Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
42a4f53d | 3 | Copyright (C) 1994-2019 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" |
4de283e4 | 32 | #include "dwarf2read.h" |
d55e5aa6 TT |
33 | #include "dwarf-index-cache.h" |
34 | #include "dwarf-index-common.h" | |
4de283e4 TT |
35 | #include "bfd.h" |
36 | #include "elf-bfd.h" | |
37 | #include "symtab.h" | |
38 | #include "gdbtypes.h" | |
39 | #include "objfiles.h" | |
d55e5aa6 | 40 | #include "dwarf2.h" |
4de283e4 TT |
41 | #include "buildsym.h" |
42 | #include "demangle.h" | |
43 | #include "gdb-demangle.h" | |
44 | #include "expression.h" | |
45 | #include "filenames.h" /* for DOSish file names */ | |
46 | #include "macrotab.h" | |
47 | #include "language.h" | |
48 | #include "complaints.h" | |
d55e5aa6 TT |
49 | #include "dwarf2expr.h" |
50 | #include "dwarf2loc.h" | |
4de283e4 TT |
51 | #include "cp-support.h" |
52 | #include "hashtab.h" | |
53 | #include "command.h" | |
d55e5aa6 | 54 | #include "gdbcmd.h" |
4de283e4 TT |
55 | #include "block.h" |
56 | #include "addrmap.h" | |
57 | #include "typeprint.h" | |
58 | #include "psympriv.h" | |
59 | #include <sys/stat.h> | |
60 | #include "completer.h" | |
268a13a5 | 61 | #include "gdbsupport/vec.h" |
4de283e4 | 62 | #include "c-lang.h" |
d55e5aa6 | 63 | #include "go-lang.h" |
4de283e4 TT |
64 | #include "valprint.h" |
65 | #include "gdbcore.h" /* for gnutarget */ | |
66 | #include "gdb/gdb-index.h" | |
67 | #include <ctype.h> | |
68 | #include "gdb_bfd.h" | |
69 | #include "f-lang.h" | |
70 | #include "source.h" | |
268a13a5 | 71 | #include "gdbsupport/filestuff.h" |
4de283e4 | 72 | #include "build-id.h" |
d55e5aa6 | 73 | #include "namespace.h" |
268a13a5 TT |
74 | #include "gdbsupport/gdb_unlinker.h" |
75 | #include "gdbsupport/function-view.h" | |
76 | #include "gdbsupport/gdb_optional.h" | |
77 | #include "gdbsupport/underlying.h" | |
78 | #include "gdbsupport/byte-vector.h" | |
79 | #include "gdbsupport/hash_enum.h" | |
4de283e4 | 80 | #include "filename-seen-cache.h" |
b32b108a | 81 | #include "producer.h" |
4de283e4 TT |
82 | #include <fcntl.h> |
83 | #include <sys/types.h> | |
84 | #include <algorithm> | |
85 | #include <unordered_set> | |
86 | #include <unordered_map> | |
268a13a5 | 87 | #include "gdbsupport/selftest.h" |
4de283e4 TT |
88 | #include <cmath> |
89 | #include <set> | |
90 | #include <forward_list> | |
c9317f21 | 91 | #include "rust-lang.h" |
268a13a5 | 92 | #include "gdbsupport/pathstuff.h" |
437afbb8 | 93 | |
73be47f5 DE |
94 | /* When == 1, print basic high level tracing messages. |
95 | When > 1, be more verbose. | |
b4f54984 DE |
96 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
97 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 98 | |
d97bc12b | 99 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 100 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 101 | |
27e0867f DE |
102 | /* When non-zero, dump line number entries as they are read in. */ |
103 | static unsigned int dwarf_line_debug = 0; | |
104 | ||
900e11f9 JK |
105 | /* When non-zero, cross-check physname against demangler. */ |
106 | static int check_physname = 0; | |
107 | ||
481860b3 | 108 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 109 | static int use_deprecated_index_sections = 0; |
481860b3 | 110 | |
5bfd760d | 111 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 112 | |
f1e6e072 TT |
113 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
114 | ||
115 | static int dwarf2_locexpr_index; | |
116 | static int dwarf2_loclist_index; | |
117 | static int dwarf2_locexpr_block_index; | |
118 | static int dwarf2_loclist_block_index; | |
119 | ||
3f563c84 PA |
120 | /* An index into a (C++) symbol name component in a symbol name as |
121 | recorded in the mapped_index's symbol table. For each C++ symbol | |
122 | in the symbol table, we record one entry for the start of each | |
123 | component in the symbol in a table of name components, and then | |
124 | sort the table, in order to be able to binary search symbol names, | |
125 | ignoring leading namespaces, both completion and regular look up. | |
126 | For example, for symbol "A::B::C", we'll have an entry that points | |
127 | to "A::B::C", another that points to "B::C", and another for "C". | |
128 | Note that function symbols in GDB index have no parameter | |
129 | information, just the function/method names. You can convert a | |
130 | name_component to a "const char *" using the | |
131 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
132 | ||
133 | struct name_component | |
134 | { | |
135 | /* Offset in the symbol name where the component starts. Stored as | |
136 | a (32-bit) offset instead of a pointer to save memory and improve | |
137 | locality on 64-bit architectures. */ | |
138 | offset_type name_offset; | |
139 | ||
140 | /* The symbol's index in the symbol and constant pool tables of a | |
141 | mapped_index. */ | |
142 | offset_type idx; | |
143 | }; | |
144 | ||
44ed8f3e PA |
145 | /* Base class containing bits shared by both .gdb_index and |
146 | .debug_name indexes. */ | |
147 | ||
148 | struct mapped_index_base | |
149 | { | |
22ca247e TT |
150 | mapped_index_base () = default; |
151 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
152 | ||
44ed8f3e PA |
153 | /* The name_component table (a sorted vector). See name_component's |
154 | description above. */ | |
155 | std::vector<name_component> name_components; | |
156 | ||
157 | /* How NAME_COMPONENTS is sorted. */ | |
158 | enum case_sensitivity name_components_casing; | |
159 | ||
160 | /* Return the number of names in the symbol table. */ | |
161 | virtual size_t symbol_name_count () const = 0; | |
162 | ||
163 | /* Get the name of the symbol at IDX in the symbol table. */ | |
164 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
165 | ||
166 | /* Return whether the name at IDX in the symbol table should be | |
167 | ignored. */ | |
168 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
169 | { | |
170 | return false; | |
171 | } | |
172 | ||
173 | /* Build the symbol name component sorted vector, if we haven't | |
174 | yet. */ | |
175 | void build_name_components (); | |
176 | ||
177 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
178 | possible matches for LN_NO_PARAMS in the name component | |
179 | vector. */ | |
180 | std::pair<std::vector<name_component>::const_iterator, | |
181 | std::vector<name_component>::const_iterator> | |
182 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; | |
183 | ||
184 | /* Prevent deleting/destroying via a base class pointer. */ | |
185 | protected: | |
186 | ~mapped_index_base() = default; | |
187 | }; | |
188 | ||
9291a0cd TT |
189 | /* A description of the mapped index. The file format is described in |
190 | a comment by the code that writes the index. */ | |
fc898b42 | 191 | struct mapped_index final : public mapped_index_base |
9291a0cd | 192 | { |
f00a2de2 PA |
193 | /* A slot/bucket in the symbol table hash. */ |
194 | struct symbol_table_slot | |
195 | { | |
196 | const offset_type name; | |
197 | const offset_type vec; | |
198 | }; | |
199 | ||
559a7a62 | 200 | /* Index data format version. */ |
3063847f | 201 | int version = 0; |
559a7a62 | 202 | |
f00a2de2 PA |
203 | /* The address table data. */ |
204 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 205 | |
3876f04e | 206 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 207 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 208 | |
9291a0cd | 209 | /* A pointer to the constant pool. */ |
3063847f | 210 | const char *constant_pool = nullptr; |
3f563c84 | 211 | |
44ed8f3e PA |
212 | bool symbol_name_slot_invalid (offset_type idx) const override |
213 | { | |
214 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 215 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 216 | } |
5c58de74 | 217 | |
3f563c84 PA |
218 | /* Convenience method to get at the name of the symbol at IDX in the |
219 | symbol table. */ | |
44ed8f3e | 220 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 221 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 222 | |
44ed8f3e PA |
223 | size_t symbol_name_count () const override |
224 | { return this->symbol_table.size (); } | |
9291a0cd TT |
225 | }; |
226 | ||
927aa2e7 JK |
227 | /* A description of the mapped .debug_names. |
228 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 229 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 230 | { |
ed2dc618 SM |
231 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
232 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
233 | {} | |
234 | ||
235 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
236 | bfd_endian dwarf5_byte_order; |
237 | bool dwarf5_is_dwarf64; | |
238 | bool augmentation_is_gdb; | |
239 | uint8_t offset_size; | |
240 | uint32_t cu_count = 0; | |
241 | uint32_t tu_count, bucket_count, name_count; | |
242 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
243 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
244 | const gdb_byte *name_table_string_offs_reordered; | |
245 | const gdb_byte *name_table_entry_offs_reordered; | |
246 | const gdb_byte *entry_pool; | |
247 | ||
248 | struct index_val | |
249 | { | |
250 | ULONGEST dwarf_tag; | |
251 | struct attr | |
252 | { | |
253 | /* Attribute name DW_IDX_*. */ | |
254 | ULONGEST dw_idx; | |
255 | ||
256 | /* Attribute form DW_FORM_*. */ | |
257 | ULONGEST form; | |
258 | ||
259 | /* Value if FORM is DW_FORM_implicit_const. */ | |
260 | LONGEST implicit_const; | |
261 | }; | |
262 | std::vector<attr> attr_vec; | |
263 | }; | |
264 | ||
265 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
266 | ||
267 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
268 | |
269 | /* Implementation of the mapped_index_base virtual interface, for | |
270 | the name_components cache. */ | |
271 | ||
272 | const char *symbol_name_at (offset_type idx) const override | |
273 | { return namei_to_name (idx); } | |
274 | ||
275 | size_t symbol_name_count () const override | |
276 | { return this->name_count; } | |
927aa2e7 JK |
277 | }; |
278 | ||
cd4fb1b2 | 279 | /* See dwarf2read.h. */ |
ed2dc618 | 280 | |
cd4fb1b2 | 281 | dwarf2_per_objfile * |
ed2dc618 SM |
282 | get_dwarf2_per_objfile (struct objfile *objfile) |
283 | { | |
5bfd760d | 284 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 285 | } |
c906108c | 286 | |
251d32d9 | 287 | /* Default names of the debugging sections. */ |
c906108c | 288 | |
233a11ab CS |
289 | /* Note that if the debugging section has been compressed, it might |
290 | have a name like .zdebug_info. */ | |
291 | ||
9cdd5dbd DE |
292 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
293 | { | |
251d32d9 TG |
294 | { ".debug_info", ".zdebug_info" }, |
295 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
296 | { ".debug_line", ".zdebug_line" }, | |
297 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 298 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 299 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 300 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 301 | { ".debug_str", ".zdebug_str" }, |
43988095 | 302 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 303 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 304 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 305 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 306 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
307 | { ".debug_frame", ".zdebug_frame" }, |
308 | { ".eh_frame", NULL }, | |
24d3216f | 309 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
310 | { ".debug_names", ".zdebug_names" }, |
311 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 312 | 23 |
251d32d9 | 313 | }; |
c906108c | 314 | |
80626a55 | 315 | /* List of DWO/DWP sections. */ |
3019eac3 | 316 | |
80626a55 | 317 | static const struct dwop_section_names |
3019eac3 DE |
318 | { |
319 | struct dwarf2_section_names abbrev_dwo; | |
320 | struct dwarf2_section_names info_dwo; | |
321 | struct dwarf2_section_names line_dwo; | |
322 | struct dwarf2_section_names loc_dwo; | |
43988095 | 323 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
324 | struct dwarf2_section_names macinfo_dwo; |
325 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
326 | struct dwarf2_section_names str_dwo; |
327 | struct dwarf2_section_names str_offsets_dwo; | |
328 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
329 | struct dwarf2_section_names cu_index; |
330 | struct dwarf2_section_names tu_index; | |
3019eac3 | 331 | } |
80626a55 | 332 | dwop_section_names = |
3019eac3 DE |
333 | { |
334 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
335 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
336 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
337 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 338 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
339 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
340 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
341 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
342 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
343 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
344 | { ".debug_cu_index", ".zdebug_cu_index" }, |
345 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
346 | }; |
347 | ||
c906108c SS |
348 | /* local data types */ |
349 | ||
107d2387 AC |
350 | /* The data in a compilation unit header, after target2host |
351 | translation, looks like this. */ | |
c906108c | 352 | struct comp_unit_head |
a738430d | 353 | { |
c764a876 | 354 | unsigned int length; |
a738430d | 355 | short version; |
a738430d MK |
356 | unsigned char addr_size; |
357 | unsigned char signed_addr_p; | |
9c541725 | 358 | sect_offset abbrev_sect_off; |
57349743 | 359 | |
a738430d MK |
360 | /* Size of file offsets; either 4 or 8. */ |
361 | unsigned int offset_size; | |
57349743 | 362 | |
a738430d MK |
363 | /* Size of the length field; either 4 or 12. */ |
364 | unsigned int initial_length_size; | |
57349743 | 365 | |
43988095 JK |
366 | enum dwarf_unit_type unit_type; |
367 | ||
a738430d MK |
368 | /* Offset to the first byte of this compilation unit header in the |
369 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 370 | sect_offset sect_off; |
57349743 | 371 | |
d00adf39 DE |
372 | /* Offset to first die in this cu from the start of the cu. |
373 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 374 | cu_offset first_die_cu_offset; |
43988095 | 375 | |
a084a2a6 AT |
376 | |
377 | /* 64-bit signature of this unit. For type units, it denotes the signature of | |
378 | the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5). | |
379 | Also used in DWARF 5, to denote the dwo id when the unit type is | |
380 | DW_UT_skeleton or DW_UT_split_compile. */ | |
43988095 JK |
381 | ULONGEST signature; |
382 | ||
383 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 384 | cu_offset type_cu_offset_in_tu; |
a738430d | 385 | }; |
c906108c | 386 | |
3da10d80 KS |
387 | /* Type used for delaying computation of method physnames. |
388 | See comments for compute_delayed_physnames. */ | |
389 | struct delayed_method_info | |
390 | { | |
391 | /* The type to which the method is attached, i.e., its parent class. */ | |
392 | struct type *type; | |
393 | ||
394 | /* The index of the method in the type's function fieldlists. */ | |
395 | int fnfield_index; | |
396 | ||
397 | /* The index of the method in the fieldlist. */ | |
398 | int index; | |
399 | ||
400 | /* The name of the DIE. */ | |
401 | const char *name; | |
402 | ||
403 | /* The DIE associated with this method. */ | |
404 | struct die_info *die; | |
405 | }; | |
406 | ||
e7c27a73 DJ |
407 | /* Internal state when decoding a particular compilation unit. */ |
408 | struct dwarf2_cu | |
409 | { | |
fcd3b13d SM |
410 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
411 | ~dwarf2_cu (); | |
412 | ||
413 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
414 | ||
c24bdb02 KS |
415 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
416 | Create the set of symtabs used by this TU, or if this TU is sharing | |
417 | symtabs with another TU and the symtabs have already been created | |
418 | then restore those symtabs in the line header. | |
419 | We don't need the pc/line-number mapping for type units. */ | |
420 | void setup_type_unit_groups (struct die_info *die); | |
421 | ||
422 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
423 | buildsym_compunit constructor. */ | |
424 | struct compunit_symtab *start_symtab (const char *name, | |
425 | const char *comp_dir, | |
426 | CORE_ADDR low_pc); | |
427 | ||
428 | /* Reset the builder. */ | |
429 | void reset_builder () { m_builder.reset (); } | |
430 | ||
d00adf39 | 431 | /* The header of the compilation unit. */ |
fcd3b13d | 432 | struct comp_unit_head header {}; |
e142c38c | 433 | |
d00adf39 | 434 | /* Base address of this compilation unit. */ |
fcd3b13d | 435 | CORE_ADDR base_address = 0; |
d00adf39 DE |
436 | |
437 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 438 | int base_known = 0; |
d00adf39 | 439 | |
e142c38c | 440 | /* The language we are debugging. */ |
fcd3b13d SM |
441 | enum language language = language_unknown; |
442 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 443 | |
fcd3b13d | 444 | const char *producer = nullptr; |
b0f35d58 | 445 | |
c24bdb02 | 446 | private: |
804d2729 TT |
447 | /* The symtab builder for this CU. This is only non-NULL when full |
448 | symbols are being read. */ | |
c24bdb02 | 449 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 450 | |
c24bdb02 | 451 | public: |
e142c38c DJ |
452 | /* The generic symbol table building routines have separate lists for |
453 | file scope symbols and all all other scopes (local scopes). So | |
454 | we need to select the right one to pass to add_symbol_to_list(). | |
455 | We do it by keeping a pointer to the correct list in list_in_scope. | |
456 | ||
457 | FIXME: The original dwarf code just treated the file scope as the | |
458 | first local scope, and all other local scopes as nested local | |
459 | scopes, and worked fine. Check to see if we really need to | |
460 | distinguish these in buildsym.c. */ | |
fcd3b13d | 461 | struct pending **list_in_scope = nullptr; |
e142c38c | 462 | |
b64f50a1 JK |
463 | /* Hash table holding all the loaded partial DIEs |
464 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 465 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
466 | |
467 | /* Storage for things with the same lifetime as this read-in compilation | |
468 | unit, including partial DIEs. */ | |
fcd3b13d | 469 | auto_obstack comp_unit_obstack; |
72bf9492 | 470 | |
ae038cb0 DJ |
471 | /* When multiple dwarf2_cu structures are living in memory, this field |
472 | chains them all together, so that they can be released efficiently. | |
473 | We will probably also want a generation counter so that most-recently-used | |
474 | compilation units are cached... */ | |
fcd3b13d | 475 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 476 | |
69d751e3 | 477 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
478 | struct dwarf2_per_cu_data *per_cu; |
479 | ||
480 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 481 | int last_used = 0; |
ae038cb0 | 482 | |
b64f50a1 JK |
483 | /* A hash table of DIE cu_offset for following references with |
484 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 485 | htab_t die_hash = nullptr; |
10b3939b DJ |
486 | |
487 | /* Full DIEs if read in. */ | |
fcd3b13d | 488 | struct die_info *dies = nullptr; |
10b3939b DJ |
489 | |
490 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
491 | units referenced by this one. Only set during full symbol processing; | |
492 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 493 | htab_t dependencies = nullptr; |
10b3939b | 494 | |
cb1df416 | 495 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 496 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
497 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
498 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
499 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
500 | to the line header as long as this DIE is being processed. See | |
501 | process_die_scope. */ | |
fcd3b13d | 502 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 503 | |
3da10d80 KS |
504 | /* A list of methods which need to have physnames computed |
505 | after all type information has been read. */ | |
c89b44cd | 506 | std::vector<delayed_method_info> method_list; |
3da10d80 | 507 | |
96408a79 | 508 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 509 | htab_t call_site_htab = nullptr; |
96408a79 | 510 | |
034e5797 DE |
511 | /* Non-NULL if this CU came from a DWO file. |
512 | There is an invariant here that is important to remember: | |
513 | Except for attributes copied from the top level DIE in the "main" | |
514 | (or "stub") file in preparation for reading the DWO file | |
515 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
516 | Either there isn't a DWO file (in which case this is NULL and the point | |
517 | is moot), or there is and either we're not going to read it (in which | |
518 | case this is NULL) or there is and we are reading it (in which case this | |
519 | is non-NULL). */ | |
fcd3b13d | 520 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 DE |
521 | |
522 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
523 | (zero is a valid value though). | |
1dbab08b | 524 | Note this value comes from the Fission stub CU/TU's DIE. */ |
fcd3b13d | 525 | ULONGEST addr_base = 0; |
3019eac3 | 526 | |
2e3cf129 DE |
527 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
528 | (zero is a valid value though). | |
1dbab08b | 529 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 530 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
531 | be used without needing to know whether DWO files are in use or not. |
532 | N.B. This does not apply to DW_AT_ranges appearing in | |
533 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
534 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
535 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
536 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
fcd3b13d | 537 | ULONGEST ranges_base = 0; |
2e3cf129 | 538 | |
c9317f21 TT |
539 | /* When reading debug info generated by older versions of rustc, we |
540 | have to rewrite some union types to be struct types with a | |
541 | variant part. This rewriting must be done after the CU is fully | |
542 | read in, because otherwise at the point of rewriting some struct | |
543 | type might not have been fully processed. So, we keep a list of | |
544 | all such types here and process them after expansion. */ | |
545 | std::vector<struct type *> rust_unions; | |
546 | ||
ae038cb0 | 547 | /* Mark used when releasing cached dies. */ |
9068261f | 548 | bool mark : 1; |
ae038cb0 | 549 | |
8be455d7 JK |
550 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
551 | This test is imperfect as there may exist optimized debug code not using | |
552 | any location list and still facing inlining issues if handled as | |
553 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 554 | bool has_loclist : 1; |
ba919b58 | 555 | |
9068261f | 556 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
557 | if all the producer_is_* fields are valid. This information is cached |
558 | because profiling CU expansion showed excessive time spent in | |
559 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
560 | bool checked_producer : 1; |
561 | bool producer_is_gxx_lt_4_6 : 1; | |
562 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 563 | bool producer_is_icc : 1; |
9068261f | 564 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 565 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 566 | |
9068261f | 567 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
568 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
569 | this information, but later versions do. */ | |
570 | ||
9068261f | 571 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
572 | |
573 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
574 | |
575 | /* If this CU was inherited by another CU (via specification, | |
576 | abstract_origin, etc), this is the ancestor CU. */ | |
577 | dwarf2_cu *ancestor; | |
578 | ||
579 | /* Get the buildsym_compunit for this CU. */ | |
580 | buildsym_compunit *get_builder () | |
581 | { | |
582 | /* If this CU has a builder associated with it, use that. */ | |
583 | if (m_builder != nullptr) | |
584 | return m_builder.get (); | |
585 | ||
586 | /* Otherwise, search ancestors for a valid builder. */ | |
587 | if (ancestor != nullptr) | |
588 | return ancestor->get_builder (); | |
589 | ||
590 | return nullptr; | |
591 | } | |
e7c27a73 DJ |
592 | }; |
593 | ||
094b34ac DE |
594 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
595 | This includes type_unit_group and quick_file_names. */ | |
596 | ||
597 | struct stmt_list_hash | |
598 | { | |
599 | /* The DWO unit this table is from or NULL if there is none. */ | |
600 | struct dwo_unit *dwo_unit; | |
601 | ||
602 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 603 | sect_offset line_sect_off; |
094b34ac DE |
604 | }; |
605 | ||
f4dc4d17 DE |
606 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
607 | an object of this type. */ | |
608 | ||
609 | struct type_unit_group | |
610 | { | |
0186c6a7 | 611 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
612 | To simplify things we create an artificial CU that "includes" all the |
613 | type units using this stmt_list so that the rest of the code still has | |
614 | a "per_cu" handle on the symtab. | |
615 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 616 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
617 | struct dwarf2_per_cu_data per_cu; |
618 | ||
0186c6a7 DE |
619 | /* The TUs that share this DW_AT_stmt_list entry. |
620 | This is added to while parsing type units to build partial symtabs, | |
621 | and is deleted afterwards and not used again. */ | |
622 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 | 623 | |
43f3e411 | 624 | /* The compunit symtab. |
094b34ac | 625 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
626 | so we create an essentially anonymous symtab as the compunit symtab. */ |
627 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 628 | |
094b34ac DE |
629 | /* The data used to construct the hash key. */ |
630 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
631 | |
632 | /* The number of symtabs from the line header. | |
633 | The value here must match line_header.num_file_names. */ | |
634 | unsigned int num_symtabs; | |
635 | ||
636 | /* The symbol tables for this TU (obtained from the files listed in | |
637 | DW_AT_stmt_list). | |
638 | WARNING: The order of entries here must match the order of entries | |
639 | in the line header. After the first TU using this type_unit_group, the | |
640 | line header for the subsequent TUs is recreated from this. This is done | |
641 | because we need to use the same symtabs for each TU using the same | |
642 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
643 | there's no guarantee the line header doesn't have duplicate entries. */ | |
644 | struct symtab **symtabs; | |
645 | }; | |
646 | ||
73869dc2 | 647 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
648 | |
649 | struct dwo_sections | |
650 | { | |
651 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
652 | struct dwarf2_section_info line; |
653 | struct dwarf2_section_info loc; | |
43988095 | 654 | struct dwarf2_section_info loclists; |
09262596 DE |
655 | struct dwarf2_section_info macinfo; |
656 | struct dwarf2_section_info macro; | |
3019eac3 DE |
657 | struct dwarf2_section_info str; |
658 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
659 | /* In the case of a virtual DWO file, these two are unused. */ |
660 | struct dwarf2_section_info info; | |
fd5866f6 | 661 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
662 | }; |
663 | ||
c88ee1f0 | 664 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
665 | |
666 | struct dwo_unit | |
667 | { | |
668 | /* Backlink to the containing struct dwo_file. */ | |
669 | struct dwo_file *dwo_file; | |
670 | ||
671 | /* The "id" that distinguishes this CU/TU. | |
672 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
673 | Since signatures came first, we stick with it for consistency. */ | |
674 | ULONGEST signature; | |
675 | ||
676 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 677 | struct dwarf2_section_info *section; |
3019eac3 | 678 | |
9c541725 PA |
679 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
680 | sect_offset sect_off; | |
3019eac3 DE |
681 | unsigned int length; |
682 | ||
683 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
684 | cu_offset type_offset_in_tu; | |
685 | }; | |
686 | ||
73869dc2 DE |
687 | /* include/dwarf2.h defines the DWP section codes. |
688 | It defines a max value but it doesn't define a min value, which we | |
689 | use for error checking, so provide one. */ | |
690 | ||
691 | enum dwp_v2_section_ids | |
692 | { | |
693 | DW_SECT_MIN = 1 | |
694 | }; | |
695 | ||
80626a55 | 696 | /* Data for one DWO file. |
57d63ce2 DE |
697 | |
698 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
699 | appears in a DWP file). DWP files don't really have DWO files per se - | |
700 | comdat folding of types "loses" the DWO file they came from, and from | |
701 | a high level view DWP files appear to contain a mass of random types. | |
702 | However, to maintain consistency with the non-DWP case we pretend DWP | |
703 | files contain virtual DWO files, and we assign each TU with one virtual | |
704 | DWO file (generally based on the line and abbrev section offsets - | |
705 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
706 | |
707 | struct dwo_file | |
708 | { | |
51ac9db5 SM |
709 | dwo_file () = default; |
710 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
711 | ||
0ac5b59e | 712 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
713 | For virtual DWO files the name is constructed from the section offsets |
714 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
715 | from related CU+TUs. */ | |
51ac9db5 | 716 | const char *dwo_name = nullptr; |
0ac5b59e DE |
717 | |
718 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 719 | const char *comp_dir = nullptr; |
3019eac3 | 720 | |
80626a55 DE |
721 | /* The bfd, when the file is open. Otherwise this is NULL. |
722 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 723 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 724 | |
73869dc2 DE |
725 | /* The sections that make up this DWO file. |
726 | Remember that for virtual DWO files in DWP V2, these are virtual | |
727 | sections (for lack of a better name). */ | |
51ac9db5 | 728 | struct dwo_sections sections {}; |
3019eac3 | 729 | |
33c5cd75 DB |
730 | /* The CUs in the file. |
731 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
732 | an extension to handle LLVM's Link Time Optimization output (where | |
733 | multiple source files may be compiled into a single object/dwo pair). */ | |
51ac9db5 | 734 | htab_t cus {}; |
3019eac3 DE |
735 | |
736 | /* Table of TUs in the file. | |
737 | Each element is a struct dwo_unit. */ | |
51ac9db5 | 738 | htab_t tus {}; |
3019eac3 DE |
739 | }; |
740 | ||
80626a55 DE |
741 | /* These sections are what may appear in a DWP file. */ |
742 | ||
743 | struct dwp_sections | |
744 | { | |
73869dc2 | 745 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
746 | struct dwarf2_section_info str; |
747 | struct dwarf2_section_info cu_index; | |
748 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
749 | |
750 | /* These are only used by DWP version 2 files. | |
751 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
752 | sections are referenced by section number, and are not recorded here. | |
753 | In DWP version 2 there is at most one copy of all these sections, each | |
754 | section being (effectively) comprised of the concatenation of all of the | |
755 | individual sections that exist in the version 1 format. | |
756 | To keep the code simple we treat each of these concatenated pieces as a | |
757 | section itself (a virtual section?). */ | |
758 | struct dwarf2_section_info abbrev; | |
759 | struct dwarf2_section_info info; | |
760 | struct dwarf2_section_info line; | |
761 | struct dwarf2_section_info loc; | |
762 | struct dwarf2_section_info macinfo; | |
763 | struct dwarf2_section_info macro; | |
764 | struct dwarf2_section_info str_offsets; | |
765 | struct dwarf2_section_info types; | |
80626a55 DE |
766 | }; |
767 | ||
73869dc2 DE |
768 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
769 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 770 | |
73869dc2 | 771 | struct virtual_v1_dwo_sections |
80626a55 DE |
772 | { |
773 | struct dwarf2_section_info abbrev; | |
774 | struct dwarf2_section_info line; | |
775 | struct dwarf2_section_info loc; | |
776 | struct dwarf2_section_info macinfo; | |
777 | struct dwarf2_section_info macro; | |
778 | struct dwarf2_section_info str_offsets; | |
779 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 780 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
781 | struct dwarf2_section_info info_or_types; |
782 | }; | |
783 | ||
73869dc2 DE |
784 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
785 | In version 2, the sections of the DWO files are concatenated together | |
786 | and stored in one section of that name. Thus each ELF section contains | |
787 | several "virtual" sections. */ | |
788 | ||
789 | struct virtual_v2_dwo_sections | |
790 | { | |
791 | bfd_size_type abbrev_offset; | |
792 | bfd_size_type abbrev_size; | |
793 | ||
794 | bfd_size_type line_offset; | |
795 | bfd_size_type line_size; | |
796 | ||
797 | bfd_size_type loc_offset; | |
798 | bfd_size_type loc_size; | |
799 | ||
800 | bfd_size_type macinfo_offset; | |
801 | bfd_size_type macinfo_size; | |
802 | ||
803 | bfd_size_type macro_offset; | |
804 | bfd_size_type macro_size; | |
805 | ||
806 | bfd_size_type str_offsets_offset; | |
807 | bfd_size_type str_offsets_size; | |
808 | ||
809 | /* Each DWP hash table entry records one CU or one TU. | |
810 | That is recorded here, and copied to dwo_unit.section. */ | |
811 | bfd_size_type info_or_types_offset; | |
812 | bfd_size_type info_or_types_size; | |
813 | }; | |
814 | ||
80626a55 DE |
815 | /* Contents of DWP hash tables. */ |
816 | ||
817 | struct dwp_hash_table | |
818 | { | |
73869dc2 | 819 | uint32_t version, nr_columns; |
80626a55 | 820 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
821 | const gdb_byte *hash_table, *unit_table; |
822 | union | |
823 | { | |
824 | struct | |
825 | { | |
826 | const gdb_byte *indices; | |
827 | } v1; | |
828 | struct | |
829 | { | |
830 | /* This is indexed by column number and gives the id of the section | |
831 | in that column. */ | |
832 | #define MAX_NR_V2_DWO_SECTIONS \ | |
833 | (1 /* .debug_info or .debug_types */ \ | |
834 | + 1 /* .debug_abbrev */ \ | |
835 | + 1 /* .debug_line */ \ | |
836 | + 1 /* .debug_loc */ \ | |
837 | + 1 /* .debug_str_offsets */ \ | |
838 | + 1 /* .debug_macro or .debug_macinfo */) | |
839 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
840 | const gdb_byte *offsets; | |
841 | const gdb_byte *sizes; | |
842 | } v2; | |
843 | } section_pool; | |
80626a55 DE |
844 | }; |
845 | ||
846 | /* Data for one DWP file. */ | |
847 | ||
848 | struct dwp_file | |
849 | { | |
400174b1 TT |
850 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
851 | : name (name_), | |
852 | dbfd (std::move (abfd)) | |
853 | { | |
854 | } | |
855 | ||
80626a55 DE |
856 | /* Name of the file. */ |
857 | const char *name; | |
858 | ||
73869dc2 | 859 | /* File format version. */ |
400174b1 | 860 | int version = 0; |
73869dc2 | 861 | |
93417882 | 862 | /* The bfd. */ |
400174b1 | 863 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
864 | |
865 | /* Section info for this file. */ | |
400174b1 | 866 | struct dwp_sections sections {}; |
80626a55 | 867 | |
57d63ce2 | 868 | /* Table of CUs in the file. */ |
400174b1 | 869 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
870 | |
871 | /* Table of TUs in the file. */ | |
400174b1 | 872 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 873 | |
19ac8c2e | 874 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
400174b1 TT |
875 | htab_t loaded_cus {}; |
876 | htab_t loaded_tus {}; | |
80626a55 | 877 | |
73869dc2 DE |
878 | /* Table to map ELF section numbers to their sections. |
879 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
880 | unsigned int num_sections = 0; |
881 | asection **elf_sections = nullptr; | |
80626a55 DE |
882 | }; |
883 | ||
0963b4bd MS |
884 | /* Struct used to pass misc. parameters to read_die_and_children, et |
885 | al. which are used for both .debug_info and .debug_types dies. | |
886 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 887 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
888 | |
889 | struct die_reader_specs | |
890 | { | |
a32a8923 | 891 | /* The bfd of die_section. */ |
93311388 DE |
892 | bfd* abfd; |
893 | ||
894 | /* The CU of the DIE we are parsing. */ | |
895 | struct dwarf2_cu *cu; | |
896 | ||
80626a55 | 897 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
898 | struct dwo_file *dwo_file; |
899 | ||
dee91e82 | 900 | /* The section the die comes from. |
3019eac3 | 901 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
902 | struct dwarf2_section_info *die_section; |
903 | ||
904 | /* die_section->buffer. */ | |
d521ce57 | 905 | const gdb_byte *buffer; |
f664829e DE |
906 | |
907 | /* The end of the buffer. */ | |
908 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
909 | |
910 | /* The value of the DW_AT_comp_dir attribute. */ | |
911 | const char *comp_dir; | |
685af9cd TT |
912 | |
913 | /* The abbreviation table to use when reading the DIEs. */ | |
914 | struct abbrev_table *abbrev_table; | |
93311388 DE |
915 | }; |
916 | ||
fd820528 | 917 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 918 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 919 | const gdb_byte *info_ptr, |
dee91e82 DE |
920 | struct die_info *comp_unit_die, |
921 | int has_children, | |
922 | void *data); | |
923 | ||
ecfb656c PA |
924 | /* A 1-based directory index. This is a strong typedef to prevent |
925 | accidentally using a directory index as a 0-based index into an | |
926 | array/vector. */ | |
927 | enum class dir_index : unsigned int {}; | |
928 | ||
929 | /* Likewise, a 1-based file name index. */ | |
930 | enum class file_name_index : unsigned int {}; | |
931 | ||
52059ffd TT |
932 | struct file_entry |
933 | { | |
fff8551c PA |
934 | file_entry () = default; |
935 | ||
ecfb656c | 936 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
937 | unsigned int mod_time_, unsigned int length_) |
938 | : name (name_), | |
ecfb656c | 939 | d_index (d_index_), |
fff8551c PA |
940 | mod_time (mod_time_), |
941 | length (length_) | |
942 | {} | |
943 | ||
ecfb656c PA |
944 | /* Return the include directory at D_INDEX stored in LH. Returns |
945 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
946 | const char *include_dir (const line_header *lh) const; |
947 | ||
fff8551c PA |
948 | /* The file name. Note this is an observing pointer. The memory is |
949 | owned by debug_line_buffer. */ | |
950 | const char *name {}; | |
951 | ||
8c43009f | 952 | /* The directory index (1-based). */ |
ecfb656c | 953 | dir_index d_index {}; |
fff8551c PA |
954 | |
955 | unsigned int mod_time {}; | |
956 | ||
957 | unsigned int length {}; | |
958 | ||
959 | /* True if referenced by the Line Number Program. */ | |
960 | bool included_p {}; | |
961 | ||
83769d0b | 962 | /* The associated symbol table, if any. */ |
fff8551c | 963 | struct symtab *symtab {}; |
52059ffd TT |
964 | }; |
965 | ||
debd256d JB |
966 | /* The line number information for a compilation unit (found in the |
967 | .debug_line section) begins with a "statement program header", | |
968 | which contains the following information. */ | |
969 | struct line_header | |
970 | { | |
fff8551c PA |
971 | line_header () |
972 | : offset_in_dwz {} | |
973 | {} | |
974 | ||
975 | /* Add an entry to the include directory table. */ | |
976 | void add_include_dir (const char *include_dir); | |
977 | ||
978 | /* Add an entry to the file name table. */ | |
ecfb656c | 979 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
980 | unsigned int mod_time, unsigned int length); |
981 | ||
ecfb656c | 982 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 983 | is out of bounds. */ |
ecfb656c | 984 | const char *include_dir_at (dir_index index) const |
8c43009f | 985 | { |
ecfb656c PA |
986 | /* Convert directory index number (1-based) to vector index |
987 | (0-based). */ | |
988 | size_t vec_index = to_underlying (index) - 1; | |
989 | ||
990 | if (vec_index >= include_dirs.size ()) | |
8c43009f | 991 | return NULL; |
ecfb656c | 992 | return include_dirs[vec_index]; |
8c43009f PA |
993 | } |
994 | ||
ecfb656c | 995 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
8c43009f | 996 | is out of bounds. */ |
ecfb656c | 997 | file_entry *file_name_at (file_name_index index) |
8c43009f | 998 | { |
ecfb656c PA |
999 | /* Convert file name index number (1-based) to vector index |
1000 | (0-based). */ | |
1001 | size_t vec_index = to_underlying (index) - 1; | |
1002 | ||
1003 | if (vec_index >= file_names.size ()) | |
fff8551c | 1004 | return NULL; |
ecfb656c | 1005 | return &file_names[vec_index]; |
fff8551c PA |
1006 | } |
1007 | ||
527f3840 | 1008 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1009 | sect_offset sect_off {}; |
527f3840 JK |
1010 | |
1011 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1012 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1013 | ||
1014 | unsigned int total_length {}; | |
1015 | unsigned short version {}; | |
1016 | unsigned int header_length {}; | |
1017 | unsigned char minimum_instruction_length {}; | |
1018 | unsigned char maximum_ops_per_instruction {}; | |
1019 | unsigned char default_is_stmt {}; | |
1020 | int line_base {}; | |
1021 | unsigned char line_range {}; | |
1022 | unsigned char opcode_base {}; | |
debd256d JB |
1023 | |
1024 | /* standard_opcode_lengths[i] is the number of operands for the | |
1025 | standard opcode whose value is i. This means that | |
1026 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1027 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1028 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1029 | |
fff8551c PA |
1030 | /* The include_directories table. Note these are observing |
1031 | pointers. The memory is owned by debug_line_buffer. */ | |
1032 | std::vector<const char *> include_dirs; | |
debd256d | 1033 | |
fff8551c PA |
1034 | /* The file_names table. */ |
1035 | std::vector<file_entry> file_names; | |
debd256d JB |
1036 | |
1037 | /* The start and end of the statement program following this | |
6502dd73 | 1038 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1039 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
debd256d | 1040 | }; |
c906108c | 1041 | |
fff8551c PA |
1042 | typedef std::unique_ptr<line_header> line_header_up; |
1043 | ||
8c43009f PA |
1044 | const char * |
1045 | file_entry::include_dir (const line_header *lh) const | |
1046 | { | |
ecfb656c | 1047 | return lh->include_dir_at (d_index); |
8c43009f PA |
1048 | } |
1049 | ||
c906108c | 1050 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1051 | need this much information. */ |
6f06d47b | 1052 | struct partial_die_info : public allocate_on_obstack |
c906108c | 1053 | { |
6f06d47b YQ |
1054 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
1055 | ||
1056 | /* Disable assign but still keep copy ctor, which is needed | |
1057 | load_partial_dies. */ | |
1058 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
1059 | ||
52356b79 YQ |
1060 | /* Adjust the partial die before generating a symbol for it. This |
1061 | function may set the is_external flag or change the DIE's | |
1062 | name. */ | |
1063 | void fixup (struct dwarf2_cu *cu); | |
1064 | ||
48fbe735 YQ |
1065 | /* Read a minimal amount of information into the minimal die |
1066 | structure. */ | |
1067 | const gdb_byte *read (const struct die_reader_specs *reader, | |
1068 | const struct abbrev_info &abbrev, | |
1069 | const gdb_byte *info_ptr); | |
1070 | ||
72bf9492 | 1071 | /* Offset of this DIE. */ |
6f06d47b | 1072 | const sect_offset sect_off; |
72bf9492 DJ |
1073 | |
1074 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 1075 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 1076 | |
72bf9492 | 1077 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
1078 | const unsigned int has_children : 1; |
1079 | ||
72bf9492 DJ |
1080 | unsigned int is_external : 1; |
1081 | unsigned int is_declaration : 1; | |
1082 | unsigned int has_type : 1; | |
1083 | unsigned int has_specification : 1; | |
1084 | unsigned int has_pc_info : 1; | |
481860b3 | 1085 | unsigned int may_be_inlined : 1; |
72bf9492 | 1086 | |
0c1b455e TT |
1087 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1088 | unsigned int main_subprogram : 1; | |
1089 | ||
72bf9492 DJ |
1090 | /* Flag set if the SCOPE field of this structure has been |
1091 | computed. */ | |
1092 | unsigned int scope_set : 1; | |
1093 | ||
fa4028e9 JB |
1094 | /* Flag set if the DIE has a byte_size attribute. */ |
1095 | unsigned int has_byte_size : 1; | |
1096 | ||
ff908ebf AW |
1097 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1098 | unsigned int has_const_value : 1; | |
1099 | ||
98bfdba5 PA |
1100 | /* Flag set if any of the DIE's children are template arguments. */ |
1101 | unsigned int has_template_arguments : 1; | |
1102 | ||
52356b79 | 1103 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
1104 | unsigned int fixup_called : 1; |
1105 | ||
36586728 TT |
1106 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1107 | unsigned int is_dwz : 1; | |
1108 | ||
1109 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1110 | unsigned int spec_is_dwz : 1; | |
1111 | ||
72bf9492 | 1112 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1113 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 1114 | const char *name = nullptr; |
72bf9492 | 1115 | |
abc72ce4 | 1116 | /* The linkage name, if present. */ |
6f06d47b | 1117 | const char *linkage_name = nullptr; |
abc72ce4 | 1118 | |
72bf9492 DJ |
1119 | /* The scope to prepend to our children. This is generally |
1120 | allocated on the comp_unit_obstack, so will disappear | |
1121 | when this compilation unit leaves the cache. */ | |
6f06d47b | 1122 | const char *scope = nullptr; |
72bf9492 | 1123 | |
95554aad TT |
1124 | /* Some data associated with the partial DIE. The tag determines |
1125 | which field is live. */ | |
1126 | union | |
1127 | { | |
1128 | /* The location description associated with this DIE, if any. */ | |
1129 | struct dwarf_block *locdesc; | |
1130 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1131 | sect_offset sect_off; |
6f06d47b | 1132 | } d {}; |
72bf9492 DJ |
1133 | |
1134 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
1135 | CORE_ADDR lowpc = 0; |
1136 | CORE_ADDR highpc = 0; | |
72bf9492 | 1137 | |
93311388 | 1138 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1139 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1140 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1141 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1142 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1143 | |
1144 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1145 | DW_AT_specification (or DW_AT_abstract_origin or | |
1146 | DW_AT_extension). */ | |
6f06d47b | 1147 | sect_offset spec_offset {}; |
72bf9492 DJ |
1148 | |
1149 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1150 | if any. */ | |
6f06d47b YQ |
1151 | struct partial_die_info *die_parent = nullptr; |
1152 | struct partial_die_info *die_child = nullptr; | |
1153 | struct partial_die_info *die_sibling = nullptr; | |
1154 | ||
1155 | friend struct partial_die_info * | |
1156 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1157 | ||
1158 | private: | |
1159 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1160 | partial_die_info (sect_offset sect_off) | |
1161 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1162 | { | |
1163 | } | |
1164 | ||
1165 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1166 | int has_children_) | |
1167 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1168 | { | |
1169 | is_external = 0; | |
1170 | is_declaration = 0; | |
1171 | has_type = 0; | |
1172 | has_specification = 0; | |
1173 | has_pc_info = 0; | |
1174 | may_be_inlined = 0; | |
1175 | main_subprogram = 0; | |
1176 | scope_set = 0; | |
1177 | has_byte_size = 0; | |
1178 | has_const_value = 0; | |
1179 | has_template_arguments = 0; | |
1180 | fixup_called = 0; | |
1181 | is_dwz = 0; | |
1182 | spec_is_dwz = 0; | |
1183 | } | |
c906108c SS |
1184 | }; |
1185 | ||
0963b4bd | 1186 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1187 | struct abbrev_info |
1188 | { | |
1189 | unsigned int number; /* number identifying abbrev */ | |
1190 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1191 | unsigned short has_children; /* boolean */ |
1192 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1193 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1194 | struct abbrev_info *next; /* next in chain */ | |
1195 | }; | |
1196 | ||
1197 | struct attr_abbrev | |
1198 | { | |
9d25dd43 DE |
1199 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1200 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1201 | |
1202 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1203 | LONGEST implicit_const; | |
c906108c SS |
1204 | }; |
1205 | ||
433df2d4 DE |
1206 | /* Size of abbrev_table.abbrev_hash_table. */ |
1207 | #define ABBREV_HASH_SIZE 121 | |
1208 | ||
1209 | /* Top level data structure to contain an abbreviation table. */ | |
1210 | ||
1211 | struct abbrev_table | |
1212 | { | |
685af9cd TT |
1213 | explicit abbrev_table (sect_offset off) |
1214 | : sect_off (off) | |
1215 | { | |
4a17f768 | 1216 | m_abbrevs = |
685af9cd | 1217 | XOBNEWVEC (&abbrev_obstack, struct abbrev_info *, ABBREV_HASH_SIZE); |
4a17f768 | 1218 | memset (m_abbrevs, 0, ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); |
685af9cd TT |
1219 | } |
1220 | ||
1221 | DISABLE_COPY_AND_ASSIGN (abbrev_table); | |
1222 | ||
1223 | /* Allocate space for a struct abbrev_info object in | |
1224 | ABBREV_TABLE. */ | |
1225 | struct abbrev_info *alloc_abbrev (); | |
1226 | ||
1227 | /* Add an abbreviation to the table. */ | |
1228 | void add_abbrev (unsigned int abbrev_number, struct abbrev_info *abbrev); | |
1229 | ||
1230 | /* Look up an abbrev in the table. | |
1231 | Returns NULL if the abbrev is not found. */ | |
1232 | ||
1233 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number); | |
1234 | ||
1235 | ||
f4dc4d17 DE |
1236 | /* Where the abbrev table came from. |
1237 | This is used as a sanity check when the table is used. */ | |
685af9cd | 1238 | const sect_offset sect_off; |
433df2d4 DE |
1239 | |
1240 | /* Storage for the abbrev table. */ | |
685af9cd | 1241 | auto_obstack abbrev_obstack; |
433df2d4 | 1242 | |
4a17f768 YQ |
1243 | private: |
1244 | ||
433df2d4 DE |
1245 | /* Hash table of abbrevs. |
1246 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1247 | It could be statically allocated, but the previous code didn't so we | |
1248 | don't either. */ | |
4a17f768 | 1249 | struct abbrev_info **m_abbrevs; |
433df2d4 DE |
1250 | }; |
1251 | ||
685af9cd TT |
1252 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
1253 | ||
0963b4bd | 1254 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1255 | struct attribute |
1256 | { | |
9d25dd43 | 1257 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1258 | ENUM_BITFIELD(dwarf_form) form : 15; |
1259 | ||
1260 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1261 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1262 | here for better struct attribute alignment. */ | |
1263 | unsigned int string_is_canonical : 1; | |
1264 | ||
b60c80d6 DJ |
1265 | union |
1266 | { | |
15d034d0 | 1267 | const char *str; |
b60c80d6 | 1268 | struct dwarf_block *blk; |
43bbcdc2 PH |
1269 | ULONGEST unsnd; |
1270 | LONGEST snd; | |
b60c80d6 | 1271 | CORE_ADDR addr; |
ac9ec31b | 1272 | ULONGEST signature; |
b60c80d6 DJ |
1273 | } |
1274 | u; | |
1275 | }; | |
1276 | ||
0963b4bd | 1277 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1278 | struct die_info |
1279 | { | |
76815b17 DE |
1280 | /* DWARF-2 tag for this DIE. */ |
1281 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1282 | ||
1283 | /* Number of attributes */ | |
98bfdba5 PA |
1284 | unsigned char num_attrs; |
1285 | ||
1286 | /* True if we're presently building the full type name for the | |
1287 | type derived from this DIE. */ | |
1288 | unsigned char building_fullname : 1; | |
76815b17 | 1289 | |
adde2bff DE |
1290 | /* True if this die is in process. PR 16581. */ |
1291 | unsigned char in_process : 1; | |
1292 | ||
76815b17 DE |
1293 | /* Abbrev number */ |
1294 | unsigned int abbrev; | |
1295 | ||
93311388 | 1296 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1297 | sect_offset sect_off; |
78ba4af6 JB |
1298 | |
1299 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1300 | points to this die's parent; CHILD points to the first child of | |
1301 | this node; and all the children of a given node are chained | |
4950bc1c | 1302 | together via their SIBLING fields. */ |
639d11d3 DC |
1303 | struct die_info *child; /* Its first child, if any. */ |
1304 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1305 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1306 | |
b60c80d6 DJ |
1307 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1308 | zero, but it's not common and zero-sized arrays are not | |
1309 | sufficiently portable C. */ | |
1310 | struct attribute attrs[1]; | |
c906108c SS |
1311 | }; |
1312 | ||
0963b4bd | 1313 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1314 | |
1315 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1316 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1317 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1318 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1319 | #define DW_SND(attr) ((attr)->u.snd) | |
1320 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1321 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1322 | |
0963b4bd | 1323 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1324 | struct dwarf_block |
1325 | { | |
56eb65bd | 1326 | size_t size; |
1d6edc3c JK |
1327 | |
1328 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1329 | const gdb_byte *data; |
c906108c SS |
1330 | }; |
1331 | ||
c906108c SS |
1332 | #ifndef ATTR_ALLOC_CHUNK |
1333 | #define ATTR_ALLOC_CHUNK 4 | |
1334 | #endif | |
1335 | ||
c906108c SS |
1336 | /* Allocate fields for structs, unions and enums in this size. */ |
1337 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1338 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1339 | #endif | |
1340 | ||
c906108c SS |
1341 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1342 | but this would require a corresponding change in unpack_field_as_long | |
1343 | and friends. */ | |
1344 | static int bits_per_byte = 8; | |
1345 | ||
2ddeaf8a TT |
1346 | /* When reading a variant or variant part, we track a bit more |
1347 | information about the field, and store it in an object of this | |
1348 | type. */ | |
1349 | ||
1350 | struct variant_field | |
1351 | { | |
1352 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1353 | value. */ | |
1354 | ULONGEST discriminant_value; | |
1355 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1356 | default branch. */ | |
1357 | bool default_branch; | |
1358 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1359 | field is the discriminant. */ | |
1360 | bool is_discriminant; | |
1361 | }; | |
1362 | ||
52059ffd TT |
1363 | struct nextfield |
1364 | { | |
be2daae6 TT |
1365 | int accessibility = 0; |
1366 | int virtuality = 0; | |
2ddeaf8a | 1367 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1368 | struct variant_field variant {}; |
1369 | struct field field {}; | |
52059ffd TT |
1370 | }; |
1371 | ||
1372 | struct fnfieldlist | |
1373 | { | |
be2daae6 TT |
1374 | const char *name = nullptr; |
1375 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1376 | }; |
1377 | ||
c906108c SS |
1378 | /* The routines that read and process dies for a C struct or C++ class |
1379 | pass lists of data member fields and lists of member function fields | |
1380 | in an instance of a field_info structure, as defined below. */ | |
1381 | struct field_info | |
c5aa993b | 1382 | { |
0963b4bd | 1383 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1384 | std::vector<struct nextfield> fields; |
1385 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1386 | |
7d0ccb61 | 1387 | /* Number of fields (including baseclasses). */ |
be2daae6 | 1388 | int nfields = 0; |
c906108c | 1389 | |
c5aa993b | 1390 | /* Set if the accesibility of one of the fields is not public. */ |
be2daae6 | 1391 | int non_public_fields = 0; |
c906108c | 1392 | |
c5aa993b JM |
1393 | /* Member function fieldlist array, contains name of possibly overloaded |
1394 | member function, number of overloaded member functions and a pointer | |
1395 | to the head of the member function field chain. */ | |
be2daae6 | 1396 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1397 | |
1398 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1399 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1400 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1401 | |
1402 | /* Nested types defined by this class and the number of elements in this | |
1403 | list. */ | |
be2daae6 | 1404 | std::vector<struct decl_field> nested_types_list; |
c5aa993b | 1405 | }; |
c906108c | 1406 | |
10b3939b DJ |
1407 | /* One item on the queue of compilation units to read in full symbols |
1408 | for. */ | |
1409 | struct dwarf2_queue_item | |
1410 | { | |
1411 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1412 | enum language pretend_language; |
10b3939b DJ |
1413 | struct dwarf2_queue_item *next; |
1414 | }; | |
1415 | ||
1416 | /* The current queue. */ | |
1417 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1418 | ||
ae038cb0 DJ |
1419 | /* Loaded secondary compilation units are kept in memory until they |
1420 | have not been referenced for the processing of this many | |
1421 | compilation units. Set this to zero to disable caching. Cache | |
1422 | sizes of up to at least twenty will improve startup time for | |
1423 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1424 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1425 | static void |
b4f54984 DE |
1426 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1427 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1428 | { |
3e43a32a | 1429 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1430 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1431 | value); |
1432 | } | |
4390d890 | 1433 | \f |
c906108c SS |
1434 | /* local function prototypes */ |
1435 | ||
a32a8923 DE |
1436 | static const char *get_section_name (const struct dwarf2_section_info *); |
1437 | ||
1438 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1439 | ||
918dd910 JK |
1440 | static void dwarf2_find_base_address (struct die_info *die, |
1441 | struct dwarf2_cu *cu); | |
1442 | ||
0018ea6f DE |
1443 | static struct partial_symtab *create_partial_symtab |
1444 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1445 | ||
f1902523 JK |
1446 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1447 | const gdb_byte *info_ptr, | |
1448 | struct die_info *type_unit_die, | |
1449 | int has_children, void *data); | |
1450 | ||
ed2dc618 SM |
1451 | static void dwarf2_build_psymtabs_hard |
1452 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1453 | |
72bf9492 DJ |
1454 | static void scan_partial_symbols (struct partial_die_info *, |
1455 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1456 | int, struct dwarf2_cu *); |
c906108c | 1457 | |
72bf9492 DJ |
1458 | static void add_partial_symbol (struct partial_die_info *, |
1459 | struct dwarf2_cu *); | |
63d06c5c | 1460 | |
72bf9492 DJ |
1461 | static void add_partial_namespace (struct partial_die_info *pdi, |
1462 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1463 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1464 | |
5d7cb8df | 1465 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1466 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1467 | struct dwarf2_cu *cu); |
1468 | ||
72bf9492 DJ |
1469 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1470 | struct dwarf2_cu *cu); | |
91c24f0a | 1471 | |
bc30ff58 JB |
1472 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1473 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1474 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1475 | |
257e7a09 YQ |
1476 | static void dwarf2_read_symtab (struct partial_symtab *, |
1477 | struct objfile *); | |
c906108c | 1478 | |
a14ed312 | 1479 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1480 | |
685af9cd | 1481 | static abbrev_table_up abbrev_table_read_table |
ed2dc618 SM |
1482 | (struct dwarf2_per_objfile *dwarf2_per_objfile, struct dwarf2_section_info *, |
1483 | sect_offset); | |
433df2d4 | 1484 | |
d521ce57 | 1485 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1486 | |
dee91e82 | 1487 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1488 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1489 | |
fb816e8b TV |
1490 | /* A pair of partial_die_info and compilation unit. */ |
1491 | struct cu_partial_die_info | |
1492 | { | |
1493 | /* The compilation unit of the partial_die_info. */ | |
1494 | struct dwarf2_cu *cu; | |
1495 | /* A partial_die_info. */ | |
1496 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1497 | |
1498 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1499 | : cu (cu), | |
1500 | pdi (pdi) | |
1501 | { /* Nothhing. */ } | |
1502 | ||
1503 | private: | |
1504 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1505 | }; |
1506 | ||
122cf0f2 AB |
1507 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1508 | struct dwarf2_cu *); | |
72bf9492 | 1509 | |
d521ce57 TT |
1510 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1511 | struct attribute *, struct attr_abbrev *, | |
1512 | const gdb_byte *); | |
a8329558 | 1513 | |
a1855c1d | 1514 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1515 | |
a1855c1d | 1516 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1517 | |
a1855c1d | 1518 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1519 | |
15f18d14 AT |
1520 | /* Read the next three bytes (little-endian order) as an unsigned integer. */ |
1521 | static unsigned int read_3_bytes (bfd *, const gdb_byte *); | |
1522 | ||
a1855c1d | 1523 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1524 | |
a1855c1d | 1525 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1526 | |
d521ce57 | 1527 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1528 | unsigned int *); |
c906108c | 1529 | |
d521ce57 | 1530 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1531 | |
1532 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1533 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1534 | unsigned int *, unsigned int *); |
613e1657 | 1535 | |
d521ce57 TT |
1536 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1537 | const struct comp_unit_head *, | |
c764a876 DE |
1538 | unsigned int *); |
1539 | ||
d521ce57 | 1540 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1541 | |
ed2dc618 SM |
1542 | static sect_offset read_abbrev_offset |
1543 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1544 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1545 | |
d521ce57 | 1546 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1547 | |
d521ce57 | 1548 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1549 | |
ed2dc618 SM |
1550 | static const char *read_indirect_string |
1551 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1552 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1553 | |
ed2dc618 SM |
1554 | static const char *read_indirect_line_string |
1555 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1556 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1557 | |
ed2dc618 SM |
1558 | static const char *read_indirect_string_at_offset |
1559 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1560 | LONGEST str_offset); | |
927aa2e7 | 1561 | |
ed2dc618 SM |
1562 | static const char *read_indirect_string_from_dwz |
1563 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1564 | |
d521ce57 | 1565 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1566 | |
d521ce57 TT |
1567 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1568 | const gdb_byte *, | |
3019eac3 DE |
1569 | unsigned int *); |
1570 | ||
d521ce57 | 1571 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1572 | ULONGEST str_index); |
3019eac3 | 1573 | |
e142c38c | 1574 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1575 | |
e142c38c DJ |
1576 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1577 | struct dwarf2_cu *); | |
c906108c | 1578 | |
348e048f | 1579 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1580 | unsigned int); |
348e048f | 1581 | |
7d45c7c3 KB |
1582 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1583 | struct dwarf2_cu *cu); | |
1584 | ||
a084a2a6 AT |
1585 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1586 | ||
05cf31d1 JB |
1587 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1588 | struct dwarf2_cu *cu); | |
1589 | ||
e142c38c | 1590 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1591 | |
e142c38c | 1592 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1593 | struct dwarf2_cu **); |
63d06c5c | 1594 | |
9c541725 | 1595 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1596 | struct dwarf2_cu *cu); |
debd256d | 1597 | |
f3f5162e | 1598 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1599 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1600 | CORE_ADDR, int decode_mapping); |
c906108c | 1601 | |
804d2729 TT |
1602 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1603 | const char *); | |
c906108c | 1604 | |
a14ed312 | 1605 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1606 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1607 | |
ff39bb5e | 1608 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1609 | struct dwarf2_cu *); |
c906108c | 1610 | |
ff39bb5e | 1611 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1612 | struct type *type, |
1613 | const char *name, | |
1614 | struct obstack *obstack, | |
12df843f | 1615 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1616 | const gdb_byte **bytes, |
98bfdba5 | 1617 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1618 | |
e7c27a73 | 1619 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1620 | |
b4ba55a1 JB |
1621 | static int need_gnat_info (struct dwarf2_cu *); |
1622 | ||
3e43a32a MS |
1623 | static struct type *die_descriptive_type (struct die_info *, |
1624 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1625 | |
1626 | static void set_descriptive_type (struct type *, struct die_info *, | |
1627 | struct dwarf2_cu *); | |
1628 | ||
e7c27a73 DJ |
1629 | static struct type *die_containing_type (struct die_info *, |
1630 | struct dwarf2_cu *); | |
c906108c | 1631 | |
ff39bb5e | 1632 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1633 | struct dwarf2_cu *); |
c906108c | 1634 | |
f792889a | 1635 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1636 | |
673bfd45 DE |
1637 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1638 | ||
0d5cff50 | 1639 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1640 | |
6e70227d | 1641 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1642 | const char *suffix, int physname, |
1643 | struct dwarf2_cu *cu); | |
63d06c5c | 1644 | |
e7c27a73 | 1645 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1646 | |
348e048f DE |
1647 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1648 | ||
e7c27a73 | 1649 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1650 | |
e7c27a73 | 1651 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1652 | |
96408a79 SA |
1653 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1654 | ||
71a3c369 TT |
1655 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1656 | ||
ff013f42 JK |
1657 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1658 | struct dwarf2_cu *, struct partial_symtab *); | |
1659 | ||
3a2b436a | 1660 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1661 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1662 | enum pc_bounds_kind |
1663 | { | |
e385593e | 1664 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1665 | PC_BOUNDS_NOT_PRESENT, |
1666 | ||
e385593e JK |
1667 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1668 | were present but they do not form a valid range of PC addresses. */ | |
1669 | PC_BOUNDS_INVALID, | |
1670 | ||
3a2b436a JK |
1671 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1672 | PC_BOUNDS_RANGES, | |
1673 | ||
1674 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1675 | PC_BOUNDS_HIGH_LOW, | |
1676 | }; | |
1677 | ||
1678 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1679 | CORE_ADDR *, CORE_ADDR *, | |
1680 | struct dwarf2_cu *, | |
1681 | struct partial_symtab *); | |
c906108c | 1682 | |
fae299cd DC |
1683 | static void get_scope_pc_bounds (struct die_info *, |
1684 | CORE_ADDR *, CORE_ADDR *, | |
1685 | struct dwarf2_cu *); | |
1686 | ||
801e3a5b JB |
1687 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1688 | CORE_ADDR, struct dwarf2_cu *); | |
1689 | ||
a14ed312 | 1690 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1691 | struct dwarf2_cu *); |
c906108c | 1692 | |
a14ed312 | 1693 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1694 | struct type *, struct dwarf2_cu *); |
c906108c | 1695 | |
a14ed312 | 1696 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1697 | struct die_info *, struct type *, |
e7c27a73 | 1698 | struct dwarf2_cu *); |
c906108c | 1699 | |
a14ed312 | 1700 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1701 | struct type *, |
1702 | struct dwarf2_cu *); | |
c906108c | 1703 | |
134d01f1 | 1704 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1705 | |
e7c27a73 | 1706 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1707 | |
e7c27a73 | 1708 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1709 | |
5d7cb8df JK |
1710 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1711 | ||
804d2729 | 1712 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1713 | |
27aa8d6a SW |
1714 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1715 | ||
74921315 KS |
1716 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1717 | ||
f55ee35c JK |
1718 | static struct type *read_module_type (struct die_info *die, |
1719 | struct dwarf2_cu *cu); | |
1720 | ||
38d518c9 | 1721 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1722 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1723 | |
134d01f1 | 1724 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1725 | |
e7c27a73 | 1726 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1727 | |
6e70227d | 1728 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1729 | struct dwarf2_cu *); |
1730 | ||
bf6af496 | 1731 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1732 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1733 | struct die_info *); |
639d11d3 | 1734 | |
dee91e82 | 1735 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1736 | const gdb_byte *info_ptr, |
1737 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1738 | struct die_info *parent); |
1739 | ||
d521ce57 TT |
1740 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1741 | struct die_info **, const gdb_byte *, | |
1742 | int *, int); | |
3019eac3 | 1743 | |
d521ce57 TT |
1744 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1745 | struct die_info **, const gdb_byte *, | |
1746 | int *); | |
93311388 | 1747 | |
e7c27a73 | 1748 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1749 | |
15d034d0 TT |
1750 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1751 | struct obstack *); | |
71c25dea | 1752 | |
15d034d0 | 1753 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1754 | |
15d034d0 | 1755 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1756 | struct die_info *die, |
1757 | struct dwarf2_cu *cu); | |
1758 | ||
ca69b9e6 DE |
1759 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1760 | struct dwarf2_cu *cu); | |
1761 | ||
e142c38c | 1762 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1763 | struct dwarf2_cu **); |
9219021c | 1764 | |
f39c6ffd | 1765 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1766 | |
f39c6ffd | 1767 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1768 | |
a084a2a6 AT |
1769 | static const char *dwarf_unit_type_name (int unit_type); |
1770 | ||
f39c6ffd | 1771 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1772 | |
a121b7c1 | 1773 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1774 | |
f39c6ffd | 1775 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1776 | |
f9aca02d | 1777 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1778 | |
d97bc12b DE |
1779 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1780 | ||
1781 | static void dump_die_for_error (struct die_info *); | |
1782 | ||
1783 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1784 | struct die_info *); | |
c906108c | 1785 | |
d97bc12b | 1786 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1787 | |
51545339 | 1788 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1789 | struct dwarf2_cu *); |
c906108c | 1790 | |
ff39bb5e | 1791 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1792 | |
ff39bb5e | 1793 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1794 | |
348e048f | 1795 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1796 | const struct attribute *, |
348e048f DE |
1797 | struct dwarf2_cu **); |
1798 | ||
10b3939b | 1799 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1800 | const struct attribute *, |
f2f0e013 | 1801 | struct dwarf2_cu **); |
c906108c | 1802 | |
348e048f | 1803 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1804 | const struct attribute *, |
348e048f DE |
1805 | struct dwarf2_cu **); |
1806 | ||
ac9ec31b DE |
1807 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1808 | struct dwarf2_cu *); | |
1809 | ||
1810 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1811 | const struct attribute *, |
ac9ec31b DE |
1812 | struct dwarf2_cu *); |
1813 | ||
e5fe5e75 | 1814 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1815 | |
52dc124a | 1816 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1817 | |
63e43d3a PMR |
1818 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1819 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1820 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1821 | |
c906108c SS |
1822 | /* memory allocation interface */ |
1823 | ||
7b5a2f43 | 1824 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1825 | |
b60c80d6 | 1826 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1827 | |
43f3e411 | 1828 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1829 | |
6e5a29e1 | 1830 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1831 | |
6e5a29e1 | 1832 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1833 | |
6e5a29e1 | 1834 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1835 | |
6e5a29e1 | 1836 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1837 | |
8cf6f0b1 TT |
1838 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1839 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1840 | const struct attribute *attr); |
8cf6f0b1 | 1841 | |
ff39bb5e | 1842 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1843 | struct symbol *sym, |
f1e6e072 TT |
1844 | struct dwarf2_cu *cu, |
1845 | int is_block); | |
4c2df51b | 1846 | |
d521ce57 TT |
1847 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1848 | const gdb_byte *info_ptr, | |
1849 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1850 | |
72bf9492 DJ |
1851 | static hashval_t partial_die_hash (const void *item); |
1852 | ||
1853 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1854 | ||
ae038cb0 | 1855 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1856 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1857 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1858 | |
9816fde3 | 1859 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1860 | struct die_info *comp_unit_die, |
1861 | enum language pretend_language); | |
93311388 | 1862 | |
ed2dc618 | 1863 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1864 | |
dee91e82 | 1865 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1866 | |
f792889a DJ |
1867 | static struct type *set_die_type (struct die_info *, struct type *, |
1868 | struct dwarf2_cu *); | |
1c379e20 | 1869 | |
ed2dc618 | 1870 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1871 | |
ed2dc618 | 1872 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1873 | |
58f0c718 | 1874 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1875 | enum language); |
10b3939b | 1876 | |
95554aad TT |
1877 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1878 | enum language); | |
10b3939b | 1879 | |
f4dc4d17 DE |
1880 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1881 | enum language); | |
1882 | ||
10b3939b DJ |
1883 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1884 | struct dwarf2_per_cu_data *); | |
1885 | ||
ae038cb0 DJ |
1886 | static void dwarf2_mark (struct dwarf2_cu *); |
1887 | ||
1888 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1889 | ||
b64f50a1 | 1890 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1891 | struct dwarf2_per_cu_data *); |
673bfd45 | 1892 | |
f792889a | 1893 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1894 | |
95554aad TT |
1895 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1896 | enum language pretend_language); | |
1897 | ||
ed2dc618 | 1898 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1899 | |
9a49df9d AB |
1900 | static struct type *dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu); |
1901 | static struct type *dwarf2_per_cu_addr_sized_int_type | |
1902 | (struct dwarf2_per_cu_data *per_cu, bool unsigned_p); | |
1903 | ||
b303c6f6 AB |
1904 | /* Class, the destructor of which frees all allocated queue entries. This |
1905 | will only have work to do if an error was thrown while processing the | |
1906 | dwarf. If no error was thrown then the queue entries should have all | |
1907 | been processed, and freed, as we went along. */ | |
1908 | ||
1909 | class dwarf2_queue_guard | |
1910 | { | |
1911 | public: | |
1912 | dwarf2_queue_guard () = default; | |
1913 | ||
1914 | /* Free any entries remaining on the queue. There should only be | |
1915 | entries left if we hit an error while processing the dwarf. */ | |
1916 | ~dwarf2_queue_guard () | |
1917 | { | |
1918 | struct dwarf2_queue_item *item, *last; | |
1919 | ||
1920 | item = dwarf2_queue; | |
1921 | while (item) | |
1922 | { | |
1923 | /* Anything still marked queued is likely to be in an | |
1924 | inconsistent state, so discard it. */ | |
1925 | if (item->per_cu->queued) | |
1926 | { | |
1927 | if (item->per_cu->cu != NULL) | |
1928 | free_one_cached_comp_unit (item->per_cu); | |
1929 | item->per_cu->queued = 0; | |
1930 | } | |
1931 | ||
1932 | last = item; | |
1933 | item = item->next; | |
1934 | xfree (last); | |
1935 | } | |
1936 | ||
1937 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
1938 | } | |
1939 | }; | |
1940 | ||
d721ba37 PA |
1941 | /* The return type of find_file_and_directory. Note, the enclosed |
1942 | string pointers are only valid while this object is valid. */ | |
1943 | ||
1944 | struct file_and_directory | |
1945 | { | |
1946 | /* The filename. This is never NULL. */ | |
1947 | const char *name; | |
1948 | ||
1949 | /* The compilation directory. NULL if not known. If we needed to | |
1950 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1951 | points directly to the DW_AT_comp_dir string attribute owned by | |
1952 | the obstack that owns the DIE. */ | |
1953 | const char *comp_dir; | |
1954 | ||
1955 | /* If we needed to build a new string for comp_dir, this is what | |
1956 | owns the storage. */ | |
1957 | std::string comp_dir_storage; | |
1958 | }; | |
1959 | ||
1960 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1961 | struct dwarf2_cu *cu); | |
9291a0cd TT |
1962 | |
1963 | static char *file_full_name (int file, struct line_header *lh, | |
1964 | const char *comp_dir); | |
1965 | ||
43988095 JK |
1966 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
1967 | enum class rcuh_kind { COMPILE, TYPE }; | |
1968 | ||
d521ce57 | 1969 | static const gdb_byte *read_and_check_comp_unit_head |
ed2dc618 SM |
1970 | (struct dwarf2_per_objfile* dwarf2_per_objfile, |
1971 | struct comp_unit_head *header, | |
36586728 | 1972 | struct dwarf2_section_info *section, |
d521ce57 | 1973 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 1974 | rcuh_kind section_kind); |
36586728 | 1975 | |
fd820528 | 1976 | static void init_cutu_and_read_dies |
f4dc4d17 | 1977 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
58f0c718 | 1978 | int use_existing_cu, int keep, bool skip_partial, |
3019eac3 DE |
1979 | die_reader_func_ftype *die_reader_func, void *data); |
1980 | ||
dee91e82 DE |
1981 | static void init_cutu_and_read_dies_simple |
1982 | (struct dwarf2_per_cu_data *this_cu, | |
1983 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1984 | |
673bfd45 | 1985 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1986 | |
3019eac3 DE |
1987 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1988 | ||
57d63ce2 | 1989 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1990 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1991 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1992 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1993 | |
ed2dc618 SM |
1994 | static struct dwp_file *get_dwp_file |
1995 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1996 | |
3019eac3 | 1997 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1998 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1999 | |
2000 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2001 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2002 | |
89e63ee4 DE |
2003 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2004 | ||
263db9a1 TT |
2005 | /* A unique pointer to a dwo_file. */ |
2006 | ||
51ac9db5 | 2007 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 2008 | |
ed2dc618 | 2009 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 2010 | |
1b80a9fa | 2011 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2012 | |
2013 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2014 | \f |
2015 | /* Various complaints about symbol reading that don't abort the process. */ | |
2016 | ||
2017 | static void | |
2018 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2019 | { | |
b98664d3 | 2020 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
2021 | } |
2022 | ||
2023 | static void | |
2024 | dwarf2_debug_line_missing_file_complaint (void) | |
2025 | { | |
b98664d3 | 2026 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
2027 | } |
2028 | ||
2029 | static void | |
2030 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2031 | { | |
b98664d3 | 2032 | complaint (_(".debug_line section has line " |
4390d890 DE |
2033 | "program sequence without an end")); |
2034 | } | |
2035 | ||
2036 | static void | |
2037 | dwarf2_complex_location_expr_complaint (void) | |
2038 | { | |
b98664d3 | 2039 | complaint (_("location expression too complex")); |
4390d890 DE |
2040 | } |
2041 | ||
2042 | static void | |
2043 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2044 | int arg3) | |
2045 | { | |
b98664d3 | 2046 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
2047 | arg1, arg2, arg3); |
2048 | } | |
2049 | ||
2050 | static void | |
2051 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2052 | { | |
b98664d3 | 2053 | complaint (_("debug info runs off end of %s section" |
4390d890 | 2054 | " [in module %s]"), |
a32a8923 DE |
2055 | get_section_name (section), |
2056 | get_section_file_name (section)); | |
4390d890 | 2057 | } |
1b80a9fa | 2058 | |
4390d890 DE |
2059 | static void |
2060 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2061 | { | |
b98664d3 | 2062 | complaint (_("macro debug info contains a " |
4390d890 DE |
2063 | "malformed macro definition:\n`%s'"), |
2064 | arg1); | |
2065 | } | |
2066 | ||
2067 | static void | |
2068 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2069 | { | |
b98664d3 | 2070 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
2071 | arg1, arg2); |
2072 | } | |
527f3840 JK |
2073 | |
2074 | /* Hash function for line_header_hash. */ | |
2075 | ||
2076 | static hashval_t | |
2077 | line_header_hash (const struct line_header *ofs) | |
2078 | { | |
9c541725 | 2079 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2080 | } |
2081 | ||
2082 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2083 | ||
2084 | static hashval_t | |
2085 | line_header_hash_voidp (const void *item) | |
2086 | { | |
9a3c8263 | 2087 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2088 | |
2089 | return line_header_hash (ofs); | |
2090 | } | |
2091 | ||
2092 | /* Equality function for line_header_hash. */ | |
2093 | ||
2094 | static int | |
2095 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2096 | { | |
9a3c8263 SM |
2097 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2098 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2099 | |
9c541725 | 2100 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2101 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2102 | } | |
2103 | ||
4390d890 | 2104 | \f |
9291a0cd | 2105 | |
31aa7e4e JB |
2106 | /* Read the given attribute value as an address, taking the attribute's |
2107 | form into account. */ | |
2108 | ||
2109 | static CORE_ADDR | |
2110 | attr_value_as_address (struct attribute *attr) | |
2111 | { | |
2112 | CORE_ADDR addr; | |
2113 | ||
336d760d AT |
2114 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_addrx |
2115 | && attr->form != DW_FORM_GNU_addr_index) | |
31aa7e4e JB |
2116 | { |
2117 | /* Aside from a few clearly defined exceptions, attributes that | |
2118 | contain an address must always be in DW_FORM_addr form. | |
2119 | Unfortunately, some compilers happen to be violating this | |
2120 | requirement by encoding addresses using other forms, such | |
2121 | as DW_FORM_data4 for example. For those broken compilers, | |
2122 | we try to do our best, without any guarantee of success, | |
2123 | to interpret the address correctly. It would also be nice | |
2124 | to generate a complaint, but that would require us to maintain | |
2125 | a list of legitimate cases where a non-address form is allowed, | |
2126 | as well as update callers to pass in at least the CU's DWARF | |
2127 | version. This is more overhead than what we're willing to | |
2128 | expand for a pretty rare case. */ | |
2129 | addr = DW_UNSND (attr); | |
2130 | } | |
2131 | else | |
2132 | addr = DW_ADDR (attr); | |
2133 | ||
2134 | return addr; | |
2135 | } | |
2136 | ||
330cdd98 PA |
2137 | /* See declaration. */ |
2138 | ||
2139 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
2140 | const dwarf2_debug_sections *names) | |
2141 | : objfile (objfile_) | |
2142 | { | |
2143 | if (names == NULL) | |
2144 | names = &dwarf2_elf_names; | |
2145 | ||
2146 | bfd *obfd = objfile->obfd; | |
2147 | ||
2148 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2149 | locate_sections (obfd, sec, *names); | |
2150 | } | |
2151 | ||
2152 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2153 | { | |
2154 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2155 | free_cached_comp_units (); | |
2156 | ||
2157 | if (quick_file_names_table) | |
2158 | htab_delete (quick_file_names_table); | |
2159 | ||
2160 | if (line_header_hash) | |
2161 | htab_delete (line_header_hash); | |
2162 | ||
b76e467d SM |
2163 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
2164 | VEC_free (dwarf2_per_cu_ptr, per_cu->imported_symtabs); | |
fc8e7e75 | 2165 | |
b2bdb8cf SM |
2166 | for (signatured_type *sig_type : all_type_units) |
2167 | VEC_free (dwarf2_per_cu_ptr, sig_type->per_cu.imported_symtabs); | |
fc8e7e75 | 2168 | |
330cdd98 PA |
2169 | /* Everything else should be on the objfile obstack. */ |
2170 | } | |
2171 | ||
2172 | /* See declaration. */ | |
2173 | ||
2174 | void | |
2175 | dwarf2_per_objfile::free_cached_comp_units () | |
2176 | { | |
2177 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2178 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2179 | while (per_cu != NULL) | |
2180 | { | |
2181 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2182 | ||
fcd3b13d | 2183 | delete per_cu->cu; |
330cdd98 PA |
2184 | *last_chain = next_cu; |
2185 | per_cu = next_cu; | |
2186 | } | |
2187 | } | |
2188 | ||
11ed8cad TT |
2189 | /* A helper class that calls free_cached_comp_units on |
2190 | destruction. */ | |
2191 | ||
2192 | class free_cached_comp_units | |
2193 | { | |
2194 | public: | |
2195 | ||
2196 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
2197 | : m_per_objfile (per_objfile) | |
2198 | { | |
2199 | } | |
2200 | ||
2201 | ~free_cached_comp_units () | |
2202 | { | |
2203 | m_per_objfile->free_cached_comp_units (); | |
2204 | } | |
2205 | ||
2206 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
2207 | ||
2208 | private: | |
2209 | ||
2210 | dwarf2_per_objfile *m_per_objfile; | |
2211 | }; | |
2212 | ||
c906108c | 2213 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2214 | information and return true if we have enough to do something. |
2215 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
2216 | ELF names are used. */ | |
c906108c SS |
2217 | |
2218 | int | |
251d32d9 TG |
2219 | dwarf2_has_info (struct objfile *objfile, |
2220 | const struct dwarf2_debug_sections *names) | |
c906108c | 2221 | { |
97cbe998 SDJ |
2222 | if (objfile->flags & OBJF_READNEVER) |
2223 | return 0; | |
2224 | ||
ed2dc618 SM |
2225 | struct dwarf2_per_objfile *dwarf2_per_objfile |
2226 | = get_dwarf2_per_objfile (objfile); | |
2227 | ||
2228 | if (dwarf2_per_objfile == NULL) | |
5bfd760d TT |
2229 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
2230 | names); | |
2231 | ||
73869dc2 | 2232 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2233 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2234 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2235 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2236 | } |
2237 | ||
2238 | /* Return the containing section of virtual section SECTION. */ | |
2239 | ||
2240 | static struct dwarf2_section_info * | |
2241 | get_containing_section (const struct dwarf2_section_info *section) | |
2242 | { | |
2243 | gdb_assert (section->is_virtual); | |
2244 | return section->s.containing_section; | |
c906108c SS |
2245 | } |
2246 | ||
a32a8923 DE |
2247 | /* Return the bfd owner of SECTION. */ |
2248 | ||
2249 | static struct bfd * | |
2250 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2251 | { | |
73869dc2 DE |
2252 | if (section->is_virtual) |
2253 | { | |
2254 | section = get_containing_section (section); | |
2255 | gdb_assert (!section->is_virtual); | |
2256 | } | |
049412e3 | 2257 | return section->s.section->owner; |
a32a8923 DE |
2258 | } |
2259 | ||
2260 | /* Return the bfd section of SECTION. | |
2261 | Returns NULL if the section is not present. */ | |
2262 | ||
2263 | static asection * | |
2264 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2265 | { | |
73869dc2 DE |
2266 | if (section->is_virtual) |
2267 | { | |
2268 | section = get_containing_section (section); | |
2269 | gdb_assert (!section->is_virtual); | |
2270 | } | |
049412e3 | 2271 | return section->s.section; |
a32a8923 DE |
2272 | } |
2273 | ||
2274 | /* Return the name of SECTION. */ | |
2275 | ||
2276 | static const char * | |
2277 | get_section_name (const struct dwarf2_section_info *section) | |
2278 | { | |
2279 | asection *sectp = get_section_bfd_section (section); | |
2280 | ||
2281 | gdb_assert (sectp != NULL); | |
2282 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
2283 | } | |
2284 | ||
2285 | /* Return the name of the file SECTION is in. */ | |
2286 | ||
2287 | static const char * | |
2288 | get_section_file_name (const struct dwarf2_section_info *section) | |
2289 | { | |
2290 | bfd *abfd = get_section_bfd_owner (section); | |
2291 | ||
2292 | return bfd_get_filename (abfd); | |
2293 | } | |
2294 | ||
2295 | /* Return the id of SECTION. | |
2296 | Returns 0 if SECTION doesn't exist. */ | |
2297 | ||
2298 | static int | |
2299 | get_section_id (const struct dwarf2_section_info *section) | |
2300 | { | |
2301 | asection *sectp = get_section_bfd_section (section); | |
2302 | ||
2303 | if (sectp == NULL) | |
2304 | return 0; | |
2305 | return sectp->id; | |
2306 | } | |
2307 | ||
2308 | /* Return the flags of SECTION. | |
73869dc2 | 2309 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2310 | |
2311 | static int | |
2312 | get_section_flags (const struct dwarf2_section_info *section) | |
2313 | { | |
2314 | asection *sectp = get_section_bfd_section (section); | |
2315 | ||
2316 | gdb_assert (sectp != NULL); | |
2317 | return bfd_get_section_flags (sectp->owner, sectp); | |
2318 | } | |
2319 | ||
251d32d9 TG |
2320 | /* When loading sections, we look either for uncompressed section or for |
2321 | compressed section names. */ | |
233a11ab CS |
2322 | |
2323 | static int | |
251d32d9 TG |
2324 | section_is_p (const char *section_name, |
2325 | const struct dwarf2_section_names *names) | |
233a11ab | 2326 | { |
251d32d9 TG |
2327 | if (names->normal != NULL |
2328 | && strcmp (section_name, names->normal) == 0) | |
2329 | return 1; | |
2330 | if (names->compressed != NULL | |
2331 | && strcmp (section_name, names->compressed) == 0) | |
2332 | return 1; | |
2333 | return 0; | |
233a11ab CS |
2334 | } |
2335 | ||
330cdd98 | 2336 | /* See declaration. */ |
c906108c | 2337 | |
330cdd98 PA |
2338 | void |
2339 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2340 | const dwarf2_debug_sections &names) | |
c906108c | 2341 | { |
dc7650b8 | 2342 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 | 2343 | |
dc7650b8 JK |
2344 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2345 | { | |
2346 | } | |
330cdd98 | 2347 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2348 | { |
330cdd98 PA |
2349 | this->info.s.section = sectp; |
2350 | this->info.size = bfd_get_section_size (sectp); | |
c906108c | 2351 | } |
330cdd98 | 2352 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2353 | { |
330cdd98 PA |
2354 | this->abbrev.s.section = sectp; |
2355 | this->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 2356 | } |
330cdd98 | 2357 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2358 | { |
330cdd98 PA |
2359 | this->line.s.section = sectp; |
2360 | this->line.size = bfd_get_section_size (sectp); | |
c906108c | 2361 | } |
330cdd98 | 2362 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2363 | { |
330cdd98 PA |
2364 | this->loc.s.section = sectp; |
2365 | this->loc.size = bfd_get_section_size (sectp); | |
c906108c | 2366 | } |
330cdd98 | 2367 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2368 | { |
330cdd98 PA |
2369 | this->loclists.s.section = sectp; |
2370 | this->loclists.size = bfd_get_section_size (sectp); | |
43988095 | 2371 | } |
330cdd98 | 2372 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2373 | { |
330cdd98 PA |
2374 | this->macinfo.s.section = sectp; |
2375 | this->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 2376 | } |
330cdd98 | 2377 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2378 | { |
330cdd98 PA |
2379 | this->macro.s.section = sectp; |
2380 | this->macro.size = bfd_get_section_size (sectp); | |
cf2c3c16 | 2381 | } |
330cdd98 | 2382 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2383 | { |
330cdd98 PA |
2384 | this->str.s.section = sectp; |
2385 | this->str.size = bfd_get_section_size (sectp); | |
c906108c | 2386 | } |
330cdd98 | 2387 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2388 | { |
330cdd98 PA |
2389 | this->line_str.s.section = sectp; |
2390 | this->line_str.size = bfd_get_section_size (sectp); | |
43988095 | 2391 | } |
330cdd98 | 2392 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2393 | { |
330cdd98 PA |
2394 | this->addr.s.section = sectp; |
2395 | this->addr.size = bfd_get_section_size (sectp); | |
3019eac3 | 2396 | } |
330cdd98 | 2397 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2398 | { |
330cdd98 PA |
2399 | this->frame.s.section = sectp; |
2400 | this->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2401 | } |
330cdd98 | 2402 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2403 | { |
330cdd98 PA |
2404 | this->eh_frame.s.section = sectp; |
2405 | this->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 2406 | } |
330cdd98 | 2407 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2408 | { |
330cdd98 PA |
2409 | this->ranges.s.section = sectp; |
2410 | this->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2411 | } |
330cdd98 | 2412 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2413 | { |
330cdd98 PA |
2414 | this->rnglists.s.section = sectp; |
2415 | this->rnglists.size = bfd_get_section_size (sectp); | |
43988095 | 2416 | } |
330cdd98 | 2417 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2418 | { |
8b70b953 TT |
2419 | struct dwarf2_section_info type_section; |
2420 | ||
2421 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2422 | type_section.s.section = sectp; |
8b70b953 TT |
2423 | type_section.size = bfd_get_section_size (sectp); |
2424 | ||
fd5866f6 | 2425 | this->types.push_back (type_section); |
348e048f | 2426 | } |
330cdd98 | 2427 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2428 | { |
330cdd98 PA |
2429 | this->gdb_index.s.section = sectp; |
2430 | this->gdb_index.size = bfd_get_section_size (sectp); | |
9291a0cd | 2431 | } |
927aa2e7 JK |
2432 | else if (section_is_p (sectp->name, &names.debug_names)) |
2433 | { | |
2434 | this->debug_names.s.section = sectp; | |
2435 | this->debug_names.size = bfd_get_section_size (sectp); | |
2436 | } | |
2437 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2438 | { | |
2439 | this->debug_aranges.s.section = sectp; | |
2440 | this->debug_aranges.size = bfd_get_section_size (sectp); | |
2441 | } | |
dce234bc | 2442 | |
b4e1fd61 | 2443 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
72dca2f5 | 2444 | && bfd_section_vma (abfd, sectp) == 0) |
330cdd98 | 2445 | this->has_section_at_zero = true; |
c906108c SS |
2446 | } |
2447 | ||
fceca515 DE |
2448 | /* A helper function that decides whether a section is empty, |
2449 | or not present. */ | |
9e0ac564 TT |
2450 | |
2451 | static int | |
19ac8c2e | 2452 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2453 | { |
73869dc2 DE |
2454 | if (section->is_virtual) |
2455 | return section->size == 0; | |
049412e3 | 2456 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2457 | } |
2458 | ||
cd4fb1b2 | 2459 | /* See dwarf2read.h. */ |
c906108c | 2460 | |
cd4fb1b2 SM |
2461 | void |
2462 | dwarf2_read_section (struct objfile *objfile, dwarf2_section_info *info) | |
c906108c | 2463 | { |
a32a8923 | 2464 | asection *sectp; |
3019eac3 | 2465 | bfd *abfd; |
dce234bc | 2466 | gdb_byte *buf, *retbuf; |
c906108c | 2467 | |
be391dca TT |
2468 | if (info->readin) |
2469 | return; | |
dce234bc | 2470 | info->buffer = NULL; |
dc4ccb6f | 2471 | info->readin = true; |
188dd5d6 | 2472 | |
9e0ac564 | 2473 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2474 | return; |
c906108c | 2475 | |
a32a8923 | 2476 | sectp = get_section_bfd_section (info); |
3019eac3 | 2477 | |
73869dc2 DE |
2478 | /* If this is a virtual section we need to read in the real one first. */ |
2479 | if (info->is_virtual) | |
2480 | { | |
2481 | struct dwarf2_section_info *containing_section = | |
2482 | get_containing_section (info); | |
2483 | ||
2484 | gdb_assert (sectp != NULL); | |
2485 | if ((sectp->flags & SEC_RELOC) != 0) | |
2486 | { | |
2487 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2488 | " supported in section %s [in module %s]"), | |
2489 | get_section_name (info), get_section_file_name (info)); | |
2490 | } | |
2491 | dwarf2_read_section (objfile, containing_section); | |
2492 | /* Other code should have already caught virtual sections that don't | |
2493 | fit. */ | |
2494 | gdb_assert (info->virtual_offset + info->size | |
2495 | <= containing_section->size); | |
2496 | /* If the real section is empty or there was a problem reading the | |
2497 | section we shouldn't get here. */ | |
2498 | gdb_assert (containing_section->buffer != NULL); | |
2499 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2500 | return; | |
2501 | } | |
2502 | ||
4bf44c1c TT |
2503 | /* If the section has relocations, we must read it ourselves. |
2504 | Otherwise we attach it to the BFD. */ | |
2505 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2506 | { |
d521ce57 | 2507 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2508 | return; |
dce234bc | 2509 | } |
dce234bc | 2510 | |
224c3ddb | 2511 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2512 | info->buffer = buf; |
dce234bc PP |
2513 | |
2514 | /* When debugging .o files, we may need to apply relocations; see | |
2515 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2516 | We never compress sections in .o files, so we only need to | |
2517 | try this when the section is not compressed. */ | |
ac8035ab | 2518 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2519 | if (retbuf != NULL) |
2520 | { | |
2521 | info->buffer = retbuf; | |
2522 | return; | |
2523 | } | |
2524 | ||
a32a8923 DE |
2525 | abfd = get_section_bfd_owner (info); |
2526 | gdb_assert (abfd != NULL); | |
2527 | ||
dce234bc PP |
2528 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2529 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2530 | { |
2531 | error (_("Dwarf Error: Can't read DWARF data" | |
2532 | " in section %s [in module %s]"), | |
2533 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2534 | } | |
dce234bc PP |
2535 | } |
2536 | ||
9e0ac564 TT |
2537 | /* A helper function that returns the size of a section in a safe way. |
2538 | If you are positive that the section has been read before using the | |
2539 | size, then it is safe to refer to the dwarf2_section_info object's | |
2540 | "size" field directly. In other cases, you must call this | |
2541 | function, because for compressed sections the size field is not set | |
2542 | correctly until the section has been read. */ | |
2543 | ||
2544 | static bfd_size_type | |
2545 | dwarf2_section_size (struct objfile *objfile, | |
2546 | struct dwarf2_section_info *info) | |
2547 | { | |
2548 | if (!info->readin) | |
2549 | dwarf2_read_section (objfile, info); | |
2550 | return info->size; | |
2551 | } | |
2552 | ||
dce234bc | 2553 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2554 | SECTION_NAME. */ |
af34e669 | 2555 | |
dce234bc | 2556 | void |
3017a003 TG |
2557 | dwarf2_get_section_info (struct objfile *objfile, |
2558 | enum dwarf2_section_enum sect, | |
d521ce57 | 2559 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2560 | bfd_size_type *sizep) |
2561 | { | |
5bfd760d | 2562 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2563 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2564 | |
2565 | /* We may see an objfile without any DWARF, in which case we just | |
2566 | return nothing. */ | |
2567 | if (data == NULL) | |
2568 | { | |
2569 | *sectp = NULL; | |
2570 | *bufp = NULL; | |
2571 | *sizep = 0; | |
2572 | return; | |
2573 | } | |
3017a003 TG |
2574 | switch (sect) |
2575 | { | |
2576 | case DWARF2_DEBUG_FRAME: | |
2577 | info = &data->frame; | |
2578 | break; | |
2579 | case DWARF2_EH_FRAME: | |
2580 | info = &data->eh_frame; | |
2581 | break; | |
2582 | default: | |
2583 | gdb_assert_not_reached ("unexpected section"); | |
2584 | } | |
dce234bc | 2585 | |
9e0ac564 | 2586 | dwarf2_read_section (objfile, info); |
dce234bc | 2587 | |
a32a8923 | 2588 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2589 | *bufp = info->buffer; |
2590 | *sizep = info->size; | |
2591 | } | |
2592 | ||
36586728 TT |
2593 | /* A helper function to find the sections for a .dwz file. */ |
2594 | ||
2595 | static void | |
2596 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2597 | { | |
9a3c8263 | 2598 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2599 | |
2600 | /* Note that we only support the standard ELF names, because .dwz | |
2601 | is ELF-only (at the time of writing). */ | |
2602 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2603 | { | |
049412e3 | 2604 | dwz_file->abbrev.s.section = sectp; |
36586728 TT |
2605 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
2606 | } | |
2607 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2608 | { | |
049412e3 | 2609 | dwz_file->info.s.section = sectp; |
36586728 TT |
2610 | dwz_file->info.size = bfd_get_section_size (sectp); |
2611 | } | |
2612 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2613 | { | |
049412e3 | 2614 | dwz_file->str.s.section = sectp; |
36586728 TT |
2615 | dwz_file->str.size = bfd_get_section_size (sectp); |
2616 | } | |
2617 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2618 | { | |
049412e3 | 2619 | dwz_file->line.s.section = sectp; |
36586728 TT |
2620 | dwz_file->line.size = bfd_get_section_size (sectp); |
2621 | } | |
2622 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2623 | { | |
049412e3 | 2624 | dwz_file->macro.s.section = sectp; |
36586728 TT |
2625 | dwz_file->macro.size = bfd_get_section_size (sectp); |
2626 | } | |
2ec9a5e0 TT |
2627 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2628 | { | |
049412e3 | 2629 | dwz_file->gdb_index.s.section = sectp; |
2ec9a5e0 TT |
2630 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
2631 | } | |
927aa2e7 JK |
2632 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2633 | { | |
2634 | dwz_file->debug_names.s.section = sectp; | |
2635 | dwz_file->debug_names.size = bfd_get_section_size (sectp); | |
2636 | } | |
36586728 TT |
2637 | } |
2638 | ||
c4973306 | 2639 | /* See dwarf2read.h. */ |
36586728 | 2640 | |
c4973306 | 2641 | struct dwz_file * |
ed2dc618 | 2642 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2643 | { |
36586728 | 2644 | const char *filename; |
acd13123 | 2645 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2646 | size_t buildid_len; |
2647 | bfd_byte *buildid; | |
36586728 TT |
2648 | |
2649 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2650 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2651 | |
4db1a1dc | 2652 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2653 | gdb::unique_xmalloc_ptr<char> data |
2654 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2655 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2656 | if (data == NULL) |
2657 | { | |
2658 | if (bfd_get_error () == bfd_error_no_error) | |
2659 | return NULL; | |
2660 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2661 | bfd_errmsg (bfd_get_error ())); | |
2662 | } | |
791afaa2 TT |
2663 | |
2664 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2665 | |
acd13123 TT |
2666 | buildid_len = (size_t) buildid_len_arg; |
2667 | ||
791afaa2 | 2668 | filename = data.get (); |
d721ba37 PA |
2669 | |
2670 | std::string abs_storage; | |
36586728 TT |
2671 | if (!IS_ABSOLUTE_PATH (filename)) |
2672 | { | |
14278e1f TT |
2673 | gdb::unique_xmalloc_ptr<char> abs |
2674 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2675 | |
14278e1f | 2676 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2677 | filename = abs_storage.c_str (); |
36586728 TT |
2678 | } |
2679 | ||
dc294be5 TT |
2680 | /* First try the file name given in the section. If that doesn't |
2681 | work, try to use the build-id instead. */ | |
192b62ce | 2682 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2683 | if (dwz_bfd != NULL) |
36586728 | 2684 | { |
192b62ce | 2685 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2686 | dwz_bfd.reset (nullptr); |
36586728 TT |
2687 | } |
2688 | ||
dc294be5 TT |
2689 | if (dwz_bfd == NULL) |
2690 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2691 | ||
2692 | if (dwz_bfd == NULL) | |
2693 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2694 | objfile_name (dwarf2_per_objfile->objfile)); | |
2695 | ||
7ff8cb8c TT |
2696 | std::unique_ptr<struct dwz_file> result |
2697 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2698 | |
7ff8cb8c TT |
2699 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2700 | result.get ()); | |
36586728 | 2701 | |
7ff8cb8c TT |
2702 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2703 | result->dwz_bfd.get ()); | |
2704 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2705 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2706 | } |
9291a0cd | 2707 | \f |
7b9f3c50 DE |
2708 | /* DWARF quick_symbols_functions support. */ |
2709 | ||
2710 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2711 | unique line tables, so we maintain a separate table of all .debug_line | |
2712 | derived entries to support the sharing. | |
2713 | All the quick functions need is the list of file names. We discard the | |
2714 | line_header when we're done and don't need to record it here. */ | |
2715 | struct quick_file_names | |
2716 | { | |
094b34ac DE |
2717 | /* The data used to construct the hash key. */ |
2718 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2719 | |
2720 | /* The number of entries in file_names, real_names. */ | |
2721 | unsigned int num_file_names; | |
2722 | ||
2723 | /* The file names from the line table, after being run through | |
2724 | file_full_name. */ | |
2725 | const char **file_names; | |
2726 | ||
2727 | /* The file names from the line table after being run through | |
2728 | gdb_realpath. These are computed lazily. */ | |
2729 | const char **real_names; | |
2730 | }; | |
2731 | ||
2732 | /* When using the index (and thus not using psymtabs), each CU has an | |
2733 | object of this type. This is used to hold information needed by | |
2734 | the various "quick" methods. */ | |
2735 | struct dwarf2_per_cu_quick_data | |
2736 | { | |
2737 | /* The file table. This can be NULL if there was no file table | |
2738 | or it's currently not read in. | |
2739 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2740 | struct quick_file_names *file_names; | |
2741 | ||
2742 | /* The corresponding symbol table. This is NULL if symbols for this | |
2743 | CU have not yet been read. */ | |
43f3e411 | 2744 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2745 | |
2746 | /* A temporary mark bit used when iterating over all CUs in | |
2747 | expand_symtabs_matching. */ | |
2748 | unsigned int mark : 1; | |
2749 | ||
2750 | /* True if we've tried to read the file table and found there isn't one. | |
2751 | There will be no point in trying to read it again next time. */ | |
2752 | unsigned int no_file_data : 1; | |
2753 | }; | |
2754 | ||
094b34ac DE |
2755 | /* Utility hash function for a stmt_list_hash. */ |
2756 | ||
2757 | static hashval_t | |
2758 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2759 | { | |
2760 | hashval_t v = 0; | |
2761 | ||
2762 | if (stmt_list_hash->dwo_unit != NULL) | |
2763 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2764 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2765 | return v; |
2766 | } | |
2767 | ||
2768 | /* Utility equality function for a stmt_list_hash. */ | |
2769 | ||
2770 | static int | |
2771 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2772 | const struct stmt_list_hash *rhs) | |
2773 | { | |
2774 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2775 | return 0; | |
2776 | if (lhs->dwo_unit != NULL | |
2777 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2778 | return 0; | |
2779 | ||
9c541725 | 2780 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2781 | } |
2782 | ||
7b9f3c50 DE |
2783 | /* Hash function for a quick_file_names. */ |
2784 | ||
2785 | static hashval_t | |
2786 | hash_file_name_entry (const void *e) | |
2787 | { | |
9a3c8263 SM |
2788 | const struct quick_file_names *file_data |
2789 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2790 | |
094b34ac | 2791 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2792 | } |
2793 | ||
2794 | /* Equality function for a quick_file_names. */ | |
2795 | ||
2796 | static int | |
2797 | eq_file_name_entry (const void *a, const void *b) | |
2798 | { | |
9a3c8263 SM |
2799 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2800 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2801 | |
094b34ac | 2802 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2803 | } |
2804 | ||
2805 | /* Delete function for a quick_file_names. */ | |
2806 | ||
2807 | static void | |
2808 | delete_file_name_entry (void *e) | |
2809 | { | |
9a3c8263 | 2810 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2811 | int i; |
2812 | ||
2813 | for (i = 0; i < file_data->num_file_names; ++i) | |
2814 | { | |
2815 | xfree ((void*) file_data->file_names[i]); | |
2816 | if (file_data->real_names) | |
2817 | xfree ((void*) file_data->real_names[i]); | |
2818 | } | |
2819 | ||
2820 | /* The space for the struct itself lives on objfile_obstack, | |
2821 | so we don't free it here. */ | |
2822 | } | |
2823 | ||
2824 | /* Create a quick_file_names hash table. */ | |
2825 | ||
2826 | static htab_t | |
2827 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2828 | { | |
2829 | return htab_create_alloc (nr_initial_entries, | |
2830 | hash_file_name_entry, eq_file_name_entry, | |
2831 | delete_file_name_entry, xcalloc, xfree); | |
2832 | } | |
9291a0cd | 2833 | |
918dd910 JK |
2834 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2835 | have to be created afterwards. You should call age_cached_comp_units after | |
2836 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2837 | ||
2838 | static void | |
58f0c718 | 2839 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2840 | { |
3019eac3 | 2841 | if (per_cu->is_debug_types) |
e5fe5e75 | 2842 | load_full_type_unit (per_cu); |
918dd910 | 2843 | else |
58f0c718 | 2844 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2845 | |
cc12ce38 DE |
2846 | if (per_cu->cu == NULL) |
2847 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2848 | |
2849 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2850 | } |
2851 | ||
a0f42c21 | 2852 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2853 | |
9291a0cd | 2854 | static void |
58f0c718 | 2855 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2856 | { |
ed2dc618 | 2857 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2858 | |
f4dc4d17 DE |
2859 | /* Skip type_unit_groups, reading the type units they contain |
2860 | is handled elsewhere. */ | |
2861 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2862 | return; | |
2863 | ||
b303c6f6 AB |
2864 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2865 | the queue. After this point we're guaranteed to leave this function | |
2866 | with the dwarf queue empty. */ | |
2867 | dwarf2_queue_guard q_guard; | |
9291a0cd | 2868 | |
95554aad | 2869 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2870 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2871 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2872 | { | |
2873 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2874 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2875 | |
2876 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2877 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2878 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2879 | if (!per_cu->is_debug_types | |
cc12ce38 | 2880 | && per_cu->cu != NULL |
89e63ee4 DE |
2881 | && per_cu->cu->dwo_unit != NULL |
2882 | && dwarf2_per_objfile->index_table != NULL | |
2883 | && dwarf2_per_objfile->index_table->version <= 7 | |
2884 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2885 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2886 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2887 | } |
9291a0cd | 2888 | |
ed2dc618 | 2889 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2890 | |
2891 | /* Age the cache, releasing compilation units that have not | |
2892 | been used recently. */ | |
ed2dc618 | 2893 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2894 | } |
2895 | ||
2896 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2897 | the objfile from which this CU came. Returns the resulting symbol | |
2898 | table. */ | |
2fdf6df6 | 2899 | |
43f3e411 | 2900 | static struct compunit_symtab * |
58f0c718 | 2901 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2902 | { |
ed2dc618 SM |
2903 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2904 | ||
95554aad | 2905 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2906 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2907 | { |
11ed8cad | 2908 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2909 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2910 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2911 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2912 | } |
f194fefb | 2913 | |
43f3e411 | 2914 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2915 | } |
2916 | ||
ff4c9fec | 2917 | /* See declaration. */ |
f4dc4d17 | 2918 | |
ff4c9fec SM |
2919 | dwarf2_per_cu_data * |
2920 | dwarf2_per_objfile::get_cutu (int index) | |
2921 | { | |
b76e467d | 2922 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2923 | { |
b76e467d | 2924 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2925 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2926 | return &this->all_type_units[index]->per_cu; |
2927 | } | |
f4dc4d17 | 2928 | |
ff4c9fec SM |
2929 | return this->all_comp_units[index]; |
2930 | } | |
f4dc4d17 | 2931 | |
ff4c9fec | 2932 | /* See declaration. */ |
2fdf6df6 | 2933 | |
ff4c9fec SM |
2934 | dwarf2_per_cu_data * |
2935 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2936 | { |
b76e467d | 2937 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2938 | |
ff4c9fec | 2939 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2940 | } |
2941 | ||
ff4c9fec | 2942 | /* See declaration. */ |
f4dc4d17 | 2943 | |
ff4c9fec SM |
2944 | signatured_type * |
2945 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2946 | { |
b2bdb8cf | 2947 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2948 | |
ff4c9fec | 2949 | return this->all_type_units[index]; |
1fd400ff TT |
2950 | } |
2951 | ||
4b514bc8 JK |
2952 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2953 | objfile_obstack, and constructed with the specified field | |
2954 | values. */ | |
2955 | ||
2956 | static dwarf2_per_cu_data * | |
ed2dc618 | 2957 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2958 | struct dwarf2_section_info *section, |
2959 | int is_dwz, | |
2960 | sect_offset sect_off, ULONGEST length) | |
2961 | { | |
ed2dc618 | 2962 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2963 | dwarf2_per_cu_data *the_cu |
2964 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2965 | struct dwarf2_per_cu_data); | |
2966 | the_cu->sect_off = sect_off; | |
2967 | the_cu->length = length; | |
e3b94546 | 2968 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2969 | the_cu->section = section; |
2970 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2971 | struct dwarf2_per_cu_quick_data); | |
2972 | the_cu->is_dwz = is_dwz; | |
2973 | return the_cu; | |
2974 | } | |
2975 | ||
2ec9a5e0 TT |
2976 | /* A helper for create_cus_from_index that handles a given list of |
2977 | CUs. */ | |
2fdf6df6 | 2978 | |
74a0d9f6 | 2979 | static void |
12359b5e | 2980 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2981 | const gdb_byte *cu_list, offset_type n_elements, |
2982 | struct dwarf2_section_info *section, | |
b76e467d | 2983 | int is_dwz) |
9291a0cd | 2984 | { |
12359b5e | 2985 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2986 | { |
74a0d9f6 | 2987 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2988 | |
2989 | sect_offset sect_off | |
2990 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2991 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2992 | cu_list += 2 * 8; |
2993 | ||
b76e467d | 2994 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2995 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2996 | sect_off, length); | |
b76e467d | 2997 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2998 | } |
9291a0cd TT |
2999 | } |
3000 | ||
2ec9a5e0 | 3001 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3002 | the CU objects for this objfile. */ |
2ec9a5e0 | 3003 | |
74a0d9f6 | 3004 | static void |
12359b5e | 3005 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
3006 | const gdb_byte *cu_list, offset_type cu_list_elements, |
3007 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3008 | { | |
b76e467d SM |
3009 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
3010 | dwarf2_per_objfile->all_comp_units.reserve | |
3011 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 3012 | |
12359b5e | 3013 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 3014 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
3015 | |
3016 | if (dwz_elements == 0) | |
74a0d9f6 | 3017 | return; |
2ec9a5e0 | 3018 | |
12359b5e SM |
3019 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
3020 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 3021 | &dwz->info, 1); |
2ec9a5e0 TT |
3022 | } |
3023 | ||
1fd400ff | 3024 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3025 | |
74a0d9f6 | 3026 | static void |
12359b5e SM |
3027 | create_signatured_type_table_from_index |
3028 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3029 | struct dwarf2_section_info *section, | |
3030 | const gdb_byte *bytes, | |
3031 | offset_type elements) | |
1fd400ff | 3032 | { |
12359b5e | 3033 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 3034 | |
b2bdb8cf SM |
3035 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3036 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 3037 | |
12359b5e | 3038 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff | 3039 | |
12359b5e | 3040 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 3041 | { |
52dc124a | 3042 | struct signatured_type *sig_type; |
9c541725 | 3043 | ULONGEST signature; |
1fd400ff | 3044 | void **slot; |
9c541725 | 3045 | cu_offset type_offset_in_tu; |
1fd400ff | 3046 | |
74a0d9f6 | 3047 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3048 | sect_offset sect_off |
3049 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3050 | type_offset_in_tu | |
3051 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3052 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3053 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3054 | bytes += 3 * 8; | |
3055 | ||
52dc124a | 3056 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3057 | struct signatured_type); |
52dc124a | 3058 | sig_type->signature = signature; |
9c541725 | 3059 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3060 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3061 | sig_type->per_cu.section = section; |
9c541725 | 3062 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 3063 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 3064 | sig_type->per_cu.v.quick |
1fd400ff TT |
3065 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3066 | struct dwarf2_per_cu_quick_data); | |
3067 | ||
52dc124a DE |
3068 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3069 | *slot = sig_type; | |
1fd400ff | 3070 | |
b2bdb8cf | 3071 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
3072 | } |
3073 | ||
673bfd45 | 3074 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3075 | } |
3076 | ||
927aa2e7 JK |
3077 | /* Create the signatured type hash table from .debug_names. */ |
3078 | ||
3079 | static void | |
3080 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 3081 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3082 | const mapped_debug_names &map, |
3083 | struct dwarf2_section_info *section, | |
3084 | struct dwarf2_section_info *abbrev_section) | |
3085 | { | |
ed2dc618 SM |
3086 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3087 | ||
927aa2e7 JK |
3088 | dwarf2_read_section (objfile, section); |
3089 | dwarf2_read_section (objfile, abbrev_section); | |
3090 | ||
b2bdb8cf SM |
3091 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3092 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 JK |
3093 | |
3094 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); | |
3095 | ||
3096 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
3097 | { | |
3098 | struct signatured_type *sig_type; | |
927aa2e7 | 3099 | void **slot; |
927aa2e7 JK |
3100 | |
3101 | sect_offset sect_off | |
3102 | = (sect_offset) (extract_unsigned_integer | |
3103 | (map.tu_table_reordered + i * map.offset_size, | |
3104 | map.offset_size, | |
3105 | map.dwarf5_byte_order)); | |
3106 | ||
3107 | comp_unit_head cu_header; | |
ed2dc618 SM |
3108 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
3109 | abbrev_section, | |
927aa2e7 JK |
3110 | section->buffer + to_underlying (sect_off), |
3111 | rcuh_kind::TYPE); | |
3112 | ||
3113 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3114 | struct signatured_type); | |
3115 | sig_type->signature = cu_header.signature; | |
3116 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
3117 | sig_type->per_cu.is_debug_types = 1; | |
3118 | sig_type->per_cu.section = section; | |
3119 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 3120 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
3121 | sig_type->per_cu.v.quick |
3122 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3123 | struct dwarf2_per_cu_quick_data); | |
3124 | ||
3125 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); | |
3126 | *slot = sig_type; | |
3127 | ||
b2bdb8cf | 3128 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
3129 | } |
3130 | ||
3131 | dwarf2_per_objfile->signatured_types = sig_types_hash; | |
3132 | } | |
3133 | ||
9291a0cd TT |
3134 | /* Read the address map data from the mapped index, and use it to |
3135 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3136 | |
9291a0cd | 3137 | static void |
ed2dc618 SM |
3138 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
3139 | struct mapped_index *index) | |
9291a0cd | 3140 | { |
ed2dc618 | 3141 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 3142 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3143 | const gdb_byte *iter, *end; |
9291a0cd | 3144 | struct addrmap *mutable_map; |
9291a0cd TT |
3145 | CORE_ADDR baseaddr; |
3146 | ||
8268c778 PA |
3147 | auto_obstack temp_obstack; |
3148 | ||
9291a0cd TT |
3149 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3150 | ||
f00a2de2 PA |
3151 | iter = index->address_table.data (); |
3152 | end = iter + index->address_table.size (); | |
9291a0cd TT |
3153 | |
3154 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3155 | ||
3156 | while (iter < end) | |
3157 | { | |
3158 | ULONGEST hi, lo, cu_index; | |
3159 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3160 | iter += 8; | |
3161 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3162 | iter += 8; | |
3163 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3164 | iter += 4; | |
f652bce2 | 3165 | |
24a55014 | 3166 | if (lo > hi) |
f652bce2 | 3167 | { |
b98664d3 | 3168 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 3169 | hex_string (lo), hex_string (hi)); |
24a55014 | 3170 | continue; |
f652bce2 | 3171 | } |
24a55014 | 3172 | |
b76e467d | 3173 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 3174 | { |
b98664d3 | 3175 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 3176 | (unsigned) cu_index); |
24a55014 | 3177 | continue; |
f652bce2 | 3178 | } |
24a55014 | 3179 | |
79748972 TT |
3180 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
3181 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 3182 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 3183 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
3184 | } |
3185 | ||
d320c2b5 | 3186 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3187 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
3188 | } |
3189 | ||
927aa2e7 JK |
3190 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
3191 | populate the objfile's psymtabs_addrmap. */ | |
3192 | ||
3193 | static void | |
ed2dc618 | 3194 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3195 | struct dwarf2_section_info *section) |
3196 | { | |
ed2dc618 | 3197 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
3198 | bfd *abfd = objfile->obfd; |
3199 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
3200 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
3201 | SECT_OFF_TEXT (objfile)); | |
3202 | ||
3203 | auto_obstack temp_obstack; | |
3204 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
3205 | ||
3206 | std::unordered_map<sect_offset, | |
3207 | dwarf2_per_cu_data *, | |
3208 | gdb::hash_enum<sect_offset>> | |
3209 | debug_info_offset_to_per_cu; | |
b76e467d | 3210 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 3211 | { |
927aa2e7 JK |
3212 | const auto insertpair |
3213 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
3214 | if (!insertpair.second) | |
3215 | { | |
3216 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
3217 | "debug_info_offset %s, ignoring .debug_aranges."), |
3218 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
3219 | return; |
3220 | } | |
3221 | } | |
3222 | ||
3223 | dwarf2_read_section (objfile, section); | |
3224 | ||
3225 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
3226 | ||
3227 | const gdb_byte *addr = section->buffer; | |
3228 | ||
3229 | while (addr < section->buffer + section->size) | |
3230 | { | |
3231 | const gdb_byte *const entry_addr = addr; | |
3232 | unsigned int bytes_read; | |
3233 | ||
3234 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
3235 | &bytes_read); | |
3236 | addr += bytes_read; | |
3237 | ||
3238 | const gdb_byte *const entry_end = addr + entry_length; | |
3239 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
3240 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
3241 | if (addr + entry_length > section->buffer + section->size) | |
3242 | { | |
47e3f474 | 3243 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3244 | "length %s exceeds section length %s, " |
3245 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3246 | objfile_name (objfile), |
3247 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3248 | plongest (bytes_read + entry_length), |
3249 | pulongest (section->size)); | |
3250 | return; | |
3251 | } | |
3252 | ||
3253 | /* The version number. */ | |
3254 | const uint16_t version = read_2_bytes (abfd, addr); | |
3255 | addr += 2; | |
3256 | if (version != 2) | |
3257 | { | |
47e3f474 | 3258 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3259 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
3260 | objfile_name (objfile), |
3261 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
3262 | return; |
3263 | } | |
3264 | ||
3265 | const uint64_t debug_info_offset | |
3266 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
3267 | addr += offset_size; | |
3268 | const auto per_cu_it | |
3269 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
3270 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
3271 | { | |
47e3f474 | 3272 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3273 | "debug_info_offset %s does not exists, " |
3274 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3275 | objfile_name (objfile), |
3276 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3277 | pulongest (debug_info_offset)); |
3278 | return; | |
3279 | } | |
3280 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
3281 | ||
3282 | const uint8_t address_size = *addr++; | |
3283 | if (address_size < 1 || address_size > 8) | |
3284 | { | |
47e3f474 | 3285 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3286 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
3287 | objfile_name (objfile), |
3288 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
3289 | return; |
3290 | } | |
3291 | ||
3292 | const uint8_t segment_selector_size = *addr++; | |
3293 | if (segment_selector_size != 0) | |
3294 | { | |
47e3f474 | 3295 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3296 | "segment_selector_size %u is not supported, " |
3297 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3298 | objfile_name (objfile), |
3299 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3300 | segment_selector_size); |
3301 | return; | |
3302 | } | |
3303 | ||
3304 | /* Must pad to an alignment boundary that is twice the address | |
3305 | size. It is undocumented by the DWARF standard but GCC does | |
3306 | use it. */ | |
3307 | for (size_t padding = ((-(addr - section->buffer)) | |
3308 | & (2 * address_size - 1)); | |
3309 | padding > 0; padding--) | |
3310 | if (*addr++ != 0) | |
3311 | { | |
47e3f474 | 3312 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3313 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
3314 | objfile_name (objfile), |
3315 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3316 | return; |
3317 | } | |
3318 | ||
3319 | for (;;) | |
3320 | { | |
3321 | if (addr + 2 * address_size > entry_end) | |
3322 | { | |
47e3f474 | 3323 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3324 | "address list is not properly terminated, " |
3325 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3326 | objfile_name (objfile), |
3327 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3328 | return; |
3329 | } | |
3330 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
3331 | dwarf5_byte_order); | |
3332 | addr += address_size; | |
3333 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
3334 | dwarf5_byte_order); | |
3335 | addr += address_size; | |
3336 | if (start == 0 && length == 0) | |
3337 | break; | |
3338 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
3339 | { | |
3340 | /* Symbol was eliminated due to a COMDAT group. */ | |
3341 | continue; | |
3342 | } | |
3343 | ULONGEST end = start + length; | |
79748972 TT |
3344 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
3345 | - baseaddr); | |
3346 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
3347 | - baseaddr); | |
927aa2e7 JK |
3348 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
3349 | } | |
3350 | } | |
3351 | ||
d320c2b5 | 3352 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3353 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
3354 | } |
3355 | ||
9291a0cd TT |
3356 | /* Find a slot in the mapped index INDEX for the object named NAME. |
3357 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3358 | constant pool and return true. If NAME cannot be found, return |
3359 | false. */ | |
2fdf6df6 | 3360 | |
109483d9 | 3361 | static bool |
9291a0cd TT |
3362 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3363 | offset_type **vec_out) | |
3364 | { | |
0cf03b49 | 3365 | offset_type hash; |
9291a0cd | 3366 | offset_type slot, step; |
559a7a62 | 3367 | int (*cmp) (const char *, const char *); |
9291a0cd | 3368 | |
791afaa2 | 3369 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3370 | if (current_language->la_language == language_cplus |
45280282 IB |
3371 | || current_language->la_language == language_fortran |
3372 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3373 | { |
3374 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3375 | not contain any. */ | |
a8719064 | 3376 | |
72998fb3 | 3377 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3378 | { |
109483d9 | 3379 | without_params = cp_remove_params (name); |
0cf03b49 | 3380 | |
72998fb3 | 3381 | if (without_params != NULL) |
791afaa2 | 3382 | name = without_params.get (); |
0cf03b49 JK |
3383 | } |
3384 | } | |
3385 | ||
559a7a62 | 3386 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3387 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3388 | simulate our NAME being searched is also lowercased. */ |
3389 | hash = mapped_index_string_hash ((index->version == 4 | |
3390 | && case_sensitivity == case_sensitive_off | |
3391 | ? 5 : index->version), | |
3392 | name); | |
3393 | ||
f00a2de2 PA |
3394 | slot = hash & (index->symbol_table.size () - 1); |
3395 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 3396 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3397 | |
3398 | for (;;) | |
3399 | { | |
9291a0cd | 3400 | const char *str; |
f00a2de2 PA |
3401 | |
3402 | const auto &bucket = index->symbol_table[slot]; | |
3403 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 3404 | return false; |
9291a0cd | 3405 | |
f00a2de2 | 3406 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 3407 | if (!cmp (name, str)) |
9291a0cd TT |
3408 | { |
3409 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 3410 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 3411 | return true; |
9291a0cd TT |
3412 | } |
3413 | ||
f00a2de2 | 3414 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
3415 | } |
3416 | } | |
3417 | ||
4485a1c1 SM |
3418 | /* A helper function that reads the .gdb_index from BUFFER and fills |
3419 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 3420 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
3421 | ok to use deprecated sections. |
3422 | ||
3423 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3424 | out parameters that are filled in with information about the CU and | |
3425 | TU lists in the section. | |
3426 | ||
4485a1c1 | 3427 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 3428 | |
d33bc52e | 3429 | static bool |
4485a1c1 SM |
3430 | read_gdb_index_from_buffer (struct objfile *objfile, |
3431 | const char *filename, | |
3432 | bool deprecated_ok, | |
3433 | gdb::array_view<const gdb_byte> buffer, | |
3434 | struct mapped_index *map, | |
3435 | const gdb_byte **cu_list, | |
3436 | offset_type *cu_list_elements, | |
3437 | const gdb_byte **types_list, | |
3438 | offset_type *types_list_elements) | |
3439 | { | |
3440 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 3441 | |
9291a0cd | 3442 | /* Version check. */ |
4485a1c1 | 3443 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3444 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3445 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3446 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3447 | indices. */ |
831adc1f | 3448 | if (version < 4) |
481860b3 GB |
3449 | { |
3450 | static int warning_printed = 0; | |
3451 | if (!warning_printed) | |
3452 | { | |
3453 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3454 | filename); |
481860b3 GB |
3455 | warning_printed = 1; |
3456 | } | |
3457 | return 0; | |
3458 | } | |
3459 | /* Index version 4 uses a different hash function than index version | |
3460 | 5 and later. | |
3461 | ||
3462 | Versions earlier than 6 did not emit psymbols for inlined | |
3463 | functions. Using these files will cause GDB not to be able to | |
3464 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3465 | indices unless the user has done |
3466 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3467 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3468 | { |
3469 | static int warning_printed = 0; | |
3470 | if (!warning_printed) | |
3471 | { | |
e615022a DE |
3472 | warning (_("\ |
3473 | Skipping deprecated .gdb_index section in %s.\n\ | |
3474 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3475 | to use the section anyway."), | |
2ec9a5e0 | 3476 | filename); |
481860b3 GB |
3477 | warning_printed = 1; |
3478 | } | |
3479 | return 0; | |
3480 | } | |
796a7ff8 | 3481 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3482 | of the TU (for symbols coming from TUs), |
3483 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3484 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3485 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3486 | These are just performance bugs, and we can't distinguish gdb-generated | |
3487 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3488 | |
481860b3 | 3489 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3490 | longer backward compatible. */ |
796a7ff8 | 3491 | if (version > 8) |
594e8718 | 3492 | return 0; |
9291a0cd | 3493 | |
559a7a62 | 3494 | map->version = version; |
9291a0cd | 3495 | |
4485a1c1 | 3496 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 3497 | |
4485a1c1 | 3498 | int i = 0; |
2ec9a5e0 TT |
3499 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3500 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3501 | / 8); | |
1fd400ff TT |
3502 | ++i; |
3503 | ||
2ec9a5e0 TT |
3504 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3505 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3506 | - MAYBE_SWAP (metadata[i])) | |
3507 | / 8); | |
987d643c | 3508 | ++i; |
1fd400ff | 3509 | |
f00a2de2 PA |
3510 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
3511 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3512 | map->address_table | |
3513 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
3514 | ++i; |
3515 | ||
f00a2de2 PA |
3516 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3517 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3518 | map->symbol_table | |
3519 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3520 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3521 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3522 | |
f00a2de2 | 3523 | ++i; |
f9d83a0b | 3524 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3525 | |
2ec9a5e0 TT |
3526 | return 1; |
3527 | } | |
3528 | ||
4485a1c1 SM |
3529 | /* Callback types for dwarf2_read_gdb_index. */ |
3530 | ||
3531 | typedef gdb::function_view | |
3532 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
3533 | get_gdb_index_contents_ftype; | |
3534 | typedef gdb::function_view | |
3535 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
3536 | get_gdb_index_contents_dwz_ftype; | |
3537 | ||
927aa2e7 | 3538 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3539 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3540 | ||
3541 | static int | |
4485a1c1 SM |
3542 | dwarf2_read_gdb_index |
3543 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3544 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3545 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3546 | { |
2ec9a5e0 TT |
3547 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3548 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3549 | struct dwz_file *dwz; |
12359b5e | 3550 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3551 | |
4485a1c1 SM |
3552 | gdb::array_view<const gdb_byte> main_index_contents |
3553 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3554 | ||
3555 | if (main_index_contents.empty ()) | |
3556 | return 0; | |
3557 | ||
3063847f | 3558 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3559 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3560 | use_deprecated_index_sections, | |
3561 | main_index_contents, map.get (), &cu_list, | |
3562 | &cu_list_elements, &types_list, | |
3563 | &types_list_elements)) | |
2ec9a5e0 TT |
3564 | return 0; |
3565 | ||
0fefef59 | 3566 | /* Don't use the index if it's empty. */ |
3063847f | 3567 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3568 | return 0; |
3569 | ||
2ec9a5e0 TT |
3570 | /* If there is a .dwz file, read it so we can get its CU list as |
3571 | well. */ | |
ed2dc618 | 3572 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3573 | if (dwz != NULL) |
2ec9a5e0 | 3574 | { |
2ec9a5e0 TT |
3575 | struct mapped_index dwz_map; |
3576 | const gdb_byte *dwz_types_ignore; | |
3577 | offset_type dwz_types_elements_ignore; | |
3578 | ||
4485a1c1 SM |
3579 | gdb::array_view<const gdb_byte> dwz_index_content |
3580 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3581 | ||
3582 | if (dwz_index_content.empty ()) | |
3583 | return 0; | |
3584 | ||
3585 | if (!read_gdb_index_from_buffer (objfile, | |
3586 | bfd_get_filename (dwz->dwz_bfd), 1, | |
3587 | dwz_index_content, &dwz_map, | |
3588 | &dwz_list, &dwz_list_elements, | |
3589 | &dwz_types_ignore, | |
3590 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3591 | { |
3592 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3593 | bfd_get_filename (dwz->dwz_bfd)); | |
3594 | return 0; | |
3595 | } | |
3596 | } | |
3597 | ||
12359b5e SM |
3598 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3599 | dwz_list, dwz_list_elements); | |
1fd400ff | 3600 | |
8b70b953 TT |
3601 | if (types_list_elements) |
3602 | { | |
8b70b953 TT |
3603 | /* We can only handle a single .debug_types when we have an |
3604 | index. */ | |
fd5866f6 | 3605 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3606 | return 0; |
3607 | ||
fd5866f6 | 3608 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3609 | |
12359b5e SM |
3610 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3611 | types_list, types_list_elements); | |
8b70b953 | 3612 | } |
9291a0cd | 3613 | |
3063847f | 3614 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3615 | |
3063847f | 3616 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3617 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3618 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3619 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3620 | |
3621 | return 1; | |
3622 | } | |
3623 | ||
dee91e82 | 3624 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3625 | |
dee91e82 DE |
3626 | static void |
3627 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3628 | const gdb_byte *info_ptr, |
dee91e82 DE |
3629 | struct die_info *comp_unit_die, |
3630 | int has_children, | |
3631 | void *data) | |
9291a0cd | 3632 | { |
dee91e82 | 3633 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3634 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3635 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3636 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3637 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3638 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3639 | struct attribute *attr; |
dee91e82 | 3640 | int i; |
7b9f3c50 DE |
3641 | void **slot; |
3642 | struct quick_file_names *qfn; | |
9291a0cd | 3643 | |
0186c6a7 DE |
3644 | gdb_assert (! this_cu->is_debug_types); |
3645 | ||
07261596 TT |
3646 | /* Our callers never want to match partial units -- instead they |
3647 | will match the enclosing full CU. */ | |
3648 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3649 | { | |
3650 | this_cu->v.quick->no_file_data = 1; | |
3651 | return; | |
3652 | } | |
3653 | ||
0186c6a7 | 3654 | lh_cu = this_cu; |
7b9f3c50 | 3655 | slot = NULL; |
dee91e82 | 3656 | |
fff8551c | 3657 | line_header_up lh; |
9c541725 | 3658 | sect_offset line_offset {}; |
fff8551c | 3659 | |
dee91e82 | 3660 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3661 | if (attr) |
3662 | { | |
7b9f3c50 DE |
3663 | struct quick_file_names find_entry; |
3664 | ||
9c541725 | 3665 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3666 | |
3667 | /* We may have already read in this line header (TU line header sharing). | |
3668 | If we have we're done. */ | |
094b34ac | 3669 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3670 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3671 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3672 | &find_entry, INSERT); | |
3673 | if (*slot != NULL) | |
3674 | { | |
9a3c8263 | 3675 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3676 | return; |
7b9f3c50 DE |
3677 | } |
3678 | ||
3019eac3 | 3679 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3680 | } |
3681 | if (lh == NULL) | |
3682 | { | |
094b34ac | 3683 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3684 | return; |
9291a0cd TT |
3685 | } |
3686 | ||
8d749320 | 3687 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3688 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3689 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3690 | gdb_assert (slot != NULL); |
3691 | *slot = qfn; | |
9291a0cd | 3692 | |
d721ba37 | 3693 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3694 | |
fff8551c | 3695 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3696 | qfn->file_names = |
fff8551c PA |
3697 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3698 | for (i = 0; i < lh->file_names.size (); ++i) | |
3699 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3700 | qfn->real_names = NULL; |
9291a0cd | 3701 | |
094b34ac | 3702 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3703 | } |
3704 | ||
3705 | /* A helper for the "quick" functions which attempts to read the line | |
3706 | table for THIS_CU. */ | |
3707 | ||
3708 | static struct quick_file_names * | |
e4a48d9d | 3709 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3710 | { |
0186c6a7 DE |
3711 | /* This should never be called for TUs. */ |
3712 | gdb_assert (! this_cu->is_debug_types); | |
3713 | /* Nor type unit groups. */ | |
3714 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3715 | |
dee91e82 DE |
3716 | if (this_cu->v.quick->file_names != NULL) |
3717 | return this_cu->v.quick->file_names; | |
3718 | /* If we know there is no line data, no point in looking again. */ | |
3719 | if (this_cu->v.quick->no_file_data) | |
3720 | return NULL; | |
3721 | ||
0186c6a7 | 3722 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3723 | |
3724 | if (this_cu->v.quick->no_file_data) | |
3725 | return NULL; | |
3726 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3727 | } |
3728 | ||
3729 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3730 | real path for a given file name from the line table. */ |
2fdf6df6 | 3731 | |
9291a0cd | 3732 | static const char * |
7b9f3c50 DE |
3733 | dw2_get_real_path (struct objfile *objfile, |
3734 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3735 | { |
7b9f3c50 DE |
3736 | if (qfn->real_names == NULL) |
3737 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3738 | qfn->num_file_names, const char *); |
9291a0cd | 3739 | |
7b9f3c50 | 3740 | if (qfn->real_names[index] == NULL) |
14278e1f | 3741 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3742 | |
7b9f3c50 | 3743 | return qfn->real_names[index]; |
9291a0cd TT |
3744 | } |
3745 | ||
3746 | static struct symtab * | |
3747 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3748 | { | |
ed2dc618 SM |
3749 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3750 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3751 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3752 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3753 | |
43f3e411 DE |
3754 | if (cust == NULL) |
3755 | return NULL; | |
ed2dc618 | 3756 | |
43f3e411 | 3757 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3758 | } |
3759 | ||
7b9f3c50 DE |
3760 | /* Traversal function for dw2_forget_cached_source_info. */ |
3761 | ||
3762 | static int | |
3763 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3764 | { |
7b9f3c50 | 3765 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3766 | |
7b9f3c50 | 3767 | if (file_data->real_names) |
9291a0cd | 3768 | { |
7b9f3c50 | 3769 | int i; |
9291a0cd | 3770 | |
7b9f3c50 | 3771 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3772 | { |
7b9f3c50 DE |
3773 | xfree ((void*) file_data->real_names[i]); |
3774 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3775 | } |
3776 | } | |
7b9f3c50 DE |
3777 | |
3778 | return 1; | |
3779 | } | |
3780 | ||
3781 | static void | |
3782 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3783 | { | |
ed2dc618 SM |
3784 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3785 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 DE |
3786 | |
3787 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3788 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3789 | } |
3790 | ||
f8eba3c6 TT |
3791 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3792 | the symtabs and calls the iterator. */ | |
3793 | ||
3794 | static int | |
3795 | dw2_map_expand_apply (struct objfile *objfile, | |
3796 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3797 | const char *name, const char *real_path, |
14bc53a8 | 3798 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3799 | { |
43f3e411 | 3800 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3801 | |
3802 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3803 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3804 | return 0; |
3805 | ||
3806 | /* This may expand more than one symtab, and we want to iterate over | |
3807 | all of them. */ | |
58f0c718 | 3808 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3809 | |
14bc53a8 PA |
3810 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3811 | last_made, callback); | |
f8eba3c6 TT |
3812 | } |
3813 | ||
3814 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3815 | ||
14bc53a8 PA |
3816 | static bool |
3817 | dw2_map_symtabs_matching_filename | |
3818 | (struct objfile *objfile, const char *name, const char *real_path, | |
3819 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3820 | { |
c011a4f4 | 3821 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3822 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3823 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3824 | |
848e3e78 DE |
3825 | /* The rule is CUs specify all the files, including those used by |
3826 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3827 | |
b76e467d | 3828 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3829 | { |
3d7bb9d9 | 3830 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3831 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3832 | continue; |
3833 | ||
b76e467d | 3834 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3835 | if (file_data == NULL) |
9291a0cd TT |
3836 | continue; |
3837 | ||
b76e467d | 3838 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3839 | { |
7b9f3c50 | 3840 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3841 | const char *this_real_name; |
9291a0cd | 3842 | |
af529f8f | 3843 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3844 | { |
f5b95b50 | 3845 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3846 | callback)) |
3847 | return true; | |
288e77a7 | 3848 | continue; |
4aac40c8 | 3849 | } |
9291a0cd | 3850 | |
c011a4f4 DE |
3851 | /* Before we invoke realpath, which can get expensive when many |
3852 | files are involved, do a quick comparison of the basenames. */ | |
3853 | if (! basenames_may_differ | |
3854 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3855 | continue; | |
3856 | ||
da235a7c JK |
3857 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3858 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3859 | { |
da235a7c | 3860 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3861 | callback)) |
3862 | return true; | |
288e77a7 | 3863 | continue; |
da235a7c | 3864 | } |
9291a0cd | 3865 | |
da235a7c JK |
3866 | if (real_path != NULL) |
3867 | { | |
af529f8f JK |
3868 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3869 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3870 | if (this_real_name != NULL |
af529f8f | 3871 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3872 | { |
f5b95b50 | 3873 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3874 | callback)) |
3875 | return true; | |
288e77a7 | 3876 | continue; |
9291a0cd TT |
3877 | } |
3878 | } | |
3879 | } | |
3880 | } | |
3881 | ||
14bc53a8 | 3882 | return false; |
9291a0cd TT |
3883 | } |
3884 | ||
da51c347 DE |
3885 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3886 | ||
3887 | struct dw2_symtab_iterator | |
9291a0cd | 3888 | { |
ed2dc618 SM |
3889 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3890 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3891 | /* If set, only look for symbols that match that block. Valid values are |
3892 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3893 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3894 | /* The kind of symbol we're looking for. */ |
3895 | domain_enum domain; | |
3896 | /* The list of CUs from the index entry of the symbol, | |
3897 | or NULL if not found. */ | |
3898 | offset_type *vec; | |
3899 | /* The next element in VEC to look at. */ | |
3900 | int next; | |
3901 | /* The number of elements in VEC, or zero if there is no match. */ | |
3902 | int length; | |
8943b874 DE |
3903 | /* Have we seen a global version of the symbol? |
3904 | If so we can ignore all further global instances. | |
3905 | This is to work around gold/15646, inefficient gold-generated | |
3906 | indices. */ | |
3907 | int global_seen; | |
da51c347 | 3908 | }; |
9291a0cd | 3909 | |
2b79f376 | 3910 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3911 | |
9291a0cd | 3912 | static void |
da51c347 | 3913 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3914 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3915 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3916 | domain_enum domain, |
3917 | const char *name) | |
3918 | { | |
ed2dc618 | 3919 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3920 | iter->block_index = block_index; |
3921 | iter->domain = domain; | |
3922 | iter->next = 0; | |
8943b874 | 3923 | iter->global_seen = 0; |
da51c347 | 3924 | |
3063847f | 3925 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3926 | |
3927 | /* index is NULL if OBJF_READNOW. */ | |
3928 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3929 | iter->length = MAYBE_SWAP (*iter->vec); |
3930 | else | |
3931 | { | |
3932 | iter->vec = NULL; | |
3933 | iter->length = 0; | |
3934 | } | |
3935 | } | |
3936 | ||
3937 | /* Return the next matching CU or NULL if there are no more. */ | |
3938 | ||
3939 | static struct dwarf2_per_cu_data * | |
3940 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3941 | { | |
ed2dc618 SM |
3942 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3943 | ||
da51c347 DE |
3944 | for ( ; iter->next < iter->length; ++iter->next) |
3945 | { | |
3946 | offset_type cu_index_and_attrs = | |
3947 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3948 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3949 | gdb_index_symbol_kind symbol_kind = |
3950 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3951 | /* Only check the symbol attributes if they're present. | |
3952 | Indices prior to version 7 don't record them, | |
3953 | and indices >= 7 may elide them for certain symbols | |
3954 | (gold does this). */ | |
3955 | int attrs_valid = | |
ed2dc618 | 3956 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3957 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3958 | ||
3190f0c6 | 3959 | /* Don't crash on bad data. */ |
b76e467d | 3960 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3961 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3962 | { |
b98664d3 | 3963 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3964 | " [in module %s]"), |
3965 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3966 | continue; |
3967 | } | |
3968 | ||
ff4c9fec | 3969 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3970 | |
da51c347 | 3971 | /* Skip if already read in. */ |
43f3e411 | 3972 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3973 | continue; |
3974 | ||
8943b874 DE |
3975 | /* Check static vs global. */ |
3976 | if (attrs_valid) | |
3977 | { | |
2b79f376 SM |
3978 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3979 | ||
3980 | if (iter->block_index.has_value ()) | |
3981 | { | |
3982 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3983 | ||
3984 | if (is_static != want_static) | |
3985 | continue; | |
3986 | } | |
3987 | ||
8943b874 DE |
3988 | /* Work around gold/15646. */ |
3989 | if (!is_static && iter->global_seen) | |
3990 | continue; | |
3991 | if (!is_static) | |
3992 | iter->global_seen = 1; | |
3993 | } | |
da51c347 DE |
3994 | |
3995 | /* Only check the symbol's kind if it has one. */ | |
3996 | if (attrs_valid) | |
3997 | { | |
3998 | switch (iter->domain) | |
3999 | { | |
4000 | case VAR_DOMAIN: | |
4001 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
4002 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
4003 | /* Some types are also in VAR_DOMAIN. */ | |
4004 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4005 | continue; | |
4006 | break; | |
4007 | case STRUCT_DOMAIN: | |
4008 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4009 | continue; | |
4010 | break; | |
4011 | case LABEL_DOMAIN: | |
4012 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4013 | continue; | |
4014 | break; | |
4015 | default: | |
4016 | break; | |
4017 | } | |
4018 | } | |
4019 | ||
4020 | ++iter->next; | |
4021 | return per_cu; | |
4022 | } | |
4023 | ||
4024 | return NULL; | |
4025 | } | |
4026 | ||
43f3e411 | 4027 | static struct compunit_symtab * |
c7f839cb | 4028 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 4029 | const char *name, domain_enum domain) |
9291a0cd | 4030 | { |
43f3e411 | 4031 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
4032 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4033 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 4034 | |
b5ec771e PA |
4035 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
4036 | ||
ed2dc618 SM |
4037 | struct dw2_symtab_iterator iter; |
4038 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4039 | |
2b79f376 | 4040 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 4041 | |
ed2dc618 SM |
4042 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
4043 | { | |
4044 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 4045 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 4046 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 4047 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 4048 | |
ed2dc618 SM |
4049 | sym = block_find_symbol (block, name, domain, |
4050 | block_find_non_opaque_type_preferred, | |
4051 | &with_opaque); | |
b2e2f908 | 4052 | |
ed2dc618 SM |
4053 | /* Some caution must be observed with overloaded functions |
4054 | and methods, since the index will not contain any overload | |
4055 | information (but NAME might contain it). */ | |
da51c347 | 4056 | |
ed2dc618 SM |
4057 | if (sym != NULL |
4058 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
4059 | return stab; | |
4060 | if (with_opaque != NULL | |
4061 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
4062 | stab_best = stab; | |
da51c347 | 4063 | |
ed2dc618 | 4064 | /* Keep looking through other CUs. */ |
9291a0cd | 4065 | } |
9291a0cd | 4066 | |
da51c347 | 4067 | return stab_best; |
9291a0cd TT |
4068 | } |
4069 | ||
4070 | static void | |
4071 | dw2_print_stats (struct objfile *objfile) | |
4072 | { | |
ed2dc618 SM |
4073 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4074 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4075 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4076 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 4077 | int count = 0; |
9291a0cd | 4078 | |
ed2dc618 | 4079 | for (int i = 0; i < total; ++i) |
9291a0cd | 4080 | { |
ff4c9fec | 4081 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4082 | |
43f3e411 | 4083 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4084 | ++count; |
4085 | } | |
e4a48d9d | 4086 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
4087 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
4088 | } | |
4089 | ||
779bd270 DE |
4090 | /* This dumps minimal information about the index. |
4091 | It is called via "mt print objfiles". | |
4092 | One use is to verify .gdb_index has been loaded by the | |
4093 | gdb.dwarf2/gdb-index.exp testcase. */ | |
4094 | ||
9291a0cd TT |
4095 | static void |
4096 | dw2_dump (struct objfile *objfile) | |
4097 | { | |
ed2dc618 SM |
4098 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4099 | = get_dwarf2_per_objfile (objfile); | |
4100 | ||
779bd270 DE |
4101 | gdb_assert (dwarf2_per_objfile->using_index); |
4102 | printf_filtered (".gdb_index:"); | |
4103 | if (dwarf2_per_objfile->index_table != NULL) | |
4104 | { | |
4105 | printf_filtered (" version %d\n", | |
4106 | dwarf2_per_objfile->index_table->version); | |
4107 | } | |
4108 | else | |
4109 | printf_filtered (" faked for \"readnow\"\n"); | |
4110 | printf_filtered ("\n"); | |
9291a0cd TT |
4111 | } |
4112 | ||
9291a0cd TT |
4113 | static void |
4114 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4115 | const char *func_name) | |
4116 | { | |
ed2dc618 SM |
4117 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4118 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 4119 | |
ed2dc618 SM |
4120 | struct dw2_symtab_iterator iter; |
4121 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4122 | |
2b79f376 | 4123 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 4124 | |
ed2dc618 | 4125 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 4126 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 4127 | |
9291a0cd TT |
4128 | } |
4129 | ||
4130 | static void | |
4131 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4132 | { | |
ed2dc618 SM |
4133 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4134 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4135 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4136 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 4137 | |
ed2dc618 | 4138 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 4139 | { |
ff4c9fec | 4140 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4141 | |
58f0c718 TT |
4142 | /* We don't want to directly expand a partial CU, because if we |
4143 | read it with the wrong language, then assertion failures can | |
4144 | be triggered later on. See PR symtab/23010. So, tell | |
4145 | dw2_instantiate_symtab to skip partial CUs -- any important | |
4146 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
4147 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
4148 | } |
4149 | } | |
4150 | ||
4151 | static void | |
652a8996 JK |
4152 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4153 | const char *fullname) | |
9291a0cd | 4154 | { |
ed2dc618 SM |
4155 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4156 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
4157 | |
4158 | /* We don't need to consider type units here. | |
4159 | This is only called for examining code, e.g. expand_line_sal. | |
4160 | There can be an order of magnitude (or more) more type units | |
4161 | than comp units, and we avoid them if we can. */ | |
4162 | ||
b76e467d | 4163 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 4164 | { |
3d7bb9d9 | 4165 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4166 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4167 | continue; |
4168 | ||
b76e467d | 4169 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4170 | if (file_data == NULL) |
9291a0cd TT |
4171 | continue; |
4172 | ||
b76e467d | 4173 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4174 | { |
652a8996 JK |
4175 | const char *this_fullname = file_data->file_names[j]; |
4176 | ||
4177 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4178 | { |
58f0c718 | 4179 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
4180 | break; |
4181 | } | |
4182 | } | |
4183 | } | |
4184 | } | |
4185 | ||
9291a0cd | 4186 | static void |
199b4314 TT |
4187 | dw2_map_matching_symbols |
4188 | (struct objfile *objfile, | |
b054970d | 4189 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
4190 | int global, |
4191 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 4192 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4193 | { |
40658b94 | 4194 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4195 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4196 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4197 | } |
4198 | ||
b5ec771e PA |
4199 | /* Symbol name matcher for .gdb_index names. |
4200 | ||
4201 | Symbol names in .gdb_index have a few particularities: | |
4202 | ||
4203 | - There's no indication of which is the language of each symbol. | |
4204 | ||
4205 | Since each language has its own symbol name matching algorithm, | |
4206 | and we don't know which language is the right one, we must match | |
3f563c84 PA |
4207 | each symbol against all languages. This would be a potential |
4208 | performance problem if it were not mitigated by the | |
4209 | mapped_index::name_components lookup table, which significantly | |
4210 | reduces the number of times we need to call into this matcher, | |
4211 | making it a non-issue. | |
b5ec771e PA |
4212 | |
4213 | - Symbol names in the index have no overload (parameter) | |
4214 | information. I.e., in C++, "foo(int)" and "foo(long)" both | |
4215 | appear as "foo" in the index, for example. | |
4216 | ||
4217 | This means that the lookup names passed to the symbol name | |
4218 | matcher functions must have no parameter information either | |
4219 | because (e.g.) symbol search name "foo" does not match | |
4220 | lookup-name "foo(int)" [while swapping search name for lookup | |
4221 | name would match]. | |
4222 | */ | |
4223 | class gdb_index_symbol_name_matcher | |
4224 | { | |
4225 | public: | |
4226 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ | |
4227 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); | |
4228 | ||
4229 | /* Walk all the matcher routines and match SYMBOL_NAME against them. | |
4230 | Returns true if any matcher matches. */ | |
4231 | bool matches (const char *symbol_name); | |
4232 | ||
4233 | private: | |
4234 | /* A reference to the lookup name we're matching against. */ | |
4235 | const lookup_name_info &m_lookup_name; | |
4236 | ||
4237 | /* A vector holding all the different symbol name matchers, for all | |
4238 | languages. */ | |
4239 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; | |
4240 | }; | |
4241 | ||
4242 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher | |
4243 | (const lookup_name_info &lookup_name) | |
4244 | : m_lookup_name (lookup_name) | |
4245 | { | |
4246 | /* Prepare the vector of comparison functions upfront, to avoid | |
4247 | doing the same work for each symbol. Care is taken to avoid | |
4248 | matching with the same matcher more than once if/when multiple | |
4249 | languages use the same matcher function. */ | |
4250 | auto &matchers = m_symbol_name_matcher_funcs; | |
4251 | matchers.reserve (nr_languages); | |
4252 | ||
4253 | matchers.push_back (default_symbol_name_matcher); | |
4254 | ||
4255 | for (int i = 0; i < nr_languages; i++) | |
4256 | { | |
4257 | const language_defn *lang = language_def ((enum language) i); | |
c63d3e8d | 4258 | symbol_name_matcher_ftype *name_matcher |
618daa93 | 4259 | = get_symbol_name_matcher (lang, m_lookup_name); |
c63d3e8d PA |
4260 | |
4261 | /* Don't insert the same comparison routine more than once. | |
4262 | Note that we do this linear walk instead of a seemingly | |
4263 | cheaper sorted insert, or use a std::set or something like | |
4264 | that, because relative order of function addresses is not | |
4265 | stable. This is not a problem in practice because the number | |
4266 | of supported languages is low, and the cost here is tiny | |
4267 | compared to the number of searches we'll do afterwards using | |
4268 | this object. */ | |
4269 | if (name_matcher != default_symbol_name_matcher | |
4270 | && (std::find (matchers.begin (), matchers.end (), name_matcher) | |
4271 | == matchers.end ())) | |
4272 | matchers.push_back (name_matcher); | |
b5ec771e PA |
4273 | } |
4274 | } | |
4275 | ||
4276 | bool | |
4277 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) | |
4278 | { | |
4279 | for (auto matches_name : m_symbol_name_matcher_funcs) | |
4280 | if (matches_name (symbol_name, m_lookup_name, NULL)) | |
4281 | return true; | |
4282 | ||
4283 | return false; | |
4284 | } | |
4285 | ||
e1ef7d7a PA |
4286 | /* Starting from a search name, return the string that finds the upper |
4287 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4288 | list. Returns the empty string to indicate that the upper bound is | |
4289 | the end of the list. */ | |
4290 | ||
4291 | static std::string | |
4292 | make_sort_after_prefix_name (const char *search_name) | |
4293 | { | |
4294 | /* When looking to complete "func", we find the upper bound of all | |
4295 | symbols that start with "func" by looking for where we'd insert | |
4296 | the closest string that would follow "func" in lexicographical | |
4297 | order. Usually, that's "func"-with-last-character-incremented, | |
4298 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4299 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4300 | Especially mind the 0xff character, which is a valid character in | |
4301 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4302 | rule out compilers allowing it in identifiers. Note that | |
4303 | conveniently, strcmp/strcasecmp are specified to compare | |
4304 | characters interpreted as unsigned char. So what we do is treat | |
4305 | the whole string as a base 256 number composed of a sequence of | |
4306 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4307 | to 0, and carries 1 to the following more-significant position. | |
4308 | If the very first character in SEARCH_NAME ends up incremented | |
4309 | and carries/overflows, then the upper bound is the end of the | |
4310 | list. The string after the empty string is also the empty | |
4311 | string. | |
4312 | ||
4313 | Some examples of this operation: | |
4314 | ||
4315 | SEARCH_NAME => "+1" RESULT | |
4316 | ||
4317 | "abc" => "abd" | |
4318 | "ab\xff" => "ac" | |
4319 | "\xff" "a" "\xff" => "\xff" "b" | |
4320 | "\xff" => "" | |
4321 | "\xff\xff" => "" | |
4322 | "" => "" | |
4323 | ||
4324 | Then, with these symbols for example: | |
4325 | ||
4326 | func | |
4327 | func1 | |
4328 | fund | |
4329 | ||
4330 | completing "func" looks for symbols between "func" and | |
4331 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4332 | which finds "func" and "func1", but not "fund". | |
4333 | ||
4334 | And with: | |
4335 | ||
4336 | funcÿ (Latin1 'ÿ' [0xff]) | |
4337 | funcÿ1 | |
4338 | fund | |
4339 | ||
4340 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4341 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4342 | ||
4343 | And with: | |
4344 | ||
4345 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4346 | ÿÿ1 | |
4347 | ||
4348 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4349 | the end of the list. | |
4350 | */ | |
4351 | std::string after = search_name; | |
4352 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4353 | after.pop_back (); | |
4354 | if (!after.empty ()) | |
4355 | after.back () = (unsigned char) after.back () + 1; | |
4356 | return after; | |
4357 | } | |
4358 | ||
5c58de74 | 4359 | /* See declaration. */ |
61d96d7e | 4360 | |
5c58de74 PA |
4361 | std::pair<std::vector<name_component>::const_iterator, |
4362 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 4363 | mapped_index_base::find_name_components_bounds |
5c58de74 | 4364 | (const lookup_name_info &lookup_name_without_params) const |
3f563c84 | 4365 | { |
5c58de74 PA |
4366 | auto *name_cmp |
4367 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 PA |
4368 | |
4369 | const char *cplus | |
c62446b1 | 4370 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
9291a0cd | 4371 | |
3f563c84 PA |
4372 | /* Comparison function object for lower_bound that matches against a |
4373 | given symbol name. */ | |
4374 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4375 | const char *name) | |
4376 | { | |
5c58de74 | 4377 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4378 | const char *elem_name = elem_qualified + elem.name_offset; |
4379 | return name_cmp (elem_name, name) < 0; | |
4380 | }; | |
4381 | ||
4382 | /* Comparison function object for upper_bound that matches against a | |
4383 | given symbol name. */ | |
4384 | auto lookup_compare_upper = [&] (const char *name, | |
4385 | const name_component &elem) | |
4386 | { | |
5c58de74 | 4387 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4388 | const char *elem_name = elem_qualified + elem.name_offset; |
4389 | return name_cmp (name, elem_name) < 0; | |
4390 | }; | |
4391 | ||
5c58de74 PA |
4392 | auto begin = this->name_components.begin (); |
4393 | auto end = this->name_components.end (); | |
3f563c84 PA |
4394 | |
4395 | /* Find the lower bound. */ | |
4396 | auto lower = [&] () | |
4397 | { | |
5c58de74 | 4398 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
3f563c84 PA |
4399 | return begin; |
4400 | else | |
4401 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); | |
4402 | } (); | |
4403 | ||
4404 | /* Find the upper bound. */ | |
4405 | auto upper = [&] () | |
4406 | { | |
5c58de74 | 4407 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4408 | { |
e1ef7d7a PA |
4409 | /* In completion mode, we want UPPER to point past all |
4410 | symbols names that have the same prefix. I.e., with | |
4411 | these symbols, and completing "func": | |
4412 | ||
4413 | function << lower bound | |
4414 | function1 | |
4415 | other_function << upper bound | |
4416 | ||
4417 | We find the upper bound by looking for the insertion | |
4418 | point of "func"-with-last-character-incremented, | |
4419 | i.e. "fund". */ | |
4420 | std::string after = make_sort_after_prefix_name (cplus); | |
4421 | if (after.empty ()) | |
3f563c84 | 4422 | return end; |
e6b2f5ef PA |
4423 | return std::lower_bound (lower, end, after.c_str (), |
4424 | lookup_compare_lower); | |
3f563c84 PA |
4425 | } |
4426 | else | |
4427 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); | |
4428 | } (); | |
4429 | ||
5c58de74 PA |
4430 | return {lower, upper}; |
4431 | } | |
4432 | ||
4433 | /* See declaration. */ | |
4434 | ||
4435 | void | |
44ed8f3e | 4436 | mapped_index_base::build_name_components () |
5c58de74 PA |
4437 | { |
4438 | if (!this->name_components.empty ()) | |
4439 | return; | |
4440 | ||
4441 | this->name_components_casing = case_sensitivity; | |
4442 | auto *name_cmp | |
4443 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4444 | ||
4445 | /* The code below only knows how to break apart components of C++ | |
4446 | symbol names (and other languages that use '::' as | |
4447 | namespace/module separator). If we add support for wild matching | |
4448 | to some language that uses some other operator (E.g., Ada, Go and | |
4449 | D use '.'), then we'll need to try splitting the symbol name | |
4450 | according to that language too. Note that Ada does support wild | |
4451 | matching, but doesn't currently support .gdb_index. */ | |
44ed8f3e PA |
4452 | auto count = this->symbol_name_count (); |
4453 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 4454 | { |
44ed8f3e | 4455 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
4456 | continue; |
4457 | ||
4458 | const char *name = this->symbol_name_at (idx); | |
4459 | ||
4460 | /* Add each name component to the name component table. */ | |
4461 | unsigned int previous_len = 0; | |
4462 | for (unsigned int current_len = cp_find_first_component (name); | |
4463 | name[current_len] != '\0'; | |
4464 | current_len += cp_find_first_component (name + current_len)) | |
4465 | { | |
4466 | gdb_assert (name[current_len] == ':'); | |
4467 | this->name_components.push_back ({previous_len, idx}); | |
4468 | /* Skip the '::'. */ | |
4469 | current_len += 2; | |
4470 | previous_len = current_len; | |
4471 | } | |
4472 | this->name_components.push_back ({previous_len, idx}); | |
4473 | } | |
4474 | ||
4475 | /* Sort name_components elements by name. */ | |
4476 | auto name_comp_compare = [&] (const name_component &left, | |
4477 | const name_component &right) | |
4478 | { | |
4479 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4480 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4481 | ||
4482 | const char *left_name = left_qualified + left.name_offset; | |
4483 | const char *right_name = right_qualified + right.name_offset; | |
4484 | ||
4485 | return name_cmp (left_name, right_name) < 0; | |
4486 | }; | |
4487 | ||
4488 | std::sort (this->name_components.begin (), | |
4489 | this->name_components.end (), | |
4490 | name_comp_compare); | |
4491 | } | |
4492 | ||
4493 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
4494 | mapped_index_base instead of the containing objfile. This is split |
4495 | to a separate function in order to be able to unit test the | |
4496 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 4497 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 4498 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
4499 | |
4500 | static void | |
4501 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 4502 | (mapped_index_base &index, |
5c58de74 PA |
4503 | const lookup_name_info &lookup_name_in, |
4504 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4505 | enum search_domain kind, | |
4506 | gdb::function_view<void (offset_type)> match_callback) | |
4507 | { | |
4508 | lookup_name_info lookup_name_without_params | |
4509 | = lookup_name_in.make_ignore_params (); | |
4510 | gdb_index_symbol_name_matcher lookup_name_matcher | |
4511 | (lookup_name_without_params); | |
4512 | ||
4513 | /* Build the symbol name component sorted vector, if we haven't | |
4514 | yet. */ | |
4515 | index.build_name_components (); | |
4516 | ||
4517 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); | |
4518 | ||
3f563c84 PA |
4519 | /* Now for each symbol name in range, check to see if we have a name |
4520 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4521 | ||
4522 | /* The same symbol may appear more than once in the range though. | |
4523 | E.g., if we're looking for symbols that complete "w", and we have | |
4524 | a symbol named "w1::w2", we'll find the two name components for | |
4525 | that same symbol in the range. To be sure we only call the | |
4526 | callback once per symbol, we first collect the symbol name | |
4527 | indexes that matched in a temporary vector and ignore | |
4528 | duplicates. */ | |
4529 | std::vector<offset_type> matches; | |
5c58de74 | 4530 | matches.reserve (std::distance (bounds.first, bounds.second)); |
3f563c84 | 4531 | |
5c58de74 | 4532 | for (; bounds.first != bounds.second; ++bounds.first) |
3f563c84 | 4533 | { |
5c58de74 | 4534 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
3f563c84 PA |
4535 | |
4536 | if (!lookup_name_matcher.matches (qualified) | |
4537 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
9291a0cd TT |
4538 | continue; |
4539 | ||
5c58de74 | 4540 | matches.push_back (bounds.first->idx); |
3f563c84 PA |
4541 | } |
4542 | ||
4543 | std::sort (matches.begin (), matches.end ()); | |
4544 | ||
4545 | /* Finally call the callback, once per match. */ | |
4546 | ULONGEST prev = -1; | |
4547 | for (offset_type idx : matches) | |
4548 | { | |
4549 | if (prev != idx) | |
4550 | { | |
4551 | match_callback (idx); | |
4552 | prev = idx; | |
4553 | } | |
4554 | } | |
4555 | ||
4556 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4557 | (offset_type)-1 are both possible values. */ | |
4558 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4559 | } | |
4560 | ||
c62446b1 PA |
4561 | #if GDB_SELF_TEST |
4562 | ||
4563 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4564 | ||
a3c5fafd PA |
4565 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4566 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4567 | mapped_index_base interface. Builds an index from the symbol list | |
4568 | passed as parameter to the constructor. */ | |
4569 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4570 | { |
4571 | public: | |
a3c5fafd PA |
4572 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4573 | : m_symbol_table (symbols) | |
c62446b1 PA |
4574 | {} |
4575 | ||
a3c5fafd | 4576 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4577 | |
a3c5fafd | 4578 | /* Return the number of names in the symbol table. */ |
632e107b | 4579 | size_t symbol_name_count () const override |
c62446b1 | 4580 | { |
a3c5fafd | 4581 | return m_symbol_table.size (); |
c62446b1 PA |
4582 | } |
4583 | ||
a3c5fafd | 4584 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4585 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4586 | { |
4587 | return m_symbol_table[idx]; | |
4588 | } | |
c62446b1 | 4589 | |
a3c5fafd PA |
4590 | private: |
4591 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4592 | }; |
4593 | ||
4594 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4595 | string, to pass to print routines. */ | |
4596 | ||
4597 | static const char * | |
4598 | string_or_null (const char *str) | |
4599 | { | |
4600 | return str != NULL ? str : "<null>"; | |
4601 | } | |
4602 | ||
4603 | /* Check if a lookup_name_info built from | |
4604 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4605 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4606 | matching order. If no match expected, then an empty list is | |
4607 | specified. Returns true on success. On failure prints a warning | |
4608 | indicating the file:line that failed, and returns false. */ | |
4609 | ||
4610 | static bool | |
4611 | check_match (const char *file, int line, | |
4612 | mock_mapped_index &mock_index, | |
4613 | const char *name, symbol_name_match_type match_type, | |
4614 | bool completion_mode, | |
4615 | std::initializer_list<const char *> expected_list) | |
4616 | { | |
4617 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4618 | ||
4619 | bool matched = true; | |
4620 | ||
4621 | auto mismatch = [&] (const char *expected_str, | |
4622 | const char *got) | |
4623 | { | |
4624 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4625 | "expected=\"%s\", got=\"%s\"\n"), | |
4626 | file, line, | |
4627 | (match_type == symbol_name_match_type::FULL | |
4628 | ? "FULL" : "WILD"), | |
4629 | name, string_or_null (expected_str), string_or_null (got)); | |
4630 | matched = false; | |
4631 | }; | |
4632 | ||
4633 | auto expected_it = expected_list.begin (); | |
4634 | auto expected_end = expected_list.end (); | |
4635 | ||
a3c5fafd | 4636 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4637 | NULL, ALL_DOMAIN, |
4638 | [&] (offset_type idx) | |
4639 | { | |
a3c5fafd | 4640 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4641 | const char *expected_str |
4642 | = expected_it == expected_end ? NULL : *expected_it++; | |
4643 | ||
4644 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4645 | mismatch (expected_str, matched_name); | |
4646 | }); | |
4647 | ||
4648 | const char *expected_str | |
4649 | = expected_it == expected_end ? NULL : *expected_it++; | |
4650 | if (expected_str != NULL) | |
4651 | mismatch (expected_str, NULL); | |
4652 | ||
4653 | return matched; | |
4654 | } | |
4655 | ||
4656 | /* The symbols added to the mock mapped_index for testing (in | |
4657 | canonical form). */ | |
4658 | static const char *test_symbols[] = { | |
4659 | "function", | |
4660 | "std::bar", | |
4661 | "std::zfunction", | |
4662 | "std::zfunction2", | |
4663 | "w1::w2", | |
4664 | "ns::foo<char*>", | |
4665 | "ns::foo<int>", | |
4666 | "ns::foo<long>", | |
a20714ff PA |
4667 | "ns2::tmpl<int>::foo2", |
4668 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4669 | |
e1ef7d7a PA |
4670 | /* These are used to check that the increment-last-char in the |
4671 | matching algorithm for completion doesn't match "t1_fund" when | |
4672 | completing "t1_func". */ | |
4673 | "t1_func", | |
4674 | "t1_func1", | |
4675 | "t1_fund", | |
4676 | "t1_fund1", | |
4677 | ||
4678 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4679 | cp-name-parser understands this as a single identifier ("função" | |
4680 | is "function" in PT). */ | |
4681 | u8"u8função", | |
4682 | ||
4683 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4684 | "yfunc\377", | |
4685 | ||
4686 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4687 | "\377", | |
4688 | "\377\377123", | |
4689 | ||
c62446b1 PA |
4690 | /* A name with all sorts of complications. Starts with "z" to make |
4691 | it easier for the completion tests below. */ | |
4692 | #define Z_SYM_NAME \ | |
4693 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4694 | "::tuple<(anonymous namespace)::ui*, " \ | |
4695 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4696 | ||
4697 | Z_SYM_NAME | |
4698 | }; | |
4699 | ||
a3c5fafd PA |
4700 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4701 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4702 | in completion mode. */ | |
5c58de74 PA |
4703 | |
4704 | static bool | |
a3c5fafd | 4705 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4706 | const char *search_name, |
4707 | gdb::array_view<const char *> expected_syms) | |
4708 | { | |
4709 | lookup_name_info lookup_name (search_name, | |
4710 | symbol_name_match_type::FULL, true); | |
4711 | ||
4712 | auto bounds = index.find_name_components_bounds (lookup_name); | |
4713 | ||
4714 | size_t distance = std::distance (bounds.first, bounds.second); | |
4715 | if (distance != expected_syms.size ()) | |
4716 | return false; | |
4717 | ||
4718 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4719 | { | |
4720 | auto nc_elem = bounds.first + exp_elem; | |
4721 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4722 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4723 | return false; | |
4724 | } | |
4725 | ||
4726 | return true; | |
4727 | } | |
4728 | ||
4729 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4730 | method. */ | |
4731 | ||
c62446b1 | 4732 | static void |
5c58de74 PA |
4733 | test_mapped_index_find_name_component_bounds () |
4734 | { | |
4735 | mock_mapped_index mock_index (test_symbols); | |
4736 | ||
a3c5fafd | 4737 | mock_index.build_name_components (); |
5c58de74 PA |
4738 | |
4739 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4740 | method in completion mode. */ | |
4741 | { | |
4742 | static const char *expected_syms[] = { | |
4743 | "t1_func", | |
4744 | "t1_func1", | |
5c58de74 PA |
4745 | }; |
4746 | ||
a3c5fafd | 4747 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4748 | "t1_func", expected_syms)); |
4749 | } | |
4750 | ||
4751 | /* Check that the increment-last-char in the name matching algorithm | |
4752 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4753 | { | |
4754 | static const char *expected_syms1[] = { | |
4755 | "\377", | |
4756 | "\377\377123", | |
4757 | }; | |
a3c5fafd | 4758 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4759 | "\377", expected_syms1)); |
4760 | ||
4761 | static const char *expected_syms2[] = { | |
4762 | "\377\377123", | |
4763 | }; | |
a3c5fafd | 4764 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4765 | "\377\377", expected_syms2)); |
4766 | } | |
4767 | } | |
4768 | ||
4769 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4770 | ||
4771 | static void | |
4772 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4773 | { |
4774 | mock_mapped_index mock_index (test_symbols); | |
4775 | ||
4776 | /* We let all tests run until the end even if some fails, for debug | |
4777 | convenience. */ | |
4778 | bool any_mismatch = false; | |
4779 | ||
4780 | /* Create the expected symbols list (an initializer_list). Needed | |
4781 | because lists have commas, and we need to pass them to CHECK, | |
4782 | which is a macro. */ | |
4783 | #define EXPECT(...) { __VA_ARGS__ } | |
4784 | ||
4785 | /* Wrapper for check_match that passes down the current | |
4786 | __FILE__/__LINE__. */ | |
4787 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4788 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4789 | mock_index, \ | |
4790 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4791 | EXPECTED_LIST) | |
4792 | ||
4793 | /* Identity checks. */ | |
4794 | for (const char *sym : test_symbols) | |
4795 | { | |
4796 | /* Should be able to match all existing symbols. */ | |
4797 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4798 | EXPECT (sym)); | |
4799 | ||
4800 | /* Should be able to match all existing symbols with | |
4801 | parameters. */ | |
4802 | std::string with_params = std::string (sym) + "(int)"; | |
4803 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4804 | EXPECT (sym)); | |
4805 | ||
4806 | /* Should be able to match all existing symbols with | |
4807 | parameters and qualifiers. */ | |
4808 | with_params = std::string (sym) + " ( int ) const"; | |
4809 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4810 | EXPECT (sym)); | |
4811 | ||
4812 | /* This should really find sym, but cp-name-parser.y doesn't | |
4813 | know about lvalue/rvalue qualifiers yet. */ | |
4814 | with_params = std::string (sym) + " ( int ) &&"; | |
4815 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4816 | {}); | |
4817 | } | |
4818 | ||
e1ef7d7a PA |
4819 | /* Check that the name matching algorithm for completion doesn't get |
4820 | confused with Latin1 'ÿ' / 0xff. */ | |
4821 | { | |
4822 | static const char str[] = "\377"; | |
4823 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4824 | EXPECT ("\377", "\377\377123")); | |
4825 | } | |
4826 | ||
4827 | /* Check that the increment-last-char in the matching algorithm for | |
4828 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4829 | { | |
4830 | static const char str[] = "t1_func"; | |
4831 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4832 | EXPECT ("t1_func", "t1_func1")); | |
4833 | } | |
4834 | ||
c62446b1 PA |
4835 | /* Check that completion mode works at each prefix of the expected |
4836 | symbol name. */ | |
4837 | { | |
4838 | static const char str[] = "function(int)"; | |
4839 | size_t len = strlen (str); | |
4840 | std::string lookup; | |
4841 | ||
4842 | for (size_t i = 1; i < len; i++) | |
4843 | { | |
4844 | lookup.assign (str, i); | |
4845 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4846 | EXPECT ("function")); | |
4847 | } | |
4848 | } | |
4849 | ||
4850 | /* While "w" is a prefix of both components, the match function | |
4851 | should still only be called once. */ | |
4852 | { | |
4853 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4854 | EXPECT ("w1::w2")); | |
a20714ff PA |
4855 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4856 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4857 | } |
4858 | ||
4859 | /* Same, with a "complicated" symbol. */ | |
4860 | { | |
4861 | static const char str[] = Z_SYM_NAME; | |
4862 | size_t len = strlen (str); | |
4863 | std::string lookup; | |
4864 | ||
4865 | for (size_t i = 1; i < len; i++) | |
4866 | { | |
4867 | lookup.assign (str, i); | |
4868 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4869 | EXPECT (Z_SYM_NAME)); | |
4870 | } | |
4871 | } | |
4872 | ||
4873 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4874 | { | |
4875 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4876 | {}); | |
4877 | } | |
4878 | ||
4879 | /* A complete symbol with parameters matches any overload, since the | |
4880 | index has no overload info. */ | |
4881 | { | |
4882 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4883 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4884 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4885 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4886 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4887 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4888 | } |
4889 | ||
4890 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4891 | template argument list. */ | |
4892 | { | |
4893 | static const char expected[] = "ns::foo<int>"; | |
4894 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4895 | EXPECT (expected)); | |
a20714ff PA |
4896 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4897 | EXPECT (expected)); | |
c62446b1 PA |
4898 | } |
4899 | ||
4900 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4901 | template argument list that includes a pointer. */ | |
4902 | { | |
4903 | static const char expected[] = "ns::foo<char*>"; | |
4904 | /* Try both completion and non-completion modes. */ | |
4905 | static const bool completion_mode[2] = {false, true}; | |
4906 | for (size_t i = 0; i < 2; i++) | |
4907 | { | |
4908 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4909 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4910 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4911 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4912 | |
4913 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4914 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4915 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4916 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4917 | } |
4918 | } | |
4919 | ||
4920 | { | |
4921 | /* Check method qualifiers are ignored. */ | |
4922 | static const char expected[] = "ns::foo<char*>"; | |
4923 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4924 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4925 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4926 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4927 | CHECK_MATCH ("foo < char * > ( int ) const", |
4928 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4929 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4930 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4931 | } |
4932 | ||
4933 | /* Test lookup names that don't match anything. */ | |
4934 | { | |
a20714ff PA |
4935 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4936 | {}); | |
4937 | ||
c62446b1 PA |
4938 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4939 | {}); | |
4940 | } | |
4941 | ||
a20714ff PA |
4942 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4943 | which should not be confused with a parameter list. */ | |
4944 | { | |
4945 | static const char *syms[] = { | |
4946 | "A::B::C", | |
4947 | "B::C", | |
4948 | "C", | |
4949 | "A :: B :: C ( int )", | |
4950 | "B :: C ( int )", | |
4951 | "C ( int )", | |
4952 | }; | |
4953 | ||
4954 | for (const char *s : syms) | |
4955 | { | |
4956 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4957 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4958 | } | |
4959 | } | |
4960 | ||
4961 | { | |
4962 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4963 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4964 | EXPECT (expected)); | |
4965 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4966 | EXPECT (expected)); | |
4967 | } | |
4968 | ||
c62446b1 PA |
4969 | SELF_CHECK (!any_mismatch); |
4970 | ||
4971 | #undef EXPECT | |
4972 | #undef CHECK_MATCH | |
4973 | } | |
4974 | ||
5c58de74 PA |
4975 | static void |
4976 | run_test () | |
4977 | { | |
4978 | test_mapped_index_find_name_component_bounds (); | |
4979 | test_dw2_expand_symtabs_matching_symbol (); | |
4980 | } | |
4981 | ||
c62446b1 PA |
4982 | }} // namespace selftests::dw2_expand_symtabs_matching |
4983 | ||
4984 | #endif /* GDB_SELF_TEST */ | |
4985 | ||
4b514bc8 JK |
4986 | /* If FILE_MATCHER is NULL or if PER_CU has |
4987 | dwarf2_per_cu_quick_data::MARK set (see | |
4988 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4989 | EXPANSION_NOTIFY on it. */ | |
4990 | ||
4991 | static void | |
4992 | dw2_expand_symtabs_matching_one | |
4993 | (struct dwarf2_per_cu_data *per_cu, | |
4994 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4995 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4996 | { | |
4997 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4998 | { | |
4999 | bool symtab_was_null | |
5000 | = (per_cu->v.quick->compunit_symtab == NULL); | |
5001 | ||
58f0c718 | 5002 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
5003 | |
5004 | if (expansion_notify != NULL | |
5005 | && symtab_was_null | |
5006 | && per_cu->v.quick->compunit_symtab != NULL) | |
5007 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5008 | } | |
5009 | } | |
5010 | ||
3f563c84 PA |
5011 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
5012 | matched, to expand corresponding CUs that were marked. IDX is the | |
5013 | index of the symbol name that matched. */ | |
5014 | ||
5015 | static void | |
5016 | dw2_expand_marked_cus | |
ed2dc618 | 5017 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
5018 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
5019 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5020 | search_domain kind) | |
5021 | { | |
3f563c84 PA |
5022 | offset_type *vec, vec_len, vec_idx; |
5023 | bool global_seen = false; | |
ed2dc618 | 5024 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 5025 | |
61920122 | 5026 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 5027 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
5028 | vec_len = MAYBE_SWAP (vec[0]); |
5029 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
5030 | { | |
61920122 PA |
5031 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
5032 | /* This value is only valid for index versions >= 7. */ | |
5033 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
5034 | gdb_index_symbol_kind symbol_kind = | |
5035 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
5036 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
5037 | /* Only check the symbol attributes if they're present. | |
5038 | Indices prior to version 7 don't record them, | |
5039 | and indices >= 7 may elide them for certain symbols | |
5040 | (gold does this). */ | |
5041 | int attrs_valid = | |
5042 | (index.version >= 7 | |
5043 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
5044 | ||
5045 | /* Work around gold/15646. */ | |
5046 | if (attrs_valid) | |
9291a0cd | 5047 | { |
61920122 PA |
5048 | if (!is_static && global_seen) |
5049 | continue; | |
5050 | if (!is_static) | |
5051 | global_seen = true; | |
5052 | } | |
3190f0c6 | 5053 | |
61920122 PA |
5054 | /* Only check the symbol's kind if it has one. */ |
5055 | if (attrs_valid) | |
5056 | { | |
5057 | switch (kind) | |
8943b874 | 5058 | { |
61920122 PA |
5059 | case VARIABLES_DOMAIN: |
5060 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
5061 | continue; | |
5062 | break; | |
5063 | case FUNCTIONS_DOMAIN: | |
5064 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 5065 | continue; |
61920122 PA |
5066 | break; |
5067 | case TYPES_DOMAIN: | |
5068 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
5069 | continue; | |
5070 | break; | |
5071 | default: | |
5072 | break; | |
8943b874 | 5073 | } |
61920122 | 5074 | } |
8943b874 | 5075 | |
61920122 | 5076 | /* Don't crash on bad data. */ |
b76e467d | 5077 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5078 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 5079 | { |
b98664d3 | 5080 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
5081 | " [in module %s]"), |
5082 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
5083 | continue; |
5084 | } | |
5085 | ||
ff4c9fec | 5086 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
5087 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
5088 | expansion_notify); | |
61920122 PA |
5089 | } |
5090 | } | |
5091 | ||
4b514bc8 JK |
5092 | /* If FILE_MATCHER is non-NULL, set all the |
5093 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
5094 | that match FILE_MATCHER. */ | |
5095 | ||
61920122 | 5096 | static void |
4b514bc8 | 5097 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
5098 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5099 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 5100 | { |
4b514bc8 | 5101 | if (file_matcher == NULL) |
61920122 PA |
5102 | return; |
5103 | ||
4b514bc8 JK |
5104 | objfile *const objfile = dwarf2_per_objfile->objfile; |
5105 | ||
5106 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5107 | htab_eq_pointer, | |
5108 | NULL, xcalloc, xfree)); | |
5109 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
5110 | htab_eq_pointer, |
5111 | NULL, xcalloc, xfree)); | |
61920122 | 5112 | |
4b514bc8 JK |
5113 | /* The rule is CUs specify all the files, including those used by |
5114 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 5115 | |
b76e467d | 5116 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5117 | { |
927aa2e7 JK |
5118 | QUIT; |
5119 | ||
5120 | per_cu->v.quick->mark = 0; | |
5121 | ||
5122 | /* We only need to look at symtabs not already expanded. */ | |
5123 | if (per_cu->v.quick->compunit_symtab) | |
5124 | continue; | |
5125 | ||
b76e467d | 5126 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5127 | if (file_data == NULL) |
5128 | continue; | |
5129 | ||
5130 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5131 | continue; | |
5132 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
5133 | { | |
5134 | per_cu->v.quick->mark = 1; | |
5135 | continue; | |
5136 | } | |
5137 | ||
b76e467d | 5138 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
5139 | { |
5140 | const char *this_real_name; | |
5141 | ||
5142 | if (file_matcher (file_data->file_names[j], false)) | |
5143 | { | |
5144 | per_cu->v.quick->mark = 1; | |
5145 | break; | |
5146 | } | |
5147 | ||
5148 | /* Before we invoke realpath, which can get expensive when many | |
5149 | files are involved, do a quick comparison of the basenames. */ | |
5150 | if (!basenames_may_differ | |
5151 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5152 | true)) | |
5153 | continue; | |
5154 | ||
5155 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
5156 | if (file_matcher (this_real_name, false)) | |
5157 | { | |
5158 | per_cu->v.quick->mark = 1; | |
5159 | break; | |
5160 | } | |
5161 | } | |
5162 | ||
b76e467d SM |
5163 | void **slot = htab_find_slot (per_cu->v.quick->mark |
5164 | ? visited_found.get () | |
5165 | : visited_not_found.get (), | |
5166 | file_data, INSERT); | |
927aa2e7 JK |
5167 | *slot = file_data; |
5168 | } | |
5169 | } | |
5170 | ||
5171 | static void | |
5172 | dw2_expand_symtabs_matching | |
5173 | (struct objfile *objfile, | |
5174 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5175 | const lookup_name_info &lookup_name, | |
5176 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5177 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5178 | enum search_domain kind) | |
5179 | { | |
ed2dc618 SM |
5180 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5181 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5182 | |
5183 | /* index_table is NULL if OBJF_READNOW. */ | |
5184 | if (!dwarf2_per_objfile->index_table) | |
5185 | return; | |
5186 | ||
ed2dc618 | 5187 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
5188 | |
5189 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5190 | ||
5191 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5192 | symbol_matcher, | |
5193 | kind, [&] (offset_type idx) | |
5194 | { | |
ed2dc618 | 5195 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 JK |
5196 | expansion_notify, kind); |
5197 | }); | |
5198 | } | |
5199 | ||
5200 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
5201 | symtab. */ | |
5202 | ||
5203 | static struct compunit_symtab * | |
5204 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5205 | CORE_ADDR pc) | |
5206 | { | |
5207 | int i; | |
5208 | ||
5209 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
5210 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5211 | return cust; | |
5212 | ||
5213 | if (cust->includes == NULL) | |
5214 | return NULL; | |
5215 | ||
5216 | for (i = 0; cust->includes[i]; ++i) | |
5217 | { | |
5218 | struct compunit_symtab *s = cust->includes[i]; | |
5219 | ||
5220 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
5221 | if (s != NULL) | |
5222 | return s; | |
5223 | } | |
5224 | ||
5225 | return NULL; | |
5226 | } | |
5227 | ||
5228 | static struct compunit_symtab * | |
5229 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5230 | struct bound_minimal_symbol msymbol, | |
5231 | CORE_ADDR pc, | |
5232 | struct obj_section *section, | |
5233 | int warn_if_readin) | |
5234 | { | |
5235 | struct dwarf2_per_cu_data *data; | |
5236 | struct compunit_symtab *result; | |
5237 | ||
d320c2b5 | 5238 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
5239 | return NULL; |
5240 | ||
79748972 TT |
5241 | CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, |
5242 | SECT_OFF_TEXT (objfile)); | |
d320c2b5 TT |
5243 | data = (struct dwarf2_per_cu_data *) addrmap_find |
5244 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
5245 | if (!data) |
5246 | return NULL; | |
5247 | ||
5248 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
5249 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
5250 | paddress (get_objfile_arch (objfile), pc)); | |
5251 | ||
5252 | result | |
58f0c718 TT |
5253 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
5254 | false), | |
927aa2e7 JK |
5255 | pc); |
5256 | gdb_assert (result != NULL); | |
5257 | return result; | |
5258 | } | |
5259 | ||
5260 | static void | |
5261 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
5262 | void *data, int need_fullname) | |
5263 | { | |
ed2dc618 SM |
5264 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5265 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5266 | |
5267 | if (!dwarf2_per_objfile->filenames_cache) | |
5268 | { | |
5269 | dwarf2_per_objfile->filenames_cache.emplace (); | |
5270 | ||
5271 | htab_up visited (htab_create_alloc (10, | |
5272 | htab_hash_pointer, htab_eq_pointer, | |
5273 | NULL, xcalloc, xfree)); | |
5274 | ||
5275 | /* The rule is CUs specify all the files, including those used | |
5276 | by any TU, so there's no need to scan TUs here. We can | |
5277 | ignore file names coming from already-expanded CUs. */ | |
5278 | ||
b76e467d | 5279 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5280 | { |
927aa2e7 JK |
5281 | if (per_cu->v.quick->compunit_symtab) |
5282 | { | |
5283 | void **slot = htab_find_slot (visited.get (), | |
5284 | per_cu->v.quick->file_names, | |
5285 | INSERT); | |
5286 | ||
5287 | *slot = per_cu->v.quick->file_names; | |
5288 | } | |
5289 | } | |
5290 | ||
b76e467d | 5291 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5292 | { |
927aa2e7 JK |
5293 | /* We only need to look at symtabs not already expanded. */ |
5294 | if (per_cu->v.quick->compunit_symtab) | |
5295 | continue; | |
5296 | ||
b76e467d | 5297 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5298 | if (file_data == NULL) |
5299 | continue; | |
5300 | ||
b76e467d | 5301 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
5302 | if (*slot) |
5303 | { | |
5304 | /* Already visited. */ | |
5305 | continue; | |
5306 | } | |
5307 | *slot = file_data; | |
5308 | ||
5309 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5310 | { | |
5311 | const char *filename = file_data->file_names[j]; | |
5312 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5313 | } | |
5314 | } | |
5315 | } | |
5316 | ||
5317 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5318 | { | |
5319 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
5320 | ||
5321 | if (need_fullname) | |
5322 | this_real_name = gdb_realpath (filename); | |
5323 | (*fun) (filename, this_real_name.get (), data); | |
5324 | }); | |
5325 | } | |
5326 | ||
5327 | static int | |
5328 | dw2_has_symbols (struct objfile *objfile) | |
5329 | { | |
5330 | return 1; | |
5331 | } | |
5332 | ||
5333 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5334 | { | |
5335 | dw2_has_symbols, | |
5336 | dw2_find_last_source_symtab, | |
5337 | dw2_forget_cached_source_info, | |
5338 | dw2_map_symtabs_matching_filename, | |
5339 | dw2_lookup_symbol, | |
5340 | dw2_print_stats, | |
5341 | dw2_dump, | |
927aa2e7 JK |
5342 | dw2_expand_symtabs_for_function, |
5343 | dw2_expand_all_symtabs, | |
5344 | dw2_expand_symtabs_with_fullname, | |
5345 | dw2_map_matching_symbols, | |
5346 | dw2_expand_symtabs_matching, | |
5347 | dw2_find_pc_sect_compunit_symtab, | |
5348 | NULL, | |
5349 | dw2_map_symbol_filenames | |
5350 | }; | |
5351 | ||
5352 | /* DWARF-5 debug_names reader. */ | |
5353 | ||
5354 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
5355 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
5356 | ||
5357 | /* A helper function that reads the .debug_names section in SECTION | |
5358 | and fills in MAP. FILENAME is the name of the file containing the | |
5359 | section; it is used for error reporting. | |
5360 | ||
5361 | Returns true if all went well, false otherwise. */ | |
5362 | ||
5363 | static bool | |
5364 | read_debug_names_from_section (struct objfile *objfile, | |
5365 | const char *filename, | |
5366 | struct dwarf2_section_info *section, | |
5367 | mapped_debug_names &map) | |
5368 | { | |
5369 | if (dwarf2_section_empty_p (section)) | |
5370 | return false; | |
5371 | ||
5372 | /* Older elfutils strip versions could keep the section in the main | |
5373 | executable while splitting it for the separate debug info file. */ | |
5374 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
5375 | return false; | |
5376 | ||
5377 | dwarf2_read_section (objfile, section); | |
5378 | ||
5379 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
5380 | ||
5381 | const gdb_byte *addr = section->buffer; | |
5382 | ||
5383 | bfd *const abfd = get_section_bfd_owner (section); | |
5384 | ||
5385 | unsigned int bytes_read; | |
5386 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
5387 | addr += bytes_read; | |
5388 | ||
5389 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
5390 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
5391 | if (bytes_read + length != section->size) | |
5392 | { | |
5393 | /* There may be multiple per-CU indices. */ | |
5394 | warning (_("Section .debug_names in %s length %s does not match " | |
5395 | "section length %s, ignoring .debug_names."), | |
5396 | filename, plongest (bytes_read + length), | |
5397 | pulongest (section->size)); | |
5398 | return false; | |
5399 | } | |
5400 | ||
5401 | /* The version number. */ | |
5402 | uint16_t version = read_2_bytes (abfd, addr); | |
5403 | addr += 2; | |
5404 | if (version != 5) | |
5405 | { | |
5406 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
5407 | "ignoring .debug_names."), | |
5408 | filename, version); | |
5409 | return false; | |
5410 | } | |
5411 | ||
5412 | /* Padding. */ | |
5413 | uint16_t padding = read_2_bytes (abfd, addr); | |
5414 | addr += 2; | |
5415 | if (padding != 0) | |
5416 | { | |
5417 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
5418 | "ignoring .debug_names."), | |
5419 | filename, padding); | |
5420 | return false; | |
5421 | } | |
5422 | ||
5423 | /* comp_unit_count - The number of CUs in the CU list. */ | |
5424 | map.cu_count = read_4_bytes (abfd, addr); | |
5425 | addr += 4; | |
5426 | ||
5427 | /* local_type_unit_count - The number of TUs in the local TU | |
5428 | list. */ | |
5429 | map.tu_count = read_4_bytes (abfd, addr); | |
5430 | addr += 4; | |
5431 | ||
5432 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
5433 | list. */ | |
5434 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
5435 | addr += 4; | |
5436 | if (foreign_tu_count != 0) | |
5437 | { | |
5438 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
5439 | "ignoring .debug_names."), | |
5440 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
5441 | return false; | |
5442 | } | |
5443 | ||
5444 | /* bucket_count - The number of hash buckets in the hash lookup | |
5445 | table. */ | |
5446 | map.bucket_count = read_4_bytes (abfd, addr); | |
5447 | addr += 4; | |
5448 | ||
5449 | /* name_count - The number of unique names in the index. */ | |
5450 | map.name_count = read_4_bytes (abfd, addr); | |
5451 | addr += 4; | |
5452 | ||
5453 | /* abbrev_table_size - The size in bytes of the abbreviations | |
5454 | table. */ | |
5455 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
5456 | addr += 4; | |
5457 | ||
5458 | /* augmentation_string_size - The size in bytes of the augmentation | |
5459 | string. This value is rounded up to a multiple of 4. */ | |
5460 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
5461 | addr += 4; | |
5462 | map.augmentation_is_gdb = ((augmentation_string_size | |
5463 | == sizeof (dwarf5_augmentation)) | |
5464 | && memcmp (addr, dwarf5_augmentation, | |
5465 | sizeof (dwarf5_augmentation)) == 0); | |
5466 | augmentation_string_size += (-augmentation_string_size) & 3; | |
5467 | addr += augmentation_string_size; | |
5468 | ||
5469 | /* List of CUs */ | |
5470 | map.cu_table_reordered = addr; | |
5471 | addr += map.cu_count * map.offset_size; | |
5472 | ||
5473 | /* List of Local TUs */ | |
5474 | map.tu_table_reordered = addr; | |
5475 | addr += map.tu_count * map.offset_size; | |
5476 | ||
5477 | /* Hash Lookup Table */ | |
5478 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5479 | addr += map.bucket_count * 4; | |
5480 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5481 | addr += map.name_count * 4; | |
5482 | ||
5483 | /* Name Table */ | |
5484 | map.name_table_string_offs_reordered = addr; | |
5485 | addr += map.name_count * map.offset_size; | |
5486 | map.name_table_entry_offs_reordered = addr; | |
5487 | addr += map.name_count * map.offset_size; | |
5488 | ||
5489 | const gdb_byte *abbrev_table_start = addr; | |
5490 | for (;;) | |
5491 | { | |
927aa2e7 JK |
5492 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
5493 | addr += bytes_read; | |
5494 | if (index_num == 0) | |
5495 | break; | |
5496 | ||
5497 | const auto insertpair | |
5498 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
5499 | if (!insertpair.second) | |
5500 | { | |
5501 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
5502 | "ignoring .debug_names."), | |
5503 | filename, pulongest (index_num)); | |
5504 | return false; | |
5505 | } | |
5506 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
5507 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5508 | addr += bytes_read; | |
5509 | ||
5510 | for (;;) | |
5511 | { | |
5512 | mapped_debug_names::index_val::attr attr; | |
5513 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5514 | addr += bytes_read; | |
5515 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5516 | addr += bytes_read; | |
5517 | if (attr.form == DW_FORM_implicit_const) | |
5518 | { | |
5519 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
5520 | &bytes_read); | |
5521 | addr += bytes_read; | |
5522 | } | |
5523 | if (attr.dw_idx == 0 && attr.form == 0) | |
5524 | break; | |
5525 | indexval.attr_vec.push_back (std::move (attr)); | |
5526 | } | |
5527 | } | |
5528 | if (addr != abbrev_table_start + abbrev_table_size) | |
5529 | { | |
5530 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
5531 | "of size %s vs. written as %u, ignoring .debug_names."), |
5532 | filename, plongest (addr - abbrev_table_start), | |
5533 | abbrev_table_size); | |
927aa2e7 JK |
5534 | return false; |
5535 | } | |
5536 | map.entry_pool = addr; | |
5537 | ||
5538 | return true; | |
5539 | } | |
5540 | ||
5541 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5542 | list. */ | |
5543 | ||
5544 | static void | |
ed2dc618 | 5545 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5546 | const mapped_debug_names &map, |
5547 | dwarf2_section_info §ion, | |
b76e467d | 5548 | bool is_dwz) |
927aa2e7 JK |
5549 | { |
5550 | sect_offset sect_off_prev; | |
5551 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5552 | { | |
5553 | sect_offset sect_off_next; | |
5554 | if (i < map.cu_count) | |
5555 | { | |
5556 | sect_off_next | |
5557 | = (sect_offset) (extract_unsigned_integer | |
5558 | (map.cu_table_reordered + i * map.offset_size, | |
5559 | map.offset_size, | |
5560 | map.dwarf5_byte_order)); | |
5561 | } | |
5562 | else | |
5563 | sect_off_next = (sect_offset) section.size; | |
5564 | if (i >= 1) | |
5565 | { | |
5566 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5567 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5568 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5569 | sect_off_prev, length); |
b76e467d | 5570 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5571 | } |
5572 | sect_off_prev = sect_off_next; | |
5573 | } | |
5574 | } | |
5575 | ||
5576 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5577 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5578 | |
5579 | static void | |
ed2dc618 | 5580 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5581 | const mapped_debug_names &map, |
5582 | const mapped_debug_names &dwz_map) | |
5583 | { | |
b76e467d SM |
5584 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5585 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5586 | |
ed2dc618 SM |
5587 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5588 | dwarf2_per_objfile->info, | |
b76e467d | 5589 | false /* is_dwz */); |
927aa2e7 JK |
5590 | |
5591 | if (dwz_map.cu_count == 0) | |
5592 | return; | |
5593 | ||
ed2dc618 SM |
5594 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5595 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5596 | true /* is_dwz */); |
927aa2e7 JK |
5597 | } |
5598 | ||
5599 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5600 | elements of all the CUs and return true. Otherwise, return false. */ | |
5601 | ||
5602 | static bool | |
ed2dc618 | 5603 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5604 | { |
22ca247e TT |
5605 | std::unique_ptr<mapped_debug_names> map |
5606 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5607 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5608 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5609 | |
5610 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5611 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5612 | *map)) |
927aa2e7 JK |
5613 | return false; |
5614 | ||
5615 | /* Don't use the index if it's empty. */ | |
22ca247e | 5616 | if (map->name_count == 0) |
927aa2e7 JK |
5617 | return false; |
5618 | ||
5619 | /* If there is a .dwz file, read it so we can get its CU list as | |
5620 | well. */ | |
ed2dc618 | 5621 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5622 | if (dwz != NULL) |
5623 | { | |
5624 | if (!read_debug_names_from_section (objfile, | |
5625 | bfd_get_filename (dwz->dwz_bfd), | |
5626 | &dwz->debug_names, dwz_map)) | |
5627 | { | |
5628 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
5629 | bfd_get_filename (dwz->dwz_bfd)); | |
5630 | return false; | |
5631 | } | |
5632 | } | |
5633 | ||
22ca247e | 5634 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5635 | |
22ca247e | 5636 | if (map->tu_count != 0) |
927aa2e7 JK |
5637 | { |
5638 | /* We can only handle a single .debug_types when we have an | |
5639 | index. */ | |
fd5866f6 | 5640 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5641 | return false; |
5642 | ||
fd5866f6 | 5643 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5644 | |
5645 | create_signatured_type_table_from_debug_names | |
22ca247e | 5646 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5647 | } |
5648 | ||
ed2dc618 SM |
5649 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5650 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5651 | |
22ca247e | 5652 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5653 | dwarf2_per_objfile->using_index = 1; |
5654 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5655 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5656 | |
5657 | return true; | |
5658 | } | |
5659 | ||
927aa2e7 JK |
5660 | /* Type used to manage iterating over all CUs looking for a symbol for |
5661 | .debug_names. */ | |
5662 | ||
5663 | class dw2_debug_names_iterator | |
5664 | { | |
5665 | public: | |
927aa2e7 | 5666 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5667 | gdb::optional<block_enum> block_index, |
5668 | domain_enum domain, | |
927aa2e7 | 5669 | const char *name) |
2b79f376 | 5670 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5671 | m_addr (find_vec_in_debug_names (map, name)) |
5672 | {} | |
5673 | ||
5674 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5675 | search_domain search, uint32_t namei) | |
5676 | : m_map (map), | |
5677 | m_search (search), | |
5678 | m_addr (find_vec_in_debug_names (map, namei)) | |
5679 | {} | |
5680 | ||
5681 | /* Return the next matching CU or NULL if there are no more. */ | |
5682 | dwarf2_per_cu_data *next (); | |
5683 | ||
5684 | private: | |
5685 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5686 | const char *name); | |
5687 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5688 | uint32_t namei); | |
5689 | ||
5690 | /* The internalized form of .debug_names. */ | |
5691 | const mapped_debug_names &m_map; | |
5692 | ||
2b79f376 SM |
5693 | /* If set, only look for symbols that match that block. Valid values are |
5694 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5695 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5696 | |
5697 | /* The kind of symbol we're looking for. */ | |
5698 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5699 | const search_domain m_search = ALL_DOMAIN; | |
5700 | ||
5701 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5702 | not found. */ | |
5703 | const gdb_byte *m_addr; | |
5704 | }; | |
5705 | ||
5706 | const char * | |
5707 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5708 | { | |
5709 | const ULONGEST namei_string_offs | |
5710 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5711 | + namei * offset_size), | |
5712 | offset_size, | |
5713 | dwarf5_byte_order); | |
5714 | return read_indirect_string_at_offset | |
ed2dc618 | 5715 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5716 | } |
5717 | ||
5718 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5719 | found, return pointer to its pool data. If NAME cannot be found, | |
5720 | return NULL. */ | |
5721 | ||
5722 | const gdb_byte * | |
5723 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5724 | (const mapped_debug_names &map, const char *name) | |
5725 | { | |
5726 | int (*cmp) (const char *, const char *); | |
5727 | ||
54ee4252 | 5728 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5729 | if (current_language->la_language == language_cplus |
5730 | || current_language->la_language == language_fortran | |
5731 | || current_language->la_language == language_d) | |
5732 | { | |
5733 | /* NAME is already canonical. Drop any qualifiers as | |
5734 | .debug_names does not contain any. */ | |
5735 | ||
5736 | if (strchr (name, '(') != NULL) | |
5737 | { | |
54ee4252 | 5738 | without_params = cp_remove_params (name); |
927aa2e7 | 5739 | if (without_params != NULL) |
54ee4252 | 5740 | name = without_params.get (); |
927aa2e7 JK |
5741 | } |
5742 | } | |
5743 | ||
5744 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5745 | ||
5746 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5747 | uint32_t namei | |
5748 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5749 | (map.bucket_table_reordered | |
5750 | + (full_hash % map.bucket_count)), 4, | |
5751 | map.dwarf5_byte_order); | |
5752 | if (namei == 0) | |
5753 | return NULL; | |
5754 | --namei; | |
5755 | if (namei >= map.name_count) | |
5756 | { | |
b98664d3 | 5757 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5758 | "[in module %s]"), |
5759 | namei, map.name_count, | |
ed2dc618 | 5760 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5761 | return NULL; |
5762 | } | |
5763 | ||
5764 | for (;;) | |
5765 | { | |
5766 | const uint32_t namei_full_hash | |
5767 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5768 | (map.hash_table_reordered + namei), 4, | |
5769 | map.dwarf5_byte_order); | |
5770 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5771 | return NULL; | |
5772 | ||
5773 | if (full_hash == namei_full_hash) | |
5774 | { | |
5775 | const char *const namei_string = map.namei_to_name (namei); | |
5776 | ||
5777 | #if 0 /* An expensive sanity check. */ | |
5778 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5779 | { | |
b98664d3 | 5780 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5781 | "[in module %s]"), |
5782 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5783 | return NULL; | |
5784 | } | |
5785 | #endif | |
5786 | ||
5787 | if (cmp (namei_string, name) == 0) | |
5788 | { | |
5789 | const ULONGEST namei_entry_offs | |
5790 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5791 | + namei * map.offset_size), | |
5792 | map.offset_size, map.dwarf5_byte_order); | |
5793 | return map.entry_pool + namei_entry_offs; | |
5794 | } | |
5795 | } | |
5796 | ||
5797 | ++namei; | |
5798 | if (namei >= map.name_count) | |
5799 | return NULL; | |
5800 | } | |
5801 | } | |
5802 | ||
5803 | const gdb_byte * | |
5804 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5805 | (const mapped_debug_names &map, uint32_t namei) | |
5806 | { | |
5807 | if (namei >= map.name_count) | |
5808 | { | |
b98664d3 | 5809 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5810 | "[in module %s]"), |
5811 | namei, map.name_count, | |
ed2dc618 | 5812 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5813 | return NULL; |
5814 | } | |
5815 | ||
5816 | const ULONGEST namei_entry_offs | |
5817 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5818 | + namei * map.offset_size), | |
5819 | map.offset_size, map.dwarf5_byte_order); | |
5820 | return map.entry_pool + namei_entry_offs; | |
5821 | } | |
5822 | ||
5823 | /* See dw2_debug_names_iterator. */ | |
5824 | ||
5825 | dwarf2_per_cu_data * | |
5826 | dw2_debug_names_iterator::next () | |
5827 | { | |
5828 | if (m_addr == NULL) | |
5829 | return NULL; | |
5830 | ||
ed2dc618 SM |
5831 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5832 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5833 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5834 | |
5835 | again: | |
5836 | ||
5837 | unsigned int bytes_read; | |
5838 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5839 | m_addr += bytes_read; | |
5840 | if (abbrev == 0) | |
5841 | return NULL; | |
5842 | ||
5843 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5844 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5845 | { | |
b98664d3 | 5846 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5847 | "[in module %s]"), |
ed2dc618 | 5848 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5849 | return NULL; |
5850 | } | |
5851 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5852 | enum class symbol_linkage { |
5853 | unknown, | |
5854 | static_, | |
5855 | extern_, | |
23c13d42 | 5856 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5857 | dwarf2_per_cu_data *per_cu = NULL; |
5858 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5859 | { | |
5860 | ULONGEST ull; | |
5861 | switch (attr.form) | |
5862 | { | |
5863 | case DW_FORM_implicit_const: | |
5864 | ull = attr.implicit_const; | |
5865 | break; | |
5866 | case DW_FORM_flag_present: | |
5867 | ull = 1; | |
5868 | break; | |
5869 | case DW_FORM_udata: | |
5870 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5871 | m_addr += bytes_read; | |
5872 | break; | |
5873 | default: | |
b98664d3 | 5874 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5875 | dwarf_form_name (attr.form), |
ed2dc618 | 5876 | objfile_name (objfile)); |
927aa2e7 JK |
5877 | return NULL; |
5878 | } | |
5879 | switch (attr.dw_idx) | |
5880 | { | |
5881 | case DW_IDX_compile_unit: | |
5882 | /* Don't crash on bad data. */ | |
b76e467d | 5883 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5884 | { |
b98664d3 | 5885 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5886 | " [in module %s]"), |
5887 | pulongest (ull), | |
5888 | objfile_name (dwarf2_per_objfile->objfile)); | |
5889 | continue; | |
5890 | } | |
ff4c9fec | 5891 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5892 | break; |
8af5c486 JK |
5893 | case DW_IDX_type_unit: |
5894 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5895 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5896 | { |
b98664d3 | 5897 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5898 | " [in module %s]"), |
5899 | pulongest (ull), | |
5900 | objfile_name (dwarf2_per_objfile->objfile)); | |
5901 | continue; | |
5902 | } | |
ff4c9fec | 5903 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5904 | break; |
927aa2e7 JK |
5905 | case DW_IDX_GNU_internal: |
5906 | if (!m_map.augmentation_is_gdb) | |
5907 | break; | |
23c13d42 | 5908 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5909 | break; |
5910 | case DW_IDX_GNU_external: | |
5911 | if (!m_map.augmentation_is_gdb) | |
5912 | break; | |
23c13d42 | 5913 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5914 | break; |
5915 | } | |
5916 | } | |
5917 | ||
5918 | /* Skip if already read in. */ | |
5919 | if (per_cu->v.quick->compunit_symtab) | |
5920 | goto again; | |
5921 | ||
5922 | /* Check static vs global. */ | |
23c13d42 | 5923 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5924 | { |
2b79f376 | 5925 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5926 | const bool symbol_is_static = |
5927 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5928 | if (want_static != symbol_is_static) |
2b79f376 | 5929 | goto again; |
927aa2e7 JK |
5930 | } |
5931 | ||
5932 | /* Match dw2_symtab_iter_next, symbol_kind | |
5933 | and debug_names::psymbol_tag. */ | |
5934 | switch (m_domain) | |
5935 | { | |
5936 | case VAR_DOMAIN: | |
5937 | switch (indexval.dwarf_tag) | |
5938 | { | |
5939 | case DW_TAG_variable: | |
5940 | case DW_TAG_subprogram: | |
5941 | /* Some types are also in VAR_DOMAIN. */ | |
5942 | case DW_TAG_typedef: | |
5943 | case DW_TAG_structure_type: | |
5944 | break; | |
5945 | default: | |
5946 | goto again; | |
5947 | } | |
5948 | break; | |
5949 | case STRUCT_DOMAIN: | |
5950 | switch (indexval.dwarf_tag) | |
5951 | { | |
5952 | case DW_TAG_typedef: | |
5953 | case DW_TAG_structure_type: | |
5954 | break; | |
5955 | default: | |
5956 | goto again; | |
5957 | } | |
5958 | break; | |
5959 | case LABEL_DOMAIN: | |
5960 | switch (indexval.dwarf_tag) | |
5961 | { | |
5962 | case 0: | |
5963 | case DW_TAG_variable: | |
5964 | break; | |
5965 | default: | |
5966 | goto again; | |
5967 | } | |
5968 | break; | |
5969 | default: | |
5970 | break; | |
5971 | } | |
5972 | ||
5973 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5974 | debug_names::psymbol_tag. */ | |
5975 | switch (m_search) | |
4b514bc8 | 5976 | { |
927aa2e7 JK |
5977 | case VARIABLES_DOMAIN: |
5978 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5979 | { |
927aa2e7 JK |
5980 | case DW_TAG_variable: |
5981 | break; | |
5982 | default: | |
5983 | goto again; | |
4b514bc8 | 5984 | } |
927aa2e7 JK |
5985 | break; |
5986 | case FUNCTIONS_DOMAIN: | |
5987 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5988 | { |
927aa2e7 JK |
5989 | case DW_TAG_subprogram: |
5990 | break; | |
5991 | default: | |
5992 | goto again; | |
4b514bc8 | 5993 | } |
927aa2e7 JK |
5994 | break; |
5995 | case TYPES_DOMAIN: | |
5996 | switch (indexval.dwarf_tag) | |
5997 | { | |
5998 | case DW_TAG_typedef: | |
5999 | case DW_TAG_structure_type: | |
6000 | break; | |
6001 | default: | |
6002 | goto again; | |
6003 | } | |
6004 | break; | |
6005 | default: | |
6006 | break; | |
4b514bc8 | 6007 | } |
927aa2e7 JK |
6008 | |
6009 | return per_cu; | |
4b514bc8 | 6010 | } |
61920122 | 6011 | |
927aa2e7 | 6012 | static struct compunit_symtab * |
c7f839cb | 6013 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 6014 | const char *name, domain_enum domain) |
4b514bc8 | 6015 | { |
ed2dc618 SM |
6016 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6017 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 6018 | |
927aa2e7 JK |
6019 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
6020 | if (!mapp) | |
61920122 | 6021 | { |
927aa2e7 JK |
6022 | /* index is NULL if OBJF_READNOW. */ |
6023 | return NULL; | |
6024 | } | |
6025 | const auto &map = *mapp; | |
9291a0cd | 6026 | |
2b79f376 | 6027 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 6028 | |
927aa2e7 JK |
6029 | struct compunit_symtab *stab_best = NULL; |
6030 | struct dwarf2_per_cu_data *per_cu; | |
6031 | while ((per_cu = iter.next ()) != NULL) | |
6032 | { | |
6033 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 6034 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 6035 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 6036 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 6037 | |
927aa2e7 JK |
6038 | sym = block_find_symbol (block, name, domain, |
6039 | block_find_non_opaque_type_preferred, | |
6040 | &with_opaque); | |
9703b513 | 6041 | |
927aa2e7 JK |
6042 | /* Some caution must be observed with overloaded functions and |
6043 | methods, since the index will not contain any overload | |
6044 | information (but NAME might contain it). */ | |
a3ec0bb1 | 6045 | |
927aa2e7 JK |
6046 | if (sym != NULL |
6047 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) | |
6048 | return stab; | |
6049 | if (with_opaque != NULL | |
6050 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) | |
6051 | stab_best = stab; | |
9703b513 | 6052 | |
927aa2e7 | 6053 | /* Keep looking through other CUs. */ |
9703b513 TT |
6054 | } |
6055 | ||
927aa2e7 | 6056 | return stab_best; |
9703b513 TT |
6057 | } |
6058 | ||
927aa2e7 JK |
6059 | /* This dumps minimal information about .debug_names. It is called |
6060 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
6061 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 6062 | |
927aa2e7 JK |
6063 | static void |
6064 | dw2_debug_names_dump (struct objfile *objfile) | |
6065 | { | |
ed2dc618 SM |
6066 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6067 | = get_dwarf2_per_objfile (objfile); | |
6068 | ||
927aa2e7 JK |
6069 | gdb_assert (dwarf2_per_objfile->using_index); |
6070 | printf_filtered (".debug_names:"); | |
6071 | if (dwarf2_per_objfile->debug_names_table) | |
6072 | printf_filtered (" exists\n"); | |
6073 | else | |
6074 | printf_filtered (" faked for \"readnow\"\n"); | |
6075 | printf_filtered ("\n"); | |
9291a0cd TT |
6076 | } |
6077 | ||
9291a0cd | 6078 | static void |
927aa2e7 JK |
6079 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
6080 | const char *func_name) | |
9291a0cd | 6081 | { |
ed2dc618 SM |
6082 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6083 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 6084 | |
927aa2e7 JK |
6085 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
6086 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 6087 | { |
927aa2e7 | 6088 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 6089 | |
2b79f376 | 6090 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 6091 | |
927aa2e7 JK |
6092 | struct dwarf2_per_cu_data *per_cu; |
6093 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 6094 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
6095 | } |
6096 | } | |
24c79950 | 6097 | |
927aa2e7 JK |
6098 | static void |
6099 | dw2_debug_names_expand_symtabs_matching | |
6100 | (struct objfile *objfile, | |
6101 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
6102 | const lookup_name_info &lookup_name, | |
6103 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
6104 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
6105 | enum search_domain kind) | |
6106 | { | |
ed2dc618 SM |
6107 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6108 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 6109 | |
927aa2e7 JK |
6110 | /* debug_names_table is NULL if OBJF_READNOW. */ |
6111 | if (!dwarf2_per_objfile->debug_names_table) | |
6112 | return; | |
9291a0cd | 6113 | |
ed2dc618 | 6114 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 6115 | |
44ed8f3e | 6116 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 6117 | |
44ed8f3e PA |
6118 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
6119 | symbol_matcher, | |
6120 | kind, [&] (offset_type namei) | |
927aa2e7 | 6121 | { |
927aa2e7 JK |
6122 | /* The name was matched, now expand corresponding CUs that were |
6123 | marked. */ | |
6124 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 6125 | |
927aa2e7 JK |
6126 | struct dwarf2_per_cu_data *per_cu; |
6127 | while ((per_cu = iter.next ()) != NULL) | |
6128 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
6129 | expansion_notify); | |
44ed8f3e | 6130 | }); |
9291a0cd TT |
6131 | } |
6132 | ||
927aa2e7 | 6133 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
6134 | { |
6135 | dw2_has_symbols, | |
6136 | dw2_find_last_source_symtab, | |
6137 | dw2_forget_cached_source_info, | |
f8eba3c6 | 6138 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 6139 | dw2_debug_names_lookup_symbol, |
9291a0cd | 6140 | dw2_print_stats, |
927aa2e7 | 6141 | dw2_debug_names_dump, |
927aa2e7 | 6142 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 6143 | dw2_expand_all_symtabs, |
652a8996 | 6144 | dw2_expand_symtabs_with_fullname, |
40658b94 | 6145 | dw2_map_matching_symbols, |
927aa2e7 | 6146 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 6147 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 6148 | NULL, |
9291a0cd TT |
6149 | dw2_map_symbol_filenames |
6150 | }; | |
6151 | ||
4485a1c1 SM |
6152 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
6153 | to either a dwarf2_per_objfile or dwz_file object. */ | |
6154 | ||
6155 | template <typename T> | |
6156 | static gdb::array_view<const gdb_byte> | |
6157 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
6158 | { | |
6159 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
6160 | ||
6161 | if (dwarf2_section_empty_p (section)) | |
6162 | return {}; | |
6163 | ||
6164 | /* Older elfutils strip versions could keep the section in the main | |
6165 | executable while splitting it for the separate debug info file. */ | |
6166 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
6167 | return {}; | |
6168 | ||
6169 | dwarf2_read_section (obj, section); | |
6170 | ||
8bebfcda PA |
6171 | /* dwarf2_section_info::size is a bfd_size_type, while |
6172 | gdb::array_view works with size_t. On 32-bit hosts, with | |
6173 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
6174 | is 32-bit. So we need an explicit narrowing conversion here. | |
6175 | This is fine, because it's impossible to allocate or mmap an | |
6176 | array/buffer larger than what size_t can represent. */ | |
6177 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
6178 | } |
6179 | ||
87d6a7aa SM |
6180 | /* Lookup the index cache for the contents of the index associated to |
6181 | DWARF2_OBJ. */ | |
6182 | ||
6183 | static gdb::array_view<const gdb_byte> | |
6184 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
6185 | { | |
6186 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
6187 | if (build_id == nullptr) | |
6188 | return {}; | |
6189 | ||
6190 | return global_index_cache.lookup_gdb_index (build_id, | |
6191 | &dwarf2_obj->index_cache_res); | |
6192 | } | |
6193 | ||
6194 | /* Same as the above, but for DWZ. */ | |
6195 | ||
6196 | static gdb::array_view<const gdb_byte> | |
6197 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
6198 | { | |
6199 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
6200 | if (build_id == nullptr) | |
6201 | return {}; | |
6202 | ||
6203 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
6204 | } | |
6205 | ||
3c0aa29a | 6206 | /* See symfile.h. */ |
9291a0cd | 6207 | |
3c0aa29a PA |
6208 | bool |
6209 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 6210 | { |
ed2dc618 SM |
6211 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6212 | = get_dwarf2_per_objfile (objfile); | |
6213 | ||
9291a0cd TT |
6214 | /* If we're about to read full symbols, don't bother with the |
6215 | indices. In this case we also don't care if some other debug | |
6216 | format is making psymtabs, because they are all about to be | |
6217 | expanded anyway. */ | |
6218 | if ((objfile->flags & OBJF_READNOW)) | |
6219 | { | |
9291a0cd | 6220 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
6221 | create_all_comp_units (dwarf2_per_objfile); |
6222 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
6223 | dwarf2_per_objfile->quick_file_names_table |
6224 | = create_quick_file_names_table | |
6225 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 6226 | |
b76e467d | 6227 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 6228 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 6229 | { |
ff4c9fec | 6230 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 6231 | |
e254ef6a DE |
6232 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6233 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
6234 | } |
6235 | ||
6236 | /* Return 1 so that gdb sees the "quick" functions. However, | |
6237 | these functions will be no-ops because we will have expanded | |
6238 | all symtabs. */ | |
3c0aa29a PA |
6239 | *index_kind = dw_index_kind::GDB_INDEX; |
6240 | return true; | |
9291a0cd TT |
6241 | } |
6242 | ||
ed2dc618 | 6243 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
6244 | { |
6245 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
6246 | return true; | |
6247 | } | |
927aa2e7 | 6248 | |
4485a1c1 SM |
6249 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
6250 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
6251 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
6252 | { |
6253 | *index_kind = dw_index_kind::GDB_INDEX; | |
6254 | return true; | |
6255 | } | |
9291a0cd | 6256 | |
87d6a7aa SM |
6257 | /* ... otherwise, try to find the index in the index cache. */ |
6258 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
6259 | get_gdb_index_contents_from_cache, | |
6260 | get_gdb_index_contents_from_cache_dwz)) | |
6261 | { | |
6262 | global_index_cache.hit (); | |
6263 | *index_kind = dw_index_kind::GDB_INDEX; | |
6264 | return true; | |
6265 | } | |
6266 | ||
6267 | global_index_cache.miss (); | |
3c0aa29a | 6268 | return false; |
9291a0cd TT |
6269 | } |
6270 | ||
6271 | \f | |
6272 | ||
dce234bc PP |
6273 | /* Build a partial symbol table. */ |
6274 | ||
6275 | void | |
f29dff0a | 6276 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 6277 | { |
ed2dc618 SM |
6278 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6279 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 6280 | |
6eee24ce | 6281 | init_psymbol_list (objfile, 1024); |
c906108c | 6282 | |
a70b8144 | 6283 | try |
c9bf0622 TT |
6284 | { |
6285 | /* This isn't really ideal: all the data we allocate on the | |
6286 | objfile's obstack is still uselessly kept around. However, | |
6287 | freeing it seems unsafe. */ | |
906768f9 | 6288 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 6289 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 6290 | psymtabs.keep (); |
87d6a7aa SM |
6291 | |
6292 | /* (maybe) store an index in the cache. */ | |
6293 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 6294 | } |
230d2906 | 6295 | catch (const gdb_exception_error &except) |
492d29ea PA |
6296 | { |
6297 | exception_print (gdb_stderr, except); | |
6298 | } | |
c906108c | 6299 | } |
c906108c | 6300 | |
1ce1cefd DE |
6301 | /* Return the total length of the CU described by HEADER. */ |
6302 | ||
6303 | static unsigned int | |
6304 | get_cu_length (const struct comp_unit_head *header) | |
6305 | { | |
6306 | return header->initial_length_size + header->length; | |
6307 | } | |
6308 | ||
9c541725 | 6309 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 6310 | |
9c541725 PA |
6311 | static inline bool |
6312 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 6313 | { |
9c541725 PA |
6314 | sect_offset bottom = cu_header->sect_off; |
6315 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 6316 | |
9c541725 | 6317 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
6318 | } |
6319 | ||
3b80fe9b DE |
6320 | /* Find the base address of the compilation unit for range lists and |
6321 | location lists. It will normally be specified by DW_AT_low_pc. | |
6322 | In DWARF-3 draft 4, the base address could be overridden by | |
6323 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
6324 | compilation units with discontinuous ranges. */ | |
6325 | ||
6326 | static void | |
6327 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
6328 | { | |
6329 | struct attribute *attr; | |
6330 | ||
6331 | cu->base_known = 0; | |
6332 | cu->base_address = 0; | |
6333 | ||
6334 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
6335 | if (attr) | |
6336 | { | |
31aa7e4e | 6337 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6338 | cu->base_known = 1; |
6339 | } | |
6340 | else | |
6341 | { | |
6342 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
6343 | if (attr) | |
6344 | { | |
31aa7e4e | 6345 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6346 | cu->base_known = 1; |
6347 | } | |
6348 | } | |
6349 | } | |
6350 | ||
93311388 | 6351 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 6352 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
6353 | NOTE: This leaves members offset, first_die_offset to be filled in |
6354 | by the caller. */ | |
107d2387 | 6355 | |
d521ce57 | 6356 | static const gdb_byte * |
107d2387 | 6357 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
6358 | const gdb_byte *info_ptr, |
6359 | struct dwarf2_section_info *section, | |
6360 | rcuh_kind section_kind) | |
107d2387 AC |
6361 | { |
6362 | int signed_addr; | |
891d2f0b | 6363 | unsigned int bytes_read; |
43988095 JK |
6364 | const char *filename = get_section_file_name (section); |
6365 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
6366 | |
6367 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
6368 | cu_header->initial_length_size = bytes_read; | |
6369 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 6370 | info_ptr += bytes_read; |
107d2387 | 6371 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1ea5da02 TV |
6372 | if (cu_header->version < 2 || cu_header->version > 5) |
6373 | error (_("Dwarf Error: wrong version in compilation unit header " | |
6374 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), | |
6375 | cu_header->version, filename); | |
107d2387 | 6376 | info_ptr += 2; |
43988095 JK |
6377 | if (cu_header->version < 5) |
6378 | switch (section_kind) | |
6379 | { | |
6380 | case rcuh_kind::COMPILE: | |
6381 | cu_header->unit_type = DW_UT_compile; | |
6382 | break; | |
6383 | case rcuh_kind::TYPE: | |
6384 | cu_header->unit_type = DW_UT_type; | |
6385 | break; | |
6386 | default: | |
6387 | internal_error (__FILE__, __LINE__, | |
6388 | _("read_comp_unit_head: invalid section_kind")); | |
6389 | } | |
6390 | else | |
6391 | { | |
6392 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
6393 | (read_1_byte (abfd, info_ptr)); | |
6394 | info_ptr += 1; | |
6395 | switch (cu_header->unit_type) | |
6396 | { | |
6397 | case DW_UT_compile: | |
a084a2a6 AT |
6398 | case DW_UT_partial: |
6399 | case DW_UT_skeleton: | |
6400 | case DW_UT_split_compile: | |
43988095 JK |
6401 | if (section_kind != rcuh_kind::COMPILE) |
6402 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6403 | "(is %s, should be %s) [in module %s]"), |
6404 | dwarf_unit_type_name (cu_header->unit_type), | |
6405 | dwarf_unit_type_name (DW_UT_type), filename); | |
43988095 JK |
6406 | break; |
6407 | case DW_UT_type: | |
a084a2a6 | 6408 | case DW_UT_split_type: |
43988095 JK |
6409 | section_kind = rcuh_kind::TYPE; |
6410 | break; | |
6411 | default: | |
6412 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6413 | "(is %#04x, should be one of: %s, %s, %s, %s or %s) " |
6414 | "[in module %s]"), cu_header->unit_type, | |
6415 | dwarf_unit_type_name (DW_UT_compile), | |
6416 | dwarf_unit_type_name (DW_UT_skeleton), | |
6417 | dwarf_unit_type_name (DW_UT_split_compile), | |
6418 | dwarf_unit_type_name (DW_UT_type), | |
6419 | dwarf_unit_type_name (DW_UT_split_type), filename); | |
43988095 JK |
6420 | } |
6421 | ||
6422 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6423 | info_ptr += 1; | |
6424 | } | |
9c541725 PA |
6425 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
6426 | cu_header, | |
6427 | &bytes_read); | |
613e1657 | 6428 | info_ptr += bytes_read; |
43988095 JK |
6429 | if (cu_header->version < 5) |
6430 | { | |
6431 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6432 | info_ptr += 1; | |
6433 | } | |
107d2387 AC |
6434 | signed_addr = bfd_get_sign_extend_vma (abfd); |
6435 | if (signed_addr < 0) | |
8e65ff28 | 6436 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6437 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 6438 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 6439 | |
a084a2a6 AT |
6440 | bool header_has_signature = section_kind == rcuh_kind::TYPE |
6441 | || cu_header->unit_type == DW_UT_skeleton | |
6442 | || cu_header->unit_type == DW_UT_split_compile; | |
43988095 | 6443 | |
a084a2a6 AT |
6444 | if (header_has_signature) |
6445 | { | |
43988095 JK |
6446 | cu_header->signature = read_8_bytes (abfd, info_ptr); |
6447 | info_ptr += 8; | |
a084a2a6 | 6448 | } |
43988095 | 6449 | |
a084a2a6 AT |
6450 | if (section_kind == rcuh_kind::TYPE) |
6451 | { | |
6452 | LONGEST type_offset; | |
43988095 JK |
6453 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); |
6454 | info_ptr += bytes_read; | |
9c541725 PA |
6455 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
6456 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
6457 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
6458 | "header (is %s) [in module %s]"), plongest (type_offset), | |
6459 | filename); | |
6460 | } | |
6461 | ||
107d2387 AC |
6462 | return info_ptr; |
6463 | } | |
6464 | ||
36586728 TT |
6465 | /* Helper function that returns the proper abbrev section for |
6466 | THIS_CU. */ | |
6467 | ||
6468 | static struct dwarf2_section_info * | |
6469 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
6470 | { | |
6471 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 6472 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
6473 | |
6474 | if (this_cu->is_dwz) | |
ed2dc618 | 6475 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
6476 | else |
6477 | abbrev = &dwarf2_per_objfile->abbrev; | |
6478 | ||
6479 | return abbrev; | |
6480 | } | |
6481 | ||
9ff913ba DE |
6482 | /* Subroutine of read_and_check_comp_unit_head and |
6483 | read_and_check_type_unit_head to simplify them. | |
6484 | Perform various error checking on the header. */ | |
6485 | ||
6486 | static void | |
ed2dc618 SM |
6487 | error_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6488 | struct comp_unit_head *header, | |
4bdcc0c1 DE |
6489 | struct dwarf2_section_info *section, |
6490 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 6491 | { |
a32a8923 | 6492 | const char *filename = get_section_file_name (section); |
9ff913ba | 6493 | |
9c541725 | 6494 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 6495 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9d8780f0 SM |
6496 | error (_("Dwarf Error: bad offset (%s) in compilation unit header " |
6497 | "(offset %s + 6) [in module %s]"), | |
6498 | sect_offset_str (header->abbrev_sect_off), | |
6499 | sect_offset_str (header->sect_off), | |
9ff913ba DE |
6500 | filename); |
6501 | ||
9c541725 | 6502 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 6503 | avoid potential 32-bit overflow. */ |
9c541725 | 6504 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 6505 | > section->size) |
9c541725 | 6506 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
9d8780f0 SM |
6507 | "(offset %s + 0) [in module %s]"), |
6508 | header->length, sect_offset_str (header->sect_off), | |
9ff913ba DE |
6509 | filename); |
6510 | } | |
6511 | ||
6512 | /* Read in a CU/TU header and perform some basic error checking. | |
6513 | The contents of the header are stored in HEADER. | |
6514 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 6515 | |
d521ce57 | 6516 | static const gdb_byte * |
ed2dc618 SM |
6517 | read_and_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6518 | struct comp_unit_head *header, | |
9ff913ba | 6519 | struct dwarf2_section_info *section, |
4bdcc0c1 | 6520 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 6521 | const gdb_byte *info_ptr, |
43988095 | 6522 | rcuh_kind section_kind) |
72bf9492 | 6523 | { |
d521ce57 | 6524 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 6525 | |
9c541725 | 6526 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 6527 | |
43988095 | 6528 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 6529 | |
9c541725 | 6530 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 6531 | |
ed2dc618 SM |
6532 | error_check_comp_unit_head (dwarf2_per_objfile, header, section, |
6533 | abbrev_section); | |
9ff913ba DE |
6534 | |
6535 | return info_ptr; | |
348e048f DE |
6536 | } |
6537 | ||
f4dc4d17 DE |
6538 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
6539 | ||
6540 | static sect_offset | |
ed2dc618 SM |
6541 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6542 | struct dwarf2_section_info *section, | |
9c541725 | 6543 | sect_offset sect_off) |
f4dc4d17 | 6544 | { |
a32a8923 | 6545 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 6546 | const gdb_byte *info_ptr; |
ac298888 | 6547 | unsigned int initial_length_size, offset_size; |
43988095 | 6548 | uint16_t version; |
f4dc4d17 DE |
6549 | |
6550 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 6551 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 6552 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 6553 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
6554 | info_ptr += initial_length_size; |
6555 | ||
6556 | version = read_2_bytes (abfd, info_ptr); | |
6557 | info_ptr += 2; | |
6558 | if (version >= 5) | |
6559 | { | |
6560 | /* Skip unit type and address size. */ | |
6561 | info_ptr += 2; | |
6562 | } | |
6563 | ||
9c541725 | 6564 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
6565 | } |
6566 | ||
aaa75496 JB |
6567 | /* Allocate a new partial symtab for file named NAME and mark this new |
6568 | partial symtab as being an include of PST. */ | |
6569 | ||
6570 | static void | |
d521ce57 | 6571 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
6572 | struct objfile *objfile) |
6573 | { | |
6574 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
6575 | ||
fbd9ab74 JK |
6576 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6577 | { | |
6578 | /* It shares objfile->objfile_obstack. */ | |
6579 | subpst->dirname = pst->dirname; | |
6580 | } | |
6581 | ||
a9342b62 | 6582 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
6583 | subpst->dependencies[0] = pst; |
6584 | subpst->number_of_dependencies = 1; | |
6585 | ||
aaa75496 | 6586 | subpst->read_symtab = pst->read_symtab; |
aaa75496 JB |
6587 | |
6588 | /* No private part is necessary for include psymtabs. This property | |
6589 | can be used to differentiate between such include psymtabs and | |
10b3939b | 6590 | the regular ones. */ |
58a9656e | 6591 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
6592 | } |
6593 | ||
6594 | /* Read the Line Number Program data and extract the list of files | |
6595 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6596 | partial symtab for each of these included files. */ |
aaa75496 JB |
6597 | |
6598 | static void | |
6599 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
6600 | struct die_info *die, |
6601 | struct partial_symtab *pst) | |
aaa75496 | 6602 | { |
fff8551c | 6603 | line_header_up lh; |
d85a05f0 | 6604 | struct attribute *attr; |
aaa75496 | 6605 | |
d85a05f0 DJ |
6606 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
6607 | if (attr) | |
9c541725 | 6608 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6609 | if (lh == NULL) |
6610 | return; /* No linetable, so no includes. */ | |
6611 | ||
79748972 TT |
6612 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
6613 | that we pass in the raw text_low here; that is ok because we're | |
6614 | only decoding the line table to make include partial symtabs, and | |
6615 | so the addresses aren't really used. */ | |
4ae976d1 | 6616 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 6617 | pst->raw_text_low (), 1); |
aaa75496 JB |
6618 | } |
6619 | ||
348e048f | 6620 | static hashval_t |
52dc124a | 6621 | hash_signatured_type (const void *item) |
348e048f | 6622 | { |
9a3c8263 SM |
6623 | const struct signatured_type *sig_type |
6624 | = (const struct signatured_type *) item; | |
9a619af0 | 6625 | |
348e048f | 6626 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6627 | return sig_type->signature; |
348e048f DE |
6628 | } |
6629 | ||
6630 | static int | |
52dc124a | 6631 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6632 | { |
9a3c8263 SM |
6633 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6634 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6635 | |
348e048f DE |
6636 | return lhs->signature == rhs->signature; |
6637 | } | |
6638 | ||
1fd400ff TT |
6639 | /* Allocate a hash table for signatured types. */ |
6640 | ||
6641 | static htab_t | |
673bfd45 | 6642 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
6643 | { |
6644 | return htab_create_alloc_ex (41, | |
52dc124a DE |
6645 | hash_signatured_type, |
6646 | eq_signatured_type, | |
1fd400ff TT |
6647 | NULL, |
6648 | &objfile->objfile_obstack, | |
6649 | hashtab_obstack_allocate, | |
6650 | dummy_obstack_deallocate); | |
6651 | } | |
6652 | ||
d467dd73 | 6653 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6654 | |
6655 | static int | |
d467dd73 | 6656 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6657 | { |
9a3c8263 | 6658 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6659 | std::vector<signatured_type *> *all_type_units |
6660 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6661 | |
b2bdb8cf | 6662 | all_type_units->push_back (sigt); |
1fd400ff TT |
6663 | |
6664 | return 1; | |
6665 | } | |
6666 | ||
78d4d2c5 | 6667 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6668 | and fill them into TYPES_HTAB. It will process only type units, |
6669 | therefore DW_UT_type. */ | |
c88ee1f0 | 6670 | |
78d4d2c5 | 6671 | static void |
ed2dc618 SM |
6672 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6673 | struct dwo_file *dwo_file, | |
43988095 JK |
6674 | dwarf2_section_info *section, htab_t &types_htab, |
6675 | rcuh_kind section_kind) | |
348e048f | 6676 | { |
3019eac3 | 6677 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6678 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6679 | bfd *abfd; |
6680 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6681 | |
4bdcc0c1 DE |
6682 | abbrev_section = (dwo_file != NULL |
6683 | ? &dwo_file->sections.abbrev | |
6684 | : &dwarf2_per_objfile->abbrev); | |
6685 | ||
b4f54984 | 6686 | if (dwarf_read_debug) |
43988095 JK |
6687 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
6688 | get_section_name (section), | |
a32a8923 | 6689 | get_section_file_name (abbrev_section)); |
09406207 | 6690 | |
78d4d2c5 JK |
6691 | dwarf2_read_section (objfile, section); |
6692 | info_ptr = section->buffer; | |
348e048f | 6693 | |
78d4d2c5 JK |
6694 | if (info_ptr == NULL) |
6695 | return; | |
348e048f | 6696 | |
78d4d2c5 JK |
6697 | /* We can't set abfd until now because the section may be empty or |
6698 | not present, in which case the bfd is unknown. */ | |
6699 | abfd = get_section_bfd_owner (section); | |
348e048f | 6700 | |
78d4d2c5 JK |
6701 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
6702 | because we don't need to read any dies: the signature is in the | |
6703 | header. */ | |
3019eac3 | 6704 | |
78d4d2c5 JK |
6705 | end_ptr = info_ptr + section->size; |
6706 | while (info_ptr < end_ptr) | |
6707 | { | |
78d4d2c5 JK |
6708 | struct signatured_type *sig_type; |
6709 | struct dwo_unit *dwo_tu; | |
6710 | void **slot; | |
6711 | const gdb_byte *ptr = info_ptr; | |
6712 | struct comp_unit_head header; | |
6713 | unsigned int length; | |
8b70b953 | 6714 | |
9c541725 | 6715 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6716 | |
a49dd8dd JK |
6717 | /* Initialize it due to a false compiler warning. */ |
6718 | header.signature = -1; | |
9c541725 | 6719 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6720 | |
78d4d2c5 JK |
6721 | /* We need to read the type's signature in order to build the hash |
6722 | table, but we don't need anything else just yet. */ | |
348e048f | 6723 | |
ed2dc618 | 6724 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6725 | abbrev_section, ptr, section_kind); |
348e048f | 6726 | |
78d4d2c5 | 6727 | length = get_cu_length (&header); |
6caca83c | 6728 | |
78d4d2c5 JK |
6729 | /* Skip dummy type units. */ |
6730 | if (ptr >= info_ptr + length | |
43988095 JK |
6731 | || peek_abbrev_code (abfd, ptr) == 0 |
6732 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6733 | { |
6734 | info_ptr += length; | |
6735 | continue; | |
6736 | } | |
dee91e82 | 6737 | |
78d4d2c5 JK |
6738 | if (types_htab == NULL) |
6739 | { | |
6740 | if (dwo_file) | |
6741 | types_htab = allocate_dwo_unit_table (objfile); | |
6742 | else | |
6743 | types_htab = allocate_signatured_type_table (objfile); | |
6744 | } | |
8b70b953 | 6745 | |
78d4d2c5 JK |
6746 | if (dwo_file) |
6747 | { | |
6748 | sig_type = NULL; | |
6749 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6750 | struct dwo_unit); | |
6751 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6752 | dwo_tu->signature = header.signature; |
9c541725 | 6753 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6754 | dwo_tu->section = section; |
9c541725 | 6755 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6756 | dwo_tu->length = length; |
6757 | } | |
6758 | else | |
6759 | { | |
6760 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6761 | The real type_offset is in the DWO file. */ | |
6762 | dwo_tu = NULL; | |
6763 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6764 | struct signatured_type); | |
43988095 | 6765 | sig_type->signature = header.signature; |
9c541725 | 6766 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6767 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6768 | sig_type->per_cu.is_debug_types = 1; |
6769 | sig_type->per_cu.section = section; | |
9c541725 | 6770 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6771 | sig_type->per_cu.length = length; |
6772 | } | |
6773 | ||
6774 | slot = htab_find_slot (types_htab, | |
6775 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
6776 | INSERT); | |
6777 | gdb_assert (slot != NULL); | |
6778 | if (*slot != NULL) | |
6779 | { | |
9c541725 | 6780 | sect_offset dup_sect_off; |
0349ea22 | 6781 | |
3019eac3 DE |
6782 | if (dwo_file) |
6783 | { | |
78d4d2c5 JK |
6784 | const struct dwo_unit *dup_tu |
6785 | = (const struct dwo_unit *) *slot; | |
6786 | ||
9c541725 | 6787 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6788 | } |
6789 | else | |
6790 | { | |
78d4d2c5 JK |
6791 | const struct signatured_type *dup_tu |
6792 | = (const struct signatured_type *) *slot; | |
6793 | ||
9c541725 | 6794 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6795 | } |
8b70b953 | 6796 | |
b98664d3 | 6797 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6798 | " the entry at offset %s, signature %s"), |
6799 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6800 | hex_string (header.signature)); |
78d4d2c5 JK |
6801 | } |
6802 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6803 | |
78d4d2c5 | 6804 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6805 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6806 | sect_offset_str (sect_off), | |
43988095 | 6807 | hex_string (header.signature)); |
3019eac3 | 6808 | |
78d4d2c5 JK |
6809 | info_ptr += length; |
6810 | } | |
6811 | } | |
3019eac3 | 6812 | |
78d4d2c5 JK |
6813 | /* Create the hash table of all entries in the .debug_types |
6814 | (or .debug_types.dwo) section(s). | |
6815 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6816 | otherwise it is NULL. | |
b3c8eb43 | 6817 | |
78d4d2c5 | 6818 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6819 | |
78d4d2c5 | 6820 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6821 | |
78d4d2c5 | 6822 | static void |
ed2dc618 SM |
6823 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6824 | struct dwo_file *dwo_file, | |
fd5866f6 | 6825 | gdb::array_view<dwarf2_section_info> type_sections, |
78d4d2c5 JK |
6826 | htab_t &types_htab) |
6827 | { | |
fd5866f6 SM |
6828 | for (dwarf2_section_info §ion : type_sections) |
6829 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6830 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6831 | } |
6832 | ||
6833 | /* Create the hash table of all entries in the .debug_types section, | |
6834 | and initialize all_type_units. | |
6835 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6836 | otherwise non-zero. */ | |
6837 | ||
6838 | static int | |
ed2dc618 | 6839 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6840 | { |
78d4d2c5 | 6841 | htab_t types_htab = NULL; |
3019eac3 | 6842 | |
ed2dc618 SM |
6843 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6844 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6845 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6846 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6847 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6848 | if (types_htab == NULL) |
6849 | { | |
6850 | dwarf2_per_objfile->signatured_types = NULL; | |
6851 | return 0; | |
6852 | } | |
6853 | ||
348e048f DE |
6854 | dwarf2_per_objfile->signatured_types = types_htab; |
6855 | ||
b2bdb8cf SM |
6856 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
6857 | dwarf2_per_objfile->all_type_units.reserve (htab_elements (types_htab)); | |
6858 | ||
6859 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, | |
6860 | &dwarf2_per_objfile->all_type_units); | |
1fd400ff | 6861 | |
348e048f DE |
6862 | return 1; |
6863 | } | |
6864 | ||
6aa5f3a6 DE |
6865 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6866 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6867 | Otherwise we find one. */ | |
6868 | ||
6869 | static struct signatured_type * | |
ed2dc618 SM |
6870 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6871 | void **slot) | |
6aa5f3a6 DE |
6872 | { |
6873 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6874 | |
b2bdb8cf SM |
6875 | if (dwarf2_per_objfile->all_type_units.size () |
6876 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6877 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6878 | |
b2bdb8cf SM |
6879 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6880 | struct signatured_type); | |
6881 | ||
6882 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6883 | sig_type->signature = sig; |
6884 | sig_type->per_cu.is_debug_types = 1; | |
6885 | if (dwarf2_per_objfile->using_index) | |
6886 | { | |
6887 | sig_type->per_cu.v.quick = | |
6888 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6889 | struct dwarf2_per_cu_quick_data); | |
6890 | } | |
6891 | ||
6892 | if (slot == NULL) | |
6893 | { | |
6894 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6895 | sig_type, INSERT); | |
6896 | } | |
6897 | gdb_assert (*slot == NULL); | |
6898 | *slot = sig_type; | |
6899 | /* The rest of sig_type must be filled in by the caller. */ | |
6900 | return sig_type; | |
6901 | } | |
6902 | ||
a2ce51a0 DE |
6903 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6904 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6905 | ||
6906 | static void | |
ed2dc618 | 6907 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6908 | struct signatured_type *sig_entry, |
6909 | struct dwo_unit *dwo_entry) | |
6910 | { | |
7ee85ab1 | 6911 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6912 | gdb_assert (! sig_entry->per_cu.queued); |
6913 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6914 | if (dwarf2_per_objfile->using_index) |
6915 | { | |
6916 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6917 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6918 | } |
6919 | else | |
6920 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6921 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6922 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6923 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6924 | gdb_assert (sig_entry->dwo_unit == NULL); |
6925 | ||
6926 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6927 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6928 | sig_entry->per_cu.length = dwo_entry->length; |
6929 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6930 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6931 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6932 | sig_entry->dwo_unit = dwo_entry; | |
6933 | } | |
6934 | ||
6935 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6936 | If we haven't read the TU yet, create the signatured_type data structure |
6937 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6938 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6939 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6940 | containing that CU. Otherwise we could end up reading several other DWO | |
6941 | files (due to comdat folding) to process the transitive closure of all the | |
6942 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6943 | type signature that it needs. | |
a2ce51a0 DE |
6944 | We only do this for .gdb_index because in the psymtab case we already have |
6945 | to read all the DWOs to build the type unit groups. */ | |
6946 | ||
6947 | static struct signatured_type * | |
6948 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6949 | { | |
518817b3 SM |
6950 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6951 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6952 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6953 | struct dwo_file *dwo_file; | |
6954 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6955 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6956 | void **slot; |
a2ce51a0 DE |
6957 | |
6958 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6959 | ||
6aa5f3a6 DE |
6960 | /* If TU skeletons have been removed then we may not have read in any |
6961 | TUs yet. */ | |
6962 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6963 | { | |
6964 | dwarf2_per_objfile->signatured_types | |
6965 | = allocate_signatured_type_table (objfile); | |
6966 | } | |
a2ce51a0 DE |
6967 | |
6968 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6969 | Use the global signatured_types array to do our own comdat-folding |
6970 | of types. If this is the first time we're reading this TU, and | |
6971 | the TU has an entry in .gdb_index, replace the recorded data from | |
6972 | .gdb_index with this TU. */ | |
a2ce51a0 | 6973 | |
a2ce51a0 | 6974 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
6975 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
6976 | &find_sig_entry, INSERT); | |
9a3c8263 | 6977 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6978 | |
6979 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6980 | read. Don't reassign the global entry to point to this DWO if that's |
6981 | the case. Also note that if the TU is already being read, it may not | |
6982 | have come from a DWO, the program may be a mix of Fission-compiled | |
6983 | code and non-Fission-compiled code. */ | |
6984 | ||
6985 | /* Have we already tried to read this TU? | |
6986 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6987 | needn't exist in the global table yet). */ | |
6988 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6989 | return sig_entry; |
6990 | ||
6aa5f3a6 DE |
6991 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6992 | dwo_unit of the TU itself. */ | |
6993 | dwo_file = cu->dwo_unit->dwo_file; | |
6994 | ||
a2ce51a0 DE |
6995 | /* Ok, this is the first time we're reading this TU. */ |
6996 | if (dwo_file->tus == NULL) | |
6997 | return NULL; | |
6998 | find_dwo_entry.signature = sig; | |
9a3c8263 | 6999 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
7000 | if (dwo_entry == NULL) |
7001 | return NULL; | |
7002 | ||
6aa5f3a6 DE |
7003 | /* If the global table doesn't have an entry for this TU, add one. */ |
7004 | if (sig_entry == NULL) | |
ed2dc618 | 7005 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 7006 | |
ed2dc618 | 7007 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 7008 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
7009 | return sig_entry; |
7010 | } | |
7011 | ||
a2ce51a0 DE |
7012 | /* Subroutine of lookup_signatured_type. |
7013 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
7014 | then try the DWP file. If the TU stub (skeleton) has been removed then |
7015 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
7016 | |
7017 | static struct signatured_type * | |
7018 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7019 | { | |
518817b3 SM |
7020 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7021 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 | 7022 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ed2dc618 | 7023 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
7024 | struct dwo_unit *dwo_entry; |
7025 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7026 | void **slot; |
a2ce51a0 DE |
7027 | |
7028 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7029 | gdb_assert (dwp_file != NULL); | |
7030 | ||
6aa5f3a6 DE |
7031 | /* If TU skeletons have been removed then we may not have read in any |
7032 | TUs yet. */ | |
7033 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 7034 | { |
6aa5f3a6 DE |
7035 | dwarf2_per_objfile->signatured_types |
7036 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
7037 | } |
7038 | ||
6aa5f3a6 DE |
7039 | find_sig_entry.signature = sig; |
7040 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
7041 | &find_sig_entry, INSERT); | |
9a3c8263 | 7042 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
7043 | |
7044 | /* Have we already tried to read this TU? | |
7045 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7046 | needn't exist in the global table yet). */ | |
7047 | if (sig_entry != NULL) | |
7048 | return sig_entry; | |
7049 | ||
a2ce51a0 DE |
7050 | if (dwp_file->tus == NULL) |
7051 | return NULL; | |
ed2dc618 | 7052 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 7053 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
7054 | if (dwo_entry == NULL) |
7055 | return NULL; | |
7056 | ||
ed2dc618 SM |
7057 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
7058 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 7059 | |
a2ce51a0 DE |
7060 | return sig_entry; |
7061 | } | |
7062 | ||
380bca97 | 7063 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
7064 | Returns NULL if signature SIG is not present in the table. |
7065 | It is up to the caller to complain about this. */ | |
348e048f DE |
7066 | |
7067 | static struct signatured_type * | |
a2ce51a0 | 7068 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 7069 | { |
518817b3 SM |
7070 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7071 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 7072 | |
a2ce51a0 DE |
7073 | if (cu->dwo_unit |
7074 | && dwarf2_per_objfile->using_index) | |
7075 | { | |
7076 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
7077 | These cases require special processing. */ | |
ed2dc618 | 7078 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
7079 | return lookup_dwo_signatured_type (cu, sig); |
7080 | else | |
7081 | return lookup_dwp_signatured_type (cu, sig); | |
7082 | } | |
7083 | else | |
7084 | { | |
7085 | struct signatured_type find_entry, *entry; | |
348e048f | 7086 | |
a2ce51a0 DE |
7087 | if (dwarf2_per_objfile->signatured_types == NULL) |
7088 | return NULL; | |
7089 | find_entry.signature = sig; | |
9a3c8263 SM |
7090 | entry = ((struct signatured_type *) |
7091 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
7092 | return entry; |
7093 | } | |
348e048f | 7094 | } |
42e7ad6c DE |
7095 | \f |
7096 | /* Low level DIE reading support. */ | |
348e048f | 7097 | |
d85a05f0 DJ |
7098 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
7099 | ||
7100 | static void | |
7101 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 7102 | struct dwarf2_cu *cu, |
3019eac3 | 7103 | struct dwarf2_section_info *section, |
685af9cd TT |
7104 | struct dwo_file *dwo_file, |
7105 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 7106 | { |
fceca515 | 7107 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 7108 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 7109 | reader->cu = cu; |
3019eac3 | 7110 | reader->dwo_file = dwo_file; |
dee91e82 DE |
7111 | reader->die_section = section; |
7112 | reader->buffer = section->buffer; | |
f664829e | 7113 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 7114 | reader->comp_dir = NULL; |
685af9cd | 7115 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
7116 | } |
7117 | ||
b0c7bfa9 DE |
7118 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7119 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
7120 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
7121 | already. | |
7122 | ||
7123 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
7124 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
7125 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
7126 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
7127 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
7128 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
7129 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
7130 | are filled in with the info of the DIE from the DWO file. | |
685af9cd TT |
7131 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
7132 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
7133 | kept around for at least as long as *RESULT_READER. | |
7134 | ||
b0c7bfa9 DE |
7135 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
7136 | ||
7137 | static int | |
7138 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
7139 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 7140 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 7141 | const char *stub_comp_dir, |
b0c7bfa9 | 7142 | struct die_reader_specs *result_reader, |
d521ce57 | 7143 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 7144 | struct die_info **result_comp_unit_die, |
685af9cd TT |
7145 | int *result_has_children, |
7146 | abbrev_table_up *result_dwo_abbrev_table) | |
b0c7bfa9 | 7147 | { |
ed2dc618 | 7148 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
7149 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7150 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 7151 | bfd *abfd; |
d521ce57 | 7152 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
7153 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
7154 | int i,num_extra_attrs; | |
7155 | struct dwarf2_section_info *dwo_abbrev_section; | |
7156 | struct attribute *attr; | |
7157 | struct die_info *comp_unit_die; | |
7158 | ||
b0aeadb3 DE |
7159 | /* At most one of these may be provided. */ |
7160 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 7161 | |
b0c7bfa9 DE |
7162 | /* These attributes aren't processed until later: |
7163 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
7164 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
7165 | referenced later. However, these attributes are found in the stub | |
7166 | which we won't have later. In order to not impose this complication | |
7167 | on the rest of the code, we read them here and copy them to the | |
7168 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
7169 | |
7170 | stmt_list = NULL; | |
7171 | low_pc = NULL; | |
7172 | high_pc = NULL; | |
7173 | ranges = NULL; | |
7174 | comp_dir = NULL; | |
7175 | ||
7176 | if (stub_comp_unit_die != NULL) | |
7177 | { | |
7178 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
7179 | DWO file. */ | |
7180 | if (! this_cu->is_debug_types) | |
7181 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
7182 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
7183 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
7184 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
7185 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
7186 | ||
7187 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
336d760d AT |
7188 | We need the value before we can process DW_FORM_GNU_addr_index |
7189 | or DW_FORM_addrx. */ | |
b0c7bfa9 DE |
7190 | cu->addr_base = 0; |
7191 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
7192 | if (attr) | |
7193 | cu->addr_base = DW_UNSND (attr); | |
7194 | ||
7195 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
7196 | We need the value before we can process DW_AT_ranges. */ | |
7197 | cu->ranges_base = 0; | |
7198 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
7199 | if (attr) | |
7200 | cu->ranges_base = DW_UNSND (attr); | |
7201 | } | |
a2ce51a0 DE |
7202 | else if (stub_comp_dir != NULL) |
7203 | { | |
7204 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 7205 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
7206 | comp_dir->name = DW_AT_comp_dir; |
7207 | comp_dir->form = DW_FORM_string; | |
7208 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
7209 | DW_STRING (comp_dir) = stub_comp_dir; | |
7210 | } | |
b0c7bfa9 DE |
7211 | |
7212 | /* Set up for reading the DWO CU/TU. */ | |
7213 | cu->dwo_unit = dwo_unit; | |
685af9cd | 7214 | dwarf2_section_info *section = dwo_unit->section; |
b0c7bfa9 | 7215 | dwarf2_read_section (objfile, section); |
a32a8923 | 7216 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
7217 | begin_info_ptr = info_ptr = (section->buffer |
7218 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 7219 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
7220 | |
7221 | if (this_cu->is_debug_types) | |
7222 | { | |
b0c7bfa9 DE |
7223 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
7224 | ||
ed2dc618 SM |
7225 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7226 | &cu->header, section, | |
b0c7bfa9 | 7227 | dwo_abbrev_section, |
43988095 | 7228 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 7229 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 7230 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
7231 | { |
7232 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 7233 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 7234 | hex_string (sig_type->signature), |
43988095 | 7235 | hex_string (cu->header.signature), |
9d8780f0 | 7236 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
7237 | bfd_get_filename (abfd)); |
7238 | } | |
9c541725 | 7239 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7240 | /* For DWOs coming from DWP files, we don't know the CU length |
7241 | nor the type's offset in the TU until now. */ | |
7242 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 7243 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
7244 | |
7245 | /* Establish the type offset that can be used to lookup the type. | |
7246 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
7247 | sig_type->type_offset_in_section |
7248 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
7249 | } |
7250 | else | |
7251 | { | |
ed2dc618 SM |
7252 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7253 | &cu->header, section, | |
b0c7bfa9 | 7254 | dwo_abbrev_section, |
43988095 | 7255 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 7256 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7257 | /* For DWOs coming from DWP files, we don't know the CU length |
7258 | until now. */ | |
7259 | dwo_unit->length = get_cu_length (&cu->header); | |
7260 | } | |
7261 | ||
685af9cd TT |
7262 | *result_dwo_abbrev_table |
7263 | = abbrev_table_read_table (dwarf2_per_objfile, dwo_abbrev_section, | |
7264 | cu->header.abbrev_sect_off); | |
7265 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, | |
7266 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
7267 | |
7268 | /* Read in the die, but leave space to copy over the attributes | |
7269 | from the stub. This has the benefit of simplifying the rest of | |
7270 | the code - all the work to maintain the illusion of a single | |
7271 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
7272 | num_extra_attrs = ((stmt_list != NULL) | |
7273 | + (low_pc != NULL) | |
7274 | + (high_pc != NULL) | |
7275 | + (ranges != NULL) | |
7276 | + (comp_dir != NULL)); | |
7277 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
7278 | result_has_children, num_extra_attrs); | |
7279 | ||
7280 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
7281 | comp_unit_die = *result_comp_unit_die; | |
7282 | i = comp_unit_die->num_attrs; | |
7283 | if (stmt_list != NULL) | |
7284 | comp_unit_die->attrs[i++] = *stmt_list; | |
7285 | if (low_pc != NULL) | |
7286 | comp_unit_die->attrs[i++] = *low_pc; | |
7287 | if (high_pc != NULL) | |
7288 | comp_unit_die->attrs[i++] = *high_pc; | |
7289 | if (ranges != NULL) | |
7290 | comp_unit_die->attrs[i++] = *ranges; | |
7291 | if (comp_dir != NULL) | |
7292 | comp_unit_die->attrs[i++] = *comp_dir; | |
7293 | comp_unit_die->num_attrs += num_extra_attrs; | |
7294 | ||
b4f54984 | 7295 | if (dwarf_die_debug) |
bf6af496 DE |
7296 | { |
7297 | fprintf_unfiltered (gdb_stdlog, | |
7298 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 7299 | get_section_name (section), |
bf6af496 DE |
7300 | (unsigned) (begin_info_ptr - section->buffer), |
7301 | bfd_get_filename (abfd)); | |
b4f54984 | 7302 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
7303 | } |
7304 | ||
a2ce51a0 DE |
7305 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
7306 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
7307 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
7308 | to get it via circuitous means. Blech. */ | |
7309 | if (comp_dir != NULL) | |
7310 | result_reader->comp_dir = DW_STRING (comp_dir); | |
7311 | ||
b0c7bfa9 DE |
7312 | /* Skip dummy compilation units. */ |
7313 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
7314 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
7315 | return 0; | |
7316 | ||
7317 | *result_info_ptr = info_ptr; | |
7318 | return 1; | |
7319 | } | |
7320 | ||
a084a2a6 AT |
7321 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
7322 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
7323 | signature is part of the header. */ | |
7324 | static gdb::optional<ULONGEST> | |
7325 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
7326 | { | |
7327 | if (cu->header.version >= 5) | |
7328 | return cu->header.signature; | |
7329 | struct attribute *attr; | |
7330 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
7331 | if (attr == nullptr) | |
7332 | return gdb::optional<ULONGEST> (); | |
7333 | return DW_UNSND (attr); | |
7334 | } | |
7335 | ||
b0c7bfa9 DE |
7336 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7337 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 7338 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
7339 | |
7340 | static struct dwo_unit * | |
7341 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
7342 | struct die_info *comp_unit_die) | |
7343 | { | |
7344 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
7345 | struct dwo_unit *dwo_unit; |
7346 | const char *comp_dir, *dwo_name; | |
7347 | ||
a2ce51a0 DE |
7348 | gdb_assert (cu != NULL); |
7349 | ||
b0c7bfa9 | 7350 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 7351 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 7352 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
7353 | |
7354 | if (this_cu->is_debug_types) | |
7355 | { | |
7356 | struct signatured_type *sig_type; | |
7357 | ||
7358 | /* Since this_cu is the first member of struct signatured_type, | |
7359 | we can go from a pointer to one to a pointer to the other. */ | |
7360 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
7361 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
7362 | } | |
7363 | else | |
7364 | { | |
a084a2a6 AT |
7365 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
7366 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
7367 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
7368 | " [in module %s]"), | |
e3b94546 | 7369 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 7370 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 7371 | *signature); |
b0c7bfa9 DE |
7372 | } |
7373 | ||
b0c7bfa9 DE |
7374 | return dwo_unit; |
7375 | } | |
7376 | ||
a2ce51a0 | 7377 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 | 7378 | See it for a description of the parameters. |
fcd3b13d | 7379 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 DE |
7380 | |
7381 | static void | |
6aa5f3a6 DE |
7382 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
7383 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
7384 | die_reader_func_ftype *die_reader_func, |
7385 | void *data) | |
7386 | { | |
fcd3b13d | 7387 | std::unique_ptr<dwarf2_cu> new_cu; |
a2ce51a0 | 7388 | struct signatured_type *sig_type; |
a2ce51a0 DE |
7389 | struct die_reader_specs reader; |
7390 | const gdb_byte *info_ptr; | |
7391 | struct die_info *comp_unit_die; | |
7392 | int has_children; | |
ed2dc618 | 7393 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
a2ce51a0 DE |
7394 | |
7395 | /* Verify we can do the following downcast, and that we have the | |
7396 | data we need. */ | |
7397 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
7398 | sig_type = (struct signatured_type *) this_cu; | |
7399 | gdb_assert (sig_type->dwo_unit != NULL); | |
7400 | ||
6aa5f3a6 DE |
7401 | if (use_existing_cu && this_cu->cu != NULL) |
7402 | { | |
7403 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 DE |
7404 | /* There's no need to do the rereading_dwo_cu handling that |
7405 | init_cutu_and_read_dies does since we don't read the stub. */ | |
7406 | } | |
7407 | else | |
7408 | { | |
7409 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7410 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d | 7411 | new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
7412 | } |
7413 | ||
7414 | /* A future optimization, if needed, would be to use an existing | |
7415 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
7416 | could share abbrev tables. */ | |
a2ce51a0 | 7417 | |
685af9cd TT |
7418 | /* The abbreviation table used by READER, this must live at least as long as |
7419 | READER. */ | |
7420 | abbrev_table_up dwo_abbrev_table; | |
7421 | ||
a2ce51a0 | 7422 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
a2ce51a0 DE |
7423 | NULL /* stub_comp_unit_die */, |
7424 | sig_type->dwo_unit->dwo_file->comp_dir, | |
7425 | &reader, &info_ptr, | |
685af9cd TT |
7426 | &comp_unit_die, &has_children, |
7427 | &dwo_abbrev_table) == 0) | |
a2ce51a0 DE |
7428 | { |
7429 | /* Dummy die. */ | |
a2ce51a0 DE |
7430 | return; |
7431 | } | |
7432 | ||
7433 | /* All the "real" work is done here. */ | |
7434 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
7435 | ||
6aa5f3a6 | 7436 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
7437 | but the alternative is making the latter more complex. |
7438 | This function is only for the special case of using DWO files directly: | |
7439 | no point in overly complicating the general case just to handle this. */ | |
fcd3b13d | 7440 | if (new_cu != NULL && keep) |
a2ce51a0 | 7441 | { |
fcd3b13d SM |
7442 | /* Link this CU into read_in_chain. */ |
7443 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7444 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7445 | /* The chain owns it now. */ | |
7446 | new_cu.release (); | |
a2ce51a0 | 7447 | } |
a2ce51a0 DE |
7448 | } |
7449 | ||
fd820528 | 7450 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 7451 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 7452 | |
f4dc4d17 DE |
7453 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
7454 | Otherwise the table specified in the comp unit header is read in and used. | |
7455 | This is an optimization for when we already have the abbrev table. | |
7456 | ||
dee91e82 DE |
7457 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
7458 | Otherwise, a new CU is allocated with xmalloc. | |
7459 | ||
7460 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
7461 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
7462 | ||
7463 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 7464 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 7465 | |
70221824 | 7466 | static void |
fd820528 | 7467 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 7468 | struct abbrev_table *abbrev_table, |
fd820528 | 7469 | int use_existing_cu, int keep, |
58f0c718 | 7470 | bool skip_partial, |
fd820528 DE |
7471 | die_reader_func_ftype *die_reader_func, |
7472 | void *data) | |
c906108c | 7473 | { |
ed2dc618 | 7474 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7475 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7476 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7477 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 7478 | struct dwarf2_cu *cu; |
d521ce57 | 7479 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7480 | struct die_reader_specs reader; |
d85a05f0 | 7481 | struct die_info *comp_unit_die; |
dee91e82 | 7482 | int has_children; |
dee91e82 | 7483 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 7484 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
7485 | /* Non-zero if CU currently points to a DWO file and we need to |
7486 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 7487 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 7488 | int rereading_dwo_cu = 0; |
c906108c | 7489 | |
b4f54984 | 7490 | if (dwarf_die_debug) |
9d8780f0 | 7491 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7492 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7493 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7494 | |
dee91e82 DE |
7495 | if (use_existing_cu) |
7496 | gdb_assert (keep); | |
23745b47 | 7497 | |
a2ce51a0 DE |
7498 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
7499 | file (instead of going through the stub), short-circuit all of this. */ | |
7500 | if (this_cu->reading_dwo_directly) | |
7501 | { | |
7502 | /* Narrow down the scope of possibilities to have to understand. */ | |
7503 | gdb_assert (this_cu->is_debug_types); | |
7504 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
7505 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
7506 | die_reader_func, data); | |
a2ce51a0 DE |
7507 | return; |
7508 | } | |
7509 | ||
dee91e82 DE |
7510 | /* This is cheap if the section is already read in. */ |
7511 | dwarf2_read_section (objfile, section); | |
7512 | ||
9c541725 | 7513 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
7514 | |
7515 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 7516 | |
fcd3b13d | 7517 | std::unique_ptr<dwarf2_cu> new_cu; |
dee91e82 DE |
7518 | if (use_existing_cu && this_cu->cu != NULL) |
7519 | { | |
7520 | cu = this_cu->cu; | |
42e7ad6c DE |
7521 | /* If this CU is from a DWO file we need to start over, we need to |
7522 | refetch the attributes from the skeleton CU. | |
7523 | This could be optimized by retrieving those attributes from when we | |
7524 | were here the first time: the previous comp_unit_die was stored in | |
7525 | comp_unit_obstack. But there's no data yet that we need this | |
7526 | optimization. */ | |
7527 | if (cu->dwo_unit != NULL) | |
7528 | rereading_dwo_cu = 1; | |
dee91e82 DE |
7529 | } |
7530 | else | |
7531 | { | |
7532 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7533 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d SM |
7534 | new_cu.reset (new dwarf2_cu (this_cu)); |
7535 | cu = new_cu.get (); | |
42e7ad6c | 7536 | } |
dee91e82 | 7537 | |
b0c7bfa9 | 7538 | /* Get the header. */ |
9c541725 | 7539 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
7540 | { |
7541 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 7542 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
7543 | } |
7544 | else | |
7545 | { | |
3019eac3 | 7546 | if (this_cu->is_debug_types) |
dee91e82 | 7547 | { |
ed2dc618 SM |
7548 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7549 | &cu->header, section, | |
4bdcc0c1 | 7550 | abbrev_section, info_ptr, |
43988095 | 7551 | rcuh_kind::TYPE); |
dee91e82 | 7552 | |
42e7ad6c DE |
7553 | /* Since per_cu is the first member of struct signatured_type, |
7554 | we can go from a pointer to one to a pointer to the other. */ | |
7555 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 7556 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
7557 | gdb_assert (sig_type->type_offset_in_tu |
7558 | == cu->header.type_cu_offset_in_tu); | |
7559 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 7560 | |
42e7ad6c DE |
7561 | /* LENGTH has not been set yet for type units if we're |
7562 | using .gdb_index. */ | |
1ce1cefd | 7563 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
7564 | |
7565 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
7566 | sig_type->type_offset_in_section = |
7567 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
7568 | |
7569 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
7570 | } |
7571 | else | |
7572 | { | |
ed2dc618 SM |
7573 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7574 | &cu->header, section, | |
4bdcc0c1 | 7575 | abbrev_section, |
43988095 JK |
7576 | info_ptr, |
7577 | rcuh_kind::COMPILE); | |
dee91e82 | 7578 | |
9c541725 | 7579 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 7580 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 7581 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
7582 | } |
7583 | } | |
10b3939b | 7584 | |
6caca83c | 7585 | /* Skip dummy compilation units. */ |
dee91e82 | 7586 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 7587 | || peek_abbrev_code (abfd, info_ptr) == 0) |
fcd3b13d | 7588 | return; |
6caca83c | 7589 | |
433df2d4 DE |
7590 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
7591 | And if we need to read them now, make sure they're freed when we're | |
685af9cd TT |
7592 | done (own the table through ABBREV_TABLE_HOLDER). */ |
7593 | abbrev_table_up abbrev_table_holder; | |
f4dc4d17 | 7594 | if (abbrev_table != NULL) |
685af9cd TT |
7595 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
7596 | else | |
f4dc4d17 | 7597 | { |
685af9cd TT |
7598 | abbrev_table_holder |
7599 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7600 | cu->header.abbrev_sect_off); | |
7601 | abbrev_table = abbrev_table_holder.get (); | |
42e7ad6c | 7602 | } |
af703f96 | 7603 | |
dee91e82 | 7604 | /* Read the top level CU/TU die. */ |
685af9cd | 7605 | init_cu_die_reader (&reader, cu, section, NULL, abbrev_table); |
dee91e82 | 7606 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 7607 | |
58f0c718 TT |
7608 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
7609 | return; | |
7610 | ||
b0c7bfa9 | 7611 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
7612 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
7613 | table from the DWO file and pass the ownership over to us. It will be | |
7614 | referenced from READER, so we must make sure to free it after we're done | |
7615 | with READER. | |
7616 | ||
b0c7bfa9 DE |
7617 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
7618 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 7619 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
685af9cd | 7620 | abbrev_table_up dwo_abbrev_table; |
a084a2a6 | 7621 | if (dwo_name != nullptr) |
3019eac3 | 7622 | { |
3019eac3 | 7623 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7624 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
7625 | |
7626 | if (has_children) | |
6a506a2d | 7627 | { |
b98664d3 | 7628 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
7629 | " has children (offset %s) [in module %s]"), |
7630 | sect_offset_str (this_cu->sect_off), | |
7631 | bfd_get_filename (abfd)); | |
6a506a2d | 7632 | } |
b0c7bfa9 | 7633 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 7634 | if (dwo_unit != NULL) |
3019eac3 | 7635 | { |
6a506a2d | 7636 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 7637 | comp_unit_die, NULL, |
6a506a2d | 7638 | &reader, &info_ptr, |
685af9cd TT |
7639 | &dwo_comp_unit_die, &has_children, |
7640 | &dwo_abbrev_table) == 0) | |
6a506a2d DE |
7641 | { |
7642 | /* Dummy die. */ | |
6a506a2d DE |
7643 | return; |
7644 | } | |
7645 | comp_unit_die = dwo_comp_unit_die; | |
7646 | } | |
7647 | else | |
7648 | { | |
7649 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7650 | the stub. A complaint has already been logged. There's | |
7651 | not much more we can do except pass on the stub DIE to | |
7652 | die_reader_func. We don't want to throw an error on bad | |
7653 | debug info. */ | |
3019eac3 DE |
7654 | } |
7655 | } | |
7656 | ||
b0c7bfa9 | 7657 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
7658 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
7659 | ||
b0c7bfa9 | 7660 | /* Done, clean up. */ |
fcd3b13d | 7661 | if (new_cu != NULL && keep) |
348e048f | 7662 | { |
fcd3b13d SM |
7663 | /* Link this CU into read_in_chain. */ |
7664 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7665 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7666 | /* The chain owns it now. */ | |
7667 | new_cu.release (); | |
348e048f | 7668 | } |
dee91e82 DE |
7669 | } |
7670 | ||
33e80786 DE |
7671 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
7672 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
7673 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7674 | |
7675 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7676 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7677 | |
7678 | We fill in THIS_CU->length. | |
7679 | ||
7680 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
7681 | linker) then DIE_READER_FUNC will not get called. | |
7682 | ||
7683 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7684 | This is done in order to not leave THIS_CU->cu in a state where we have |
7685 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
7686 | |
7687 | static void | |
7688 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 7689 | struct dwo_file *dwo_file, |
dee91e82 DE |
7690 | die_reader_func_ftype *die_reader_func, |
7691 | void *data) | |
7692 | { | |
ed2dc618 | 7693 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7694 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7695 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7696 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 7697 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7698 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7699 | struct die_reader_specs reader; |
dee91e82 DE |
7700 | struct die_info *comp_unit_die; |
7701 | int has_children; | |
7702 | ||
b4f54984 | 7703 | if (dwarf_die_debug) |
9d8780f0 | 7704 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7705 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7706 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7707 | |
dee91e82 DE |
7708 | gdb_assert (this_cu->cu == NULL); |
7709 | ||
33e80786 DE |
7710 | abbrev_section = (dwo_file != NULL |
7711 | ? &dwo_file->sections.abbrev | |
7712 | : get_abbrev_section_for_cu (this_cu)); | |
7713 | ||
dee91e82 DE |
7714 | /* This is cheap if the section is already read in. */ |
7715 | dwarf2_read_section (objfile, section); | |
7716 | ||
fcd3b13d | 7717 | struct dwarf2_cu cu (this_cu); |
dee91e82 | 7718 | |
9c541725 | 7719 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 SM |
7720 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7721 | &cu.header, section, | |
4bdcc0c1 | 7722 | abbrev_section, info_ptr, |
43988095 JK |
7723 | (this_cu->is_debug_types |
7724 | ? rcuh_kind::TYPE | |
7725 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7726 | |
1ce1cefd | 7727 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
7728 | |
7729 | /* Skip dummy compilation units. */ | |
7730 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7731 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
fcd3b13d | 7732 | return; |
72bf9492 | 7733 | |
685af9cd TT |
7734 | abbrev_table_up abbrev_table |
7735 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7736 | cu.header.abbrev_sect_off); | |
dee91e82 | 7737 | |
685af9cd | 7738 | init_cu_die_reader (&reader, &cu, section, dwo_file, abbrev_table.get ()); |
dee91e82 DE |
7739 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
7740 | ||
7741 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
dee91e82 DE |
7742 | } |
7743 | ||
3019eac3 DE |
7744 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
7745 | does not lookup the specified DWO file. | |
7746 | This cannot be used to read DWO files. | |
dee91e82 DE |
7747 | |
7748 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7749 | This is done in order to not leave THIS_CU->cu in a state where we have |
7750 | to care whether it refers to the "main" CU or the DWO CU. | |
7751 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
7752 | |
7753 | static void | |
7754 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
7755 | die_reader_func_ftype *die_reader_func, | |
7756 | void *data) | |
7757 | { | |
33e80786 | 7758 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 7759 | } |
0018ea6f DE |
7760 | \f |
7761 | /* Type Unit Groups. | |
dee91e82 | 7762 | |
0018ea6f DE |
7763 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7764 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7765 | so that all types coming from the same compilation (.o file) are grouped | |
7766 | together. A future step could be to put the types in the same symtab as | |
7767 | the CU the types ultimately came from. */ | |
ff013f42 | 7768 | |
f4dc4d17 DE |
7769 | static hashval_t |
7770 | hash_type_unit_group (const void *item) | |
7771 | { | |
9a3c8263 SM |
7772 | const struct type_unit_group *tu_group |
7773 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7774 | |
094b34ac | 7775 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7776 | } |
348e048f DE |
7777 | |
7778 | static int | |
f4dc4d17 | 7779 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7780 | { |
9a3c8263 SM |
7781 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7782 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7783 | |
094b34ac | 7784 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7785 | } |
348e048f | 7786 | |
f4dc4d17 DE |
7787 | /* Allocate a hash table for type unit groups. */ |
7788 | ||
7789 | static htab_t | |
ed2dc618 | 7790 | allocate_type_unit_groups_table (struct objfile *objfile) |
f4dc4d17 DE |
7791 | { |
7792 | return htab_create_alloc_ex (3, | |
7793 | hash_type_unit_group, | |
7794 | eq_type_unit_group, | |
7795 | NULL, | |
ed2dc618 | 7796 | &objfile->objfile_obstack, |
f4dc4d17 DE |
7797 | hashtab_obstack_allocate, |
7798 | dummy_obstack_deallocate); | |
7799 | } | |
dee91e82 | 7800 | |
f4dc4d17 DE |
7801 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7802 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7803 | of any one psymtab grow too big. */ | |
7804 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7805 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7806 | |
094b34ac | 7807 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7808 | Create the type_unit_group object used to hold one or more TUs. */ |
7809 | ||
7810 | static struct type_unit_group * | |
094b34ac | 7811 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7812 | { |
518817b3 SM |
7813 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7814 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7815 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7816 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7817 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7818 | |
7819 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7820 | struct type_unit_group); | |
094b34ac | 7821 | per_cu = &tu_group->per_cu; |
518817b3 | 7822 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7823 | |
094b34ac DE |
7824 | if (dwarf2_per_objfile->using_index) |
7825 | { | |
7826 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7827 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7828 | } |
7829 | else | |
7830 | { | |
9c541725 | 7831 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac | 7832 | struct partial_symtab *pst; |
528e1572 | 7833 | std::string name; |
094b34ac DE |
7834 | |
7835 | /* Give the symtab a useful name for debug purposes. */ | |
7836 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7837 | name = string_printf ("<type_units_%d>", |
7838 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7839 | else |
528e1572 | 7840 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7841 | |
528e1572 | 7842 | pst = create_partial_symtab (per_cu, name.c_str ()); |
094b34ac | 7843 | pst->anonymous = 1; |
094b34ac | 7844 | } |
f4dc4d17 | 7845 | |
094b34ac | 7846 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7847 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7848 | |
7849 | return tu_group; | |
7850 | } | |
7851 | ||
094b34ac DE |
7852 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7853 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7854 | |
7855 | static struct type_unit_group * | |
ff39bb5e | 7856 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7857 | { |
518817b3 SM |
7858 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7859 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7860 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7861 | struct type_unit_group *tu_group; | |
7862 | void **slot; | |
7863 | unsigned int line_offset; | |
7864 | struct type_unit_group type_unit_group_for_lookup; | |
7865 | ||
7866 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
7867 | { | |
7868 | dwarf2_per_objfile->type_unit_groups = | |
ed2dc618 | 7869 | allocate_type_unit_groups_table (dwarf2_per_objfile->objfile); |
f4dc4d17 DE |
7870 | } |
7871 | ||
7872 | /* Do we need to create a new group, or can we use an existing one? */ | |
7873 | ||
7874 | if (stmt_list) | |
7875 | { | |
7876 | line_offset = DW_UNSND (stmt_list); | |
7877 | ++tu_stats->nr_symtab_sharers; | |
7878 | } | |
7879 | else | |
7880 | { | |
7881 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7882 | We can do various things here like create one group per TU or | |
7883 | spread them over multiple groups to split up the expansion work. | |
7884 | To avoid worst case scenarios (too many groups or too large groups) | |
7885 | we, umm, group them in bunches. */ | |
7886 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7887 | | (tu_stats->nr_stmt_less_type_units | |
7888 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7889 | ++tu_stats->nr_stmt_less_type_units; | |
7890 | } | |
7891 | ||
094b34ac | 7892 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7893 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
7894 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
7895 | &type_unit_group_for_lookup, INSERT); | |
7896 | if (*slot != NULL) | |
7897 | { | |
9a3c8263 | 7898 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7899 | gdb_assert (tu_group != NULL); |
7900 | } | |
7901 | else | |
7902 | { | |
9c541725 | 7903 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7904 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7905 | *slot = tu_group; |
7906 | ++tu_stats->nr_symtabs; | |
7907 | } | |
7908 | ||
7909 | return tu_group; | |
7910 | } | |
0018ea6f DE |
7911 | \f |
7912 | /* Partial symbol tables. */ | |
7913 | ||
7914 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7915 | ||
7916 | The caller must fill in the following details: | |
7917 | dirname, textlow, texthigh. */ | |
7918 | ||
7919 | static struct partial_symtab * | |
7920 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
7921 | { | |
e3b94546 | 7922 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
0018ea6f DE |
7923 | struct partial_symtab *pst; |
7924 | ||
939652a5 | 7925 | pst = start_psymtab_common (objfile, name, 0); |
0018ea6f DE |
7926 | |
7927 | pst->psymtabs_addrmap_supported = 1; | |
7928 | ||
7929 | /* This is the glue that links PST into GDB's symbol API. */ | |
7930 | pst->read_symtab_private = per_cu; | |
7931 | pst->read_symtab = dwarf2_read_symtab; | |
7932 | per_cu->v.psymtab = pst; | |
7933 | ||
7934 | return pst; | |
7935 | } | |
7936 | ||
b93601f3 TT |
7937 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
7938 | type. */ | |
7939 | ||
7940 | struct process_psymtab_comp_unit_data | |
7941 | { | |
7942 | /* True if we are reading a DW_TAG_partial_unit. */ | |
7943 | ||
7944 | int want_partial_unit; | |
7945 | ||
7946 | /* The "pretend" language that is used if the CU doesn't declare a | |
7947 | language. */ | |
7948 | ||
7949 | enum language pretend_language; | |
7950 | }; | |
7951 | ||
0018ea6f DE |
7952 | /* die_reader_func for process_psymtab_comp_unit. */ |
7953 | ||
7954 | static void | |
7955 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7956 | const gdb_byte *info_ptr, |
0018ea6f DE |
7957 | struct die_info *comp_unit_die, |
7958 | int has_children, | |
7959 | void *data) | |
7960 | { | |
7961 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7962 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 7963 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7964 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7965 | CORE_ADDR baseaddr; |
7966 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
7967 | struct partial_symtab *pst; | |
3a2b436a | 7968 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7969 | const char *filename; |
9a3c8263 SM |
7970 | struct process_psymtab_comp_unit_data *info |
7971 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 7972 | |
b93601f3 | 7973 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
7974 | return; |
7975 | ||
7976 | gdb_assert (! per_cu->is_debug_types); | |
7977 | ||
b93601f3 | 7978 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f | 7979 | |
0018ea6f | 7980 | /* Allocate a new partial symbol table structure. */ |
7d45c7c3 KB |
7981 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7982 | if (filename == NULL) | |
0018ea6f | 7983 | filename = ""; |
0018ea6f DE |
7984 | |
7985 | pst = create_partial_symtab (per_cu, filename); | |
7986 | ||
7987 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7988 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
7989 | |
7990 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7991 | ||
7992 | dwarf2_find_base_address (comp_unit_die, cu); | |
7993 | ||
7994 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7995 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7996 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7997 | &best_highpc, cu, pst); | |
7998 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
7999 | { |
8000 | CORE_ADDR low | |
8001 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
8002 | - baseaddr); | |
8003 | CORE_ADDR high | |
8004 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
8005 | - baseaddr - 1); | |
8006 | /* Store the contiguous range if it is not empty; it can be | |
8007 | empty for CUs with no code. */ | |
d320c2b5 TT |
8008 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
8009 | low, high, pst); | |
79748972 | 8010 | } |
0018ea6f DE |
8011 | |
8012 | /* Check if comp unit has_children. | |
8013 | If so, read the rest of the partial symbols from this comp unit. | |
8014 | If not, there's no more debug_info for this comp unit. */ | |
8015 | if (has_children) | |
8016 | { | |
8017 | struct partial_die_info *first_die; | |
8018 | CORE_ADDR lowpc, highpc; | |
8019 | ||
8020 | lowpc = ((CORE_ADDR) -1); | |
8021 | highpc = ((CORE_ADDR) 0); | |
8022 | ||
8023 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8024 | ||
8025 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 8026 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
8027 | |
8028 | /* If we didn't find a lowpc, set it to highpc to avoid | |
8029 | complaints from `maint check'. */ | |
8030 | if (lowpc == ((CORE_ADDR) -1)) | |
8031 | lowpc = highpc; | |
8032 | ||
8033 | /* If the compilation unit didn't have an explicit address range, | |
8034 | then use the information extracted from its child dies. */ | |
e385593e | 8035 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
8036 | { |
8037 | best_lowpc = lowpc; | |
8038 | best_highpc = highpc; | |
8039 | } | |
8040 | } | |
4ae976d1 | 8041 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8042 | best_lowpc + baseaddr) |
8043 | - baseaddr); | |
4ae976d1 | 8044 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8045 | best_highpc + baseaddr) |
8046 | - baseaddr); | |
0018ea6f | 8047 | |
8763cede | 8048 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
8049 | |
8050 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
8051 | { | |
8052 | int i; | |
8053 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8054 | struct dwarf2_per_cu_data *iter; | |
8055 | ||
8056 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
8057 | post-pass. */ | |
8058 | pst->number_of_dependencies = len; | |
a9342b62 TT |
8059 | pst->dependencies |
8060 | = objfile->partial_symtabs->allocate_dependencies (len); | |
0018ea6f DE |
8061 | for (i = 0; |
8062 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
8063 | i, iter); | |
8064 | ++i) | |
8065 | pst->dependencies[i] = iter->v.psymtab; | |
8066 | ||
8067 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
8068 | } | |
8069 | ||
8070 | /* Get the list of files included in the current compilation unit, | |
8071 | and build a psymtab for each of them. */ | |
8072 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
8073 | ||
b4f54984 | 8074 | if (dwarf_read_debug) |
b926417a TT |
8075 | fprintf_unfiltered (gdb_stdlog, |
8076 | "Psymtab for %s unit @%s: %s - %s" | |
8077 | ", %d global, %d static syms\n", | |
8078 | per_cu->is_debug_types ? "type" : "comp", | |
8079 | sect_offset_str (per_cu->sect_off), | |
8080 | paddress (gdbarch, pst->text_low (objfile)), | |
8081 | paddress (gdbarch, pst->text_high (objfile)), | |
8082 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
8083 | } |
8084 | ||
8085 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8086 | Process compilation unit THIS_CU for a psymtab. */ | |
8087 | ||
8088 | static void | |
8089 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
8090 | int want_partial_unit, |
8091 | enum language pretend_language) | |
0018ea6f DE |
8092 | { |
8093 | /* If this compilation unit was already read in, free the | |
8094 | cached copy in order to read it in again. This is | |
8095 | necessary because we skipped some symbols when we first | |
8096 | read in the compilation unit (see load_partial_dies). | |
8097 | This problem could be avoided, but the benefit is unclear. */ | |
8098 | if (this_cu->cu != NULL) | |
8099 | free_one_cached_comp_unit (this_cu); | |
8100 | ||
f1902523 | 8101 | if (this_cu->is_debug_types) |
58f0c718 TT |
8102 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
8103 | build_type_psymtabs_reader, NULL); | |
f1902523 JK |
8104 | else |
8105 | { | |
8106 | process_psymtab_comp_unit_data info; | |
8107 | info.want_partial_unit = want_partial_unit; | |
8108 | info.pretend_language = pretend_language; | |
58f0c718 | 8109 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
f1902523 JK |
8110 | process_psymtab_comp_unit_reader, &info); |
8111 | } | |
0018ea6f DE |
8112 | |
8113 | /* Age out any secondary CUs. */ | |
ed2dc618 | 8114 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 8115 | } |
f4dc4d17 DE |
8116 | |
8117 | /* Reader function for build_type_psymtabs. */ | |
8118 | ||
8119 | static void | |
8120 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8121 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
8122 | struct die_info *type_unit_die, |
8123 | int has_children, | |
8124 | void *data) | |
8125 | { | |
ed2dc618 | 8126 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 8127 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
8128 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8129 | struct dwarf2_cu *cu = reader->cu; | |
8130 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 8131 | struct signatured_type *sig_type; |
f4dc4d17 DE |
8132 | struct type_unit_group *tu_group; |
8133 | struct attribute *attr; | |
8134 | struct partial_die_info *first_die; | |
8135 | CORE_ADDR lowpc, highpc; | |
8136 | struct partial_symtab *pst; | |
8137 | ||
8138 | gdb_assert (data == NULL); | |
0186c6a7 DE |
8139 | gdb_assert (per_cu->is_debug_types); |
8140 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8141 | |
8142 | if (! has_children) | |
8143 | return; | |
8144 | ||
8145 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 8146 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 8147 | |
0186c6a7 | 8148 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
8149 | |
8150 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 DE |
8151 | pst = create_partial_symtab (per_cu, ""); |
8152 | pst->anonymous = 1; | |
8153 | ||
8154 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8155 | ||
8156 | lowpc = (CORE_ADDR) -1; | |
8157 | highpc = (CORE_ADDR) 0; | |
8158 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
8159 | ||
8763cede | 8160 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
8161 | } |
8162 | ||
73051182 DE |
8163 | /* Struct used to sort TUs by their abbreviation table offset. */ |
8164 | ||
8165 | struct tu_abbrev_offset | |
8166 | { | |
b2bdb8cf SM |
8167 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
8168 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
8169 | {} | |
8170 | ||
8171 | signatured_type *sig_type; | |
73051182 DE |
8172 | sect_offset abbrev_offset; |
8173 | }; | |
8174 | ||
484cf504 | 8175 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 8176 | |
484cf504 TT |
8177 | static bool |
8178 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
8179 | const struct tu_abbrev_offset &b) | |
73051182 | 8180 | { |
484cf504 | 8181 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
8182 | } |
8183 | ||
8184 | /* Efficiently read all the type units. | |
8185 | This does the bulk of the work for build_type_psymtabs. | |
8186 | ||
8187 | The efficiency is because we sort TUs by the abbrev table they use and | |
8188 | only read each abbrev table once. In one program there are 200K TUs | |
8189 | sharing 8K abbrev tables. | |
8190 | ||
8191 | The main purpose of this function is to support building the | |
8192 | dwarf2_per_objfile->type_unit_groups table. | |
8193 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
8194 | can collapse the search space by grouping them by stmt_list. | |
8195 | The savings can be significant, in the same program from above the 200K TUs | |
8196 | share 8K stmt_list tables. | |
8197 | ||
8198 | FUNC is expected to call get_type_unit_group, which will create the | |
8199 | struct type_unit_group if necessary and add it to | |
8200 | dwarf2_per_objfile->type_unit_groups. */ | |
8201 | ||
8202 | static void | |
ed2dc618 | 8203 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 8204 | { |
73051182 | 8205 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 8206 | abbrev_table_up abbrev_table; |
73051182 | 8207 | sect_offset abbrev_offset; |
73051182 DE |
8208 | |
8209 | /* It's up to the caller to not call us multiple times. */ | |
8210 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
8211 | ||
b2bdb8cf | 8212 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
8213 | return; |
8214 | ||
8215 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
8216 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
8217 | read each abbrev table in. | |
8218 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
8219 | This is simpler and efficient enough for now. | |
8220 | ||
8221 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
8222 | symtab to use). Typically TUs with the same abbrev offset have the same | |
8223 | stmt_list value too so in practice this should work well. | |
8224 | ||
8225 | The basic algorithm here is: | |
8226 | ||
8227 | sort TUs by abbrev table | |
8228 | for each TU with same abbrev table: | |
8229 | read abbrev table if first user | |
8230 | read TU top level DIE | |
8231 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
8232 | call FUNC */ | |
8233 | ||
b4f54984 | 8234 | if (dwarf_read_debug) |
73051182 DE |
8235 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
8236 | ||
8237 | /* Sort in a separate table to maintain the order of all_type_units | |
8238 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
8239 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
8240 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
8241 | ||
8242 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
8243 | sorted_by_abbrev.emplace_back | |
8244 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
8245 | sig_type->per_cu.section, | |
8246 | sig_type->per_cu.sect_off)); | |
73051182 | 8247 | |
484cf504 TT |
8248 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
8249 | sort_tu_by_abbrev_offset); | |
73051182 | 8250 | |
9c541725 | 8251 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 8252 | |
b2bdb8cf | 8253 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 8254 | { |
73051182 DE |
8255 | /* Switch to the next abbrev table if necessary. */ |
8256 | if (abbrev_table == NULL | |
b2bdb8cf | 8257 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 8258 | { |
b2bdb8cf | 8259 | abbrev_offset = tu.abbrev_offset; |
73051182 | 8260 | abbrev_table = |
ed2dc618 SM |
8261 | abbrev_table_read_table (dwarf2_per_objfile, |
8262 | &dwarf2_per_objfile->abbrev, | |
73051182 DE |
8263 | abbrev_offset); |
8264 | ++tu_stats->nr_uniq_abbrev_tables; | |
8265 | } | |
8266 | ||
b2bdb8cf | 8267 | init_cutu_and_read_dies (&tu.sig_type->per_cu, abbrev_table.get (), |
58f0c718 | 8268 | 0, 0, false, build_type_psymtabs_reader, NULL); |
73051182 | 8269 | } |
6aa5f3a6 | 8270 | } |
73051182 | 8271 | |
6aa5f3a6 DE |
8272 | /* Print collected type unit statistics. */ |
8273 | ||
8274 | static void | |
ed2dc618 | 8275 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8276 | { |
8277 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8278 | ||
8279 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
8280 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
8281 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
8282 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
8283 | tu_stats->nr_uniq_abbrev_tables); | |
8284 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
8285 | tu_stats->nr_symtabs); | |
8286 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
8287 | tu_stats->nr_symtab_sharers); | |
8288 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
8289 | tu_stats->nr_stmt_less_type_units); | |
8290 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
8291 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
8292 | } |
8293 | ||
f4dc4d17 DE |
8294 | /* Traversal function for build_type_psymtabs. */ |
8295 | ||
8296 | static int | |
8297 | build_type_psymtab_dependencies (void **slot, void *info) | |
8298 | { | |
ed2dc618 SM |
8299 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8300 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
8301 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8302 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 8303 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 8304 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
8305 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
8306 | struct signatured_type *iter; | |
f4dc4d17 DE |
8307 | int i; |
8308 | ||
8309 | gdb_assert (len > 0); | |
0186c6a7 | 8310 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
8311 | |
8312 | pst->number_of_dependencies = len; | |
a9342b62 | 8313 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
f4dc4d17 | 8314 | for (i = 0; |
0186c6a7 | 8315 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
8316 | ++i) |
8317 | { | |
0186c6a7 DE |
8318 | gdb_assert (iter->per_cu.is_debug_types); |
8319 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 8320 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
8321 | } |
8322 | ||
0186c6a7 | 8323 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
8324 | |
8325 | return 1; | |
8326 | } | |
8327 | ||
8328 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8329 | Build partial symbol tables for the .debug_types comp-units. */ | |
8330 | ||
8331 | static void | |
ed2dc618 | 8332 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 8333 | { |
ed2dc618 | 8334 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
8335 | return; |
8336 | ||
ed2dc618 | 8337 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 8338 | } |
f4dc4d17 | 8339 | |
6aa5f3a6 DE |
8340 | /* Traversal function for process_skeletonless_type_unit. |
8341 | Read a TU in a DWO file and build partial symbols for it. */ | |
8342 | ||
8343 | static int | |
8344 | process_skeletonless_type_unit (void **slot, void *info) | |
8345 | { | |
8346 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
8347 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8348 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
8349 | struct signatured_type find_entry, *entry; |
8350 | ||
8351 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
8352 | ||
8353 | if (dwarf2_per_objfile->signatured_types == NULL) | |
8354 | { | |
8355 | dwarf2_per_objfile->signatured_types | |
ed2dc618 | 8356 | = allocate_signatured_type_table (dwarf2_per_objfile->objfile); |
6aa5f3a6 DE |
8357 | } |
8358 | ||
8359 | find_entry.signature = dwo_unit->signature; | |
8360 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
8361 | INSERT); | |
8362 | /* If we've already seen this type there's nothing to do. What's happening | |
8363 | is we're doing our own version of comdat-folding here. */ | |
8364 | if (*slot != NULL) | |
8365 | return 1; | |
8366 | ||
8367 | /* This does the job that create_all_type_units would have done for | |
8368 | this TU. */ | |
ed2dc618 SM |
8369 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
8370 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
8371 | *slot = entry; |
8372 | ||
8373 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
58f0c718 | 8374 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, false, |
6aa5f3a6 DE |
8375 | build_type_psymtabs_reader, NULL); |
8376 | ||
8377 | return 1; | |
8378 | } | |
8379 | ||
8380 | /* Traversal function for process_skeletonless_type_units. */ | |
8381 | ||
8382 | static int | |
8383 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
8384 | { | |
8385 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
8386 | ||
8387 | if (dwo_file->tus != NULL) | |
8388 | { | |
8389 | htab_traverse_noresize (dwo_file->tus, | |
8390 | process_skeletonless_type_unit, info); | |
8391 | } | |
8392 | ||
8393 | return 1; | |
8394 | } | |
8395 | ||
8396 | /* Scan all TUs of DWO files, verifying we've processed them. | |
8397 | This is needed in case a TU was emitted without its skeleton. | |
8398 | Note: This can't be done until we know what all the DWO files are. */ | |
8399 | ||
8400 | static void | |
ed2dc618 | 8401 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8402 | { |
8403 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 8404 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
8405 | && dwarf2_per_objfile->dwo_files != NULL) |
8406 | { | |
51ac9db5 | 8407 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 8408 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 8409 | dwarf2_per_objfile); |
6aa5f3a6 | 8410 | } |
348e048f DE |
8411 | } |
8412 | ||
ed2dc618 | 8413 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
8414 | |
8415 | static void | |
ed2dc618 | 8416 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 8417 | { |
b76e467d | 8418 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 8419 | { |
95554aad | 8420 | struct partial_symtab *pst = per_cu->v.psymtab; |
95554aad | 8421 | |
36586728 TT |
8422 | if (pst == NULL) |
8423 | continue; | |
8424 | ||
b76e467d | 8425 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
8426 | { |
8427 | /* Set the 'user' field only if it is not already set. */ | |
8428 | if (pst->dependencies[j]->user == NULL) | |
8429 | pst->dependencies[j]->user = pst; | |
8430 | } | |
8431 | } | |
8432 | } | |
8433 | ||
93311388 DE |
8434 | /* Build the partial symbol table by doing a quick pass through the |
8435 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 8436 | |
93311388 | 8437 | static void |
ed2dc618 | 8438 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 8439 | { |
ed2dc618 | 8440 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 8441 | |
b4f54984 | 8442 | if (dwarf_read_debug) |
45cfd468 DE |
8443 | { |
8444 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 8445 | objfile_name (objfile)); |
45cfd468 DE |
8446 | } |
8447 | ||
98bfdba5 PA |
8448 | dwarf2_per_objfile->reading_partial_symbols = 1; |
8449 | ||
be391dca | 8450 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 8451 | |
93311388 DE |
8452 | /* Any cached compilation units will be linked by the per-objfile |
8453 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 8454 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 8455 | |
ed2dc618 | 8456 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 8457 | |
ed2dc618 | 8458 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 8459 | |
60606b2c TT |
8460 | /* Create a temporary address map on a temporary obstack. We later |
8461 | copy this to the final obstack. */ | |
8268c778 | 8462 | auto_obstack temp_obstack; |
791afaa2 TT |
8463 | |
8464 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 8465 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 8466 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 8467 | |
b76e467d SM |
8468 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
8469 | process_psymtab_comp_unit (per_cu, 0, language_minimal); | |
ff013f42 | 8470 | |
6aa5f3a6 | 8471 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 8472 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
8473 | |
8474 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
8475 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
8476 | { | |
8477 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
ed2dc618 | 8478 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
8479 | } |
8480 | ||
b4f54984 | 8481 | if (dwarf_read_debug) |
ed2dc618 | 8482 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 8483 | |
ed2dc618 | 8484 | set_partial_user (dwarf2_per_objfile); |
95554aad | 8485 | |
d320c2b5 TT |
8486 | objfile->partial_symtabs->psymtabs_addrmap |
8487 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 8488 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
8489 | /* At this point we want to keep the address map. */ |
8490 | save_psymtabs_addrmap.release (); | |
ff013f42 | 8491 | |
b4f54984 | 8492 | if (dwarf_read_debug) |
45cfd468 | 8493 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 8494 | objfile_name (objfile)); |
ae038cb0 DJ |
8495 | } |
8496 | ||
3019eac3 | 8497 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
8498 | |
8499 | static void | |
dee91e82 | 8500 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 8501 | const gdb_byte *info_ptr, |
dee91e82 DE |
8502 | struct die_info *comp_unit_die, |
8503 | int has_children, | |
8504 | void *data) | |
ae038cb0 | 8505 | { |
dee91e82 | 8506 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 8507 | |
95554aad | 8508 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 8509 | |
ae038cb0 DJ |
8510 | /* Check if comp unit has_children. |
8511 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 8512 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 8513 | if (has_children) |
dee91e82 DE |
8514 | load_partial_dies (reader, info_ptr, 0); |
8515 | } | |
98bfdba5 | 8516 | |
dee91e82 DE |
8517 | /* Load the partial DIEs for a secondary CU into memory. |
8518 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 8519 | |
dee91e82 DE |
8520 | static void |
8521 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
8522 | { | |
58f0c718 | 8523 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, false, |
f4dc4d17 | 8524 | load_partial_comp_unit_reader, NULL); |
ae038cb0 DJ |
8525 | } |
8526 | ||
ae038cb0 | 8527 | static void |
ed2dc618 | 8528 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 8529 | struct dwarf2_section_info *section, |
f1902523 | 8530 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 8531 | unsigned int is_dwz) |
ae038cb0 | 8532 | { |
d521ce57 | 8533 | const gdb_byte *info_ptr; |
ed2dc618 | 8534 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 8535 | |
b4f54984 | 8536 | if (dwarf_read_debug) |
bf6af496 | 8537 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
8538 | get_section_name (section), |
8539 | get_section_file_name (section)); | |
bf6af496 | 8540 | |
36586728 | 8541 | dwarf2_read_section (objfile, section); |
ae038cb0 | 8542 | |
36586728 | 8543 | info_ptr = section->buffer; |
6e70227d | 8544 | |
36586728 | 8545 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 8546 | { |
ae038cb0 | 8547 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 8548 | |
9c541725 | 8549 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 8550 | |
f1902523 | 8551 | comp_unit_head cu_header; |
ed2dc618 SM |
8552 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
8553 | abbrev_section, info_ptr, | |
8554 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
8555 | |
8556 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
8557 | if (cu_header.unit_type != DW_UT_type) |
8558 | { | |
8559 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
8560 | struct dwarf2_per_cu_data); | |
8561 | memset (this_cu, 0, sizeof (*this_cu)); | |
8562 | } | |
8563 | else | |
8564 | { | |
8565 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
8566 | struct signatured_type); | |
8567 | memset (sig_type, 0, sizeof (*sig_type)); | |
8568 | sig_type->signature = cu_header.signature; | |
8569 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
8570 | this_cu = &sig_type->per_cu; | |
8571 | } | |
8572 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 8573 | this_cu->sect_off = sect_off; |
f1902523 | 8574 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 8575 | this_cu->is_dwz = is_dwz; |
e3b94546 | 8576 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 8577 | this_cu->section = section; |
ae038cb0 | 8578 | |
b76e467d | 8579 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
8580 | |
8581 | info_ptr = info_ptr + this_cu->length; | |
8582 | } | |
36586728 TT |
8583 | } |
8584 | ||
8585 | /* Create a list of all compilation units in OBJFILE. | |
8586 | This is only done for -readnow and building partial symtabs. */ | |
8587 | ||
8588 | static void | |
ed2dc618 | 8589 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 8590 | { |
b76e467d | 8591 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 8592 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 8593 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 8594 | |
b76e467d | 8595 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 8596 | if (dwz != NULL) |
ed2dc618 | 8597 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 8598 | 1); |
c906108c SS |
8599 | } |
8600 | ||
5734ee8b | 8601 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 8602 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 8603 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
8604 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
8605 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 8606 | |
72bf9492 DJ |
8607 | static void |
8608 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
8609 | CORE_ADDR *highpc, int set_addrmap, |
8610 | struct dwarf2_cu *cu) | |
c906108c | 8611 | { |
72bf9492 | 8612 | struct partial_die_info *pdi; |
c906108c | 8613 | |
91c24f0a DC |
8614 | /* Now, march along the PDI's, descending into ones which have |
8615 | interesting children but skipping the children of the other ones, | |
8616 | until we reach the end of the compilation unit. */ | |
c906108c | 8617 | |
72bf9492 | 8618 | pdi = first_die; |
91c24f0a | 8619 | |
72bf9492 DJ |
8620 | while (pdi != NULL) |
8621 | { | |
52356b79 | 8622 | pdi->fixup (cu); |
c906108c | 8623 | |
f55ee35c | 8624 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8625 | children, so we need to look at them. Ditto for anonymous |
8626 | enums. */ | |
933c6fe4 | 8627 | |
72bf9492 | 8628 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 8629 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
8630 | || pdi->tag == DW_TAG_imported_unit |
8631 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 8632 | { |
72bf9492 | 8633 | switch (pdi->tag) |
c906108c SS |
8634 | { |
8635 | case DW_TAG_subprogram: | |
b1dc1806 | 8636 | case DW_TAG_inlined_subroutine: |
cdc07690 | 8637 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8638 | break; |
72929c62 | 8639 | case DW_TAG_constant: |
c906108c SS |
8640 | case DW_TAG_variable: |
8641 | case DW_TAG_typedef: | |
91c24f0a | 8642 | case DW_TAG_union_type: |
72bf9492 | 8643 | if (!pdi->is_declaration) |
63d06c5c | 8644 | { |
72bf9492 | 8645 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8646 | } |
8647 | break; | |
c906108c | 8648 | case DW_TAG_class_type: |
680b30c7 | 8649 | case DW_TAG_interface_type: |
c906108c | 8650 | case DW_TAG_structure_type: |
72bf9492 | 8651 | if (!pdi->is_declaration) |
c906108c | 8652 | { |
72bf9492 | 8653 | add_partial_symbol (pdi, cu); |
c906108c | 8654 | } |
b7fee5a3 KS |
8655 | if ((cu->language == language_rust |
8656 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
8657 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
8658 | set_addrmap, cu); | |
c906108c | 8659 | break; |
91c24f0a | 8660 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8661 | if (!pdi->is_declaration) |
8662 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8663 | break; |
8664 | case DW_TAG_base_type: | |
a02abb62 | 8665 | case DW_TAG_subrange_type: |
c906108c | 8666 | /* File scope base type definitions are added to the partial |
c5aa993b | 8667 | symbol table. */ |
72bf9492 | 8668 | add_partial_symbol (pdi, cu); |
c906108c | 8669 | break; |
d9fa45fe | 8670 | case DW_TAG_namespace: |
cdc07690 | 8671 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 8672 | break; |
5d7cb8df | 8673 | case DW_TAG_module: |
cdc07690 | 8674 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 8675 | break; |
95554aad TT |
8676 | case DW_TAG_imported_unit: |
8677 | { | |
8678 | struct dwarf2_per_cu_data *per_cu; | |
8679 | ||
f4dc4d17 DE |
8680 | /* For now we don't handle imported units in type units. */ |
8681 | if (cu->per_cu->is_debug_types) | |
8682 | { | |
8683 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8684 | " supported in type units [in module %s]"), | |
518817b3 | 8685 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8686 | } |
8687 | ||
e3b94546 SM |
8688 | per_cu = dwarf2_find_containing_comp_unit |
8689 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8690 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8691 | |
8692 | /* Go read the partial unit, if needed. */ | |
8693 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 8694 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 8695 | |
f4dc4d17 | 8696 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 8697 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
8698 | } |
8699 | break; | |
74921315 KS |
8700 | case DW_TAG_imported_declaration: |
8701 | add_partial_symbol (pdi, cu); | |
8702 | break; | |
c906108c SS |
8703 | default: |
8704 | break; | |
8705 | } | |
8706 | } | |
8707 | ||
72bf9492 DJ |
8708 | /* If the die has a sibling, skip to the sibling. */ |
8709 | ||
8710 | pdi = pdi->die_sibling; | |
8711 | } | |
8712 | } | |
8713 | ||
8714 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8715 | |
72bf9492 | 8716 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8717 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8718 | Enumerators are an exception; they use the scope of their parent |
8719 | enumeration type, i.e. the name of the enumeration type is not | |
8720 | prepended to the enumerator. | |
91c24f0a | 8721 | |
72bf9492 DJ |
8722 | There are two complexities. One is DW_AT_specification; in this |
8723 | case "parent" means the parent of the target of the specification, | |
8724 | instead of the direct parent of the DIE. The other is compilers | |
8725 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8726 | the fully qualified name of structure types from their members' | |
8727 | linkage names. This must be done using the DIE's children rather | |
8728 | than the children of any DW_AT_specification target. We only need | |
8729 | to do this for structures at the top level, i.e. if the target of | |
8730 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8731 | have a parent. */ | |
8732 | ||
8733 | /* Compute the scope prefix associated with PDI's parent, in | |
8734 | compilation unit CU. The result will be allocated on CU's | |
8735 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8736 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8737 | static const char * |
72bf9492 DJ |
8738 | partial_die_parent_scope (struct partial_die_info *pdi, |
8739 | struct dwarf2_cu *cu) | |
8740 | { | |
15d034d0 | 8741 | const char *grandparent_scope; |
72bf9492 | 8742 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8743 | |
72bf9492 DJ |
8744 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8745 | then this means the parent of the specification DIE. */ | |
8746 | ||
8747 | real_pdi = pdi; | |
72bf9492 | 8748 | while (real_pdi->has_specification) |
fb816e8b | 8749 | { |
122cf0f2 AB |
8750 | auto res = find_partial_die (real_pdi->spec_offset, |
8751 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8752 | real_pdi = res.pdi; |
8753 | cu = res.cu; | |
8754 | } | |
72bf9492 DJ |
8755 | |
8756 | parent = real_pdi->die_parent; | |
8757 | if (parent == NULL) | |
8758 | return NULL; | |
8759 | ||
8760 | if (parent->scope_set) | |
8761 | return parent->scope; | |
8762 | ||
52356b79 | 8763 | parent->fixup (cu); |
72bf9492 | 8764 | |
10b3939b | 8765 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8766 | |
acebe513 UW |
8767 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8768 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8769 | Work around this problem here. */ | |
8770 | if (cu->language == language_cplus | |
6e70227d | 8771 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8772 | && strcmp (parent->name, "::") == 0 |
8773 | && grandparent_scope == NULL) | |
8774 | { | |
8775 | parent->scope = NULL; | |
8776 | parent->scope_set = 1; | |
8777 | return NULL; | |
8778 | } | |
8779 | ||
9c6c53f7 SA |
8780 | if (pdi->tag == DW_TAG_enumerator) |
8781 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8782 | parent->scope = grandparent_scope; | |
8783 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8784 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8785 | || parent->tag == DW_TAG_structure_type |
8786 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8787 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
8788 | || parent->tag == DW_TAG_union_type |
8789 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
8790 | { |
8791 | if (grandparent_scope == NULL) | |
8792 | parent->scope = parent->name; | |
8793 | else | |
3e43a32a MS |
8794 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8795 | grandparent_scope, | |
f55ee35c | 8796 | parent->name, 0, cu); |
72bf9492 | 8797 | } |
72bf9492 DJ |
8798 | else |
8799 | { | |
8800 | /* FIXME drow/2004-04-01: What should we be doing with | |
8801 | function-local names? For partial symbols, we should probably be | |
8802 | ignoring them. */ | |
fa9c3fa0 TT |
8803 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8804 | dwarf_tag_name (parent->tag), | |
8805 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8806 | parent->scope = grandparent_scope; |
c906108c SS |
8807 | } |
8808 | ||
72bf9492 DJ |
8809 | parent->scope_set = 1; |
8810 | return parent->scope; | |
8811 | } | |
8812 | ||
8813 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8814 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8815 | |
72bf9492 DJ |
8816 | static char * |
8817 | partial_die_full_name (struct partial_die_info *pdi, | |
8818 | struct dwarf2_cu *cu) | |
8819 | { | |
15d034d0 | 8820 | const char *parent_scope; |
72bf9492 | 8821 | |
98bfdba5 PA |
8822 | /* If this is a template instantiation, we can not work out the |
8823 | template arguments from partial DIEs. So, unfortunately, we have | |
8824 | to go through the full DIEs. At least any work we do building | |
8825 | types here will be reused if full symbols are loaded later. */ | |
8826 | if (pdi->has_template_arguments) | |
8827 | { | |
52356b79 | 8828 | pdi->fixup (cu); |
98bfdba5 PA |
8829 | |
8830 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8831 | { | |
8832 | struct die_info *die; | |
8833 | struct attribute attr; | |
8834 | struct dwarf2_cu *ref_cu = cu; | |
8835 | ||
b64f50a1 | 8836 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8837 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8838 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8839 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8840 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8841 | ||
8842 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
8843 | } | |
8844 | } | |
8845 | ||
72bf9492 DJ |
8846 | parent_scope = partial_die_parent_scope (pdi, cu); |
8847 | if (parent_scope == NULL) | |
8848 | return NULL; | |
8849 | else | |
f55ee35c | 8850 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
8851 | } |
8852 | ||
8853 | static void | |
72bf9492 | 8854 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8855 | { |
518817b3 SM |
8856 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8857 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8858 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8859 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8860 | CORE_ADDR addr = 0; |
15d034d0 | 8861 | const char *actual_name = NULL; |
e142c38c | 8862 | CORE_ADDR baseaddr; |
15d034d0 | 8863 | char *built_actual_name; |
e142c38c DJ |
8864 | |
8865 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 8866 | |
15d034d0 TT |
8867 | built_actual_name = partial_die_full_name (pdi, cu); |
8868 | if (built_actual_name != NULL) | |
8869 | actual_name = built_actual_name; | |
63d06c5c | 8870 | |
72bf9492 DJ |
8871 | if (actual_name == NULL) |
8872 | actual_name = pdi->name; | |
8873 | ||
c906108c SS |
8874 | switch (pdi->tag) |
8875 | { | |
b1dc1806 | 8876 | case DW_TAG_inlined_subroutine: |
c906108c | 8877 | case DW_TAG_subprogram: |
79748972 TT |
8878 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8879 | - baseaddr); | |
2cfa0c8d | 8880 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 8881 | { |
2cfa0c8d JB |
8882 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
8883 | of the global scope. But in Ada, we want to be able to access | |
8884 | nested procedures globally. So all Ada subprograms are stored | |
8885 | in the global scope. */ | |
f47fb265 | 8886 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8887 | built_actual_name != NULL, |
f47fb265 | 8888 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8889 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8890 | psymbol_placement::GLOBAL, |
79748972 TT |
8891 | addr, |
8892 | cu->language, objfile); | |
c906108c SS |
8893 | } |
8894 | else | |
8895 | { | |
f47fb265 | 8896 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8897 | built_actual_name != NULL, |
f47fb265 | 8898 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8899 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8900 | psymbol_placement::STATIC, |
1762568f | 8901 | addr, cu->language, objfile); |
c906108c | 8902 | } |
0c1b455e TT |
8903 | |
8904 | if (pdi->main_subprogram && actual_name != NULL) | |
8905 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8906 | break; |
72929c62 | 8907 | case DW_TAG_constant: |
75aedd27 TT |
8908 | add_psymbol_to_list (actual_name, strlen (actual_name), |
8909 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, | |
8910 | -1, (pdi->is_external | |
8911 | ? psymbol_placement::GLOBAL | |
8912 | : psymbol_placement::STATIC), | |
8913 | 0, cu->language, objfile); | |
72929c62 | 8914 | break; |
c906108c | 8915 | case DW_TAG_variable: |
95554aad TT |
8916 | if (pdi->d.locdesc) |
8917 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8918 | |
95554aad | 8919 | if (pdi->d.locdesc |
caac4577 JG |
8920 | && addr == 0 |
8921 | && !dwarf2_per_objfile->has_section_at_zero) | |
8922 | { | |
8923 | /* A global or static variable may also have been stripped | |
8924 | out by the linker if unused, in which case its address | |
8925 | will be nullified; do not add such variables into partial | |
8926 | symbol table then. */ | |
8927 | } | |
8928 | else if (pdi->is_external) | |
c906108c SS |
8929 | { |
8930 | /* Global Variable. | |
8931 | Don't enter into the minimal symbol tables as there is | |
8932 | a minimal symbol table entry from the ELF symbols already. | |
8933 | Enter into partial symbol table if it has a location | |
8934 | descriptor or a type. | |
8935 | If the location descriptor is missing, new_symbol will create | |
8936 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8937 | be determined from the minimal symbol table whenever the variable | |
8938 | is referenced. | |
8939 | The address for the partial symbol table entry is not | |
8940 | used by GDB, but it comes in handy for debugging partial symbol | |
8941 | table building. */ | |
8942 | ||
95554aad | 8943 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 8944 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8945 | built_actual_name != NULL, |
f47fb265 | 8946 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8947 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8948 | psymbol_placement::GLOBAL, |
79748972 | 8949 | addr, cu->language, objfile); |
c906108c SS |
8950 | } |
8951 | else | |
8952 | { | |
ff908ebf AW |
8953 | int has_loc = pdi->d.locdesc != NULL; |
8954 | ||
8955 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8956 | without location descriptors or constant values). */ | |
8957 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 8958 | { |
15d034d0 | 8959 | xfree (built_actual_name); |
decbce07 MS |
8960 | return; |
8961 | } | |
ff908ebf | 8962 | |
f47fb265 | 8963 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8964 | built_actual_name != NULL, |
f47fb265 | 8965 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8966 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8967 | psymbol_placement::STATIC, |
79748972 | 8968 | has_loc ? addr : 0, |
f47fb265 | 8969 | cu->language, objfile); |
c906108c SS |
8970 | } |
8971 | break; | |
8972 | case DW_TAG_typedef: | |
8973 | case DW_TAG_base_type: | |
a02abb62 | 8974 | case DW_TAG_subrange_type: |
38d518c9 | 8975 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 8976 | built_actual_name != NULL, |
79748972 | 8977 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8978 | psymbol_placement::STATIC, |
1762568f | 8979 | 0, cu->language, objfile); |
c906108c | 8980 | break; |
74921315 | 8981 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
8982 | case DW_TAG_namespace: |
8983 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 8984 | built_actual_name != NULL, |
79748972 | 8985 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8986 | psymbol_placement::GLOBAL, |
1762568f | 8987 | 0, cu->language, objfile); |
72bf9492 | 8988 | break; |
530e8392 | 8989 | case DW_TAG_module: |
a5fd13a9 BH |
8990 | /* With Fortran 77 there might be a "BLOCK DATA" module |
8991 | available without any name. If so, we skip the module as it | |
8992 | doesn't bring any value. */ | |
8993 | if (actual_name != nullptr) | |
8994 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
8995 | built_actual_name != NULL, | |
8996 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
8997 | psymbol_placement::GLOBAL, | |
8998 | 0, cu->language, objfile); | |
530e8392 | 8999 | break; |
c906108c | 9000 | case DW_TAG_class_type: |
680b30c7 | 9001 | case DW_TAG_interface_type: |
c906108c SS |
9002 | case DW_TAG_structure_type: |
9003 | case DW_TAG_union_type: | |
9004 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
9005 | /* Skip external references. The DWARF standard says in the section |
9006 | about "Structure, Union, and Class Type Entries": "An incomplete | |
9007 | structure, union or class type is represented by a structure, | |
9008 | union or class entry that does not have a byte size attribute | |
9009 | and that has a DW_AT_declaration attribute." */ | |
9010 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 9011 | { |
15d034d0 | 9012 | xfree (built_actual_name); |
decbce07 MS |
9013 | return; |
9014 | } | |
fa4028e9 | 9015 | |
63d06c5c DC |
9016 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
9017 | static vs. global. */ | |
38d518c9 | 9018 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9019 | built_actual_name != NULL, |
79748972 | 9020 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 9021 | cu->language == language_cplus |
75aedd27 TT |
9022 | ? psymbol_placement::GLOBAL |
9023 | : psymbol_placement::STATIC, | |
1762568f | 9024 | 0, cu->language, objfile); |
c906108c | 9025 | |
c906108c SS |
9026 | break; |
9027 | case DW_TAG_enumerator: | |
38d518c9 | 9028 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 9029 | built_actual_name != NULL, |
79748972 | 9030 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 9031 | cu->language == language_cplus |
75aedd27 TT |
9032 | ? psymbol_placement::GLOBAL |
9033 | : psymbol_placement::STATIC, | |
1762568f | 9034 | 0, cu->language, objfile); |
c906108c SS |
9035 | break; |
9036 | default: | |
9037 | break; | |
9038 | } | |
5c4e30ca | 9039 | |
15d034d0 | 9040 | xfree (built_actual_name); |
c906108c SS |
9041 | } |
9042 | ||
5c4e30ca DC |
9043 | /* Read a partial die corresponding to a namespace; also, add a symbol |
9044 | corresponding to that namespace to the symbol table. NAMESPACE is | |
9045 | the name of the enclosing namespace. */ | |
91c24f0a | 9046 | |
72bf9492 DJ |
9047 | static void |
9048 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 9049 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 9050 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 9051 | { |
72bf9492 | 9052 | /* Add a symbol for the namespace. */ |
e7c27a73 | 9053 | |
72bf9492 | 9054 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
9055 | |
9056 | /* Now scan partial symbols in that namespace. */ | |
9057 | ||
91c24f0a | 9058 | if (pdi->has_children) |
cdc07690 | 9059 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
9060 | } |
9061 | ||
5d7cb8df JK |
9062 | /* Read a partial die corresponding to a Fortran module. */ |
9063 | ||
9064 | static void | |
9065 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 9066 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 9067 | { |
530e8392 KB |
9068 | /* Add a symbol for the namespace. */ |
9069 | ||
9070 | add_partial_symbol (pdi, cu); | |
9071 | ||
f55ee35c | 9072 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
9073 | |
9074 | if (pdi->has_children) | |
cdc07690 | 9075 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
9076 | } |
9077 | ||
b1dc1806 XR |
9078 | /* Read a partial die corresponding to a subprogram or an inlined |
9079 | subprogram and create a partial symbol for that subprogram. | |
9080 | When the CU language allows it, this routine also defines a partial | |
9081 | symbol for each nested subprogram that this subprogram contains. | |
9082 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
9083 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 9084 | |
cdc07690 YQ |
9085 | PDI may also be a lexical block, in which case we simply search |
9086 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
9087 | Again, this is only performed when the CU language allows this |
9088 | type of definitions. */ | |
9089 | ||
9090 | static void | |
9091 | add_partial_subprogram (struct partial_die_info *pdi, | |
9092 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 9093 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 9094 | { |
b1dc1806 | 9095 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
9096 | { |
9097 | if (pdi->has_pc_info) | |
9098 | { | |
9099 | if (pdi->lowpc < *lowpc) | |
9100 | *lowpc = pdi->lowpc; | |
9101 | if (pdi->highpc > *highpc) | |
9102 | *highpc = pdi->highpc; | |
cdc07690 | 9103 | if (set_addrmap) |
5734ee8b | 9104 | { |
518817b3 | 9105 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
9106 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9107 | CORE_ADDR baseaddr; | |
b926417a TT |
9108 | CORE_ADDR this_highpc; |
9109 | CORE_ADDR this_lowpc; | |
5734ee8b DJ |
9110 | |
9111 | baseaddr = ANOFFSET (objfile->section_offsets, | |
9112 | SECT_OFF_TEXT (objfile)); | |
b926417a TT |
9113 | this_lowpc |
9114 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9115 | pdi->lowpc + baseaddr) | |
9116 | - baseaddr); | |
9117 | this_highpc | |
9118 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9119 | pdi->highpc + baseaddr) | |
9120 | - baseaddr); | |
d320c2b5 | 9121 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 9122 | this_lowpc, this_highpc - 1, |
9291a0cd | 9123 | cu->per_cu->v.psymtab); |
5734ee8b | 9124 | } |
481860b3 GB |
9125 | } |
9126 | ||
9127 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
9128 | { | |
bc30ff58 | 9129 | if (!pdi->is_declaration) |
e8d05480 JB |
9130 | /* Ignore subprogram DIEs that do not have a name, they are |
9131 | illegal. Do not emit a complaint at this point, we will | |
9132 | do so when we convert this psymtab into a symtab. */ | |
9133 | if (pdi->name) | |
9134 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
9135 | } |
9136 | } | |
6e70227d | 9137 | |
bc30ff58 JB |
9138 | if (! pdi->has_children) |
9139 | return; | |
9140 | ||
9141 | if (cu->language == language_ada) | |
9142 | { | |
9143 | pdi = pdi->die_child; | |
9144 | while (pdi != NULL) | |
9145 | { | |
52356b79 | 9146 | pdi->fixup (cu); |
bc30ff58 | 9147 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 9148 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 9149 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 9150 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
9151 | pdi = pdi->die_sibling; |
9152 | } | |
9153 | } | |
9154 | } | |
9155 | ||
91c24f0a DC |
9156 | /* Read a partial die corresponding to an enumeration type. */ |
9157 | ||
72bf9492 DJ |
9158 | static void |
9159 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
9160 | struct dwarf2_cu *cu) | |
91c24f0a | 9161 | { |
72bf9492 | 9162 | struct partial_die_info *pdi; |
91c24f0a DC |
9163 | |
9164 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
9165 | add_partial_symbol (enum_pdi, cu); |
9166 | ||
9167 | pdi = enum_pdi->die_child; | |
9168 | while (pdi) | |
91c24f0a | 9169 | { |
72bf9492 | 9170 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 9171 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 9172 | else |
72bf9492 DJ |
9173 | add_partial_symbol (pdi, cu); |
9174 | pdi = pdi->die_sibling; | |
91c24f0a | 9175 | } |
91c24f0a DC |
9176 | } |
9177 | ||
6caca83c CC |
9178 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
9179 | ||
9180 | static unsigned int | |
d521ce57 | 9181 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
9182 | { |
9183 | unsigned int bytes_read; | |
9184 | ||
9185 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9186 | } | |
9187 | ||
685af9cd TT |
9188 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
9189 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
9190 | ||
4bb7a0a7 DJ |
9191 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
9192 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
9193 | the initial number. */ | |
9194 | ||
9195 | static struct abbrev_info * | |
685af9cd TT |
9196 | peek_die_abbrev (const die_reader_specs &reader, |
9197 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 9198 | { |
685af9cd | 9199 | dwarf2_cu *cu = reader.cu; |
518817b3 | 9200 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
9201 | unsigned int abbrev_number |
9202 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
9203 | |
9204 | if (abbrev_number == 0) | |
9205 | return NULL; | |
9206 | ||
685af9cd | 9207 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
9208 | if (!abbrev) |
9209 | { | |
422b9917 | 9210 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 9211 | " at offset %s [in module %s]"), |
422b9917 | 9212 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 9213 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
9214 | } |
9215 | ||
9216 | return abbrev; | |
9217 | } | |
9218 | ||
93311388 DE |
9219 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9220 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
9221 | DIE. Any children of the skipped DIEs will also be skipped. */ |
9222 | ||
d521ce57 TT |
9223 | static const gdb_byte * |
9224 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 9225 | { |
4bb7a0a7 DJ |
9226 | while (1) |
9227 | { | |
685af9cd TT |
9228 | unsigned int bytes_read; |
9229 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
9230 | ||
4bb7a0a7 DJ |
9231 | if (abbrev == NULL) |
9232 | return info_ptr + bytes_read; | |
9233 | else | |
dee91e82 | 9234 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
9235 | } |
9236 | } | |
9237 | ||
93311388 DE |
9238 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9239 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
9240 | abbrev corresponding to that skipped uleb128 should be passed in |
9241 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
9242 | children. */ | |
9243 | ||
d521ce57 TT |
9244 | static const gdb_byte * |
9245 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 9246 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
9247 | { |
9248 | unsigned int bytes_read; | |
9249 | struct attribute attr; | |
dee91e82 DE |
9250 | bfd *abfd = reader->abfd; |
9251 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 9252 | const gdb_byte *buffer = reader->buffer; |
f664829e | 9253 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
9254 | unsigned int form, i; |
9255 | ||
9256 | for (i = 0; i < abbrev->num_attrs; i++) | |
9257 | { | |
9258 | /* The only abbrev we care about is DW_AT_sibling. */ | |
9259 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
9260 | { | |
dee91e82 | 9261 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 9262 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 9263 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 9264 | else |
b9502d3f | 9265 | { |
9c541725 PA |
9266 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
9267 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
9268 | |
9269 | if (sibling_ptr < info_ptr) | |
b98664d3 | 9270 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
9271 | else if (sibling_ptr > reader->buffer_end) |
9272 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
9273 | else |
9274 | return sibling_ptr; | |
9275 | } | |
4bb7a0a7 DJ |
9276 | } |
9277 | ||
9278 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
9279 | form = abbrev->attrs[i].form; | |
9280 | skip_attribute: | |
9281 | switch (form) | |
9282 | { | |
4bb7a0a7 | 9283 | case DW_FORM_ref_addr: |
ae411497 TT |
9284 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
9285 | and later it is offset sized. */ | |
9286 | if (cu->header.version == 2) | |
9287 | info_ptr += cu->header.addr_size; | |
9288 | else | |
9289 | info_ptr += cu->header.offset_size; | |
9290 | break; | |
36586728 TT |
9291 | case DW_FORM_GNU_ref_alt: |
9292 | info_ptr += cu->header.offset_size; | |
9293 | break; | |
ae411497 | 9294 | case DW_FORM_addr: |
4bb7a0a7 DJ |
9295 | info_ptr += cu->header.addr_size; |
9296 | break; | |
9297 | case DW_FORM_data1: | |
9298 | case DW_FORM_ref1: | |
9299 | case DW_FORM_flag: | |
9300 | info_ptr += 1; | |
9301 | break; | |
2dc7f7b3 | 9302 | case DW_FORM_flag_present: |
43988095 | 9303 | case DW_FORM_implicit_const: |
2dc7f7b3 | 9304 | break; |
4bb7a0a7 DJ |
9305 | case DW_FORM_data2: |
9306 | case DW_FORM_ref2: | |
9307 | info_ptr += 2; | |
9308 | break; | |
9309 | case DW_FORM_data4: | |
9310 | case DW_FORM_ref4: | |
9311 | info_ptr += 4; | |
9312 | break; | |
9313 | case DW_FORM_data8: | |
9314 | case DW_FORM_ref8: | |
55f1336d | 9315 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
9316 | info_ptr += 8; |
9317 | break; | |
0224619f JK |
9318 | case DW_FORM_data16: |
9319 | info_ptr += 16; | |
9320 | break; | |
4bb7a0a7 | 9321 | case DW_FORM_string: |
9b1c24c8 | 9322 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
9323 | info_ptr += bytes_read; |
9324 | break; | |
2dc7f7b3 | 9325 | case DW_FORM_sec_offset: |
4bb7a0a7 | 9326 | case DW_FORM_strp: |
36586728 | 9327 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
9328 | info_ptr += cu->header.offset_size; |
9329 | break; | |
2dc7f7b3 | 9330 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
9331 | case DW_FORM_block: |
9332 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9333 | info_ptr += bytes_read; | |
9334 | break; | |
9335 | case DW_FORM_block1: | |
9336 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
9337 | break; | |
9338 | case DW_FORM_block2: | |
9339 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
9340 | break; | |
9341 | case DW_FORM_block4: | |
9342 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
9343 | break; | |
336d760d | 9344 | case DW_FORM_addrx: |
cf532bd1 | 9345 | case DW_FORM_strx: |
4bb7a0a7 DJ |
9346 | case DW_FORM_sdata: |
9347 | case DW_FORM_udata: | |
9348 | case DW_FORM_ref_udata: | |
3019eac3 DE |
9349 | case DW_FORM_GNU_addr_index: |
9350 | case DW_FORM_GNU_str_index: | |
d521ce57 | 9351 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
9352 | break; |
9353 | case DW_FORM_indirect: | |
9354 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9355 | info_ptr += bytes_read; | |
9356 | /* We need to continue parsing from here, so just go back to | |
9357 | the top. */ | |
9358 | goto skip_attribute; | |
9359 | ||
9360 | default: | |
3e43a32a MS |
9361 | error (_("Dwarf Error: Cannot handle %s " |
9362 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
9363 | dwarf_form_name (form), |
9364 | bfd_get_filename (abfd)); | |
9365 | } | |
9366 | } | |
9367 | ||
9368 | if (abbrev->has_children) | |
dee91e82 | 9369 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
9370 | else |
9371 | return info_ptr; | |
9372 | } | |
9373 | ||
93311388 | 9374 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 9375 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 9376 | |
d521ce57 | 9377 | static const gdb_byte * |
dee91e82 DE |
9378 | locate_pdi_sibling (const struct die_reader_specs *reader, |
9379 | struct partial_die_info *orig_pdi, | |
d521ce57 | 9380 | const gdb_byte *info_ptr) |
91c24f0a DC |
9381 | { |
9382 | /* Do we know the sibling already? */ | |
72bf9492 | 9383 | |
91c24f0a DC |
9384 | if (orig_pdi->sibling) |
9385 | return orig_pdi->sibling; | |
9386 | ||
9387 | /* Are there any children to deal with? */ | |
9388 | ||
9389 | if (!orig_pdi->has_children) | |
9390 | return info_ptr; | |
9391 | ||
4bb7a0a7 | 9392 | /* Skip the children the long way. */ |
91c24f0a | 9393 | |
dee91e82 | 9394 | return skip_children (reader, info_ptr); |
91c24f0a DC |
9395 | } |
9396 | ||
257e7a09 | 9397 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 9398 | not NULL. */ |
c906108c SS |
9399 | |
9400 | static void | |
257e7a09 YQ |
9401 | dwarf2_read_symtab (struct partial_symtab *self, |
9402 | struct objfile *objfile) | |
c906108c | 9403 | { |
ed2dc618 SM |
9404 | struct dwarf2_per_objfile *dwarf2_per_objfile |
9405 | = get_dwarf2_per_objfile (objfile); | |
9406 | ||
257e7a09 | 9407 | if (self->readin) |
c906108c | 9408 | { |
442e4d9c | 9409 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 9410 | self->filename); |
442e4d9c YQ |
9411 | } |
9412 | else | |
9413 | { | |
9414 | if (info_verbose) | |
c906108c | 9415 | { |
442e4d9c | 9416 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 9417 | self->filename); |
442e4d9c | 9418 | gdb_flush (gdb_stdout); |
c906108c | 9419 | } |
c906108c | 9420 | |
442e4d9c YQ |
9421 | /* If this psymtab is constructed from a debug-only objfile, the |
9422 | has_section_at_zero flag will not necessarily be correct. We | |
9423 | can get the correct value for this flag by looking at the data | |
9424 | associated with the (presumably stripped) associated objfile. */ | |
9425 | if (objfile->separate_debug_objfile_backlink) | |
9426 | { | |
9427 | struct dwarf2_per_objfile *dpo_backlink | |
ed2dc618 | 9428 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
9a619af0 | 9429 | |
442e4d9c YQ |
9430 | dwarf2_per_objfile->has_section_at_zero |
9431 | = dpo_backlink->has_section_at_zero; | |
9432 | } | |
b2ab525c | 9433 | |
442e4d9c | 9434 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 9435 | |
257e7a09 | 9436 | psymtab_to_symtab_1 (self); |
c906108c | 9437 | |
442e4d9c YQ |
9438 | /* Finish up the debug error message. */ |
9439 | if (info_verbose) | |
9440 | printf_filtered (_("done.\n")); | |
c906108c | 9441 | } |
95554aad | 9442 | |
ed2dc618 | 9443 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 9444 | } |
9cdd5dbd DE |
9445 | \f |
9446 | /* Reading in full CUs. */ | |
c906108c | 9447 | |
10b3939b DJ |
9448 | /* Add PER_CU to the queue. */ |
9449 | ||
9450 | static void | |
95554aad TT |
9451 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9452 | enum language pretend_language) | |
10b3939b DJ |
9453 | { |
9454 | struct dwarf2_queue_item *item; | |
9455 | ||
9456 | per_cu->queued = 1; | |
8d749320 | 9457 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 9458 | item->per_cu = per_cu; |
95554aad | 9459 | item->pretend_language = pretend_language; |
10b3939b DJ |
9460 | item->next = NULL; |
9461 | ||
9462 | if (dwarf2_queue == NULL) | |
9463 | dwarf2_queue = item; | |
9464 | else | |
9465 | dwarf2_queue_tail->next = item; | |
9466 | ||
9467 | dwarf2_queue_tail = item; | |
9468 | } | |
9469 | ||
89e63ee4 DE |
9470 | /* If PER_CU is not yet queued, add it to the queue. |
9471 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
9472 | dependency. | |
0907af0c | 9473 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
9474 | meaning either PER_CU is already queued or it is already loaded. |
9475 | ||
9476 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
9477 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
9478 | |
9479 | static int | |
89e63ee4 | 9480 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
9481 | struct dwarf2_per_cu_data *per_cu, |
9482 | enum language pretend_language) | |
9483 | { | |
9484 | /* We may arrive here during partial symbol reading, if we need full | |
9485 | DIEs to process an unusual case (e.g. template arguments). Do | |
9486 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 9487 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
9488 | { |
9489 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
9490 | return 1; | |
9491 | return 0; | |
9492 | } | |
9493 | ||
9494 | /* Mark the dependence relation so that we don't flush PER_CU | |
9495 | too early. */ | |
89e63ee4 DE |
9496 | if (dependent_cu != NULL) |
9497 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
9498 | |
9499 | /* If it's already on the queue, we have nothing to do. */ | |
9500 | if (per_cu->queued) | |
9501 | return 0; | |
9502 | ||
9503 | /* If the compilation unit is already loaded, just mark it as | |
9504 | used. */ | |
9505 | if (per_cu->cu != NULL) | |
9506 | { | |
9507 | per_cu->cu->last_used = 0; | |
9508 | return 0; | |
9509 | } | |
9510 | ||
9511 | /* Add it to the queue. */ | |
9512 | queue_comp_unit (per_cu, pretend_language); | |
9513 | ||
9514 | return 1; | |
9515 | } | |
9516 | ||
10b3939b DJ |
9517 | /* Process the queue. */ |
9518 | ||
9519 | static void | |
ed2dc618 | 9520 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b DJ |
9521 | { |
9522 | struct dwarf2_queue_item *item, *next_item; | |
9523 | ||
b4f54984 | 9524 | if (dwarf_read_debug) |
45cfd468 DE |
9525 | { |
9526 | fprintf_unfiltered (gdb_stdlog, | |
9527 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 9528 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
9529 | } |
9530 | ||
03dd20cc DJ |
9531 | /* The queue starts out with one item, but following a DIE reference |
9532 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
9533 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
9534 | { | |
cc12ce38 DE |
9535 | if ((dwarf2_per_objfile->using_index |
9536 | ? !item->per_cu->v.quick->compunit_symtab | |
9537 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
9538 | /* Skip dummy CUs. */ | |
9539 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
9540 | { |
9541 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 9542 | unsigned int debug_print_threshold; |
247f5c4f | 9543 | char buf[100]; |
f4dc4d17 | 9544 | |
247f5c4f | 9545 | if (per_cu->is_debug_types) |
f4dc4d17 | 9546 | { |
247f5c4f DE |
9547 | struct signatured_type *sig_type = |
9548 | (struct signatured_type *) per_cu; | |
9549 | ||
9d8780f0 | 9550 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 9551 | hex_string (sig_type->signature), |
9d8780f0 | 9552 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
9553 | /* There can be 100s of TUs. |
9554 | Only print them in verbose mode. */ | |
9555 | debug_print_threshold = 2; | |
f4dc4d17 | 9556 | } |
247f5c4f | 9557 | else |
73be47f5 | 9558 | { |
9d8780f0 SM |
9559 | sprintf (buf, "CU at offset %s", |
9560 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
9561 | debug_print_threshold = 1; |
9562 | } | |
247f5c4f | 9563 | |
b4f54984 | 9564 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9565 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
9566 | |
9567 | if (per_cu->is_debug_types) | |
9568 | process_full_type_unit (per_cu, item->pretend_language); | |
9569 | else | |
9570 | process_full_comp_unit (per_cu, item->pretend_language); | |
9571 | ||
b4f54984 | 9572 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9573 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 9574 | } |
10b3939b DJ |
9575 | |
9576 | item->per_cu->queued = 0; | |
9577 | next_item = item->next; | |
9578 | xfree (item); | |
9579 | } | |
9580 | ||
9581 | dwarf2_queue_tail = NULL; | |
45cfd468 | 9582 | |
b4f54984 | 9583 | if (dwarf_read_debug) |
45cfd468 DE |
9584 | { |
9585 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 9586 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 9587 | } |
10b3939b DJ |
9588 | } |
9589 | ||
10b3939b DJ |
9590 | /* Read in full symbols for PST, and anything it depends on. */ |
9591 | ||
c906108c | 9592 | static void |
fba45db2 | 9593 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 9594 | { |
10b3939b | 9595 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
9596 | int i; |
9597 | ||
95554aad TT |
9598 | if (pst->readin) |
9599 | return; | |
9600 | ||
aaa75496 | 9601 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
9602 | if (!pst->dependencies[i]->readin |
9603 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
9604 | { |
9605 | /* Inform about additional files that need to be read in. */ | |
9606 | if (info_verbose) | |
9607 | { | |
a3f17187 | 9608 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
9609 | fputs_filtered (" ", gdb_stdout); |
9610 | wrap_here (""); | |
9611 | fputs_filtered ("and ", gdb_stdout); | |
9612 | wrap_here (""); | |
9613 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 9614 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
9615 | gdb_flush (gdb_stdout); |
9616 | } | |
9617 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
9618 | } | |
9619 | ||
9a3c8263 | 9620 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
9621 | |
9622 | if (per_cu == NULL) | |
aaa75496 JB |
9623 | { |
9624 | /* It's an include file, no symbols to read for it. | |
9625 | Everything is in the parent symtab. */ | |
9626 | pst->readin = 1; | |
9627 | return; | |
9628 | } | |
c906108c | 9629 | |
58f0c718 | 9630 | dw2_do_instantiate_symtab (per_cu, false); |
10b3939b DJ |
9631 | } |
9632 | ||
dee91e82 DE |
9633 | /* Trivial hash function for die_info: the hash value of a DIE |
9634 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 9635 | |
dee91e82 DE |
9636 | static hashval_t |
9637 | die_hash (const void *item) | |
10b3939b | 9638 | { |
9a3c8263 | 9639 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 9640 | |
9c541725 | 9641 | return to_underlying (die->sect_off); |
dee91e82 | 9642 | } |
63d06c5c | 9643 | |
dee91e82 DE |
9644 | /* Trivial comparison function for die_info structures: two DIEs |
9645 | are equal if they have the same offset. */ | |
98bfdba5 | 9646 | |
dee91e82 DE |
9647 | static int |
9648 | die_eq (const void *item_lhs, const void *item_rhs) | |
9649 | { | |
9a3c8263 SM |
9650 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
9651 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 9652 | |
9c541725 | 9653 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 9654 | } |
c906108c | 9655 | |
dee91e82 DE |
9656 | /* die_reader_func for load_full_comp_unit. |
9657 | This is identical to read_signatured_type_reader, | |
9658 | but is kept separate for now. */ | |
c906108c | 9659 | |
dee91e82 DE |
9660 | static void |
9661 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 9662 | const gdb_byte *info_ptr, |
dee91e82 DE |
9663 | struct die_info *comp_unit_die, |
9664 | int has_children, | |
9665 | void *data) | |
9666 | { | |
9667 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 9668 | enum language *language_ptr = (enum language *) data; |
6caca83c | 9669 | |
dee91e82 DE |
9670 | gdb_assert (cu->die_hash == NULL); |
9671 | cu->die_hash = | |
9672 | htab_create_alloc_ex (cu->header.length / 12, | |
9673 | die_hash, | |
9674 | die_eq, | |
9675 | NULL, | |
9676 | &cu->comp_unit_obstack, | |
9677 | hashtab_obstack_allocate, | |
9678 | dummy_obstack_deallocate); | |
e142c38c | 9679 | |
dee91e82 DE |
9680 | if (has_children) |
9681 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
9682 | &info_ptr, comp_unit_die); | |
9683 | cu->dies = comp_unit_die; | |
9684 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
9685 | |
9686 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 9687 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 9688 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
9689 | or we won't be able to build types correctly. |
9690 | Similarly, if we do not read the producer, we can not apply | |
9691 | producer-specific interpretation. */ | |
95554aad | 9692 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 9693 | } |
10b3939b | 9694 | |
dee91e82 | 9695 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 9696 | |
dee91e82 | 9697 | static void |
95554aad | 9698 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
58f0c718 | 9699 | bool skip_partial, |
95554aad | 9700 | enum language pretend_language) |
dee91e82 | 9701 | { |
3019eac3 | 9702 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 9703 | |
58f0c718 | 9704 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, skip_partial, |
f4dc4d17 | 9705 | load_full_comp_unit_reader, &pretend_language); |
10b3939b DJ |
9706 | } |
9707 | ||
3da10d80 KS |
9708 | /* Add a DIE to the delayed physname list. */ |
9709 | ||
9710 | static void | |
9711 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
9712 | const char *name, struct die_info *die, | |
9713 | struct dwarf2_cu *cu) | |
9714 | { | |
9715 | struct delayed_method_info mi; | |
9716 | mi.type = type; | |
9717 | mi.fnfield_index = fnfield_index; | |
9718 | mi.index = index; | |
9719 | mi.name = name; | |
9720 | mi.die = die; | |
c89b44cd | 9721 | cu->method_list.push_back (mi); |
3da10d80 KS |
9722 | } |
9723 | ||
3693fdb3 PA |
9724 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
9725 | "const" / "volatile". If so, decrements LEN by the length of the | |
9726 | modifier and return true. Otherwise return false. */ | |
9727 | ||
9728 | template<size_t N> | |
9729 | static bool | |
9730 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
9731 | { | |
9732 | size_t mod_len = sizeof (mod) - 1; | |
9733 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
9734 | { | |
9735 | len -= mod_len; | |
9736 | return true; | |
9737 | } | |
9738 | return false; | |
9739 | } | |
9740 | ||
3da10d80 KS |
9741 | /* Compute the physnames of any methods on the CU's method list. |
9742 | ||
9743 | The computation of method physnames is delayed in order to avoid the | |
9744 | (bad) condition that one of the method's formal parameters is of an as yet | |
9745 | incomplete type. */ | |
9746 | ||
9747 | static void | |
9748 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9749 | { | |
3693fdb3 | 9750 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9751 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9752 | return; |
9753 | gdb_assert (cu->language == language_cplus); | |
9754 | ||
52941706 | 9755 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9756 | { |
1d06ead6 | 9757 | const char *physname; |
3da10d80 | 9758 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9759 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9760 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9761 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9762 | = physname ? physname : ""; |
3693fdb3 PA |
9763 | |
9764 | /* Since there's no tag to indicate whether a method is a | |
9765 | const/volatile overload, extract that information out of the | |
9766 | demangled name. */ | |
9767 | if (physname != NULL) | |
9768 | { | |
9769 | size_t len = strlen (physname); | |
9770 | ||
9771 | while (1) | |
9772 | { | |
9773 | if (physname[len] == ')') /* shortcut */ | |
9774 | break; | |
9775 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9776 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9777 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9778 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9779 | else |
9780 | break; | |
9781 | } | |
9782 | } | |
3da10d80 | 9783 | } |
c89b44cd TT |
9784 | |
9785 | /* The list is no longer needed. */ | |
9786 | cu->method_list.clear (); | |
3da10d80 KS |
9787 | } |
9788 | ||
a766d390 DE |
9789 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9790 | and it's not clear if/how imported objects will appear. | |
9791 | To keep Go support simple until that's worked out, | |
9792 | go back through what we've read and create something usable. | |
9793 | We could do this while processing each DIE, and feels kinda cleaner, | |
9794 | but that way is more invasive. | |
9795 | This is to, for example, allow the user to type "p var" or "b main" | |
9796 | without having to specify the package name, and allow lookups | |
9797 | of module.object to work in contexts that use the expression | |
9798 | parser. */ | |
9799 | ||
9800 | static void | |
9801 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9802 | { | |
9803 | char *package_name = NULL; | |
9804 | struct pending *list; | |
9805 | int i; | |
9806 | ||
c24bdb02 | 9807 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9808 | list != NULL; |
9809 | list = list->next) | |
a766d390 DE |
9810 | { |
9811 | for (i = 0; i < list->nsyms; ++i) | |
9812 | { | |
9813 | struct symbol *sym = list->symbol[i]; | |
9814 | ||
9815 | if (SYMBOL_LANGUAGE (sym) == language_go | |
9816 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
9817 | { | |
9818 | char *this_package_name = go_symbol_package_name (sym); | |
9819 | ||
9820 | if (this_package_name == NULL) | |
9821 | continue; | |
9822 | if (package_name == NULL) | |
9823 | package_name = this_package_name; | |
9824 | else | |
9825 | { | |
518817b3 SM |
9826 | struct objfile *objfile |
9827 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
a766d390 | 9828 | if (strcmp (package_name, this_package_name) != 0) |
b98664d3 | 9829 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9830 | (symbol_symtab (sym) != NULL |
9831 | ? symtab_to_filename_for_display | |
9832 | (symbol_symtab (sym)) | |
e3b94546 | 9833 | : objfile_name (objfile)), |
a766d390 DE |
9834 | this_package_name, package_name); |
9835 | xfree (this_package_name); | |
9836 | } | |
9837 | } | |
9838 | } | |
9839 | } | |
9840 | ||
9841 | if (package_name != NULL) | |
9842 | { | |
518817b3 | 9843 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
34a68019 | 9844 | const char *saved_package_name |
021887d8 | 9845 | = obstack_strdup (&objfile->per_bfd->storage_obstack, package_name); |
19f392bc UW |
9846 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9847 | saved_package_name); | |
a766d390 DE |
9848 | struct symbol *sym; |
9849 | ||
e623cf5d | 9850 | sym = allocate_symbol (objfile); |
f85f34ed | 9851 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
9852 | SYMBOL_SET_NAMES (sym, saved_package_name, |
9853 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
9854 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9855 | e.g., "main" finds the "main" module and not C's main(). */ | |
9856 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9857 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9858 | SYMBOL_TYPE (sym) = type; |
9859 | ||
c24bdb02 | 9860 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9861 | |
9862 | xfree (package_name); | |
9863 | } | |
9864 | } | |
9865 | ||
c9317f21 TT |
9866 | /* Allocate a fully-qualified name consisting of the two parts on the |
9867 | obstack. */ | |
9868 | ||
9869 | static const char * | |
9870 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9871 | { | |
9872 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9873 | } | |
9874 | ||
9875 | /* A helper that allocates a struct discriminant_info to attach to a | |
9876 | union type. */ | |
9877 | ||
9878 | static struct discriminant_info * | |
9879 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9880 | int default_index) | |
9881 | { | |
9882 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9883 | gdb_assert (discriminant_index == -1 |
9884 | || (discriminant_index >= 0 | |
9885 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9886 | gdb_assert (default_index == -1 |
c7b15a66 | 9887 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9888 | |
9889 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9890 | ||
9891 | struct discriminant_info *disc | |
9892 | = ((struct discriminant_info *) | |
9893 | TYPE_ZALLOC (type, | |
9894 | offsetof (struct discriminant_info, discriminants) | |
9895 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9896 | disc->default_index = default_index; | |
9897 | disc->discriminant_index = discriminant_index; | |
9898 | ||
9899 | struct dynamic_prop prop; | |
9900 | prop.kind = PROP_UNDEFINED; | |
9901 | prop.data.baton = disc; | |
9902 | ||
9903 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9904 | ||
9905 | return disc; | |
9906 | } | |
9907 | ||
9908 | /* Some versions of rustc emitted enums in an unusual way. | |
9909 | ||
9910 | Ordinary enums were emitted as unions. The first element of each | |
9911 | structure in the union was named "RUST$ENUM$DISR". This element | |
9912 | held the discriminant. | |
9913 | ||
9914 | These versions of Rust also implemented the "non-zero" | |
9915 | optimization. When the enum had two values, and one is empty and | |
9916 | the other holds a pointer that cannot be zero, the pointer is used | |
9917 | as the discriminant, with a zero value meaning the empty variant. | |
9918 | Here, the union's first member is of the form | |
9919 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9920 | where the fieldnos are the indices of the fields that should be | |
9921 | traversed in order to find the field (which may be several fields deep) | |
9922 | and the variantname is the name of the variant of the case when the | |
9923 | field is zero. | |
9924 | ||
9925 | This function recognizes whether TYPE is of one of these forms, | |
9926 | and, if so, smashes it to be a variant type. */ | |
9927 | ||
9928 | static void | |
9929 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9930 | { | |
9931 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9932 | ||
9933 | /* We don't need to deal with empty enums. */ | |
9934 | if (TYPE_NFIELDS (type) == 0) | |
9935 | return; | |
9936 | ||
9937 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9938 | if (TYPE_NFIELDS (type) == 1 | |
9939 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9940 | { | |
9941 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9942 | ||
9943 | /* Decode the field name to find the offset of the | |
9944 | discriminant. */ | |
9945 | ULONGEST bit_offset = 0; | |
9946 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9947 | while (name[0] >= '0' && name[0] <= '9') | |
9948 | { | |
9949 | char *tail; | |
9950 | unsigned long index = strtoul (name, &tail, 10); | |
9951 | name = tail; | |
9952 | if (*name != '$' | |
9953 | || index >= TYPE_NFIELDS (field_type) | |
9954 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9955 | != FIELD_LOC_KIND_BITPOS)) | |
9956 | { | |
b98664d3 | 9957 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9958 | "[in module %s]"), |
9959 | TYPE_FIELD_NAME (type, 0), | |
9960 | objfile_name (objfile)); | |
9961 | return; | |
9962 | } | |
9963 | ++name; | |
9964 | ||
9965 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9966 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9967 | } | |
9968 | ||
9969 | /* Make a union to hold the variants. */ | |
9970 | struct type *union_type = alloc_type (objfile); | |
9971 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9972 | TYPE_NFIELDS (union_type) = 3; | |
9973 | TYPE_FIELDS (union_type) | |
9974 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
9975 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9976 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9977 | |
9978 | /* Put the discriminant must at index 0. */ | |
9979 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
9980 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9981 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9982 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
9983 | ||
9984 | /* The order of fields doesn't really matter, so put the real | |
9985 | field at index 1 and the data-less field at index 2. */ | |
9986 | struct discriminant_info *disc | |
9987 | = alloc_discriminant_info (union_type, 0, 1); | |
9988 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
9989 | TYPE_FIELD_NAME (union_type, 1) | |
9990 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
9991 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
9992 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9993 | TYPE_FIELD_NAME (union_type, 1)); | |
9994 | ||
9995 | const char *dataless_name | |
9996 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9997 | name); | |
9998 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9999 | dataless_name); | |
10000 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
10001 | /* NAME points into the original discriminant name, which | |
10002 | already has the correct lifetime. */ | |
10003 | TYPE_FIELD_NAME (union_type, 2) = name; | |
10004 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
10005 | disc->discriminants[2] = 0; | |
10006 | ||
10007 | /* Smash this type to be a structure type. We have to do this | |
10008 | because the type has already been recorded. */ | |
10009 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10010 | TYPE_NFIELDS (type) = 1; | |
10011 | TYPE_FIELDS (type) | |
10012 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
10013 | ||
10014 | /* Install the variant part. */ | |
10015 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10016 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10017 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10018 | } | |
10019 | else if (TYPE_NFIELDS (type) == 1) | |
10020 | { | |
10021 | /* We assume that a union with a single field is a univariant | |
10022 | enum. */ | |
10023 | /* Smash this type to be a structure type. We have to do this | |
10024 | because the type has already been recorded. */ | |
10025 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10026 | ||
10027 | /* Make a union to hold the variants. */ | |
10028 | struct type *union_type = alloc_type (objfile); | |
10029 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10030 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
10031 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10032 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10033 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
10034 | ||
10035 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
10036 | const char *variant_name | |
10037 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
10038 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
10039 | TYPE_NAME (field_type) | |
10040 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 10041 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
10042 | |
10043 | /* Install the union in the outer struct type. */ | |
10044 | TYPE_NFIELDS (type) = 1; | |
10045 | TYPE_FIELDS (type) | |
10046 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
10047 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10048 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10049 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10050 | ||
10051 | alloc_discriminant_info (union_type, -1, 0); | |
10052 | } | |
10053 | else | |
10054 | { | |
10055 | struct type *disr_type = nullptr; | |
10056 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
10057 | { | |
10058 | disr_type = TYPE_FIELD_TYPE (type, i); | |
10059 | ||
a037790e TT |
10060 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
10061 | { | |
10062 | /* All fields of a true enum will be structs. */ | |
10063 | return; | |
10064 | } | |
10065 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
10066 | { |
10067 | /* Could be data-less variant, so keep going. */ | |
a037790e | 10068 | disr_type = nullptr; |
c9317f21 TT |
10069 | } |
10070 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
10071 | "RUST$ENUM$DISR") != 0) | |
10072 | { | |
10073 | /* Not a Rust enum. */ | |
10074 | return; | |
10075 | } | |
10076 | else | |
10077 | { | |
10078 | /* Found one. */ | |
10079 | break; | |
10080 | } | |
10081 | } | |
10082 | ||
10083 | /* If we got here without a discriminant, then it's probably | |
10084 | just a union. */ | |
10085 | if (disr_type == nullptr) | |
10086 | return; | |
10087 | ||
10088 | /* Smash this type to be a structure type. We have to do this | |
10089 | because the type has already been recorded. */ | |
10090 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10091 | ||
10092 | /* Make a union to hold the variants. */ | |
10093 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
10094 | struct type *union_type = alloc_type (objfile); | |
10095 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10096 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
10097 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10098 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10099 | TYPE_FIELDS (union_type) |
10100 | = (struct field *) TYPE_ZALLOC (union_type, | |
10101 | (TYPE_NFIELDS (union_type) | |
10102 | * sizeof (struct field))); | |
10103 | ||
10104 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
10105 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
10106 | ||
10107 | /* Install the discriminant at index 0 in the union. */ | |
10108 | TYPE_FIELD (union_type, 0) = *disr_field; | |
10109 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10110 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10111 | ||
10112 | /* Install the union in the outer struct type. */ | |
10113 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10114 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10115 | TYPE_NFIELDS (type) = 1; | |
10116 | ||
10117 | /* Set the size and offset of the union type. */ | |
10118 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10119 | ||
10120 | /* We need a way to find the correct discriminant given a | |
10121 | variant name. For convenience we build a map here. */ | |
10122 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
10123 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
10124 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
10125 | { | |
10126 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
10127 | { | |
10128 | const char *name | |
10129 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
10130 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
10131 | } | |
10132 | } | |
10133 | ||
10134 | int n_fields = TYPE_NFIELDS (union_type); | |
10135 | struct discriminant_info *disc | |
10136 | = alloc_discriminant_info (union_type, 0, -1); | |
10137 | /* Skip the discriminant here. */ | |
10138 | for (int i = 1; i < n_fields; ++i) | |
10139 | { | |
10140 | /* Find the final word in the name of this variant's type. | |
10141 | That name can be used to look up the correct | |
10142 | discriminant. */ | |
10143 | const char *variant_name | |
10144 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
10145 | i))); | |
10146 | ||
10147 | auto iter = discriminant_map.find (variant_name); | |
10148 | if (iter != discriminant_map.end ()) | |
10149 | disc->discriminants[i] = iter->second; | |
10150 | ||
bedda9ac | 10151 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 10152 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
10153 | if (TYPE_NFIELDS (sub_type) > 0) |
10154 | { | |
10155 | --TYPE_NFIELDS (sub_type); | |
10156 | ++TYPE_FIELDS (sub_type); | |
10157 | } | |
c9317f21 TT |
10158 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
10159 | TYPE_NAME (sub_type) | |
10160 | = rust_fully_qualify (&objfile->objfile_obstack, | |
10161 | TYPE_NAME (type), variant_name); | |
10162 | } | |
10163 | } | |
10164 | } | |
10165 | ||
10166 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
10167 | ||
10168 | static void | |
10169 | rust_union_quirks (struct dwarf2_cu *cu) | |
10170 | { | |
10171 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
10172 | for (type *type_ : cu->rust_unions) |
10173 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
10174 | /* We don't need this any more. */ |
10175 | cu->rust_unions.clear (); | |
c9317f21 TT |
10176 | } |
10177 | ||
95554aad TT |
10178 | /* Return the symtab for PER_CU. This works properly regardless of |
10179 | whether we're using the index or psymtabs. */ | |
10180 | ||
43f3e411 DE |
10181 | static struct compunit_symtab * |
10182 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 10183 | { |
ed2dc618 | 10184 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
10185 | ? per_cu->v.quick->compunit_symtab |
10186 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
10187 | } |
10188 | ||
10189 | /* A helper function for computing the list of all symbol tables | |
10190 | included by PER_CU. */ | |
10191 | ||
10192 | static void | |
4c39bc03 | 10193 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 10194 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 10195 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 10196 | struct compunit_symtab *immediate_parent) |
95554aad TT |
10197 | { |
10198 | void **slot; | |
10199 | int ix; | |
43f3e411 | 10200 | struct compunit_symtab *cust; |
95554aad TT |
10201 | struct dwarf2_per_cu_data *iter; |
10202 | ||
10203 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
10204 | if (*slot != NULL) | |
10205 | { | |
10206 | /* This inclusion and its children have been processed. */ | |
10207 | return; | |
10208 | } | |
10209 | ||
10210 | *slot = per_cu; | |
10211 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
10212 | cust = get_compunit_symtab (per_cu); |
10213 | if (cust != NULL) | |
ec94af83 DE |
10214 | { |
10215 | /* If this is a type unit only add its symbol table if we haven't | |
10216 | seen it yet (type unit per_cu's can share symtabs). */ | |
10217 | if (per_cu->is_debug_types) | |
10218 | { | |
43f3e411 | 10219 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
10220 | if (*slot == NULL) |
10221 | { | |
43f3e411 | 10222 | *slot = cust; |
4c39bc03 | 10223 | result->push_back (cust); |
43f3e411 DE |
10224 | if (cust->user == NULL) |
10225 | cust->user = immediate_parent; | |
ec94af83 DE |
10226 | } |
10227 | } | |
10228 | else | |
f9125b6c | 10229 | { |
4c39bc03 | 10230 | result->push_back (cust); |
43f3e411 DE |
10231 | if (cust->user == NULL) |
10232 | cust->user = immediate_parent; | |
f9125b6c | 10233 | } |
ec94af83 | 10234 | } |
95554aad TT |
10235 | |
10236 | for (ix = 0; | |
796a7ff8 | 10237 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 10238 | ++ix) |
ec94af83 DE |
10239 | { |
10240 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 10241 | all_type_symtabs, iter, cust); |
ec94af83 | 10242 | } |
95554aad TT |
10243 | } |
10244 | ||
43f3e411 | 10245 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
10246 | PER_CU. */ |
10247 | ||
10248 | static void | |
43f3e411 | 10249 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 10250 | { |
f4dc4d17 DE |
10251 | gdb_assert (! per_cu->is_debug_types); |
10252 | ||
796a7ff8 | 10253 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
10254 | { |
10255 | int ix, len; | |
ec94af83 | 10256 | struct dwarf2_per_cu_data *per_cu_iter; |
4c39bc03 | 10257 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 10258 | htab_t all_children, all_type_symtabs; |
43f3e411 | 10259 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
10260 | |
10261 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 10262 | if (cust == NULL) |
95554aad TT |
10263 | return; |
10264 | ||
10265 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
10266 | NULL, xcalloc, xfree); | |
ec94af83 DE |
10267 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
10268 | NULL, xcalloc, xfree); | |
95554aad TT |
10269 | |
10270 | for (ix = 0; | |
796a7ff8 | 10271 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 10272 | ix, per_cu_iter); |
95554aad | 10273 | ++ix) |
ec94af83 DE |
10274 | { |
10275 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 10276 | all_type_symtabs, per_cu_iter, |
43f3e411 | 10277 | cust); |
ec94af83 | 10278 | } |
95554aad | 10279 | |
ec94af83 | 10280 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 10281 | len = result_symtabs.size (); |
43f3e411 | 10282 | cust->includes |
ed2dc618 | 10283 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 10284 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
10285 | memcpy (cust->includes, result_symtabs.data (), |
10286 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 10287 | cust->includes[len] = NULL; |
95554aad | 10288 | |
95554aad | 10289 | htab_delete (all_children); |
ec94af83 | 10290 | htab_delete (all_type_symtabs); |
95554aad TT |
10291 | } |
10292 | } | |
10293 | ||
10294 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
10295 | read. */ | |
10296 | ||
10297 | static void | |
ed2dc618 | 10298 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 10299 | { |
71b73764 | 10300 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
10301 | { |
10302 | if (! iter->is_debug_types) | |
43f3e411 | 10303 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 10304 | } |
95554aad | 10305 | |
c5d0225d | 10306 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
10307 | } |
10308 | ||
9cdd5dbd | 10309 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
10310 | already been loaded into memory. */ |
10311 | ||
10312 | static void | |
95554aad TT |
10313 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
10314 | enum language pretend_language) | |
10b3939b | 10315 | { |
10b3939b | 10316 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
10317 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10318 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 10319 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 10320 | CORE_ADDR lowpc, highpc; |
43f3e411 | 10321 | struct compunit_symtab *cust; |
10b3939b | 10322 | CORE_ADDR baseaddr; |
4359dff1 | 10323 | struct block *static_block; |
3e29f34a | 10324 | CORE_ADDR addr; |
10b3939b DJ |
10325 | |
10326 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
10327 | ||
c89b44cd TT |
10328 | /* Clear the list here in case something was left over. */ |
10329 | cu->method_list.clear (); | |
10b3939b | 10330 | |
95554aad TT |
10331 | cu->language = pretend_language; |
10332 | cu->language_defn = language_def (cu->language); | |
10333 | ||
c906108c | 10334 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 10335 | process_die (cu->dies, cu); |
c906108c | 10336 | |
a766d390 DE |
10337 | /* For now fudge the Go package. */ |
10338 | if (cu->language == language_go) | |
10339 | fixup_go_packaging (cu); | |
10340 | ||
3da10d80 KS |
10341 | /* Now that we have processed all the DIEs in the CU, all the types |
10342 | should be complete, and it should now be safe to compute all of the | |
10343 | physnames. */ | |
10344 | compute_delayed_physnames (cu); | |
3da10d80 | 10345 | |
c9317f21 TT |
10346 | if (cu->language == language_rust) |
10347 | rust_union_quirks (cu); | |
10348 | ||
fae299cd DC |
10349 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
10350 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
10351 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 10352 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 10353 | |
3e29f34a | 10354 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 10355 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
10356 | |
10357 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
10358 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
10359 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
10360 | addrmap to help ensure it has an accurate map of pc values belonging to | |
10361 | this comp unit. */ | |
10362 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
10363 | ||
c24bdb02 | 10364 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
10365 | SECT_OFF_TEXT (objfile), |
10366 | 0); | |
c906108c | 10367 | |
43f3e411 | 10368 | if (cust != NULL) |
c906108c | 10369 | { |
df15bd07 | 10370 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 10371 | |
8be455d7 JK |
10372 | /* Set symtab language to language from DW_AT_language. If the |
10373 | compilation is from a C file generated by language preprocessors, do | |
10374 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 10375 | if (!(cu->language == language_c |
40e3ad0e | 10376 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 10377 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
10378 | |
10379 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
10380 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
10381 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
10382 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
10383 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
10384 | |
10385 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
10386 | needed, it would be wrong due to missing DW_AT_producer there. | |
10387 | ||
10388 | Still one can confuse GDB by using non-standard GCC compilation | |
10389 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
10390 | */ | |
ab260dad | 10391 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 10392 | cust->locations_valid = 1; |
e0d00bc7 JK |
10393 | |
10394 | if (gcc_4_minor >= 5) | |
43f3e411 | 10395 | cust->epilogue_unwind_valid = 1; |
96408a79 | 10396 | |
43f3e411 | 10397 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 10398 | } |
9291a0cd TT |
10399 | |
10400 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10401 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
10402 | else |
10403 | { | |
10404 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10405 | pst->compunit_symtab = cust; |
9291a0cd TT |
10406 | pst->readin = 1; |
10407 | } | |
c906108c | 10408 | |
95554aad | 10409 | /* Push it for inclusion processing later. */ |
c5d0225d | 10410 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
10411 | |
10412 | /* Not needed any more. */ | |
c24bdb02 | 10413 | cu->reset_builder (); |
f4dc4d17 | 10414 | } |
45cfd468 | 10415 | |
f4dc4d17 DE |
10416 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
10417 | already been loaded into memory. */ | |
10418 | ||
10419 | static void | |
10420 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
10421 | enum language pretend_language) | |
10422 | { | |
10423 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
10424 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10425 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 10426 | struct compunit_symtab *cust; |
0186c6a7 DE |
10427 | struct signatured_type *sig_type; |
10428 | ||
10429 | gdb_assert (per_cu->is_debug_types); | |
10430 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 10431 | |
c89b44cd TT |
10432 | /* Clear the list here in case something was left over. */ |
10433 | cu->method_list.clear (); | |
f4dc4d17 | 10434 | |
f4dc4d17 DE |
10435 | cu->language = pretend_language; |
10436 | cu->language_defn = language_def (cu->language); | |
10437 | ||
10438 | /* The symbol tables are set up in read_type_unit_scope. */ | |
10439 | process_die (cu->dies, cu); | |
10440 | ||
10441 | /* For now fudge the Go package. */ | |
10442 | if (cu->language == language_go) | |
10443 | fixup_go_packaging (cu); | |
10444 | ||
10445 | /* Now that we have processed all the DIEs in the CU, all the types | |
10446 | should be complete, and it should now be safe to compute all of the | |
10447 | physnames. */ | |
10448 | compute_delayed_physnames (cu); | |
f4dc4d17 | 10449 | |
c9317f21 TT |
10450 | if (cu->language == language_rust) |
10451 | rust_union_quirks (cu); | |
10452 | ||
f4dc4d17 DE |
10453 | /* TUs share symbol tables. |
10454 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
10455 | of it with end_expandable_symtab. Otherwise, complete the addition of |
10456 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 10457 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 10458 | { |
c24bdb02 KS |
10459 | buildsym_compunit *builder = cu->get_builder (); |
10460 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 10461 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 10462 | |
43f3e411 | 10463 | if (cust != NULL) |
f4dc4d17 DE |
10464 | { |
10465 | /* Set symtab language to language from DW_AT_language. If the | |
10466 | compilation is from a C file generated by language preprocessors, | |
10467 | do not set the language if it was already deduced by | |
10468 | start_subfile. */ | |
43f3e411 DE |
10469 | if (!(cu->language == language_c |
10470 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
10471 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
10472 | } |
10473 | } | |
10474 | else | |
10475 | { | |
c24bdb02 | 10476 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 10477 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
10478 | } |
10479 | ||
10480 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10481 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
10482 | else |
10483 | { | |
10484 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10485 | pst->compunit_symtab = cust; |
f4dc4d17 | 10486 | pst->readin = 1; |
45cfd468 | 10487 | } |
804d2729 TT |
10488 | |
10489 | /* Not needed any more. */ | |
c24bdb02 | 10490 | cu->reset_builder (); |
c906108c SS |
10491 | } |
10492 | ||
95554aad TT |
10493 | /* Process an imported unit DIE. */ |
10494 | ||
10495 | static void | |
10496 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
10497 | { | |
10498 | struct attribute *attr; | |
10499 | ||
f4dc4d17 DE |
10500 | /* For now we don't handle imported units in type units. */ |
10501 | if (cu->per_cu->is_debug_types) | |
10502 | { | |
10503 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
10504 | " supported in type units [in module %s]"), | |
518817b3 | 10505 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
10506 | } |
10507 | ||
95554aad TT |
10508 | attr = dwarf2_attr (die, DW_AT_import, cu); |
10509 | if (attr != NULL) | |
10510 | { | |
9c541725 PA |
10511 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
10512 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
10513 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 10514 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 10515 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 10516 | |
69d751e3 | 10517 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 10518 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 10519 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 10520 | |
796a7ff8 | 10521 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
10522 | per_cu); |
10523 | } | |
10524 | } | |
10525 | ||
4c8aa72d PA |
10526 | /* RAII object that represents a process_die scope: i.e., |
10527 | starts/finishes processing a DIE. */ | |
10528 | class process_die_scope | |
adde2bff | 10529 | { |
4c8aa72d PA |
10530 | public: |
10531 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
10532 | : m_die (die), m_cu (cu) | |
10533 | { | |
10534 | /* We should only be processing DIEs not already in process. */ | |
10535 | gdb_assert (!m_die->in_process); | |
10536 | m_die->in_process = true; | |
10537 | } | |
8c3cb9fa | 10538 | |
4c8aa72d PA |
10539 | ~process_die_scope () |
10540 | { | |
10541 | m_die->in_process = false; | |
10542 | ||
10543 | /* If we're done processing the DIE for the CU that owns the line | |
10544 | header, we don't need the line header anymore. */ | |
10545 | if (m_cu->line_header_die_owner == m_die) | |
10546 | { | |
10547 | delete m_cu->line_header; | |
10548 | m_cu->line_header = NULL; | |
10549 | m_cu->line_header_die_owner = NULL; | |
10550 | } | |
10551 | } | |
10552 | ||
10553 | private: | |
10554 | die_info *m_die; | |
10555 | dwarf2_cu *m_cu; | |
10556 | }; | |
adde2bff | 10557 | |
c906108c SS |
10558 | /* Process a die and its children. */ |
10559 | ||
10560 | static void | |
e7c27a73 | 10561 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10562 | { |
4c8aa72d | 10563 | process_die_scope scope (die, cu); |
adde2bff | 10564 | |
c906108c SS |
10565 | switch (die->tag) |
10566 | { | |
10567 | case DW_TAG_padding: | |
10568 | break; | |
10569 | case DW_TAG_compile_unit: | |
95554aad | 10570 | case DW_TAG_partial_unit: |
e7c27a73 | 10571 | read_file_scope (die, cu); |
c906108c | 10572 | break; |
348e048f DE |
10573 | case DW_TAG_type_unit: |
10574 | read_type_unit_scope (die, cu); | |
10575 | break; | |
c906108c | 10576 | case DW_TAG_subprogram: |
c906108c | 10577 | case DW_TAG_inlined_subroutine: |
edb3359d | 10578 | read_func_scope (die, cu); |
c906108c SS |
10579 | break; |
10580 | case DW_TAG_lexical_block: | |
14898363 L |
10581 | case DW_TAG_try_block: |
10582 | case DW_TAG_catch_block: | |
e7c27a73 | 10583 | read_lexical_block_scope (die, cu); |
c906108c | 10584 | break; |
216f72a1 | 10585 | case DW_TAG_call_site: |
96408a79 SA |
10586 | case DW_TAG_GNU_call_site: |
10587 | read_call_site_scope (die, cu); | |
10588 | break; | |
c906108c | 10589 | case DW_TAG_class_type: |
680b30c7 | 10590 | case DW_TAG_interface_type: |
c906108c SS |
10591 | case DW_TAG_structure_type: |
10592 | case DW_TAG_union_type: | |
134d01f1 | 10593 | process_structure_scope (die, cu); |
c906108c SS |
10594 | break; |
10595 | case DW_TAG_enumeration_type: | |
134d01f1 | 10596 | process_enumeration_scope (die, cu); |
c906108c | 10597 | break; |
134d01f1 | 10598 | |
f792889a DJ |
10599 | /* These dies have a type, but processing them does not create |
10600 | a symbol or recurse to process the children. Therefore we can | |
10601 | read them on-demand through read_type_die. */ | |
c906108c | 10602 | case DW_TAG_subroutine_type: |
72019c9c | 10603 | case DW_TAG_set_type: |
c906108c | 10604 | case DW_TAG_array_type: |
c906108c | 10605 | case DW_TAG_pointer_type: |
c906108c | 10606 | case DW_TAG_ptr_to_member_type: |
c906108c | 10607 | case DW_TAG_reference_type: |
4297a3f0 | 10608 | case DW_TAG_rvalue_reference_type: |
c906108c | 10609 | case DW_TAG_string_type: |
c906108c | 10610 | break; |
134d01f1 | 10611 | |
c906108c | 10612 | case DW_TAG_base_type: |
a02abb62 | 10613 | case DW_TAG_subrange_type: |
cb249c71 | 10614 | case DW_TAG_typedef: |
134d01f1 DJ |
10615 | /* Add a typedef symbol for the type definition, if it has a |
10616 | DW_AT_name. */ | |
f792889a | 10617 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 10618 | break; |
c906108c | 10619 | case DW_TAG_common_block: |
e7c27a73 | 10620 | read_common_block (die, cu); |
c906108c SS |
10621 | break; |
10622 | case DW_TAG_common_inclusion: | |
10623 | break; | |
d9fa45fe | 10624 | case DW_TAG_namespace: |
9068261f | 10625 | cu->processing_has_namespace_info = true; |
e7c27a73 | 10626 | read_namespace (die, cu); |
d9fa45fe | 10627 | break; |
5d7cb8df | 10628 | case DW_TAG_module: |
9068261f | 10629 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
10630 | read_module (die, cu); |
10631 | break; | |
d9fa45fe | 10632 | case DW_TAG_imported_declaration: |
9068261f | 10633 | cu->processing_has_namespace_info = true; |
74921315 KS |
10634 | if (read_namespace_alias (die, cu)) |
10635 | break; | |
86a73007 TT |
10636 | /* The declaration is not a global namespace alias. */ |
10637 | /* Fall through. */ | |
d9fa45fe | 10638 | case DW_TAG_imported_module: |
9068261f | 10639 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
10640 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
10641 | || cu->language != language_fortran)) | |
b98664d3 | 10642 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
10643 | dwarf_tag_name (die->tag)); |
10644 | read_import_statement (die, cu); | |
d9fa45fe | 10645 | break; |
95554aad TT |
10646 | |
10647 | case DW_TAG_imported_unit: | |
10648 | process_imported_unit_die (die, cu); | |
10649 | break; | |
10650 | ||
71a3c369 TT |
10651 | case DW_TAG_variable: |
10652 | read_variable (die, cu); | |
10653 | break; | |
10654 | ||
c906108c | 10655 | default: |
e7c27a73 | 10656 | new_symbol (die, NULL, cu); |
c906108c SS |
10657 | break; |
10658 | } | |
10659 | } | |
ca69b9e6 DE |
10660 | \f |
10661 | /* DWARF name computation. */ | |
c906108c | 10662 | |
94af9270 KS |
10663 | /* A helper function for dwarf2_compute_name which determines whether DIE |
10664 | needs to have the name of the scope prepended to the name listed in the | |
10665 | die. */ | |
10666 | ||
10667 | static int | |
10668 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10669 | { | |
1c809c68 TT |
10670 | struct attribute *attr; |
10671 | ||
94af9270 KS |
10672 | switch (die->tag) |
10673 | { | |
10674 | case DW_TAG_namespace: | |
10675 | case DW_TAG_typedef: | |
10676 | case DW_TAG_class_type: | |
10677 | case DW_TAG_interface_type: | |
10678 | case DW_TAG_structure_type: | |
10679 | case DW_TAG_union_type: | |
10680 | case DW_TAG_enumeration_type: | |
10681 | case DW_TAG_enumerator: | |
10682 | case DW_TAG_subprogram: | |
08a76f8a | 10683 | case DW_TAG_inlined_subroutine: |
94af9270 | 10684 | case DW_TAG_member: |
74921315 | 10685 | case DW_TAG_imported_declaration: |
94af9270 KS |
10686 | return 1; |
10687 | ||
10688 | case DW_TAG_variable: | |
c2b0a229 | 10689 | case DW_TAG_constant: |
94af9270 KS |
10690 | /* We only need to prefix "globally" visible variables. These include |
10691 | any variable marked with DW_AT_external or any variable that | |
10692 | lives in a namespace. [Variables in anonymous namespaces | |
10693 | require prefixing, but they are not DW_AT_external.] */ | |
10694 | ||
10695 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10696 | { | |
10697 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10698 | |
94af9270 KS |
10699 | return die_needs_namespace (die_specification (die, &spec_cu), |
10700 | spec_cu); | |
10701 | } | |
10702 | ||
1c809c68 | 10703 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10704 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10705 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10706 | return 0; |
10707 | /* A variable in a lexical block of some kind does not need a | |
10708 | namespace, even though in C++ such variables may be external | |
10709 | and have a mangled name. */ | |
10710 | if (die->parent->tag == DW_TAG_lexical_block | |
10711 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10712 | || die->parent->tag == DW_TAG_catch_block |
10713 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10714 | return 0; |
10715 | return 1; | |
94af9270 KS |
10716 | |
10717 | default: | |
10718 | return 0; | |
10719 | } | |
10720 | } | |
10721 | ||
73b9be8b KS |
10722 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10723 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10724 | defined for the given DIE. */ | |
10725 | ||
10726 | static struct attribute * | |
10727 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10728 | { | |
10729 | struct attribute *attr; | |
10730 | ||
10731 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10732 | if (attr == NULL) | |
10733 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10734 | ||
10735 | return attr; | |
10736 | } | |
10737 | ||
10738 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10739 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10740 | defined for the given DIE. */ | |
10741 | ||
10742 | static const char * | |
10743 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10744 | { | |
10745 | const char *linkage_name; | |
10746 | ||
10747 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10748 | if (linkage_name == NULL) | |
10749 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10750 | ||
10751 | return linkage_name; | |
10752 | } | |
10753 | ||
94af9270 | 10754 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10755 | compute the physname for the object, which include a method's: |
9c37b5ae | 10756 | - formal parameters (C++), |
a766d390 | 10757 | - receiver type (Go), |
a766d390 DE |
10758 | |
10759 | The term "physname" is a bit confusing. | |
10760 | For C++, for example, it is the demangled name. | |
10761 | For Go, for example, it's the mangled name. | |
94af9270 | 10762 | |
af6b7be1 JB |
10763 | For Ada, return the DIE's linkage name rather than the fully qualified |
10764 | name. PHYSNAME is ignored.. | |
10765 | ||
94af9270 KS |
10766 | The result is allocated on the objfile_obstack and canonicalized. */ |
10767 | ||
10768 | static const char * | |
15d034d0 TT |
10769 | dwarf2_compute_name (const char *name, |
10770 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10771 | int physname) |
10772 | { | |
518817b3 | 10773 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10774 | |
94af9270 KS |
10775 | if (name == NULL) |
10776 | name = dwarf2_name (die, cu); | |
10777 | ||
2ee7123e DE |
10778 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10779 | but otherwise compute it by typename_concat inside GDB. | |
10780 | FIXME: Actually this is not really true, or at least not always true. | |
10781 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
5e2db402 | 10782 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10783 | will set the demangled name to the result of dwarf2_full_name, and it is |
10784 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10785 | if (cu->language == language_ada |
10786 | || (cu->language == language_fortran && physname)) | |
10787 | { | |
10788 | /* For Ada unit, we prefer the linkage name over the name, as | |
10789 | the former contains the exported name, which the user expects | |
10790 | to be able to reference. Ideally, we want the user to be able | |
10791 | to reference this entity using either natural or linkage name, | |
10792 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10793 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10794 | |
2ee7123e DE |
10795 | if (linkage_name != NULL) |
10796 | return linkage_name; | |
f55ee35c JK |
10797 | } |
10798 | ||
94af9270 KS |
10799 | /* These are the only languages we know how to qualify names in. */ |
10800 | if (name != NULL | |
9c37b5ae | 10801 | && (cu->language == language_cplus |
c44af4eb TT |
10802 | || cu->language == language_fortran || cu->language == language_d |
10803 | || cu->language == language_rust)) | |
94af9270 KS |
10804 | { |
10805 | if (die_needs_namespace (die, cu)) | |
10806 | { | |
0d5cff50 | 10807 | const char *prefix; |
34a68019 | 10808 | const char *canonical_name = NULL; |
94af9270 | 10809 | |
d7e74731 PA |
10810 | string_file buf; |
10811 | ||
94af9270 | 10812 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10813 | if (*prefix != '\0') |
10814 | { | |
f55ee35c JK |
10815 | char *prefixed_name = typename_concat (NULL, prefix, name, |
10816 | physname, cu); | |
9a619af0 | 10817 | |
d7e74731 | 10818 | buf.puts (prefixed_name); |
94af9270 KS |
10819 | xfree (prefixed_name); |
10820 | } | |
10821 | else | |
d7e74731 | 10822 | buf.puts (name); |
94af9270 | 10823 | |
98bfdba5 PA |
10824 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10825 | as children with DW_TAG_template_type_param or | |
10826 | DW_TAG_value_type_param. If the latter, add them to the name | |
10827 | here. If the name already has template parameters, then | |
10828 | skip this step; some versions of GCC emit both, and | |
10829 | it is more efficient to use the pre-computed name. | |
10830 | ||
10831 | Something to keep in mind about this process: it is very | |
10832 | unlikely, or in some cases downright impossible, to produce | |
10833 | something that will match the mangled name of a function. | |
10834 | If the definition of the function has the same debug info, | |
10835 | we should be able to match up with it anyway. But fallbacks | |
10836 | using the minimal symbol, for instance to find a method | |
10837 | implemented in a stripped copy of libstdc++, will not work. | |
10838 | If we do not have debug info for the definition, we will have to | |
10839 | match them up some other way. | |
10840 | ||
10841 | When we do name matching there is a related problem with function | |
10842 | templates; two instantiated function templates are allowed to | |
10843 | differ only by their return types, which we do not add here. */ | |
10844 | ||
10845 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10846 | { | |
10847 | struct attribute *attr; | |
10848 | struct die_info *child; | |
10849 | int first = 1; | |
10850 | ||
10851 | die->building_fullname = 1; | |
10852 | ||
10853 | for (child = die->child; child != NULL; child = child->sibling) | |
10854 | { | |
10855 | struct type *type; | |
12df843f | 10856 | LONGEST value; |
d521ce57 | 10857 | const gdb_byte *bytes; |
98bfdba5 PA |
10858 | struct dwarf2_locexpr_baton *baton; |
10859 | struct value *v; | |
10860 | ||
10861 | if (child->tag != DW_TAG_template_type_param | |
10862 | && child->tag != DW_TAG_template_value_param) | |
10863 | continue; | |
10864 | ||
10865 | if (first) | |
10866 | { | |
d7e74731 | 10867 | buf.puts ("<"); |
98bfdba5 PA |
10868 | first = 0; |
10869 | } | |
10870 | else | |
d7e74731 | 10871 | buf.puts (", "); |
98bfdba5 PA |
10872 | |
10873 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10874 | if (attr == NULL) | |
10875 | { | |
b98664d3 | 10876 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10877 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10878 | continue; |
10879 | } | |
10880 | type = die_type (child, cu); | |
10881 | ||
10882 | if (child->tag == DW_TAG_template_type_param) | |
10883 | { | |
c1ec8cea TT |
10884 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10885 | &type_print_raw_options); | |
98bfdba5 PA |
10886 | continue; |
10887 | } | |
10888 | ||
10889 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10890 | if (attr == NULL) | |
10891 | { | |
b98664d3 | 10892 | complaint (_("template parameter missing " |
3e43a32a | 10893 | "DW_AT_const_value")); |
d7e74731 | 10894 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10895 | continue; |
10896 | } | |
10897 | ||
10898 | dwarf2_const_value_attr (attr, type, name, | |
10899 | &cu->comp_unit_obstack, cu, | |
10900 | &value, &bytes, &baton); | |
10901 | ||
10902 | if (TYPE_NOSIGN (type)) | |
10903 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10904 | changed, this can use value_print instead. */ | |
d7e74731 | 10905 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10906 | else |
10907 | { | |
10908 | struct value_print_options opts; | |
10909 | ||
10910 | if (baton != NULL) | |
10911 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10912 | baton->data, | |
10913 | baton->size, | |
10914 | baton->per_cu); | |
10915 | else if (bytes != NULL) | |
10916 | { | |
10917 | v = allocate_value (type); | |
10918 | memcpy (value_contents_writeable (v), bytes, | |
10919 | TYPE_LENGTH (type)); | |
10920 | } | |
10921 | else | |
10922 | v = value_from_longest (type, value); | |
10923 | ||
3e43a32a MS |
10924 | /* Specify decimal so that we do not depend on |
10925 | the radix. */ | |
98bfdba5 PA |
10926 | get_formatted_print_options (&opts, 'd'); |
10927 | opts.raw = 1; | |
d7e74731 | 10928 | value_print (v, &buf, &opts); |
98bfdba5 | 10929 | release_value (v); |
98bfdba5 PA |
10930 | } |
10931 | } | |
10932 | ||
10933 | die->building_fullname = 0; | |
10934 | ||
10935 | if (!first) | |
10936 | { | |
10937 | /* Close the argument list, with a space if necessary | |
10938 | (nested templates). */ | |
d7e74731 PA |
10939 | if (!buf.empty () && buf.string ().back () == '>') |
10940 | buf.puts (" >"); | |
98bfdba5 | 10941 | else |
d7e74731 | 10942 | buf.puts (">"); |
98bfdba5 PA |
10943 | } |
10944 | } | |
10945 | ||
9c37b5ae | 10946 | /* For C++ methods, append formal parameter type |
94af9270 | 10947 | information, if PHYSNAME. */ |
6e70227d | 10948 | |
94af9270 | 10949 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10950 | && cu->language == language_cplus) |
94af9270 KS |
10951 | { |
10952 | struct type *type = read_type_die (die, cu); | |
10953 | ||
d7e74731 | 10954 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10955 | &type_print_raw_options); |
94af9270 | 10956 | |
9c37b5ae | 10957 | if (cu->language == language_cplus) |
94af9270 | 10958 | { |
60430eff DJ |
10959 | /* Assume that an artificial first parameter is |
10960 | "this", but do not crash if it is not. RealView | |
10961 | marks unnamed (and thus unused) parameters as | |
10962 | artificial; there is no way to differentiate | |
10963 | the two cases. */ | |
94af9270 KS |
10964 | if (TYPE_NFIELDS (type) > 0 |
10965 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 10966 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
10967 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10968 | 0)))) | |
d7e74731 | 10969 | buf.puts (" const"); |
94af9270 KS |
10970 | } |
10971 | } | |
10972 | ||
d7e74731 | 10973 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10974 | |
10975 | if (cu->language == language_cplus) | |
34a68019 | 10976 | canonical_name |
322a8516 | 10977 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
10978 | &objfile->per_bfd->storage_obstack); |
10979 | ||
10980 | /* If we only computed INTERMEDIATE_NAME, or if | |
10981 | INTERMEDIATE_NAME is already canonical, then we need to | |
10982 | copy it to the appropriate obstack. */ | |
322a8516 | 10983 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
efba19b0 TT |
10984 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, |
10985 | intermediate_name); | |
34a68019 TT |
10986 | else |
10987 | name = canonical_name; | |
94af9270 KS |
10988 | } |
10989 | } | |
10990 | ||
10991 | return name; | |
10992 | } | |
10993 | ||
0114d602 DJ |
10994 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10995 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10996 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10997 | not have a name. NAME may either be from a previous call to |
10998 | dwarf2_name or NULL. | |
10999 | ||
9c37b5ae | 11000 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
11001 | |
11002 | static const char * | |
15d034d0 | 11003 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 11004 | { |
94af9270 KS |
11005 | return dwarf2_compute_name (name, die, cu, 0); |
11006 | } | |
0114d602 | 11007 | |
94af9270 KS |
11008 | /* Construct a physname for the given DIE in CU. NAME may either be |
11009 | from a previous call to dwarf2_name or NULL. The result will be | |
11010 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
11011 | name. | |
0114d602 | 11012 | |
9c37b5ae | 11013 | The output string will be canonicalized (if C++). */ |
0114d602 | 11014 | |
94af9270 | 11015 | static const char * |
15d034d0 | 11016 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 11017 | { |
518817b3 | 11018 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 11019 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
11020 | int need_copy = 1; |
11021 | ||
11022 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
11023 | on its own. */ | |
11024 | if (!die_needs_namespace (die, cu)) | |
11025 | return dwarf2_compute_name (name, die, cu, 1); | |
11026 | ||
73b9be8b | 11027 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 11028 | |
e98c9e7c TT |
11029 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
11030 | See https://github.com/rust-lang/rust/issues/32925. */ | |
11031 | if (cu->language == language_rust && mangled != NULL | |
11032 | && strchr (mangled, '{') != NULL) | |
11033 | mangled = NULL; | |
11034 | ||
900e11f9 JK |
11035 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
11036 | has computed. */ | |
791afaa2 | 11037 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 11038 | if (mangled != NULL) |
900e11f9 | 11039 | { |
900e11f9 | 11040 | |
59cc4834 JB |
11041 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
11042 | { | |
11043 | /* Do nothing (do not demangle the symbol name). */ | |
11044 | } | |
11045 | else if (cu->language == language_go) | |
a766d390 | 11046 | { |
5e2db402 TT |
11047 | /* This is a lie, but we already lie to the caller new_symbol. |
11048 | new_symbol assumes we return the mangled name. | |
a766d390 | 11049 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
11050 | } |
11051 | else | |
11052 | { | |
0eb876f5 JB |
11053 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
11054 | their return type. It is easier for GDB users to search | |
11055 | for such functions as `name(params)' than `long name(params)'. | |
11056 | In such case the minimal symbol names do not match the full | |
11057 | symbol names but for template functions there is never a need | |
11058 | to look up their definition from their declaration so | |
11059 | the only disadvantage remains the minimal symbol variant | |
11060 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
11061 | demangled.reset (gdb_demangle (mangled, |
11062 | (DMGL_PARAMS | DMGL_ANSI | |
11063 | | DMGL_RET_DROP))); | |
a766d390 | 11064 | } |
900e11f9 | 11065 | if (demangled) |
791afaa2 | 11066 | canon = demangled.get (); |
900e11f9 JK |
11067 | else |
11068 | { | |
11069 | canon = mangled; | |
11070 | need_copy = 0; | |
11071 | } | |
11072 | } | |
11073 | ||
11074 | if (canon == NULL || check_physname) | |
11075 | { | |
11076 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
11077 | ||
11078 | if (canon != NULL && strcmp (physname, canon) != 0) | |
11079 | { | |
11080 | /* It may not mean a bug in GDB. The compiler could also | |
11081 | compute DW_AT_linkage_name incorrectly. But in such case | |
11082 | GDB would need to be bug-to-bug compatible. */ | |
11083 | ||
b98664d3 | 11084 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
11085 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
11086 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 11087 | objfile_name (objfile)); |
900e11f9 JK |
11088 | |
11089 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
11090 | is available here - over computed PHYSNAME. It is safer | |
11091 | against both buggy GDB and buggy compilers. */ | |
11092 | ||
11093 | retval = canon; | |
11094 | } | |
11095 | else | |
11096 | { | |
11097 | retval = physname; | |
11098 | need_copy = 0; | |
11099 | } | |
11100 | } | |
11101 | else | |
11102 | retval = canon; | |
11103 | ||
11104 | if (need_copy) | |
021887d8 | 11105 | retval = obstack_strdup (&objfile->per_bfd->storage_obstack, retval); |
900e11f9 | 11106 | |
900e11f9 | 11107 | return retval; |
0114d602 DJ |
11108 | } |
11109 | ||
74921315 KS |
11110 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
11111 | a new symbol for it. | |
11112 | ||
11113 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
11114 | ||
11115 | static int | |
11116 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
11117 | { | |
11118 | struct attribute *attr; | |
11119 | ||
11120 | /* If the die does not have a name, this is not a namespace | |
11121 | alias. */ | |
11122 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
11123 | if (attr != NULL) | |
11124 | { | |
11125 | int num; | |
11126 | struct die_info *d = die; | |
11127 | struct dwarf2_cu *imported_cu = cu; | |
11128 | ||
11129 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
11130 | keep inspecting DIEs until we hit the underlying import. */ | |
11131 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
11132 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
11133 | { | |
11134 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
11135 | if (attr == NULL) | |
11136 | break; | |
11137 | ||
11138 | d = follow_die_ref (d, attr, &imported_cu); | |
11139 | if (d->tag != DW_TAG_imported_declaration) | |
11140 | break; | |
11141 | } | |
11142 | ||
11143 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
11144 | { | |
b98664d3 | 11145 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 11146 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
11147 | return 0; |
11148 | } | |
11149 | ||
11150 | if (attr != NULL) | |
11151 | { | |
11152 | struct type *type; | |
9c541725 | 11153 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 11154 | |
9c541725 | 11155 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
11156 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
11157 | { | |
11158 | /* This declaration is a global namespace alias. Add | |
11159 | a symbol for it whose type is the aliased namespace. */ | |
11160 | new_symbol (die, type, cu); | |
11161 | return 1; | |
11162 | } | |
11163 | } | |
11164 | } | |
11165 | ||
11166 | return 0; | |
11167 | } | |
11168 | ||
22cee43f | 11169 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 11170 | current context for CU. |
22cee43f PMR |
11171 | |
11172 | For Ada, imported declarations can materialize renamings, which *may* be | |
11173 | global. However it is impossible (for now?) in DWARF to distinguish | |
11174 | "external" imported declarations and "static" ones. As all imported | |
11175 | declarations seem to be static in all other languages, make them all CU-wide | |
11176 | global only in Ada. */ | |
11177 | ||
11178 | static struct using_direct ** | |
804d2729 | 11179 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 11180 | { |
c24bdb02 KS |
11181 | if (cu->language == language_ada |
11182 | && cu->get_builder ()->outermost_context_p ()) | |
11183 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 11184 | else |
c24bdb02 | 11185 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
11186 | } |
11187 | ||
27aa8d6a SW |
11188 | /* Read the import statement specified by the given die and record it. */ |
11189 | ||
11190 | static void | |
11191 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
11192 | { | |
518817b3 | 11193 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 11194 | struct attribute *import_attr; |
32019081 | 11195 | struct die_info *imported_die, *child_die; |
de4affc9 | 11196 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 11197 | const char *imported_name; |
794684b6 | 11198 | const char *imported_name_prefix; |
13387711 SW |
11199 | const char *canonical_name; |
11200 | const char *import_alias; | |
11201 | const char *imported_declaration = NULL; | |
794684b6 | 11202 | const char *import_prefix; |
eb1e02fd | 11203 | std::vector<const char *> excludes; |
13387711 | 11204 | |
27aa8d6a SW |
11205 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
11206 | if (import_attr == NULL) | |
11207 | { | |
b98664d3 | 11208 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
11209 | dwarf_tag_name (die->tag)); |
11210 | return; | |
11211 | } | |
11212 | ||
de4affc9 CC |
11213 | imported_cu = cu; |
11214 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
11215 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
11216 | if (imported_name == NULL) |
11217 | { | |
11218 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
11219 | ||
11220 | The import in the following code: | |
11221 | namespace A | |
11222 | { | |
11223 | typedef int B; | |
11224 | } | |
11225 | ||
11226 | int main () | |
11227 | { | |
11228 | using A::B; | |
11229 | B b; | |
11230 | return b; | |
11231 | } | |
11232 | ||
11233 | ... | |
11234 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
11235 | <52> DW_AT_decl_file : 1 | |
11236 | <53> DW_AT_decl_line : 6 | |
11237 | <54> DW_AT_import : <0x75> | |
11238 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
11239 | <59> DW_AT_name : B | |
11240 | <5b> DW_AT_decl_file : 1 | |
11241 | <5c> DW_AT_decl_line : 2 | |
11242 | <5d> DW_AT_type : <0x6e> | |
11243 | ... | |
11244 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
11245 | <76> DW_AT_byte_size : 4 | |
11246 | <77> DW_AT_encoding : 5 (signed) | |
11247 | ||
11248 | imports the wrong die ( 0x75 instead of 0x58 ). | |
11249 | This case will be ignored until the gcc bug is fixed. */ | |
11250 | return; | |
11251 | } | |
11252 | ||
82856980 SW |
11253 | /* Figure out the local name after import. */ |
11254 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 11255 | |
794684b6 SW |
11256 | /* Figure out where the statement is being imported to. */ |
11257 | import_prefix = determine_prefix (die, cu); | |
11258 | ||
11259 | /* Figure out what the scope of the imported die is and prepend it | |
11260 | to the name of the imported die. */ | |
de4affc9 | 11261 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 11262 | |
f55ee35c JK |
11263 | if (imported_die->tag != DW_TAG_namespace |
11264 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 11265 | { |
13387711 SW |
11266 | imported_declaration = imported_name; |
11267 | canonical_name = imported_name_prefix; | |
794684b6 | 11268 | } |
13387711 | 11269 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 11270 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
11271 | imported_name_prefix, |
11272 | (cu->language == language_d ? "." : "::"), | |
11273 | imported_name, (char *) NULL); | |
13387711 SW |
11274 | else |
11275 | canonical_name = imported_name; | |
794684b6 | 11276 | |
32019081 JK |
11277 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
11278 | for (child_die = die->child; child_die && child_die->tag; | |
11279 | child_die = sibling_die (child_die)) | |
11280 | { | |
11281 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
11282 | represented by an imported module entry with an import attribute | |
11283 | referring to the module and owned entries corresponding to those | |
11284 | entities that are renamed as part of being imported. */ | |
11285 | ||
11286 | if (child_die->tag != DW_TAG_imported_declaration) | |
11287 | { | |
b98664d3 | 11288 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
11289 | "- DIE at %s [in module %s]"), |
11290 | sect_offset_str (child_die->sect_off), | |
11291 | objfile_name (objfile)); | |
32019081 JK |
11292 | continue; |
11293 | } | |
11294 | ||
11295 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
11296 | if (import_attr == NULL) | |
11297 | { | |
b98664d3 | 11298 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
11299 | dwarf_tag_name (child_die->tag)); |
11300 | continue; | |
11301 | } | |
11302 | ||
11303 | imported_cu = cu; | |
11304 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
11305 | &imported_cu); | |
11306 | imported_name = dwarf2_name (imported_die, imported_cu); | |
11307 | if (imported_name == NULL) | |
11308 | { | |
b98664d3 | 11309 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
11310 | "imported name - DIE at %s [in module %s]"), |
11311 | sect_offset_str (child_die->sect_off), | |
11312 | objfile_name (objfile)); | |
32019081 JK |
11313 | continue; |
11314 | } | |
11315 | ||
eb1e02fd | 11316 | excludes.push_back (imported_name); |
32019081 JK |
11317 | |
11318 | process_die (child_die, cu); | |
11319 | } | |
11320 | ||
804d2729 | 11321 | add_using_directive (using_directives (cu), |
22cee43f PMR |
11322 | import_prefix, |
11323 | canonical_name, | |
11324 | import_alias, | |
11325 | imported_declaration, | |
11326 | excludes, | |
11327 | 0, | |
11328 | &objfile->objfile_obstack); | |
27aa8d6a SW |
11329 | } |
11330 | ||
5230b05a WT |
11331 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
11332 | types, but gives them a size of zero. Starting with version 14, | |
11333 | ICC is compatible with GCC. */ | |
11334 | ||
9068261f | 11335 | static bool |
5230b05a WT |
11336 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
11337 | { | |
11338 | if (!cu->checked_producer) | |
11339 | check_producer (cu); | |
11340 | ||
11341 | return cu->producer_is_icc_lt_14; | |
11342 | } | |
11343 | ||
eb77c9df AB |
11344 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
11345 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
11346 | which says that void functions should not have a DW_AT_type. */ | |
11347 | ||
11348 | static bool | |
11349 | producer_is_icc (struct dwarf2_cu *cu) | |
11350 | { | |
11351 | if (!cu->checked_producer) | |
11352 | check_producer (cu); | |
11353 | ||
11354 | return cu->producer_is_icc; | |
11355 | } | |
11356 | ||
1b80a9fa JK |
11357 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
11358 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
11359 | this, it was first present in GCC release 4.3.0. */ | |
11360 | ||
9068261f | 11361 | static bool |
1b80a9fa JK |
11362 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
11363 | { | |
11364 | if (!cu->checked_producer) | |
11365 | check_producer (cu); | |
11366 | ||
11367 | return cu->producer_is_gcc_lt_4_3; | |
11368 | } | |
11369 | ||
d721ba37 PA |
11370 | static file_and_directory |
11371 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 11372 | { |
d721ba37 PA |
11373 | file_and_directory res; |
11374 | ||
9291a0cd TT |
11375 | /* Find the filename. Do not use dwarf2_name here, since the filename |
11376 | is not a source language identifier. */ | |
d721ba37 PA |
11377 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
11378 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 11379 | |
d721ba37 PA |
11380 | if (res.comp_dir == NULL |
11381 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
11382 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 11383 | { |
d721ba37 PA |
11384 | res.comp_dir_storage = ldirname (res.name); |
11385 | if (!res.comp_dir_storage.empty ()) | |
11386 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 11387 | } |
d721ba37 | 11388 | if (res.comp_dir != NULL) |
9291a0cd TT |
11389 | { |
11390 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
11391 | directory, get rid of it. */ | |
d721ba37 | 11392 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 11393 | |
d721ba37 PA |
11394 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
11395 | res.comp_dir = cp + 1; | |
9291a0cd TT |
11396 | } |
11397 | ||
d721ba37 PA |
11398 | if (res.name == NULL) |
11399 | res.name = "<unknown>"; | |
11400 | ||
11401 | return res; | |
9291a0cd TT |
11402 | } |
11403 | ||
f4dc4d17 DE |
11404 | /* Handle DW_AT_stmt_list for a compilation unit. |
11405 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
11406 | COMP_DIR is the compilation directory. LOWPC is passed to |
11407 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
11408 | |
11409 | static void | |
11410 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 11411 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 11412 | { |
518817b3 SM |
11413 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11414 | = cu->per_cu->dwarf2_per_objfile; | |
527f3840 | 11415 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 11416 | struct attribute *attr; |
527f3840 JK |
11417 | struct line_header line_header_local; |
11418 | hashval_t line_header_local_hash; | |
527f3840 JK |
11419 | void **slot; |
11420 | int decode_mapping; | |
2ab95328 | 11421 | |
f4dc4d17 DE |
11422 | gdb_assert (! cu->per_cu->is_debug_types); |
11423 | ||
2ab95328 | 11424 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
11425 | if (attr == NULL) |
11426 | return; | |
11427 | ||
9c541725 | 11428 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
11429 | |
11430 | /* The line header hash table is only created if needed (it exists to | |
11431 | prevent redundant reading of the line table for partial_units). | |
11432 | If we're given a partial_unit, we'll need it. If we're given a | |
11433 | compile_unit, then use the line header hash table if it's already | |
11434 | created, but don't create one just yet. */ | |
11435 | ||
11436 | if (dwarf2_per_objfile->line_header_hash == NULL | |
11437 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 11438 | { |
527f3840 JK |
11439 | dwarf2_per_objfile->line_header_hash |
11440 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
11441 | line_header_eq_voidp, | |
11442 | free_line_header_voidp, | |
11443 | &objfile->objfile_obstack, | |
11444 | hashtab_obstack_allocate, | |
11445 | dummy_obstack_deallocate); | |
11446 | } | |
2ab95328 | 11447 | |
9c541725 | 11448 | line_header_local.sect_off = line_offset; |
527f3840 JK |
11449 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
11450 | line_header_local_hash = line_header_hash (&line_header_local); | |
11451 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
11452 | { | |
11453 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11454 | &line_header_local, | |
11455 | line_header_local_hash, NO_INSERT); | |
11456 | ||
11457 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
11458 | is not present in *SLOT (since if there is something in *SLOT then | |
11459 | it will be for a partial_unit). */ | |
11460 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 11461 | { |
527f3840 | 11462 | gdb_assert (*slot != NULL); |
9a3c8263 | 11463 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 11464 | return; |
dee91e82 | 11465 | } |
2ab95328 | 11466 | } |
527f3840 JK |
11467 | |
11468 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
11469 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
11470 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
11471 | if (lh == NULL) | |
527f3840 | 11472 | return; |
4c8aa72d PA |
11473 | |
11474 | cu->line_header = lh.release (); | |
11475 | cu->line_header_die_owner = die; | |
527f3840 JK |
11476 | |
11477 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
11478 | slot = NULL; | |
11479 | else | |
11480 | { | |
11481 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11482 | &line_header_local, | |
11483 | line_header_local_hash, INSERT); | |
11484 | gdb_assert (slot != NULL); | |
11485 | } | |
11486 | if (slot != NULL && *slot == NULL) | |
11487 | { | |
11488 | /* This newly decoded line number information unit will be owned | |
11489 | by line_header_hash hash table. */ | |
11490 | *slot = cu->line_header; | |
4c8aa72d | 11491 | cu->line_header_die_owner = NULL; |
527f3840 JK |
11492 | } |
11493 | else | |
11494 | { | |
11495 | /* We cannot free any current entry in (*slot) as that struct line_header | |
11496 | may be already used by multiple CUs. Create only temporary decoded | |
11497 | line_header for this CU - it may happen at most once for each line | |
11498 | number information unit. And if we're not using line_header_hash | |
11499 | then this is what we want as well. */ | |
11500 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
11501 | } |
11502 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
11503 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
11504 | decode_mapping); | |
fff8551c | 11505 | |
2ab95328 TT |
11506 | } |
11507 | ||
95554aad | 11508 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 11509 | |
c906108c | 11510 | static void |
e7c27a73 | 11511 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11512 | { |
518817b3 SM |
11513 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11514 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 11515 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 11516 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 11517 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
11518 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
11519 | struct attribute *attr; | |
c906108c | 11520 | struct die_info *child_die; |
e142c38c | 11521 | CORE_ADDR baseaddr; |
6e70227d | 11522 | |
380618d6 | 11523 | prepare_one_comp_unit (cu, die, cu->language); |
e142c38c | 11524 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 11525 | |
fae299cd | 11526 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
11527 | |
11528 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
11529 | from finish_block. */ | |
2acceee2 | 11530 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 11531 | lowpc = highpc; |
3e29f34a | 11532 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 11533 | |
d721ba37 | 11534 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 11535 | |
f4b8a18d KW |
11536 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
11537 | standardised yet. As a workaround for the language detection we fall | |
11538 | back to the DW_AT_producer string. */ | |
11539 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
11540 | cu->language = language_opencl; | |
11541 | ||
3019eac3 DE |
11542 | /* Similar hack for Go. */ |
11543 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
11544 | set_cu_language (DW_LANG_Go, cu); | |
11545 | ||
c24bdb02 | 11546 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
11547 | |
11548 | /* Decode line number information if present. We do this before | |
11549 | processing child DIEs, so that the line header table is available | |
11550 | for DW_AT_decl_file. */ | |
d721ba37 | 11551 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
11552 | |
11553 | /* Process all dies in compilation unit. */ | |
11554 | if (die->child != NULL) | |
11555 | { | |
11556 | child_die = die->child; | |
11557 | while (child_die && child_die->tag) | |
11558 | { | |
11559 | process_die (child_die, cu); | |
11560 | child_die = sibling_die (child_die); | |
11561 | } | |
11562 | } | |
11563 | ||
11564 | /* Decode macro information, if present. Dwarf 2 macro information | |
11565 | refers to information in the line number info statement program | |
11566 | header, so we can only read it if we've read the header | |
11567 | successfully. */ | |
0af92d60 JK |
11568 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
11569 | if (attr == NULL) | |
11570 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
11571 | if (attr && cu->line_header) |
11572 | { | |
11573 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 11574 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 11575 | |
43f3e411 | 11576 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
11577 | } |
11578 | else | |
11579 | { | |
11580 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
11581 | if (attr && cu->line_header) | |
11582 | { | |
11583 | unsigned int macro_offset = DW_UNSND (attr); | |
11584 | ||
43f3e411 | 11585 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
11586 | } |
11587 | } | |
3019eac3 DE |
11588 | } |
11589 | ||
c24bdb02 KS |
11590 | void |
11591 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 11592 | { |
f4dc4d17 DE |
11593 | struct type_unit_group *tu_group; |
11594 | int first_time; | |
3019eac3 | 11595 | struct attribute *attr; |
9c541725 | 11596 | unsigned int i; |
0186c6a7 | 11597 | struct signatured_type *sig_type; |
3019eac3 | 11598 | |
f4dc4d17 | 11599 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 11600 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 11601 | |
c24bdb02 | 11602 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 11603 | |
f4dc4d17 | 11604 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 11605 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 11606 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 11607 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 11608 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
11609 | |
11610 | /* If we've already processed this stmt_list there's no real need to | |
11611 | do it again, we could fake it and just recreate the part we need | |
11612 | (file name,index -> symtab mapping). If data shows this optimization | |
11613 | is useful we can do it then. */ | |
43f3e411 | 11614 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
11615 | |
11616 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
11617 | debug info. */ | |
fff8551c | 11618 | line_header_up lh; |
f4dc4d17 | 11619 | if (attr != NULL) |
3019eac3 | 11620 | { |
9c541725 | 11621 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 11622 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
11623 | } |
11624 | if (lh == NULL) | |
11625 | { | |
11626 | if (first_time) | |
c24bdb02 | 11627 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
11628 | else |
11629 | { | |
11630 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 11631 | gdb_assert (m_builder == nullptr); |
804d2729 | 11632 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11633 | m_builder.reset (new struct buildsym_compunit |
11634 | (COMPUNIT_OBJFILE (cust), "", | |
11635 | COMPUNIT_DIRNAME (cust), | |
11636 | compunit_language (cust), | |
11637 | 0, cust)); | |
f4dc4d17 | 11638 | } |
f4dc4d17 | 11639 | return; |
3019eac3 DE |
11640 | } |
11641 | ||
c24bdb02 KS |
11642 | line_header = lh.release (); |
11643 | line_header_die_owner = die; | |
3019eac3 | 11644 | |
f4dc4d17 DE |
11645 | if (first_time) |
11646 | { | |
c24bdb02 | 11647 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 11648 | |
1fd60fc0 DE |
11649 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
11650 | still initializing it, and our caller (a few levels up) | |
11651 | process_full_type_unit still needs to know if this is the first | |
11652 | time. */ | |
11653 | ||
c24bdb02 | 11654 | tu_group->num_symtabs = line_header->file_names.size (); |
4c8aa72d | 11655 | tu_group->symtabs = XNEWVEC (struct symtab *, |
c24bdb02 | 11656 | line_header->file_names.size ()); |
3019eac3 | 11657 | |
c24bdb02 | 11658 | for (i = 0; i < line_header->file_names.size (); ++i) |
f4dc4d17 | 11659 | { |
c24bdb02 | 11660 | file_entry &fe = line_header->file_names[i]; |
3019eac3 | 11661 | |
c24bdb02 KS |
11662 | dwarf2_start_subfile (this, fe.name, |
11663 | fe.include_dir (line_header)); | |
11664 | buildsym_compunit *b = get_builder (); | |
11665 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 11666 | { |
4c8aa72d PA |
11667 | /* NOTE: start_subfile will recognize when it's been |
11668 | passed a file it has already seen. So we can't | |
11669 | assume there's a simple mapping from | |
11670 | cu->line_header->file_names to subfiles, plus | |
11671 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
11672 | b->get_current_subfile ()->symtab |
11673 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
11674 | } |
11675 | ||
c24bdb02 | 11676 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 11677 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
11678 | } |
11679 | } | |
11680 | else | |
3019eac3 | 11681 | { |
c24bdb02 | 11682 | gdb_assert (m_builder == nullptr); |
804d2729 | 11683 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11684 | m_builder.reset (new struct buildsym_compunit |
11685 | (COMPUNIT_OBJFILE (cust), "", | |
11686 | COMPUNIT_DIRNAME (cust), | |
11687 | compunit_language (cust), | |
11688 | 0, cust)); | |
f4dc4d17 | 11689 | |
c24bdb02 | 11690 | for (i = 0; i < line_header->file_names.size (); ++i) |
f4dc4d17 | 11691 | { |
c24bdb02 | 11692 | file_entry &fe = line_header->file_names[i]; |
f4dc4d17 | 11693 | |
4c8aa72d | 11694 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11695 | } |
3019eac3 DE |
11696 | } |
11697 | ||
f4dc4d17 DE |
11698 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11699 | so they don't have a "real" (so to speak) symtab anyway. | |
11700 | There is later code that will assign the main symtab to all symbols | |
11701 | that don't have one. We need to handle the case of a symbol with a | |
11702 | missing symtab (DW_AT_decl_file) anyway. */ | |
11703 | } | |
3019eac3 | 11704 | |
f4dc4d17 DE |
11705 | /* Process DW_TAG_type_unit. |
11706 | For TUs we want to skip the first top level sibling if it's not the | |
11707 | actual type being defined by this TU. In this case the first top | |
11708 | level sibling is there to provide context only. */ | |
3019eac3 | 11709 | |
f4dc4d17 DE |
11710 | static void |
11711 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11712 | { | |
11713 | struct die_info *child_die; | |
3019eac3 | 11714 | |
f4dc4d17 DE |
11715 | prepare_one_comp_unit (cu, die, language_minimal); |
11716 | ||
11717 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11718 | We do this before processing child DIEs, so that the line header table | |
11719 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 11720 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
11721 | |
11722 | if (die->child != NULL) | |
11723 | { | |
11724 | child_die = die->child; | |
11725 | while (child_die && child_die->tag) | |
11726 | { | |
11727 | process_die (child_die, cu); | |
11728 | child_die = sibling_die (child_die); | |
11729 | } | |
11730 | } | |
3019eac3 DE |
11731 | } |
11732 | \f | |
80626a55 DE |
11733 | /* DWO/DWP files. |
11734 | ||
11735 | http://gcc.gnu.org/wiki/DebugFission | |
11736 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11737 | ||
11738 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11739 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11740 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11741 | |
11742 | static hashval_t | |
11743 | hash_dwo_file (const void *item) | |
11744 | { | |
9a3c8263 | 11745 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11746 | hashval_t hash; |
3019eac3 | 11747 | |
a2ce51a0 DE |
11748 | hash = htab_hash_string (dwo_file->dwo_name); |
11749 | if (dwo_file->comp_dir != NULL) | |
11750 | hash += htab_hash_string (dwo_file->comp_dir); | |
11751 | return hash; | |
3019eac3 DE |
11752 | } |
11753 | ||
11754 | static int | |
11755 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11756 | { | |
9a3c8263 SM |
11757 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11758 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11759 | |
a2ce51a0 DE |
11760 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11761 | return 0; | |
11762 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11763 | return lhs->comp_dir == rhs->comp_dir; | |
11764 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11765 | } |
11766 | ||
11767 | /* Allocate a hash table for DWO files. */ | |
11768 | ||
51ac9db5 | 11769 | static htab_up |
ed2dc618 | 11770 | allocate_dwo_file_hash_table (struct objfile *objfile) |
3019eac3 | 11771 | { |
51ac9db5 SM |
11772 | auto delete_dwo_file = [] (void *item) |
11773 | { | |
11774 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11775 | ||
11776 | delete dwo_file; | |
11777 | }; | |
11778 | ||
11779 | return htab_up (htab_create_alloc_ex (41, | |
11780 | hash_dwo_file, | |
11781 | eq_dwo_file, | |
11782 | delete_dwo_file, | |
11783 | &objfile->objfile_obstack, | |
11784 | hashtab_obstack_allocate, | |
11785 | dummy_obstack_deallocate)); | |
3019eac3 DE |
11786 | } |
11787 | ||
80626a55 DE |
11788 | /* Lookup DWO file DWO_NAME. */ |
11789 | ||
11790 | static void ** | |
ed2dc618 SM |
11791 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11792 | const char *dwo_name, | |
11793 | const char *comp_dir) | |
80626a55 DE |
11794 | { |
11795 | struct dwo_file find_entry; | |
11796 | void **slot; | |
11797 | ||
11798 | if (dwarf2_per_objfile->dwo_files == NULL) | |
ed2dc618 SM |
11799 | dwarf2_per_objfile->dwo_files |
11800 | = allocate_dwo_file_hash_table (dwarf2_per_objfile->objfile); | |
80626a55 | 11801 | |
0ac5b59e DE |
11802 | find_entry.dwo_name = dwo_name; |
11803 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11804 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11805 | INSERT); | |
80626a55 DE |
11806 | |
11807 | return slot; | |
11808 | } | |
11809 | ||
3019eac3 DE |
11810 | static hashval_t |
11811 | hash_dwo_unit (const void *item) | |
11812 | { | |
9a3c8263 | 11813 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11814 | |
11815 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11816 | return dwo_unit->signature; | |
11817 | } | |
11818 | ||
11819 | static int | |
11820 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11821 | { | |
9a3c8263 SM |
11822 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11823 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11824 | |
11825 | /* The signature is assumed to be unique within the DWO file. | |
11826 | So while object file CU dwo_id's always have the value zero, | |
11827 | that's OK, assuming each object file DWO file has only one CU, | |
11828 | and that's the rule for now. */ | |
11829 | return lhs->signature == rhs->signature; | |
11830 | } | |
11831 | ||
11832 | /* Allocate a hash table for DWO CUs,TUs. | |
11833 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11834 | ||
11835 | static htab_t | |
11836 | allocate_dwo_unit_table (struct objfile *objfile) | |
11837 | { | |
11838 | /* Start out with a pretty small number. | |
11839 | Generally DWO files contain only one CU and maybe some TUs. */ | |
11840 | return htab_create_alloc_ex (3, | |
11841 | hash_dwo_unit, | |
11842 | eq_dwo_unit, | |
11843 | NULL, | |
11844 | &objfile->objfile_obstack, | |
11845 | hashtab_obstack_allocate, | |
11846 | dummy_obstack_deallocate); | |
11847 | } | |
11848 | ||
80626a55 | 11849 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 11850 | |
19c3d4c9 | 11851 | struct create_dwo_cu_data |
3019eac3 DE |
11852 | { |
11853 | struct dwo_file *dwo_file; | |
19c3d4c9 | 11854 | struct dwo_unit dwo_unit; |
3019eac3 DE |
11855 | }; |
11856 | ||
19c3d4c9 | 11857 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11858 | |
11859 | static void | |
19c3d4c9 DE |
11860 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11861 | const gdb_byte *info_ptr, | |
11862 | struct die_info *comp_unit_die, | |
11863 | int has_children, | |
11864 | void *datap) | |
3019eac3 DE |
11865 | { |
11866 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11867 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11868 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 11869 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 11870 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 11871 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 11872 | |
a084a2a6 AT |
11873 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11874 | if (!signature.has_value ()) | |
3019eac3 | 11875 | { |
b98664d3 | 11876 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11877 | " its dwo_id [in module %s]"), |
9d8780f0 | 11878 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11879 | return; |
11880 | } | |
11881 | ||
3019eac3 | 11882 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11883 | dwo_unit->signature = *signature; |
8a0459fd | 11884 | dwo_unit->section = section; |
9c541725 | 11885 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11886 | dwo_unit->length = cu->per_cu->length; |
11887 | ||
b4f54984 | 11888 | if (dwarf_read_debug) |
9d8780f0 SM |
11889 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11890 | sect_offset_str (sect_off), | |
9c541725 | 11891 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11892 | } |
11893 | ||
33c5cd75 | 11894 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11895 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11896 | |
33c5cd75 | 11897 | static void |
ed2dc618 SM |
11898 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11899 | struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
33c5cd75 | 11900 | htab_t &cus_htab) |
3019eac3 DE |
11901 | { |
11902 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11903 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11904 | |
33c5cd75 DB |
11905 | dwarf2_read_section (objfile, §ion); |
11906 | info_ptr = section.buffer; | |
3019eac3 DE |
11907 | |
11908 | if (info_ptr == NULL) | |
33c5cd75 | 11909 | return; |
3019eac3 | 11910 | |
b4f54984 | 11911 | if (dwarf_read_debug) |
19c3d4c9 DE |
11912 | { |
11913 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
11914 | get_section_name (§ion), |
11915 | get_section_file_name (§ion)); | |
19c3d4c9 | 11916 | } |
3019eac3 | 11917 | |
33c5cd75 | 11918 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11919 | while (info_ptr < end_ptr) |
11920 | { | |
11921 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
11922 | struct create_dwo_cu_data create_dwo_cu_data; |
11923 | struct dwo_unit *dwo_unit; | |
11924 | void **slot; | |
11925 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 11926 | |
19c3d4c9 DE |
11927 | memset (&create_dwo_cu_data.dwo_unit, 0, |
11928 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 | 11929 | memset (&per_cu, 0, sizeof (per_cu)); |
e3b94546 | 11930 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11931 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11932 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11933 | per_cu.section = §ion; | |
c5ed0576 | 11934 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
11935 | |
11936 | init_cutu_and_read_dies_no_follow ( | |
11937 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
11938 | info_ptr += per_cu.length; | |
11939 | ||
11940 | // If the unit could not be parsed, skip it. | |
11941 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
11942 | continue; | |
3019eac3 | 11943 | |
33c5cd75 DB |
11944 | if (cus_htab == NULL) |
11945 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 11946 | |
33c5cd75 DB |
11947 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
11948 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
11949 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
11950 | gdb_assert (slot != NULL); | |
11951 | if (*slot != NULL) | |
19c3d4c9 | 11952 | { |
33c5cd75 DB |
11953 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11954 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11955 | |
b98664d3 | 11956 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11957 | " the entry at offset %s, signature %s"), |
11958 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11959 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11960 | } |
33c5cd75 | 11961 | *slot = (void *)dwo_unit; |
3019eac3 | 11962 | } |
3019eac3 DE |
11963 | } |
11964 | ||
80626a55 DE |
11965 | /* DWP file .debug_{cu,tu}_index section format: |
11966 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11967 | ||
d2415c6c DE |
11968 | DWP Version 1: |
11969 | ||
80626a55 DE |
11970 | Both index sections have the same format, and serve to map a 64-bit |
11971 | signature to a set of section numbers. Each section begins with a header, | |
11972 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11973 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11974 | aligned at 8-byte boundaries in the file. | |
11975 | ||
d2415c6c DE |
11976 | The index section header consists of: |
11977 | ||
11978 | V, 32 bit version number | |
11979 | -, 32 bits unused | |
11980 | N, 32 bit number of compilation units or type units in the index | |
11981 | M, 32 bit number of slots in the hash table | |
80626a55 | 11982 | |
d2415c6c | 11983 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11984 | |
d2415c6c DE |
11985 | The hash table begins at offset 16 in the section, and consists of an array |
11986 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11987 | order of the application binary). Unused slots in the hash table are 0. | |
11988 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11989 | |
d2415c6c DE |
11990 | The parallel table begins immediately after the hash table |
11991 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11992 | array of 32-bit indexes (using the byte order of the application binary), | |
11993 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11994 | table contains a 32-bit index into the pool of section numbers. For unused | |
11995 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11996 | |
73869dc2 DE |
11997 | The pool of section numbers begins immediately following the hash table |
11998 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11999 | section numbers consists of an array of 32-bit words (using the byte order | |
12000 | of the application binary). Each item in the array is indexed starting | |
12001 | from 0. The hash table entry provides the index of the first section | |
12002 | number in the set. Additional section numbers in the set follow, and the | |
12003 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
12004 | ||
12005 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
12006 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
12007 | be the second entry. Other members of the set may follow in any order. | |
12008 | ||
12009 | --- | |
12010 | ||
12011 | DWP Version 2: | |
12012 | ||
12013 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
12014 | and the entries in the index tables are now offsets into these sections. | |
12015 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
12016 | section. | |
12017 | ||
12018 | Index Section Contents: | |
12019 | Header | |
12020 | Hash Table of Signatures dwp_hash_table.hash_table | |
12021 | Parallel Table of Indices dwp_hash_table.unit_table | |
12022 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
12023 | Table of Section Sizes dwp_hash_table.v2.sizes | |
12024 | ||
12025 | The index section header consists of: | |
12026 | ||
12027 | V, 32 bit version number | |
12028 | L, 32 bit number of columns in the table of section offsets | |
12029 | N, 32 bit number of compilation units or type units in the index | |
12030 | M, 32 bit number of slots in the hash table | |
12031 | ||
12032 | Numbers are recorded using the byte order of the application binary. | |
12033 | ||
12034 | The hash table has the same format as version 1. | |
12035 | The parallel table of indices has the same format as version 1, | |
12036 | except that the entries are origin-1 indices into the table of sections | |
12037 | offsets and the table of section sizes. | |
12038 | ||
12039 | The table of offsets begins immediately following the parallel table | |
12040 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
12041 | a two-dimensional array of 32-bit words (using the byte order of the | |
12042 | application binary), with L columns and N+1 rows, in row-major order. | |
12043 | Each row in the array is indexed starting from 0. The first row provides | |
12044 | a key to the remaining rows: each column in this row provides an identifier | |
12045 | for a debug section, and the offsets in the same column of subsequent rows | |
12046 | refer to that section. The section identifiers are: | |
12047 | ||
12048 | DW_SECT_INFO 1 .debug_info.dwo | |
12049 | DW_SECT_TYPES 2 .debug_types.dwo | |
12050 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
12051 | DW_SECT_LINE 4 .debug_line.dwo | |
12052 | DW_SECT_LOC 5 .debug_loc.dwo | |
12053 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
12054 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
12055 | DW_SECT_MACRO 8 .debug_macro.dwo | |
12056 | ||
12057 | The offsets provided by the CU and TU index sections are the base offsets | |
12058 | for the contributions made by each CU or TU to the corresponding section | |
12059 | in the package file. Each CU and TU header contains an abbrev_offset | |
12060 | field, used to find the abbreviations table for that CU or TU within the | |
12061 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
12062 | be interpreted as relative to the base offset given in the index section. | |
12063 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
12064 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
12065 | and offsets into other debug sections obtained from DWARF attributes should | |
12066 | also be interpreted as relative to the corresponding base offset. | |
12067 | ||
12068 | The table of sizes begins immediately following the table of offsets. | |
12069 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
12070 | with L columns and N rows, in row-major order. Each row in the array is | |
12071 | indexed starting from 1 (row 0 is shared by the two tables). | |
12072 | ||
12073 | --- | |
12074 | ||
12075 | Hash table lookup is handled the same in version 1 and 2: | |
12076 | ||
12077 | We assume that N and M will not exceed 2^32 - 1. | |
12078 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
12079 | ||
d2415c6c DE |
12080 | Given a 64-bit compilation unit signature or a type signature S, an entry |
12081 | in the hash table is located as follows: | |
80626a55 | 12082 | |
d2415c6c DE |
12083 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
12084 | the low-order k bits all set to 1. | |
80626a55 | 12085 | |
d2415c6c | 12086 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 12087 | |
d2415c6c DE |
12088 | 3) If the hash table entry at index H matches the signature, use that |
12089 | entry. If the hash table entry at index H is unused (all zeroes), | |
12090 | terminate the search: the signature is not present in the table. | |
80626a55 | 12091 | |
d2415c6c | 12092 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 12093 | |
d2415c6c | 12094 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 12095 | to stop at an unused slot or find the match. */ |
80626a55 DE |
12096 | |
12097 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
12098 | .debug_{info,types}.dwo in DWP_FILE. | |
12099 | Returns NULL if there isn't one. | |
12100 | Note: This function processes DWP files only, not DWO files. */ | |
12101 | ||
12102 | static struct dwp_hash_table * | |
ed2dc618 SM |
12103 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12104 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
12105 | { |
12106 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 12107 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 12108 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 12109 | struct dwarf2_section_info *index; |
73869dc2 | 12110 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
12111 | struct dwp_hash_table *htab; |
12112 | ||
12113 | if (is_debug_types) | |
12114 | index = &dwp_file->sections.tu_index; | |
12115 | else | |
12116 | index = &dwp_file->sections.cu_index; | |
12117 | ||
12118 | if (dwarf2_section_empty_p (index)) | |
12119 | return NULL; | |
12120 | dwarf2_read_section (objfile, index); | |
12121 | ||
12122 | index_ptr = index->buffer; | |
12123 | index_end = index_ptr + index->size; | |
12124 | ||
12125 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
12126 | index_ptr += 4; |
12127 | if (version == 2) | |
12128 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
12129 | else | |
12130 | nr_columns = 0; | |
12131 | index_ptr += 4; | |
80626a55 DE |
12132 | nr_units = read_4_bytes (dbfd, index_ptr); |
12133 | index_ptr += 4; | |
12134 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
12135 | index_ptr += 4; | |
12136 | ||
73869dc2 | 12137 | if (version != 1 && version != 2) |
80626a55 | 12138 | { |
21aa081e | 12139 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 12140 | " [in module %s]"), |
21aa081e | 12141 | pulongest (version), dwp_file->name); |
80626a55 DE |
12142 | } |
12143 | if (nr_slots != (nr_slots & -nr_slots)) | |
12144 | { | |
21aa081e | 12145 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 12146 | " is not power of 2 [in module %s]"), |
21aa081e | 12147 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
12148 | } |
12149 | ||
12150 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
12151 | htab->version = version; |
12152 | htab->nr_columns = nr_columns; | |
80626a55 DE |
12153 | htab->nr_units = nr_units; |
12154 | htab->nr_slots = nr_slots; | |
12155 | htab->hash_table = index_ptr; | |
12156 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
12157 | |
12158 | /* Exit early if the table is empty. */ | |
12159 | if (nr_slots == 0 || nr_units == 0 | |
12160 | || (version == 2 && nr_columns == 0)) | |
12161 | { | |
12162 | /* All must be zero. */ | |
12163 | if (nr_slots != 0 || nr_units != 0 | |
12164 | || (version == 2 && nr_columns != 0)) | |
12165 | { | |
b98664d3 | 12166 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
12167 | " all zero [in modules %s]"), |
12168 | dwp_file->name); | |
12169 | } | |
12170 | return htab; | |
12171 | } | |
12172 | ||
12173 | if (version == 1) | |
12174 | { | |
12175 | htab->section_pool.v1.indices = | |
12176 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12177 | /* It's harder to decide whether the section is too small in v1. | |
12178 | V1 is deprecated anyway so we punt. */ | |
12179 | } | |
12180 | else | |
12181 | { | |
12182 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12183 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 12184 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
12185 | /* Reverse map for error checking. */ |
12186 | int ids_seen[DW_SECT_MAX + 1]; | |
12187 | int i; | |
12188 | ||
12189 | if (nr_columns < 2) | |
12190 | { | |
12191 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
12192 | " in section table [in module %s]"), | |
12193 | dwp_file->name); | |
12194 | } | |
12195 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
12196 | { | |
12197 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
12198 | " in section table [in module %s]"), | |
12199 | dwp_file->name); | |
12200 | } | |
04fd5eed GB |
12201 | memset (ids, 255, sizeof_ids); |
12202 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
12203 | for (i = 0; i < nr_columns; ++i) |
12204 | { | |
12205 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
12206 | ||
12207 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
12208 | { | |
12209 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
12210 | " in section table [in module %s]"), | |
12211 | id, dwp_file->name); | |
12212 | } | |
12213 | if (ids_seen[id] != -1) | |
12214 | { | |
12215 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
12216 | " id %d in section table [in module %s]"), | |
12217 | id, dwp_file->name); | |
12218 | } | |
12219 | ids_seen[id] = i; | |
12220 | ids[i] = id; | |
12221 | } | |
12222 | /* Must have exactly one info or types section. */ | |
12223 | if (((ids_seen[DW_SECT_INFO] != -1) | |
12224 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
12225 | != 1) | |
12226 | { | |
12227 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
12228 | " DWO info/types section [in module %s]"), | |
12229 | dwp_file->name); | |
12230 | } | |
12231 | /* Must have an abbrev section. */ | |
12232 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
12233 | { | |
12234 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
12235 | " section [in module %s]"), | |
12236 | dwp_file->name); | |
12237 | } | |
12238 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
12239 | htab->section_pool.v2.sizes = | |
12240 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
12241 | * nr_units * nr_columns); | |
12242 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
12243 | * nr_units * nr_columns)) | |
12244 | > index_end) | |
12245 | { | |
12246 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
12247 | " [in module %s]"), | |
12248 | dwp_file->name); | |
12249 | } | |
12250 | } | |
80626a55 DE |
12251 | |
12252 | return htab; | |
12253 | } | |
12254 | ||
12255 | /* Update SECTIONS with the data from SECTP. | |
12256 | ||
12257 | This function is like the other "locate" section routines that are | |
12258 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 12259 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
12260 | |
12261 | The result is non-zero for success, or zero if an error was found. */ | |
12262 | ||
12263 | static int | |
73869dc2 DE |
12264 | locate_v1_virtual_dwo_sections (asection *sectp, |
12265 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
12266 | { |
12267 | const struct dwop_section_names *names = &dwop_section_names; | |
12268 | ||
12269 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12270 | { | |
12271 | /* There can be only one. */ | |
049412e3 | 12272 | if (sections->abbrev.s.section != NULL) |
80626a55 | 12273 | return 0; |
049412e3 | 12274 | sections->abbrev.s.section = sectp; |
80626a55 DE |
12275 | sections->abbrev.size = bfd_get_section_size (sectp); |
12276 | } | |
12277 | else if (section_is_p (sectp->name, &names->info_dwo) | |
12278 | || section_is_p (sectp->name, &names->types_dwo)) | |
12279 | { | |
12280 | /* There can be only one. */ | |
049412e3 | 12281 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 12282 | return 0; |
049412e3 | 12283 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
12284 | sections->info_or_types.size = bfd_get_section_size (sectp); |
12285 | } | |
12286 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12287 | { | |
12288 | /* There can be only one. */ | |
049412e3 | 12289 | if (sections->line.s.section != NULL) |
80626a55 | 12290 | return 0; |
049412e3 | 12291 | sections->line.s.section = sectp; |
80626a55 DE |
12292 | sections->line.size = bfd_get_section_size (sectp); |
12293 | } | |
12294 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12295 | { | |
12296 | /* There can be only one. */ | |
049412e3 | 12297 | if (sections->loc.s.section != NULL) |
80626a55 | 12298 | return 0; |
049412e3 | 12299 | sections->loc.s.section = sectp; |
80626a55 DE |
12300 | sections->loc.size = bfd_get_section_size (sectp); |
12301 | } | |
12302 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12303 | { | |
12304 | /* There can be only one. */ | |
049412e3 | 12305 | if (sections->macinfo.s.section != NULL) |
80626a55 | 12306 | return 0; |
049412e3 | 12307 | sections->macinfo.s.section = sectp; |
80626a55 DE |
12308 | sections->macinfo.size = bfd_get_section_size (sectp); |
12309 | } | |
12310 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12311 | { | |
12312 | /* There can be only one. */ | |
049412e3 | 12313 | if (sections->macro.s.section != NULL) |
80626a55 | 12314 | return 0; |
049412e3 | 12315 | sections->macro.s.section = sectp; |
80626a55 DE |
12316 | sections->macro.size = bfd_get_section_size (sectp); |
12317 | } | |
12318 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12319 | { | |
12320 | /* There can be only one. */ | |
049412e3 | 12321 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 12322 | return 0; |
049412e3 | 12323 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
12324 | sections->str_offsets.size = bfd_get_section_size (sectp); |
12325 | } | |
12326 | else | |
12327 | { | |
12328 | /* No other kind of section is valid. */ | |
12329 | return 0; | |
12330 | } | |
12331 | ||
12332 | return 1; | |
12333 | } | |
12334 | ||
73869dc2 DE |
12335 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
12336 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12337 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12338 | This is for DWP version 1 files. */ | |
80626a55 DE |
12339 | |
12340 | static struct dwo_unit * | |
ed2dc618 SM |
12341 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12342 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12343 | uint32_t unit_index, |
12344 | const char *comp_dir, | |
12345 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
12346 | { |
12347 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
12348 | const struct dwp_hash_table *dwp_htab = |
12349 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12350 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
12351 | const char *kind = is_debug_types ? "TU" : "CU"; |
12352 | struct dwo_file *dwo_file; | |
12353 | struct dwo_unit *dwo_unit; | |
73869dc2 | 12354 | struct virtual_v1_dwo_sections sections; |
80626a55 | 12355 | void **dwo_file_slot; |
80626a55 DE |
12356 | int i; |
12357 | ||
73869dc2 DE |
12358 | gdb_assert (dwp_file->version == 1); |
12359 | ||
b4f54984 | 12360 | if (dwarf_read_debug) |
80626a55 | 12361 | { |
73869dc2 | 12362 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 12363 | kind, |
73869dc2 | 12364 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
12365 | dwp_file->name); |
12366 | } | |
12367 | ||
19ac8c2e | 12368 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
12369 | Put a limit on the number of sections we look for so that bad data |
12370 | doesn't cause us to loop forever. */ | |
12371 | ||
73869dc2 | 12372 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
12373 | (1 /* .debug_info or .debug_types */ \ |
12374 | + 1 /* .debug_abbrev */ \ | |
12375 | + 1 /* .debug_line */ \ | |
12376 | + 1 /* .debug_loc */ \ | |
12377 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 12378 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
12379 | + 1 /* trailing zero */) |
12380 | ||
12381 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 12382 | |
73869dc2 | 12383 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
12384 | { |
12385 | asection *sectp; | |
12386 | uint32_t section_nr = | |
12387 | read_4_bytes (dbfd, | |
73869dc2 DE |
12388 | dwp_htab->section_pool.v1.indices |
12389 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
12390 | |
12391 | if (section_nr == 0) | |
12392 | break; | |
12393 | if (section_nr >= dwp_file->num_sections) | |
12394 | { | |
12395 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
12396 | " [in module %s]"), | |
12397 | dwp_file->name); | |
12398 | } | |
12399 | ||
12400 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 12401 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
12402 | { |
12403 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
12404 | " [in module %s]"), | |
12405 | dwp_file->name); | |
12406 | } | |
12407 | } | |
12408 | ||
12409 | if (i < 2 | |
a32a8923 DE |
12410 | || dwarf2_section_empty_p (§ions.info_or_types) |
12411 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
12412 | { |
12413 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
12414 | " [in module %s]"), | |
12415 | dwp_file->name); | |
12416 | } | |
73869dc2 | 12417 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
12418 | { |
12419 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
12420 | " [in module %s]"), | |
12421 | dwp_file->name); | |
12422 | } | |
12423 | ||
12424 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12425 | have dwo_unit "live" in that. At least for now. | |
12426 | ||
12427 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 12428 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
12429 | file, we can combine them back into a virtual DWO file to save space |
12430 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
12431 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
12432 | ||
791afaa2 TT |
12433 | std::string virtual_dwo_name = |
12434 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
12435 | get_section_id (§ions.abbrev), | |
12436 | get_section_id (§ions.line), | |
12437 | get_section_id (§ions.loc), | |
12438 | get_section_id (§ions.str_offsets)); | |
80626a55 | 12439 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12440 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12441 | virtual_dwo_name.c_str (), | |
12442 | comp_dir); | |
80626a55 DE |
12443 | /* Create one if necessary. */ |
12444 | if (*dwo_file_slot == NULL) | |
12445 | { | |
b4f54984 | 12446 | if (dwarf_read_debug) |
80626a55 DE |
12447 | { |
12448 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12449 | virtual_dwo_name.c_str ()); |
80626a55 | 12450 | } |
51ac9db5 | 12451 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12452 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12453 | virtual_dwo_name); | |
0ac5b59e | 12454 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
12455 | dwo_file->sections.abbrev = sections.abbrev; |
12456 | dwo_file->sections.line = sections.line; | |
12457 | dwo_file->sections.loc = sections.loc; | |
12458 | dwo_file->sections.macinfo = sections.macinfo; | |
12459 | dwo_file->sections.macro = sections.macro; | |
12460 | dwo_file->sections.str_offsets = sections.str_offsets; | |
12461 | /* The "str" section is global to the entire DWP file. */ | |
12462 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 12463 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
12464 | there's no need to record it in dwo_file. |
12465 | Also, we can't simply record type sections in dwo_file because | |
12466 | we record a pointer into the vector in dwo_unit. As we collect more | |
12467 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
12468 | for it, invalidating all copies of pointers into the previous |
12469 | contents. */ | |
80626a55 DE |
12470 | *dwo_file_slot = dwo_file; |
12471 | } | |
12472 | else | |
12473 | { | |
b4f54984 | 12474 | if (dwarf_read_debug) |
80626a55 DE |
12475 | { |
12476 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12477 | virtual_dwo_name.c_str ()); |
80626a55 | 12478 | } |
9a3c8263 | 12479 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 12480 | } |
80626a55 DE |
12481 | |
12482 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12483 | dwo_unit->dwo_file = dwo_file; | |
12484 | dwo_unit->signature = signature; | |
8d749320 SM |
12485 | dwo_unit->section = |
12486 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 12487 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 12488 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
12489 | |
12490 | return dwo_unit; | |
12491 | } | |
12492 | ||
73869dc2 DE |
12493 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
12494 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
12495 | piece within that section used by a TU/CU, return a virtual section | |
12496 | of just that piece. */ | |
12497 | ||
12498 | static struct dwarf2_section_info | |
ed2dc618 SM |
12499 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12500 | struct dwarf2_section_info *section, | |
73869dc2 DE |
12501 | bfd_size_type offset, bfd_size_type size) |
12502 | { | |
12503 | struct dwarf2_section_info result; | |
12504 | asection *sectp; | |
12505 | ||
12506 | gdb_assert (section != NULL); | |
12507 | gdb_assert (!section->is_virtual); | |
12508 | ||
12509 | memset (&result, 0, sizeof (result)); | |
12510 | result.s.containing_section = section; | |
dc4ccb6f | 12511 | result.is_virtual = true; |
73869dc2 DE |
12512 | |
12513 | if (size == 0) | |
12514 | return result; | |
12515 | ||
12516 | sectp = get_section_bfd_section (section); | |
12517 | ||
12518 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
12519 | bounds of the real section. This is a pretty-rare event, so just | |
12520 | flag an error (easier) instead of a warning and trying to cope. */ | |
12521 | if (sectp == NULL | |
12522 | || offset + size > bfd_get_section_size (sectp)) | |
12523 | { | |
73869dc2 DE |
12524 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
12525 | " in section %s [in module %s]"), | |
12526 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
12527 | objfile_name (dwarf2_per_objfile->objfile)); | |
12528 | } | |
12529 | ||
12530 | result.virtual_offset = offset; | |
12531 | result.size = size; | |
12532 | return result; | |
12533 | } | |
12534 | ||
12535 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
12536 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12537 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12538 | This is for DWP version 2 files. */ | |
12539 | ||
12540 | static struct dwo_unit * | |
ed2dc618 SM |
12541 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12542 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12543 | uint32_t unit_index, |
12544 | const char *comp_dir, | |
12545 | ULONGEST signature, int is_debug_types) | |
12546 | { | |
12547 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12548 | const struct dwp_hash_table *dwp_htab = | |
12549 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12550 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
12551 | const char *kind = is_debug_types ? "TU" : "CU"; |
12552 | struct dwo_file *dwo_file; | |
12553 | struct dwo_unit *dwo_unit; | |
12554 | struct virtual_v2_dwo_sections sections; | |
12555 | void **dwo_file_slot; | |
73869dc2 DE |
12556 | int i; |
12557 | ||
12558 | gdb_assert (dwp_file->version == 2); | |
12559 | ||
b4f54984 | 12560 | if (dwarf_read_debug) |
73869dc2 DE |
12561 | { |
12562 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
12563 | kind, | |
12564 | pulongest (unit_index), hex_string (signature), | |
12565 | dwp_file->name); | |
12566 | } | |
12567 | ||
12568 | /* Fetch the section offsets of this DWO unit. */ | |
12569 | ||
12570 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
12571 | |
12572 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
12573 | { | |
12574 | uint32_t offset = read_4_bytes (dbfd, | |
12575 | dwp_htab->section_pool.v2.offsets | |
12576 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12577 | + i) | |
12578 | * sizeof (uint32_t))); | |
12579 | uint32_t size = read_4_bytes (dbfd, | |
12580 | dwp_htab->section_pool.v2.sizes | |
12581 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12582 | + i) | |
12583 | * sizeof (uint32_t))); | |
12584 | ||
12585 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
12586 | { | |
12587 | case DW_SECT_INFO: | |
12588 | case DW_SECT_TYPES: | |
12589 | sections.info_or_types_offset = offset; | |
12590 | sections.info_or_types_size = size; | |
12591 | break; | |
12592 | case DW_SECT_ABBREV: | |
12593 | sections.abbrev_offset = offset; | |
12594 | sections.abbrev_size = size; | |
12595 | break; | |
12596 | case DW_SECT_LINE: | |
12597 | sections.line_offset = offset; | |
12598 | sections.line_size = size; | |
12599 | break; | |
12600 | case DW_SECT_LOC: | |
12601 | sections.loc_offset = offset; | |
12602 | sections.loc_size = size; | |
12603 | break; | |
12604 | case DW_SECT_STR_OFFSETS: | |
12605 | sections.str_offsets_offset = offset; | |
12606 | sections.str_offsets_size = size; | |
12607 | break; | |
12608 | case DW_SECT_MACINFO: | |
12609 | sections.macinfo_offset = offset; | |
12610 | sections.macinfo_size = size; | |
12611 | break; | |
12612 | case DW_SECT_MACRO: | |
12613 | sections.macro_offset = offset; | |
12614 | sections.macro_size = size; | |
12615 | break; | |
12616 | } | |
12617 | } | |
12618 | ||
12619 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12620 | have dwo_unit "live" in that. At least for now. | |
12621 | ||
12622 | The DWP file can be made up of a random collection of CUs and TUs. | |
12623 | However, for each CU + set of TUs that came from the same original DWO | |
12624 | file, we can combine them back into a virtual DWO file to save space | |
12625 | (fewer struct dwo_file objects to allocate). Remember that for really | |
12626 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
12627 | ||
791afaa2 TT |
12628 | std::string virtual_dwo_name = |
12629 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
12630 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
12631 | (long) (sections.line_size ? sections.line_offset : 0), | |
12632 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
12633 | (long) (sections.str_offsets_size | |
12634 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 12635 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12636 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12637 | virtual_dwo_name.c_str (), | |
12638 | comp_dir); | |
73869dc2 DE |
12639 | /* Create one if necessary. */ |
12640 | if (*dwo_file_slot == NULL) | |
12641 | { | |
b4f54984 | 12642 | if (dwarf_read_debug) |
73869dc2 DE |
12643 | { |
12644 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12645 | virtual_dwo_name.c_str ()); |
73869dc2 | 12646 | } |
51ac9db5 | 12647 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12648 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12649 | virtual_dwo_name); | |
73869dc2 DE |
12650 | dwo_file->comp_dir = comp_dir; |
12651 | dwo_file->sections.abbrev = | |
ed2dc618 | 12652 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
12653 | sections.abbrev_offset, sections.abbrev_size); |
12654 | dwo_file->sections.line = | |
ed2dc618 | 12655 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
12656 | sections.line_offset, sections.line_size); |
12657 | dwo_file->sections.loc = | |
ed2dc618 | 12658 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
12659 | sections.loc_offset, sections.loc_size); |
12660 | dwo_file->sections.macinfo = | |
ed2dc618 | 12661 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
12662 | sections.macinfo_offset, sections.macinfo_size); |
12663 | dwo_file->sections.macro = | |
ed2dc618 | 12664 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
12665 | sections.macro_offset, sections.macro_size); |
12666 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
12667 | create_dwp_v2_section (dwarf2_per_objfile, |
12668 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
12669 | sections.str_offsets_offset, |
12670 | sections.str_offsets_size); | |
12671 | /* The "str" section is global to the entire DWP file. */ | |
12672 | dwo_file->sections.str = dwp_file->sections.str; | |
12673 | /* The info or types section is assigned below to dwo_unit, | |
12674 | there's no need to record it in dwo_file. | |
12675 | Also, we can't simply record type sections in dwo_file because | |
12676 | we record a pointer into the vector in dwo_unit. As we collect more | |
12677 | types we'll grow the vector and eventually have to reallocate space | |
12678 | for it, invalidating all copies of pointers into the previous | |
12679 | contents. */ | |
12680 | *dwo_file_slot = dwo_file; | |
12681 | } | |
12682 | else | |
12683 | { | |
b4f54984 | 12684 | if (dwarf_read_debug) |
73869dc2 DE |
12685 | { |
12686 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12687 | virtual_dwo_name.c_str ()); |
73869dc2 | 12688 | } |
9a3c8263 | 12689 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 12690 | } |
73869dc2 DE |
12691 | |
12692 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12693 | dwo_unit->dwo_file = dwo_file; | |
12694 | dwo_unit->signature = signature; | |
8d749320 SM |
12695 | dwo_unit->section = |
12696 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
12697 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
12698 | is_debug_types | |
73869dc2 DE |
12699 | ? &dwp_file->sections.types |
12700 | : &dwp_file->sections.info, | |
12701 | sections.info_or_types_offset, | |
12702 | sections.info_or_types_size); | |
12703 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12704 | ||
12705 | return dwo_unit; | |
12706 | } | |
12707 | ||
57d63ce2 DE |
12708 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12709 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12710 | |
12711 | static struct dwo_unit * | |
ed2dc618 SM |
12712 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12713 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 12714 | ULONGEST signature, int is_debug_types) |
80626a55 | 12715 | { |
57d63ce2 DE |
12716 | const struct dwp_hash_table *dwp_htab = |
12717 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12718 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 12719 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12720 | uint32_t hash = signature & mask; |
12721 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12722 | unsigned int i; | |
12723 | void **slot; | |
870f88f7 | 12724 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12725 | |
12726 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12727 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
12728 | slot = htab_find_slot (is_debug_types |
12729 | ? dwp_file->loaded_tus | |
12730 | : dwp_file->loaded_cus, | |
12731 | &find_dwo_cu, INSERT); | |
80626a55 DE |
12732 | |
12733 | if (*slot != NULL) | |
9a3c8263 | 12734 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12735 | |
12736 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12737 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12738 | { |
12739 | ULONGEST signature_in_table; | |
12740 | ||
12741 | signature_in_table = | |
57d63ce2 | 12742 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12743 | if (signature_in_table == signature) |
12744 | { | |
57d63ce2 DE |
12745 | uint32_t unit_index = |
12746 | read_4_bytes (dbfd, | |
12747 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12748 | |
73869dc2 DE |
12749 | if (dwp_file->version == 1) |
12750 | { | |
ed2dc618 SM |
12751 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
12752 | dwp_file, unit_index, | |
73869dc2 DE |
12753 | comp_dir, signature, |
12754 | is_debug_types); | |
12755 | } | |
12756 | else | |
12757 | { | |
ed2dc618 SM |
12758 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
12759 | dwp_file, unit_index, | |
73869dc2 DE |
12760 | comp_dir, signature, |
12761 | is_debug_types); | |
12762 | } | |
9a3c8263 | 12763 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12764 | } |
12765 | if (signature_in_table == 0) | |
12766 | return NULL; | |
12767 | hash = (hash + hash2) & mask; | |
12768 | } | |
12769 | ||
12770 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12771 | " [in module %s]"), | |
12772 | dwp_file->name); | |
12773 | } | |
12774 | ||
ab5088bf | 12775 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12776 | Open the file specified by FILE_NAME and hand it off to BFD for |
12777 | preliminary analysis. Return a newly initialized bfd *, which | |
12778 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12779 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12780 | SEARCH_CWD is true if the current directory is to be searched. |
12781 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12782 | If successful, the file is added to the bfd include table of the |
12783 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12784 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12785 | NOTE: This function is derived from symfile_bfd_open. */ |
12786 | ||
192b62ce | 12787 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12788 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12789 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12790 | { |
24b9144d | 12791 | int desc; |
9c02c129 DE |
12792 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12793 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12794 | to debug_file_directory. */ | |
e0cc99a6 | 12795 | const char *search_path; |
9c02c129 DE |
12796 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12797 | ||
e0cc99a6 | 12798 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12799 | if (search_cwd) |
12800 | { | |
12801 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12802 | { |
12803 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12804 | debug_file_directory, | |
12805 | (char *) NULL)); | |
12806 | search_path = search_path_holder.get (); | |
12807 | } | |
6ac97d4c | 12808 | else |
e0cc99a6 | 12809 | search_path = "."; |
6ac97d4c | 12810 | } |
9c02c129 | 12811 | else |
e0cc99a6 | 12812 | search_path = debug_file_directory; |
3019eac3 | 12813 | |
24b9144d | 12814 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12815 | if (is_dwp) |
12816 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12817 | |
12818 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12819 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12820 | O_RDONLY | O_BINARY, &absolute_name); |
12821 | if (desc < 0) | |
12822 | return NULL; | |
12823 | ||
e0cc99a6 TT |
12824 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12825 | gnutarget, desc)); | |
9c02c129 DE |
12826 | if (sym_bfd == NULL) |
12827 | return NULL; | |
192b62ce | 12828 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12829 | |
192b62ce TT |
12830 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12831 | return NULL; | |
3019eac3 | 12832 | |
13aaf454 DE |
12833 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12834 | This is important because things like demangled_names_hash lives in the | |
12835 | objfile's per_bfd space and may have references to things like symbol | |
12836 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12837 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12838 | |
3019eac3 DE |
12839 | return sym_bfd; |
12840 | } | |
12841 | ||
ab5088bf | 12842 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12843 | COMP_DIR is the DW_AT_comp_dir attribute. |
12844 | The result is the bfd handle of the file. | |
12845 | If there is a problem finding or opening the file, return NULL. | |
12846 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12847 | same as symfile_bfd_open. */ | |
12848 | ||
192b62ce | 12849 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12850 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12851 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12852 | { |
80626a55 | 12853 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12854 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12855 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12856 | |
12857 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12858 | ||
12859 | if (comp_dir != NULL) | |
12860 | { | |
b36cec19 PA |
12861 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
12862 | file_name, (char *) NULL); | |
3019eac3 DE |
12863 | |
12864 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12865 | search path, which seems useful. */ | |
ed2dc618 SM |
12866 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
12867 | path_to_try, | |
12868 | 0 /*is_dwp*/, | |
192b62ce | 12869 | 1 /*search_cwd*/)); |
3019eac3 DE |
12870 | xfree (path_to_try); |
12871 | if (abfd != NULL) | |
12872 | return abfd; | |
12873 | } | |
12874 | ||
12875 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12876 | is a list of paths. */ | |
12877 | ||
12878 | if (*debug_file_directory == '\0') | |
12879 | return NULL; | |
12880 | ||
ed2dc618 SM |
12881 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12882 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12883 | } |
12884 | ||
80626a55 DE |
12885 | /* This function is mapped across the sections and remembers the offset and |
12886 | size of each of the DWO debugging sections we are interested in. */ | |
12887 | ||
12888 | static void | |
12889 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12890 | { | |
9a3c8263 | 12891 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12892 | const struct dwop_section_names *names = &dwop_section_names; |
12893 | ||
12894 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12895 | { | |
049412e3 | 12896 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
12897 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
12898 | } | |
12899 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12900 | { | |
049412e3 | 12901 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
12902 | dwo_sections->info.size = bfd_get_section_size (sectp); |
12903 | } | |
12904 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12905 | { | |
049412e3 | 12906 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
12907 | dwo_sections->line.size = bfd_get_section_size (sectp); |
12908 | } | |
12909 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12910 | { | |
049412e3 | 12911 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
12912 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
12913 | } | |
12914 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12915 | { | |
049412e3 | 12916 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
12917 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
12918 | } | |
12919 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12920 | { | |
049412e3 | 12921 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
12922 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
12923 | } | |
12924 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12925 | { | |
049412e3 | 12926 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
12927 | dwo_sections->str.size = bfd_get_section_size (sectp); |
12928 | } | |
12929 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12930 | { | |
049412e3 | 12931 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
12932 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
12933 | } | |
12934 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12935 | { | |
12936 | struct dwarf2_section_info type_section; | |
12937 | ||
12938 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12939 | type_section.s.section = sectp; |
80626a55 | 12940 | type_section.size = bfd_get_section_size (sectp); |
fd5866f6 | 12941 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12942 | } |
12943 | } | |
12944 | ||
ab5088bf | 12945 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12946 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12947 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12948 | |
12949 | static struct dwo_file * | |
0ac5b59e DE |
12950 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12951 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12952 | { |
ed2dc618 | 12953 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12954 | |
fb1eb2f9 | 12955 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12956 | if (dbfd == NULL) |
12957 | { | |
b4f54984 | 12958 | if (dwarf_read_debug) |
80626a55 DE |
12959 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12960 | return NULL; | |
12961 | } | |
263db9a1 | 12962 | |
51ac9db5 | 12963 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12964 | dwo_file->dwo_name = dwo_name; |
12965 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12966 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12967 | |
fb1eb2f9 | 12968 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 12969 | &dwo_file->sections); |
3019eac3 | 12970 | |
ed2dc618 SM |
12971 | create_cus_hash_table (dwarf2_per_objfile, *dwo_file, dwo_file->sections.info, |
12972 | dwo_file->cus); | |
3019eac3 | 12973 | |
263db9a1 | 12974 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12975 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12976 | |
b4f54984 | 12977 | if (dwarf_read_debug) |
80626a55 DE |
12978 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12979 | ||
263db9a1 | 12980 | return dwo_file.release (); |
3019eac3 DE |
12981 | } |
12982 | ||
80626a55 | 12983 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12984 | size of each of the DWP debugging sections common to version 1 and 2 that |
12985 | we are interested in. */ | |
3019eac3 | 12986 | |
80626a55 | 12987 | static void |
73869dc2 DE |
12988 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12989 | void *dwp_file_ptr) | |
3019eac3 | 12990 | { |
9a3c8263 | 12991 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12992 | const struct dwop_section_names *names = &dwop_section_names; |
12993 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12994 | |
80626a55 | 12995 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12996 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12997 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12998 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12999 | |
80626a55 DE |
13000 | /* Look for specific sections that we need. */ |
13001 | if (section_is_p (sectp->name, &names->str_dwo)) | |
13002 | { | |
049412e3 | 13003 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
13004 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
13005 | } | |
13006 | else if (section_is_p (sectp->name, &names->cu_index)) | |
13007 | { | |
049412e3 | 13008 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
13009 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
13010 | } | |
13011 | else if (section_is_p (sectp->name, &names->tu_index)) | |
13012 | { | |
049412e3 | 13013 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
13014 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
13015 | } | |
13016 | } | |
3019eac3 | 13017 | |
73869dc2 DE |
13018 | /* This function is mapped across the sections and remembers the offset and |
13019 | size of each of the DWP version 2 debugging sections that we are interested | |
13020 | in. This is split into a separate function because we don't know if we | |
13021 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
13022 | ||
13023 | static void | |
13024 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
13025 | { | |
9a3c8263 | 13026 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
13027 | const struct dwop_section_names *names = &dwop_section_names; |
13028 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
13029 | ||
13030 | /* Record the ELF section number for later lookup: this is what the | |
13031 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
13032 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
13033 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
13034 | ||
13035 | /* Look for specific sections that we need. */ | |
13036 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
13037 | { | |
049412e3 | 13038 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
13039 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
13040 | } | |
13041 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
13042 | { | |
049412e3 | 13043 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
13044 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
13045 | } | |
13046 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
13047 | { | |
049412e3 | 13048 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
13049 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
13050 | } | |
13051 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
13052 | { | |
049412e3 | 13053 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
13054 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
13055 | } | |
13056 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
13057 | { | |
049412e3 | 13058 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
13059 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
13060 | } | |
13061 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
13062 | { | |
049412e3 | 13063 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
13064 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
13065 | } | |
13066 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13067 | { | |
049412e3 | 13068 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
13069 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
13070 | } | |
13071 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13072 | { | |
049412e3 | 13073 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
13074 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
13075 | } | |
13076 | } | |
13077 | ||
80626a55 | 13078 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13079 | |
80626a55 DE |
13080 | static hashval_t |
13081 | hash_dwp_loaded_cutus (const void *item) | |
13082 | { | |
9a3c8263 | 13083 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 13084 | |
80626a55 DE |
13085 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
13086 | return dwo_unit->signature; | |
3019eac3 DE |
13087 | } |
13088 | ||
80626a55 | 13089 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13090 | |
80626a55 DE |
13091 | static int |
13092 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 13093 | { |
9a3c8263 SM |
13094 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
13095 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 13096 | |
80626a55 DE |
13097 | return dua->signature == dub->signature; |
13098 | } | |
3019eac3 | 13099 | |
80626a55 | 13100 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13101 | |
80626a55 DE |
13102 | static htab_t |
13103 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
13104 | { | |
13105 | return htab_create_alloc_ex (3, | |
13106 | hash_dwp_loaded_cutus, | |
13107 | eq_dwp_loaded_cutus, | |
13108 | NULL, | |
13109 | &objfile->objfile_obstack, | |
13110 | hashtab_obstack_allocate, | |
13111 | dummy_obstack_deallocate); | |
13112 | } | |
3019eac3 | 13113 | |
ab5088bf DE |
13114 | /* Try to open DWP file FILE_NAME. |
13115 | The result is the bfd handle of the file. | |
13116 | If there is a problem finding or opening the file, return NULL. | |
13117 | Upon success, the canonicalized path of the file is stored in the bfd, | |
13118 | same as symfile_bfd_open. */ | |
13119 | ||
192b62ce | 13120 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
13121 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
13122 | const char *file_name) | |
ab5088bf | 13123 | { |
ed2dc618 SM |
13124 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
13125 | 1 /*is_dwp*/, | |
192b62ce | 13126 | 1 /*search_cwd*/)); |
6ac97d4c DE |
13127 | if (abfd != NULL) |
13128 | return abfd; | |
13129 | ||
13130 | /* Work around upstream bug 15652. | |
13131 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
13132 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
13133 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
13134 | of the executable's path may have discarded the needed info. | |
13135 | [IWBN if the dwp file name was recorded in the executable, akin to | |
13136 | .gnu_debuglink, but that doesn't exist yet.] | |
13137 | Strip the directory from FILE_NAME and search again. */ | |
13138 | if (*debug_file_directory != '\0') | |
13139 | { | |
13140 | /* Don't implicitly search the current directory here. | |
13141 | If the user wants to search "." to handle this case, | |
13142 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
13143 | return try_open_dwop_file (dwarf2_per_objfile, |
13144 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
13145 | 0 /*search_cwd*/); |
13146 | } | |
13147 | ||
13148 | return NULL; | |
ab5088bf DE |
13149 | } |
13150 | ||
80626a55 DE |
13151 | /* Initialize the use of the DWP file for the current objfile. |
13152 | By convention the name of the DWP file is ${objfile}.dwp. | |
13153 | The result is NULL if it can't be found. */ | |
a766d390 | 13154 | |
400174b1 | 13155 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 13156 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
13157 | { |
13158 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 13159 | |
82bf32bc JK |
13160 | /* Try to find first .dwp for the binary file before any symbolic links |
13161 | resolving. */ | |
6c447423 DE |
13162 | |
13163 | /* If the objfile is a debug file, find the name of the real binary | |
13164 | file and get the name of dwp file from there. */ | |
d721ba37 | 13165 | std::string dwp_name; |
6c447423 DE |
13166 | if (objfile->separate_debug_objfile_backlink != NULL) |
13167 | { | |
13168 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
13169 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 13170 | |
d721ba37 | 13171 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
13172 | } |
13173 | else | |
d721ba37 PA |
13174 | dwp_name = objfile->original_name; |
13175 | ||
13176 | dwp_name += ".dwp"; | |
80626a55 | 13177 | |
ed2dc618 | 13178 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
13179 | if (dbfd == NULL |
13180 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
13181 | { | |
13182 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
13183 | dwp_name = objfile_name (objfile); |
13184 | dwp_name += ".dwp"; | |
ed2dc618 | 13185 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
13186 | } |
13187 | ||
80626a55 DE |
13188 | if (dbfd == NULL) |
13189 | { | |
b4f54984 | 13190 | if (dwarf_read_debug) |
d721ba37 | 13191 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 13192 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 13193 | } |
400174b1 TT |
13194 | |
13195 | const char *name = bfd_get_filename (dbfd.get ()); | |
13196 | std::unique_ptr<struct dwp_file> dwp_file | |
13197 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 13198 | |
0a0f4c01 | 13199 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
13200 | dwp_file->elf_sections = |
13201 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
13202 | dwp_file->num_sections, asection *); | |
13203 | ||
400174b1 TT |
13204 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13205 | dwarf2_locate_common_dwp_sections, | |
13206 | dwp_file.get ()); | |
80626a55 | 13207 | |
400174b1 TT |
13208 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13209 | 0); | |
80626a55 | 13210 | |
400174b1 TT |
13211 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13212 | 1); | |
80626a55 | 13213 | |
73869dc2 | 13214 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
13215 | if (dwp_file->cus && dwp_file->tus |
13216 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
13217 | { |
13218 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 13219 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 13220 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
13221 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
13222 | " TU version %s [in DWP file %s]"), | |
13223 | pulongest (dwp_file->cus->version), | |
d721ba37 | 13224 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 13225 | } |
08302ed2 DE |
13226 | |
13227 | if (dwp_file->cus) | |
13228 | dwp_file->version = dwp_file->cus->version; | |
13229 | else if (dwp_file->tus) | |
13230 | dwp_file->version = dwp_file->tus->version; | |
13231 | else | |
13232 | dwp_file->version = 2; | |
73869dc2 DE |
13233 | |
13234 | if (dwp_file->version == 2) | |
400174b1 TT |
13235 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13236 | dwarf2_locate_v2_dwp_sections, | |
13237 | dwp_file.get ()); | |
73869dc2 | 13238 | |
19ac8c2e DE |
13239 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
13240 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 13241 | |
b4f54984 | 13242 | if (dwarf_read_debug) |
80626a55 DE |
13243 | { |
13244 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
13245 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
13246 | " %s CUs, %s TUs\n", |
13247 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
13248 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
13249 | } |
13250 | ||
13251 | return dwp_file; | |
3019eac3 | 13252 | } |
c906108c | 13253 | |
ab5088bf DE |
13254 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
13255 | ||
13256 | static struct dwp_file * | |
ed2dc618 | 13257 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
13258 | { |
13259 | if (! dwarf2_per_objfile->dwp_checked) | |
13260 | { | |
ed2dc618 SM |
13261 | dwarf2_per_objfile->dwp_file |
13262 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
13263 | dwarf2_per_objfile->dwp_checked = 1; |
13264 | } | |
400174b1 | 13265 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
13266 | } |
13267 | ||
80626a55 DE |
13268 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
13269 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
13270 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 13271 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
13272 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
13273 | ||
13274 | This is called, for example, when wanting to read a variable with a | |
13275 | complex location. Therefore we don't want to do file i/o for every call. | |
13276 | Therefore we don't want to look for a DWO file on every call. | |
13277 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
13278 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
13279 | for a DWO file. | |
13280 | ||
1c658ad5 | 13281 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 13282 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 13283 | |
3019eac3 | 13284 | static struct dwo_unit * |
80626a55 DE |
13285 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
13286 | const char *dwo_name, const char *comp_dir, | |
13287 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 13288 | { |
ed2dc618 | 13289 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 13290 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
13291 | const char *kind = is_debug_types ? "TU" : "CU"; |
13292 | void **dwo_file_slot; | |
3019eac3 | 13293 | struct dwo_file *dwo_file; |
80626a55 | 13294 | struct dwp_file *dwp_file; |
cb1df416 | 13295 | |
6a506a2d DE |
13296 | /* First see if there's a DWP file. |
13297 | If we have a DWP file but didn't find the DWO inside it, don't | |
13298 | look for the original DWO file. It makes gdb behave differently | |
13299 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 13300 | |
ed2dc618 | 13301 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 13302 | if (dwp_file != NULL) |
cf2c3c16 | 13303 | { |
80626a55 DE |
13304 | const struct dwp_hash_table *dwp_htab = |
13305 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
13306 | ||
13307 | if (dwp_htab != NULL) | |
13308 | { | |
13309 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 13310 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 13311 | signature, is_debug_types); |
80626a55 DE |
13312 | |
13313 | if (dwo_cutu != NULL) | |
13314 | { | |
b4f54984 | 13315 | if (dwarf_read_debug) |
80626a55 DE |
13316 | { |
13317 | fprintf_unfiltered (gdb_stdlog, | |
13318 | "Virtual DWO %s %s found: @%s\n", | |
13319 | kind, hex_string (signature), | |
13320 | host_address_to_string (dwo_cutu)); | |
13321 | } | |
13322 | return dwo_cutu; | |
13323 | } | |
13324 | } | |
13325 | } | |
6a506a2d | 13326 | else |
80626a55 | 13327 | { |
6a506a2d | 13328 | /* No DWP file, look for the DWO file. */ |
80626a55 | 13329 | |
ed2dc618 SM |
13330 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
13331 | dwo_name, comp_dir); | |
6a506a2d | 13332 | if (*dwo_file_slot == NULL) |
80626a55 | 13333 | { |
6a506a2d DE |
13334 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
13335 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 13336 | } |
6a506a2d | 13337 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 13338 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 13339 | |
6a506a2d | 13340 | if (dwo_file != NULL) |
19c3d4c9 | 13341 | { |
6a506a2d DE |
13342 | struct dwo_unit *dwo_cutu = NULL; |
13343 | ||
13344 | if (is_debug_types && dwo_file->tus) | |
13345 | { | |
13346 | struct dwo_unit find_dwo_cutu; | |
13347 | ||
13348 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13349 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
13350 | dwo_cutu |
13351 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 13352 | } |
33c5cd75 | 13353 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 13354 | { |
33c5cd75 DB |
13355 | struct dwo_unit find_dwo_cutu; |
13356 | ||
13357 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13358 | find_dwo_cutu.signature = signature; | |
13359 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
13360 | &find_dwo_cutu); | |
6a506a2d DE |
13361 | } |
13362 | ||
13363 | if (dwo_cutu != NULL) | |
13364 | { | |
b4f54984 | 13365 | if (dwarf_read_debug) |
6a506a2d DE |
13366 | { |
13367 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
13368 | kind, dwo_name, hex_string (signature), | |
13369 | host_address_to_string (dwo_cutu)); | |
13370 | } | |
13371 | return dwo_cutu; | |
80626a55 DE |
13372 | } |
13373 | } | |
2e276125 | 13374 | } |
9cdd5dbd | 13375 | |
80626a55 DE |
13376 | /* We didn't find it. This could mean a dwo_id mismatch, or |
13377 | someone deleted the DWO/DWP file, or the search path isn't set up | |
13378 | correctly to find the file. */ | |
13379 | ||
b4f54984 | 13380 | if (dwarf_read_debug) |
80626a55 DE |
13381 | { |
13382 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
13383 | kind, dwo_name, hex_string (signature)); | |
13384 | } | |
3019eac3 | 13385 | |
6656a72d DE |
13386 | /* This is a warning and not a complaint because it can be caused by |
13387 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
13388 | { |
13389 | /* Print the name of the DWP file if we looked there, helps the user | |
13390 | better diagnose the problem. */ | |
791afaa2 | 13391 | std::string dwp_text; |
43942612 DE |
13392 | |
13393 | if (dwp_file != NULL) | |
791afaa2 TT |
13394 | dwp_text = string_printf (" [in DWP file %s]", |
13395 | lbasename (dwp_file->name)); | |
43942612 | 13396 | |
9d8780f0 | 13397 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
13398 | " [in module %s]"), |
13399 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 13400 | dwp_text.c_str (), |
43942612 | 13401 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 13402 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 13403 | } |
3019eac3 | 13404 | return NULL; |
5fb290d7 DJ |
13405 | } |
13406 | ||
80626a55 DE |
13407 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
13408 | See lookup_dwo_cutu_unit for details. */ | |
13409 | ||
13410 | static struct dwo_unit * | |
13411 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
13412 | const char *dwo_name, const char *comp_dir, | |
13413 | ULONGEST signature) | |
13414 | { | |
13415 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
13416 | } | |
13417 | ||
13418 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
13419 | See lookup_dwo_cutu_unit for details. */ | |
13420 | ||
13421 | static struct dwo_unit * | |
13422 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
13423 | const char *dwo_name, const char *comp_dir) | |
13424 | { | |
13425 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
13426 | } | |
13427 | ||
89e63ee4 DE |
13428 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
13429 | ||
13430 | static int | |
13431 | queue_and_load_dwo_tu (void **slot, void *info) | |
13432 | { | |
13433 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
13434 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
13435 | ULONGEST signature = dwo_unit->signature; | |
13436 | struct signatured_type *sig_type = | |
13437 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
13438 | ||
13439 | if (sig_type != NULL) | |
13440 | { | |
13441 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
13442 | ||
13443 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
13444 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
13445 | while processing PER_CU. */ | |
13446 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
13447 | load_full_type_unit (sig_cu); | |
13448 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
13449 | } | |
13450 | ||
13451 | return 1; | |
13452 | } | |
13453 | ||
13454 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
13455 | The DWO may have the only definition of the type, though it may not be | |
13456 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
13457 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
13458 | ||
13459 | static void | |
13460 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
13461 | { | |
13462 | struct dwo_unit *dwo_unit; | |
13463 | struct dwo_file *dwo_file; | |
13464 | ||
13465 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 13466 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
13467 | gdb_assert (per_cu->cu != NULL); |
13468 | ||
13469 | dwo_unit = per_cu->cu->dwo_unit; | |
13470 | gdb_assert (dwo_unit != NULL); | |
13471 | ||
13472 | dwo_file = dwo_unit->dwo_file; | |
13473 | if (dwo_file->tus != NULL) | |
13474 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
13475 | } | |
13476 | ||
3019eac3 | 13477 | /* Read in various DIEs. */ |
348e048f | 13478 | |
d389af10 | 13479 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
13480 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
13481 | already referenced by DW_AT_abstract_origin from the children of the | |
13482 | current DIE. */ | |
d389af10 JK |
13483 | |
13484 | static void | |
13485 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
13486 | { | |
13487 | struct die_info *child_die; | |
791afaa2 | 13488 | sect_offset *offsetp; |
d389af10 JK |
13489 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
13490 | struct die_info *origin_die; | |
13491 | /* Iterator of the ORIGIN_DIE children. */ | |
13492 | struct die_info *origin_child_die; | |
d389af10 | 13493 | struct attribute *attr; |
cd02d79d PA |
13494 | struct dwarf2_cu *origin_cu; |
13495 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
13496 | |
13497 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13498 | if (!attr) | |
13499 | return; | |
13500 | ||
cd02d79d PA |
13501 | /* Note that following die references may follow to a die in a |
13502 | different cu. */ | |
13503 | ||
13504 | origin_cu = cu; | |
13505 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
13506 | ||
13507 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
13508 | symbols in. */ | |
13509 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
13510 | origin_cu->list_in_scope = cu->list_in_scope; | |
13511 | ||
edb3359d DJ |
13512 | if (die->tag != origin_die->tag |
13513 | && !(die->tag == DW_TAG_inlined_subroutine | |
13514 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13515 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
13516 | sect_offset_str (die->sect_off), |
13517 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 13518 | |
791afaa2 | 13519 | std::vector<sect_offset> offsets; |
d389af10 | 13520 | |
3ea89b92 PMR |
13521 | for (child_die = die->child; |
13522 | child_die && child_die->tag; | |
13523 | child_die = sibling_die (child_die)) | |
13524 | { | |
13525 | struct die_info *child_origin_die; | |
13526 | struct dwarf2_cu *child_origin_cu; | |
13527 | ||
13528 | /* We are trying to process concrete instance entries: | |
216f72a1 | 13529 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
13530 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
13531 | present in the abstract instance but not referenced in the concrete | |
13532 | one. */ | |
216f72a1 JK |
13533 | if (child_die->tag == DW_TAG_call_site |
13534 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
13535 | continue; |
13536 | ||
c38f313d DJ |
13537 | /* For each CHILD_DIE, find the corresponding child of |
13538 | ORIGIN_DIE. If there is more than one layer of | |
13539 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
13540 | but GCC versions at least through 4.4 generate this (GCC PR | |
13541 | 40573). */ | |
3ea89b92 PMR |
13542 | child_origin_die = child_die; |
13543 | child_origin_cu = cu; | |
c38f313d DJ |
13544 | while (1) |
13545 | { | |
cd02d79d PA |
13546 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
13547 | child_origin_cu); | |
c38f313d DJ |
13548 | if (attr == NULL) |
13549 | break; | |
cd02d79d PA |
13550 | child_origin_die = follow_die_ref (child_origin_die, attr, |
13551 | &child_origin_cu); | |
c38f313d DJ |
13552 | } |
13553 | ||
d389af10 JK |
13554 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
13555 | counterpart may exist. */ | |
c38f313d | 13556 | if (child_origin_die != child_die) |
d389af10 | 13557 | { |
edb3359d DJ |
13558 | if (child_die->tag != child_origin_die->tag |
13559 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
13560 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13561 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13562 | "different tags"), |
9d8780f0 SM |
13563 | sect_offset_str (child_die->sect_off), |
13564 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13565 | if (child_origin_die->parent != origin_die) |
b98664d3 | 13566 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13567 | "different parents"), |
9d8780f0 SM |
13568 | sect_offset_str (child_die->sect_off), |
13569 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13570 | else |
791afaa2 | 13571 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 13572 | } |
d389af10 | 13573 | } |
791afaa2 TT |
13574 | std::sort (offsets.begin (), offsets.end ()); |
13575 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
13576 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 13577 | if (offsetp[-1] == *offsetp) |
b98664d3 | 13578 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
13579 | "to DIE %s as their abstract origin"), |
13580 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 13581 | |
791afaa2 | 13582 | offsetp = offsets.data (); |
d389af10 JK |
13583 | origin_child_die = origin_die->child; |
13584 | while (origin_child_die && origin_child_die->tag) | |
13585 | { | |
13586 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 13587 | while (offsetp < offsets_end |
9c541725 | 13588 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 13589 | offsetp++; |
b64f50a1 | 13590 | if (offsetp >= offsets_end |
9c541725 | 13591 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 13592 | { |
adde2bff DE |
13593 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
13594 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
13595 | This can happen with mutually referenced abstract_origins. | |
13596 | PR 16581. */ | |
13597 | if (!origin_child_die->in_process) | |
13598 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
13599 | } |
13600 | origin_child_die = sibling_die (origin_child_die); | |
13601 | } | |
cd02d79d | 13602 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
13603 | } |
13604 | ||
c906108c | 13605 | static void |
e7c27a73 | 13606 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13607 | { |
518817b3 | 13608 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13609 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13610 | struct context_stack *newobj; |
c906108c SS |
13611 | CORE_ADDR lowpc; |
13612 | CORE_ADDR highpc; | |
13613 | struct die_info *child_die; | |
edb3359d | 13614 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 13615 | const char *name; |
e142c38c | 13616 | CORE_ADDR baseaddr; |
801e3a5b | 13617 | struct block *block; |
edb3359d | 13618 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 13619 | std::vector<struct symbol *> template_args; |
34eaf542 | 13620 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
13621 | |
13622 | if (inlined_func) | |
13623 | { | |
13624 | /* If we do not have call site information, we can't show the | |
13625 | caller of this inlined function. That's too confusing, so | |
13626 | only use the scope for local variables. */ | |
13627 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
13628 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
13629 | if (call_line == NULL || call_file == NULL) | |
13630 | { | |
13631 | read_lexical_block_scope (die, cu); | |
13632 | return; | |
13633 | } | |
13634 | } | |
c906108c | 13635 | |
e142c38c DJ |
13636 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
13637 | ||
94af9270 | 13638 | name = dwarf2_name (die, cu); |
c906108c | 13639 | |
e8d05480 JB |
13640 | /* Ignore functions with missing or empty names. These are actually |
13641 | illegal according to the DWARF standard. */ | |
13642 | if (name == NULL) | |
13643 | { | |
b98664d3 | 13644 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 13645 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
13646 | return; |
13647 | } | |
13648 | ||
13649 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 13650 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 13651 | <= PC_BOUNDS_INVALID) |
e8d05480 | 13652 | { |
ae4d0c03 PM |
13653 | attr = dwarf2_attr (die, DW_AT_external, cu); |
13654 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 13655 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
13656 | "for subprogram DIE at %s"), |
13657 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
13658 | return; |
13659 | } | |
c906108c | 13660 | |
3e29f34a MR |
13661 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13662 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13663 | |
34eaf542 TT |
13664 | /* If we have any template arguments, then we must allocate a |
13665 | different sort of symbol. */ | |
13666 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
13667 | { | |
13668 | if (child_die->tag == DW_TAG_template_type_param | |
13669 | || child_die->tag == DW_TAG_template_value_param) | |
13670 | { | |
e623cf5d | 13671 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 13672 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13673 | break; |
13674 | } | |
13675 | } | |
13676 | ||
c24bdb02 | 13677 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
13678 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13679 | (struct symbol *) templ_func); | |
4c2df51b | 13680 | |
81873cc8 TV |
13681 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
13682 | set_objfile_main_name (objfile, SYMBOL_LINKAGE_NAME (newobj->name), | |
13683 | cu->language); | |
13684 | ||
4cecd739 DJ |
13685 | /* If there is a location expression for DW_AT_frame_base, record |
13686 | it. */ | |
e142c38c | 13687 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 13688 | if (attr) |
fe978cb0 | 13689 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13690 | |
63e43d3a PMR |
13691 | /* If there is a location for the static link, record it. */ |
13692 | newobj->static_link = NULL; | |
13693 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
13694 | if (attr) | |
13695 | { | |
224c3ddb SM |
13696 | newobj->static_link |
13697 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d AB |
13698 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
13699 | dwarf2_per_cu_addr_type (cu->per_cu)); | |
63e43d3a PMR |
13700 | } |
13701 | ||
c24bdb02 | 13702 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13703 | |
639d11d3 | 13704 | if (die->child != NULL) |
c906108c | 13705 | { |
639d11d3 | 13706 | child_die = die->child; |
c906108c SS |
13707 | while (child_die && child_die->tag) |
13708 | { | |
34eaf542 TT |
13709 | if (child_die->tag == DW_TAG_template_type_param |
13710 | || child_die->tag == DW_TAG_template_value_param) | |
13711 | { | |
13712 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13713 | ||
f1078f66 | 13714 | if (arg != NULL) |
2f4732b0 | 13715 | template_args.push_back (arg); |
34eaf542 TT |
13716 | } |
13717 | else | |
13718 | process_die (child_die, cu); | |
c906108c SS |
13719 | child_die = sibling_die (child_die); |
13720 | } | |
13721 | } | |
13722 | ||
d389af10 JK |
13723 | inherit_abstract_dies (die, cu); |
13724 | ||
4a811a97 UW |
13725 | /* If we have a DW_AT_specification, we might need to import using |
13726 | directives from the context of the specification DIE. See the | |
13727 | comment in determine_prefix. */ | |
13728 | if (cu->language == language_cplus | |
13729 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13730 | { | |
13731 | struct dwarf2_cu *spec_cu = cu; | |
13732 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13733 | ||
13734 | while (spec_die) | |
13735 | { | |
13736 | child_die = spec_die->child; | |
13737 | while (child_die && child_die->tag) | |
13738 | { | |
13739 | if (child_die->tag == DW_TAG_imported_module) | |
13740 | process_die (child_die, spec_cu); | |
13741 | child_die = sibling_die (child_die); | |
13742 | } | |
13743 | ||
13744 | /* In some cases, GCC generates specification DIEs that | |
13745 | themselves contain DW_AT_specification attributes. */ | |
13746 | spec_die = die_specification (spec_die, &spec_cu); | |
13747 | } | |
13748 | } | |
13749 | ||
c24bdb02 | 13750 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13751 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13752 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13753 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13754 | |
df8a16a1 | 13755 | /* For C++, set the block's scope. */ |
45280282 IB |
13756 | if ((cu->language == language_cplus |
13757 | || cu->language == language_fortran | |
c44af4eb TT |
13758 | || cu->language == language_d |
13759 | || cu->language == language_rust) | |
4d4ec4e5 | 13760 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13761 | block_set_scope (block, determine_prefix (die, cu), |
13762 | &objfile->objfile_obstack); | |
df8a16a1 | 13763 | |
801e3a5b JB |
13764 | /* If we have address ranges, record them. */ |
13765 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13766 | |
a60f3166 | 13767 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13768 | |
34eaf542 | 13769 | /* Attach template arguments to function. */ |
2f4732b0 | 13770 | if (!template_args.empty ()) |
34eaf542 TT |
13771 | { |
13772 | gdb_assert (templ_func != NULL); | |
13773 | ||
2f4732b0 | 13774 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13775 | templ_func->template_arguments |
8d749320 SM |
13776 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13777 | templ_func->n_template_arguments); | |
34eaf542 | 13778 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13779 | template_args.data (), |
34eaf542 | 13780 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13781 | |
13782 | /* Make sure that the symtab is set on the new symbols. Even | |
13783 | though they don't appear in this symtab directly, other parts | |
13784 | of gdb assume that symbols do, and this is reasonably | |
13785 | true. */ | |
8634679f | 13786 | for (symbol *sym : template_args) |
3e1d3d8c | 13787 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13788 | } |
13789 | ||
208d8187 JB |
13790 | /* In C++, we can have functions nested inside functions (e.g., when |
13791 | a function declares a class that has methods). This means that | |
13792 | when we finish processing a function scope, we may need to go | |
13793 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13794 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13795 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13796 | |
921e78cf JB |
13797 | /* If we've finished processing a top-level function, subsequent |
13798 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13799 | if (cu->get_builder ()->outermost_context_p ()) |
13800 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13801 | } |
13802 | ||
13803 | /* Process all the DIES contained within a lexical block scope. Start | |
13804 | a new scope, process the dies, and then close the scope. */ | |
13805 | ||
13806 | static void | |
e7c27a73 | 13807 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13808 | { |
518817b3 | 13809 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13810 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13811 | CORE_ADDR lowpc, highpc; |
13812 | struct die_info *child_die; | |
e142c38c DJ |
13813 | CORE_ADDR baseaddr; |
13814 | ||
13815 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
13816 | |
13817 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13818 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13819 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13820 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13821 | describe ranges. */ |
e385593e JK |
13822 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13823 | { | |
13824 | case PC_BOUNDS_NOT_PRESENT: | |
13825 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13826 | there was no wrapping by that DW_TAG_lexical_block. | |
13827 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13828 | for (child_die = die->child; | |
13829 | child_die != NULL && child_die->tag; | |
13830 | child_die = sibling_die (child_die)) | |
13831 | process_die (child_die, cu); | |
13832 | return; | |
13833 | case PC_BOUNDS_INVALID: | |
13834 | return; | |
13835 | } | |
3e29f34a MR |
13836 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13837 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13838 | |
c24bdb02 | 13839 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13840 | if (die->child != NULL) |
c906108c | 13841 | { |
639d11d3 | 13842 | child_die = die->child; |
c906108c SS |
13843 | while (child_die && child_die->tag) |
13844 | { | |
e7c27a73 | 13845 | process_die (child_die, cu); |
c906108c SS |
13846 | child_die = sibling_die (child_die); |
13847 | } | |
13848 | } | |
3ea89b92 | 13849 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13850 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13851 | |
c24bdb02 KS |
13852 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13853 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13854 | { |
801e3a5b | 13855 | struct block *block |
c24bdb02 | 13856 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13857 | cstk.start_addr, highpc); |
801e3a5b JB |
13858 | |
13859 | /* Note that recording ranges after traversing children, as we | |
13860 | do here, means that recording a parent's ranges entails | |
13861 | walking across all its children's ranges as they appear in | |
13862 | the address map, which is quadratic behavior. | |
13863 | ||
13864 | It would be nicer to record the parent's ranges before | |
13865 | traversing its children, simply overriding whatever you find | |
13866 | there. But since we don't even decide whether to create a | |
13867 | block until after we've traversed its children, that's hard | |
13868 | to do. */ | |
13869 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13870 | } |
c24bdb02 KS |
13871 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13872 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13873 | } |
13874 | ||
216f72a1 | 13875 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13876 | |
13877 | static void | |
13878 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13879 | { | |
518817b3 | 13880 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13881 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13882 | CORE_ADDR pc, baseaddr; | |
13883 | struct attribute *attr; | |
13884 | struct call_site *call_site, call_site_local; | |
13885 | void **slot; | |
13886 | int nparams; | |
13887 | struct die_info *child_die; | |
13888 | ||
13889 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
13890 | ||
216f72a1 JK |
13891 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13892 | if (attr == NULL) | |
13893 | { | |
13894 | /* This was a pre-DWARF-5 GNU extension alias | |
13895 | for DW_AT_call_return_pc. */ | |
13896 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13897 | } | |
96408a79 SA |
13898 | if (!attr) |
13899 | { | |
b98664d3 | 13900 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13901 | "DIE %s [in module %s]"), |
13902 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13903 | return; |
13904 | } | |
31aa7e4e | 13905 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 13906 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13907 | |
13908 | if (cu->call_site_htab == NULL) | |
13909 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13910 | NULL, &objfile->objfile_obstack, | |
13911 | hashtab_obstack_allocate, NULL); | |
13912 | call_site_local.pc = pc; | |
13913 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13914 | if (*slot != NULL) | |
13915 | { | |
b98664d3 | 13916 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13917 | "DIE %s [in module %s]"), |
13918 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13919 | objfile_name (objfile)); |
96408a79 SA |
13920 | return; |
13921 | } | |
13922 | ||
13923 | /* Count parameters at the caller. */ | |
13924 | ||
13925 | nparams = 0; | |
13926 | for (child_die = die->child; child_die && child_die->tag; | |
13927 | child_die = sibling_die (child_die)) | |
13928 | { | |
216f72a1 JK |
13929 | if (child_die->tag != DW_TAG_call_site_parameter |
13930 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13931 | { |
b98664d3 | 13932 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13933 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13934 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13935 | objfile_name (objfile)); |
96408a79 SA |
13936 | continue; |
13937 | } | |
13938 | ||
13939 | nparams++; | |
13940 | } | |
13941 | ||
224c3ddb SM |
13942 | call_site |
13943 | = ((struct call_site *) | |
13944 | obstack_alloc (&objfile->objfile_obstack, | |
13945 | sizeof (*call_site) | |
13946 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13947 | *slot = call_site; |
13948 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13949 | call_site->pc = pc; | |
13950 | ||
216f72a1 JK |
13951 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13952 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13953 | { |
13954 | struct die_info *func_die; | |
13955 | ||
13956 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13957 | for (func_die = die->parent; | |
13958 | func_die && func_die->tag != DW_TAG_subprogram | |
13959 | && func_die->tag != DW_TAG_subroutine_type; | |
13960 | func_die = func_die->parent); | |
13961 | ||
216f72a1 JK |
13962 | /* DW_AT_call_all_calls is a superset |
13963 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13964 | if (func_die |
216f72a1 | 13965 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13966 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13967 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13968 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13969 | { | |
13970 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13971 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13972 | both the initial caller containing the real return address PC and | |
13973 | the final callee containing the current PC of a chain of tail | |
13974 | calls do not need to have the tail call list complete. But any | |
13975 | function candidate for a virtual tail call frame searched via | |
13976 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13977 | determined unambiguously. */ | |
13978 | } | |
13979 | else | |
13980 | { | |
13981 | struct type *func_type = NULL; | |
13982 | ||
13983 | if (func_die) | |
13984 | func_type = get_die_type (func_die, cu); | |
13985 | if (func_type != NULL) | |
13986 | { | |
13987 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
13988 | ||
13989 | /* Enlist this call site to the function. */ | |
13990 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13991 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13992 | } | |
13993 | else | |
b98664d3 | 13994 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13995 | "DIE %s [in module %s]"), |
13996 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13997 | } |
13998 | } | |
13999 | ||
216f72a1 JK |
14000 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
14001 | if (attr == NULL) | |
14002 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
14003 | if (attr == NULL) | |
14004 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 14005 | if (attr == NULL) |
216f72a1 JK |
14006 | { |
14007 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
14008 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14009 | } | |
96408a79 SA |
14010 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
14011 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
14012 | /* Keep NULL DWARF_BLOCK. */; | |
14013 | else if (attr_form_is_block (attr)) | |
14014 | { | |
14015 | struct dwarf2_locexpr_baton *dlbaton; | |
14016 | ||
8d749320 | 14017 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
14018 | dlbaton->data = DW_BLOCK (attr)->data; |
14019 | dlbaton->size = DW_BLOCK (attr)->size; | |
14020 | dlbaton->per_cu = cu->per_cu; | |
14021 | ||
14022 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
14023 | } | |
7771576e | 14024 | else if (attr_form_is_ref (attr)) |
96408a79 | 14025 | { |
96408a79 SA |
14026 | struct dwarf2_cu *target_cu = cu; |
14027 | struct die_info *target_die; | |
14028 | ||
ac9ec31b | 14029 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 14030 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
14031 | if (die_is_declaration (target_die, target_cu)) |
14032 | { | |
7d45c7c3 | 14033 | const char *target_physname; |
9112db09 JK |
14034 | |
14035 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 14036 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 14037 | if (target_physname == NULL) |
9112db09 | 14038 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 14039 | if (target_physname == NULL) |
b98664d3 | 14040 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14041 | "physname, for referencing DIE %s [in module %s]"), |
14042 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14043 | else |
7d455152 | 14044 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
14045 | } |
14046 | else | |
14047 | { | |
14048 | CORE_ADDR lowpc; | |
14049 | ||
14050 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 14051 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 14052 | <= PC_BOUNDS_INVALID) |
b98664d3 | 14053 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14054 | "low pc, for referencing DIE %s [in module %s]"), |
14055 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14056 | else |
3e29f34a MR |
14057 | { |
14058 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
14059 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
14060 | } | |
96408a79 SA |
14061 | } |
14062 | } | |
14063 | else | |
b98664d3 | 14064 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
14065 | "block nor reference, for DIE %s [in module %s]"), |
14066 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14067 | |
14068 | call_site->per_cu = cu->per_cu; | |
14069 | ||
14070 | for (child_die = die->child; | |
14071 | child_die && child_die->tag; | |
14072 | child_die = sibling_die (child_die)) | |
14073 | { | |
96408a79 | 14074 | struct call_site_parameter *parameter; |
1788b2d3 | 14075 | struct attribute *loc, *origin; |
96408a79 | 14076 | |
216f72a1 JK |
14077 | if (child_die->tag != DW_TAG_call_site_parameter |
14078 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
14079 | { |
14080 | /* Already printed the complaint above. */ | |
14081 | continue; | |
14082 | } | |
14083 | ||
14084 | gdb_assert (call_site->parameter_count < nparams); | |
14085 | parameter = &call_site->parameter[call_site->parameter_count]; | |
14086 | ||
1788b2d3 JK |
14087 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
14088 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 14089 | register is contained in DW_AT_call_value. */ |
96408a79 | 14090 | |
24c5c679 | 14091 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
14092 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
14093 | if (origin == NULL) | |
14094 | { | |
14095 | /* This was a pre-DWARF-5 GNU extension alias | |
14096 | for DW_AT_call_parameter. */ | |
14097 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
14098 | } | |
7771576e | 14099 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 14100 | { |
1788b2d3 | 14101 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
14102 | |
14103 | sect_offset sect_off | |
14104 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
14105 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
14106 | { |
14107 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
14108 | binding can be done only inside one CU. Such referenced DIE | |
14109 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 14110 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
14111 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14112 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14113 | objfile_name (objfile)); |
d76b7dbc JK |
14114 | continue; |
14115 | } | |
9c541725 PA |
14116 | parameter->u.param_cu_off |
14117 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
14118 | } |
14119 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 | 14120 | { |
b98664d3 | 14121 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
14122 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14123 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14124 | continue; |
14125 | } | |
24c5c679 | 14126 | else |
96408a79 | 14127 | { |
24c5c679 JK |
14128 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
14129 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
14130 | if (parameter->u.dwarf_reg != -1) | |
14131 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
14132 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
14133 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
14134 | ¶meter->u.fb_offset)) | |
14135 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
14136 | else | |
14137 | { | |
b98664d3 | 14138 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 14139 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 14140 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 14141 | "[in module %s]"), |
9d8780f0 | 14142 | sect_offset_str (child_die->sect_off), |
9c541725 | 14143 | objfile_name (objfile)); |
24c5c679 JK |
14144 | continue; |
14145 | } | |
96408a79 SA |
14146 | } |
14147 | ||
216f72a1 JK |
14148 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
14149 | if (attr == NULL) | |
14150 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
14151 | if (!attr_form_is_block (attr)) |
14152 | { | |
b98664d3 | 14153 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
14154 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14155 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14156 | objfile_name (objfile)); |
96408a79 SA |
14157 | continue; |
14158 | } | |
14159 | parameter->value = DW_BLOCK (attr)->data; | |
14160 | parameter->value_size = DW_BLOCK (attr)->size; | |
14161 | ||
14162 | /* Parameters are not pre-cleared by memset above. */ | |
14163 | parameter->data_value = NULL; | |
14164 | parameter->data_value_size = 0; | |
14165 | call_site->parameter_count++; | |
14166 | ||
216f72a1 JK |
14167 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
14168 | if (attr == NULL) | |
14169 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
14170 | if (attr) |
14171 | { | |
14172 | if (!attr_form_is_block (attr)) | |
b98664d3 | 14173 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
14174 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14175 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14176 | objfile_name (objfile)); |
96408a79 SA |
14177 | else |
14178 | { | |
14179 | parameter->data_value = DW_BLOCK (attr)->data; | |
14180 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
14181 | } | |
14182 | } | |
14183 | } | |
14184 | } | |
14185 | ||
71a3c369 TT |
14186 | /* Helper function for read_variable. If DIE represents a virtual |
14187 | table, then return the type of the concrete object that is | |
14188 | associated with the virtual table. Otherwise, return NULL. */ | |
14189 | ||
14190 | static struct type * | |
14191 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
14192 | { | |
14193 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
14194 | if (attr == NULL) | |
14195 | return NULL; | |
14196 | ||
14197 | /* Find the type DIE. */ | |
14198 | struct die_info *type_die = NULL; | |
14199 | struct dwarf2_cu *type_cu = cu; | |
14200 | ||
14201 | if (attr_form_is_ref (attr)) | |
14202 | type_die = follow_die_ref (die, attr, &type_cu); | |
14203 | if (type_die == NULL) | |
14204 | return NULL; | |
14205 | ||
14206 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
14207 | return NULL; | |
14208 | return die_containing_type (type_die, type_cu); | |
14209 | } | |
14210 | ||
14211 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
14212 | ||
14213 | static void | |
14214 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
14215 | { | |
14216 | struct rust_vtable_symbol *storage = NULL; | |
14217 | ||
14218 | if (cu->language == language_rust) | |
14219 | { | |
14220 | struct type *containing_type = rust_containing_type (die, cu); | |
14221 | ||
14222 | if (containing_type != NULL) | |
14223 | { | |
518817b3 | 14224 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 TT |
14225 | |
14226 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
14227 | struct rust_vtable_symbol); | |
14228 | initialize_objfile_symbol (storage); | |
14229 | storage->concrete_type = containing_type; | |
cf724bc9 | 14230 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
14231 | } |
14232 | } | |
14233 | ||
e4a62c65 TV |
14234 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
14235 | struct attribute *abstract_origin | |
14236 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14237 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
14238 | if (res == NULL && loc && abstract_origin) | |
14239 | { | |
14240 | /* We have a variable without a name, but with a location and an abstract | |
14241 | origin. This may be a concrete instance of an abstract variable | |
14242 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
14243 | later. */ | |
14244 | struct dwarf2_cu *origin_cu = cu; | |
14245 | struct die_info *origin_die | |
14246 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
14247 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 14248 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 14249 | } |
71a3c369 TT |
14250 | } |
14251 | ||
43988095 JK |
14252 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
14253 | reading .debug_rnglists. | |
14254 | Callback's type should be: | |
14255 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14256 | Return true if the attributes are present and valid, otherwise, | |
14257 | return false. */ | |
14258 | ||
14259 | template <typename Callback> | |
14260 | static bool | |
14261 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
14262 | Callback &&callback) | |
14263 | { | |
ed2dc618 | 14264 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14265 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14266 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 14267 | bfd *obfd = objfile->obfd; |
43988095 JK |
14268 | /* Base address selection entry. */ |
14269 | CORE_ADDR base; | |
14270 | int found_base; | |
43988095 | 14271 | const gdb_byte *buffer; |
43988095 JK |
14272 | CORE_ADDR baseaddr; |
14273 | bool overflow = false; | |
14274 | ||
14275 | found_base = cu->base_known; | |
14276 | base = cu->base_address; | |
14277 | ||
14278 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
14279 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
14280 | { | |
b98664d3 | 14281 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
14282 | offset); |
14283 | return false; | |
14284 | } | |
14285 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
14286 | ||
14287 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
14288 | ||
14289 | while (1) | |
14290 | { | |
7814882a JK |
14291 | /* Initialize it due to a false compiler warning. */ |
14292 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
14293 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
14294 | + dwarf2_per_objfile->rnglists.size); | |
14295 | unsigned int bytes_read; | |
14296 | ||
14297 | if (buffer == buf_end) | |
14298 | { | |
14299 | overflow = true; | |
14300 | break; | |
14301 | } | |
14302 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
14303 | switch (rlet) | |
14304 | { | |
14305 | case DW_RLE_end_of_list: | |
14306 | break; | |
14307 | case DW_RLE_base_address: | |
14308 | if (buffer + cu->header.addr_size > buf_end) | |
14309 | { | |
14310 | overflow = true; | |
14311 | break; | |
14312 | } | |
14313 | base = read_address (obfd, buffer, cu, &bytes_read); | |
14314 | found_base = 1; | |
14315 | buffer += bytes_read; | |
14316 | break; | |
14317 | case DW_RLE_start_length: | |
14318 | if (buffer + cu->header.addr_size > buf_end) | |
14319 | { | |
14320 | overflow = true; | |
14321 | break; | |
14322 | } | |
14323 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14324 | buffer += bytes_read; | |
14325 | range_end = (range_beginning | |
14326 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
14327 | buffer += bytes_read; | |
14328 | if (buffer > buf_end) | |
14329 | { | |
14330 | overflow = true; | |
14331 | break; | |
14332 | } | |
14333 | break; | |
14334 | case DW_RLE_offset_pair: | |
14335 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14336 | buffer += bytes_read; | |
14337 | if (buffer > buf_end) | |
14338 | { | |
14339 | overflow = true; | |
14340 | break; | |
14341 | } | |
14342 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14343 | buffer += bytes_read; | |
14344 | if (buffer > buf_end) | |
14345 | { | |
14346 | overflow = true; | |
14347 | break; | |
14348 | } | |
14349 | break; | |
14350 | case DW_RLE_start_end: | |
14351 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
14352 | { | |
14353 | overflow = true; | |
14354 | break; | |
14355 | } | |
14356 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14357 | buffer += bytes_read; | |
14358 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
14359 | buffer += bytes_read; | |
14360 | break; | |
14361 | default: | |
b98664d3 | 14362 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14363 | return false; |
14364 | } | |
14365 | if (rlet == DW_RLE_end_of_list || overflow) | |
14366 | break; | |
14367 | if (rlet == DW_RLE_base_address) | |
14368 | continue; | |
14369 | ||
14370 | if (!found_base) | |
14371 | { | |
14372 | /* We have no valid base address for the ranges | |
14373 | data. */ | |
b98664d3 | 14374 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14375 | return false; |
14376 | } | |
14377 | ||
14378 | if (range_beginning > range_end) | |
14379 | { | |
14380 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14381 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
14382 | return false; |
14383 | } | |
14384 | ||
14385 | /* Empty range entries have no effect. */ | |
14386 | if (range_beginning == range_end) | |
14387 | continue; | |
14388 | ||
14389 | range_beginning += base; | |
14390 | range_end += base; | |
14391 | ||
14392 | /* A not-uncommon case of bad debug info. | |
14393 | Don't pollute the addrmap with bad data. */ | |
14394 | if (range_beginning + baseaddr == 0 | |
14395 | && !dwarf2_per_objfile->has_section_at_zero) | |
14396 | { | |
b98664d3 | 14397 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
14398 | " [in module %s]"), objfile_name (objfile)); |
14399 | continue; | |
14400 | } | |
14401 | ||
14402 | callback (range_beginning, range_end); | |
14403 | } | |
14404 | ||
14405 | if (overflow) | |
14406 | { | |
b98664d3 | 14407 | complaint (_("Offset %d is not terminated " |
43988095 JK |
14408 | "for DW_AT_ranges attribute"), |
14409 | offset); | |
14410 | return false; | |
14411 | } | |
14412 | ||
14413 | return true; | |
14414 | } | |
14415 | ||
14416 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
14417 | Callback's type should be: | |
14418 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 14419 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 14420 | |
43988095 | 14421 | template <typename Callback> |
43039443 | 14422 | static int |
5f46c5a5 | 14423 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 14424 | Callback &&callback) |
43039443 | 14425 | { |
ed2dc618 | 14426 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14427 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14428 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
14429 | struct comp_unit_head *cu_header = &cu->header; |
14430 | bfd *obfd = objfile->obfd; | |
14431 | unsigned int addr_size = cu_header->addr_size; | |
14432 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14433 | /* Base address selection entry. */ | |
14434 | CORE_ADDR base; | |
14435 | int found_base; | |
14436 | unsigned int dummy; | |
d521ce57 | 14437 | const gdb_byte *buffer; |
ff013f42 | 14438 | CORE_ADDR baseaddr; |
43039443 | 14439 | |
43988095 JK |
14440 | if (cu_header->version >= 5) |
14441 | return dwarf2_rnglists_process (offset, cu, callback); | |
14442 | ||
d00adf39 DE |
14443 | found_base = cu->base_known; |
14444 | base = cu->base_address; | |
43039443 | 14445 | |
be391dca | 14446 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 14447 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 14448 | { |
b98664d3 | 14449 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
14450 | offset); |
14451 | return 0; | |
14452 | } | |
dce234bc | 14453 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 14454 | |
e7030f15 | 14455 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 14456 | |
43039443 JK |
14457 | while (1) |
14458 | { | |
14459 | CORE_ADDR range_beginning, range_end; | |
14460 | ||
14461 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
14462 | buffer += addr_size; | |
14463 | range_end = read_address (obfd, buffer, cu, &dummy); | |
14464 | buffer += addr_size; | |
14465 | offset += 2 * addr_size; | |
14466 | ||
14467 | /* An end of list marker is a pair of zero addresses. */ | |
14468 | if (range_beginning == 0 && range_end == 0) | |
14469 | /* Found the end of list entry. */ | |
14470 | break; | |
14471 | ||
14472 | /* Each base address selection entry is a pair of 2 values. | |
14473 | The first is the largest possible address, the second is | |
14474 | the base address. Check for a base address here. */ | |
14475 | if ((range_beginning & mask) == mask) | |
14476 | { | |
28d2bfb9 AB |
14477 | /* If we found the largest possible address, then we already |
14478 | have the base address in range_end. */ | |
14479 | base = range_end; | |
43039443 JK |
14480 | found_base = 1; |
14481 | continue; | |
14482 | } | |
14483 | ||
14484 | if (!found_base) | |
14485 | { | |
14486 | /* We have no valid base address for the ranges | |
14487 | data. */ | |
b98664d3 | 14488 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
14489 | return 0; |
14490 | } | |
14491 | ||
9277c30c UW |
14492 | if (range_beginning > range_end) |
14493 | { | |
14494 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14495 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
14496 | return 0; |
14497 | } | |
14498 | ||
14499 | /* Empty range entries have no effect. */ | |
14500 | if (range_beginning == range_end) | |
14501 | continue; | |
14502 | ||
43039443 JK |
14503 | range_beginning += base; |
14504 | range_end += base; | |
14505 | ||
01093045 DE |
14506 | /* A not-uncommon case of bad debug info. |
14507 | Don't pollute the addrmap with bad data. */ | |
14508 | if (range_beginning + baseaddr == 0 | |
14509 | && !dwarf2_per_objfile->has_section_at_zero) | |
14510 | { | |
b98664d3 | 14511 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 14512 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
14513 | continue; |
14514 | } | |
14515 | ||
5f46c5a5 JK |
14516 | callback (range_beginning, range_end); |
14517 | } | |
14518 | ||
14519 | return 1; | |
14520 | } | |
14521 | ||
14522 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
14523 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
14524 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
14525 | ||
14526 | static int | |
14527 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
14528 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
14529 | struct partial_symtab *ranges_pst) | |
14530 | { | |
518817b3 | 14531 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 JK |
14532 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
14533 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
14534 | SECT_OFF_TEXT (objfile)); | |
14535 | int low_set = 0; | |
14536 | CORE_ADDR low = 0; | |
14537 | CORE_ADDR high = 0; | |
14538 | int retval; | |
14539 | ||
14540 | retval = dwarf2_ranges_process (offset, cu, | |
14541 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14542 | { | |
9277c30c | 14543 | if (ranges_pst != NULL) |
3e29f34a MR |
14544 | { |
14545 | CORE_ADDR lowpc; | |
14546 | CORE_ADDR highpc; | |
14547 | ||
79748972 TT |
14548 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
14549 | range_beginning + baseaddr) | |
14550 | - baseaddr); | |
14551 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
14552 | range_end + baseaddr) | |
14553 | - baseaddr); | |
d320c2b5 TT |
14554 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
14555 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 14556 | } |
ff013f42 | 14557 | |
43039443 JK |
14558 | /* FIXME: This is recording everything as a low-high |
14559 | segment of consecutive addresses. We should have a | |
14560 | data structure for discontiguous block ranges | |
14561 | instead. */ | |
14562 | if (! low_set) | |
14563 | { | |
14564 | low = range_beginning; | |
14565 | high = range_end; | |
14566 | low_set = 1; | |
14567 | } | |
14568 | else | |
14569 | { | |
14570 | if (range_beginning < low) | |
14571 | low = range_beginning; | |
14572 | if (range_end > high) | |
14573 | high = range_end; | |
14574 | } | |
5f46c5a5 JK |
14575 | }); |
14576 | if (!retval) | |
14577 | return 0; | |
43039443 JK |
14578 | |
14579 | if (! low_set) | |
14580 | /* If the first entry is an end-of-list marker, the range | |
14581 | describes an empty scope, i.e. no instructions. */ | |
14582 | return 0; | |
14583 | ||
14584 | if (low_return) | |
14585 | *low_return = low; | |
14586 | if (high_return) | |
14587 | *high_return = high; | |
14588 | return 1; | |
14589 | } | |
14590 | ||
3a2b436a JK |
14591 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
14592 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 14593 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 14594 | |
3a2b436a | 14595 | static enum pc_bounds_kind |
af34e669 | 14596 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
14597 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
14598 | struct partial_symtab *pst) | |
c906108c | 14599 | { |
518817b3 SM |
14600 | struct dwarf2_per_objfile *dwarf2_per_objfile |
14601 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 14602 | struct attribute *attr; |
91da1414 | 14603 | struct attribute *attr_high; |
af34e669 DJ |
14604 | CORE_ADDR low = 0; |
14605 | CORE_ADDR high = 0; | |
e385593e | 14606 | enum pc_bounds_kind ret; |
c906108c | 14607 | |
91da1414 MW |
14608 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14609 | if (attr_high) | |
af34e669 | 14610 | { |
e142c38c | 14611 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 14612 | if (attr) |
91da1414 | 14613 | { |
31aa7e4e JB |
14614 | low = attr_value_as_address (attr); |
14615 | high = attr_value_as_address (attr_high); | |
14616 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14617 | high += low; | |
91da1414 | 14618 | } |
af34e669 DJ |
14619 | else |
14620 | /* Found high w/o low attribute. */ | |
e385593e | 14621 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14622 | |
14623 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14624 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14625 | } |
c906108c | 14626 | else |
af34e669 | 14627 | { |
e142c38c | 14628 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
14629 | if (attr != NULL) |
14630 | { | |
ab435259 DE |
14631 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14632 | We take advantage of the fact that DW_AT_ranges does not appear | |
14633 | in DW_TAG_compile_unit of DWO files. */ | |
14634 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
14635 | unsigned int ranges_offset = (DW_UNSND (attr) | |
14636 | + (need_ranges_base | |
14637 | ? cu->ranges_base | |
14638 | : 0)); | |
2e3cf129 | 14639 | |
af34e669 | 14640 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14641 | .debug_ranges section. */ |
2e3cf129 | 14642 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 14643 | return PC_BOUNDS_INVALID; |
43039443 | 14644 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14645 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14646 | } |
e385593e JK |
14647 | else |
14648 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14649 | } |
c906108c | 14650 | |
48fbe735 | 14651 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14652 | if (high <= low) |
e385593e | 14653 | return PC_BOUNDS_INVALID; |
c906108c SS |
14654 | |
14655 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14656 | eliminate duplicate copies of functions and vtables and such. | |
14657 | The linker will arbitrarily choose one and discard the others. | |
14658 | The AT_*_pc values for such functions refer to local labels in | |
14659 | these sections. If the section from that file was discarded, the | |
14660 | labels are not in the output, so the relocs get a value of 0. | |
14661 | If this is a discarded function, mark the pc bounds as invalid, | |
14662 | so that GDB will ignore it. */ | |
72dca2f5 | 14663 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 14664 | return PC_BOUNDS_INVALID; |
c906108c SS |
14665 | |
14666 | *lowpc = low; | |
96408a79 SA |
14667 | if (highpc) |
14668 | *highpc = high; | |
af34e669 | 14669 | return ret; |
c906108c SS |
14670 | } |
14671 | ||
b084d499 JB |
14672 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14673 | its low and high PC addresses. Do nothing if these addresses could not | |
14674 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14675 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14676 | ||
14677 | static void | |
14678 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
14679 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14680 | struct dwarf2_cu *cu) | |
14681 | { | |
14682 | CORE_ADDR low, high; | |
14683 | struct die_info *child = die->child; | |
14684 | ||
e385593e | 14685 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14686 | { |
325fac50 PA |
14687 | *lowpc = std::min (*lowpc, low); |
14688 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14689 | } |
14690 | ||
14691 | /* If the language does not allow nested subprograms (either inside | |
14692 | subprograms or lexical blocks), we're done. */ | |
14693 | if (cu->language != language_ada) | |
14694 | return; | |
6e70227d | 14695 | |
b084d499 JB |
14696 | /* Check all the children of the given DIE. If it contains nested |
14697 | subprograms, then check their pc bounds. Likewise, we need to | |
14698 | check lexical blocks as well, as they may also contain subprogram | |
14699 | definitions. */ | |
14700 | while (child && child->tag) | |
14701 | { | |
14702 | if (child->tag == DW_TAG_subprogram | |
14703 | || child->tag == DW_TAG_lexical_block) | |
14704 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
14705 | child = sibling_die (child); | |
14706 | } | |
14707 | } | |
14708 | ||
fae299cd DC |
14709 | /* Get the low and high pc's represented by the scope DIE, and store |
14710 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14711 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14712 | ||
14713 | static void | |
14714 | get_scope_pc_bounds (struct die_info *die, | |
14715 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14716 | struct dwarf2_cu *cu) | |
14717 | { | |
14718 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14719 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14720 | CORE_ADDR current_low, current_high; | |
14721 | ||
3a2b436a | 14722 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14723 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14724 | { |
14725 | best_low = current_low; | |
14726 | best_high = current_high; | |
14727 | } | |
14728 | else | |
14729 | { | |
14730 | struct die_info *child = die->child; | |
14731 | ||
14732 | while (child && child->tag) | |
14733 | { | |
14734 | switch (child->tag) { | |
14735 | case DW_TAG_subprogram: | |
b084d499 | 14736 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14737 | break; |
14738 | case DW_TAG_namespace: | |
f55ee35c | 14739 | case DW_TAG_module: |
fae299cd DC |
14740 | /* FIXME: carlton/2004-01-16: Should we do this for |
14741 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14742 | that current GCC's always emit the DIEs corresponding | |
14743 | to definitions of methods of classes as children of a | |
14744 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14745 | the DIEs giving the declarations, which could be | |
14746 | anywhere). But I don't see any reason why the | |
14747 | standards says that they have to be there. */ | |
14748 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14749 | ||
14750 | if (current_low != ((CORE_ADDR) -1)) | |
14751 | { | |
325fac50 PA |
14752 | best_low = std::min (best_low, current_low); |
14753 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14754 | } |
14755 | break; | |
14756 | default: | |
0963b4bd | 14757 | /* Ignore. */ |
fae299cd DC |
14758 | break; |
14759 | } | |
14760 | ||
14761 | child = sibling_die (child); | |
14762 | } | |
14763 | } | |
14764 | ||
14765 | *lowpc = best_low; | |
14766 | *highpc = best_high; | |
14767 | } | |
14768 | ||
801e3a5b JB |
14769 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14770 | in DIE. */ | |
380bca97 | 14771 | |
801e3a5b JB |
14772 | static void |
14773 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14774 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14775 | { | |
518817b3 | 14776 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14777 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14778 | struct attribute *attr; |
91da1414 | 14779 | struct attribute *attr_high; |
801e3a5b | 14780 | |
91da1414 MW |
14781 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14782 | if (attr_high) | |
801e3a5b | 14783 | { |
801e3a5b JB |
14784 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
14785 | if (attr) | |
14786 | { | |
31aa7e4e JB |
14787 | CORE_ADDR low = attr_value_as_address (attr); |
14788 | CORE_ADDR high = attr_value_as_address (attr_high); | |
14789 | ||
14790 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14791 | high += low; | |
9a619af0 | 14792 | |
3e29f34a MR |
14793 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14794 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14795 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14796 | } |
14797 | } | |
14798 | ||
14799 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
14800 | if (attr) | |
14801 | { | |
ab435259 DE |
14802 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14803 | We take advantage of the fact that DW_AT_ranges does not appear | |
14804 | in DW_TAG_compile_unit of DWO files. */ | |
14805 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14806 | |
14807 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14808 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14809 | unsigned long offset = (DW_UNSND (attr) |
14810 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14811 | |
2d5f09ec | 14812 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14813 | dwarf2_ranges_process (offset, cu, |
14814 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14815 | { | |
58fdfd2c JK |
14816 | start += baseaddr; |
14817 | end += baseaddr; | |
5f46c5a5 JK |
14818 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14819 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14820 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14821 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14822 | }); |
2d5f09ec KB |
14823 | |
14824 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14825 | } |
14826 | } | |
14827 | ||
685b1105 JK |
14828 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14829 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14830 | |
685b1105 JK |
14831 | static void |
14832 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14833 | { |
38360086 | 14834 | int major, minor; |
60d5a603 JK |
14835 | |
14836 | if (cu->producer == NULL) | |
14837 | { | |
14838 | /* For unknown compilers expect their behavior is DWARF version | |
14839 | compliant. | |
14840 | ||
14841 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14842 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14843 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14844 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14845 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14846 | } |
b1ffba5a | 14847 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14848 | { |
38360086 MW |
14849 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14850 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14851 | } |
5230b05a | 14852 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14853 | { |
14854 | cu->producer_is_icc = true; | |
14855 | cu->producer_is_icc_lt_14 = major < 14; | |
14856 | } | |
c258c396 JD |
14857 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14858 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14859 | else |
14860 | { | |
14861 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14862 | compliant. */ | |
60d5a603 JK |
14863 | } |
14864 | ||
9068261f | 14865 | cu->checked_producer = true; |
685b1105 | 14866 | } |
ba919b58 | 14867 | |
685b1105 JK |
14868 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14869 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14870 | during 4.6.0 experimental. */ | |
14871 | ||
9068261f | 14872 | static bool |
685b1105 JK |
14873 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14874 | { | |
14875 | if (!cu->checked_producer) | |
14876 | check_producer (cu); | |
14877 | ||
14878 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14879 | } |
14880 | ||
c258c396 JD |
14881 | |
14882 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14883 | with incorrect is_stmt attributes. */ | |
14884 | ||
14885 | static bool | |
14886 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14887 | { | |
14888 | if (!cu->checked_producer) | |
14889 | check_producer (cu); | |
14890 | ||
14891 | return cu->producer_is_codewarrior; | |
14892 | } | |
14893 | ||
60d5a603 JK |
14894 | /* Return the default accessibility type if it is not overriden by |
14895 | DW_AT_accessibility. */ | |
14896 | ||
14897 | static enum dwarf_access_attribute | |
14898 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14899 | { | |
14900 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14901 | { | |
14902 | /* The default DWARF 2 accessibility for members is public, the default | |
14903 | accessibility for inheritance is private. */ | |
14904 | ||
14905 | if (die->tag != DW_TAG_inheritance) | |
14906 | return DW_ACCESS_public; | |
14907 | else | |
14908 | return DW_ACCESS_private; | |
14909 | } | |
14910 | else | |
14911 | { | |
14912 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14913 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14914 | depends on the container kind. */ | |
14915 | ||
14916 | if (die->parent->tag == DW_TAG_class_type) | |
14917 | return DW_ACCESS_private; | |
14918 | else | |
14919 | return DW_ACCESS_public; | |
14920 | } | |
14921 | } | |
14922 | ||
74ac6d43 TT |
14923 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14924 | offset. If the attribute was not found return 0, otherwise return | |
14925 | 1. If it was found but could not properly be handled, set *OFFSET | |
14926 | to 0. */ | |
14927 | ||
14928 | static int | |
14929 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14930 | LONGEST *offset) | |
14931 | { | |
14932 | struct attribute *attr; | |
14933 | ||
14934 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14935 | if (attr != NULL) | |
14936 | { | |
14937 | *offset = 0; | |
14938 | ||
14939 | /* Note that we do not check for a section offset first here. | |
14940 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14941 | so if we see it, we can assume that a constant form is really | |
14942 | a constant and not a section offset. */ | |
14943 | if (attr_form_is_constant (attr)) | |
14944 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
14945 | else if (attr_form_is_section_offset (attr)) | |
14946 | dwarf2_complex_location_expr_complaint (); | |
14947 | else if (attr_form_is_block (attr)) | |
14948 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
14949 | else | |
14950 | dwarf2_complex_location_expr_complaint (); | |
14951 | ||
14952 | return 1; | |
14953 | } | |
14954 | ||
14955 | return 0; | |
14956 | } | |
14957 | ||
c906108c SS |
14958 | /* Add an aggregate field to the field list. */ |
14959 | ||
14960 | static void | |
107d2387 | 14961 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14962 | struct dwarf2_cu *cu) |
6e70227d | 14963 | { |
518817b3 | 14964 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 14965 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14966 | struct nextfield *new_field; |
14967 | struct attribute *attr; | |
14968 | struct field *fp; | |
15d034d0 | 14969 | const char *fieldname = ""; |
c906108c | 14970 | |
7d0ccb61 DJ |
14971 | if (die->tag == DW_TAG_inheritance) |
14972 | { | |
be2daae6 TT |
14973 | fip->baseclasses.emplace_back (); |
14974 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14975 | } |
14976 | else | |
14977 | { | |
be2daae6 TT |
14978 | fip->fields.emplace_back (); |
14979 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14980 | } |
be2daae6 | 14981 | |
c906108c SS |
14982 | fip->nfields++; |
14983 | ||
e142c38c | 14984 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
14985 | if (attr) |
14986 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
14987 | else |
14988 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14989 | if (new_field->accessibility != DW_ACCESS_public) |
14990 | fip->non_public_fields = 1; | |
60d5a603 | 14991 | |
e142c38c | 14992 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
14993 | if (attr) |
14994 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
14995 | else |
14996 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14997 | |
14998 | fp = &new_field->field; | |
a9a9bd0f | 14999 | |
e142c38c | 15000 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 15001 | { |
74ac6d43 TT |
15002 | LONGEST offset; |
15003 | ||
a9a9bd0f | 15004 | /* Data member other than a C++ static data member. */ |
6e70227d | 15005 | |
c906108c | 15006 | /* Get type of field. */ |
e7c27a73 | 15007 | fp->type = die_type (die, cu); |
c906108c | 15008 | |
d6a843b5 | 15009 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 15010 | |
c906108c | 15011 | /* Get bit size of field (zero if none). */ |
e142c38c | 15012 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
15013 | if (attr) |
15014 | { | |
15015 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
15016 | } | |
15017 | else | |
15018 | { | |
15019 | FIELD_BITSIZE (*fp) = 0; | |
15020 | } | |
15021 | ||
15022 | /* Get bit offset of field. */ | |
74ac6d43 TT |
15023 | if (handle_data_member_location (die, cu, &offset)) |
15024 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 15025 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
15026 | if (attr) |
15027 | { | |
5e2b427d | 15028 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
15029 | { |
15030 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
15031 | additional bit offset from the MSB of the containing |
15032 | anonymous object to the MSB of the field. We don't | |
15033 | have to do anything special since we don't need to | |
15034 | know the size of the anonymous object. */ | |
f41f5e61 | 15035 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
15036 | } |
15037 | else | |
15038 | { | |
15039 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
15040 | MSB of the anonymous object, subtract off the number of |
15041 | bits from the MSB of the field to the MSB of the | |
15042 | object, and then subtract off the number of bits of | |
15043 | the field itself. The result is the bit offset of | |
15044 | the LSB of the field. */ | |
c906108c SS |
15045 | int anonymous_size; |
15046 | int bit_offset = DW_UNSND (attr); | |
15047 | ||
e142c38c | 15048 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15049 | if (attr) |
15050 | { | |
15051 | /* The size of the anonymous object containing | |
15052 | the bit field is explicit, so use the | |
15053 | indicated size (in bytes). */ | |
15054 | anonymous_size = DW_UNSND (attr); | |
15055 | } | |
15056 | else | |
15057 | { | |
15058 | /* The size of the anonymous object containing | |
15059 | the bit field must be inferred from the type | |
15060 | attribute of the data member containing the | |
15061 | bit field. */ | |
15062 | anonymous_size = TYPE_LENGTH (fp->type); | |
15063 | } | |
f41f5e61 PA |
15064 | SET_FIELD_BITPOS (*fp, |
15065 | (FIELD_BITPOS (*fp) | |
15066 | + anonymous_size * bits_per_byte | |
15067 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
15068 | } |
15069 | } | |
da5b30da AA |
15070 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
15071 | if (attr != NULL) | |
15072 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
15073 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
15074 | |
15075 | /* Get name of field. */ | |
39cbfefa DJ |
15076 | fieldname = dwarf2_name (die, cu); |
15077 | if (fieldname == NULL) | |
15078 | fieldname = ""; | |
d8151005 DJ |
15079 | |
15080 | /* The name is already allocated along with this objfile, so we don't | |
15081 | need to duplicate it for the type. */ | |
15082 | fp->name = fieldname; | |
c906108c SS |
15083 | |
15084 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 15085 | pointer or virtual base class pointer) to private. */ |
e142c38c | 15086 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 15087 | { |
d48cc9dd | 15088 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
15089 | new_field->accessibility = DW_ACCESS_private; |
15090 | fip->non_public_fields = 1; | |
15091 | } | |
15092 | } | |
a9a9bd0f | 15093 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 15094 | { |
a9a9bd0f DC |
15095 | /* C++ static member. */ |
15096 | ||
15097 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
15098 | is a declaration, but all versions of G++ as of this writing | |
15099 | (so through at least 3.2.1) incorrectly generate | |
15100 | DW_TAG_variable tags. */ | |
6e70227d | 15101 | |
ff355380 | 15102 | const char *physname; |
c906108c | 15103 | |
a9a9bd0f | 15104 | /* Get name of field. */ |
39cbfefa DJ |
15105 | fieldname = dwarf2_name (die, cu); |
15106 | if (fieldname == NULL) | |
c906108c SS |
15107 | return; |
15108 | ||
254e6b9e | 15109 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
15110 | if (attr |
15111 | /* Only create a symbol if this is an external value. | |
15112 | new_symbol checks this and puts the value in the global symbol | |
15113 | table, which we want. If it is not external, new_symbol | |
15114 | will try to put the value in cu->list_in_scope which is wrong. */ | |
15115 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
15116 | { |
15117 | /* A static const member, not much different than an enum as far as | |
15118 | we're concerned, except that we can support more types. */ | |
15119 | new_symbol (die, NULL, cu); | |
15120 | } | |
15121 | ||
2df3850c | 15122 | /* Get physical name. */ |
ff355380 | 15123 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 15124 | |
d8151005 DJ |
15125 | /* The name is already allocated along with this objfile, so we don't |
15126 | need to duplicate it for the type. */ | |
15127 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 15128 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 15129 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
15130 | } |
15131 | else if (die->tag == DW_TAG_inheritance) | |
15132 | { | |
74ac6d43 | 15133 | LONGEST offset; |
d4b96c9a | 15134 | |
74ac6d43 TT |
15135 | /* C++ base class field. */ |
15136 | if (handle_data_member_location (die, cu, &offset)) | |
15137 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 15138 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 15139 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 15140 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 15141 | } |
2ddeaf8a TT |
15142 | else if (die->tag == DW_TAG_variant_part) |
15143 | { | |
15144 | /* process_structure_scope will treat this DIE as a union. */ | |
15145 | process_structure_scope (die, cu); | |
15146 | ||
15147 | /* The variant part is relative to the start of the enclosing | |
15148 | structure. */ | |
15149 | SET_FIELD_BITPOS (*fp, 0); | |
15150 | fp->type = get_die_type (die, cu); | |
15151 | fp->artificial = 1; | |
15152 | fp->name = "<<variant>>"; | |
c8c81635 TT |
15153 | |
15154 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
15155 | representation requires one, so set it to the maximum of the | |
15156 | child sizes. */ | |
15157 | if (TYPE_LENGTH (fp->type) == 0) | |
15158 | { | |
15159 | unsigned max = 0; | |
15160 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
15161 | if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i)) > max) | |
15162 | max = TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i)); | |
15163 | TYPE_LENGTH (fp->type) = max; | |
15164 | } | |
2ddeaf8a TT |
15165 | } |
15166 | else | |
15167 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
15168 | } |
15169 | ||
883fd55a KS |
15170 | /* Can the type given by DIE define another type? */ |
15171 | ||
15172 | static bool | |
15173 | type_can_define_types (const struct die_info *die) | |
15174 | { | |
15175 | switch (die->tag) | |
15176 | { | |
15177 | case DW_TAG_typedef: | |
15178 | case DW_TAG_class_type: | |
15179 | case DW_TAG_structure_type: | |
15180 | case DW_TAG_union_type: | |
15181 | case DW_TAG_enumeration_type: | |
15182 | return true; | |
15183 | ||
15184 | default: | |
15185 | return false; | |
15186 | } | |
15187 | } | |
15188 | ||
15189 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
15190 | |
15191 | static void | |
883fd55a KS |
15192 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
15193 | struct dwarf2_cu *cu) | |
6e70227d | 15194 | { |
be2daae6 TT |
15195 | struct decl_field fp; |
15196 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 15197 | |
883fd55a | 15198 | gdb_assert (type_can_define_types (die)); |
98751a41 | 15199 | |
883fd55a | 15200 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
15201 | fp.name = dwarf2_name (die, cu); |
15202 | fp.type = read_type_die (die, cu); | |
98751a41 | 15203 | |
c191a687 KS |
15204 | /* Save accessibility. */ |
15205 | enum dwarf_access_attribute accessibility; | |
15206 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
15207 | if (attr != NULL) | |
15208 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
15209 | else | |
15210 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15211 | switch (accessibility) | |
15212 | { | |
15213 | case DW_ACCESS_public: | |
15214 | /* The assumed value if neither private nor protected. */ | |
15215 | break; | |
15216 | case DW_ACCESS_private: | |
be2daae6 | 15217 | fp.is_private = 1; |
c191a687 KS |
15218 | break; |
15219 | case DW_ACCESS_protected: | |
be2daae6 | 15220 | fp.is_protected = 1; |
c191a687 KS |
15221 | break; |
15222 | default: | |
b98664d3 | 15223 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
15224 | } |
15225 | ||
883fd55a | 15226 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 15227 | fip->typedef_field_list.push_back (fp); |
883fd55a | 15228 | else |
be2daae6 | 15229 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
15230 | } |
15231 | ||
c906108c SS |
15232 | /* Create the vector of fields, and attach it to the type. */ |
15233 | ||
15234 | static void | |
fba45db2 | 15235 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15236 | struct dwarf2_cu *cu) |
c906108c SS |
15237 | { |
15238 | int nfields = fip->nfields; | |
15239 | ||
15240 | /* Record the field count, allocate space for the array of fields, | |
15241 | and create blank accessibility bitfields if necessary. */ | |
15242 | TYPE_NFIELDS (type) = nfields; | |
15243 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 15244 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 15245 | |
b4ba55a1 | 15246 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
15247 | { |
15248 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15249 | ||
15250 | TYPE_FIELD_PRIVATE_BITS (type) = | |
15251 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15252 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
15253 | ||
15254 | TYPE_FIELD_PROTECTED_BITS (type) = | |
15255 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15256 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
15257 | ||
774b6a14 TT |
15258 | TYPE_FIELD_IGNORE_BITS (type) = |
15259 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15260 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
15261 | } |
15262 | ||
15263 | /* If the type has baseclasses, allocate and clear a bit vector for | |
15264 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 15265 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 15266 | { |
be2daae6 | 15267 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 15268 | unsigned char *pointer; |
c906108c SS |
15269 | |
15270 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 15271 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 15272 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
15273 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
15274 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
15275 | } |
15276 | ||
2ddeaf8a TT |
15277 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
15278 | { | |
15279 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
15280 | ||
be2daae6 | 15281 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 15282 | { |
be2daae6 TT |
15283 | struct nextfield &field = fip->fields[index]; |
15284 | ||
15285 | if (field.variant.is_discriminant) | |
2ddeaf8a | 15286 | di->discriminant_index = index; |
be2daae6 | 15287 | else if (field.variant.default_branch) |
2ddeaf8a TT |
15288 | di->default_index = index; |
15289 | else | |
be2daae6 | 15290 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
15291 | } |
15292 | } | |
15293 | ||
be2daae6 TT |
15294 | /* Copy the saved-up fields into the field vector. */ |
15295 | for (int i = 0; i < nfields; ++i) | |
c906108c | 15296 | { |
be2daae6 TT |
15297 | struct nextfield &field |
15298 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
15299 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 15300 | |
be2daae6 TT |
15301 | TYPE_FIELD (type, i) = field.field; |
15302 | switch (field.accessibility) | |
c906108c | 15303 | { |
c5aa993b | 15304 | case DW_ACCESS_private: |
b4ba55a1 | 15305 | if (cu->language != language_ada) |
be2daae6 | 15306 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 15307 | break; |
c906108c | 15308 | |
c5aa993b | 15309 | case DW_ACCESS_protected: |
b4ba55a1 | 15310 | if (cu->language != language_ada) |
be2daae6 | 15311 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 15312 | break; |
c906108c | 15313 | |
c5aa993b JM |
15314 | case DW_ACCESS_public: |
15315 | break; | |
c906108c | 15316 | |
c5aa993b JM |
15317 | default: |
15318 | /* Unknown accessibility. Complain and treat it as public. */ | |
15319 | { | |
b98664d3 | 15320 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 15321 | field.accessibility); |
c5aa993b JM |
15322 | } |
15323 | break; | |
c906108c | 15324 | } |
be2daae6 | 15325 | if (i < fip->baseclasses.size ()) |
c906108c | 15326 | { |
be2daae6 | 15327 | switch (field.virtuality) |
c906108c | 15328 | { |
c5aa993b JM |
15329 | case DW_VIRTUALITY_virtual: |
15330 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 15331 | if (cu->language == language_ada) |
a73c6dcd | 15332 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 15333 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 15334 | break; |
c906108c SS |
15335 | } |
15336 | } | |
c906108c SS |
15337 | } |
15338 | } | |
15339 | ||
7d27a96d TT |
15340 | /* Return true if this member function is a constructor, false |
15341 | otherwise. */ | |
15342 | ||
15343 | static int | |
15344 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
15345 | { | |
15346 | const char *fieldname; | |
fe978cb0 | 15347 | const char *type_name; |
7d27a96d TT |
15348 | int len; |
15349 | ||
15350 | if (die->parent == NULL) | |
15351 | return 0; | |
15352 | ||
15353 | if (die->parent->tag != DW_TAG_structure_type | |
15354 | && die->parent->tag != DW_TAG_union_type | |
15355 | && die->parent->tag != DW_TAG_class_type) | |
15356 | return 0; | |
15357 | ||
15358 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
15359 | type_name = dwarf2_name (die->parent, cu); |
15360 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
15361 | return 0; |
15362 | ||
15363 | len = strlen (fieldname); | |
fe978cb0 PA |
15364 | return (strncmp (fieldname, type_name, len) == 0 |
15365 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
15366 | } |
15367 | ||
c906108c SS |
15368 | /* Add a member function to the proper fieldlist. */ |
15369 | ||
15370 | static void | |
107d2387 | 15371 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15372 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 15373 | { |
518817b3 | 15374 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15375 | struct attribute *attr; |
c906108c | 15376 | int i; |
be2daae6 | 15377 | struct fnfieldlist *flp = nullptr; |
c906108c | 15378 | struct fn_field *fnp; |
15d034d0 | 15379 | const char *fieldname; |
f792889a | 15380 | struct type *this_type; |
60d5a603 | 15381 | enum dwarf_access_attribute accessibility; |
c906108c | 15382 | |
b4ba55a1 | 15383 | if (cu->language == language_ada) |
a73c6dcd | 15384 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 15385 | |
2df3850c | 15386 | /* Get name of member function. */ |
39cbfefa DJ |
15387 | fieldname = dwarf2_name (die, cu); |
15388 | if (fieldname == NULL) | |
2df3850c | 15389 | return; |
c906108c | 15390 | |
c906108c | 15391 | /* Look up member function name in fieldlist. */ |
be2daae6 | 15392 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15393 | { |
27bfe10e | 15394 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
15395 | { |
15396 | flp = &fip->fnfieldlists[i]; | |
15397 | break; | |
15398 | } | |
c906108c SS |
15399 | } |
15400 | ||
be2daae6 TT |
15401 | /* Create a new fnfieldlist if necessary. */ |
15402 | if (flp == nullptr) | |
c906108c | 15403 | { |
be2daae6 TT |
15404 | fip->fnfieldlists.emplace_back (); |
15405 | flp = &fip->fnfieldlists.back (); | |
c906108c | 15406 | flp->name = fieldname; |
be2daae6 | 15407 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
15408 | } |
15409 | ||
be2daae6 TT |
15410 | /* Create a new member function field and add it to the vector of |
15411 | fnfieldlists. */ | |
15412 | flp->fnfields.emplace_back (); | |
15413 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
15414 | |
15415 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 15416 | if (cu->language == language_cplus) |
be2daae6 TT |
15417 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
15418 | die, cu); | |
3da10d80 KS |
15419 | else |
15420 | { | |
1d06ead6 | 15421 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15422 | fnp->physname = physname ? physname : ""; |
15423 | } | |
15424 | ||
c906108c | 15425 | fnp->type = alloc_type (objfile); |
f792889a DJ |
15426 | this_type = read_type_die (die, cu); |
15427 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 15428 | { |
f792889a | 15429 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 15430 | |
f792889a | 15431 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15432 | of the method itself (TYPE_CODE_METHOD). */ |
15433 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
15434 | TYPE_TARGET_TYPE (this_type), |
15435 | TYPE_FIELDS (this_type), | |
15436 | TYPE_NFIELDS (this_type), | |
15437 | TYPE_VARARGS (this_type)); | |
c906108c SS |
15438 | |
15439 | /* Handle static member functions. | |
c5aa993b | 15440 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
15441 | member functions. G++ helps GDB by marking the first |
15442 | parameter for non-static member functions (which is the this | |
15443 | pointer) as artificial. We obtain this information from | |
15444 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15445 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15446 | fnp->voffset = VOFFSET_STATIC; |
15447 | } | |
15448 | else | |
b98664d3 | 15449 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15450 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15451 | |
15452 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15453 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15454 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15455 | |
3e43a32a MS |
15456 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15457 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15458 | |
15459 | /* Get accessibility. */ | |
e142c38c | 15460 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 15461 | if (attr) |
aead7601 | 15462 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
15463 | else |
15464 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15465 | switch (accessibility) | |
c906108c | 15466 | { |
60d5a603 JK |
15467 | case DW_ACCESS_private: |
15468 | fnp->is_private = 1; | |
15469 | break; | |
15470 | case DW_ACCESS_protected: | |
15471 | fnp->is_protected = 1; | |
15472 | break; | |
c906108c SS |
15473 | } |
15474 | ||
b02dede2 | 15475 | /* Check for artificial methods. */ |
e142c38c | 15476 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15477 | if (attr && DW_UNSND (attr) != 0) |
15478 | fnp->is_artificial = 1; | |
15479 | ||
7d27a96d TT |
15480 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15481 | ||
0d564a31 | 15482 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15483 | function. For older versions of GCC, this is an offset in the |
15484 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15485 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15486 | to the object address. */ |
15487 | ||
e142c38c | 15488 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 15489 | if (attr) |
8e19ed76 | 15490 | { |
aec5aa8b | 15491 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15492 | { |
aec5aa8b TT |
15493 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15494 | { | |
15495 | /* Old-style GCC. */ | |
15496 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15497 | } | |
15498 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15499 | || (DW_BLOCK (attr)->size > 1 | |
15500 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15501 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15502 | { | |
aec5aa8b TT |
15503 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15504 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15505 | dwarf2_complex_location_expr_complaint (); | |
15506 | else | |
15507 | fnp->voffset /= cu->header.addr_size; | |
15508 | fnp->voffset += 2; | |
15509 | } | |
15510 | else | |
15511 | dwarf2_complex_location_expr_complaint (); | |
15512 | ||
15513 | if (!fnp->fcontext) | |
7e993ebf KS |
15514 | { |
15515 | /* If there is no `this' field and no DW_AT_containing_type, | |
15516 | we cannot actually find a base class context for the | |
15517 | vtable! */ | |
15518 | if (TYPE_NFIELDS (this_type) == 0 | |
15519 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15520 | { | |
b98664d3 | 15521 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15522 | "function \"%s\" (offset %s)"), |
15523 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15524 | } |
15525 | else | |
15526 | { | |
15527 | fnp->fcontext | |
15528 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15529 | } | |
15530 | } | |
aec5aa8b | 15531 | } |
3690dd37 | 15532 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 15533 | { |
4d3c2250 | 15534 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15535 | } |
15536 | else | |
15537 | { | |
4d3c2250 KB |
15538 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15539 | fieldname); | |
8e19ed76 | 15540 | } |
0d564a31 | 15541 | } |
d48cc9dd DJ |
15542 | else |
15543 | { | |
15544 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15545 | if (attr && DW_UNSND (attr)) | |
15546 | { | |
15547 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15548 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15549 | "but the vtable offset is not specified"), |
9d8780f0 | 15550 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15551 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15552 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15553 | } | |
15554 | } | |
c906108c SS |
15555 | } |
15556 | ||
15557 | /* Create the vector of member function fields, and attach it to the type. */ | |
15558 | ||
15559 | static void | |
fba45db2 | 15560 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15561 | struct dwarf2_cu *cu) |
c906108c | 15562 | { |
b4ba55a1 | 15563 | if (cu->language == language_ada) |
a73c6dcd | 15564 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15565 | |
c906108c SS |
15566 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15567 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15568 | TYPE_ALLOC (type, |
15569 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15570 | |
be2daae6 | 15571 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15572 | { |
be2daae6 | 15573 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15574 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15575 | |
be2daae6 TT |
15576 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15577 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15578 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15579 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15580 | ||
15581 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15582 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15583 | } |
15584 | ||
be2daae6 | 15585 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15586 | } |
15587 | ||
1168df01 JB |
15588 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15589 | language, zero otherwise. */ | |
15590 | static int | |
15591 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15592 | { | |
15593 | static const char vptr[] = "_vptr"; | |
15594 | ||
9c37b5ae TT |
15595 | /* Look for the C++ form of the vtable. */ |
15596 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15597 | return 1; |
15598 | ||
15599 | return 0; | |
15600 | } | |
15601 | ||
c0dd20ea | 15602 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15603 | functions, with the ABI-specified layout. If TYPE describes |
15604 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15605 | |
15606 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15607 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15608 | |
0b92b5bb TT |
15609 | static void |
15610 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15611 | { |
09e2d7c7 | 15612 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15613 | |
15614 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
15615 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
15616 | return; | |
c0dd20ea DJ |
15617 | |
15618 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15619 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15620 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15621 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15622 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15623 | return; | |
c0dd20ea DJ |
15624 | |
15625 | /* Find the type of the method. */ | |
0b92b5bb | 15626 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
15627 | if (pfn_type == NULL |
15628 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
15629 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 15630 | return; |
c0dd20ea DJ |
15631 | |
15632 | /* Look for the "this" argument. */ | |
15633 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15634 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15635 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 15636 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 15637 | return; |
c0dd20ea | 15638 | |
09e2d7c7 | 15639 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15640 | new_type = alloc_type (objfile); |
09e2d7c7 | 15641 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15642 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15643 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15644 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15645 | } |
1168df01 | 15646 | |
2b4424c3 TT |
15647 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15648 | appropriate error checking and issuing complaints if there is a | |
15649 | problem. */ | |
15650 | ||
15651 | static ULONGEST | |
15652 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15653 | { | |
15654 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15655 | ||
15656 | if (attr == nullptr) | |
15657 | return 0; | |
15658 | ||
15659 | if (!attr_form_is_constant (attr)) | |
15660 | { | |
b98664d3 | 15661 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15662 | " - DIE at %s [in module %s]"), |
15663 | sect_offset_str (die->sect_off), | |
15664 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15665 | return 0; | |
15666 | } | |
15667 | ||
15668 | ULONGEST align; | |
15669 | if (attr->form == DW_FORM_sdata) | |
15670 | { | |
15671 | LONGEST val = DW_SND (attr); | |
15672 | if (val < 0) | |
15673 | { | |
b98664d3 | 15674 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
15675 | " - DIE at %s [in module %s]"), |
15676 | sect_offset_str (die->sect_off), | |
15677 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15678 | return 0; | |
15679 | } | |
15680 | align = val; | |
15681 | } | |
15682 | else | |
15683 | align = DW_UNSND (attr); | |
15684 | ||
15685 | if (align == 0) | |
15686 | { | |
b98664d3 | 15687 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15688 | " - DIE at %s [in module %s]"), |
15689 | sect_offset_str (die->sect_off), | |
15690 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15691 | return 0; | |
15692 | } | |
15693 | if ((align & (align - 1)) != 0) | |
15694 | { | |
b98664d3 | 15695 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15696 | " - DIE at %s [in module %s]"), |
15697 | sect_offset_str (die->sect_off), | |
15698 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15699 | return 0; | |
15700 | } | |
15701 | ||
15702 | return align; | |
15703 | } | |
15704 | ||
15705 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15706 | the alignment for TYPE. */ | |
15707 | ||
15708 | static void | |
15709 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15710 | struct type *type) | |
15711 | { | |
15712 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15713 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15714 | " - DIE at %s [in module %s]"), |
15715 | sect_offset_str (die->sect_off), | |
15716 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15717 | } | |
685b1105 | 15718 | |
c906108c | 15719 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15720 | (definition) to create a type for the structure or union. Fill in |
15721 | the type's name and general properties; the members will not be | |
83655187 DE |
15722 | processed until process_structure_scope. A symbol table entry for |
15723 | the type will also not be done until process_structure_scope (assuming | |
15724 | the type has a name). | |
c906108c | 15725 | |
c767944b DJ |
15726 | NOTE: we need to call these functions regardless of whether or not the |
15727 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15728 | structure or union. This gets the type entered into our set of |
83655187 | 15729 | user defined types. */ |
c906108c | 15730 | |
f792889a | 15731 | static struct type * |
134d01f1 | 15732 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15733 | { |
518817b3 | 15734 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15735 | struct type *type; |
15736 | struct attribute *attr; | |
15d034d0 | 15737 | const char *name; |
c906108c | 15738 | |
348e048f DE |
15739 | /* If the definition of this type lives in .debug_types, read that type. |
15740 | Don't follow DW_AT_specification though, that will take us back up | |
15741 | the chain and we want to go down. */ | |
45e58e77 | 15742 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
15743 | if (attr) |
15744 | { | |
ac9ec31b | 15745 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15746 | |
ac9ec31b | 15747 | /* The type's CU may not be the same as CU. |
02142a6c | 15748 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15749 | return set_die_type (die, type, cu); |
15750 | } | |
15751 | ||
c0dd20ea | 15752 | type = alloc_type (objfile); |
c906108c | 15753 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15754 | |
39cbfefa DJ |
15755 | name = dwarf2_name (die, cu); |
15756 | if (name != NULL) | |
c906108c | 15757 | { |
987504bb | 15758 | if (cu->language == language_cplus |
c44af4eb TT |
15759 | || cu->language == language_d |
15760 | || cu->language == language_rust) | |
63d06c5c | 15761 | { |
15d034d0 | 15762 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15763 | |
15764 | /* dwarf2_full_name might have already finished building the DIE's | |
15765 | type. If so, there is no need to continue. */ | |
15766 | if (get_die_type (die, cu) != NULL) | |
15767 | return get_die_type (die, cu); | |
15768 | ||
e86ca25f | 15769 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15770 | } |
15771 | else | |
15772 | { | |
d8151005 DJ |
15773 | /* The name is already allocated along with this objfile, so |
15774 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15775 | TYPE_NAME (type) = name; |
63d06c5c | 15776 | } |
c906108c SS |
15777 | } |
15778 | ||
15779 | if (die->tag == DW_TAG_structure_type) | |
15780 | { | |
15781 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15782 | } | |
15783 | else if (die->tag == DW_TAG_union_type) | |
15784 | { | |
15785 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15786 | } | |
2ddeaf8a TT |
15787 | else if (die->tag == DW_TAG_variant_part) |
15788 | { | |
15789 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15790 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15791 | } | |
c906108c SS |
15792 | else |
15793 | { | |
4753d33b | 15794 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15795 | } |
15796 | ||
0cc2414c TT |
15797 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15798 | TYPE_DECLARED_CLASS (type) = 1; | |
15799 | ||
e142c38c | 15800 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15801 | if (attr) |
15802 | { | |
155bfbd3 JB |
15803 | if (attr_form_is_constant (attr)) |
15804 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15805 | else | |
15806 | { | |
15807 | /* For the moment, dynamic type sizes are not supported | |
15808 | by GDB's struct type. The actual size is determined | |
15809 | on-demand when resolving the type of a given object, | |
15810 | so set the type's length to zero for now. Otherwise, | |
15811 | we record an expression as the length, and that expression | |
15812 | could lead to a very large value, which could eventually | |
15813 | lead to us trying to allocate that much memory when creating | |
15814 | a value of that type. */ | |
15815 | TYPE_LENGTH (type) = 0; | |
15816 | } | |
c906108c SS |
15817 | } |
15818 | else | |
15819 | { | |
15820 | TYPE_LENGTH (type) = 0; | |
15821 | } | |
15822 | ||
2b4424c3 TT |
15823 | maybe_set_alignment (cu, die, type); |
15824 | ||
5230b05a | 15825 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15826 | { |
5230b05a WT |
15827 | /* ICC<14 does not output the required DW_AT_declaration on |
15828 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15829 | TYPE_STUB (type) = 1; |
685b1105 JK |
15830 | } |
15831 | else | |
15832 | TYPE_STUB_SUPPORTED (type) = 1; | |
15833 | ||
dc718098 | 15834 | if (die_is_declaration (die, cu)) |
876cecd0 | 15835 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15836 | else if (attr == NULL && die->child == NULL |
15837 | && producer_is_realview (cu->producer)) | |
15838 | /* RealView does not output the required DW_AT_declaration | |
15839 | on incomplete types. */ | |
15840 | TYPE_STUB (type) = 1; | |
dc718098 | 15841 | |
c906108c SS |
15842 | /* We need to add the type field to the die immediately so we don't |
15843 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15844 | type within the structure itself. */ |
1c379e20 | 15845 | set_die_type (die, type, cu); |
c906108c | 15846 | |
7e314c57 JK |
15847 | /* set_die_type should be already done. */ |
15848 | set_descriptive_type (type, die, cu); | |
15849 | ||
c767944b DJ |
15850 | return type; |
15851 | } | |
15852 | ||
2ddeaf8a TT |
15853 | /* A helper for process_structure_scope that handles a single member |
15854 | DIE. */ | |
15855 | ||
15856 | static void | |
15857 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15858 | struct field_info *fi, | |
15859 | std::vector<struct symbol *> *template_args, | |
15860 | struct dwarf2_cu *cu) | |
15861 | { | |
15862 | if (child_die->tag == DW_TAG_member | |
15863 | || child_die->tag == DW_TAG_variable | |
15864 | || child_die->tag == DW_TAG_variant_part) | |
15865 | { | |
15866 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15867 | should be a DW_TAG_member that is a declaration, but | |
15868 | all versions of G++ as of this writing (so through at | |
15869 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15870 | tags for them instead. */ | |
15871 | dwarf2_add_field (fi, child_die, cu); | |
15872 | } | |
15873 | else if (child_die->tag == DW_TAG_subprogram) | |
15874 | { | |
15875 | /* Rust doesn't have member functions in the C++ sense. | |
15876 | However, it does emit ordinary functions as children | |
15877 | of a struct DIE. */ | |
15878 | if (cu->language == language_rust) | |
15879 | read_func_scope (child_die, cu); | |
15880 | else | |
15881 | { | |
15882 | /* C++ member function. */ | |
15883 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15884 | } | |
15885 | } | |
15886 | else if (child_die->tag == DW_TAG_inheritance) | |
15887 | { | |
15888 | /* C++ base class field. */ | |
15889 | dwarf2_add_field (fi, child_die, cu); | |
15890 | } | |
15891 | else if (type_can_define_types (child_die)) | |
15892 | dwarf2_add_type_defn (fi, child_die, cu); | |
15893 | else if (child_die->tag == DW_TAG_template_type_param | |
15894 | || child_die->tag == DW_TAG_template_value_param) | |
15895 | { | |
15896 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15897 | ||
15898 | if (arg != NULL) | |
15899 | template_args->push_back (arg); | |
15900 | } | |
15901 | else if (child_die->tag == DW_TAG_variant) | |
15902 | { | |
15903 | /* In a variant we want to get the discriminant and also add a | |
15904 | field for our sole member child. */ | |
15905 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15906 | ||
bde09ab7 | 15907 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
15908 | variant_child != NULL; |
15909 | variant_child = sibling_die (variant_child)) | |
15910 | { | |
15911 | if (variant_child->tag == DW_TAG_member) | |
15912 | { | |
15913 | handle_struct_member_die (variant_child, type, fi, | |
15914 | template_args, cu); | |
15915 | /* Only handle the one. */ | |
15916 | break; | |
15917 | } | |
15918 | } | |
15919 | ||
15920 | /* We don't handle this but we might as well report it if we see | |
15921 | it. */ | |
15922 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15923 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15924 | " - DIE at %s [in module %s]"), |
15925 | sect_offset_str (child_die->sect_off), | |
15926 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15927 | ||
15928 | /* The first field was just added, so we can stash the | |
15929 | discriminant there. */ | |
be2daae6 | 15930 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15931 | if (discr == NULL) |
be2daae6 | 15932 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15933 | else |
be2daae6 | 15934 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
15935 | } |
15936 | } | |
15937 | ||
c767944b DJ |
15938 | /* Finish creating a structure or union type, including filling in |
15939 | its members and creating a symbol for it. */ | |
15940 | ||
15941 | static void | |
15942 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15943 | { | |
518817b3 | 15944 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15945 | struct die_info *child_die; |
c767944b DJ |
15946 | struct type *type; |
15947 | ||
15948 | type = get_die_type (die, cu); | |
15949 | if (type == NULL) | |
15950 | type = read_structure_type (die, cu); | |
15951 | ||
2ddeaf8a TT |
15952 | /* When reading a DW_TAG_variant_part, we need to notice when we |
15953 | read the discriminant member, so we can record it later in the | |
15954 | discriminant_info. */ | |
15955 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
15956 | sect_offset discr_offset; | |
3e1d3d8c | 15957 | bool has_template_parameters = false; |
2ddeaf8a TT |
15958 | |
15959 | if (is_variant_part) | |
15960 | { | |
15961 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15962 | if (discr == NULL) | |
15963 | { | |
15964 | /* Maybe it's a univariant form, an extension we support. | |
15965 | In this case arrange not to check the offset. */ | |
15966 | is_variant_part = false; | |
15967 | } | |
15968 | else if (attr_form_is_ref (discr)) | |
15969 | { | |
15970 | struct dwarf2_cu *target_cu = cu; | |
15971 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15972 | ||
15973 | discr_offset = target_die->sect_off; | |
15974 | } | |
15975 | else | |
15976 | { | |
b98664d3 | 15977 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
15978 | " - DIE at %s [in module %s]"), |
15979 | sect_offset_str (die->sect_off), | |
15980 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15981 | is_variant_part = false; | |
15982 | } | |
15983 | } | |
15984 | ||
e142c38c | 15985 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15986 | { |
15987 | struct field_info fi; | |
2f4732b0 | 15988 | std::vector<struct symbol *> template_args; |
c906108c | 15989 | |
639d11d3 | 15990 | child_die = die->child; |
c906108c SS |
15991 | |
15992 | while (child_die && child_die->tag) | |
15993 | { | |
2ddeaf8a | 15994 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 15995 | |
2ddeaf8a | 15996 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 15997 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 15998 | |
c906108c SS |
15999 | child_die = sibling_die (child_die); |
16000 | } | |
16001 | ||
34eaf542 | 16002 | /* Attach template arguments to type. */ |
2f4732b0 | 16003 | if (!template_args.empty ()) |
34eaf542 | 16004 | { |
3e1d3d8c | 16005 | has_template_parameters = true; |
34eaf542 | 16006 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 16007 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 16008 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
16009 | = XOBNEWVEC (&objfile->objfile_obstack, |
16010 | struct symbol *, | |
16011 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 16012 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 16013 | template_args.data (), |
34eaf542 TT |
16014 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
16015 | * sizeof (struct symbol *))); | |
34eaf542 TT |
16016 | } |
16017 | ||
c906108c SS |
16018 | /* Attach fields and member functions to the type. */ |
16019 | if (fi.nfields) | |
e7c27a73 | 16020 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 16021 | if (!fi.fnfieldlists.empty ()) |
c906108c | 16022 | { |
e7c27a73 | 16023 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 16024 | |
c5aa993b | 16025 | /* Get the type which refers to the base class (possibly this |
c906108c | 16026 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
16027 | class from the DW_AT_containing_type attribute. This use of |
16028 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 16029 | |
e142c38c | 16030 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 16031 | { |
e7c27a73 | 16032 | struct type *t = die_containing_type (die, cu); |
c906108c | 16033 | |
ae6ae975 | 16034 | set_type_vptr_basetype (type, t); |
c906108c SS |
16035 | if (type == t) |
16036 | { | |
c906108c SS |
16037 | int i; |
16038 | ||
16039 | /* Our own class provides vtbl ptr. */ | |
16040 | for (i = TYPE_NFIELDS (t) - 1; | |
16041 | i >= TYPE_N_BASECLASSES (t); | |
16042 | --i) | |
16043 | { | |
0d5cff50 | 16044 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 16045 | |
1168df01 | 16046 | if (is_vtable_name (fieldname, cu)) |
c906108c | 16047 | { |
ae6ae975 | 16048 | set_type_vptr_fieldno (type, i); |
c906108c SS |
16049 | break; |
16050 | } | |
16051 | } | |
16052 | ||
16053 | /* Complain if virtual function table field not found. */ | |
16054 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 16055 | complaint (_("virtual function table pointer " |
3e43a32a | 16056 | "not found when defining class '%s'"), |
e86ca25f | 16057 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
16058 | } |
16059 | else | |
16060 | { | |
ae6ae975 | 16061 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
16062 | } |
16063 | } | |
f6235d4c | 16064 | else if (cu->producer |
61012eef | 16065 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
16066 | { |
16067 | /* The IBM XLC compiler does not provide direct indication | |
16068 | of the containing type, but the vtable pointer is | |
16069 | always named __vfp. */ | |
16070 | ||
16071 | int i; | |
16072 | ||
16073 | for (i = TYPE_NFIELDS (type) - 1; | |
16074 | i >= TYPE_N_BASECLASSES (type); | |
16075 | --i) | |
16076 | { | |
16077 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
16078 | { | |
ae6ae975 DE |
16079 | set_type_vptr_fieldno (type, i); |
16080 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
16081 | break; |
16082 | } | |
16083 | } | |
16084 | } | |
c906108c | 16085 | } |
98751a41 JK |
16086 | |
16087 | /* Copy fi.typedef_field_list linked list elements content into the | |
16088 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 16089 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 16090 | { |
be2daae6 | 16091 | int count = fi.typedef_field_list.size (); |
98751a41 | 16092 | |
a0d7a4ff | 16093 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 16094 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 16095 | = ((struct decl_field *) |
be2daae6 TT |
16096 | TYPE_ALLOC (type, |
16097 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
16098 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 16099 | |
be2daae6 TT |
16100 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
16101 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 16102 | } |
c767944b | 16103 | |
883fd55a KS |
16104 | /* Copy fi.nested_types_list linked list elements content into the |
16105 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 16106 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 16107 | { |
be2daae6 | 16108 | int count = fi.nested_types_list.size (); |
883fd55a KS |
16109 | |
16110 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
16111 | TYPE_NESTED_TYPES_ARRAY (type) | |
16112 | = ((struct decl_field *) | |
be2daae6 TT |
16113 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
16114 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 16115 | |
be2daae6 TT |
16116 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
16117 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 16118 | } |
c906108c | 16119 | } |
63d06c5c | 16120 | |
bb5ed363 | 16121 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
16122 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
16123 | cu->rust_unions.push_back (type); | |
0b92b5bb | 16124 | |
90aeadfc DC |
16125 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
16126 | snapshots) has been known to create a die giving a declaration | |
16127 | for a class that has, as a child, a die giving a definition for a | |
16128 | nested class. So we have to process our children even if the | |
16129 | current die is a declaration. Normally, of course, a declaration | |
16130 | won't have any children at all. */ | |
134d01f1 | 16131 | |
ca040673 DE |
16132 | child_die = die->child; |
16133 | ||
90aeadfc DC |
16134 | while (child_die != NULL && child_die->tag) |
16135 | { | |
16136 | if (child_die->tag == DW_TAG_member | |
16137 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
16138 | || child_die->tag == DW_TAG_inheritance |
16139 | || child_die->tag == DW_TAG_template_value_param | |
16140 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 16141 | { |
90aeadfc | 16142 | /* Do nothing. */ |
134d01f1 | 16143 | } |
90aeadfc DC |
16144 | else |
16145 | process_die (child_die, cu); | |
134d01f1 | 16146 | |
90aeadfc | 16147 | child_die = sibling_die (child_die); |
134d01f1 DJ |
16148 | } |
16149 | ||
fa4028e9 JB |
16150 | /* Do not consider external references. According to the DWARF standard, |
16151 | these DIEs are identified by the fact that they have no byte_size | |
16152 | attribute, and a declaration attribute. */ | |
16153 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
16154 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
16155 | { |
16156 | struct symbol *sym = new_symbol (die, type, cu); | |
16157 | ||
16158 | if (has_template_parameters) | |
16159 | { | |
a776957c TT |
16160 | struct symtab *symtab; |
16161 | if (sym != nullptr) | |
16162 | symtab = symbol_symtab (sym); | |
16163 | else if (cu->line_header != nullptr) | |
16164 | { | |
16165 | /* Any related symtab will do. */ | |
16166 | symtab | |
16167 | = cu->line_header->file_name_at (file_name_index (1))->symtab; | |
16168 | } | |
16169 | else | |
16170 | { | |
16171 | symtab = nullptr; | |
16172 | complaint (_("could not find suitable " | |
16173 | "symtab for template parameter" | |
16174 | " - DIE at %s [in module %s]"), | |
16175 | sect_offset_str (die->sect_off), | |
16176 | objfile_name (objfile)); | |
16177 | } | |
16178 | ||
16179 | if (symtab != nullptr) | |
16180 | { | |
16181 | /* Make sure that the symtab is set on the new symbols. | |
16182 | Even though they don't appear in this symtab directly, | |
16183 | other parts of gdb assume that symbols do, and this is | |
16184 | reasonably true. */ | |
16185 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
16186 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
16187 | } | |
3e1d3d8c TT |
16188 | } |
16189 | } | |
134d01f1 DJ |
16190 | } |
16191 | ||
55426c9d JB |
16192 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
16193 | update TYPE using some information only available in DIE's children. */ | |
16194 | ||
16195 | static void | |
16196 | update_enumeration_type_from_children (struct die_info *die, | |
16197 | struct type *type, | |
16198 | struct dwarf2_cu *cu) | |
16199 | { | |
60f7655a | 16200 | struct die_info *child_die; |
55426c9d JB |
16201 | int unsigned_enum = 1; |
16202 | int flag_enum = 1; | |
16203 | ULONGEST mask = 0; | |
55426c9d | 16204 | |
8268c778 | 16205 | auto_obstack obstack; |
55426c9d | 16206 | |
60f7655a DE |
16207 | for (child_die = die->child; |
16208 | child_die != NULL && child_die->tag; | |
16209 | child_die = sibling_die (child_die)) | |
55426c9d JB |
16210 | { |
16211 | struct attribute *attr; | |
16212 | LONGEST value; | |
16213 | const gdb_byte *bytes; | |
16214 | struct dwarf2_locexpr_baton *baton; | |
16215 | const char *name; | |
60f7655a | 16216 | |
55426c9d JB |
16217 | if (child_die->tag != DW_TAG_enumerator) |
16218 | continue; | |
16219 | ||
16220 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16221 | if (attr == NULL) | |
16222 | continue; | |
16223 | ||
16224 | name = dwarf2_name (child_die, cu); | |
16225 | if (name == NULL) | |
16226 | name = "<anonymous enumerator>"; | |
16227 | ||
16228 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16229 | &value, &bytes, &baton); | |
16230 | if (value < 0) | |
16231 | { | |
16232 | unsigned_enum = 0; | |
16233 | flag_enum = 0; | |
16234 | } | |
16235 | else if ((mask & value) != 0) | |
16236 | flag_enum = 0; | |
16237 | else | |
16238 | mask |= value; | |
16239 | ||
16240 | /* If we already know that the enum type is neither unsigned, nor | |
16241 | a flag type, no need to look at the rest of the enumerates. */ | |
16242 | if (!unsigned_enum && !flag_enum) | |
16243 | break; | |
55426c9d JB |
16244 | } |
16245 | ||
16246 | if (unsigned_enum) | |
16247 | TYPE_UNSIGNED (type) = 1; | |
16248 | if (flag_enum) | |
16249 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
16250 | } |
16251 | ||
134d01f1 DJ |
16252 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16253 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16254 | |
f792889a | 16255 | static struct type * |
134d01f1 | 16256 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16257 | { |
518817b3 | 16258 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16259 | struct type *type; |
c906108c | 16260 | struct attribute *attr; |
0114d602 | 16261 | const char *name; |
134d01f1 | 16262 | |
348e048f DE |
16263 | /* If the definition of this type lives in .debug_types, read that type. |
16264 | Don't follow DW_AT_specification though, that will take us back up | |
16265 | the chain and we want to go down. */ | |
45e58e77 | 16266 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
16267 | if (attr) |
16268 | { | |
ac9ec31b | 16269 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16270 | |
ac9ec31b | 16271 | /* The type's CU may not be the same as CU. |
02142a6c | 16272 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16273 | return set_die_type (die, type, cu); |
16274 | } | |
16275 | ||
c906108c SS |
16276 | type = alloc_type (objfile); |
16277 | ||
16278 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 16279 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16280 | if (name != NULL) |
e86ca25f | 16281 | TYPE_NAME (type) = name; |
c906108c | 16282 | |
0626fc76 TT |
16283 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16284 | if (attr != NULL) | |
16285 | { | |
16286 | struct type *underlying_type = die_type (die, cu); | |
16287 | ||
16288 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16289 | } | |
16290 | ||
e142c38c | 16291 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
16292 | if (attr) |
16293 | { | |
16294 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16295 | } | |
16296 | else | |
16297 | { | |
16298 | TYPE_LENGTH (type) = 0; | |
16299 | } | |
16300 | ||
2b4424c3 TT |
16301 | maybe_set_alignment (cu, die, type); |
16302 | ||
137033e9 JB |
16303 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16304 | declared as private in the package spec, and then defined only | |
16305 | inside the package body. Such types are known as Taft Amendment | |
16306 | Types. When another package uses such a type, an incomplete DIE | |
16307 | may be generated by the compiler. */ | |
02eb380e | 16308 | if (die_is_declaration (die, cu)) |
876cecd0 | 16309 | TYPE_STUB (type) = 1; |
02eb380e | 16310 | |
0626fc76 TT |
16311 | /* Finish the creation of this type by using the enum's children. |
16312 | We must call this even when the underlying type has been provided | |
16313 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
16314 | update_enumeration_type_from_children (die, type, cu); |
16315 | ||
0626fc76 TT |
16316 | /* If this type has an underlying type that is not a stub, then we |
16317 | may use its attributes. We always use the "unsigned" attribute | |
16318 | in this situation, because ordinarily we guess whether the type | |
16319 | is unsigned -- but the guess can be wrong and the underlying type | |
16320 | can tell us the reality. However, we defer to a local size | |
16321 | attribute if one exists, because this lets the compiler override | |
16322 | the underlying type if needed. */ | |
16323 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
16324 | { | |
16325 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
16326 | if (TYPE_LENGTH (type) == 0) | |
16327 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
16328 | if (TYPE_RAW_ALIGN (type) == 0 |
16329 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
16330 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
16331 | } |
16332 | ||
3d567982 TT |
16333 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
16334 | ||
f792889a | 16335 | return set_die_type (die, type, cu); |
134d01f1 DJ |
16336 | } |
16337 | ||
16338 | /* Given a pointer to a die which begins an enumeration, process all | |
16339 | the dies that define the members of the enumeration, and create the | |
16340 | symbol for the enumeration type. | |
16341 | ||
16342 | NOTE: We reverse the order of the element list. */ | |
16343 | ||
16344 | static void | |
16345 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16346 | { | |
f792889a | 16347 | struct type *this_type; |
134d01f1 | 16348 | |
f792889a DJ |
16349 | this_type = get_die_type (die, cu); |
16350 | if (this_type == NULL) | |
16351 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16352 | |
639d11d3 | 16353 | if (die->child != NULL) |
c906108c | 16354 | { |
9dc481d3 DE |
16355 | struct die_info *child_die; |
16356 | struct symbol *sym; | |
16357 | struct field *fields = NULL; | |
16358 | int num_fields = 0; | |
15d034d0 | 16359 | const char *name; |
9dc481d3 | 16360 | |
639d11d3 | 16361 | child_die = die->child; |
c906108c SS |
16362 | while (child_die && child_die->tag) |
16363 | { | |
16364 | if (child_die->tag != DW_TAG_enumerator) | |
16365 | { | |
e7c27a73 | 16366 | process_die (child_die, cu); |
c906108c SS |
16367 | } |
16368 | else | |
16369 | { | |
39cbfefa DJ |
16370 | name = dwarf2_name (child_die, cu); |
16371 | if (name) | |
c906108c | 16372 | { |
f792889a | 16373 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
16374 | |
16375 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
16376 | { | |
16377 | fields = (struct field *) | |
16378 | xrealloc (fields, | |
16379 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 16380 | * sizeof (struct field)); |
c906108c SS |
16381 | } |
16382 | ||
3567439c | 16383 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 16384 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 16385 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
16386 | FIELD_BITSIZE (fields[num_fields]) = 0; |
16387 | ||
16388 | num_fields++; | |
16389 | } | |
16390 | } | |
16391 | ||
16392 | child_die = sibling_die (child_die); | |
16393 | } | |
16394 | ||
16395 | if (num_fields) | |
16396 | { | |
f792889a DJ |
16397 | TYPE_NFIELDS (this_type) = num_fields; |
16398 | TYPE_FIELDS (this_type) = (struct field *) | |
16399 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
16400 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 16401 | sizeof (struct field) * num_fields); |
b8c9b27d | 16402 | xfree (fields); |
c906108c | 16403 | } |
c906108c | 16404 | } |
134d01f1 | 16405 | |
6c83ed52 TT |
16406 | /* If we are reading an enum from a .debug_types unit, and the enum |
16407 | is a declaration, and the enum is not the signatured type in the | |
16408 | unit, then we do not want to add a symbol for it. Adding a | |
16409 | symbol would in some cases obscure the true definition of the | |
16410 | enum, giving users an incomplete type when the definition is | |
16411 | actually available. Note that we do not want to do this for all | |
16412 | enums which are just declarations, because C++0x allows forward | |
16413 | enum declarations. */ | |
3019eac3 | 16414 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16415 | && die_is_declaration (die, cu)) |
16416 | { | |
52dc124a | 16417 | struct signatured_type *sig_type; |
6c83ed52 | 16418 | |
c0f78cd4 | 16419 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16420 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16421 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16422 | return; |
16423 | } | |
16424 | ||
f792889a | 16425 | new_symbol (die, this_type, cu); |
c906108c SS |
16426 | } |
16427 | ||
16428 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16429 | the DIE's type field. For now, this only handles one dimensional | |
16430 | arrays. */ | |
16431 | ||
f792889a | 16432 | static struct type * |
e7c27a73 | 16433 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16434 | { |
518817b3 | 16435 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16436 | struct die_info *child_die; |
7e314c57 | 16437 | struct type *type; |
c906108c | 16438 | struct type *element_type, *range_type, *index_type; |
c906108c | 16439 | struct attribute *attr; |
15d034d0 | 16440 | const char *name; |
a405673c | 16441 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16442 | unsigned int bit_stride = 0; |
c906108c | 16443 | |
e7c27a73 | 16444 | element_type = die_type (die, cu); |
c906108c | 16445 | |
7e314c57 JK |
16446 | /* The die_type call above may have already set the type for this DIE. */ |
16447 | type = get_die_type (die, cu); | |
16448 | if (type) | |
16449 | return type; | |
16450 | ||
dc53a7ad JB |
16451 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16452 | if (attr != NULL) | |
a405673c JB |
16453 | { |
16454 | int stride_ok; | |
9a49df9d AB |
16455 | struct type *prop_type |
16456 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
a405673c JB |
16457 | |
16458 | byte_stride_prop | |
16459 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16460 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16461 | prop_type); | |
a405673c JB |
16462 | if (!stride_ok) |
16463 | { | |
b98664d3 | 16464 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16465 | " - DIE at %s [in module %s]"), |
16466 | sect_offset_str (die->sect_off), | |
518817b3 | 16467 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
16468 | /* Ignore this attribute. We will likely not be able to print |
16469 | arrays of this type correctly, but there is little we can do | |
16470 | to help if we cannot read the attribute's value. */ | |
16471 | byte_stride_prop = NULL; | |
16472 | } | |
16473 | } | |
dc53a7ad JB |
16474 | |
16475 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16476 | if (attr != NULL) | |
16477 | bit_stride = DW_UNSND (attr); | |
16478 | ||
c906108c SS |
16479 | /* Irix 6.2 native cc creates array types without children for |
16480 | arrays with unspecified length. */ | |
639d11d3 | 16481 | if (die->child == NULL) |
c906108c | 16482 | { |
46bf5051 | 16483 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16484 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16485 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16486 | byte_stride_prop, bit_stride); |
f792889a | 16487 | return set_die_type (die, type, cu); |
c906108c SS |
16488 | } |
16489 | ||
791afaa2 | 16490 | std::vector<struct type *> range_types; |
639d11d3 | 16491 | child_die = die->child; |
c906108c SS |
16492 | while (child_die && child_die->tag) |
16493 | { | |
16494 | if (child_die->tag == DW_TAG_subrange_type) | |
16495 | { | |
f792889a | 16496 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16497 | |
f792889a | 16498 | if (child_type != NULL) |
a02abb62 | 16499 | { |
0963b4bd MS |
16500 | /* The range type was succesfully read. Save it for the |
16501 | array type creation. */ | |
791afaa2 | 16502 | range_types.push_back (child_type); |
a02abb62 | 16503 | } |
c906108c SS |
16504 | } |
16505 | child_die = sibling_die (child_die); | |
16506 | } | |
16507 | ||
16508 | /* Dwarf2 dimensions are output from left to right, create the | |
16509 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16510 | |
c906108c | 16511 | type = element_type; |
7ca2d3a3 DL |
16512 | |
16513 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16514 | { | |
16515 | int i = 0; | |
9a619af0 | 16516 | |
791afaa2 | 16517 | while (i < range_types.size ()) |
dc53a7ad | 16518 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 16519 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
16520 | } |
16521 | else | |
16522 | { | |
791afaa2 | 16523 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16524 | while (ndim-- > 0) |
dc53a7ad | 16525 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 16526 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 16527 | } |
c906108c | 16528 | |
f5f8a009 EZ |
16529 | /* Understand Dwarf2 support for vector types (like they occur on |
16530 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16531 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16532 | custom vendor extension. The main difference between a regular | |
16533 | array and the vector variant is that vectors are passed by value | |
16534 | to functions. */ | |
e142c38c | 16535 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 16536 | if (attr) |
ea37ba09 | 16537 | make_vector_type (type); |
f5f8a009 | 16538 | |
dbc98a8b KW |
16539 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16540 | implementation may choose to implement triple vectors using this | |
16541 | attribute. */ | |
16542 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
16543 | if (attr) | |
16544 | { | |
16545 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16546 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16547 | else | |
b98664d3 | 16548 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16549 | "than the total size of elements")); |
dbc98a8b KW |
16550 | } |
16551 | ||
39cbfefa DJ |
16552 | name = dwarf2_name (die, cu); |
16553 | if (name) | |
16554 | TYPE_NAME (type) = name; | |
6e70227d | 16555 | |
2b4424c3 TT |
16556 | maybe_set_alignment (cu, die, type); |
16557 | ||
0963b4bd | 16558 | /* Install the type in the die. */ |
7e314c57 JK |
16559 | set_die_type (die, type, cu); |
16560 | ||
16561 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16562 | set_descriptive_type (type, die, cu); |
16563 | ||
7e314c57 | 16564 | return type; |
c906108c SS |
16565 | } |
16566 | ||
7ca2d3a3 | 16567 | static enum dwarf_array_dim_ordering |
6e70227d | 16568 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16569 | { |
16570 | struct attribute *attr; | |
16571 | ||
16572 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16573 | ||
aead7601 SM |
16574 | if (attr) |
16575 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 16576 | |
0963b4bd MS |
16577 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16578 | opposite order to the dwarf2 specification, but data is still | |
16579 | laid out as per normal fortran. | |
7ca2d3a3 | 16580 | |
0963b4bd MS |
16581 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16582 | version checking. */ | |
7ca2d3a3 | 16583 | |
905e0470 PM |
16584 | if (cu->language == language_fortran |
16585 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16586 | { |
16587 | return DW_ORD_row_major; | |
16588 | } | |
16589 | ||
6e70227d | 16590 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16591 | { |
16592 | case array_column_major: | |
16593 | return DW_ORD_col_major; | |
16594 | case array_row_major: | |
16595 | default: | |
16596 | return DW_ORD_row_major; | |
16597 | }; | |
16598 | } | |
16599 | ||
72019c9c | 16600 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16601 | the DIE's type field. */ |
72019c9c | 16602 | |
f792889a | 16603 | static struct type * |
72019c9c GM |
16604 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16605 | { | |
7e314c57 JK |
16606 | struct type *domain_type, *set_type; |
16607 | struct attribute *attr; | |
f792889a | 16608 | |
7e314c57 JK |
16609 | domain_type = die_type (die, cu); |
16610 | ||
16611 | /* The die_type call above may have already set the type for this DIE. */ | |
16612 | set_type = get_die_type (die, cu); | |
16613 | if (set_type) | |
16614 | return set_type; | |
16615 | ||
16616 | set_type = create_set_type (NULL, domain_type); | |
16617 | ||
16618 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
16619 | if (attr) |
16620 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 16621 | |
2b4424c3 TT |
16622 | maybe_set_alignment (cu, die, set_type); |
16623 | ||
f792889a | 16624 | return set_die_type (die, set_type, cu); |
72019c9c | 16625 | } |
7ca2d3a3 | 16626 | |
0971de02 TT |
16627 | /* A helper for read_common_block that creates a locexpr baton. |
16628 | SYM is the symbol which we are marking as computed. | |
16629 | COMMON_DIE is the DIE for the common block. | |
16630 | COMMON_LOC is the location expression attribute for the common | |
16631 | block itself. | |
16632 | MEMBER_LOC is the location expression attribute for the particular | |
16633 | member of the common block that we are processing. | |
16634 | CU is the CU from which the above come. */ | |
16635 | ||
16636 | static void | |
16637 | mark_common_block_symbol_computed (struct symbol *sym, | |
16638 | struct die_info *common_die, | |
16639 | struct attribute *common_loc, | |
16640 | struct attribute *member_loc, | |
16641 | struct dwarf2_cu *cu) | |
16642 | { | |
518817b3 SM |
16643 | struct dwarf2_per_objfile *dwarf2_per_objfile |
16644 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
16645 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
16646 | struct dwarf2_locexpr_baton *baton; | |
16647 | gdb_byte *ptr; | |
16648 | unsigned int cu_off; | |
16649 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
16650 | LONGEST offset = 0; | |
16651 | ||
16652 | gdb_assert (common_loc && member_loc); | |
16653 | gdb_assert (attr_form_is_block (common_loc)); | |
16654 | gdb_assert (attr_form_is_block (member_loc) | |
16655 | || attr_form_is_constant (member_loc)); | |
16656 | ||
8d749320 | 16657 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16658 | baton->per_cu = cu->per_cu; |
16659 | gdb_assert (baton->per_cu); | |
16660 | ||
16661 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16662 | ||
16663 | if (attr_form_is_constant (member_loc)) | |
16664 | { | |
16665 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
16666 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
16667 | } | |
16668 | else | |
16669 | baton->size += DW_BLOCK (member_loc)->size; | |
16670 | ||
224c3ddb | 16671 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16672 | baton->data = ptr; |
16673 | ||
16674 | *ptr++ = DW_OP_call4; | |
9c541725 | 16675 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16676 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16677 | ptr += 4; | |
16678 | ||
16679 | if (attr_form_is_constant (member_loc)) | |
16680 | { | |
16681 | *ptr++ = DW_OP_addr; | |
16682 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16683 | ptr += cu->header.addr_size; | |
16684 | } | |
16685 | else | |
16686 | { | |
16687 | /* We have to copy the data here, because DW_OP_call4 will only | |
16688 | use a DW_AT_location attribute. */ | |
16689 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16690 | ptr += DW_BLOCK (member_loc)->size; | |
16691 | } | |
16692 | ||
16693 | *ptr++ = DW_OP_plus; | |
16694 | gdb_assert (ptr - baton->data == baton->size); | |
16695 | ||
0971de02 | 16696 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16697 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16698 | } |
16699 | ||
4357ac6c TT |
16700 | /* Create appropriate locally-scoped variables for all the |
16701 | DW_TAG_common_block entries. Also create a struct common_block | |
16702 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
16703 | is used to sepate the common blocks name namespace from regular | |
16704 | variable names. */ | |
c906108c SS |
16705 | |
16706 | static void | |
e7c27a73 | 16707 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16708 | { |
0971de02 TT |
16709 | struct attribute *attr; |
16710 | ||
16711 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
16712 | if (attr) | |
16713 | { | |
16714 | /* Support the .debug_loc offsets. */ | |
16715 | if (attr_form_is_block (attr)) | |
16716 | { | |
16717 | /* Ok. */ | |
16718 | } | |
16719 | else if (attr_form_is_section_offset (attr)) | |
16720 | { | |
16721 | dwarf2_complex_location_expr_complaint (); | |
16722 | attr = NULL; | |
16723 | } | |
16724 | else | |
16725 | { | |
16726 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16727 | "common block member"); | |
16728 | attr = NULL; | |
16729 | } | |
16730 | } | |
16731 | ||
639d11d3 | 16732 | if (die->child != NULL) |
c906108c | 16733 | { |
518817b3 | 16734 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16735 | struct die_info *child_die; |
16736 | size_t n_entries = 0, size; | |
16737 | struct common_block *common_block; | |
16738 | struct symbol *sym; | |
74ac6d43 | 16739 | |
4357ac6c TT |
16740 | for (child_die = die->child; |
16741 | child_die && child_die->tag; | |
16742 | child_die = sibling_die (child_die)) | |
16743 | ++n_entries; | |
16744 | ||
16745 | size = (sizeof (struct common_block) | |
16746 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16747 | common_block |
16748 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16749 | size); | |
4357ac6c TT |
16750 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16751 | common_block->n_entries = 0; | |
16752 | ||
16753 | for (child_die = die->child; | |
16754 | child_die && child_die->tag; | |
16755 | child_die = sibling_die (child_die)) | |
16756 | { | |
16757 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16758 | symbol scope. */ | |
e7c27a73 | 16759 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16760 | if (sym != NULL) |
16761 | { | |
16762 | struct attribute *member_loc; | |
16763 | ||
16764 | common_block->contents[common_block->n_entries++] = sym; | |
16765 | ||
16766 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16767 | cu); | |
16768 | if (member_loc) | |
16769 | { | |
16770 | /* GDB has handled this for a long time, but it is | |
16771 | not specified by DWARF. It seems to have been | |
16772 | emitted by gfortran at least as recently as: | |
16773 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16774 | complaint (_("Variable in common block has " |
0971de02 | 16775 | "DW_AT_data_member_location " |
9d8780f0 SM |
16776 | "- DIE at %s [in module %s]"), |
16777 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16778 | objfile_name (objfile)); |
0971de02 TT |
16779 | |
16780 | if (attr_form_is_section_offset (member_loc)) | |
16781 | dwarf2_complex_location_expr_complaint (); | |
16782 | else if (attr_form_is_constant (member_loc) | |
16783 | || attr_form_is_block (member_loc)) | |
16784 | { | |
16785 | if (attr) | |
16786 | mark_common_block_symbol_computed (sym, die, attr, | |
16787 | member_loc, cu); | |
16788 | } | |
16789 | else | |
16790 | dwarf2_complex_location_expr_complaint (); | |
16791 | } | |
16792 | } | |
c906108c | 16793 | } |
4357ac6c TT |
16794 | |
16795 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16796 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16797 | } |
16798 | } | |
16799 | ||
0114d602 | 16800 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16801 | |
0114d602 DJ |
16802 | static struct type * |
16803 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16804 | { |
518817b3 | 16805 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16806 | const char *previous_prefix, *name; |
9219021c | 16807 | int is_anonymous; |
0114d602 DJ |
16808 | struct type *type; |
16809 | ||
16810 | /* For extensions, reuse the type of the original namespace. */ | |
16811 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16812 | { | |
16813 | struct die_info *ext_die; | |
16814 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16815 | |
0114d602 DJ |
16816 | ext_die = dwarf2_extension (die, &ext_cu); |
16817 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16818 | |
16819 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16820 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16821 | return set_die_type (die, type, cu); |
16822 | } | |
9219021c | 16823 | |
e142c38c | 16824 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16825 | |
16826 | /* Now build the name of the current namespace. */ | |
16827 | ||
0114d602 DJ |
16828 | previous_prefix = determine_prefix (die, cu); |
16829 | if (previous_prefix[0] != '\0') | |
16830 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16831 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16832 | |
16833 | /* Create the type. */ | |
19f392bc | 16834 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16835 | |
60531b24 | 16836 | return set_die_type (die, type, cu); |
0114d602 DJ |
16837 | } |
16838 | ||
22cee43f | 16839 | /* Read a namespace scope. */ |
0114d602 DJ |
16840 | |
16841 | static void | |
16842 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16843 | { | |
518817b3 | 16844 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16845 | int is_anonymous; |
9219021c | 16846 | |
5c4e30ca DC |
16847 | /* Add a symbol associated to this if we haven't seen the namespace |
16848 | before. Also, add a using directive if it's an anonymous | |
16849 | namespace. */ | |
9219021c | 16850 | |
f2f0e013 | 16851 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16852 | { |
16853 | struct type *type; | |
16854 | ||
0114d602 | 16855 | type = read_type_die (die, cu); |
e7c27a73 | 16856 | new_symbol (die, type, cu); |
5c4e30ca | 16857 | |
e8e80198 | 16858 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16859 | if (is_anonymous) |
0114d602 DJ |
16860 | { |
16861 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16862 | |
eb1e02fd | 16863 | std::vector<const char *> excludes; |
804d2729 | 16864 | add_using_directive (using_directives (cu), |
22cee43f | 16865 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16866 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16867 | } |
5c4e30ca | 16868 | } |
9219021c | 16869 | |
639d11d3 | 16870 | if (die->child != NULL) |
d9fa45fe | 16871 | { |
639d11d3 | 16872 | struct die_info *child_die = die->child; |
6e70227d | 16873 | |
d9fa45fe DC |
16874 | while (child_die && child_die->tag) |
16875 | { | |
e7c27a73 | 16876 | process_die (child_die, cu); |
d9fa45fe DC |
16877 | child_die = sibling_die (child_die); |
16878 | } | |
16879 | } | |
38d518c9 EZ |
16880 | } |
16881 | ||
f55ee35c JK |
16882 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16883 | imported module. Still we need that type as local Fortran "use ... only" | |
16884 | declaration imports depend on the created type in determine_prefix. */ | |
16885 | ||
16886 | static struct type * | |
16887 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16888 | { | |
518817b3 | 16889 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16890 | const char *module_name; |
f55ee35c JK |
16891 | struct type *type; |
16892 | ||
16893 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16894 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16895 | |
f55ee35c JK |
16896 | return set_die_type (die, type, cu); |
16897 | } | |
16898 | ||
5d7cb8df JK |
16899 | /* Read a Fortran module. */ |
16900 | ||
16901 | static void | |
16902 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16903 | { | |
16904 | struct die_info *child_die = die->child; | |
530e8392 KB |
16905 | struct type *type; |
16906 | ||
16907 | type = read_type_die (die, cu); | |
16908 | new_symbol (die, type, cu); | |
5d7cb8df | 16909 | |
5d7cb8df JK |
16910 | while (child_die && child_die->tag) |
16911 | { | |
16912 | process_die (child_die, cu); | |
16913 | child_die = sibling_die (child_die); | |
16914 | } | |
16915 | } | |
16916 | ||
38d518c9 EZ |
16917 | /* Return the name of the namespace represented by DIE. Set |
16918 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16919 | namespace. */ | |
16920 | ||
16921 | static const char * | |
e142c38c | 16922 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16923 | { |
16924 | struct die_info *current_die; | |
16925 | const char *name = NULL; | |
16926 | ||
16927 | /* Loop through the extensions until we find a name. */ | |
16928 | ||
16929 | for (current_die = die; | |
16930 | current_die != NULL; | |
f2f0e013 | 16931 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16932 | { |
96553a0c DE |
16933 | /* We don't use dwarf2_name here so that we can detect the absence |
16934 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16935 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16936 | |
38d518c9 EZ |
16937 | if (name != NULL) |
16938 | break; | |
16939 | } | |
16940 | ||
16941 | /* Is it an anonymous namespace? */ | |
16942 | ||
16943 | *is_anonymous = (name == NULL); | |
16944 | if (*is_anonymous) | |
2b1dbab0 | 16945 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16946 | |
16947 | return name; | |
d9fa45fe DC |
16948 | } |
16949 | ||
c906108c SS |
16950 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16951 | the user defined type vector. */ | |
16952 | ||
f792889a | 16953 | static struct type * |
e7c27a73 | 16954 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16955 | { |
518817b3 SM |
16956 | struct gdbarch *gdbarch |
16957 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 16958 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16959 | struct type *type; |
8b2dbe47 KB |
16960 | struct attribute *attr_byte_size; |
16961 | struct attribute *attr_address_class; | |
16962 | int byte_size, addr_class; | |
7e314c57 JK |
16963 | struct type *target_type; |
16964 | ||
16965 | target_type = die_type (die, cu); | |
c906108c | 16966 | |
7e314c57 JK |
16967 | /* The die_type call above may have already set the type for this DIE. */ |
16968 | type = get_die_type (die, cu); | |
16969 | if (type) | |
16970 | return type; | |
16971 | ||
16972 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16973 | |
e142c38c | 16974 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16975 | if (attr_byte_size) |
16976 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16977 | else |
8b2dbe47 KB |
16978 | byte_size = cu_header->addr_size; |
16979 | ||
e142c38c | 16980 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16981 | if (attr_address_class) |
16982 | addr_class = DW_UNSND (attr_address_class); | |
16983 | else | |
16984 | addr_class = DW_ADDR_none; | |
16985 | ||
2b4424c3 TT |
16986 | ULONGEST alignment = get_alignment (cu, die); |
16987 | ||
16988 | /* If the pointer size, alignment, or address class is different | |
16989 | than the default, create a type variant marked as such and set | |
16990 | the length accordingly. */ | |
16991 | if (TYPE_LENGTH (type) != byte_size | |
16992 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16993 | && alignment != TYPE_RAW_ALIGN (type)) | |
16994 | || addr_class != DW_ADDR_none) | |
c906108c | 16995 | { |
5e2b427d | 16996 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16997 | { |
16998 | int type_flags; | |
16999 | ||
849957d9 | 17000 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 17001 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
17002 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
17003 | == 0); | |
8b2dbe47 KB |
17004 | type = make_type_with_address_space (type, type_flags); |
17005 | } | |
17006 | else if (TYPE_LENGTH (type) != byte_size) | |
17007 | { | |
b98664d3 | 17008 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 17009 | } |
2b4424c3 TT |
17010 | else if (TYPE_RAW_ALIGN (type) != alignment) |
17011 | { | |
b98664d3 | 17012 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
17013 | " - DIE at %s [in module %s]"), |
17014 | sect_offset_str (die->sect_off), | |
17015 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17016 | } | |
6e70227d | 17017 | else |
9a619af0 MS |
17018 | { |
17019 | /* Should we also complain about unhandled address classes? */ | |
17020 | } | |
c906108c | 17021 | } |
8b2dbe47 KB |
17022 | |
17023 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 17024 | set_type_align (type, alignment); |
f792889a | 17025 | return set_die_type (die, type, cu); |
c906108c SS |
17026 | } |
17027 | ||
17028 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
17029 | the user defined type vector. */ | |
17030 | ||
f792889a | 17031 | static struct type * |
e7c27a73 | 17032 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
17033 | { |
17034 | struct type *type; | |
17035 | struct type *to_type; | |
17036 | struct type *domain; | |
17037 | ||
e7c27a73 DJ |
17038 | to_type = die_type (die, cu); |
17039 | domain = die_containing_type (die, cu); | |
0d5de010 | 17040 | |
7e314c57 JK |
17041 | /* The calls above may have already set the type for this DIE. */ |
17042 | type = get_die_type (die, cu); | |
17043 | if (type) | |
17044 | return type; | |
17045 | ||
0d5de010 DJ |
17046 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
17047 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
17048 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
17049 | { | |
518817b3 SM |
17050 | struct type *new_type |
17051 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
17052 | |
17053 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
17054 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
17055 | TYPE_VARARGS (to_type)); | |
17056 | type = lookup_methodptr_type (new_type); | |
17057 | } | |
0d5de010 DJ |
17058 | else |
17059 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 17060 | |
f792889a | 17061 | return set_die_type (die, type, cu); |
c906108c SS |
17062 | } |
17063 | ||
4297a3f0 | 17064 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
17065 | the user defined type vector. */ |
17066 | ||
f792889a | 17067 | static struct type * |
4297a3f0 AV |
17068 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
17069 | enum type_code refcode) | |
c906108c | 17070 | { |
e7c27a73 | 17071 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 17072 | struct type *type, *target_type; |
c906108c SS |
17073 | struct attribute *attr; |
17074 | ||
4297a3f0 AV |
17075 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
17076 | ||
7e314c57 JK |
17077 | target_type = die_type (die, cu); |
17078 | ||
17079 | /* The die_type call above may have already set the type for this DIE. */ | |
17080 | type = get_die_type (die, cu); | |
17081 | if (type) | |
17082 | return type; | |
17083 | ||
4297a3f0 | 17084 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 17085 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17086 | if (attr) |
17087 | { | |
17088 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
17089 | } | |
17090 | else | |
17091 | { | |
107d2387 | 17092 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 17093 | } |
2b4424c3 | 17094 | maybe_set_alignment (cu, die, type); |
f792889a | 17095 | return set_die_type (die, type, cu); |
c906108c SS |
17096 | } |
17097 | ||
cf363f18 MW |
17098 | /* Add the given cv-qualifiers to the element type of the array. GCC |
17099 | outputs DWARF type qualifiers that apply to an array, not the | |
17100 | element type. But GDB relies on the array element type to carry | |
17101 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
17102 | specification. */ | |
17103 | ||
17104 | static struct type * | |
17105 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
17106 | struct type *base_type, int cnst, int voltl) | |
17107 | { | |
17108 | struct type *el_type, *inner_array; | |
17109 | ||
17110 | base_type = copy_type (base_type); | |
17111 | inner_array = base_type; | |
17112 | ||
17113 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
17114 | { | |
17115 | TYPE_TARGET_TYPE (inner_array) = | |
17116 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
17117 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
17118 | } | |
17119 | ||
17120 | el_type = TYPE_TARGET_TYPE (inner_array); | |
17121 | cnst |= TYPE_CONST (el_type); | |
17122 | voltl |= TYPE_VOLATILE (el_type); | |
17123 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
17124 | ||
17125 | return set_die_type (die, base_type, cu); | |
17126 | } | |
17127 | ||
f792889a | 17128 | static struct type * |
e7c27a73 | 17129 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17130 | { |
f792889a | 17131 | struct type *base_type, *cv_type; |
c906108c | 17132 | |
e7c27a73 | 17133 | base_type = die_type (die, cu); |
7e314c57 JK |
17134 | |
17135 | /* The die_type call above may have already set the type for this DIE. */ | |
17136 | cv_type = get_die_type (die, cu); | |
17137 | if (cv_type) | |
17138 | return cv_type; | |
17139 | ||
2f608a3a KW |
17140 | /* In case the const qualifier is applied to an array type, the element type |
17141 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
17142 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 17143 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17144 | |
f792889a DJ |
17145 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17146 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17147 | } |
17148 | ||
f792889a | 17149 | static struct type * |
e7c27a73 | 17150 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17151 | { |
f792889a | 17152 | struct type *base_type, *cv_type; |
c906108c | 17153 | |
e7c27a73 | 17154 | base_type = die_type (die, cu); |
7e314c57 JK |
17155 | |
17156 | /* The die_type call above may have already set the type for this DIE. */ | |
17157 | cv_type = get_die_type (die, cu); | |
17158 | if (cv_type) | |
17159 | return cv_type; | |
17160 | ||
cf363f18 MW |
17161 | /* In case the volatile qualifier is applied to an array type, the |
17162 | element type is so qualified, not the array type (section 6.7.3 | |
17163 | of C99). */ | |
17164 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
17165 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
17166 | ||
f792889a DJ |
17167 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17168 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17169 | } |
17170 | ||
06d66ee9 TT |
17171 | /* Handle DW_TAG_restrict_type. */ |
17172 | ||
17173 | static struct type * | |
17174 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17175 | { | |
17176 | struct type *base_type, *cv_type; | |
17177 | ||
17178 | base_type = die_type (die, cu); | |
17179 | ||
17180 | /* The die_type call above may have already set the type for this DIE. */ | |
17181 | cv_type = get_die_type (die, cu); | |
17182 | if (cv_type) | |
17183 | return cv_type; | |
17184 | ||
17185 | cv_type = make_restrict_type (base_type); | |
17186 | return set_die_type (die, cv_type, cu); | |
17187 | } | |
17188 | ||
a2c2acaf MW |
17189 | /* Handle DW_TAG_atomic_type. */ |
17190 | ||
17191 | static struct type * | |
17192 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17193 | { | |
17194 | struct type *base_type, *cv_type; | |
17195 | ||
17196 | base_type = die_type (die, cu); | |
17197 | ||
17198 | /* The die_type call above may have already set the type for this DIE. */ | |
17199 | cv_type = get_die_type (die, cu); | |
17200 | if (cv_type) | |
17201 | return cv_type; | |
17202 | ||
17203 | cv_type = make_atomic_type (base_type); | |
17204 | return set_die_type (die, cv_type, cu); | |
17205 | } | |
17206 | ||
c906108c SS |
17207 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17208 | the user defined type vector. It isn't really a user defined type, | |
17209 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17210 | attribute to reference it. */ | |
17211 | ||
f792889a | 17212 | static struct type * |
e7c27a73 | 17213 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17214 | { |
518817b3 | 17215 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 17216 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
17217 | struct type *type, *range_type, *index_type, *char_type; |
17218 | struct attribute *attr; | |
17219 | unsigned int length; | |
17220 | ||
e142c38c | 17221 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
17222 | if (attr) |
17223 | { | |
17224 | length = DW_UNSND (attr); | |
17225 | } | |
17226 | else | |
17227 | { | |
0963b4bd | 17228 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 17229 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
17230 | if (attr) |
17231 | { | |
17232 | length = DW_UNSND (attr); | |
17233 | } | |
17234 | else | |
17235 | { | |
17236 | length = 1; | |
17237 | } | |
c906108c | 17238 | } |
6ccb9162 | 17239 | |
46bf5051 | 17240 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 17241 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
17242 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17243 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17244 | |
f792889a | 17245 | return set_die_type (die, type, cu); |
c906108c SS |
17246 | } |
17247 | ||
4d804846 JB |
17248 | /* Assuming that DIE corresponds to a function, returns nonzero |
17249 | if the function is prototyped. */ | |
17250 | ||
17251 | static int | |
17252 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17253 | { | |
17254 | struct attribute *attr; | |
17255 | ||
17256 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
17257 | if (attr && (DW_UNSND (attr) != 0)) | |
17258 | return 1; | |
17259 | ||
17260 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
17261 | is only meaninful for C, but the concept also extends to other | |
17262 | languages that allow unprototyped functions (Eg: Objective C). | |
17263 | For all other languages, assume that functions are always | |
17264 | prototyped. */ | |
17265 | if (cu->language != language_c | |
17266 | && cu->language != language_objc | |
17267 | && cu->language != language_opencl) | |
17268 | return 1; | |
17269 | ||
17270 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17271 | prototyped and unprototyped functions; default to prototyped, | |
17272 | since that is more common in modern code (and RealView warns | |
17273 | about unprototyped functions). */ | |
17274 | if (producer_is_realview (cu->producer)) | |
17275 | return 1; | |
17276 | ||
17277 | return 0; | |
17278 | } | |
17279 | ||
c906108c SS |
17280 | /* Handle DIES due to C code like: |
17281 | ||
17282 | struct foo | |
c5aa993b JM |
17283 | { |
17284 | int (*funcp)(int a, long l); | |
17285 | int b; | |
17286 | }; | |
c906108c | 17287 | |
0963b4bd | 17288 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17289 | |
f792889a | 17290 | static struct type * |
e7c27a73 | 17291 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17292 | { |
518817b3 | 17293 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
17294 | struct type *type; /* Type that this function returns. */ |
17295 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17296 | struct attribute *attr; |
17297 | ||
e7c27a73 | 17298 | type = die_type (die, cu); |
7e314c57 JK |
17299 | |
17300 | /* The die_type call above may have already set the type for this DIE. */ | |
17301 | ftype = get_die_type (die, cu); | |
17302 | if (ftype) | |
17303 | return ftype; | |
17304 | ||
0c8b41f1 | 17305 | ftype = lookup_function_type (type); |
c906108c | 17306 | |
4d804846 | 17307 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17308 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17309 | |
c055b101 CV |
17310 | /* Store the calling convention in the type if it's available in |
17311 | the subroutine die. Otherwise set the calling convention to | |
17312 | the default value DW_CC_normal. */ | |
17313 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
17314 | if (attr) |
17315 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
17316 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
17317 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17318 | else | |
17319 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17320 | |
743649fd MW |
17321 | /* Record whether the function returns normally to its caller or not |
17322 | if the DWARF producer set that information. */ | |
17323 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17324 | if (attr && (DW_UNSND (attr) != 0)) | |
17325 | TYPE_NO_RETURN (ftype) = 1; | |
17326 | ||
76c10ea2 GM |
17327 | /* We need to add the subroutine type to the die immediately so |
17328 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17329 | declared as the same subroutine type. */ |
76c10ea2 | 17330 | set_die_type (die, ftype, cu); |
6e70227d | 17331 | |
639d11d3 | 17332 | if (die->child != NULL) |
c906108c | 17333 | { |
bb5ed363 | 17334 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17335 | struct die_info *child_die; |
8072405b | 17336 | int nparams, iparams; |
c906108c SS |
17337 | |
17338 | /* Count the number of parameters. | |
17339 | FIXME: GDB currently ignores vararg functions, but knows about | |
17340 | vararg member functions. */ | |
8072405b | 17341 | nparams = 0; |
639d11d3 | 17342 | child_die = die->child; |
c906108c SS |
17343 | while (child_die && child_die->tag) |
17344 | { | |
17345 | if (child_die->tag == DW_TAG_formal_parameter) | |
17346 | nparams++; | |
17347 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17348 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
17349 | child_die = sibling_die (child_die); |
17350 | } | |
17351 | ||
17352 | /* Allocate storage for parameters and fill them in. */ | |
17353 | TYPE_NFIELDS (ftype) = nparams; | |
17354 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17355 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17356 | |
8072405b JK |
17357 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17358 | even if we error out during the parameters reading below. */ | |
17359 | for (iparams = 0; iparams < nparams; iparams++) | |
17360 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17361 | ||
17362 | iparams = 0; | |
639d11d3 | 17363 | child_die = die->child; |
c906108c SS |
17364 | while (child_die && child_die->tag) |
17365 | { | |
17366 | if (child_die->tag == DW_TAG_formal_parameter) | |
17367 | { | |
3ce3b1ba PA |
17368 | struct type *arg_type; |
17369 | ||
17370 | /* DWARF version 2 has no clean way to discern C++ | |
17371 | static and non-static member functions. G++ helps | |
17372 | GDB by marking the first parameter for non-static | |
17373 | member functions (which is the this pointer) as | |
17374 | artificial. We pass this information to | |
17375 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17376 | ||
17377 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17378 | 4.5 does not yet generate. */ | |
e142c38c | 17379 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
17380 | if (attr) |
17381 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
17382 | else | |
9c37b5ae | 17383 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17384 | arg_type = die_type (child_die, cu); |
17385 | ||
17386 | /* RealView does not mark THIS as const, which the testsuite | |
17387 | expects. GCC marks THIS as const in method definitions, | |
17388 | but not in the class specifications (GCC PR 43053). */ | |
17389 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17390 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17391 | { | |
17392 | int is_this = 0; | |
17393 | struct dwarf2_cu *arg_cu = cu; | |
17394 | const char *name = dwarf2_name (child_die, cu); | |
17395 | ||
17396 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
17397 | if (attr) | |
17398 | { | |
17399 | /* If the compiler emits this, use it. */ | |
17400 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17401 | is_this = 1; | |
17402 | } | |
17403 | else if (name && strcmp (name, "this") == 0) | |
17404 | /* Function definitions will have the argument names. */ | |
17405 | is_this = 1; | |
17406 | else if (name == NULL && iparams == 0) | |
17407 | /* Declarations may not have the names, so like | |
17408 | elsewhere in GDB, assume an artificial first | |
17409 | argument is "this". */ | |
17410 | is_this = 1; | |
17411 | ||
17412 | if (is_this) | |
17413 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17414 | arg_type, 0); | |
17415 | } | |
17416 | ||
17417 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17418 | iparams++; |
17419 | } | |
17420 | child_die = sibling_die (child_die); | |
17421 | } | |
17422 | } | |
17423 | ||
76c10ea2 | 17424 | return ftype; |
c906108c SS |
17425 | } |
17426 | ||
f792889a | 17427 | static struct type * |
e7c27a73 | 17428 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17429 | { |
518817b3 | 17430 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17431 | const char *name = NULL; |
3c8e0968 | 17432 | struct type *this_type, *target_type; |
c906108c | 17433 | |
94af9270 | 17434 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17435 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17436 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17437 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17438 | target_type = die_type (die, cu); |
17439 | if (target_type != this_type) | |
17440 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17441 | else | |
17442 | { | |
17443 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17444 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17445 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17446 | "- DIE at %s [in module %s]"), |
17447 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17448 | TYPE_TARGET_TYPE (this_type) = NULL; |
17449 | } | |
f792889a | 17450 | return this_type; |
c906108c SS |
17451 | } |
17452 | ||
9b790ce7 UW |
17453 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17454 | (which may be different from NAME) to the architecture back-end to allow | |
17455 | it to guess the correct format if necessary. */ | |
17456 | ||
17457 | static struct type * | |
17458 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
17459 | const char *name_hint) | |
17460 | { | |
17461 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17462 | const struct floatformat **format; | |
17463 | struct type *type; | |
17464 | ||
17465 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17466 | if (format) | |
17467 | type = init_float_type (objfile, bits, name, format); | |
17468 | else | |
77b7c781 | 17469 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17470 | |
17471 | return type; | |
17472 | } | |
17473 | ||
eb77c9df AB |
17474 | /* Allocate an integer type of size BITS and name NAME. */ |
17475 | ||
17476 | static struct type * | |
17477 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17478 | int bits, int unsigned_p, const char *name) | |
17479 | { | |
17480 | struct type *type; | |
17481 | ||
17482 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17483 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17484 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17485 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17486 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17487 | type = objfile_type (objfile)->builtin_void; |
17488 | else | |
17489 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17490 | ||
17491 | return type; | |
17492 | } | |
17493 | ||
8bdc1658 AB |
17494 | /* Initialise and return a floating point type of size BITS suitable for |
17495 | use as a component of a complex number. The NAME_HINT is passed through | |
17496 | when initialising the floating point type and is the name of the complex | |
17497 | type. | |
17498 | ||
17499 | As DWARF doesn't currently provide an explicit name for the components | |
17500 | of a complex number, but it can be helpful to have these components | |
17501 | named, we try to select a suitable name based on the size of the | |
17502 | component. */ | |
17503 | static struct type * | |
17504 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17505 | struct objfile *objfile, | |
17506 | int bits, const char *name_hint) | |
17507 | { | |
17508 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
17509 | struct type *tt = nullptr; | |
17510 | ||
35add35e AB |
17511 | /* Try to find a suitable floating point builtin type of size BITS. |
17512 | We're going to use the name of this type as the name for the complex | |
17513 | target type that we are about to create. */ | |
1db455a7 | 17514 | switch (cu->language) |
8bdc1658 | 17515 | { |
1db455a7 AB |
17516 | case language_fortran: |
17517 | switch (bits) | |
17518 | { | |
17519 | case 32: | |
17520 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17521 | break; | |
17522 | case 64: | |
17523 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17524 | break; | |
17525 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17526 | case 128: | |
17527 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17528 | break; | |
17529 | } | |
8bdc1658 | 17530 | break; |
1db455a7 AB |
17531 | default: |
17532 | switch (bits) | |
17533 | { | |
17534 | case 32: | |
17535 | tt = builtin_type (gdbarch)->builtin_float; | |
17536 | break; | |
17537 | case 64: | |
17538 | tt = builtin_type (gdbarch)->builtin_double; | |
17539 | break; | |
17540 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17541 | case 128: | |
17542 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17543 | break; | |
17544 | } | |
8bdc1658 AB |
17545 | break; |
17546 | } | |
17547 | ||
35add35e AB |
17548 | /* If the type we found doesn't match the size we were looking for, then |
17549 | pretend we didn't find a type at all, the complex target type we | |
17550 | create will then be nameless. */ | |
a12e5744 | 17551 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17552 | tt = nullptr; |
17553 | ||
8bdc1658 AB |
17554 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
17555 | return dwarf2_init_float_type (objfile, bits, name, name_hint); | |
17556 | } | |
17557 | ||
c906108c SS |
17558 | /* Find a representation of a given base type and install |
17559 | it in the TYPE field of the die. */ | |
17560 | ||
f792889a | 17561 | static struct type * |
e7c27a73 | 17562 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17563 | { |
518817b3 | 17564 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
17565 | struct type *type; |
17566 | struct attribute *attr; | |
19f392bc | 17567 | int encoding = 0, bits = 0; |
15d034d0 | 17568 | const char *name; |
c906108c | 17569 | |
e142c38c | 17570 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
17571 | if (attr) |
17572 | { | |
17573 | encoding = DW_UNSND (attr); | |
17574 | } | |
e142c38c | 17575 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
17576 | if (attr) |
17577 | { | |
19f392bc | 17578 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 17579 | } |
39cbfefa | 17580 | name = dwarf2_name (die, cu); |
6ccb9162 | 17581 | if (!name) |
c906108c | 17582 | { |
b98664d3 | 17583 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
c906108c | 17584 | } |
6ccb9162 UW |
17585 | |
17586 | switch (encoding) | |
c906108c | 17587 | { |
6ccb9162 UW |
17588 | case DW_ATE_address: |
17589 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17590 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17591 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17592 | break; |
17593 | case DW_ATE_boolean: | |
19f392bc | 17594 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17595 | break; |
17596 | case DW_ATE_complex_float: | |
8bdc1658 | 17597 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name); |
19f392bc | 17598 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
17599 | break; |
17600 | case DW_ATE_decimal_float: | |
19f392bc | 17601 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17602 | break; |
17603 | case DW_ATE_float: | |
9b790ce7 | 17604 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
17605 | break; |
17606 | case DW_ATE_signed: | |
eb77c9df | 17607 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17608 | break; |
17609 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17610 | if (cu->language == language_fortran |
17611 | && name | |
61012eef | 17612 | && startswith (name, "character(")) |
19f392bc UW |
17613 | type = init_character_type (objfile, bits, 1, name); |
17614 | else | |
eb77c9df | 17615 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17616 | break; |
17617 | case DW_ATE_signed_char: | |
6e70227d | 17618 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17619 | || cu->language == language_pascal |
17620 | || cu->language == language_fortran) | |
19f392bc UW |
17621 | type = init_character_type (objfile, bits, 0, name); |
17622 | else | |
eb77c9df | 17623 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17624 | break; |
17625 | case DW_ATE_unsigned_char: | |
868a0084 | 17626 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17627 | || cu->language == language_pascal |
c44af4eb TT |
17628 | || cu->language == language_fortran |
17629 | || cu->language == language_rust) | |
19f392bc UW |
17630 | type = init_character_type (objfile, bits, 1, name); |
17631 | else | |
eb77c9df | 17632 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17633 | break; |
75079b2b | 17634 | case DW_ATE_UTF: |
53e710ac PA |
17635 | { |
17636 | gdbarch *arch = get_objfile_arch (objfile); | |
17637 | ||
17638 | if (bits == 16) | |
17639 | type = builtin_type (arch)->builtin_char16; | |
17640 | else if (bits == 32) | |
17641 | type = builtin_type (arch)->builtin_char32; | |
17642 | else | |
17643 | { | |
b98664d3 | 17644 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17645 | bits); |
eb77c9df | 17646 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17647 | } |
17648 | return set_die_type (die, type, cu); | |
17649 | } | |
75079b2b TT |
17650 | break; |
17651 | ||
6ccb9162 | 17652 | default: |
b98664d3 | 17653 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17654 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17655 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17656 | break; |
c906108c | 17657 | } |
6ccb9162 | 17658 | |
0114d602 | 17659 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17660 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17661 | |
2b4424c3 TT |
17662 | maybe_set_alignment (cu, die, type); |
17663 | ||
f792889a | 17664 | return set_die_type (die, type, cu); |
c906108c SS |
17665 | } |
17666 | ||
80180f79 SA |
17667 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17668 | resulting value of the attribute into struct bound_prop. | |
17669 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17670 | ||
17671 | static int | |
17672 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17673 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17674 | struct type *default_type) | |
80180f79 SA |
17675 | { |
17676 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17677 | struct obstack *obstack |
17678 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17679 | |
9a49df9d AB |
17680 | gdb_assert (default_type != NULL); |
17681 | ||
80180f79 SA |
17682 | if (attr == NULL || prop == NULL) |
17683 | return 0; | |
17684 | ||
17685 | if (attr_form_is_block (attr)) | |
17686 | { | |
8d749320 | 17687 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17688 | baton->property_type = default_type; |
80180f79 SA |
17689 | baton->locexpr.per_cu = cu->per_cu; |
17690 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17691 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
9a49df9d | 17692 | baton->locexpr.is_reference = false; |
80180f79 SA |
17693 | prop->data.baton = baton; |
17694 | prop->kind = PROP_LOCEXPR; | |
17695 | gdb_assert (prop->data.baton != NULL); | |
17696 | } | |
17697 | else if (attr_form_is_ref (attr)) | |
17698 | { | |
17699 | struct dwarf2_cu *target_cu = cu; | |
17700 | struct die_info *target_die; | |
17701 | struct attribute *target_attr; | |
17702 | ||
17703 | target_die = follow_die_ref (die, attr, &target_cu); | |
17704 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17705 | if (target_attr == NULL) |
17706 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17707 | target_cu); | |
80180f79 SA |
17708 | if (target_attr == NULL) |
17709 | return 0; | |
17710 | ||
df25ebbd | 17711 | switch (target_attr->name) |
80180f79 | 17712 | { |
df25ebbd JB |
17713 | case DW_AT_location: |
17714 | if (attr_form_is_section_offset (target_attr)) | |
17715 | { | |
8d749320 | 17716 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17717 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17718 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17719 | prop->data.baton = baton; | |
17720 | prop->kind = PROP_LOCLIST; | |
17721 | gdb_assert (prop->data.baton != NULL); | |
17722 | } | |
17723 | else if (attr_form_is_block (target_attr)) | |
17724 | { | |
8d749320 | 17725 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17726 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17727 | baton->locexpr.per_cu = cu->per_cu; |
17728 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17729 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17730 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17731 | prop->data.baton = baton; |
17732 | prop->kind = PROP_LOCEXPR; | |
17733 | gdb_assert (prop->data.baton != NULL); | |
17734 | } | |
17735 | else | |
17736 | { | |
17737 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17738 | "dynamic property"); | |
17739 | return 0; | |
17740 | } | |
17741 | break; | |
17742 | case DW_AT_data_member_location: | |
17743 | { | |
17744 | LONGEST offset; | |
17745 | ||
17746 | if (!handle_data_member_location (target_die, target_cu, | |
17747 | &offset)) | |
17748 | return 0; | |
17749 | ||
8d749320 | 17750 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17751 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17752 | target_cu); |
df25ebbd JB |
17753 | baton->offset_info.offset = offset; |
17754 | baton->offset_info.type = die_type (target_die, target_cu); | |
17755 | prop->data.baton = baton; | |
17756 | prop->kind = PROP_ADDR_OFFSET; | |
17757 | break; | |
17758 | } | |
80180f79 SA |
17759 | } |
17760 | } | |
17761 | else if (attr_form_is_constant (attr)) | |
17762 | { | |
17763 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17764 | prop->kind = PROP_CONST; | |
17765 | } | |
17766 | else | |
17767 | { | |
17768 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17769 | dwarf2_name (die, cu)); | |
17770 | return 0; | |
17771 | } | |
17772 | ||
17773 | return 1; | |
17774 | } | |
17775 | ||
9a49df9d AB |
17776 | /* Find an integer type the same size as the address size given in the |
17777 | compilation unit header for PER_CU. UNSIGNED_P controls if the integer | |
17778 | is unsigned or not. */ | |
17779 | ||
17780 | static struct type * | |
17781 | dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data *per_cu, | |
17782 | bool unsigned_p) | |
17783 | { | |
17784 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
17785 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
17786 | struct type *int_type; | |
17787 | ||
17788 | /* Helper macro to examine the various builtin types. */ | |
17789 | #define TRY_TYPE(F) \ | |
17790 | int_type = (unsigned_p \ | |
17791 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17792 | : objfile_type (objfile)->builtin_ ## F); \ | |
17793 | if (int_type != NULL && TYPE_LENGTH (int_type) == addr_size) \ | |
17794 | return int_type | |
17795 | ||
17796 | TRY_TYPE (char); | |
17797 | TRY_TYPE (short); | |
17798 | TRY_TYPE (int); | |
17799 | TRY_TYPE (long); | |
17800 | TRY_TYPE (long_long); | |
17801 | ||
17802 | #undef TRY_TYPE | |
17803 | ||
17804 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17805 | } | |
17806 | ||
b86352cf AB |
17807 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17808 | present (which is valid) then compute the default type based on the | |
17809 | compilation units address size. */ | |
17810 | ||
17811 | static struct type * | |
17812 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17813 | { | |
17814 | struct type *index_type = die_type (die, cu); | |
17815 | ||
17816 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17817 | without specifying a base type. | |
17818 | In that case, the base type must be set to the type of | |
17819 | the lower bound, upper bound or count, in that order, if any of these | |
17820 | three attributes references an object that has a type. | |
17821 | If no base type is found, the Dwarf-2 specifications say that | |
17822 | a signed integer type of size equal to the size of an address should | |
17823 | be used. | |
17824 | For the following C code: `extern char gdb_int [];' | |
17825 | GCC produces an empty range DIE. | |
17826 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17827 | high bound or count are not yet handled by this code. */ | |
17828 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
9a49df9d | 17829 | index_type = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); |
b86352cf AB |
17830 | |
17831 | return index_type; | |
17832 | } | |
17833 | ||
a02abb62 JB |
17834 | /* Read the given DW_AT_subrange DIE. */ |
17835 | ||
f792889a | 17836 | static struct type * |
a02abb62 JB |
17837 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17838 | { | |
4c9ad8c2 | 17839 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17840 | struct type *range_type; |
17841 | struct attribute *attr; | |
729efb13 | 17842 | struct dynamic_prop low, high; |
4fae6e18 | 17843 | int low_default_is_valid; |
c451ebe5 | 17844 | int high_bound_is_count = 0; |
15d034d0 | 17845 | const char *name; |
d359392f | 17846 | ULONGEST negative_mask; |
e77813c8 | 17847 | |
b86352cf AB |
17848 | orig_base_type = read_subrange_index_type (die, cu); |
17849 | ||
4c9ad8c2 TT |
17850 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17851 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17852 | creating the range type, but we use the result of check_typedef | |
17853 | when examining properties of the type. */ | |
17854 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17855 | |
7e314c57 JK |
17856 | /* The die_type call above may have already set the type for this DIE. */ |
17857 | range_type = get_die_type (die, cu); | |
17858 | if (range_type) | |
17859 | return range_type; | |
17860 | ||
729efb13 SA |
17861 | low.kind = PROP_CONST; |
17862 | high.kind = PROP_CONST; | |
17863 | high.data.const_val = 0; | |
17864 | ||
4fae6e18 JK |
17865 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17866 | omitting DW_AT_lower_bound. */ | |
17867 | switch (cu->language) | |
6e70227d | 17868 | { |
4fae6e18 JK |
17869 | case language_c: |
17870 | case language_cplus: | |
729efb13 | 17871 | low.data.const_val = 0; |
4fae6e18 JK |
17872 | low_default_is_valid = 1; |
17873 | break; | |
17874 | case language_fortran: | |
729efb13 | 17875 | low.data.const_val = 1; |
4fae6e18 JK |
17876 | low_default_is_valid = 1; |
17877 | break; | |
17878 | case language_d: | |
4fae6e18 | 17879 | case language_objc: |
c44af4eb | 17880 | case language_rust: |
729efb13 | 17881 | low.data.const_val = 0; |
4fae6e18 JK |
17882 | low_default_is_valid = (cu->header.version >= 4); |
17883 | break; | |
17884 | case language_ada: | |
17885 | case language_m2: | |
17886 | case language_pascal: | |
729efb13 | 17887 | low.data.const_val = 1; |
4fae6e18 JK |
17888 | low_default_is_valid = (cu->header.version >= 4); |
17889 | break; | |
17890 | default: | |
729efb13 | 17891 | low.data.const_val = 0; |
4fae6e18 JK |
17892 | low_default_is_valid = 0; |
17893 | break; | |
a02abb62 JB |
17894 | } |
17895 | ||
e142c38c | 17896 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 17897 | if (attr) |
9a49df9d | 17898 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17899 | else if (!low_default_is_valid) |
b98664d3 | 17900 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17901 | "- DIE at %s [in module %s]"), |
17902 | sect_offset_str (die->sect_off), | |
518817b3 | 17903 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17904 | |
506f5c41 TV |
17905 | struct attribute *attr_ub, *attr_count; |
17906 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17907 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17908 | { |
506f5c41 | 17909 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17910 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17911 | { |
c451ebe5 SA |
17912 | /* If bounds are constant do the final calculation here. */ |
17913 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17914 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17915 | else | |
17916 | high_bound_is_count = 1; | |
c2ff108b | 17917 | } |
506f5c41 TV |
17918 | else |
17919 | { | |
17920 | if (attr_ub != NULL) | |
17921 | complaint (_("Unresolved DW_AT_upper_bound " | |
17922 | "- DIE at %s [in module %s]"), | |
17923 | sect_offset_str (die->sect_off), | |
17924 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17925 | if (attr_count != NULL) | |
17926 | complaint (_("Unresolved DW_AT_count " | |
17927 | "- DIE at %s [in module %s]"), | |
17928 | sect_offset_str (die->sect_off), | |
17929 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17930 | } | |
e77813c8 | 17931 | } |
a02abb62 | 17932 | |
4e962e74 TT |
17933 | LONGEST bias = 0; |
17934 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
17935 | if (bias_attr != nullptr && attr_form_is_constant (bias_attr)) | |
17936 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); | |
17937 | ||
dbb9c2b1 JB |
17938 | /* Normally, the DWARF producers are expected to use a signed |
17939 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17940 | But this is unfortunately not always the case, as witnessed | |
17941 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17942 | is used instead. To work around that ambiguity, we treat | |
17943 | the bounds as signed, and thus sign-extend their values, when | |
17944 | the base type is signed. */ | |
6e70227d | 17945 | negative_mask = |
d359392f | 17946 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17947 | if (low.kind == PROP_CONST |
17948 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17949 | low.data.const_val |= negative_mask; | |
17950 | if (high.kind == PROP_CONST | |
17951 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17952 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17953 | |
4e962e74 | 17954 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); |
a02abb62 | 17955 | |
c451ebe5 SA |
17956 | if (high_bound_is_count) |
17957 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17958 | ||
c2ff108b JK |
17959 | /* Ada expects an empty array on no boundary attributes. */ |
17960 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17961 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17962 | |
39cbfefa DJ |
17963 | name = dwarf2_name (die, cu); |
17964 | if (name) | |
17965 | TYPE_NAME (range_type) = name; | |
6e70227d | 17966 | |
e142c38c | 17967 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
17968 | if (attr) |
17969 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
17970 | ||
2b4424c3 TT |
17971 | maybe_set_alignment (cu, die, range_type); |
17972 | ||
7e314c57 JK |
17973 | set_die_type (die, range_type, cu); |
17974 | ||
17975 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17976 | set_descriptive_type (range_type, die, cu); |
17977 | ||
7e314c57 | 17978 | return range_type; |
a02abb62 | 17979 | } |
6e70227d | 17980 | |
f792889a | 17981 | static struct type * |
81a17f79 JB |
17982 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17983 | { | |
17984 | struct type *type; | |
81a17f79 | 17985 | |
518817b3 SM |
17986 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17987 | NULL); | |
0114d602 | 17988 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17989 | |
74a2f8ff JB |
17990 | /* In Ada, an unspecified type is typically used when the description |
17991 | of the type is defered to a different unit. When encountering | |
17992 | such a type, we treat it as a stub, and try to resolve it later on, | |
17993 | when needed. */ | |
17994 | if (cu->language == language_ada) | |
17995 | TYPE_STUB (type) = 1; | |
17996 | ||
f792889a | 17997 | return set_die_type (die, type, cu); |
81a17f79 | 17998 | } |
a02abb62 | 17999 | |
639d11d3 DC |
18000 | /* Read a single die and all its descendents. Set the die's sibling |
18001 | field to NULL; set other fields in the die correctly, and set all | |
18002 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
18003 | location of the info_ptr after reading all of those dies. PARENT | |
18004 | is the parent of the die in question. */ | |
18005 | ||
18006 | static struct die_info * | |
dee91e82 | 18007 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
18008 | const gdb_byte *info_ptr, |
18009 | const gdb_byte **new_info_ptr, | |
dee91e82 | 18010 | struct die_info *parent) |
639d11d3 DC |
18011 | { |
18012 | struct die_info *die; | |
d521ce57 | 18013 | const gdb_byte *cur_ptr; |
639d11d3 DC |
18014 | int has_children; |
18015 | ||
bf6af496 | 18016 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
18017 | if (die == NULL) |
18018 | { | |
18019 | *new_info_ptr = cur_ptr; | |
18020 | return NULL; | |
18021 | } | |
93311388 | 18022 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
18023 | |
18024 | if (has_children) | |
bf6af496 | 18025 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
18026 | else |
18027 | { | |
18028 | die->child = NULL; | |
18029 | *new_info_ptr = cur_ptr; | |
18030 | } | |
18031 | ||
18032 | die->sibling = NULL; | |
18033 | die->parent = parent; | |
18034 | return die; | |
18035 | } | |
18036 | ||
18037 | /* Read a die, all of its descendents, and all of its siblings; set | |
18038 | all of the fields of all of the dies correctly. Arguments are as | |
18039 | in read_die_and_children. */ | |
18040 | ||
18041 | static struct die_info * | |
bf6af496 | 18042 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
18043 | const gdb_byte *info_ptr, |
18044 | const gdb_byte **new_info_ptr, | |
bf6af496 | 18045 | struct die_info *parent) |
639d11d3 DC |
18046 | { |
18047 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 18048 | const gdb_byte *cur_ptr; |
639d11d3 | 18049 | |
c906108c | 18050 | cur_ptr = info_ptr; |
639d11d3 DC |
18051 | first_die = last_sibling = NULL; |
18052 | ||
18053 | while (1) | |
c906108c | 18054 | { |
639d11d3 | 18055 | struct die_info *die |
dee91e82 | 18056 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 18057 | |
1d325ec1 | 18058 | if (die == NULL) |
c906108c | 18059 | { |
639d11d3 DC |
18060 | *new_info_ptr = cur_ptr; |
18061 | return first_die; | |
c906108c | 18062 | } |
1d325ec1 DJ |
18063 | |
18064 | if (!first_die) | |
18065 | first_die = die; | |
c906108c | 18066 | else |
1d325ec1 DJ |
18067 | last_sibling->sibling = die; |
18068 | ||
18069 | last_sibling = die; | |
c906108c | 18070 | } |
c906108c SS |
18071 | } |
18072 | ||
bf6af496 DE |
18073 | /* Read a die, all of its descendents, and all of its siblings; set |
18074 | all of the fields of all of the dies correctly. Arguments are as | |
18075 | in read_die_and_children. | |
18076 | This the main entry point for reading a DIE and all its children. */ | |
18077 | ||
18078 | static struct die_info * | |
18079 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
18080 | const gdb_byte *info_ptr, |
18081 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
18082 | struct die_info *parent) |
18083 | { | |
18084 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
18085 | new_info_ptr, parent); | |
18086 | ||
b4f54984 | 18087 | if (dwarf_die_debug) |
bf6af496 DE |
18088 | { |
18089 | fprintf_unfiltered (gdb_stdlog, | |
18090 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18091 | get_section_name (reader->die_section), |
bf6af496 DE |
18092 | (unsigned) (info_ptr - reader->die_section->buffer), |
18093 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18094 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
18095 | } |
18096 | ||
18097 | return die; | |
18098 | } | |
18099 | ||
3019eac3 DE |
18100 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
18101 | attributes. | |
18102 | The caller is responsible for filling in the extra attributes | |
18103 | and updating (*DIEP)->num_attrs. | |
18104 | Set DIEP to point to a newly allocated die with its information, | |
18105 | except for its child, sibling, and parent fields. | |
18106 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 18107 | |
d521ce57 | 18108 | static const gdb_byte * |
3019eac3 | 18109 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 18110 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 18111 | int *has_children, int num_extra_attrs) |
93311388 | 18112 | { |
b64f50a1 | 18113 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
18114 | struct abbrev_info *abbrev; |
18115 | struct die_info *die; | |
18116 | struct dwarf2_cu *cu = reader->cu; | |
18117 | bfd *abfd = reader->abfd; | |
18118 | ||
9c541725 | 18119 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
18120 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18121 | info_ptr += bytes_read; | |
18122 | if (!abbrev_number) | |
18123 | { | |
18124 | *diep = NULL; | |
18125 | *has_children = 0; | |
18126 | return info_ptr; | |
18127 | } | |
18128 | ||
685af9cd | 18129 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 18130 | if (!abbrev) |
348e048f DE |
18131 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
18132 | abbrev_number, | |
18133 | bfd_get_filename (abfd)); | |
18134 | ||
3019eac3 | 18135 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 18136 | die->sect_off = sect_off; |
93311388 DE |
18137 | die->tag = abbrev->tag; |
18138 | die->abbrev = abbrev_number; | |
18139 | ||
3019eac3 DE |
18140 | /* Make the result usable. |
18141 | The caller needs to update num_attrs after adding the extra | |
18142 | attributes. */ | |
93311388 DE |
18143 | die->num_attrs = abbrev->num_attrs; |
18144 | ||
18145 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
18146 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
18147 | info_ptr); | |
93311388 DE |
18148 | |
18149 | *diep = die; | |
18150 | *has_children = abbrev->has_children; | |
18151 | return info_ptr; | |
18152 | } | |
18153 | ||
3019eac3 DE |
18154 | /* Read a die and all its attributes. |
18155 | Set DIEP to point to a newly allocated die with its information, | |
18156 | except for its child, sibling, and parent fields. | |
18157 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
18158 | ||
d521ce57 | 18159 | static const gdb_byte * |
3019eac3 | 18160 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 18161 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
18162 | int *has_children) |
18163 | { | |
d521ce57 | 18164 | const gdb_byte *result; |
bf6af496 DE |
18165 | |
18166 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
18167 | ||
b4f54984 | 18168 | if (dwarf_die_debug) |
bf6af496 DE |
18169 | { |
18170 | fprintf_unfiltered (gdb_stdlog, | |
18171 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18172 | get_section_name (reader->die_section), |
bf6af496 DE |
18173 | (unsigned) (info_ptr - reader->die_section->buffer), |
18174 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18175 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
18176 | } |
18177 | ||
18178 | return result; | |
3019eac3 | 18179 | } |
433df2d4 DE |
18180 | \f |
18181 | /* Abbreviation tables. | |
3019eac3 | 18182 | |
433df2d4 | 18183 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
18184 | stored in a separate .debug_abbrev section. Before we read any |
18185 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
18186 | in a hash table. */ |
18187 | ||
18188 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
18189 | ||
685af9cd TT |
18190 | struct abbrev_info * |
18191 | abbrev_table::alloc_abbrev () | |
433df2d4 DE |
18192 | { |
18193 | struct abbrev_info *abbrev; | |
18194 | ||
685af9cd | 18195 | abbrev = XOBNEW (&abbrev_obstack, struct abbrev_info); |
433df2d4 | 18196 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 18197 | |
433df2d4 DE |
18198 | return abbrev; |
18199 | } | |
18200 | ||
18201 | /* Add an abbreviation to the table. */ | |
c906108c | 18202 | |
685af9cd TT |
18203 | void |
18204 | abbrev_table::add_abbrev (unsigned int abbrev_number, | |
18205 | struct abbrev_info *abbrev) | |
433df2d4 DE |
18206 | { |
18207 | unsigned int hash_number; | |
18208 | ||
18209 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 YQ |
18210 | abbrev->next = m_abbrevs[hash_number]; |
18211 | m_abbrevs[hash_number] = abbrev; | |
433df2d4 | 18212 | } |
dee91e82 | 18213 | |
433df2d4 DE |
18214 | /* Look up an abbrev in the table. |
18215 | Returns NULL if the abbrev is not found. */ | |
18216 | ||
685af9cd TT |
18217 | struct abbrev_info * |
18218 | abbrev_table::lookup_abbrev (unsigned int abbrev_number) | |
c906108c | 18219 | { |
433df2d4 DE |
18220 | unsigned int hash_number; |
18221 | struct abbrev_info *abbrev; | |
18222 | ||
18223 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 | 18224 | abbrev = m_abbrevs[hash_number]; |
433df2d4 DE |
18225 | |
18226 | while (abbrev) | |
18227 | { | |
18228 | if (abbrev->number == abbrev_number) | |
18229 | return abbrev; | |
18230 | abbrev = abbrev->next; | |
18231 | } | |
18232 | return NULL; | |
18233 | } | |
18234 | ||
18235 | /* Read in an abbrev table. */ | |
18236 | ||
685af9cd | 18237 | static abbrev_table_up |
ed2dc618 SM |
18238 | abbrev_table_read_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18239 | struct dwarf2_section_info *section, | |
9c541725 | 18240 | sect_offset sect_off) |
433df2d4 DE |
18241 | { |
18242 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 18243 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 18244 | const gdb_byte *abbrev_ptr; |
c906108c SS |
18245 | struct abbrev_info *cur_abbrev; |
18246 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 18247 | unsigned int abbrev_form; |
f3dd6933 DJ |
18248 | struct attr_abbrev *cur_attrs; |
18249 | unsigned int allocated_attrs; | |
c906108c | 18250 | |
685af9cd | 18251 | abbrev_table_up abbrev_table (new struct abbrev_table (sect_off)); |
c906108c | 18252 | |
433df2d4 | 18253 | dwarf2_read_section (objfile, section); |
9c541725 | 18254 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
18255 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18256 | abbrev_ptr += bytes_read; | |
18257 | ||
f3dd6933 | 18258 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 18259 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 18260 | |
0963b4bd | 18261 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
18262 | while (abbrev_number) |
18263 | { | |
685af9cd | 18264 | cur_abbrev = abbrev_table->alloc_abbrev (); |
c906108c SS |
18265 | |
18266 | /* read in abbrev header */ | |
18267 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
18268 | cur_abbrev->tag |
18269 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
18270 | abbrev_ptr += bytes_read; |
18271 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
18272 | abbrev_ptr += 1; | |
18273 | ||
18274 | /* now read in declarations */ | |
22d2f3ab | 18275 | for (;;) |
c906108c | 18276 | { |
43988095 JK |
18277 | LONGEST implicit_const; |
18278 | ||
22d2f3ab JK |
18279 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18280 | abbrev_ptr += bytes_read; | |
18281 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18282 | abbrev_ptr += bytes_read; | |
43988095 JK |
18283 | if (abbrev_form == DW_FORM_implicit_const) |
18284 | { | |
18285 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
18286 | &bytes_read); | |
18287 | abbrev_ptr += bytes_read; | |
18288 | } | |
18289 | else | |
18290 | { | |
18291 | /* Initialize it due to a false compiler warning. */ | |
18292 | implicit_const = -1; | |
18293 | } | |
22d2f3ab JK |
18294 | |
18295 | if (abbrev_name == 0) | |
18296 | break; | |
18297 | ||
f3dd6933 | 18298 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 18299 | { |
f3dd6933 DJ |
18300 | allocated_attrs += ATTR_ALLOC_CHUNK; |
18301 | cur_attrs | |
224c3ddb | 18302 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 18303 | } |
ae038cb0 | 18304 | |
aead7601 SM |
18305 | cur_attrs[cur_abbrev->num_attrs].name |
18306 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 18307 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 18308 | = (enum dwarf_form) abbrev_form; |
43988095 | 18309 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 18310 | ++cur_abbrev->num_attrs; |
c906108c SS |
18311 | } |
18312 | ||
8d749320 SM |
18313 | cur_abbrev->attrs = |
18314 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
18315 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
18316 | memcpy (cur_abbrev->attrs, cur_attrs, |
18317 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
18318 | ||
685af9cd | 18319 | abbrev_table->add_abbrev (abbrev_number, cur_abbrev); |
c906108c SS |
18320 | |
18321 | /* Get next abbreviation. | |
18322 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
18323 | always properly terminated with an abbrev number of 0. |
18324 | Exit loop if we encounter an abbreviation which we have | |
18325 | already read (which means we are about to read the abbreviations | |
18326 | for the next compile unit) or if the end of the abbreviation | |
18327 | table is reached. */ | |
433df2d4 | 18328 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
18329 | break; |
18330 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18331 | abbrev_ptr += bytes_read; | |
685af9cd | 18332 | if (abbrev_table->lookup_abbrev (abbrev_number) != NULL) |
c906108c SS |
18333 | break; |
18334 | } | |
f3dd6933 DJ |
18335 | |
18336 | xfree (cur_attrs); | |
433df2d4 | 18337 | return abbrev_table; |
c906108c SS |
18338 | } |
18339 | ||
72bf9492 DJ |
18340 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18341 | symbol for. */ | |
18342 | ||
18343 | static int | |
18344 | is_type_tag_for_partial (int tag) | |
18345 | { | |
18346 | switch (tag) | |
18347 | { | |
18348 | #if 0 | |
18349 | /* Some types that would be reasonable to generate partial symbols for, | |
18350 | that we don't at present. */ | |
18351 | case DW_TAG_array_type: | |
18352 | case DW_TAG_file_type: | |
18353 | case DW_TAG_ptr_to_member_type: | |
18354 | case DW_TAG_set_type: | |
18355 | case DW_TAG_string_type: | |
18356 | case DW_TAG_subroutine_type: | |
18357 | #endif | |
18358 | case DW_TAG_base_type: | |
18359 | case DW_TAG_class_type: | |
680b30c7 | 18360 | case DW_TAG_interface_type: |
72bf9492 DJ |
18361 | case DW_TAG_enumeration_type: |
18362 | case DW_TAG_structure_type: | |
18363 | case DW_TAG_subrange_type: | |
18364 | case DW_TAG_typedef: | |
18365 | case DW_TAG_union_type: | |
18366 | return 1; | |
18367 | default: | |
18368 | return 0; | |
18369 | } | |
18370 | } | |
18371 | ||
18372 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18373 | ||
18374 | static struct partial_die_info * | |
dee91e82 | 18375 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18376 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18377 | { |
dee91e82 | 18378 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 18379 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 18380 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18381 | unsigned int bytes_read; |
5afb4e99 | 18382 | unsigned int load_all = 0; |
72bf9492 DJ |
18383 | int nesting_level = 1; |
18384 | ||
18385 | parent_die = NULL; | |
18386 | last_die = NULL; | |
18387 | ||
7adf1e79 DE |
18388 | gdb_assert (cu->per_cu != NULL); |
18389 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18390 | load_all = 1; |
18391 | ||
72bf9492 DJ |
18392 | cu->partial_dies |
18393 | = htab_create_alloc_ex (cu->header.length / 12, | |
18394 | partial_die_hash, | |
18395 | partial_die_eq, | |
18396 | NULL, | |
18397 | &cu->comp_unit_obstack, | |
18398 | hashtab_obstack_allocate, | |
18399 | dummy_obstack_deallocate); | |
18400 | ||
72bf9492 DJ |
18401 | while (1) |
18402 | { | |
685af9cd | 18403 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
18404 | |
18405 | /* A NULL abbrev means the end of a series of children. */ | |
18406 | if (abbrev == NULL) | |
18407 | { | |
18408 | if (--nesting_level == 0) | |
cd9983dd YQ |
18409 | return first_die; |
18410 | ||
72bf9492 DJ |
18411 | info_ptr += bytes_read; |
18412 | last_die = parent_die; | |
18413 | parent_die = parent_die->die_parent; | |
18414 | continue; | |
18415 | } | |
18416 | ||
98bfdba5 PA |
18417 | /* Check for template arguments. We never save these; if |
18418 | they're seen, we just mark the parent, and go on our way. */ | |
18419 | if (parent_die != NULL | |
18420 | && cu->language == language_cplus | |
18421 | && (abbrev->tag == DW_TAG_template_type_param | |
18422 | || abbrev->tag == DW_TAG_template_value_param)) | |
18423 | { | |
18424 | parent_die->has_template_arguments = 1; | |
18425 | ||
18426 | if (!load_all) | |
18427 | { | |
18428 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18429 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18430 | continue; |
18431 | } | |
18432 | } | |
18433 | ||
0d99eb77 | 18434 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18435 | Skip their other children. */ |
18436 | if (!load_all | |
18437 | && cu->language == language_cplus | |
18438 | && parent_die != NULL | |
18439 | && parent_die->tag == DW_TAG_subprogram) | |
18440 | { | |
dee91e82 | 18441 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18442 | continue; |
18443 | } | |
18444 | ||
5afb4e99 DJ |
18445 | /* Check whether this DIE is interesting enough to save. Normally |
18446 | we would not be interested in members here, but there may be | |
18447 | later variables referencing them via DW_AT_specification (for | |
18448 | static members). */ | |
18449 | if (!load_all | |
18450 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18451 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18452 | && abbrev->tag != DW_TAG_enumerator |
18453 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18454 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18455 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18456 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18457 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18458 | && abbrev->tag != DW_TAG_module |
95554aad | 18459 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18460 | && abbrev->tag != DW_TAG_imported_unit |
18461 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18462 | { |
18463 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18464 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18465 | continue; |
18466 | } | |
18467 | ||
6f06d47b YQ |
18468 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18469 | abbrev); | |
cd9983dd | 18470 | |
48fbe735 | 18471 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18472 | |
18473 | /* This two-pass algorithm for processing partial symbols has a | |
18474 | high cost in cache pressure. Thus, handle some simple cases | |
18475 | here which cover the majority of C partial symbols. DIEs | |
18476 | which neither have specification tags in them, nor could have | |
18477 | specification tags elsewhere pointing at them, can simply be | |
18478 | processed and discarded. | |
18479 | ||
18480 | This segment is also optional; scan_partial_symbols and | |
18481 | add_partial_symbol will handle these DIEs if we chain | |
18482 | them in normally. When compilers which do not emit large | |
18483 | quantities of duplicate debug information are more common, | |
18484 | this code can probably be removed. */ | |
18485 | ||
18486 | /* Any complete simple types at the top level (pretty much all | |
18487 | of them, for a language without namespaces), can be processed | |
18488 | directly. */ | |
18489 | if (parent_die == NULL | |
cd9983dd YQ |
18490 | && pdi.has_specification == 0 |
18491 | && pdi.is_declaration == 0 | |
18492 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18493 | || pdi.tag == DW_TAG_base_type | |
18494 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 18495 | { |
cd9983dd YQ |
18496 | if (building_psymtab && pdi.name != NULL) |
18497 | add_psymbol_to_list (pdi.name, strlen (pdi.name), 0, | |
79748972 | 18498 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 18499 | psymbol_placement::STATIC, |
1762568f | 18500 | 0, cu->language, objfile); |
cd9983dd | 18501 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18502 | continue; |
18503 | } | |
18504 | ||
d8228535 JK |
18505 | /* The exception for DW_TAG_typedef with has_children above is |
18506 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18507 | type_name_or_error will error on such types later. |
d8228535 JK |
18508 | |
18509 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18510 | it could not find the child DIEs referenced later, this is checked | |
18511 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18512 | ||
cd9983dd | 18513 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18514 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18515 | "- DIE at %s [in module %s]"), |
cd9983dd | 18516 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18517 | |
72bf9492 DJ |
18518 | /* If we're at the second level, and we're an enumerator, and |
18519 | our parent has no specification (meaning possibly lives in a | |
18520 | namespace elsewhere), then we can add the partial symbol now | |
18521 | instead of queueing it. */ | |
cd9983dd | 18522 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18523 | && parent_die != NULL |
18524 | && parent_die->die_parent == NULL | |
18525 | && parent_die->tag == DW_TAG_enumeration_type | |
18526 | && parent_die->has_specification == 0) | |
18527 | { | |
cd9983dd | 18528 | if (pdi.name == NULL) |
b98664d3 | 18529 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18530 | else if (building_psymtab) |
cd9983dd | 18531 | add_psymbol_to_list (pdi.name, strlen (pdi.name), 0, |
79748972 | 18532 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 18533 | cu->language == language_cplus |
75aedd27 TT |
18534 | ? psymbol_placement::GLOBAL |
18535 | : psymbol_placement::STATIC, | |
1762568f | 18536 | 0, cu->language, objfile); |
72bf9492 | 18537 | |
cd9983dd | 18538 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18539 | continue; |
18540 | } | |
18541 | ||
cd9983dd | 18542 | struct partial_die_info *part_die |
6f06d47b | 18543 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18544 | |
72bf9492 DJ |
18545 | /* We'll save this DIE so link it in. */ |
18546 | part_die->die_parent = parent_die; | |
18547 | part_die->die_sibling = NULL; | |
18548 | part_die->die_child = NULL; | |
18549 | ||
18550 | if (last_die && last_die == parent_die) | |
18551 | last_die->die_child = part_die; | |
18552 | else if (last_die) | |
18553 | last_die->die_sibling = part_die; | |
18554 | ||
18555 | last_die = part_die; | |
18556 | ||
18557 | if (first_die == NULL) | |
18558 | first_die = part_die; | |
18559 | ||
18560 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18561 | find interesting need to be in the hash table, because we | |
18562 | also have the parent/sibling/child chains; only those that we | |
18563 | might refer to by offset later during partial symbol reading. | |
18564 | ||
18565 | For now this means things that might have be the target of a | |
18566 | DW_AT_specification, DW_AT_abstract_origin, or | |
18567 | DW_AT_extension. DW_AT_extension will refer only to | |
18568 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18569 | many things under the function DIE, but we do not recurse | |
18570 | into function DIEs during partial symbol reading) and | |
18571 | possibly variables as well; DW_AT_specification refers to | |
18572 | declarations. Declarations ought to have the DW_AT_declaration | |
18573 | flag. It happens that GCC forgets to put it in sometimes, but | |
18574 | only for functions, not for types. | |
18575 | ||
18576 | Adding more things than necessary to the hash table is harmless | |
18577 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18578 | wasted time in find_partial_die, when we reread the compilation |
18579 | unit with load_all_dies set. */ | |
72bf9492 | 18580 | |
5afb4e99 | 18581 | if (load_all |
72929c62 | 18582 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18583 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18584 | || abbrev->tag == DW_TAG_variable |
18585 | || abbrev->tag == DW_TAG_namespace | |
18586 | || part_die->is_declaration) | |
18587 | { | |
18588 | void **slot; | |
18589 | ||
18590 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18591 | to_underlying (part_die->sect_off), |
18592 | INSERT); | |
72bf9492 DJ |
18593 | *slot = part_die; |
18594 | } | |
18595 | ||
72bf9492 | 18596 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 18597 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18598 | languages we have to, so that we can get at method physnames |
18599 | to infer fully qualified class names, for DW_AT_specification, | |
18600 | and for C++ template arguments. For C++, we also look one level | |
18601 | inside functions to find template arguments (if the name of the | |
18602 | function does not already contain the template arguments). | |
bc30ff58 JB |
18603 | |
18604 | For Ada, we need to scan the children of subprograms and lexical | |
18605 | blocks as well because Ada allows the definition of nested | |
18606 | entities that could be interesting for the debugger, such as | |
18607 | nested subprograms for instance. */ | |
72bf9492 | 18608 | if (last_die->has_children |
5afb4e99 DJ |
18609 | && (load_all |
18610 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18611 | || last_die->tag == DW_TAG_module |
72bf9492 | 18612 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18613 | || (cu->language == language_cplus |
18614 | && last_die->tag == DW_TAG_subprogram | |
18615 | && (last_die->name == NULL | |
18616 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18617 | || (cu->language != language_c |
18618 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18619 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18620 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
18621 | || last_die->tag == DW_TAG_union_type)) |
18622 | || (cu->language == language_ada | |
18623 | && (last_die->tag == DW_TAG_subprogram | |
18624 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18625 | { |
18626 | nesting_level++; | |
18627 | parent_die = last_die; | |
18628 | continue; | |
18629 | } | |
18630 | ||
18631 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18632 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18633 | |
18634 | /* Back to the top, do it again. */ | |
18635 | } | |
18636 | } | |
18637 | ||
6f06d47b YQ |
18638 | partial_die_info::partial_die_info (sect_offset sect_off_, |
18639 | struct abbrev_info *abbrev) | |
18640 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
18641 | { | |
18642 | } | |
18643 | ||
35cc7ed7 YQ |
18644 | /* Read a minimal amount of information into the minimal die structure. |
18645 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 18646 | |
48fbe735 YQ |
18647 | const gdb_byte * |
18648 | partial_die_info::read (const struct die_reader_specs *reader, | |
18649 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 18650 | { |
dee91e82 | 18651 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18652 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18653 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 18654 | unsigned int i; |
c5aa993b | 18655 | int has_low_pc_attr = 0; |
c906108c | 18656 | int has_high_pc_attr = 0; |
91da1414 | 18657 | int high_pc_relative = 0; |
c906108c | 18658 | |
fd0a254f | 18659 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 18660 | { |
48fbe735 YQ |
18661 | struct attribute attr; |
18662 | ||
fd0a254f | 18663 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
c906108c SS |
18664 | |
18665 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 18666 | partial symbol table. */ |
c906108c SS |
18667 | switch (attr.name) |
18668 | { | |
18669 | case DW_AT_name: | |
48fbe735 | 18670 | switch (tag) |
71c25dea TT |
18671 | { |
18672 | case DW_TAG_compile_unit: | |
95554aad | 18673 | case DW_TAG_partial_unit: |
348e048f | 18674 | case DW_TAG_type_unit: |
71c25dea TT |
18675 | /* Compilation units have a DW_AT_name that is a filename, not |
18676 | a source language identifier. */ | |
18677 | case DW_TAG_enumeration_type: | |
18678 | case DW_TAG_enumerator: | |
18679 | /* These tags always have simple identifiers already; no need | |
18680 | to canonicalize them. */ | |
48fbe735 | 18681 | name = DW_STRING (&attr); |
71c25dea TT |
18682 | break; |
18683 | default: | |
48fbe735 YQ |
18684 | { |
18685 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18686 | ||
18687 | name | |
18688 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
18689 | &objfile->per_bfd->storage_obstack); | |
18690 | } | |
71c25dea TT |
18691 | break; |
18692 | } | |
c906108c | 18693 | break; |
31ef98ae | 18694 | case DW_AT_linkage_name: |
c906108c | 18695 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18696 | /* Note that both forms of linkage name might appear. We |
18697 | assume they will be the same, and we only store the last | |
18698 | one we see. */ | |
48fbe735 | 18699 | linkage_name = DW_STRING (&attr); |
c906108c SS |
18700 | break; |
18701 | case DW_AT_low_pc: | |
18702 | has_low_pc_attr = 1; | |
48fbe735 | 18703 | lowpc = attr_value_as_address (&attr); |
c906108c SS |
18704 | break; |
18705 | case DW_AT_high_pc: | |
18706 | has_high_pc_attr = 1; | |
48fbe735 | 18707 | highpc = attr_value_as_address (&attr); |
31aa7e4e JB |
18708 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) |
18709 | high_pc_relative = 1; | |
c906108c SS |
18710 | break; |
18711 | case DW_AT_location: | |
0963b4bd | 18712 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
18713 | if (attr_form_is_block (&attr)) |
18714 | { | |
48fbe735 | 18715 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18716 | } |
3690dd37 | 18717 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 18718 | { |
4d3c2250 | 18719 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18720 | } |
18721 | else | |
18722 | { | |
4d3c2250 KB |
18723 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18724 | "partial symbol information"); | |
8e19ed76 | 18725 | } |
c906108c | 18726 | break; |
c906108c | 18727 | case DW_AT_external: |
48fbe735 | 18728 | is_external = DW_UNSND (&attr); |
c906108c SS |
18729 | break; |
18730 | case DW_AT_declaration: | |
48fbe735 | 18731 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18732 | break; |
18733 | case DW_AT_type: | |
48fbe735 | 18734 | has_type = 1; |
c906108c SS |
18735 | break; |
18736 | case DW_AT_abstract_origin: | |
18737 | case DW_AT_specification: | |
72bf9492 | 18738 | case DW_AT_extension: |
48fbe735 YQ |
18739 | has_specification = 1; |
18740 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18741 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18742 | || cu->per_cu->is_dwz); |
c906108c SS |
18743 | break; |
18744 | case DW_AT_sibling: | |
18745 | /* Ignore absolute siblings, they might point outside of | |
18746 | the current compile unit. */ | |
18747 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18748 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18749 | else |
b9502d3f | 18750 | { |
48fbe735 | 18751 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18752 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18753 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18754 | |
18755 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18756 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
18757 | else if (sibling_ptr > reader->buffer_end) |
18758 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 18759 | else |
48fbe735 | 18760 | sibling = sibling_ptr; |
b9502d3f | 18761 | } |
c906108c | 18762 | break; |
fa4028e9 | 18763 | case DW_AT_byte_size: |
48fbe735 | 18764 | has_byte_size = 1; |
fa4028e9 | 18765 | break; |
ff908ebf | 18766 | case DW_AT_const_value: |
48fbe735 | 18767 | has_const_value = 1; |
ff908ebf | 18768 | break; |
68511cec CES |
18769 | case DW_AT_calling_convention: |
18770 | /* DWARF doesn't provide a way to identify a program's source-level | |
18771 | entry point. DW_AT_calling_convention attributes are only meant | |
18772 | to describe functions' calling conventions. | |
18773 | ||
18774 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18775 | Fortran, and before DWARF 4 DW_CC_program was the only |
18776 | piece of debugging information whose definition refers to | |
18777 | a 'main program' at all, several compilers marked Fortran | |
18778 | main programs with DW_CC_program --- even when those | |
18779 | functions use the standard calling conventions. | |
18780 | ||
18781 | Although DWARF now specifies a way to provide this | |
18782 | information, we support this practice for backward | |
18783 | compatibility. */ | |
68511cec | 18784 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18785 | && cu->language == language_fortran) |
48fbe735 | 18786 | main_subprogram = 1; |
68511cec | 18787 | break; |
481860b3 GB |
18788 | case DW_AT_inline: |
18789 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18790 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18791 | may_be_inlined = 1; |
481860b3 | 18792 | break; |
95554aad TT |
18793 | |
18794 | case DW_AT_import: | |
48fbe735 | 18795 | if (tag == DW_TAG_imported_unit) |
36586728 | 18796 | { |
48fbe735 YQ |
18797 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18798 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18799 | || cu->per_cu->is_dwz); |
18800 | } | |
95554aad TT |
18801 | break; |
18802 | ||
0c1b455e | 18803 | case DW_AT_main_subprogram: |
48fbe735 | 18804 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18805 | break; |
18806 | ||
05caa1d2 TT |
18807 | case DW_AT_ranges: |
18808 | { | |
18809 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18810 | but that requires a full DIE, so instead we just | |
18811 | reimplement it. */ | |
18812 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18813 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18814 | + (need_ranges_base | |
18815 | ? cu->ranges_base | |
18816 | : 0)); | |
18817 | ||
18818 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18819 | .debug_ranges section. */ | |
18820 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18821 | nullptr)) | |
18822 | has_pc_info = 1; | |
18823 | } | |
18824 | break; | |
18825 | ||
c906108c SS |
18826 | default: |
18827 | break; | |
18828 | } | |
18829 | } | |
18830 | ||
10d06d82 TT |
18831 | /* For Ada, if both the name and the linkage name appear, we prefer |
18832 | the latter. This lets "catch exception" work better, regardless | |
18833 | of the order in which the name and linkage name were emitted. | |
18834 | Really, though, this is just a workaround for the fact that gdb | |
18835 | doesn't store both the name and the linkage name. */ | |
18836 | if (cu->language == language_ada && linkage_name != nullptr) | |
18837 | name = linkage_name; | |
18838 | ||
91da1414 | 18839 | if (high_pc_relative) |
48fbe735 | 18840 | highpc += lowpc; |
91da1414 | 18841 | |
9373cf26 JK |
18842 | if (has_low_pc_attr && has_high_pc_attr) |
18843 | { | |
18844 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18845 | eliminate duplicate copies of functions and vtables and such. | |
18846 | The linker will arbitrarily choose one and discard the others. | |
18847 | The AT_*_pc values for such functions refer to local labels in | |
18848 | these sections. If the section from that file was discarded, the | |
18849 | labels are not in the output, so the relocs get a value of 0. | |
18850 | If this is a discarded function, mark the pc bounds as invalid, | |
18851 | so that GDB will ignore it. */ | |
48fbe735 | 18852 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18853 | { |
48fbe735 | 18854 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18855 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18856 | |
b98664d3 | 18857 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18858 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18859 | paddress (gdbarch, lowpc), |
18860 | sect_offset_str (sect_off), | |
9d8780f0 | 18861 | objfile_name (objfile)); |
9373cf26 JK |
18862 | } |
18863 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18864 | else if (lowpc >= highpc) |
9373cf26 | 18865 | { |
48fbe735 | 18866 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18867 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18868 | |
b98664d3 | 18869 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18870 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18871 | paddress (gdbarch, lowpc), |
18872 | paddress (gdbarch, highpc), | |
18873 | sect_offset_str (sect_off), | |
9c541725 | 18874 | objfile_name (objfile)); |
9373cf26 JK |
18875 | } |
18876 | else | |
48fbe735 | 18877 | has_pc_info = 1; |
9373cf26 | 18878 | } |
85cbf3d3 | 18879 | |
c906108c SS |
18880 | return info_ptr; |
18881 | } | |
18882 | ||
72bf9492 DJ |
18883 | /* Find a cached partial DIE at OFFSET in CU. */ |
18884 | ||
d590ff25 YQ |
18885 | struct partial_die_info * |
18886 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18887 | { |
18888 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18889 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18890 | |
9a3c8263 | 18891 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18892 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18893 | to_underlying (sect_off))); |
72bf9492 | 18894 | |
72bf9492 DJ |
18895 | return lookup_die; |
18896 | } | |
18897 | ||
348e048f DE |
18898 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18899 | except in the case of .debug_types DIEs which do not reference | |
18900 | outside their CU (they do however referencing other types via | |
55f1336d | 18901 | DW_FORM_ref_sig8). */ |
72bf9492 | 18902 | |
122cf0f2 | 18903 | static const struct cu_partial_die_info |
9c541725 | 18904 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18905 | { |
518817b3 SM |
18906 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18907 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18908 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18909 | struct dwarf2_per_cu_data *per_cu = NULL; |
18910 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18911 | |
36586728 | 18912 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 18913 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 18914 | { |
d590ff25 | 18915 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18916 | if (pd != NULL) |
fb816e8b | 18917 | return { cu, pd }; |
0d99eb77 DE |
18918 | /* We missed recording what we needed. |
18919 | Load all dies and try again. */ | |
18920 | per_cu = cu->per_cu; | |
5afb4e99 | 18921 | } |
0d99eb77 DE |
18922 | else |
18923 | { | |
18924 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18925 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18926 | { |
9d8780f0 SM |
18927 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18928 | " external reference to offset %s [in module %s].\n"), | |
18929 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18930 | bfd_get_filename (objfile->obfd)); |
18931 | } | |
9c541725 | 18932 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18933 | dwarf2_per_objfile); |
72bf9492 | 18934 | |
0d99eb77 DE |
18935 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18936 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18937 | |
0d99eb77 | 18938 | per_cu->cu->last_used = 0; |
d590ff25 | 18939 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18940 | } |
5afb4e99 | 18941 | |
dee91e82 DE |
18942 | /* If we didn't find it, and not all dies have been loaded, |
18943 | load them all and try again. */ | |
18944 | ||
5afb4e99 DJ |
18945 | if (pd == NULL && per_cu->load_all_dies == 0) |
18946 | { | |
5afb4e99 | 18947 | per_cu->load_all_dies = 1; |
fd820528 DE |
18948 | |
18949 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18950 | THIS_CU->cu may already be in use. So we can't just free it and | |
18951 | replace its DIEs with the ones we read in. Instead, we leave those | |
18952 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18953 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18954 | set. */ | |
dee91e82 | 18955 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18956 | |
d590ff25 | 18957 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18958 | } |
18959 | ||
18960 | if (pd == NULL) | |
18961 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18962 | _("could not find partial DIE %s " |
3e43a32a | 18963 | "in cache [from module %s]\n"), |
9d8780f0 | 18964 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 18965 | return { per_cu->cu, pd }; |
72bf9492 DJ |
18966 | } |
18967 | ||
abc72ce4 DE |
18968 | /* See if we can figure out if the class lives in a namespace. We do |
18969 | this by looking for a member function; its demangled name will | |
18970 | contain namespace info, if there is any. */ | |
18971 | ||
18972 | static void | |
18973 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18974 | struct dwarf2_cu *cu) | |
18975 | { | |
18976 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18977 | what template types look like, because the demangler | |
18978 | frequently doesn't give the same name as the debug info. We | |
18979 | could fix this by only using the demangled name to get the | |
18980 | prefix (but see comment in read_structure_type). */ | |
18981 | ||
18982 | struct partial_die_info *real_pdi; | |
18983 | struct partial_die_info *child_pdi; | |
18984 | ||
18985 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18986 | we should not do this. We'll prepend the parent's fully qualified | |
18987 | name when we create the partial symbol. */ | |
18988 | ||
18989 | real_pdi = struct_pdi; | |
18990 | while (real_pdi->has_specification) | |
fb816e8b | 18991 | { |
122cf0f2 AB |
18992 | auto res = find_partial_die (real_pdi->spec_offset, |
18993 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
18994 | real_pdi = res.pdi; |
18995 | cu = res.cu; | |
18996 | } | |
abc72ce4 DE |
18997 | |
18998 | if (real_pdi->die_parent != NULL) | |
18999 | return; | |
19000 | ||
19001 | for (child_pdi = struct_pdi->die_child; | |
19002 | child_pdi != NULL; | |
19003 | child_pdi = child_pdi->die_sibling) | |
19004 | { | |
19005 | if (child_pdi->tag == DW_TAG_subprogram | |
19006 | && child_pdi->linkage_name != NULL) | |
19007 | { | |
19008 | char *actual_class_name | |
19009 | = language_class_name_from_physname (cu->language_defn, | |
19010 | child_pdi->linkage_name); | |
19011 | if (actual_class_name != NULL) | |
19012 | { | |
518817b3 | 19013 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 | 19014 | struct_pdi->name |
021887d8 TT |
19015 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
19016 | actual_class_name); | |
abc72ce4 DE |
19017 | xfree (actual_class_name); |
19018 | } | |
19019 | break; | |
19020 | } | |
19021 | } | |
19022 | } | |
19023 | ||
52356b79 YQ |
19024 | void |
19025 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 19026 | { |
abc72ce4 DE |
19027 | /* Once we've fixed up a die, there's no point in doing so again. |
19028 | This also avoids a memory leak if we were to call | |
19029 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 19030 | if (fixup_called) |
abc72ce4 DE |
19031 | return; |
19032 | ||
72bf9492 DJ |
19033 | /* If we found a reference attribute and the DIE has no name, try |
19034 | to find a name in the referred to DIE. */ | |
19035 | ||
52356b79 | 19036 | if (name == NULL && has_specification) |
72bf9492 DJ |
19037 | { |
19038 | struct partial_die_info *spec_die; | |
72bf9492 | 19039 | |
122cf0f2 | 19040 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
19041 | spec_die = res.pdi; |
19042 | cu = res.cu; | |
72bf9492 | 19043 | |
52356b79 | 19044 | spec_die->fixup (cu); |
72bf9492 DJ |
19045 | |
19046 | if (spec_die->name) | |
19047 | { | |
52356b79 | 19048 | name = spec_die->name; |
72bf9492 DJ |
19049 | |
19050 | /* Copy DW_AT_external attribute if it is set. */ | |
19051 | if (spec_die->is_external) | |
52356b79 | 19052 | is_external = spec_die->is_external; |
72bf9492 DJ |
19053 | } |
19054 | } | |
19055 | ||
19056 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 19057 | |
52356b79 YQ |
19058 | if (name == NULL && tag == DW_TAG_namespace) |
19059 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 19060 | |
abc72ce4 DE |
19061 | /* If there is no parent die to provide a namespace, and there are |
19062 | children, see if we can determine the namespace from their linkage | |
122d1940 | 19063 | name. */ |
abc72ce4 | 19064 | if (cu->language == language_cplus |
fd5866f6 | 19065 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
19066 | && die_parent == NULL |
19067 | && has_children | |
19068 | && (tag == DW_TAG_class_type | |
19069 | || tag == DW_TAG_structure_type | |
19070 | || tag == DW_TAG_union_type)) | |
19071 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 19072 | |
53832f31 TT |
19073 | /* GCC might emit a nameless struct or union that has a linkage |
19074 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
19075 | if (name == NULL |
19076 | && (tag == DW_TAG_class_type | |
19077 | || tag == DW_TAG_interface_type | |
19078 | || tag == DW_TAG_structure_type | |
19079 | || tag == DW_TAG_union_type) | |
19080 | && linkage_name != NULL) | |
53832f31 TT |
19081 | { |
19082 | char *demangled; | |
19083 | ||
52356b79 | 19084 | demangled = gdb_demangle (linkage_name, DMGL_TYPES); |
53832f31 TT |
19085 | if (demangled) |
19086 | { | |
96408a79 SA |
19087 | const char *base; |
19088 | ||
19089 | /* Strip any leading namespaces/classes, keep only the base name. | |
19090 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
19091 | base = strrchr (demangled, ':'); | |
19092 | if (base && base > demangled && base[-1] == ':') | |
19093 | base++; | |
19094 | else | |
19095 | base = demangled; | |
19096 | ||
518817b3 | 19097 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
021887d8 | 19098 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, base); |
53832f31 TT |
19099 | xfree (demangled); |
19100 | } | |
19101 | } | |
19102 | ||
52356b79 | 19103 | fixup_called = 1; |
72bf9492 DJ |
19104 | } |
19105 | ||
a8329558 | 19106 | /* Read an attribute value described by an attribute form. */ |
c906108c | 19107 | |
d521ce57 | 19108 | static const gdb_byte * |
dee91e82 DE |
19109 | read_attribute_value (const struct die_reader_specs *reader, |
19110 | struct attribute *attr, unsigned form, | |
43988095 | 19111 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 19112 | { |
dee91e82 | 19113 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
19114 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19115 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 19116 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 19117 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 19118 | bfd *abfd = reader->abfd; |
e7c27a73 | 19119 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19120 | unsigned int bytes_read; |
19121 | struct dwarf_block *blk; | |
19122 | ||
aead7601 | 19123 | attr->form = (enum dwarf_form) form; |
a8329558 | 19124 | switch (form) |
c906108c | 19125 | { |
c906108c | 19126 | case DW_FORM_ref_addr: |
ae411497 | 19127 | if (cu->header.version == 2) |
4568ecf9 | 19128 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 19129 | else |
4568ecf9 DE |
19130 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
19131 | &cu->header, &bytes_read); | |
ae411497 TT |
19132 | info_ptr += bytes_read; |
19133 | break; | |
36586728 TT |
19134 | case DW_FORM_GNU_ref_alt: |
19135 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19136 | info_ptr += bytes_read; | |
19137 | break; | |
ae411497 | 19138 | case DW_FORM_addr: |
e7c27a73 | 19139 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 19140 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 19141 | info_ptr += bytes_read; |
c906108c SS |
19142 | break; |
19143 | case DW_FORM_block2: | |
7b5a2f43 | 19144 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19145 | blk->size = read_2_bytes (abfd, info_ptr); |
19146 | info_ptr += 2; | |
19147 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19148 | info_ptr += blk->size; | |
19149 | DW_BLOCK (attr) = blk; | |
19150 | break; | |
19151 | case DW_FORM_block4: | |
7b5a2f43 | 19152 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19153 | blk->size = read_4_bytes (abfd, info_ptr); |
19154 | info_ptr += 4; | |
19155 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19156 | info_ptr += blk->size; | |
19157 | DW_BLOCK (attr) = blk; | |
19158 | break; | |
19159 | case DW_FORM_data2: | |
19160 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
19161 | info_ptr += 2; | |
19162 | break; | |
19163 | case DW_FORM_data4: | |
19164 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
19165 | info_ptr += 4; | |
19166 | break; | |
19167 | case DW_FORM_data8: | |
19168 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
19169 | info_ptr += 8; | |
19170 | break; | |
0224619f JK |
19171 | case DW_FORM_data16: |
19172 | blk = dwarf_alloc_block (cu); | |
19173 | blk->size = 16; | |
19174 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
19175 | info_ptr += 16; | |
19176 | DW_BLOCK (attr) = blk; | |
19177 | break; | |
2dc7f7b3 TT |
19178 | case DW_FORM_sec_offset: |
19179 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19180 | info_ptr += bytes_read; | |
19181 | break; | |
c906108c | 19182 | case DW_FORM_string: |
9b1c24c8 | 19183 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 19184 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
19185 | info_ptr += bytes_read; |
19186 | break; | |
4bdf3d34 | 19187 | case DW_FORM_strp: |
36586728 TT |
19188 | if (!cu->per_cu->is_dwz) |
19189 | { | |
ed2dc618 SM |
19190 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
19191 | abfd, info_ptr, cu_header, | |
36586728 TT |
19192 | &bytes_read); |
19193 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19194 | info_ptr += bytes_read; | |
19195 | break; | |
19196 | } | |
19197 | /* FALLTHROUGH */ | |
43988095 JK |
19198 | case DW_FORM_line_strp: |
19199 | if (!cu->per_cu->is_dwz) | |
19200 | { | |
ed2dc618 SM |
19201 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
19202 | abfd, info_ptr, | |
43988095 JK |
19203 | cu_header, &bytes_read); |
19204 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19205 | info_ptr += bytes_read; | |
19206 | break; | |
19207 | } | |
19208 | /* FALLTHROUGH */ | |
36586728 TT |
19209 | case DW_FORM_GNU_strp_alt: |
19210 | { | |
ed2dc618 | 19211 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19212 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, |
19213 | &bytes_read); | |
19214 | ||
ed2dc618 SM |
19215 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
19216 | dwz, str_offset); | |
36586728 TT |
19217 | DW_STRING_IS_CANONICAL (attr) = 0; |
19218 | info_ptr += bytes_read; | |
19219 | } | |
4bdf3d34 | 19220 | break; |
2dc7f7b3 | 19221 | case DW_FORM_exprloc: |
c906108c | 19222 | case DW_FORM_block: |
7b5a2f43 | 19223 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19224 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19225 | info_ptr += bytes_read; | |
19226 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19227 | info_ptr += blk->size; | |
19228 | DW_BLOCK (attr) = blk; | |
19229 | break; | |
19230 | case DW_FORM_block1: | |
7b5a2f43 | 19231 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19232 | blk->size = read_1_byte (abfd, info_ptr); |
19233 | info_ptr += 1; | |
19234 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19235 | info_ptr += blk->size; | |
19236 | DW_BLOCK (attr) = blk; | |
19237 | break; | |
19238 | case DW_FORM_data1: | |
19239 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19240 | info_ptr += 1; | |
19241 | break; | |
19242 | case DW_FORM_flag: | |
19243 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19244 | info_ptr += 1; | |
19245 | break; | |
2dc7f7b3 TT |
19246 | case DW_FORM_flag_present: |
19247 | DW_UNSND (attr) = 1; | |
19248 | break; | |
c906108c SS |
19249 | case DW_FORM_sdata: |
19250 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19251 | info_ptr += bytes_read; | |
19252 | break; | |
19253 | case DW_FORM_udata: | |
19254 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19255 | info_ptr += bytes_read; | |
19256 | break; | |
19257 | case DW_FORM_ref1: | |
9c541725 | 19258 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19259 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
19260 | info_ptr += 1; |
19261 | break; | |
19262 | case DW_FORM_ref2: | |
9c541725 | 19263 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19264 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19265 | info_ptr += 2; |
19266 | break; | |
19267 | case DW_FORM_ref4: | |
9c541725 | 19268 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19269 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19270 | info_ptr += 4; |
19271 | break; | |
613e1657 | 19272 | case DW_FORM_ref8: |
9c541725 | 19273 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19274 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
19275 | info_ptr += 8; |
19276 | break; | |
55f1336d | 19277 | case DW_FORM_ref_sig8: |
ac9ec31b | 19278 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
19279 | info_ptr += 8; |
19280 | break; | |
c906108c | 19281 | case DW_FORM_ref_udata: |
9c541725 | 19282 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19283 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19284 | info_ptr += bytes_read; |
19285 | break; | |
c906108c | 19286 | case DW_FORM_indirect: |
a8329558 KW |
19287 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19288 | info_ptr += bytes_read; | |
43988095 JK |
19289 | if (form == DW_FORM_implicit_const) |
19290 | { | |
19291 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19292 | info_ptr += bytes_read; | |
19293 | } | |
19294 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
19295 | info_ptr); | |
19296 | break; | |
19297 | case DW_FORM_implicit_const: | |
19298 | DW_SND (attr) = implicit_const; | |
a8329558 | 19299 | break; |
336d760d | 19300 | case DW_FORM_addrx: |
3019eac3 DE |
19301 | case DW_FORM_GNU_addr_index: |
19302 | if (reader->dwo_file == NULL) | |
19303 | { | |
19304 | /* For now flag a hard error. | |
19305 | Later we can turn this into a complaint. */ | |
19306 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19307 | dwarf_form_name (form), | |
19308 | bfd_get_filename (abfd)); | |
19309 | } | |
19310 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
19311 | info_ptr += bytes_read; | |
19312 | break; | |
cf532bd1 | 19313 | case DW_FORM_strx: |
15f18d14 AT |
19314 | case DW_FORM_strx1: |
19315 | case DW_FORM_strx2: | |
19316 | case DW_FORM_strx3: | |
19317 | case DW_FORM_strx4: | |
3019eac3 DE |
19318 | case DW_FORM_GNU_str_index: |
19319 | if (reader->dwo_file == NULL) | |
19320 | { | |
19321 | /* For now flag a hard error. | |
19322 | Later we can turn this into a complaint if warranted. */ | |
19323 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19324 | dwarf_form_name (form), | |
19325 | bfd_get_filename (abfd)); | |
19326 | } | |
19327 | { | |
15f18d14 AT |
19328 | ULONGEST str_index; |
19329 | if (form == DW_FORM_strx1) | |
19330 | { | |
19331 | str_index = read_1_byte (abfd, info_ptr); | |
19332 | info_ptr += 1; | |
19333 | } | |
19334 | else if (form == DW_FORM_strx2) | |
19335 | { | |
19336 | str_index = read_2_bytes (abfd, info_ptr); | |
19337 | info_ptr += 2; | |
19338 | } | |
19339 | else if (form == DW_FORM_strx3) | |
19340 | { | |
19341 | str_index = read_3_bytes (abfd, info_ptr); | |
19342 | info_ptr += 3; | |
19343 | } | |
19344 | else if (form == DW_FORM_strx4) | |
19345 | { | |
19346 | str_index = read_4_bytes (abfd, info_ptr); | |
19347 | info_ptr += 4; | |
19348 | } | |
19349 | else | |
19350 | { | |
19351 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19352 | info_ptr += bytes_read; | |
19353 | } | |
342587c4 | 19354 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 | 19355 | DW_STRING_IS_CANONICAL (attr) = 0; |
3019eac3 DE |
19356 | } |
19357 | break; | |
c906108c | 19358 | default: |
8a3fe4f8 | 19359 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19360 | dwarf_form_name (form), |
19361 | bfd_get_filename (abfd)); | |
c906108c | 19362 | } |
28e94949 | 19363 | |
36586728 | 19364 | /* Super hack. */ |
7771576e | 19365 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
19366 | attr->form = DW_FORM_GNU_ref_alt; |
19367 | ||
28e94949 JB |
19368 | /* We have seen instances where the compiler tried to emit a byte |
19369 | size attribute of -1 which ended up being encoded as an unsigned | |
19370 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19371 | an object of this size seems pretty unlikely so we can relatively | |
19372 | safely treat these cases as if the size attribute was invalid and | |
19373 | treat them as zero by default. */ | |
19374 | if (attr->name == DW_AT_byte_size | |
19375 | && form == DW_FORM_data4 | |
19376 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19377 | { |
19378 | complaint | |
b98664d3 | 19379 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 19380 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
19381 | DW_UNSND (attr) = 0; |
19382 | } | |
28e94949 | 19383 | |
c906108c SS |
19384 | return info_ptr; |
19385 | } | |
19386 | ||
a8329558 KW |
19387 | /* Read an attribute described by an abbreviated attribute. */ |
19388 | ||
d521ce57 | 19389 | static const gdb_byte * |
dee91e82 DE |
19390 | read_attribute (const struct die_reader_specs *reader, |
19391 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 19392 | const gdb_byte *info_ptr) |
a8329558 KW |
19393 | { |
19394 | attr->name = abbrev->name; | |
43988095 JK |
19395 | return read_attribute_value (reader, attr, abbrev->form, |
19396 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
19397 | } |
19398 | ||
0963b4bd | 19399 | /* Read dwarf information from a buffer. */ |
c906108c SS |
19400 | |
19401 | static unsigned int | |
a1855c1d | 19402 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19403 | { |
fe1b8b76 | 19404 | return bfd_get_8 (abfd, buf); |
c906108c SS |
19405 | } |
19406 | ||
19407 | static int | |
a1855c1d | 19408 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19409 | { |
fe1b8b76 | 19410 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
19411 | } |
19412 | ||
19413 | static unsigned int | |
a1855c1d | 19414 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19415 | { |
fe1b8b76 | 19416 | return bfd_get_16 (abfd, buf); |
c906108c SS |
19417 | } |
19418 | ||
21ae7a4d | 19419 | static int |
a1855c1d | 19420 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19421 | { |
19422 | return bfd_get_signed_16 (abfd, buf); | |
19423 | } | |
19424 | ||
15f18d14 AT |
19425 | static unsigned int |
19426 | read_3_bytes (bfd *abfd, const gdb_byte *buf) | |
19427 | { | |
19428 | unsigned int result = 0; | |
19429 | for (int i = 0; i < 3; ++i) | |
19430 | { | |
19431 | unsigned char byte = bfd_get_8 (abfd, buf); | |
19432 | buf++; | |
19433 | result |= ((unsigned int) byte << (i * 8)); | |
19434 | } | |
19435 | return result; | |
19436 | } | |
19437 | ||
c906108c | 19438 | static unsigned int |
a1855c1d | 19439 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19440 | { |
fe1b8b76 | 19441 | return bfd_get_32 (abfd, buf); |
c906108c SS |
19442 | } |
19443 | ||
21ae7a4d | 19444 | static int |
a1855c1d | 19445 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19446 | { |
19447 | return bfd_get_signed_32 (abfd, buf); | |
19448 | } | |
19449 | ||
93311388 | 19450 | static ULONGEST |
a1855c1d | 19451 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19452 | { |
fe1b8b76 | 19453 | return bfd_get_64 (abfd, buf); |
c906108c SS |
19454 | } |
19455 | ||
19456 | static CORE_ADDR | |
d521ce57 | 19457 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 19458 | unsigned int *bytes_read) |
c906108c | 19459 | { |
e7c27a73 | 19460 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19461 | CORE_ADDR retval = 0; |
19462 | ||
107d2387 | 19463 | if (cu_header->signed_addr_p) |
c906108c | 19464 | { |
107d2387 AC |
19465 | switch (cu_header->addr_size) |
19466 | { | |
19467 | case 2: | |
fe1b8b76 | 19468 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
19469 | break; |
19470 | case 4: | |
fe1b8b76 | 19471 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
19472 | break; |
19473 | case 8: | |
fe1b8b76 | 19474 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
19475 | break; |
19476 | default: | |
8e65ff28 | 19477 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 19478 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 19479 | bfd_get_filename (abfd)); |
107d2387 AC |
19480 | } |
19481 | } | |
19482 | else | |
19483 | { | |
19484 | switch (cu_header->addr_size) | |
19485 | { | |
19486 | case 2: | |
fe1b8b76 | 19487 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
19488 | break; |
19489 | case 4: | |
fe1b8b76 | 19490 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
19491 | break; |
19492 | case 8: | |
fe1b8b76 | 19493 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
19494 | break; |
19495 | default: | |
8e65ff28 | 19496 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
19497 | _("read_address: bad switch, " |
19498 | "unsigned [in module %s]"), | |
659b0389 | 19499 | bfd_get_filename (abfd)); |
107d2387 | 19500 | } |
c906108c | 19501 | } |
64367e0a | 19502 | |
107d2387 AC |
19503 | *bytes_read = cu_header->addr_size; |
19504 | return retval; | |
c906108c SS |
19505 | } |
19506 | ||
f7ef9339 | 19507 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
19508 | specification allows the initial length to take up either 4 bytes |
19509 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
19510 | bytes describe the length and all offsets will be 8 bytes in length | |
19511 | instead of 4. | |
19512 | ||
f7ef9339 KB |
19513 | An older, non-standard 64-bit format is also handled by this |
19514 | function. The older format in question stores the initial length | |
19515 | as an 8-byte quantity without an escape value. Lengths greater | |
19516 | than 2^32 aren't very common which means that the initial 4 bytes | |
19517 | is almost always zero. Since a length value of zero doesn't make | |
19518 | sense for the 32-bit format, this initial zero can be considered to | |
19519 | be an escape value which indicates the presence of the older 64-bit | |
19520 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
19521 | greater than 4GB. If it becomes necessary to handle lengths |
19522 | somewhat larger than 4GB, we could allow other small values (such | |
19523 | as the non-sensical values of 1, 2, and 3) to also be used as | |
19524 | escape values indicating the presence of the old format. | |
f7ef9339 | 19525 | |
917c78fc MK |
19526 | The value returned via bytes_read should be used to increment the |
19527 | relevant pointer after calling read_initial_length(). | |
c764a876 | 19528 | |
613e1657 KB |
19529 | [ Note: read_initial_length() and read_offset() are based on the |
19530 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 19531 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
19532 | from: |
19533 | ||
f7ef9339 | 19534 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 19535 | |
613e1657 KB |
19536 | This document is only a draft and is subject to change. (So beware.) |
19537 | ||
f7ef9339 | 19538 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
19539 | determined empirically by examining 64-bit ELF files produced by |
19540 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
19541 | |
19542 | - Kevin, July 16, 2002 | |
613e1657 KB |
19543 | ] */ |
19544 | ||
19545 | static LONGEST | |
d521ce57 | 19546 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 19547 | { |
fe1b8b76 | 19548 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 19549 | |
dd373385 | 19550 | if (length == 0xffffffff) |
613e1657 | 19551 | { |
fe1b8b76 | 19552 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 19553 | *bytes_read = 12; |
613e1657 | 19554 | } |
dd373385 | 19555 | else if (length == 0) |
f7ef9339 | 19556 | { |
dd373385 | 19557 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 19558 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 19559 | *bytes_read = 8; |
f7ef9339 | 19560 | } |
613e1657 KB |
19561 | else |
19562 | { | |
19563 | *bytes_read = 4; | |
613e1657 KB |
19564 | } |
19565 | ||
c764a876 DE |
19566 | return length; |
19567 | } | |
dd373385 | 19568 | |
c764a876 DE |
19569 | /* Cover function for read_initial_length. |
19570 | Returns the length of the object at BUF, and stores the size of the | |
19571 | initial length in *BYTES_READ and stores the size that offsets will be in | |
19572 | *OFFSET_SIZE. | |
19573 | If the initial length size is not equivalent to that specified in | |
19574 | CU_HEADER then issue a complaint. | |
19575 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 19576 | |
c764a876 | 19577 | static LONGEST |
d521ce57 | 19578 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
19579 | const struct comp_unit_head *cu_header, |
19580 | unsigned int *bytes_read, | |
19581 | unsigned int *offset_size) | |
19582 | { | |
19583 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
19584 | ||
19585 | gdb_assert (cu_header->initial_length_size == 4 | |
19586 | || cu_header->initial_length_size == 8 | |
19587 | || cu_header->initial_length_size == 12); | |
19588 | ||
19589 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 19590 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 19591 | |
c764a876 | 19592 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 19593 | return length; |
613e1657 KB |
19594 | } |
19595 | ||
19596 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 19597 | given by cu_header->offset_size. */ |
613e1657 KB |
19598 | |
19599 | static LONGEST | |
d521ce57 TT |
19600 | read_offset (bfd *abfd, const gdb_byte *buf, |
19601 | const struct comp_unit_head *cu_header, | |
891d2f0b | 19602 | unsigned int *bytes_read) |
c764a876 DE |
19603 | { |
19604 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 19605 | |
c764a876 DE |
19606 | *bytes_read = cu_header->offset_size; |
19607 | return offset; | |
19608 | } | |
19609 | ||
19610 | /* Read an offset from the data stream. */ | |
19611 | ||
19612 | static LONGEST | |
d521ce57 | 19613 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
19614 | { |
19615 | LONGEST retval = 0; | |
19616 | ||
c764a876 | 19617 | switch (offset_size) |
613e1657 KB |
19618 | { |
19619 | case 4: | |
fe1b8b76 | 19620 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
19621 | break; |
19622 | case 8: | |
fe1b8b76 | 19623 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
19624 | break; |
19625 | default: | |
8e65ff28 | 19626 | internal_error (__FILE__, __LINE__, |
c764a876 | 19627 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 19628 | bfd_get_filename (abfd)); |
613e1657 KB |
19629 | } |
19630 | ||
917c78fc | 19631 | return retval; |
613e1657 KB |
19632 | } |
19633 | ||
d521ce57 TT |
19634 | static const gdb_byte * |
19635 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
19636 | { |
19637 | /* If the size of a host char is 8 bits, we can return a pointer | |
19638 | to the buffer, otherwise we have to copy the data to a buffer | |
19639 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19640 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 19641 | return buf; |
c906108c SS |
19642 | } |
19643 | ||
d521ce57 TT |
19644 | static const char * |
19645 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
19646 | unsigned int *bytes_read_ptr) | |
c906108c SS |
19647 | { |
19648 | /* If the size of a host char is 8 bits, we can return a pointer | |
19649 | to the string, otherwise we have to copy the string to a buffer | |
19650 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19651 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
19652 | if (*buf == '\0') |
19653 | { | |
19654 | *bytes_read_ptr = 1; | |
19655 | return NULL; | |
19656 | } | |
d521ce57 TT |
19657 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
19658 | return (const char *) buf; | |
4bdf3d34 JJ |
19659 | } |
19660 | ||
43988095 JK |
19661 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
19662 | reporting strings FORM_NAME and SECT_NAME. */ | |
19663 | ||
d521ce57 | 19664 | static const char * |
ed2dc618 SM |
19665 | read_indirect_string_at_offset_from (struct objfile *objfile, |
19666 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
19667 | struct dwarf2_section_info *sect, |
19668 | const char *form_name, | |
19669 | const char *sect_name) | |
19670 | { | |
ed2dc618 | 19671 | dwarf2_read_section (objfile, sect); |
43988095 JK |
19672 | if (sect->buffer == NULL) |
19673 | error (_("%s used without %s section [in module %s]"), | |
19674 | form_name, sect_name, bfd_get_filename (abfd)); | |
19675 | if (str_offset >= sect->size) | |
19676 | error (_("%s pointing outside of %s section [in module %s]"), | |
19677 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 19678 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 19679 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 19680 | return NULL; |
43988095 JK |
19681 | return (const char *) (sect->buffer + str_offset); |
19682 | } | |
19683 | ||
19684 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
19685 | ||
19686 | static const char * | |
ed2dc618 SM |
19687 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19688 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19689 | { |
ed2dc618 SM |
19690 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19691 | abfd, str_offset, | |
43988095 JK |
19692 | &dwarf2_per_objfile->str, |
19693 | "DW_FORM_strp", ".debug_str"); | |
19694 | } | |
19695 | ||
19696 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
19697 | ||
19698 | static const char * | |
ed2dc618 SM |
19699 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19700 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19701 | { |
ed2dc618 SM |
19702 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19703 | abfd, str_offset, | |
43988095 JK |
19704 | &dwarf2_per_objfile->line_str, |
19705 | "DW_FORM_line_strp", | |
19706 | ".debug_line_str"); | |
c906108c SS |
19707 | } |
19708 | ||
36586728 TT |
19709 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
19710 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
19711 | the string consists of a single NUL byte, return NULL; otherwise | |
19712 | return a pointer to the string. */ | |
19713 | ||
d521ce57 | 19714 | static const char * |
ed2dc618 SM |
19715 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
19716 | LONGEST str_offset) | |
36586728 | 19717 | { |
ed2dc618 | 19718 | dwarf2_read_section (objfile, &dwz->str); |
36586728 TT |
19719 | |
19720 | if (dwz->str.buffer == NULL) | |
19721 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
19722 | "section [in module %s]"), | |
19723 | bfd_get_filename (dwz->dwz_bfd)); | |
19724 | if (str_offset >= dwz->str.size) | |
19725 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
19726 | ".debug_str section [in module %s]"), | |
19727 | bfd_get_filename (dwz->dwz_bfd)); | |
19728 | gdb_assert (HOST_CHAR_BIT == 8); | |
19729 | if (dwz->str.buffer[str_offset] == '\0') | |
19730 | return NULL; | |
d521ce57 | 19731 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
19732 | } |
19733 | ||
43988095 JK |
19734 | /* Return pointer to string at .debug_str offset as read from BUF. |
19735 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19736 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19737 | ||
d521ce57 | 19738 | static const char * |
ed2dc618 SM |
19739 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
19740 | const gdb_byte *buf, | |
cf2c3c16 TT |
19741 | const struct comp_unit_head *cu_header, |
19742 | unsigned int *bytes_read_ptr) | |
19743 | { | |
19744 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19745 | ||
ed2dc618 | 19746 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
19747 | } |
19748 | ||
43988095 JK |
19749 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
19750 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
19751 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
19752 | ||
19753 | static const char * | |
ed2dc618 SM |
19754 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19755 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
19756 | const struct comp_unit_head *cu_header, |
19757 | unsigned int *bytes_read_ptr) | |
19758 | { | |
19759 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
19760 | ||
ed2dc618 SM |
19761 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
19762 | str_offset); | |
43988095 JK |
19763 | } |
19764 | ||
19765 | ULONGEST | |
d521ce57 | 19766 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 19767 | unsigned int *bytes_read_ptr) |
c906108c | 19768 | { |
12df843f | 19769 | ULONGEST result; |
ce5d95e1 | 19770 | unsigned int num_read; |
870f88f7 | 19771 | int shift; |
c906108c SS |
19772 | unsigned char byte; |
19773 | ||
19774 | result = 0; | |
19775 | shift = 0; | |
19776 | num_read = 0; | |
c906108c SS |
19777 | while (1) |
19778 | { | |
fe1b8b76 | 19779 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19780 | buf++; |
19781 | num_read++; | |
12df843f | 19782 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19783 | if ((byte & 128) == 0) |
19784 | { | |
19785 | break; | |
19786 | } | |
19787 | shift += 7; | |
19788 | } | |
19789 | *bytes_read_ptr = num_read; | |
19790 | return result; | |
19791 | } | |
19792 | ||
12df843f | 19793 | static LONGEST |
d521ce57 TT |
19794 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
19795 | unsigned int *bytes_read_ptr) | |
c906108c | 19796 | { |
4dd1b460 | 19797 | ULONGEST result; |
870f88f7 | 19798 | int shift, num_read; |
c906108c SS |
19799 | unsigned char byte; |
19800 | ||
19801 | result = 0; | |
19802 | shift = 0; | |
c906108c | 19803 | num_read = 0; |
c906108c SS |
19804 | while (1) |
19805 | { | |
fe1b8b76 | 19806 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
19807 | buf++; |
19808 | num_read++; | |
4dd1b460 | 19809 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
19810 | shift += 7; |
19811 | if ((byte & 128) == 0) | |
19812 | { | |
19813 | break; | |
19814 | } | |
19815 | } | |
77e0b926 | 19816 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
4dd1b460 | 19817 | result |= -(((ULONGEST) 1) << shift); |
c906108c SS |
19818 | *bytes_read_ptr = num_read; |
19819 | return result; | |
19820 | } | |
19821 | ||
3019eac3 DE |
19822 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
19823 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
19824 | ADDR_SIZE is the size of addresses from the CU header. */ | |
19825 | ||
19826 | static CORE_ADDR | |
ed2dc618 SM |
19827 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19828 | unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
3019eac3 DE |
19829 | { |
19830 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19831 | bfd *abfd = objfile->obfd; | |
19832 | const gdb_byte *info_ptr; | |
19833 | ||
19834 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
19835 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
19836 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 19837 | objfile_name (objfile)); |
3019eac3 DE |
19838 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
19839 | error (_("DW_FORM_addr_index pointing outside of " | |
19840 | ".debug_addr section [in module %s]"), | |
4262abfb | 19841 | objfile_name (objfile)); |
3019eac3 DE |
19842 | info_ptr = (dwarf2_per_objfile->addr.buffer |
19843 | + addr_base + addr_index * addr_size); | |
19844 | if (addr_size == 4) | |
19845 | return bfd_get_32 (abfd, info_ptr); | |
19846 | else | |
19847 | return bfd_get_64 (abfd, info_ptr); | |
19848 | } | |
19849 | ||
19850 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
19851 | ||
19852 | static CORE_ADDR | |
19853 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
19854 | { | |
518817b3 SM |
19855 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
19856 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
19857 | } |
19858 | ||
19859 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
19860 | ||
19861 | static CORE_ADDR | |
d521ce57 | 19862 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
19863 | unsigned int *bytes_read) |
19864 | { | |
518817b3 | 19865 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
19866 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
19867 | ||
19868 | return read_addr_index (cu, addr_index); | |
19869 | } | |
19870 | ||
19871 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
19872 | back to dwarf2_read_addr_index. */ | |
19873 | ||
19874 | struct dwarf2_read_addr_index_data | |
19875 | { | |
19876 | ULONGEST addr_base; | |
19877 | int addr_size; | |
19878 | }; | |
19879 | ||
19880 | /* die_reader_func for dwarf2_read_addr_index. */ | |
19881 | ||
19882 | static void | |
19883 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 19884 | const gdb_byte *info_ptr, |
3019eac3 DE |
19885 | struct die_info *comp_unit_die, |
19886 | int has_children, | |
19887 | void *data) | |
19888 | { | |
19889 | struct dwarf2_cu *cu = reader->cu; | |
19890 | struct dwarf2_read_addr_index_data *aidata = | |
19891 | (struct dwarf2_read_addr_index_data *) data; | |
19892 | ||
19893 | aidata->addr_base = cu->addr_base; | |
19894 | aidata->addr_size = cu->header.addr_size; | |
19895 | } | |
19896 | ||
19897 | /* Given an index in .debug_addr, fetch the value. | |
19898 | NOTE: This can be called during dwarf expression evaluation, | |
19899 | long after the debug information has been read, and thus per_cu->cu | |
19900 | may no longer exist. */ | |
19901 | ||
19902 | CORE_ADDR | |
19903 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
19904 | unsigned int addr_index) | |
19905 | { | |
ed2dc618 | 19906 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 DE |
19907 | struct dwarf2_cu *cu = per_cu->cu; |
19908 | ULONGEST addr_base; | |
19909 | int addr_size; | |
19910 | ||
3019eac3 DE |
19911 | /* We need addr_base and addr_size. |
19912 | If we don't have PER_CU->cu, we have to get it. | |
19913 | Nasty, but the alternative is storing the needed info in PER_CU, | |
19914 | which at this point doesn't seem justified: it's not clear how frequently | |
19915 | it would get used and it would increase the size of every PER_CU. | |
19916 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
19917 | so we're not in uncharted territory here. | |
19918 | Alas we need to be a bit more complicated as addr_base is contained | |
19919 | in the DIE. | |
19920 | ||
19921 | We don't need to read the entire CU(/TU). | |
19922 | We just need the header and top level die. | |
a1b64ce1 | 19923 | |
3019eac3 | 19924 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 19925 | For now we skip this optimization. */ |
3019eac3 DE |
19926 | |
19927 | if (cu != NULL) | |
19928 | { | |
19929 | addr_base = cu->addr_base; | |
19930 | addr_size = cu->header.addr_size; | |
19931 | } | |
19932 | else | |
19933 | { | |
19934 | struct dwarf2_read_addr_index_data aidata; | |
19935 | ||
a1b64ce1 DE |
19936 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
19937 | we need addr_base. */ | |
58f0c718 | 19938 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, false, |
a1b64ce1 | 19939 | dwarf2_read_addr_index_reader, &aidata); |
3019eac3 DE |
19940 | addr_base = aidata.addr_base; |
19941 | addr_size = aidata.addr_size; | |
19942 | } | |
19943 | ||
ed2dc618 SM |
19944 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
19945 | addr_size); | |
3019eac3 DE |
19946 | } |
19947 | ||
cf532bd1 | 19948 | /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string. |
57d63ce2 | 19949 | This is only used by the Fission support. */ |
3019eac3 | 19950 | |
d521ce57 | 19951 | static const char * |
342587c4 | 19952 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 | 19953 | { |
ed2dc618 | 19954 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
19955 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19956 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19957 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 19958 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 19959 | bfd *abfd = objfile->obfd; |
73869dc2 DE |
19960 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
19961 | struct dwarf2_section_info *str_offsets_section = | |
19962 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 19963 | const gdb_byte *info_ptr; |
3019eac3 | 19964 | ULONGEST str_offset; |
cf532bd1 | 19965 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 19966 | |
73869dc2 DE |
19967 | dwarf2_read_section (objfile, str_section); |
19968 | dwarf2_read_section (objfile, str_offsets_section); | |
19969 | if (str_section->buffer == NULL) | |
57d63ce2 | 19970 | error (_("%s used without .debug_str.dwo section" |
9d8780f0 SM |
19971 | " in CU at offset %s [in module %s]"), |
19972 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19973 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 19974 | error (_("%s used without .debug_str_offsets.dwo section" |
9d8780f0 SM |
19975 | " in CU at offset %s [in module %s]"), |
19976 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19977 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 19978 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9d8780f0 SM |
19979 | " section in CU at offset %s [in module %s]"), |
19980 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19981 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
19982 | + str_index * cu->header.offset_size); |
19983 | if (cu->header.offset_size == 4) | |
19984 | str_offset = bfd_get_32 (abfd, info_ptr); | |
19985 | else | |
19986 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 19987 | if (str_offset >= str_section->size) |
57d63ce2 | 19988 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
19989 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
19990 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 19991 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
19992 | } |
19993 | ||
3019eac3 DE |
19994 | /* Return the length of an LEB128 number in BUF. */ |
19995 | ||
19996 | static int | |
19997 | leb128_size (const gdb_byte *buf) | |
19998 | { | |
19999 | const gdb_byte *begin = buf; | |
20000 | gdb_byte byte; | |
20001 | ||
20002 | while (1) | |
20003 | { | |
20004 | byte = *buf++; | |
20005 | if ((byte & 128) == 0) | |
20006 | return buf - begin; | |
20007 | } | |
20008 | } | |
20009 | ||
c906108c | 20010 | static void |
e142c38c | 20011 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
20012 | { |
20013 | switch (lang) | |
20014 | { | |
20015 | case DW_LANG_C89: | |
76bee0cc | 20016 | case DW_LANG_C99: |
0cfd832f | 20017 | case DW_LANG_C11: |
c906108c | 20018 | case DW_LANG_C: |
d1be3247 | 20019 | case DW_LANG_UPC: |
e142c38c | 20020 | cu->language = language_c; |
c906108c | 20021 | break; |
9c37b5ae | 20022 | case DW_LANG_Java: |
c906108c | 20023 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
20024 | case DW_LANG_C_plus_plus_11: |
20025 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 20026 | cu->language = language_cplus; |
c906108c | 20027 | break; |
6aecb9c2 JB |
20028 | case DW_LANG_D: |
20029 | cu->language = language_d; | |
20030 | break; | |
c906108c SS |
20031 | case DW_LANG_Fortran77: |
20032 | case DW_LANG_Fortran90: | |
b21b22e0 | 20033 | case DW_LANG_Fortran95: |
f7de9aab MW |
20034 | case DW_LANG_Fortran03: |
20035 | case DW_LANG_Fortran08: | |
e142c38c | 20036 | cu->language = language_fortran; |
c906108c | 20037 | break; |
a766d390 DE |
20038 | case DW_LANG_Go: |
20039 | cu->language = language_go; | |
20040 | break; | |
c906108c | 20041 | case DW_LANG_Mips_Assembler: |
e142c38c | 20042 | cu->language = language_asm; |
c906108c SS |
20043 | break; |
20044 | case DW_LANG_Ada83: | |
8aaf0b47 | 20045 | case DW_LANG_Ada95: |
bc5f45f8 JB |
20046 | cu->language = language_ada; |
20047 | break; | |
72019c9c GM |
20048 | case DW_LANG_Modula2: |
20049 | cu->language = language_m2; | |
20050 | break; | |
fe8e67fd PM |
20051 | case DW_LANG_Pascal83: |
20052 | cu->language = language_pascal; | |
20053 | break; | |
22566fbd DJ |
20054 | case DW_LANG_ObjC: |
20055 | cu->language = language_objc; | |
20056 | break; | |
c44af4eb TT |
20057 | case DW_LANG_Rust: |
20058 | case DW_LANG_Rust_old: | |
20059 | cu->language = language_rust; | |
20060 | break; | |
c906108c SS |
20061 | case DW_LANG_Cobol74: |
20062 | case DW_LANG_Cobol85: | |
c906108c | 20063 | default: |
e142c38c | 20064 | cu->language = language_minimal; |
c906108c SS |
20065 | break; |
20066 | } | |
e142c38c | 20067 | cu->language_defn = language_def (cu->language); |
c906108c SS |
20068 | } |
20069 | ||
20070 | /* Return the named attribute or NULL if not there. */ | |
20071 | ||
20072 | static struct attribute * | |
e142c38c | 20073 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 20074 | { |
a48e046c | 20075 | for (;;) |
c906108c | 20076 | { |
a48e046c TT |
20077 | unsigned int i; |
20078 | struct attribute *spec = NULL; | |
20079 | ||
20080 | for (i = 0; i < die->num_attrs; ++i) | |
20081 | { | |
20082 | if (die->attrs[i].name == name) | |
20083 | return &die->attrs[i]; | |
20084 | if (die->attrs[i].name == DW_AT_specification | |
20085 | || die->attrs[i].name == DW_AT_abstract_origin) | |
20086 | spec = &die->attrs[i]; | |
20087 | } | |
20088 | ||
20089 | if (!spec) | |
20090 | break; | |
c906108c | 20091 | |
f2f0e013 | 20092 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 20093 | } |
c5aa993b | 20094 | |
c906108c SS |
20095 | return NULL; |
20096 | } | |
20097 | ||
348e048f DE |
20098 | /* Return the named attribute or NULL if not there, |
20099 | but do not follow DW_AT_specification, etc. | |
20100 | This is for use in contexts where we're reading .debug_types dies. | |
20101 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
20102 | back up the chain, and we want to go down. */ | |
20103 | ||
20104 | static struct attribute * | |
45e58e77 | 20105 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
20106 | { |
20107 | unsigned int i; | |
20108 | ||
20109 | for (i = 0; i < die->num_attrs; ++i) | |
20110 | if (die->attrs[i].name == name) | |
20111 | return &die->attrs[i]; | |
20112 | ||
20113 | return NULL; | |
20114 | } | |
20115 | ||
7d45c7c3 KB |
20116 | /* Return the string associated with a string-typed attribute, or NULL if it |
20117 | is either not found or is of an incorrect type. */ | |
20118 | ||
20119 | static const char * | |
20120 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
20121 | { | |
20122 | struct attribute *attr; | |
20123 | const char *str = NULL; | |
20124 | ||
20125 | attr = dwarf2_attr (die, name, cu); | |
20126 | ||
20127 | if (attr != NULL) | |
20128 | { | |
43988095 | 20129 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 20130 | || attr->form == DW_FORM_string |
cf532bd1 | 20131 | || attr->form == DW_FORM_strx |
b3340438 | 20132 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 20133 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
20134 | str = DW_STRING (attr); |
20135 | else | |
b98664d3 | 20136 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
20137 | "DIE at %s in module %s"), |
20138 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 20139 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
20140 | } |
20141 | ||
20142 | return str; | |
20143 | } | |
20144 | ||
a084a2a6 AT |
20145 | /* Return the dwo name or NULL if not present. If present, it is in either |
20146 | DW_AT_GNU_dwo_name or DW_AT_dwo_name atrribute. */ | |
20147 | static const char * | |
20148 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
20149 | { | |
20150 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
20151 | if (dwo_name == nullptr) | |
20152 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
20153 | return dwo_name; | |
20154 | } | |
20155 | ||
05cf31d1 JB |
20156 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
20157 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 20158 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
20159 | |
20160 | static int | |
20161 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
20162 | { | |
20163 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
20164 | ||
20165 | return (attr && DW_UNSND (attr)); | |
20166 | } | |
20167 | ||
3ca72b44 | 20168 | static int |
e142c38c | 20169 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 20170 | { |
05cf31d1 JB |
20171 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
20172 | which value is non-zero. However, we have to be careful with | |
20173 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
20174 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
20175 | end up accidently finding a declaration attribute that belongs | |
20176 | to a different DIE referenced by the specification attribute, | |
20177 | even though the given DIE does not have a declaration attribute. */ | |
20178 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
20179 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
20180 | } |
20181 | ||
63d06c5c | 20182 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 20183 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
20184 | containing the return value on output. If there is no |
20185 | specification, but there is an abstract origin, that is | |
20186 | returned. */ | |
63d06c5c DC |
20187 | |
20188 | static struct die_info * | |
f2f0e013 | 20189 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 20190 | { |
f2f0e013 DJ |
20191 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
20192 | *spec_cu); | |
63d06c5c | 20193 | |
edb3359d DJ |
20194 | if (spec_attr == NULL) |
20195 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
20196 | ||
63d06c5c DC |
20197 | if (spec_attr == NULL) |
20198 | return NULL; | |
20199 | else | |
f2f0e013 | 20200 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 20201 | } |
c906108c | 20202 | |
527f3840 JK |
20203 | /* Stub for free_line_header to match void * callback types. */ |
20204 | ||
20205 | static void | |
20206 | free_line_header_voidp (void *arg) | |
20207 | { | |
9a3c8263 | 20208 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 20209 | |
fff8551c | 20210 | delete lh; |
527f3840 JK |
20211 | } |
20212 | ||
fff8551c PA |
20213 | void |
20214 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 20215 | { |
27e0867f | 20216 | if (dwarf_line_debug >= 2) |
fff8551c PA |
20217 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
20218 | include_dirs.size () + 1, include_dir); | |
27e0867f | 20219 | |
fff8551c | 20220 | include_dirs.push_back (include_dir); |
debd256d | 20221 | } |
6e70227d | 20222 | |
fff8551c PA |
20223 | void |
20224 | line_header::add_file_name (const char *name, | |
ecfb656c | 20225 | dir_index d_index, |
fff8551c PA |
20226 | unsigned int mod_time, |
20227 | unsigned int length) | |
debd256d | 20228 | { |
27e0867f DE |
20229 | if (dwarf_line_debug >= 2) |
20230 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 20231 | (unsigned) file_names.size () + 1, name); |
27e0867f | 20232 | |
ecfb656c | 20233 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 20234 | } |
6e70227d | 20235 | |
83769d0b | 20236 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
20237 | |
20238 | static struct dwarf2_section_info * | |
20239 | get_debug_line_section (struct dwarf2_cu *cu) | |
20240 | { | |
20241 | struct dwarf2_section_info *section; | |
518817b3 SM |
20242 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20243 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
20244 | |
20245 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
20246 | DWO file. */ | |
20247 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
20248 | section = &cu->dwo_unit->dwo_file->sections.line; | |
20249 | else if (cu->per_cu->is_dwz) | |
20250 | { | |
ed2dc618 | 20251 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
20252 | |
20253 | section = &dwz->line; | |
20254 | } | |
20255 | else | |
20256 | section = &dwarf2_per_objfile->line; | |
20257 | ||
20258 | return section; | |
20259 | } | |
20260 | ||
43988095 JK |
20261 | /* Read directory or file name entry format, starting with byte of |
20262 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
20263 | entries count and the entries themselves in the described entry | |
20264 | format. */ | |
20265 | ||
20266 | static void | |
ed2dc618 SM |
20267 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
20268 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
20269 | struct line_header *lh, |
20270 | const struct comp_unit_head *cu_header, | |
20271 | void (*callback) (struct line_header *lh, | |
20272 | const char *name, | |
ecfb656c | 20273 | dir_index d_index, |
43988095 JK |
20274 | unsigned int mod_time, |
20275 | unsigned int length)) | |
20276 | { | |
20277 | gdb_byte format_count, formati; | |
20278 | ULONGEST data_count, datai; | |
20279 | const gdb_byte *buf = *bufp; | |
20280 | const gdb_byte *format_header_data; | |
43988095 JK |
20281 | unsigned int bytes_read; |
20282 | ||
20283 | format_count = read_1_byte (abfd, buf); | |
20284 | buf += 1; | |
20285 | format_header_data = buf; | |
20286 | for (formati = 0; formati < format_count; formati++) | |
20287 | { | |
20288 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20289 | buf += bytes_read; | |
20290 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20291 | buf += bytes_read; | |
20292 | } | |
20293 | ||
20294 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20295 | buf += bytes_read; | |
20296 | for (datai = 0; datai < data_count; datai++) | |
20297 | { | |
20298 | const gdb_byte *format = format_header_data; | |
20299 | struct file_entry fe; | |
20300 | ||
43988095 JK |
20301 | for (formati = 0; formati < format_count; formati++) |
20302 | { | |
ecfb656c | 20303 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20304 | format += bytes_read; |
43988095 | 20305 | |
ecfb656c | 20306 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20307 | format += bytes_read; |
ecfb656c PA |
20308 | |
20309 | gdb::optional<const char *> string; | |
20310 | gdb::optional<unsigned int> uint; | |
20311 | ||
43988095 JK |
20312 | switch (form) |
20313 | { | |
20314 | case DW_FORM_string: | |
ecfb656c | 20315 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
20316 | buf += bytes_read; |
20317 | break; | |
20318 | ||
20319 | case DW_FORM_line_strp: | |
ed2dc618 SM |
20320 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
20321 | abfd, buf, | |
ecfb656c PA |
20322 | cu_header, |
20323 | &bytes_read)); | |
43988095 JK |
20324 | buf += bytes_read; |
20325 | break; | |
20326 | ||
20327 | case DW_FORM_data1: | |
ecfb656c | 20328 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
20329 | buf += 1; |
20330 | break; | |
20331 | ||
20332 | case DW_FORM_data2: | |
ecfb656c | 20333 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
20334 | buf += 2; |
20335 | break; | |
20336 | ||
20337 | case DW_FORM_data4: | |
ecfb656c | 20338 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
20339 | buf += 4; |
20340 | break; | |
20341 | ||
20342 | case DW_FORM_data8: | |
ecfb656c | 20343 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
20344 | buf += 8; |
20345 | break; | |
20346 | ||
20347 | case DW_FORM_udata: | |
ecfb656c | 20348 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
20349 | buf += bytes_read; |
20350 | break; | |
20351 | ||
20352 | case DW_FORM_block: | |
20353 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
20354 | current GDB. */ | |
20355 | break; | |
20356 | } | |
ecfb656c PA |
20357 | |
20358 | switch (content_type) | |
20359 | { | |
20360 | case DW_LNCT_path: | |
20361 | if (string.has_value ()) | |
20362 | fe.name = *string; | |
20363 | break; | |
20364 | case DW_LNCT_directory_index: | |
20365 | if (uint.has_value ()) | |
20366 | fe.d_index = (dir_index) *uint; | |
20367 | break; | |
20368 | case DW_LNCT_timestamp: | |
20369 | if (uint.has_value ()) | |
20370 | fe.mod_time = *uint; | |
20371 | break; | |
20372 | case DW_LNCT_size: | |
20373 | if (uint.has_value ()) | |
20374 | fe.length = *uint; | |
20375 | break; | |
20376 | case DW_LNCT_MD5: | |
20377 | break; | |
20378 | default: | |
b98664d3 | 20379 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
20380 | pulongest (content_type)); |
20381 | } | |
43988095 JK |
20382 | } |
20383 | ||
ecfb656c | 20384 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
20385 | } |
20386 | ||
20387 | *bufp = buf; | |
20388 | } | |
20389 | ||
debd256d | 20390 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20391 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20392 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20393 | Returns NULL if there is a problem reading the header, e.g., if it |
20394 | has a version we don't understand. | |
debd256d JB |
20395 | |
20396 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20397 | the returned object point into the dwarf line section buffer, |
20398 | and must not be freed. */ | |
ae2de4f8 | 20399 | |
fff8551c | 20400 | static line_header_up |
9c541725 | 20401 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20402 | { |
d521ce57 | 20403 | const gdb_byte *line_ptr; |
c764a876 | 20404 | unsigned int bytes_read, offset_size; |
debd256d | 20405 | int i; |
d521ce57 | 20406 | const char *cur_dir, *cur_file; |
3019eac3 DE |
20407 | struct dwarf2_section_info *section; |
20408 | bfd *abfd; | |
518817b3 SM |
20409 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20410 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20411 | |
36586728 | 20412 | section = get_debug_line_section (cu); |
3019eac3 DE |
20413 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
20414 | if (section->buffer == NULL) | |
debd256d | 20415 | { |
3019eac3 | 20416 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20417 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20418 | else |
b98664d3 | 20419 | complaint (_("missing .debug_line section")); |
debd256d JB |
20420 | return 0; |
20421 | } | |
20422 | ||
fceca515 DE |
20423 | /* We can't do this until we know the section is non-empty. |
20424 | Only then do we know we have such a section. */ | |
a32a8923 | 20425 | abfd = get_section_bfd_owner (section); |
fceca515 | 20426 | |
a738430d MK |
20427 | /* Make sure that at least there's room for the total_length field. |
20428 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 20429 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 20430 | { |
4d3c2250 | 20431 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20432 | return 0; |
20433 | } | |
20434 | ||
fff8551c | 20435 | line_header_up lh (new line_header ()); |
debd256d | 20436 | |
9c541725 | 20437 | lh->sect_off = sect_off; |
527f3840 JK |
20438 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
20439 | ||
9c541725 | 20440 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 20441 | |
a738430d | 20442 | /* Read in the header. */ |
6e70227d | 20443 | lh->total_length = |
c764a876 DE |
20444 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
20445 | &bytes_read, &offset_size); | |
debd256d | 20446 | line_ptr += bytes_read; |
3019eac3 | 20447 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 20448 | { |
4d3c2250 | 20449 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20450 | return 0; |
20451 | } | |
20452 | lh->statement_program_end = line_ptr + lh->total_length; | |
20453 | lh->version = read_2_bytes (abfd, line_ptr); | |
20454 | line_ptr += 2; | |
43988095 | 20455 | if (lh->version > 5) |
cd366ee8 DE |
20456 | { |
20457 | /* This is a version we don't understand. The format could have | |
20458 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 20459 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
20460 | return NULL; |
20461 | } | |
43988095 JK |
20462 | if (lh->version >= 5) |
20463 | { | |
20464 | gdb_byte segment_selector_size; | |
20465 | ||
20466 | /* Skip address size. */ | |
20467 | read_1_byte (abfd, line_ptr); | |
20468 | line_ptr += 1; | |
20469 | ||
20470 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
20471 | line_ptr += 1; | |
20472 | if (segment_selector_size != 0) | |
20473 | { | |
b98664d3 | 20474 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
20475 | "in .debug_line section"), |
20476 | segment_selector_size); | |
20477 | return NULL; | |
20478 | } | |
20479 | } | |
c764a876 DE |
20480 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
20481 | line_ptr += offset_size; | |
debd256d JB |
20482 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
20483 | line_ptr += 1; | |
2dc7f7b3 TT |
20484 | if (lh->version >= 4) |
20485 | { | |
20486 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
20487 | line_ptr += 1; | |
20488 | } | |
20489 | else | |
20490 | lh->maximum_ops_per_instruction = 1; | |
20491 | ||
20492 | if (lh->maximum_ops_per_instruction == 0) | |
20493 | { | |
20494 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 20495 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 20496 | "in `.debug_line' section")); |
2dc7f7b3 TT |
20497 | } |
20498 | ||
debd256d JB |
20499 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
20500 | line_ptr += 1; | |
20501 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
20502 | line_ptr += 1; | |
20503 | lh->line_range = read_1_byte (abfd, line_ptr); | |
20504 | line_ptr += 1; | |
20505 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
20506 | line_ptr += 1; | |
fff8551c | 20507 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
20508 | |
20509 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
20510 | for (i = 1; i < lh->opcode_base; ++i) | |
20511 | { | |
20512 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
20513 | line_ptr += 1; | |
20514 | } | |
20515 | ||
43988095 | 20516 | if (lh->version >= 5) |
debd256d | 20517 | { |
43988095 | 20518 | /* Read directory table. */ |
ed2dc618 SM |
20519 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20520 | &cu->header, | |
b926417a | 20521 | [] (struct line_header *header, const char *name, |
ecfb656c | 20522 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20523 | unsigned int length) |
20524 | { | |
b926417a | 20525 | header->add_include_dir (name); |
fff8551c | 20526 | }); |
debd256d | 20527 | |
43988095 | 20528 | /* Read file name table. */ |
ed2dc618 SM |
20529 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20530 | &cu->header, | |
b926417a | 20531 | [] (struct line_header *header, const char *name, |
ecfb656c | 20532 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20533 | unsigned int length) |
20534 | { | |
b926417a | 20535 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 20536 | }); |
43988095 JK |
20537 | } |
20538 | else | |
debd256d | 20539 | { |
43988095 JK |
20540 | /* Read directory table. */ |
20541 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20542 | { | |
20543 | line_ptr += bytes_read; | |
fff8551c | 20544 | lh->add_include_dir (cur_dir); |
43988095 | 20545 | } |
debd256d JB |
20546 | line_ptr += bytes_read; |
20547 | ||
43988095 JK |
20548 | /* Read file name table. */ |
20549 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20550 | { | |
ecfb656c PA |
20551 | unsigned int mod_time, length; |
20552 | dir_index d_index; | |
43988095 JK |
20553 | |
20554 | line_ptr += bytes_read; | |
ecfb656c | 20555 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
20556 | line_ptr += bytes_read; |
20557 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20558 | line_ptr += bytes_read; | |
20559 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20560 | line_ptr += bytes_read; | |
20561 | ||
ecfb656c | 20562 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
20563 | } |
20564 | line_ptr += bytes_read; | |
debd256d | 20565 | } |
6e70227d | 20566 | lh->statement_program_start = line_ptr; |
debd256d | 20567 | |
3019eac3 | 20568 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 20569 | complaint (_("line number info header doesn't " |
3e43a32a | 20570 | "fit in `.debug_line' section")); |
debd256d | 20571 | |
debd256d JB |
20572 | return lh; |
20573 | } | |
c906108c | 20574 | |
c6da4cef DE |
20575 | /* Subroutine of dwarf_decode_lines to simplify it. |
20576 | Return the file name of the psymtab for included file FILE_INDEX | |
20577 | in line header LH of PST. | |
20578 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
c89b44cd TT |
20579 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20580 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20581 | |
d521ce57 | 20582 | static const char * |
c6da4cef DE |
20583 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
20584 | const struct partial_symtab *pst, | |
c89b44cd TT |
20585 | const char *comp_dir, |
20586 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20587 | { |
8c43009f | 20588 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
20589 | const char *include_name = fe.name; |
20590 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20591 | const char *pst_filename; |
c6da4cef DE |
20592 | int file_is_pst; |
20593 | ||
8c43009f | 20594 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20595 | |
c89b44cd | 20596 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20597 | if (!IS_ABSOLUTE_PATH (include_name) |
20598 | && (dir_name != NULL || comp_dir != NULL)) | |
20599 | { | |
20600 | /* Avoid creating a duplicate psymtab for PST. | |
20601 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20602 | Before we do the comparison, however, we need to account | |
20603 | for DIR_NAME and COMP_DIR. | |
20604 | First prepend dir_name (if non-NULL). If we still don't | |
20605 | have an absolute path prepend comp_dir (if non-NULL). | |
20606 | However, the directory we record in the include-file's | |
20607 | psymtab does not contain COMP_DIR (to match the | |
20608 | corresponding symtab(s)). | |
20609 | ||
20610 | Example: | |
20611 | ||
20612 | bash$ cd /tmp | |
20613 | bash$ gcc -g ./hello.c | |
20614 | include_name = "hello.c" | |
20615 | dir_name = "." | |
20616 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20617 | DW_AT_name = "./hello.c" |
20618 | ||
20619 | */ | |
c6da4cef DE |
20620 | |
20621 | if (dir_name != NULL) | |
20622 | { | |
c89b44cd TT |
20623 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20624 | include_name, (char *) NULL)); | |
20625 | include_name = name_holder->get (); | |
c6da4cef | 20626 | include_name_to_compare = include_name; |
c6da4cef DE |
20627 | } |
20628 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20629 | { | |
c89b44cd TT |
20630 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20631 | include_name, (char *) NULL)); | |
20632 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20633 | } |
20634 | } | |
20635 | ||
20636 | pst_filename = pst->filename; | |
c89b44cd | 20637 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20638 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20639 | { | |
c89b44cd TT |
20640 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20641 | pst_filename, (char *) NULL)); | |
20642 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20643 | } |
20644 | ||
1e3fad37 | 20645 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20646 | |
c6da4cef DE |
20647 | if (file_is_pst) |
20648 | return NULL; | |
20649 | return include_name; | |
20650 | } | |
20651 | ||
d9b3de22 DE |
20652 | /* State machine to track the state of the line number program. */ |
20653 | ||
6f77053d | 20654 | class lnp_state_machine |
d9b3de22 | 20655 | { |
6f77053d PA |
20656 | public: |
20657 | /* Initialize a machine state for the start of a line number | |
20658 | program. */ | |
804d2729 TT |
20659 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20660 | bool record_lines_p); | |
6f77053d | 20661 | |
8c43009f PA |
20662 | file_entry *current_file () |
20663 | { | |
20664 | /* lh->file_names is 0-based, but the file name numbers in the | |
20665 | statement program are 1-based. */ | |
6f77053d PA |
20666 | return m_line_header->file_name_at (m_file); |
20667 | } | |
20668 | ||
20669 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20670 | we're processing the end of a sequence. */ | |
20671 | void record_line (bool end_sequence); | |
20672 | ||
7ab6656f OJ |
20673 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
20674 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
20675 | void check_line_address (struct dwarf2_cu *cu, |
20676 | const gdb_byte *line_ptr, | |
7ab6656f | 20677 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20678 | |
20679 | void handle_set_discriminator (unsigned int discriminator) | |
20680 | { | |
20681 | m_discriminator = discriminator; | |
20682 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20683 | } | |
20684 | ||
20685 | /* Handle DW_LNE_set_address. */ | |
20686 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20687 | { | |
20688 | m_op_index = 0; | |
20689 | address += baseaddr; | |
20690 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20691 | } | |
20692 | ||
20693 | /* Handle DW_LNS_advance_pc. */ | |
20694 | void handle_advance_pc (CORE_ADDR adjust); | |
20695 | ||
20696 | /* Handle a special opcode. */ | |
20697 | void handle_special_opcode (unsigned char op_code); | |
20698 | ||
20699 | /* Handle DW_LNS_advance_line. */ | |
20700 | void handle_advance_line (int line_delta) | |
20701 | { | |
20702 | advance_line (line_delta); | |
20703 | } | |
20704 | ||
20705 | /* Handle DW_LNS_set_file. */ | |
20706 | void handle_set_file (file_name_index file); | |
20707 | ||
20708 | /* Handle DW_LNS_negate_stmt. */ | |
20709 | void handle_negate_stmt () | |
20710 | { | |
20711 | m_is_stmt = !m_is_stmt; | |
20712 | } | |
20713 | ||
20714 | /* Handle DW_LNS_const_add_pc. */ | |
20715 | void handle_const_add_pc (); | |
20716 | ||
20717 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20718 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20719 | { | |
20720 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20721 | m_op_index = 0; | |
20722 | } | |
20723 | ||
20724 | /* Handle DW_LNS_copy. */ | |
20725 | void handle_copy () | |
20726 | { | |
20727 | record_line (false); | |
20728 | m_discriminator = 0; | |
20729 | } | |
20730 | ||
20731 | /* Handle DW_LNE_end_sequence. */ | |
20732 | void handle_end_sequence () | |
20733 | { | |
804d2729 | 20734 | m_currently_recording_lines = true; |
6f77053d PA |
20735 | } |
20736 | ||
20737 | private: | |
20738 | /* Advance the line by LINE_DELTA. */ | |
20739 | void advance_line (int line_delta) | |
20740 | { | |
20741 | m_line += line_delta; | |
20742 | ||
20743 | if (line_delta != 0) | |
20744 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20745 | } |
20746 | ||
804d2729 TT |
20747 | struct dwarf2_cu *m_cu; |
20748 | ||
6f77053d PA |
20749 | gdbarch *m_gdbarch; |
20750 | ||
20751 | /* True if we're recording lines. | |
20752 | Otherwise we're building partial symtabs and are just interested in | |
20753 | finding include files mentioned by the line number program. */ | |
20754 | bool m_record_lines_p; | |
20755 | ||
8c43009f | 20756 | /* The line number header. */ |
6f77053d | 20757 | line_header *m_line_header; |
8c43009f | 20758 | |
6f77053d PA |
20759 | /* These are part of the standard DWARF line number state machine, |
20760 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20761 | |
6f77053d | 20762 | unsigned char m_op_index = 0; |
8c43009f | 20763 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
20764 | file_name_index m_file = (file_name_index) 1; |
20765 | unsigned int m_line = 1; | |
20766 | ||
20767 | /* These are initialized in the constructor. */ | |
20768 | ||
20769 | CORE_ADDR m_address; | |
20770 | bool m_is_stmt; | |
20771 | unsigned int m_discriminator; | |
d9b3de22 DE |
20772 | |
20773 | /* Additional bits of state we need to track. */ | |
20774 | ||
20775 | /* The last file that we called dwarf2_start_subfile for. | |
20776 | This is only used for TLLs. */ | |
6f77053d | 20777 | unsigned int m_last_file = 0; |
d9b3de22 | 20778 | /* The last file a line number was recorded for. */ |
6f77053d | 20779 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 20780 | |
804d2729 TT |
20781 | /* When true, record the lines we decode. */ |
20782 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
20783 | |
20784 | /* The last line number that was recorded, used to coalesce | |
20785 | consecutive entries for the same line. This can happen, for | |
20786 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20787 | unsigned int m_last_line = 0; |
20788 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20789 | }; |
d9b3de22 | 20790 | |
6f77053d PA |
20791 | void |
20792 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20793 | { | |
20794 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20795 | / m_line_header->maximum_ops_per_instruction) | |
20796 | * m_line_header->minimum_instruction_length); | |
20797 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20798 | m_op_index = ((m_op_index + adjust) | |
20799 | % m_line_header->maximum_ops_per_instruction); | |
20800 | } | |
d9b3de22 | 20801 | |
6f77053d PA |
20802 | void |
20803 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20804 | { |
6f77053d PA |
20805 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
20806 | CORE_ADDR addr_adj = (((m_op_index | |
20807 | + (adj_opcode / m_line_header->line_range)) | |
20808 | / m_line_header->maximum_ops_per_instruction) | |
20809 | * m_line_header->minimum_instruction_length); | |
20810 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20811 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
20812 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 20813 | |
6f77053d PA |
20814 | int line_delta = (m_line_header->line_base |
20815 | + (adj_opcode % m_line_header->line_range)); | |
20816 | advance_line (line_delta); | |
20817 | record_line (false); | |
20818 | m_discriminator = 0; | |
20819 | } | |
d9b3de22 | 20820 | |
6f77053d PA |
20821 | void |
20822 | lnp_state_machine::handle_set_file (file_name_index file) | |
20823 | { | |
20824 | m_file = file; | |
20825 | ||
20826 | const file_entry *fe = current_file (); | |
20827 | if (fe == NULL) | |
20828 | dwarf2_debug_line_missing_file_complaint (); | |
20829 | else if (m_record_lines_p) | |
20830 | { | |
20831 | const char *dir = fe->include_dir (m_line_header); | |
20832 | ||
c24bdb02 | 20833 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20834 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 20835 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
20836 | } |
20837 | } | |
20838 | ||
20839 | void | |
20840 | lnp_state_machine::handle_const_add_pc () | |
20841 | { | |
20842 | CORE_ADDR adjust | |
20843 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20844 | ||
20845 | CORE_ADDR addr_adj | |
20846 | = (((m_op_index + adjust) | |
20847 | / m_line_header->maximum_ops_per_instruction) | |
20848 | * m_line_header->minimum_instruction_length); | |
20849 | ||
20850 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20851 | m_op_index = ((m_op_index + adjust) | |
20852 | % m_line_header->maximum_ops_per_instruction); | |
20853 | } | |
d9b3de22 | 20854 | |
a05a36a5 DE |
20855 | /* Return non-zero if we should add LINE to the line number table. |
20856 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20857 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20858 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20859 | had a non-zero discriminator. | |
20860 | ||
20861 | We have to be careful in the presence of discriminators. | |
20862 | E.g., for this line: | |
20863 | ||
20864 | for (i = 0; i < 100000; i++); | |
20865 | ||
20866 | clang can emit four line number entries for that one line, | |
20867 | each with a different discriminator. | |
20868 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20869 | ||
20870 | However, we want gdb to coalesce all four entries into one. | |
20871 | Otherwise the user could stepi into the middle of the line and | |
20872 | gdb would get confused about whether the pc really was in the | |
20873 | middle of the line. | |
20874 | ||
20875 | Things are further complicated by the fact that two consecutive | |
20876 | line number entries for the same line is a heuristic used by gcc | |
20877 | to denote the end of the prologue. So we can't just discard duplicate | |
20878 | entries, we have to be selective about it. The heuristic we use is | |
20879 | that we only collapse consecutive entries for the same line if at least | |
20880 | one of those entries has a non-zero discriminator. PR 17276. | |
20881 | ||
20882 | Note: Addresses in the line number state machine can never go backwards | |
20883 | within one sequence, thus this coalescing is ok. */ | |
20884 | ||
20885 | static int | |
804d2729 TT |
20886 | dwarf_record_line_p (struct dwarf2_cu *cu, |
20887 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
20888 | int line_has_non_zero_discriminator, |
20889 | struct subfile *last_subfile) | |
20890 | { | |
c24bdb02 | 20891 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
20892 | return 1; |
20893 | if (line != last_line) | |
20894 | return 1; | |
20895 | /* Same line for the same file that we've seen already. | |
20896 | As a last check, for pr 17276, only record the line if the line | |
20897 | has never had a non-zero discriminator. */ | |
20898 | if (!line_has_non_zero_discriminator) | |
20899 | return 1; | |
20900 | return 0; | |
20901 | } | |
20902 | ||
804d2729 TT |
20903 | /* Use the CU's builder to record line number LINE beginning at |
20904 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20905 | |
20906 | static void | |
d9b3de22 DE |
20907 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
20908 | unsigned int line, CORE_ADDR address, | |
804d2729 | 20909 | struct dwarf2_cu *cu) |
252a6764 DE |
20910 | { |
20911 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20912 | ||
27e0867f DE |
20913 | if (dwarf_line_debug) |
20914 | { | |
20915 | fprintf_unfiltered (gdb_stdlog, | |
20916 | "Recording line %u, file %s, address %s\n", | |
20917 | line, lbasename (subfile->name), | |
20918 | paddress (gdbarch, address)); | |
20919 | } | |
20920 | ||
804d2729 | 20921 | if (cu != nullptr) |
c24bdb02 | 20922 | cu->get_builder ()->record_line (subfile, line, addr); |
252a6764 DE |
20923 | } |
20924 | ||
20925 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20926 | Mark the end of a set of line number records. | |
d9b3de22 | 20927 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20928 | If SUBFILE is NULL the request is ignored. */ |
20929 | ||
20930 | static void | |
20931 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 20932 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 20933 | { |
27e0867f DE |
20934 | if (subfile == NULL) |
20935 | return; | |
20936 | ||
20937 | if (dwarf_line_debug) | |
20938 | { | |
20939 | fprintf_unfiltered (gdb_stdlog, | |
20940 | "Finishing current line, file %s, address %s\n", | |
20941 | lbasename (subfile->name), | |
20942 | paddress (gdbarch, address)); | |
20943 | } | |
20944 | ||
804d2729 | 20945 | dwarf_record_line_1 (gdbarch, subfile, 0, address, cu); |
d9b3de22 DE |
20946 | } |
20947 | ||
6f77053d PA |
20948 | void |
20949 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20950 | { |
d9b3de22 DE |
20951 | if (dwarf_line_debug) |
20952 | { | |
20953 | fprintf_unfiltered (gdb_stdlog, | |
20954 | "Processing actual line %u: file %u," | |
20955 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
20956 | m_line, to_underlying (m_file), |
20957 | paddress (m_gdbarch, m_address), | |
20958 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
20959 | } |
20960 | ||
6f77053d | 20961 | file_entry *fe = current_file (); |
8c43009f PA |
20962 | |
20963 | if (fe == NULL) | |
d9b3de22 DE |
20964 | dwarf2_debug_line_missing_file_complaint (); |
20965 | /* For now we ignore lines not starting on an instruction boundary. | |
20966 | But not when processing end_sequence for compatibility with the | |
20967 | previous version of the code. */ | |
6f77053d | 20968 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20969 | { |
8c43009f | 20970 | fe->included_p = 1; |
c258c396 | 20971 | if (m_record_lines_p && (producer_is_codewarrior (m_cu) || m_is_stmt)) |
d9b3de22 | 20972 | { |
c24bdb02 | 20973 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 20974 | || end_sequence) |
d9b3de22 | 20975 | { |
804d2729 TT |
20976 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
20977 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
20978 | } |
20979 | ||
20980 | if (!end_sequence) | |
20981 | { | |
804d2729 | 20982 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
20983 | m_line_has_non_zero_discriminator, |
20984 | m_last_subfile)) | |
d9b3de22 | 20985 | { |
c24bdb02 | 20986 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 20987 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 20988 | builder->get_current_subfile (), |
6f77053d | 20989 | m_line, m_address, |
804d2729 | 20990 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 20991 | } |
c24bdb02 | 20992 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20993 | m_last_line = m_line; |
d9b3de22 DE |
20994 | } |
20995 | } | |
20996 | } | |
20997 | } | |
20998 | ||
804d2729 TT |
20999 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
21000 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 21001 | { |
804d2729 | 21002 | m_cu = cu; |
6f77053d PA |
21003 | m_gdbarch = arch; |
21004 | m_record_lines_p = record_lines_p; | |
21005 | m_line_header = lh; | |
d9b3de22 | 21006 | |
804d2729 | 21007 | m_currently_recording_lines = true; |
d9b3de22 | 21008 | |
d9b3de22 DE |
21009 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
21010 | was a line entry for it so that the backend has a chance to adjust it | |
21011 | and also record it in case it needs it. This is currently used by MIPS | |
21012 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
21013 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
21014 | m_is_stmt = lh->default_is_stmt; | |
21015 | m_discriminator = 0; | |
252a6764 DE |
21016 | } |
21017 | ||
6f77053d PA |
21018 | void |
21019 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
21020 | const gdb_byte *line_ptr, | |
7ab6656f | 21021 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 21022 | { |
7ab6656f OJ |
21023 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
21024 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
21025 | values of zero to preserve GDB's previous behaviour which is to handle | |
21026 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 21027 | |
7ab6656f | 21028 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
21029 | { |
21030 | /* This line table is for a function which has been | |
21031 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
21032 | ||
518817b3 | 21033 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
21034 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
21035 | ||
b98664d3 | 21036 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 21037 | line_offset, objfile_name (objfile)); |
804d2729 TT |
21038 | m_currently_recording_lines = false; |
21039 | /* Note: m_currently_recording_lines is left as false until we see | |
21040 | DW_LNE_end_sequence. */ | |
924c2928 DE |
21041 | } |
21042 | } | |
21043 | ||
f3f5162e | 21044 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
21045 | Process the line number information in LH. |
21046 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
21047 | program in order to set included_p for every referenced header. */ | |
debd256d | 21048 | |
c906108c | 21049 | static void |
43f3e411 DE |
21050 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
21051 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 21052 | { |
d521ce57 TT |
21053 | const gdb_byte *line_ptr, *extended_end; |
21054 | const gdb_byte *line_end; | |
a8c50c1f | 21055 | unsigned int bytes_read, extended_len; |
699ca60a | 21056 | unsigned char op_code, extended_op; |
e142c38c | 21057 | CORE_ADDR baseaddr; |
518817b3 | 21058 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21059 | bfd *abfd = objfile->obfd; |
fbf65064 | 21060 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
21061 | /* True if we're recording line info (as opposed to building partial |
21062 | symtabs and just interested in finding include files mentioned by | |
21063 | the line number program). */ | |
21064 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
21065 | |
21066 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21067 | |
debd256d JB |
21068 | line_ptr = lh->statement_program_start; |
21069 | line_end = lh->statement_program_end; | |
c906108c SS |
21070 | |
21071 | /* Read the statement sequences until there's nothing left. */ | |
21072 | while (line_ptr < line_end) | |
21073 | { | |
6f77053d PA |
21074 | /* The DWARF line number program state machine. Reset the state |
21075 | machine at the start of each sequence. */ | |
804d2729 | 21076 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 21077 | bool end_sequence = false; |
d9b3de22 | 21078 | |
8c43009f | 21079 | if (record_lines_p) |
c906108c | 21080 | { |
8c43009f PA |
21081 | /* Start a subfile for the current file of the state |
21082 | machine. */ | |
21083 | const file_entry *fe = state_machine.current_file (); | |
21084 | ||
21085 | if (fe != NULL) | |
804d2729 | 21086 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
21087 | } |
21088 | ||
a738430d | 21089 | /* Decode the table. */ |
d9b3de22 | 21090 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
21091 | { |
21092 | op_code = read_1_byte (abfd, line_ptr); | |
21093 | line_ptr += 1; | |
9aa1fe7e | 21094 | |
debd256d | 21095 | if (op_code >= lh->opcode_base) |
6e70227d | 21096 | { |
8e07a239 | 21097 | /* Special opcode. */ |
6f77053d | 21098 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
21099 | } |
21100 | else switch (op_code) | |
c906108c SS |
21101 | { |
21102 | case DW_LNS_extended_op: | |
3e43a32a MS |
21103 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
21104 | &bytes_read); | |
473b7be6 | 21105 | line_ptr += bytes_read; |
a8c50c1f | 21106 | extended_end = line_ptr + extended_len; |
c906108c SS |
21107 | extended_op = read_1_byte (abfd, line_ptr); |
21108 | line_ptr += 1; | |
21109 | switch (extended_op) | |
21110 | { | |
21111 | case DW_LNE_end_sequence: | |
6f77053d PA |
21112 | state_machine.handle_end_sequence (); |
21113 | end_sequence = true; | |
c906108c SS |
21114 | break; |
21115 | case DW_LNE_set_address: | |
d9b3de22 DE |
21116 | { |
21117 | CORE_ADDR address | |
21118 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 21119 | line_ptr += bytes_read; |
6f77053d PA |
21120 | |
21121 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 21122 | lowpc - baseaddr, address); |
6f77053d | 21123 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 21124 | } |
c906108c SS |
21125 | break; |
21126 | case DW_LNE_define_file: | |
debd256d | 21127 | { |
d521ce57 | 21128 | const char *cur_file; |
ecfb656c PA |
21129 | unsigned int mod_time, length; |
21130 | dir_index dindex; | |
6e70227d | 21131 | |
3e43a32a MS |
21132 | cur_file = read_direct_string (abfd, line_ptr, |
21133 | &bytes_read); | |
debd256d | 21134 | line_ptr += bytes_read; |
ecfb656c | 21135 | dindex = (dir_index) |
debd256d JB |
21136 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
21137 | line_ptr += bytes_read; | |
21138 | mod_time = | |
21139 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21140 | line_ptr += bytes_read; | |
21141 | length = | |
21142 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21143 | line_ptr += bytes_read; | |
ecfb656c | 21144 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 21145 | } |
c906108c | 21146 | break; |
d0c6ba3d | 21147 | case DW_LNE_set_discriminator: |
6f77053d PA |
21148 | { |
21149 | /* The discriminator is not interesting to the | |
21150 | debugger; just ignore it. We still need to | |
21151 | check its value though: | |
21152 | if there are consecutive entries for the same | |
21153 | (non-prologue) line we want to coalesce them. | |
21154 | PR 17276. */ | |
21155 | unsigned int discr | |
21156 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21157 | line_ptr += bytes_read; | |
21158 | ||
21159 | state_machine.handle_set_discriminator (discr); | |
21160 | } | |
d0c6ba3d | 21161 | break; |
c906108c | 21162 | default: |
b98664d3 | 21163 | complaint (_("mangled .debug_line section")); |
debd256d | 21164 | return; |
c906108c | 21165 | } |
a8c50c1f DJ |
21166 | /* Make sure that we parsed the extended op correctly. If e.g. |
21167 | we expected a different address size than the producer used, | |
21168 | we may have read the wrong number of bytes. */ | |
21169 | if (line_ptr != extended_end) | |
21170 | { | |
b98664d3 | 21171 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
21172 | return; |
21173 | } | |
c906108c SS |
21174 | break; |
21175 | case DW_LNS_copy: | |
6f77053d | 21176 | state_machine.handle_copy (); |
c906108c SS |
21177 | break; |
21178 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
21179 | { |
21180 | CORE_ADDR adjust | |
21181 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 21182 | line_ptr += bytes_read; |
6f77053d PA |
21183 | |
21184 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 21185 | } |
c906108c SS |
21186 | break; |
21187 | case DW_LNS_advance_line: | |
a05a36a5 DE |
21188 | { |
21189 | int line_delta | |
21190 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 21191 | line_ptr += bytes_read; |
6f77053d PA |
21192 | |
21193 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 21194 | } |
c906108c SS |
21195 | break; |
21196 | case DW_LNS_set_file: | |
d9b3de22 | 21197 | { |
6f77053d | 21198 | file_name_index file |
ecfb656c PA |
21199 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
21200 | &bytes_read); | |
d9b3de22 | 21201 | line_ptr += bytes_read; |
8c43009f | 21202 | |
6f77053d | 21203 | state_machine.handle_set_file (file); |
d9b3de22 | 21204 | } |
c906108c SS |
21205 | break; |
21206 | case DW_LNS_set_column: | |
0ad93d4f | 21207 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
21208 | line_ptr += bytes_read; |
21209 | break; | |
21210 | case DW_LNS_negate_stmt: | |
6f77053d | 21211 | state_machine.handle_negate_stmt (); |
c906108c SS |
21212 | break; |
21213 | case DW_LNS_set_basic_block: | |
c906108c | 21214 | break; |
c2c6d25f JM |
21215 | /* Add to the address register of the state machine the |
21216 | address increment value corresponding to special opcode | |
a738430d MK |
21217 | 255. I.e., this value is scaled by the minimum |
21218 | instruction length since special opcode 255 would have | |
b021a221 | 21219 | scaled the increment. */ |
c906108c | 21220 | case DW_LNS_const_add_pc: |
6f77053d | 21221 | state_machine.handle_const_add_pc (); |
c906108c SS |
21222 | break; |
21223 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 21224 | { |
6f77053d | 21225 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 21226 | line_ptr += 2; |
6f77053d PA |
21227 | |
21228 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 21229 | } |
c906108c | 21230 | break; |
9aa1fe7e | 21231 | default: |
a738430d MK |
21232 | { |
21233 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 21234 | int i; |
a738430d | 21235 | |
debd256d | 21236 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
21237 | { |
21238 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21239 | line_ptr += bytes_read; | |
21240 | } | |
21241 | } | |
c906108c SS |
21242 | } |
21243 | } | |
d9b3de22 DE |
21244 | |
21245 | if (!end_sequence) | |
21246 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
21247 | ||
21248 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
21249 | in which case we still finish recording the last line). */ | |
6f77053d | 21250 | state_machine.record_line (true); |
c906108c | 21251 | } |
f3f5162e DE |
21252 | } |
21253 | ||
21254 | /* Decode the Line Number Program (LNP) for the given line_header | |
21255 | structure and CU. The actual information extracted and the type | |
21256 | of structures created from the LNP depends on the value of PST. | |
21257 | ||
21258 | 1. If PST is NULL, then this procedure uses the data from the program | |
21259 | to create all necessary symbol tables, and their linetables. | |
21260 | ||
21261 | 2. If PST is not NULL, this procedure reads the program to determine | |
21262 | the list of files included by the unit represented by PST, and | |
21263 | builds all the associated partial symbol tables. | |
21264 | ||
21265 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
21266 | It is used for relative paths in the line table. | |
21267 | NOTE: When processing partial symtabs (pst != NULL), | |
21268 | comp_dir == pst->dirname. | |
21269 | ||
21270 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
21271 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
21272 | symtab we don't use it in the name of the psymtabs we create. | |
21273 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
21274 | A good testcase for this is mb-inline.exp. |
21275 | ||
527f3840 JK |
21276 | LOWPC is the lowest address in CU (or 0 if not known). |
21277 | ||
21278 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
21279 | for its PC<->lines mapping information. Otherwise only the filename | |
21280 | table is read in. */ | |
f3f5162e DE |
21281 | |
21282 | static void | |
21283 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 21284 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 21285 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 21286 | { |
518817b3 | 21287 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21288 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 21289 | |
527f3840 JK |
21290 | if (decode_mapping) |
21291 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
21292 | |
21293 | if (decode_for_pst_p) | |
21294 | { | |
21295 | int file_index; | |
21296 | ||
21297 | /* Now that we're done scanning the Line Header Program, we can | |
21298 | create the psymtab of each included file. */ | |
fff8551c | 21299 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
21300 | if (lh->file_names[file_index].included_p == 1) |
21301 | { | |
c89b44cd | 21302 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 21303 | const char *include_name = |
c89b44cd TT |
21304 | psymtab_include_file_name (lh, file_index, pst, comp_dir, |
21305 | &name_holder); | |
c6da4cef | 21306 | if (include_name != NULL) |
aaa75496 JB |
21307 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
21308 | } | |
21309 | } | |
cb1df416 DJ |
21310 | else |
21311 | { | |
21312 | /* Make sure a symtab is created for every file, even files | |
21313 | which contain only variables (i.e. no code with associated | |
21314 | line numbers). */ | |
c24bdb02 KS |
21315 | buildsym_compunit *builder = cu->get_builder (); |
21316 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 21317 | int i; |
cb1df416 | 21318 | |
fff8551c | 21319 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 21320 | { |
8c43009f | 21321 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 21322 | |
804d2729 | 21323 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
cb1df416 | 21324 | |
c24bdb02 | 21325 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 21326 | { |
c24bdb02 | 21327 | builder->get_current_subfile ()->symtab |
804d2729 | 21328 | = allocate_symtab (cust, |
c24bdb02 | 21329 | builder->get_current_subfile ()->name); |
43f3e411 | 21330 | } |
c24bdb02 | 21331 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
21332 | } |
21333 | } | |
c906108c SS |
21334 | } |
21335 | ||
21336 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21337 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21338 | or NULL if not known. |
c906108c SS |
21339 | This routine tries to keep line numbers from identical absolute and |
21340 | relative file names in a common subfile. | |
21341 | ||
21342 | Using the `list' example from the GDB testsuite, which resides in | |
21343 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21344 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21345 | ||
c5aa993b | 21346 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21347 | DW_AT_comp_dir: /compdir |
357e46e7 | 21348 | files.files[0].name: list0.h |
c5aa993b | 21349 | files.files[0].dir: /srcdir |
357e46e7 | 21350 | files.files[1].name: list0.c |
c5aa993b | 21351 | files.files[1].dir: /srcdir |
c906108c SS |
21352 | |
21353 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21354 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21355 | start_subfile will ensure that this happens provided that we pass the | |
21356 | concatenation of files.files[1].dir and files.files[1].name as the | |
21357 | subfile's name. */ | |
c906108c SS |
21358 | |
21359 | static void | |
804d2729 TT |
21360 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21361 | const char *dirname) | |
c906108c | 21362 | { |
d521ce57 | 21363 | char *copy = NULL; |
4f1520fb | 21364 | |
4d663531 | 21365 | /* In order not to lose the line information directory, |
4f1520fb FR |
21366 | we concatenate it to the filename when it makes sense. |
21367 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21368 | information): ``The directory index is ignored for file names | |
21369 | that represent full path names''. Thus ignoring dirname in the | |
21370 | `else' branch below isn't an issue. */ | |
c906108c | 21371 | |
d5166ae1 | 21372 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
21373 | { |
21374 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
21375 | filename = copy; | |
21376 | } | |
c906108c | 21377 | |
c24bdb02 | 21378 | cu->get_builder ()->start_subfile (filename); |
4f1520fb | 21379 | |
d521ce57 TT |
21380 | if (copy != NULL) |
21381 | xfree (copy); | |
c906108c SS |
21382 | } |
21383 | ||
804d2729 TT |
21384 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
21385 | buildsym_compunit constructor. */ | |
f4dc4d17 | 21386 | |
c24bdb02 KS |
21387 | struct compunit_symtab * |
21388 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
21389 | CORE_ADDR low_pc) | |
f4dc4d17 | 21390 | { |
c24bdb02 | 21391 | gdb_assert (m_builder == nullptr); |
43f3e411 | 21392 | |
c24bdb02 KS |
21393 | m_builder.reset (new struct buildsym_compunit |
21394 | (per_cu->dwarf2_per_objfile->objfile, | |
21395 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 21396 | |
c24bdb02 | 21397 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 21398 | |
c24bdb02 KS |
21399 | get_builder ()->record_debugformat ("DWARF 2"); |
21400 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 21401 | |
c24bdb02 | 21402 | processing_has_namespace_info = false; |
43f3e411 | 21403 | |
c24bdb02 | 21404 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
21405 | } |
21406 | ||
4c2df51b DJ |
21407 | static void |
21408 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21409 | struct dwarf2_cu *cu) |
4c2df51b | 21410 | { |
518817b3 | 21411 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
21412 | struct comp_unit_head *cu_header = &cu->header; |
21413 | ||
4c2df51b DJ |
21414 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21415 | code here to turn a symbol with DW_AT_external and a | |
21416 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21417 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21418 | with some versions of binutils) where shared libraries could have | |
21419 | relocations against symbols in their debug information - the | |
21420 | minimal symbol would have the right address, but the debug info | |
21421 | would not. It's no longer necessary, because we will explicitly | |
21422 | apply relocations when we read in the debug information now. */ | |
21423 | ||
21424 | /* A DW_AT_location attribute with no contents indicates that a | |
21425 | variable has been optimized away. */ | |
21426 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
21427 | { | |
f1e6e072 | 21428 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21429 | return; |
21430 | } | |
21431 | ||
21432 | /* Handle one degenerate form of location expression specially, to | |
21433 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
21434 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
21435 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
21436 | |
21437 | if (attr_form_is_block (attr) | |
3019eac3 DE |
21438 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
21439 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
21440 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
21441 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
21442 | && (DW_BLOCK (attr)->size |
21443 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 21444 | { |
891d2f0b | 21445 | unsigned int dummy; |
4c2df51b | 21446 | |
3019eac3 DE |
21447 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
21448 | SYMBOL_VALUE_ADDRESS (sym) = | |
21449 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
21450 | else | |
21451 | SYMBOL_VALUE_ADDRESS (sym) = | |
21452 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 21453 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
21454 | fixup_symbol_section (sym, objfile); |
21455 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
21456 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
21457 | return; |
21458 | } | |
21459 | ||
21460 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21461 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21462 | (i.e. when the value of a register or memory location is | |
21463 | referenced, or a thread-local block, etc.). Then again, it might | |
21464 | not be worthwhile. I'm assuming that it isn't unless performance | |
21465 | or memory numbers show me otherwise. */ | |
21466 | ||
f1e6e072 | 21467 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21468 | |
f1e6e072 | 21469 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 21470 | cu->has_loclist = true; |
4c2df51b DJ |
21471 | } |
21472 | ||
c906108c SS |
21473 | /* Given a pointer to a DWARF information entry, figure out if we need |
21474 | to make a symbol table entry for it, and if so, create a new entry | |
21475 | and return a pointer to it. | |
21476 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21477 | used the passed type. |
21478 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21479 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21480 | |
21481 | static struct symbol * | |
5e2db402 TT |
21482 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21483 | struct symbol *space) | |
c906108c | 21484 | { |
518817b3 SM |
21485 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21486 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21487 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 21488 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 21489 | struct symbol *sym = NULL; |
15d034d0 | 21490 | const char *name; |
c906108c SS |
21491 | struct attribute *attr = NULL; |
21492 | struct attribute *attr2 = NULL; | |
e142c38c | 21493 | CORE_ADDR baseaddr; |
e37fd15a SW |
21494 | struct pending **list_to_add = NULL; |
21495 | ||
edb3359d | 21496 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
21497 | |
21498 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 21499 | |
94af9270 | 21500 | name = dwarf2_name (die, cu); |
c906108c SS |
21501 | if (name) |
21502 | { | |
94af9270 | 21503 | const char *linkagename; |
34eaf542 | 21504 | int suppress_add = 0; |
94af9270 | 21505 | |
34eaf542 TT |
21506 | if (space) |
21507 | sym = space; | |
21508 | else | |
e623cf5d | 21509 | sym = allocate_symbol (objfile); |
c906108c | 21510 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21511 | |
21512 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 21513 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
21514 | linkagename = dwarf2_physname (name, die, cu); |
21515 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 21516 | |
f55ee35c JK |
21517 | /* Fortran does not have mangling standard and the mangling does differ |
21518 | between gfortran, iFort etc. */ | |
21519 | if (cu->language == language_fortran | |
b250c185 | 21520 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 21521 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 21522 | dwarf2_full_name (name, die, cu), |
29df156d | 21523 | NULL); |
f55ee35c | 21524 | |
c906108c | 21525 | /* Default assumptions. |
c5aa993b | 21526 | Use the passed type or decode it from the die. */ |
176620f1 | 21527 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21528 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21529 | if (type != NULL) |
21530 | SYMBOL_TYPE (sym) = type; | |
21531 | else | |
e7c27a73 | 21532 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21533 | attr = dwarf2_attr (die, |
21534 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21535 | cu); | |
c906108c SS |
21536 | if (attr) |
21537 | { | |
21538 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
21539 | } | |
cb1df416 | 21540 | |
edb3359d DJ |
21541 | attr = dwarf2_attr (die, |
21542 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21543 | cu); | |
cb1df416 DJ |
21544 | if (attr) |
21545 | { | |
ecfb656c | 21546 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 21547 | struct file_entry *fe; |
9a619af0 | 21548 | |
ecfb656c PA |
21549 | if (cu->line_header != NULL) |
21550 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21551 | else |
21552 | fe = NULL; | |
21553 | ||
21554 | if (fe == NULL) | |
b98664d3 | 21555 | complaint (_("file index out of range")); |
8c43009f PA |
21556 | else |
21557 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21558 | } |
21559 | ||
c906108c SS |
21560 | switch (die->tag) |
21561 | { | |
21562 | case DW_TAG_label: | |
e142c38c | 21563 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 21564 | if (attr) |
3e29f34a MR |
21565 | { |
21566 | CORE_ADDR addr; | |
21567 | ||
21568 | addr = attr_value_as_address (attr); | |
21569 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
21570 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
21571 | } | |
0f5238ed TT |
21572 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21573 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 21574 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 21575 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21576 | break; |
21577 | case DW_TAG_subprogram: | |
21578 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21579 | finish_block. */ | |
f1e6e072 | 21580 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21581 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
21582 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
21583 | || cu->language == language_ada) | |
c906108c | 21584 | { |
2cfa0c8d JB |
21585 | /* Subprograms marked external are stored as a global symbol. |
21586 | Ada subprograms, whether marked external or not, are always | |
21587 | stored as a global symbol, because we want to be able to | |
21588 | access them globally. For instance, we want to be able | |
21589 | to break on a nested subprogram without having to | |
21590 | specify the context. */ | |
c24bdb02 | 21591 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
21592 | } |
21593 | else | |
21594 | { | |
e37fd15a | 21595 | list_to_add = cu->list_in_scope; |
c906108c SS |
21596 | } |
21597 | break; | |
edb3359d DJ |
21598 | case DW_TAG_inlined_subroutine: |
21599 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21600 | finish_block. */ | |
f1e6e072 | 21601 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21602 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21603 | list_to_add = cu->list_in_scope; |
edb3359d | 21604 | break; |
34eaf542 TT |
21605 | case DW_TAG_template_value_param: |
21606 | suppress_add = 1; | |
21607 | /* Fall through. */ | |
72929c62 | 21608 | case DW_TAG_constant: |
c906108c | 21609 | case DW_TAG_variable: |
254e6b9e | 21610 | case DW_TAG_member: |
0963b4bd MS |
21611 | /* Compilation with minimal debug info may result in |
21612 | variables with missing type entries. Change the | |
21613 | misleading `void' type to something sensible. */ | |
c906108c | 21614 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 21615 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21616 | |
e142c38c | 21617 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21618 | /* In the case of DW_TAG_member, we should only be called for |
21619 | static const members. */ | |
21620 | if (die->tag == DW_TAG_member) | |
21621 | { | |
3863f96c DE |
21622 | /* dwarf2_add_field uses die_is_declaration, |
21623 | so we do the same. */ | |
254e6b9e DE |
21624 | gdb_assert (die_is_declaration (die, cu)); |
21625 | gdb_assert (attr); | |
21626 | } | |
c906108c SS |
21627 | if (attr) |
21628 | { | |
e7c27a73 | 21629 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21630 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21631 | if (!suppress_add) |
34eaf542 TT |
21632 | { |
21633 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 21634 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 21635 | else |
e37fd15a | 21636 | list_to_add = cu->list_in_scope; |
34eaf542 | 21637 | } |
c906108c SS |
21638 | break; |
21639 | } | |
e142c38c | 21640 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
21641 | if (attr) |
21642 | { | |
e7c27a73 | 21643 | var_decode_location (attr, sym, cu); |
e142c38c | 21644 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21645 | |
21646 | /* Fortran explicitly imports any global symbols to the local | |
21647 | scope by DW_TAG_common_block. */ | |
21648 | if (cu->language == language_fortran && die->parent | |
21649 | && die->parent->tag == DW_TAG_common_block) | |
21650 | attr2 = NULL; | |
21651 | ||
caac4577 JG |
21652 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21653 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
21654 | && !dwarf2_per_objfile->has_section_at_zero) | |
21655 | { | |
21656 | /* When a static variable is eliminated by the linker, | |
21657 | the corresponding debug information is not stripped | |
21658 | out, but the variable address is set to null; | |
21659 | do not add such variables into symbol table. */ | |
21660 | } | |
21661 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 21662 | { |
f55ee35c JK |
21663 | /* Workaround gfortran PR debug/40040 - it uses |
21664 | DW_AT_location for variables in -fPIC libraries which may | |
21665 | get overriden by other libraries/executable and get | |
21666 | a different address. Resolve it by the minimal symbol | |
21667 | which may come from inferior's executable using copy | |
21668 | relocation. Make this workaround only for gfortran as for | |
21669 | other compilers GDB cannot guess the minimal symbol | |
21670 | Fortran mangling kind. */ | |
21671 | if (cu->language == language_fortran && die->parent | |
21672 | && die->parent->tag == DW_TAG_module | |
21673 | && cu->producer | |
28586665 | 21674 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 21675 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 21676 | |
1c809c68 TT |
21677 | /* A variable with DW_AT_external is never static, |
21678 | but it may be block-scoped. */ | |
804d2729 | 21679 | list_to_add |
c24bdb02 KS |
21680 | = ((cu->list_in_scope |
21681 | == cu->get_builder ()->get_file_symbols ()) | |
21682 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21683 | : cu->list_in_scope); |
1c809c68 | 21684 | } |
c906108c | 21685 | else |
e37fd15a | 21686 | list_to_add = cu->list_in_scope; |
c906108c SS |
21687 | } |
21688 | else | |
21689 | { | |
21690 | /* We do not know the address of this symbol. | |
c5aa993b JM |
21691 | If it is an external symbol and we have type information |
21692 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21693 | The address of the variable will then be determined from | |
21694 | the minimal symbol table whenever the variable is | |
21695 | referenced. */ | |
e142c38c | 21696 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21697 | |
21698 | /* Fortran explicitly imports any global symbols to the local | |
21699 | scope by DW_TAG_common_block. */ | |
21700 | if (cu->language == language_fortran && die->parent | |
21701 | && die->parent->tag == DW_TAG_common_block) | |
21702 | { | |
21703 | /* SYMBOL_CLASS doesn't matter here because | |
21704 | read_common_block is going to reset it. */ | |
21705 | if (!suppress_add) | |
21706 | list_to_add = cu->list_in_scope; | |
21707 | } | |
21708 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
21709 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 21710 | { |
0fe7935b DJ |
21711 | /* A variable with DW_AT_external is never static, but it |
21712 | may be block-scoped. */ | |
804d2729 | 21713 | list_to_add |
c24bdb02 KS |
21714 | = ((cu->list_in_scope |
21715 | == cu->get_builder ()->get_file_symbols ()) | |
21716 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21717 | : cu->list_in_scope); |
0fe7935b | 21718 | |
f1e6e072 | 21719 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21720 | } |
442ddf59 JK |
21721 | else if (!die_is_declaration (die, cu)) |
21722 | { | |
21723 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21724 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21725 | if (!suppress_add) |
21726 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21727 | } |
c906108c SS |
21728 | } |
21729 | break; | |
21730 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
21731 | { |
21732 | /* If we are inside a function, mark this as an argument. If | |
21733 | not, we might be looking at an argument to an inlined function | |
21734 | when we do not have enough information to show inlined frames; | |
21735 | pretend it's a local variable in that case so that the user can | |
21736 | still see it. */ | |
804d2729 | 21737 | struct context_stack *curr |
c24bdb02 | 21738 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
21739 | if (curr != nullptr && curr->name != nullptr) |
21740 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
21741 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
21742 | if (attr) | |
21743 | { | |
21744 | var_decode_location (attr, sym, cu); | |
21745 | } | |
21746 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
21747 | if (attr) | |
21748 | { | |
21749 | dwarf2_const_value (attr, sym, cu); | |
21750 | } | |
f346a30d | 21751 | |
a60f3166 TT |
21752 | list_to_add = cu->list_in_scope; |
21753 | } | |
c906108c SS |
21754 | break; |
21755 | case DW_TAG_unspecified_parameters: | |
21756 | /* From varargs functions; gdb doesn't seem to have any | |
21757 | interest in this information, so just ignore it for now. | |
21758 | (FIXME?) */ | |
21759 | break; | |
34eaf542 TT |
21760 | case DW_TAG_template_type_param: |
21761 | suppress_add = 1; | |
21762 | /* Fall through. */ | |
c906108c | 21763 | case DW_TAG_class_type: |
680b30c7 | 21764 | case DW_TAG_interface_type: |
c906108c SS |
21765 | case DW_TAG_structure_type: |
21766 | case DW_TAG_union_type: | |
72019c9c | 21767 | case DW_TAG_set_type: |
c906108c | 21768 | case DW_TAG_enumeration_type: |
f1e6e072 | 21769 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21770 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21771 | |
63d06c5c | 21772 | { |
9c37b5ae | 21773 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21774 | really ever be static objects: otherwise, if you try |
21775 | to, say, break of a class's method and you're in a file | |
21776 | which doesn't mention that class, it won't work unless | |
21777 | the check for all static symbols in lookup_symbol_aux | |
21778 | saves you. See the OtherFileClass tests in | |
21779 | gdb.c++/namespace.exp. */ | |
21780 | ||
e37fd15a | 21781 | if (!suppress_add) |
34eaf542 | 21782 | { |
c24bdb02 | 21783 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 21784 | list_to_add |
c24bdb02 | 21785 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 21786 | && cu->language == language_cplus |
c24bdb02 | 21787 | ? builder->get_global_symbols () |
804d2729 | 21788 | : cu->list_in_scope); |
63d06c5c | 21789 | |
64382290 | 21790 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21791 | ... }" also defines a typedef for "foo". */ |
64382290 | 21792 | if (cu->language == language_cplus |
45280282 | 21793 | || cu->language == language_ada |
c44af4eb TT |
21794 | || cu->language == language_d |
21795 | || cu->language == language_rust) | |
64382290 TT |
21796 | { |
21797 | /* The symbol's name is already allocated along | |
21798 | with this objfile, so we don't need to | |
21799 | duplicate it for the type. */ | |
21800 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
21801 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
21802 | } | |
63d06c5c DC |
21803 | } |
21804 | } | |
c906108c SS |
21805 | break; |
21806 | case DW_TAG_typedef: | |
f1e6e072 | 21807 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21808 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21809 | list_to_add = cu->list_in_scope; |
63d06c5c | 21810 | break; |
c906108c | 21811 | case DW_TAG_base_type: |
a02abb62 | 21812 | case DW_TAG_subrange_type: |
f1e6e072 | 21813 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21814 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21815 | list_to_add = cu->list_in_scope; |
c906108c SS |
21816 | break; |
21817 | case DW_TAG_enumerator: | |
e142c38c | 21818 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
21819 | if (attr) |
21820 | { | |
e7c27a73 | 21821 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21822 | } |
63d06c5c DC |
21823 | { |
21824 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21825 | DW_TAG_class_type, etc. block. */ | |
21826 | ||
804d2729 | 21827 | list_to_add |
c24bdb02 | 21828 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 21829 | && cu->language == language_cplus |
c24bdb02 | 21830 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 21831 | : cu->list_in_scope); |
63d06c5c | 21832 | } |
c906108c | 21833 | break; |
74921315 | 21834 | case DW_TAG_imported_declaration: |
5c4e30ca | 21835 | case DW_TAG_namespace: |
f1e6e072 | 21836 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 21837 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 21838 | break; |
530e8392 KB |
21839 | case DW_TAG_module: |
21840 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21841 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 21842 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 21843 | break; |
4357ac6c | 21844 | case DW_TAG_common_block: |
f1e6e072 | 21845 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 21846 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 21847 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 21848 | break; |
c906108c SS |
21849 | default: |
21850 | /* Not a tag we recognize. Hopefully we aren't processing | |
21851 | trash data, but since we must specifically ignore things | |
21852 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21853 | this point. */ |
b98664d3 | 21854 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 21855 | dwarf_tag_name (die->tag)); |
c906108c SS |
21856 | break; |
21857 | } | |
df8a16a1 | 21858 | |
e37fd15a SW |
21859 | if (suppress_add) |
21860 | { | |
21861 | sym->hash_next = objfile->template_symbols; | |
21862 | objfile->template_symbols = sym; | |
21863 | list_to_add = NULL; | |
21864 | } | |
21865 | ||
21866 | if (list_to_add != NULL) | |
d3cb6808 | 21867 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 21868 | |
df8a16a1 DJ |
21869 | /* For the benefit of old versions of GCC, check for anonymous |
21870 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21871 | if (!cu->processing_has_namespace_info |
94af9270 | 21872 | && cu->language == language_cplus) |
c24bdb02 | 21873 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
21874 | } |
21875 | return (sym); | |
21876 | } | |
21877 | ||
98bfdba5 PA |
21878 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21879 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21880 | standard (v4) is not entirely clear about the meaning of using | |
21881 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21882 | wider than the data. The conclusion of a discussion on the DWARF | |
21883 | list was that this is unspecified. We choose to always zero-extend | |
21884 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21885 | |
98bfdba5 | 21886 | static gdb_byte * |
ff39bb5e | 21887 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21888 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21889 | { |
518817b3 | 21890 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
21891 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21892 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
21893 | LONGEST l = DW_UNSND (attr); |
21894 | ||
21895 | if (bits < sizeof (*value) * 8) | |
21896 | { | |
21897 | l &= ((LONGEST) 1 << bits) - 1; | |
21898 | *value = l; | |
21899 | } | |
21900 | else if (bits == sizeof (*value) * 8) | |
21901 | *value = l; | |
21902 | else | |
21903 | { | |
224c3ddb | 21904 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21905 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21906 | return bytes; | |
21907 | } | |
21908 | ||
21909 | return NULL; | |
21910 | } | |
21911 | ||
21912 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21913 | the value does not fit in *VALUE, set *BYTES - either already | |
21914 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21915 | or, set *BATON, if we translated the constant to a location | |
21916 | expression. */ | |
21917 | ||
21918 | static void | |
ff39bb5e | 21919 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21920 | const char *name, struct obstack *obstack, |
21921 | struct dwarf2_cu *cu, | |
d521ce57 | 21922 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21923 | struct dwarf2_locexpr_baton **baton) |
21924 | { | |
518817b3 | 21925 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 21926 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 21927 | struct dwarf_block *blk; |
98bfdba5 PA |
21928 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21929 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21930 | ||
21931 | *value = 0; | |
21932 | *bytes = NULL; | |
21933 | *baton = NULL; | |
c906108c SS |
21934 | |
21935 | switch (attr->form) | |
21936 | { | |
21937 | case DW_FORM_addr: | |
336d760d | 21938 | case DW_FORM_addrx: |
3019eac3 | 21939 | case DW_FORM_GNU_addr_index: |
ac56253d | 21940 | { |
ac56253d TT |
21941 | gdb_byte *data; |
21942 | ||
98bfdba5 PA |
21943 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21944 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21945 | cu_header->addr_size, |
98bfdba5 | 21946 | TYPE_LENGTH (type)); |
ac56253d TT |
21947 | /* Symbols of this form are reasonably rare, so we just |
21948 | piggyback on the existing location code rather than writing | |
21949 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21950 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
21951 | (*baton)->per_cu = cu->per_cu; |
21952 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 21953 | |
98bfdba5 | 21954 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 21955 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 21956 | (*baton)->data = data; |
ac56253d TT |
21957 | |
21958 | data[0] = DW_OP_addr; | |
21959 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
21960 | byte_order, DW_ADDR (attr)); | |
21961 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 21962 | } |
c906108c | 21963 | break; |
4ac36638 | 21964 | case DW_FORM_string: |
93b5768b | 21965 | case DW_FORM_strp: |
cf532bd1 | 21966 | case DW_FORM_strx: |
3019eac3 | 21967 | case DW_FORM_GNU_str_index: |
36586728 | 21968 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
21969 | /* DW_STRING is already allocated on the objfile obstack, point |
21970 | directly to it. */ | |
d521ce57 | 21971 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 21972 | break; |
c906108c SS |
21973 | case DW_FORM_block1: |
21974 | case DW_FORM_block2: | |
21975 | case DW_FORM_block4: | |
21976 | case DW_FORM_block: | |
2dc7f7b3 | 21977 | case DW_FORM_exprloc: |
0224619f | 21978 | case DW_FORM_data16: |
c906108c | 21979 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
21980 | if (TYPE_LENGTH (type) != blk->size) |
21981 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
21982 | TYPE_LENGTH (type)); | |
21983 | *bytes = blk->data; | |
c906108c | 21984 | break; |
2df3850c JM |
21985 | |
21986 | /* The DW_AT_const_value attributes are supposed to carry the | |
21987 | symbol's value "represented as it would be on the target | |
21988 | architecture." By the time we get here, it's already been | |
21989 | converted to host endianness, so we just need to sign- or | |
21990 | zero-extend it as appropriate. */ | |
21991 | case DW_FORM_data1: | |
3aef2284 | 21992 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 21993 | break; |
c906108c | 21994 | case DW_FORM_data2: |
3aef2284 | 21995 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 21996 | break; |
c906108c | 21997 | case DW_FORM_data4: |
3aef2284 | 21998 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 21999 | break; |
c906108c | 22000 | case DW_FORM_data8: |
3aef2284 | 22001 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
22002 | break; |
22003 | ||
c906108c | 22004 | case DW_FORM_sdata: |
663c44ac | 22005 | case DW_FORM_implicit_const: |
98bfdba5 | 22006 | *value = DW_SND (attr); |
2df3850c JM |
22007 | break; |
22008 | ||
c906108c | 22009 | case DW_FORM_udata: |
98bfdba5 | 22010 | *value = DW_UNSND (attr); |
c906108c | 22011 | break; |
2df3850c | 22012 | |
c906108c | 22013 | default: |
b98664d3 | 22014 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 22015 | dwarf_form_name (attr->form)); |
98bfdba5 | 22016 | *value = 0; |
c906108c SS |
22017 | break; |
22018 | } | |
22019 | } | |
22020 | ||
2df3850c | 22021 | |
98bfdba5 PA |
22022 | /* Copy constant value from an attribute to a symbol. */ |
22023 | ||
2df3850c | 22024 | static void |
ff39bb5e | 22025 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 22026 | struct dwarf2_cu *cu) |
2df3850c | 22027 | { |
518817b3 | 22028 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 22029 | LONGEST value; |
d521ce57 | 22030 | const gdb_byte *bytes; |
98bfdba5 | 22031 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 22032 | |
98bfdba5 PA |
22033 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
22034 | SYMBOL_PRINT_NAME (sym), | |
22035 | &objfile->objfile_obstack, cu, | |
22036 | &value, &bytes, &baton); | |
2df3850c | 22037 | |
98bfdba5 PA |
22038 | if (baton != NULL) |
22039 | { | |
98bfdba5 | 22040 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 22041 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
22042 | } |
22043 | else if (bytes != NULL) | |
22044 | { | |
22045 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 22046 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
22047 | } |
22048 | else | |
22049 | { | |
22050 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 22051 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 22052 | } |
2df3850c JM |
22053 | } |
22054 | ||
c906108c SS |
22055 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
22056 | ||
22057 | static struct type * | |
e7c27a73 | 22058 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22059 | { |
c906108c | 22060 | struct attribute *type_attr; |
c906108c | 22061 | |
e142c38c | 22062 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
22063 | if (!type_attr) |
22064 | { | |
518817b3 | 22065 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22066 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 22067 | return objfile_type (objfile)->builtin_void; |
c906108c | 22068 | } |
348e048f | 22069 | |
673bfd45 | 22070 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22071 | } |
22072 | ||
b4ba55a1 JB |
22073 | /* True iff CU's producer generates GNAT Ada auxiliary information |
22074 | that allows to find parallel types through that information instead | |
22075 | of having to do expensive parallel lookups by type name. */ | |
22076 | ||
22077 | static int | |
22078 | need_gnat_info (struct dwarf2_cu *cu) | |
22079 | { | |
de4cb04a JB |
22080 | /* Assume that the Ada compiler was GNAT, which always produces |
22081 | the auxiliary information. */ | |
22082 | return (cu->language == language_ada); | |
b4ba55a1 JB |
22083 | } |
22084 | ||
b4ba55a1 JB |
22085 | /* Return the auxiliary type of the die in question using its |
22086 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
22087 | attribute is not present. */ | |
22088 | ||
22089 | static struct type * | |
22090 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
22091 | { | |
b4ba55a1 | 22092 | struct attribute *type_attr; |
b4ba55a1 JB |
22093 | |
22094 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
22095 | if (!type_attr) | |
22096 | return NULL; | |
22097 | ||
673bfd45 | 22098 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
22099 | } |
22100 | ||
22101 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
22102 | descriptive type accordingly. */ | |
22103 | ||
22104 | static void | |
22105 | set_descriptive_type (struct type *type, struct die_info *die, | |
22106 | struct dwarf2_cu *cu) | |
22107 | { | |
22108 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
22109 | ||
22110 | if (descriptive_type) | |
22111 | { | |
22112 | ALLOCATE_GNAT_AUX_TYPE (type); | |
22113 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
22114 | } | |
22115 | } | |
22116 | ||
c906108c SS |
22117 | /* Return the containing type of the die in question using its |
22118 | DW_AT_containing_type attribute. */ | |
22119 | ||
22120 | static struct type * | |
e7c27a73 | 22121 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22122 | { |
c906108c | 22123 | struct attribute *type_attr; |
518817b3 | 22124 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22125 | |
e142c38c | 22126 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
22127 | if (!type_attr) |
22128 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 22129 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 22130 | |
673bfd45 | 22131 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22132 | } |
22133 | ||
ac9ec31b DE |
22134 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
22135 | ||
22136 | static struct type * | |
22137 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
22138 | { | |
518817b3 SM |
22139 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22140 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 22141 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 22142 | char *saved; |
ac9ec31b | 22143 | |
528e1572 SM |
22144 | std::string message |
22145 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
22146 | objfile_name (objfile), | |
22147 | sect_offset_str (cu->header.sect_off), | |
22148 | sect_offset_str (die->sect_off)); | |
efba19b0 | 22149 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 22150 | |
19f392bc | 22151 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
22152 | } |
22153 | ||
673bfd45 | 22154 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
22155 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
22156 | DW_AT_containing_type. | |
673bfd45 DE |
22157 | If there is no type substitute an error marker. */ |
22158 | ||
c906108c | 22159 | static struct type * |
ff39bb5e | 22160 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 22161 | struct dwarf2_cu *cu) |
c906108c | 22162 | { |
518817b3 SM |
22163 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22164 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22165 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
22166 | struct type *this_type; |
22167 | ||
ac9ec31b DE |
22168 | gdb_assert (attr->name == DW_AT_type |
22169 | || attr->name == DW_AT_GNAT_descriptive_type | |
22170 | || attr->name == DW_AT_containing_type); | |
22171 | ||
673bfd45 DE |
22172 | /* First see if we have it cached. */ |
22173 | ||
36586728 TT |
22174 | if (attr->form == DW_FORM_GNU_ref_alt) |
22175 | { | |
22176 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 22177 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 22178 | |
ed2dc618 SM |
22179 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
22180 | dwarf2_per_objfile); | |
9c541725 | 22181 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 22182 | } |
7771576e | 22183 | else if (attr_form_is_ref (attr)) |
673bfd45 | 22184 | { |
9c541725 | 22185 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 22186 | |
9c541725 | 22187 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 22188 | } |
55f1336d | 22189 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 22190 | { |
ac9ec31b | 22191 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 22192 | |
ac9ec31b | 22193 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
22194 | } |
22195 | else | |
22196 | { | |
b98664d3 | 22197 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
22198 | " at %s [in module %s]"), |
22199 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 22200 | objfile_name (objfile)); |
ac9ec31b | 22201 | return build_error_marker_type (cu, die); |
673bfd45 DE |
22202 | } |
22203 | ||
22204 | /* If not cached we need to read it in. */ | |
22205 | ||
22206 | if (this_type == NULL) | |
22207 | { | |
ac9ec31b | 22208 | struct die_info *type_die = NULL; |
673bfd45 DE |
22209 | struct dwarf2_cu *type_cu = cu; |
22210 | ||
7771576e | 22211 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22212 | type_die = follow_die_ref (die, attr, &type_cu); |
22213 | if (type_die == NULL) | |
22214 | return build_error_marker_type (cu, die); | |
22215 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
22216 | from an inter-CU reference and the type's CU got expanded before |
22217 | ours. */ | |
ac9ec31b | 22218 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
22219 | } |
22220 | ||
22221 | /* If we still don't have a type use an error marker. */ | |
22222 | ||
22223 | if (this_type == NULL) | |
ac9ec31b | 22224 | return build_error_marker_type (cu, die); |
673bfd45 | 22225 | |
f792889a | 22226 | return this_type; |
c906108c SS |
22227 | } |
22228 | ||
673bfd45 DE |
22229 | /* Return the type in DIE, CU. |
22230 | Returns NULL for invalid types. | |
22231 | ||
02142a6c | 22232 | This first does a lookup in die_type_hash, |
673bfd45 DE |
22233 | and only reads the die in if necessary. |
22234 | ||
22235 | NOTE: This can be called when reading in partial or full symbols. */ | |
22236 | ||
f792889a | 22237 | static struct type * |
e7c27a73 | 22238 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22239 | { |
f792889a DJ |
22240 | struct type *this_type; |
22241 | ||
22242 | this_type = get_die_type (die, cu); | |
22243 | if (this_type) | |
22244 | return this_type; | |
22245 | ||
673bfd45 DE |
22246 | return read_type_die_1 (die, cu); |
22247 | } | |
22248 | ||
22249 | /* Read the type in DIE, CU. | |
22250 | Returns NULL for invalid types. */ | |
22251 | ||
22252 | static struct type * | |
22253 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
22254 | { | |
22255 | struct type *this_type = NULL; | |
22256 | ||
c906108c SS |
22257 | switch (die->tag) |
22258 | { | |
22259 | case DW_TAG_class_type: | |
680b30c7 | 22260 | case DW_TAG_interface_type: |
c906108c SS |
22261 | case DW_TAG_structure_type: |
22262 | case DW_TAG_union_type: | |
f792889a | 22263 | this_type = read_structure_type (die, cu); |
c906108c SS |
22264 | break; |
22265 | case DW_TAG_enumeration_type: | |
f792889a | 22266 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
22267 | break; |
22268 | case DW_TAG_subprogram: | |
22269 | case DW_TAG_subroutine_type: | |
edb3359d | 22270 | case DW_TAG_inlined_subroutine: |
f792889a | 22271 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
22272 | break; |
22273 | case DW_TAG_array_type: | |
f792889a | 22274 | this_type = read_array_type (die, cu); |
c906108c | 22275 | break; |
72019c9c | 22276 | case DW_TAG_set_type: |
f792889a | 22277 | this_type = read_set_type (die, cu); |
72019c9c | 22278 | break; |
c906108c | 22279 | case DW_TAG_pointer_type: |
f792889a | 22280 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
22281 | break; |
22282 | case DW_TAG_ptr_to_member_type: | |
f792889a | 22283 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
22284 | break; |
22285 | case DW_TAG_reference_type: | |
4297a3f0 AV |
22286 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
22287 | break; | |
22288 | case DW_TAG_rvalue_reference_type: | |
22289 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
22290 | break; |
22291 | case DW_TAG_const_type: | |
f792889a | 22292 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
22293 | break; |
22294 | case DW_TAG_volatile_type: | |
f792889a | 22295 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 22296 | break; |
06d66ee9 TT |
22297 | case DW_TAG_restrict_type: |
22298 | this_type = read_tag_restrict_type (die, cu); | |
22299 | break; | |
c906108c | 22300 | case DW_TAG_string_type: |
f792889a | 22301 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
22302 | break; |
22303 | case DW_TAG_typedef: | |
f792889a | 22304 | this_type = read_typedef (die, cu); |
c906108c | 22305 | break; |
a02abb62 | 22306 | case DW_TAG_subrange_type: |
f792889a | 22307 | this_type = read_subrange_type (die, cu); |
a02abb62 | 22308 | break; |
c906108c | 22309 | case DW_TAG_base_type: |
f792889a | 22310 | this_type = read_base_type (die, cu); |
c906108c | 22311 | break; |
81a17f79 | 22312 | case DW_TAG_unspecified_type: |
f792889a | 22313 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 22314 | break; |
0114d602 DJ |
22315 | case DW_TAG_namespace: |
22316 | this_type = read_namespace_type (die, cu); | |
22317 | break; | |
f55ee35c JK |
22318 | case DW_TAG_module: |
22319 | this_type = read_module_type (die, cu); | |
22320 | break; | |
a2c2acaf MW |
22321 | case DW_TAG_atomic_type: |
22322 | this_type = read_tag_atomic_type (die, cu); | |
22323 | break; | |
c906108c | 22324 | default: |
b98664d3 | 22325 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 22326 | dwarf_tag_name (die->tag)); |
c906108c SS |
22327 | break; |
22328 | } | |
63d06c5c | 22329 | |
f792889a | 22330 | return this_type; |
63d06c5c DC |
22331 | } |
22332 | ||
abc72ce4 DE |
22333 | /* See if we can figure out if the class lives in a namespace. We do |
22334 | this by looking for a member function; its demangled name will | |
22335 | contain namespace info, if there is any. | |
22336 | Return the computed name or NULL. | |
22337 | Space for the result is allocated on the objfile's obstack. | |
22338 | This is the full-die version of guess_partial_die_structure_name. | |
22339 | In this case we know DIE has no useful parent. */ | |
22340 | ||
22341 | static char * | |
22342 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
22343 | { | |
22344 | struct die_info *spec_die; | |
22345 | struct dwarf2_cu *spec_cu; | |
22346 | struct die_info *child; | |
518817b3 | 22347 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
22348 | |
22349 | spec_cu = cu; | |
22350 | spec_die = die_specification (die, &spec_cu); | |
22351 | if (spec_die != NULL) | |
22352 | { | |
22353 | die = spec_die; | |
22354 | cu = spec_cu; | |
22355 | } | |
22356 | ||
22357 | for (child = die->child; | |
22358 | child != NULL; | |
22359 | child = child->sibling) | |
22360 | { | |
22361 | if (child->tag == DW_TAG_subprogram) | |
22362 | { | |
73b9be8b | 22363 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22364 | |
7d45c7c3 | 22365 | if (linkage_name != NULL) |
abc72ce4 DE |
22366 | { |
22367 | char *actual_name | |
22368 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 22369 | linkage_name); |
abc72ce4 DE |
22370 | char *name = NULL; |
22371 | ||
22372 | if (actual_name != NULL) | |
22373 | { | |
15d034d0 | 22374 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22375 | |
22376 | if (die_name != NULL | |
22377 | && strcmp (die_name, actual_name) != 0) | |
22378 | { | |
22379 | /* Strip off the class name from the full name. | |
22380 | We want the prefix. */ | |
22381 | int die_name_len = strlen (die_name); | |
22382 | int actual_name_len = strlen (actual_name); | |
22383 | ||
22384 | /* Test for '::' as a sanity check. */ | |
22385 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
22386 | && actual_name[actual_name_len |
22387 | - die_name_len - 1] == ':') | |
0cf9feb9 | 22388 | name = obstack_strndup ( |
e3b94546 | 22389 | &objfile->per_bfd->storage_obstack, |
224c3ddb | 22390 | actual_name, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22391 | } |
22392 | } | |
22393 | xfree (actual_name); | |
22394 | return name; | |
22395 | } | |
22396 | } | |
22397 | } | |
22398 | ||
22399 | return NULL; | |
22400 | } | |
22401 | ||
96408a79 SA |
22402 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22403 | prefix part in such case. See | |
22404 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22405 | ||
a121b7c1 | 22406 | static const char * |
96408a79 SA |
22407 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22408 | { | |
22409 | struct attribute *attr; | |
e6a959d6 | 22410 | const char *base; |
96408a79 SA |
22411 | |
22412 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22413 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22414 | return NULL; | |
22415 | ||
7d45c7c3 | 22416 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22417 | return NULL; |
22418 | ||
73b9be8b | 22419 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
22420 | if (attr == NULL || DW_STRING (attr) == NULL) |
22421 | return NULL; | |
22422 | ||
22423 | /* dwarf2_name had to be already called. */ | |
22424 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
22425 | ||
22426 | /* Strip the base name, keep any leading namespaces/classes. */ | |
22427 | base = strrchr (DW_STRING (attr), ':'); | |
22428 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
22429 | return ""; | |
22430 | ||
518817b3 | 22431 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
22432 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
22433 | DW_STRING (attr), | |
22434 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
22435 | } |
22436 | ||
fdde2d81 | 22437 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22438 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22439 | |
0114d602 DJ |
22440 | For example, if we're within the method foo() in the following |
22441 | code: | |
22442 | ||
22443 | namespace N { | |
22444 | class C { | |
22445 | void foo () { | |
22446 | } | |
22447 | }; | |
22448 | } | |
22449 | ||
22450 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22451 | |
0d5cff50 | 22452 | static const char * |
e142c38c | 22453 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22454 | { |
518817b3 SM |
22455 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22456 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
22457 | struct die_info *parent, *spec_die; |
22458 | struct dwarf2_cu *spec_cu; | |
22459 | struct type *parent_type; | |
a121b7c1 | 22460 | const char *retval; |
63d06c5c | 22461 | |
9c37b5ae | 22462 | if (cu->language != language_cplus |
c44af4eb TT |
22463 | && cu->language != language_fortran && cu->language != language_d |
22464 | && cu->language != language_rust) | |
0114d602 DJ |
22465 | return ""; |
22466 | ||
96408a79 SA |
22467 | retval = anonymous_struct_prefix (die, cu); |
22468 | if (retval) | |
22469 | return retval; | |
22470 | ||
0114d602 DJ |
22471 | /* We have to be careful in the presence of DW_AT_specification. |
22472 | For example, with GCC 3.4, given the code | |
22473 | ||
22474 | namespace N { | |
22475 | void foo() { | |
22476 | // Definition of N::foo. | |
22477 | } | |
22478 | } | |
22479 | ||
22480 | then we'll have a tree of DIEs like this: | |
22481 | ||
22482 | 1: DW_TAG_compile_unit | |
22483 | 2: DW_TAG_namespace // N | |
22484 | 3: DW_TAG_subprogram // declaration of N::foo | |
22485 | 4: DW_TAG_subprogram // definition of N::foo | |
22486 | DW_AT_specification // refers to die #3 | |
22487 | ||
22488 | Thus, when processing die #4, we have to pretend that we're in | |
22489 | the context of its DW_AT_specification, namely the contex of die | |
22490 | #3. */ | |
22491 | spec_cu = cu; | |
22492 | spec_die = die_specification (die, &spec_cu); | |
22493 | if (spec_die == NULL) | |
22494 | parent = die->parent; | |
22495 | else | |
63d06c5c | 22496 | { |
0114d602 DJ |
22497 | parent = spec_die->parent; |
22498 | cu = spec_cu; | |
63d06c5c | 22499 | } |
0114d602 DJ |
22500 | |
22501 | if (parent == NULL) | |
22502 | return ""; | |
98bfdba5 PA |
22503 | else if (parent->building_fullname) |
22504 | { | |
22505 | const char *name; | |
22506 | const char *parent_name; | |
22507 | ||
22508 | /* It has been seen on RealView 2.2 built binaries, | |
22509 | DW_TAG_template_type_param types actually _defined_ as | |
22510 | children of the parent class: | |
22511 | ||
22512 | enum E {}; | |
22513 | template class <class Enum> Class{}; | |
22514 | Class<enum E> class_e; | |
22515 | ||
22516 | 1: DW_TAG_class_type (Class) | |
22517 | 2: DW_TAG_enumeration_type (E) | |
22518 | 3: DW_TAG_enumerator (enum1:0) | |
22519 | 3: DW_TAG_enumerator (enum2:1) | |
22520 | ... | |
22521 | 2: DW_TAG_template_type_param | |
22522 | DW_AT_type DW_FORM_ref_udata (E) | |
22523 | ||
22524 | Besides being broken debug info, it can put GDB into an | |
22525 | infinite loop. Consider: | |
22526 | ||
22527 | When we're building the full name for Class<E>, we'll start | |
22528 | at Class, and go look over its template type parameters, | |
22529 | finding E. We'll then try to build the full name of E, and | |
22530 | reach here. We're now trying to build the full name of E, | |
22531 | and look over the parent DIE for containing scope. In the | |
22532 | broken case, if we followed the parent DIE of E, we'd again | |
22533 | find Class, and once again go look at its template type | |
22534 | arguments, etc., etc. Simply don't consider such parent die | |
22535 | as source-level parent of this die (it can't be, the language | |
22536 | doesn't allow it), and break the loop here. */ | |
22537 | name = dwarf2_name (die, cu); | |
22538 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22539 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22540 | name ? name : "<unknown>", |
22541 | parent_name ? parent_name : "<unknown>"); | |
22542 | return ""; | |
22543 | } | |
63d06c5c | 22544 | else |
0114d602 DJ |
22545 | switch (parent->tag) |
22546 | { | |
63d06c5c | 22547 | case DW_TAG_namespace: |
0114d602 | 22548 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22549 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22550 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22551 | Work around this problem here. */ | |
22552 | if (cu->language == language_cplus | |
e86ca25f | 22553 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 22554 | return ""; |
0114d602 | 22555 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 22556 | return TYPE_NAME (parent_type); |
63d06c5c | 22557 | case DW_TAG_class_type: |
680b30c7 | 22558 | case DW_TAG_interface_type: |
63d06c5c | 22559 | case DW_TAG_structure_type: |
0114d602 | 22560 | case DW_TAG_union_type: |
f55ee35c | 22561 | case DW_TAG_module: |
0114d602 | 22562 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
22563 | if (TYPE_NAME (parent_type) != NULL) |
22564 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
22565 | else |
22566 | /* An anonymous structure is only allowed non-static data | |
22567 | members; no typedefs, no member functions, et cetera. | |
22568 | So it does not need a prefix. */ | |
22569 | return ""; | |
abc72ce4 | 22570 | case DW_TAG_compile_unit: |
95554aad | 22571 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22572 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22573 | if (cu->language == language_cplus | |
fd5866f6 | 22574 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
22575 | && die->child != NULL |
22576 | && (die->tag == DW_TAG_class_type | |
22577 | || die->tag == DW_TAG_structure_type | |
22578 | || die->tag == DW_TAG_union_type)) | |
22579 | { | |
22580 | char *name = guess_full_die_structure_name (die, cu); | |
22581 | if (name != NULL) | |
22582 | return name; | |
22583 | } | |
22584 | return ""; | |
3d567982 TT |
22585 | case DW_TAG_enumeration_type: |
22586 | parent_type = read_type_die (parent, cu); | |
22587 | if (TYPE_DECLARED_CLASS (parent_type)) | |
22588 | { | |
e86ca25f TT |
22589 | if (TYPE_NAME (parent_type) != NULL) |
22590 | return TYPE_NAME (parent_type); | |
3d567982 TT |
22591 | return ""; |
22592 | } | |
22593 | /* Fall through. */ | |
63d06c5c | 22594 | default: |
8176b9b8 | 22595 | return determine_prefix (parent, cu); |
63d06c5c | 22596 | } |
63d06c5c DC |
22597 | } |
22598 | ||
3e43a32a MS |
22599 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22600 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22601 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22602 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22603 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22604 | |
f55ee35c | 22605 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22606 | |
22607 | static char * | |
f55ee35c JK |
22608 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
22609 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 22610 | { |
f55ee35c | 22611 | const char *lead = ""; |
5c315b68 | 22612 | const char *sep; |
63d06c5c | 22613 | |
3e43a32a MS |
22614 | if (suffix == NULL || suffix[0] == '\0' |
22615 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22616 | sep = ""; |
45280282 IB |
22617 | else if (cu->language == language_d) |
22618 | { | |
22619 | /* For D, the 'main' function could be defined in any module, but it | |
22620 | should never be prefixed. */ | |
22621 | if (strcmp (suffix, "D main") == 0) | |
22622 | { | |
22623 | prefix = ""; | |
22624 | sep = ""; | |
22625 | } | |
22626 | else | |
22627 | sep = "."; | |
22628 | } | |
f55ee35c JK |
22629 | else if (cu->language == language_fortran && physname) |
22630 | { | |
22631 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22632 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22633 | ||
22634 | lead = "__"; | |
22635 | sep = "_MOD_"; | |
22636 | } | |
987504bb JJ |
22637 | else |
22638 | sep = "::"; | |
63d06c5c | 22639 | |
6dd47d34 DE |
22640 | if (prefix == NULL) |
22641 | prefix = ""; | |
22642 | if (suffix == NULL) | |
22643 | suffix = ""; | |
22644 | ||
987504bb JJ |
22645 | if (obs == NULL) |
22646 | { | |
3e43a32a | 22647 | char *retval |
224c3ddb SM |
22648 | = ((char *) |
22649 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22650 | |
f55ee35c JK |
22651 | strcpy (retval, lead); |
22652 | strcat (retval, prefix); | |
6dd47d34 DE |
22653 | strcat (retval, sep); |
22654 | strcat (retval, suffix); | |
63d06c5c DC |
22655 | return retval; |
22656 | } | |
987504bb JJ |
22657 | else |
22658 | { | |
22659 | /* We have an obstack. */ | |
f55ee35c | 22660 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22661 | } |
63d06c5c DC |
22662 | } |
22663 | ||
c906108c SS |
22664 | /* Return sibling of die, NULL if no sibling. */ |
22665 | ||
f9aca02d | 22666 | static struct die_info * |
fba45db2 | 22667 | sibling_die (struct die_info *die) |
c906108c | 22668 | { |
639d11d3 | 22669 | return die->sibling; |
c906108c SS |
22670 | } |
22671 | ||
71c25dea TT |
22672 | /* Get name of a die, return NULL if not found. */ |
22673 | ||
15d034d0 TT |
22674 | static const char * |
22675 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
22676 | struct obstack *obstack) |
22677 | { | |
22678 | if (name && cu->language == language_cplus) | |
22679 | { | |
2f408ecb | 22680 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 22681 | |
2f408ecb | 22682 | if (!canon_name.empty ()) |
71c25dea | 22683 | { |
2f408ecb | 22684 | if (canon_name != name) |
efba19b0 | 22685 | name = obstack_strdup (obstack, canon_name); |
71c25dea TT |
22686 | } |
22687 | } | |
22688 | ||
22689 | return name; | |
c906108c SS |
22690 | } |
22691 | ||
96553a0c DE |
22692 | /* Get name of a die, return NULL if not found. |
22693 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22694 | |
15d034d0 | 22695 | static const char * |
e142c38c | 22696 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22697 | { |
22698 | struct attribute *attr; | |
518817b3 | 22699 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 22700 | |
e142c38c | 22701 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 22702 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 22703 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22704 | && die->tag != DW_TAG_class_type |
22705 | && die->tag != DW_TAG_interface_type | |
22706 | && die->tag != DW_TAG_structure_type | |
22707 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22708 | return NULL; |
22709 | ||
22710 | switch (die->tag) | |
22711 | { | |
22712 | case DW_TAG_compile_unit: | |
95554aad | 22713 | case DW_TAG_partial_unit: |
71c25dea TT |
22714 | /* Compilation units have a DW_AT_name that is a filename, not |
22715 | a source language identifier. */ | |
22716 | case DW_TAG_enumeration_type: | |
22717 | case DW_TAG_enumerator: | |
22718 | /* These tags always have simple identifiers already; no need | |
22719 | to canonicalize them. */ | |
22720 | return DW_STRING (attr); | |
907af001 | 22721 | |
96553a0c DE |
22722 | case DW_TAG_namespace: |
22723 | if (attr != NULL && DW_STRING (attr) != NULL) | |
22724 | return DW_STRING (attr); | |
22725 | return CP_ANONYMOUS_NAMESPACE_STR; | |
22726 | ||
907af001 UW |
22727 | case DW_TAG_class_type: |
22728 | case DW_TAG_interface_type: | |
22729 | case DW_TAG_structure_type: | |
22730 | case DW_TAG_union_type: | |
22731 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22732 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22733 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22734 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 22735 | if (attr && DW_STRING (attr) |
61012eef GB |
22736 | && (startswith (DW_STRING (attr), "._") |
22737 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 22738 | return NULL; |
53832f31 TT |
22739 | |
22740 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22741 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22742 | if (!attr || DW_STRING (attr) == NULL) | |
22743 | { | |
df5c6c50 | 22744 | char *demangled = NULL; |
53832f31 | 22745 | |
73b9be8b | 22746 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
22747 | if (attr == NULL || DW_STRING (attr) == NULL) |
22748 | return NULL; | |
22749 | ||
df5c6c50 JK |
22750 | /* Avoid demangling DW_STRING (attr) the second time on a second |
22751 | call for the same DIE. */ | |
22752 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 22753 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
22754 | |
22755 | if (demangled) | |
22756 | { | |
e6a959d6 | 22757 | const char *base; |
96408a79 | 22758 | |
53832f31 | 22759 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 22760 | DW_STRING (attr) |
021887d8 TT |
22761 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
22762 | demangled); | |
53832f31 TT |
22763 | DW_STRING_IS_CANONICAL (attr) = 1; |
22764 | xfree (demangled); | |
96408a79 SA |
22765 | |
22766 | /* Strip any leading namespaces/classes, keep only the base name. | |
22767 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
22768 | base = strrchr (DW_STRING (attr), ':'); | |
22769 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
22770 | return &base[1]; | |
22771 | else | |
22772 | return DW_STRING (attr); | |
53832f31 TT |
22773 | } |
22774 | } | |
907af001 UW |
22775 | break; |
22776 | ||
71c25dea | 22777 | default: |
907af001 UW |
22778 | break; |
22779 | } | |
22780 | ||
22781 | if (!DW_STRING_IS_CANONICAL (attr)) | |
22782 | { | |
22783 | DW_STRING (attr) | |
22784 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
e3b94546 | 22785 | &objfile->per_bfd->storage_obstack); |
907af001 | 22786 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 22787 | } |
907af001 | 22788 | return DW_STRING (attr); |
9219021c DC |
22789 | } |
22790 | ||
22791 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22792 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22793 | containing the return value on output. */ | |
9219021c DC |
22794 | |
22795 | static struct die_info * | |
f2f0e013 | 22796 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22797 | { |
22798 | struct attribute *attr; | |
9219021c | 22799 | |
f2f0e013 | 22800 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22801 | if (attr == NULL) |
22802 | return NULL; | |
22803 | ||
f2f0e013 | 22804 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22805 | } |
22806 | ||
fa9c3fa0 TT |
22807 | /* A convenience function that returns an "unknown" DWARF name, |
22808 | including the value of V. STR is the name of the entity being | |
22809 | printed, e.g., "TAG". */ | |
22810 | ||
22811 | static const char * | |
22812 | dwarf_unknown (const char *str, unsigned v) | |
22813 | { | |
22814 | char *cell = get_print_cell (); | |
22815 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
22816 | return cell; | |
22817 | } | |
22818 | ||
c906108c SS |
22819 | /* Convert a DIE tag into its string name. */ |
22820 | ||
f39c6ffd | 22821 | static const char * |
aa1ee363 | 22822 | dwarf_tag_name (unsigned tag) |
c906108c | 22823 | { |
f39c6ffd TT |
22824 | const char *name = get_DW_TAG_name (tag); |
22825 | ||
22826 | if (name == NULL) | |
fa9c3fa0 | 22827 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
22828 | |
22829 | return name; | |
c906108c SS |
22830 | } |
22831 | ||
22832 | /* Convert a DWARF attribute code into its string name. */ | |
22833 | ||
f39c6ffd | 22834 | static const char * |
aa1ee363 | 22835 | dwarf_attr_name (unsigned attr) |
c906108c | 22836 | { |
f39c6ffd TT |
22837 | const char *name; |
22838 | ||
c764a876 | 22839 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
22840 | if (attr == DW_AT_MIPS_fde) |
22841 | return "DW_AT_MIPS_fde"; | |
22842 | #else | |
22843 | if (attr == DW_AT_HP_block_index) | |
22844 | return "DW_AT_HP_block_index"; | |
c764a876 | 22845 | #endif |
f39c6ffd TT |
22846 | |
22847 | name = get_DW_AT_name (attr); | |
22848 | ||
22849 | if (name == NULL) | |
fa9c3fa0 | 22850 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
22851 | |
22852 | return name; | |
c906108c SS |
22853 | } |
22854 | ||
a084a2a6 AT |
22855 | /* Convert a unit type to corresponding DW_UT name. */ |
22856 | ||
22857 | static const char * | |
22858 | dwarf_unit_type_name (int unit_type) { | |
22859 | switch (unit_type) | |
22860 | { | |
22861 | case 0x01: | |
22862 | return "DW_UT_compile (0x01)"; | |
22863 | case 0x02: | |
22864 | return "DW_UT_type (0x02)"; | |
22865 | case 0x03: | |
22866 | return "DW_UT_partial (0x03)"; | |
22867 | case 0x04: | |
22868 | return "DW_UT_skeleton (0x04)"; | |
22869 | case 0x05: | |
22870 | return "DW_UT_split_compile (0x05)"; | |
22871 | case 0x06: | |
22872 | return "DW_UT_split_type (0x06)"; | |
22873 | case 0x80: | |
22874 | return "DW_UT_lo_user (0x80)"; | |
22875 | case 0xff: | |
22876 | return "DW_UT_hi_user (0xff)"; | |
22877 | default: | |
22878 | return nullptr; | |
22879 | } | |
22880 | } | |
22881 | ||
c906108c SS |
22882 | /* Convert a DWARF value form code into its string name. */ |
22883 | ||
f39c6ffd | 22884 | static const char * |
aa1ee363 | 22885 | dwarf_form_name (unsigned form) |
c906108c | 22886 | { |
f39c6ffd TT |
22887 | const char *name = get_DW_FORM_name (form); |
22888 | ||
22889 | if (name == NULL) | |
fa9c3fa0 | 22890 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
22891 | |
22892 | return name; | |
c906108c SS |
22893 | } |
22894 | ||
a121b7c1 | 22895 | static const char * |
fba45db2 | 22896 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
22897 | { |
22898 | if (mybool) | |
22899 | return "TRUE"; | |
22900 | else | |
22901 | return "FALSE"; | |
22902 | } | |
22903 | ||
22904 | /* Convert a DWARF type code into its string name. */ | |
22905 | ||
f39c6ffd | 22906 | static const char * |
aa1ee363 | 22907 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 22908 | { |
f39c6ffd | 22909 | const char *name = get_DW_ATE_name (enc); |
c906108c | 22910 | |
f39c6ffd | 22911 | if (name == NULL) |
fa9c3fa0 | 22912 | return dwarf_unknown ("ATE", enc); |
c906108c | 22913 | |
f39c6ffd | 22914 | return name; |
c906108c | 22915 | } |
c906108c | 22916 | |
f9aca02d | 22917 | static void |
d97bc12b | 22918 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
22919 | { |
22920 | unsigned int i; | |
22921 | ||
d97bc12b | 22922 | print_spaces (indent, f); |
9d8780f0 | 22923 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 22924 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 22925 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
22926 | |
22927 | if (die->parent != NULL) | |
22928 | { | |
22929 | print_spaces (indent, f); | |
9d8780f0 SM |
22930 | fprintf_unfiltered (f, " parent at offset: %s\n", |
22931 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
22932 | } |
22933 | ||
22934 | print_spaces (indent, f); | |
22935 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 22936 | dwarf_bool_name (die->child != NULL)); |
c906108c | 22937 | |
d97bc12b DE |
22938 | print_spaces (indent, f); |
22939 | fprintf_unfiltered (f, " attributes:\n"); | |
22940 | ||
c906108c SS |
22941 | for (i = 0; i < die->num_attrs; ++i) |
22942 | { | |
d97bc12b DE |
22943 | print_spaces (indent, f); |
22944 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
22945 | dwarf_attr_name (die->attrs[i].name), |
22946 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 22947 | |
c906108c SS |
22948 | switch (die->attrs[i].form) |
22949 | { | |
c906108c | 22950 | case DW_FORM_addr: |
336d760d | 22951 | case DW_FORM_addrx: |
3019eac3 | 22952 | case DW_FORM_GNU_addr_index: |
d97bc12b | 22953 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 22954 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
22955 | break; |
22956 | case DW_FORM_block2: | |
22957 | case DW_FORM_block4: | |
22958 | case DW_FORM_block: | |
22959 | case DW_FORM_block1: | |
56eb65bd SP |
22960 | fprintf_unfiltered (f, "block: size %s", |
22961 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 22962 | break; |
2dc7f7b3 | 22963 | case DW_FORM_exprloc: |
56eb65bd SP |
22964 | fprintf_unfiltered (f, "expression: size %s", |
22965 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 22966 | break; |
0224619f JK |
22967 | case DW_FORM_data16: |
22968 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
22969 | break; | |
4568ecf9 DE |
22970 | case DW_FORM_ref_addr: |
22971 | fprintf_unfiltered (f, "ref address: "); | |
22972 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22973 | break; | |
36586728 TT |
22974 | case DW_FORM_GNU_ref_alt: |
22975 | fprintf_unfiltered (f, "alt ref address: "); | |
22976 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
22977 | break; | |
10b3939b DJ |
22978 | case DW_FORM_ref1: |
22979 | case DW_FORM_ref2: | |
22980 | case DW_FORM_ref4: | |
4568ecf9 DE |
22981 | case DW_FORM_ref8: |
22982 | case DW_FORM_ref_udata: | |
d97bc12b | 22983 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 22984 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 22985 | break; |
c906108c SS |
22986 | case DW_FORM_data1: |
22987 | case DW_FORM_data2: | |
22988 | case DW_FORM_data4: | |
ce5d95e1 | 22989 | case DW_FORM_data8: |
c906108c SS |
22990 | case DW_FORM_udata: |
22991 | case DW_FORM_sdata: | |
43bbcdc2 PH |
22992 | fprintf_unfiltered (f, "constant: %s", |
22993 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 22994 | break; |
2dc7f7b3 TT |
22995 | case DW_FORM_sec_offset: |
22996 | fprintf_unfiltered (f, "section offset: %s", | |
22997 | pulongest (DW_UNSND (&die->attrs[i]))); | |
22998 | break; | |
55f1336d | 22999 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
23000 | fprintf_unfiltered (f, "signature: %s", |
23001 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 23002 | break; |
c906108c | 23003 | case DW_FORM_string: |
4bdf3d34 | 23004 | case DW_FORM_strp: |
43988095 | 23005 | case DW_FORM_line_strp: |
cf532bd1 | 23006 | case DW_FORM_strx: |
3019eac3 | 23007 | case DW_FORM_GNU_str_index: |
36586728 | 23008 | case DW_FORM_GNU_strp_alt: |
8285870a | 23009 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 23010 | DW_STRING (&die->attrs[i]) |
8285870a JK |
23011 | ? DW_STRING (&die->attrs[i]) : "", |
23012 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
23013 | break; |
23014 | case DW_FORM_flag: | |
23015 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 23016 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 23017 | else |
d97bc12b | 23018 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 23019 | break; |
2dc7f7b3 TT |
23020 | case DW_FORM_flag_present: |
23021 | fprintf_unfiltered (f, "flag: TRUE"); | |
23022 | break; | |
a8329558 | 23023 | case DW_FORM_indirect: |
0963b4bd MS |
23024 | /* The reader will have reduced the indirect form to |
23025 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
23026 | fprintf_unfiltered (f, |
23027 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 23028 | break; |
663c44ac JK |
23029 | case DW_FORM_implicit_const: |
23030 | fprintf_unfiltered (f, "constant: %s", | |
23031 | plongest (DW_SND (&die->attrs[i]))); | |
23032 | break; | |
c906108c | 23033 | default: |
d97bc12b | 23034 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 23035 | die->attrs[i].form); |
d97bc12b | 23036 | break; |
c906108c | 23037 | } |
d97bc12b | 23038 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
23039 | } |
23040 | } | |
23041 | ||
f9aca02d | 23042 | static void |
d97bc12b | 23043 | dump_die_for_error (struct die_info *die) |
c906108c | 23044 | { |
d97bc12b DE |
23045 | dump_die_shallow (gdb_stderr, 0, die); |
23046 | } | |
23047 | ||
23048 | static void | |
23049 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
23050 | { | |
23051 | int indent = level * 4; | |
23052 | ||
23053 | gdb_assert (die != NULL); | |
23054 | ||
23055 | if (level >= max_level) | |
23056 | return; | |
23057 | ||
23058 | dump_die_shallow (f, indent, die); | |
23059 | ||
23060 | if (die->child != NULL) | |
c906108c | 23061 | { |
d97bc12b DE |
23062 | print_spaces (indent, f); |
23063 | fprintf_unfiltered (f, " Children:"); | |
23064 | if (level + 1 < max_level) | |
23065 | { | |
23066 | fprintf_unfiltered (f, "\n"); | |
23067 | dump_die_1 (f, level + 1, max_level, die->child); | |
23068 | } | |
23069 | else | |
23070 | { | |
3e43a32a MS |
23071 | fprintf_unfiltered (f, |
23072 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
23073 | } |
23074 | } | |
23075 | ||
23076 | if (die->sibling != NULL && level > 0) | |
23077 | { | |
23078 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
23079 | } |
23080 | } | |
23081 | ||
d97bc12b DE |
23082 | /* This is called from the pdie macro in gdbinit.in. |
23083 | It's not static so gcc will keep a copy callable from gdb. */ | |
23084 | ||
23085 | void | |
23086 | dump_die (struct die_info *die, int max_level) | |
23087 | { | |
23088 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
23089 | } | |
23090 | ||
f9aca02d | 23091 | static void |
51545339 | 23092 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 23093 | { |
51545339 | 23094 | void **slot; |
c906108c | 23095 | |
9c541725 PA |
23096 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
23097 | to_underlying (die->sect_off), | |
b64f50a1 | 23098 | INSERT); |
51545339 DJ |
23099 | |
23100 | *slot = die; | |
c906108c SS |
23101 | } |
23102 | ||
b64f50a1 JK |
23103 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
23104 | required kind. */ | |
23105 | ||
23106 | static sect_offset | |
ff39bb5e | 23107 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 23108 | { |
7771576e | 23109 | if (attr_form_is_ref (attr)) |
9c541725 | 23110 | return (sect_offset) DW_UNSND (attr); |
93311388 | 23111 | |
b98664d3 | 23112 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 23113 | dwarf_form_name (attr->form)); |
9c541725 | 23114 | return {}; |
c906108c SS |
23115 | } |
23116 | ||
43bbcdc2 PH |
23117 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
23118 | * the value held by the attribute is not constant. */ | |
a02abb62 | 23119 | |
43bbcdc2 | 23120 | static LONGEST |
ff39bb5e | 23121 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 23122 | { |
663c44ac | 23123 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
23124 | return DW_SND (attr); |
23125 | else if (attr->form == DW_FORM_udata | |
23126 | || attr->form == DW_FORM_data1 | |
23127 | || attr->form == DW_FORM_data2 | |
23128 | || attr->form == DW_FORM_data4 | |
23129 | || attr->form == DW_FORM_data8) | |
23130 | return DW_UNSND (attr); | |
23131 | else | |
23132 | { | |
0224619f | 23133 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
b98664d3 | 23134 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
23135 | dwarf_form_name (attr->form)); |
23136 | return default_value; | |
23137 | } | |
23138 | } | |
23139 | ||
348e048f DE |
23140 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
23141 | On entry *REF_CU is the CU of SRC_DIE. | |
23142 | On exit *REF_CU is the CU of the result. */ | |
23143 | ||
23144 | static struct die_info * | |
ff39bb5e | 23145 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
23146 | struct dwarf2_cu **ref_cu) |
23147 | { | |
23148 | struct die_info *die; | |
23149 | ||
7771576e | 23150 | if (attr_form_is_ref (attr)) |
348e048f | 23151 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 23152 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
23153 | die = follow_die_sig (src_die, attr, ref_cu); |
23154 | else | |
23155 | { | |
23156 | dump_die_for_error (src_die); | |
23157 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 23158 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
23159 | } |
23160 | ||
23161 | return die; | |
03dd20cc DJ |
23162 | } |
23163 | ||
5c631832 | 23164 | /* Follow reference OFFSET. |
673bfd45 DE |
23165 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
23166 | On exit *REF_CU is the CU of the result. | |
23167 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 23168 | |
f9aca02d | 23169 | static struct die_info * |
9c541725 | 23170 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 23171 | struct dwarf2_cu **ref_cu) |
c906108c | 23172 | { |
10b3939b | 23173 | struct die_info temp_die; |
f2f0e013 | 23174 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
23175 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23176 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 23177 | |
348e048f DE |
23178 | gdb_assert (cu->per_cu != NULL); |
23179 | ||
98bfdba5 PA |
23180 | target_cu = cu; |
23181 | ||
3019eac3 | 23182 | if (cu->per_cu->is_debug_types) |
348e048f DE |
23183 | { |
23184 | /* .debug_types CUs cannot reference anything outside their CU. | |
23185 | If they need to, they have to reference a signatured type via | |
55f1336d | 23186 | DW_FORM_ref_sig8. */ |
9c541725 | 23187 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 23188 | return NULL; |
348e048f | 23189 | } |
36586728 | 23190 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 23191 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
23192 | { |
23193 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 23194 | |
9c541725 | 23195 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 23196 | dwarf2_per_objfile); |
03dd20cc DJ |
23197 | |
23198 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 23199 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 23200 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 23201 | |
10b3939b DJ |
23202 | target_cu = per_cu->cu; |
23203 | } | |
98bfdba5 PA |
23204 | else if (cu->dies == NULL) |
23205 | { | |
23206 | /* We're loading full DIEs during partial symbol reading. */ | |
23207 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 23208 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 23209 | } |
c906108c | 23210 | |
f2f0e013 | 23211 | *ref_cu = target_cu; |
9c541725 | 23212 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
23213 | |
23214 | if (target_cu != cu) | |
23215 | target_cu->ancestor = cu; | |
23216 | ||
9a3c8263 | 23217 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
23218 | &temp_die, |
23219 | to_underlying (sect_off)); | |
5c631832 | 23220 | } |
10b3939b | 23221 | |
5c631832 JK |
23222 | /* Follow reference attribute ATTR of SRC_DIE. |
23223 | On entry *REF_CU is the CU of SRC_DIE. | |
23224 | On exit *REF_CU is the CU of the result. */ | |
23225 | ||
23226 | static struct die_info * | |
ff39bb5e | 23227 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
23228 | struct dwarf2_cu **ref_cu) |
23229 | { | |
9c541725 | 23230 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
23231 | struct dwarf2_cu *cu = *ref_cu; |
23232 | struct die_info *die; | |
23233 | ||
9c541725 | 23234 | die = follow_die_offset (sect_off, |
36586728 TT |
23235 | (attr->form == DW_FORM_GNU_ref_alt |
23236 | || cu->per_cu->is_dwz), | |
23237 | ref_cu); | |
5c631832 | 23238 | if (!die) |
9d8780f0 SM |
23239 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
23240 | "at %s [in module %s]"), | |
23241 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 23242 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 23243 | |
5c631832 JK |
23244 | return die; |
23245 | } | |
23246 | ||
9c541725 | 23247 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b | 23248 | Returned value is intended for DW_OP_call*. Returned |
e3b94546 SM |
23249 | dwarf2_locexpr_baton->data has lifetime of |
23250 | PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */ | |
5c631832 JK |
23251 | |
23252 | struct dwarf2_locexpr_baton | |
9c541725 | 23253 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
23254 | struct dwarf2_per_cu_data *per_cu, |
23255 | CORE_ADDR (*get_frame_pc) (void *baton), | |
e4a62c65 | 23256 | void *baton, bool resolve_abstract_p) |
5c631832 | 23257 | { |
918dd910 | 23258 | struct dwarf2_cu *cu; |
5c631832 JK |
23259 | struct die_info *die; |
23260 | struct attribute *attr; | |
23261 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
23262 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
23263 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 23264 | |
918dd910 | 23265 | if (per_cu->cu == NULL) |
58f0c718 | 23266 | load_cu (per_cu, false); |
918dd910 | 23267 | cu = per_cu->cu; |
cc12ce38 DE |
23268 | if (cu == NULL) |
23269 | { | |
23270 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23271 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23272 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23273 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23274 | } |
918dd910 | 23275 | |
9c541725 | 23276 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 23277 | if (!die) |
9d8780f0 SM |
23278 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23279 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
23280 | |
23281 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 23282 | if (!attr && resolve_abstract_p |
3360b6e7 | 23283 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
23284 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
23285 | { | |
23286 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
eba4caf2 TV |
23287 | CORE_ADDR baseaddr |
23288 | = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23289 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
e4a62c65 | 23290 | |
3360b6e7 TV |
23291 | for (const auto &cand_off |
23292 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 23293 | { |
3360b6e7 TV |
23294 | struct dwarf2_cu *cand_cu = cu; |
23295 | struct die_info *cand | |
23296 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
23297 | if (!cand | |
23298 | || !cand->parent | |
e4a62c65 TV |
23299 | || cand->parent->tag != DW_TAG_subprogram) |
23300 | continue; | |
23301 | ||
23302 | CORE_ADDR pc_low, pc_high; | |
23303 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
23304 | if (pc_low == ((CORE_ADDR) -1)) |
23305 | continue; | |
23306 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
23307 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
23308 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
23309 | continue; |
23310 | ||
23311 | die = cand; | |
23312 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
23313 | break; | |
23314 | } | |
23315 | } | |
23316 | ||
5c631832 JK |
23317 | if (!attr) |
23318 | { | |
e103e986 JK |
23319 | /* DWARF: "If there is no such attribute, then there is no effect.". |
23320 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 23321 | |
e103e986 | 23322 | retval.data = NULL; |
5c631832 JK |
23323 | retval.size = 0; |
23324 | } | |
8cf6f0b1 TT |
23325 | else if (attr_form_is_section_offset (attr)) |
23326 | { | |
23327 | struct dwarf2_loclist_baton loclist_baton; | |
23328 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
23329 | size_t size; | |
23330 | ||
23331 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
23332 | ||
23333 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
23334 | &size, pc); | |
23335 | retval.size = size; | |
23336 | } | |
5c631832 JK |
23337 | else |
23338 | { | |
23339 | if (!attr_form_is_block (attr)) | |
9d8780f0 | 23340 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 23341 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 23342 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
23343 | |
23344 | retval.data = DW_BLOCK (attr)->data; | |
23345 | retval.size = DW_BLOCK (attr)->size; | |
23346 | } | |
23347 | retval.per_cu = cu->per_cu; | |
918dd910 | 23348 | |
ed2dc618 | 23349 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 23350 | |
5c631832 | 23351 | return retval; |
348e048f DE |
23352 | } |
23353 | ||
8b9737bf TT |
23354 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
23355 | offset. */ | |
23356 | ||
23357 | struct dwarf2_locexpr_baton | |
23358 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
23359 | struct dwarf2_per_cu_data *per_cu, | |
23360 | CORE_ADDR (*get_frame_pc) (void *baton), | |
23361 | void *baton) | |
23362 | { | |
9c541725 | 23363 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 23364 | |
9c541725 | 23365 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
23366 | } |
23367 | ||
b6807d98 TT |
23368 | /* Write a constant of a given type as target-ordered bytes into |
23369 | OBSTACK. */ | |
23370 | ||
23371 | static const gdb_byte * | |
23372 | write_constant_as_bytes (struct obstack *obstack, | |
23373 | enum bfd_endian byte_order, | |
23374 | struct type *type, | |
23375 | ULONGEST value, | |
23376 | LONGEST *len) | |
23377 | { | |
23378 | gdb_byte *result; | |
23379 | ||
23380 | *len = TYPE_LENGTH (type); | |
224c3ddb | 23381 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23382 | store_unsigned_integer (result, *len, byte_order, value); |
23383 | ||
23384 | return result; | |
23385 | } | |
23386 | ||
23387 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
23388 | pointer to the constant bytes and set LEN to the length of the | |
23389 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
23390 | does not have a DW_AT_const_value, return NULL. */ | |
23391 | ||
23392 | const gdb_byte * | |
9c541725 | 23393 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
23394 | struct dwarf2_per_cu_data *per_cu, |
23395 | struct obstack *obstack, | |
23396 | LONGEST *len) | |
23397 | { | |
23398 | struct dwarf2_cu *cu; | |
23399 | struct die_info *die; | |
23400 | struct attribute *attr; | |
23401 | const gdb_byte *result = NULL; | |
23402 | struct type *type; | |
23403 | LONGEST value; | |
23404 | enum bfd_endian byte_order; | |
e3b94546 | 23405 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 23406 | |
b6807d98 | 23407 | if (per_cu->cu == NULL) |
58f0c718 | 23408 | load_cu (per_cu, false); |
b6807d98 | 23409 | cu = per_cu->cu; |
cc12ce38 DE |
23410 | if (cu == NULL) |
23411 | { | |
23412 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23413 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23414 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23415 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23416 | } |
b6807d98 | 23417 | |
9c541725 | 23418 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23419 | if (!die) |
9d8780f0 SM |
23420 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23421 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23422 | |
23423 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23424 | if (attr == NULL) | |
23425 | return NULL; | |
23426 | ||
e3b94546 | 23427 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23428 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23429 | ||
23430 | switch (attr->form) | |
23431 | { | |
23432 | case DW_FORM_addr: | |
336d760d | 23433 | case DW_FORM_addrx: |
b6807d98 TT |
23434 | case DW_FORM_GNU_addr_index: |
23435 | { | |
23436 | gdb_byte *tem; | |
23437 | ||
23438 | *len = cu->header.addr_size; | |
224c3ddb | 23439 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23440 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
23441 | result = tem; | |
23442 | } | |
23443 | break; | |
23444 | case DW_FORM_string: | |
23445 | case DW_FORM_strp: | |
cf532bd1 | 23446 | case DW_FORM_strx: |
b6807d98 TT |
23447 | case DW_FORM_GNU_str_index: |
23448 | case DW_FORM_GNU_strp_alt: | |
23449 | /* DW_STRING is already allocated on the objfile obstack, point | |
23450 | directly to it. */ | |
23451 | result = (const gdb_byte *) DW_STRING (attr); | |
23452 | *len = strlen (DW_STRING (attr)); | |
23453 | break; | |
23454 | case DW_FORM_block1: | |
23455 | case DW_FORM_block2: | |
23456 | case DW_FORM_block4: | |
23457 | case DW_FORM_block: | |
23458 | case DW_FORM_exprloc: | |
0224619f | 23459 | case DW_FORM_data16: |
b6807d98 TT |
23460 | result = DW_BLOCK (attr)->data; |
23461 | *len = DW_BLOCK (attr)->size; | |
23462 | break; | |
23463 | ||
23464 | /* The DW_AT_const_value attributes are supposed to carry the | |
23465 | symbol's value "represented as it would be on the target | |
23466 | architecture." By the time we get here, it's already been | |
23467 | converted to host endianness, so we just need to sign- or | |
23468 | zero-extend it as appropriate. */ | |
23469 | case DW_FORM_data1: | |
23470 | type = die_type (die, cu); | |
23471 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23472 | if (result == NULL) | |
23473 | result = write_constant_as_bytes (obstack, byte_order, | |
23474 | type, value, len); | |
23475 | break; | |
23476 | case DW_FORM_data2: | |
23477 | type = die_type (die, cu); | |
23478 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23479 | if (result == NULL) | |
23480 | result = write_constant_as_bytes (obstack, byte_order, | |
23481 | type, value, len); | |
23482 | break; | |
23483 | case DW_FORM_data4: | |
23484 | type = die_type (die, cu); | |
23485 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23486 | if (result == NULL) | |
23487 | result = write_constant_as_bytes (obstack, byte_order, | |
23488 | type, value, len); | |
23489 | break; | |
23490 | case DW_FORM_data8: | |
23491 | type = die_type (die, cu); | |
23492 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23493 | if (result == NULL) | |
23494 | result = write_constant_as_bytes (obstack, byte_order, | |
23495 | type, value, len); | |
23496 | break; | |
23497 | ||
23498 | case DW_FORM_sdata: | |
663c44ac | 23499 | case DW_FORM_implicit_const: |
b6807d98 TT |
23500 | type = die_type (die, cu); |
23501 | result = write_constant_as_bytes (obstack, byte_order, | |
23502 | type, DW_SND (attr), len); | |
23503 | break; | |
23504 | ||
23505 | case DW_FORM_udata: | |
23506 | type = die_type (die, cu); | |
23507 | result = write_constant_as_bytes (obstack, byte_order, | |
23508 | type, DW_UNSND (attr), len); | |
23509 | break; | |
23510 | ||
23511 | default: | |
b98664d3 | 23512 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23513 | dwarf_form_name (attr->form)); |
23514 | break; | |
23515 | } | |
23516 | ||
23517 | return result; | |
23518 | } | |
23519 | ||
7942e96e AA |
23520 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
23521 | valid type for this die is found. */ | |
23522 | ||
23523 | struct type * | |
9c541725 | 23524 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
23525 | struct dwarf2_per_cu_data *per_cu) |
23526 | { | |
23527 | struct dwarf2_cu *cu; | |
23528 | struct die_info *die; | |
23529 | ||
7942e96e | 23530 | if (per_cu->cu == NULL) |
58f0c718 | 23531 | load_cu (per_cu, false); |
7942e96e AA |
23532 | cu = per_cu->cu; |
23533 | if (!cu) | |
23534 | return NULL; | |
23535 | ||
9c541725 | 23536 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23537 | if (!die) |
23538 | return NULL; | |
23539 | ||
23540 | return die_type (die, cu); | |
23541 | } | |
23542 | ||
8a9b8146 TT |
23543 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
23544 | PER_CU. */ | |
23545 | ||
23546 | struct type * | |
b64f50a1 | 23547 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
23548 | struct dwarf2_per_cu_data *per_cu) |
23549 | { | |
9c541725 | 23550 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 23551 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
23552 | } |
23553 | ||
ac9ec31b | 23554 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23555 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23556 | On exit *REF_CU is the CU of the result. |
23557 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23558 | |
23559 | static struct die_info * | |
ac9ec31b DE |
23560 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23561 | struct dwarf2_cu **ref_cu) | |
348e048f | 23562 | { |
348e048f | 23563 | struct die_info temp_die; |
c24bdb02 | 23564 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
23565 | struct die_info *die; |
23566 | ||
ac9ec31b DE |
23567 | /* While it might be nice to assert sig_type->type == NULL here, |
23568 | we can get here for DW_AT_imported_declaration where we need | |
23569 | the DIE not the type. */ | |
348e048f DE |
23570 | |
23571 | /* If necessary, add it to the queue and load its DIEs. */ | |
23572 | ||
95554aad | 23573 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 23574 | read_signatured_type (sig_type); |
348e048f | 23575 | |
348e048f | 23576 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 23577 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23578 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23579 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23580 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23581 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23582 | if (die) |
23583 | { | |
ed2dc618 | 23584 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 23585 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 23586 | |
796a7ff8 DE |
23587 | /* For .gdb_index version 7 keep track of included TUs. |
23588 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
23589 | if (dwarf2_per_objfile->index_table != NULL | |
23590 | && dwarf2_per_objfile->index_table->version <= 7) | |
23591 | { | |
23592 | VEC_safe_push (dwarf2_per_cu_ptr, | |
23593 | (*ref_cu)->per_cu->imported_symtabs, | |
23594 | sig_cu->per_cu); | |
23595 | } | |
23596 | ||
348e048f | 23597 | *ref_cu = sig_cu; |
c24bdb02 KS |
23598 | if (sig_cu != cu) |
23599 | sig_cu->ancestor = cu; | |
23600 | ||
348e048f DE |
23601 | return die; |
23602 | } | |
23603 | ||
ac9ec31b DE |
23604 | return NULL; |
23605 | } | |
23606 | ||
23607 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23608 | On entry *REF_CU is the CU of SRC_DIE. | |
23609 | On exit *REF_CU is the CU of the result. | |
23610 | The result is the DIE of the type. | |
23611 | If the referenced type cannot be found an error is thrown. */ | |
23612 | ||
23613 | static struct die_info * | |
ff39bb5e | 23614 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23615 | struct dwarf2_cu **ref_cu) |
23616 | { | |
23617 | ULONGEST signature = DW_SIGNATURE (attr); | |
23618 | struct signatured_type *sig_type; | |
23619 | struct die_info *die; | |
23620 | ||
23621 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23622 | ||
a2ce51a0 | 23623 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23624 | /* sig_type will be NULL if the signatured type is missing from |
23625 | the debug info. */ | |
23626 | if (sig_type == NULL) | |
23627 | { | |
23628 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
23629 | " from DIE at %s [in module %s]"), |
23630 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23631 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23632 | } |
23633 | ||
23634 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23635 | if (die == NULL) | |
23636 | { | |
23637 | dump_die_for_error (src_die); | |
23638 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23639 | " from DIE at %s [in module %s]"), |
23640 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23641 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23642 | } |
23643 | ||
23644 | return die; | |
23645 | } | |
23646 | ||
23647 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23648 | reading in and processing the type unit if necessary. */ | |
23649 | ||
23650 | static struct type * | |
23651 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23652 | struct dwarf2_cu *cu) | |
23653 | { | |
518817b3 SM |
23654 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23655 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
23656 | struct signatured_type *sig_type; |
23657 | struct dwarf2_cu *type_cu; | |
23658 | struct die_info *type_die; | |
23659 | struct type *type; | |
23660 | ||
a2ce51a0 | 23661 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23662 | /* sig_type will be NULL if the signatured type is missing from |
23663 | the debug info. */ | |
23664 | if (sig_type == NULL) | |
23665 | { | |
b98664d3 | 23666 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23667 | " from DIE at %s [in module %s]"), |
23668 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23669 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23670 | return build_error_marker_type (cu, die); |
23671 | } | |
23672 | ||
23673 | /* If we already know the type we're done. */ | |
23674 | if (sig_type->type != NULL) | |
23675 | return sig_type->type; | |
23676 | ||
23677 | type_cu = cu; | |
23678 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23679 | if (type_die != NULL) | |
23680 | { | |
23681 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23682 | is created. This is important, for example, because for c++ classes | |
23683 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23684 | type = read_type_die (type_die, type_cu); | |
23685 | if (type == NULL) | |
23686 | { | |
b98664d3 | 23687 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
23688 | " referenced from DIE at %s [in module %s]"), |
23689 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23690 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23691 | type = build_error_marker_type (cu, die); |
23692 | } | |
23693 | } | |
23694 | else | |
23695 | { | |
b98664d3 | 23696 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
23697 | " from DIE at %s [in module %s]"), |
23698 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23699 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23700 | type = build_error_marker_type (cu, die); |
23701 | } | |
23702 | sig_type->type = type; | |
23703 | ||
23704 | return type; | |
23705 | } | |
23706 | ||
23707 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23708 | reading in and processing the type unit if necessary. */ | |
23709 | ||
23710 | static struct type * | |
ff39bb5e | 23711 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23712 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23713 | { |
23714 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 23715 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
23716 | { |
23717 | struct dwarf2_cu *type_cu = cu; | |
23718 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23719 | ||
23720 | return read_type_die (type_die, type_cu); | |
23721 | } | |
23722 | else if (attr->form == DW_FORM_ref_sig8) | |
23723 | { | |
23724 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
23725 | } | |
23726 | else | |
23727 | { | |
518817b3 SM |
23728 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23729 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23730 | |
b98664d3 | 23731 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
23732 | " at %s [in module %s]"), |
23733 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 23734 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23735 | return build_error_marker_type (cu, die); |
23736 | } | |
348e048f DE |
23737 | } |
23738 | ||
e5fe5e75 | 23739 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23740 | |
23741 | static void | |
e5fe5e75 | 23742 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 23743 | { |
52dc124a | 23744 | struct signatured_type *sig_type; |
348e048f | 23745 | |
f4dc4d17 DE |
23746 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
23747 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
23748 | ||
6721b2ec DE |
23749 | /* We have the per_cu, but we need the signatured_type. |
23750 | Fortunately this is an easy translation. */ | |
23751 | gdb_assert (per_cu->is_debug_types); | |
23752 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23753 | |
6721b2ec | 23754 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23755 | |
52dc124a | 23756 | read_signatured_type (sig_type); |
348e048f | 23757 | |
6721b2ec | 23758 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
23759 | } |
23760 | ||
dee91e82 DE |
23761 | /* die_reader_func for read_signatured_type. |
23762 | This is identical to load_full_comp_unit_reader, | |
23763 | but is kept separate for now. */ | |
348e048f DE |
23764 | |
23765 | static void | |
dee91e82 | 23766 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 23767 | const gdb_byte *info_ptr, |
dee91e82 DE |
23768 | struct die_info *comp_unit_die, |
23769 | int has_children, | |
23770 | void *data) | |
348e048f | 23771 | { |
dee91e82 | 23772 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 23773 | |
dee91e82 DE |
23774 | gdb_assert (cu->die_hash == NULL); |
23775 | cu->die_hash = | |
23776 | htab_create_alloc_ex (cu->header.length / 12, | |
23777 | die_hash, | |
23778 | die_eq, | |
23779 | NULL, | |
23780 | &cu->comp_unit_obstack, | |
23781 | hashtab_obstack_allocate, | |
23782 | dummy_obstack_deallocate); | |
348e048f | 23783 | |
dee91e82 DE |
23784 | if (has_children) |
23785 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
23786 | &info_ptr, comp_unit_die); | |
23787 | cu->dies = comp_unit_die; | |
23788 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
23789 | |
23790 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 23791 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 23792 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
23793 | or we won't be able to build types correctly. |
23794 | Similarly, if we do not read the producer, we can not apply | |
23795 | producer-specific interpretation. */ | |
95554aad | 23796 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 23797 | } |
348e048f | 23798 | |
3019eac3 DE |
23799 | /* Read in a signatured type and build its CU and DIEs. |
23800 | If the type is a stub for the real type in a DWO file, | |
23801 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23802 | |
23803 | static void | |
23804 | read_signatured_type (struct signatured_type *sig_type) | |
23805 | { | |
23806 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 23807 | |
3019eac3 | 23808 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 23809 | gdb_assert (per_cu->cu == NULL); |
348e048f | 23810 | |
58f0c718 | 23811 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, false, |
f4dc4d17 | 23812 | read_signatured_type_reader, NULL); |
7ee85ab1 | 23813 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
23814 | } |
23815 | ||
c906108c SS |
23816 | /* Decode simple location descriptions. |
23817 | Given a pointer to a dwarf block that defines a location, compute | |
23818 | the location and return the value. | |
23819 | ||
4cecd739 DJ |
23820 | NOTE drow/2003-11-18: This function is called in two situations |
23821 | now: for the address of static or global variables (partial symbols | |
23822 | only) and for offsets into structures which are expected to be | |
23823 | (more or less) constant. The partial symbol case should go away, | |
23824 | and only the constant case should remain. That will let this | |
23825 | function complain more accurately. A few special modes are allowed | |
23826 | without complaint for global variables (for instance, global | |
23827 | register values and thread-local values). | |
c906108c SS |
23828 | |
23829 | A location description containing no operations indicates that the | |
4cecd739 | 23830 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
23831 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
23832 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
23833 | complaint. |
23834 | ||
23835 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
23836 | |
23837 | static CORE_ADDR | |
e7c27a73 | 23838 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 23839 | { |
518817b3 | 23840 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
23841 | size_t i; |
23842 | size_t size = blk->size; | |
d521ce57 | 23843 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23844 | CORE_ADDR stack[64]; |
23845 | int stacki; | |
23846 | unsigned int bytes_read, unsnd; | |
23847 | gdb_byte op; | |
c906108c | 23848 | |
21ae7a4d JK |
23849 | i = 0; |
23850 | stacki = 0; | |
23851 | stack[stacki] = 0; | |
23852 | stack[++stacki] = 0; | |
23853 | ||
23854 | while (i < size) | |
23855 | { | |
23856 | op = data[i++]; | |
23857 | switch (op) | |
23858 | { | |
23859 | case DW_OP_lit0: | |
23860 | case DW_OP_lit1: | |
23861 | case DW_OP_lit2: | |
23862 | case DW_OP_lit3: | |
23863 | case DW_OP_lit4: | |
23864 | case DW_OP_lit5: | |
23865 | case DW_OP_lit6: | |
23866 | case DW_OP_lit7: | |
23867 | case DW_OP_lit8: | |
23868 | case DW_OP_lit9: | |
23869 | case DW_OP_lit10: | |
23870 | case DW_OP_lit11: | |
23871 | case DW_OP_lit12: | |
23872 | case DW_OP_lit13: | |
23873 | case DW_OP_lit14: | |
23874 | case DW_OP_lit15: | |
23875 | case DW_OP_lit16: | |
23876 | case DW_OP_lit17: | |
23877 | case DW_OP_lit18: | |
23878 | case DW_OP_lit19: | |
23879 | case DW_OP_lit20: | |
23880 | case DW_OP_lit21: | |
23881 | case DW_OP_lit22: | |
23882 | case DW_OP_lit23: | |
23883 | case DW_OP_lit24: | |
23884 | case DW_OP_lit25: | |
23885 | case DW_OP_lit26: | |
23886 | case DW_OP_lit27: | |
23887 | case DW_OP_lit28: | |
23888 | case DW_OP_lit29: | |
23889 | case DW_OP_lit30: | |
23890 | case DW_OP_lit31: | |
23891 | stack[++stacki] = op - DW_OP_lit0; | |
23892 | break; | |
f1bea926 | 23893 | |
21ae7a4d JK |
23894 | case DW_OP_reg0: |
23895 | case DW_OP_reg1: | |
23896 | case DW_OP_reg2: | |
23897 | case DW_OP_reg3: | |
23898 | case DW_OP_reg4: | |
23899 | case DW_OP_reg5: | |
23900 | case DW_OP_reg6: | |
23901 | case DW_OP_reg7: | |
23902 | case DW_OP_reg8: | |
23903 | case DW_OP_reg9: | |
23904 | case DW_OP_reg10: | |
23905 | case DW_OP_reg11: | |
23906 | case DW_OP_reg12: | |
23907 | case DW_OP_reg13: | |
23908 | case DW_OP_reg14: | |
23909 | case DW_OP_reg15: | |
23910 | case DW_OP_reg16: | |
23911 | case DW_OP_reg17: | |
23912 | case DW_OP_reg18: | |
23913 | case DW_OP_reg19: | |
23914 | case DW_OP_reg20: | |
23915 | case DW_OP_reg21: | |
23916 | case DW_OP_reg22: | |
23917 | case DW_OP_reg23: | |
23918 | case DW_OP_reg24: | |
23919 | case DW_OP_reg25: | |
23920 | case DW_OP_reg26: | |
23921 | case DW_OP_reg27: | |
23922 | case DW_OP_reg28: | |
23923 | case DW_OP_reg29: | |
23924 | case DW_OP_reg30: | |
23925 | case DW_OP_reg31: | |
23926 | stack[++stacki] = op - DW_OP_reg0; | |
23927 | if (i < size) | |
23928 | dwarf2_complex_location_expr_complaint (); | |
23929 | break; | |
c906108c | 23930 | |
21ae7a4d JK |
23931 | case DW_OP_regx: |
23932 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
23933 | i += bytes_read; | |
23934 | stack[++stacki] = unsnd; | |
23935 | if (i < size) | |
23936 | dwarf2_complex_location_expr_complaint (); | |
23937 | break; | |
c906108c | 23938 | |
21ae7a4d JK |
23939 | case DW_OP_addr: |
23940 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
23941 | cu, &bytes_read); | |
23942 | i += bytes_read; | |
23943 | break; | |
d53d4ac5 | 23944 | |
21ae7a4d JK |
23945 | case DW_OP_const1u: |
23946 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
23947 | i += 1; | |
23948 | break; | |
23949 | ||
23950 | case DW_OP_const1s: | |
23951 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
23952 | i += 1; | |
23953 | break; | |
23954 | ||
23955 | case DW_OP_const2u: | |
23956 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
23957 | i += 2; | |
23958 | break; | |
23959 | ||
23960 | case DW_OP_const2s: | |
23961 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
23962 | i += 2; | |
23963 | break; | |
d53d4ac5 | 23964 | |
21ae7a4d JK |
23965 | case DW_OP_const4u: |
23966 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
23967 | i += 4; | |
23968 | break; | |
23969 | ||
23970 | case DW_OP_const4s: | |
23971 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
23972 | i += 4; | |
23973 | break; | |
23974 | ||
585861ea JK |
23975 | case DW_OP_const8u: |
23976 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
23977 | i += 8; | |
23978 | break; | |
23979 | ||
21ae7a4d JK |
23980 | case DW_OP_constu: |
23981 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
23982 | &bytes_read); | |
23983 | i += bytes_read; | |
23984 | break; | |
23985 | ||
23986 | case DW_OP_consts: | |
23987 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
23988 | i += bytes_read; | |
23989 | break; | |
23990 | ||
23991 | case DW_OP_dup: | |
23992 | stack[stacki + 1] = stack[stacki]; | |
23993 | stacki++; | |
23994 | break; | |
23995 | ||
23996 | case DW_OP_plus: | |
23997 | stack[stacki - 1] += stack[stacki]; | |
23998 | stacki--; | |
23999 | break; | |
24000 | ||
24001 | case DW_OP_plus_uconst: | |
24002 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
24003 | &bytes_read); | |
24004 | i += bytes_read; | |
24005 | break; | |
24006 | ||
24007 | case DW_OP_minus: | |
24008 | stack[stacki - 1] -= stack[stacki]; | |
24009 | stacki--; | |
24010 | break; | |
24011 | ||
24012 | case DW_OP_deref: | |
24013 | /* If we're not the last op, then we definitely can't encode | |
24014 | this using GDB's address_class enum. This is valid for partial | |
24015 | global symbols, although the variable's address will be bogus | |
24016 | in the psymtab. */ | |
24017 | if (i < size) | |
24018 | dwarf2_complex_location_expr_complaint (); | |
24019 | break; | |
24020 | ||
24021 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 24022 | case DW_OP_form_tls_address: |
21ae7a4d JK |
24023 | /* The top of the stack has the offset from the beginning |
24024 | of the thread control block at which the variable is located. */ | |
24025 | /* Nothing should follow this operator, so the top of stack would | |
24026 | be returned. */ | |
24027 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
24028 | address will be bogus in the psymtab. Make it always at least |
24029 | non-zero to not look as a variable garbage collected by linker | |
24030 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
24031 | if (i < size) |
24032 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 24033 | stack[stacki]++; |
21ae7a4d JK |
24034 | break; |
24035 | ||
24036 | case DW_OP_GNU_uninit: | |
24037 | break; | |
24038 | ||
336d760d | 24039 | case DW_OP_addrx: |
3019eac3 | 24040 | case DW_OP_GNU_addr_index: |
49f6c839 | 24041 | case DW_OP_GNU_const_index: |
3019eac3 DE |
24042 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
24043 | &bytes_read); | |
24044 | i += bytes_read; | |
24045 | break; | |
24046 | ||
21ae7a4d JK |
24047 | default: |
24048 | { | |
f39c6ffd | 24049 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
24050 | |
24051 | if (name) | |
b98664d3 | 24052 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
24053 | name); |
24054 | else | |
b98664d3 | 24055 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
24056 | op); |
24057 | } | |
24058 | ||
24059 | return (stack[stacki]); | |
d53d4ac5 | 24060 | } |
3c6e0cb3 | 24061 | |
21ae7a4d JK |
24062 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
24063 | outside of the allocated space. Also enforce minimum>0. */ | |
24064 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
24065 | { | |
b98664d3 | 24066 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
24067 | return 0; |
24068 | } | |
24069 | ||
24070 | if (stacki <= 0) | |
24071 | { | |
b98664d3 | 24072 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
24073 | return 0; |
24074 | } | |
24075 | } | |
24076 | return (stack[stacki]); | |
c906108c SS |
24077 | } |
24078 | ||
24079 | /* memory allocation interface */ | |
24080 | ||
c906108c | 24081 | static struct dwarf_block * |
7b5a2f43 | 24082 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 24083 | { |
8d749320 | 24084 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
24085 | } |
24086 | ||
c906108c | 24087 | static struct die_info * |
b60c80d6 | 24088 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
24089 | { |
24090 | struct die_info *die; | |
b60c80d6 DJ |
24091 | size_t size = sizeof (struct die_info); |
24092 | ||
24093 | if (num_attrs > 1) | |
24094 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 24095 | |
b60c80d6 | 24096 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
24097 | memset (die, 0, sizeof (struct die_info)); |
24098 | return (die); | |
24099 | } | |
2e276125 JB |
24100 | |
24101 | \f | |
24102 | /* Macro support. */ | |
24103 | ||
233d95b5 JK |
24104 | /* Return file name relative to the compilation directory of file number I in |
24105 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 24106 | responsible for freeing it. */ |
233d95b5 | 24107 | |
2e276125 | 24108 | static char * |
233d95b5 | 24109 | file_file_name (int file, struct line_header *lh) |
2e276125 | 24110 | { |
6a83a1e6 EZ |
24111 | /* Is the file number a valid index into the line header's file name |
24112 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 24113 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 24114 | { |
8c43009f | 24115 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 24116 | |
8c43009f PA |
24117 | if (!IS_ABSOLUTE_PATH (fe.name)) |
24118 | { | |
24119 | const char *dir = fe.include_dir (lh); | |
24120 | if (dir != NULL) | |
24121 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
24122 | } | |
24123 | return xstrdup (fe.name); | |
6a83a1e6 | 24124 | } |
2e276125 JB |
24125 | else |
24126 | { | |
6a83a1e6 EZ |
24127 | /* The compiler produced a bogus file number. We can at least |
24128 | record the macro definitions made in the file, even if we | |
24129 | won't be able to find the file by name. */ | |
24130 | char fake_name[80]; | |
9a619af0 | 24131 | |
8c042590 PM |
24132 | xsnprintf (fake_name, sizeof (fake_name), |
24133 | "<bad macro file number %d>", file); | |
2e276125 | 24134 | |
b98664d3 | 24135 | complaint (_("bad file number in macro information (%d)"), |
6a83a1e6 | 24136 | file); |
2e276125 | 24137 | |
6a83a1e6 | 24138 | return xstrdup (fake_name); |
2e276125 JB |
24139 | } |
24140 | } | |
24141 | ||
233d95b5 JK |
24142 | /* Return the full name of file number I in *LH's file name table. |
24143 | Use COMP_DIR as the name of the current directory of the | |
24144 | compilation. The result is allocated using xmalloc; the caller is | |
24145 | responsible for freeing it. */ | |
24146 | static char * | |
24147 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
24148 | { | |
24149 | /* Is the file number a valid index into the line header's file name | |
24150 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 24151 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
24152 | { |
24153 | char *relative = file_file_name (file, lh); | |
24154 | ||
24155 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
24156 | return relative; | |
b36cec19 PA |
24157 | return reconcat (relative, comp_dir, SLASH_STRING, |
24158 | relative, (char *) NULL); | |
233d95b5 JK |
24159 | } |
24160 | else | |
24161 | return file_file_name (file, lh); | |
24162 | } | |
24163 | ||
2e276125 JB |
24164 | |
24165 | static struct macro_source_file * | |
804d2729 TT |
24166 | macro_start_file (struct dwarf2_cu *cu, |
24167 | int file, int line, | |
2e276125 | 24168 | struct macro_source_file *current_file, |
43f3e411 | 24169 | struct line_header *lh) |
2e276125 | 24170 | { |
233d95b5 JK |
24171 | /* File name relative to the compilation directory of this source file. */ |
24172 | char *file_name = file_file_name (file, lh); | |
2e276125 | 24173 | |
2e276125 | 24174 | if (! current_file) |
abc9d0dc | 24175 | { |
fc474241 DE |
24176 | /* Note: We don't create a macro table for this compilation unit |
24177 | at all until we actually get a filename. */ | |
c24bdb02 | 24178 | struct macro_table *macro_table = cu->get_builder ()->get_macro_table (); |
fc474241 | 24179 | |
abc9d0dc TT |
24180 | /* If we have no current file, then this must be the start_file |
24181 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
24182 | current_file = macro_set_main (macro_table, file_name); |
24183 | macro_define_special (macro_table); | |
abc9d0dc | 24184 | } |
2e276125 | 24185 | else |
233d95b5 | 24186 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 24187 | |
233d95b5 | 24188 | xfree (file_name); |
6e70227d | 24189 | |
2e276125 JB |
24190 | return current_file; |
24191 | } | |
24192 | ||
2e276125 JB |
24193 | static const char * |
24194 | consume_improper_spaces (const char *p, const char *body) | |
24195 | { | |
24196 | if (*p == ' ') | |
24197 | { | |
b98664d3 | 24198 | complaint (_("macro definition contains spaces " |
3e43a32a | 24199 | "in formal argument list:\n`%s'"), |
4d3c2250 | 24200 | body); |
2e276125 JB |
24201 | |
24202 | while (*p == ' ') | |
24203 | p++; | |
24204 | } | |
24205 | ||
24206 | return p; | |
24207 | } | |
24208 | ||
24209 | ||
24210 | static void | |
24211 | parse_macro_definition (struct macro_source_file *file, int line, | |
24212 | const char *body) | |
24213 | { | |
24214 | const char *p; | |
24215 | ||
24216 | /* The body string takes one of two forms. For object-like macro | |
24217 | definitions, it should be: | |
24218 | ||
24219 | <macro name> " " <definition> | |
24220 | ||
24221 | For function-like macro definitions, it should be: | |
24222 | ||
24223 | <macro name> "() " <definition> | |
24224 | or | |
24225 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
24226 | ||
24227 | Spaces may appear only where explicitly indicated, and in the | |
24228 | <definition>. | |
24229 | ||
24230 | The Dwarf 2 spec says that an object-like macro's name is always | |
24231 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 24232 | the space when the macro's definition is the empty string. |
2e276125 JB |
24233 | |
24234 | The Dwarf 2 spec says that there should be no spaces between the | |
24235 | formal arguments in a function-like macro's formal argument list, | |
24236 | but versions of GCC around March 2002 include spaces after the | |
24237 | commas. */ | |
24238 | ||
24239 | ||
24240 | /* Find the extent of the macro name. The macro name is terminated | |
24241 | by either a space or null character (for an object-like macro) or | |
24242 | an opening paren (for a function-like macro). */ | |
24243 | for (p = body; *p; p++) | |
24244 | if (*p == ' ' || *p == '(') | |
24245 | break; | |
24246 | ||
24247 | if (*p == ' ' || *p == '\0') | |
24248 | { | |
24249 | /* It's an object-like macro. */ | |
24250 | int name_len = p - body; | |
3f8a7804 | 24251 | char *name = savestring (body, name_len); |
2e276125 JB |
24252 | const char *replacement; |
24253 | ||
24254 | if (*p == ' ') | |
24255 | replacement = body + name_len + 1; | |
24256 | else | |
24257 | { | |
4d3c2250 | 24258 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24259 | replacement = body + name_len; |
24260 | } | |
6e70227d | 24261 | |
2e276125 JB |
24262 | macro_define_object (file, line, name, replacement); |
24263 | ||
24264 | xfree (name); | |
24265 | } | |
24266 | else if (*p == '(') | |
24267 | { | |
24268 | /* It's a function-like macro. */ | |
3f8a7804 | 24269 | char *name = savestring (body, p - body); |
2e276125 JB |
24270 | int argc = 0; |
24271 | int argv_size = 1; | |
8d749320 | 24272 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
24273 | |
24274 | p++; | |
24275 | ||
24276 | p = consume_improper_spaces (p, body); | |
24277 | ||
24278 | /* Parse the formal argument list. */ | |
24279 | while (*p && *p != ')') | |
24280 | { | |
24281 | /* Find the extent of the current argument name. */ | |
24282 | const char *arg_start = p; | |
24283 | ||
24284 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
24285 | p++; | |
24286 | ||
24287 | if (! *p || p == arg_start) | |
4d3c2250 | 24288 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24289 | else |
24290 | { | |
24291 | /* Make sure argv has room for the new argument. */ | |
24292 | if (argc >= argv_size) | |
24293 | { | |
24294 | argv_size *= 2; | |
224c3ddb | 24295 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
24296 | } |
24297 | ||
3f8a7804 | 24298 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
24299 | } |
24300 | ||
24301 | p = consume_improper_spaces (p, body); | |
24302 | ||
24303 | /* Consume the comma, if present. */ | |
24304 | if (*p == ',') | |
24305 | { | |
24306 | p++; | |
24307 | ||
24308 | p = consume_improper_spaces (p, body); | |
24309 | } | |
24310 | } | |
24311 | ||
24312 | if (*p == ')') | |
24313 | { | |
24314 | p++; | |
24315 | ||
24316 | if (*p == ' ') | |
24317 | /* Perfectly formed definition, no complaints. */ | |
24318 | macro_define_function (file, line, name, | |
6e70227d | 24319 | argc, (const char **) argv, |
2e276125 JB |
24320 | p + 1); |
24321 | else if (*p == '\0') | |
24322 | { | |
24323 | /* Complain, but do define it. */ | |
4d3c2250 | 24324 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 24325 | macro_define_function (file, line, name, |
6e70227d | 24326 | argc, (const char **) argv, |
2e276125 JB |
24327 | p); |
24328 | } | |
24329 | else | |
24330 | /* Just complain. */ | |
4d3c2250 | 24331 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24332 | } |
24333 | else | |
24334 | /* Just complain. */ | |
4d3c2250 | 24335 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24336 | |
24337 | xfree (name); | |
24338 | { | |
24339 | int i; | |
24340 | ||
24341 | for (i = 0; i < argc; i++) | |
24342 | xfree (argv[i]); | |
24343 | } | |
24344 | xfree (argv); | |
24345 | } | |
24346 | else | |
4d3c2250 | 24347 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24348 | } |
24349 | ||
cf2c3c16 TT |
24350 | /* Skip some bytes from BYTES according to the form given in FORM. |
24351 | Returns the new pointer. */ | |
2e276125 | 24352 | |
d521ce57 TT |
24353 | static const gdb_byte * |
24354 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
24355 | enum dwarf_form form, |
24356 | unsigned int offset_size, | |
24357 | struct dwarf2_section_info *section) | |
2e276125 | 24358 | { |
cf2c3c16 | 24359 | unsigned int bytes_read; |
2e276125 | 24360 | |
cf2c3c16 | 24361 | switch (form) |
2e276125 | 24362 | { |
cf2c3c16 TT |
24363 | case DW_FORM_data1: |
24364 | case DW_FORM_flag: | |
24365 | ++bytes; | |
24366 | break; | |
24367 | ||
24368 | case DW_FORM_data2: | |
24369 | bytes += 2; | |
24370 | break; | |
24371 | ||
24372 | case DW_FORM_data4: | |
24373 | bytes += 4; | |
24374 | break; | |
24375 | ||
24376 | case DW_FORM_data8: | |
24377 | bytes += 8; | |
24378 | break; | |
24379 | ||
0224619f JK |
24380 | case DW_FORM_data16: |
24381 | bytes += 16; | |
24382 | break; | |
24383 | ||
cf2c3c16 TT |
24384 | case DW_FORM_string: |
24385 | read_direct_string (abfd, bytes, &bytes_read); | |
24386 | bytes += bytes_read; | |
24387 | break; | |
24388 | ||
24389 | case DW_FORM_sec_offset: | |
24390 | case DW_FORM_strp: | |
36586728 | 24391 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
24392 | bytes += offset_size; |
24393 | break; | |
24394 | ||
24395 | case DW_FORM_block: | |
24396 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
24397 | bytes += bytes_read; | |
24398 | break; | |
24399 | ||
24400 | case DW_FORM_block1: | |
24401 | bytes += 1 + read_1_byte (abfd, bytes); | |
24402 | break; | |
24403 | case DW_FORM_block2: | |
24404 | bytes += 2 + read_2_bytes (abfd, bytes); | |
24405 | break; | |
24406 | case DW_FORM_block4: | |
24407 | bytes += 4 + read_4_bytes (abfd, bytes); | |
24408 | break; | |
24409 | ||
336d760d | 24410 | case DW_FORM_addrx: |
cf2c3c16 | 24411 | case DW_FORM_sdata: |
cf532bd1 | 24412 | case DW_FORM_strx: |
cf2c3c16 | 24413 | case DW_FORM_udata: |
3019eac3 DE |
24414 | case DW_FORM_GNU_addr_index: |
24415 | case DW_FORM_GNU_str_index: | |
d521ce57 | 24416 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
24417 | if (bytes == NULL) |
24418 | { | |
24419 | dwarf2_section_buffer_overflow_complaint (section); | |
24420 | return NULL; | |
24421 | } | |
cf2c3c16 TT |
24422 | break; |
24423 | ||
663c44ac JK |
24424 | case DW_FORM_implicit_const: |
24425 | break; | |
24426 | ||
cf2c3c16 TT |
24427 | default: |
24428 | { | |
b98664d3 | 24429 | complaint (_("invalid form 0x%x in `%s'"), |
a32a8923 | 24430 | form, get_section_name (section)); |
cf2c3c16 TT |
24431 | return NULL; |
24432 | } | |
2e276125 JB |
24433 | } |
24434 | ||
cf2c3c16 TT |
24435 | return bytes; |
24436 | } | |
757a13d0 | 24437 | |
cf2c3c16 TT |
24438 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
24439 | opcode. Returns an updated pointer to the macro data buffer; or, | |
24440 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 24441 | |
d521ce57 | 24442 | static const gdb_byte * |
cf2c3c16 | 24443 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
24444 | const gdb_byte **opcode_definitions, |
24445 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
24446 | bfd *abfd, |
24447 | unsigned int offset_size, | |
24448 | struct dwarf2_section_info *section) | |
24449 | { | |
24450 | unsigned int bytes_read, i; | |
24451 | unsigned long arg; | |
d521ce57 | 24452 | const gdb_byte *defn; |
2e276125 | 24453 | |
cf2c3c16 | 24454 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 24455 | { |
b98664d3 | 24456 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
24457 | opcode); |
24458 | return NULL; | |
24459 | } | |
2e276125 | 24460 | |
cf2c3c16 TT |
24461 | defn = opcode_definitions[opcode]; |
24462 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
24463 | defn += bytes_read; | |
2e276125 | 24464 | |
cf2c3c16 TT |
24465 | for (i = 0; i < arg; ++i) |
24466 | { | |
aead7601 SM |
24467 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
24468 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 24469 | section); |
cf2c3c16 TT |
24470 | if (mac_ptr == NULL) |
24471 | { | |
24472 | /* skip_form_bytes already issued the complaint. */ | |
24473 | return NULL; | |
24474 | } | |
24475 | } | |
757a13d0 | 24476 | |
cf2c3c16 TT |
24477 | return mac_ptr; |
24478 | } | |
757a13d0 | 24479 | |
cf2c3c16 TT |
24480 | /* A helper function which parses the header of a macro section. |
24481 | If the macro section is the extended (for now called "GNU") type, | |
24482 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
24483 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 24484 | |
d521ce57 TT |
24485 | static const gdb_byte * |
24486 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 24487 | bfd *abfd, |
d521ce57 | 24488 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
24489 | unsigned int *offset_size, |
24490 | int section_is_gnu) | |
24491 | { | |
24492 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 24493 | |
cf2c3c16 TT |
24494 | if (section_is_gnu) |
24495 | { | |
24496 | unsigned int version, flags; | |
757a13d0 | 24497 | |
cf2c3c16 | 24498 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 24499 | if (version != 4 && version != 5) |
cf2c3c16 | 24500 | { |
b98664d3 | 24501 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
24502 | version); |
24503 | return NULL; | |
24504 | } | |
24505 | mac_ptr += 2; | |
757a13d0 | 24506 | |
cf2c3c16 TT |
24507 | flags = read_1_byte (abfd, mac_ptr); |
24508 | ++mac_ptr; | |
24509 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 24510 | |
cf2c3c16 TT |
24511 | if ((flags & 2) != 0) |
24512 | /* We don't need the line table offset. */ | |
24513 | mac_ptr += *offset_size; | |
757a13d0 | 24514 | |
cf2c3c16 TT |
24515 | /* Vendor opcode descriptions. */ |
24516 | if ((flags & 4) != 0) | |
24517 | { | |
24518 | unsigned int i, count; | |
757a13d0 | 24519 | |
cf2c3c16 TT |
24520 | count = read_1_byte (abfd, mac_ptr); |
24521 | ++mac_ptr; | |
24522 | for (i = 0; i < count; ++i) | |
24523 | { | |
24524 | unsigned int opcode, bytes_read; | |
24525 | unsigned long arg; | |
24526 | ||
24527 | opcode = read_1_byte (abfd, mac_ptr); | |
24528 | ++mac_ptr; | |
24529 | opcode_definitions[opcode] = mac_ptr; | |
24530 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24531 | mac_ptr += bytes_read; | |
24532 | mac_ptr += arg; | |
24533 | } | |
757a13d0 | 24534 | } |
cf2c3c16 | 24535 | } |
757a13d0 | 24536 | |
cf2c3c16 TT |
24537 | return mac_ptr; |
24538 | } | |
757a13d0 | 24539 | |
cf2c3c16 | 24540 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 24541 | including DW_MACRO_import. */ |
cf2c3c16 TT |
24542 | |
24543 | static void | |
804d2729 | 24544 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 24545 | bfd *abfd, |
d521ce57 | 24546 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 24547 | struct macro_source_file *current_file, |
43f3e411 | 24548 | struct line_header *lh, |
cf2c3c16 | 24549 | struct dwarf2_section_info *section, |
36586728 | 24550 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 24551 | unsigned int offset_size, |
8fc3fc34 | 24552 | htab_t include_hash) |
cf2c3c16 | 24553 | { |
804d2729 TT |
24554 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24555 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 24556 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
24557 | enum dwarf_macro_record_type macinfo_type; |
24558 | int at_commandline; | |
d521ce57 | 24559 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 24560 | |
cf2c3c16 TT |
24561 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
24562 | &offset_size, section_is_gnu); | |
24563 | if (mac_ptr == NULL) | |
24564 | { | |
24565 | /* We already issued a complaint. */ | |
24566 | return; | |
24567 | } | |
757a13d0 JK |
24568 | |
24569 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
24570 | GDB is still reading the definitions from command line. First | |
24571 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
24572 | to create CURRENT_FILE for the main source holding also the command line | |
24573 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
24574 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
24575 | ||
24576 | at_commandline = 1; | |
24577 | ||
24578 | do | |
24579 | { | |
24580 | /* Do we at least have room for a macinfo type byte? */ | |
24581 | if (mac_ptr >= mac_end) | |
24582 | { | |
f664829e | 24583 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
24584 | break; |
24585 | } | |
24586 | ||
aead7601 | 24587 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
24588 | mac_ptr++; |
24589 | ||
cf2c3c16 TT |
24590 | /* Note that we rely on the fact that the corresponding GNU and |
24591 | DWARF constants are the same. */ | |
132448f8 SM |
24592 | DIAGNOSTIC_PUSH |
24593 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
24594 | switch (macinfo_type) |
24595 | { | |
24596 | /* A zero macinfo type indicates the end of the macro | |
24597 | information. */ | |
24598 | case 0: | |
24599 | break; | |
2e276125 | 24600 | |
0af92d60 JK |
24601 | case DW_MACRO_define: |
24602 | case DW_MACRO_undef: | |
24603 | case DW_MACRO_define_strp: | |
24604 | case DW_MACRO_undef_strp: | |
24605 | case DW_MACRO_define_sup: | |
24606 | case DW_MACRO_undef_sup: | |
2e276125 | 24607 | { |
891d2f0b | 24608 | unsigned int bytes_read; |
2e276125 | 24609 | int line; |
d521ce57 | 24610 | const char *body; |
cf2c3c16 | 24611 | int is_define; |
2e276125 | 24612 | |
cf2c3c16 TT |
24613 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
24614 | mac_ptr += bytes_read; | |
24615 | ||
0af92d60 JK |
24616 | if (macinfo_type == DW_MACRO_define |
24617 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
24618 | { |
24619 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
24620 | mac_ptr += bytes_read; | |
24621 | } | |
24622 | else | |
24623 | { | |
24624 | LONGEST str_offset; | |
24625 | ||
24626 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24627 | mac_ptr += offset_size; | |
2e276125 | 24628 | |
0af92d60 JK |
24629 | if (macinfo_type == DW_MACRO_define_sup |
24630 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 24631 | || section_is_dwz) |
36586728 | 24632 | { |
ed2dc618 SM |
24633 | struct dwz_file *dwz |
24634 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 24635 | |
ed2dc618 SM |
24636 | body = read_indirect_string_from_dwz (objfile, |
24637 | dwz, str_offset); | |
36586728 TT |
24638 | } |
24639 | else | |
ed2dc618 SM |
24640 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
24641 | abfd, str_offset); | |
cf2c3c16 TT |
24642 | } |
24643 | ||
0af92d60 JK |
24644 | is_define = (macinfo_type == DW_MACRO_define |
24645 | || macinfo_type == DW_MACRO_define_strp | |
24646 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 24647 | if (! current_file) |
757a13d0 JK |
24648 | { |
24649 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 24650 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 24651 | "on line %d: %s"), |
cf2c3c16 TT |
24652 | is_define ? _("definition") : _("undefinition"), |
24653 | line, body); | |
757a13d0 JK |
24654 | break; |
24655 | } | |
3e43a32a MS |
24656 | if ((line == 0 && !at_commandline) |
24657 | || (line != 0 && at_commandline)) | |
b98664d3 | 24658 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 24659 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 24660 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
24661 | line == 0 ? _("zero") : _("non-zero"), line, body); |
24662 | ||
955b06fa | 24663 | if (body == NULL) |
7bede828 | 24664 | { |
955b06fa SDJ |
24665 | /* Fedora's rpm-build's "debugedit" binary |
24666 | corrupted .debug_macro sections. | |
24667 | ||
24668 | For more info, see | |
24669 | https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */ | |
24670 | complaint (_("debug info gives %s invalid macro %s " | |
24671 | "without body (corrupted?) at line %d " | |
24672 | "on file %s"), | |
24673 | at_commandline ? _("command-line") : _("in-file"), | |
24674 | is_define ? _("definition") : _("undefinition"), | |
24675 | line, current_file->filename); | |
7bede828 | 24676 | } |
955b06fa SDJ |
24677 | else if (is_define) |
24678 | parse_macro_definition (current_file, line, body); | |
cf2c3c16 TT |
24679 | else |
24680 | { | |
0af92d60 JK |
24681 | gdb_assert (macinfo_type == DW_MACRO_undef |
24682 | || macinfo_type == DW_MACRO_undef_strp | |
24683 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
24684 | macro_undef (current_file, line, body); |
24685 | } | |
2e276125 JB |
24686 | } |
24687 | break; | |
24688 | ||
0af92d60 | 24689 | case DW_MACRO_start_file: |
2e276125 | 24690 | { |
891d2f0b | 24691 | unsigned int bytes_read; |
2e276125 JB |
24692 | int line, file; |
24693 | ||
24694 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24695 | mac_ptr += bytes_read; | |
24696 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24697 | mac_ptr += bytes_read; | |
24698 | ||
3e43a32a MS |
24699 | if ((line == 0 && !at_commandline) |
24700 | || (line != 0 && at_commandline)) | |
b98664d3 | 24701 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
24702 | "from %s at %s line %d"), |
24703 | file, at_commandline ? _("command-line") : _("file"), | |
24704 | line == 0 ? _("zero") : _("non-zero"), line); | |
24705 | ||
24706 | if (at_commandline) | |
24707 | { | |
0af92d60 | 24708 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 24709 | pass one. */ |
757a13d0 JK |
24710 | at_commandline = 0; |
24711 | } | |
24712 | else | |
804d2729 TT |
24713 | current_file = macro_start_file (cu, file, line, current_file, |
24714 | lh); | |
2e276125 JB |
24715 | } |
24716 | break; | |
24717 | ||
0af92d60 | 24718 | case DW_MACRO_end_file: |
2e276125 | 24719 | if (! current_file) |
b98664d3 | 24720 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 24721 | "`close_file' directive")); |
2e276125 JB |
24722 | else |
24723 | { | |
24724 | current_file = current_file->included_by; | |
24725 | if (! current_file) | |
24726 | { | |
cf2c3c16 | 24727 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
24728 | |
24729 | /* GCC circa March 2002 doesn't produce the zero | |
24730 | type byte marking the end of the compilation | |
24731 | unit. Complain if it's not there, but exit no | |
24732 | matter what. */ | |
24733 | ||
24734 | /* Do we at least have room for a macinfo type byte? */ | |
24735 | if (mac_ptr >= mac_end) | |
24736 | { | |
f664829e | 24737 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
24738 | return; |
24739 | } | |
24740 | ||
24741 | /* We don't increment mac_ptr here, so this is just | |
24742 | a look-ahead. */ | |
aead7601 SM |
24743 | next_type |
24744 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
24745 | mac_ptr); | |
2e276125 | 24746 | if (next_type != 0) |
b98664d3 | 24747 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 24748 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
24749 | |
24750 | return; | |
24751 | } | |
24752 | } | |
24753 | break; | |
24754 | ||
0af92d60 JK |
24755 | case DW_MACRO_import: |
24756 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
24757 | { |
24758 | LONGEST offset; | |
8fc3fc34 | 24759 | void **slot; |
a036ba48 TT |
24760 | bfd *include_bfd = abfd; |
24761 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 24762 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 24763 | int is_dwz = section_is_dwz; |
d521ce57 | 24764 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
24765 | |
24766 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24767 | mac_ptr += offset_size; | |
24768 | ||
0af92d60 | 24769 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 24770 | { |
ed2dc618 | 24771 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 24772 | |
4d663531 | 24773 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 24774 | |
a036ba48 | 24775 | include_section = &dwz->macro; |
a32a8923 | 24776 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
24777 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
24778 | is_dwz = 1; | |
24779 | } | |
24780 | ||
24781 | new_mac_ptr = include_section->buffer + offset; | |
24782 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
24783 | ||
8fc3fc34 TT |
24784 | if (*slot != NULL) |
24785 | { | |
24786 | /* This has actually happened; see | |
24787 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 24788 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
24789 | ".debug_macro section")); |
24790 | } | |
24791 | else | |
24792 | { | |
d521ce57 | 24793 | *slot = (void *) new_mac_ptr; |
36586728 | 24794 | |
804d2729 | 24795 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 24796 | include_mac_end, current_file, lh, |
36586728 | 24797 | section, section_is_gnu, is_dwz, |
4d663531 | 24798 | offset_size, include_hash); |
8fc3fc34 | 24799 | |
d521ce57 | 24800 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 24801 | } |
cf2c3c16 TT |
24802 | } |
24803 | break; | |
24804 | ||
2e276125 | 24805 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
24806 | if (!section_is_gnu) |
24807 | { | |
24808 | unsigned int bytes_read; | |
2e276125 | 24809 | |
ac298888 TT |
24810 | /* This reads the constant, but since we don't recognize |
24811 | any vendor extensions, we ignore it. */ | |
24812 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
24813 | mac_ptr += bytes_read; |
24814 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24815 | mac_ptr += bytes_read; | |
2e276125 | 24816 | |
cf2c3c16 TT |
24817 | /* We don't recognize any vendor extensions. */ |
24818 | break; | |
24819 | } | |
24820 | /* FALLTHROUGH */ | |
24821 | ||
24822 | default: | |
24823 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 24824 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
24825 | section); |
24826 | if (mac_ptr == NULL) | |
24827 | return; | |
24828 | break; | |
2e276125 | 24829 | } |
132448f8 | 24830 | DIAGNOSTIC_POP |
757a13d0 | 24831 | } while (macinfo_type != 0); |
2e276125 | 24832 | } |
8e19ed76 | 24833 | |
cf2c3c16 | 24834 | static void |
09262596 | 24835 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 24836 | int section_is_gnu) |
cf2c3c16 | 24837 | { |
518817b3 SM |
24838 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24839 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 24840 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
24841 | struct line_header *lh = cu->line_header; |
24842 | bfd *abfd; | |
d521ce57 | 24843 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
24844 | struct macro_source_file *current_file = 0; |
24845 | enum dwarf_macro_record_type macinfo_type; | |
24846 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 24847 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 24848 | void **slot; |
09262596 DE |
24849 | struct dwarf2_section_info *section; |
24850 | const char *section_name; | |
24851 | ||
24852 | if (cu->dwo_unit != NULL) | |
24853 | { | |
24854 | if (section_is_gnu) | |
24855 | { | |
24856 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24857 | section_name = ".debug_macro.dwo"; | |
24858 | } | |
24859 | else | |
24860 | { | |
24861 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24862 | section_name = ".debug_macinfo.dwo"; | |
24863 | } | |
24864 | } | |
24865 | else | |
24866 | { | |
24867 | if (section_is_gnu) | |
24868 | { | |
24869 | section = &dwarf2_per_objfile->macro; | |
24870 | section_name = ".debug_macro"; | |
24871 | } | |
24872 | else | |
24873 | { | |
24874 | section = &dwarf2_per_objfile->macinfo; | |
24875 | section_name = ".debug_macinfo"; | |
24876 | } | |
24877 | } | |
cf2c3c16 | 24878 | |
bb5ed363 | 24879 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
24880 | if (section->buffer == NULL) |
24881 | { | |
b98664d3 | 24882 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
24883 | return; |
24884 | } | |
a32a8923 | 24885 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
24886 | |
24887 | /* First pass: Find the name of the base filename. | |
24888 | This filename is needed in order to process all macros whose definition | |
24889 | (or undefinition) comes from the command line. These macros are defined | |
24890 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
24891 | associated to the base file. | |
24892 | ||
24893 | To determine the base file name, we scan the macro definitions until we | |
24894 | reach the first DW_MACINFO_start_file entry. We then initialize | |
24895 | CURRENT_FILE accordingly so that any macro definition found before the | |
24896 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
24897 | ||
24898 | mac_ptr = section->buffer + offset; | |
24899 | mac_end = section->buffer + section->size; | |
24900 | ||
24901 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
24902 | &offset_size, section_is_gnu); | |
24903 | if (mac_ptr == NULL) | |
24904 | { | |
24905 | /* We already issued a complaint. */ | |
24906 | return; | |
24907 | } | |
24908 | ||
24909 | do | |
24910 | { | |
24911 | /* Do we at least have room for a macinfo type byte? */ | |
24912 | if (mac_ptr >= mac_end) | |
24913 | { | |
24914 | /* Complaint is printed during the second pass as GDB will probably | |
24915 | stop the first pass earlier upon finding | |
24916 | DW_MACINFO_start_file. */ | |
24917 | break; | |
24918 | } | |
24919 | ||
aead7601 | 24920 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
24921 | mac_ptr++; |
24922 | ||
24923 | /* Note that we rely on the fact that the corresponding GNU and | |
24924 | DWARF constants are the same. */ | |
132448f8 SM |
24925 | DIAGNOSTIC_PUSH |
24926 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
24927 | switch (macinfo_type) |
24928 | { | |
24929 | /* A zero macinfo type indicates the end of the macro | |
24930 | information. */ | |
24931 | case 0: | |
24932 | break; | |
24933 | ||
0af92d60 JK |
24934 | case DW_MACRO_define: |
24935 | case DW_MACRO_undef: | |
cf2c3c16 TT |
24936 | /* Only skip the data by MAC_PTR. */ |
24937 | { | |
24938 | unsigned int bytes_read; | |
24939 | ||
24940 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24941 | mac_ptr += bytes_read; | |
24942 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24943 | mac_ptr += bytes_read; | |
24944 | } | |
24945 | break; | |
24946 | ||
0af92d60 | 24947 | case DW_MACRO_start_file: |
cf2c3c16 TT |
24948 | { |
24949 | unsigned int bytes_read; | |
24950 | int line, file; | |
24951 | ||
24952 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24953 | mac_ptr += bytes_read; | |
24954 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24955 | mac_ptr += bytes_read; | |
24956 | ||
804d2729 | 24957 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
24958 | } |
24959 | break; | |
24960 | ||
0af92d60 | 24961 | case DW_MACRO_end_file: |
cf2c3c16 TT |
24962 | /* No data to skip by MAC_PTR. */ |
24963 | break; | |
24964 | ||
0af92d60 JK |
24965 | case DW_MACRO_define_strp: |
24966 | case DW_MACRO_undef_strp: | |
24967 | case DW_MACRO_define_sup: | |
24968 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
24969 | { |
24970 | unsigned int bytes_read; | |
24971 | ||
24972 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24973 | mac_ptr += bytes_read; | |
24974 | mac_ptr += offset_size; | |
24975 | } | |
24976 | break; | |
24977 | ||
0af92d60 JK |
24978 | case DW_MACRO_import: |
24979 | case DW_MACRO_import_sup: | |
cf2c3c16 | 24980 | /* Note that, according to the spec, a transparent include |
0af92d60 | 24981 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
24982 | skip this opcode. */ |
24983 | mac_ptr += offset_size; | |
24984 | break; | |
24985 | ||
24986 | case DW_MACINFO_vendor_ext: | |
24987 | /* Only skip the data by MAC_PTR. */ | |
24988 | if (!section_is_gnu) | |
24989 | { | |
24990 | unsigned int bytes_read; | |
24991 | ||
24992 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24993 | mac_ptr += bytes_read; | |
24994 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
24995 | mac_ptr += bytes_read; | |
24996 | } | |
24997 | /* FALLTHROUGH */ | |
24998 | ||
24999 | default: | |
25000 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 25001 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
25002 | section); |
25003 | if (mac_ptr == NULL) | |
25004 | return; | |
25005 | break; | |
25006 | } | |
132448f8 | 25007 | DIAGNOSTIC_POP |
cf2c3c16 TT |
25008 | } while (macinfo_type != 0 && current_file == NULL); |
25009 | ||
25010 | /* Second pass: Process all entries. | |
25011 | ||
25012 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
25013 | command-line macro definitions/undefinitions. This flag is unset when we | |
25014 | reach the first DW_MACINFO_start_file entry. */ | |
25015 | ||
fc4007c9 TT |
25016 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
25017 | htab_eq_pointer, | |
25018 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 25019 | mac_ptr = section->buffer + offset; |
fc4007c9 | 25020 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 25021 | *slot = (void *) mac_ptr; |
804d2729 | 25022 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 25023 | current_file, lh, section, |
fc4007c9 TT |
25024 | section_is_gnu, 0, offset_size, |
25025 | include_hash.get ()); | |
cf2c3c16 TT |
25026 | } |
25027 | ||
8e19ed76 | 25028 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 25029 | if so return true else false. */ |
380bca97 | 25030 | |
8e19ed76 | 25031 | static int |
6e5a29e1 | 25032 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
25033 | { |
25034 | return (attr == NULL ? 0 : | |
25035 | attr->form == DW_FORM_block1 | |
25036 | || attr->form == DW_FORM_block2 | |
25037 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
25038 | || attr->form == DW_FORM_block |
25039 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 25040 | } |
4c2df51b | 25041 | |
c6a0999f JB |
25042 | /* Return non-zero if ATTR's value is a section offset --- classes |
25043 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
25044 | You may use DW_UNSND (attr) to retrieve such offsets. | |
25045 | ||
25046 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
25047 | may have a value that belongs to more than one of these classes; it | |
25048 | would be ambiguous if we did, because we use the same forms for all | |
25049 | of them. */ | |
380bca97 | 25050 | |
3690dd37 | 25051 | static int |
6e5a29e1 | 25052 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
25053 | { |
25054 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
25055 | || attr->form == DW_FORM_data8 |
25056 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
25057 | } |
25058 | ||
3690dd37 JB |
25059 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
25060 | zero otherwise. When this function returns true, you can apply | |
25061 | dwarf2_get_attr_constant_value to it. | |
25062 | ||
25063 | However, note that for some attributes you must check | |
25064 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
25065 | and DW_FORM_data8 are members of both the constant class, and of | |
25066 | the classes that contain offsets into other debug sections | |
25067 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
25068 | that, if an attribute's can be either a constant or one of the | |
25069 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
25070 | taken as section offsets, not constants. |
25071 | ||
25072 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
25073 | cannot handle that. */ | |
380bca97 | 25074 | |
3690dd37 | 25075 | static int |
6e5a29e1 | 25076 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
25077 | { |
25078 | switch (attr->form) | |
25079 | { | |
25080 | case DW_FORM_sdata: | |
25081 | case DW_FORM_udata: | |
25082 | case DW_FORM_data1: | |
25083 | case DW_FORM_data2: | |
25084 | case DW_FORM_data4: | |
25085 | case DW_FORM_data8: | |
663c44ac | 25086 | case DW_FORM_implicit_const: |
3690dd37 JB |
25087 | return 1; |
25088 | default: | |
25089 | return 0; | |
25090 | } | |
25091 | } | |
25092 | ||
7771576e SA |
25093 | |
25094 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
25095 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
25096 | ||
25097 | static int | |
6e5a29e1 | 25098 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
25099 | { |
25100 | switch (attr->form) | |
25101 | { | |
25102 | case DW_FORM_ref_addr: | |
25103 | case DW_FORM_ref1: | |
25104 | case DW_FORM_ref2: | |
25105 | case DW_FORM_ref4: | |
25106 | case DW_FORM_ref8: | |
25107 | case DW_FORM_ref_udata: | |
25108 | case DW_FORM_GNU_ref_alt: | |
25109 | return 1; | |
25110 | default: | |
25111 | return 0; | |
25112 | } | |
25113 | } | |
25114 | ||
3019eac3 DE |
25115 | /* Return the .debug_loc section to use for CU. |
25116 | For DWO files use .debug_loc.dwo. */ | |
25117 | ||
25118 | static struct dwarf2_section_info * | |
25119 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
25120 | { | |
518817b3 SM |
25121 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25122 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 25123 | |
3019eac3 | 25124 | if (cu->dwo_unit) |
43988095 JK |
25125 | { |
25126 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
25127 | ||
25128 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
25129 | } | |
25130 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
25131 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
25132 | } |
25133 | ||
8cf6f0b1 TT |
25134 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
25135 | ||
25136 | static void | |
25137 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
25138 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 25139 | const struct attribute *attr) |
8cf6f0b1 | 25140 | { |
518817b3 SM |
25141 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25142 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
25143 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
25144 | ||
25145 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
25146 | |
25147 | baton->per_cu = cu->per_cu; | |
25148 | gdb_assert (baton->per_cu); | |
25149 | /* We don't know how long the location list is, but make sure we | |
25150 | don't run off the edge of the section. */ | |
3019eac3 DE |
25151 | baton->size = section->size - DW_UNSND (attr); |
25152 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 25153 | baton->base_address = cu->base_address; |
f664829e | 25154 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
25155 | } |
25156 | ||
4c2df51b | 25157 | static void |
ff39bb5e | 25158 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 25159 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 25160 | { |
518817b3 SM |
25161 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25162 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 25163 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 25164 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 25165 | |
3690dd37 | 25166 | if (attr_form_is_section_offset (attr) |
3019eac3 | 25167 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
25168 | the section. If so, fall through to the complaint in the |
25169 | other branch. */ | |
3019eac3 | 25170 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 25171 | { |
0d53c4c4 | 25172 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 25173 | |
8d749320 | 25174 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 25175 | |
8cf6f0b1 | 25176 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 25177 | |
d00adf39 | 25178 | if (cu->base_known == 0) |
b98664d3 | 25179 | complaint (_("Location list used without " |
3e43a32a | 25180 | "specifying the CU base address.")); |
4c2df51b | 25181 | |
f1e6e072 TT |
25182 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25183 | ? dwarf2_loclist_block_index | |
25184 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
25185 | SYMBOL_LOCATION_BATON (sym) = baton; |
25186 | } | |
25187 | else | |
25188 | { | |
25189 | struct dwarf2_locexpr_baton *baton; | |
25190 | ||
8d749320 | 25191 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
25192 | baton->per_cu = cu->per_cu; |
25193 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
25194 | |
25195 | if (attr_form_is_block (attr)) | |
25196 | { | |
25197 | /* Note that we're just copying the block's data pointer | |
25198 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
25199 | info_buffer for SYM's objfile; right now we never release |
25200 | that buffer, but when we do clean up properly this may | |
25201 | need to change. */ | |
0d53c4c4 DJ |
25202 | baton->size = DW_BLOCK (attr)->size; |
25203 | baton->data = DW_BLOCK (attr)->data; | |
25204 | } | |
25205 | else | |
25206 | { | |
25207 | dwarf2_invalid_attrib_class_complaint ("location description", | |
25208 | SYMBOL_NATURAL_NAME (sym)); | |
25209 | baton->size = 0; | |
0d53c4c4 | 25210 | } |
6e70227d | 25211 | |
f1e6e072 TT |
25212 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25213 | ? dwarf2_locexpr_block_index | |
25214 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
25215 | SYMBOL_LOCATION_BATON (sym) = baton; |
25216 | } | |
4c2df51b | 25217 | } |
6502dd73 | 25218 | |
9aa1f1e3 TT |
25219 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
25220 | came from a separate debuginfo file, then the master objfile is | |
25221 | returned. */ | |
ae0d2f24 UW |
25222 | |
25223 | struct objfile * | |
25224 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
25225 | { | |
e3b94546 | 25226 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
25227 | |
25228 | /* Return the master objfile, so that we can report and look up the | |
25229 | correct file containing this variable. */ | |
25230 | if (objfile->separate_debug_objfile_backlink) | |
25231 | objfile = objfile->separate_debug_objfile_backlink; | |
25232 | ||
25233 | return objfile; | |
25234 | } | |
25235 | ||
96408a79 SA |
25236 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
25237 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
25238 | CU_HEADERP first. */ | |
25239 | ||
25240 | static const struct comp_unit_head * | |
25241 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
25242 | struct dwarf2_per_cu_data *per_cu) | |
25243 | { | |
d521ce57 | 25244 | const gdb_byte *info_ptr; |
96408a79 SA |
25245 | |
25246 | if (per_cu->cu) | |
25247 | return &per_cu->cu->header; | |
25248 | ||
9c541725 | 25249 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
25250 | |
25251 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
25252 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
25253 | rcuh_kind::COMPILE); | |
96408a79 SA |
25254 | |
25255 | return cu_headerp; | |
25256 | } | |
25257 | ||
ae0d2f24 UW |
25258 | /* Return the address size given in the compilation unit header for CU. */ |
25259 | ||
98714339 | 25260 | int |
ae0d2f24 UW |
25261 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
25262 | { | |
96408a79 SA |
25263 | struct comp_unit_head cu_header_local; |
25264 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 25265 | |
96408a79 SA |
25266 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25267 | ||
25268 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
25269 | } |
25270 | ||
9eae7c52 TT |
25271 | /* Return the offset size given in the compilation unit header for CU. */ |
25272 | ||
25273 | int | |
25274 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
25275 | { | |
96408a79 SA |
25276 | struct comp_unit_head cu_header_local; |
25277 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 25278 | |
96408a79 SA |
25279 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25280 | ||
25281 | return cu_headerp->offset_size; | |
25282 | } | |
25283 | ||
25284 | /* See its dwarf2loc.h declaration. */ | |
25285 | ||
25286 | int | |
25287 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
25288 | { | |
25289 | struct comp_unit_head cu_header_local; | |
25290 | const struct comp_unit_head *cu_headerp; | |
25291 | ||
25292 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
25293 | ||
25294 | if (cu_headerp->version == 2) | |
25295 | return cu_headerp->addr_size; | |
25296 | else | |
25297 | return cu_headerp->offset_size; | |
181cebd4 JK |
25298 | } |
25299 | ||
9aa1f1e3 TT |
25300 | /* Return the text offset of the CU. The returned offset comes from |
25301 | this CU's objfile. If this objfile came from a separate debuginfo | |
25302 | file, then the offset may be different from the corresponding | |
25303 | offset in the parent objfile. */ | |
25304 | ||
25305 | CORE_ADDR | |
25306 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
25307 | { | |
e3b94546 | 25308 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
9aa1f1e3 TT |
25309 | |
25310 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
25311 | } | |
25312 | ||
9a49df9d AB |
25313 | /* Return a type that is a generic pointer type, the size of which matches |
25314 | the address size given in the compilation unit header for PER_CU. */ | |
25315 | static struct type * | |
25316 | dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu) | |
25317 | { | |
25318 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
25319 | struct type *void_type = objfile_type (objfile)->builtin_void; | |
25320 | struct type *addr_type = lookup_pointer_type (void_type); | |
25321 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
25322 | ||
25323 | if (TYPE_LENGTH (addr_type) == addr_size) | |
25324 | return addr_type; | |
25325 | ||
25326 | addr_type | |
25327 | = dwarf2_per_cu_addr_sized_int_type (per_cu, TYPE_UNSIGNED (addr_type)); | |
25328 | return addr_type; | |
25329 | } | |
25330 | ||
43988095 JK |
25331 | /* Return DWARF version number of PER_CU. */ |
25332 | ||
25333 | short | |
25334 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
25335 | { | |
25336 | return per_cu->dwarf_version; | |
25337 | } | |
25338 | ||
348e048f DE |
25339 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
25340 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
25341 | |
25342 | static struct dwarf2_per_cu_data * | |
9c541725 | 25343 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 25344 | unsigned int offset_in_dwz, |
ed2dc618 | 25345 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25346 | { |
25347 | struct dwarf2_per_cu_data *this_cu; | |
25348 | int low, high; | |
25349 | ||
ae038cb0 | 25350 | low = 0; |
b76e467d | 25351 | high = dwarf2_per_objfile->all_comp_units.size () - 1; |
ae038cb0 DJ |
25352 | while (high > low) |
25353 | { | |
36586728 | 25354 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 25355 | int mid = low + (high - low) / 2; |
9a619af0 | 25356 | |
36586728 | 25357 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
36586728 | 25358 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 25359 | || (mid_cu->is_dwz == offset_in_dwz |
45b8ae0c | 25360 | && mid_cu->sect_off + mid_cu->length >= sect_off)) |
ae038cb0 DJ |
25361 | high = mid; |
25362 | else | |
25363 | low = mid + 1; | |
25364 | } | |
25365 | gdb_assert (low == high); | |
36586728 | 25366 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
45b8ae0c | 25367 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 25368 | { |
36586728 | 25369 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 25370 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
25371 | "offset %s [in module %s]"), |
25372 | sect_offset_str (sect_off), | |
ed2dc618 | 25373 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 25374 | |
9c541725 PA |
25375 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
25376 | <= sect_off); | |
ae038cb0 DJ |
25377 | return dwarf2_per_objfile->all_comp_units[low-1]; |
25378 | } | |
25379 | else | |
25380 | { | |
b76e467d | 25381 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 25382 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 25383 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 25384 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
25385 | return this_cu; |
25386 | } | |
25387 | } | |
25388 | ||
23745b47 | 25389 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 25390 | |
fcd3b13d SM |
25391 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
25392 | : per_cu (per_cu_), | |
9068261f AB |
25393 | mark (false), |
25394 | has_loclist (false), | |
25395 | checked_producer (false), | |
25396 | producer_is_gxx_lt_4_6 (false), | |
25397 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 25398 | producer_is_icc (false), |
9068261f | 25399 | producer_is_icc_lt_14 (false), |
c258c396 | 25400 | producer_is_codewarrior (false), |
9068261f | 25401 | processing_has_namespace_info (false) |
93311388 | 25402 | { |
fcd3b13d SM |
25403 | per_cu->cu = this; |
25404 | } | |
25405 | ||
25406 | /* Destroy a dwarf2_cu. */ | |
25407 | ||
25408 | dwarf2_cu::~dwarf2_cu () | |
25409 | { | |
25410 | per_cu->cu = NULL; | |
9816fde3 JK |
25411 | } |
25412 | ||
25413 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
25414 | ||
25415 | static void | |
95554aad TT |
25416 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
25417 | enum language pretend_language) | |
9816fde3 JK |
25418 | { |
25419 | struct attribute *attr; | |
25420 | ||
25421 | /* Set the language we're debugging. */ | |
25422 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
25423 | if (attr) | |
25424 | set_cu_language (DW_UNSND (attr), cu); | |
25425 | else | |
9cded63f | 25426 | { |
95554aad | 25427 | cu->language = pretend_language; |
9cded63f TT |
25428 | cu->language_defn = language_def (cu->language); |
25429 | } | |
dee91e82 | 25430 | |
7d45c7c3 | 25431 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
25432 | } |
25433 | ||
ae038cb0 DJ |
25434 | /* Increase the age counter on each cached compilation unit, and free |
25435 | any that are too old. */ | |
25436 | ||
25437 | static void | |
ed2dc618 | 25438 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25439 | { |
25440 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
25441 | ||
25442 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
25443 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25444 | while (per_cu != NULL) | |
25445 | { | |
25446 | per_cu->cu->last_used ++; | |
b4f54984 | 25447 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
25448 | dwarf2_mark (per_cu->cu); |
25449 | per_cu = per_cu->cu->read_in_chain; | |
25450 | } | |
25451 | ||
25452 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25453 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25454 | while (per_cu != NULL) | |
25455 | { | |
25456 | struct dwarf2_per_cu_data *next_cu; | |
25457 | ||
25458 | next_cu = per_cu->cu->read_in_chain; | |
25459 | ||
25460 | if (!per_cu->cu->mark) | |
25461 | { | |
fcd3b13d | 25462 | delete per_cu->cu; |
ae038cb0 DJ |
25463 | *last_chain = next_cu; |
25464 | } | |
25465 | else | |
25466 | last_chain = &per_cu->cu->read_in_chain; | |
25467 | ||
25468 | per_cu = next_cu; | |
25469 | } | |
25470 | } | |
25471 | ||
25472 | /* Remove a single compilation unit from the cache. */ | |
25473 | ||
25474 | static void | |
dee91e82 | 25475 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
25476 | { |
25477 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
25478 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25479 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
25480 | |
25481 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25482 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25483 | while (per_cu != NULL) | |
25484 | { | |
25485 | struct dwarf2_per_cu_data *next_cu; | |
25486 | ||
25487 | next_cu = per_cu->cu->read_in_chain; | |
25488 | ||
dee91e82 | 25489 | if (per_cu == target_per_cu) |
ae038cb0 | 25490 | { |
fcd3b13d | 25491 | delete per_cu->cu; |
dee91e82 | 25492 | per_cu->cu = NULL; |
ae038cb0 DJ |
25493 | *last_chain = next_cu; |
25494 | break; | |
25495 | } | |
25496 | else | |
25497 | last_chain = &per_cu->cu->read_in_chain; | |
25498 | ||
25499 | per_cu = next_cu; | |
25500 | } | |
25501 | } | |
25502 | ||
dee91e82 DE |
25503 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
25504 | We store these in a hash table separate from the DIEs, and preserve them | |
25505 | when the DIEs are flushed out of cache. | |
25506 | ||
25507 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 25508 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
25509 | or the type may come from a DWO file. Furthermore, while it's more logical |
25510 | to use per_cu->section+offset, with Fission the section with the data is in | |
25511 | the DWO file but we don't know that section at the point we need it. | |
25512 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
25513 | because we can enter the lookup routine, get_die_type_at_offset, from | |
25514 | outside this file, and thus won't necessarily have PER_CU->cu. | |
25515 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 25516 | |
dee91e82 | 25517 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 25518 | { |
dee91e82 | 25519 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 25520 | sect_offset sect_off; |
1c379e20 DJ |
25521 | struct type *type; |
25522 | }; | |
25523 | ||
dee91e82 | 25524 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25525 | |
25526 | static hashval_t | |
dee91e82 | 25527 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 25528 | { |
9a3c8263 SM |
25529 | const struct dwarf2_per_cu_offset_and_type *ofs |
25530 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 25531 | |
9c541725 | 25532 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
25533 | } |
25534 | ||
dee91e82 | 25535 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25536 | |
25537 | static int | |
dee91e82 | 25538 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 25539 | { |
9a3c8263 SM |
25540 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
25541 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
25542 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
25543 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 25544 | |
dee91e82 | 25545 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 25546 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
25547 | } |
25548 | ||
25549 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
25550 | table if necessary. For convenience, return TYPE. |
25551 | ||
25552 | The DIEs reading must have careful ordering to: | |
25553 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
25554 | reading current DIE. | |
25555 | * Not trying to dereference contents of still incompletely read in types | |
25556 | while reading in other DIEs. | |
25557 | * Enable referencing still incompletely read in types just by a pointer to | |
25558 | the type without accessing its fields. | |
25559 | ||
25560 | Therefore caller should follow these rules: | |
25561 | * Try to fetch any prerequisite types we may need to build this DIE type | |
25562 | before building the type and calling set_die_type. | |
e71ec853 | 25563 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
25564 | possible before fetching more types to complete the current type. |
25565 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 25566 | |
f792889a | 25567 | static struct type * |
1c379e20 DJ |
25568 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
25569 | { | |
518817b3 SM |
25570 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25571 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 25572 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 25573 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
25574 | struct attribute *attr; |
25575 | struct dynamic_prop prop; | |
1c379e20 | 25576 | |
b4ba55a1 JB |
25577 | /* For Ada types, make sure that the gnat-specific data is always |
25578 | initialized (if not already set). There are a few types where | |
25579 | we should not be doing so, because the type-specific area is | |
25580 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
25581 | where the type-specific area is used to store the floatformat). | |
25582 | But this is not a problem, because the gnat-specific information | |
25583 | is actually not needed for these types. */ | |
25584 | if (need_gnat_info (cu) | |
25585 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
25586 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
25587 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
25588 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
25589 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
25590 | && !HAVE_GNAT_AUX_INFO (type)) |
25591 | INIT_GNAT_SPECIFIC (type); | |
25592 | ||
3f2f83dd KB |
25593 | /* Read DW_AT_allocated and set in type. */ |
25594 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
25595 | if (attr_form_is_block (attr)) | |
25596 | { | |
9a49df9d AB |
25597 | struct type *prop_type |
25598 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25599 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25600 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
25601 | } |
25602 | else if (attr != NULL) | |
25603 | { | |
b98664d3 | 25604 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 25605 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25606 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25607 | } |
25608 | ||
25609 | /* Read DW_AT_associated and set in type. */ | |
25610 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
25611 | if (attr_form_is_block (attr)) | |
25612 | { | |
9a49df9d AB |
25613 | struct type *prop_type |
25614 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25615 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25616 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
25617 | } |
25618 | else if (attr != NULL) | |
25619 | { | |
b98664d3 | 25620 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 25621 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25622 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25623 | } |
25624 | ||
3cdcd0ce JB |
25625 | /* Read DW_AT_data_location and set in type. */ |
25626 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d AB |
25627 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
25628 | dwarf2_per_cu_addr_type (cu->per_cu))) | |
50a82047 | 25629 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 25630 | |
dee91e82 | 25631 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25632 | { |
dee91e82 DE |
25633 | dwarf2_per_objfile->die_type_hash = |
25634 | htab_create_alloc_ex (127, | |
25635 | per_cu_offset_and_type_hash, | |
25636 | per_cu_offset_and_type_eq, | |
25637 | NULL, | |
25638 | &objfile->objfile_obstack, | |
25639 | hashtab_obstack_allocate, | |
25640 | dummy_obstack_deallocate); | |
f792889a | 25641 | } |
1c379e20 | 25642 | |
dee91e82 | 25643 | ofs.per_cu = cu->per_cu; |
9c541725 | 25644 | ofs.sect_off = die->sect_off; |
1c379e20 | 25645 | ofs.type = type; |
dee91e82 DE |
25646 | slot = (struct dwarf2_per_cu_offset_and_type **) |
25647 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 | 25648 | if (*slot) |
b98664d3 | 25649 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 25650 | sect_offset_str (die->sect_off)); |
8d749320 SM |
25651 | *slot = XOBNEW (&objfile->objfile_obstack, |
25652 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 25653 | **slot = ofs; |
f792889a | 25654 | return type; |
1c379e20 DJ |
25655 | } |
25656 | ||
9c541725 | 25657 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 25658 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
25659 | |
25660 | static struct type * | |
9c541725 | 25661 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 25662 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 25663 | { |
dee91e82 | 25664 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 25665 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 25666 | |
dee91e82 | 25667 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25668 | return NULL; |
1c379e20 | 25669 | |
dee91e82 | 25670 | ofs.per_cu = per_cu; |
9c541725 | 25671 | ofs.sect_off = sect_off; |
9a3c8263 SM |
25672 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
25673 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
25674 | if (slot) |
25675 | return slot->type; | |
25676 | else | |
25677 | return NULL; | |
25678 | } | |
25679 | ||
02142a6c | 25680 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
25681 | or return NULL if DIE does not have a saved type. */ |
25682 | ||
25683 | static struct type * | |
25684 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
25685 | { | |
9c541725 | 25686 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
25687 | } |
25688 | ||
10b3939b DJ |
25689 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
25690 | ||
25691 | static void | |
25692 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
25693 | struct dwarf2_per_cu_data *ref_per_cu) | |
25694 | { | |
25695 | void **slot; | |
25696 | ||
25697 | if (cu->dependencies == NULL) | |
25698 | cu->dependencies | |
25699 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
25700 | NULL, &cu->comp_unit_obstack, | |
25701 | hashtab_obstack_allocate, | |
25702 | dummy_obstack_deallocate); | |
25703 | ||
25704 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
25705 | if (*slot == NULL) | |
25706 | *slot = ref_per_cu; | |
25707 | } | |
1c379e20 | 25708 | |
f504f079 DE |
25709 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
25710 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
25711 | cache that we must keep because we are keeping CU. */ |
25712 | ||
10b3939b DJ |
25713 | static int |
25714 | dwarf2_mark_helper (void **slot, void *data) | |
25715 | { | |
25716 | struct dwarf2_per_cu_data *per_cu; | |
25717 | ||
25718 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
25719 | |
25720 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
25721 | reading of the chain. As such dependencies remain valid it is not much | |
25722 | useful to track and undo them during QUIT cleanups. */ | |
25723 | if (per_cu->cu == NULL) | |
25724 | return 1; | |
25725 | ||
10b3939b DJ |
25726 | if (per_cu->cu->mark) |
25727 | return 1; | |
9068261f | 25728 | per_cu->cu->mark = true; |
10b3939b DJ |
25729 | |
25730 | if (per_cu->cu->dependencies != NULL) | |
25731 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
25732 | ||
25733 | return 1; | |
25734 | } | |
25735 | ||
f504f079 DE |
25736 | /* Set the mark field in CU and in every other compilation unit in the |
25737 | cache that we must keep because we are keeping CU. */ | |
25738 | ||
ae038cb0 DJ |
25739 | static void |
25740 | dwarf2_mark (struct dwarf2_cu *cu) | |
25741 | { | |
25742 | if (cu->mark) | |
25743 | return; | |
9068261f | 25744 | cu->mark = true; |
10b3939b DJ |
25745 | if (cu->dependencies != NULL) |
25746 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
25747 | } |
25748 | ||
25749 | static void | |
25750 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
25751 | { | |
25752 | while (per_cu) | |
25753 | { | |
9068261f | 25754 | per_cu->cu->mark = false; |
ae038cb0 DJ |
25755 | per_cu = per_cu->cu->read_in_chain; |
25756 | } | |
72bf9492 DJ |
25757 | } |
25758 | ||
72bf9492 DJ |
25759 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
25760 | is its offset in .debug_info for this objfile. */ | |
25761 | ||
25762 | static hashval_t | |
25763 | partial_die_hash (const void *item) | |
25764 | { | |
9a3c8263 SM |
25765 | const struct partial_die_info *part_die |
25766 | = (const struct partial_die_info *) item; | |
9a619af0 | 25767 | |
9c541725 | 25768 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
25769 | } |
25770 | ||
25771 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
25772 | are equal if they have the same offset. */ | |
25773 | ||
25774 | static int | |
25775 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
25776 | { | |
9a3c8263 SM |
25777 | const struct partial_die_info *part_die_lhs |
25778 | = (const struct partial_die_info *) item_lhs; | |
25779 | const struct partial_die_info *part_die_rhs | |
25780 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 25781 | |
9c541725 | 25782 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
25783 | } |
25784 | ||
3c3bb058 AB |
25785 | struct cmd_list_element *set_dwarf_cmdlist; |
25786 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
25787 | |
25788 | static void | |
981a3fb3 | 25789 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 25790 | { |
b4f54984 | 25791 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 25792 | gdb_stdout); |
ae038cb0 DJ |
25793 | } |
25794 | ||
25795 | static void | |
981a3fb3 | 25796 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 25797 | { |
b4f54984 | 25798 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
25799 | } |
25800 | ||
cd4fb1b2 | 25801 | int dwarf_always_disassemble; |
437afbb8 | 25802 | |
437afbb8 | 25803 | static void |
cd4fb1b2 SM |
25804 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
25805 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25806 | { |
cd4fb1b2 SM |
25807 | fprintf_filtered (file, |
25808 | _("Whether to always disassemble " | |
25809 | "DWARF expressions is %s.\n"), | |
25810 | value); | |
9291a0cd TT |
25811 | } |
25812 | ||
9291a0cd | 25813 | static void |
cd4fb1b2 SM |
25814 | show_check_physname (struct ui_file *file, int from_tty, |
25815 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 25816 | { |
cd4fb1b2 SM |
25817 | fprintf_filtered (file, |
25818 | _("Whether to check \"physname\" is %s.\n"), | |
25819 | value); | |
9291a0cd TT |
25820 | } |
25821 | ||
cd4fb1b2 SM |
25822 | void |
25823 | _initialize_dwarf2_read (void) | |
9291a0cd | 25824 | { |
cd4fb1b2 SM |
25825 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
25826 | Set DWARF specific variables.\n\ | |
590042fc | 25827 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
25828 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
25829 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 25830 | |
cd4fb1b2 | 25831 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
25832 | Show DWARF specific variables.\n\ |
25833 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
25834 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
25835 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 25836 | |
cd4fb1b2 SM |
25837 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
25838 | &dwarf_max_cache_age, _("\ | |
25839 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
25840 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
25841 | A higher limit means that cached compilation units will be stored\n\ | |
25842 | in memory longer, and more total memory will be used. Zero disables\n\ | |
25843 | caching, which can slow down startup."), | |
25844 | NULL, | |
25845 | show_dwarf_max_cache_age, | |
25846 | &set_dwarf_cmdlist, | |
25847 | &show_dwarf_cmdlist); | |
156942c7 | 25848 | |
cd4fb1b2 SM |
25849 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
25850 | &dwarf_always_disassemble, _("\ | |
25851 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
25852 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
25853 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
25854 | syntax. When disabled, expressions will be printed in a more\n\ | |
25855 | conversational style, when possible."), | |
25856 | NULL, | |
25857 | show_dwarf_always_disassemble, | |
25858 | &set_dwarf_cmdlist, | |
25859 | &show_dwarf_cmdlist); | |
9291a0cd | 25860 | |
cd4fb1b2 SM |
25861 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
25862 | Set debugging of the DWARF reader."), _("\ | |
25863 | Show debugging of the DWARF reader."), _("\ | |
25864 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
25865 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
25866 | information. A value greater than 1 provides more verbose information."), | |
25867 | NULL, | |
25868 | NULL, | |
25869 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25870 | |
cd4fb1b2 SM |
25871 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
25872 | Set debugging of the DWARF DIE reader."), _("\ | |
25873 | Show debugging of the DWARF DIE reader."), _("\ | |
25874 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
25875 | The value is the maximum depth to print."), | |
25876 | NULL, | |
25877 | NULL, | |
25878 | &setdebuglist, &showdebuglist); | |
9291a0cd | 25879 | |
cd4fb1b2 SM |
25880 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
25881 | Set debugging of the dwarf line reader."), _("\ | |
25882 | Show debugging of the dwarf line reader."), _("\ | |
25883 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
25884 | A value of 1 (one) provides basic information.\n\ | |
25885 | A value greater than 1 provides more verbose information."), | |
25886 | NULL, | |
25887 | NULL, | |
25888 | &setdebuglist, &showdebuglist); | |
437afbb8 | 25889 | |
cd4fb1b2 SM |
25890 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
25891 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
25892 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
25893 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
25894 | the demangler."), | |
25895 | NULL, show_check_physname, | |
25896 | &setdebuglist, &showdebuglist); | |
900e11f9 | 25897 | |
e615022a DE |
25898 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
25899 | no_class, &use_deprecated_index_sections, _("\ | |
25900 | Set whether to use deprecated gdb_index sections."), _("\ | |
25901 | Show whether to use deprecated gdb_index sections."), _("\ | |
25902 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
25903 | Normally they are ignored either because of a missing feature or\n\ | |
25904 | performance issue.\n\ | |
25905 | Warning: This option must be enabled before gdb reads the file."), | |
25906 | NULL, | |
25907 | NULL, | |
25908 | &setlist, &showlist); | |
25909 | ||
f1e6e072 TT |
25910 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
25911 | &dwarf2_locexpr_funcs); | |
25912 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
25913 | &dwarf2_loclist_funcs); | |
25914 | ||
25915 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25916 | &dwarf2_block_frame_base_locexpr_funcs); | |
25917 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
25918 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
25919 | |
25920 | #if GDB_SELF_TEST | |
25921 | selftests::register_test ("dw2_expand_symtabs_matching", | |
25922 | selftests::dw2_expand_symtabs_matching::run_test); | |
25923 | #endif | |
6502dd73 | 25924 | } |