW_TAG_structure_type: |
20874 | case DW_TAG_union_type: | |
72019c9c | 20875 | case DW_TAG_set_type: |
c906108c | 20876 | case DW_TAG_enumeration_type: |
f1e6e072 | 20877 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20878 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20879 | |
63d06c5c | 20880 | { |
9c37b5ae | 20881 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20882 | really ever be static objects: otherwise, if you try |
20883 | to, say, break of a class's method and you're in a file | |
20884 | which doesn't mention that class, it won't work unless | |
20885 | the check for all static symbols in lookup_symbol_aux | |
20886 | saves you. See the OtherFileClass tests in | |
20887 | gdb.c++/namespace.exp. */ | |
20888 | ||
e37fd15a | 20889 | if (!suppress_add) |
34eaf542 | 20890 | { |
c24bdb02 | 20891 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 20892 | list_to_add |
c24bdb02 | 20893 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 20894 | && cu->language == language_cplus |
c24bdb02 | 20895 | ? builder->get_global_symbols () |
804d2729 | 20896 | : cu->list_in_scope); |
63d06c5c | 20897 | |
64382290 | 20898 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20899 | ... }" also defines a typedef for "foo". */ |
64382290 | 20900 | if (cu->language == language_cplus |
45280282 | 20901 | || cu->language == language_ada |
c44af4eb TT |
20902 | || cu->language == language_d |
20903 | || cu->language == language_rust) | |
64382290 TT |
20904 | { |
20905 | /* The symbol's name is already allocated along | |
20906 | with this objfile, so we don't need to | |
20907 | duplicate it for the type. */ | |
20908 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
987012b8 | 20909 | TYPE_NAME (SYMBOL_TYPE (sym)) = sym->search_name (); |
64382290 | 20910 | } |
63d06c5c DC |
20911 | } |
20912 | } | |
c906108c SS |
20913 | break; |
20914 | case DW_TAG_typedef: | |
f1e6e072 | 20915 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20916 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20917 | list_to_add = cu->list_in_scope; |
63d06c5c | 20918 | break; |
c906108c | 20919 | case DW_TAG_base_type: |
a02abb62 | 20920 | case DW_TAG_subrange_type: |
f1e6e072 | 20921 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20922 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20923 | list_to_add = cu->list_in_scope; |
c906108c SS |
20924 | break; |
20925 | case DW_TAG_enumerator: | |
e142c38c | 20926 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 20927 | if (attr != nullptr) |
c906108c | 20928 | { |
e7c27a73 | 20929 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20930 | } |
63d06c5c DC |
20931 | { |
20932 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20933 | DW_TAG_class_type, etc. block. */ | |
20934 | ||
804d2729 | 20935 | list_to_add |
c24bdb02 | 20936 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 20937 | && cu->language == language_cplus |
c24bdb02 | 20938 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 20939 | : cu->list_in_scope); |
63d06c5c | 20940 | } |
c906108c | 20941 | break; |
74921315 | 20942 | case DW_TAG_imported_declaration: |
5c4e30ca | 20943 | case DW_TAG_namespace: |
f1e6e072 | 20944 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 20945 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 20946 | break; |
530e8392 KB |
20947 | case DW_TAG_module: |
20948 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20949 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 20950 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 20951 | break; |
4357ac6c | 20952 | case DW_TAG_common_block: |
f1e6e072 | 20953 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 20954 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 20955 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 20956 | break; |
c906108c SS |
20957 | default: |
20958 | /* Not a tag we recognize. Hopefully we aren't processing | |
20959 | trash data, but since we must specifically ignore things | |
20960 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20961 | this point. */ |
b98664d3 | 20962 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 20963 | dwarf_tag_name (die->tag)); |
c906108c SS |
20964 | break; |
20965 | } | |
df8a16a1 | 20966 | |
e37fd15a SW |
20967 | if (suppress_add) |
20968 | { | |
20969 | sym->hash_next = objfile->template_symbols; | |
20970 | objfile->template_symbols = sym; | |
20971 | list_to_add = NULL; | |
20972 | } | |
20973 | ||
20974 | if (list_to_add != NULL) | |
d3cb6808 | 20975 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 20976 | |
df8a16a1 DJ |
20977 | /* For the benefit of old versions of GCC, check for anonymous |
20978 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20979 | if (!cu->processing_has_namespace_info |
94af9270 | 20980 | && cu->language == language_cplus) |
c24bdb02 | 20981 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
20982 | } |
20983 | return (sym); | |
20984 | } | |
20985 | ||
98bfdba5 PA |
20986 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20987 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20988 | standard (v4) is not entirely clear about the meaning of using | |
20989 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20990 | wider than the data. The conclusion of a discussion on the DWARF | |
20991 | list was that this is unspecified. We choose to always zero-extend | |
20992 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20993 | |
98bfdba5 | 20994 | static gdb_byte * |
ff39bb5e | 20995 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20996 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20997 | { |
518817b3 | 20998 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
20999 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21000 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
21001 | LONGEST l = DW_UNSND (attr); |
21002 | ||
21003 | if (bits < sizeof (*value) * 8) | |
21004 | { | |
21005 | l &= ((LONGEST) 1 << bits) - 1; | |
21006 | *value = l; | |
21007 | } | |
21008 | else if (bits == sizeof (*value) * 8) | |
21009 | *value = l; | |
21010 | else | |
21011 | { | |
224c3ddb | 21012 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21013 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21014 | return bytes; | |
21015 | } | |
21016 | ||
21017 | return NULL; | |
21018 | } | |
21019 | ||
21020 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21021 | the value does not fit in *VALUE, set *BYTES - either already | |
21022 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21023 | or, set *BATON, if we translated the constant to a location | |
21024 | expression. */ | |
21025 | ||
21026 | static void | |
ff39bb5e | 21027 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21028 | const char *name, struct obstack *obstack, |
21029 | struct dwarf2_cu *cu, | |
d521ce57 | 21030 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21031 | struct dwarf2_locexpr_baton **baton) |
21032 | { | |
518817b3 | 21033 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 21034 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 21035 | struct dwarf_block *blk; |
98bfdba5 PA |
21036 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21037 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21038 | ||
21039 | *value = 0; | |
21040 | *bytes = NULL; | |
21041 | *baton = NULL; | |
c906108c SS |
21042 | |
21043 | switch (attr->form) | |
21044 | { | |
21045 | case DW_FORM_addr: | |
336d760d | 21046 | case DW_FORM_addrx: |
3019eac3 | 21047 | case DW_FORM_GNU_addr_index: |
ac56253d | 21048 | { |
ac56253d TT |
21049 | gdb_byte *data; |
21050 | ||
98bfdba5 PA |
21051 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21052 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21053 | cu_header->addr_size, |
98bfdba5 | 21054 | TYPE_LENGTH (type)); |
ac56253d TT |
21055 | /* Symbols of this form are reasonably rare, so we just |
21056 | piggyback on the existing location code rather than writing | |
21057 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21058 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
21059 | (*baton)->per_cu = cu->per_cu; |
21060 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 21061 | |
98bfdba5 | 21062 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 21063 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 21064 | (*baton)->data = data; |
ac56253d TT |
21065 | |
21066 | data[0] = DW_OP_addr; | |
21067 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
21068 | byte_order, DW_ADDR (attr)); | |
21069 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 21070 | } |
c906108c | 21071 | break; |
4ac36638 | 21072 | case DW_FORM_string: |
93b5768b | 21073 | case DW_FORM_strp: |
cf532bd1 | 21074 | case DW_FORM_strx: |
3019eac3 | 21075 | case DW_FORM_GNU_str_index: |
36586728 | 21076 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
21077 | /* DW_STRING is already allocated on the objfile obstack, point |
21078 | directly to it. */ | |
d521ce57 | 21079 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 21080 | break; |
c906108c SS |
21081 | case DW_FORM_block1: |
21082 | case DW_FORM_block2: | |
21083 | case DW_FORM_block4: | |
21084 | case DW_FORM_block: | |
2dc7f7b3 | 21085 | case DW_FORM_exprloc: |
0224619f | 21086 | case DW_FORM_data16: |
c906108c | 21087 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
21088 | if (TYPE_LENGTH (type) != blk->size) |
21089 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
21090 | TYPE_LENGTH (type)); | |
21091 | *bytes = blk->data; | |
c906108c | 21092 | break; |
2df3850c JM |
21093 | |
21094 | /* The DW_AT_const_value attributes are supposed to carry the | |
21095 | symbol's value "represented as it would be on the target | |
21096 | architecture." By the time we get here, it's already been | |
21097 | converted to host endianness, so we just need to sign- or | |
21098 | zero-extend it as appropriate. */ | |
21099 | case DW_FORM_data1: | |
3aef2284 | 21100 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21101 | break; |
c906108c | 21102 | case DW_FORM_data2: |
3aef2284 | 21103 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21104 | break; |
c906108c | 21105 | case DW_FORM_data4: |
3aef2284 | 21106 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21107 | break; |
c906108c | 21108 | case DW_FORM_data8: |
3aef2284 | 21109 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
21110 | break; |
21111 | ||
c906108c | 21112 | case DW_FORM_sdata: |
663c44ac | 21113 | case DW_FORM_implicit_const: |
98bfdba5 | 21114 | *value = DW_SND (attr); |
2df3850c JM |
21115 | break; |
21116 | ||
c906108c | 21117 | case DW_FORM_udata: |
98bfdba5 | 21118 | *value = DW_UNSND (attr); |
c906108c | 21119 | break; |
2df3850c | 21120 | |
c906108c | 21121 | default: |
b98664d3 | 21122 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 21123 | dwarf_form_name (attr->form)); |
98bfdba5 | 21124 | *value = 0; |
c906108c SS |
21125 | break; |
21126 | } | |
21127 | } | |
21128 | ||
2df3850c | 21129 | |
98bfdba5 PA |
21130 | /* Copy constant value from an attribute to a symbol. */ |
21131 | ||
2df3850c | 21132 | static void |
ff39bb5e | 21133 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 21134 | struct dwarf2_cu *cu) |
2df3850c | 21135 | { |
518817b3 | 21136 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 21137 | LONGEST value; |
d521ce57 | 21138 | const gdb_byte *bytes; |
98bfdba5 | 21139 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 21140 | |
98bfdba5 | 21141 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 21142 | sym->print_name (), |
98bfdba5 PA |
21143 | &objfile->objfile_obstack, cu, |
21144 | &value, &bytes, &baton); | |
2df3850c | 21145 | |
98bfdba5 PA |
21146 | if (baton != NULL) |
21147 | { | |
98bfdba5 | 21148 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21149 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21150 | } |
21151 | else if (bytes != NULL) | |
21152 | { | |
21153 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21154 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21155 | } |
21156 | else | |
21157 | { | |
21158 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21159 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21160 | } |
2df3850c JM |
21161 | } |
21162 | ||
c906108c SS |
21163 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21164 | ||
21165 | static struct type * | |
e7c27a73 | 21166 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21167 | { |
c906108c | 21168 | struct attribute *type_attr; |
c906108c | 21169 | |
e142c38c | 21170 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21171 | if (!type_attr) |
21172 | { | |
518817b3 | 21173 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21174 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 21175 | return objfile_type (objfile)->builtin_void; |
c906108c | 21176 | } |
348e048f | 21177 | |
673bfd45 | 21178 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21179 | } |
21180 | ||
b4ba55a1 JB |
21181 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21182 | that allows to find parallel types through that information instead | |
21183 | of having to do expensive parallel lookups by type name. */ | |
21184 | ||
21185 | static int | |
21186 | need_gnat_info (struct dwarf2_cu *cu) | |
21187 | { | |
de4cb04a JB |
21188 | /* Assume that the Ada compiler was GNAT, which always produces |
21189 | the auxiliary information. */ | |
21190 | return (cu->language == language_ada); | |
b4ba55a1 JB |
21191 | } |
21192 | ||
b4ba55a1 JB |
21193 | /* Return the auxiliary type of the die in question using its |
21194 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21195 | attribute is not present. */ | |
21196 | ||
21197 | static struct type * | |
21198 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21199 | { | |
b4ba55a1 | 21200 | struct attribute *type_attr; |
b4ba55a1 JB |
21201 | |
21202 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21203 | if (!type_attr) | |
21204 | return NULL; | |
21205 | ||
673bfd45 | 21206 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21207 | } |
21208 | ||
21209 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21210 | descriptive type accordingly. */ | |
21211 | ||
21212 | static void | |
21213 | set_descriptive_type (struct type *type, struct die_info *die, | |
21214 | struct dwarf2_cu *cu) | |
21215 | { | |
21216 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21217 | ||
21218 | if (descriptive_type) | |
21219 | { | |
21220 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21221 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21222 | } | |
21223 | } | |
21224 | ||
c906108c SS |
21225 | /* Return the containing type of the die in question using its |
21226 | DW_AT_containing_type attribute. */ | |
21227 | ||
21228 | static struct type * | |
e7c27a73 | 21229 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21230 | { |
c906108c | 21231 | struct attribute *type_attr; |
518817b3 | 21232 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21233 | |
e142c38c | 21234 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21235 | if (!type_attr) |
21236 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 21237 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 21238 | |
673bfd45 | 21239 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21240 | } |
21241 | ||
ac9ec31b DE |
21242 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21243 | ||
21244 | static struct type * | |
21245 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21246 | { | |
518817b3 SM |
21247 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21248 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 21249 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 21250 | char *saved; |
ac9ec31b | 21251 | |
528e1572 SM |
21252 | std::string message |
21253 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
21254 | objfile_name (objfile), | |
21255 | sect_offset_str (cu->header.sect_off), | |
21256 | sect_offset_str (die->sect_off)); | |
efba19b0 | 21257 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 21258 | |
19f392bc | 21259 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21260 | } |
21261 | ||
673bfd45 | 21262 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21263 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21264 | DW_AT_containing_type. | |
673bfd45 DE |
21265 | If there is no type substitute an error marker. */ |
21266 | ||
c906108c | 21267 | static struct type * |
ff39bb5e | 21268 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21269 | struct dwarf2_cu *cu) |
c906108c | 21270 | { |
518817b3 SM |
21271 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21272 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21273 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
21274 | struct type *this_type; |
21275 | ||
ac9ec31b DE |
21276 | gdb_assert (attr->name == DW_AT_type |
21277 | || attr->name == DW_AT_GNAT_descriptive_type | |
21278 | || attr->name == DW_AT_containing_type); | |
21279 | ||
673bfd45 DE |
21280 | /* First see if we have it cached. */ |
21281 | ||
36586728 TT |
21282 | if (attr->form == DW_FORM_GNU_ref_alt) |
21283 | { | |
21284 | struct dwarf2_per_cu_data *per_cu; | |
0826b30a | 21285 | sect_offset sect_off = attr->get_ref_die_offset (); |
36586728 | 21286 | |
ed2dc618 SM |
21287 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
21288 | dwarf2_per_objfile); | |
9c541725 | 21289 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 21290 | } |
cd6c91b4 | 21291 | else if (attr->form_is_ref ()) |
673bfd45 | 21292 | { |
0826b30a | 21293 | sect_offset sect_off = attr->get_ref_die_offset (); |
673bfd45 | 21294 | |
9c541725 | 21295 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21296 | } |
55f1336d | 21297 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21298 | { |
ac9ec31b | 21299 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21300 | |
ac9ec31b | 21301 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21302 | } |
21303 | else | |
21304 | { | |
b98664d3 | 21305 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
21306 | " at %s [in module %s]"), |
21307 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 21308 | objfile_name (objfile)); |
ac9ec31b | 21309 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21310 | } |
21311 | ||
21312 | /* If not cached we need to read it in. */ | |
21313 | ||
21314 | if (this_type == NULL) | |
21315 | { | |
ac9ec31b | 21316 | struct die_info *type_die = NULL; |
673bfd45 DE |
21317 | struct dwarf2_cu *type_cu = cu; |
21318 | ||
cd6c91b4 | 21319 | if (attr->form_is_ref ()) |
ac9ec31b DE |
21320 | type_die = follow_die_ref (die, attr, &type_cu); |
21321 | if (type_die == NULL) | |
21322 | return build_error_marker_type (cu, die); | |
21323 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21324 | from an inter-CU reference and the type's CU got expanded before |
21325 | ours. */ | |
ac9ec31b | 21326 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21327 | } |
21328 | ||
21329 | /* If we still don't have a type use an error marker. */ | |
21330 | ||
21331 | if (this_type == NULL) | |
ac9ec31b | 21332 | return build_error_marker_type (cu, die); |
673bfd45 | 21333 | |
f792889a | 21334 | return this_type; |
c906108c SS |
21335 | } |
21336 | ||
673bfd45 DE |
21337 | /* Return the type in DIE, CU. |
21338 | Returns NULL for invalid types. | |
21339 | ||
02142a6c | 21340 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21341 | and only reads the die in if necessary. |
21342 | ||
21343 | NOTE: This can be called when reading in partial or full symbols. */ | |
21344 | ||
f792889a | 21345 | static struct type * |
e7c27a73 | 21346 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21347 | { |
f792889a DJ |
21348 | struct type *this_type; |
21349 | ||
21350 | this_type = get_die_type (die, cu); | |
21351 | if (this_type) | |
21352 | return this_type; | |
21353 | ||
673bfd45 DE |
21354 | return read_type_die_1 (die, cu); |
21355 | } | |
21356 | ||
21357 | /* Read the type in DIE, CU. | |
21358 | Returns NULL for invalid types. */ | |
21359 | ||
21360 | static struct type * | |
21361 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21362 | { | |
21363 | struct type *this_type = NULL; | |
21364 | ||
c906108c SS |
21365 | switch (die->tag) |
21366 | { | |
21367 | case DW_TAG_class_type: | |
680b30c7 | 21368 | case DW_TAG_interface_type: |
c906108c SS |
21369 | case DW_TAG_structure_type: |
21370 | case DW_TAG_union_type: | |
f792889a | 21371 | this_type = read_structure_type (die, cu); |
c906108c SS |
21372 | break; |
21373 | case DW_TAG_enumeration_type: | |
f792889a | 21374 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21375 | break; |
21376 | case DW_TAG_subprogram: | |
21377 | case DW_TAG_subroutine_type: | |
edb3359d | 21378 | case DW_TAG_inlined_subroutine: |
f792889a | 21379 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21380 | break; |
21381 | case DW_TAG_array_type: | |
f792889a | 21382 | this_type = read_array_type (die, cu); |
c906108c | 21383 | break; |
72019c9c | 21384 | case DW_TAG_set_type: |
f792889a | 21385 | this_type = read_set_type (die, cu); |
72019c9c | 21386 | break; |
c906108c | 21387 | case DW_TAG_pointer_type: |
f792889a | 21388 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21389 | break; |
21390 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21391 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21392 | break; |
21393 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21394 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21395 | break; | |
21396 | case DW_TAG_rvalue_reference_type: | |
21397 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21398 | break; |
21399 | case DW_TAG_const_type: | |
f792889a | 21400 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21401 | break; |
21402 | case DW_TAG_volatile_type: | |
f792889a | 21403 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21404 | break; |
06d66ee9 TT |
21405 | case DW_TAG_restrict_type: |
21406 | this_type = read_tag_restrict_type (die, cu); | |
21407 | break; | |
c906108c | 21408 | case DW_TAG_string_type: |
f792889a | 21409 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21410 | break; |
21411 | case DW_TAG_typedef: | |
f792889a | 21412 | this_type = read_typedef (die, cu); |
c906108c | 21413 | break; |
a02abb62 | 21414 | case DW_TAG_subrange_type: |
f792889a | 21415 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21416 | break; |
c906108c | 21417 | case DW_TAG_base_type: |
f792889a | 21418 | this_type = read_base_type (die, cu); |
c906108c | 21419 | break; |
81a17f79 | 21420 | case DW_TAG_unspecified_type: |
f792889a | 21421 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21422 | break; |
0114d602 DJ |
21423 | case DW_TAG_namespace: |
21424 | this_type = read_namespace_type (die, cu); | |
21425 | break; | |
f55ee35c JK |
21426 | case DW_TAG_module: |
21427 | this_type = read_module_type (die, cu); | |
21428 | break; | |
a2c2acaf MW |
21429 | case DW_TAG_atomic_type: |
21430 | this_type = read_tag_atomic_type (die, cu); | |
21431 | break; | |
c906108c | 21432 | default: |
b98664d3 | 21433 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 21434 | dwarf_tag_name (die->tag)); |
c906108c SS |
21435 | break; |
21436 | } | |
63d06c5c | 21437 | |
f792889a | 21438 | return this_type; |
63d06c5c DC |
21439 | } |
21440 | ||
abc72ce4 DE |
21441 | /* See if we can figure out if the class lives in a namespace. We do |
21442 | this by looking for a member function; its demangled name will | |
21443 | contain namespace info, if there is any. | |
21444 | Return the computed name or NULL. | |
21445 | Space for the result is allocated on the objfile's obstack. | |
21446 | This is the full-die version of guess_partial_die_structure_name. | |
21447 | In this case we know DIE has no useful parent. */ | |
21448 | ||
43816ebc | 21449 | static const char * |
abc72ce4 DE |
21450 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
21451 | { | |
21452 | struct die_info *spec_die; | |
21453 | struct dwarf2_cu *spec_cu; | |
21454 | struct die_info *child; | |
518817b3 | 21455 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
21456 | |
21457 | spec_cu = cu; | |
21458 | spec_die = die_specification (die, &spec_cu); | |
21459 | if (spec_die != NULL) | |
21460 | { | |
21461 | die = spec_die; | |
21462 | cu = spec_cu; | |
21463 | } | |
21464 | ||
21465 | for (child = die->child; | |
21466 | child != NULL; | |
21467 | child = child->sibling) | |
21468 | { | |
21469 | if (child->tag == DW_TAG_subprogram) | |
21470 | { | |
73b9be8b | 21471 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 21472 | |
7d45c7c3 | 21473 | if (linkage_name != NULL) |
abc72ce4 | 21474 | { |
43816ebc TT |
21475 | gdb::unique_xmalloc_ptr<char> actual_name |
21476 | (language_class_name_from_physname (cu->language_defn, | |
21477 | linkage_name)); | |
21478 | const char *name = NULL; | |
abc72ce4 DE |
21479 | |
21480 | if (actual_name != NULL) | |
21481 | { | |
15d034d0 | 21482 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
21483 | |
21484 | if (die_name != NULL | |
43816ebc | 21485 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
21486 | { |
21487 | /* Strip off the class name from the full name. | |
21488 | We want the prefix. */ | |
21489 | int die_name_len = strlen (die_name); | |
43816ebc TT |
21490 | int actual_name_len = strlen (actual_name.get ()); |
21491 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
21492 | |
21493 | /* Test for '::' as a sanity check. */ | |
21494 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 21495 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 21496 | name = obstack_strndup ( |
e3b94546 | 21497 | &objfile->per_bfd->storage_obstack, |
43816ebc | 21498 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
21499 | } |
21500 | } | |
abc72ce4 DE |
21501 | return name; |
21502 | } | |
21503 | } | |
21504 | } | |
21505 | ||
21506 | return NULL; | |
21507 | } | |
21508 | ||
96408a79 SA |
21509 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
21510 | prefix part in such case. See | |
21511 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21512 | ||
a121b7c1 | 21513 | static const char * |
96408a79 SA |
21514 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
21515 | { | |
21516 | struct attribute *attr; | |
e6a959d6 | 21517 | const char *base; |
96408a79 SA |
21518 | |
21519 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
21520 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
21521 | return NULL; | |
21522 | ||
7d45c7c3 | 21523 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
21524 | return NULL; |
21525 | ||
73b9be8b | 21526 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
21527 | if (attr == NULL || DW_STRING (attr) == NULL) |
21528 | return NULL; | |
21529 | ||
21530 | /* dwarf2_name had to be already called. */ | |
21531 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
21532 | ||
21533 | /* Strip the base name, keep any leading namespaces/classes. */ | |
21534 | base = strrchr (DW_STRING (attr), ':'); | |
21535 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
21536 | return ""; | |
21537 | ||
518817b3 | 21538 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
21539 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
21540 | DW_STRING (attr), | |
21541 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
21542 | } |
21543 | ||
fdde2d81 | 21544 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 21545 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 21546 | |
0114d602 DJ |
21547 | For example, if we're within the method foo() in the following |
21548 | code: | |
21549 | ||
21550 | namespace N { | |
21551 | class C { | |
21552 | void foo () { | |
21553 | } | |
21554 | }; | |
21555 | } | |
21556 | ||
21557 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 21558 | |
0d5cff50 | 21559 | static const char * |
e142c38c | 21560 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 21561 | { |
518817b3 SM |
21562 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21563 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
21564 | struct die_info *parent, *spec_die; |
21565 | struct dwarf2_cu *spec_cu; | |
21566 | struct type *parent_type; | |
a121b7c1 | 21567 | const char *retval; |
63d06c5c | 21568 | |
9c37b5ae | 21569 | if (cu->language != language_cplus |
c44af4eb TT |
21570 | && cu->language != language_fortran && cu->language != language_d |
21571 | && cu->language != language_rust) | |
0114d602 DJ |
21572 | return ""; |
21573 | ||
96408a79 SA |
21574 | retval = anonymous_struct_prefix (die, cu); |
21575 | if (retval) | |
21576 | return retval; | |
21577 | ||
0114d602 DJ |
21578 | /* We have to be careful in the presence of DW_AT_specification. |
21579 | For example, with GCC 3.4, given the code | |
21580 | ||
21581 | namespace N { | |
21582 | void foo() { | |
21583 | // Definition of N::foo. | |
21584 | } | |
21585 | } | |
21586 | ||
21587 | then we'll have a tree of DIEs like this: | |
21588 | ||
21589 | 1: DW_TAG_compile_unit | |
21590 | 2: DW_TAG_namespace // N | |
21591 | 3: DW_TAG_subprogram // declaration of N::foo | |
21592 | 4: DW_TAG_subprogram // definition of N::foo | |
21593 | DW_AT_specification // refers to die #3 | |
21594 | ||
21595 | Thus, when processing die #4, we have to pretend that we're in | |
21596 | the context of its DW_AT_specification, namely the contex of die | |
21597 | #3. */ | |
21598 | spec_cu = cu; | |
21599 | spec_die = die_specification (die, &spec_cu); | |
21600 | if (spec_die == NULL) | |
21601 | parent = die->parent; | |
21602 | else | |
63d06c5c | 21603 | { |
0114d602 DJ |
21604 | parent = spec_die->parent; |
21605 | cu = spec_cu; | |
63d06c5c | 21606 | } |
0114d602 DJ |
21607 | |
21608 | if (parent == NULL) | |
21609 | return ""; | |
98bfdba5 PA |
21610 | else if (parent->building_fullname) |
21611 | { | |
21612 | const char *name; | |
21613 | const char *parent_name; | |
21614 | ||
21615 | /* It has been seen on RealView 2.2 built binaries, | |
21616 | DW_TAG_template_type_param types actually _defined_ as | |
21617 | children of the parent class: | |
21618 | ||
21619 | enum E {}; | |
21620 | template class <class Enum> Class{}; | |
21621 | Class<enum E> class_e; | |
21622 | ||
21623 | 1: DW_TAG_class_type (Class) | |
21624 | 2: DW_TAG_enumeration_type (E) | |
21625 | 3: DW_TAG_enumerator (enum1:0) | |
21626 | 3: DW_TAG_enumerator (enum2:1) | |
21627 | ... | |
21628 | 2: DW_TAG_template_type_param | |
21629 | DW_AT_type DW_FORM_ref_udata (E) | |
21630 | ||
21631 | Besides being broken debug info, it can put GDB into an | |
21632 | infinite loop. Consider: | |
21633 | ||
21634 | When we're building the full name for Class<E>, we'll start | |
21635 | at Class, and go look over its template type parameters, | |
21636 | finding E. We'll then try to build the full name of E, and | |
21637 | reach here. We're now trying to build the full name of E, | |
21638 | and look over the parent DIE for containing scope. In the | |
21639 | broken case, if we followed the parent DIE of E, we'd again | |
21640 | find Class, and once again go look at its template type | |
21641 | arguments, etc., etc. Simply don't consider such parent die | |
21642 | as source-level parent of this die (it can't be, the language | |
21643 | doesn't allow it), and break the loop here. */ | |
21644 | name = dwarf2_name (die, cu); | |
21645 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 21646 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
21647 | name ? name : "<unknown>", |
21648 | parent_name ? parent_name : "<unknown>"); | |
21649 | return ""; | |
21650 | } | |
63d06c5c | 21651 | else |
0114d602 DJ |
21652 | switch (parent->tag) |
21653 | { | |
63d06c5c | 21654 | case DW_TAG_namespace: |
0114d602 | 21655 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
21656 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
21657 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
21658 | Work around this problem here. */ | |
21659 | if (cu->language == language_cplus | |
e86ca25f | 21660 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 21661 | return ""; |
0114d602 | 21662 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 21663 | return TYPE_NAME (parent_type); |
63d06c5c | 21664 | case DW_TAG_class_type: |
680b30c7 | 21665 | case DW_TAG_interface_type: |
63d06c5c | 21666 | case DW_TAG_structure_type: |
0114d602 | 21667 | case DW_TAG_union_type: |
f55ee35c | 21668 | case DW_TAG_module: |
0114d602 | 21669 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
21670 | if (TYPE_NAME (parent_type) != NULL) |
21671 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
21672 | else |
21673 | /* An anonymous structure is only allowed non-static data | |
21674 | members; no typedefs, no member functions, et cetera. | |
21675 | So it does not need a prefix. */ | |
21676 | return ""; | |
abc72ce4 | 21677 | case DW_TAG_compile_unit: |
95554aad | 21678 | case DW_TAG_partial_unit: |
abc72ce4 DE |
21679 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
21680 | if (cu->language == language_cplus | |
fd5866f6 | 21681 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
21682 | && die->child != NULL |
21683 | && (die->tag == DW_TAG_class_type | |
21684 | || die->tag == DW_TAG_structure_type | |
21685 | || die->tag == DW_TAG_union_type)) | |
21686 | { | |
43816ebc | 21687 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
21688 | if (name != NULL) |
21689 | return name; | |
21690 | } | |
21691 | return ""; | |
0a4b0913 AB |
21692 | case DW_TAG_subprogram: |
21693 | /* Nested subroutines in Fortran get a prefix with the name | |
21694 | of the parent's subroutine. */ | |
21695 | if (cu->language == language_fortran) | |
21696 | { | |
21697 | if ((die->tag == DW_TAG_subprogram) | |
21698 | && (dwarf2_name (parent, cu) != NULL)) | |
21699 | return dwarf2_name (parent, cu); | |
21700 | } | |
21701 | return determine_prefix (parent, cu); | |
3d567982 TT |
21702 | case DW_TAG_enumeration_type: |
21703 | parent_type = read_type_die (parent, cu); | |
21704 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21705 | { | |
e86ca25f TT |
21706 | if (TYPE_NAME (parent_type) != NULL) |
21707 | return TYPE_NAME (parent_type); | |
3d567982 TT |
21708 | return ""; |
21709 | } | |
21710 | /* Fall through. */ | |
63d06c5c | 21711 | default: |
8176b9b8 | 21712 | return determine_prefix (parent, cu); |
63d06c5c | 21713 | } |
63d06c5c DC |
21714 | } |
21715 | ||
3e43a32a MS |
21716 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21717 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21718 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21719 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21720 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21721 | |
f55ee35c | 21722 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21723 | |
21724 | static char * | |
f55ee35c JK |
21725 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21726 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21727 | { |
f55ee35c | 21728 | const char *lead = ""; |
5c315b68 | 21729 | const char *sep; |
63d06c5c | 21730 | |
3e43a32a MS |
21731 | if (suffix == NULL || suffix[0] == '\0' |
21732 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21733 | sep = ""; |
45280282 IB |
21734 | else if (cu->language == language_d) |
21735 | { | |
21736 | /* For D, the 'main' function could be defined in any module, but it | |
21737 | should never be prefixed. */ | |
21738 | if (strcmp (suffix, "D main") == 0) | |
21739 | { | |
21740 | prefix = ""; | |
21741 | sep = ""; | |
21742 | } | |
21743 | else | |
21744 | sep = "."; | |
21745 | } | |
f55ee35c JK |
21746 | else if (cu->language == language_fortran && physname) |
21747 | { | |
21748 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21749 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21750 | ||
21751 | lead = "__"; | |
21752 | sep = "_MOD_"; | |
21753 | } | |
987504bb JJ |
21754 | else |
21755 | sep = "::"; | |
63d06c5c | 21756 | |
6dd47d34 DE |
21757 | if (prefix == NULL) |
21758 | prefix = ""; | |
21759 | if (suffix == NULL) | |
21760 | suffix = ""; | |
21761 | ||
987504bb JJ |
21762 | if (obs == NULL) |
21763 | { | |
3e43a32a | 21764 | char *retval |
224c3ddb SM |
21765 | = ((char *) |
21766 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21767 | |
f55ee35c JK |
21768 | strcpy (retval, lead); |
21769 | strcat (retval, prefix); | |
6dd47d34 DE |
21770 | strcat (retval, sep); |
21771 | strcat (retval, suffix); | |
63d06c5c DC |
21772 | return retval; |
21773 | } | |
987504bb JJ |
21774 | else |
21775 | { | |
21776 | /* We have an obstack. */ | |
f55ee35c | 21777 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21778 | } |
63d06c5c DC |
21779 | } |
21780 | ||
71c25dea TT |
21781 | /* Get name of a die, return NULL if not found. */ |
21782 | ||
15d034d0 TT |
21783 | static const char * |
21784 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
be1e3d3e | 21785 | struct objfile *objfile) |
71c25dea TT |
21786 | { |
21787 | if (name && cu->language == language_cplus) | |
21788 | { | |
596dc4ad TT |
21789 | gdb::unique_xmalloc_ptr<char> canon_name |
21790 | = cp_canonicalize_string (name); | |
71c25dea | 21791 | |
596dc4ad TT |
21792 | if (canon_name != nullptr) |
21793 | name = objfile->intern (canon_name.get ()); | |
71c25dea TT |
21794 | } |
21795 | ||
21796 | return name; | |
c906108c SS |
21797 | } |
21798 | ||
96553a0c DE |
21799 | /* Get name of a die, return NULL if not found. |
21800 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21801 | |
15d034d0 | 21802 | static const char * |
e142c38c | 21803 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21804 | { |
21805 | struct attribute *attr; | |
518817b3 | 21806 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 21807 | |
e142c38c | 21808 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21809 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21810 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21811 | && die->tag != DW_TAG_class_type |
21812 | && die->tag != DW_TAG_interface_type | |
21813 | && die->tag != DW_TAG_structure_type | |
21814 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21815 | return NULL; |
21816 | ||
21817 | switch (die->tag) | |
21818 | { | |
21819 | case DW_TAG_compile_unit: | |
95554aad | 21820 | case DW_TAG_partial_unit: |
71c25dea TT |
21821 | /* Compilation units have a DW_AT_name that is a filename, not |
21822 | a source language identifier. */ | |
21823 | case DW_TAG_enumeration_type: | |
21824 | case DW_TAG_enumerator: | |
21825 | /* These tags always have simple identifiers already; no need | |
21826 | to canonicalize them. */ | |
21827 | return DW_STRING (attr); | |
907af001 | 21828 | |
96553a0c DE |
21829 | case DW_TAG_namespace: |
21830 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21831 | return DW_STRING (attr); | |
21832 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21833 | ||
907af001 UW |
21834 | case DW_TAG_class_type: |
21835 | case DW_TAG_interface_type: | |
21836 | case DW_TAG_structure_type: | |
21837 | case DW_TAG_union_type: | |
21838 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21839 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21840 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21841 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21842 | if (attr && DW_STRING (attr) |
61012eef GB |
21843 | && (startswith (DW_STRING (attr), "._") |
21844 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21845 | return NULL; |
53832f31 TT |
21846 | |
21847 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21848 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21849 | if (!attr || DW_STRING (attr) == NULL) | |
21850 | { | |
73b9be8b | 21851 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21852 | if (attr == NULL || DW_STRING (attr) == NULL) |
21853 | return NULL; | |
21854 | ||
df5c6c50 JK |
21855 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21856 | call for the same DIE. */ | |
21857 | if (!DW_STRING_IS_CANONICAL (attr)) | |
53832f31 | 21858 | { |
43816ebc TT |
21859 | gdb::unique_xmalloc_ptr<char> demangled |
21860 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); | |
4f180d53 AT |
21861 | if (demangled == nullptr) |
21862 | return nullptr; | |
43816ebc | 21863 | |
be1e3d3e | 21864 | DW_STRING (attr) = objfile->intern (demangled.get ()); |
53832f31 | 21865 | DW_STRING_IS_CANONICAL (attr) = 1; |
53832f31 | 21866 | } |
67430cd0 TT |
21867 | |
21868 | /* Strip any leading namespaces/classes, keep only the base name. | |
21869 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21870 | const char *base = strrchr (DW_STRING (attr), ':'); | |
21871 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21872 | return &base[1]; | |
21873 | else | |
21874 | return DW_STRING (attr); | |
53832f31 | 21875 | } |
907af001 UW |
21876 | break; |
21877 | ||
71c25dea | 21878 | default: |
907af001 UW |
21879 | break; |
21880 | } | |
21881 | ||
21882 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21883 | { | |
be1e3d3e TT |
21884 | DW_STRING (attr) = dwarf2_canonicalize_name (DW_STRING (attr), cu, |
21885 | objfile); | |
907af001 | 21886 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21887 | } |
907af001 | 21888 | return DW_STRING (attr); |
9219021c DC |
21889 | } |
21890 | ||
21891 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21892 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21893 | containing the return value on output. */ | |
9219021c DC |
21894 | |
21895 | static struct die_info * | |
f2f0e013 | 21896 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21897 | { |
21898 | struct attribute *attr; | |
9219021c | 21899 | |
f2f0e013 | 21900 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21901 | if (attr == NULL) |
21902 | return NULL; | |
21903 | ||
f2f0e013 | 21904 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21905 | } |
21906 | ||
f9aca02d | 21907 | static void |
d97bc12b | 21908 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21909 | { |
21910 | unsigned int i; | |
21911 | ||
d97bc12b | 21912 | print_spaces (indent, f); |
9d8780f0 | 21913 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 21914 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 21915 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
21916 | |
21917 | if (die->parent != NULL) | |
21918 | { | |
21919 | print_spaces (indent, f); | |
9d8780f0 SM |
21920 | fprintf_unfiltered (f, " parent at offset: %s\n", |
21921 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
21922 | } |
21923 | ||
21924 | print_spaces (indent, f); | |
21925 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21926 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21927 | |
d97bc12b DE |
21928 | print_spaces (indent, f); |
21929 | fprintf_unfiltered (f, " attributes:\n"); | |
21930 | ||
c906108c SS |
21931 | for (i = 0; i < die->num_attrs; ++i) |
21932 | { | |
d97bc12b DE |
21933 | print_spaces (indent, f); |
21934 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21935 | dwarf_attr_name (die->attrs[i].name), |
21936 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21937 | |
c906108c SS |
21938 | switch (die->attrs[i].form) |
21939 | { | |
c906108c | 21940 | case DW_FORM_addr: |
336d760d | 21941 | case DW_FORM_addrx: |
3019eac3 | 21942 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21943 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21944 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21945 | break; |
21946 | case DW_FORM_block2: | |
21947 | case DW_FORM_block4: | |
21948 | case DW_FORM_block: | |
21949 | case DW_FORM_block1: | |
56eb65bd SP |
21950 | fprintf_unfiltered (f, "block: size %s", |
21951 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21952 | break; |
2dc7f7b3 | 21953 | case DW_FORM_exprloc: |
56eb65bd SP |
21954 | fprintf_unfiltered (f, "expression: size %s", |
21955 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21956 | break; |
0224619f JK |
21957 | case DW_FORM_data16: |
21958 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21959 | break; | |
4568ecf9 DE |
21960 | case DW_FORM_ref_addr: |
21961 | fprintf_unfiltered (f, "ref address: "); | |
21962 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21963 | break; | |
36586728 TT |
21964 | case DW_FORM_GNU_ref_alt: |
21965 | fprintf_unfiltered (f, "alt ref address: "); | |
21966 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21967 | break; | |
10b3939b DJ |
21968 | case DW_FORM_ref1: |
21969 | case DW_FORM_ref2: | |
21970 | case DW_FORM_ref4: | |
4568ecf9 DE |
21971 | case DW_FORM_ref8: |
21972 | case DW_FORM_ref_udata: | |
d97bc12b | 21973 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21974 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21975 | break; |
c906108c SS |
21976 | case DW_FORM_data1: |
21977 | case DW_FORM_data2: | |
21978 | case DW_FORM_data4: | |
ce5d95e1 | 21979 | case DW_FORM_data8: |
c906108c SS |
21980 | case DW_FORM_udata: |
21981 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21982 | fprintf_unfiltered (f, "constant: %s", |
21983 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21984 | break; |
2dc7f7b3 TT |
21985 | case DW_FORM_sec_offset: |
21986 | fprintf_unfiltered (f, "section offset: %s", | |
21987 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21988 | break; | |
55f1336d | 21989 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21990 | fprintf_unfiltered (f, "signature: %s", |
21991 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21992 | break; |
c906108c | 21993 | case DW_FORM_string: |
4bdf3d34 | 21994 | case DW_FORM_strp: |
43988095 | 21995 | case DW_FORM_line_strp: |
cf532bd1 | 21996 | case DW_FORM_strx: |
3019eac3 | 21997 | case DW_FORM_GNU_str_index: |
36586728 | 21998 | case DW_FORM_GNU_strp_alt: |
8285870a | 21999 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 22000 | DW_STRING (&die->attrs[i]) |
8285870a JK |
22001 | ? DW_STRING (&die->attrs[i]) : "", |
22002 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
22003 | break; |
22004 | case DW_FORM_flag: | |
22005 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 22006 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22007 | else |
d97bc12b | 22008 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22009 | break; |
2dc7f7b3 TT |
22010 | case DW_FORM_flag_present: |
22011 | fprintf_unfiltered (f, "flag: TRUE"); | |
22012 | break; | |
a8329558 | 22013 | case DW_FORM_indirect: |
0963b4bd MS |
22014 | /* The reader will have reduced the indirect form to |
22015 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 22016 | fprintf_unfiltered (f, |
3e43a32a | 22017 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 22018 | break; |
663c44ac JK |
22019 | case DW_FORM_implicit_const: |
22020 | fprintf_unfiltered (f, "constant: %s", | |
22021 | plongest (DW_SND (&die->attrs[i]))); | |
22022 | break; | |
c906108c | 22023 | default: |
d97bc12b | 22024 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22025 | die->attrs[i].form); |
d97bc12b | 22026 | break; |
c906108c | 22027 | } |
d97bc12b | 22028 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22029 | } |
22030 | } | |
22031 | ||
f9aca02d | 22032 | static void |
d97bc12b | 22033 | dump_die_for_error (struct die_info *die) |
c906108c | 22034 | { |
d97bc12b DE |
22035 | dump_die_shallow (gdb_stderr, 0, die); |
22036 | } | |
22037 | ||
22038 | static void | |
22039 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22040 | { | |
22041 | int indent = level * 4; | |
22042 | ||
22043 | gdb_assert (die != NULL); | |
22044 | ||
22045 | if (level >= max_level) | |
22046 | return; | |
22047 | ||
22048 | dump_die_shallow (f, indent, die); | |
22049 | ||
22050 | if (die->child != NULL) | |
c906108c | 22051 | { |
d97bc12b DE |
22052 | print_spaces (indent, f); |
22053 | fprintf_unfiltered (f, " Children:"); | |
22054 | if (level + 1 < max_level) | |
22055 | { | |
22056 | fprintf_unfiltered (f, "\n"); | |
22057 | dump_die_1 (f, level + 1, max_level, die->child); | |
22058 | } | |
22059 | else | |
22060 | { | |
3e43a32a MS |
22061 | fprintf_unfiltered (f, |
22062 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22063 | } |
22064 | } | |
22065 | ||
22066 | if (die->sibling != NULL && level > 0) | |
22067 | { | |
22068 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22069 | } |
22070 | } | |
22071 | ||
d97bc12b DE |
22072 | /* This is called from the pdie macro in gdbinit.in. |
22073 | It's not static so gcc will keep a copy callable from gdb. */ | |
22074 | ||
22075 | void | |
22076 | dump_die (struct die_info *die, int max_level) | |
22077 | { | |
22078 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22079 | } | |
22080 | ||
f9aca02d | 22081 | static void |
51545339 | 22082 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22083 | { |
51545339 | 22084 | void **slot; |
c906108c | 22085 | |
9c541725 PA |
22086 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22087 | to_underlying (die->sect_off), | |
b64f50a1 | 22088 | INSERT); |
51545339 DJ |
22089 | |
22090 | *slot = die; | |
c906108c SS |
22091 | } |
22092 | ||
348e048f DE |
22093 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22094 | On entry *REF_CU is the CU of SRC_DIE. | |
22095 | On exit *REF_CU is the CU of the result. */ | |
22096 | ||
22097 | static struct die_info * | |
ff39bb5e | 22098 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22099 | struct dwarf2_cu **ref_cu) |
22100 | { | |
22101 | struct die_info *die; | |
22102 | ||
cd6c91b4 | 22103 | if (attr->form_is_ref ()) |
348e048f | 22104 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22105 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22106 | die = follow_die_sig (src_die, attr, ref_cu); |
22107 | else | |
22108 | { | |
22109 | dump_die_for_error (src_die); | |
22110 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 22111 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
22112 | } |
22113 | ||
22114 | return die; | |
03dd20cc DJ |
22115 | } |
22116 | ||
5c631832 | 22117 | /* Follow reference OFFSET. |
673bfd45 DE |
22118 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22119 | On exit *REF_CU is the CU of the result. | |
22120 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22121 | |
f9aca02d | 22122 | static struct die_info * |
9c541725 | 22123 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22124 | struct dwarf2_cu **ref_cu) |
c906108c | 22125 | { |
10b3939b | 22126 | struct die_info temp_die; |
f2f0e013 | 22127 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
22128 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22129 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 22130 | |
348e048f DE |
22131 | gdb_assert (cu->per_cu != NULL); |
22132 | ||
98bfdba5 PA |
22133 | target_cu = cu; |
22134 | ||
3019eac3 | 22135 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22136 | { |
22137 | /* .debug_types CUs cannot reference anything outside their CU. | |
22138 | If they need to, they have to reference a signatured type via | |
55f1336d | 22139 | DW_FORM_ref_sig8. */ |
4057dfde | 22140 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 22141 | return NULL; |
348e048f | 22142 | } |
36586728 | 22143 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 22144 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
22145 | { |
22146 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22147 | |
9c541725 | 22148 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 22149 | dwarf2_per_objfile); |
03dd20cc DJ |
22150 | |
22151 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 22152 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 22153 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 22154 | |
10b3939b DJ |
22155 | target_cu = per_cu->cu; |
22156 | } | |
98bfdba5 PA |
22157 | else if (cu->dies == NULL) |
22158 | { | |
22159 | /* We're loading full DIEs during partial symbol reading. */ | |
22160 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 22161 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 22162 | } |
c906108c | 22163 | |
f2f0e013 | 22164 | *ref_cu = target_cu; |
9c541725 | 22165 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
22166 | |
22167 | if (target_cu != cu) | |
22168 | target_cu->ancestor = cu; | |
22169 | ||
9a3c8263 | 22170 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22171 | &temp_die, |
22172 | to_underlying (sect_off)); | |
5c631832 | 22173 | } |
10b3939b | 22174 | |
5c631832 JK |
22175 | /* Follow reference attribute ATTR of SRC_DIE. |
22176 | On entry *REF_CU is the CU of SRC_DIE. | |
22177 | On exit *REF_CU is the CU of the result. */ | |
22178 | ||
22179 | static struct die_info * | |
ff39bb5e | 22180 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22181 | struct dwarf2_cu **ref_cu) |
22182 | { | |
0826b30a | 22183 | sect_offset sect_off = attr->get_ref_die_offset (); |
5c631832 JK |
22184 | struct dwarf2_cu *cu = *ref_cu; |
22185 | struct die_info *die; | |
22186 | ||
9c541725 | 22187 | die = follow_die_offset (sect_off, |
36586728 TT |
22188 | (attr->form == DW_FORM_GNU_ref_alt |
22189 | || cu->per_cu->is_dwz), | |
22190 | ref_cu); | |
5c631832 | 22191 | if (!die) |
9d8780f0 SM |
22192 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
22193 | "at %s [in module %s]"), | |
22194 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 22195 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 22196 | |
5c631832 JK |
22197 | return die; |
22198 | } | |
22199 | ||
d4c9a4f8 | 22200 | /* See read.h. */ |
5c631832 JK |
22201 | |
22202 | struct dwarf2_locexpr_baton | |
9c541725 | 22203 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22204 | dwarf2_per_cu_data *per_cu, |
8b9737bf | 22205 | CORE_ADDR (*get_frame_pc) (void *baton), |
e4a62c65 | 22206 | void *baton, bool resolve_abstract_p) |
5c631832 | 22207 | { |
918dd910 | 22208 | struct dwarf2_cu *cu; |
5c631832 JK |
22209 | struct die_info *die; |
22210 | struct attribute *attr; | |
22211 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
22212 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
22213 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 22214 | |
918dd910 | 22215 | if (per_cu->cu == NULL) |
58f0c718 | 22216 | load_cu (per_cu, false); |
918dd910 | 22217 | cu = per_cu->cu; |
cc12ce38 DE |
22218 | if (cu == NULL) |
22219 | { | |
22220 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22221 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22222 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22223 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22224 | } |
918dd910 | 22225 | |
9c541725 | 22226 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 22227 | if (!die) |
9d8780f0 SM |
22228 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22229 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
22230 | |
22231 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 22232 | if (!attr && resolve_abstract_p |
3360b6e7 | 22233 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
22234 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
22235 | { | |
22236 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
b3b3bada | 22237 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
08feed99 | 22238 | struct gdbarch *gdbarch = objfile->arch (); |
e4a62c65 | 22239 | |
3360b6e7 TV |
22240 | for (const auto &cand_off |
22241 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 22242 | { |
3360b6e7 TV |
22243 | struct dwarf2_cu *cand_cu = cu; |
22244 | struct die_info *cand | |
22245 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
22246 | if (!cand | |
22247 | || !cand->parent | |
e4a62c65 TV |
22248 | || cand->parent->tag != DW_TAG_subprogram) |
22249 | continue; | |
22250 | ||
22251 | CORE_ADDR pc_low, pc_high; | |
22252 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
22253 | if (pc_low == ((CORE_ADDR) -1)) |
22254 | continue; | |
22255 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
22256 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
22257 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
22258 | continue; |
22259 | ||
22260 | die = cand; | |
22261 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22262 | break; | |
22263 | } | |
22264 | } | |
22265 | ||
5c631832 JK |
22266 | if (!attr) |
22267 | { | |
e103e986 JK |
22268 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22269 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22270 | |
e103e986 | 22271 | retval.data = NULL; |
5c631832 JK |
22272 | retval.size = 0; |
22273 | } | |
cd6c91b4 | 22274 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
22275 | { |
22276 | struct dwarf2_loclist_baton loclist_baton; | |
22277 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22278 | size_t size; | |
22279 | ||
22280 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22281 | ||
22282 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22283 | &size, pc); | |
22284 | retval.size = size; | |
22285 | } | |
5c631832 JK |
22286 | else |
22287 | { | |
4fc6c0d5 | 22288 | if (!attr->form_is_block ()) |
9d8780f0 | 22289 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 22290 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 22291 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
22292 | |
22293 | retval.data = DW_BLOCK (attr)->data; | |
22294 | retval.size = DW_BLOCK (attr)->size; | |
22295 | } | |
22296 | retval.per_cu = cu->per_cu; | |
918dd910 | 22297 | |
ed2dc618 | 22298 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 22299 | |
5c631832 | 22300 | return retval; |
348e048f DE |
22301 | } |
22302 | ||
d4c9a4f8 | 22303 | /* See read.h. */ |
8b9737bf TT |
22304 | |
22305 | struct dwarf2_locexpr_baton | |
22306 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 22307 | dwarf2_per_cu_data *per_cu, |
8b9737bf TT |
22308 | CORE_ADDR (*get_frame_pc) (void *baton), |
22309 | void *baton) | |
22310 | { | |
9c541725 | 22311 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22312 | |
9c541725 | 22313 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22314 | } |
22315 | ||
b6807d98 TT |
22316 | /* Write a constant of a given type as target-ordered bytes into |
22317 | OBSTACK. */ | |
22318 | ||
22319 | static const gdb_byte * | |
22320 | write_constant_as_bytes (struct obstack *obstack, | |
22321 | enum bfd_endian byte_order, | |
22322 | struct type *type, | |
22323 | ULONGEST value, | |
22324 | LONGEST *len) | |
22325 | { | |
22326 | gdb_byte *result; | |
22327 | ||
22328 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22329 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22330 | store_unsigned_integer (result, *len, byte_order, value); |
22331 | ||
22332 | return result; | |
22333 | } | |
22334 | ||
d4c9a4f8 | 22335 | /* See read.h. */ |
b6807d98 TT |
22336 | |
22337 | const gdb_byte * | |
9c541725 | 22338 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 SM |
22339 | dwarf2_per_cu_data *per_cu, |
22340 | obstack *obstack, | |
b6807d98 TT |
22341 | LONGEST *len) |
22342 | { | |
22343 | struct dwarf2_cu *cu; | |
22344 | struct die_info *die; | |
22345 | struct attribute *attr; | |
22346 | const gdb_byte *result = NULL; | |
22347 | struct type *type; | |
22348 | LONGEST value; | |
22349 | enum bfd_endian byte_order; | |
e3b94546 | 22350 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 22351 | |
b6807d98 | 22352 | if (per_cu->cu == NULL) |
58f0c718 | 22353 | load_cu (per_cu, false); |
b6807d98 | 22354 | cu = per_cu->cu; |
cc12ce38 DE |
22355 | if (cu == NULL) |
22356 | { | |
22357 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22358 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22359 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22360 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22361 | } |
b6807d98 | 22362 | |
9c541725 | 22363 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 22364 | if (!die) |
9d8780f0 SM |
22365 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22366 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
22367 | |
22368 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
22369 | if (attr == NULL) | |
22370 | return NULL; | |
22371 | ||
e3b94546 | 22372 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
22373 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
22374 | ||
22375 | switch (attr->form) | |
22376 | { | |
22377 | case DW_FORM_addr: | |
336d760d | 22378 | case DW_FORM_addrx: |
b6807d98 TT |
22379 | case DW_FORM_GNU_addr_index: |
22380 | { | |
22381 | gdb_byte *tem; | |
22382 | ||
22383 | *len = cu->header.addr_size; | |
224c3ddb | 22384 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22385 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
22386 | result = tem; | |
22387 | } | |
22388 | break; | |
22389 | case DW_FORM_string: | |
22390 | case DW_FORM_strp: | |
cf532bd1 | 22391 | case DW_FORM_strx: |
b6807d98 TT |
22392 | case DW_FORM_GNU_str_index: |
22393 | case DW_FORM_GNU_strp_alt: | |
22394 | /* DW_STRING is already allocated on the objfile obstack, point | |
22395 | directly to it. */ | |
22396 | result = (const gdb_byte *) DW_STRING (attr); | |
22397 | *len = strlen (DW_STRING (attr)); | |
22398 | break; | |
22399 | case DW_FORM_block1: | |
22400 | case DW_FORM_block2: | |
22401 | case DW_FORM_block4: | |
22402 | case DW_FORM_block: | |
22403 | case DW_FORM_exprloc: | |
0224619f | 22404 | case DW_FORM_data16: |
b6807d98 TT |
22405 | result = DW_BLOCK (attr)->data; |
22406 | *len = DW_BLOCK (attr)->size; | |
22407 | break; | |
22408 | ||
22409 | /* The DW_AT_const_value attributes are supposed to carry the | |
22410 | symbol's value "represented as it would be on the target | |
22411 | architecture." By the time we get here, it's already been | |
22412 | converted to host endianness, so we just need to sign- or | |
22413 | zero-extend it as appropriate. */ | |
22414 | case DW_FORM_data1: | |
22415 | type = die_type (die, cu); | |
22416 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
22417 | if (result == NULL) | |
22418 | result = write_constant_as_bytes (obstack, byte_order, | |
22419 | type, value, len); | |
22420 | break; | |
22421 | case DW_FORM_data2: | |
22422 | type = die_type (die, cu); | |
22423 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
22424 | if (result == NULL) | |
22425 | result = write_constant_as_bytes (obstack, byte_order, | |
22426 | type, value, len); | |
22427 | break; | |
22428 | case DW_FORM_data4: | |
22429 | type = die_type (die, cu); | |
22430 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
22431 | if (result == NULL) | |
22432 | result = write_constant_as_bytes (obstack, byte_order, | |
22433 | type, value, len); | |
22434 | break; | |
22435 | case DW_FORM_data8: | |
22436 | type = die_type (die, cu); | |
22437 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
22438 | if (result == NULL) | |
22439 | result = write_constant_as_bytes (obstack, byte_order, | |
22440 | type, value, len); | |
22441 | break; | |
22442 | ||
22443 | case DW_FORM_sdata: | |
663c44ac | 22444 | case DW_FORM_implicit_const: |
b6807d98 TT |
22445 | type = die_type (die, cu); |
22446 | result = write_constant_as_bytes (obstack, byte_order, | |
22447 | type, DW_SND (attr), len); | |
22448 | break; | |
22449 | ||
22450 | case DW_FORM_udata: | |
22451 | type = die_type (die, cu); | |
22452 | result = write_constant_as_bytes (obstack, byte_order, | |
22453 | type, DW_UNSND (attr), len); | |
22454 | break; | |
22455 | ||
22456 | default: | |
b98664d3 | 22457 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
22458 | dwarf_form_name (attr->form)); |
22459 | break; | |
22460 | } | |
22461 | ||
22462 | return result; | |
22463 | } | |
22464 | ||
d4c9a4f8 | 22465 | /* See read.h. */ |
7942e96e AA |
22466 | |
22467 | struct type * | |
9c541725 | 22468 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22469 | dwarf2_per_cu_data *per_cu) |
7942e96e AA |
22470 | { |
22471 | struct dwarf2_cu *cu; | |
22472 | struct die_info *die; | |
22473 | ||
7942e96e | 22474 | if (per_cu->cu == NULL) |
58f0c718 | 22475 | load_cu (per_cu, false); |
7942e96e AA |
22476 | cu = per_cu->cu; |
22477 | if (!cu) | |
22478 | return NULL; | |
22479 | ||
9c541725 | 22480 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
22481 | if (!die) |
22482 | return NULL; | |
22483 | ||
22484 | return die_type (die, cu); | |
22485 | } | |
22486 | ||
8cb5117c | 22487 | /* See read.h. */ |
8a9b8146 TT |
22488 | |
22489 | struct type * | |
b64f50a1 | 22490 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
22491 | struct dwarf2_per_cu_data *per_cu) |
22492 | { | |
9c541725 | 22493 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 22494 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
22495 | } |
22496 | ||
ac9ec31b | 22497 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 22498 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
22499 | On exit *REF_CU is the CU of the result. |
22500 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
22501 | |
22502 | static struct die_info * | |
ac9ec31b DE |
22503 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
22504 | struct dwarf2_cu **ref_cu) | |
348e048f | 22505 | { |
348e048f | 22506 | struct die_info temp_die; |
c24bdb02 | 22507 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
22508 | struct die_info *die; |
22509 | ||
ac9ec31b DE |
22510 | /* While it might be nice to assert sig_type->type == NULL here, |
22511 | we can get here for DW_AT_imported_declaration where we need | |
22512 | the DIE not the type. */ | |
348e048f DE |
22513 | |
22514 | /* If necessary, add it to the queue and load its DIEs. */ | |
22515 | ||
95554aad | 22516 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 22517 | read_signatured_type (sig_type); |
348e048f | 22518 | |
348e048f | 22519 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 22520 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
22521 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
22522 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 22523 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 22524 | to_underlying (temp_die.sect_off)); |
348e048f DE |
22525 | if (die) |
22526 | { | |
ed2dc618 | 22527 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 22528 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 22529 | |
796a7ff8 DE |
22530 | /* For .gdb_index version 7 keep track of included TUs. |
22531 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
22532 | if (dwarf2_per_objfile->index_table != NULL | |
22533 | && dwarf2_per_objfile->index_table->version <= 7) | |
22534 | { | |
ae640021 | 22535 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
22536 | } |
22537 | ||
348e048f | 22538 | *ref_cu = sig_cu; |
c24bdb02 KS |
22539 | if (sig_cu != cu) |
22540 | sig_cu->ancestor = cu; | |
22541 | ||
348e048f DE |
22542 | return die; |
22543 | } | |
22544 | ||
ac9ec31b DE |
22545 | return NULL; |
22546 | } | |
22547 | ||
22548 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
22549 | On entry *REF_CU is the CU of SRC_DIE. | |
22550 | On exit *REF_CU is the CU of the result. | |
22551 | The result is the DIE of the type. | |
22552 | If the referenced type cannot be found an error is thrown. */ | |
22553 | ||
22554 | static struct die_info * | |
ff39bb5e | 22555 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
22556 | struct dwarf2_cu **ref_cu) |
22557 | { | |
22558 | ULONGEST signature = DW_SIGNATURE (attr); | |
22559 | struct signatured_type *sig_type; | |
22560 | struct die_info *die; | |
22561 | ||
22562 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
22563 | ||
a2ce51a0 | 22564 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
22565 | /* sig_type will be NULL if the signatured type is missing from |
22566 | the debug info. */ | |
22567 | if (sig_type == NULL) | |
22568 | { | |
22569 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
22570 | " from DIE at %s [in module %s]"), |
22571 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22572 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22573 | } |
22574 | ||
22575 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
22576 | if (die == NULL) | |
22577 | { | |
22578 | dump_die_for_error (src_die); | |
22579 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
22580 | " from DIE at %s [in module %s]"), |
22581 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22582 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22583 | } |
22584 | ||
22585 | return die; | |
22586 | } | |
22587 | ||
22588 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
22589 | reading in and processing the type unit if necessary. */ | |
22590 | ||
22591 | static struct type * | |
22592 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
22593 | struct dwarf2_cu *cu) | |
22594 | { | |
518817b3 SM |
22595 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22596 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
22597 | struct signatured_type *sig_type; |
22598 | struct dwarf2_cu *type_cu; | |
22599 | struct die_info *type_die; | |
22600 | struct type *type; | |
22601 | ||
a2ce51a0 | 22602 | sig_type = lookup_signatured_type (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 | { | |
b98664d3 | 22607 | complaint (_("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 (die->sect_off), | |
4262abfb | 22610 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22611 | return build_error_marker_type (cu, die); |
22612 | } | |
22613 | ||
22614 | /* If we already know the type we're done. */ | |
22615 | if (sig_type->type != NULL) | |
22616 | return sig_type->type; | |
22617 | ||
22618 | type_cu = cu; | |
22619 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22620 | if (type_die != NULL) | |
22621 | { | |
22622 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22623 | is created. This is important, for example, because for c++ classes | |
22624 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22625 | type = read_type_die (type_die, type_cu); | |
22626 | if (type == NULL) | |
22627 | { | |
b98664d3 | 22628 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
22629 | " referenced from DIE at %s [in module %s]"), |
22630 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22631 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22632 | type = build_error_marker_type (cu, die); |
22633 | } | |
22634 | } | |
22635 | else | |
22636 | { | |
b98664d3 | 22637 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
22638 | " from DIE at %s [in module %s]"), |
22639 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22640 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22641 | type = build_error_marker_type (cu, die); |
22642 | } | |
22643 | sig_type->type = type; | |
22644 | ||
22645 | return type; | |
22646 | } | |
22647 | ||
22648 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22649 | reading in and processing the type unit if necessary. */ | |
22650 | ||
22651 | static struct type * | |
ff39bb5e | 22652 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22653 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22654 | { |
22655 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 22656 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22657 | { |
22658 | struct dwarf2_cu *type_cu = cu; | |
22659 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22660 | ||
22661 | return read_type_die (type_die, type_cu); | |
22662 | } | |
22663 | else if (attr->form == DW_FORM_ref_sig8) | |
22664 | { | |
22665 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22666 | } | |
22667 | else | |
22668 | { | |
518817b3 SM |
22669 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22670 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22671 | |
b98664d3 | 22672 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
22673 | " at %s [in module %s]"), |
22674 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 22675 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22676 | return build_error_marker_type (cu, die); |
22677 | } | |
348e048f DE |
22678 | } |
22679 | ||
e5fe5e75 | 22680 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22681 | |
22682 | static void | |
e5fe5e75 | 22683 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22684 | { |
52dc124a | 22685 | struct signatured_type *sig_type; |
348e048f | 22686 | |
f4dc4d17 | 22687 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 22688 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 22689 | |
6721b2ec DE |
22690 | /* We have the per_cu, but we need the signatured_type. |
22691 | Fortunately this is an easy translation. */ | |
22692 | gdb_assert (per_cu->is_debug_types); | |
22693 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22694 | |
6721b2ec | 22695 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22696 | |
52dc124a | 22697 | read_signatured_type (sig_type); |
348e048f | 22698 | |
6721b2ec | 22699 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22700 | } |
22701 | ||
3019eac3 DE |
22702 | /* Read in a signatured type and build its CU and DIEs. |
22703 | If the type is a stub for the real type in a DWO file, | |
22704 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22705 | |
22706 | static void | |
22707 | read_signatured_type (struct signatured_type *sig_type) | |
22708 | { | |
22709 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22710 | |
3019eac3 | 22711 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22712 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22713 | |
6751ebae | 22714 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
22715 | |
22716 | if (!reader.dummy_p) | |
22717 | { | |
22718 | struct dwarf2_cu *cu = reader.cu; | |
22719 | const gdb_byte *info_ptr = reader.info_ptr; | |
22720 | ||
22721 | gdb_assert (cu->die_hash == NULL); | |
22722 | cu->die_hash = | |
22723 | htab_create_alloc_ex (cu->header.length / 12, | |
22724 | die_hash, | |
22725 | die_eq, | |
22726 | NULL, | |
22727 | &cu->comp_unit_obstack, | |
22728 | hashtab_obstack_allocate, | |
22729 | dummy_obstack_deallocate); | |
22730 | ||
3e225074 | 22731 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
22732 | reader.comp_unit_die->child |
22733 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
22734 | reader.comp_unit_die); | |
22735 | cu->dies = reader.comp_unit_die; | |
22736 | /* comp_unit_die is not stored in die_hash, no need. */ | |
22737 | ||
22738 | /* We try not to read any attributes in this function, because | |
22739 | not all CUs needed for references have been loaded yet, and | |
22740 | symbol table processing isn't initialized. But we have to | |
22741 | set the CU language, or we won't be able to build types | |
22742 | correctly. Similarly, if we do not read the producer, we can | |
22743 | not apply producer-specific interpretation. */ | |
22744 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
22745 | |
22746 | reader.keep (); | |
c0ab21c2 TT |
22747 | } |
22748 | ||
7ee85ab1 | 22749 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22750 | } |
22751 | ||
c906108c SS |
22752 | /* Decode simple location descriptions. |
22753 | Given a pointer to a dwarf block that defines a location, compute | |
7d79de9a TT |
22754 | the location and return the value. If COMPUTED is non-null, it is |
22755 | set to true to indicate that decoding was successful, and false | |
22756 | otherwise. If COMPUTED is null, then this function may emit a | |
22757 | complaint. */ | |
c906108c SS |
22758 | |
22759 | static CORE_ADDR | |
7d79de9a | 22760 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu, bool *computed) |
c906108c | 22761 | { |
518817b3 | 22762 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
22763 | size_t i; |
22764 | size_t size = blk->size; | |
d521ce57 | 22765 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22766 | CORE_ADDR stack[64]; |
22767 | int stacki; | |
22768 | unsigned int bytes_read, unsnd; | |
22769 | gdb_byte op; | |
c906108c | 22770 | |
7d79de9a TT |
22771 | if (computed != nullptr) |
22772 | *computed = false; | |
22773 | ||
21ae7a4d JK |
22774 | i = 0; |
22775 | stacki = 0; | |
22776 | stack[stacki] = 0; | |
22777 | stack[++stacki] = 0; | |
22778 | ||
22779 | while (i < size) | |
22780 | { | |
22781 | op = data[i++]; | |
22782 | switch (op) | |
22783 | { | |
22784 | case DW_OP_lit0: | |
22785 | case DW_OP_lit1: | |
22786 | case DW_OP_lit2: | |
22787 | case DW_OP_lit3: | |
22788 | case DW_OP_lit4: | |
22789 | case DW_OP_lit5: | |
22790 | case DW_OP_lit6: | |
22791 | case DW_OP_lit7: | |
22792 | case DW_OP_lit8: | |
22793 | case DW_OP_lit9: | |
22794 | case DW_OP_lit10: | |
22795 | case DW_OP_lit11: | |
22796 | case DW_OP_lit12: | |
22797 | case DW_OP_lit13: | |
22798 | case DW_OP_lit14: | |
22799 | case DW_OP_lit15: | |
22800 | case DW_OP_lit16: | |
22801 | case DW_OP_lit17: | |
22802 | case DW_OP_lit18: | |
22803 | case DW_OP_lit19: | |
22804 | case DW_OP_lit20: | |
22805 | case DW_OP_lit21: | |
22806 | case DW_OP_lit22: | |
22807 | case DW_OP_lit23: | |
22808 | case DW_OP_lit24: | |
22809 | case DW_OP_lit25: | |
22810 | case DW_OP_lit26: | |
22811 | case DW_OP_lit27: | |
22812 | case DW_OP_lit28: | |
22813 | case DW_OP_lit29: | |
22814 | case DW_OP_lit30: | |
22815 | case DW_OP_lit31: | |
22816 | stack[++stacki] = op - DW_OP_lit0; | |
22817 | break; | |
f1bea926 | 22818 | |
21ae7a4d JK |
22819 | case DW_OP_reg0: |
22820 | case DW_OP_reg1: | |
22821 | case DW_OP_reg2: | |
22822 | case DW_OP_reg3: | |
22823 | case DW_OP_reg4: | |
22824 | case DW_OP_reg5: | |
22825 | case DW_OP_reg6: | |
22826 | case DW_OP_reg7: | |
22827 | case DW_OP_reg8: | |
22828 | case DW_OP_reg9: | |
22829 | case DW_OP_reg10: | |
22830 | case DW_OP_reg11: | |
22831 | case DW_OP_reg12: | |
22832 | case DW_OP_reg13: | |
22833 | case DW_OP_reg14: | |
22834 | case DW_OP_reg15: | |
22835 | case DW_OP_reg16: | |
22836 | case DW_OP_reg17: | |
22837 | case DW_OP_reg18: | |
22838 | case DW_OP_reg19: | |
22839 | case DW_OP_reg20: | |
22840 | case DW_OP_reg21: | |
22841 | case DW_OP_reg22: | |
22842 | case DW_OP_reg23: | |
22843 | case DW_OP_reg24: | |
22844 | case DW_OP_reg25: | |
22845 | case DW_OP_reg26: | |
22846 | case DW_OP_reg27: | |
22847 | case DW_OP_reg28: | |
22848 | case DW_OP_reg29: | |
22849 | case DW_OP_reg30: | |
22850 | case DW_OP_reg31: | |
22851 | stack[++stacki] = op - DW_OP_reg0; | |
22852 | if (i < size) | |
7d79de9a TT |
22853 | { |
22854 | if (computed == nullptr) | |
22855 | dwarf2_complex_location_expr_complaint (); | |
22856 | else | |
22857 | return 0; | |
22858 | } | |
21ae7a4d | 22859 | break; |
c906108c | 22860 | |
21ae7a4d JK |
22861 | case DW_OP_regx: |
22862 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22863 | i += bytes_read; | |
22864 | stack[++stacki] = unsnd; | |
22865 | if (i < size) | |
7d79de9a TT |
22866 | { |
22867 | if (computed == nullptr) | |
22868 | dwarf2_complex_location_expr_complaint (); | |
22869 | else | |
22870 | return 0; | |
22871 | } | |
21ae7a4d | 22872 | break; |
c906108c | 22873 | |
21ae7a4d | 22874 | case DW_OP_addr: |
c8a7a66f TT |
22875 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
22876 | &bytes_read); | |
21ae7a4d JK |
22877 | i += bytes_read; |
22878 | break; | |
d53d4ac5 | 22879 | |
21ae7a4d JK |
22880 | case DW_OP_const1u: |
22881 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22882 | i += 1; | |
22883 | break; | |
22884 | ||
22885 | case DW_OP_const1s: | |
22886 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22887 | i += 1; | |
22888 | break; | |
22889 | ||
22890 | case DW_OP_const2u: | |
22891 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22892 | i += 2; | |
22893 | break; | |
22894 | ||
22895 | case DW_OP_const2s: | |
22896 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22897 | i += 2; | |
22898 | break; | |
d53d4ac5 | 22899 | |
21ae7a4d JK |
22900 | case DW_OP_const4u: |
22901 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22902 | i += 4; | |
22903 | break; | |
22904 | ||
22905 | case DW_OP_const4s: | |
22906 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22907 | i += 4; | |
22908 | break; | |
22909 | ||
585861ea JK |
22910 | case DW_OP_const8u: |
22911 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22912 | i += 8; | |
22913 | break; | |
22914 | ||
21ae7a4d JK |
22915 | case DW_OP_constu: |
22916 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22917 | &bytes_read); | |
22918 | i += bytes_read; | |
22919 | break; | |
22920 | ||
22921 | case DW_OP_consts: | |
22922 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22923 | i += bytes_read; | |
22924 | break; | |
22925 | ||
22926 | case DW_OP_dup: | |
22927 | stack[stacki + 1] = stack[stacki]; | |
22928 | stacki++; | |
22929 | break; | |
22930 | ||
22931 | case DW_OP_plus: | |
22932 | stack[stacki - 1] += stack[stacki]; | |
22933 | stacki--; | |
22934 | break; | |
22935 | ||
22936 | case DW_OP_plus_uconst: | |
22937 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22938 | &bytes_read); | |
22939 | i += bytes_read; | |
22940 | break; | |
22941 | ||
22942 | case DW_OP_minus: | |
22943 | stack[stacki - 1] -= stack[stacki]; | |
22944 | stacki--; | |
22945 | break; | |
22946 | ||
22947 | case DW_OP_deref: | |
22948 | /* If we're not the last op, then we definitely can't encode | |
22949 | this using GDB's address_class enum. This is valid for partial | |
22950 | global symbols, although the variable's address will be bogus | |
22951 | in the psymtab. */ | |
22952 | if (i < size) | |
7d79de9a TT |
22953 | { |
22954 | if (computed == nullptr) | |
22955 | dwarf2_complex_location_expr_complaint (); | |
22956 | else | |
22957 | return 0; | |
22958 | } | |
21ae7a4d JK |
22959 | break; |
22960 | ||
22961 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22962 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22963 | /* The top of the stack has the offset from the beginning |
22964 | of the thread control block at which the variable is located. */ | |
22965 | /* Nothing should follow this operator, so the top of stack would | |
22966 | be returned. */ | |
22967 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22968 | address will be bogus in the psymtab. Make it always at least |
22969 | non-zero to not look as a variable garbage collected by linker | |
22970 | which have DW_OP_addr 0. */ | |
21ae7a4d | 22971 | if (i < size) |
7d79de9a TT |
22972 | { |
22973 | if (computed == nullptr) | |
22974 | dwarf2_complex_location_expr_complaint (); | |
22975 | else | |
22976 | return 0; | |
22977 | } | |
585861ea | 22978 | stack[stacki]++; |
21ae7a4d JK |
22979 | break; |
22980 | ||
22981 | case DW_OP_GNU_uninit: | |
7d79de9a TT |
22982 | if (computed != nullptr) |
22983 | return 0; | |
21ae7a4d JK |
22984 | break; |
22985 | ||
336d760d | 22986 | case DW_OP_addrx: |
3019eac3 | 22987 | case DW_OP_GNU_addr_index: |
49f6c839 | 22988 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22989 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22990 | &bytes_read); | |
22991 | i += bytes_read; | |
22992 | break; | |
22993 | ||
21ae7a4d | 22994 | default: |
7d79de9a TT |
22995 | if (computed == nullptr) |
22996 | { | |
22997 | const char *name = get_DW_OP_name (op); | |
21ae7a4d | 22998 | |
7d79de9a TT |
22999 | if (name) |
23000 | complaint (_("unsupported stack op: '%s'"), | |
23001 | name); | |
23002 | else | |
23003 | complaint (_("unsupported stack op: '%02x'"), | |
23004 | op); | |
23005 | } | |
21ae7a4d JK |
23006 | |
23007 | return (stack[stacki]); | |
d53d4ac5 | 23008 | } |
3c6e0cb3 | 23009 | |
21ae7a4d JK |
23010 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
23011 | outside of the allocated space. Also enforce minimum>0. */ | |
23012 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
23013 | { | |
7d79de9a TT |
23014 | if (computed == nullptr) |
23015 | complaint (_("location description stack overflow")); | |
21ae7a4d JK |
23016 | return 0; |
23017 | } | |
23018 | ||
23019 | if (stacki <= 0) | |
23020 | { | |
7d79de9a TT |
23021 | if (computed == nullptr) |
23022 | complaint (_("location description stack underflow")); | |
21ae7a4d JK |
23023 | return 0; |
23024 | } | |
23025 | } | |
7d79de9a TT |
23026 | |
23027 | if (computed != nullptr) | |
23028 | *computed = true; | |
21ae7a4d | 23029 | return (stack[stacki]); |
c906108c SS |
23030 | } |
23031 | ||
23032 | /* memory allocation interface */ | |
23033 | ||
c906108c | 23034 | static struct dwarf_block * |
7b5a2f43 | 23035 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23036 | { |
8d749320 | 23037 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23038 | } |
23039 | ||
c906108c | 23040 | static struct die_info * |
b60c80d6 | 23041 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23042 | { |
23043 | struct die_info *die; | |
b60c80d6 DJ |
23044 | size_t size = sizeof (struct die_info); |
23045 | ||
23046 | if (num_attrs > 1) | |
23047 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23048 | |
b60c80d6 | 23049 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23050 | memset (die, 0, sizeof (struct die_info)); |
23051 | return (die); | |
23052 | } | |
2e276125 JB |
23053 | |
23054 | \f | |
a036ba48 | 23055 | |
c90ec28a | 23056 | /* Macro support. */ |
cf2c3c16 | 23057 | |
9eac9650 TT |
23058 | /* An overload of dwarf_decode_macros that finds the correct section |
23059 | and ensures it is read in before calling the other overload. */ | |
23060 | ||
23061 | static void | |
23062 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, | |
23063 | int section_is_gnu) | |
23064 | { | |
23065 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
23066 | = cu->per_cu->dwarf2_per_objfile; | |
23067 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5a0e026f | 23068 | const struct line_header *lh = cu->line_header; |
9eac9650 TT |
23069 | unsigned int offset_size = cu->header.offset_size; |
23070 | struct dwarf2_section_info *section; | |
23071 | const char *section_name; | |
23072 | ||
23073 | if (cu->dwo_unit != nullptr) | |
23074 | { | |
23075 | if (section_is_gnu) | |
23076 | { | |
23077 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23078 | section_name = ".debug_macro.dwo"; | |
23079 | } | |
23080 | else | |
23081 | { | |
23082 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23083 | section_name = ".debug_macinfo.dwo"; | |
23084 | } | |
23085 | } | |
23086 | else | |
23087 | { | |
23088 | if (section_is_gnu) | |
23089 | { | |
23090 | section = &dwarf2_per_objfile->macro; | |
23091 | section_name = ".debug_macro"; | |
23092 | } | |
23093 | else | |
23094 | { | |
23095 | section = &dwarf2_per_objfile->macinfo; | |
23096 | section_name = ".debug_macinfo"; | |
23097 | } | |
23098 | } | |
23099 | ||
23100 | section->read (objfile); | |
23101 | if (section->buffer == nullptr) | |
23102 | { | |
23103 | complaint (_("missing %s section"), section_name); | |
23104 | return; | |
23105 | } | |
23106 | ||
23107 | buildsym_compunit *builder = cu->get_builder (); | |
23108 | ||
23109 | dwarf_decode_macros (dwarf2_per_objfile, builder, section, lh, | |
23110 | offset_size, offset, section_is_gnu); | |
23111 | } | |
23112 | ||
3019eac3 DE |
23113 | /* Return the .debug_loc section to use for CU. |
23114 | For DWO files use .debug_loc.dwo. */ | |
23115 | ||
23116 | static struct dwarf2_section_info * | |
23117 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23118 | { | |
518817b3 SM |
23119 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23120 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23121 | |
3019eac3 | 23122 | if (cu->dwo_unit) |
43988095 JK |
23123 | { |
23124 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 23125 | |
43988095 JK |
23126 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
23127 | } | |
23128 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23129 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23130 | } |
23131 | ||
8cf6f0b1 TT |
23132 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23133 | ||
23134 | static void | |
23135 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23136 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23137 | const struct attribute *attr) |
8cf6f0b1 | 23138 | { |
518817b3 SM |
23139 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23140 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
23141 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23142 | ||
96b79293 | 23143 | section->read (dwarf2_per_objfile->objfile); |
8cf6f0b1 TT |
23144 | |
23145 | baton->per_cu = cu->per_cu; | |
23146 | gdb_assert (baton->per_cu); | |
23147 | /* We don't know how long the location list is, but make sure we | |
23148 | don't run off the edge of the section. */ | |
3019eac3 DE |
23149 | baton->size = section->size - DW_UNSND (attr); |
23150 | baton->data = section->buffer + DW_UNSND (attr); | |
2b24b6e4 TT |
23151 | if (cu->base_address.has_value ()) |
23152 | baton->base_address = *cu->base_address; | |
23153 | else | |
23154 | baton->base_address = 0; | |
f664829e | 23155 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23156 | } |
23157 | ||
4c2df51b | 23158 | static void |
ff39bb5e | 23159 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23160 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23161 | { |
518817b3 SM |
23162 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23163 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 23164 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23165 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23166 | |
cd6c91b4 | 23167 | if (attr->form_is_section_offset () |
3019eac3 | 23168 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23169 | the section. If so, fall through to the complaint in the |
23170 | other branch. */ | |
2c7d5afc | 23171 | && DW_UNSND (attr) < section->get_size (objfile)) |
4c2df51b | 23172 | { |
0d53c4c4 | 23173 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23174 | |
8d749320 | 23175 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23176 | |
8cf6f0b1 | 23177 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23178 | |
2b24b6e4 | 23179 | if (!cu->base_address.has_value ()) |
b98664d3 | 23180 | complaint (_("Location list used without " |
3e43a32a | 23181 | "specifying the CU base address.")); |
4c2df51b | 23182 | |
f1e6e072 TT |
23183 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23184 | ? dwarf2_loclist_block_index | |
23185 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23186 | SYMBOL_LOCATION_BATON (sym) = baton; |
23187 | } | |
23188 | else | |
23189 | { | |
23190 | struct dwarf2_locexpr_baton *baton; | |
23191 | ||
8d749320 | 23192 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23193 | baton->per_cu = cu->per_cu; |
23194 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 23195 | |
4fc6c0d5 | 23196 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
23197 | { |
23198 | /* Note that we're just copying the block's data pointer | |
23199 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23200 | info_buffer for SYM's objfile; right now we never release |
23201 | that buffer, but when we do clean up properly this may | |
23202 | need to change. */ | |
0d53c4c4 DJ |
23203 | baton->size = DW_BLOCK (attr)->size; |
23204 | baton->data = DW_BLOCK (attr)->data; | |
23205 | } | |
23206 | else | |
23207 | { | |
23208 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 23209 | sym->natural_name ()); |
0d53c4c4 | 23210 | baton->size = 0; |
0d53c4c4 | 23211 | } |
6e70227d | 23212 | |
f1e6e072 TT |
23213 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23214 | ? dwarf2_locexpr_block_index | |
23215 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23216 | SYMBOL_LOCATION_BATON (sym) = baton; |
23217 | } | |
4c2df51b | 23218 | } |
6502dd73 | 23219 | |
09ba997f | 23220 | /* See read.h. */ |
ae0d2f24 UW |
23221 | |
23222 | struct objfile * | |
09ba997f | 23223 | dwarf2_per_cu_data::objfile () const |
ae0d2f24 | 23224 | { |
09ba997f | 23225 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
23226 | |
23227 | /* Return the master objfile, so that we can report and look up the | |
23228 | correct file containing this variable. */ | |
23229 | if (objfile->separate_debug_objfile_backlink) | |
23230 | objfile = objfile->separate_debug_objfile_backlink; | |
23231 | ||
23232 | return objfile; | |
23233 | } | |
23234 | ||
96408a79 SA |
23235 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23236 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23237 | CU_HEADERP first. */ | |
23238 | ||
23239 | static const struct comp_unit_head * | |
23240 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
09ba997f | 23241 | const struct dwarf2_per_cu_data *per_cu) |
96408a79 | 23242 | { |
d521ce57 | 23243 | const gdb_byte *info_ptr; |
96408a79 SA |
23244 | |
23245 | if (per_cu->cu) | |
23246 | return &per_cu->cu->header; | |
23247 | ||
9c541725 | 23248 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23249 | |
23250 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23251 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23252 | rcuh_kind::COMPILE); | |
96408a79 SA |
23253 | |
23254 | return cu_headerp; | |
23255 | } | |
23256 | ||
09ba997f | 23257 | /* See read.h. */ |
ae0d2f24 | 23258 | |
98714339 | 23259 | int |
09ba997f | 23260 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 23261 | { |
96408a79 SA |
23262 | struct comp_unit_head cu_header_local; |
23263 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23264 | |
09ba997f | 23265 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23266 | |
23267 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23268 | } |
23269 | ||
09ba997f | 23270 | /* See read.h. */ |
9eae7c52 TT |
23271 | |
23272 | int | |
09ba997f | 23273 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 23274 | { |
96408a79 SA |
23275 | struct comp_unit_head cu_header_local; |
23276 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23277 | |
09ba997f | 23278 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23279 | |
23280 | return cu_headerp->offset_size; | |
23281 | } | |
23282 | ||
09ba997f | 23283 | /* See read.h. */ |
96408a79 SA |
23284 | |
23285 | int | |
09ba997f | 23286 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 SA |
23287 | { |
23288 | struct comp_unit_head cu_header_local; | |
23289 | const struct comp_unit_head *cu_headerp; | |
23290 | ||
09ba997f | 23291 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23292 | |
23293 | if (cu_headerp->version == 2) | |
23294 | return cu_headerp->addr_size; | |
23295 | else | |
23296 | return cu_headerp->offset_size; | |
181cebd4 JK |
23297 | } |
23298 | ||
09ba997f | 23299 | /* See read.h. */ |
9aa1f1e3 TT |
23300 | |
23301 | CORE_ADDR | |
09ba997f | 23302 | dwarf2_per_cu_data::text_offset () const |
9aa1f1e3 | 23303 | { |
09ba997f TT |
23304 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
23305 | ||
23306 | return objfile->text_section_offset (); | |
9aa1f1e3 TT |
23307 | } |
23308 | ||
09ba997f TT |
23309 | /* See read.h. */ |
23310 | ||
23311 | struct type * | |
23312 | dwarf2_per_cu_data::addr_type () const | |
9a49df9d | 23313 | { |
09ba997f | 23314 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
23315 | struct type *void_type = objfile_type (objfile)->builtin_void; |
23316 | struct type *addr_type = lookup_pointer_type (void_type); | |
09ba997f | 23317 | int addr_size = this->addr_size (); |
9a49df9d AB |
23318 | |
23319 | if (TYPE_LENGTH (addr_type) == addr_size) | |
23320 | return addr_type; | |
23321 | ||
09ba997f | 23322 | addr_type = addr_sized_int_type (TYPE_UNSIGNED (addr_type)); |
9a49df9d AB |
23323 | return addr_type; |
23324 | } | |
23325 | ||
22b6cd70 TT |
23326 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
23327 | the index of the result, and that searches a vector. It will | |
23328 | return a result even if the offset in question does not actually | |
23329 | occur in any CU. This is separate so that it can be unit | |
23330 | tested. */ | |
ae038cb0 | 23331 | |
22b6cd70 TT |
23332 | static int |
23333 | dwarf2_find_containing_comp_unit | |
23334 | (sect_offset sect_off, | |
23335 | unsigned int offset_in_dwz, | |
23336 | const std::vector<dwarf2_per_cu_data *> &all_comp_units) | |
ae038cb0 | 23337 | { |
ae038cb0 DJ |
23338 | int low, high; |
23339 | ||
ae038cb0 | 23340 | low = 0; |
22b6cd70 | 23341 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
23342 | while (high > low) |
23343 | { | |
36586728 | 23344 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23345 | int mid = low + (high - low) / 2; |
9a619af0 | 23346 | |
22b6cd70 | 23347 | mid_cu = all_comp_units[mid]; |
36586728 | 23348 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 23349 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 23350 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
23351 | high = mid; |
23352 | else | |
23353 | low = mid + 1; | |
23354 | } | |
23355 | gdb_assert (low == high); | |
22b6cd70 TT |
23356 | return low; |
23357 | } | |
23358 | ||
23359 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
23360 | the DIE at OFFSET. Raises an error on failure. */ | |
23361 | ||
23362 | static struct dwarf2_per_cu_data * | |
23363 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
23364 | unsigned int offset_in_dwz, | |
23365 | struct dwarf2_per_objfile *dwarf2_per_objfile) | |
23366 | { | |
23367 | int low | |
23368 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
23369 | dwarf2_per_objfile->all_comp_units); | |
23370 | struct dwarf2_per_cu_data *this_cu | |
23371 | = dwarf2_per_objfile->all_comp_units[low]; | |
23372 | ||
45b8ae0c | 23373 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 23374 | { |
36586728 | 23375 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23376 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
23377 | "offset %s [in module %s]"), |
23378 | sect_offset_str (sect_off), | |
ed2dc618 | 23379 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 23380 | |
9c541725 PA |
23381 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23382 | <= sect_off); | |
ae038cb0 DJ |
23383 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23384 | } | |
23385 | else | |
23386 | { | |
b76e467d | 23387 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 23388 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 23389 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 23390 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
23391 | return this_cu; |
23392 | } | |
23393 | } | |
23394 | ||
22b6cd70 TT |
23395 | #if GDB_SELF_TEST |
23396 | ||
23397 | namespace selftests { | |
23398 | namespace find_containing_comp_unit { | |
23399 | ||
23400 | static void | |
23401 | run_test () | |
23402 | { | |
23403 | struct dwarf2_per_cu_data one {}; | |
23404 | struct dwarf2_per_cu_data two {}; | |
23405 | struct dwarf2_per_cu_data three {}; | |
23406 | struct dwarf2_per_cu_data four {}; | |
23407 | ||
23408 | one.length = 5; | |
23409 | two.sect_off = sect_offset (one.length); | |
23410 | two.length = 7; | |
23411 | ||
23412 | three.length = 5; | |
23413 | three.is_dwz = 1; | |
23414 | four.sect_off = sect_offset (three.length); | |
23415 | four.length = 7; | |
23416 | four.is_dwz = 1; | |
23417 | ||
23418 | std::vector<dwarf2_per_cu_data *> units; | |
23419 | units.push_back (&one); | |
23420 | units.push_back (&two); | |
23421 | units.push_back (&three); | |
23422 | units.push_back (&four); | |
23423 | ||
23424 | int result; | |
23425 | ||
23426 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
23427 | SELF_CHECK (units[result] == &one); | |
23428 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); | |
23429 | SELF_CHECK (units[result] == &one); | |
23430 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); | |
23431 | SELF_CHECK (units[result] == &two); | |
23432 | ||
23433 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
23434 | SELF_CHECK (units[result] == &three); | |
23435 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); | |
23436 | SELF_CHECK (units[result] == &three); | |
23437 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); | |
23438 | SELF_CHECK (units[result] == &four); | |
23439 | } | |
23440 | ||
23441 | } | |
23442 | } | |
23443 | ||
23444 | #endif /* GDB_SELF_TEST */ | |
23445 | ||
23745b47 | 23446 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23447 | |
fcd3b13d SM |
23448 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
23449 | : per_cu (per_cu_), | |
9068261f AB |
23450 | mark (false), |
23451 | has_loclist (false), | |
23452 | checked_producer (false), | |
23453 | producer_is_gxx_lt_4_6 (false), | |
23454 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 23455 | producer_is_icc (false), |
9068261f | 23456 | producer_is_icc_lt_14 (false), |
c258c396 | 23457 | producer_is_codewarrior (false), |
9068261f | 23458 | processing_has_namespace_info (false) |
93311388 | 23459 | { |
fcd3b13d SM |
23460 | per_cu->cu = this; |
23461 | } | |
23462 | ||
23463 | /* Destroy a dwarf2_cu. */ | |
23464 | ||
23465 | dwarf2_cu::~dwarf2_cu () | |
23466 | { | |
23467 | per_cu->cu = NULL; | |
9816fde3 JK |
23468 | } |
23469 | ||
23470 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23471 | ||
23472 | static void | |
95554aad TT |
23473 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23474 | enum language pretend_language) | |
9816fde3 JK |
23475 | { |
23476 | struct attribute *attr; | |
23477 | ||
23478 | /* Set the language we're debugging. */ | |
23479 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 23480 | if (attr != nullptr) |
9816fde3 JK |
23481 | set_cu_language (DW_UNSND (attr), cu); |
23482 | else | |
9cded63f | 23483 | { |
95554aad | 23484 | cu->language = pretend_language; |
9cded63f TT |
23485 | cu->language_defn = language_def (cu->language); |
23486 | } | |
dee91e82 | 23487 | |
7d45c7c3 | 23488 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23489 | } |
23490 | ||
ae038cb0 DJ |
23491 | /* Increase the age counter on each cached compilation unit, and free |
23492 | any that are too old. */ | |
23493 | ||
23494 | static void | |
ed2dc618 | 23495 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
23496 | { |
23497 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23498 | ||
23499 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23500 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23501 | while (per_cu != NULL) | |
23502 | { | |
23503 | per_cu->cu->last_used ++; | |
b4f54984 | 23504 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23505 | dwarf2_mark (per_cu->cu); |
23506 | per_cu = per_cu->cu->read_in_chain; | |
23507 | } | |
23508 | ||
23509 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23510 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23511 | while (per_cu != NULL) | |
23512 | { | |
23513 | struct dwarf2_per_cu_data *next_cu; | |
23514 | ||
23515 | next_cu = per_cu->cu->read_in_chain; | |
23516 | ||
23517 | if (!per_cu->cu->mark) | |
23518 | { | |
fcd3b13d | 23519 | delete per_cu->cu; |
ae038cb0 DJ |
23520 | *last_chain = next_cu; |
23521 | } | |
23522 | else | |
23523 | last_chain = &per_cu->cu->read_in_chain; | |
23524 | ||
23525 | per_cu = next_cu; | |
23526 | } | |
23527 | } | |
23528 | ||
23529 | /* Remove a single compilation unit from the cache. */ | |
23530 | ||
23531 | static void | |
dee91e82 | 23532 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23533 | { |
23534 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
23535 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23536 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
23537 | |
23538 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23539 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23540 | while (per_cu != NULL) | |
23541 | { | |
23542 | struct dwarf2_per_cu_data *next_cu; | |
23543 | ||
23544 | next_cu = per_cu->cu->read_in_chain; | |
23545 | ||
dee91e82 | 23546 | if (per_cu == target_per_cu) |
ae038cb0 | 23547 | { |
fcd3b13d | 23548 | delete per_cu->cu; |
dee91e82 | 23549 | per_cu->cu = NULL; |
ae038cb0 DJ |
23550 | *last_chain = next_cu; |
23551 | break; | |
23552 | } | |
23553 | else | |
23554 | last_chain = &per_cu->cu->read_in_chain; | |
23555 | ||
23556 | per_cu = next_cu; | |
23557 | } | |
23558 | } | |
23559 | ||
dee91e82 DE |
23560 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23561 | We store these in a hash table separate from the DIEs, and preserve them | |
23562 | when the DIEs are flushed out of cache. | |
23563 | ||
23564 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23565 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23566 | or the type may come from a DWO file. Furthermore, while it's more logical |
23567 | to use per_cu->section+offset, with Fission the section with the data is in | |
23568 | the DWO file but we don't know that section at the point we need it. | |
23569 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23570 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23571 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23572 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23573 | |
dee91e82 | 23574 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23575 | { |
dee91e82 | 23576 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23577 | sect_offset sect_off; |
1c379e20 DJ |
23578 | struct type *type; |
23579 | }; | |
23580 | ||
dee91e82 | 23581 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23582 | |
23583 | static hashval_t | |
dee91e82 | 23584 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23585 | { |
9a3c8263 SM |
23586 | const struct dwarf2_per_cu_offset_and_type *ofs |
23587 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23588 | |
9c541725 | 23589 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23590 | } |
23591 | ||
dee91e82 | 23592 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23593 | |
23594 | static int | |
dee91e82 | 23595 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23596 | { |
9a3c8263 SM |
23597 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23598 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23599 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23600 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23601 | |
dee91e82 | 23602 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23603 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23604 | } |
23605 | ||
23606 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23607 | table if necessary. For convenience, return TYPE. |
23608 | ||
23609 | The DIEs reading must have careful ordering to: | |
85102364 | 23610 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
23611 | reading current DIE. |
23612 | * Not trying to dereference contents of still incompletely read in types | |
23613 | while reading in other DIEs. | |
23614 | * Enable referencing still incompletely read in types just by a pointer to | |
23615 | the type without accessing its fields. | |
23616 | ||
23617 | Therefore caller should follow these rules: | |
23618 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23619 | before building the type and calling set_die_type. | |
e71ec853 | 23620 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23621 | possible before fetching more types to complete the current type. |
23622 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23623 | |
f792889a | 23624 | static struct type * |
1c379e20 DJ |
23625 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23626 | { | |
518817b3 SM |
23627 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23628 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 23629 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 23630 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
23631 | struct attribute *attr; |
23632 | struct dynamic_prop prop; | |
1c379e20 | 23633 | |
b4ba55a1 JB |
23634 | /* For Ada types, make sure that the gnat-specific data is always |
23635 | initialized (if not already set). There are a few types where | |
23636 | we should not be doing so, because the type-specific area is | |
23637 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23638 | where the type-specific area is used to store the floatformat). | |
23639 | But this is not a problem, because the gnat-specific information | |
23640 | is actually not needed for these types. */ | |
23641 | if (need_gnat_info (cu) | |
78134374 SM |
23642 | && type->code () != TYPE_CODE_FUNC |
23643 | && type->code () != TYPE_CODE_FLT | |
23644 | && type->code () != TYPE_CODE_METHODPTR | |
23645 | && type->code () != TYPE_CODE_MEMBERPTR | |
23646 | && type->code () != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23647 | && !HAVE_GNAT_AUX_INFO (type)) |
23648 | INIT_GNAT_SPECIFIC (type); | |
23649 | ||
3f2f83dd KB |
23650 | /* Read DW_AT_allocated and set in type. */ |
23651 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
4fc6c0d5 | 23652 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 23653 | { |
09ba997f | 23654 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 23655 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
5c54719c | 23656 | type->add_dyn_prop (DYN_PROP_ALLOCATED, prop); |
3f2f83dd KB |
23657 | } |
23658 | else if (attr != NULL) | |
23659 | { | |
b98664d3 | 23660 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 23661 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 23662 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
23663 | } |
23664 | ||
23665 | /* Read DW_AT_associated and set in type. */ | |
23666 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
4fc6c0d5 | 23667 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 23668 | { |
09ba997f | 23669 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 23670 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
5c54719c | 23671 | type->add_dyn_prop (DYN_PROP_ASSOCIATED, prop); |
3f2f83dd KB |
23672 | } |
23673 | else if (attr != NULL) | |
23674 | { | |
b98664d3 | 23675 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 23676 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 23677 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
23678 | } |
23679 | ||
3cdcd0ce JB |
23680 | /* Read DW_AT_data_location and set in type. */ |
23681 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d | 23682 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
09ba997f | 23683 | cu->per_cu->addr_type ())) |
5c54719c | 23684 | type->add_dyn_prop (DYN_PROP_DATA_LOCATION, prop); |
3cdcd0ce | 23685 | |
dee91e82 | 23686 | if (dwarf2_per_objfile->die_type_hash == NULL) |
0335378b TT |
23687 | dwarf2_per_objfile->die_type_hash |
23688 | = htab_up (htab_create_alloc (127, | |
23689 | per_cu_offset_and_type_hash, | |
23690 | per_cu_offset_and_type_eq, | |
23691 | NULL, xcalloc, xfree)); | |
1c379e20 | 23692 | |
dee91e82 | 23693 | ofs.per_cu = cu->per_cu; |
9c541725 | 23694 | ofs.sect_off = die->sect_off; |
1c379e20 | 23695 | ofs.type = type; |
dee91e82 | 23696 | slot = (struct dwarf2_per_cu_offset_and_type **) |
0335378b | 23697 | htab_find_slot (dwarf2_per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 23698 | if (*slot) |
b98664d3 | 23699 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 23700 | sect_offset_str (die->sect_off)); |
8d749320 SM |
23701 | *slot = XOBNEW (&objfile->objfile_obstack, |
23702 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23703 | **slot = ofs; |
f792889a | 23704 | return type; |
1c379e20 DJ |
23705 | } |
23706 | ||
9c541725 | 23707 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23708 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23709 | |
23710 | static struct type * | |
9c541725 | 23711 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23712 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23713 | { |
dee91e82 | 23714 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 23715 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 23716 | |
dee91e82 | 23717 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23718 | return NULL; |
1c379e20 | 23719 | |
dee91e82 | 23720 | ofs.per_cu = per_cu; |
9c541725 | 23721 | ofs.sect_off = sect_off; |
9a3c8263 | 23722 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
0335378b | 23723 | htab_find (dwarf2_per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
23724 | if (slot) |
23725 | return slot->type; | |
23726 | else | |
23727 | return NULL; | |
23728 | } | |
23729 | ||
02142a6c | 23730 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23731 | or return NULL if DIE does not have a saved type. */ |
23732 | ||
23733 | static struct type * | |
23734 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23735 | { | |
9c541725 | 23736 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23737 | } |
23738 | ||
10b3939b DJ |
23739 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23740 | ||
23741 | static void | |
23742 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23743 | struct dwarf2_per_cu_data *ref_per_cu) | |
23744 | { | |
23745 | void **slot; | |
23746 | ||
23747 | if (cu->dependencies == NULL) | |
23748 | cu->dependencies | |
23749 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23750 | NULL, &cu->comp_unit_obstack, | |
23751 | hashtab_obstack_allocate, | |
23752 | dummy_obstack_deallocate); | |
23753 | ||
23754 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23755 | if (*slot == NULL) | |
23756 | *slot = ref_per_cu; | |
23757 | } | |
1c379e20 | 23758 | |
f504f079 DE |
23759 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23760 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23761 | cache that we must keep because we are keeping CU. */ |
23762 | ||
10b3939b DJ |
23763 | static int |
23764 | dwarf2_mark_helper (void **slot, void *data) | |
23765 | { | |
23766 | struct dwarf2_per_cu_data *per_cu; | |
23767 | ||
23768 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23769 | |
23770 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23771 | reading of the chain. As such dependencies remain valid it is not much | |
23772 | useful to track and undo them during QUIT cleanups. */ | |
23773 | if (per_cu->cu == NULL) | |
23774 | return 1; | |
23775 | ||
10b3939b DJ |
23776 | if (per_cu->cu->mark) |
23777 | return 1; | |
9068261f | 23778 | per_cu->cu->mark = true; |
10b3939b DJ |
23779 | |
23780 | if (per_cu->cu->dependencies != NULL) | |
23781 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23782 | ||
23783 | return 1; | |
23784 | } | |
23785 | ||
f504f079 DE |
23786 | /* Set the mark field in CU and in every other compilation unit in the |
23787 | cache that we must keep because we are keeping CU. */ | |
23788 | ||
ae038cb0 DJ |
23789 | static void |
23790 | dwarf2_mark (struct dwarf2_cu *cu) | |
23791 | { | |
23792 | if (cu->mark) | |
23793 | return; | |
9068261f | 23794 | cu->mark = true; |
10b3939b DJ |
23795 | if (cu->dependencies != NULL) |
23796 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23797 | } |
23798 | ||
23799 | static void | |
23800 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23801 | { | |
23802 | while (per_cu) | |
23803 | { | |
9068261f | 23804 | per_cu->cu->mark = false; |
ae038cb0 DJ |
23805 | per_cu = per_cu->cu->read_in_chain; |
23806 | } | |
72bf9492 DJ |
23807 | } |
23808 | ||
72bf9492 DJ |
23809 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23810 | is its offset in .debug_info for this objfile. */ | |
23811 | ||
23812 | static hashval_t | |
23813 | partial_die_hash (const void *item) | |
23814 | { | |
9a3c8263 SM |
23815 | const struct partial_die_info *part_die |
23816 | = (const struct partial_die_info *) item; | |
9a619af0 | 23817 | |
9c541725 | 23818 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23819 | } |
23820 | ||
23821 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23822 | are equal if they have the same offset. */ | |
23823 | ||
23824 | static int | |
23825 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23826 | { | |
9a3c8263 SM |
23827 | const struct partial_die_info *part_die_lhs |
23828 | = (const struct partial_die_info *) item_lhs; | |
23829 | const struct partial_die_info *part_die_rhs | |
23830 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23831 | |
9c541725 | 23832 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23833 | } |
23834 | ||
3c3bb058 AB |
23835 | struct cmd_list_element *set_dwarf_cmdlist; |
23836 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 | 23837 | |
9291a0cd | 23838 | static void |
cd4fb1b2 SM |
23839 | show_check_physname (struct ui_file *file, int from_tty, |
23840 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 23841 | { |
cd4fb1b2 SM |
23842 | fprintf_filtered (file, |
23843 | _("Whether to check \"physname\" is %s.\n"), | |
23844 | value); | |
9291a0cd TT |
23845 | } |
23846 | ||
6c265988 | 23847 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 23848 | void |
6c265988 | 23849 | _initialize_dwarf2_read () |
9291a0cd | 23850 | { |
0743fc83 | 23851 | add_basic_prefix_cmd ("dwarf", class_maintenance, _("\ |
cd4fb1b2 | 23852 | Set DWARF specific variables.\n\ |
590042fc | 23853 | Configure DWARF variables such as the cache size."), |
0743fc83 TT |
23854 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
23855 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 23856 | |
0743fc83 | 23857 | add_show_prefix_cmd ("dwarf", class_maintenance, _("\ |
590042fc PW |
23858 | Show DWARF specific variables.\n\ |
23859 | Show DWARF variables such as the cache size."), | |
0743fc83 TT |
23860 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
23861 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 23862 | |
cd4fb1b2 SM |
23863 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
23864 | &dwarf_max_cache_age, _("\ | |
23865 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
23866 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
23867 | A higher limit means that cached compilation units will be stored\n\ | |
23868 | in memory longer, and more total memory will be used. Zero disables\n\ | |
23869 | caching, which can slow down startup."), | |
23870 | NULL, | |
23871 | show_dwarf_max_cache_age, | |
23872 | &set_dwarf_cmdlist, | |
23873 | &show_dwarf_cmdlist); | |
156942c7 | 23874 | |
cd4fb1b2 SM |
23875 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
23876 | Set debugging of the DWARF reader."), _("\ | |
23877 | Show debugging of the DWARF reader."), _("\ | |
23878 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
23879 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
23880 | information. A value greater than 1 provides more verbose information."), | |
23881 | NULL, | |
23882 | NULL, | |
23883 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23884 | |
cd4fb1b2 SM |
23885 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
23886 | Set debugging of the DWARF DIE reader."), _("\ | |
23887 | Show debugging of the DWARF DIE reader."), _("\ | |
23888 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
23889 | The value is the maximum depth to print."), | |
23890 | NULL, | |
23891 | NULL, | |
23892 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23893 | |
cd4fb1b2 SM |
23894 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
23895 | Set debugging of the dwarf line reader."), _("\ | |
23896 | Show debugging of the dwarf line reader."), _("\ | |
23897 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
23898 | A value of 1 (one) provides basic information.\n\ | |
23899 | A value greater than 1 provides more verbose information."), | |
23900 | NULL, | |
23901 | NULL, | |
23902 | &setdebuglist, &showdebuglist); | |
437afbb8 | 23903 | |
cd4fb1b2 SM |
23904 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23905 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23906 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23907 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23908 | the demangler."), | |
23909 | NULL, show_check_physname, | |
23910 | &setdebuglist, &showdebuglist); | |
900e11f9 | 23911 | |
e615022a DE |
23912 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23913 | no_class, &use_deprecated_index_sections, _("\ | |
23914 | Set whether to use deprecated gdb_index sections."), _("\ | |
23915 | Show whether to use deprecated gdb_index sections."), _("\ | |
23916 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23917 | Normally they are ignored either because of a missing feature or\n\ | |
23918 | performance issue.\n\ | |
23919 | Warning: This option must be enabled before gdb reads the file."), | |
23920 | NULL, | |
23921 | NULL, | |
23922 | &setlist, &showlist); | |
23923 | ||
f1e6e072 TT |
23924 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
23925 | &dwarf2_locexpr_funcs); | |
23926 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23927 | &dwarf2_loclist_funcs); | |
23928 | ||
23929 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23930 | &dwarf2_block_frame_base_locexpr_funcs); | |
23931 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23932 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
23933 | |
23934 | #if GDB_SELF_TEST | |
23935 | selftests::register_test ("dw2_expand_symtabs_matching", | |
23936 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
23937 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
23938 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 23939 | #endif |
6502dd73 | 23940 | } |