Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
3666a048 | 3 | Copyright (C) 1994-2021 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c | 31 | #include "defs.h" |
82ca8957 | 32 | #include "dwarf2/read.h" |
3054dd54 | 33 | #include "dwarf2/abbrev.h" |
162dce55 | 34 | #include "dwarf2/attribute.h" |
cd53fa40 | 35 | #include "dwarf2/comp-unit-head.h" |
8ae78a44 | 36 | #include "dwarf2/cu.h" |
82ca8957 TT |
37 | #include "dwarf2/index-cache.h" |
38 | #include "dwarf2/index-common.h" | |
f4382c45 | 39 | #include "dwarf2/leb.h" |
8fdd972c | 40 | #include "dwarf2/line-header.h" |
9fda78b6 | 41 | #include "dwarf2/dwz.h" |
c90ec28a | 42 | #include "dwarf2/macro.h" |
c2d50fd0 | 43 | #include "dwarf2/die.h" |
c2a62a3d | 44 | #include "dwarf2/sect-names.h" |
2b2558bf | 45 | #include "dwarf2/stringify.h" |
70182375 | 46 | #include "dwarf2/public.h" |
4de283e4 TT |
47 | #include "bfd.h" |
48 | #include "elf-bfd.h" | |
49 | #include "symtab.h" | |
50 | #include "gdbtypes.h" | |
51 | #include "objfiles.h" | |
d55e5aa6 | 52 | #include "dwarf2.h" |
4de283e4 TT |
53 | #include "demangle.h" |
54 | #include "gdb-demangle.h" | |
4de283e4 | 55 | #include "filenames.h" /* for DOSish file names */ |
4de283e4 TT |
56 | #include "language.h" |
57 | #include "complaints.h" | |
82ca8957 TT |
58 | #include "dwarf2/expr.h" |
59 | #include "dwarf2/loc.h" | |
4de283e4 TT |
60 | #include "cp-support.h" |
61 | #include "hashtab.h" | |
62 | #include "command.h" | |
d55e5aa6 | 63 | #include "gdbcmd.h" |
4de283e4 TT |
64 | #include "block.h" |
65 | #include "addrmap.h" | |
66 | #include "typeprint.h" | |
67 | #include "psympriv.h" | |
4de283e4 | 68 | #include "c-lang.h" |
d55e5aa6 | 69 | #include "go-lang.h" |
4de283e4 TT |
70 | #include "valprint.h" |
71 | #include "gdbcore.h" /* for gnutarget */ | |
72 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
73 | #include "gdb_bfd.h" |
74 | #include "f-lang.h" | |
75 | #include "source.h" | |
4de283e4 | 76 | #include "build-id.h" |
d55e5aa6 | 77 | #include "namespace.h" |
268a13a5 TT |
78 | #include "gdbsupport/function-view.h" |
79 | #include "gdbsupport/gdb_optional.h" | |
80 | #include "gdbsupport/underlying.h" | |
268a13a5 | 81 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 82 | #include "filename-seen-cache.h" |
b32b108a | 83 | #include "producer.h" |
4de283e4 | 84 | #include <fcntl.h> |
4de283e4 | 85 | #include <algorithm> |
4de283e4 | 86 | #include <unordered_map> |
268a13a5 | 87 | #include "gdbsupport/selftest.h" |
c9317f21 | 88 | #include "rust-lang.h" |
268a13a5 | 89 | #include "gdbsupport/pathstuff.h" |
edd45eb0 | 90 | #include "count-one-bits.h" |
9fc29955 | 91 | #include <unordered_set> |
437afbb8 | 92 | |
73be47f5 DE |
93 | /* When == 1, print basic high level tracing messages. |
94 | When > 1, be more verbose. | |
b4f54984 DE |
95 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
96 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 97 | |
6f738b01 SM |
98 | /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 1. */ |
99 | ||
100 | #define dwarf_read_debug_printf(fmt, ...) \ | |
74b773fc SM |
101 | debug_prefixed_printf_cond (dwarf_read_debug >= 1, "dwarf-read", fmt, \ |
102 | ##__VA_ARGS__) | |
6f738b01 SM |
103 | |
104 | /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 2. */ | |
105 | ||
106 | #define dwarf_read_debug_printf_v(fmt, ...) \ | |
74b773fc SM |
107 | debug_prefixed_printf_cond (dwarf_read_debug >= 2, "dwarf-read", fmt, \ |
108 | ##__VA_ARGS__) | |
6f738b01 | 109 | |
749369c4 SM |
110 | /* When true, dump DIEs after they are read in. */ |
111 | static bool dwarf_die_debug = false; | |
d97bc12b | 112 | |
27e0867f | 113 | /* When non-zero, dump line number entries as they are read in. */ |
8fdd972c | 114 | unsigned int dwarf_line_debug = 0; |
27e0867f | 115 | |
491144b5 CB |
116 | /* When true, cross-check physname against demangler. */ |
117 | static bool check_physname = false; | |
900e11f9 | 118 | |
491144b5 CB |
119 | /* When true, do not reject deprecated .gdb_index sections. */ |
120 | static bool use_deprecated_index_sections = false; | |
481860b3 | 121 | |
17ee85fc TT |
122 | /* This is used to store the data that is always per objfile. */ |
123 | static const objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; | |
124 | ||
125 | /* These are used to store the dwarf2_per_bfd objects. | |
126 | ||
127 | objfiles having the same BFD, which doesn't require relocations, are going to | |
128 | share a dwarf2_per_bfd object, which is held in the _bfd_data_key version. | |
129 | ||
130 | Other objfiles are not going to share a dwarf2_per_bfd with any other | |
131 | objfiles, so they'll have their own version kept in the _objfile_data_key | |
132 | version. */ | |
133 | static const struct bfd_key<dwarf2_per_bfd> dwarf2_per_bfd_bfd_data_key; | |
134 | static const struct objfile_key<dwarf2_per_bfd> dwarf2_per_bfd_objfile_data_key; | |
6502dd73 | 135 | |
f1e6e072 TT |
136 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
137 | ||
138 | static int dwarf2_locexpr_index; | |
139 | static int dwarf2_loclist_index; | |
140 | static int dwarf2_locexpr_block_index; | |
141 | static int dwarf2_loclist_block_index; | |
142 | ||
41144253 | 143 | /* Size of .debug_loclists section header for 32-bit DWARF format. */ |
144 | #define LOCLIST_HEADER_SIZE32 12 | |
145 | ||
146 | /* Size of .debug_loclists section header for 64-bit DWARF format. */ | |
147 | #define LOCLIST_HEADER_SIZE64 20 | |
148 | ||
d0ce17d8 CT |
149 | /* Size of .debug_rnglists section header for 32-bit DWARF format. */ |
150 | #define RNGLIST_HEADER_SIZE32 12 | |
151 | ||
152 | /* Size of .debug_rnglists section header for 64-bit DWARF format. */ | |
153 | #define RNGLIST_HEADER_SIZE64 20 | |
154 | ||
3f563c84 PA |
155 | /* An index into a (C++) symbol name component in a symbol name as |
156 | recorded in the mapped_index's symbol table. For each C++ symbol | |
157 | in the symbol table, we record one entry for the start of each | |
158 | component in the symbol in a table of name components, and then | |
159 | sort the table, in order to be able to binary search symbol names, | |
160 | ignoring leading namespaces, both completion and regular look up. | |
161 | For example, for symbol "A::B::C", we'll have an entry that points | |
162 | to "A::B::C", another that points to "B::C", and another for "C". | |
163 | Note that function symbols in GDB index have no parameter | |
164 | information, just the function/method names. You can convert a | |
165 | name_component to a "const char *" using the | |
166 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
167 | ||
168 | struct name_component | |
169 | { | |
170 | /* Offset in the symbol name where the component starts. Stored as | |
171 | a (32-bit) offset instead of a pointer to save memory and improve | |
172 | locality on 64-bit architectures. */ | |
173 | offset_type name_offset; | |
174 | ||
175 | /* The symbol's index in the symbol and constant pool tables of a | |
176 | mapped_index. */ | |
177 | offset_type idx; | |
178 | }; | |
179 | ||
44ed8f3e PA |
180 | /* Base class containing bits shared by both .gdb_index and |
181 | .debug_name indexes. */ | |
182 | ||
183 | struct mapped_index_base | |
184 | { | |
22ca247e TT |
185 | mapped_index_base () = default; |
186 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
187 | ||
44ed8f3e PA |
188 | /* The name_component table (a sorted vector). See name_component's |
189 | description above. */ | |
190 | std::vector<name_component> name_components; | |
191 | ||
192 | /* How NAME_COMPONENTS is sorted. */ | |
193 | enum case_sensitivity name_components_casing; | |
194 | ||
195 | /* Return the number of names in the symbol table. */ | |
196 | virtual size_t symbol_name_count () const = 0; | |
197 | ||
198 | /* Get the name of the symbol at IDX in the symbol table. */ | |
fcf23d5b SM |
199 | virtual const char *symbol_name_at |
200 | (offset_type idx, dwarf2_per_objfile *per_objfile) const = 0; | |
44ed8f3e PA |
201 | |
202 | /* Return whether the name at IDX in the symbol table should be | |
203 | ignored. */ | |
204 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
205 | { | |
206 | return false; | |
207 | } | |
208 | ||
209 | /* Build the symbol name component sorted vector, if we haven't | |
210 | yet. */ | |
fcf23d5b | 211 | void build_name_components (dwarf2_per_objfile *per_objfile); |
44ed8f3e PA |
212 | |
213 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
214 | possible matches for LN_NO_PARAMS in the name component | |
215 | vector. */ | |
216 | std::pair<std::vector<name_component>::const_iterator, | |
217 | std::vector<name_component>::const_iterator> | |
3b00ef10 | 218 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
fcf23d5b SM |
219 | enum language lang, |
220 | dwarf2_per_objfile *per_objfile) const; | |
44ed8f3e PA |
221 | |
222 | /* Prevent deleting/destroying via a base class pointer. */ | |
223 | protected: | |
224 | ~mapped_index_base() = default; | |
225 | }; | |
226 | ||
42c2c694 TT |
227 | /* This is a view into the index that converts from bytes to an |
228 | offset_type, and allows indexing. Unaligned bytes are specifically | |
229 | allowed here, and handled via unpacking. */ | |
230 | ||
231 | class offset_view | |
232 | { | |
233 | public: | |
234 | offset_view () = default; | |
235 | ||
236 | explicit offset_view (gdb::array_view<const gdb_byte> bytes) | |
237 | : m_bytes (bytes) | |
238 | { | |
239 | } | |
240 | ||
241 | /* Extract the INDEXth offset_type from the array. */ | |
242 | offset_type operator[] (size_t index) const | |
243 | { | |
244 | const gdb_byte *bytes = &m_bytes[index * sizeof (offset_type)]; | |
245 | return (offset_type) extract_unsigned_integer (bytes, | |
246 | sizeof (offset_type), | |
247 | BFD_ENDIAN_LITTLE); | |
248 | } | |
249 | ||
250 | /* Return the number of offset_types in this array. */ | |
251 | size_t size () const | |
252 | { | |
253 | return m_bytes.size () / sizeof (offset_type); | |
254 | } | |
255 | ||
256 | /* Return true if this view is empty. */ | |
257 | bool empty () const | |
258 | { | |
259 | return m_bytes.empty (); | |
260 | } | |
261 | ||
262 | private: | |
263 | /* The underlying bytes. */ | |
264 | gdb::array_view<const gdb_byte> m_bytes; | |
265 | }; | |
266 | ||
9291a0cd TT |
267 | /* A description of the mapped index. The file format is described in |
268 | a comment by the code that writes the index. */ | |
fc898b42 | 269 | struct mapped_index final : public mapped_index_base |
9291a0cd | 270 | { |
559a7a62 | 271 | /* Index data format version. */ |
3063847f | 272 | int version = 0; |
559a7a62 | 273 | |
f00a2de2 PA |
274 | /* The address table data. */ |
275 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 276 | |
3876f04e | 277 | /* The symbol table, implemented as a hash table. */ |
42c2c694 | 278 | offset_view symbol_table; |
b11b1f88 | 279 | |
9291a0cd | 280 | /* A pointer to the constant pool. */ |
42c2c694 TT |
281 | gdb::array_view<const gdb_byte> constant_pool; |
282 | ||
283 | /* Return the index into the constant pool of the name of the IDXth | |
284 | symbol in the symbol table. */ | |
285 | offset_type symbol_name_index (offset_type idx) const | |
286 | { | |
287 | return symbol_table[2 * idx]; | |
288 | } | |
289 | ||
290 | /* Return the index into the constant pool of the CU vector of the | |
291 | IDXth symbol in the symbol table. */ | |
292 | offset_type symbol_vec_index (offset_type idx) const | |
293 | { | |
294 | return symbol_table[2 * idx + 1]; | |
295 | } | |
3f563c84 | 296 | |
44ed8f3e PA |
297 | bool symbol_name_slot_invalid (offset_type idx) const override |
298 | { | |
42c2c694 TT |
299 | return (symbol_name_index (idx) == 0 |
300 | && symbol_vec_index (idx) == 0); | |
44ed8f3e | 301 | } |
5c58de74 | 302 | |
3f563c84 PA |
303 | /* Convenience method to get at the name of the symbol at IDX in the |
304 | symbol table. */ | |
fcf23d5b SM |
305 | const char *symbol_name_at |
306 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
42c2c694 TT |
307 | { |
308 | return (const char *) (this->constant_pool.data () | |
309 | + symbol_name_index (idx)); | |
310 | } | |
5c58de74 | 311 | |
44ed8f3e | 312 | size_t symbol_name_count () const override |
42c2c694 | 313 | { return this->symbol_table.size () / 2; } |
9291a0cd TT |
314 | }; |
315 | ||
927aa2e7 JK |
316 | /* A description of the mapped .debug_names. |
317 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 318 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 JK |
319 | { |
320 | bfd_endian dwarf5_byte_order; | |
321 | bool dwarf5_is_dwarf64; | |
322 | bool augmentation_is_gdb; | |
323 | uint8_t offset_size; | |
324 | uint32_t cu_count = 0; | |
325 | uint32_t tu_count, bucket_count, name_count; | |
326 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
327 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
328 | const gdb_byte *name_table_string_offs_reordered; | |
329 | const gdb_byte *name_table_entry_offs_reordered; | |
330 | const gdb_byte *entry_pool; | |
331 | ||
332 | struct index_val | |
333 | { | |
334 | ULONGEST dwarf_tag; | |
335 | struct attr | |
336 | { | |
337 | /* Attribute name DW_IDX_*. */ | |
338 | ULONGEST dw_idx; | |
339 | ||
340 | /* Attribute form DW_FORM_*. */ | |
341 | ULONGEST form; | |
342 | ||
343 | /* Value if FORM is DW_FORM_implicit_const. */ | |
344 | LONGEST implicit_const; | |
345 | }; | |
346 | std::vector<attr> attr_vec; | |
347 | }; | |
348 | ||
349 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
350 | ||
fcf23d5b SM |
351 | const char *namei_to_name |
352 | (uint32_t namei, dwarf2_per_objfile *per_objfile) const; | |
44ed8f3e PA |
353 | |
354 | /* Implementation of the mapped_index_base virtual interface, for | |
355 | the name_components cache. */ | |
356 | ||
fcf23d5b SM |
357 | const char *symbol_name_at |
358 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
359 | { return namei_to_name (idx, per_objfile); } | |
44ed8f3e PA |
360 | |
361 | size_t symbol_name_count () const override | |
362 | { return this->name_count; } | |
927aa2e7 JK |
363 | }; |
364 | ||
cd4fb1b2 | 365 | /* See dwarf2read.h. */ |
ed2dc618 | 366 | |
cd4fb1b2 | 367 | dwarf2_per_objfile * |
ed2dc618 SM |
368 | get_dwarf2_per_objfile (struct objfile *objfile) |
369 | { | |
5bfd760d | 370 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 371 | } |
c906108c | 372 | |
251d32d9 | 373 | /* Default names of the debugging sections. */ |
c906108c | 374 | |
233a11ab CS |
375 | /* Note that if the debugging section has been compressed, it might |
376 | have a name like .zdebug_info. */ | |
377 | ||
9938d15a | 378 | const struct dwarf2_debug_sections dwarf2_elf_names = |
9cdd5dbd | 379 | { |
251d32d9 TG |
380 | { ".debug_info", ".zdebug_info" }, |
381 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
382 | { ".debug_line", ".zdebug_line" }, | |
383 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 384 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 385 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 386 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 387 | { ".debug_str", ".zdebug_str" }, |
18a8505e | 388 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
43988095 | 389 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 390 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 391 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 392 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 393 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
394 | { ".debug_frame", ".zdebug_frame" }, |
395 | { ".eh_frame", NULL }, | |
24d3216f | 396 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
397 | { ".debug_names", ".zdebug_names" }, |
398 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 399 | 23 |
251d32d9 | 400 | }; |
c906108c | 401 | |
80626a55 | 402 | /* List of DWO/DWP sections. */ |
3019eac3 | 403 | |
80626a55 | 404 | static const struct dwop_section_names |
3019eac3 DE |
405 | { |
406 | struct dwarf2_section_names abbrev_dwo; | |
407 | struct dwarf2_section_names info_dwo; | |
408 | struct dwarf2_section_names line_dwo; | |
409 | struct dwarf2_section_names loc_dwo; | |
43988095 | 410 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
411 | struct dwarf2_section_names macinfo_dwo; |
412 | struct dwarf2_section_names macro_dwo; | |
d0ce17d8 | 413 | struct dwarf2_section_names rnglists_dwo; |
3019eac3 DE |
414 | struct dwarf2_section_names str_dwo; |
415 | struct dwarf2_section_names str_offsets_dwo; | |
416 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
417 | struct dwarf2_section_names cu_index; |
418 | struct dwarf2_section_names tu_index; | |
3019eac3 | 419 | } |
80626a55 | 420 | dwop_section_names = |
3019eac3 DE |
421 | { |
422 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
423 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
424 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
425 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 426 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
427 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
428 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
d0ce17d8 | 429 | { ".debug_rnglists.dwo", ".zdebug_rnglists.dwo" }, |
3019eac3 DE |
430 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
431 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
432 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
433 | { ".debug_cu_index", ".zdebug_cu_index" }, |
434 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
435 | }; |
436 | ||
c906108c SS |
437 | /* local data types */ |
438 | ||
d0ce17d8 CT |
439 | /* The location list and range list sections (.debug_loclists & .debug_rnglists) |
440 | begin with a header, which contains the following information. */ | |
441 | struct loclists_rnglists_header | |
41144253 | 442 | { |
443 | /* A 4-byte or 12-byte length containing the length of the | |
444 | set of entries for this compilation unit, not including the | |
445 | length field itself. */ | |
446 | unsigned int length; | |
447 | ||
448 | /* A 2-byte version identifier. */ | |
449 | short version; | |
450 | ||
451 | /* A 1-byte unsigned integer containing the size in bytes of an address on | |
452 | the target system. */ | |
453 | unsigned char addr_size; | |
454 | ||
455 | /* A 1-byte unsigned integer containing the size in bytes of a segment selector | |
456 | on the target system. */ | |
457 | unsigned char segment_collector_size; | |
458 | ||
459 | /* A 4-byte count of the number of offsets that follow the header. */ | |
460 | unsigned int offset_entry_count; | |
461 | }; | |
462 | ||
094b34ac DE |
463 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
464 | This includes type_unit_group and quick_file_names. */ | |
465 | ||
466 | struct stmt_list_hash | |
467 | { | |
468 | /* The DWO unit this table is from or NULL if there is none. */ | |
469 | struct dwo_unit *dwo_unit; | |
470 | ||
471 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 472 | sect_offset line_sect_off; |
094b34ac DE |
473 | }; |
474 | ||
5989a64e | 475 | /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to |
8adb8487 TT |
476 | an object of this type. This contains elements of type unit groups |
477 | that can be shared across objfiles. The non-shareable parts are in | |
478 | type_unit_group_unshareable. */ | |
f4dc4d17 | 479 | |
0d305d5c | 480 | struct type_unit_group : public dwarf2_per_cu_data |
f4dc4d17 | 481 | { |
0186c6a7 DE |
482 | /* The TUs that share this DW_AT_stmt_list entry. |
483 | This is added to while parsing type units to build partial symtabs, | |
484 | and is deleted afterwards and not used again. */ | |
0d305d5c | 485 | std::vector<signatured_type *> *tus = nullptr; |
f4dc4d17 | 486 | |
094b34ac | 487 | /* The data used to construct the hash key. */ |
0d305d5c | 488 | struct stmt_list_hash hash {}; |
f4dc4d17 DE |
489 | }; |
490 | ||
73869dc2 | 491 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
492 | |
493 | struct dwo_sections | |
494 | { | |
495 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
496 | struct dwarf2_section_info line; |
497 | struct dwarf2_section_info loc; | |
43988095 | 498 | struct dwarf2_section_info loclists; |
09262596 DE |
499 | struct dwarf2_section_info macinfo; |
500 | struct dwarf2_section_info macro; | |
d0ce17d8 | 501 | struct dwarf2_section_info rnglists; |
3019eac3 DE |
502 | struct dwarf2_section_info str; |
503 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
504 | /* In the case of a virtual DWO file, these two are unused. */ |
505 | struct dwarf2_section_info info; | |
fd5866f6 | 506 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
507 | }; |
508 | ||
c88ee1f0 | 509 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
510 | |
511 | struct dwo_unit | |
512 | { | |
513 | /* Backlink to the containing struct dwo_file. */ | |
514 | struct dwo_file *dwo_file; | |
515 | ||
516 | /* The "id" that distinguishes this CU/TU. | |
517 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
518 | Since signatures came first, we stick with it for consistency. */ | |
519 | ULONGEST signature; | |
520 | ||
521 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 522 | struct dwarf2_section_info *section; |
3019eac3 | 523 | |
9c541725 PA |
524 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
525 | sect_offset sect_off; | |
3019eac3 DE |
526 | unsigned int length; |
527 | ||
528 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
529 | cu_offset type_offset_in_tu; | |
530 | }; | |
531 | ||
73869dc2 DE |
532 | /* include/dwarf2.h defines the DWP section codes. |
533 | It defines a max value but it doesn't define a min value, which we | |
534 | use for error checking, so provide one. */ | |
535 | ||
536 | enum dwp_v2_section_ids | |
537 | { | |
538 | DW_SECT_MIN = 1 | |
539 | }; | |
540 | ||
80626a55 | 541 | /* Data for one DWO file. |
57d63ce2 DE |
542 | |
543 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
544 | appears in a DWP file). DWP files don't really have DWO files per se - | |
545 | comdat folding of types "loses" the DWO file they came from, and from | |
546 | a high level view DWP files appear to contain a mass of random types. | |
547 | However, to maintain consistency with the non-DWP case we pretend DWP | |
548 | files contain virtual DWO files, and we assign each TU with one virtual | |
549 | DWO file (generally based on the line and abbrev section offsets - | |
550 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
551 | |
552 | struct dwo_file | |
553 | { | |
51ac9db5 SM |
554 | dwo_file () = default; |
555 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
556 | ||
18a8505e | 557 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
80626a55 DE |
558 | For virtual DWO files the name is constructed from the section offsets |
559 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
560 | from related CU+TUs. */ | |
51ac9db5 | 561 | const char *dwo_name = nullptr; |
0ac5b59e DE |
562 | |
563 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 564 | const char *comp_dir = nullptr; |
3019eac3 | 565 | |
80626a55 DE |
566 | /* The bfd, when the file is open. Otherwise this is NULL. |
567 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 568 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 569 | |
73869dc2 | 570 | /* The sections that make up this DWO file. |
d2854d8d | 571 | Remember that for virtual DWO files in DWP V2 or DWP V5, these are virtual |
73869dc2 | 572 | sections (for lack of a better name). */ |
51ac9db5 | 573 | struct dwo_sections sections {}; |
3019eac3 | 574 | |
33c5cd75 DB |
575 | /* The CUs in the file. |
576 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
577 | an extension to handle LLVM's Link Time Optimization output (where | |
578 | multiple source files may be compiled into a single object/dwo pair). */ | |
b0b6a987 | 579 | htab_up cus; |
3019eac3 DE |
580 | |
581 | /* Table of TUs in the file. | |
582 | Each element is a struct dwo_unit. */ | |
b0b6a987 | 583 | htab_up tus; |
3019eac3 DE |
584 | }; |
585 | ||
80626a55 DE |
586 | /* These sections are what may appear in a DWP file. */ |
587 | ||
588 | struct dwp_sections | |
589 | { | |
d2854d8d | 590 | /* These are used by all DWP versions (1, 2 and 5). */ |
80626a55 DE |
591 | struct dwarf2_section_info str; |
592 | struct dwarf2_section_info cu_index; | |
593 | struct dwarf2_section_info tu_index; | |
73869dc2 | 594 | |
d2854d8d | 595 | /* These are only used by DWP version 2 and version 5 files. |
73869dc2 DE |
596 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other |
597 | sections are referenced by section number, and are not recorded here. | |
d2854d8d CT |
598 | In DWP version 2 or 5 there is at most one copy of all these sections, |
599 | each section being (effectively) comprised of the concatenation of all of | |
600 | the individual sections that exist in the version 1 format. | |
73869dc2 DE |
601 | To keep the code simple we treat each of these concatenated pieces as a |
602 | section itself (a virtual section?). */ | |
603 | struct dwarf2_section_info abbrev; | |
604 | struct dwarf2_section_info info; | |
605 | struct dwarf2_section_info line; | |
606 | struct dwarf2_section_info loc; | |
d2854d8d | 607 | struct dwarf2_section_info loclists; |
73869dc2 DE |
608 | struct dwarf2_section_info macinfo; |
609 | struct dwarf2_section_info macro; | |
d2854d8d | 610 | struct dwarf2_section_info rnglists; |
73869dc2 DE |
611 | struct dwarf2_section_info str_offsets; |
612 | struct dwarf2_section_info types; | |
80626a55 DE |
613 | }; |
614 | ||
73869dc2 DE |
615 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
616 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 617 | |
73869dc2 | 618 | struct virtual_v1_dwo_sections |
80626a55 DE |
619 | { |
620 | struct dwarf2_section_info abbrev; | |
621 | struct dwarf2_section_info line; | |
622 | struct dwarf2_section_info loc; | |
623 | struct dwarf2_section_info macinfo; | |
624 | struct dwarf2_section_info macro; | |
625 | struct dwarf2_section_info str_offsets; | |
626 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 627 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
628 | struct dwarf2_section_info info_or_types; |
629 | }; | |
630 | ||
d2854d8d | 631 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2 or 5. |
73869dc2 DE |
632 | In version 2, the sections of the DWO files are concatenated together |
633 | and stored in one section of that name. Thus each ELF section contains | |
634 | several "virtual" sections. */ | |
635 | ||
d2854d8d | 636 | struct virtual_v2_or_v5_dwo_sections |
73869dc2 DE |
637 | { |
638 | bfd_size_type abbrev_offset; | |
639 | bfd_size_type abbrev_size; | |
640 | ||
641 | bfd_size_type line_offset; | |
642 | bfd_size_type line_size; | |
643 | ||
644 | bfd_size_type loc_offset; | |
645 | bfd_size_type loc_size; | |
646 | ||
d2854d8d CT |
647 | bfd_size_type loclists_offset; |
648 | bfd_size_type loclists_size; | |
649 | ||
73869dc2 DE |
650 | bfd_size_type macinfo_offset; |
651 | bfd_size_type macinfo_size; | |
652 | ||
653 | bfd_size_type macro_offset; | |
654 | bfd_size_type macro_size; | |
655 | ||
d2854d8d CT |
656 | bfd_size_type rnglists_offset; |
657 | bfd_size_type rnglists_size; | |
658 | ||
73869dc2 DE |
659 | bfd_size_type str_offsets_offset; |
660 | bfd_size_type str_offsets_size; | |
661 | ||
662 | /* Each DWP hash table entry records one CU or one TU. | |
663 | That is recorded here, and copied to dwo_unit.section. */ | |
664 | bfd_size_type info_or_types_offset; | |
665 | bfd_size_type info_or_types_size; | |
666 | }; | |
667 | ||
80626a55 DE |
668 | /* Contents of DWP hash tables. */ |
669 | ||
670 | struct dwp_hash_table | |
671 | { | |
73869dc2 | 672 | uint32_t version, nr_columns; |
80626a55 | 673 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
674 | const gdb_byte *hash_table, *unit_table; |
675 | union | |
676 | { | |
677 | struct | |
678 | { | |
679 | const gdb_byte *indices; | |
680 | } v1; | |
681 | struct | |
682 | { | |
683 | /* This is indexed by column number and gives the id of the section | |
684 | in that column. */ | |
685 | #define MAX_NR_V2_DWO_SECTIONS \ | |
686 | (1 /* .debug_info or .debug_types */ \ | |
687 | + 1 /* .debug_abbrev */ \ | |
688 | + 1 /* .debug_line */ \ | |
689 | + 1 /* .debug_loc */ \ | |
690 | + 1 /* .debug_str_offsets */ \ | |
691 | + 1 /* .debug_macro or .debug_macinfo */) | |
692 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
693 | const gdb_byte *offsets; | |
694 | const gdb_byte *sizes; | |
695 | } v2; | |
d2854d8d CT |
696 | struct |
697 | { | |
698 | /* This is indexed by column number and gives the id of the section | |
699 | in that column. */ | |
700 | #define MAX_NR_V5_DWO_SECTIONS \ | |
701 | (1 /* .debug_info */ \ | |
702 | + 1 /* .debug_abbrev */ \ | |
703 | + 1 /* .debug_line */ \ | |
704 | + 1 /* .debug_loclists */ \ | |
705 | + 1 /* .debug_str_offsets */ \ | |
706 | + 1 /* .debug_macro */ \ | |
707 | + 1 /* .debug_rnglists */) | |
708 | int section_ids[MAX_NR_V5_DWO_SECTIONS]; | |
709 | const gdb_byte *offsets; | |
710 | const gdb_byte *sizes; | |
711 | } v5; | |
73869dc2 | 712 | } section_pool; |
80626a55 DE |
713 | }; |
714 | ||
715 | /* Data for one DWP file. */ | |
716 | ||
717 | struct dwp_file | |
718 | { | |
400174b1 TT |
719 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
720 | : name (name_), | |
721 | dbfd (std::move (abfd)) | |
722 | { | |
723 | } | |
724 | ||
80626a55 DE |
725 | /* Name of the file. */ |
726 | const char *name; | |
727 | ||
73869dc2 | 728 | /* File format version. */ |
400174b1 | 729 | int version = 0; |
73869dc2 | 730 | |
93417882 | 731 | /* The bfd. */ |
400174b1 | 732 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
733 | |
734 | /* Section info for this file. */ | |
400174b1 | 735 | struct dwp_sections sections {}; |
80626a55 | 736 | |
57d63ce2 | 737 | /* Table of CUs in the file. */ |
400174b1 | 738 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
739 | |
740 | /* Table of TUs in the file. */ | |
400174b1 | 741 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 742 | |
19ac8c2e | 743 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
48b490f2 TT |
744 | htab_up loaded_cus; |
745 | htab_up loaded_tus; | |
80626a55 | 746 | |
73869dc2 DE |
747 | /* Table to map ELF section numbers to their sections. |
748 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
749 | unsigned int num_sections = 0; |
750 | asection **elf_sections = nullptr; | |
80626a55 DE |
751 | }; |
752 | ||
0963b4bd MS |
753 | /* Struct used to pass misc. parameters to read_die_and_children, et |
754 | al. which are used for both .debug_info and .debug_types dies. | |
755 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 756 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
757 | |
758 | struct die_reader_specs | |
759 | { | |
a32a8923 | 760 | /* The bfd of die_section. */ |
0280fdcc | 761 | bfd *abfd; |
93311388 DE |
762 | |
763 | /* The CU of the DIE we are parsing. */ | |
764 | struct dwarf2_cu *cu; | |
765 | ||
80626a55 | 766 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
767 | struct dwo_file *dwo_file; |
768 | ||
dee91e82 | 769 | /* The section the die comes from. |
3019eac3 | 770 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
771 | struct dwarf2_section_info *die_section; |
772 | ||
773 | /* die_section->buffer. */ | |
d521ce57 | 774 | const gdb_byte *buffer; |
f664829e DE |
775 | |
776 | /* The end of the buffer. */ | |
777 | const gdb_byte *buffer_end; | |
a2ce51a0 | 778 | |
685af9cd TT |
779 | /* The abbreviation table to use when reading the DIEs. */ |
780 | struct abbrev_table *abbrev_table; | |
93311388 DE |
781 | }; |
782 | ||
c0ab21c2 TT |
783 | /* A subclass of die_reader_specs that holds storage and has complex |
784 | constructor and destructor behavior. */ | |
785 | ||
786 | class cutu_reader : public die_reader_specs | |
787 | { | |
788 | public: | |
789 | ||
ab432490 SM |
790 | cutu_reader (dwarf2_per_cu_data *this_cu, |
791 | dwarf2_per_objfile *per_objfile, | |
c0ab21c2 | 792 | struct abbrev_table *abbrev_table, |
2e671100 | 793 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
794 | bool skip_partial); |
795 | ||
796 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
ab432490 | 797 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 TT |
798 | struct dwarf2_cu *parent_cu = nullptr, |
799 | struct dwo_file *dwo_file = nullptr); | |
800 | ||
c0ab21c2 TT |
801 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
802 | ||
803 | const gdb_byte *info_ptr = nullptr; | |
804 | struct die_info *comp_unit_die = nullptr; | |
c0ab21c2 TT |
805 | bool dummy_p = false; |
806 | ||
6751ebae TT |
807 | /* Release the new CU, putting it on the chain. This cannot be done |
808 | for dummy CUs. */ | |
809 | void keep (); | |
810 | ||
c0ab21c2 | 811 | private: |
9e021579 SM |
812 | void init_tu_and_read_dwo_dies (dwarf2_per_cu_data *this_cu, |
813 | dwarf2_per_objfile *per_objfile, | |
2e671100 | 814 | dwarf2_cu *existing_cu); |
c0ab21c2 TT |
815 | |
816 | struct dwarf2_per_cu_data *m_this_cu; | |
c0ab21c2 TT |
817 | std::unique_ptr<dwarf2_cu> m_new_cu; |
818 | ||
819 | /* The ordinary abbreviation table. */ | |
820 | abbrev_table_up m_abbrev_table_holder; | |
821 | ||
822 | /* The DWO abbreviation table. */ | |
823 | abbrev_table_up m_dwo_abbrev_table; | |
824 | }; | |
dee91e82 | 825 | |
c906108c | 826 | /* When we construct a partial symbol table entry we only |
0963b4bd | 827 | need this much information. */ |
6f06d47b | 828 | struct partial_die_info : public allocate_on_obstack |
c906108c | 829 | { |
7c32eebb | 830 | partial_die_info (sect_offset sect_off, const struct abbrev_info *abbrev); |
6f06d47b YQ |
831 | |
832 | /* Disable assign but still keep copy ctor, which is needed | |
833 | load_partial_dies. */ | |
834 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
835 | ||
52356b79 YQ |
836 | /* Adjust the partial die before generating a symbol for it. This |
837 | function may set the is_external flag or change the DIE's | |
838 | name. */ | |
839 | void fixup (struct dwarf2_cu *cu); | |
840 | ||
48fbe735 YQ |
841 | /* Read a minimal amount of information into the minimal die |
842 | structure. */ | |
843 | const gdb_byte *read (const struct die_reader_specs *reader, | |
844 | const struct abbrev_info &abbrev, | |
845 | const gdb_byte *info_ptr); | |
846 | ||
7d00ffec TT |
847 | /* Compute the name of this partial DIE. This memoizes the |
848 | result, so it is safe to call multiple times. */ | |
849 | const char *name (dwarf2_cu *cu); | |
850 | ||
72bf9492 | 851 | /* Offset of this DIE. */ |
6f06d47b | 852 | const sect_offset sect_off; |
72bf9492 DJ |
853 | |
854 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 855 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 856 | |
72bf9492 | 857 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
858 | const unsigned int has_children : 1; |
859 | ||
72bf9492 DJ |
860 | unsigned int is_external : 1; |
861 | unsigned int is_declaration : 1; | |
862 | unsigned int has_type : 1; | |
863 | unsigned int has_specification : 1; | |
864 | unsigned int has_pc_info : 1; | |
481860b3 | 865 | unsigned int may_be_inlined : 1; |
72bf9492 | 866 | |
0c1b455e TT |
867 | /* This DIE has been marked DW_AT_main_subprogram. */ |
868 | unsigned int main_subprogram : 1; | |
869 | ||
72bf9492 DJ |
870 | /* Flag set if the SCOPE field of this structure has been |
871 | computed. */ | |
872 | unsigned int scope_set : 1; | |
873 | ||
fa4028e9 JB |
874 | /* Flag set if the DIE has a byte_size attribute. */ |
875 | unsigned int has_byte_size : 1; | |
876 | ||
ff908ebf AW |
877 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
878 | unsigned int has_const_value : 1; | |
879 | ||
98bfdba5 PA |
880 | /* Flag set if any of the DIE's children are template arguments. */ |
881 | unsigned int has_template_arguments : 1; | |
882 | ||
52356b79 | 883 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
884 | unsigned int fixup_called : 1; |
885 | ||
36586728 TT |
886 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
887 | unsigned int is_dwz : 1; | |
888 | ||
889 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
890 | unsigned int spec_is_dwz : 1; | |
891 | ||
7d00ffec TT |
892 | unsigned int canonical_name : 1; |
893 | ||
72bf9492 | 894 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 895 | sometimes a default name for unnamed DIEs. */ |
7d00ffec | 896 | const char *raw_name = nullptr; |
72bf9492 | 897 | |
abc72ce4 | 898 | /* The linkage name, if present. */ |
6f06d47b | 899 | const char *linkage_name = nullptr; |
abc72ce4 | 900 | |
72bf9492 DJ |
901 | /* The scope to prepend to our children. This is generally |
902 | allocated on the comp_unit_obstack, so will disappear | |
903 | when this compilation unit leaves the cache. */ | |
6f06d47b | 904 | const char *scope = nullptr; |
72bf9492 | 905 | |
95554aad TT |
906 | /* Some data associated with the partial DIE. The tag determines |
907 | which field is live. */ | |
908 | union | |
909 | { | |
910 | /* The location description associated with this DIE, if any. */ | |
911 | struct dwarf_block *locdesc; | |
912 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 913 | sect_offset sect_off; |
6f06d47b | 914 | } d {}; |
72bf9492 DJ |
915 | |
916 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
917 | CORE_ADDR lowpc = 0; |
918 | CORE_ADDR highpc = 0; | |
72bf9492 | 919 | |
93311388 | 920 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 921 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
922 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
923 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 924 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
925 | |
926 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
927 | DW_AT_specification (or DW_AT_abstract_origin or | |
928 | DW_AT_extension). */ | |
6f06d47b | 929 | sect_offset spec_offset {}; |
72bf9492 DJ |
930 | |
931 | /* Pointers to this DIE's parent, first child, and next sibling, | |
932 | if any. */ | |
6f06d47b YQ |
933 | struct partial_die_info *die_parent = nullptr; |
934 | struct partial_die_info *die_child = nullptr; | |
935 | struct partial_die_info *die_sibling = nullptr; | |
936 | ||
937 | friend struct partial_die_info * | |
938 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
939 | ||
940 | private: | |
941 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
942 | partial_die_info (sect_offset sect_off) | |
943 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
944 | { | |
945 | } | |
946 | ||
947 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
948 | int has_children_) | |
949 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
950 | { | |
951 | is_external = 0; | |
952 | is_declaration = 0; | |
953 | has_type = 0; | |
954 | has_specification = 0; | |
955 | has_pc_info = 0; | |
956 | may_be_inlined = 0; | |
957 | main_subprogram = 0; | |
958 | scope_set = 0; | |
959 | has_byte_size = 0; | |
960 | has_const_value = 0; | |
961 | has_template_arguments = 0; | |
962 | fixup_called = 0; | |
963 | is_dwz = 0; | |
964 | spec_is_dwz = 0; | |
7d00ffec | 965 | canonical_name = 0; |
6f06d47b | 966 | } |
c906108c SS |
967 | }; |
968 | ||
c906108c SS |
969 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
970 | but this would require a corresponding change in unpack_field_as_long | |
971 | and friends. */ | |
972 | static int bits_per_byte = 8; | |
973 | ||
9c6a1327 TT |
974 | struct variant_part_builder; |
975 | ||
976 | /* When reading a variant, we track a bit more information about the | |
977 | field, and store it in an object of this type. */ | |
2ddeaf8a TT |
978 | |
979 | struct variant_field | |
980 | { | |
9c6a1327 TT |
981 | int first_field = -1; |
982 | int last_field = -1; | |
983 | ||
984 | /* A variant can contain other variant parts. */ | |
985 | std::vector<variant_part_builder> variant_parts; | |
986 | ||
2ddeaf8a TT |
987 | /* If we see a DW_TAG_variant, then this will be set if this is the |
988 | default branch. */ | |
9c6a1327 TT |
989 | bool default_branch = false; |
990 | /* If we see a DW_AT_discr_value, then this will be the discriminant | |
991 | value. */ | |
992 | ULONGEST discriminant_value = 0; | |
993 | /* If we see a DW_AT_discr_list, then this is a pointer to the list | |
994 | data. */ | |
995 | struct dwarf_block *discr_list_data = nullptr; | |
996 | }; | |
997 | ||
998 | /* This represents a DW_TAG_variant_part. */ | |
999 | ||
1000 | struct variant_part_builder | |
1001 | { | |
1002 | /* The offset of the discriminant field. */ | |
1003 | sect_offset discriminant_offset {}; | |
1004 | ||
1005 | /* Variants that are direct children of this variant part. */ | |
1006 | std::vector<variant_field> variants; | |
1007 | ||
1008 | /* True if we're currently reading a variant. */ | |
1009 | bool processing_variant = false; | |
2ddeaf8a TT |
1010 | }; |
1011 | ||
52059ffd TT |
1012 | struct nextfield |
1013 | { | |
be2daae6 TT |
1014 | int accessibility = 0; |
1015 | int virtuality = 0; | |
9c6a1327 TT |
1016 | /* Variant parts need to find the discriminant, which is a DIE |
1017 | reference. We track the section offset of each field to make | |
1018 | this link. */ | |
1019 | sect_offset offset; | |
be2daae6 | 1020 | struct field field {}; |
52059ffd TT |
1021 | }; |
1022 | ||
1023 | struct fnfieldlist | |
1024 | { | |
be2daae6 TT |
1025 | const char *name = nullptr; |
1026 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1027 | }; |
1028 | ||
c906108c SS |
1029 | /* The routines that read and process dies for a C struct or C++ class |
1030 | pass lists of data member fields and lists of member function fields | |
1031 | in an instance of a field_info structure, as defined below. */ | |
1032 | struct field_info | |
2de01bdb SM |
1033 | { |
1034 | /* List of data member and baseclasses fields. */ | |
1035 | std::vector<struct nextfield> fields; | |
1036 | std::vector<struct nextfield> baseclasses; | |
1037 | ||
1038 | /* Set if the accessibility of one of the fields is not public. */ | |
264fc0e2 | 1039 | bool non_public_fields = false; |
2de01bdb SM |
1040 | |
1041 | /* Member function fieldlist array, contains name of possibly overloaded | |
1042 | member function, number of overloaded member functions and a pointer | |
1043 | to the head of the member function field chain. */ | |
1044 | std::vector<struct fnfieldlist> fnfieldlists; | |
1045 | ||
1046 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1047 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1048 | std::vector<struct decl_field> typedef_field_list; | |
1049 | ||
1050 | /* Nested types defined by this class and the number of elements in this | |
1051 | list. */ | |
1052 | std::vector<struct decl_field> nested_types_list; | |
1053 | ||
1054 | /* If non-null, this is the variant part we are currently | |
1055 | reading. */ | |
1056 | variant_part_builder *current_variant_part = nullptr; | |
1057 | /* This holds all the top-level variant parts attached to the type | |
1058 | we're reading. */ | |
1059 | std::vector<variant_part_builder> variant_parts; | |
1060 | ||
1061 | /* Return the total number of fields (including baseclasses). */ | |
1062 | int nfields () const | |
c5aa993b | 1063 | { |
2de01bdb SM |
1064 | return fields.size () + baseclasses.size (); |
1065 | } | |
1066 | }; | |
c906108c | 1067 | |
ae038cb0 DJ |
1068 | /* Loaded secondary compilation units are kept in memory until they |
1069 | have not been referenced for the processing of this many | |
1070 | compilation units. Set this to zero to disable caching. Cache | |
1071 | sizes of up to at least twenty will improve startup time for | |
1072 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1073 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1074 | static void |
b4f54984 DE |
1075 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1076 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1077 | { |
3e43a32a | 1078 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1079 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1080 | value); |
1081 | } | |
4390d890 | 1082 | \f |
c906108c SS |
1083 | /* local function prototypes */ |
1084 | ||
918dd910 JK |
1085 | static void dwarf2_find_base_address (struct die_info *die, |
1086 | struct dwarf2_cu *cu); | |
1087 | ||
891813be | 1088 | static dwarf2_psymtab *create_partial_symtab |
7aa104c4 SM |
1089 | (dwarf2_per_cu_data *per_cu, dwarf2_per_objfile *per_objfile, |
1090 | const char *name); | |
0018ea6f | 1091 | |
f1902523 JK |
1092 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1093 | const gdb_byte *info_ptr, | |
3e225074 | 1094 | struct die_info *type_unit_die); |
f1902523 | 1095 | |
976ca316 | 1096 | static void dwarf2_build_psymtabs_hard (dwarf2_per_objfile *per_objfile); |
c906108c | 1097 | |
72bf9492 DJ |
1098 | static void scan_partial_symbols (struct partial_die_info *, |
1099 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1100 | int, struct dwarf2_cu *); |
c906108c | 1101 | |
72bf9492 DJ |
1102 | static void add_partial_symbol (struct partial_die_info *, |
1103 | struct dwarf2_cu *); | |
63d06c5c | 1104 | |
72bf9492 DJ |
1105 | static void add_partial_namespace (struct partial_die_info *pdi, |
1106 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1107 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1108 | |
5d7cb8df | 1109 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1110 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1111 | struct dwarf2_cu *cu); |
1112 | ||
72bf9492 DJ |
1113 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1114 | struct dwarf2_cu *cu); | |
91c24f0a | 1115 | |
bc30ff58 JB |
1116 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1117 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1118 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1119 | |
d521ce57 | 1120 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1121 | |
dee91e82 | 1122 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1123 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1124 | |
fb816e8b TV |
1125 | /* A pair of partial_die_info and compilation unit. */ |
1126 | struct cu_partial_die_info | |
1127 | { | |
1128 | /* The compilation unit of the partial_die_info. */ | |
1129 | struct dwarf2_cu *cu; | |
1130 | /* A partial_die_info. */ | |
1131 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1132 | |
1133 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1134 | : cu (cu), | |
1135 | pdi (pdi) | |
405feb71 | 1136 | { /* Nothing. */ } |
122cf0f2 AB |
1137 | |
1138 | private: | |
1139 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1140 | }; |
1141 | ||
122cf0f2 AB |
1142 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1143 | struct dwarf2_cu *); | |
72bf9492 | 1144 | |
d521ce57 | 1145 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
4444f407 TT |
1146 | struct attribute *, |
1147 | const struct attr_abbrev *, | |
7a5f294d | 1148 | const gdb_byte *); |
18a8505e AT |
1149 | |
1150 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
d0ce17d8 | 1151 | struct attribute *attr, dwarf_tag tag); |
18a8505e AT |
1152 | |
1153 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1154 | |
976ca316 SM |
1155 | static sect_offset read_abbrev_offset (dwarf2_per_objfile *per_objfile, |
1156 | dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1157 | |
ed2dc618 | 1158 | static const char *read_indirect_string |
976ca316 | 1159 | (dwarf2_per_objfile *per_objfile, bfd *, const gdb_byte *, |
ed2dc618 | 1160 | const struct comp_unit_head *, unsigned int *); |
4bdf3d34 | 1161 | |
ed2dc618 | 1162 | static const char *read_indirect_string_at_offset |
976ca316 | 1163 | (dwarf2_per_objfile *per_objfile, LONGEST str_offset); |
927aa2e7 | 1164 | |
d521ce57 TT |
1165 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1166 | const gdb_byte *, | |
3019eac3 DE |
1167 | unsigned int *); |
1168 | ||
18a8505e AT |
1169 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1170 | ULONGEST str_index); | |
1171 | ||
1172 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1173 | ULONGEST str_index); | |
3019eac3 | 1174 | |
e142c38c | 1175 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1176 | |
e142c38c DJ |
1177 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1178 | struct dwarf2_cu *); | |
c906108c | 1179 | |
7d45c7c3 | 1180 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
dda83cd7 | 1181 | struct dwarf2_cu *cu); |
7d45c7c3 | 1182 | |
a084a2a6 AT |
1183 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1184 | ||
05cf31d1 | 1185 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
dda83cd7 | 1186 | struct dwarf2_cu *cu); |
05cf31d1 | 1187 | |
e142c38c | 1188 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1189 | |
e142c38c | 1190 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1191 | struct dwarf2_cu **); |
63d06c5c | 1192 | |
9c541725 | 1193 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1194 | struct dwarf2_cu *cu); |
debd256d | 1195 | |
f3f5162e | 1196 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1197 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1198 | CORE_ADDR, int decode_mapping); |
c906108c | 1199 | |
804d2729 TT |
1200 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1201 | const char *); | |
c906108c | 1202 | |
a14ed312 | 1203 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1204 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1205 | |
ff39bb5e | 1206 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1207 | struct dwarf2_cu *); |
c906108c | 1208 | |
ff39bb5e | 1209 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1210 | struct type *type, |
1211 | const char *name, | |
1212 | struct obstack *obstack, | |
12df843f | 1213 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1214 | const gdb_byte **bytes, |
98bfdba5 | 1215 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1216 | |
57567375 TT |
1217 | static struct type *read_subrange_index_type (struct die_info *die, |
1218 | struct dwarf2_cu *cu); | |
1219 | ||
e7c27a73 | 1220 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1221 | |
b4ba55a1 JB |
1222 | static int need_gnat_info (struct dwarf2_cu *); |
1223 | ||
3e43a32a MS |
1224 | static struct type *die_descriptive_type (struct die_info *, |
1225 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1226 | |
1227 | static void set_descriptive_type (struct type *, struct die_info *, | |
1228 | struct dwarf2_cu *); | |
1229 | ||
e7c27a73 DJ |
1230 | static struct type *die_containing_type (struct die_info *, |
1231 | struct dwarf2_cu *); | |
c906108c | 1232 | |
ff39bb5e | 1233 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1234 | struct dwarf2_cu *); |
c906108c | 1235 | |
f792889a | 1236 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1237 | |
673bfd45 DE |
1238 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1239 | ||
0d5cff50 | 1240 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1241 | |
6e70227d | 1242 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1243 | const char *suffix, int physname, |
1244 | struct dwarf2_cu *cu); | |
63d06c5c | 1245 | |
e7c27a73 | 1246 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1247 | |
348e048f DE |
1248 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1249 | ||
e7c27a73 | 1250 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1251 | |
e7c27a73 | 1252 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1253 | |
96408a79 SA |
1254 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1255 | ||
71a3c369 TT |
1256 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1257 | ||
41144253 | 1258 | /* Return the .debug_loclists section to use for cu. */ |
1259 | static struct dwarf2_section_info *cu_debug_loc_section (struct dwarf2_cu *cu); | |
1260 | ||
d0ce17d8 CT |
1261 | /* Return the .debug_rnglists section to use for cu. */ |
1262 | static struct dwarf2_section_info *cu_debug_rnglists_section | |
1263 | (struct dwarf2_cu *cu, dwarf_tag tag); | |
1264 | ||
3a2b436a | 1265 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1266 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1267 | enum pc_bounds_kind |
1268 | { | |
e385593e | 1269 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1270 | PC_BOUNDS_NOT_PRESENT, |
1271 | ||
e385593e JK |
1272 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1273 | were present but they do not form a valid range of PC addresses. */ | |
1274 | PC_BOUNDS_INVALID, | |
1275 | ||
3a2b436a JK |
1276 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1277 | PC_BOUNDS_RANGES, | |
1278 | ||
1279 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1280 | PC_BOUNDS_HIGH_LOW, | |
1281 | }; | |
1282 | ||
1283 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1284 | CORE_ADDR *, CORE_ADDR *, | |
1285 | struct dwarf2_cu *, | |
891813be | 1286 | dwarf2_psymtab *); |
c906108c | 1287 | |
fae299cd DC |
1288 | static void get_scope_pc_bounds (struct die_info *, |
1289 | CORE_ADDR *, CORE_ADDR *, | |
1290 | struct dwarf2_cu *); | |
1291 | ||
801e3a5b | 1292 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
dda83cd7 | 1293 | CORE_ADDR, struct dwarf2_cu *); |
801e3a5b | 1294 | |
a14ed312 | 1295 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1296 | struct dwarf2_cu *); |
c906108c | 1297 | |
a14ed312 | 1298 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1299 | struct type *, struct dwarf2_cu *); |
c906108c | 1300 | |
a14ed312 | 1301 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1302 | struct die_info *, struct type *, |
e7c27a73 | 1303 | struct dwarf2_cu *); |
c906108c | 1304 | |
a14ed312 | 1305 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1306 | struct type *, |
1307 | struct dwarf2_cu *); | |
c906108c | 1308 | |
134d01f1 | 1309 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1310 | |
e7c27a73 | 1311 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1312 | |
e7c27a73 | 1313 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1314 | |
5d7cb8df JK |
1315 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1316 | ||
804d2729 | 1317 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1318 | |
27aa8d6a SW |
1319 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1320 | ||
74921315 KS |
1321 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1322 | ||
f55ee35c JK |
1323 | static struct type *read_module_type (struct die_info *die, |
1324 | struct dwarf2_cu *cu); | |
1325 | ||
38d518c9 | 1326 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1327 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1328 | |
134d01f1 | 1329 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1330 | |
7d79de9a TT |
1331 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *, |
1332 | bool * = nullptr); | |
c906108c | 1333 | |
6e70227d | 1334 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1335 | struct dwarf2_cu *); |
1336 | ||
bf6af496 | 1337 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1338 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1339 | struct die_info *); |
639d11d3 | 1340 | |
dee91e82 | 1341 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1342 | const gdb_byte *info_ptr, |
1343 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1344 | struct die_info *parent); |
1345 | ||
d521ce57 TT |
1346 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1347 | struct die_info **, const gdb_byte *, | |
3e225074 | 1348 | int); |
3019eac3 | 1349 | |
d521ce57 | 1350 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1351 | struct die_info **, const gdb_byte *); |
93311388 | 1352 | |
e7c27a73 | 1353 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1354 | |
15d034d0 | 1355 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
be1e3d3e | 1356 | struct objfile *); |
71c25dea | 1357 | |
15d034d0 | 1358 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1359 | |
15d034d0 | 1360 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1361 | struct die_info *die, |
1362 | struct dwarf2_cu *cu); | |
1363 | ||
ca69b9e6 DE |
1364 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1365 | struct dwarf2_cu *cu); | |
1366 | ||
e142c38c | 1367 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1368 | struct dwarf2_cu **); |
9219021c | 1369 | |
d97bc12b DE |
1370 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1371 | ||
1372 | static void dump_die_for_error (struct die_info *); | |
1373 | ||
1374 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1375 | struct die_info *); | |
c906108c | 1376 | |
d97bc12b | 1377 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1378 | |
51545339 | 1379 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1380 | struct dwarf2_cu *); |
c906108c | 1381 | |
348e048f | 1382 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1383 | const struct attribute *, |
348e048f DE |
1384 | struct dwarf2_cu **); |
1385 | ||
10b3939b | 1386 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1387 | const struct attribute *, |
f2f0e013 | 1388 | struct dwarf2_cu **); |
c906108c | 1389 | |
348e048f | 1390 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1391 | const struct attribute *, |
348e048f DE |
1392 | struct dwarf2_cu **); |
1393 | ||
ac9ec31b DE |
1394 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1395 | struct dwarf2_cu *); | |
1396 | ||
1397 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1398 | const struct attribute *, |
ac9ec31b DE |
1399 | struct dwarf2_cu *); |
1400 | ||
ab432490 SM |
1401 | static void load_full_type_unit (dwarf2_per_cu_data *per_cu, |
1402 | dwarf2_per_objfile *per_objfile); | |
348e048f | 1403 | |
ab432490 SM |
1404 | static void read_signatured_type (signatured_type *sig_type, |
1405 | dwarf2_per_objfile *per_objfile); | |
348e048f | 1406 | |
63e43d3a PMR |
1407 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1408 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1409 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1410 | |
c906108c SS |
1411 | /* memory allocation interface */ |
1412 | ||
7b5a2f43 | 1413 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1414 | |
b60c80d6 | 1415 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1416 | |
43f3e411 | 1417 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1418 | |
8cf6f0b1 TT |
1419 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1420 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1421 | const struct attribute *attr); |
8cf6f0b1 | 1422 | |
ff39bb5e | 1423 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1424 | struct symbol *sym, |
f1e6e072 TT |
1425 | struct dwarf2_cu *cu, |
1426 | int is_block); | |
4c2df51b | 1427 | |
d521ce57 TT |
1428 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1429 | const gdb_byte *info_ptr, | |
7c32eebb | 1430 | const struct abbrev_info *abbrev); |
4bb7a0a7 | 1431 | |
72bf9492 DJ |
1432 | static hashval_t partial_die_hash (const void *item); |
1433 | ||
1434 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1435 | ||
ae038cb0 | 1436 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 | 1437 | (sect_offset sect_off, unsigned int offset_in_dwz, |
976ca316 | 1438 | dwarf2_per_objfile *per_objfile); |
ae038cb0 | 1439 | |
9816fde3 | 1440 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1441 | struct die_info *comp_unit_die, |
1442 | enum language pretend_language); | |
93311388 | 1443 | |
f792889a | 1444 | static struct type *set_die_type (struct die_info *, struct type *, |
57567375 | 1445 | struct dwarf2_cu *, bool = false); |
1c379e20 | 1446 | |
976ca316 | 1447 | static void create_all_comp_units (dwarf2_per_objfile *per_objfile); |
ae038cb0 | 1448 | |
ab432490 SM |
1449 | static void load_full_comp_unit (dwarf2_per_cu_data *per_cu, |
1450 | dwarf2_per_objfile *per_objfile, | |
4a636814 | 1451 | dwarf2_cu *existing_cu, |
ab432490 SM |
1452 | bool skip_partial, |
1453 | enum language pretend_language); | |
10b3939b | 1454 | |
8fc0b21d | 1455 | static void process_full_comp_unit (dwarf2_cu *cu, |
47b14e86 | 1456 | enum language pretend_language); |
10b3939b | 1457 | |
8fc0b21d | 1458 | static void process_full_type_unit (dwarf2_cu *cu, |
47b14e86 | 1459 | enum language pretend_language); |
f4dc4d17 | 1460 | |
b64f50a1 | 1461 | static struct type *get_die_type_at_offset (sect_offset, |
aa66c379 SM |
1462 | dwarf2_per_cu_data *per_cu, |
1463 | dwarf2_per_objfile *per_objfile); | |
673bfd45 | 1464 | |
f792889a | 1465 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1466 | |
120ce1b5 SM |
1467 | static void queue_comp_unit (dwarf2_per_cu_data *per_cu, |
1468 | dwarf2_per_objfile *per_objfile, | |
95554aad TT |
1469 | enum language pretend_language); |
1470 | ||
976ca316 | 1471 | static void process_queue (dwarf2_per_objfile *per_objfile); |
9291a0cd | 1472 | |
b303c6f6 AB |
1473 | /* Class, the destructor of which frees all allocated queue entries. This |
1474 | will only have work to do if an error was thrown while processing the | |
1475 | dwarf. If no error was thrown then the queue entries should have all | |
1476 | been processed, and freed, as we went along. */ | |
1477 | ||
1478 | class dwarf2_queue_guard | |
1479 | { | |
1480 | public: | |
39856def TT |
1481 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
1482 | : m_per_objfile (per_objfile) | |
1483 | { | |
08ac5771 SM |
1484 | gdb_assert (!m_per_objfile->per_bfd->queue.has_value ()); |
1485 | ||
1486 | m_per_objfile->per_bfd->queue.emplace (); | |
39856def | 1487 | } |
b303c6f6 AB |
1488 | |
1489 | /* Free any entries remaining on the queue. There should only be | |
1490 | entries left if we hit an error while processing the dwarf. */ | |
1491 | ~dwarf2_queue_guard () | |
1492 | { | |
08ac5771 SM |
1493 | gdb_assert (m_per_objfile->per_bfd->queue.has_value ()); |
1494 | ||
1495 | m_per_objfile->per_bfd->queue.reset (); | |
39856def | 1496 | } |
b303c6f6 | 1497 | |
39856def | 1498 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
b303c6f6 | 1499 | |
39856def TT |
1500 | private: |
1501 | dwarf2_per_objfile *m_per_objfile; | |
b303c6f6 AB |
1502 | }; |
1503 | ||
39856def TT |
1504 | dwarf2_queue_item::~dwarf2_queue_item () |
1505 | { | |
1506 | /* Anything still marked queued is likely to be in an | |
1507 | inconsistent state, so discard it. */ | |
1508 | if (per_cu->queued) | |
1509 | { | |
7188ed02 | 1510 | per_objfile->remove_cu (per_cu); |
39856def TT |
1511 | per_cu->queued = 0; |
1512 | } | |
1513 | } | |
1514 | ||
473ab964 TT |
1515 | /* See dwarf2/read.h. */ |
1516 | ||
1517 | void | |
1518 | dwarf2_per_cu_data_deleter::operator() (dwarf2_per_cu_data *data) | |
1519 | { | |
1520 | if (data->is_debug_types) | |
1521 | delete static_cast<signatured_type *> (data); | |
1522 | else | |
1523 | delete data; | |
1524 | } | |
1525 | ||
d721ba37 PA |
1526 | /* The return type of find_file_and_directory. Note, the enclosed |
1527 | string pointers are only valid while this object is valid. */ | |
1528 | ||
1529 | struct file_and_directory | |
1530 | { | |
1531 | /* The filename. This is never NULL. */ | |
1532 | const char *name; | |
1533 | ||
1534 | /* The compilation directory. NULL if not known. If we needed to | |
1535 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1536 | points directly to the DW_AT_comp_dir string attribute owned by | |
1537 | the obstack that owns the DIE. */ | |
1538 | const char *comp_dir; | |
1539 | ||
1540 | /* If we needed to build a new string for comp_dir, this is what | |
1541 | owns the storage. */ | |
1542 | std::string comp_dir_storage; | |
1543 | }; | |
1544 | ||
1545 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1546 | struct dwarf2_cu *cu); | |
9291a0cd | 1547 | |
298e9637 | 1548 | static htab_up allocate_signatured_type_table (); |
1fd400ff | 1549 | |
298e9637 | 1550 | static htab_up allocate_dwo_unit_table (); |
3019eac3 | 1551 | |
57d63ce2 | 1552 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
976ca316 SM |
1553 | (dwarf2_per_objfile *per_objfile, struct dwp_file *dwp_file, |
1554 | const char *comp_dir, ULONGEST signature, int is_debug_types); | |
a2ce51a0 | 1555 | |
976ca316 | 1556 | static struct dwp_file *get_dwp_file (dwarf2_per_objfile *per_objfile); |
a2ce51a0 | 1557 | |
3019eac3 | 1558 | static struct dwo_unit *lookup_dwo_comp_unit |
4ab09049 SM |
1559 | (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
1560 | ULONGEST signature); | |
3019eac3 DE |
1561 | |
1562 | static struct dwo_unit *lookup_dwo_type_unit | |
4ab09049 | 1563 | (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir); |
3019eac3 | 1564 | |
1b555f17 | 1565 | static void queue_and_load_all_dwo_tus (dwarf2_cu *cu); |
89e63ee4 | 1566 | |
263db9a1 TT |
1567 | /* A unique pointer to a dwo_file. */ |
1568 | ||
51ac9db5 | 1569 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 1570 | |
976ca316 | 1571 | static void process_cu_includes (dwarf2_per_objfile *per_objfile); |
95554aad | 1572 | |
1b80a9fa | 1573 | static void check_producer (struct dwarf2_cu *cu); |
4390d890 DE |
1574 | \f |
1575 | /* Various complaints about symbol reading that don't abort the process. */ | |
1576 | ||
4390d890 DE |
1577 | static void |
1578 | dwarf2_debug_line_missing_file_complaint (void) | |
1579 | { | |
b98664d3 | 1580 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1581 | } |
1582 | ||
1583 | static void | |
1584 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1585 | { | |
b98664d3 | 1586 | complaint (_(".debug_line section has line " |
4390d890 DE |
1587 | "program sequence without an end")); |
1588 | } | |
1589 | ||
1590 | static void | |
1591 | dwarf2_complex_location_expr_complaint (void) | |
1592 | { | |
b98664d3 | 1593 | complaint (_("location expression too complex")); |
4390d890 DE |
1594 | } |
1595 | ||
1596 | static void | |
1597 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1598 | int arg3) | |
1599 | { | |
b98664d3 | 1600 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1601 | arg1, arg2, arg3); |
1602 | } | |
1603 | ||
4390d890 DE |
1604 | static void |
1605 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1606 | { | |
b98664d3 | 1607 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1608 | arg1, arg2); |
1609 | } | |
527f3840 JK |
1610 | |
1611 | /* Hash function for line_header_hash. */ | |
1612 | ||
1613 | static hashval_t | |
1614 | line_header_hash (const struct line_header *ofs) | |
1615 | { | |
9c541725 | 1616 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1617 | } |
1618 | ||
1619 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1620 | ||
1621 | static hashval_t | |
1622 | line_header_hash_voidp (const void *item) | |
1623 | { | |
9a3c8263 | 1624 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1625 | |
1626 | return line_header_hash (ofs); | |
1627 | } | |
1628 | ||
1629 | /* Equality function for line_header_hash. */ | |
1630 | ||
1631 | static int | |
1632 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1633 | { | |
9a3c8263 SM |
1634 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1635 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1636 | |
9c541725 | 1637 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1638 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1639 | } | |
1640 | ||
4390d890 | 1641 | \f |
9291a0cd | 1642 | |
330cdd98 PA |
1643 | /* See declaration. */ |
1644 | ||
5989a64e SM |
1645 | dwarf2_per_bfd::dwarf2_per_bfd (bfd *obfd, const dwarf2_debug_sections *names, |
1646 | bool can_copy_) | |
c3699833 SM |
1647 | : obfd (obfd), |
1648 | can_copy (can_copy_) | |
330cdd98 PA |
1649 | { |
1650 | if (names == NULL) | |
1651 | names = &dwarf2_elf_names; | |
1652 | ||
330cdd98 PA |
1653 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) |
1654 | locate_sections (obfd, sec, *names); | |
1655 | } | |
1656 | ||
5989a64e | 1657 | dwarf2_per_bfd::~dwarf2_per_bfd () |
330cdd98 | 1658 | { |
0d305d5c | 1659 | for (auto &per_cu : all_comp_units) |
ae640021 | 1660 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1661 | |
5989a64e | 1662 | /* Everything else should be on this->obstack. */ |
330cdd98 PA |
1663 | } |
1664 | ||
7188ed02 | 1665 | /* See read.h. */ |
330cdd98 PA |
1666 | |
1667 | void | |
7188ed02 | 1668 | dwarf2_per_objfile::remove_all_cus () |
330cdd98 | 1669 | { |
08ac5771 SM |
1670 | gdb_assert (!this->per_bfd->queue.has_value ()); |
1671 | ||
7188ed02 SM |
1672 | for (auto pair : m_dwarf2_cus) |
1673 | delete pair.second; | |
330cdd98 | 1674 | |
7188ed02 | 1675 | m_dwarf2_cus.clear (); |
330cdd98 PA |
1676 | } |
1677 | ||
11ed8cad TT |
1678 | /* A helper class that calls free_cached_comp_units on |
1679 | destruction. */ | |
1680 | ||
1681 | class free_cached_comp_units | |
1682 | { | |
1683 | public: | |
1684 | ||
1685 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1686 | : m_per_objfile (per_objfile) | |
1687 | { | |
1688 | } | |
1689 | ||
1690 | ~free_cached_comp_units () | |
1691 | { | |
7188ed02 | 1692 | m_per_objfile->remove_all_cus (); |
11ed8cad TT |
1693 | } |
1694 | ||
1695 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1696 | ||
1697 | private: | |
1698 | ||
1699 | dwarf2_per_objfile *m_per_objfile; | |
1700 | }; | |
1701 | ||
af758d11 SM |
1702 | /* See read.h. */ |
1703 | ||
1704 | bool | |
1705 | dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data *per_cu) const | |
1706 | { | |
1707 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1708 | ||
1709 | return this->m_symtabs[per_cu->index] != nullptr; | |
1710 | } | |
1711 | ||
1712 | /* See read.h. */ | |
1713 | ||
1714 | compunit_symtab * | |
1715 | dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data *per_cu) const | |
1716 | { | |
1717 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1718 | ||
1719 | return this->m_symtabs[per_cu->index]; | |
1720 | } | |
1721 | ||
1722 | /* See read.h. */ | |
1723 | ||
1724 | void | |
1725 | dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data *per_cu, | |
1726 | compunit_symtab *symtab) | |
1727 | { | |
1728 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1729 | gdb_assert (this->m_symtabs[per_cu->index] == nullptr); | |
1730 | ||
1731 | this->m_symtabs[per_cu->index] = symtab; | |
1732 | } | |
1733 | ||
c906108c | 1734 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1735 | information and return true if we have enough to do something. |
1736 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1737 | ELF names are used. CAN_COPY is true for formats where symbol |
1738 | interposition is possible and so symbol values must follow copy | |
1739 | relocation rules. */ | |
c906108c SS |
1740 | |
1741 | int | |
251d32d9 | 1742 | dwarf2_has_info (struct objfile *objfile, |
dda83cd7 | 1743 | const struct dwarf2_debug_sections *names, |
4b610737 | 1744 | bool can_copy) |
c906108c | 1745 | { |
97cbe998 SDJ |
1746 | if (objfile->flags & OBJF_READNEVER) |
1747 | return 0; | |
1748 | ||
976ca316 | 1749 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 1750 | |
976ca316 | 1751 | if (per_objfile == NULL) |
5989a64e | 1752 | { |
17ee85fc TT |
1753 | dwarf2_per_bfd *per_bfd; |
1754 | ||
8a91fbdf SM |
1755 | /* We can share a "dwarf2_per_bfd" with other objfiles if the |
1756 | BFD doesn't require relocations. | |
1757 | ||
1758 | We don't share with objfiles for which -readnow was requested, | |
1759 | because it would complicate things when loading the same BFD with | |
1760 | -readnow and then without -readnow. */ | |
1761 | if (!gdb_bfd_requires_relocations (objfile->obfd) | |
1762 | && (objfile->flags & OBJF_READNOW) == 0) | |
17ee85fc TT |
1763 | { |
1764 | /* See if one has been created for this BFD yet. */ | |
1765 | per_bfd = dwarf2_per_bfd_bfd_data_key.get (objfile->obfd); | |
1766 | ||
1767 | if (per_bfd == nullptr) | |
1768 | { | |
1769 | /* No, create it now. */ | |
1770 | per_bfd = new dwarf2_per_bfd (objfile->obfd, names, can_copy); | |
1771 | dwarf2_per_bfd_bfd_data_key.set (objfile->obfd, per_bfd); | |
1772 | } | |
1773 | } | |
1774 | else | |
1775 | { | |
1776 | /* No sharing possible, create one specifically for this objfile. */ | |
1777 | per_bfd = new dwarf2_per_bfd (objfile->obfd, names, can_copy); | |
1778 | dwarf2_per_bfd_objfile_data_key.set (objfile, per_bfd); | |
1779 | } | |
5989a64e | 1780 | |
976ca316 | 1781 | per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, per_bfd); |
5989a64e | 1782 | } |
5bfd760d | 1783 | |
976ca316 SM |
1784 | return (!per_objfile->per_bfd->info.is_virtual |
1785 | && per_objfile->per_bfd->info.s.section != NULL | |
1786 | && !per_objfile->per_bfd->abbrev.is_virtual | |
1787 | && per_objfile->per_bfd->abbrev.s.section != NULL); | |
73869dc2 DE |
1788 | } |
1789 | ||
330cdd98 | 1790 | /* See declaration. */ |
c906108c | 1791 | |
330cdd98 | 1792 | void |
5989a64e SM |
1793 | dwarf2_per_bfd::locate_sections (bfd *abfd, asection *sectp, |
1794 | const dwarf2_debug_sections &names) | |
c906108c | 1795 | { |
fd361982 | 1796 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1797 | |
dc7650b8 JK |
1798 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1799 | { | |
1800 | } | |
950b7495 KS |
1801 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1802 | > bfd_get_file_size (abfd)) | |
1803 | { | |
1804 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1805 | warning (_("Discarding section %s which has a section size (%s" | |
1806 | ") larger than the file size [in module %s]"), | |
1807 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1808 | bfd_get_filename (abfd)); | |
1809 | } | |
fbedd546 | 1810 | else if (names.info.matches (sectp->name)) |
c906108c | 1811 | { |
330cdd98 | 1812 | this->info.s.section = sectp; |
fd361982 | 1813 | this->info.size = bfd_section_size (sectp); |
c906108c | 1814 | } |
fbedd546 | 1815 | else if (names.abbrev.matches (sectp->name)) |
c906108c | 1816 | { |
330cdd98 | 1817 | this->abbrev.s.section = sectp; |
fd361982 | 1818 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1819 | } |
fbedd546 | 1820 | else if (names.line.matches (sectp->name)) |
c906108c | 1821 | { |
330cdd98 | 1822 | this->line.s.section = sectp; |
fd361982 | 1823 | this->line.size = bfd_section_size (sectp); |
c906108c | 1824 | } |
fbedd546 | 1825 | else if (names.loc.matches (sectp->name)) |
c906108c | 1826 | { |
330cdd98 | 1827 | this->loc.s.section = sectp; |
fd361982 | 1828 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1829 | } |
fbedd546 | 1830 | else if (names.loclists.matches (sectp->name)) |
43988095 | 1831 | { |
330cdd98 | 1832 | this->loclists.s.section = sectp; |
fd361982 | 1833 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1834 | } |
fbedd546 | 1835 | else if (names.macinfo.matches (sectp->name)) |
c906108c | 1836 | { |
330cdd98 | 1837 | this->macinfo.s.section = sectp; |
fd361982 | 1838 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1839 | } |
fbedd546 | 1840 | else if (names.macro.matches (sectp->name)) |
cf2c3c16 | 1841 | { |
330cdd98 | 1842 | this->macro.s.section = sectp; |
fd361982 | 1843 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1844 | } |
fbedd546 | 1845 | else if (names.str.matches (sectp->name)) |
c906108c | 1846 | { |
330cdd98 | 1847 | this->str.s.section = sectp; |
fd361982 | 1848 | this->str.size = bfd_section_size (sectp); |
c906108c | 1849 | } |
fbedd546 | 1850 | else if (names.str_offsets.matches (sectp->name)) |
18a8505e AT |
1851 | { |
1852 | this->str_offsets.s.section = sectp; | |
1853 | this->str_offsets.size = bfd_section_size (sectp); | |
1854 | } | |
fbedd546 | 1855 | else if (names.line_str.matches (sectp->name)) |
43988095 | 1856 | { |
330cdd98 | 1857 | this->line_str.s.section = sectp; |
fd361982 | 1858 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1859 | } |
fbedd546 | 1860 | else if (names.addr.matches (sectp->name)) |
3019eac3 | 1861 | { |
330cdd98 | 1862 | this->addr.s.section = sectp; |
fd361982 | 1863 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1864 | } |
fbedd546 | 1865 | else if (names.frame.matches (sectp->name)) |
b6af0555 | 1866 | { |
330cdd98 | 1867 | this->frame.s.section = sectp; |
fd361982 | 1868 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1869 | } |
fbedd546 | 1870 | else if (names.eh_frame.matches (sectp->name)) |
b6af0555 | 1871 | { |
330cdd98 | 1872 | this->eh_frame.s.section = sectp; |
fd361982 | 1873 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1874 | } |
fbedd546 | 1875 | else if (names.ranges.matches (sectp->name)) |
af34e669 | 1876 | { |
330cdd98 | 1877 | this->ranges.s.section = sectp; |
fd361982 | 1878 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1879 | } |
fbedd546 | 1880 | else if (names.rnglists.matches (sectp->name)) |
43988095 | 1881 | { |
330cdd98 | 1882 | this->rnglists.s.section = sectp; |
fd361982 | 1883 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1884 | } |
fbedd546 | 1885 | else if (names.types.matches (sectp->name)) |
348e048f | 1886 | { |
8b70b953 TT |
1887 | struct dwarf2_section_info type_section; |
1888 | ||
1889 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1890 | type_section.s.section = sectp; |
fd361982 | 1891 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1892 | |
fd5866f6 | 1893 | this->types.push_back (type_section); |
348e048f | 1894 | } |
fbedd546 | 1895 | else if (names.gdb_index.matches (sectp->name)) |
9291a0cd | 1896 | { |
330cdd98 | 1897 | this->gdb_index.s.section = sectp; |
fd361982 | 1898 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1899 | } |
fbedd546 | 1900 | else if (names.debug_names.matches (sectp->name)) |
927aa2e7 JK |
1901 | { |
1902 | this->debug_names.s.section = sectp; | |
fd361982 | 1903 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 1904 | } |
fbedd546 | 1905 | else if (names.debug_aranges.matches (sectp->name)) |
927aa2e7 JK |
1906 | { |
1907 | this->debug_aranges.s.section = sectp; | |
fd361982 | 1908 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 1909 | } |
dce234bc | 1910 | |
fd361982 AM |
1911 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
1912 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 1913 | this->has_section_at_zero = true; |
c906108c SS |
1914 | } |
1915 | ||
dce234bc | 1916 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1917 | SECTION_NAME. */ |
af34e669 | 1918 | |
dce234bc | 1919 | void |
3017a003 | 1920 | dwarf2_get_section_info (struct objfile *objfile, |
dda83cd7 SM |
1921 | enum dwarf2_section_enum sect, |
1922 | asection **sectp, const gdb_byte **bufp, | |
1923 | bfd_size_type *sizep) | |
dce234bc | 1924 | { |
976ca316 | 1925 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
dce234bc | 1926 | struct dwarf2_section_info *info; |
a3b2a86b TT |
1927 | |
1928 | /* We may see an objfile without any DWARF, in which case we just | |
1929 | return nothing. */ | |
976ca316 | 1930 | if (per_objfile == NULL) |
a3b2a86b TT |
1931 | { |
1932 | *sectp = NULL; | |
1933 | *bufp = NULL; | |
1934 | *sizep = 0; | |
1935 | return; | |
1936 | } | |
3017a003 TG |
1937 | switch (sect) |
1938 | { | |
1939 | case DWARF2_DEBUG_FRAME: | |
976ca316 | 1940 | info = &per_objfile->per_bfd->frame; |
3017a003 TG |
1941 | break; |
1942 | case DWARF2_EH_FRAME: | |
976ca316 | 1943 | info = &per_objfile->per_bfd->eh_frame; |
3017a003 TG |
1944 | break; |
1945 | default: | |
1946 | gdb_assert_not_reached ("unexpected section"); | |
1947 | } | |
dce234bc | 1948 | |
96b79293 | 1949 | info->read (objfile); |
dce234bc | 1950 | |
96b79293 | 1951 | *sectp = info->get_bfd_section (); |
dce234bc PP |
1952 | *bufp = info->buffer; |
1953 | *sizep = info->size; | |
1954 | } | |
1955 | ||
9291a0cd | 1956 | \f |
39298a5d | 1957 | /* DWARF quick_symbol_functions support. */ |
7b9f3c50 DE |
1958 | |
1959 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
1960 | unique line tables, so we maintain a separate table of all .debug_line | |
1961 | derived entries to support the sharing. | |
1962 | All the quick functions need is the list of file names. We discard the | |
1963 | line_header when we're done and don't need to record it here. */ | |
1964 | struct quick_file_names | |
1965 | { | |
094b34ac DE |
1966 | /* The data used to construct the hash key. */ |
1967 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
1968 | |
1969 | /* The number of entries in file_names, real_names. */ | |
1970 | unsigned int num_file_names; | |
1971 | ||
1972 | /* The file names from the line table, after being run through | |
1973 | file_full_name. */ | |
1974 | const char **file_names; | |
1975 | ||
1976 | /* The file names from the line table after being run through | |
1977 | gdb_realpath. These are computed lazily. */ | |
1978 | const char **real_names; | |
1979 | }; | |
1980 | ||
1981 | /* When using the index (and thus not using psymtabs), each CU has an | |
1982 | object of this type. This is used to hold information needed by | |
1983 | the various "quick" methods. */ | |
1984 | struct dwarf2_per_cu_quick_data | |
1985 | { | |
1986 | /* The file table. This can be NULL if there was no file table | |
1987 | or it's currently not read in. | |
5989a64e | 1988 | NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */ |
7b9f3c50 DE |
1989 | struct quick_file_names *file_names; |
1990 | ||
7b9f3c50 DE |
1991 | /* A temporary mark bit used when iterating over all CUs in |
1992 | expand_symtabs_matching. */ | |
1993 | unsigned int mark : 1; | |
1994 | ||
1995 | /* True if we've tried to read the file table and found there isn't one. | |
1996 | There will be no point in trying to read it again next time. */ | |
1997 | unsigned int no_file_data : 1; | |
1998 | }; | |
1999 | ||
edc02ceb TT |
2000 | /* A subclass of psymbol_functions that arranges to read the DWARF |
2001 | partial symbols when needed. */ | |
2002 | struct lazy_dwarf_reader : public psymbol_functions | |
2003 | { | |
2004 | using psymbol_functions::psymbol_functions; | |
2005 | ||
2006 | bool can_lazily_read_symbols () override | |
2007 | { | |
2008 | return true; | |
2009 | } | |
2010 | ||
2011 | void read_partial_symbols (struct objfile *objfile) override | |
2012 | { | |
2013 | if (dwarf2_has_info (objfile, nullptr)) | |
2014 | dwarf2_build_psymtabs (objfile, this); | |
2015 | } | |
2016 | }; | |
2017 | ||
2018 | static quick_symbol_functions_up | |
2019 | make_lazy_dwarf_reader () | |
2020 | { | |
2021 | return quick_symbol_functions_up (new lazy_dwarf_reader); | |
2022 | } | |
2023 | ||
39298a5d TT |
2024 | struct dwarf2_base_index_functions : public quick_symbol_functions |
2025 | { | |
2026 | bool has_symbols (struct objfile *objfile) override; | |
2027 | ||
2028 | struct symtab *find_last_source_symtab (struct objfile *objfile) override; | |
2029 | ||
2030 | void forget_cached_source_info (struct objfile *objfile) override; | |
2031 | ||
39298a5d TT |
2032 | enum language lookup_global_symbol_language (struct objfile *objfile, |
2033 | const char *name, | |
2034 | domain_enum domain, | |
2035 | bool *symbol_found_p) override | |
2036 | { | |
2037 | *symbol_found_p = false; | |
2038 | return language_unknown; | |
2039 | } | |
2040 | ||
4829711b | 2041 | void print_stats (struct objfile *objfile, bool print_bcache) override; |
39298a5d TT |
2042 | |
2043 | void expand_all_symtabs (struct objfile *objfile) override; | |
2044 | ||
39298a5d TT |
2045 | struct compunit_symtab *find_pc_sect_compunit_symtab |
2046 | (struct objfile *objfile, struct bound_minimal_symbol msymbol, | |
2047 | CORE_ADDR pc, struct obj_section *section, int warn_if_readin) override; | |
2048 | ||
2049 | struct compunit_symtab *find_compunit_symtab_by_address | |
2050 | (struct objfile *objfile, CORE_ADDR address) override | |
2051 | { | |
2052 | return nullptr; | |
2053 | } | |
2054 | ||
2055 | void map_symbol_filenames (struct objfile *objfile, | |
f4655dee TT |
2056 | gdb::function_view<symbol_filename_ftype> fun, |
2057 | bool need_fullname) override; | |
39298a5d TT |
2058 | }; |
2059 | ||
2060 | struct dwarf2_gdb_index : public dwarf2_base_index_functions | |
2061 | { | |
39298a5d TT |
2062 | void dump (struct objfile *objfile) override; |
2063 | ||
0b7b2c2a | 2064 | void expand_matching_symbols |
39298a5d TT |
2065 | (struct objfile *, |
2066 | const lookup_name_info &lookup_name, | |
2067 | domain_enum domain, | |
2068 | int global, | |
39298a5d TT |
2069 | symbol_compare_ftype *ordered_compare) override; |
2070 | ||
df35e626 | 2071 | bool expand_symtabs_matching |
39298a5d TT |
2072 | (struct objfile *objfile, |
2073 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
2074 | const lookup_name_info *lookup_name, | |
2075 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
2076 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 2077 | block_search_flags search_flags, |
3bfa51a7 | 2078 | domain_enum domain, |
39298a5d TT |
2079 | enum search_domain kind) override; |
2080 | }; | |
2081 | ||
2082 | struct dwarf2_debug_names_index : public dwarf2_base_index_functions | |
2083 | { | |
39298a5d TT |
2084 | void dump (struct objfile *objfile) override; |
2085 | ||
0b7b2c2a | 2086 | void expand_matching_symbols |
39298a5d TT |
2087 | (struct objfile *, |
2088 | const lookup_name_info &lookup_name, | |
2089 | domain_enum domain, | |
2090 | int global, | |
39298a5d TT |
2091 | symbol_compare_ftype *ordered_compare) override; |
2092 | ||
df35e626 | 2093 | bool expand_symtabs_matching |
39298a5d TT |
2094 | (struct objfile *objfile, |
2095 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
2096 | const lookup_name_info *lookup_name, | |
2097 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
2098 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 2099 | block_search_flags search_flags, |
3bfa51a7 | 2100 | domain_enum domain, |
39298a5d TT |
2101 | enum search_domain kind) override; |
2102 | }; | |
2103 | ||
edc02ceb | 2104 | static quick_symbol_functions_up |
39298a5d TT |
2105 | make_dwarf_gdb_index () |
2106 | { | |
2107 | return quick_symbol_functions_up (new dwarf2_gdb_index); | |
2108 | } | |
2109 | ||
edc02ceb | 2110 | static quick_symbol_functions_up |
39298a5d TT |
2111 | make_dwarf_debug_names () |
2112 | { | |
2113 | return quick_symbol_functions_up (new dwarf2_debug_names_index); | |
2114 | } | |
2115 | ||
094b34ac DE |
2116 | /* Utility hash function for a stmt_list_hash. */ |
2117 | ||
2118 | static hashval_t | |
2119 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2120 | { | |
2121 | hashval_t v = 0; | |
2122 | ||
2123 | if (stmt_list_hash->dwo_unit != NULL) | |
2124 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2125 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2126 | return v; |
2127 | } | |
2128 | ||
2129 | /* Utility equality function for a stmt_list_hash. */ | |
2130 | ||
2131 | static int | |
2132 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2133 | const struct stmt_list_hash *rhs) | |
2134 | { | |
2135 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2136 | return 0; | |
2137 | if (lhs->dwo_unit != NULL | |
2138 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2139 | return 0; | |
2140 | ||
9c541725 | 2141 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2142 | } |
2143 | ||
7b9f3c50 DE |
2144 | /* Hash function for a quick_file_names. */ |
2145 | ||
2146 | static hashval_t | |
2147 | hash_file_name_entry (const void *e) | |
2148 | { | |
9a3c8263 SM |
2149 | const struct quick_file_names *file_data |
2150 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2151 | |
094b34ac | 2152 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2153 | } |
2154 | ||
2155 | /* Equality function for a quick_file_names. */ | |
2156 | ||
2157 | static int | |
2158 | eq_file_name_entry (const void *a, const void *b) | |
2159 | { | |
9a3c8263 SM |
2160 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2161 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2162 | |
094b34ac | 2163 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2164 | } |
2165 | ||
2166 | /* Delete function for a quick_file_names. */ | |
2167 | ||
2168 | static void | |
2169 | delete_file_name_entry (void *e) | |
2170 | { | |
9a3c8263 | 2171 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2172 | int i; |
2173 | ||
2174 | for (i = 0; i < file_data->num_file_names; ++i) | |
2175 | { | |
2176 | xfree ((void*) file_data->file_names[i]); | |
2177 | if (file_data->real_names) | |
2178 | xfree ((void*) file_data->real_names[i]); | |
2179 | } | |
2180 | ||
45940949 TT |
2181 | /* The space for the struct itself lives on the obstack, so we don't |
2182 | free it here. */ | |
7b9f3c50 DE |
2183 | } |
2184 | ||
2185 | /* Create a quick_file_names hash table. */ | |
2186 | ||
5895093f | 2187 | static htab_up |
7b9f3c50 DE |
2188 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2189 | { | |
5895093f TT |
2190 | return htab_up (htab_create_alloc (nr_initial_entries, |
2191 | hash_file_name_entry, eq_file_name_entry, | |
2192 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2193 | } |
9291a0cd | 2194 | |
ab432490 SM |
2195 | /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This |
2196 | function is unrelated to symtabs, symtab would have to be created afterwards. | |
2197 | You should call age_cached_comp_units after processing the CU. */ | |
918dd910 | 2198 | |
1b555f17 | 2199 | static dwarf2_cu * |
ab432490 SM |
2200 | load_cu (dwarf2_per_cu_data *per_cu, dwarf2_per_objfile *per_objfile, |
2201 | bool skip_partial) | |
918dd910 | 2202 | { |
3019eac3 | 2203 | if (per_cu->is_debug_types) |
ab432490 | 2204 | load_full_type_unit (per_cu, per_objfile); |
918dd910 | 2205 | else |
4a636814 SM |
2206 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
2207 | skip_partial, language_minimal); | |
918dd910 | 2208 | |
7188ed02 SM |
2209 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
2210 | if (cu == nullptr) | |
1b555f17 | 2211 | return nullptr; /* Dummy CU. */ |
2dc860c0 | 2212 | |
7188ed02 | 2213 | dwarf2_find_base_address (cu->dies, cu); |
1b555f17 | 2214 | |
7188ed02 | 2215 | return cu; |
918dd910 JK |
2216 | } |
2217 | ||
1350c3b4 | 2218 | /* Read in the symbols for PER_CU in the context of PER_OBJFILE. */ |
2fdf6df6 | 2219 | |
9291a0cd | 2220 | static void |
97a1449a | 2221 | dw2_do_instantiate_symtab (dwarf2_per_cu_data *per_cu, |
976ca316 | 2222 | dwarf2_per_objfile *per_objfile, bool skip_partial) |
9291a0cd | 2223 | { |
f4dc4d17 DE |
2224 | /* Skip type_unit_groups, reading the type units they contain |
2225 | is handled elsewhere. */ | |
197400e8 | 2226 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2227 | return; |
2228 | ||
08ac5771 SM |
2229 | { |
2230 | /* The destructor of dwarf2_queue_guard frees any entries left on | |
2231 | the queue. After this point we're guaranteed to leave this function | |
2232 | with the dwarf queue empty. */ | |
2233 | dwarf2_queue_guard q_guard (per_objfile); | |
89e63ee4 | 2234 | |
08ac5771 SM |
2235 | if (!per_objfile->symtab_set_p (per_cu)) |
2236 | { | |
2237 | queue_comp_unit (per_cu, per_objfile, language_minimal); | |
2238 | dwarf2_cu *cu = load_cu (per_cu, per_objfile, skip_partial); | |
2239 | ||
2240 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2241 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2242 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2243 | if (!per_cu->is_debug_types | |
2244 | && cu != NULL | |
2245 | && cu->dwo_unit != NULL | |
2246 | && per_objfile->per_bfd->index_table != NULL | |
2247 | && per_objfile->per_bfd->index_table->version <= 7 | |
2248 | /* DWP files aren't supported yet. */ | |
2249 | && get_dwp_file (per_objfile) == NULL) | |
2250 | queue_and_load_all_dwo_tus (cu); | |
2251 | } | |
9291a0cd | 2252 | |
08ac5771 SM |
2253 | process_queue (per_objfile); |
2254 | } | |
9291a0cd TT |
2255 | |
2256 | /* Age the cache, releasing compilation units that have not | |
2257 | been used recently. */ | |
976ca316 | 2258 | per_objfile->age_comp_units (); |
9291a0cd TT |
2259 | } |
2260 | ||
97a1449a SM |
2261 | /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is |
2262 | the per-objfile for which this symtab is instantiated. | |
2263 | ||
2264 | Returns the resulting symbol table. */ | |
2fdf6df6 | 2265 | |
43f3e411 | 2266 | static struct compunit_symtab * |
97a1449a | 2267 | dw2_instantiate_symtab (dwarf2_per_cu_data *per_cu, |
976ca316 | 2268 | dwarf2_per_objfile *per_objfile, |
97a1449a | 2269 | bool skip_partial) |
9291a0cd | 2270 | { |
976ca316 | 2271 | gdb_assert (per_objfile->per_bfd->using_index); |
af758d11 | 2272 | |
976ca316 | 2273 | if (!per_objfile->symtab_set_p (per_cu)) |
9291a0cd | 2274 | { |
976ca316 | 2275 | free_cached_comp_units freer (per_objfile); |
c83dd867 | 2276 | scoped_restore decrementer = increment_reading_symtab (); |
976ca316 SM |
2277 | dw2_do_instantiate_symtab (per_cu, per_objfile, skip_partial); |
2278 | process_cu_includes (per_objfile); | |
9291a0cd | 2279 | } |
f194fefb | 2280 | |
976ca316 | 2281 | return per_objfile->get_symtab (per_cu); |
9291a0cd TT |
2282 | } |
2283 | ||
d3473f0c TT |
2284 | /* See read.h. */ |
2285 | ||
473ab964 | 2286 | dwarf2_per_cu_data_up |
5989a64e | 2287 | dwarf2_per_bfd::allocate_per_cu () |
d3473f0c | 2288 | { |
473ab964 | 2289 | dwarf2_per_cu_data_up result (new dwarf2_per_cu_data); |
1859c670 | 2290 | result->per_bfd = this; |
d3473f0c TT |
2291 | result->index = m_num_psymtabs++; |
2292 | return result; | |
2293 | } | |
2294 | ||
2295 | /* See read.h. */ | |
2296 | ||
0d305d5c | 2297 | std::unique_ptr<signatured_type> |
5989a64e | 2298 | dwarf2_per_bfd::allocate_signatured_type () |
d3473f0c | 2299 | { |
0d305d5c TT |
2300 | std::unique_ptr<signatured_type> result (new signatured_type); |
2301 | result->per_bfd = this; | |
2302 | result->index = m_num_psymtabs++; | |
91eea9cc | 2303 | tu_stats.nr_tus++; |
d3473f0c TT |
2304 | return result; |
2305 | } | |
2306 | ||
168c9250 | 2307 | /* Return a new dwarf2_per_cu_data allocated on the per-bfd |
45940949 | 2308 | obstack, and constructed with the specified field values. */ |
4b514bc8 | 2309 | |
473ab964 | 2310 | static dwarf2_per_cu_data_up |
168c9250 SM |
2311 | create_cu_from_index_list (dwarf2_per_bfd *per_bfd, |
2312 | struct dwarf2_section_info *section, | |
2313 | int is_dwz, | |
2314 | sect_offset sect_off, ULONGEST length) | |
4b514bc8 | 2315 | { |
473ab964 | 2316 | dwarf2_per_cu_data_up the_cu = per_bfd->allocate_per_cu (); |
4b514bc8 JK |
2317 | the_cu->sect_off = sect_off; |
2318 | the_cu->length = length; | |
4b514bc8 | 2319 | the_cu->section = section; |
168c9250 | 2320 | the_cu->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
45940949 | 2321 | struct dwarf2_per_cu_quick_data); |
4b514bc8 JK |
2322 | the_cu->is_dwz = is_dwz; |
2323 | return the_cu; | |
2324 | } | |
2325 | ||
2ec9a5e0 TT |
2326 | /* A helper for create_cus_from_index that handles a given list of |
2327 | CUs. */ | |
2fdf6df6 | 2328 | |
74a0d9f6 | 2329 | static void |
168c9250 | 2330 | create_cus_from_index_list (dwarf2_per_bfd *per_bfd, |
2ec9a5e0 TT |
2331 | const gdb_byte *cu_list, offset_type n_elements, |
2332 | struct dwarf2_section_info *section, | |
b76e467d | 2333 | int is_dwz) |
9291a0cd | 2334 | { |
12359b5e | 2335 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2336 | { |
74a0d9f6 | 2337 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2338 | |
2339 | sect_offset sect_off | |
2340 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2341 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2342 | cu_list += 2 * 8; |
2343 | ||
473ab964 | 2344 | dwarf2_per_cu_data_up per_cu |
168c9250 SM |
2345 | = create_cu_from_index_list (per_bfd, section, is_dwz, sect_off, |
2346 | length); | |
0d305d5c | 2347 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
9291a0cd | 2348 | } |
9291a0cd TT |
2349 | } |
2350 | ||
2ec9a5e0 | 2351 | /* Read the CU list from the mapped index, and use it to create all |
168c9250 | 2352 | the CU objects for PER_BFD. */ |
2ec9a5e0 | 2353 | |
74a0d9f6 | 2354 | static void |
168c9250 | 2355 | create_cus_from_index (dwarf2_per_bfd *per_bfd, |
2ec9a5e0 TT |
2356 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2357 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2358 | { | |
168c9250 SM |
2359 | gdb_assert (per_bfd->all_comp_units.empty ()); |
2360 | per_bfd->all_comp_units.reserve ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2361 | |
168c9250 SM |
2362 | create_cus_from_index_list (per_bfd, cu_list, cu_list_elements, |
2363 | &per_bfd->info, 0); | |
2ec9a5e0 TT |
2364 | |
2365 | if (dwz_elements == 0) | |
74a0d9f6 | 2366 | return; |
2ec9a5e0 | 2367 | |
168c9250 SM |
2368 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
2369 | create_cus_from_index_list (per_bfd, dwz_list, dwz_elements, | |
b76e467d | 2370 | &dwz->info, 1); |
2ec9a5e0 TT |
2371 | } |
2372 | ||
1fd400ff | 2373 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2374 | |
74a0d9f6 | 2375 | static void |
12359b5e | 2376 | create_signatured_type_table_from_index |
168c9250 SM |
2377 | (dwarf2_per_bfd *per_bfd, struct dwarf2_section_info *section, |
2378 | const gdb_byte *bytes, offset_type elements) | |
1fd400ff | 2379 | { |
298e9637 | 2380 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2381 | |
12359b5e | 2382 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2383 | { |
0d305d5c | 2384 | std::unique_ptr<signatured_type> sig_type; |
9c541725 | 2385 | ULONGEST signature; |
1fd400ff | 2386 | void **slot; |
9c541725 | 2387 | cu_offset type_offset_in_tu; |
1fd400ff | 2388 | |
74a0d9f6 | 2389 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2390 | sect_offset sect_off |
2391 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2392 | type_offset_in_tu | |
2393 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2394 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2395 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2396 | bytes += 3 * 8; | |
2397 | ||
168c9250 | 2398 | sig_type = per_bfd->allocate_signatured_type (); |
52dc124a | 2399 | sig_type->signature = signature; |
9c541725 | 2400 | sig_type->type_offset_in_tu = type_offset_in_tu; |
0d305d5c TT |
2401 | sig_type->is_debug_types = 1; |
2402 | sig_type->section = section; | |
2403 | sig_type->sect_off = sect_off; | |
2404 | sig_type->v.quick | |
168c9250 | 2405 | = OBSTACK_ZALLOC (&per_bfd->obstack, |
1fd400ff TT |
2406 | struct dwarf2_per_cu_quick_data); |
2407 | ||
0d305d5c TT |
2408 | slot = htab_find_slot (sig_types_hash.get (), sig_type.get (), INSERT); |
2409 | *slot = sig_type.get (); | |
1fd400ff | 2410 | |
473ab964 | 2411 | per_bfd->all_comp_units.emplace_back (sig_type.release ()); |
1fd400ff TT |
2412 | } |
2413 | ||
168c9250 | 2414 | per_bfd->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2415 | } |
2416 | ||
927aa2e7 JK |
2417 | /* Create the signatured type hash table from .debug_names. */ |
2418 | ||
2419 | static void | |
2420 | create_signatured_type_table_from_debug_names | |
976ca316 | 2421 | (dwarf2_per_objfile *per_objfile, |
927aa2e7 JK |
2422 | const mapped_debug_names &map, |
2423 | struct dwarf2_section_info *section, | |
2424 | struct dwarf2_section_info *abbrev_section) | |
2425 | { | |
976ca316 | 2426 | struct objfile *objfile = per_objfile->objfile; |
ed2dc618 | 2427 | |
96b79293 TT |
2428 | section->read (objfile); |
2429 | abbrev_section->read (objfile); | |
927aa2e7 | 2430 | |
298e9637 | 2431 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2432 | |
2433 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2434 | { | |
0d305d5c | 2435 | std::unique_ptr<signatured_type> sig_type; |
927aa2e7 | 2436 | void **slot; |
927aa2e7 JK |
2437 | |
2438 | sect_offset sect_off | |
2439 | = (sect_offset) (extract_unsigned_integer | |
2440 | (map.tu_table_reordered + i * map.offset_size, | |
2441 | map.offset_size, | |
2442 | map.dwarf5_byte_order)); | |
2443 | ||
2444 | comp_unit_head cu_header; | |
976ca316 | 2445 | read_and_check_comp_unit_head (per_objfile, &cu_header, section, |
ed2dc618 | 2446 | abbrev_section, |
927aa2e7 JK |
2447 | section->buffer + to_underlying (sect_off), |
2448 | rcuh_kind::TYPE); | |
2449 | ||
976ca316 | 2450 | sig_type = per_objfile->per_bfd->allocate_signatured_type (); |
927aa2e7 JK |
2451 | sig_type->signature = cu_header.signature; |
2452 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
0d305d5c TT |
2453 | sig_type->is_debug_types = 1; |
2454 | sig_type->section = section; | |
2455 | sig_type->sect_off = sect_off; | |
2456 | sig_type->v.quick | |
976ca316 | 2457 | = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, |
927aa2e7 JK |
2458 | struct dwarf2_per_cu_quick_data); |
2459 | ||
0d305d5c TT |
2460 | slot = htab_find_slot (sig_types_hash.get (), sig_type.get (), INSERT); |
2461 | *slot = sig_type.get (); | |
927aa2e7 | 2462 | |
473ab964 | 2463 | per_objfile->per_bfd->all_comp_units.emplace_back (sig_type.release ()); |
927aa2e7 JK |
2464 | } |
2465 | ||
976ca316 | 2466 | per_objfile->per_bfd->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2467 | } |
2468 | ||
9291a0cd | 2469 | /* Read the address map data from the mapped index, and use it to |
efd7398e | 2470 | populate the psymtabs_addrmap. */ |
2fdf6df6 | 2471 | |
9291a0cd | 2472 | static void |
976ca316 | 2473 | create_addrmap_from_index (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 2474 | struct mapped_index *index) |
9291a0cd | 2475 | { |
976ca316 | 2476 | struct objfile *objfile = per_objfile->objfile; |
efd7398e | 2477 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
08feed99 | 2478 | struct gdbarch *gdbarch = objfile->arch (); |
9291a0cd | 2479 | const gdb_byte *iter, *end; |
9291a0cd | 2480 | struct addrmap *mutable_map; |
9291a0cd TT |
2481 | CORE_ADDR baseaddr; |
2482 | ||
8268c778 PA |
2483 | auto_obstack temp_obstack; |
2484 | ||
9291a0cd TT |
2485 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2486 | ||
f00a2de2 PA |
2487 | iter = index->address_table.data (); |
2488 | end = iter + index->address_table.size (); | |
9291a0cd | 2489 | |
b3b3bada | 2490 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2491 | |
2492 | while (iter < end) | |
2493 | { | |
2494 | ULONGEST hi, lo, cu_index; | |
2495 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2496 | iter += 8; | |
2497 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2498 | iter += 8; | |
2499 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2500 | iter += 4; | |
f652bce2 | 2501 | |
24a55014 | 2502 | if (lo > hi) |
f652bce2 | 2503 | { |
b98664d3 | 2504 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2505 | hex_string (lo), hex_string (hi)); |
24a55014 | 2506 | continue; |
f652bce2 | 2507 | } |
24a55014 | 2508 | |
efd7398e | 2509 | if (cu_index >= per_bfd->all_comp_units.size ()) |
f652bce2 | 2510 | { |
b98664d3 | 2511 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2512 | (unsigned) cu_index); |
24a55014 | 2513 | continue; |
f652bce2 | 2514 | } |
24a55014 | 2515 | |
79748972 TT |
2516 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2517 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2518 | addrmap_set_empty (mutable_map, lo, hi - 1, |
efd7398e | 2519 | per_bfd->get_cu (cu_index)); |
9291a0cd TT |
2520 | } |
2521 | ||
efd7398e TT |
2522 | per_bfd->index_addrmap = addrmap_create_fixed (mutable_map, |
2523 | &per_bfd->obstack); | |
9291a0cd TT |
2524 | } |
2525 | ||
927aa2e7 | 2526 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
efd7398e | 2527 | populate the psymtabs_addrmap. */ |
927aa2e7 JK |
2528 | |
2529 | static void | |
976ca316 | 2530 | create_addrmap_from_aranges (dwarf2_per_objfile *per_objfile, |
927aa2e7 JK |
2531 | struct dwarf2_section_info *section) |
2532 | { | |
976ca316 | 2533 | struct objfile *objfile = per_objfile->objfile; |
927aa2e7 | 2534 | bfd *abfd = objfile->obfd; |
08feed99 | 2535 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 2536 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
efd7398e | 2537 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
927aa2e7 JK |
2538 | |
2539 | auto_obstack temp_obstack; | |
2540 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2541 | ||
2542 | std::unordered_map<sect_offset, | |
2543 | dwarf2_per_cu_data *, | |
2544 | gdb::hash_enum<sect_offset>> | |
2545 | debug_info_offset_to_per_cu; | |
0d305d5c | 2546 | for (const auto &per_cu : per_bfd->all_comp_units) |
927aa2e7 | 2547 | { |
927aa2e7 | 2548 | const auto insertpair |
0d305d5c TT |
2549 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, |
2550 | per_cu.get ()); | |
927aa2e7 JK |
2551 | if (!insertpair.second) |
2552 | { | |
2553 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2554 | "debug_info_offset %s, ignoring .debug_aranges."), |
2555 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2556 | return; |
2557 | } | |
2558 | } | |
2559 | ||
96b79293 | 2560 | section->read (objfile); |
927aa2e7 JK |
2561 | |
2562 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2563 | ||
2564 | const gdb_byte *addr = section->buffer; | |
2565 | ||
2566 | while (addr < section->buffer + section->size) | |
2567 | { | |
2568 | const gdb_byte *const entry_addr = addr; | |
2569 | unsigned int bytes_read; | |
2570 | ||
2571 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2572 | &bytes_read); | |
2573 | addr += bytes_read; | |
2574 | ||
2575 | const gdb_byte *const entry_end = addr + entry_length; | |
2576 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2577 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2578 | if (addr + entry_length > section->buffer + section->size) | |
2579 | { | |
47e3f474 | 2580 | warning (_("Section .debug_aranges in %s entry at offset %s " |
dda83cd7 | 2581 | "length %s exceeds section length %s, " |
927aa2e7 | 2582 | "ignoring .debug_aranges."), |
47e3f474 TV |
2583 | objfile_name (objfile), |
2584 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2585 | plongest (bytes_read + entry_length), |
2586 | pulongest (section->size)); | |
2587 | return; | |
2588 | } | |
2589 | ||
2590 | /* The version number. */ | |
2591 | const uint16_t version = read_2_bytes (abfd, addr); | |
2592 | addr += 2; | |
2593 | if (version != 2) | |
2594 | { | |
47e3f474 | 2595 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2596 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2597 | objfile_name (objfile), |
2598 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2599 | return; |
2600 | } | |
2601 | ||
2602 | const uint64_t debug_info_offset | |
2603 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2604 | addr += offset_size; | |
2605 | const auto per_cu_it | |
2606 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2607 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2608 | { | |
47e3f474 | 2609 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2610 | "debug_info_offset %s does not exists, " |
2611 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2612 | objfile_name (objfile), |
2613 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2614 | pulongest (debug_info_offset)); |
2615 | return; | |
2616 | } | |
2617 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2618 | ||
2619 | const uint8_t address_size = *addr++; | |
2620 | if (address_size < 1 || address_size > 8) | |
2621 | { | |
47e3f474 | 2622 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2623 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2624 | objfile_name (objfile), |
2625 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2626 | return; |
2627 | } | |
2628 | ||
2629 | const uint8_t segment_selector_size = *addr++; | |
2630 | if (segment_selector_size != 0) | |
2631 | { | |
47e3f474 | 2632 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2633 | "segment_selector_size %u is not supported, " |
2634 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2635 | objfile_name (objfile), |
2636 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2637 | segment_selector_size); |
2638 | return; | |
2639 | } | |
2640 | ||
2641 | /* Must pad to an alignment boundary that is twice the address | |
dda83cd7 SM |
2642 | size. It is undocumented by the DWARF standard but GCC does |
2643 | use it. */ | |
927aa2e7 JK |
2644 | for (size_t padding = ((-(addr - section->buffer)) |
2645 | & (2 * address_size - 1)); | |
dda83cd7 | 2646 | padding > 0; padding--) |
927aa2e7 JK |
2647 | if (*addr++ != 0) |
2648 | { | |
47e3f474 | 2649 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2650 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2651 | objfile_name (objfile), |
2652 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2653 | return; |
2654 | } | |
2655 | ||
2656 | for (;;) | |
2657 | { | |
2658 | if (addr + 2 * address_size > entry_end) | |
2659 | { | |
47e3f474 | 2660 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2661 | "address list is not properly terminated, " |
2662 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2663 | objfile_name (objfile), |
2664 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2665 | return; |
2666 | } | |
2667 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2668 | dwarf5_byte_order); | |
2669 | addr += address_size; | |
2670 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2671 | dwarf5_byte_order); | |
2672 | addr += address_size; | |
2673 | if (start == 0 && length == 0) | |
2674 | break; | |
efd7398e | 2675 | if (start == 0 && !per_bfd->has_section_at_zero) |
927aa2e7 JK |
2676 | { |
2677 | /* Symbol was eliminated due to a COMDAT group. */ | |
2678 | continue; | |
2679 | } | |
2680 | ULONGEST end = start + length; | |
79748972 TT |
2681 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2682 | - baseaddr); | |
2683 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2684 | - baseaddr); | |
927aa2e7 JK |
2685 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2686 | } | |
2687 | } | |
2688 | ||
efd7398e TT |
2689 | per_bfd->index_addrmap = addrmap_create_fixed (mutable_map, |
2690 | &per_bfd->obstack); | |
927aa2e7 JK |
2691 | } |
2692 | ||
4485a1c1 SM |
2693 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2694 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2695 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2696 | ok to use deprecated sections. |
2697 | ||
2698 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2699 | out parameters that are filled in with information about the CU and | |
2700 | TU lists in the section. | |
2701 | ||
4485a1c1 | 2702 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2703 | |
d33bc52e | 2704 | static bool |
3810f182 | 2705 | read_gdb_index_from_buffer (const char *filename, |
4485a1c1 SM |
2706 | bool deprecated_ok, |
2707 | gdb::array_view<const gdb_byte> buffer, | |
2708 | struct mapped_index *map, | |
2709 | const gdb_byte **cu_list, | |
2710 | offset_type *cu_list_elements, | |
2711 | const gdb_byte **types_list, | |
2712 | offset_type *types_list_elements) | |
2713 | { | |
2714 | const gdb_byte *addr = &buffer[0]; | |
42c2c694 | 2715 | offset_view metadata (buffer); |
82430852 | 2716 | |
9291a0cd | 2717 | /* Version check. */ |
42c2c694 | 2718 | offset_type version = metadata[0]; |
987d643c | 2719 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2720 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2721 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2722 | indices. */ |
831adc1f | 2723 | if (version < 4) |
481860b3 GB |
2724 | { |
2725 | static int warning_printed = 0; | |
2726 | if (!warning_printed) | |
2727 | { | |
2728 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2729 | filename); |
481860b3 GB |
2730 | warning_printed = 1; |
2731 | } | |
2732 | return 0; | |
2733 | } | |
2734 | /* Index version 4 uses a different hash function than index version | |
2735 | 5 and later. | |
2736 | ||
2737 | Versions earlier than 6 did not emit psymbols for inlined | |
2738 | functions. Using these files will cause GDB not to be able to | |
2739 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2740 | indices unless the user has done |
2741 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2742 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2743 | { |
2744 | static int warning_printed = 0; | |
2745 | if (!warning_printed) | |
2746 | { | |
e615022a DE |
2747 | warning (_("\ |
2748 | Skipping deprecated .gdb_index section in %s.\n\ | |
2749 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2750 | to use the section anyway."), | |
2ec9a5e0 | 2751 | filename); |
481860b3 GB |
2752 | warning_printed = 1; |
2753 | } | |
2754 | return 0; | |
2755 | } | |
796a7ff8 | 2756 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2757 | of the TU (for symbols coming from TUs), |
2758 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2759 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2760 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2761 | These are just performance bugs, and we can't distinguish gdb-generated | |
2762 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2763 | |
481860b3 | 2764 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2765 | longer backward compatible. */ |
796a7ff8 | 2766 | if (version > 8) |
594e8718 | 2767 | return 0; |
9291a0cd | 2768 | |
559a7a62 | 2769 | map->version = version; |
9291a0cd | 2770 | |
42c2c694 TT |
2771 | int i = 1; |
2772 | *cu_list = addr + metadata[i]; | |
2773 | *cu_list_elements = (metadata[i + 1] - metadata[i]) / 8; | |
1fd400ff TT |
2774 | ++i; |
2775 | ||
42c2c694 TT |
2776 | *types_list = addr + metadata[i]; |
2777 | *types_list_elements = (metadata[i + 1] - metadata[i]) / 8; | |
987d643c | 2778 | ++i; |
1fd400ff | 2779 | |
42c2c694 TT |
2780 | const gdb_byte *address_table = addr + metadata[i]; |
2781 | const gdb_byte *address_table_end = addr + metadata[i + 1]; | |
f00a2de2 PA |
2782 | map->address_table |
2783 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2784 | ++i; |
2785 | ||
42c2c694 TT |
2786 | const gdb_byte *symbol_table = addr + metadata[i]; |
2787 | const gdb_byte *symbol_table_end = addr + metadata[i + 1]; | |
f00a2de2 | 2788 | map->symbol_table |
42c2c694 TT |
2789 | = offset_view (gdb::array_view<const gdb_byte> (symbol_table, |
2790 | symbol_table_end)); | |
9291a0cd | 2791 | |
f00a2de2 | 2792 | ++i; |
42c2c694 | 2793 | map->constant_pool = buffer.slice (metadata[i]); |
1fd400ff | 2794 | |
2ec9a5e0 TT |
2795 | return 1; |
2796 | } | |
2797 | ||
4485a1c1 SM |
2798 | /* Callback types for dwarf2_read_gdb_index. */ |
2799 | ||
2800 | typedef gdb::function_view | |
5989a64e | 2801 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_bfd *)> |
4485a1c1 SM |
2802 | get_gdb_index_contents_ftype; |
2803 | typedef gdb::function_view | |
2804 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
2805 | get_gdb_index_contents_dwz_ftype; | |
2806 | ||
927aa2e7 | 2807 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
2808 | elements of all the CUs and return 1. Otherwise, return 0. */ |
2809 | ||
2810 | static int | |
4485a1c1 | 2811 | dwarf2_read_gdb_index |
976ca316 | 2812 | (dwarf2_per_objfile *per_objfile, |
4485a1c1 SM |
2813 | get_gdb_index_contents_ftype get_gdb_index_contents, |
2814 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 2815 | { |
2ec9a5e0 TT |
2816 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
2817 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 2818 | struct dwz_file *dwz; |
976ca316 | 2819 | struct objfile *objfile = per_objfile->objfile; |
f8c41851 | 2820 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
2ec9a5e0 | 2821 | |
4485a1c1 | 2822 | gdb::array_view<const gdb_byte> main_index_contents |
f8c41851 | 2823 | = get_gdb_index_contents (objfile, per_bfd); |
4485a1c1 SM |
2824 | |
2825 | if (main_index_contents.empty ()) | |
2826 | return 0; | |
2827 | ||
3063847f | 2828 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
3810f182 | 2829 | if (!read_gdb_index_from_buffer (objfile_name (objfile), |
4485a1c1 SM |
2830 | use_deprecated_index_sections, |
2831 | main_index_contents, map.get (), &cu_list, | |
2832 | &cu_list_elements, &types_list, | |
2833 | &types_list_elements)) | |
2ec9a5e0 TT |
2834 | return 0; |
2835 | ||
0fefef59 | 2836 | /* Don't use the index if it's empty. */ |
3063847f | 2837 | if (map->symbol_table.empty ()) |
0fefef59 DE |
2838 | return 0; |
2839 | ||
2ec9a5e0 TT |
2840 | /* If there is a .dwz file, read it so we can get its CU list as |
2841 | well. */ | |
f8c41851 | 2842 | dwz = dwarf2_get_dwz_file (per_bfd); |
4db1a1dc | 2843 | if (dwz != NULL) |
2ec9a5e0 | 2844 | { |
2ec9a5e0 TT |
2845 | struct mapped_index dwz_map; |
2846 | const gdb_byte *dwz_types_ignore; | |
2847 | offset_type dwz_types_elements_ignore; | |
2848 | ||
4485a1c1 SM |
2849 | gdb::array_view<const gdb_byte> dwz_index_content |
2850 | = get_gdb_index_contents_dwz (objfile, dwz); | |
2851 | ||
2852 | if (dwz_index_content.empty ()) | |
2853 | return 0; | |
2854 | ||
3810f182 | 2855 | if (!read_gdb_index_from_buffer (bfd_get_filename (dwz->dwz_bfd.get ()), |
00f93c44 | 2856 | 1, dwz_index_content, &dwz_map, |
4485a1c1 SM |
2857 | &dwz_list, &dwz_list_elements, |
2858 | &dwz_types_ignore, | |
2859 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
2860 | { |
2861 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 2862 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
2863 | return 0; |
2864 | } | |
2865 | } | |
2866 | ||
f8c41851 SM |
2867 | create_cus_from_index (per_bfd, cu_list, cu_list_elements, dwz_list, |
2868 | dwz_list_elements); | |
1fd400ff | 2869 | |
8b70b953 TT |
2870 | if (types_list_elements) |
2871 | { | |
8b70b953 TT |
2872 | /* We can only handle a single .debug_types when we have an |
2873 | index. */ | |
f8c41851 | 2874 | if (per_bfd->types.size () != 1) |
8b70b953 TT |
2875 | return 0; |
2876 | ||
f8c41851 | 2877 | dwarf2_section_info *section = &per_bfd->types[0]; |
8b70b953 | 2878 | |
f8c41851 | 2879 | create_signatured_type_table_from_index (per_bfd, section, types_list, |
168c9250 | 2880 | types_list_elements); |
8b70b953 | 2881 | } |
9291a0cd | 2882 | |
976ca316 | 2883 | create_addrmap_from_index (per_objfile, map.get ()); |
9291a0cd | 2884 | |
f8c41851 SM |
2885 | per_bfd->index_table = std::move (map); |
2886 | per_bfd->using_index = 1; | |
2887 | per_bfd->quick_file_names_table = | |
2888 | create_quick_file_names_table (per_bfd->all_comp_units.size ()); | |
2889 | ||
9291a0cd TT |
2890 | return 1; |
2891 | } | |
2892 | ||
dee91e82 | 2893 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2894 | |
dee91e82 DE |
2895 | static void |
2896 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
3e225074 | 2897 | struct die_info *comp_unit_die) |
9291a0cd | 2898 | { |
dee91e82 | 2899 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 2900 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
976ca316 | 2901 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
094b34ac | 2902 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 2903 | struct attribute *attr; |
7b9f3c50 DE |
2904 | void **slot; |
2905 | struct quick_file_names *qfn; | |
9291a0cd | 2906 | |
0186c6a7 DE |
2907 | gdb_assert (! this_cu->is_debug_types); |
2908 | ||
07261596 TT |
2909 | /* Our callers never want to match partial units -- instead they |
2910 | will match the enclosing full CU. */ | |
2911 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2912 | { | |
2913 | this_cu->v.quick->no_file_data = 1; | |
2914 | return; | |
2915 | } | |
2916 | ||
0186c6a7 | 2917 | lh_cu = this_cu; |
7b9f3c50 | 2918 | slot = NULL; |
dee91e82 | 2919 | |
fff8551c | 2920 | line_header_up lh; |
9c541725 | 2921 | sect_offset line_offset {}; |
fff8551c | 2922 | |
dee91e82 | 2923 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
d4df075e | 2924 | if (attr != nullptr && attr->form_is_unsigned ()) |
9291a0cd | 2925 | { |
7b9f3c50 DE |
2926 | struct quick_file_names find_entry; |
2927 | ||
d4df075e | 2928 | line_offset = (sect_offset) attr->as_unsigned (); |
7b9f3c50 DE |
2929 | |
2930 | /* We may have already read in this line header (TU line header sharing). | |
2931 | If we have we're done. */ | |
094b34ac | 2932 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 2933 | find_entry.hash.line_sect_off = line_offset; |
976ca316 | 2934 | slot = htab_find_slot (per_objfile->per_bfd->quick_file_names_table.get (), |
7b9f3c50 DE |
2935 | &find_entry, INSERT); |
2936 | if (*slot != NULL) | |
2937 | { | |
9a3c8263 | 2938 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 2939 | return; |
7b9f3c50 DE |
2940 | } |
2941 | ||
3019eac3 | 2942 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2943 | } |
2944 | if (lh == NULL) | |
2945 | { | |
094b34ac | 2946 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2947 | return; |
9291a0cd TT |
2948 | } |
2949 | ||
976ca316 | 2950 | qfn = XOBNEW (&per_objfile->per_bfd->obstack, struct quick_file_names); |
094b34ac | 2951 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 2952 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
2953 | gdb_assert (slot != NULL); |
2954 | *slot = qfn; | |
9291a0cd | 2955 | |
d721ba37 | 2956 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 2957 | |
aa391654 TT |
2958 | int offset = 0; |
2959 | if (strcmp (fnd.name, "<unknown>") != 0) | |
2960 | ++offset; | |
2961 | ||
7ba99d21 | 2962 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 2963 | qfn->file_names = |
976ca316 | 2964 | XOBNEWVEC (&per_objfile->per_bfd->obstack, const char *, |
45940949 | 2965 | qfn->num_file_names); |
aa391654 TT |
2966 | if (offset != 0) |
2967 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 2968 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
2969 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
2970 | fnd.comp_dir).release (); | |
7b9f3c50 | 2971 | qfn->real_names = NULL; |
9291a0cd | 2972 | |
094b34ac | 2973 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2974 | } |
2975 | ||
2976 | /* A helper for the "quick" functions which attempts to read the line | |
2977 | table for THIS_CU. */ | |
2978 | ||
2979 | static struct quick_file_names * | |
ab432490 SM |
2980 | dw2_get_file_names (dwarf2_per_cu_data *this_cu, |
2981 | dwarf2_per_objfile *per_objfile) | |
dee91e82 | 2982 | { |
0186c6a7 DE |
2983 | /* This should never be called for TUs. */ |
2984 | gdb_assert (! this_cu->is_debug_types); | |
2985 | /* Nor type unit groups. */ | |
197400e8 | 2986 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 2987 | |
dee91e82 DE |
2988 | if (this_cu->v.quick->file_names != NULL) |
2989 | return this_cu->v.quick->file_names; | |
2990 | /* If we know there is no line data, no point in looking again. */ | |
2991 | if (this_cu->v.quick->no_file_data) | |
2992 | return NULL; | |
2993 | ||
ab432490 | 2994 | cutu_reader reader (this_cu, per_objfile); |
c0ab21c2 | 2995 | if (!reader.dummy_p) |
eb5dd737 | 2996 | dw2_get_file_names_reader (&reader, reader.comp_unit_die); |
dee91e82 DE |
2997 | |
2998 | if (this_cu->v.quick->no_file_data) | |
2999 | return NULL; | |
3000 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3001 | } |
3002 | ||
3003 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3004 | real path for a given file name from the line table. */ |
2fdf6df6 | 3005 | |
9291a0cd | 3006 | static const char * |
976ca316 | 3007 | dw2_get_real_path (dwarf2_per_objfile *per_objfile, |
7b9f3c50 | 3008 | struct quick_file_names *qfn, int index) |
9291a0cd | 3009 | { |
7b9f3c50 | 3010 | if (qfn->real_names == NULL) |
976ca316 | 3011 | qfn->real_names = OBSTACK_CALLOC (&per_objfile->per_bfd->obstack, |
26f2dc30 | 3012 | qfn->num_file_names, const char *); |
9291a0cd | 3013 | |
7b9f3c50 | 3014 | if (qfn->real_names[index] == NULL) |
14278e1f | 3015 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3016 | |
7b9f3c50 | 3017 | return qfn->real_names[index]; |
9291a0cd TT |
3018 | } |
3019 | ||
39298a5d TT |
3020 | struct symtab * |
3021 | dwarf2_base_index_functions::find_last_source_symtab (struct objfile *objfile) | |
9291a0cd | 3022 | { |
976ca316 | 3023 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
0d305d5c TT |
3024 | dwarf2_per_cu_data *dwarf_cu |
3025 | = per_objfile->per_bfd->all_comp_units.back ().get (); | |
976ca316 | 3026 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, per_objfile, false); |
ae2de4f8 | 3027 | |
43f3e411 DE |
3028 | if (cust == NULL) |
3029 | return NULL; | |
ed2dc618 | 3030 | |
43f3e411 | 3031 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3032 | } |
3033 | ||
7b9f3c50 DE |
3034 | /* Traversal function for dw2_forget_cached_source_info. */ |
3035 | ||
3036 | static int | |
3037 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3038 | { |
7b9f3c50 | 3039 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3040 | |
7b9f3c50 | 3041 | if (file_data->real_names) |
9291a0cd | 3042 | { |
7b9f3c50 | 3043 | int i; |
9291a0cd | 3044 | |
7b9f3c50 | 3045 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3046 | { |
7b9f3c50 DE |
3047 | xfree ((void*) file_data->real_names[i]); |
3048 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3049 | } |
3050 | } | |
7b9f3c50 DE |
3051 | |
3052 | return 1; | |
3053 | } | |
3054 | ||
39298a5d TT |
3055 | void |
3056 | dwarf2_base_index_functions::forget_cached_source_info | |
3057 | (struct objfile *objfile) | |
7b9f3c50 | 3058 | { |
976ca316 | 3059 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
7b9f3c50 | 3060 | |
976ca316 | 3061 | htab_traverse_noresize (per_objfile->per_bfd->quick_file_names_table.get (), |
7b9f3c50 | 3062 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3063 | } |
3064 | ||
da51c347 DE |
3065 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3066 | ||
3067 | struct dw2_symtab_iterator | |
9291a0cd | 3068 | { |
ed2dc618 | 3069 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
976ca316 | 3070 | dwarf2_per_objfile *per_objfile; |
2b79f376 SM |
3071 | /* If set, only look for symbols that match that block. Valid values are |
3072 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3073 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3074 | /* The kind of symbol we're looking for. */ |
3075 | domain_enum domain; | |
3076 | /* The list of CUs from the index entry of the symbol, | |
3077 | or NULL if not found. */ | |
42c2c694 | 3078 | offset_view vec; |
da51c347 DE |
3079 | /* The next element in VEC to look at. */ |
3080 | int next; | |
3081 | /* The number of elements in VEC, or zero if there is no match. */ | |
3082 | int length; | |
8943b874 DE |
3083 | /* Have we seen a global version of the symbol? |
3084 | If so we can ignore all further global instances. | |
3085 | This is to work around gold/15646, inefficient gold-generated | |
3086 | indices. */ | |
3087 | int global_seen; | |
da51c347 | 3088 | }; |
9291a0cd | 3089 | |
7089bd88 | 3090 | /* Initialize the index symtab iterator ITER, offset_type NAMEI variant. */ |
2fdf6df6 | 3091 | |
9291a0cd | 3092 | static void |
7089bd88 TT |
3093 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3094 | dwarf2_per_objfile *per_objfile, | |
3095 | gdb::optional<block_enum> block_index, | |
3096 | domain_enum domain, offset_type namei) | |
da51c347 | 3097 | { |
976ca316 | 3098 | iter->per_objfile = per_objfile; |
da51c347 DE |
3099 | iter->block_index = block_index; |
3100 | iter->domain = domain; | |
3101 | iter->next = 0; | |
8943b874 | 3102 | iter->global_seen = 0; |
42c2c694 | 3103 | iter->vec = {}; |
e5f3ece2 | 3104 | iter->length = 0; |
e5f3ece2 TV |
3105 | |
3106 | mapped_index *index = per_objfile->per_bfd->index_table.get (); | |
3107 | /* index is NULL if OBJF_READNOW. */ | |
3108 | if (index == NULL) | |
3109 | return; | |
3110 | ||
3111 | gdb_assert (!index->symbol_name_slot_invalid (namei)); | |
42c2c694 | 3112 | offset_type vec_idx = index->symbol_vec_index (namei); |
e5f3ece2 | 3113 | |
42c2c694 TT |
3114 | iter->vec = offset_view (index->constant_pool.slice (vec_idx)); |
3115 | iter->length = iter->vec[0]; | |
da51c347 DE |
3116 | } |
3117 | ||
3118 | /* Return the next matching CU or NULL if there are no more. */ | |
3119 | ||
3120 | static struct dwarf2_per_cu_data * | |
3121 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3122 | { | |
976ca316 | 3123 | dwarf2_per_objfile *per_objfile = iter->per_objfile; |
ed2dc618 | 3124 | |
da51c347 DE |
3125 | for ( ; iter->next < iter->length; ++iter->next) |
3126 | { | |
42c2c694 | 3127 | offset_type cu_index_and_attrs = iter->vec[iter->next + 1]; |
da51c347 | 3128 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
da51c347 DE |
3129 | gdb_index_symbol_kind symbol_kind = |
3130 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3131 | /* Only check the symbol attributes if they're present. | |
3132 | Indices prior to version 7 don't record them, | |
3133 | and indices >= 7 may elide them for certain symbols | |
3134 | (gold does this). */ | |
3135 | int attrs_valid = | |
976ca316 | 3136 | (per_objfile->per_bfd->index_table->version >= 7 |
da51c347 DE |
3137 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3138 | ||
3190f0c6 | 3139 | /* Don't crash on bad data. */ |
91eea9cc | 3140 | if (cu_index >= per_objfile->per_bfd->all_comp_units.size ()) |
3190f0c6 | 3141 | { |
b98664d3 | 3142 | complaint (_(".gdb_index entry has bad CU index" |
976ca316 | 3143 | " [in module %s]"), objfile_name (per_objfile->objfile)); |
3190f0c6 DE |
3144 | continue; |
3145 | } | |
3146 | ||
91eea9cc | 3147 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (cu_index); |
3190f0c6 | 3148 | |
da51c347 | 3149 | /* Skip if already read in. */ |
976ca316 | 3150 | if (per_objfile->symtab_set_p (per_cu)) |
da51c347 DE |
3151 | continue; |
3152 | ||
8943b874 DE |
3153 | /* Check static vs global. */ |
3154 | if (attrs_valid) | |
3155 | { | |
2b79f376 SM |
3156 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3157 | ||
3158 | if (iter->block_index.has_value ()) | |
3159 | { | |
3160 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3161 | ||
3162 | if (is_static != want_static) | |
3163 | continue; | |
3164 | } | |
3165 | ||
8943b874 | 3166 | /* Work around gold/15646. */ |
f030440d TV |
3167 | if (!is_static |
3168 | && symbol_kind == GDB_INDEX_SYMBOL_KIND_TYPE) | |
3169 | { | |
3170 | if (iter->global_seen) | |
3171 | continue; | |
3172 | ||
3173 | iter->global_seen = 1; | |
3174 | } | |
8943b874 | 3175 | } |
da51c347 DE |
3176 | |
3177 | /* Only check the symbol's kind if it has one. */ | |
3178 | if (attrs_valid) | |
3179 | { | |
3180 | switch (iter->domain) | |
3181 | { | |
3182 | case VAR_DOMAIN: | |
3183 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3184 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3185 | /* Some types are also in VAR_DOMAIN. */ | |
3186 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3187 | continue; | |
3188 | break; | |
3189 | case STRUCT_DOMAIN: | |
3190 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3191 | continue; | |
3192 | break; | |
3193 | case LABEL_DOMAIN: | |
3194 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3195 | continue; | |
3196 | break; | |
59c35742 AB |
3197 | case MODULE_DOMAIN: |
3198 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3199 | continue; | |
3200 | break; | |
da51c347 DE |
3201 | default: |
3202 | break; | |
3203 | } | |
3204 | } | |
3205 | ||
3206 | ++iter->next; | |
3207 | return per_cu; | |
3208 | } | |
3209 | ||
3210 | return NULL; | |
3211 | } | |
3212 | ||
39298a5d | 3213 | void |
4829711b TT |
3214 | dwarf2_base_index_functions::print_stats (struct objfile *objfile, |
3215 | bool print_bcache) | |
9291a0cd | 3216 | { |
4829711b TT |
3217 | if (print_bcache) |
3218 | return; | |
3219 | ||
976ca316 | 3220 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
91eea9cc | 3221 | int total = per_objfile->per_bfd->all_comp_units.size (); |
ed2dc618 | 3222 | int count = 0; |
9291a0cd | 3223 | |
ed2dc618 | 3224 | for (int i = 0; i < total; ++i) |
9291a0cd | 3225 | { |
91eea9cc | 3226 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (i); |
9291a0cd | 3227 | |
976ca316 | 3228 | if (!per_objfile->symtab_set_p (per_cu)) |
9291a0cd TT |
3229 | ++count; |
3230 | } | |
e4a48d9d | 3231 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3232 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3233 | } | |
3234 | ||
779bd270 DE |
3235 | /* This dumps minimal information about the index. |
3236 | It is called via "mt print objfiles". | |
3237 | One use is to verify .gdb_index has been loaded by the | |
3238 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3239 | ||
39298a5d TT |
3240 | void |
3241 | dwarf2_gdb_index::dump (struct objfile *objfile) | |
9291a0cd | 3242 | { |
976ca316 | 3243 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 3244 | |
976ca316 | 3245 | gdb_assert (per_objfile->per_bfd->using_index); |
779bd270 | 3246 | printf_filtered (".gdb_index:"); |
976ca316 | 3247 | if (per_objfile->per_bfd->index_table != NULL) |
779bd270 DE |
3248 | { |
3249 | printf_filtered (" version %d\n", | |
976ca316 | 3250 | per_objfile->per_bfd->index_table->version); |
779bd270 DE |
3251 | } |
3252 | else | |
3253 | printf_filtered (" faked for \"readnow\"\n"); | |
3254 | printf_filtered ("\n"); | |
9291a0cd TT |
3255 | } |
3256 | ||
39298a5d TT |
3257 | void |
3258 | dwarf2_base_index_functions::expand_all_symtabs (struct objfile *objfile) | |
9291a0cd | 3259 | { |
976ca316 | 3260 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
91eea9cc | 3261 | int total_units = per_objfile->per_bfd->all_comp_units.size (); |
9291a0cd | 3262 | |
ed2dc618 | 3263 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3264 | { |
91eea9cc | 3265 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (i); |
9291a0cd | 3266 | |
58f0c718 TT |
3267 | /* We don't want to directly expand a partial CU, because if we |
3268 | read it with the wrong language, then assertion failures can | |
3269 | be triggered later on. See PR symtab/23010. So, tell | |
3270 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3271 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
976ca316 | 3272 | dw2_instantiate_symtab (per_cu, per_objfile, true); |
9291a0cd TT |
3273 | } |
3274 | } | |
3275 | ||
df35e626 | 3276 | static bool |
9a0bacfb TV |
3277 | dw2_expand_symtabs_matching_symbol |
3278 | (mapped_index_base &index, | |
3279 | const lookup_name_info &lookup_name_in, | |
3280 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
fcf23d5b SM |
3281 | gdb::function_view<bool (offset_type)> match_callback, |
3282 | dwarf2_per_objfile *per_objfile); | |
9a0bacfb | 3283 | |
df35e626 | 3284 | static bool |
9a0bacfb | 3285 | dw2_expand_symtabs_matching_one |
97a1449a SM |
3286 | (dwarf2_per_cu_data *per_cu, |
3287 | dwarf2_per_objfile *per_objfile, | |
9a0bacfb TV |
3288 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
3289 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify); | |
3290 | ||
af82f89d | 3291 | void |
0b7b2c2a | 3292 | dwarf2_gdb_index::expand_matching_symbols |
199b4314 | 3293 | (struct objfile *objfile, |
b054970d | 3294 | const lookup_name_info &name, domain_enum domain, |
199b4314 | 3295 | int global, |
199b4314 | 3296 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3297 | { |
1aa98955 | 3298 | /* Used for Ada. */ |
976ca316 | 3299 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
1aa98955 | 3300 | |
9a0bacfb TV |
3301 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; |
3302 | ||
976ca316 | 3303 | if (per_objfile->per_bfd->index_table != nullptr) |
1aa98955 | 3304 | { |
976ca316 | 3305 | mapped_index &index = *per_objfile->per_bfd->index_table; |
1aa98955 | 3306 | |
9a0bacfb TV |
3307 | const char *match_name = name.ada ().lookup_name ().c_str (); |
3308 | auto matcher = [&] (const char *symname) | |
3309 | { | |
3310 | if (ordered_compare == nullptr) | |
3311 | return true; | |
3312 | return ordered_compare (symname, match_name) == 0; | |
3313 | }; | |
3314 | ||
b64f703b | 3315 | dw2_expand_symtabs_matching_symbol (index, name, matcher, |
9a0bacfb TV |
3316 | [&] (offset_type namei) |
3317 | { | |
3318 | struct dw2_symtab_iterator iter; | |
3319 | struct dwarf2_per_cu_data *per_cu; | |
3320 | ||
976ca316 | 3321 | dw2_symtab_iter_init (&iter, per_objfile, block_kind, domain, |
e5f3ece2 | 3322 | namei); |
9a0bacfb | 3323 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
976ca316 | 3324 | dw2_expand_symtabs_matching_one (per_cu, per_objfile, nullptr, |
97a1449a | 3325 | nullptr); |
9a0bacfb | 3326 | return true; |
976ca316 | 3327 | }, per_objfile); |
9a0bacfb TV |
3328 | } |
3329 | else | |
3330 | { | |
3331 | /* We have -readnow: no .gdb_index, but no partial symtabs either. So, | |
3332 | proceed assuming all symtabs have been read in. */ | |
3333 | } | |
9291a0cd TT |
3334 | } |
3335 | ||
e1ef7d7a PA |
3336 | /* Starting from a search name, return the string that finds the upper |
3337 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3338 | list. Returns the empty string to indicate that the upper bound is | |
3339 | the end of the list. */ | |
3340 | ||
3341 | static std::string | |
3342 | make_sort_after_prefix_name (const char *search_name) | |
3343 | { | |
3344 | /* When looking to complete "func", we find the upper bound of all | |
3345 | symbols that start with "func" by looking for where we'd insert | |
3346 | the closest string that would follow "func" in lexicographical | |
3347 | order. Usually, that's "func"-with-last-character-incremented, | |
3348 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3349 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3350 | Especially mind the 0xff character, which is a valid character in | |
3351 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3352 | rule out compilers allowing it in identifiers. Note that | |
3353 | conveniently, strcmp/strcasecmp are specified to compare | |
3354 | characters interpreted as unsigned char. So what we do is treat | |
3355 | the whole string as a base 256 number composed of a sequence of | |
3356 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3357 | to 0, and carries 1 to the following more-significant position. | |
3358 | If the very first character in SEARCH_NAME ends up incremented | |
3359 | and carries/overflows, then the upper bound is the end of the | |
3360 | list. The string after the empty string is also the empty | |
3361 | string. | |
3362 | ||
3363 | Some examples of this operation: | |
3364 | ||
3365 | SEARCH_NAME => "+1" RESULT | |
3366 | ||
3367 | "abc" => "abd" | |
3368 | "ab\xff" => "ac" | |
3369 | "\xff" "a" "\xff" => "\xff" "b" | |
3370 | "\xff" => "" | |
3371 | "\xff\xff" => "" | |
3372 | "" => "" | |
3373 | ||
3374 | Then, with these symbols for example: | |
3375 | ||
3376 | func | |
3377 | func1 | |
3378 | fund | |
3379 | ||
3380 | completing "func" looks for symbols between "func" and | |
3381 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3382 | which finds "func" and "func1", but not "fund". | |
3383 | ||
3384 | And with: | |
3385 | ||
3386 | funcÿ (Latin1 'ÿ' [0xff]) | |
3387 | funcÿ1 | |
3388 | fund | |
3389 | ||
3390 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3391 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3392 | ||
3393 | And with: | |
3394 | ||
3395 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3396 | ÿÿ1 | |
3397 | ||
3398 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3399 | the end of the list. | |
3400 | */ | |
3401 | std::string after = search_name; | |
3402 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3403 | after.pop_back (); | |
3404 | if (!after.empty ()) | |
3405 | after.back () = (unsigned char) after.back () + 1; | |
3406 | return after; | |
3407 | } | |
3408 | ||
5c58de74 | 3409 | /* See declaration. */ |
61d96d7e | 3410 | |
5c58de74 PA |
3411 | std::pair<std::vector<name_component>::const_iterator, |
3412 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3413 | mapped_index_base::find_name_components_bounds |
fcf23d5b SM |
3414 | (const lookup_name_info &lookup_name_without_params, language lang, |
3415 | dwarf2_per_objfile *per_objfile) const | |
3f563c84 | 3416 | { |
5c58de74 PA |
3417 | auto *name_cmp |
3418 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3419 | |
3b00ef10 | 3420 | const char *lang_name |
e0802d59 | 3421 | = lookup_name_without_params.language_lookup_name (lang); |
9291a0cd | 3422 | |
3f563c84 PA |
3423 | /* Comparison function object for lower_bound that matches against a |
3424 | given symbol name. */ | |
3425 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3426 | const char *name) | |
3427 | { | |
fcf23d5b | 3428 | const char *elem_qualified = this->symbol_name_at (elem.idx, per_objfile); |
3f563c84 PA |
3429 | const char *elem_name = elem_qualified + elem.name_offset; |
3430 | return name_cmp (elem_name, name) < 0; | |
3431 | }; | |
3432 | ||
3433 | /* Comparison function object for upper_bound that matches against a | |
3434 | given symbol name. */ | |
3435 | auto lookup_compare_upper = [&] (const char *name, | |
3436 | const name_component &elem) | |
3437 | { | |
fcf23d5b | 3438 | const char *elem_qualified = this->symbol_name_at (elem.idx, per_objfile); |
3f563c84 PA |
3439 | const char *elem_name = elem_qualified + elem.name_offset; |
3440 | return name_cmp (name, elem_name) < 0; | |
3441 | }; | |
3442 | ||
5c58de74 PA |
3443 | auto begin = this->name_components.begin (); |
3444 | auto end = this->name_components.end (); | |
3f563c84 PA |
3445 | |
3446 | /* Find the lower bound. */ | |
3447 | auto lower = [&] () | |
3448 | { | |
3b00ef10 | 3449 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3450 | return begin; |
3451 | else | |
3b00ef10 | 3452 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3453 | } (); |
3454 | ||
3455 | /* Find the upper bound. */ | |
3456 | auto upper = [&] () | |
3457 | { | |
5c58de74 | 3458 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3459 | { |
e1ef7d7a PA |
3460 | /* In completion mode, we want UPPER to point past all |
3461 | symbols names that have the same prefix. I.e., with | |
3462 | these symbols, and completing "func": | |
3463 | ||
3464 | function << lower bound | |
3465 | function1 | |
3466 | other_function << upper bound | |
3467 | ||
3468 | We find the upper bound by looking for the insertion | |
3469 | point of "func"-with-last-character-incremented, | |
3470 | i.e. "fund". */ | |
3b00ef10 | 3471 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3472 | if (after.empty ()) |
3f563c84 | 3473 | return end; |
e6b2f5ef PA |
3474 | return std::lower_bound (lower, end, after.c_str (), |
3475 | lookup_compare_lower); | |
3f563c84 PA |
3476 | } |
3477 | else | |
3b00ef10 | 3478 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3479 | } (); |
3480 | ||
5c58de74 PA |
3481 | return {lower, upper}; |
3482 | } | |
3483 | ||
3484 | /* See declaration. */ | |
3485 | ||
3486 | void | |
fcf23d5b | 3487 | mapped_index_base::build_name_components (dwarf2_per_objfile *per_objfile) |
5c58de74 PA |
3488 | { |
3489 | if (!this->name_components.empty ()) | |
3490 | return; | |
3491 | ||
3492 | this->name_components_casing = case_sensitivity; | |
3493 | auto *name_cmp | |
3494 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3495 | ||
3496 | /* The code below only knows how to break apart components of C++ | |
3497 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3498 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3499 | auto count = this->symbol_name_count (); |
3500 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3501 | { |
44ed8f3e | 3502 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3503 | continue; |
3504 | ||
fcf23d5b | 3505 | const char *name = this->symbol_name_at (idx, per_objfile); |
5c58de74 PA |
3506 | |
3507 | /* Add each name component to the name component table. */ | |
3508 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3509 | |
3510 | if (strstr (name, "::") != nullptr) | |
3511 | { | |
3512 | for (unsigned int current_len = cp_find_first_component (name); | |
3513 | name[current_len] != '\0'; | |
3514 | current_len += cp_find_first_component (name + current_len)) | |
3515 | { | |
3516 | gdb_assert (name[current_len] == ':'); | |
3517 | this->name_components.push_back ({previous_len, idx}); | |
3518 | /* Skip the '::'. */ | |
3519 | current_len += 2; | |
3520 | previous_len = current_len; | |
3521 | } | |
3522 | } | |
3523 | else | |
5c58de74 | 3524 | { |
3b00ef10 TT |
3525 | /* Handle the Ada encoded (aka mangled) form here. */ |
3526 | for (const char *iter = strstr (name, "__"); | |
3527 | iter != nullptr; | |
3528 | iter = strstr (iter, "__")) | |
3529 | { | |
3530 | this->name_components.push_back ({previous_len, idx}); | |
3531 | iter += 2; | |
3532 | previous_len = iter - name; | |
3533 | } | |
5c58de74 | 3534 | } |
3b00ef10 | 3535 | |
5c58de74 PA |
3536 | this->name_components.push_back ({previous_len, idx}); |
3537 | } | |
3538 | ||
3539 | /* Sort name_components elements by name. */ | |
3540 | auto name_comp_compare = [&] (const name_component &left, | |
3541 | const name_component &right) | |
3542 | { | |
fcf23d5b SM |
3543 | const char *left_qualified |
3544 | = this->symbol_name_at (left.idx, per_objfile); | |
3545 | const char *right_qualified | |
3546 | = this->symbol_name_at (right.idx, per_objfile); | |
5c58de74 PA |
3547 | |
3548 | const char *left_name = left_qualified + left.name_offset; | |
3549 | const char *right_name = right_qualified + right.name_offset; | |
3550 | ||
3551 | return name_cmp (left_name, right_name) < 0; | |
3552 | }; | |
3553 | ||
3554 | std::sort (this->name_components.begin (), | |
3555 | this->name_components.end (), | |
3556 | name_comp_compare); | |
3557 | } | |
3558 | ||
3559 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3560 | mapped_index_base instead of the containing objfile. This is split |
3561 | to a separate function in order to be able to unit test the | |
3562 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3563 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3564 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 | 3565 | |
df35e626 | 3566 | static bool |
5c58de74 | 3567 | dw2_expand_symtabs_matching_symbol |
44ed8f3e | 3568 | (mapped_index_base &index, |
5c58de74 PA |
3569 | const lookup_name_info &lookup_name_in, |
3570 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
fcf23d5b SM |
3571 | gdb::function_view<bool (offset_type)> match_callback, |
3572 | dwarf2_per_objfile *per_objfile) | |
5c58de74 PA |
3573 | { |
3574 | lookup_name_info lookup_name_without_params | |
3575 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3576 | |
3577 | /* Build the symbol name component sorted vector, if we haven't | |
3578 | yet. */ | |
fcf23d5b | 3579 | index.build_name_components (per_objfile); |
5c58de74 | 3580 | |
3f563c84 PA |
3581 | /* The same symbol may appear more than once in the range though. |
3582 | E.g., if we're looking for symbols that complete "w", and we have | |
3583 | a symbol named "w1::w2", we'll find the two name components for | |
3584 | that same symbol in the range. To be sure we only call the | |
3585 | callback once per symbol, we first collect the symbol name | |
3586 | indexes that matched in a temporary vector and ignore | |
3587 | duplicates. */ | |
3588 | std::vector<offset_type> matches; | |
3f563c84 | 3589 | |
3b00ef10 TT |
3590 | struct name_and_matcher |
3591 | { | |
3592 | symbol_name_matcher_ftype *matcher; | |
ecc6c606 | 3593 | const char *name; |
3b00ef10 TT |
3594 | |
3595 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3596 | { |
ecc6c606 | 3597 | return matcher == other.matcher && strcmp (name, other.name) == 0; |
3b00ef10 TT |
3598 | } |
3599 | }; | |
3600 | ||
3601 | /* A vector holding all the different symbol name matchers, for all | |
3602 | languages. */ | |
3603 | std::vector<name_and_matcher> matchers; | |
3604 | ||
3605 | for (int i = 0; i < nr_languages; i++) | |
3606 | { | |
3607 | enum language lang_e = (enum language) i; | |
3608 | ||
3609 | const language_defn *lang = language_def (lang_e); | |
3610 | symbol_name_matcher_ftype *name_matcher | |
c9debfb9 | 3611 | = lang->get_symbol_name_matcher (lookup_name_without_params); |
3f563c84 | 3612 | |
3b00ef10 | 3613 | name_and_matcher key { |
dda83cd7 | 3614 | name_matcher, |
3b00ef10 TT |
3615 | lookup_name_without_params.language_lookup_name (lang_e) |
3616 | }; | |
3617 | ||
3618 | /* Don't insert the same comparison routine more than once. | |
3619 | Note that we do this linear walk. This is not a problem in | |
3620 | practice because the number of supported languages is | |
3621 | low. */ | |
3622 | if (std::find (matchers.begin (), matchers.end (), key) | |
3623 | != matchers.end ()) | |
9291a0cd | 3624 | continue; |
3b00ef10 TT |
3625 | matchers.push_back (std::move (key)); |
3626 | ||
3627 | auto bounds | |
3628 | = index.find_name_components_bounds (lookup_name_without_params, | |
fcf23d5b | 3629 | lang_e, per_objfile); |
3b00ef10 TT |
3630 | |
3631 | /* Now for each symbol name in range, check to see if we have a name | |
3632 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3633 | ||
3634 | for (; bounds.first != bounds.second; ++bounds.first) | |
3635 | { | |
fcf23d5b SM |
3636 | const char *qualified |
3637 | = index.symbol_name_at (bounds.first->idx, per_objfile); | |
3b00ef10 TT |
3638 | |
3639 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3640 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3641 | continue; | |
9291a0cd | 3642 | |
3b00ef10 TT |
3643 | matches.push_back (bounds.first->idx); |
3644 | } | |
3f563c84 PA |
3645 | } |
3646 | ||
3647 | std::sort (matches.begin (), matches.end ()); | |
3648 | ||
3649 | /* Finally call the callback, once per match. */ | |
3650 | ULONGEST prev = -1; | |
df35e626 | 3651 | bool result = true; |
3f563c84 PA |
3652 | for (offset_type idx : matches) |
3653 | { | |
3654 | if (prev != idx) | |
3655 | { | |
3b00ef10 | 3656 | if (!match_callback (idx)) |
df35e626 TT |
3657 | { |
3658 | result = false; | |
3659 | break; | |
3660 | } | |
3f563c84 PA |
3661 | prev = idx; |
3662 | } | |
3663 | } | |
3664 | ||
3665 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
3666 | (offset_type)-1 are both possible values. */ | |
3667 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
df35e626 TT |
3668 | |
3669 | return result; | |
3f563c84 PA |
3670 | } |
3671 | ||
c62446b1 PA |
3672 | #if GDB_SELF_TEST |
3673 | ||
3674 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
3675 | ||
a3c5fafd PA |
3676 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
3677 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
3678 | mapped_index_base interface. Builds an index from the symbol list | |
3679 | passed as parameter to the constructor. */ | |
3680 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
3681 | { |
3682 | public: | |
a3c5fafd PA |
3683 | mock_mapped_index (gdb::array_view<const char *> symbols) |
3684 | : m_symbol_table (symbols) | |
c62446b1 PA |
3685 | {} |
3686 | ||
a3c5fafd | 3687 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 3688 | |
a3c5fafd | 3689 | /* Return the number of names in the symbol table. */ |
632e107b | 3690 | size_t symbol_name_count () const override |
c62446b1 | 3691 | { |
a3c5fafd | 3692 | return m_symbol_table.size (); |
c62446b1 PA |
3693 | } |
3694 | ||
a3c5fafd | 3695 | /* Get the name of the symbol at IDX in the symbol table. */ |
fcf23d5b SM |
3696 | const char *symbol_name_at |
3697 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
a3c5fafd PA |
3698 | { |
3699 | return m_symbol_table[idx]; | |
3700 | } | |
c62446b1 | 3701 | |
a3c5fafd PA |
3702 | private: |
3703 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
3704 | }; |
3705 | ||
3706 | /* Convenience function that converts a NULL pointer to a "<null>" | |
3707 | string, to pass to print routines. */ | |
3708 | ||
3709 | static const char * | |
3710 | string_or_null (const char *str) | |
3711 | { | |
3712 | return str != NULL ? str : "<null>"; | |
3713 | } | |
3714 | ||
3715 | /* Check if a lookup_name_info built from | |
3716 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
3717 | index. EXPECTED_LIST is the list of expected matches, in expected | |
3718 | matching order. If no match expected, then an empty list is | |
3719 | specified. Returns true on success. On failure prints a warning | |
3720 | indicating the file:line that failed, and returns false. */ | |
3721 | ||
3722 | static bool | |
3723 | check_match (const char *file, int line, | |
3724 | mock_mapped_index &mock_index, | |
3725 | const char *name, symbol_name_match_type match_type, | |
3726 | bool completion_mode, | |
fcf23d5b SM |
3727 | std::initializer_list<const char *> expected_list, |
3728 | dwarf2_per_objfile *per_objfile) | |
c62446b1 PA |
3729 | { |
3730 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
3731 | ||
3732 | bool matched = true; | |
3733 | ||
3734 | auto mismatch = [&] (const char *expected_str, | |
3735 | const char *got) | |
3736 | { | |
3737 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
3738 | "expected=\"%s\", got=\"%s\"\n"), | |
3739 | file, line, | |
3740 | (match_type == symbol_name_match_type::FULL | |
3741 | ? "FULL" : "WILD"), | |
3742 | name, string_or_null (expected_str), string_or_null (got)); | |
3743 | matched = false; | |
3744 | }; | |
3745 | ||
3746 | auto expected_it = expected_list.begin (); | |
3747 | auto expected_end = expected_list.end (); | |
3748 | ||
a3c5fafd | 3749 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
b64f703b | 3750 | nullptr, |
c62446b1 PA |
3751 | [&] (offset_type idx) |
3752 | { | |
fcf23d5b | 3753 | const char *matched_name = mock_index.symbol_name_at (idx, per_objfile); |
c62446b1 PA |
3754 | const char *expected_str |
3755 | = expected_it == expected_end ? NULL : *expected_it++; | |
3756 | ||
3757 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
3758 | mismatch (expected_str, matched_name); | |
3b00ef10 | 3759 | return true; |
fcf23d5b | 3760 | }, per_objfile); |
c62446b1 PA |
3761 | |
3762 | const char *expected_str | |
3763 | = expected_it == expected_end ? NULL : *expected_it++; | |
3764 | if (expected_str != NULL) | |
3765 | mismatch (expected_str, NULL); | |
3766 | ||
3767 | return matched; | |
3768 | } | |
3769 | ||
3770 | /* The symbols added to the mock mapped_index for testing (in | |
3771 | canonical form). */ | |
3772 | static const char *test_symbols[] = { | |
3773 | "function", | |
3774 | "std::bar", | |
3775 | "std::zfunction", | |
3776 | "std::zfunction2", | |
3777 | "w1::w2", | |
3778 | "ns::foo<char*>", | |
3779 | "ns::foo<int>", | |
3780 | "ns::foo<long>", | |
a20714ff PA |
3781 | "ns2::tmpl<int>::foo2", |
3782 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 3783 | |
e1ef7d7a PA |
3784 | /* These are used to check that the increment-last-char in the |
3785 | matching algorithm for completion doesn't match "t1_fund" when | |
3786 | completing "t1_func". */ | |
3787 | "t1_func", | |
3788 | "t1_func1", | |
3789 | "t1_fund", | |
3790 | "t1_fund1", | |
3791 | ||
3792 | /* A UTF-8 name with multi-byte sequences to make sure that | |
3793 | cp-name-parser understands this as a single identifier ("função" | |
3794 | is "function" in PT). */ | |
3795 | u8"u8função", | |
3796 | ||
3797 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
3798 | "yfunc\377", | |
3799 | ||
3800 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
3801 | "\377", | |
3802 | "\377\377123", | |
3803 | ||
c62446b1 PA |
3804 | /* A name with all sorts of complications. Starts with "z" to make |
3805 | it easier for the completion tests below. */ | |
3806 | #define Z_SYM_NAME \ | |
3807 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
3808 | "::tuple<(anonymous namespace)::ui*, " \ | |
3809 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
3810 | ||
3811 | Z_SYM_NAME | |
3812 | }; | |
3813 | ||
a3c5fafd PA |
3814 | /* Returns true if the mapped_index_base::find_name_component_bounds |
3815 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
3816 | in completion mode. */ | |
5c58de74 PA |
3817 | |
3818 | static bool | |
a3c5fafd | 3819 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 | 3820 | const char *search_name, |
fcf23d5b SM |
3821 | gdb::array_view<const char *> expected_syms, |
3822 | dwarf2_per_objfile *per_objfile) | |
5c58de74 PA |
3823 | { |
3824 | lookup_name_info lookup_name (search_name, | |
3825 | symbol_name_match_type::FULL, true); | |
3826 | ||
3b00ef10 | 3827 | auto bounds = index.find_name_components_bounds (lookup_name, |
fcf23d5b SM |
3828 | language_cplus, |
3829 | per_objfile); | |
5c58de74 PA |
3830 | |
3831 | size_t distance = std::distance (bounds.first, bounds.second); | |
3832 | if (distance != expected_syms.size ()) | |
3833 | return false; | |
3834 | ||
3835 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
3836 | { | |
3837 | auto nc_elem = bounds.first + exp_elem; | |
fcf23d5b | 3838 | const char *qualified = index.symbol_name_at (nc_elem->idx, per_objfile); |
5c58de74 PA |
3839 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) |
3840 | return false; | |
3841 | } | |
3842 | ||
3843 | return true; | |
3844 | } | |
3845 | ||
3846 | /* Test the lower-level mapped_index::find_name_component_bounds | |
3847 | method. */ | |
3848 | ||
c62446b1 | 3849 | static void |
5c58de74 PA |
3850 | test_mapped_index_find_name_component_bounds () |
3851 | { | |
3852 | mock_mapped_index mock_index (test_symbols); | |
3853 | ||
fcf23d5b | 3854 | mock_index.build_name_components (NULL /* per_objfile */); |
5c58de74 PA |
3855 | |
3856 | /* Test the lower-level mapped_index::find_name_component_bounds | |
3857 | method in completion mode. */ | |
3858 | { | |
3859 | static const char *expected_syms[] = { | |
3860 | "t1_func", | |
3861 | "t1_func1", | |
5c58de74 PA |
3862 | }; |
3863 | ||
fcf23d5b SM |
3864 | SELF_CHECK (check_find_bounds_finds |
3865 | (mock_index, "t1_func", expected_syms, | |
3866 | NULL /* per_objfile */)); | |
5c58de74 PA |
3867 | } |
3868 | ||
3869 | /* Check that the increment-last-char in the name matching algorithm | |
3870 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
3871 | { | |
3872 | static const char *expected_syms1[] = { | |
3873 | "\377", | |
3874 | "\377\377123", | |
3875 | }; | |
fcf23d5b SM |
3876 | SELF_CHECK (check_find_bounds_finds |
3877 | (mock_index, "\377", expected_syms1, NULL /* per_objfile */)); | |
5c58de74 PA |
3878 | |
3879 | static const char *expected_syms2[] = { | |
3880 | "\377\377123", | |
3881 | }; | |
fcf23d5b SM |
3882 | SELF_CHECK (check_find_bounds_finds |
3883 | (mock_index, "\377\377", expected_syms2, | |
3884 | NULL /* per_objfile */)); | |
5c58de74 PA |
3885 | } |
3886 | } | |
3887 | ||
3888 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
3889 | ||
3890 | static void | |
3891 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
3892 | { |
3893 | mock_mapped_index mock_index (test_symbols); | |
3894 | ||
3895 | /* We let all tests run until the end even if some fails, for debug | |
3896 | convenience. */ | |
3897 | bool any_mismatch = false; | |
3898 | ||
3899 | /* Create the expected symbols list (an initializer_list). Needed | |
3900 | because lists have commas, and we need to pass them to CHECK, | |
3901 | which is a macro. */ | |
3902 | #define EXPECT(...) { __VA_ARGS__ } | |
3903 | ||
3904 | /* Wrapper for check_match that passes down the current | |
3905 | __FILE__/__LINE__. */ | |
3906 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
3907 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
3908 | mock_index, \ | |
3909 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
fcf23d5b | 3910 | EXPECTED_LIST, NULL) |
c62446b1 PA |
3911 | |
3912 | /* Identity checks. */ | |
3913 | for (const char *sym : test_symbols) | |
3914 | { | |
3915 | /* Should be able to match all existing symbols. */ | |
3916 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
3917 | EXPECT (sym)); | |
3918 | ||
3919 | /* Should be able to match all existing symbols with | |
3920 | parameters. */ | |
3921 | std::string with_params = std::string (sym) + "(int)"; | |
3922 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3923 | EXPECT (sym)); | |
3924 | ||
3925 | /* Should be able to match all existing symbols with | |
3926 | parameters and qualifiers. */ | |
3927 | with_params = std::string (sym) + " ( int ) const"; | |
3928 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3929 | EXPECT (sym)); | |
3930 | ||
3931 | /* This should really find sym, but cp-name-parser.y doesn't | |
3932 | know about lvalue/rvalue qualifiers yet. */ | |
3933 | with_params = std::string (sym) + " ( int ) &&"; | |
3934 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3935 | {}); | |
3936 | } | |
3937 | ||
e1ef7d7a PA |
3938 | /* Check that the name matching algorithm for completion doesn't get |
3939 | confused with Latin1 'ÿ' / 0xff. */ | |
3940 | { | |
3941 | static const char str[] = "\377"; | |
3942 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
3943 | EXPECT ("\377", "\377\377123")); | |
3944 | } | |
3945 | ||
3946 | /* Check that the increment-last-char in the matching algorithm for | |
3947 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
3948 | { | |
3949 | static const char str[] = "t1_func"; | |
3950 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
3951 | EXPECT ("t1_func", "t1_func1")); | |
3952 | } | |
3953 | ||
c62446b1 PA |
3954 | /* Check that completion mode works at each prefix of the expected |
3955 | symbol name. */ | |
3956 | { | |
3957 | static const char str[] = "function(int)"; | |
3958 | size_t len = strlen (str); | |
3959 | std::string lookup; | |
3960 | ||
3961 | for (size_t i = 1; i < len; i++) | |
3962 | { | |
3963 | lookup.assign (str, i); | |
3964 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
3965 | EXPECT ("function")); | |
3966 | } | |
3967 | } | |
3968 | ||
3969 | /* While "w" is a prefix of both components, the match function | |
3970 | should still only be called once. */ | |
3971 | { | |
3972 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
3973 | EXPECT ("w1::w2")); | |
a20714ff PA |
3974 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
3975 | EXPECT ("w1::w2")); | |
c62446b1 PA |
3976 | } |
3977 | ||
3978 | /* Same, with a "complicated" symbol. */ | |
3979 | { | |
3980 | static const char str[] = Z_SYM_NAME; | |
3981 | size_t len = strlen (str); | |
3982 | std::string lookup; | |
3983 | ||
3984 | for (size_t i = 1; i < len; i++) | |
3985 | { | |
3986 | lookup.assign (str, i); | |
3987 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
3988 | EXPECT (Z_SYM_NAME)); | |
3989 | } | |
3990 | } | |
3991 | ||
3992 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
3993 | { | |
3994 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
3995 | {}); | |
3996 | } | |
3997 | ||
3998 | /* A complete symbol with parameters matches any overload, since the | |
3999 | index has no overload info. */ | |
4000 | { | |
4001 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4002 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4003 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4004 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4005 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4006 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4007 | } |
4008 | ||
4009 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4010 | template argument list. */ | |
4011 | { | |
4012 | static const char expected[] = "ns::foo<int>"; | |
4013 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4014 | EXPECT (expected)); | |
a20714ff PA |
4015 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4016 | EXPECT (expected)); | |
c62446b1 PA |
4017 | } |
4018 | ||
4019 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4020 | template argument list that includes a pointer. */ | |
4021 | { | |
4022 | static const char expected[] = "ns::foo<char*>"; | |
4023 | /* Try both completion and non-completion modes. */ | |
4024 | static const bool completion_mode[2] = {false, true}; | |
4025 | for (size_t i = 0; i < 2; i++) | |
4026 | { | |
4027 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4028 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4029 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4030 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4031 | |
4032 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4033 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4034 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4035 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4036 | } |
4037 | } | |
4038 | ||
4039 | { | |
4040 | /* Check method qualifiers are ignored. */ | |
4041 | static const char expected[] = "ns::foo<char*>"; | |
4042 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4043 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4044 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4045 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4046 | CHECK_MATCH ("foo < char * > ( int ) const", |
4047 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4048 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4049 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4050 | } |
4051 | ||
4052 | /* Test lookup names that don't match anything. */ | |
4053 | { | |
a20714ff PA |
4054 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4055 | {}); | |
4056 | ||
c62446b1 PA |
4057 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4058 | {}); | |
4059 | } | |
4060 | ||
a20714ff PA |
4061 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4062 | which should not be confused with a parameter list. */ | |
4063 | { | |
4064 | static const char *syms[] = { | |
4065 | "A::B::C", | |
4066 | "B::C", | |
4067 | "C", | |
4068 | "A :: B :: C ( int )", | |
4069 | "B :: C ( int )", | |
4070 | "C ( int )", | |
4071 | }; | |
4072 | ||
4073 | for (const char *s : syms) | |
4074 | { | |
4075 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4076 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4077 | } | |
4078 | } | |
4079 | ||
4080 | { | |
4081 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4082 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4083 | EXPECT (expected)); | |
4084 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4085 | EXPECT (expected)); | |
4086 | } | |
4087 | ||
c62446b1 PA |
4088 | SELF_CHECK (!any_mismatch); |
4089 | ||
4090 | #undef EXPECT | |
4091 | #undef CHECK_MATCH | |
4092 | } | |
4093 | ||
5c58de74 PA |
4094 | static void |
4095 | run_test () | |
4096 | { | |
4097 | test_mapped_index_find_name_component_bounds (); | |
4098 | test_dw2_expand_symtabs_matching_symbol (); | |
4099 | } | |
4100 | ||
c62446b1 PA |
4101 | }} // namespace selftests::dw2_expand_symtabs_matching |
4102 | ||
4103 | #endif /* GDB_SELF_TEST */ | |
4104 | ||
4b514bc8 JK |
4105 | /* If FILE_MATCHER is NULL or if PER_CU has |
4106 | dwarf2_per_cu_quick_data::MARK set (see | |
4107 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4108 | EXPANSION_NOTIFY on it. */ | |
4109 | ||
df35e626 | 4110 | static bool |
4b514bc8 | 4111 | dw2_expand_symtabs_matching_one |
97a1449a SM |
4112 | (dwarf2_per_cu_data *per_cu, |
4113 | dwarf2_per_objfile *per_objfile, | |
4b514bc8 JK |
4114 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4115 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4116 | { | |
4117 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4118 | { | |
af758d11 | 4119 | bool symtab_was_null = !per_objfile->symtab_set_p (per_cu); |
4b514bc8 | 4120 | |
97a1449a SM |
4121 | compunit_symtab *symtab |
4122 | = dw2_instantiate_symtab (per_cu, per_objfile, false); | |
af758d11 | 4123 | gdb_assert (symtab != nullptr); |
4b514bc8 | 4124 | |
af758d11 | 4125 | if (expansion_notify != NULL && symtab_was_null) |
df35e626 | 4126 | return expansion_notify (symtab); |
4b514bc8 | 4127 | } |
df35e626 | 4128 | return true; |
4b514bc8 JK |
4129 | } |
4130 | ||
3f563c84 PA |
4131 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4132 | matched, to expand corresponding CUs that were marked. IDX is the | |
4133 | index of the symbol name that matched. */ | |
4134 | ||
df35e626 | 4135 | static bool |
3f563c84 | 4136 | dw2_expand_marked_cus |
976ca316 | 4137 | (dwarf2_per_objfile *per_objfile, offset_type idx, |
3f563c84 PA |
4138 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4139 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 4140 | block_search_flags search_flags, |
3f563c84 PA |
4141 | search_domain kind) |
4142 | { | |
42c2c694 | 4143 | offset_type vec_len, vec_idx; |
3f563c84 | 4144 | bool global_seen = false; |
976ca316 | 4145 | mapped_index &index = *per_objfile->per_bfd->index_table; |
3f563c84 | 4146 | |
42c2c694 TT |
4147 | offset_view vec (index.constant_pool.slice (index.symbol_vec_index (idx))); |
4148 | vec_len = vec[0]; | |
61920122 PA |
4149 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) |
4150 | { | |
42c2c694 | 4151 | offset_type cu_index_and_attrs = vec[vec_idx + 1]; |
61920122 PA |
4152 | /* This value is only valid for index versions >= 7. */ |
4153 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4154 | gdb_index_symbol_kind symbol_kind = | |
4155 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4156 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4157 | /* Only check the symbol attributes if they're present. | |
4158 | Indices prior to version 7 don't record them, | |
4159 | and indices >= 7 may elide them for certain symbols | |
4160 | (gold does this). */ | |
4161 | int attrs_valid = | |
4162 | (index.version >= 7 | |
4163 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4164 | ||
4165 | /* Work around gold/15646. */ | |
f030440d TV |
4166 | if (attrs_valid |
4167 | && !is_static | |
4168 | && symbol_kind == GDB_INDEX_SYMBOL_KIND_TYPE) | |
9291a0cd | 4169 | { |
f030440d | 4170 | if (global_seen) |
61920122 | 4171 | continue; |
f030440d TV |
4172 | |
4173 | global_seen = true; | |
61920122 | 4174 | } |
3190f0c6 | 4175 | |
61920122 PA |
4176 | /* Only check the symbol's kind if it has one. */ |
4177 | if (attrs_valid) | |
4178 | { | |
03a8ea51 TT |
4179 | if (is_static) |
4180 | { | |
4181 | if ((search_flags & SEARCH_STATIC_BLOCK) == 0) | |
4182 | continue; | |
4183 | } | |
4184 | else | |
4185 | { | |
4186 | if ((search_flags & SEARCH_GLOBAL_BLOCK) == 0) | |
4187 | continue; | |
4188 | } | |
4189 | ||
61920122 | 4190 | switch (kind) |
8943b874 | 4191 | { |
61920122 PA |
4192 | case VARIABLES_DOMAIN: |
4193 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4194 | continue; | |
4195 | break; | |
4196 | case FUNCTIONS_DOMAIN: | |
4197 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4198 | continue; |
61920122 PA |
4199 | break; |
4200 | case TYPES_DOMAIN: | |
4201 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4202 | continue; | |
4203 | break; | |
59c35742 AB |
4204 | case MODULES_DOMAIN: |
4205 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4206 | continue; | |
4207 | break; | |
61920122 PA |
4208 | default: |
4209 | break; | |
8943b874 | 4210 | } |
61920122 | 4211 | } |
8943b874 | 4212 | |
61920122 | 4213 | /* Don't crash on bad data. */ |
91eea9cc | 4214 | if (cu_index >= per_objfile->per_bfd->all_comp_units.size ()) |
61920122 | 4215 | { |
b98664d3 | 4216 | complaint (_(".gdb_index entry has bad CU index" |
976ca316 | 4217 | " [in module %s]"), objfile_name (per_objfile->objfile)); |
61920122 PA |
4218 | continue; |
4219 | } | |
4220 | ||
91eea9cc | 4221 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (cu_index); |
df35e626 TT |
4222 | if (!dw2_expand_symtabs_matching_one (per_cu, per_objfile, file_matcher, |
4223 | expansion_notify)) | |
4224 | return false; | |
61920122 | 4225 | } |
df35e626 TT |
4226 | |
4227 | return true; | |
61920122 PA |
4228 | } |
4229 | ||
4b514bc8 JK |
4230 | /* If FILE_MATCHER is non-NULL, set all the |
4231 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4232 | that match FILE_MATCHER. */ | |
4233 | ||
61920122 | 4234 | static void |
4b514bc8 | 4235 | dw_expand_symtabs_matching_file_matcher |
976ca316 | 4236 | (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 4237 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) |
61920122 | 4238 | { |
4b514bc8 | 4239 | if (file_matcher == NULL) |
61920122 PA |
4240 | return; |
4241 | ||
4b514bc8 JK |
4242 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
4243 | htab_eq_pointer, | |
4244 | NULL, xcalloc, xfree)); | |
4245 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4246 | htab_eq_pointer, |
4247 | NULL, xcalloc, xfree)); | |
61920122 | 4248 | |
4b514bc8 JK |
4249 | /* The rule is CUs specify all the files, including those used by |
4250 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4251 | |
0d305d5c | 4252 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
927aa2e7 | 4253 | { |
927aa2e7 JK |
4254 | QUIT; |
4255 | ||
91eea9cc TT |
4256 | if (per_cu->is_debug_types) |
4257 | continue; | |
927aa2e7 JK |
4258 | per_cu->v.quick->mark = 0; |
4259 | ||
4260 | /* We only need to look at symtabs not already expanded. */ | |
0d305d5c | 4261 | if (per_objfile->symtab_set_p (per_cu.get ())) |
927aa2e7 JK |
4262 | continue; |
4263 | ||
0d305d5c TT |
4264 | quick_file_names *file_data = dw2_get_file_names (per_cu.get (), |
4265 | per_objfile); | |
927aa2e7 JK |
4266 | if (file_data == NULL) |
4267 | continue; | |
4268 | ||
4269 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4270 | continue; | |
4271 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4272 | { | |
4273 | per_cu->v.quick->mark = 1; | |
4274 | continue; | |
4275 | } | |
4276 | ||
b76e467d | 4277 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4278 | { |
4279 | const char *this_real_name; | |
4280 | ||
4281 | if (file_matcher (file_data->file_names[j], false)) | |
4282 | { | |
4283 | per_cu->v.quick->mark = 1; | |
4284 | break; | |
4285 | } | |
4286 | ||
4287 | /* Before we invoke realpath, which can get expensive when many | |
4288 | files are involved, do a quick comparison of the basenames. */ | |
4289 | if (!basenames_may_differ | |
4290 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4291 | true)) | |
4292 | continue; | |
4293 | ||
976ca316 | 4294 | this_real_name = dw2_get_real_path (per_objfile, file_data, j); |
927aa2e7 JK |
4295 | if (file_matcher (this_real_name, false)) |
4296 | { | |
4297 | per_cu->v.quick->mark = 1; | |
4298 | break; | |
4299 | } | |
4300 | } | |
4301 | ||
b76e467d SM |
4302 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4303 | ? visited_found.get () | |
4304 | : visited_not_found.get (), | |
4305 | file_data, INSERT); | |
927aa2e7 JK |
4306 | *slot = file_data; |
4307 | } | |
4308 | } | |
4309 | ||
df35e626 | 4310 | bool |
af82f89d TT |
4311 | dwarf2_gdb_index::expand_symtabs_matching |
4312 | (struct objfile *objfile, | |
4313 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4314 | const lookup_name_info *lookup_name, | |
4315 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4316 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 4317 | block_search_flags search_flags, |
3bfa51a7 | 4318 | domain_enum domain, |
af82f89d | 4319 | enum search_domain kind) |
927aa2e7 | 4320 | { |
976ca316 | 4321 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
927aa2e7 JK |
4322 | |
4323 | /* index_table is NULL if OBJF_READNOW. */ | |
976ca316 | 4324 | if (!per_objfile->per_bfd->index_table) |
df35e626 | 4325 | return true; |
927aa2e7 | 4326 | |
976ca316 | 4327 | dw_expand_symtabs_matching_file_matcher (per_objfile, file_matcher); |
927aa2e7 | 4328 | |
c1a66c06 TV |
4329 | if (symbol_matcher == NULL && lookup_name == NULL) |
4330 | { | |
0d305d5c | 4331 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
c1a66c06 TV |
4332 | { |
4333 | QUIT; | |
4334 | ||
0d305d5c | 4335 | if (!dw2_expand_symtabs_matching_one (per_cu.get (), per_objfile, |
df35e626 TT |
4336 | file_matcher, |
4337 | expansion_notify)) | |
4338 | return false; | |
c1a66c06 | 4339 | } |
df35e626 | 4340 | return true; |
c1a66c06 TV |
4341 | } |
4342 | ||
976ca316 | 4343 | mapped_index &index = *per_objfile->per_bfd->index_table; |
927aa2e7 | 4344 | |
df35e626 TT |
4345 | bool result |
4346 | = dw2_expand_symtabs_matching_symbol (index, *lookup_name, | |
4347 | symbol_matcher, | |
4348 | [&] (offset_type idx) | |
927aa2e7 | 4349 | { |
df35e626 | 4350 | if (!dw2_expand_marked_cus (per_objfile, idx, file_matcher, |
03a8ea51 | 4351 | expansion_notify, search_flags, kind)) |
df35e626 | 4352 | return false; |
3b00ef10 | 4353 | return true; |
976ca316 | 4354 | }, per_objfile); |
df35e626 TT |
4355 | |
4356 | return result; | |
927aa2e7 JK |
4357 | } |
4358 | ||
4359 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4360 | symtab. */ | |
4361 | ||
4362 | static struct compunit_symtab * | |
4363 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4364 | CORE_ADDR pc) | |
4365 | { | |
4366 | int i; | |
4367 | ||
4368 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4369 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4370 | return cust; | |
4371 | ||
4372 | if (cust->includes == NULL) | |
4373 | return NULL; | |
4374 | ||
4375 | for (i = 0; cust->includes[i]; ++i) | |
4376 | { | |
4377 | struct compunit_symtab *s = cust->includes[i]; | |
4378 | ||
4379 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4380 | if (s != NULL) | |
4381 | return s; | |
4382 | } | |
4383 | ||
4384 | return NULL; | |
4385 | } | |
4386 | ||
39298a5d TT |
4387 | struct compunit_symtab * |
4388 | dwarf2_base_index_functions::find_pc_sect_compunit_symtab | |
4389 | (struct objfile *objfile, | |
4390 | struct bound_minimal_symbol msymbol, | |
4391 | CORE_ADDR pc, | |
4392 | struct obj_section *section, | |
4393 | int warn_if_readin) | |
927aa2e7 JK |
4394 | { |
4395 | struct dwarf2_per_cu_data *data; | |
4396 | struct compunit_symtab *result; | |
4397 | ||
efd7398e TT |
4398 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
4399 | if (per_objfile->per_bfd->index_addrmap == nullptr) | |
927aa2e7 JK |
4400 | return NULL; |
4401 | ||
b3b3bada | 4402 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
efd7398e TT |
4403 | data = ((struct dwarf2_per_cu_data *) |
4404 | addrmap_find (per_objfile->per_bfd->index_addrmap, | |
4405 | pc - baseaddr)); | |
927aa2e7 JK |
4406 | if (!data) |
4407 | return NULL; | |
4408 | ||
af758d11 | 4409 | if (warn_if_readin && per_objfile->symtab_set_p (data)) |
927aa2e7 | 4410 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
08feed99 | 4411 | paddress (objfile->arch (), pc)); |
927aa2e7 | 4412 | |
97a1449a SM |
4413 | result = recursively_find_pc_sect_compunit_symtab |
4414 | (dw2_instantiate_symtab (data, per_objfile, false), pc); | |
4415 | ||
927aa2e7 JK |
4416 | gdb_assert (result != NULL); |
4417 | return result; | |
4418 | } | |
4419 | ||
39298a5d | 4420 | void |
f4655dee TT |
4421 | dwarf2_base_index_functions::map_symbol_filenames |
4422 | (struct objfile *objfile, | |
4423 | gdb::function_view<symbol_filename_ftype> fun, | |
4424 | bool need_fullname) | |
927aa2e7 | 4425 | { |
976ca316 | 4426 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
927aa2e7 | 4427 | |
9fc29955 AB |
4428 | /* Use caches to ensure we only call FUN once for each filename. */ |
4429 | filename_seen_cache filenames_cache; | |
4430 | std::unordered_set<quick_file_names *> qfn_cache; | |
927aa2e7 | 4431 | |
9fc29955 AB |
4432 | /* The rule is CUs specify all the files, including those used by any TU, |
4433 | so there's no need to scan TUs here. We can ignore file names coming | |
4434 | from already-expanded CUs. It is possible that an expanded CU might | |
4435 | reuse the file names data from a currently unexpanded CU, in this | |
4436 | case we don't want to report the files from the unexpanded CU. */ | |
927aa2e7 | 4437 | |
0d305d5c | 4438 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
9fc29955 | 4439 | { |
0d305d5c | 4440 | if (per_objfile->symtab_set_p (per_cu.get ())) |
927aa2e7 | 4441 | { |
9fc29955 AB |
4442 | if (per_cu->v.quick->file_names != nullptr) |
4443 | qfn_cache.insert (per_cu->v.quick->file_names); | |
927aa2e7 | 4444 | } |
9fc29955 | 4445 | } |
927aa2e7 | 4446 | |
0d305d5c | 4447 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
9fc29955 AB |
4448 | { |
4449 | /* We only need to look at symtabs not already expanded. */ | |
0d305d5c | 4450 | if (per_objfile->symtab_set_p (per_cu.get ())) |
9fc29955 | 4451 | continue; |
927aa2e7 | 4452 | |
0d305d5c TT |
4453 | quick_file_names *file_data = dw2_get_file_names (per_cu.get (), |
4454 | per_objfile); | |
9fc29955 AB |
4455 | if (file_data == nullptr |
4456 | || qfn_cache.find (file_data) != qfn_cache.end ()) | |
4457 | continue; | |
927aa2e7 | 4458 | |
9fc29955 AB |
4459 | for (int j = 0; j < file_data->num_file_names; ++j) |
4460 | { | |
4461 | const char *filename = file_data->file_names[j]; | |
4462 | filenames_cache.seen (filename); | |
927aa2e7 JK |
4463 | } |
4464 | } | |
4465 | ||
9fc29955 | 4466 | filenames_cache.traverse ([&] (const char *filename) |
927aa2e7 JK |
4467 | { |
4468 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4469 | ||
4470 | if (need_fullname) | |
4471 | this_real_name = gdb_realpath (filename); | |
f4655dee | 4472 | fun (filename, this_real_name.get ()); |
927aa2e7 JK |
4473 | }); |
4474 | } | |
4475 | ||
39298a5d TT |
4476 | bool |
4477 | dwarf2_base_index_functions::has_symbols (struct objfile *objfile) | |
927aa2e7 | 4478 | { |
fae2120b | 4479 | return true; |
927aa2e7 JK |
4480 | } |
4481 | ||
927aa2e7 JK |
4482 | /* DWARF-5 debug_names reader. */ |
4483 | ||
4484 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4485 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4486 | ||
4487 | /* A helper function that reads the .debug_names section in SECTION | |
4488 | and fills in MAP. FILENAME is the name of the file containing the | |
4489 | section; it is used for error reporting. | |
4490 | ||
4491 | Returns true if all went well, false otherwise. */ | |
4492 | ||
4493 | static bool | |
4494 | read_debug_names_from_section (struct objfile *objfile, | |
4495 | const char *filename, | |
4496 | struct dwarf2_section_info *section, | |
4497 | mapped_debug_names &map) | |
4498 | { | |
96b79293 | 4499 | if (section->empty ()) |
927aa2e7 JK |
4500 | return false; |
4501 | ||
4502 | /* Older elfutils strip versions could keep the section in the main | |
4503 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4504 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4505 | return false; |
4506 | ||
96b79293 | 4507 | section->read (objfile); |
927aa2e7 | 4508 | |
08feed99 | 4509 | map.dwarf5_byte_order = gdbarch_byte_order (objfile->arch ()); |
927aa2e7 JK |
4510 | |
4511 | const gdb_byte *addr = section->buffer; | |
4512 | ||
96b79293 | 4513 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4514 | |
4515 | unsigned int bytes_read; | |
4516 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4517 | addr += bytes_read; | |
4518 | ||
4519 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4520 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4521 | if (bytes_read + length != section->size) | |
4522 | { | |
4523 | /* There may be multiple per-CU indices. */ | |
4524 | warning (_("Section .debug_names in %s length %s does not match " | |
4525 | "section length %s, ignoring .debug_names."), | |
4526 | filename, plongest (bytes_read + length), | |
4527 | pulongest (section->size)); | |
4528 | return false; | |
4529 | } | |
4530 | ||
4531 | /* The version number. */ | |
4532 | uint16_t version = read_2_bytes (abfd, addr); | |
4533 | addr += 2; | |
4534 | if (version != 5) | |
4535 | { | |
4536 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4537 | "ignoring .debug_names."), | |
4538 | filename, version); | |
4539 | return false; | |
4540 | } | |
4541 | ||
4542 | /* Padding. */ | |
4543 | uint16_t padding = read_2_bytes (abfd, addr); | |
4544 | addr += 2; | |
4545 | if (padding != 0) | |
4546 | { | |
4547 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4548 | "ignoring .debug_names."), | |
4549 | filename, padding); | |
4550 | return false; | |
4551 | } | |
4552 | ||
4553 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4554 | map.cu_count = read_4_bytes (abfd, addr); | |
4555 | addr += 4; | |
4556 | ||
4557 | /* local_type_unit_count - The number of TUs in the local TU | |
4558 | list. */ | |
4559 | map.tu_count = read_4_bytes (abfd, addr); | |
4560 | addr += 4; | |
4561 | ||
4562 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4563 | list. */ | |
4564 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4565 | addr += 4; | |
4566 | if (foreign_tu_count != 0) | |
4567 | { | |
4568 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4569 | "ignoring .debug_names."), | |
4570 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4571 | return false; | |
4572 | } | |
4573 | ||
4574 | /* bucket_count - The number of hash buckets in the hash lookup | |
4575 | table. */ | |
4576 | map.bucket_count = read_4_bytes (abfd, addr); | |
4577 | addr += 4; | |
4578 | ||
4579 | /* name_count - The number of unique names in the index. */ | |
4580 | map.name_count = read_4_bytes (abfd, addr); | |
4581 | addr += 4; | |
4582 | ||
4583 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4584 | table. */ | |
4585 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4586 | addr += 4; | |
4587 | ||
4588 | /* augmentation_string_size - The size in bytes of the augmentation | |
4589 | string. This value is rounded up to a multiple of 4. */ | |
4590 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4591 | addr += 4; | |
4592 | map.augmentation_is_gdb = ((augmentation_string_size | |
4593 | == sizeof (dwarf5_augmentation)) | |
4594 | && memcmp (addr, dwarf5_augmentation, | |
4595 | sizeof (dwarf5_augmentation)) == 0); | |
4596 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4597 | addr += augmentation_string_size; | |
4598 | ||
4599 | /* List of CUs */ | |
4600 | map.cu_table_reordered = addr; | |
4601 | addr += map.cu_count * map.offset_size; | |
4602 | ||
4603 | /* List of Local TUs */ | |
4604 | map.tu_table_reordered = addr; | |
4605 | addr += map.tu_count * map.offset_size; | |
4606 | ||
4607 | /* Hash Lookup Table */ | |
4608 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4609 | addr += map.bucket_count * 4; | |
4610 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4611 | addr += map.name_count * 4; | |
4612 | ||
4613 | /* Name Table */ | |
4614 | map.name_table_string_offs_reordered = addr; | |
4615 | addr += map.name_count * map.offset_size; | |
4616 | map.name_table_entry_offs_reordered = addr; | |
4617 | addr += map.name_count * map.offset_size; | |
4618 | ||
4619 | const gdb_byte *abbrev_table_start = addr; | |
4620 | for (;;) | |
4621 | { | |
927aa2e7 JK |
4622 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4623 | addr += bytes_read; | |
4624 | if (index_num == 0) | |
4625 | break; | |
4626 | ||
4627 | const auto insertpair | |
4628 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4629 | if (!insertpair.second) | |
4630 | { | |
4631 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4632 | "ignoring .debug_names."), | |
4633 | filename, pulongest (index_num)); | |
4634 | return false; | |
4635 | } | |
4636 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4637 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4638 | addr += bytes_read; | |
4639 | ||
4640 | for (;;) | |
4641 | { | |
4642 | mapped_debug_names::index_val::attr attr; | |
4643 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4644 | addr += bytes_read; | |
4645 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4646 | addr += bytes_read; | |
4647 | if (attr.form == DW_FORM_implicit_const) | |
4648 | { | |
4649 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4650 | &bytes_read); | |
4651 | addr += bytes_read; | |
4652 | } | |
4653 | if (attr.dw_idx == 0 && attr.form == 0) | |
4654 | break; | |
4655 | indexval.attr_vec.push_back (std::move (attr)); | |
4656 | } | |
4657 | } | |
4658 | if (addr != abbrev_table_start + abbrev_table_size) | |
4659 | { | |
4660 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
4661 | "of size %s vs. written as %u, ignoring .debug_names."), |
4662 | filename, plongest (addr - abbrev_table_start), | |
4663 | abbrev_table_size); | |
927aa2e7 JK |
4664 | return false; |
4665 | } | |
4666 | map.entry_pool = addr; | |
4667 | ||
4668 | return true; | |
4669 | } | |
4670 | ||
4671 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
4672 | list. */ | |
4673 | ||
4674 | static void | |
168c9250 | 4675 | create_cus_from_debug_names_list (dwarf2_per_bfd *per_bfd, |
927aa2e7 JK |
4676 | const mapped_debug_names &map, |
4677 | dwarf2_section_info §ion, | |
b76e467d | 4678 | bool is_dwz) |
927aa2e7 | 4679 | { |
3ee6bb11 TV |
4680 | if (!map.augmentation_is_gdb) |
4681 | { | |
fc9a13fb TV |
4682 | for (uint32_t i = 0; i < map.cu_count; ++i) |
4683 | { | |
4684 | sect_offset sect_off | |
4685 | = (sect_offset) (extract_unsigned_integer | |
4686 | (map.cu_table_reordered + i * map.offset_size, | |
4687 | map.offset_size, | |
4688 | map.dwarf5_byte_order)); | |
4689 | /* We don't know the length of the CU, because the CU list in a | |
4690 | .debug_names index can be incomplete, so we can't use the start | |
4691 | of the next CU as end of this CU. We create the CUs here with | |
4692 | length 0, and in cutu_reader::cutu_reader we'll fill in the | |
4693 | actual length. */ | |
473ab964 | 4694 | dwarf2_per_cu_data_up per_cu |
fc9a13fb TV |
4695 | = create_cu_from_index_list (per_bfd, §ion, is_dwz, |
4696 | sect_off, 0); | |
0d305d5c | 4697 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
fc9a13fb | 4698 | } |
d3b54e63 | 4699 | return; |
3ee6bb11 TV |
4700 | } |
4701 | ||
927aa2e7 JK |
4702 | sect_offset sect_off_prev; |
4703 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
4704 | { | |
4705 | sect_offset sect_off_next; | |
4706 | if (i < map.cu_count) | |
4707 | { | |
4708 | sect_off_next | |
4709 | = (sect_offset) (extract_unsigned_integer | |
4710 | (map.cu_table_reordered + i * map.offset_size, | |
4711 | map.offset_size, | |
4712 | map.dwarf5_byte_order)); | |
4713 | } | |
4714 | else | |
4715 | sect_off_next = (sect_offset) section.size; | |
4716 | if (i >= 1) | |
4717 | { | |
4718 | const ULONGEST length = sect_off_next - sect_off_prev; | |
473ab964 | 4719 | dwarf2_per_cu_data_up per_cu |
168c9250 | 4720 | = create_cu_from_index_list (per_bfd, §ion, is_dwz, |
927aa2e7 | 4721 | sect_off_prev, length); |
0d305d5c | 4722 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
927aa2e7 JK |
4723 | } |
4724 | sect_off_prev = sect_off_next; | |
4725 | } | |
4726 | } | |
4727 | ||
4728 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 4729 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
4730 | |
4731 | static void | |
168c9250 | 4732 | create_cus_from_debug_names (dwarf2_per_bfd *per_bfd, |
927aa2e7 JK |
4733 | const mapped_debug_names &map, |
4734 | const mapped_debug_names &dwz_map) | |
4735 | { | |
168c9250 SM |
4736 | gdb_assert (per_bfd->all_comp_units.empty ()); |
4737 | per_bfd->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 4738 | |
168c9250 | 4739 | create_cus_from_debug_names_list (per_bfd, map, per_bfd->info, |
b76e467d | 4740 | false /* is_dwz */); |
927aa2e7 JK |
4741 | |
4742 | if (dwz_map.cu_count == 0) | |
4743 | return; | |
4744 | ||
168c9250 SM |
4745 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
4746 | create_cus_from_debug_names_list (per_bfd, dwz_map, dwz->info, | |
b76e467d | 4747 | true /* is_dwz */); |
927aa2e7 JK |
4748 | } |
4749 | ||
4750 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
4751 | elements of all the CUs and return true. Otherwise, return false. */ | |
4752 | ||
4753 | static bool | |
976ca316 | 4754 | dwarf2_read_debug_names (dwarf2_per_objfile *per_objfile) |
927aa2e7 | 4755 | { |
fcf23d5b SM |
4756 | std::unique_ptr<mapped_debug_names> map (new mapped_debug_names); |
4757 | mapped_debug_names dwz_map; | |
976ca316 | 4758 | struct objfile *objfile = per_objfile->objfile; |
f8c41851 | 4759 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
927aa2e7 JK |
4760 | |
4761 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
bab287cd | 4762 | &per_bfd->debug_names, *map)) |
927aa2e7 JK |
4763 | return false; |
4764 | ||
4765 | /* Don't use the index if it's empty. */ | |
22ca247e | 4766 | if (map->name_count == 0) |
927aa2e7 JK |
4767 | return false; |
4768 | ||
4769 | /* If there is a .dwz file, read it so we can get its CU list as | |
4770 | well. */ | |
f8c41851 | 4771 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
927aa2e7 JK |
4772 | if (dwz != NULL) |
4773 | { | |
4774 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 4775 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
4776 | &dwz->debug_names, dwz_map)) |
4777 | { | |
4778 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 4779 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
4780 | return false; |
4781 | } | |
4782 | } | |
4783 | ||
f8c41851 | 4784 | create_cus_from_debug_names (per_bfd, *map, dwz_map); |
927aa2e7 | 4785 | |
22ca247e | 4786 | if (map->tu_count != 0) |
927aa2e7 JK |
4787 | { |
4788 | /* We can only handle a single .debug_types when we have an | |
4789 | index. */ | |
f8c41851 | 4790 | if (per_bfd->types.size () != 1) |
927aa2e7 JK |
4791 | return false; |
4792 | ||
f8c41851 | 4793 | dwarf2_section_info *section = &per_bfd->types[0]; |
927aa2e7 JK |
4794 | |
4795 | create_signatured_type_table_from_debug_names | |
f8c41851 | 4796 | (per_objfile, *map, section, &per_bfd->abbrev); |
927aa2e7 JK |
4797 | } |
4798 | ||
f8c41851 | 4799 | create_addrmap_from_aranges (per_objfile, &per_bfd->debug_aranges); |
927aa2e7 | 4800 | |
f8c41851 SM |
4801 | per_bfd->debug_names_table = std::move (map); |
4802 | per_bfd->using_index = 1; | |
4803 | per_bfd->quick_file_names_table = | |
bab287cd | 4804 | create_quick_file_names_table (per_bfd->all_comp_units.size ()); |
927aa2e7 JK |
4805 | |
4806 | return true; | |
4807 | } | |
4808 | ||
927aa2e7 JK |
4809 | /* Type used to manage iterating over all CUs looking for a symbol for |
4810 | .debug_names. */ | |
4811 | ||
4812 | class dw2_debug_names_iterator | |
4813 | { | |
4814 | public: | |
927aa2e7 | 4815 | dw2_debug_names_iterator (const mapped_debug_names &map, |
03a8ea51 | 4816 | block_search_flags block_index, |
2b79f376 | 4817 | domain_enum domain, |
fcf23d5b | 4818 | const char *name, dwarf2_per_objfile *per_objfile) |
2b79f376 | 4819 | : m_map (map), m_block_index (block_index), m_domain (domain), |
fcf23d5b SM |
4820 | m_addr (find_vec_in_debug_names (map, name, per_objfile)), |
4821 | m_per_objfile (per_objfile) | |
927aa2e7 JK |
4822 | {} |
4823 | ||
4824 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
03a8ea51 | 4825 | search_domain search, uint32_t namei, |
3bfa51a7 TT |
4826 | dwarf2_per_objfile *per_objfile, |
4827 | domain_enum domain = UNDEF_DOMAIN) | |
927aa2e7 | 4828 | : m_map (map), |
3bfa51a7 | 4829 | m_domain (domain), |
927aa2e7 | 4830 | m_search (search), |
fcf23d5b SM |
4831 | m_addr (find_vec_in_debug_names (map, namei, per_objfile)), |
4832 | m_per_objfile (per_objfile) | |
927aa2e7 JK |
4833 | {} |
4834 | ||
3b00ef10 | 4835 | dw2_debug_names_iterator (const mapped_debug_names &map, |
03a8ea51 | 4836 | block_search_flags block_index, domain_enum domain, |
fcf23d5b | 4837 | uint32_t namei, dwarf2_per_objfile *per_objfile) |
3b00ef10 | 4838 | : m_map (map), m_block_index (block_index), m_domain (domain), |
fcf23d5b SM |
4839 | m_addr (find_vec_in_debug_names (map, namei, per_objfile)), |
4840 | m_per_objfile (per_objfile) | |
3b00ef10 TT |
4841 | {} |
4842 | ||
927aa2e7 JK |
4843 | /* Return the next matching CU or NULL if there are no more. */ |
4844 | dwarf2_per_cu_data *next (); | |
4845 | ||
4846 | private: | |
4847 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
976ca316 SM |
4848 | const char *name, |
4849 | dwarf2_per_objfile *per_objfile); | |
927aa2e7 | 4850 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
976ca316 SM |
4851 | uint32_t namei, |
4852 | dwarf2_per_objfile *per_objfile); | |
927aa2e7 JK |
4853 | |
4854 | /* The internalized form of .debug_names. */ | |
4855 | const mapped_debug_names &m_map; | |
4856 | ||
03a8ea51 TT |
4857 | /* Restrict the search to these blocks. */ |
4858 | block_search_flags m_block_index = (SEARCH_GLOBAL_BLOCK | |
4859 | | SEARCH_STATIC_BLOCK); | |
927aa2e7 JK |
4860 | |
4861 | /* The kind of symbol we're looking for. */ | |
4862 | const domain_enum m_domain = UNDEF_DOMAIN; | |
4863 | const search_domain m_search = ALL_DOMAIN; | |
4864 | ||
4865 | /* The list of CUs from the index entry of the symbol, or NULL if | |
4866 | not found. */ | |
4867 | const gdb_byte *m_addr; | |
fcf23d5b SM |
4868 | |
4869 | dwarf2_per_objfile *m_per_objfile; | |
927aa2e7 JK |
4870 | }; |
4871 | ||
4872 | const char * | |
fcf23d5b | 4873 | mapped_debug_names::namei_to_name |
976ca316 | 4874 | (uint32_t namei, dwarf2_per_objfile *per_objfile) const |
927aa2e7 JK |
4875 | { |
4876 | const ULONGEST namei_string_offs | |
4877 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
4878 | + namei * offset_size), | |
4879 | offset_size, | |
4880 | dwarf5_byte_order); | |
976ca316 | 4881 | return read_indirect_string_at_offset (per_objfile, namei_string_offs); |
927aa2e7 JK |
4882 | } |
4883 | ||
4884 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
4885 | found, return pointer to its pool data. If NAME cannot be found, | |
4886 | return NULL. */ | |
4887 | ||
4888 | const gdb_byte * | |
4889 | dw2_debug_names_iterator::find_vec_in_debug_names | |
976ca316 SM |
4890 | (const mapped_debug_names &map, const char *name, |
4891 | dwarf2_per_objfile *per_objfile) | |
927aa2e7 JK |
4892 | { |
4893 | int (*cmp) (const char *, const char *); | |
4894 | ||
54ee4252 | 4895 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
4896 | if (current_language->la_language == language_cplus |
4897 | || current_language->la_language == language_fortran | |
4898 | || current_language->la_language == language_d) | |
4899 | { | |
4900 | /* NAME is already canonical. Drop any qualifiers as | |
4901 | .debug_names does not contain any. */ | |
4902 | ||
4903 | if (strchr (name, '(') != NULL) | |
4904 | { | |
54ee4252 | 4905 | without_params = cp_remove_params (name); |
927aa2e7 | 4906 | if (without_params != NULL) |
54ee4252 | 4907 | name = without_params.get (); |
927aa2e7 JK |
4908 | } |
4909 | } | |
4910 | ||
4911 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
4912 | ||
4913 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
4914 | uint32_t namei | |
4915 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
4916 | (map.bucket_table_reordered | |
4917 | + (full_hash % map.bucket_count)), 4, | |
4918 | map.dwarf5_byte_order); | |
4919 | if (namei == 0) | |
4920 | return NULL; | |
4921 | --namei; | |
4922 | if (namei >= map.name_count) | |
4923 | { | |
b98664d3 | 4924 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
4925 | "[in module %s]"), |
4926 | namei, map.name_count, | |
fcf23d5b | 4927 | objfile_name (per_objfile->objfile)); |
927aa2e7 JK |
4928 | return NULL; |
4929 | } | |
4930 | ||
4931 | for (;;) | |
4932 | { | |
4933 | const uint32_t namei_full_hash | |
4934 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
4935 | (map.hash_table_reordered + namei), 4, | |
4936 | map.dwarf5_byte_order); | |
4937 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
4938 | return NULL; | |
4939 | ||
4940 | if (full_hash == namei_full_hash) | |
4941 | { | |
fcf23d5b | 4942 | const char *const namei_string = map.namei_to_name (namei, per_objfile); |
927aa2e7 JK |
4943 | |
4944 | #if 0 /* An expensive sanity check. */ | |
4945 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
4946 | { | |
b98664d3 | 4947 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
4948 | "[in module %s]"), |
4949 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
4950 | return NULL; | |
4951 | } | |
4952 | #endif | |
4953 | ||
4954 | if (cmp (namei_string, name) == 0) | |
4955 | { | |
4956 | const ULONGEST namei_entry_offs | |
4957 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
4958 | + namei * map.offset_size), | |
4959 | map.offset_size, map.dwarf5_byte_order); | |
4960 | return map.entry_pool + namei_entry_offs; | |
4961 | } | |
4962 | } | |
4963 | ||
4964 | ++namei; | |
4965 | if (namei >= map.name_count) | |
4966 | return NULL; | |
4967 | } | |
4968 | } | |
4969 | ||
4970 | const gdb_byte * | |
4971 | dw2_debug_names_iterator::find_vec_in_debug_names | |
fcf23d5b | 4972 | (const mapped_debug_names &map, uint32_t namei, dwarf2_per_objfile *per_objfile) |
927aa2e7 JK |
4973 | { |
4974 | if (namei >= map.name_count) | |
4975 | { | |
b98664d3 | 4976 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
4977 | "[in module %s]"), |
4978 | namei, map.name_count, | |
fcf23d5b | 4979 | objfile_name (per_objfile->objfile)); |
927aa2e7 JK |
4980 | return NULL; |
4981 | } | |
4982 | ||
4983 | const ULONGEST namei_entry_offs | |
4984 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
4985 | + namei * map.offset_size), | |
4986 | map.offset_size, map.dwarf5_byte_order); | |
4987 | return map.entry_pool + namei_entry_offs; | |
4988 | } | |
4989 | ||
4990 | /* See dw2_debug_names_iterator. */ | |
4991 | ||
4992 | dwarf2_per_cu_data * | |
4993 | dw2_debug_names_iterator::next () | |
4994 | { | |
4995 | if (m_addr == NULL) | |
4996 | return NULL; | |
4997 | ||
fcf23d5b SM |
4998 | dwarf2_per_bfd *per_bfd = m_per_objfile->per_bfd; |
4999 | struct objfile *objfile = m_per_objfile->objfile; | |
ed2dc618 | 5000 | bfd *const abfd = objfile->obfd; |
927aa2e7 JK |
5001 | |
5002 | again: | |
5003 | ||
5004 | unsigned int bytes_read; | |
5005 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5006 | m_addr += bytes_read; | |
5007 | if (abbrev == 0) | |
5008 | return NULL; | |
5009 | ||
5010 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5011 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5012 | { | |
b98664d3 | 5013 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5014 | "[in module %s]"), |
ed2dc618 | 5015 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5016 | return NULL; |
5017 | } | |
5018 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5019 | enum class symbol_linkage { |
5020 | unknown, | |
5021 | static_, | |
5022 | extern_, | |
23c13d42 | 5023 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5024 | dwarf2_per_cu_data *per_cu = NULL; |
5025 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5026 | { | |
5027 | ULONGEST ull; | |
5028 | switch (attr.form) | |
5029 | { | |
5030 | case DW_FORM_implicit_const: | |
5031 | ull = attr.implicit_const; | |
5032 | break; | |
5033 | case DW_FORM_flag_present: | |
5034 | ull = 1; | |
5035 | break; | |
5036 | case DW_FORM_udata: | |
5037 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5038 | m_addr += bytes_read; | |
5039 | break; | |
6dc55ce9 | 5040 | case DW_FORM_ref4: |
5041 | ull = read_4_bytes (abfd, m_addr); | |
5042 | m_addr += 4; | |
5043 | break; | |
5044 | case DW_FORM_ref8: | |
5045 | ull = read_8_bytes (abfd, m_addr); | |
5046 | m_addr += 8; | |
5047 | break; | |
5048 | case DW_FORM_ref_sig8: | |
5049 | ull = read_8_bytes (abfd, m_addr); | |
5050 | m_addr += 8; | |
5051 | break; | |
927aa2e7 | 5052 | default: |
b98664d3 | 5053 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5054 | dwarf_form_name (attr.form), |
ed2dc618 | 5055 | objfile_name (objfile)); |
927aa2e7 JK |
5056 | return NULL; |
5057 | } | |
5058 | switch (attr.dw_idx) | |
5059 | { | |
5060 | case DW_IDX_compile_unit: | |
5061 | /* Don't crash on bad data. */ | |
bab287cd | 5062 | if (ull >= per_bfd->all_comp_units.size ()) |
927aa2e7 | 5063 | { |
b98664d3 | 5064 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5065 | " [in module %s]"), |
5066 | pulongest (ull), | |
fcf23d5b | 5067 | objfile_name (objfile)); |
927aa2e7 JK |
5068 | continue; |
5069 | } | |
91eea9cc | 5070 | per_cu = per_bfd->get_cu (ull); |
927aa2e7 | 5071 | break; |
8af5c486 JK |
5072 | case DW_IDX_type_unit: |
5073 | /* Don't crash on bad data. */ | |
91eea9cc | 5074 | if (ull >= per_bfd->tu_stats.nr_tus) |
8af5c486 | 5075 | { |
b98664d3 | 5076 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5077 | " [in module %s]"), |
5078 | pulongest (ull), | |
fcf23d5b | 5079 | objfile_name (objfile)); |
8af5c486 JK |
5080 | continue; |
5081 | } | |
91eea9cc | 5082 | per_cu = per_bfd->get_cu (ull + per_bfd->tu_stats.nr_tus); |
8af5c486 | 5083 | break; |
6dc55ce9 | 5084 | case DW_IDX_die_offset: |
5085 | /* In a per-CU index (as opposed to a per-module index), index | |
5086 | entries without CU attribute implicitly refer to the single CU. */ | |
5087 | if (per_cu == NULL) | |
fcf23d5b | 5088 | per_cu = per_bfd->get_cu (0); |
6dc55ce9 | 5089 | break; |
927aa2e7 JK |
5090 | case DW_IDX_GNU_internal: |
5091 | if (!m_map.augmentation_is_gdb) | |
5092 | break; | |
23c13d42 | 5093 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5094 | break; |
5095 | case DW_IDX_GNU_external: | |
5096 | if (!m_map.augmentation_is_gdb) | |
5097 | break; | |
23c13d42 | 5098 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5099 | break; |
5100 | } | |
5101 | } | |
5102 | ||
5103 | /* Skip if already read in. */ | |
fcf23d5b | 5104 | if (m_per_objfile->symtab_set_p (per_cu)) |
927aa2e7 JK |
5105 | goto again; |
5106 | ||
5107 | /* Check static vs global. */ | |
03a8ea51 | 5108 | if (symbol_linkage_ != symbol_linkage::unknown) |
927aa2e7 | 5109 | { |
03a8ea51 TT |
5110 | if (symbol_linkage_ == symbol_linkage::static_) |
5111 | { | |
5112 | if ((m_block_index & SEARCH_STATIC_BLOCK) == 0) | |
5113 | goto again; | |
5114 | } | |
5115 | else | |
5116 | { | |
5117 | if ((m_block_index & SEARCH_GLOBAL_BLOCK) == 0) | |
5118 | goto again; | |
5119 | } | |
927aa2e7 JK |
5120 | } |
5121 | ||
5122 | /* Match dw2_symtab_iter_next, symbol_kind | |
5123 | and debug_names::psymbol_tag. */ | |
5124 | switch (m_domain) | |
5125 | { | |
5126 | case VAR_DOMAIN: | |
5127 | switch (indexval.dwarf_tag) | |
5128 | { | |
5129 | case DW_TAG_variable: | |
5130 | case DW_TAG_subprogram: | |
5131 | /* Some types are also in VAR_DOMAIN. */ | |
5132 | case DW_TAG_typedef: | |
5133 | case DW_TAG_structure_type: | |
5134 | break; | |
5135 | default: | |
5136 | goto again; | |
5137 | } | |
5138 | break; | |
5139 | case STRUCT_DOMAIN: | |
5140 | switch (indexval.dwarf_tag) | |
5141 | { | |
5142 | case DW_TAG_typedef: | |
5143 | case DW_TAG_structure_type: | |
5144 | break; | |
5145 | default: | |
5146 | goto again; | |
5147 | } | |
5148 | break; | |
5149 | case LABEL_DOMAIN: | |
5150 | switch (indexval.dwarf_tag) | |
5151 | { | |
5152 | case 0: | |
5153 | case DW_TAG_variable: | |
5154 | break; | |
5155 | default: | |
5156 | goto again; | |
5157 | } | |
5158 | break; | |
59c35742 AB |
5159 | case MODULE_DOMAIN: |
5160 | switch (indexval.dwarf_tag) | |
5161 | { | |
5162 | case DW_TAG_module: | |
5163 | break; | |
5164 | default: | |
5165 | goto again; | |
5166 | } | |
5167 | break; | |
927aa2e7 JK |
5168 | default: |
5169 | break; | |
5170 | } | |
5171 | ||
5172 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5173 | debug_names::psymbol_tag. */ | |
5174 | switch (m_search) | |
4b514bc8 | 5175 | { |
927aa2e7 JK |
5176 | case VARIABLES_DOMAIN: |
5177 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5178 | { |
927aa2e7 JK |
5179 | case DW_TAG_variable: |
5180 | break; | |
5181 | default: | |
5182 | goto again; | |
4b514bc8 | 5183 | } |
927aa2e7 JK |
5184 | break; |
5185 | case FUNCTIONS_DOMAIN: | |
5186 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5187 | { |
927aa2e7 JK |
5188 | case DW_TAG_subprogram: |
5189 | break; | |
5190 | default: | |
5191 | goto again; | |
4b514bc8 | 5192 | } |
927aa2e7 JK |
5193 | break; |
5194 | case TYPES_DOMAIN: | |
5195 | switch (indexval.dwarf_tag) | |
5196 | { | |
5197 | case DW_TAG_typedef: | |
5198 | case DW_TAG_structure_type: | |
5199 | break; | |
5200 | default: | |
5201 | goto again; | |
5202 | } | |
5203 | break; | |
59c35742 AB |
5204 | case MODULES_DOMAIN: |
5205 | switch (indexval.dwarf_tag) | |
5206 | { | |
5207 | case DW_TAG_module: | |
5208 | break; | |
5209 | default: | |
5210 | goto again; | |
5211 | } | |
927aa2e7 JK |
5212 | default: |
5213 | break; | |
4b514bc8 | 5214 | } |
927aa2e7 JK |
5215 | |
5216 | return per_cu; | |
4b514bc8 | 5217 | } |
61920122 | 5218 | |
927aa2e7 JK |
5219 | /* This dumps minimal information about .debug_names. It is called |
5220 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5221 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5222 | |
39298a5d TT |
5223 | void |
5224 | dwarf2_debug_names_index::dump (struct objfile *objfile) | |
927aa2e7 | 5225 | { |
976ca316 | 5226 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 5227 | |
976ca316 | 5228 | gdb_assert (per_objfile->per_bfd->using_index); |
927aa2e7 | 5229 | printf_filtered (".debug_names:"); |
976ca316 | 5230 | if (per_objfile->per_bfd->debug_names_table) |
927aa2e7 JK |
5231 | printf_filtered (" exists\n"); |
5232 | else | |
5233 | printf_filtered (" faked for \"readnow\"\n"); | |
5234 | printf_filtered ("\n"); | |
9291a0cd TT |
5235 | } |
5236 | ||
39298a5d | 5237 | void |
0b7b2c2a | 5238 | dwarf2_debug_names_index::expand_matching_symbols |
3b00ef10 TT |
5239 | (struct objfile *objfile, |
5240 | const lookup_name_info &name, domain_enum domain, | |
5241 | int global, | |
3b00ef10 TT |
5242 | symbol_compare_ftype *ordered_compare) |
5243 | { | |
976ca316 | 5244 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
3b00ef10 TT |
5245 | |
5246 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
976ca316 | 5247 | if (!per_objfile->per_bfd->debug_names_table) |
3b00ef10 TT |
5248 | return; |
5249 | ||
976ca316 | 5250 | mapped_debug_names &map = *per_objfile->per_bfd->debug_names_table; |
03a8ea51 TT |
5251 | const block_search_flags block_flags |
5252 | = global ? SEARCH_GLOBAL_BLOCK : SEARCH_STATIC_BLOCK; | |
3b00ef10 TT |
5253 | |
5254 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5255 | auto matcher = [&] (const char *symname) | |
5256 | { | |
5257 | if (ordered_compare == nullptr) | |
5258 | return true; | |
5259 | return ordered_compare (symname, match_name) == 0; | |
5260 | }; | |
5261 | ||
b64f703b | 5262 | dw2_expand_symtabs_matching_symbol (map, name, matcher, |
3b00ef10 TT |
5263 | [&] (offset_type namei) |
5264 | { | |
5265 | /* The name was matched, now expand corresponding CUs that were | |
5266 | marked. */ | |
03a8ea51 | 5267 | dw2_debug_names_iterator iter (map, block_flags, domain, namei, |
976ca316 | 5268 | per_objfile); |
3b00ef10 TT |
5269 | |
5270 | struct dwarf2_per_cu_data *per_cu; | |
5271 | while ((per_cu = iter.next ()) != NULL) | |
976ca316 | 5272 | dw2_expand_symtabs_matching_one (per_cu, per_objfile, nullptr, |
97a1449a | 5273 | nullptr); |
3b00ef10 | 5274 | return true; |
976ca316 | 5275 | }, per_objfile); |
3b00ef10 TT |
5276 | } |
5277 | ||
df35e626 | 5278 | bool |
39298a5d | 5279 | dwarf2_debug_names_index::expand_symtabs_matching |
927aa2e7 JK |
5280 | (struct objfile *objfile, |
5281 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
c1a66c06 | 5282 | const lookup_name_info *lookup_name, |
927aa2e7 JK |
5283 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
5284 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 5285 | block_search_flags search_flags, |
3bfa51a7 | 5286 | domain_enum domain, |
927aa2e7 JK |
5287 | enum search_domain kind) |
5288 | { | |
976ca316 | 5289 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
9291a0cd | 5290 | |
927aa2e7 | 5291 | /* debug_names_table is NULL if OBJF_READNOW. */ |
976ca316 | 5292 | if (!per_objfile->per_bfd->debug_names_table) |
df35e626 | 5293 | return true; |
9291a0cd | 5294 | |
976ca316 | 5295 | dw_expand_symtabs_matching_file_matcher (per_objfile, file_matcher); |
24c79950 | 5296 | |
c1a66c06 TV |
5297 | if (symbol_matcher == NULL && lookup_name == NULL) |
5298 | { | |
0d305d5c | 5299 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
c1a66c06 TV |
5300 | { |
5301 | QUIT; | |
5302 | ||
0d305d5c | 5303 | if (!dw2_expand_symtabs_matching_one (per_cu.get (), per_objfile, |
df35e626 TT |
5304 | file_matcher, |
5305 | expansion_notify)) | |
5306 | return false; | |
c1a66c06 | 5307 | } |
df35e626 | 5308 | return true; |
c1a66c06 TV |
5309 | } |
5310 | ||
976ca316 | 5311 | mapped_debug_names &map = *per_objfile->per_bfd->debug_names_table; |
bbf2f4df | 5312 | |
df35e626 TT |
5313 | bool result |
5314 | = dw2_expand_symtabs_matching_symbol (map, *lookup_name, | |
5315 | symbol_matcher, | |
5316 | [&] (offset_type namei) | |
927aa2e7 | 5317 | { |
927aa2e7 JK |
5318 | /* The name was matched, now expand corresponding CUs that were |
5319 | marked. */ | |
3bfa51a7 | 5320 | dw2_debug_names_iterator iter (map, kind, namei, per_objfile, domain); |
bbf2f4df | 5321 | |
927aa2e7 JK |
5322 | struct dwarf2_per_cu_data *per_cu; |
5323 | while ((per_cu = iter.next ()) != NULL) | |
df35e626 TT |
5324 | if (!dw2_expand_symtabs_matching_one (per_cu, per_objfile, |
5325 | file_matcher, | |
5326 | expansion_notify)) | |
5327 | return false; | |
3b00ef10 | 5328 | return true; |
976ca316 | 5329 | }, per_objfile); |
df35e626 TT |
5330 | |
5331 | return result; | |
9291a0cd TT |
5332 | } |
5333 | ||
4485a1c1 | 5334 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5989a64e | 5335 | to either a dwarf2_per_bfd or dwz_file object. */ |
4485a1c1 SM |
5336 | |
5337 | template <typename T> | |
5338 | static gdb::array_view<const gdb_byte> | |
5339 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5340 | { | |
5341 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5342 | ||
96b79293 | 5343 | if (section->empty ()) |
4485a1c1 SM |
5344 | return {}; |
5345 | ||
5346 | /* Older elfutils strip versions could keep the section in the main | |
5347 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5348 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5349 | return {}; |
5350 | ||
96b79293 | 5351 | section->read (obj); |
4485a1c1 | 5352 | |
8bebfcda PA |
5353 | /* dwarf2_section_info::size is a bfd_size_type, while |
5354 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5355 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5356 | is 32-bit. So we need an explicit narrowing conversion here. | |
5357 | This is fine, because it's impossible to allocate or mmap an | |
5358 | array/buffer larger than what size_t can represent. */ | |
5359 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5360 | } |
5361 | ||
87d6a7aa SM |
5362 | /* Lookup the index cache for the contents of the index associated to |
5363 | DWARF2_OBJ. */ | |
5364 | ||
5365 | static gdb::array_view<const gdb_byte> | |
5989a64e | 5366 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_bfd *dwarf2_per_bfd) |
87d6a7aa SM |
5367 | { |
5368 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5369 | if (build_id == nullptr) | |
5370 | return {}; | |
5371 | ||
5372 | return global_index_cache.lookup_gdb_index (build_id, | |
5989a64e | 5373 | &dwarf2_per_bfd->index_cache_res); |
87d6a7aa SM |
5374 | } |
5375 | ||
5376 | /* Same as the above, but for DWZ. */ | |
5377 | ||
5378 | static gdb::array_view<const gdb_byte> | |
5379 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5380 | { | |
5381 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5382 | if (build_id == nullptr) | |
5383 | return {}; | |
5384 | ||
5385 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5386 | } | |
5387 | ||
edc02ceb | 5388 | /* See dwarf2/public.h. */ |
9291a0cd | 5389 | |
edc02ceb TT |
5390 | void |
5391 | dwarf2_initialize_objfile (struct objfile *objfile) | |
9291a0cd | 5392 | { |
976ca316 SM |
5393 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
5394 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
ed2dc618 | 5395 | |
850ed749 SM |
5396 | dwarf_read_debug_printf ("called"); |
5397 | ||
9291a0cd TT |
5398 | /* If we're about to read full symbols, don't bother with the |
5399 | indices. In this case we also don't care if some other debug | |
5400 | format is making psymtabs, because they are all about to be | |
5401 | expanded anyway. */ | |
5402 | if ((objfile->flags & OBJF_READNOW)) | |
5403 | { | |
850ed749 SM |
5404 | dwarf_read_debug_printf ("readnow requested"); |
5405 | ||
17ee85fc TT |
5406 | /* When using READNOW, the using_index flag (set below) indicates that |
5407 | PER_BFD was already initialized, when we loaded some other objfile. */ | |
5408 | if (per_bfd->using_index) | |
5409 | { | |
850ed749 | 5410 | dwarf_read_debug_printf ("using_index already set"); |
976ca316 | 5411 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5412 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5413 | return; | |
17ee85fc TT |
5414 | } |
5415 | ||
5416 | per_bfd->using_index = 1; | |
976ca316 | 5417 | create_all_comp_units (per_objfile); |
17ee85fc TT |
5418 | per_bfd->quick_file_names_table |
5419 | = create_quick_file_names_table (per_bfd->all_comp_units.size ()); | |
976ca316 | 5420 | per_objfile->resize_symtabs (); |
9291a0cd | 5421 | |
91eea9cc | 5422 | for (int i = 0; i < per_bfd->all_comp_units.size (); ++i) |
9291a0cd | 5423 | { |
91eea9cc | 5424 | dwarf2_per_cu_data *per_cu = per_bfd->get_cu (i); |
9291a0cd | 5425 | |
17ee85fc | 5426 | per_cu->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
e254ef6a | 5427 | struct dwarf2_per_cu_quick_data); |
9291a0cd TT |
5428 | } |
5429 | ||
edc02ceb TT |
5430 | /* Arrange for gdb to see the "quick" functions. However, these |
5431 | functions will be no-ops because we will have expanded all | |
5432 | symtabs. */ | |
5433 | objfile->qf.push_front (make_dwarf_gdb_index ()); | |
5434 | return; | |
9291a0cd TT |
5435 | } |
5436 | ||
17ee85fc TT |
5437 | /* Was a debug names index already read when we processed an objfile sharing |
5438 | PER_BFD? */ | |
5439 | if (per_bfd->debug_names_table != nullptr) | |
5440 | { | |
850ed749 | 5441 | dwarf_read_debug_printf ("re-using shared debug names table"); |
976ca316 | 5442 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5443 | objfile->qf.push_front (make_dwarf_debug_names ()); |
5444 | return; | |
17ee85fc TT |
5445 | } |
5446 | ||
5447 | /* Was a GDB index already read when we processed an objfile sharing | |
5448 | PER_BFD? */ | |
5449 | if (per_bfd->index_table != nullptr) | |
5450 | { | |
850ed749 | 5451 | dwarf_read_debug_printf ("re-using shared index table"); |
976ca316 | 5452 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5453 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5454 | return; | |
17ee85fc TT |
5455 | } |
5456 | ||
efb763a5 SM |
5457 | /* There might already be partial symtabs built for this BFD. This happens |
5458 | when loading the same binary twice with the index-cache enabled. If so, | |
5459 | don't try to read an index. The objfile / per_objfile initialization will | |
5460 | be completed in dwarf2_build_psymtabs, in the standard partial symtabs | |
5461 | code path. */ | |
5462 | if (per_bfd->partial_symtabs != nullptr) | |
850ed749 SM |
5463 | { |
5464 | dwarf_read_debug_printf ("re-using shared partial symtabs"); | |
edc02ceb TT |
5465 | objfile->qf.push_front (make_lazy_dwarf_reader ()); |
5466 | return; | |
850ed749 | 5467 | } |
efb763a5 | 5468 | |
976ca316 | 5469 | if (dwarf2_read_debug_names (per_objfile)) |
3c0aa29a | 5470 | { |
850ed749 | 5471 | dwarf_read_debug_printf ("found debug names"); |
976ca316 | 5472 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5473 | objfile->qf.push_front (make_dwarf_debug_names ()); |
5474 | return; | |
3c0aa29a | 5475 | } |
927aa2e7 | 5476 | |
976ca316 | 5477 | if (dwarf2_read_gdb_index (per_objfile, |
5989a64e | 5478 | get_gdb_index_contents_from_section<struct dwarf2_per_bfd>, |
4485a1c1 | 5479 | get_gdb_index_contents_from_section<dwz_file>)) |
3c0aa29a | 5480 | { |
850ed749 | 5481 | dwarf_read_debug_printf ("found gdb index from file"); |
976ca316 | 5482 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5483 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5484 | return; | |
3c0aa29a | 5485 | } |
9291a0cd | 5486 | |
87d6a7aa | 5487 | /* ... otherwise, try to find the index in the index cache. */ |
976ca316 | 5488 | if (dwarf2_read_gdb_index (per_objfile, |
87d6a7aa SM |
5489 | get_gdb_index_contents_from_cache, |
5490 | get_gdb_index_contents_from_cache_dwz)) | |
5491 | { | |
850ed749 | 5492 | dwarf_read_debug_printf ("found gdb index from cache"); |
87d6a7aa | 5493 | global_index_cache.hit (); |
976ca316 | 5494 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5495 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5496 | return; | |
87d6a7aa SM |
5497 | } |
5498 | ||
5499 | global_index_cache.miss (); | |
edc02ceb | 5500 | objfile->qf.push_front (make_lazy_dwarf_reader ()); |
9291a0cd TT |
5501 | } |
5502 | ||
5503 | \f | |
5504 | ||
dce234bc PP |
5505 | /* Build a partial symbol table. */ |
5506 | ||
5507 | void | |
eb36a3eb | 5508 | dwarf2_build_psymtabs (struct objfile *objfile, psymbol_functions *psf) |
dce234bc | 5509 | { |
976ca316 SM |
5510 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
5511 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
17ee85fc TT |
5512 | |
5513 | if (per_bfd->partial_symtabs != nullptr) | |
5514 | { | |
5515 | /* Partial symbols were already read, so now we can simply | |
5516 | attach them. */ | |
eb36a3eb TT |
5517 | if (psf == nullptr) |
5518 | { | |
5519 | psf = new psymbol_functions (per_bfd->partial_symtabs); | |
5520 | objfile->qf.emplace_front (psf); | |
5521 | } | |
5522 | else | |
5523 | psf->set_partial_symtabs (per_bfd->partial_symtabs); | |
976ca316 | 5524 | per_objfile->resize_symtabs (); |
17ee85fc TT |
5525 | return; |
5526 | } | |
c9bf0622 | 5527 | |
eb36a3eb TT |
5528 | if (psf == nullptr) |
5529 | { | |
5530 | psf = new psymbol_functions; | |
5531 | objfile->qf.emplace_front (psf); | |
5532 | } | |
5533 | const std::shared_ptr<psymtab_storage> &partial_symtabs | |
5534 | = psf->get_partial_symtabs (); | |
5535 | ||
51962708 TT |
5536 | /* Set the local reference to partial symtabs, so that we don't try |
5537 | to read them again if reading another objfile with the same BFD. | |
5538 | If we can't in fact share, this won't make a difference anyway as | |
5539 | the dwarf2_per_bfd object won't be shared. */ | |
eb36a3eb | 5540 | per_bfd->partial_symtabs = partial_symtabs; |
51962708 | 5541 | |
a70b8144 | 5542 | try |
c9bf0622 TT |
5543 | { |
5544 | /* This isn't really ideal: all the data we allocate on the | |
5545 | objfile's obstack is still uselessly kept around. However, | |
5546 | freeing it seems unsafe. */ | |
eb36a3eb | 5547 | psymtab_discarder psymtabs (partial_symtabs.get ()); |
976ca316 | 5548 | dwarf2_build_psymtabs_hard (per_objfile); |
906768f9 | 5549 | psymtabs.keep (); |
87d6a7aa | 5550 | |
976ca316 | 5551 | per_objfile->resize_symtabs (); |
af758d11 | 5552 | |
87d6a7aa | 5553 | /* (maybe) store an index in the cache. */ |
976ca316 | 5554 | global_index_cache.store (per_objfile); |
c9bf0622 | 5555 | } |
230d2906 | 5556 | catch (const gdb_exception_error &except) |
492d29ea PA |
5557 | { |
5558 | exception_print (gdb_stderr, except); | |
5559 | } | |
c906108c | 5560 | } |
c906108c | 5561 | |
3b80fe9b DE |
5562 | /* Find the base address of the compilation unit for range lists and |
5563 | location lists. It will normally be specified by DW_AT_low_pc. | |
5564 | In DWARF-3 draft 4, the base address could be overridden by | |
5565 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5566 | compilation units with discontinuous ranges. */ | |
5567 | ||
5568 | static void | |
5569 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5570 | { | |
5571 | struct attribute *attr; | |
5572 | ||
2b24b6e4 | 5573 | cu->base_address.reset (); |
3b80fe9b DE |
5574 | |
5575 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5576 | if (attr != nullptr) |
95f982e5 | 5577 | cu->base_address = attr->as_address (); |
3b80fe9b DE |
5578 | else |
5579 | { | |
5580 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5581 | if (attr != nullptr) |
95f982e5 | 5582 | cu->base_address = attr->as_address (); |
3b80fe9b DE |
5583 | } |
5584 | } | |
5585 | ||
36586728 TT |
5586 | /* Helper function that returns the proper abbrev section for |
5587 | THIS_CU. */ | |
5588 | ||
5589 | static struct dwarf2_section_info * | |
5590 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5591 | { | |
5592 | struct dwarf2_section_info *abbrev; | |
c3699833 | 5593 | dwarf2_per_bfd *per_bfd = this_cu->per_bfd; |
36586728 TT |
5594 | |
5595 | if (this_cu->is_dwz) | |
a7308ce0 | 5596 | abbrev = &dwarf2_get_dwz_file (per_bfd, true)->abbrev; |
36586728 | 5597 | else |
c3699833 | 5598 | abbrev = &per_bfd->abbrev; |
36586728 TT |
5599 | |
5600 | return abbrev; | |
5601 | } | |
5602 | ||
f4dc4d17 DE |
5603 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5604 | ||
5605 | static sect_offset | |
976ca316 | 5606 | read_abbrev_offset (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5607 | struct dwarf2_section_info *section, |
9c541725 | 5608 | sect_offset sect_off) |
f4dc4d17 | 5609 | { |
96b79293 | 5610 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5611 | const gdb_byte *info_ptr; |
ac298888 | 5612 | unsigned int initial_length_size, offset_size; |
43988095 | 5613 | uint16_t version; |
f4dc4d17 | 5614 | |
976ca316 | 5615 | section->read (per_objfile->objfile); |
9c541725 | 5616 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5617 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5618 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5619 | info_ptr += initial_length_size; |
5620 | ||
5621 | version = read_2_bytes (abfd, info_ptr); | |
5622 | info_ptr += 2; | |
5623 | if (version >= 5) | |
5624 | { | |
5625 | /* Skip unit type and address size. */ | |
5626 | info_ptr += 2; | |
5627 | } | |
5628 | ||
24aa364d | 5629 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5630 | } |
5631 | ||
b83470bf TT |
5632 | /* A partial symtab that is used only for include files. */ |
5633 | struct dwarf2_include_psymtab : public partial_symtab | |
5634 | { | |
7b249e47 TT |
5635 | dwarf2_include_psymtab (const char *filename, |
5636 | psymtab_storage *partial_symtabs, | |
0072c873 SM |
5637 | objfile_per_bfd_storage *objfile_per_bfd) |
5638 | : partial_symtab (filename, partial_symtabs, objfile_per_bfd) | |
b83470bf TT |
5639 | { |
5640 | } | |
5641 | ||
5642 | void read_symtab (struct objfile *objfile) override | |
5643 | { | |
194d088f TV |
5644 | /* It's an include file, no symbols to read for it. |
5645 | Everything is in the includer symtab. */ | |
5646 | ||
5647 | /* The expansion of a dwarf2_include_psymtab is just a trigger for | |
5648 | expansion of the includer psymtab. We use the dependencies[0] field to | |
5649 | model the includer. But if we go the regular route of calling | |
5650 | expand_psymtab here, and having expand_psymtab call expand_dependencies | |
5651 | to expand the includer, we'll only use expand_psymtab on the includer | |
5652 | (making it a non-toplevel psymtab), while if we expand the includer via | |
5653 | another path, we'll use read_symtab (making it a toplevel psymtab). | |
5654 | So, don't pretend a dwarf2_include_psymtab is an actual toplevel | |
5655 | psymtab, and trigger read_symtab on the includer here directly. */ | |
5656 | includer ()->read_symtab (objfile); | |
b83470bf TT |
5657 | } |
5658 | ||
5659 | void expand_psymtab (struct objfile *objfile) override | |
5660 | { | |
194d088f TV |
5661 | /* This is not called by read_symtab, and should not be called by any |
5662 | expand_dependencies. */ | |
5663 | gdb_assert (false); | |
b83470bf TT |
5664 | } |
5665 | ||
5717c425 | 5666 | bool readin_p (struct objfile *objfile) const override |
b83470bf | 5667 | { |
5717c425 | 5668 | return includer ()->readin_p (objfile); |
b83470bf TT |
5669 | } |
5670 | ||
5717c425 | 5671 | compunit_symtab *get_compunit_symtab (struct objfile *objfile) const override |
b83470bf TT |
5672 | { |
5673 | return nullptr; | |
5674 | } | |
5675 | ||
5676 | private: | |
194d088f TV |
5677 | partial_symtab *includer () const |
5678 | { | |
5679 | /* An include psymtab has exactly one dependency: the psymtab that | |
5680 | includes it. */ | |
5681 | gdb_assert (this->number_of_dependencies == 1); | |
5682 | return this->dependencies[0]; | |
5683 | } | |
b83470bf TT |
5684 | }; |
5685 | ||
aaa75496 JB |
5686 | /* Allocate a new partial symtab for file named NAME and mark this new |
5687 | partial symtab as being an include of PST. */ | |
5688 | ||
5689 | static void | |
84685904 | 5690 | dwarf2_create_include_psymtab (dwarf2_per_bfd *per_bfd, |
7b249e47 TT |
5691 | const char *name, |
5692 | dwarf2_psymtab *pst, | |
5693 | psymtab_storage *partial_symtabs, | |
0072c873 | 5694 | objfile_per_bfd_storage *objfile_per_bfd) |
aaa75496 | 5695 | { |
7b249e47 | 5696 | dwarf2_include_psymtab *subpst |
0072c873 | 5697 | = new dwarf2_include_psymtab (name, partial_symtabs, objfile_per_bfd); |
aaa75496 | 5698 | |
fbd9ab74 | 5699 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
45940949 | 5700 | subpst->dirname = pst->dirname; |
fbd9ab74 | 5701 | |
84685904 | 5702 | subpst->dependencies = per_bfd->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
5703 | subpst->dependencies[0] = pst; |
5704 | subpst->number_of_dependencies = 1; | |
aaa75496 JB |
5705 | } |
5706 | ||
5707 | /* Read the Line Number Program data and extract the list of files | |
5708 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5709 | partial symtab for each of these included files. */ |
aaa75496 JB |
5710 | |
5711 | static void | |
5712 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 5713 | struct die_info *die, |
891813be | 5714 | dwarf2_psymtab *pst) |
aaa75496 | 5715 | { |
fff8551c | 5716 | line_header_up lh; |
d85a05f0 | 5717 | struct attribute *attr; |
aaa75496 | 5718 | |
d85a05f0 | 5719 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
d4df075e TT |
5720 | if (attr != nullptr && attr->form_is_unsigned ()) |
5721 | lh = dwarf_decode_line_header ((sect_offset) attr->as_unsigned (), cu); | |
aaa75496 JB |
5722 | if (lh == NULL) |
5723 | return; /* No linetable, so no includes. */ | |
5724 | ||
79748972 TT |
5725 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
5726 | that we pass in the raw text_low here; that is ok because we're | |
5727 | only decoding the line table to make include partial symtabs, and | |
5728 | so the addresses aren't really used. */ | |
4ae976d1 | 5729 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 5730 | pst->raw_text_low (), 1); |
aaa75496 JB |
5731 | } |
5732 | ||
348e048f | 5733 | static hashval_t |
52dc124a | 5734 | hash_signatured_type (const void *item) |
348e048f | 5735 | { |
9a3c8263 SM |
5736 | const struct signatured_type *sig_type |
5737 | = (const struct signatured_type *) item; | |
9a619af0 | 5738 | |
348e048f | 5739 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5740 | return sig_type->signature; |
348e048f DE |
5741 | } |
5742 | ||
5743 | static int | |
52dc124a | 5744 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5745 | { |
9a3c8263 SM |
5746 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5747 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5748 | |
348e048f DE |
5749 | return lhs->signature == rhs->signature; |
5750 | } | |
5751 | ||
1fd400ff TT |
5752 | /* Allocate a hash table for signatured types. */ |
5753 | ||
b0b6a987 | 5754 | static htab_up |
298e9637 | 5755 | allocate_signatured_type_table () |
1fd400ff | 5756 | { |
b0b6a987 TT |
5757 | return htab_up (htab_create_alloc (41, |
5758 | hash_signatured_type, | |
5759 | eq_signatured_type, | |
5760 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
5761 | } |
5762 | ||
78d4d2c5 | 5763 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5764 | and fill them into TYPES_HTAB. It will process only type units, |
5765 | therefore DW_UT_type. */ | |
c88ee1f0 | 5766 | |
78d4d2c5 | 5767 | static void |
976ca316 | 5768 | create_debug_type_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5769 | struct dwo_file *dwo_file, |
b0b6a987 | 5770 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 5771 | rcuh_kind section_kind) |
348e048f | 5772 | { |
976ca316 | 5773 | struct objfile *objfile = per_objfile->objfile; |
4bdcc0c1 | 5774 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5775 | bfd *abfd; |
5776 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5777 | |
b8efb248 | 5778 | abbrev_section = &dwo_file->sections.abbrev; |
4bdcc0c1 | 5779 | |
4800761a | 5780 | dwarf_read_debug_printf ("Reading %s for %s", |
6f738b01 SM |
5781 | section->get_name (), |
5782 | abbrev_section->get_file_name ()); | |
09406207 | 5783 | |
96b79293 | 5784 | section->read (objfile); |
78d4d2c5 | 5785 | info_ptr = section->buffer; |
348e048f | 5786 | |
78d4d2c5 JK |
5787 | if (info_ptr == NULL) |
5788 | return; | |
348e048f | 5789 | |
78d4d2c5 JK |
5790 | /* We can't set abfd until now because the section may be empty or |
5791 | not present, in which case the bfd is unknown. */ | |
96b79293 | 5792 | abfd = section->get_bfd_owner (); |
348e048f | 5793 | |
c0ab21c2 TT |
5794 | /* We don't use cutu_reader here because we don't need to read |
5795 | any dies: the signature is in the header. */ | |
3019eac3 | 5796 | |
78d4d2c5 JK |
5797 | end_ptr = info_ptr + section->size; |
5798 | while (info_ptr < end_ptr) | |
5799 | { | |
0d305d5c | 5800 | std::unique_ptr<signatured_type> sig_type; |
78d4d2c5 JK |
5801 | struct dwo_unit *dwo_tu; |
5802 | void **slot; | |
5803 | const gdb_byte *ptr = info_ptr; | |
5804 | struct comp_unit_head header; | |
5805 | unsigned int length; | |
8b70b953 | 5806 | |
9c541725 | 5807 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5808 | |
a49dd8dd JK |
5809 | /* Initialize it due to a false compiler warning. */ |
5810 | header.signature = -1; | |
9c541725 | 5811 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5812 | |
78d4d2c5 JK |
5813 | /* We need to read the type's signature in order to build the hash |
5814 | table, but we don't need anything else just yet. */ | |
348e048f | 5815 | |
976ca316 | 5816 | ptr = read_and_check_comp_unit_head (per_objfile, &header, section, |
43988095 | 5817 | abbrev_section, ptr, section_kind); |
348e048f | 5818 | |
4057dfde | 5819 | length = header.get_length (); |
6caca83c | 5820 | |
78d4d2c5 JK |
5821 | /* Skip dummy type units. */ |
5822 | if (ptr >= info_ptr + length | |
43988095 | 5823 | || peek_abbrev_code (abfd, ptr) == 0 |
d2854d8d CT |
5824 | || (header.unit_type != DW_UT_type |
5825 | && header.unit_type != DW_UT_split_type)) | |
78d4d2c5 JK |
5826 | { |
5827 | info_ptr += length; | |
5828 | continue; | |
5829 | } | |
dee91e82 | 5830 | |
78d4d2c5 | 5831 | if (types_htab == NULL) |
b8efb248 | 5832 | types_htab = allocate_dwo_unit_table (); |
8b70b953 | 5833 | |
b8efb248 TT |
5834 | dwo_tu = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, dwo_unit); |
5835 | dwo_tu->dwo_file = dwo_file; | |
5836 | dwo_tu->signature = header.signature; | |
5837 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; | |
5838 | dwo_tu->section = section; | |
5839 | dwo_tu->sect_off = sect_off; | |
5840 | dwo_tu->length = length; | |
78d4d2c5 | 5841 | |
b8efb248 | 5842 | slot = htab_find_slot (types_htab.get (), dwo_tu, INSERT); |
78d4d2c5 JK |
5843 | gdb_assert (slot != NULL); |
5844 | if (*slot != NULL) | |
b8efb248 TT |
5845 | complaint (_("debug type entry at offset %s is duplicate to" |
5846 | " the entry at offset %s, signature %s"), | |
5847 | sect_offset_str (sect_off), | |
5848 | sect_offset_str (dwo_tu->sect_off), | |
5849 | hex_string (header.signature)); | |
5850 | *slot = dwo_tu; | |
3019eac3 | 5851 | |
6f738b01 SM |
5852 | dwarf_read_debug_printf_v (" offset %s, signature %s", |
5853 | sect_offset_str (sect_off), | |
5854 | hex_string (header.signature)); | |
3019eac3 | 5855 | |
78d4d2c5 JK |
5856 | info_ptr += length; |
5857 | } | |
5858 | } | |
3019eac3 | 5859 | |
78d4d2c5 JK |
5860 | /* Create the hash table of all entries in the .debug_types |
5861 | (or .debug_types.dwo) section(s). | |
b8efb248 | 5862 | DWO_FILE is a pointer to the DWO file object. |
b3c8eb43 | 5863 | |
78d4d2c5 | 5864 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5865 | |
78d4d2c5 | 5866 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5867 | |
78d4d2c5 | 5868 | static void |
976ca316 | 5869 | create_debug_types_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5870 | struct dwo_file *dwo_file, |
fd5866f6 | 5871 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 5872 | htab_up &types_htab) |
78d4d2c5 | 5873 | { |
fd5866f6 | 5874 | for (dwarf2_section_info §ion : type_sections) |
976ca316 SM |
5875 | create_debug_type_hash_table (per_objfile, dwo_file, §ion, types_htab, |
5876 | rcuh_kind::TYPE); | |
3019eac3 DE |
5877 | } |
5878 | ||
5989a64e | 5879 | /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types. |
6aa5f3a6 DE |
5880 | If SLOT is non-NULL, it is the entry to use in the hash table. |
5881 | Otherwise we find one. */ | |
5882 | ||
5883 | static struct signatured_type * | |
976ca316 | 5884 | add_type_unit (dwarf2_per_objfile *per_objfile, ULONGEST sig, void **slot) |
6aa5f3a6 | 5885 | { |
91eea9cc TT |
5886 | if (per_objfile->per_bfd->all_comp_units.size () |
5887 | == per_objfile->per_bfd->all_comp_units.capacity ()) | |
976ca316 | 5888 | ++per_objfile->per_bfd->tu_stats.nr_all_type_units_reallocs; |
6aa5f3a6 | 5889 | |
0d305d5c TT |
5890 | std::unique_ptr<signatured_type> sig_type_holder |
5891 | = per_objfile->per_bfd->allocate_signatured_type (); | |
5892 | signatured_type *sig_type = sig_type_holder.get (); | |
b2bdb8cf | 5893 | |
976ca316 | 5894 | per_objfile->resize_symtabs (); |
af758d11 | 5895 | |
473ab964 TT |
5896 | per_objfile->per_bfd->all_comp_units.emplace_back |
5897 | (sig_type_holder.release ()); | |
6aa5f3a6 | 5898 | sig_type->signature = sig; |
0d305d5c | 5899 | sig_type->is_debug_types = 1; |
976ca316 | 5900 | if (per_objfile->per_bfd->using_index) |
6aa5f3a6 | 5901 | { |
0d305d5c | 5902 | sig_type->v.quick = |
976ca316 | 5903 | OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, |
6aa5f3a6 DE |
5904 | struct dwarf2_per_cu_quick_data); |
5905 | } | |
5906 | ||
5907 | if (slot == NULL) | |
5908 | { | |
976ca316 | 5909 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 DE |
5910 | sig_type, INSERT); |
5911 | } | |
5912 | gdb_assert (*slot == NULL); | |
5913 | *slot = sig_type; | |
5914 | /* The rest of sig_type must be filled in by the caller. */ | |
5915 | return sig_type; | |
5916 | } | |
5917 | ||
a2ce51a0 DE |
5918 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5919 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5920 | ||
5921 | static void | |
976ca316 | 5922 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile *per_objfile, |
a2ce51a0 DE |
5923 | struct signatured_type *sig_entry, |
5924 | struct dwo_unit *dwo_entry) | |
5925 | { | |
976ca316 | 5926 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
1859c670 | 5927 | |
7ee85ab1 | 5928 | /* Make sure we're not clobbering something we don't expect to. */ |
0d305d5c TT |
5929 | gdb_assert (! sig_entry->queued); |
5930 | gdb_assert (per_objfile->get_cu (sig_entry) == NULL); | |
1859c670 | 5931 | if (per_bfd->using_index) |
6aa5f3a6 | 5932 | { |
0d305d5c TT |
5933 | gdb_assert (sig_entry->v.quick != NULL); |
5934 | gdb_assert (!per_objfile->symtab_set_p (sig_entry)); | |
6aa5f3a6 DE |
5935 | } |
5936 | else | |
0d305d5c | 5937 | gdb_assert (sig_entry->v.psymtab == NULL); |
a2ce51a0 | 5938 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5939 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5940 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5941 | gdb_assert (sig_entry->dwo_unit == NULL); |
5942 | ||
0d305d5c TT |
5943 | sig_entry->section = dwo_entry->section; |
5944 | sig_entry->sect_off = dwo_entry->sect_off; | |
5945 | sig_entry->length = dwo_entry->length; | |
5946 | sig_entry->reading_dwo_directly = 1; | |
5947 | sig_entry->per_bfd = per_bfd; | |
a2ce51a0 DE |
5948 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5949 | sig_entry->dwo_unit = dwo_entry; | |
5950 | } | |
5951 | ||
5952 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5953 | If we haven't read the TU yet, create the signatured_type data structure |
5954 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5955 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5956 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5957 | containing that CU. Otherwise we could end up reading several other DWO | |
5958 | files (due to comdat folding) to process the transitive closure of all the | |
5959 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5960 | type signature that it needs. | |
a2ce51a0 DE |
5961 | We only do this for .gdb_index because in the psymtab case we already have |
5962 | to read all the DWOs to build the type unit groups. */ | |
5963 | ||
5964 | static struct signatured_type * | |
5965 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5966 | { | |
976ca316 | 5967 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a2ce51a0 DE |
5968 | struct dwo_file *dwo_file; |
5969 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5970 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5971 | void **slot; |
a2ce51a0 | 5972 | |
976ca316 | 5973 | gdb_assert (cu->dwo_unit && per_objfile->per_bfd->using_index); |
a2ce51a0 | 5974 | |
6aa5f3a6 DE |
5975 | /* If TU skeletons have been removed then we may not have read in any |
5976 | TUs yet. */ | |
976ca316 SM |
5977 | if (per_objfile->per_bfd->signatured_types == NULL) |
5978 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
a2ce51a0 DE |
5979 | |
5980 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5981 | Use the global signatured_types array to do our own comdat-folding |
5982 | of types. If this is the first time we're reading this TU, and | |
5983 | the TU has an entry in .gdb_index, replace the recorded data from | |
5984 | .gdb_index with this TU. */ | |
a2ce51a0 | 5985 | |
a2ce51a0 | 5986 | find_sig_entry.signature = sig; |
976ca316 | 5987 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 | 5988 | &find_sig_entry, INSERT); |
9a3c8263 | 5989 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5990 | |
5991 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5992 | read. Don't reassign the global entry to point to this DWO if that's |
5993 | the case. Also note that if the TU is already being read, it may not | |
5994 | have come from a DWO, the program may be a mix of Fission-compiled | |
5995 | code and non-Fission-compiled code. */ | |
5996 | ||
5997 | /* Have we already tried to read this TU? | |
5998 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5999 | needn't exist in the global table yet). */ | |
0d305d5c | 6000 | if (sig_entry != NULL && sig_entry->tu_read) |
a2ce51a0 DE |
6001 | return sig_entry; |
6002 | ||
6aa5f3a6 DE |
6003 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6004 | dwo_unit of the TU itself. */ | |
6005 | dwo_file = cu->dwo_unit->dwo_file; | |
6006 | ||
a2ce51a0 DE |
6007 | /* Ok, this is the first time we're reading this TU. */ |
6008 | if (dwo_file->tus == NULL) | |
6009 | return NULL; | |
6010 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6011 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6012 | &find_dwo_entry); | |
a2ce51a0 DE |
6013 | if (dwo_entry == NULL) |
6014 | return NULL; | |
6015 | ||
6aa5f3a6 DE |
6016 | /* If the global table doesn't have an entry for this TU, add one. */ |
6017 | if (sig_entry == NULL) | |
976ca316 | 6018 | sig_entry = add_type_unit (per_objfile, sig, slot); |
6aa5f3a6 | 6019 | |
976ca316 | 6020 | fill_in_sig_entry_from_dwo_entry (per_objfile, sig_entry, dwo_entry); |
0d305d5c | 6021 | sig_entry->tu_read = 1; |
a2ce51a0 DE |
6022 | return sig_entry; |
6023 | } | |
6024 | ||
a2ce51a0 DE |
6025 | /* Subroutine of lookup_signatured_type. |
6026 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6027 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6028 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6029 | |
6030 | static struct signatured_type * | |
6031 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6032 | { | |
976ca316 SM |
6033 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6034 | struct dwp_file *dwp_file = get_dwp_file (per_objfile); | |
a2ce51a0 DE |
6035 | struct dwo_unit *dwo_entry; |
6036 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6037 | void **slot; |
a2ce51a0 | 6038 | |
976ca316 | 6039 | gdb_assert (cu->dwo_unit && per_objfile->per_bfd->using_index); |
a2ce51a0 DE |
6040 | gdb_assert (dwp_file != NULL); |
6041 | ||
6aa5f3a6 DE |
6042 | /* If TU skeletons have been removed then we may not have read in any |
6043 | TUs yet. */ | |
976ca316 SM |
6044 | if (per_objfile->per_bfd->signatured_types == NULL) |
6045 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
a2ce51a0 | 6046 | |
6aa5f3a6 | 6047 | find_sig_entry.signature = sig; |
976ca316 | 6048 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 | 6049 | &find_sig_entry, INSERT); |
9a3c8263 | 6050 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6051 | |
6052 | /* Have we already tried to read this TU? | |
6053 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6054 | needn't exist in the global table yet). */ | |
6055 | if (sig_entry != NULL) | |
6056 | return sig_entry; | |
6057 | ||
a2ce51a0 DE |
6058 | if (dwp_file->tus == NULL) |
6059 | return NULL; | |
976ca316 SM |
6060 | dwo_entry = lookup_dwo_unit_in_dwp (per_objfile, dwp_file, NULL, sig, |
6061 | 1 /* is_debug_types */); | |
a2ce51a0 DE |
6062 | if (dwo_entry == NULL) |
6063 | return NULL; | |
6064 | ||
976ca316 SM |
6065 | sig_entry = add_type_unit (per_objfile, sig, slot); |
6066 | fill_in_sig_entry_from_dwo_entry (per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6067 | |
a2ce51a0 DE |
6068 | return sig_entry; |
6069 | } | |
6070 | ||
380bca97 | 6071 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6072 | Returns NULL if signature SIG is not present in the table. |
6073 | It is up to the caller to complain about this. */ | |
348e048f DE |
6074 | |
6075 | static struct signatured_type * | |
a2ce51a0 | 6076 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6077 | { |
976ca316 | 6078 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 6079 | |
976ca316 | 6080 | if (cu->dwo_unit && per_objfile->per_bfd->using_index) |
a2ce51a0 DE |
6081 | { |
6082 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6083 | These cases require special processing. */ | |
976ca316 | 6084 | if (get_dwp_file (per_objfile) == NULL) |
a2ce51a0 DE |
6085 | return lookup_dwo_signatured_type (cu, sig); |
6086 | else | |
6087 | return lookup_dwp_signatured_type (cu, sig); | |
6088 | } | |
6089 | else | |
6090 | { | |
6091 | struct signatured_type find_entry, *entry; | |
348e048f | 6092 | |
976ca316 | 6093 | if (per_objfile->per_bfd->signatured_types == NULL) |
a2ce51a0 DE |
6094 | return NULL; |
6095 | find_entry.signature = sig; | |
9a3c8263 | 6096 | entry = ((struct signatured_type *) |
976ca316 | 6097 | htab_find (per_objfile->per_bfd->signatured_types.get (), |
b0b6a987 | 6098 | &find_entry)); |
a2ce51a0 DE |
6099 | return entry; |
6100 | } | |
348e048f | 6101 | } |
18a8505e | 6102 | |
42e7ad6c | 6103 | /* Low level DIE reading support. */ |
348e048f | 6104 | |
d85a05f0 DJ |
6105 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6106 | ||
6107 | static void | |
6108 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6109 | struct dwarf2_cu *cu, |
3019eac3 | 6110 | struct dwarf2_section_info *section, |
685af9cd TT |
6111 | struct dwo_file *dwo_file, |
6112 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6113 | { |
fceca515 | 6114 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6115 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6116 | reader->cu = cu; |
3019eac3 | 6117 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6118 | reader->die_section = section; |
6119 | reader->buffer = section->buffer; | |
f664829e | 6120 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6121 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6122 | } |
6123 | ||
c0ab21c2 | 6124 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6125 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6126 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6127 | already. |
6128 | ||
6129 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6130 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6131 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6132 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6133 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6134 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6135 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6136 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6137 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6138 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6139 | kept around for at least as long as *RESULT_READER. | |
6140 | ||
b0c7bfa9 DE |
6141 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6142 | ||
6143 | static int | |
4ab09049 | 6144 | read_cutu_die_from_dwo (dwarf2_cu *cu, |
b0c7bfa9 | 6145 | struct dwo_unit *dwo_unit, |
b0c7bfa9 | 6146 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6147 | const char *stub_comp_dir, |
b0c7bfa9 | 6148 | struct die_reader_specs *result_reader, |
d521ce57 | 6149 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6150 | struct die_info **result_comp_unit_die, |
685af9cd | 6151 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6152 | { |
976ca316 | 6153 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
4ab09049 | 6154 | dwarf2_per_cu_data *per_cu = cu->per_cu; |
976ca316 | 6155 | struct objfile *objfile = per_objfile->objfile; |
b0c7bfa9 | 6156 | bfd *abfd; |
d521ce57 | 6157 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6158 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6159 | int i,num_extra_attrs; | |
6160 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6161 | struct die_info *comp_unit_die; |
6162 | ||
b0aeadb3 DE |
6163 | /* At most one of these may be provided. */ |
6164 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6165 | |
b0c7bfa9 DE |
6166 | /* These attributes aren't processed until later: |
6167 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6168 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6169 | referenced later. However, these attributes are found in the stub | |
6170 | which we won't have later. In order to not impose this complication | |
6171 | on the rest of the code, we read them here and copy them to the | |
6172 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6173 | |
6174 | stmt_list = NULL; | |
6175 | low_pc = NULL; | |
6176 | high_pc = NULL; | |
6177 | ranges = NULL; | |
6178 | comp_dir = NULL; | |
6179 | ||
6180 | if (stub_comp_unit_die != NULL) | |
6181 | { | |
6182 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6183 | DWO file. */ | |
4ab09049 | 6184 | if (!per_cu->is_debug_types) |
b0c7bfa9 DE |
6185 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); |
6186 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6187 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6188 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6189 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6190 | ||
a39fdb41 | 6191 | cu->addr_base = stub_comp_unit_die->addr_base (); |
b0c7bfa9 | 6192 | |
2b0c7f41 SM |
6193 | /* There should be a DW_AT_GNU_ranges_base attribute here (if needed). |
6194 | We need the value before we can process DW_AT_ranges values from the | |
6195 | DWO. */ | |
6196 | cu->gnu_ranges_base = stub_comp_unit_die->gnu_ranges_base (); | |
6197 | ||
6198 | /* For DWARF5: record the DW_AT_rnglists_base value from the skeleton. If | |
6199 | there are attributes of form DW_FORM_rnglistx in the skeleton, they'll | |
6200 | need the rnglists base. Attributes of form DW_FORM_rnglistx in the | |
6201 | split unit don't use it, as the DWO has its own .debug_rnglists.dwo | |
6202 | section. */ | |
6203 | cu->rnglists_base = stub_comp_unit_die->rnglists_base (); | |
b0c7bfa9 | 6204 | } |
a2ce51a0 DE |
6205 | else if (stub_comp_dir != NULL) |
6206 | { | |
6207 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
fe56917a | 6208 | comp_dir = OBSTACK_ZALLOC (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6209 | comp_dir->name = DW_AT_comp_dir; |
6210 | comp_dir->form = DW_FORM_string; | |
c6481205 | 6211 | comp_dir->set_string_noncanonical (stub_comp_dir); |
a2ce51a0 | 6212 | } |
b0c7bfa9 DE |
6213 | |
6214 | /* Set up for reading the DWO CU/TU. */ | |
6215 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6216 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6217 | section->read (objfile); |
6218 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6219 | begin_info_ptr = info_ptr = (section->buffer |
6220 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6221 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 | 6222 | |
4ab09049 | 6223 | if (per_cu->is_debug_types) |
b0c7bfa9 | 6224 | { |
4ab09049 | 6225 | signatured_type *sig_type = (struct signatured_type *) per_cu; |
b0c7bfa9 | 6226 | |
976ca316 SM |
6227 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6228 | section, dwo_abbrev_section, | |
43988095 | 6229 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6230 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6231 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6232 | { |
6233 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6234 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6235 | hex_string (sig_type->signature), |
43988095 | 6236 | hex_string (cu->header.signature), |
9d8780f0 | 6237 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6238 | bfd_get_filename (abfd)); |
6239 | } | |
9c541725 | 6240 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6241 | /* For DWOs coming from DWP files, we don't know the CU length |
6242 | nor the type's offset in the TU until now. */ | |
4057dfde | 6243 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6244 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6245 | |
6246 | /* Establish the type offset that can be used to lookup the type. | |
6247 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6248 | sig_type->type_offset_in_section |
6249 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6250 | } |
6251 | else | |
6252 | { | |
976ca316 SM |
6253 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6254 | section, dwo_abbrev_section, | |
43988095 | 6255 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6256 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6257 | /* For DWOs coming from DWP files, we don't know the CU length |
6258 | until now. */ | |
4057dfde | 6259 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6260 | } |
6261 | ||
606decb2 | 6262 | dwo_abbrev_section->read (objfile); |
685af9cd | 6263 | *result_dwo_abbrev_table |
606decb2 | 6264 | = abbrev_table::read (dwo_abbrev_section, cu->header.abbrev_sect_off); |
685af9cd TT |
6265 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6266 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6267 | |
6268 | /* Read in the die, but leave space to copy over the attributes | |
6269 | from the stub. This has the benefit of simplifying the rest of | |
6270 | the code - all the work to maintain the illusion of a single | |
6271 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6272 | num_extra_attrs = ((stmt_list != NULL) | |
6273 | + (low_pc != NULL) | |
6274 | + (high_pc != NULL) | |
6275 | + (ranges != NULL) | |
6276 | + (comp_dir != NULL)); | |
6277 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6278 | num_extra_attrs); |
b0c7bfa9 DE |
6279 | |
6280 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6281 | comp_unit_die = *result_comp_unit_die; | |
6282 | i = comp_unit_die->num_attrs; | |
6283 | if (stmt_list != NULL) | |
6284 | comp_unit_die->attrs[i++] = *stmt_list; | |
6285 | if (low_pc != NULL) | |
6286 | comp_unit_die->attrs[i++] = *low_pc; | |
6287 | if (high_pc != NULL) | |
6288 | comp_unit_die->attrs[i++] = *high_pc; | |
6289 | if (ranges != NULL) | |
6290 | comp_unit_die->attrs[i++] = *ranges; | |
6291 | if (comp_dir != NULL) | |
6292 | comp_unit_die->attrs[i++] = *comp_dir; | |
6293 | comp_unit_die->num_attrs += num_extra_attrs; | |
6294 | ||
b4f54984 | 6295 | if (dwarf_die_debug) |
bf6af496 DE |
6296 | { |
6297 | fprintf_unfiltered (gdb_stdlog, | |
6298 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6299 | section->get_name (), |
bf6af496 DE |
6300 | (unsigned) (begin_info_ptr - section->buffer), |
6301 | bfd_get_filename (abfd)); | |
b4f54984 | 6302 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6303 | } |
6304 | ||
b0c7bfa9 DE |
6305 | /* Skip dummy compilation units. */ |
6306 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6307 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6308 | return 0; | |
6309 | ||
6310 | *result_info_ptr = info_ptr; | |
6311 | return 1; | |
6312 | } | |
6313 | ||
a084a2a6 AT |
6314 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6315 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6316 | signature is part of the header. */ | |
6317 | static gdb::optional<ULONGEST> | |
6318 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6319 | { | |
6320 | if (cu->header.version >= 5) | |
6321 | return cu->header.signature; | |
6322 | struct attribute *attr; | |
6323 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
529908cb | 6324 | if (attr == nullptr || !attr->form_is_unsigned ()) |
a084a2a6 | 6325 | return gdb::optional<ULONGEST> (); |
529908cb | 6326 | return attr->as_unsigned (); |
a084a2a6 AT |
6327 | } |
6328 | ||
c0ab21c2 | 6329 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6330 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6331 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6332 | |
6333 | static struct dwo_unit * | |
4ab09049 | 6334 | lookup_dwo_unit (dwarf2_cu *cu, die_info *comp_unit_die, const char *dwo_name) |
b0c7bfa9 | 6335 | { |
4ab09049 | 6336 | dwarf2_per_cu_data *per_cu = cu->per_cu; |
b0c7bfa9 | 6337 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6338 | const char *comp_dir; |
b0c7bfa9 | 6339 | |
a2ce51a0 DE |
6340 | gdb_assert (cu != NULL); |
6341 | ||
b0c7bfa9 | 6342 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6343 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6344 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 | 6345 | |
4ab09049 SM |
6346 | if (per_cu->is_debug_types) |
6347 | dwo_unit = lookup_dwo_type_unit (cu, dwo_name, comp_dir); | |
b0c7bfa9 DE |
6348 | else |
6349 | { | |
a084a2a6 | 6350 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
4ab09049 | 6351 | |
a084a2a6 | 6352 | if (!signature.has_value ()) |
b0c7bfa9 DE |
6353 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6354 | " [in module %s]"), | |
4ab09049 SM |
6355 | dwo_name, bfd_get_filename (per_cu->per_bfd->obfd)); |
6356 | ||
6357 | dwo_unit = lookup_dwo_comp_unit (cu, dwo_name, comp_dir, *signature); | |
b0c7bfa9 DE |
6358 | } |
6359 | ||
b0c7bfa9 DE |
6360 | return dwo_unit; |
6361 | } | |
6362 | ||
c0ab21c2 | 6363 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6364 | See it for a description of the parameters. |
fcd3b13d | 6365 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6366 | |
c0ab21c2 | 6367 | void |
9e021579 SM |
6368 | cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data *this_cu, |
6369 | dwarf2_per_objfile *per_objfile, | |
2e671100 | 6370 | dwarf2_cu *existing_cu) |
a2ce51a0 | 6371 | { |
a2ce51a0 | 6372 | struct signatured_type *sig_type; |
a2ce51a0 DE |
6373 | |
6374 | /* Verify we can do the following downcast, and that we have the | |
6375 | data we need. */ | |
6376 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6377 | sig_type = (struct signatured_type *) this_cu; | |
6378 | gdb_assert (sig_type->dwo_unit != NULL); | |
6379 | ||
2e671100 SM |
6380 | dwarf2_cu *cu; |
6381 | ||
6382 | if (existing_cu != nullptr) | |
6aa5f3a6 | 6383 | { |
2e671100 SM |
6384 | cu = existing_cu; |
6385 | gdb_assert (cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6386 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6387 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6388 | } |
6389 | else | |
6390 | { | |
7188ed02 | 6391 | /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu |
dda83cd7 | 6392 | in per_objfile yet. */ |
7188ed02 | 6393 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
9e021579 | 6394 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); |
2e671100 | 6395 | cu = m_new_cu.get (); |
6aa5f3a6 DE |
6396 | } |
6397 | ||
6398 | /* A future optimization, if needed, would be to use an existing | |
6399 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6400 | could share abbrev tables. */ | |
a2ce51a0 | 6401 | |
2e671100 | 6402 | if (read_cutu_die_from_dwo (cu, sig_type->dwo_unit, |
a2ce51a0 DE |
6403 | NULL /* stub_comp_unit_die */, |
6404 | sig_type->dwo_unit->dwo_file->comp_dir, | |
4ebe4877 | 6405 | this, &info_ptr, |
3e225074 | 6406 | &comp_unit_die, |
c0ab21c2 | 6407 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6408 | { |
6409 | /* Dummy die. */ | |
c0ab21c2 | 6410 | dummy_p = true; |
a2ce51a0 | 6411 | } |
a2ce51a0 DE |
6412 | } |
6413 | ||
fd820528 | 6414 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6415 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6416 | |
f4dc4d17 DE |
6417 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6418 | Otherwise the table specified in the comp unit header is read in and used. | |
6419 | This is an optimization for when we already have the abbrev table. | |
6420 | ||
2e671100 SM |
6421 | If EXISTING_CU is non-NULL, then use it. Otherwise, a new CU is |
6422 | allocated. */ | |
aaa75496 | 6423 | |
ab432490 | 6424 | cutu_reader::cutu_reader (dwarf2_per_cu_data *this_cu, |
976ca316 | 6425 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 | 6426 | struct abbrev_table *abbrev_table, |
2e671100 | 6427 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
6428 | bool skip_partial) |
6429 | : die_reader_specs {}, | |
6751ebae | 6430 | m_this_cu (this_cu) |
c906108c | 6431 | { |
976ca316 | 6432 | struct objfile *objfile = per_objfile->objfile; |
8a0459fd | 6433 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6434 | bfd *abfd = section->get_bfd_owner (); |
c0ab21c2 | 6435 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6436 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6437 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6438 | /* Non-zero if CU currently points to a DWO file and we need to |
6439 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6440 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6441 | int rereading_dwo_cu = 0; |
c906108c | 6442 | |
b4f54984 | 6443 | if (dwarf_die_debug) |
9d8780f0 | 6444 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6445 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6446 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6447 | |
a2ce51a0 DE |
6448 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6449 | file (instead of going through the stub), short-circuit all of this. */ | |
6450 | if (this_cu->reading_dwo_directly) | |
6451 | { | |
6452 | /* Narrow down the scope of possibilities to have to understand. */ | |
6453 | gdb_assert (this_cu->is_debug_types); | |
6454 | gdb_assert (abbrev_table == NULL); | |
976ca316 | 6455 | init_tu_and_read_dwo_dies (this_cu, per_objfile, existing_cu); |
a2ce51a0 DE |
6456 | return; |
6457 | } | |
6458 | ||
dee91e82 | 6459 | /* This is cheap if the section is already read in. */ |
96b79293 | 6460 | section->read (objfile); |
dee91e82 | 6461 | |
9c541725 | 6462 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6463 | |
6464 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 6465 | |
2e671100 SM |
6466 | dwarf2_cu *cu; |
6467 | ||
6468 | if (existing_cu != nullptr) | |
dee91e82 | 6469 | { |
2e671100 | 6470 | cu = existing_cu; |
42e7ad6c DE |
6471 | /* If this CU is from a DWO file we need to start over, we need to |
6472 | refetch the attributes from the skeleton CU. | |
6473 | This could be optimized by retrieving those attributes from when we | |
6474 | were here the first time: the previous comp_unit_die was stored in | |
6475 | comp_unit_obstack. But there's no data yet that we need this | |
6476 | optimization. */ | |
6477 | if (cu->dwo_unit != NULL) | |
6478 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6479 | } |
6480 | else | |
6481 | { | |
7188ed02 | 6482 | /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu |
dda83cd7 | 6483 | in per_objfile yet. */ |
976ca316 SM |
6484 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
6485 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); | |
c0ab21c2 | 6486 | cu = m_new_cu.get (); |
42e7ad6c | 6487 | } |
dee91e82 | 6488 | |
b0c7bfa9 | 6489 | /* Get the header. */ |
9c541725 | 6490 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6491 | { |
6492 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6493 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6494 | } |
6495 | else | |
6496 | { | |
3019eac3 | 6497 | if (this_cu->is_debug_types) |
dee91e82 | 6498 | { |
976ca316 SM |
6499 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6500 | section, abbrev_section, | |
6501 | info_ptr, rcuh_kind::TYPE); | |
dee91e82 | 6502 | |
42e7ad6c DE |
6503 | /* Since per_cu is the first member of struct signatured_type, |
6504 | we can go from a pointer to one to a pointer to the other. */ | |
6505 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6506 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6507 | gdb_assert (sig_type->type_offset_in_tu |
6508 | == cu->header.type_cu_offset_in_tu); | |
6509 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6510 | |
42e7ad6c DE |
6511 | /* LENGTH has not been set yet for type units if we're |
6512 | using .gdb_index. */ | |
4057dfde | 6513 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6514 | |
6515 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6516 | sig_type->type_offset_in_section = |
6517 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6518 | |
6519 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6520 | } |
6521 | else | |
6522 | { | |
976ca316 SM |
6523 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6524 | section, abbrev_section, | |
43988095 JK |
6525 | info_ptr, |
6526 | rcuh_kind::COMPILE); | |
dee91e82 | 6527 | |
9c541725 | 6528 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
3ee6bb11 TV |
6529 | if (this_cu->length == 0) |
6530 | this_cu->length = cu->header.get_length (); | |
6531 | else | |
6532 | gdb_assert (this_cu->length == cu->header.get_length ()); | |
43988095 | 6533 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6534 | } |
6535 | } | |
10b3939b | 6536 | |
6caca83c | 6537 | /* Skip dummy compilation units. */ |
dee91e82 | 6538 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6539 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6540 | { |
6541 | dummy_p = true; | |
6542 | return; | |
6543 | } | |
6caca83c | 6544 | |
433df2d4 DE |
6545 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6546 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6547 | done. */ |
f4dc4d17 | 6548 | if (abbrev_table != NULL) |
685af9cd TT |
6549 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6550 | else | |
f4dc4d17 | 6551 | { |
606decb2 | 6552 | abbrev_section->read (objfile); |
c0ab21c2 | 6553 | m_abbrev_table_holder |
606decb2 | 6554 | = abbrev_table::read (abbrev_section, cu->header.abbrev_sect_off); |
c0ab21c2 | 6555 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6556 | } |
af703f96 | 6557 | |
dee91e82 | 6558 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6559 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 6560 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 6561 | |
58f0c718 | 6562 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
6563 | { |
6564 | dummy_p = true; | |
6565 | return; | |
6566 | } | |
58f0c718 | 6567 | |
b0c7bfa9 | 6568 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
6569 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
6570 | table from the DWO file and pass the ownership over to us. It will be | |
6571 | referenced from READER, so we must make sure to free it after we're done | |
6572 | with READER. | |
6573 | ||
b0c7bfa9 DE |
6574 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
6575 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 6576 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 6577 | if (dwo_name != nullptr) |
3019eac3 | 6578 | { |
3019eac3 | 6579 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6580 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 6581 | |
3e225074 | 6582 | if (comp_unit_die->has_children) |
6a506a2d | 6583 | { |
b98664d3 | 6584 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
6585 | " has children (offset %s) [in module %s]"), |
6586 | sect_offset_str (this_cu->sect_off), | |
6587 | bfd_get_filename (abfd)); | |
6a506a2d | 6588 | } |
4ab09049 | 6589 | dwo_unit = lookup_dwo_unit (cu, comp_unit_die, dwo_name); |
6a506a2d | 6590 | if (dwo_unit != NULL) |
3019eac3 | 6591 | { |
4ab09049 | 6592 | if (read_cutu_die_from_dwo (cu, dwo_unit, |
a2ce51a0 | 6593 | comp_unit_die, NULL, |
c0ab21c2 | 6594 | this, &info_ptr, |
3e225074 | 6595 | &dwo_comp_unit_die, |
c0ab21c2 | 6596 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
6597 | { |
6598 | /* Dummy die. */ | |
c0ab21c2 | 6599 | dummy_p = true; |
6a506a2d DE |
6600 | return; |
6601 | } | |
6602 | comp_unit_die = dwo_comp_unit_die; | |
6603 | } | |
6604 | else | |
6605 | { | |
6606 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6607 | the stub. A complaint has already been logged. There's | |
6608 | not much more we can do except pass on the stub DIE to | |
6609 | die_reader_func. We don't want to throw an error on bad | |
6610 | debug info. */ | |
3019eac3 DE |
6611 | } |
6612 | } | |
c0ab21c2 | 6613 | } |
3019eac3 | 6614 | |
6751ebae TT |
6615 | void |
6616 | cutu_reader::keep () | |
c0ab21c2 | 6617 | { |
b0c7bfa9 | 6618 | /* Done, clean up. */ |
6751ebae TT |
6619 | gdb_assert (!dummy_p); |
6620 | if (m_new_cu != NULL) | |
348e048f | 6621 | { |
7188ed02 | 6622 | /* Save this dwarf2_cu in the per_objfile. The per_objfile owns it |
dda83cd7 | 6623 | now. */ |
7188ed02 SM |
6624 | dwarf2_per_objfile *per_objfile = m_new_cu->per_objfile; |
6625 | per_objfile->set_cu (m_this_cu, m_new_cu.release ()); | |
348e048f | 6626 | } |
dee91e82 DE |
6627 | } |
6628 | ||
18a8505e AT |
6629 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
6630 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
6631 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6632 | |
6633 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6634 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6635 | |
6636 | We fill in THIS_CU->length. | |
6637 | ||
dee91e82 | 6638 | THIS_CU->cu is always freed when done. |
3019eac3 | 6639 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
6640 | to care whether it refers to the "main" CU or the DWO CU. |
6641 | ||
6642 | When parent_cu is passed, it is used to provide a default value for | |
6643 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 6644 | |
ab432490 | 6645 | cutu_reader::cutu_reader (dwarf2_per_cu_data *this_cu, |
976ca316 | 6646 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 TT |
6647 | struct dwarf2_cu *parent_cu, |
6648 | struct dwo_file *dwo_file) | |
6649 | : die_reader_specs {}, | |
6650 | m_this_cu (this_cu) | |
dee91e82 | 6651 | { |
976ca316 | 6652 | struct objfile *objfile = per_objfile->objfile; |
8a0459fd | 6653 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6654 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 6655 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 6656 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6657 | |
b4f54984 | 6658 | if (dwarf_die_debug) |
9d8780f0 | 6659 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6660 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6661 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6662 | |
976ca316 | 6663 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
dee91e82 | 6664 | |
33e80786 DE |
6665 | abbrev_section = (dwo_file != NULL |
6666 | ? &dwo_file->sections.abbrev | |
6667 | : get_abbrev_section_for_cu (this_cu)); | |
6668 | ||
dee91e82 | 6669 | /* This is cheap if the section is already read in. */ |
96b79293 | 6670 | section->read (objfile); |
dee91e82 | 6671 | |
976ca316 | 6672 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); |
dee91e82 | 6673 | |
9c541725 | 6674 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
976ca316 SM |
6675 | info_ptr = read_and_check_comp_unit_head (per_objfile, &m_new_cu->header, |
6676 | section, abbrev_section, info_ptr, | |
43988095 JK |
6677 | (this_cu->is_debug_types |
6678 | ? rcuh_kind::TYPE | |
6679 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6680 | |
18a8505e AT |
6681 | if (parent_cu != nullptr) |
6682 | { | |
c0ab21c2 TT |
6683 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
6684 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 6685 | } |
4057dfde | 6686 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
6687 | |
6688 | /* Skip dummy compilation units. */ | |
6689 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6690 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
6691 | { |
6692 | dummy_p = true; | |
6693 | return; | |
6694 | } | |
72bf9492 | 6695 | |
606decb2 | 6696 | abbrev_section->read (objfile); |
c0ab21c2 | 6697 | m_abbrev_table_holder |
606decb2 | 6698 | = abbrev_table::read (abbrev_section, m_new_cu->header.abbrev_sect_off); |
dee91e82 | 6699 | |
c0ab21c2 TT |
6700 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
6701 | m_abbrev_table_holder.get ()); | |
3e225074 | 6702 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
6703 | } |
6704 | ||
0018ea6f DE |
6705 | \f |
6706 | /* Type Unit Groups. | |
dee91e82 | 6707 | |
0018ea6f DE |
6708 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6709 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6710 | so that all types coming from the same compilation (.o file) are grouped | |
6711 | together. A future step could be to put the types in the same symtab as | |
6712 | the CU the types ultimately came from. */ | |
ff013f42 | 6713 | |
f4dc4d17 DE |
6714 | static hashval_t |
6715 | hash_type_unit_group (const void *item) | |
6716 | { | |
9a3c8263 SM |
6717 | const struct type_unit_group *tu_group |
6718 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6719 | |
094b34ac | 6720 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6721 | } |
348e048f DE |
6722 | |
6723 | static int | |
f4dc4d17 | 6724 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6725 | { |
9a3c8263 SM |
6726 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6727 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6728 | |
094b34ac | 6729 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6730 | } |
348e048f | 6731 | |
f4dc4d17 DE |
6732 | /* Allocate a hash table for type unit groups. */ |
6733 | ||
eaa5fa8b | 6734 | static htab_up |
298e9637 | 6735 | allocate_type_unit_groups_table () |
f4dc4d17 | 6736 | { |
eaa5fa8b TT |
6737 | return htab_up (htab_create_alloc (3, |
6738 | hash_type_unit_group, | |
6739 | eq_type_unit_group, | |
ef5f598c | 6740 | htab_delete_entry<type_unit_group>, |
0d305d5c | 6741 | xcalloc, xfree)); |
f4dc4d17 | 6742 | } |
dee91e82 | 6743 | |
f4dc4d17 DE |
6744 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6745 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6746 | of any one psymtab grow too big. */ | |
6747 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6748 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6749 | |
094b34ac | 6750 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6751 | Create the type_unit_group object used to hold one or more TUs. */ |
6752 | ||
0d305d5c | 6753 | static std::unique_ptr<type_unit_group> |
094b34ac | 6754 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 6755 | { |
976ca316 SM |
6756 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6757 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
f4dc4d17 | 6758 | |
0d305d5c TT |
6759 | std::unique_ptr<type_unit_group> tu_group (new type_unit_group); |
6760 | tu_group->per_bfd = per_bfd; | |
f4dc4d17 | 6761 | |
1859c670 | 6762 | if (per_bfd->using_index) |
094b34ac | 6763 | { |
0d305d5c TT |
6764 | tu_group->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
6765 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6766 | } |
6767 | else | |
6768 | { | |
9c541725 | 6769 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 6770 | dwarf2_psymtab *pst; |
528e1572 | 6771 | std::string name; |
094b34ac DE |
6772 | |
6773 | /* Give the symtab a useful name for debug purposes. */ | |
6774 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
6775 | name = string_printf ("<type_units_%d>", |
6776 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 6777 | else |
528e1572 | 6778 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 6779 | |
0d305d5c TT |
6780 | pst = create_partial_symtab (tu_group.get (), per_objfile, |
6781 | name.c_str ()); | |
6d94535f | 6782 | pst->anonymous = true; |
094b34ac | 6783 | } |
f4dc4d17 | 6784 | |
094b34ac | 6785 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6786 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6787 | |
6788 | return tu_group; | |
6789 | } | |
6790 | ||
094b34ac DE |
6791 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6792 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6793 | |
6794 | static struct type_unit_group * | |
ff39bb5e | 6795 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 6796 | { |
976ca316 SM |
6797 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6798 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; | |
f4dc4d17 DE |
6799 | struct type_unit_group *tu_group; |
6800 | void **slot; | |
6801 | unsigned int line_offset; | |
6802 | struct type_unit_group type_unit_group_for_lookup; | |
6803 | ||
976ca316 SM |
6804 | if (per_objfile->per_bfd->type_unit_groups == NULL) |
6805 | per_objfile->per_bfd->type_unit_groups = allocate_type_unit_groups_table (); | |
f4dc4d17 DE |
6806 | |
6807 | /* Do we need to create a new group, or can we use an existing one? */ | |
6808 | ||
529908cb | 6809 | if (stmt_list != nullptr && stmt_list->form_is_unsigned ()) |
f4dc4d17 | 6810 | { |
529908cb | 6811 | line_offset = stmt_list->as_unsigned (); |
f4dc4d17 DE |
6812 | ++tu_stats->nr_symtab_sharers; |
6813 | } | |
6814 | else | |
6815 | { | |
6816 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6817 | We can do various things here like create one group per TU or | |
6818 | spread them over multiple groups to split up the expansion work. | |
6819 | To avoid worst case scenarios (too many groups or too large groups) | |
6820 | we, umm, group them in bunches. */ | |
6821 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6822 | | (tu_stats->nr_stmt_less_type_units | |
6823 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6824 | ++tu_stats->nr_stmt_less_type_units; | |
6825 | } | |
6826 | ||
094b34ac | 6827 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6828 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
976ca316 | 6829 | slot = htab_find_slot (per_objfile->per_bfd->type_unit_groups.get (), |
f4dc4d17 | 6830 | &type_unit_group_for_lookup, INSERT); |
0d305d5c | 6831 | if (*slot == nullptr) |
f4dc4d17 | 6832 | { |
9c541725 | 6833 | sect_offset line_offset_struct = (sect_offset) line_offset; |
0d305d5c TT |
6834 | std::unique_ptr<type_unit_group> grp |
6835 | = create_type_unit_group (cu, line_offset_struct); | |
6836 | *slot = grp.release (); | |
f4dc4d17 DE |
6837 | ++tu_stats->nr_symtabs; |
6838 | } | |
6839 | ||
0d305d5c TT |
6840 | tu_group = (struct type_unit_group *) *slot; |
6841 | gdb_assert (tu_group != nullptr); | |
f4dc4d17 DE |
6842 | return tu_group; |
6843 | } | |
0018ea6f DE |
6844 | \f |
6845 | /* Partial symbol tables. */ | |
6846 | ||
6847 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6848 | ||
6849 | The caller must fill in the following details: | |
6850 | dirname, textlow, texthigh. */ | |
6851 | ||
891813be | 6852 | static dwarf2_psymtab * |
7aa104c4 SM |
6853 | create_partial_symtab (dwarf2_per_cu_data *per_cu, |
6854 | dwarf2_per_objfile *per_objfile, | |
6855 | const char *name) | |
0018ea6f | 6856 | { |
0072c873 SM |
6857 | dwarf2_psymtab *pst |
6858 | = new dwarf2_psymtab (name, per_objfile->per_bfd->partial_symtabs.get (), | |
6859 | per_objfile->objfile->per_bfd, per_cu); | |
0018ea6f | 6860 | |
6d94535f | 6861 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
6862 | |
6863 | /* This is the glue that links PST into GDB's symbol API. */ | |
0018ea6f DE |
6864 | per_cu->v.psymtab = pst; |
6865 | ||
6866 | return pst; | |
6867 | } | |
6868 | ||
c0ab21c2 | 6869 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
6870 | |
6871 | static void | |
6872 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6873 | const gdb_byte *info_ptr, |
0018ea6f | 6874 | struct die_info *comp_unit_die, |
c0ab21c2 | 6875 | enum language pretend_language) |
0018ea6f DE |
6876 | { |
6877 | struct dwarf2_cu *cu = reader->cu; | |
7aa104c4 | 6878 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
84685904 | 6879 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
7aa104c4 | 6880 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 6881 | struct gdbarch *gdbarch = objfile->arch (); |
0018ea6f | 6882 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6883 | CORE_ADDR baseaddr; |
6884 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 6885 | dwarf2_psymtab *pst; |
3a2b436a | 6886 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6887 | const char *filename; |
0018ea6f | 6888 | |
0018ea6f DE |
6889 | gdb_assert (! per_cu->is_debug_types); |
6890 | ||
c0ab21c2 | 6891 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 6892 | |
0018ea6f | 6893 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
6894 | gdb::unique_xmalloc_ptr<char> debug_filename; |
6895 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
6896 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6897 | if (filename == NULL) | |
0018ea6f | 6898 | filename = ""; |
2e927613 TV |
6899 | else if (strcmp (filename, artificial) == 0) |
6900 | { | |
6901 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
6902 | sect_offset_str (per_cu->sect_off), |
6903 | (char *) NULL)); | |
2e927613 TV |
6904 | filename = debug_filename.get (); |
6905 | } | |
0018ea6f | 6906 | |
7aa104c4 | 6907 | pst = create_partial_symtab (per_cu, per_objfile, filename); |
0018ea6f DE |
6908 | |
6909 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6910 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 6911 | |
b3b3bada | 6912 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
6913 | |
6914 | dwarf2_find_base_address (comp_unit_die, cu); | |
6915 | ||
6916 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6917 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6918 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6919 | &best_highpc, cu, pst); | |
6920 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
6921 | { |
6922 | CORE_ADDR low | |
6923 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
6924 | - baseaddr); | |
6925 | CORE_ADDR high | |
6926 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
6927 | - baseaddr - 1); | |
6928 | /* Store the contiguous range if it is not empty; it can be | |
6929 | empty for CUs with no code. */ | |
84685904 | 6930 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
d320c2b5 | 6931 | low, high, pst); |
79748972 | 6932 | } |
0018ea6f DE |
6933 | |
6934 | /* Check if comp unit has_children. | |
6935 | If so, read the rest of the partial symbols from this comp unit. | |
6936 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 6937 | if (comp_unit_die->has_children) |
0018ea6f DE |
6938 | { |
6939 | struct partial_die_info *first_die; | |
6940 | CORE_ADDR lowpc, highpc; | |
6941 | ||
6942 | lowpc = ((CORE_ADDR) -1); | |
6943 | highpc = ((CORE_ADDR) 0); | |
6944 | ||
6945 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6946 | ||
6947 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6948 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6949 | |
6950 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6951 | complaints from `maint check'. */ | |
6952 | if (lowpc == ((CORE_ADDR) -1)) | |
6953 | lowpc = highpc; | |
6954 | ||
6955 | /* If the compilation unit didn't have an explicit address range, | |
6956 | then use the information extracted from its child dies. */ | |
e385593e | 6957 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6958 | { |
6959 | best_lowpc = lowpc; | |
6960 | best_highpc = highpc; | |
6961 | } | |
6962 | } | |
4ae976d1 | 6963 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
6964 | best_lowpc + baseaddr) |
6965 | - baseaddr); | |
4ae976d1 | 6966 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
6967 | best_highpc + baseaddr) |
6968 | - baseaddr); | |
0018ea6f | 6969 | |
ae7754b2 | 6970 | pst->end (); |
0018ea6f | 6971 | |
ae640021 | 6972 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
6973 | { |
6974 | int i; | |
ae640021 | 6975 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
6976 | |
6977 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6978 | post-pass. */ | |
6979 | pst->number_of_dependencies = len; | |
a9342b62 | 6980 | pst->dependencies |
84685904 | 6981 | = per_bfd->partial_symtabs->allocate_dependencies (len); |
ae640021 AB |
6982 | for (i = 0; i < len; ++i) |
6983 | { | |
6984 | pst->dependencies[i] | |
6985 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
6986 | } | |
0018ea6f | 6987 | |
ae640021 | 6988 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
6989 | } |
6990 | ||
6991 | /* Get the list of files included in the current compilation unit, | |
6992 | and build a psymtab for each of them. */ | |
6993 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6994 | ||
6f738b01 SM |
6995 | dwarf_read_debug_printf ("Psymtab for %s unit @%s: %s - %s" |
6996 | ", %d global, %d static syms", | |
6997 | per_cu->is_debug_types ? "type" : "comp", | |
6998 | sect_offset_str (per_cu->sect_off), | |
6999 | paddress (gdbarch, pst->text_low (objfile)), | |
7000 | paddress (gdbarch, pst->text_high (objfile)), | |
7001 | (int) pst->global_psymbols.size (), | |
7002 | (int) pst->static_psymbols.size ()); | |
0018ea6f DE |
7003 | } |
7004 | ||
7005 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7006 | Process compilation unit THIS_CU for a psymtab. */ | |
7007 | ||
7008 | static void | |
ab432490 SM |
7009 | process_psymtab_comp_unit (dwarf2_per_cu_data *this_cu, |
7010 | dwarf2_per_objfile *per_objfile, | |
135f5437 | 7011 | bool want_partial_unit, |
b93601f3 | 7012 | enum language pretend_language) |
0018ea6f DE |
7013 | { |
7014 | /* If this compilation unit was already read in, free the | |
7015 | cached copy in order to read it in again. This is | |
7016 | necessary because we skipped some symbols when we first | |
7017 | read in the compilation unit (see load_partial_dies). | |
7018 | This problem could be avoided, but the benefit is unclear. */ | |
7188ed02 | 7019 | per_objfile->remove_cu (this_cu); |
0018ea6f | 7020 | |
2e671100 | 7021 | cutu_reader reader (this_cu, per_objfile, nullptr, nullptr, false); |
c0ab21c2 | 7022 | |
58990295 TV |
7023 | switch (reader.comp_unit_die->tag) |
7024 | { | |
7025 | case DW_TAG_compile_unit: | |
7026 | this_cu->unit_type = DW_UT_compile; | |
7027 | break; | |
7028 | case DW_TAG_partial_unit: | |
7029 | this_cu->unit_type = DW_UT_partial; | |
7030 | break; | |
e77b0004 TV |
7031 | case DW_TAG_type_unit: |
7032 | this_cu->unit_type = DW_UT_type; | |
7033 | break; | |
58990295 | 7034 | default: |
702cf3f5 AB |
7035 | error (_("Dwarf Error: unexpected tag '%s' at offset %s [in module %s]"), |
7036 | dwarf_tag_name (reader.comp_unit_die->tag), | |
7037 | sect_offset_str (reader.cu->per_cu->sect_off), | |
7038 | objfile_name (per_objfile->objfile)); | |
58990295 TV |
7039 | } |
7040 | ||
c0ab21c2 | 7041 | if (reader.dummy_p) |
f1902523 | 7042 | { |
c0ab21c2 | 7043 | /* Nothing. */ |
f1902523 | 7044 | } |
c0ab21c2 | 7045 | else if (this_cu->is_debug_types) |
3e225074 TT |
7046 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7047 | reader.comp_unit_die); | |
135f5437 TT |
7048 | else if (want_partial_unit |
7049 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7050 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7051 | reader.comp_unit_die, | |
c0ab21c2 | 7052 | pretend_language); |
0018ea6f | 7053 | |
7188ed02 | 7054 | this_cu->lang = reader.cu->language; |
58990295 | 7055 | |
0018ea6f | 7056 | /* Age out any secondary CUs. */ |
7188ed02 | 7057 | per_objfile->age_comp_units (); |
0018ea6f | 7058 | } |
f4dc4d17 DE |
7059 | |
7060 | /* Reader function for build_type_psymtabs. */ | |
7061 | ||
7062 | static void | |
7063 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7064 | const gdb_byte *info_ptr, |
3e225074 | 7065 | struct die_info *type_unit_die) |
f4dc4d17 | 7066 | { |
976ca316 | 7067 | dwarf2_per_objfile *per_objfile = reader->cu->per_objfile; |
f4dc4d17 DE |
7068 | struct dwarf2_cu *cu = reader->cu; |
7069 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7070 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7071 | struct type_unit_group *tu_group; |
7072 | struct attribute *attr; | |
7073 | struct partial_die_info *first_die; | |
7074 | CORE_ADDR lowpc, highpc; | |
891813be | 7075 | dwarf2_psymtab *pst; |
f4dc4d17 | 7076 | |
0186c6a7 DE |
7077 | gdb_assert (per_cu->is_debug_types); |
7078 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7079 | |
3e225074 | 7080 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7081 | return; |
7082 | ||
052c8bb8 | 7083 | attr = type_unit_die->attr (DW_AT_stmt_list); |
094b34ac | 7084 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7085 | |
df07e2c7 | 7086 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7087 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7088 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7089 | |
7090 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
976ca316 | 7091 | pst = create_partial_symtab (per_cu, per_objfile, ""); |
6d94535f | 7092 | pst->anonymous = true; |
f4dc4d17 DE |
7093 | |
7094 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7095 | ||
7096 | lowpc = (CORE_ADDR) -1; | |
7097 | highpc = (CORE_ADDR) 0; | |
7098 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7099 | ||
ae7754b2 | 7100 | pst->end (); |
f4dc4d17 DE |
7101 | } |
7102 | ||
73051182 DE |
7103 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7104 | ||
7105 | struct tu_abbrev_offset | |
7106 | { | |
b2bdb8cf SM |
7107 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7108 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7109 | {} | |
7110 | ||
16e0020b | 7111 | /* This is used when sorting. */ |
5433e20e | 7112 | bool operator< (const tu_abbrev_offset &other) const |
16e0020b TT |
7113 | { |
7114 | return abbrev_offset < other.abbrev_offset; | |
7115 | } | |
7116 | ||
b2bdb8cf | 7117 | signatured_type *sig_type; |
73051182 DE |
7118 | sect_offset abbrev_offset; |
7119 | }; | |
7120 | ||
73051182 | 7121 | /* Efficiently read all the type units. |
73051182 DE |
7122 | |
7123 | The efficiency is because we sort TUs by the abbrev table they use and | |
7124 | only read each abbrev table once. In one program there are 200K TUs | |
7125 | sharing 8K abbrev tables. | |
7126 | ||
7127 | The main purpose of this function is to support building the | |
5989a64e | 7128 | dwarf2_per_objfile->per_bfd->type_unit_groups table. |
73051182 DE |
7129 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we |
7130 | can collapse the search space by grouping them by stmt_list. | |
7131 | The savings can be significant, in the same program from above the 200K TUs | |
7132 | share 8K stmt_list tables. | |
7133 | ||
7134 | FUNC is expected to call get_type_unit_group, which will create the | |
7135 | struct type_unit_group if necessary and add it to | |
5989a64e | 7136 | dwarf2_per_objfile->per_bfd->type_unit_groups. */ |
73051182 DE |
7137 | |
7138 | static void | |
b8efb248 | 7139 | build_type_psymtabs (dwarf2_per_objfile *per_objfile) |
73051182 | 7140 | { |
976ca316 | 7141 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; |
685af9cd | 7142 | abbrev_table_up abbrev_table; |
73051182 | 7143 | sect_offset abbrev_offset; |
73051182 DE |
7144 | |
7145 | /* It's up to the caller to not call us multiple times. */ | |
976ca316 | 7146 | gdb_assert (per_objfile->per_bfd->type_unit_groups == NULL); |
73051182 | 7147 | |
91eea9cc | 7148 | if (per_objfile->per_bfd->tu_stats.nr_tus == 0) |
73051182 DE |
7149 | return; |
7150 | ||
7151 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7152 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7153 | read each abbrev table in. | |
7154 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7155 | This is simpler and efficient enough for now. | |
7156 | ||
7157 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7158 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7159 | stmt_list value too so in practice this should work well. | |
7160 | ||
7161 | The basic algorithm here is: | |
7162 | ||
7163 | sort TUs by abbrev table | |
7164 | for each TU with same abbrev table: | |
7165 | read abbrev table if first user | |
7166 | read TU top level DIE | |
7167 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7168 | call FUNC */ | |
7169 | ||
6f738b01 | 7170 | dwarf_read_debug_printf ("Building type unit groups ..."); |
73051182 | 7171 | |
91eea9cc | 7172 | /* Sort in a separate table to maintain the order of all_comp_units |
73051182 | 7173 | for .gdb_index: TU indices directly index all_type_units. */ |
b2bdb8cf | 7174 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
91eea9cc | 7175 | sorted_by_abbrev.reserve (per_objfile->per_bfd->tu_stats.nr_tus); |
b2bdb8cf | 7176 | |
91eea9cc TT |
7177 | for (const auto &cu : per_objfile->per_bfd->all_comp_units) |
7178 | { | |
7179 | if (cu->is_debug_types) | |
7180 | { | |
7181 | auto sig_type = static_cast<signatured_type *> (cu.get ()); | |
7182 | sorted_by_abbrev.emplace_back | |
7183 | (sig_type, read_abbrev_offset (per_objfile, sig_type->section, | |
7184 | sig_type->sect_off)); | |
7185 | } | |
7186 | } | |
73051182 | 7187 | |
16e0020b | 7188 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end ()); |
73051182 | 7189 | |
9c541725 | 7190 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7191 | |
b2bdb8cf | 7192 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7193 | { |
73051182 DE |
7194 | /* Switch to the next abbrev table if necessary. */ |
7195 | if (abbrev_table == NULL | |
b2bdb8cf | 7196 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7197 | { |
b2bdb8cf | 7198 | abbrev_offset = tu.abbrev_offset; |
606decb2 | 7199 | per_objfile->per_bfd->abbrev.read (per_objfile->objfile); |
73051182 | 7200 | abbrev_table = |
606decb2 | 7201 | abbrev_table::read (&per_objfile->per_bfd->abbrev, abbrev_offset); |
73051182 DE |
7202 | ++tu_stats->nr_uniq_abbrev_tables; |
7203 | } | |
7204 | ||
0d305d5c | 7205 | cutu_reader reader (tu.sig_type, per_objfile, |
2e671100 | 7206 | abbrev_table.get (), nullptr, false); |
c0ab21c2 TT |
7207 | if (!reader.dummy_p) |
7208 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7209 | reader.comp_unit_die); |
73051182 | 7210 | } |
6aa5f3a6 | 7211 | } |
73051182 | 7212 | |
6aa5f3a6 DE |
7213 | /* Print collected type unit statistics. */ |
7214 | ||
7215 | static void | |
976ca316 | 7216 | print_tu_stats (dwarf2_per_objfile *per_objfile) |
6aa5f3a6 | 7217 | { |
976ca316 | 7218 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; |
6aa5f3a6 | 7219 | |
6f738b01 | 7220 | dwarf_read_debug_printf ("Type unit statistics:"); |
91eea9cc | 7221 | dwarf_read_debug_printf (" %d TUs", tu_stats->nr_tus); |
6f738b01 SM |
7222 | dwarf_read_debug_printf (" %d uniq abbrev tables", |
7223 | tu_stats->nr_uniq_abbrev_tables); | |
7224 | dwarf_read_debug_printf (" %d symtabs from stmt_list entries", | |
7225 | tu_stats->nr_symtabs); | |
7226 | dwarf_read_debug_printf (" %d symtab sharers", | |
7227 | tu_stats->nr_symtab_sharers); | |
7228 | dwarf_read_debug_printf (" %d type units without a stmt_list", | |
7229 | tu_stats->nr_stmt_less_type_units); | |
7230 | dwarf_read_debug_printf (" %d all_type_units reallocs", | |
7231 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7232 | } |
7233 | ||
f4dc4d17 DE |
7234 | /* Traversal function for build_type_psymtabs. */ |
7235 | ||
7236 | static int | |
7237 | build_type_psymtab_dependencies (void **slot, void *info) | |
7238 | { | |
976ca316 | 7239 | dwarf2_per_objfile *per_objfile = (dwarf2_per_objfile *) info; |
84685904 | 7240 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
f4dc4d17 | 7241 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; |
0d305d5c | 7242 | dwarf2_psymtab *pst = tu_group->v.psymtab; |
df07e2c7 | 7243 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7244 | int i; |
7245 | ||
7246 | gdb_assert (len > 0); | |
0d305d5c | 7247 | gdb_assert (tu_group->type_unit_group_p ()); |
f4dc4d17 DE |
7248 | |
7249 | pst->number_of_dependencies = len; | |
84685904 | 7250 | pst->dependencies = per_bfd->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7251 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7252 | { |
df07e2c7 | 7253 | struct signatured_type *iter = tu_group->tus->at (i); |
0d305d5c TT |
7254 | gdb_assert (iter->is_debug_types); |
7255 | pst->dependencies[i] = iter->v.psymtab; | |
796a7ff8 | 7256 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7257 | } |
7258 | ||
df07e2c7 AB |
7259 | delete tu_group->tus; |
7260 | tu_group->tus = nullptr; | |
348e048f DE |
7261 | |
7262 | return 1; | |
7263 | } | |
7264 | ||
6aa5f3a6 DE |
7265 | /* Traversal function for process_skeletonless_type_unit. |
7266 | Read a TU in a DWO file and build partial symbols for it. */ | |
7267 | ||
7268 | static int | |
7269 | process_skeletonless_type_unit (void **slot, void *info) | |
7270 | { | |
7271 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
976ca316 | 7272 | dwarf2_per_objfile *per_objfile = (dwarf2_per_objfile *) info; |
6aa5f3a6 DE |
7273 | struct signatured_type find_entry, *entry; |
7274 | ||
7275 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7276 | ||
976ca316 SM |
7277 | if (per_objfile->per_bfd->signatured_types == NULL) |
7278 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
6aa5f3a6 DE |
7279 | |
7280 | find_entry.signature = dwo_unit->signature; | |
976ca316 | 7281 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
b0b6a987 | 7282 | &find_entry, INSERT); |
6aa5f3a6 DE |
7283 | /* If we've already seen this type there's nothing to do. What's happening |
7284 | is we're doing our own version of comdat-folding here. */ | |
7285 | if (*slot != NULL) | |
7286 | return 1; | |
7287 | ||
b8efb248 | 7288 | /* This does the job that create_all_comp_units would have done for |
6aa5f3a6 | 7289 | this TU. */ |
976ca316 SM |
7290 | entry = add_type_unit (per_objfile, dwo_unit->signature, slot); |
7291 | fill_in_sig_entry_from_dwo_entry (per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7292 | *slot = entry; |
7293 | ||
b8efb248 | 7294 | /* This does the job that build_type_psymtabs would have done. */ |
0d305d5c | 7295 | cutu_reader reader (entry, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
7296 | if (!reader.dummy_p) |
7297 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7298 | reader.comp_unit_die); |
6aa5f3a6 DE |
7299 | |
7300 | return 1; | |
7301 | } | |
7302 | ||
7303 | /* Traversal function for process_skeletonless_type_units. */ | |
7304 | ||
7305 | static int | |
7306 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7307 | { | |
7308 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7309 | ||
7310 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7311 | htab_traverse_noresize (dwo_file->tus.get (), |
7312 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7313 | |
7314 | return 1; | |
7315 | } | |
7316 | ||
7317 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7318 | This is needed in case a TU was emitted without its skeleton. | |
7319 | Note: This can't be done until we know what all the DWO files are. */ | |
7320 | ||
7321 | static void | |
976ca316 | 7322 | process_skeletonless_type_units (dwarf2_per_objfile *per_objfile) |
6aa5f3a6 DE |
7323 | { |
7324 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
976ca316 SM |
7325 | if (get_dwp_file (per_objfile) == NULL |
7326 | && per_objfile->per_bfd->dwo_files != NULL) | |
6aa5f3a6 | 7327 | { |
976ca316 | 7328 | htab_traverse_noresize (per_objfile->per_bfd->dwo_files.get (), |
6aa5f3a6 | 7329 | process_dwo_file_for_skeletonless_type_units, |
976ca316 | 7330 | per_objfile); |
6aa5f3a6 | 7331 | } |
348e048f DE |
7332 | } |
7333 | ||
ed2dc618 | 7334 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7335 | |
7336 | static void | |
976ca316 | 7337 | set_partial_user (dwarf2_per_objfile *per_objfile) |
95554aad | 7338 | { |
0d305d5c | 7339 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
95554aad | 7340 | { |
891813be | 7341 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7342 | |
36586728 TT |
7343 | if (pst == NULL) |
7344 | continue; | |
7345 | ||
b76e467d | 7346 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7347 | { |
7348 | /* Set the 'user' field only if it is not already set. */ | |
7349 | if (pst->dependencies[j]->user == NULL) | |
7350 | pst->dependencies[j]->user = pst; | |
7351 | } | |
7352 | } | |
7353 | } | |
7354 | ||
93311388 DE |
7355 | /* Build the partial symbol table by doing a quick pass through the |
7356 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7357 | |
93311388 | 7358 | static void |
976ca316 | 7359 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile *per_objfile) |
93311388 | 7360 | { |
976ca316 | 7361 | struct objfile *objfile = per_objfile->objfile; |
84685904 | 7362 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
93311388 | 7363 | |
6f738b01 SM |
7364 | dwarf_read_debug_printf ("Building psymtabs of objfile %s ...", |
7365 | objfile_name (objfile)); | |
45cfd468 | 7366 | |
76935768 | 7367 | scoped_restore restore_reading_psyms |
bab287cd | 7368 | = make_scoped_restore (&per_bfd->reading_partial_symbols, true); |
98bfdba5 | 7369 | |
84685904 | 7370 | per_bfd->info.read (objfile); |
91c24f0a | 7371 | |
93311388 DE |
7372 | /* Any cached compilation units will be linked by the per-objfile |
7373 | read_in_chain. Make sure to free them when we're done. */ | |
976ca316 | 7374 | free_cached_comp_units freer (per_objfile); |
72bf9492 | 7375 | |
976ca316 | 7376 | create_all_comp_units (per_objfile); |
b8efb248 | 7377 | build_type_psymtabs (per_objfile); |
c906108c | 7378 | |
60606b2c TT |
7379 | /* Create a temporary address map on a temporary obstack. We later |
7380 | copy this to the final obstack. */ | |
8268c778 | 7381 | auto_obstack temp_obstack; |
791afaa2 TT |
7382 | |
7383 | scoped_restore save_psymtabs_addrmap | |
84685904 | 7384 | = make_scoped_restore (&per_bfd->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7385 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7386 | |
0d305d5c | 7387 | for (const auto &per_cu : per_bfd->all_comp_units) |
3d5afab3 TV |
7388 | { |
7389 | if (per_cu->v.psymtab != NULL) | |
7390 | /* In case a forward DW_TAG_imported_unit has read the CU already. */ | |
7391 | continue; | |
0d305d5c | 7392 | process_psymtab_comp_unit (per_cu.get (), per_objfile, false, |
ab432490 | 7393 | language_minimal); |
3d5afab3 | 7394 | } |
ff013f42 | 7395 | |
6aa5f3a6 | 7396 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
976ca316 | 7397 | process_skeletonless_type_units (per_objfile); |
6aa5f3a6 DE |
7398 | |
7399 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
84685904 | 7400 | if (per_bfd->type_unit_groups != NULL) |
6aa5f3a6 | 7401 | { |
84685904 | 7402 | htab_traverse_noresize (per_bfd->type_unit_groups.get (), |
976ca316 | 7403 | build_type_psymtab_dependencies, per_objfile); |
6aa5f3a6 DE |
7404 | } |
7405 | ||
6f738b01 | 7406 | if (dwarf_read_debug > 0) |
976ca316 | 7407 | print_tu_stats (per_objfile); |
6aa5f3a6 | 7408 | |
976ca316 | 7409 | set_partial_user (per_objfile); |
95554aad | 7410 | |
84685904 TT |
7411 | per_bfd->partial_symtabs->psymtabs_addrmap |
7412 | = addrmap_create_fixed (per_bfd->partial_symtabs->psymtabs_addrmap, | |
7413 | per_bfd->partial_symtabs->obstack ()); | |
791afaa2 TT |
7414 | /* At this point we want to keep the address map. */ |
7415 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7416 | |
6f738b01 SM |
7417 | dwarf_read_debug_printf ("Done building psymtabs of %s", |
7418 | objfile_name (objfile)); | |
ae038cb0 DJ |
7419 | } |
7420 | ||
dee91e82 DE |
7421 | /* Load the partial DIEs for a secondary CU into memory. |
7422 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7423 | |
dee91e82 | 7424 | static void |
ab432490 | 7425 | load_partial_comp_unit (dwarf2_per_cu_data *this_cu, |
2e671100 SM |
7426 | dwarf2_per_objfile *per_objfile, |
7427 | dwarf2_cu *existing_cu) | |
dee91e82 | 7428 | { |
2e671100 | 7429 | cutu_reader reader (this_cu, per_objfile, nullptr, existing_cu, false); |
c0ab21c2 TT |
7430 | |
7431 | if (!reader.dummy_p) | |
7432 | { | |
7433 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7434 | language_minimal); | |
7435 | ||
7436 | /* Check if comp unit has_children. | |
7437 | If so, read the rest of the partial symbols from this comp unit. | |
7438 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7439 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7440 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7441 | |
7442 | reader.keep (); | |
c0ab21c2 | 7443 | } |
ae038cb0 DJ |
7444 | } |
7445 | ||
ae038cb0 | 7446 | static void |
976ca316 | 7447 | read_comp_units_from_section (dwarf2_per_objfile *per_objfile, |
36586728 | 7448 | struct dwarf2_section_info *section, |
f1902523 | 7449 | struct dwarf2_section_info *abbrev_section, |
b8efb248 TT |
7450 | unsigned int is_dwz, |
7451 | htab_up &types_htab, | |
7452 | rcuh_kind section_kind) | |
ae038cb0 | 7453 | { |
d521ce57 | 7454 | const gdb_byte *info_ptr; |
976ca316 | 7455 | struct objfile *objfile = per_objfile->objfile; |
be391dca | 7456 | |
6f738b01 SM |
7457 | dwarf_read_debug_printf ("Reading %s for %s", |
7458 | section->get_name (), | |
7459 | section->get_file_name ()); | |
bf6af496 | 7460 | |
96b79293 | 7461 | section->read (objfile); |
ae038cb0 | 7462 | |
36586728 | 7463 | info_ptr = section->buffer; |
6e70227d | 7464 | |
36586728 | 7465 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7466 | { |
473ab964 | 7467 | dwarf2_per_cu_data_up this_cu; |
ae038cb0 | 7468 | |
9c541725 | 7469 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7470 | |
f1902523 | 7471 | comp_unit_head cu_header; |
976ca316 | 7472 | read_and_check_comp_unit_head (per_objfile, &cu_header, section, |
ed2dc618 | 7473 | abbrev_section, info_ptr, |
b8efb248 | 7474 | section_kind); |
ae038cb0 DJ |
7475 | |
7476 | /* Save the compilation unit for later lookup. */ | |
f1902523 | 7477 | if (cu_header.unit_type != DW_UT_type) |
976ca316 | 7478 | this_cu = per_objfile->per_bfd->allocate_per_cu (); |
f1902523 JK |
7479 | else |
7480 | { | |
b8efb248 TT |
7481 | if (types_htab == nullptr) |
7482 | types_htab = allocate_signatured_type_table (); | |
7483 | ||
976ca316 | 7484 | auto sig_type = per_objfile->per_bfd->allocate_signatured_type (); |
b8efb248 | 7485 | signatured_type *sig_ptr = sig_type.get (); |
f1902523 JK |
7486 | sig_type->signature = cu_header.signature; |
7487 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
473ab964 | 7488 | this_cu.reset (sig_type.release ()); |
b8efb248 TT |
7489 | |
7490 | void **slot = htab_find_slot (types_htab.get (), sig_ptr, INSERT); | |
7491 | gdb_assert (slot != nullptr); | |
7492 | if (*slot != nullptr) | |
7493 | complaint (_("debug type entry at offset %s is duplicate to" | |
7494 | " the entry at offset %s, signature %s"), | |
7495 | sect_offset_str (sect_off), | |
7496 | sect_offset_str (sig_ptr->sect_off), | |
7497 | hex_string (sig_ptr->signature)); | |
7498 | *slot = sig_ptr; | |
f1902523 JK |
7499 | } |
7500 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7501 | this_cu->sect_off = sect_off; |
f1902523 | 7502 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7503 | this_cu->is_dwz = is_dwz; |
8a0459fd | 7504 | this_cu->section = section; |
ae038cb0 | 7505 | |
ae038cb0 | 7506 | info_ptr = info_ptr + this_cu->length; |
0d305d5c | 7507 | per_objfile->per_bfd->all_comp_units.push_back (std::move (this_cu)); |
ae038cb0 | 7508 | } |
36586728 TT |
7509 | } |
7510 | ||
7511 | /* Create a list of all compilation units in OBJFILE. | |
7512 | This is only done for -readnow and building partial symtabs. */ | |
7513 | ||
7514 | static void | |
976ca316 | 7515 | create_all_comp_units (dwarf2_per_objfile *per_objfile) |
36586728 | 7516 | { |
b8efb248 TT |
7517 | htab_up types_htab; |
7518 | ||
976ca316 | 7519 | read_comp_units_from_section (per_objfile, &per_objfile->per_bfd->info, |
b8efb248 TT |
7520 | &per_objfile->per_bfd->abbrev, 0, |
7521 | types_htab, rcuh_kind::COMPILE); | |
7522 | for (dwarf2_section_info §ion : per_objfile->per_bfd->types) | |
7523 | read_comp_units_from_section (per_objfile, §ion, | |
7524 | &per_objfile->per_bfd->abbrev, 0, | |
7525 | types_htab, rcuh_kind::TYPE); | |
36586728 | 7526 | |
976ca316 | 7527 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd); |
4db1a1dc | 7528 | if (dwz != NULL) |
b8efb248 TT |
7529 | read_comp_units_from_section (per_objfile, &dwz->info, &dwz->abbrev, 1, |
7530 | types_htab, rcuh_kind::COMPILE); | |
7531 | ||
7532 | per_objfile->per_bfd->signatured_types = std::move (types_htab); | |
c906108c SS |
7533 | } |
7534 | ||
5734ee8b | 7535 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7536 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7537 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7538 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7539 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7540 | |
72bf9492 DJ |
7541 | static void |
7542 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7543 | CORE_ADDR *highpc, int set_addrmap, |
7544 | struct dwarf2_cu *cu) | |
c906108c | 7545 | { |
72bf9492 | 7546 | struct partial_die_info *pdi; |
c906108c | 7547 | |
91c24f0a DC |
7548 | /* Now, march along the PDI's, descending into ones which have |
7549 | interesting children but skipping the children of the other ones, | |
7550 | until we reach the end of the compilation unit. */ | |
c906108c | 7551 | |
72bf9492 | 7552 | pdi = first_die; |
91c24f0a | 7553 | |
72bf9492 DJ |
7554 | while (pdi != NULL) |
7555 | { | |
52356b79 | 7556 | pdi->fixup (cu); |
c906108c | 7557 | |
f55ee35c | 7558 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7559 | children, so we need to look at them. Ditto for anonymous |
7560 | enums. */ | |
933c6fe4 | 7561 | |
7d00ffec | 7562 | if (pdi->raw_name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 7563 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
7564 | || pdi->tag == DW_TAG_imported_unit |
7565 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 7566 | { |
72bf9492 | 7567 | switch (pdi->tag) |
c906108c SS |
7568 | { |
7569 | case DW_TAG_subprogram: | |
b1dc1806 | 7570 | case DW_TAG_inlined_subroutine: |
cdc07690 | 7571 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
f9b5d5ea TV |
7572 | if (cu->language == language_cplus) |
7573 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7574 | set_addrmap, cu); | |
c906108c | 7575 | break; |
72929c62 | 7576 | case DW_TAG_constant: |
c906108c SS |
7577 | case DW_TAG_variable: |
7578 | case DW_TAG_typedef: | |
91c24f0a | 7579 | case DW_TAG_union_type: |
317d2668 TV |
7580 | if (!pdi->is_declaration |
7581 | || (pdi->tag == DW_TAG_variable && pdi->is_external)) | |
63d06c5c | 7582 | { |
72bf9492 | 7583 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7584 | } |
7585 | break; | |
c906108c | 7586 | case DW_TAG_class_type: |
680b30c7 | 7587 | case DW_TAG_interface_type: |
c906108c | 7588 | case DW_TAG_structure_type: |
72bf9492 | 7589 | if (!pdi->is_declaration) |
c906108c | 7590 | { |
72bf9492 | 7591 | add_partial_symbol (pdi, cu); |
c906108c | 7592 | } |
b7fee5a3 KS |
7593 | if ((cu->language == language_rust |
7594 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
7595 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
7596 | set_addrmap, cu); | |
c906108c | 7597 | break; |
91c24f0a | 7598 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7599 | if (!pdi->is_declaration) |
7600 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7601 | break; |
7602 | case DW_TAG_base_type: | |
dda83cd7 | 7603 | case DW_TAG_subrange_type: |
c906108c | 7604 | /* File scope base type definitions are added to the partial |
dda83cd7 | 7605 | symbol table. */ |
72bf9492 | 7606 | add_partial_symbol (pdi, cu); |
c906108c | 7607 | break; |
d9fa45fe | 7608 | case DW_TAG_namespace: |
cdc07690 | 7609 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7610 | break; |
5d7cb8df | 7611 | case DW_TAG_module: |
59c35742 AB |
7612 | if (!pdi->is_declaration) |
7613 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 7614 | break; |
95554aad TT |
7615 | case DW_TAG_imported_unit: |
7616 | { | |
7617 | struct dwarf2_per_cu_data *per_cu; | |
7618 | ||
f4dc4d17 DE |
7619 | /* For now we don't handle imported units in type units. */ |
7620 | if (cu->per_cu->is_debug_types) | |
7621 | { | |
7622 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7623 | " supported in type units [in module %s]"), | |
5e22e966 | 7624 | objfile_name (cu->per_objfile->objfile)); |
f4dc4d17 DE |
7625 | } |
7626 | ||
e3b94546 | 7627 | per_cu = dwarf2_find_containing_comp_unit |
5e22e966 | 7628 | (pdi->d.sect_off, pdi->is_dwz, cu->per_objfile); |
95554aad TT |
7629 | |
7630 | /* Go read the partial unit, if needed. */ | |
7631 | if (per_cu->v.psymtab == NULL) | |
ab432490 SM |
7632 | process_psymtab_comp_unit (per_cu, cu->per_objfile, true, |
7633 | cu->language); | |
95554aad | 7634 | |
ae640021 | 7635 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
7636 | } |
7637 | break; | |
74921315 KS |
7638 | case DW_TAG_imported_declaration: |
7639 | add_partial_symbol (pdi, cu); | |
7640 | break; | |
c906108c SS |
7641 | default: |
7642 | break; | |
7643 | } | |
7644 | } | |
7645 | ||
72bf9492 DJ |
7646 | /* If the die has a sibling, skip to the sibling. */ |
7647 | ||
7648 | pdi = pdi->die_sibling; | |
7649 | } | |
7650 | } | |
7651 | ||
7652 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7653 | |
72bf9492 | 7654 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7655 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7656 | Enumerators are an exception; they use the scope of their parent |
7657 | enumeration type, i.e. the name of the enumeration type is not | |
7658 | prepended to the enumerator. | |
91c24f0a | 7659 | |
72bf9492 DJ |
7660 | There are two complexities. One is DW_AT_specification; in this |
7661 | case "parent" means the parent of the target of the specification, | |
7662 | instead of the direct parent of the DIE. The other is compilers | |
7663 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7664 | the fully qualified name of structure types from their members' | |
7665 | linkage names. This must be done using the DIE's children rather | |
7666 | than the children of any DW_AT_specification target. We only need | |
7667 | to do this for structures at the top level, i.e. if the target of | |
7668 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7669 | have a parent. */ | |
7670 | ||
7671 | /* Compute the scope prefix associated with PDI's parent, in | |
7672 | compilation unit CU. The result will be allocated on CU's | |
7673 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7674 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7675 | static const char * |
72bf9492 DJ |
7676 | partial_die_parent_scope (struct partial_die_info *pdi, |
7677 | struct dwarf2_cu *cu) | |
7678 | { | |
15d034d0 | 7679 | const char *grandparent_scope; |
72bf9492 | 7680 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7681 | |
72bf9492 DJ |
7682 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7683 | then this means the parent of the specification DIE. */ | |
7684 | ||
7685 | real_pdi = pdi; | |
72bf9492 | 7686 | while (real_pdi->has_specification) |
fb816e8b | 7687 | { |
122cf0f2 AB |
7688 | auto res = find_partial_die (real_pdi->spec_offset, |
7689 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
7690 | real_pdi = res.pdi; |
7691 | cu = res.cu; | |
7692 | } | |
72bf9492 DJ |
7693 | |
7694 | parent = real_pdi->die_parent; | |
7695 | if (parent == NULL) | |
7696 | return NULL; | |
7697 | ||
7698 | if (parent->scope_set) | |
7699 | return parent->scope; | |
7700 | ||
52356b79 | 7701 | parent->fixup (cu); |
72bf9492 | 7702 | |
10b3939b | 7703 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7704 | |
acebe513 UW |
7705 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7706 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7707 | Work around this problem here. */ | |
7708 | if (cu->language == language_cplus | |
6e70227d | 7709 | && parent->tag == DW_TAG_namespace |
7d00ffec | 7710 | && strcmp (parent->name (cu), "::") == 0 |
acebe513 UW |
7711 | && grandparent_scope == NULL) |
7712 | { | |
7713 | parent->scope = NULL; | |
7714 | parent->scope_set = 1; | |
7715 | return NULL; | |
7716 | } | |
7717 | ||
0a4b0913 | 7718 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
7719 | if (pdi->tag == DW_TAG_enumerator) |
7720 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7721 | parent->scope = grandparent_scope; | |
7722 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7723 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7724 | || parent->tag == DW_TAG_structure_type |
7725 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7726 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 7727 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
7728 | || parent->tag == DW_TAG_enumeration_type |
7729 | || (cu->language == language_fortran | |
7730 | && parent->tag == DW_TAG_subprogram | |
7731 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
7732 | { |
7733 | if (grandparent_scope == NULL) | |
7d00ffec | 7734 | parent->scope = parent->name (cu); |
72bf9492 | 7735 | else |
3e43a32a MS |
7736 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7737 | grandparent_scope, | |
7d00ffec | 7738 | parent->name (cu), 0, cu); |
72bf9492 | 7739 | } |
72bf9492 DJ |
7740 | else |
7741 | { | |
7742 | /* FIXME drow/2004-04-01: What should we be doing with | |
7743 | function-local names? For partial symbols, we should probably be | |
7744 | ignoring them. */ | |
fa9c3fa0 TT |
7745 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
7746 | dwarf_tag_name (parent->tag), | |
7747 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 7748 | parent->scope = grandparent_scope; |
c906108c SS |
7749 | } |
7750 | ||
72bf9492 DJ |
7751 | parent->scope_set = 1; |
7752 | return parent->scope; | |
7753 | } | |
7754 | ||
7755 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7756 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7757 | |
43816ebc | 7758 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
7759 | partial_die_full_name (struct partial_die_info *pdi, |
7760 | struct dwarf2_cu *cu) | |
7761 | { | |
15d034d0 | 7762 | const char *parent_scope; |
72bf9492 | 7763 | |
98bfdba5 PA |
7764 | /* If this is a template instantiation, we can not work out the |
7765 | template arguments from partial DIEs. So, unfortunately, we have | |
7766 | to go through the full DIEs. At least any work we do building | |
7767 | types here will be reused if full symbols are loaded later. */ | |
7768 | if (pdi->has_template_arguments) | |
7769 | { | |
52356b79 | 7770 | pdi->fixup (cu); |
98bfdba5 | 7771 | |
7d00ffec | 7772 | if (pdi->name (cu) != NULL && strchr (pdi->name (cu), '<') == NULL) |
98bfdba5 PA |
7773 | { |
7774 | struct die_info *die; | |
7775 | struct attribute attr; | |
7776 | struct dwarf2_cu *ref_cu = cu; | |
7777 | ||
b64f50a1 | 7778 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7779 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7780 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7781 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7782 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7783 | ||
43816ebc | 7784 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
7785 | } |
7786 | } | |
7787 | ||
72bf9492 DJ |
7788 | parent_scope = partial_die_parent_scope (pdi, cu); |
7789 | if (parent_scope == NULL) | |
7790 | return NULL; | |
7791 | else | |
43816ebc | 7792 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
7d00ffec TT |
7793 | pdi->name (cu), |
7794 | 0, cu)); | |
c906108c SS |
7795 | } |
7796 | ||
7797 | static void | |
72bf9492 | 7798 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7799 | { |
976ca316 SM |
7800 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
7801 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 7802 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 7803 | CORE_ADDR addr = 0; |
15d034d0 | 7804 | const char *actual_name = NULL; |
e142c38c DJ |
7805 | CORE_ADDR baseaddr; |
7806 | ||
b3b3bada | 7807 | baseaddr = objfile->text_section_offset (); |
c906108c | 7808 | |
43816ebc TT |
7809 | gdb::unique_xmalloc_ptr<char> built_actual_name |
7810 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 7811 | if (built_actual_name != NULL) |
43816ebc | 7812 | actual_name = built_actual_name.get (); |
63d06c5c | 7813 | |
72bf9492 | 7814 | if (actual_name == NULL) |
7d00ffec | 7815 | actual_name = pdi->name (cu); |
72bf9492 | 7816 | |
76e288d1 TT |
7817 | partial_symbol psymbol; |
7818 | memset (&psymbol, 0, sizeof (psymbol)); | |
7819 | psymbol.ginfo.set_language (cu->language, &objfile->objfile_obstack); | |
a52d653e | 7820 | psymbol.ginfo.set_section_index (-1); |
76e288d1 TT |
7821 | |
7822 | /* The code below indicates that the psymbol should be installed by | |
7823 | setting this. */ | |
7824 | gdb::optional<psymbol_placement> where; | |
7825 | ||
c906108c SS |
7826 | switch (pdi->tag) |
7827 | { | |
b1dc1806 | 7828 | case DW_TAG_inlined_subroutine: |
c906108c | 7829 | case DW_TAG_subprogram: |
79748972 TT |
7830 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
7831 | - baseaddr); | |
0a4b0913 AB |
7832 | if (pdi->is_external |
7833 | || cu->language == language_ada | |
7834 | || (cu->language == language_fortran | |
7835 | && pdi->die_parent != NULL | |
7836 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
7837 | { | |
dda83cd7 SM |
7838 | /* Normally, only "external" DIEs are part of the global scope. |
7839 | But in Ada and Fortran, we want to be able to access nested | |
7840 | procedures globally. So all Ada and Fortran subprograms are | |
7841 | stored in the global scope. */ | |
76e288d1 | 7842 | where = psymbol_placement::GLOBAL; |
c906108c SS |
7843 | } |
7844 | else | |
76e288d1 TT |
7845 | where = psymbol_placement::STATIC; |
7846 | ||
7847 | psymbol.domain = VAR_DOMAIN; | |
7848 | psymbol.aclass = LOC_BLOCK; | |
a52d653e | 7849 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 | 7850 | psymbol.ginfo.value.address = addr; |
0c1b455e TT |
7851 | |
7852 | if (pdi->main_subprogram && actual_name != NULL) | |
7853 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7854 | break; |
72929c62 | 7855 | case DW_TAG_constant: |
76e288d1 TT |
7856 | psymbol.domain = VAR_DOMAIN; |
7857 | psymbol.aclass = LOC_STATIC; | |
7858 | where = (pdi->is_external | |
7859 | ? psymbol_placement::GLOBAL | |
7860 | : psymbol_placement::STATIC); | |
72929c62 | 7861 | break; |
c906108c | 7862 | case DW_TAG_variable: |
95554aad TT |
7863 | if (pdi->d.locdesc) |
7864 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7865 | |
95554aad | 7866 | if (pdi->d.locdesc |
caac4577 | 7867 | && addr == 0 |
976ca316 | 7868 | && !per_objfile->per_bfd->has_section_at_zero) |
caac4577 JG |
7869 | { |
7870 | /* A global or static variable may also have been stripped | |
7871 | out by the linker if unused, in which case its address | |
7872 | will be nullified; do not add such variables into partial | |
7873 | symbol table then. */ | |
7874 | } | |
7875 | else if (pdi->is_external) | |
c906108c SS |
7876 | { |
7877 | /* Global Variable. | |
7878 | Don't enter into the minimal symbol tables as there is | |
7879 | a minimal symbol table entry from the ELF symbols already. | |
7880 | Enter into partial symbol table if it has a location | |
7881 | descriptor or a type. | |
7882 | If the location descriptor is missing, new_symbol will create | |
7883 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7884 | be determined from the minimal symbol table whenever the variable | |
7885 | is referenced. | |
7886 | The address for the partial symbol table entry is not | |
7887 | used by GDB, but it comes in handy for debugging partial symbol | |
7888 | table building. */ | |
7889 | ||
95554aad | 7890 | if (pdi->d.locdesc || pdi->has_type) |
76e288d1 TT |
7891 | { |
7892 | psymbol.domain = VAR_DOMAIN; | |
7893 | psymbol.aclass = LOC_STATIC; | |
a52d653e | 7894 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 TT |
7895 | psymbol.ginfo.value.address = addr; |
7896 | where = psymbol_placement::GLOBAL; | |
7897 | } | |
c906108c SS |
7898 | } |
7899 | else | |
7900 | { | |
ff908ebf AW |
7901 | int has_loc = pdi->d.locdesc != NULL; |
7902 | ||
7903 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7904 | without location descriptors or constant values). */ | |
7905 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 7906 | return; |
ff908ebf | 7907 | |
76e288d1 TT |
7908 | psymbol.domain = VAR_DOMAIN; |
7909 | psymbol.aclass = LOC_STATIC; | |
a52d653e | 7910 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 TT |
7911 | if (has_loc) |
7912 | psymbol.ginfo.value.address = addr; | |
7913 | where = psymbol_placement::STATIC; | |
c906108c SS |
7914 | } |
7915 | break; | |
d8f62e84 | 7916 | case DW_TAG_array_type: |
c906108c SS |
7917 | case DW_TAG_typedef: |
7918 | case DW_TAG_base_type: | |
a02abb62 | 7919 | case DW_TAG_subrange_type: |
76e288d1 TT |
7920 | psymbol.domain = VAR_DOMAIN; |
7921 | psymbol.aclass = LOC_TYPEDEF; | |
7922 | where = psymbol_placement::STATIC; | |
c906108c | 7923 | break; |
74921315 | 7924 | case DW_TAG_imported_declaration: |
72bf9492 | 7925 | case DW_TAG_namespace: |
76e288d1 TT |
7926 | psymbol.domain = VAR_DOMAIN; |
7927 | psymbol.aclass = LOC_TYPEDEF; | |
7928 | where = psymbol_placement::GLOBAL; | |
72bf9492 | 7929 | break; |
530e8392 | 7930 | case DW_TAG_module: |
a5fd13a9 | 7931 | /* With Fortran 77 there might be a "BLOCK DATA" module |
dda83cd7 SM |
7932 | available without any name. If so, we skip the module as it |
7933 | doesn't bring any value. */ | |
a5fd13a9 | 7934 | if (actual_name != nullptr) |
76e288d1 TT |
7935 | { |
7936 | psymbol.domain = MODULE_DOMAIN; | |
7937 | psymbol.aclass = LOC_TYPEDEF; | |
7938 | where = psymbol_placement::GLOBAL; | |
7939 | } | |
530e8392 | 7940 | break; |
c906108c | 7941 | case DW_TAG_class_type: |
680b30c7 | 7942 | case DW_TAG_interface_type: |
c906108c SS |
7943 | case DW_TAG_structure_type: |
7944 | case DW_TAG_union_type: | |
7945 | case DW_TAG_enumeration_type: | |
fa4028e9 | 7946 | /* Skip external references. The DWARF standard says in the section |
dda83cd7 SM |
7947 | about "Structure, Union, and Class Type Entries": "An incomplete |
7948 | structure, union or class type is represented by a structure, | |
7949 | union or class entry that does not have a byte size attribute | |
7950 | and that has a DW_AT_declaration attribute." */ | |
fa4028e9 | 7951 | if (!pdi->has_byte_size && pdi->is_declaration) |
43816ebc | 7952 | return; |
fa4028e9 | 7953 | |
63d06c5c DC |
7954 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7955 | static vs. global. */ | |
76e288d1 TT |
7956 | psymbol.domain = STRUCT_DOMAIN; |
7957 | psymbol.aclass = LOC_TYPEDEF; | |
7958 | where = (cu->language == language_cplus | |
7959 | ? psymbol_placement::GLOBAL | |
7960 | : psymbol_placement::STATIC); | |
c906108c SS |
7961 | break; |
7962 | case DW_TAG_enumerator: | |
76e288d1 TT |
7963 | psymbol.domain = VAR_DOMAIN; |
7964 | psymbol.aclass = LOC_CONST; | |
7965 | where = (cu->language == language_cplus | |
7966 | ? psymbol_placement::GLOBAL | |
7967 | : psymbol_placement::STATIC); | |
c906108c SS |
7968 | break; |
7969 | default: | |
7970 | break; | |
7971 | } | |
76e288d1 TT |
7972 | |
7973 | if (where.has_value ()) | |
7974 | { | |
f049a313 TT |
7975 | if (built_actual_name != nullptr) |
7976 | actual_name = objfile->intern (actual_name); | |
bcfe6157 TT |
7977 | if (pdi->linkage_name == nullptr || cu->language == language_ada) |
7978 | psymbol.ginfo.set_linkage_name (actual_name); | |
7979 | else | |
7980 | { | |
7981 | psymbol.ginfo.set_demangled_name (actual_name, | |
7982 | &objfile->objfile_obstack); | |
7983 | psymbol.ginfo.set_linkage_name (pdi->linkage_name); | |
7984 | } | |
7b249e47 TT |
7985 | cu->per_cu->v.psymtab->add_psymbol |
7986 | (psymbol, *where, per_objfile->per_bfd->partial_symtabs.get (), | |
7987 | objfile); | |
76e288d1 | 7988 | } |
c906108c SS |
7989 | } |
7990 | ||
5c4e30ca DC |
7991 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7992 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7993 | the name of the enclosing namespace. */ | |
91c24f0a | 7994 | |
72bf9492 DJ |
7995 | static void |
7996 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7997 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7998 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7999 | { |
72bf9492 | 8000 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8001 | |
72bf9492 | 8002 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8003 | |
8004 | /* Now scan partial symbols in that namespace. */ | |
8005 | ||
91c24f0a | 8006 | if (pdi->has_children) |
cdc07690 | 8007 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8008 | } |
8009 | ||
5d7cb8df JK |
8010 | /* Read a partial die corresponding to a Fortran module. */ |
8011 | ||
8012 | static void | |
8013 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8014 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8015 | { |
530e8392 KB |
8016 | /* Add a symbol for the namespace. */ |
8017 | ||
8018 | add_partial_symbol (pdi, cu); | |
8019 | ||
f55ee35c | 8020 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8021 | |
8022 | if (pdi->has_children) | |
cdc07690 | 8023 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8024 | } |
8025 | ||
b1dc1806 XR |
8026 | /* Read a partial die corresponding to a subprogram or an inlined |
8027 | subprogram and create a partial symbol for that subprogram. | |
8028 | When the CU language allows it, this routine also defines a partial | |
8029 | symbol for each nested subprogram that this subprogram contains. | |
8030 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8031 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8032 | |
cdc07690 YQ |
8033 | PDI may also be a lexical block, in which case we simply search |
8034 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8035 | Again, this is only performed when the CU language allows this |
8036 | type of definitions. */ | |
8037 | ||
8038 | static void | |
8039 | add_partial_subprogram (struct partial_die_info *pdi, | |
8040 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8041 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8042 | { |
b1dc1806 | 8043 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8044 | { |
8045 | if (pdi->has_pc_info) | |
dda83cd7 SM |
8046 | { |
8047 | if (pdi->lowpc < *lowpc) | |
8048 | *lowpc = pdi->lowpc; | |
8049 | if (pdi->highpc > *highpc) | |
8050 | *highpc = pdi->highpc; | |
cdc07690 | 8051 | if (set_addrmap) |
5734ee8b | 8052 | { |
5e22e966 | 8053 | struct objfile *objfile = cu->per_objfile->objfile; |
84685904 | 8054 | dwarf2_per_bfd *per_bfd = cu->per_objfile->per_bfd; |
08feed99 | 8055 | struct gdbarch *gdbarch = objfile->arch (); |
3e29f34a | 8056 | CORE_ADDR baseaddr; |
b926417a TT |
8057 | CORE_ADDR this_highpc; |
8058 | CORE_ADDR this_lowpc; | |
5734ee8b | 8059 | |
b3b3bada | 8060 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8061 | this_lowpc |
8062 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8063 | pdi->lowpc + baseaddr) | |
8064 | - baseaddr); | |
8065 | this_highpc | |
8066 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8067 | pdi->highpc + baseaddr) | |
8068 | - baseaddr); | |
84685904 | 8069 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
b926417a | 8070 | this_lowpc, this_highpc - 1, |
9291a0cd | 8071 | cu->per_cu->v.psymtab); |
5734ee8b | 8072 | } |
dda83cd7 | 8073 | } |
481860b3 GB |
8074 | |
8075 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8076 | { | |
dda83cd7 | 8077 | if (!pdi->is_declaration) |
e8d05480 JB |
8078 | /* Ignore subprogram DIEs that do not have a name, they are |
8079 | illegal. Do not emit a complaint at this point, we will | |
8080 | do so when we convert this psymtab into a symtab. */ | |
7d00ffec | 8081 | if (pdi->name (cu)) |
e8d05480 | 8082 | add_partial_symbol (pdi, cu); |
dda83cd7 | 8083 | } |
bc30ff58 | 8084 | } |
6e70227d | 8085 | |
bc30ff58 JB |
8086 | if (! pdi->has_children) |
8087 | return; | |
8088 | ||
0a4b0913 | 8089 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8090 | { |
8091 | pdi = pdi->die_child; | |
8092 | while (pdi != NULL) | |
8093 | { | |
52356b79 | 8094 | pdi->fixup (cu); |
bc30ff58 | 8095 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8096 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8097 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8098 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8099 | pdi = pdi->die_sibling; |
8100 | } | |
8101 | } | |
8102 | } | |
8103 | ||
91c24f0a DC |
8104 | /* Read a partial die corresponding to an enumeration type. */ |
8105 | ||
72bf9492 DJ |
8106 | static void |
8107 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8108 | struct dwarf2_cu *cu) | |
91c24f0a | 8109 | { |
72bf9492 | 8110 | struct partial_die_info *pdi; |
91c24f0a | 8111 | |
7d00ffec | 8112 | if (enum_pdi->name (cu) != NULL) |
72bf9492 DJ |
8113 | add_partial_symbol (enum_pdi, cu); |
8114 | ||
8115 | pdi = enum_pdi->die_child; | |
8116 | while (pdi) | |
91c24f0a | 8117 | { |
7d00ffec | 8118 | if (pdi->tag != DW_TAG_enumerator || pdi->raw_name == NULL) |
b98664d3 | 8119 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8120 | else |
72bf9492 DJ |
8121 | add_partial_symbol (pdi, cu); |
8122 | pdi = pdi->die_sibling; | |
91c24f0a | 8123 | } |
91c24f0a DC |
8124 | } |
8125 | ||
6caca83c CC |
8126 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8127 | ||
8128 | static unsigned int | |
d521ce57 | 8129 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8130 | { |
8131 | unsigned int bytes_read; | |
8132 | ||
8133 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8134 | } | |
8135 | ||
685af9cd TT |
8136 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8137 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8138 | ||
4bb7a0a7 DJ |
8139 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8140 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8141 | the initial number. */ | |
8142 | ||
7c32eebb | 8143 | static const struct abbrev_info * |
685af9cd TT |
8144 | peek_die_abbrev (const die_reader_specs &reader, |
8145 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8146 | { |
685af9cd | 8147 | dwarf2_cu *cu = reader.cu; |
0280fdcc | 8148 | bfd *abfd = reader.abfd; |
685af9cd TT |
8149 | unsigned int abbrev_number |
8150 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8151 | |
8152 | if (abbrev_number == 0) | |
8153 | return NULL; | |
8154 | ||
7c32eebb TT |
8155 | const abbrev_info *abbrev |
8156 | = reader.abbrev_table->lookup_abbrev (abbrev_number); | |
4bb7a0a7 DJ |
8157 | if (!abbrev) |
8158 | { | |
422b9917 | 8159 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8160 | " at offset %s [in module %s]"), |
422b9917 | 8161 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8162 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8163 | } |
8164 | ||
8165 | return abbrev; | |
8166 | } | |
8167 | ||
93311388 DE |
8168 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8169 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8170 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8171 | ||
d521ce57 TT |
8172 | static const gdb_byte * |
8173 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8174 | { |
4bb7a0a7 DJ |
8175 | while (1) |
8176 | { | |
685af9cd | 8177 | unsigned int bytes_read; |
7c32eebb TT |
8178 | const abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, |
8179 | &bytes_read); | |
685af9cd | 8180 | |
4bb7a0a7 DJ |
8181 | if (abbrev == NULL) |
8182 | return info_ptr + bytes_read; | |
8183 | else | |
dee91e82 | 8184 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8185 | } |
8186 | } | |
8187 | ||
93311388 DE |
8188 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8189 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8190 | abbrev corresponding to that skipped uleb128 should be passed in |
8191 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8192 | children. */ | |
8193 | ||
d521ce57 TT |
8194 | static const gdb_byte * |
8195 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
7c32eebb | 8196 | const struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8197 | { |
8198 | unsigned int bytes_read; | |
8199 | struct attribute attr; | |
dee91e82 DE |
8200 | bfd *abfd = reader->abfd; |
8201 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8202 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8203 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8204 | unsigned int form, i; |
8205 | ||
8206 | for (i = 0; i < abbrev->num_attrs; i++) | |
8207 | { | |
8208 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8209 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8210 | { | |
7a5f294d | 8211 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8212 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8213 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8214 | else |
b9502d3f | 8215 | { |
0826b30a | 8216 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 8217 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
8218 | |
8219 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8220 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 8221 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 8222 | reader->die_section->overflow_complaint (); |
b9502d3f WN |
8223 | else |
8224 | return sibling_ptr; | |
8225 | } | |
4bb7a0a7 DJ |
8226 | } |
8227 | ||
8228 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8229 | form = abbrev->attrs[i].form; | |
8230 | skip_attribute: | |
8231 | switch (form) | |
8232 | { | |
4bb7a0a7 | 8233 | case DW_FORM_ref_addr: |
ae411497 TT |
8234 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8235 | and later it is offset sized. */ | |
8236 | if (cu->header.version == 2) | |
8237 | info_ptr += cu->header.addr_size; | |
8238 | else | |
8239 | info_ptr += cu->header.offset_size; | |
8240 | break; | |
36586728 TT |
8241 | case DW_FORM_GNU_ref_alt: |
8242 | info_ptr += cu->header.offset_size; | |
8243 | break; | |
ae411497 | 8244 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8245 | info_ptr += cu->header.addr_size; |
8246 | break; | |
8247 | case DW_FORM_data1: | |
8248 | case DW_FORM_ref1: | |
8249 | case DW_FORM_flag: | |
8fe0f950 | 8250 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8251 | info_ptr += 1; |
8252 | break; | |
2dc7f7b3 | 8253 | case DW_FORM_flag_present: |
43988095 | 8254 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8255 | break; |
4bb7a0a7 DJ |
8256 | case DW_FORM_data2: |
8257 | case DW_FORM_ref2: | |
8fe0f950 | 8258 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8259 | info_ptr += 2; |
8260 | break; | |
8fe0f950 AT |
8261 | case DW_FORM_strx3: |
8262 | info_ptr += 3; | |
8263 | break; | |
4bb7a0a7 DJ |
8264 | case DW_FORM_data4: |
8265 | case DW_FORM_ref4: | |
8fe0f950 | 8266 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8267 | info_ptr += 4; |
8268 | break; | |
8269 | case DW_FORM_data8: | |
8270 | case DW_FORM_ref8: | |
55f1336d | 8271 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8272 | info_ptr += 8; |
8273 | break; | |
0224619f JK |
8274 | case DW_FORM_data16: |
8275 | info_ptr += 16; | |
8276 | break; | |
4bb7a0a7 | 8277 | case DW_FORM_string: |
9b1c24c8 | 8278 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8279 | info_ptr += bytes_read; |
8280 | break; | |
2dc7f7b3 | 8281 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8282 | case DW_FORM_strp: |
36586728 | 8283 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8284 | info_ptr += cu->header.offset_size; |
8285 | break; | |
2dc7f7b3 | 8286 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8287 | case DW_FORM_block: |
8288 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8289 | info_ptr += bytes_read; | |
8290 | break; | |
8291 | case DW_FORM_block1: | |
8292 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8293 | break; | |
8294 | case DW_FORM_block2: | |
8295 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8296 | break; | |
8297 | case DW_FORM_block4: | |
8298 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8299 | break; | |
336d760d | 8300 | case DW_FORM_addrx: |
cf532bd1 | 8301 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8302 | case DW_FORM_sdata: |
8303 | case DW_FORM_udata: | |
8304 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8305 | case DW_FORM_GNU_addr_index: |
8306 | case DW_FORM_GNU_str_index: | |
18a8505e | 8307 | case DW_FORM_rnglistx: |
41144253 | 8308 | case DW_FORM_loclistx: |
d521ce57 | 8309 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8310 | break; |
8311 | case DW_FORM_indirect: | |
8312 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8313 | info_ptr += bytes_read; | |
8314 | /* We need to continue parsing from here, so just go back to | |
8315 | the top. */ | |
8316 | goto skip_attribute; | |
8317 | ||
8318 | default: | |
3e43a32a MS |
8319 | error (_("Dwarf Error: Cannot handle %s " |
8320 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8321 | dwarf_form_name (form), |
8322 | bfd_get_filename (abfd)); | |
8323 | } | |
8324 | } | |
8325 | ||
8326 | if (abbrev->has_children) | |
dee91e82 | 8327 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8328 | else |
8329 | return info_ptr; | |
8330 | } | |
8331 | ||
93311388 | 8332 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8333 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8334 | |
d521ce57 | 8335 | static const gdb_byte * |
dee91e82 DE |
8336 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8337 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8338 | const gdb_byte *info_ptr) |
91c24f0a DC |
8339 | { |
8340 | /* Do we know the sibling already? */ | |
72bf9492 | 8341 | |
91c24f0a DC |
8342 | if (orig_pdi->sibling) |
8343 | return orig_pdi->sibling; | |
8344 | ||
8345 | /* Are there any children to deal with? */ | |
8346 | ||
8347 | if (!orig_pdi->has_children) | |
8348 | return info_ptr; | |
8349 | ||
4bb7a0a7 | 8350 | /* Skip the children the long way. */ |
91c24f0a | 8351 | |
dee91e82 | 8352 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8353 | } |
8354 | ||
257e7a09 | 8355 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8356 | not NULL. */ |
c906108c | 8357 | |
891813be TT |
8358 | void |
8359 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8360 | { |
976ca316 | 8361 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 8362 | |
976ca316 | 8363 | gdb_assert (!per_objfile->symtab_set_p (per_cu_data)); |
af758d11 | 8364 | |
077cbab2 TT |
8365 | /* If this psymtab is constructed from a debug-only objfile, the |
8366 | has_section_at_zero flag will not necessarily be correct. We | |
8367 | can get the correct value for this flag by looking at the data | |
8368 | associated with the (presumably stripped) associated objfile. */ | |
8369 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8370 | { |
976ca316 | 8371 | dwarf2_per_objfile *per_objfile_backlink |
077cbab2 | 8372 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
c906108c | 8373 | |
976ca316 SM |
8374 | per_objfile->per_bfd->has_section_at_zero |
8375 | = per_objfile_backlink->per_bfd->has_section_at_zero; | |
077cbab2 | 8376 | } |
98bfdba5 | 8377 | |
8566b89b | 8378 | expand_psymtab (objfile); |
95554aad | 8379 | |
976ca316 | 8380 | process_cu_includes (per_objfile); |
c906108c | 8381 | } |
9cdd5dbd DE |
8382 | \f |
8383 | /* Reading in full CUs. */ | |
c906108c | 8384 | |
10b3939b DJ |
8385 | /* Add PER_CU to the queue. */ |
8386 | ||
8387 | static void | |
120ce1b5 SM |
8388 | queue_comp_unit (dwarf2_per_cu_data *per_cu, |
8389 | dwarf2_per_objfile *per_objfile, | |
95554aad | 8390 | enum language pretend_language) |
10b3939b | 8391 | { |
10b3939b | 8392 | per_cu->queued = 1; |
08ac5771 SM |
8393 | |
8394 | gdb_assert (per_objfile->per_bfd->queue.has_value ()); | |
8395 | per_cu->per_bfd->queue->emplace (per_cu, per_objfile, pretend_language); | |
10b3939b DJ |
8396 | } |
8397 | ||
616c069a SM |
8398 | /* If PER_CU is not yet expanded of queued for expansion, add it to the queue. |
8399 | ||
89e63ee4 DE |
8400 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a |
8401 | dependency. | |
69d751e3 | 8402 | |
616c069a SM |
8403 | Return true if maybe_queue_comp_unit requires the caller to load the CU's |
8404 | DIEs, false otherwise. | |
8405 | ||
8406 | Explanation: there is an invariant that if a CU is queued for expansion | |
8407 | (present in `dwarf2_per_bfd::queue`), then its DIEs are loaded | |
8408 | (a dwarf2_cu object exists for this CU, and `dwarf2_per_objfile::get_cu` | |
8409 | returns non-nullptr). If the CU gets enqueued by this function but its DIEs | |
8410 | are not yet loaded, the the caller must load the CU's DIEs to ensure the | |
8411 | invariant is respected. | |
8412 | ||
8413 | The caller is therefore not required to load the CU's DIEs (we return false) | |
8414 | if: | |
8415 | ||
8416 | - the CU is already expanded, and therefore does not get enqueued | |
8417 | - the CU gets enqueued for expansion, but its DIEs are already loaded | |
8418 | ||
8419 | Note that the caller should not use this function's return value as an | |
8420 | indicator of whether the CU's DIEs are loaded right now, it should check | |
8421 | that by calling `dwarf2_per_objfile::get_cu` instead. */ | |
0907af0c DE |
8422 | |
8423 | static int | |
89e63ee4 | 8424 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
120ce1b5 SM |
8425 | dwarf2_per_cu_data *per_cu, |
8426 | dwarf2_per_objfile *per_objfile, | |
0907af0c DE |
8427 | enum language pretend_language) |
8428 | { | |
8429 | /* We may arrive here during partial symbol reading, if we need full | |
8430 | DIEs to process an unusual case (e.g. template arguments). Do | |
8431 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
1859c670 | 8432 | if (per_cu->per_bfd->reading_partial_symbols) |
0907af0c | 8433 | { |
7188ed02 SM |
8434 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
8435 | ||
8436 | if (cu == NULL || cu->dies == NULL) | |
0907af0c DE |
8437 | return 1; |
8438 | return 0; | |
8439 | } | |
8440 | ||
8441 | /* Mark the dependence relation so that we don't flush PER_CU | |
8442 | too early. */ | |
89e63ee4 | 8443 | if (dependent_cu != NULL) |
347212b8 | 8444 | dependent_cu->add_dependence (per_cu); |
0907af0c DE |
8445 | |
8446 | /* If it's already on the queue, we have nothing to do. */ | |
8447 | if (per_cu->queued) | |
de53369b SM |
8448 | { |
8449 | /* Verify the invariant that if a CU is queued for expansion, its DIEs are | |
8450 | loaded. */ | |
8451 | gdb_assert (per_objfile->get_cu (per_cu) != nullptr); | |
616c069a SM |
8452 | |
8453 | /* If the CU is queued for expansion, it should not already be | |
8454 | expanded. */ | |
8455 | gdb_assert (!per_objfile->symtab_set_p (per_cu)); | |
8456 | ||
8457 | /* The DIEs are already loaded, the caller doesn't need to do it. */ | |
de53369b SM |
8458 | return 0; |
8459 | } | |
0907af0c | 8460 | |
616c069a SM |
8461 | bool queued = false; |
8462 | if (!per_objfile->symtab_set_p (per_cu)) | |
8463 | { | |
8464 | /* Add it to the queue. */ | |
8465 | queue_comp_unit (per_cu, per_objfile, pretend_language); | |
8466 | queued = true; | |
8467 | } | |
8468 | ||
0907af0c DE |
8469 | /* If the compilation unit is already loaded, just mark it as |
8470 | used. */ | |
7188ed02 SM |
8471 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
8472 | if (cu != nullptr) | |
616c069a | 8473 | cu->last_used = 0; |
0907af0c | 8474 | |
616c069a SM |
8475 | /* Ask the caller to load the CU's DIEs if the CU got enqueued for expansion |
8476 | and the DIEs are not already loaded. */ | |
8477 | return queued && cu == nullptr; | |
0907af0c DE |
8478 | } |
8479 | ||
10b3939b DJ |
8480 | /* Process the queue. */ |
8481 | ||
8482 | static void | |
976ca316 | 8483 | process_queue (dwarf2_per_objfile *per_objfile) |
10b3939b | 8484 | { |
6f738b01 SM |
8485 | dwarf_read_debug_printf ("Expanding one or more symtabs of objfile %s ...", |
8486 | objfile_name (per_objfile->objfile)); | |
45cfd468 | 8487 | |
03dd20cc DJ |
8488 | /* The queue starts out with one item, but following a DIE reference |
8489 | may load a new CU, adding it to the end of the queue. */ | |
08ac5771 | 8490 | while (!per_objfile->per_bfd->queue->empty ()) |
10b3939b | 8491 | { |
08ac5771 | 8492 | dwarf2_queue_item &item = per_objfile->per_bfd->queue->front (); |
7188ed02 | 8493 | dwarf2_per_cu_data *per_cu = item.per_cu; |
39856def | 8494 | |
976ca316 | 8495 | if (!per_objfile->symtab_set_p (per_cu)) |
f4dc4d17 | 8496 | { |
976ca316 | 8497 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
f4dc4d17 | 8498 | |
7188ed02 SM |
8499 | /* Skip dummy CUs. */ |
8500 | if (cu != nullptr) | |
73be47f5 | 8501 | { |
7188ed02 SM |
8502 | unsigned int debug_print_threshold; |
8503 | char buf[100]; | |
8504 | ||
8505 | if (per_cu->is_debug_types) | |
8506 | { | |
8507 | struct signatured_type *sig_type = | |
8508 | (struct signatured_type *) per_cu; | |
8509 | ||
8510 | sprintf (buf, "TU %s at offset %s", | |
8511 | hex_string (sig_type->signature), | |
8512 | sect_offset_str (per_cu->sect_off)); | |
8513 | /* There can be 100s of TUs. | |
8514 | Only print them in verbose mode. */ | |
8515 | debug_print_threshold = 2; | |
8516 | } | |
8517 | else | |
8518 | { | |
8519 | sprintf (buf, "CU at offset %s", | |
8520 | sect_offset_str (per_cu->sect_off)); | |
8521 | debug_print_threshold = 1; | |
8522 | } | |
247f5c4f | 8523 | |
7188ed02 | 8524 | if (dwarf_read_debug >= debug_print_threshold) |
6f738b01 | 8525 | dwarf_read_debug_printf ("Expanding symtab of %s", buf); |
f4dc4d17 | 8526 | |
7188ed02 SM |
8527 | if (per_cu->is_debug_types) |
8528 | process_full_type_unit (cu, item.pretend_language); | |
8529 | else | |
8530 | process_full_comp_unit (cu, item.pretend_language); | |
f4dc4d17 | 8531 | |
7188ed02 | 8532 | if (dwarf_read_debug >= debug_print_threshold) |
6f738b01 | 8533 | dwarf_read_debug_printf ("Done expanding %s", buf); |
7188ed02 | 8534 | } |
f4dc4d17 | 8535 | } |
10b3939b | 8536 | |
7188ed02 | 8537 | per_cu->queued = 0; |
08ac5771 | 8538 | per_objfile->per_bfd->queue->pop (); |
10b3939b DJ |
8539 | } |
8540 | ||
6f738b01 SM |
8541 | dwarf_read_debug_printf ("Done expanding symtabs of %s.", |
8542 | objfile_name (per_objfile->objfile)); | |
10b3939b DJ |
8543 | } |
8544 | ||
10b3939b DJ |
8545 | /* Read in full symbols for PST, and anything it depends on. */ |
8546 | ||
8566b89b TT |
8547 | void |
8548 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8549 | { |
af758d11 | 8550 | gdb_assert (!readin_p (objfile)); |
95554aad | 8551 | |
17ee85fc TT |
8552 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
8553 | free_cached_comp_units freer (per_objfile); | |
48993951 | 8554 | expand_dependencies (objfile); |
aaa75496 | 8555 | |
97a1449a | 8556 | dw2_do_instantiate_symtab (per_cu_data, per_objfile, false); |
5717c425 | 8557 | gdb_assert (get_compunit_symtab (objfile) != nullptr); |
10b3939b DJ |
8558 | } |
8559 | ||
af758d11 SM |
8560 | /* See psympriv.h. */ |
8561 | ||
8562 | bool | |
8563 | dwarf2_psymtab::readin_p (struct objfile *objfile) const | |
8564 | { | |
8565 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); | |
8566 | return per_objfile->symtab_set_p (per_cu_data); | |
8567 | } | |
8568 | ||
8569 | /* See psympriv.h. */ | |
8570 | ||
8571 | compunit_symtab * | |
8572 | dwarf2_psymtab::get_compunit_symtab (struct objfile *objfile) const | |
8573 | { | |
8574 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); | |
8575 | return per_objfile->get_symtab (per_cu_data); | |
8576 | } | |
8577 | ||
dee91e82 DE |
8578 | /* Trivial hash function for die_info: the hash value of a DIE |
8579 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8580 | |
dee91e82 DE |
8581 | static hashval_t |
8582 | die_hash (const void *item) | |
10b3939b | 8583 | { |
9a3c8263 | 8584 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8585 | |
9c541725 | 8586 | return to_underlying (die->sect_off); |
dee91e82 | 8587 | } |
63d06c5c | 8588 | |
dee91e82 DE |
8589 | /* Trivial comparison function for die_info structures: two DIEs |
8590 | are equal if they have the same offset. */ | |
98bfdba5 | 8591 | |
dee91e82 DE |
8592 | static int |
8593 | die_eq (const void *item_lhs, const void *item_rhs) | |
8594 | { | |
9a3c8263 SM |
8595 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8596 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8597 | |
9c541725 | 8598 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8599 | } |
c906108c | 8600 | |
4a636814 SM |
8601 | /* Load the DIEs associated with PER_CU into memory. |
8602 | ||
8603 | In some cases, the caller, while reading partial symbols, will need to load | |
8604 | the full symbols for the CU for some reason. It will already have a | |
8605 | dwarf2_cu object for THIS_CU and pass it as EXISTING_CU, so it can be re-used | |
8606 | rather than creating a new one. */ | |
c906108c | 8607 | |
dee91e82 | 8608 | static void |
ab432490 SM |
8609 | load_full_comp_unit (dwarf2_per_cu_data *this_cu, |
8610 | dwarf2_per_objfile *per_objfile, | |
4a636814 | 8611 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
8612 | bool skip_partial, |
8613 | enum language pretend_language) | |
dee91e82 | 8614 | { |
c0ab21c2 TT |
8615 | gdb_assert (! this_cu->is_debug_types); |
8616 | ||
7188ed02 | 8617 | cutu_reader reader (this_cu, per_objfile, NULL, existing_cu, skip_partial); |
c0ab21c2 TT |
8618 | if (reader.dummy_p) |
8619 | return; | |
8620 | ||
8621 | struct dwarf2_cu *cu = reader.cu; | |
8622 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 8623 | |
dee91e82 DE |
8624 | gdb_assert (cu->die_hash == NULL); |
8625 | cu->die_hash = | |
8626 | htab_create_alloc_ex (cu->header.length / 12, | |
8627 | die_hash, | |
8628 | die_eq, | |
8629 | NULL, | |
8630 | &cu->comp_unit_obstack, | |
8631 | hashtab_obstack_allocate, | |
8632 | dummy_obstack_deallocate); | |
e142c38c | 8633 | |
3e225074 | 8634 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
8635 | reader.comp_unit_die->child |
8636 | = read_die_and_siblings (&reader, reader.info_ptr, | |
8637 | &info_ptr, reader.comp_unit_die); | |
8638 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 8639 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
8640 | |
8641 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8642 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8643 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8644 | or we won't be able to build types correctly. |
8645 | Similarly, if we do not read the producer, we can not apply | |
8646 | producer-specific interpretation. */ | |
c0ab21c2 | 8647 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
8648 | |
8649 | reader.keep (); | |
10b3939b DJ |
8650 | } |
8651 | ||
3da10d80 KS |
8652 | /* Add a DIE to the delayed physname list. */ |
8653 | ||
8654 | static void | |
8655 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8656 | const char *name, struct die_info *die, | |
8657 | struct dwarf2_cu *cu) | |
8658 | { | |
8659 | struct delayed_method_info mi; | |
8660 | mi.type = type; | |
8661 | mi.fnfield_index = fnfield_index; | |
8662 | mi.index = index; | |
8663 | mi.name = name; | |
8664 | mi.die = die; | |
c89b44cd | 8665 | cu->method_list.push_back (mi); |
3da10d80 KS |
8666 | } |
8667 | ||
3693fdb3 PA |
8668 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8669 | "const" / "volatile". If so, decrements LEN by the length of the | |
8670 | modifier and return true. Otherwise return false. */ | |
8671 | ||
8672 | template<size_t N> | |
8673 | static bool | |
8674 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8675 | { | |
8676 | size_t mod_len = sizeof (mod) - 1; | |
8677 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8678 | { | |
8679 | len -= mod_len; | |
8680 | return true; | |
8681 | } | |
8682 | return false; | |
8683 | } | |
8684 | ||
3da10d80 KS |
8685 | /* Compute the physnames of any methods on the CU's method list. |
8686 | ||
8687 | The computation of method physnames is delayed in order to avoid the | |
8688 | (bad) condition that one of the method's formal parameters is of an as yet | |
8689 | incomplete type. */ | |
8690 | ||
8691 | static void | |
8692 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8693 | { | |
3693fdb3 | 8694 | /* Only C++ delays computing physnames. */ |
c89b44cd | 8695 | if (cu->method_list.empty ()) |
3693fdb3 PA |
8696 | return; |
8697 | gdb_assert (cu->language == language_cplus); | |
8698 | ||
52941706 | 8699 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 8700 | { |
1d06ead6 | 8701 | const char *physname; |
3da10d80 | 8702 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
8703 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
8704 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
8705 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 8706 | = physname ? physname : ""; |
3693fdb3 PA |
8707 | |
8708 | /* Since there's no tag to indicate whether a method is a | |
8709 | const/volatile overload, extract that information out of the | |
8710 | demangled name. */ | |
8711 | if (physname != NULL) | |
8712 | { | |
8713 | size_t len = strlen (physname); | |
8714 | ||
8715 | while (1) | |
8716 | { | |
8717 | if (physname[len] == ')') /* shortcut */ | |
8718 | break; | |
8719 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 8720 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 8721 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 8722 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
8723 | else |
8724 | break; | |
8725 | } | |
8726 | } | |
3da10d80 | 8727 | } |
c89b44cd TT |
8728 | |
8729 | /* The list is no longer needed. */ | |
8730 | cu->method_list.clear (); | |
3da10d80 KS |
8731 | } |
8732 | ||
a766d390 DE |
8733 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8734 | and it's not clear if/how imported objects will appear. | |
8735 | To keep Go support simple until that's worked out, | |
8736 | go back through what we've read and create something usable. | |
8737 | We could do this while processing each DIE, and feels kinda cleaner, | |
8738 | but that way is more invasive. | |
8739 | This is to, for example, allow the user to type "p var" or "b main" | |
8740 | without having to specify the package name, and allow lookups | |
8741 | of module.object to work in contexts that use the expression | |
8742 | parser. */ | |
8743 | ||
8744 | static void | |
8745 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8746 | { | |
421d1616 | 8747 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
8748 | struct pending *list; |
8749 | int i; | |
8750 | ||
c24bdb02 | 8751 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
8752 | list != NULL; |
8753 | list = list->next) | |
a766d390 DE |
8754 | { |
8755 | for (i = 0; i < list->nsyms; ++i) | |
8756 | { | |
8757 | struct symbol *sym = list->symbol[i]; | |
8758 | ||
c1b5c1eb | 8759 | if (sym->language () == language_go |
a766d390 DE |
8760 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
8761 | { | |
421d1616 TT |
8762 | gdb::unique_xmalloc_ptr<char> this_package_name |
8763 | (go_symbol_package_name (sym)); | |
a766d390 DE |
8764 | |
8765 | if (this_package_name == NULL) | |
8766 | continue; | |
8767 | if (package_name == NULL) | |
421d1616 | 8768 | package_name = std::move (this_package_name); |
a766d390 DE |
8769 | else |
8770 | { | |
5e22e966 | 8771 | struct objfile *objfile = cu->per_objfile->objfile; |
421d1616 | 8772 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 8773 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
8774 | (symbol_symtab (sym) != NULL |
8775 | ? symtab_to_filename_for_display | |
8776 | (symbol_symtab (sym)) | |
e3b94546 | 8777 | : objfile_name (objfile)), |
421d1616 | 8778 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
8779 | } |
8780 | } | |
8781 | } | |
8782 | } | |
8783 | ||
8784 | if (package_name != NULL) | |
8785 | { | |
5e22e966 | 8786 | struct objfile *objfile = cu->per_objfile->objfile; |
be1e3d3e | 8787 | const char *saved_package_name = objfile->intern (package_name.get ()); |
19f392bc UW |
8788 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8789 | saved_package_name); | |
a766d390 DE |
8790 | struct symbol *sym; |
8791 | ||
8c14c3a3 | 8792 | sym = new (&objfile->objfile_obstack) symbol; |
d3ecddab | 8793 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 8794 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
8795 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8796 | e.g., "main" finds the "main" module and not C's main(). */ | |
8797 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8798 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8799 | SYMBOL_TYPE (sym) = type; |
8800 | ||
c24bdb02 | 8801 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
8802 | } |
8803 | } | |
8804 | ||
c9317f21 TT |
8805 | /* Allocate a fully-qualified name consisting of the two parts on the |
8806 | obstack. */ | |
8807 | ||
8808 | static const char * | |
8809 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
8810 | { | |
8811 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
8812 | } | |
8813 | ||
9c6a1327 TT |
8814 | /* A helper that allocates a variant part to attach to a Rust enum |
8815 | type. OBSTACK is where the results should be allocated. TYPE is | |
8816 | the type we're processing. DISCRIMINANT_INDEX is the index of the | |
57d02173 TT |
8817 | discriminant. It must be the index of one of the fields of TYPE, |
8818 | or -1 to mean there is no discriminant (univariant enum). | |
9c6a1327 TT |
8819 | DEFAULT_INDEX is the index of the default field; or -1 if there is |
8820 | no default. RANGES is indexed by "effective" field number (the | |
8821 | field index, but omitting the discriminant and default fields) and | |
8822 | must hold the discriminant values used by the variants. Note that | |
8823 | RANGES must have a lifetime at least as long as OBSTACK -- either | |
8824 | already allocated on it, or static. */ | |
c9317f21 | 8825 | |
9c6a1327 TT |
8826 | static void |
8827 | alloc_rust_variant (struct obstack *obstack, struct type *type, | |
8828 | int discriminant_index, int default_index, | |
8829 | gdb::array_view<discriminant_range> ranges) | |
8830 | { | |
57d02173 TT |
8831 | /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. */ |
8832 | gdb_assert (discriminant_index == -1 | |
8833 | || (discriminant_index >= 0 | |
8834 | && discriminant_index < type->num_fields ())); | |
c9317f21 | 8835 | gdb_assert (default_index == -1 |
1f704f76 | 8836 | || (default_index >= 0 && default_index < type->num_fields ())); |
c9317f21 | 8837 | |
9c6a1327 | 8838 | /* We have one variant for each non-discriminant field. */ |
57d02173 TT |
8839 | int n_variants = type->num_fields (); |
8840 | if (discriminant_index != -1) | |
8841 | --n_variants; | |
c9317f21 | 8842 | |
9c6a1327 TT |
8843 | variant *variants = new (obstack) variant[n_variants]; |
8844 | int var_idx = 0; | |
8845 | int range_idx = 0; | |
1f704f76 | 8846 | for (int i = 0; i < type->num_fields (); ++i) |
9c6a1327 TT |
8847 | { |
8848 | if (i == discriminant_index) | |
8849 | continue; | |
c9317f21 | 8850 | |
9c6a1327 TT |
8851 | variants[var_idx].first_field = i; |
8852 | variants[var_idx].last_field = i + 1; | |
8853 | ||
8854 | /* The default field does not need a range, but other fields do. | |
8855 | We skipped the discriminant above. */ | |
8856 | if (i != default_index) | |
8857 | { | |
8858 | variants[var_idx].discriminants = ranges.slice (range_idx, 1); | |
8859 | ++range_idx; | |
8860 | } | |
c9317f21 | 8861 | |
9c6a1327 TT |
8862 | ++var_idx; |
8863 | } | |
8864 | ||
8865 | gdb_assert (range_idx == ranges.size ()); | |
8866 | gdb_assert (var_idx == n_variants); | |
8867 | ||
8868 | variant_part *part = new (obstack) variant_part; | |
8869 | part->discriminant_index = discriminant_index; | |
57d02173 TT |
8870 | /* If there is no discriminant, then whether it is signed is of no |
8871 | consequence. */ | |
8872 | part->is_unsigned | |
8873 | = (discriminant_index == -1 | |
8874 | ? false | |
c6d940a9 | 8875 | : type->field (discriminant_index).type ()->is_unsigned ()); |
9c6a1327 TT |
8876 | part->variants = gdb::array_view<variant> (variants, n_variants); |
8877 | ||
8878 | void *storage = obstack_alloc (obstack, sizeof (gdb::array_view<variant_part>)); | |
8879 | gdb::array_view<variant_part> *prop_value | |
8880 | = new (storage) gdb::array_view<variant_part> (part, 1); | |
c9317f21 | 8881 | |
9c6a1327 | 8882 | struct dynamic_prop prop; |
8c2e4e06 | 8883 | prop.set_variant_parts (prop_value); |
9c6a1327 | 8884 | |
5c54719c | 8885 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
c9317f21 TT |
8886 | } |
8887 | ||
8888 | /* Some versions of rustc emitted enums in an unusual way. | |
8889 | ||
8890 | Ordinary enums were emitted as unions. The first element of each | |
8891 | structure in the union was named "RUST$ENUM$DISR". This element | |
8892 | held the discriminant. | |
8893 | ||
8894 | These versions of Rust also implemented the "non-zero" | |
8895 | optimization. When the enum had two values, and one is empty and | |
8896 | the other holds a pointer that cannot be zero, the pointer is used | |
8897 | as the discriminant, with a zero value meaning the empty variant. | |
8898 | Here, the union's first member is of the form | |
8899 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
8900 | where the fieldnos are the indices of the fields that should be | |
8901 | traversed in order to find the field (which may be several fields deep) | |
8902 | and the variantname is the name of the variant of the case when the | |
8903 | field is zero. | |
8904 | ||
8905 | This function recognizes whether TYPE is of one of these forms, | |
8906 | and, if so, smashes it to be a variant type. */ | |
8907 | ||
8908 | static void | |
8909 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
8910 | { | |
78134374 | 8911 | gdb_assert (type->code () == TYPE_CODE_UNION); |
c9317f21 TT |
8912 | |
8913 | /* We don't need to deal with empty enums. */ | |
1f704f76 | 8914 | if (type->num_fields () == 0) |
c9317f21 TT |
8915 | return; |
8916 | ||
8917 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
1f704f76 | 8918 | if (type->num_fields () == 1 |
c9317f21 TT |
8919 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) |
8920 | { | |
8921 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
8922 | ||
8923 | /* Decode the field name to find the offset of the | |
8924 | discriminant. */ | |
8925 | ULONGEST bit_offset = 0; | |
940da03e | 8926 | struct type *field_type = type->field (0).type (); |
c9317f21 TT |
8927 | while (name[0] >= '0' && name[0] <= '9') |
8928 | { | |
8929 | char *tail; | |
8930 | unsigned long index = strtoul (name, &tail, 10); | |
8931 | name = tail; | |
8932 | if (*name != '$' | |
1f704f76 | 8933 | || index >= field_type->num_fields () |
c9317f21 TT |
8934 | || (TYPE_FIELD_LOC_KIND (field_type, index) |
8935 | != FIELD_LOC_KIND_BITPOS)) | |
8936 | { | |
b98664d3 | 8937 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
8938 | "[in module %s]"), |
8939 | TYPE_FIELD_NAME (type, 0), | |
8940 | objfile_name (objfile)); | |
8941 | return; | |
8942 | } | |
8943 | ++name; | |
8944 | ||
8945 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
940da03e | 8946 | field_type = field_type->field (index).type (); |
c9317f21 TT |
8947 | } |
8948 | ||
9c6a1327 TT |
8949 | /* Smash this type to be a structure type. We have to do this |
8950 | because the type has already been recorded. */ | |
67607e24 | 8951 | type->set_code (TYPE_CODE_STRUCT); |
5e33d5f4 | 8952 | type->set_num_fields (3); |
9c6a1327 | 8953 | /* Save the field we care about. */ |
ceacbf6e | 8954 | struct field saved_field = type->field (0); |
3cabb6b0 SM |
8955 | type->set_fields |
8956 | ((struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field))); | |
c9317f21 | 8957 | |
9c6a1327 | 8958 | /* Put the discriminant at index 0. */ |
5d14b6e5 | 8959 | type->field (0).set_type (field_type); |
9c6a1327 TT |
8960 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
8961 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
ceacbf6e | 8962 | SET_FIELD_BITPOS (type->field (0), bit_offset); |
c9317f21 TT |
8963 | |
8964 | /* The order of fields doesn't really matter, so put the real | |
8965 | field at index 1 and the data-less field at index 2. */ | |
ceacbf6e | 8966 | type->field (1) = saved_field; |
9c6a1327 | 8967 | TYPE_FIELD_NAME (type, 1) |
940da03e SM |
8968 | = rust_last_path_segment (type->field (1).type ()->name ()); |
8969 | type->field (1).type ()->set_name | |
7d93a1e0 | 8970 | (rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
d0e39ea2 | 8971 | TYPE_FIELD_NAME (type, 1))); |
c9317f21 TT |
8972 | |
8973 | const char *dataless_name | |
7d93a1e0 | 8974 | = rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
c9317f21 TT |
8975 | name); |
8976 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
8977 | dataless_name); | |
5d14b6e5 | 8978 | type->field (2).set_type (dataless_type); |
c9317f21 TT |
8979 | /* NAME points into the original discriminant name, which |
8980 | already has the correct lifetime. */ | |
9c6a1327 | 8981 | TYPE_FIELD_NAME (type, 2) = name; |
ceacbf6e | 8982 | SET_FIELD_BITPOS (type->field (2), 0); |
c9317f21 | 8983 | |
9c6a1327 TT |
8984 | /* Indicate that this is a variant type. */ |
8985 | static discriminant_range ranges[1] = { { 0, 0 } }; | |
8986 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, ranges); | |
c9317f21 | 8987 | } |
77c2dba3 TT |
8988 | /* A union with a single anonymous field is probably an old-style |
8989 | univariant enum. */ | |
1f704f76 | 8990 | else if (type->num_fields () == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) |
c9317f21 | 8991 | { |
c9317f21 TT |
8992 | /* Smash this type to be a structure type. We have to do this |
8993 | because the type has already been recorded. */ | |
67607e24 | 8994 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 8995 | |
940da03e | 8996 | struct type *field_type = type->field (0).type (); |
c9317f21 | 8997 | const char *variant_name |
7d93a1e0 | 8998 | = rust_last_path_segment (field_type->name ()); |
9c6a1327 | 8999 | TYPE_FIELD_NAME (type, 0) = variant_name; |
d0e39ea2 SM |
9000 | field_type->set_name |
9001 | (rust_fully_qualify (&objfile->objfile_obstack, | |
7d93a1e0 | 9002 | type->name (), variant_name)); |
57d02173 TT |
9003 | |
9004 | alloc_rust_variant (&objfile->objfile_obstack, type, -1, 0, {}); | |
c9317f21 TT |
9005 | } |
9006 | else | |
9007 | { | |
9008 | struct type *disr_type = nullptr; | |
1f704f76 | 9009 | for (int i = 0; i < type->num_fields (); ++i) |
c9317f21 | 9010 | { |
940da03e | 9011 | disr_type = type->field (i).type (); |
c9317f21 | 9012 | |
78134374 | 9013 | if (disr_type->code () != TYPE_CODE_STRUCT) |
a037790e TT |
9014 | { |
9015 | /* All fields of a true enum will be structs. */ | |
9016 | return; | |
9017 | } | |
1f704f76 | 9018 | else if (disr_type->num_fields () == 0) |
c9317f21 TT |
9019 | { |
9020 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9021 | disr_type = nullptr; |
c9317f21 TT |
9022 | } |
9023 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9024 | "RUST$ENUM$DISR") != 0) | |
9025 | { | |
9026 | /* Not a Rust enum. */ | |
9027 | return; | |
9028 | } | |
9029 | else | |
9030 | { | |
9031 | /* Found one. */ | |
9032 | break; | |
9033 | } | |
9034 | } | |
9035 | ||
9036 | /* If we got here without a discriminant, then it's probably | |
9037 | just a union. */ | |
9038 | if (disr_type == nullptr) | |
9039 | return; | |
9040 | ||
9041 | /* Smash this type to be a structure type. We have to do this | |
9042 | because the type has already been recorded. */ | |
67607e24 | 9043 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 9044 | |
9c6a1327 | 9045 | /* Make space for the discriminant field. */ |
ceacbf6e | 9046 | struct field *disr_field = &disr_type->field (0); |
9c6a1327 | 9047 | field *new_fields |
1f704f76 | 9048 | = (struct field *) TYPE_ZALLOC (type, ((type->num_fields () + 1) |
9c6a1327 | 9049 | * sizeof (struct field))); |
80fc5e77 | 9050 | memcpy (new_fields + 1, type->fields (), |
1f704f76 | 9051 | type->num_fields () * sizeof (struct field)); |
3cabb6b0 | 9052 | type->set_fields (new_fields); |
1f704f76 | 9053 | type->set_num_fields (type->num_fields () + 1); |
c9317f21 TT |
9054 | |
9055 | /* Install the discriminant at index 0 in the union. */ | |
ceacbf6e | 9056 | type->field (0) = *disr_field; |
9c6a1327 TT |
9057 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
9058 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
c9317f21 TT |
9059 | |
9060 | /* We need a way to find the correct discriminant given a | |
9061 | variant name. For convenience we build a map here. */ | |
b6cdac4b | 9062 | struct type *enum_type = disr_field->type (); |
c9317f21 | 9063 | std::unordered_map<std::string, ULONGEST> discriminant_map; |
1f704f76 | 9064 | for (int i = 0; i < enum_type->num_fields (); ++i) |
c9317f21 TT |
9065 | { |
9066 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9067 | { | |
9068 | const char *name | |
9069 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9070 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9071 | } | |
9072 | } | |
9073 | ||
1f704f76 | 9074 | int n_fields = type->num_fields (); |
9c6a1327 TT |
9075 | /* We don't need a range entry for the discriminant, but we do |
9076 | need one for every other field, as there is no default | |
9077 | variant. */ | |
9078 | discriminant_range *ranges = XOBNEWVEC (&objfile->objfile_obstack, | |
9079 | discriminant_range, | |
9080 | n_fields - 1); | |
c9317f21 TT |
9081 | /* Skip the discriminant here. */ |
9082 | for (int i = 1; i < n_fields; ++i) | |
9083 | { | |
9084 | /* Find the final word in the name of this variant's type. | |
9085 | That name can be used to look up the correct | |
9086 | discriminant. */ | |
9087 | const char *variant_name | |
940da03e | 9088 | = rust_last_path_segment (type->field (i).type ()->name ()); |
c9317f21 TT |
9089 | |
9090 | auto iter = discriminant_map.find (variant_name); | |
9091 | if (iter != discriminant_map.end ()) | |
9c6a1327 | 9092 | { |
57d02173 TT |
9093 | ranges[i - 1].low = iter->second; |
9094 | ranges[i - 1].high = iter->second; | |
9c6a1327 | 9095 | } |
c9317f21 | 9096 | |
57d02173 TT |
9097 | /* In Rust, each element should have the size of the |
9098 | enclosing enum. */ | |
9099 | TYPE_LENGTH (type->field (i).type ()) = TYPE_LENGTH (type); | |
9100 | ||
bedda9ac | 9101 | /* Remove the discriminant field, if it exists. */ |
940da03e | 9102 | struct type *sub_type = type->field (i).type (); |
1f704f76 | 9103 | if (sub_type->num_fields () > 0) |
bedda9ac | 9104 | { |
5e33d5f4 | 9105 | sub_type->set_num_fields (sub_type->num_fields () - 1); |
3cabb6b0 | 9106 | sub_type->set_fields (sub_type->fields () + 1); |
bedda9ac | 9107 | } |
9c6a1327 | 9108 | TYPE_FIELD_NAME (type, i) = variant_name; |
d0e39ea2 SM |
9109 | sub_type->set_name |
9110 | (rust_fully_qualify (&objfile->objfile_obstack, | |
7d93a1e0 | 9111 | type->name (), variant_name)); |
c9317f21 | 9112 | } |
9c6a1327 TT |
9113 | |
9114 | /* Indicate that this is a variant type. */ | |
a1520ad8 | 9115 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, -1, |
9c6a1327 TT |
9116 | gdb::array_view<discriminant_range> (ranges, |
9117 | n_fields - 1)); | |
c9317f21 TT |
9118 | } |
9119 | } | |
9120 | ||
9121 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9122 | ||
9123 | static void | |
9124 | rust_union_quirks (struct dwarf2_cu *cu) | |
9125 | { | |
9126 | gdb_assert (cu->language == language_rust); | |
52941706 | 9127 | for (type *type_ : cu->rust_unions) |
5e22e966 | 9128 | quirk_rust_enum (type_, cu->per_objfile->objfile); |
2d79090e TT |
9129 | /* We don't need this any more. */ |
9130 | cu->rust_unions.clear (); | |
c9317f21 TT |
9131 | } |
9132 | ||
8adb8487 TT |
9133 | /* See read.h. */ |
9134 | ||
9135 | type_unit_group_unshareable * | |
9136 | dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group *tu_group) | |
9137 | { | |
9138 | auto iter = this->m_type_units.find (tu_group); | |
9139 | if (iter != this->m_type_units.end ()) | |
9140 | return iter->second.get (); | |
9141 | ||
9142 | type_unit_group_unshareable_up uniq (new type_unit_group_unshareable); | |
9143 | type_unit_group_unshareable *result = uniq.get (); | |
9144 | this->m_type_units[tu_group] = std::move (uniq); | |
9145 | return result; | |
9146 | } | |
9147 | ||
e286671b TT |
9148 | struct type * |
9149 | dwarf2_per_objfile::get_type_for_signatured_type | |
9150 | (signatured_type *sig_type) const | |
9151 | { | |
9152 | auto iter = this->m_type_map.find (sig_type); | |
9153 | if (iter == this->m_type_map.end ()) | |
9154 | return nullptr; | |
9155 | ||
9156 | return iter->second; | |
9157 | } | |
9158 | ||
9159 | void dwarf2_per_objfile::set_type_for_signatured_type | |
9160 | (signatured_type *sig_type, struct type *type) | |
9161 | { | |
9162 | gdb_assert (this->m_type_map.find (sig_type) == this->m_type_map.end ()); | |
9163 | ||
9164 | this->m_type_map[sig_type] = type; | |
9165 | } | |
9166 | ||
95554aad TT |
9167 | /* A helper function for computing the list of all symbol tables |
9168 | included by PER_CU. */ | |
9169 | ||
9170 | static void | |
4c39bc03 | 9171 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9172 | htab_t all_children, htab_t all_type_symtabs, |
43182c09 SM |
9173 | dwarf2_per_cu_data *per_cu, |
9174 | dwarf2_per_objfile *per_objfile, | |
43f3e411 | 9175 | struct compunit_symtab *immediate_parent) |
95554aad | 9176 | { |
af758d11 | 9177 | void **slot = htab_find_slot (all_children, per_cu, INSERT); |
95554aad TT |
9178 | if (*slot != NULL) |
9179 | { | |
9180 | /* This inclusion and its children have been processed. */ | |
9181 | return; | |
9182 | } | |
9183 | ||
9184 | *slot = per_cu; | |
af758d11 | 9185 | |
95554aad | 9186 | /* Only add a CU if it has a symbol table. */ |
43182c09 | 9187 | compunit_symtab *cust = per_objfile->get_symtab (per_cu); |
43f3e411 | 9188 | if (cust != NULL) |
ec94af83 DE |
9189 | { |
9190 | /* If this is a type unit only add its symbol table if we haven't | |
9191 | seen it yet (type unit per_cu's can share symtabs). */ | |
9192 | if (per_cu->is_debug_types) | |
9193 | { | |
43f3e411 | 9194 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9195 | if (*slot == NULL) |
9196 | { | |
43f3e411 | 9197 | *slot = cust; |
4c39bc03 | 9198 | result->push_back (cust); |
43f3e411 DE |
9199 | if (cust->user == NULL) |
9200 | cust->user = immediate_parent; | |
ec94af83 DE |
9201 | } |
9202 | } | |
9203 | else | |
f9125b6c | 9204 | { |
4c39bc03 | 9205 | result->push_back (cust); |
43f3e411 DE |
9206 | if (cust->user == NULL) |
9207 | cust->user = immediate_parent; | |
f9125b6c | 9208 | } |
ec94af83 | 9209 | } |
95554aad | 9210 | |
ae640021 AB |
9211 | if (!per_cu->imported_symtabs_empty ()) |
9212 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9213 | { | |
9214 | recursively_compute_inclusions (result, all_children, | |
43182c09 SM |
9215 | all_type_symtabs, ptr, per_objfile, |
9216 | cust); | |
ae640021 | 9217 | } |
95554aad TT |
9218 | } |
9219 | ||
43f3e411 | 9220 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9221 | PER_CU. */ |
9222 | ||
9223 | static void | |
43182c09 SM |
9224 | compute_compunit_symtab_includes (dwarf2_per_cu_data *per_cu, |
9225 | dwarf2_per_objfile *per_objfile) | |
95554aad | 9226 | { |
f4dc4d17 DE |
9227 | gdb_assert (! per_cu->is_debug_types); |
9228 | ||
ae640021 | 9229 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9230 | { |
ae640021 | 9231 | int len; |
4c39bc03 | 9232 | std::vector<compunit_symtab *> result_symtabs; |
43182c09 | 9233 | compunit_symtab *cust = per_objfile->get_symtab (per_cu); |
95554aad TT |
9234 | |
9235 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9236 | if (cust == NULL) |
95554aad TT |
9237 | return; |
9238 | ||
280a9412 TT |
9239 | htab_up all_children (htab_create_alloc (1, htab_hash_pointer, |
9240 | htab_eq_pointer, | |
9241 | NULL, xcalloc, xfree)); | |
9242 | htab_up all_type_symtabs (htab_create_alloc (1, htab_hash_pointer, | |
9243 | htab_eq_pointer, | |
9244 | NULL, xcalloc, xfree)); | |
95554aad | 9245 | |
ae640021 | 9246 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 | 9247 | { |
280a9412 TT |
9248 | recursively_compute_inclusions (&result_symtabs, all_children.get (), |
9249 | all_type_symtabs.get (), ptr, | |
9250 | per_objfile, cust); | |
ec94af83 | 9251 | } |
95554aad | 9252 | |
ec94af83 | 9253 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9254 | len = result_symtabs.size (); |
43f3e411 | 9255 | cust->includes |
f6e649dd | 9256 | = XOBNEWVEC (&per_objfile->objfile->objfile_obstack, |
8d749320 | 9257 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9258 | memcpy (cust->includes, result_symtabs.data (), |
9259 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9260 | cust->includes[len] = NULL; |
95554aad TT |
9261 | } |
9262 | } | |
9263 | ||
9264 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9265 | read. */ | |
9266 | ||
9267 | static void | |
976ca316 | 9268 | process_cu_includes (dwarf2_per_objfile *per_objfile) |
95554aad | 9269 | { |
976ca316 | 9270 | for (dwarf2_per_cu_data *iter : per_objfile->per_bfd->just_read_cus) |
f4dc4d17 DE |
9271 | { |
9272 | if (! iter->is_debug_types) | |
976ca316 | 9273 | compute_compunit_symtab_includes (iter, per_objfile); |
f4dc4d17 | 9274 | } |
95554aad | 9275 | |
976ca316 | 9276 | per_objfile->per_bfd->just_read_cus.clear (); |
95554aad TT |
9277 | } |
9278 | ||
8fc0b21d | 9279 | /* Generate full symbol information for CU, whose DIEs have |
10b3939b DJ |
9280 | already been loaded into memory. */ |
9281 | ||
9282 | static void | |
8fc0b21d | 9283 | process_full_comp_unit (dwarf2_cu *cu, enum language pretend_language) |
10b3939b | 9284 | { |
976ca316 SM |
9285 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9286 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 9287 | struct gdbarch *gdbarch = objfile->arch (); |
10b3939b | 9288 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9289 | struct compunit_symtab *cust; |
10b3939b | 9290 | CORE_ADDR baseaddr; |
4359dff1 | 9291 | struct block *static_block; |
3e29f34a | 9292 | CORE_ADDR addr; |
10b3939b | 9293 | |
b3b3bada | 9294 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9295 | |
c89b44cd TT |
9296 | /* Clear the list here in case something was left over. */ |
9297 | cu->method_list.clear (); | |
10b3939b | 9298 | |
95554aad TT |
9299 | cu->language = pretend_language; |
9300 | cu->language_defn = language_def (cu->language); | |
9301 | ||
1c47ec3e TV |
9302 | dwarf2_find_base_address (cu->dies, cu); |
9303 | ||
702cf3f5 AB |
9304 | /* Before we start reading the top-level DIE, ensure it has a valid tag |
9305 | type. */ | |
9306 | switch (cu->dies->tag) | |
9307 | { | |
9308 | case DW_TAG_compile_unit: | |
9309 | case DW_TAG_partial_unit: | |
9310 | case DW_TAG_type_unit: | |
9311 | break; | |
9312 | default: | |
9313 | error (_("Dwarf Error: unexpected tag '%s' at offset %s [in module %s]"), | |
9314 | dwarf_tag_name (cu->dies->tag), | |
9315 | sect_offset_str (cu->per_cu->sect_off), | |
9316 | objfile_name (per_objfile->objfile)); | |
9317 | } | |
9318 | ||
c906108c | 9319 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9320 | process_die (cu->dies, cu); |
c906108c | 9321 | |
a766d390 DE |
9322 | /* For now fudge the Go package. */ |
9323 | if (cu->language == language_go) | |
9324 | fixup_go_packaging (cu); | |
9325 | ||
5f48f8f3 | 9326 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9327 | should be complete, and it should now be safe to compute all of the |
9328 | physnames. */ | |
9329 | compute_delayed_physnames (cu); | |
3da10d80 | 9330 | |
c9317f21 TT |
9331 | if (cu->language == language_rust) |
9332 | rust_union_quirks (cu); | |
9333 | ||
fae299cd DC |
9334 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9335 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9336 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9337 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9338 | |
3e29f34a | 9339 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9340 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9341 | |
9342 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9343 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9344 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9345 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9346 | this comp unit. */ | |
9347 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9348 | ||
c24bdb02 | 9349 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9350 | SECT_OFF_TEXT (objfile), |
9351 | 0); | |
c906108c | 9352 | |
43f3e411 | 9353 | if (cust != NULL) |
c906108c | 9354 | { |
df15bd07 | 9355 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9356 | |
8be455d7 JK |
9357 | /* Set symtab language to language from DW_AT_language. If the |
9358 | compilation is from a C file generated by language preprocessors, do | |
9359 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9360 | if (!(cu->language == language_c |
40e3ad0e | 9361 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9362 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9363 | |
9364 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9365 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9366 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9367 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9368 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9369 | |
9370 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9371 | needed, it would be wrong due to missing DW_AT_producer there. | |
9372 | ||
9373 | Still one can confuse GDB by using non-standard GCC compilation | |
9374 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9375 | */ |
ab260dad | 9376 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9377 | cust->locations_valid = 1; |
e0d00bc7 JK |
9378 | |
9379 | if (gcc_4_minor >= 5) | |
43f3e411 | 9380 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9381 | |
43f3e411 | 9382 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9383 | } |
9291a0cd | 9384 | |
976ca316 | 9385 | per_objfile->set_symtab (cu->per_cu, cust); |
c906108c | 9386 | |
95554aad | 9387 | /* Push it for inclusion processing later. */ |
976ca316 | 9388 | per_objfile->per_bfd->just_read_cus.push_back (cu->per_cu); |
804d2729 TT |
9389 | |
9390 | /* Not needed any more. */ | |
c24bdb02 | 9391 | cu->reset_builder (); |
f4dc4d17 | 9392 | } |
45cfd468 | 9393 | |
8fc0b21d | 9394 | /* Generate full symbol information for type unit CU, whose DIEs have |
f4dc4d17 DE |
9395 | already been loaded into memory. */ |
9396 | ||
9397 | static void | |
8fc0b21d | 9398 | process_full_type_unit (dwarf2_cu *cu, |
f4dc4d17 DE |
9399 | enum language pretend_language) |
9400 | { | |
976ca316 SM |
9401 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9402 | struct objfile *objfile = per_objfile->objfile; | |
43f3e411 | 9403 | struct compunit_symtab *cust; |
0186c6a7 DE |
9404 | struct signatured_type *sig_type; |
9405 | ||
8fc0b21d SM |
9406 | gdb_assert (cu->per_cu->is_debug_types); |
9407 | sig_type = (struct signatured_type *) cu->per_cu; | |
f4dc4d17 | 9408 | |
c89b44cd TT |
9409 | /* Clear the list here in case something was left over. */ |
9410 | cu->method_list.clear (); | |
f4dc4d17 | 9411 | |
f4dc4d17 DE |
9412 | cu->language = pretend_language; |
9413 | cu->language_defn = language_def (cu->language); | |
9414 | ||
9415 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9416 | process_die (cu->dies, cu); | |
9417 | ||
9418 | /* For now fudge the Go package. */ | |
9419 | if (cu->language == language_go) | |
9420 | fixup_go_packaging (cu); | |
9421 | ||
5f48f8f3 | 9422 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9423 | should be complete, and it should now be safe to compute all of the |
9424 | physnames. */ | |
9425 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9426 | |
c9317f21 TT |
9427 | if (cu->language == language_rust) |
9428 | rust_union_quirks (cu); | |
9429 | ||
f4dc4d17 DE |
9430 | /* TUs share symbol tables. |
9431 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9432 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9433 | this TU's symbols to the existing symtab. */ | |
8adb8487 | 9434 | type_unit_group_unshareable *tug_unshare = |
976ca316 | 9435 | per_objfile->get_type_unit_group_unshareable (sig_type->type_unit_group); |
8adb8487 | 9436 | if (tug_unshare->compunit_symtab == NULL) |
45cfd468 | 9437 | { |
c24bdb02 KS |
9438 | buildsym_compunit *builder = cu->get_builder (); |
9439 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
8adb8487 | 9440 | tug_unshare->compunit_symtab = cust; |
f4dc4d17 | 9441 | |
43f3e411 | 9442 | if (cust != NULL) |
f4dc4d17 DE |
9443 | { |
9444 | /* Set symtab language to language from DW_AT_language. If the | |
9445 | compilation is from a C file generated by language preprocessors, | |
9446 | do not set the language if it was already deduced by | |
9447 | start_subfile. */ | |
43f3e411 DE |
9448 | if (!(cu->language == language_c |
9449 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9450 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9451 | } |
9452 | } | |
9453 | else | |
9454 | { | |
c24bdb02 | 9455 | cu->get_builder ()->augment_type_symtab (); |
8adb8487 | 9456 | cust = tug_unshare->compunit_symtab; |
f4dc4d17 DE |
9457 | } |
9458 | ||
976ca316 | 9459 | per_objfile->set_symtab (cu->per_cu, cust); |
804d2729 TT |
9460 | |
9461 | /* Not needed any more. */ | |
c24bdb02 | 9462 | cu->reset_builder (); |
c906108c SS |
9463 | } |
9464 | ||
95554aad TT |
9465 | /* Process an imported unit DIE. */ |
9466 | ||
9467 | static void | |
9468 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9469 | { | |
9470 | struct attribute *attr; | |
9471 | ||
f4dc4d17 DE |
9472 | /* For now we don't handle imported units in type units. */ |
9473 | if (cu->per_cu->is_debug_types) | |
9474 | { | |
9475 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9476 | " supported in type units [in module %s]"), | |
5e22e966 | 9477 | objfile_name (cu->per_objfile->objfile)); |
f4dc4d17 DE |
9478 | } |
9479 | ||
95554aad TT |
9480 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9481 | if (attr != NULL) | |
9482 | { | |
0826b30a | 9483 | sect_offset sect_off = attr->get_ref_die_offset (); |
9c541725 | 9484 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
ab432490 | 9485 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9c541725 | 9486 | dwarf2_per_cu_data *per_cu |
ab432490 | 9487 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, per_objfile); |
95554aad | 9488 | |
58990295 TV |
9489 | /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit |
9490 | into another compilation unit, at root level. Regard this as a hint, | |
9491 | and ignore it. */ | |
9492 | if (die->parent && die->parent->parent == NULL | |
9493 | && per_cu->unit_type == DW_UT_compile | |
9494 | && per_cu->lang == language_cplus) | |
9495 | return; | |
9496 | ||
69d751e3 | 9497 | /* If necessary, add it to the queue and load its DIEs. */ |
120ce1b5 | 9498 | if (maybe_queue_comp_unit (cu, per_cu, per_objfile, cu->language)) |
4a636814 SM |
9499 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
9500 | false, cu->language); | |
95554aad | 9501 | |
ae640021 | 9502 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9503 | } |
9504 | } | |
9505 | ||
4c8aa72d PA |
9506 | /* RAII object that represents a process_die scope: i.e., |
9507 | starts/finishes processing a DIE. */ | |
9508 | class process_die_scope | |
adde2bff | 9509 | { |
4c8aa72d PA |
9510 | public: |
9511 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9512 | : m_die (die), m_cu (cu) | |
9513 | { | |
9514 | /* We should only be processing DIEs not already in process. */ | |
9515 | gdb_assert (!m_die->in_process); | |
9516 | m_die->in_process = true; | |
9517 | } | |
8c3cb9fa | 9518 | |
4c8aa72d PA |
9519 | ~process_die_scope () |
9520 | { | |
9521 | m_die->in_process = false; | |
9522 | ||
9523 | /* If we're done processing the DIE for the CU that owns the line | |
9524 | header, we don't need the line header anymore. */ | |
9525 | if (m_cu->line_header_die_owner == m_die) | |
9526 | { | |
9527 | delete m_cu->line_header; | |
9528 | m_cu->line_header = NULL; | |
9529 | m_cu->line_header_die_owner = NULL; | |
9530 | } | |
9531 | } | |
9532 | ||
9533 | private: | |
9534 | die_info *m_die; | |
9535 | dwarf2_cu *m_cu; | |
9536 | }; | |
adde2bff | 9537 | |
c906108c SS |
9538 | /* Process a die and its children. */ |
9539 | ||
9540 | static void | |
e7c27a73 | 9541 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9542 | { |
4c8aa72d | 9543 | process_die_scope scope (die, cu); |
adde2bff | 9544 | |
c906108c SS |
9545 | switch (die->tag) |
9546 | { | |
9547 | case DW_TAG_padding: | |
9548 | break; | |
9549 | case DW_TAG_compile_unit: | |
95554aad | 9550 | case DW_TAG_partial_unit: |
e7c27a73 | 9551 | read_file_scope (die, cu); |
c906108c | 9552 | break; |
348e048f DE |
9553 | case DW_TAG_type_unit: |
9554 | read_type_unit_scope (die, cu); | |
9555 | break; | |
c906108c | 9556 | case DW_TAG_subprogram: |
0a4b0913 AB |
9557 | /* Nested subprograms in Fortran get a prefix. */ |
9558 | if (cu->language == language_fortran | |
9559 | && die->parent != NULL | |
9560 | && die->parent->tag == DW_TAG_subprogram) | |
9561 | cu->processing_has_namespace_info = true; | |
9562 | /* Fall through. */ | |
c906108c | 9563 | case DW_TAG_inlined_subroutine: |
edb3359d | 9564 | read_func_scope (die, cu); |
c906108c SS |
9565 | break; |
9566 | case DW_TAG_lexical_block: | |
14898363 L |
9567 | case DW_TAG_try_block: |
9568 | case DW_TAG_catch_block: | |
e7c27a73 | 9569 | read_lexical_block_scope (die, cu); |
c906108c | 9570 | break; |
216f72a1 | 9571 | case DW_TAG_call_site: |
96408a79 SA |
9572 | case DW_TAG_GNU_call_site: |
9573 | read_call_site_scope (die, cu); | |
9574 | break; | |
c906108c | 9575 | case DW_TAG_class_type: |
680b30c7 | 9576 | case DW_TAG_interface_type: |
c906108c SS |
9577 | case DW_TAG_structure_type: |
9578 | case DW_TAG_union_type: | |
134d01f1 | 9579 | process_structure_scope (die, cu); |
c906108c SS |
9580 | break; |
9581 | case DW_TAG_enumeration_type: | |
134d01f1 | 9582 | process_enumeration_scope (die, cu); |
c906108c | 9583 | break; |
134d01f1 | 9584 | |
f792889a DJ |
9585 | /* These dies have a type, but processing them does not create |
9586 | a symbol or recurse to process the children. Therefore we can | |
9587 | read them on-demand through read_type_die. */ | |
c906108c | 9588 | case DW_TAG_subroutine_type: |
72019c9c | 9589 | case DW_TAG_set_type: |
c906108c | 9590 | case DW_TAG_pointer_type: |
c906108c | 9591 | case DW_TAG_ptr_to_member_type: |
c906108c | 9592 | case DW_TAG_reference_type: |
4297a3f0 | 9593 | case DW_TAG_rvalue_reference_type: |
c906108c | 9594 | case DW_TAG_string_type: |
c906108c | 9595 | break; |
134d01f1 | 9596 | |
d8f62e84 TT |
9597 | case DW_TAG_array_type: |
9598 | /* We only need to handle this case for Ada -- in other | |
9599 | languages, it's normal for the compiler to emit a typedef | |
9600 | instead. */ | |
9601 | if (cu->language != language_ada) | |
9602 | break; | |
9603 | /* FALLTHROUGH */ | |
c906108c | 9604 | case DW_TAG_base_type: |
a02abb62 | 9605 | case DW_TAG_subrange_type: |
cb249c71 | 9606 | case DW_TAG_typedef: |
134d01f1 | 9607 | /* Add a typedef symbol for the type definition, if it has a |
dda83cd7 | 9608 | DW_AT_name. */ |
f792889a | 9609 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9610 | break; |
c906108c | 9611 | case DW_TAG_common_block: |
e7c27a73 | 9612 | read_common_block (die, cu); |
c906108c SS |
9613 | break; |
9614 | case DW_TAG_common_inclusion: | |
9615 | break; | |
d9fa45fe | 9616 | case DW_TAG_namespace: |
9068261f | 9617 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9618 | read_namespace (die, cu); |
d9fa45fe | 9619 | break; |
5d7cb8df | 9620 | case DW_TAG_module: |
9068261f | 9621 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9622 | read_module (die, cu); |
9623 | break; | |
d9fa45fe | 9624 | case DW_TAG_imported_declaration: |
9068261f | 9625 | cu->processing_has_namespace_info = true; |
74921315 KS |
9626 | if (read_namespace_alias (die, cu)) |
9627 | break; | |
86a73007 TT |
9628 | /* The declaration is not a global namespace alias. */ |
9629 | /* Fall through. */ | |
d9fa45fe | 9630 | case DW_TAG_imported_module: |
9068261f | 9631 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9632 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9633 | || cu->language != language_fortran)) | |
b98664d3 | 9634 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9635 | dwarf_tag_name (die->tag)); |
9636 | read_import_statement (die, cu); | |
d9fa45fe | 9637 | break; |
95554aad TT |
9638 | |
9639 | case DW_TAG_imported_unit: | |
9640 | process_imported_unit_die (die, cu); | |
9641 | break; | |
9642 | ||
71a3c369 TT |
9643 | case DW_TAG_variable: |
9644 | read_variable (die, cu); | |
9645 | break; | |
9646 | ||
c906108c | 9647 | default: |
e7c27a73 | 9648 | new_symbol (die, NULL, cu); |
c906108c SS |
9649 | break; |
9650 | } | |
9651 | } | |
ca69b9e6 DE |
9652 | \f |
9653 | /* DWARF name computation. */ | |
c906108c | 9654 | |
94af9270 KS |
9655 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9656 | needs to have the name of the scope prepended to the name listed in the | |
9657 | die. */ | |
9658 | ||
9659 | static int | |
9660 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9661 | { | |
1c809c68 TT |
9662 | struct attribute *attr; |
9663 | ||
94af9270 KS |
9664 | switch (die->tag) |
9665 | { | |
9666 | case DW_TAG_namespace: | |
9667 | case DW_TAG_typedef: | |
9668 | case DW_TAG_class_type: | |
9669 | case DW_TAG_interface_type: | |
9670 | case DW_TAG_structure_type: | |
9671 | case DW_TAG_union_type: | |
9672 | case DW_TAG_enumeration_type: | |
9673 | case DW_TAG_enumerator: | |
9674 | case DW_TAG_subprogram: | |
08a76f8a | 9675 | case DW_TAG_inlined_subroutine: |
94af9270 | 9676 | case DW_TAG_member: |
74921315 | 9677 | case DW_TAG_imported_declaration: |
94af9270 KS |
9678 | return 1; |
9679 | ||
9680 | case DW_TAG_variable: | |
c2b0a229 | 9681 | case DW_TAG_constant: |
94af9270 KS |
9682 | /* We only need to prefix "globally" visible variables. These include |
9683 | any variable marked with DW_AT_external or any variable that | |
9684 | lives in a namespace. [Variables in anonymous namespaces | |
9685 | require prefixing, but they are not DW_AT_external.] */ | |
9686 | ||
9687 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9688 | { | |
9689 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9690 | |
94af9270 KS |
9691 | return die_needs_namespace (die_specification (die, &spec_cu), |
9692 | spec_cu); | |
9693 | } | |
9694 | ||
1c809c68 | 9695 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9696 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9697 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9698 | return 0; |
9699 | /* A variable in a lexical block of some kind does not need a | |
9700 | namespace, even though in C++ such variables may be external | |
9701 | and have a mangled name. */ | |
9702 | if (die->parent->tag == DW_TAG_lexical_block | |
9703 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9704 | || die->parent->tag == DW_TAG_catch_block |
9705 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9706 | return 0; |
9707 | return 1; | |
94af9270 KS |
9708 | |
9709 | default: | |
9710 | return 0; | |
9711 | } | |
9712 | } | |
9713 | ||
73b9be8b KS |
9714 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9715 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9716 | defined for the given DIE. */ | |
9717 | ||
9718 | static struct attribute * | |
9719 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9720 | { | |
9721 | struct attribute *attr; | |
9722 | ||
9723 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9724 | if (attr == NULL) | |
9725 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9726 | ||
9727 | return attr; | |
9728 | } | |
9729 | ||
9730 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9731 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9732 | defined for the given DIE. */ | |
9733 | ||
9734 | static const char * | |
9735 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9736 | { | |
9737 | const char *linkage_name; | |
9738 | ||
9739 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9740 | if (linkage_name == NULL) | |
9741 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9742 | ||
787de330 TT |
9743 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9744 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9745 | if (cu->language == language_rust && linkage_name != NULL | |
9746 | && strchr (linkage_name, '{') != NULL) | |
9747 | linkage_name = NULL; | |
9748 | ||
73b9be8b KS |
9749 | return linkage_name; |
9750 | } | |
9751 | ||
94af9270 | 9752 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9753 | compute the physname for the object, which include a method's: |
9c37b5ae | 9754 | - formal parameters (C++), |
a766d390 | 9755 | - receiver type (Go), |
a766d390 DE |
9756 | |
9757 | The term "physname" is a bit confusing. | |
9758 | For C++, for example, it is the demangled name. | |
9759 | For Go, for example, it's the mangled name. | |
94af9270 | 9760 | |
af6b7be1 JB |
9761 | For Ada, return the DIE's linkage name rather than the fully qualified |
9762 | name. PHYSNAME is ignored.. | |
9763 | ||
5989a64e | 9764 | The result is allocated on the objfile->per_bfd's obstack and |
45940949 | 9765 | canonicalized. */ |
94af9270 KS |
9766 | |
9767 | static const char * | |
15d034d0 TT |
9768 | dwarf2_compute_name (const char *name, |
9769 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9770 | int physname) |
9771 | { | |
5e22e966 | 9772 | struct objfile *objfile = cu->per_objfile->objfile; |
bb5ed363 | 9773 | |
94af9270 KS |
9774 | if (name == NULL) |
9775 | name = dwarf2_name (die, cu); | |
9776 | ||
2ee7123e DE |
9777 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9778 | but otherwise compute it by typename_concat inside GDB. | |
9779 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 9780 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 9781 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
9782 | will set the demangled name to the result of dwarf2_full_name, and it is |
9783 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9784 | if (cu->language == language_ada |
9785 | || (cu->language == language_fortran && physname)) | |
9786 | { | |
9787 | /* For Ada unit, we prefer the linkage name over the name, as | |
9788 | the former contains the exported name, which the user expects | |
9789 | to be able to reference. Ideally, we want the user to be able | |
9790 | to reference this entity using either natural or linkage name, | |
9791 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9792 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9793 | |
2ee7123e DE |
9794 | if (linkage_name != NULL) |
9795 | return linkage_name; | |
f55ee35c JK |
9796 | } |
9797 | ||
94af9270 KS |
9798 | /* These are the only languages we know how to qualify names in. */ |
9799 | if (name != NULL | |
9c37b5ae | 9800 | && (cu->language == language_cplus |
c44af4eb TT |
9801 | || cu->language == language_fortran || cu->language == language_d |
9802 | || cu->language == language_rust)) | |
94af9270 KS |
9803 | { |
9804 | if (die_needs_namespace (die, cu)) | |
9805 | { | |
0d5cff50 | 9806 | const char *prefix; |
34a68019 | 9807 | const char *canonical_name = NULL; |
94af9270 | 9808 | |
d7e74731 PA |
9809 | string_file buf; |
9810 | ||
94af9270 | 9811 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9812 | if (*prefix != '\0') |
9813 | { | |
43816ebc TT |
9814 | gdb::unique_xmalloc_ptr<char> prefixed_name |
9815 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 9816 | |
43816ebc | 9817 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
9818 | } |
9819 | else | |
d7e74731 | 9820 | buf.puts (name); |
94af9270 | 9821 | |
98bfdba5 PA |
9822 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9823 | as children with DW_TAG_template_type_param or | |
9824 | DW_TAG_value_type_param. If the latter, add them to the name | |
9825 | here. If the name already has template parameters, then | |
9826 | skip this step; some versions of GCC emit both, and | |
9827 | it is more efficient to use the pre-computed name. | |
9828 | ||
9829 | Something to keep in mind about this process: it is very | |
9830 | unlikely, or in some cases downright impossible, to produce | |
9831 | something that will match the mangled name of a function. | |
9832 | If the definition of the function has the same debug info, | |
9833 | we should be able to match up with it anyway. But fallbacks | |
9834 | using the minimal symbol, for instance to find a method | |
9835 | implemented in a stripped copy of libstdc++, will not work. | |
9836 | If we do not have debug info for the definition, we will have to | |
9837 | match them up some other way. | |
9838 | ||
9839 | When we do name matching there is a related problem with function | |
9840 | templates; two instantiated function templates are allowed to | |
9841 | differ only by their return types, which we do not add here. */ | |
9842 | ||
9843 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9844 | { | |
9845 | struct attribute *attr; | |
9846 | struct die_info *child; | |
9847 | int first = 1; | |
2c75ccb2 | 9848 | const language_defn *cplus_lang = language_def (cu->language); |
98bfdba5 PA |
9849 | |
9850 | die->building_fullname = 1; | |
9851 | ||
9852 | for (child = die->child; child != NULL; child = child->sibling) | |
9853 | { | |
9854 | struct type *type; | |
12df843f | 9855 | LONGEST value; |
d521ce57 | 9856 | const gdb_byte *bytes; |
98bfdba5 PA |
9857 | struct dwarf2_locexpr_baton *baton; |
9858 | struct value *v; | |
9859 | ||
9860 | if (child->tag != DW_TAG_template_type_param | |
9861 | && child->tag != DW_TAG_template_value_param) | |
9862 | continue; | |
9863 | ||
9864 | if (first) | |
9865 | { | |
d7e74731 | 9866 | buf.puts ("<"); |
98bfdba5 PA |
9867 | first = 0; |
9868 | } | |
9869 | else | |
d7e74731 | 9870 | buf.puts (", "); |
98bfdba5 PA |
9871 | |
9872 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9873 | if (attr == NULL) | |
9874 | { | |
b98664d3 | 9875 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 9876 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9877 | continue; |
9878 | } | |
9879 | type = die_type (child, cu); | |
9880 | ||
9881 | if (child->tag == DW_TAG_template_type_param) | |
9882 | { | |
2c75ccb2 AB |
9883 | cplus_lang->print_type (type, "", &buf, -1, 0, |
9884 | &type_print_raw_options); | |
98bfdba5 PA |
9885 | continue; |
9886 | } | |
9887 | ||
9888 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9889 | if (attr == NULL) | |
9890 | { | |
b98664d3 | 9891 | complaint (_("template parameter missing " |
3e43a32a | 9892 | "DW_AT_const_value")); |
d7e74731 | 9893 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9894 | continue; |
9895 | } | |
9896 | ||
9897 | dwarf2_const_value_attr (attr, type, name, | |
9898 | &cu->comp_unit_obstack, cu, | |
9899 | &value, &bytes, &baton); | |
9900 | ||
20ce4123 | 9901 | if (type->has_no_signedness ()) |
98bfdba5 PA |
9902 | /* GDB prints characters as NUMBER 'CHAR'. If that's |
9903 | changed, this can use value_print instead. */ | |
2c75ccb2 | 9904 | cplus_lang->printchar (value, type, &buf); |
98bfdba5 PA |
9905 | else |
9906 | { | |
9907 | struct value_print_options opts; | |
9908 | ||
9909 | if (baton != NULL) | |
9910 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9911 | baton->data, | |
9912 | baton->size, | |
9f47c707 SM |
9913 | baton->per_cu, |
9914 | baton->per_objfile); | |
98bfdba5 PA |
9915 | else if (bytes != NULL) |
9916 | { | |
9917 | v = allocate_value (type); | |
9918 | memcpy (value_contents_writeable (v), bytes, | |
9919 | TYPE_LENGTH (type)); | |
9920 | } | |
9921 | else | |
9922 | v = value_from_longest (type, value); | |
9923 | ||
3e43a32a MS |
9924 | /* Specify decimal so that we do not depend on |
9925 | the radix. */ | |
98bfdba5 PA |
9926 | get_formatted_print_options (&opts, 'd'); |
9927 | opts.raw = 1; | |
d7e74731 | 9928 | value_print (v, &buf, &opts); |
98bfdba5 | 9929 | release_value (v); |
98bfdba5 PA |
9930 | } |
9931 | } | |
9932 | ||
9933 | die->building_fullname = 0; | |
9934 | ||
9935 | if (!first) | |
9936 | { | |
9937 | /* Close the argument list, with a space if necessary | |
9938 | (nested templates). */ | |
d7e74731 PA |
9939 | if (!buf.empty () && buf.string ().back () == '>') |
9940 | buf.puts (" >"); | |
98bfdba5 | 9941 | else |
d7e74731 | 9942 | buf.puts (">"); |
98bfdba5 PA |
9943 | } |
9944 | } | |
9945 | ||
9c37b5ae | 9946 | /* For C++ methods, append formal parameter type |
94af9270 | 9947 | information, if PHYSNAME. */ |
6e70227d | 9948 | |
94af9270 | 9949 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9950 | && cu->language == language_cplus) |
94af9270 KS |
9951 | { |
9952 | struct type *type = read_type_die (die, cu); | |
9953 | ||
d7e74731 | 9954 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9955 | &type_print_raw_options); |
94af9270 | 9956 | |
9c37b5ae | 9957 | if (cu->language == language_cplus) |
94af9270 | 9958 | { |
60430eff DJ |
9959 | /* Assume that an artificial first parameter is |
9960 | "this", but do not crash if it is not. RealView | |
9961 | marks unnamed (and thus unused) parameters as | |
9962 | artificial; there is no way to differentiate | |
9963 | the two cases. */ | |
1f704f76 | 9964 | if (type->num_fields () > 0 |
94af9270 | 9965 | && TYPE_FIELD_ARTIFICIAL (type, 0) |
940da03e SM |
9966 | && type->field (0).type ()->code () == TYPE_CODE_PTR |
9967 | && TYPE_CONST (TYPE_TARGET_TYPE (type->field (0).type ()))) | |
d7e74731 | 9968 | buf.puts (" const"); |
94af9270 KS |
9969 | } |
9970 | } | |
9971 | ||
d7e74731 | 9972 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9973 | |
9974 | if (cu->language == language_cplus) | |
34a68019 | 9975 | canonical_name |
322a8516 | 9976 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
be1e3d3e | 9977 | objfile); |
34a68019 TT |
9978 | |
9979 | /* If we only computed INTERMEDIATE_NAME, or if | |
9980 | INTERMEDIATE_NAME is already canonical, then we need to | |
be1e3d3e | 9981 | intern it. */ |
322a8516 | 9982 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
be1e3d3e | 9983 | name = objfile->intern (intermediate_name); |
34a68019 TT |
9984 | else |
9985 | name = canonical_name; | |
94af9270 KS |
9986 | } |
9987 | } | |
9988 | ||
9989 | return name; | |
9990 | } | |
9991 | ||
0114d602 DJ |
9992 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9993 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9994 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9995 | not have a name. NAME may either be from a previous call to |
9996 | dwarf2_name or NULL. | |
9997 | ||
9c37b5ae | 9998 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9999 | |
10000 | static const char * | |
15d034d0 | 10001 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10002 | { |
94af9270 KS |
10003 | return dwarf2_compute_name (name, die, cu, 0); |
10004 | } | |
0114d602 | 10005 | |
94af9270 KS |
10006 | /* Construct a physname for the given DIE in CU. NAME may either be |
10007 | from a previous call to dwarf2_name or NULL. The result will be | |
10008 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10009 | name. | |
0114d602 | 10010 | |
9c37b5ae | 10011 | The output string will be canonicalized (if C++). */ |
0114d602 | 10012 | |
94af9270 | 10013 | static const char * |
15d034d0 | 10014 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10015 | { |
5e22e966 | 10016 | struct objfile *objfile = cu->per_objfile->objfile; |
900e11f9 | 10017 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10018 | int need_copy = 1; |
10019 | ||
10020 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10021 | on its own. */ | |
10022 | if (!die_needs_namespace (die, cu)) | |
10023 | return dwarf2_compute_name (name, die, cu, 1); | |
10024 | ||
906bb4c5 TT |
10025 | if (cu->language != language_rust) |
10026 | mangled = dw2_linkage_name (die, cu); | |
900e11f9 JK |
10027 | |
10028 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
10029 | has computed. */ | |
791afaa2 | 10030 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10031 | if (mangled != NULL) |
900e11f9 | 10032 | { |
900e11f9 | 10033 | |
d3355e4d | 10034 | if (language_def (cu->language)->store_sym_names_in_linkage_form_p ()) |
59cc4834 JB |
10035 | { |
10036 | /* Do nothing (do not demangle the symbol name). */ | |
10037 | } | |
a766d390 DE |
10038 | else |
10039 | { | |
0eb876f5 JB |
10040 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10041 | their return type. It is easier for GDB users to search | |
10042 | for such functions as `name(params)' than `long name(params)'. | |
10043 | In such case the minimal symbol names do not match the full | |
10044 | symbol names but for template functions there is never a need | |
10045 | to look up their definition from their declaration so | |
10046 | the only disadvantage remains the minimal symbol variant | |
10047 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10048 | demangled.reset (gdb_demangle (mangled, |
10049 | (DMGL_PARAMS | DMGL_ANSI | |
10050 | | DMGL_RET_DROP))); | |
a766d390 | 10051 | } |
900e11f9 | 10052 | if (demangled) |
791afaa2 | 10053 | canon = demangled.get (); |
900e11f9 JK |
10054 | else |
10055 | { | |
10056 | canon = mangled; | |
10057 | need_copy = 0; | |
10058 | } | |
10059 | } | |
10060 | ||
10061 | if (canon == NULL || check_physname) | |
10062 | { | |
10063 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10064 | ||
10065 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10066 | { | |
10067 | /* It may not mean a bug in GDB. The compiler could also | |
10068 | compute DW_AT_linkage_name incorrectly. But in such case | |
10069 | GDB would need to be bug-to-bug compatible. */ | |
10070 | ||
b98664d3 | 10071 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10072 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10073 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10074 | objfile_name (objfile)); |
900e11f9 JK |
10075 | |
10076 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10077 | is available here - over computed PHYSNAME. It is safer | |
10078 | against both buggy GDB and buggy compilers. */ | |
10079 | ||
10080 | retval = canon; | |
10081 | } | |
10082 | else | |
10083 | { | |
10084 | retval = physname; | |
10085 | need_copy = 0; | |
10086 | } | |
10087 | } | |
10088 | else | |
10089 | retval = canon; | |
10090 | ||
10091 | if (need_copy) | |
be1e3d3e | 10092 | retval = objfile->intern (retval); |
900e11f9 | 10093 | |
900e11f9 | 10094 | return retval; |
0114d602 DJ |
10095 | } |
10096 | ||
74921315 KS |
10097 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10098 | a new symbol for it. | |
10099 | ||
10100 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10101 | ||
10102 | static int | |
10103 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10104 | { | |
10105 | struct attribute *attr; | |
10106 | ||
10107 | /* If the die does not have a name, this is not a namespace | |
10108 | alias. */ | |
10109 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10110 | if (attr != NULL) | |
10111 | { | |
10112 | int num; | |
10113 | struct die_info *d = die; | |
10114 | struct dwarf2_cu *imported_cu = cu; | |
10115 | ||
10116 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10117 | keep inspecting DIEs until we hit the underlying import. */ | |
10118 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10119 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10120 | { | |
10121 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10122 | if (attr == NULL) | |
10123 | break; | |
10124 | ||
10125 | d = follow_die_ref (d, attr, &imported_cu); | |
10126 | if (d->tag != DW_TAG_imported_declaration) | |
10127 | break; | |
10128 | } | |
10129 | ||
10130 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10131 | { | |
b98664d3 | 10132 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10133 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10134 | return 0; |
10135 | } | |
10136 | ||
10137 | if (attr != NULL) | |
10138 | { | |
10139 | struct type *type; | |
0826b30a | 10140 | sect_offset sect_off = attr->get_ref_die_offset (); |
74921315 | 10141 | |
aa66c379 | 10142 | type = get_die_type_at_offset (sect_off, cu->per_cu, cu->per_objfile); |
78134374 | 10143 | if (type != NULL && type->code () == TYPE_CODE_NAMESPACE) |
74921315 KS |
10144 | { |
10145 | /* This declaration is a global namespace alias. Add | |
10146 | a symbol for it whose type is the aliased namespace. */ | |
10147 | new_symbol (die, type, cu); | |
10148 | return 1; | |
10149 | } | |
10150 | } | |
10151 | } | |
10152 | ||
10153 | return 0; | |
10154 | } | |
10155 | ||
22cee43f | 10156 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10157 | current context for CU. |
22cee43f PMR |
10158 | |
10159 | For Ada, imported declarations can materialize renamings, which *may* be | |
10160 | global. However it is impossible (for now?) in DWARF to distinguish | |
10161 | "external" imported declarations and "static" ones. As all imported | |
10162 | declarations seem to be static in all other languages, make them all CU-wide | |
10163 | global only in Ada. */ | |
10164 | ||
10165 | static struct using_direct ** | |
804d2729 | 10166 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10167 | { |
c24bdb02 KS |
10168 | if (cu->language == language_ada |
10169 | && cu->get_builder ()->outermost_context_p ()) | |
10170 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10171 | else |
c24bdb02 | 10172 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10173 | } |
10174 | ||
27aa8d6a SW |
10175 | /* Read the import statement specified by the given die and record it. */ |
10176 | ||
10177 | static void | |
10178 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10179 | { | |
5e22e966 | 10180 | struct objfile *objfile = cu->per_objfile->objfile; |
27aa8d6a | 10181 | struct attribute *import_attr; |
32019081 | 10182 | struct die_info *imported_die, *child_die; |
de4affc9 | 10183 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10184 | const char *imported_name; |
794684b6 | 10185 | const char *imported_name_prefix; |
13387711 SW |
10186 | const char *canonical_name; |
10187 | const char *import_alias; | |
10188 | const char *imported_declaration = NULL; | |
794684b6 | 10189 | const char *import_prefix; |
eb1e02fd | 10190 | std::vector<const char *> excludes; |
13387711 | 10191 | |
27aa8d6a SW |
10192 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10193 | if (import_attr == NULL) | |
10194 | { | |
b98664d3 | 10195 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10196 | dwarf_tag_name (die->tag)); |
10197 | return; | |
10198 | } | |
10199 | ||
de4affc9 CC |
10200 | imported_cu = cu; |
10201 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10202 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10203 | if (imported_name == NULL) |
10204 | { | |
10205 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10206 | ||
dda83cd7 SM |
10207 | The import in the following code: |
10208 | namespace A | |
10209 | { | |
10210 | typedef int B; | |
10211 | } | |
10212 | ||
10213 | int main () | |
10214 | { | |
10215 | using A::B; | |
10216 | B b; | |
10217 | return b; | |
10218 | } | |
10219 | ||
10220 | ... | |
10221 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10222 | <52> DW_AT_decl_file : 1 | |
10223 | <53> DW_AT_decl_line : 6 | |
10224 | <54> DW_AT_import : <0x75> | |
10225 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10226 | <59> DW_AT_name : B | |
10227 | <5b> DW_AT_decl_file : 1 | |
10228 | <5c> DW_AT_decl_line : 2 | |
10229 | <5d> DW_AT_type : <0x6e> | |
10230 | ... | |
10231 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10232 | <76> DW_AT_byte_size : 4 | |
10233 | <77> DW_AT_encoding : 5 (signed) | |
10234 | ||
10235 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10236 | This case will be ignored until the gcc bug is fixed. */ | |
27aa8d6a SW |
10237 | return; |
10238 | } | |
10239 | ||
82856980 SW |
10240 | /* Figure out the local name after import. */ |
10241 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10242 | |
794684b6 SW |
10243 | /* Figure out where the statement is being imported to. */ |
10244 | import_prefix = determine_prefix (die, cu); | |
10245 | ||
10246 | /* Figure out what the scope of the imported die is and prepend it | |
10247 | to the name of the imported die. */ | |
de4affc9 | 10248 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10249 | |
f55ee35c JK |
10250 | if (imported_die->tag != DW_TAG_namespace |
10251 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10252 | { |
13387711 SW |
10253 | imported_declaration = imported_name; |
10254 | canonical_name = imported_name_prefix; | |
794684b6 | 10255 | } |
13387711 | 10256 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10257 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10258 | imported_name_prefix, |
10259 | (cu->language == language_d ? "." : "::"), | |
10260 | imported_name, (char *) NULL); | |
13387711 SW |
10261 | else |
10262 | canonical_name = imported_name; | |
794684b6 | 10263 | |
32019081 JK |
10264 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10265 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 10266 | child_die = child_die->sibling) |
32019081 JK |
10267 | { |
10268 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10269 | represented by an imported module entry with an import attribute | |
10270 | referring to the module and owned entries corresponding to those | |
10271 | entities that are renamed as part of being imported. */ | |
10272 | ||
10273 | if (child_die->tag != DW_TAG_imported_declaration) | |
10274 | { | |
b98664d3 | 10275 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10276 | "- DIE at %s [in module %s]"), |
10277 | sect_offset_str (child_die->sect_off), | |
10278 | objfile_name (objfile)); | |
32019081 JK |
10279 | continue; |
10280 | } | |
10281 | ||
10282 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10283 | if (import_attr == NULL) | |
10284 | { | |
b98664d3 | 10285 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10286 | dwarf_tag_name (child_die->tag)); |
10287 | continue; | |
10288 | } | |
10289 | ||
10290 | imported_cu = cu; | |
10291 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10292 | &imported_cu); | |
10293 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10294 | if (imported_name == NULL) | |
10295 | { | |
b98664d3 | 10296 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10297 | "imported name - DIE at %s [in module %s]"), |
10298 | sect_offset_str (child_die->sect_off), | |
10299 | objfile_name (objfile)); | |
32019081 JK |
10300 | continue; |
10301 | } | |
10302 | ||
eb1e02fd | 10303 | excludes.push_back (imported_name); |
32019081 JK |
10304 | |
10305 | process_die (child_die, cu); | |
10306 | } | |
10307 | ||
804d2729 | 10308 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10309 | import_prefix, |
10310 | canonical_name, | |
10311 | import_alias, | |
10312 | imported_declaration, | |
10313 | excludes, | |
10314 | 0, | |
10315 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10316 | } |
10317 | ||
5230b05a WT |
10318 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10319 | types, but gives them a size of zero. Starting with version 14, | |
10320 | ICC is compatible with GCC. */ | |
10321 | ||
9068261f | 10322 | static bool |
5230b05a WT |
10323 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10324 | { | |
10325 | if (!cu->checked_producer) | |
10326 | check_producer (cu); | |
10327 | ||
10328 | return cu->producer_is_icc_lt_14; | |
10329 | } | |
10330 | ||
eb77c9df AB |
10331 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10332 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10333 | which says that void functions should not have a DW_AT_type. */ | |
10334 | ||
10335 | static bool | |
10336 | producer_is_icc (struct dwarf2_cu *cu) | |
10337 | { | |
10338 | if (!cu->checked_producer) | |
10339 | check_producer (cu); | |
10340 | ||
10341 | return cu->producer_is_icc; | |
10342 | } | |
10343 | ||
1b80a9fa JK |
10344 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10345 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10346 | this, it was first present in GCC release 4.3.0. */ | |
10347 | ||
9068261f | 10348 | static bool |
1b80a9fa JK |
10349 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10350 | { | |
10351 | if (!cu->checked_producer) | |
10352 | check_producer (cu); | |
10353 | ||
10354 | return cu->producer_is_gcc_lt_4_3; | |
10355 | } | |
10356 | ||
d721ba37 PA |
10357 | static file_and_directory |
10358 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10359 | { |
d721ba37 PA |
10360 | file_and_directory res; |
10361 | ||
9291a0cd TT |
10362 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10363 | is not a source language identifier. */ | |
d721ba37 PA |
10364 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10365 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10366 | |
d721ba37 PA |
10367 | if (res.comp_dir == NULL |
10368 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10369 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10370 | { |
d721ba37 PA |
10371 | res.comp_dir_storage = ldirname (res.name); |
10372 | if (!res.comp_dir_storage.empty ()) | |
10373 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10374 | } |
d721ba37 | 10375 | if (res.comp_dir != NULL) |
9291a0cd TT |
10376 | { |
10377 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10378 | directory, get rid of it. */ | |
d721ba37 | 10379 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10380 | |
d721ba37 PA |
10381 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10382 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10383 | } |
10384 | ||
d721ba37 PA |
10385 | if (res.name == NULL) |
10386 | res.name = "<unknown>"; | |
10387 | ||
10388 | return res; | |
9291a0cd TT |
10389 | } |
10390 | ||
f4dc4d17 DE |
10391 | /* Handle DW_AT_stmt_list for a compilation unit. |
10392 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10393 | COMP_DIR is the compilation directory. LOWPC is passed to |
10394 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10395 | |
10396 | static void | |
10397 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10398 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10399 | { |
976ca316 | 10400 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
2ab95328 | 10401 | struct attribute *attr; |
527f3840 JK |
10402 | struct line_header line_header_local; |
10403 | hashval_t line_header_local_hash; | |
527f3840 JK |
10404 | void **slot; |
10405 | int decode_mapping; | |
2ab95328 | 10406 | |
f4dc4d17 DE |
10407 | gdb_assert (! cu->per_cu->is_debug_types); |
10408 | ||
2ab95328 | 10409 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
d4df075e | 10410 | if (attr == NULL || !attr->form_is_unsigned ()) |
527f3840 JK |
10411 | return; |
10412 | ||
d4df075e | 10413 | sect_offset line_offset = (sect_offset) attr->as_unsigned (); |
527f3840 JK |
10414 | |
10415 | /* The line header hash table is only created if needed (it exists to | |
10416 | prevent redundant reading of the line table for partial_units). | |
10417 | If we're given a partial_unit, we'll need it. If we're given a | |
10418 | compile_unit, then use the line header hash table if it's already | |
10419 | created, but don't create one just yet. */ | |
10420 | ||
976ca316 | 10421 | if (per_objfile->line_header_hash == NULL |
527f3840 | 10422 | && die->tag == DW_TAG_partial_unit) |
2ab95328 | 10423 | { |
976ca316 | 10424 | per_objfile->line_header_hash |
d15acc42 TT |
10425 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10426 | line_header_eq_voidp, | |
ef5f598c | 10427 | htab_delete_entry<line_header>, |
d15acc42 | 10428 | xcalloc, xfree)); |
527f3840 | 10429 | } |
2ab95328 | 10430 | |
9c541725 | 10431 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10432 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10433 | line_header_local_hash = line_header_hash (&line_header_local); | |
976ca316 | 10434 | if (per_objfile->line_header_hash != NULL) |
527f3840 | 10435 | { |
976ca316 | 10436 | slot = htab_find_slot_with_hash (per_objfile->line_header_hash.get (), |
527f3840 JK |
10437 | &line_header_local, |
10438 | line_header_local_hash, NO_INSERT); | |
10439 | ||
10440 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10441 | is not present in *SLOT (since if there is something in *SLOT then | |
10442 | it will be for a partial_unit). */ | |
10443 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10444 | { |
527f3840 | 10445 | gdb_assert (*slot != NULL); |
9a3c8263 | 10446 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10447 | return; |
dee91e82 | 10448 | } |
2ab95328 | 10449 | } |
527f3840 JK |
10450 | |
10451 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10452 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10453 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10454 | if (lh == NULL) | |
527f3840 | 10455 | return; |
4c8aa72d PA |
10456 | |
10457 | cu->line_header = lh.release (); | |
10458 | cu->line_header_die_owner = die; | |
527f3840 | 10459 | |
976ca316 | 10460 | if (per_objfile->line_header_hash == NULL) |
527f3840 JK |
10461 | slot = NULL; |
10462 | else | |
10463 | { | |
976ca316 | 10464 | slot = htab_find_slot_with_hash (per_objfile->line_header_hash.get (), |
527f3840 JK |
10465 | &line_header_local, |
10466 | line_header_local_hash, INSERT); | |
10467 | gdb_assert (slot != NULL); | |
10468 | } | |
10469 | if (slot != NULL && *slot == NULL) | |
10470 | { | |
10471 | /* This newly decoded line number information unit will be owned | |
10472 | by line_header_hash hash table. */ | |
10473 | *slot = cu->line_header; | |
4c8aa72d | 10474 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10475 | } |
10476 | else | |
10477 | { | |
10478 | /* We cannot free any current entry in (*slot) as that struct line_header | |
dda83cd7 | 10479 | may be already used by multiple CUs. Create only temporary decoded |
527f3840 JK |
10480 | line_header for this CU - it may happen at most once for each line |
10481 | number information unit. And if we're not using line_header_hash | |
10482 | then this is what we want as well. */ | |
10483 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10484 | } |
10485 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10486 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10487 | decode_mapping); | |
fff8551c | 10488 | |
2ab95328 TT |
10489 | } |
10490 | ||
95554aad | 10491 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10492 | |
c906108c | 10493 | static void |
e7c27a73 | 10494 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10495 | { |
976ca316 SM |
10496 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
10497 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 10498 | struct gdbarch *gdbarch = objfile->arch (); |
2acceee2 | 10499 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10500 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10501 | struct attribute *attr; | |
c906108c | 10502 | struct die_info *child_die; |
e142c38c | 10503 | CORE_ADDR baseaddr; |
6e70227d | 10504 | |
380618d6 | 10505 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10506 | baseaddr = objfile->text_section_offset (); |
c906108c | 10507 | |
fae299cd | 10508 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10509 | |
10510 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10511 | from finish_block. */ | |
2acceee2 | 10512 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10513 | lowpc = highpc; |
3e29f34a | 10514 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10515 | |
d721ba37 | 10516 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10517 | |
f4b8a18d KW |
10518 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10519 | standardised yet. As a workaround for the language detection we fall | |
10520 | back to the DW_AT_producer string. */ | |
10521 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10522 | cu->language = language_opencl; | |
10523 | ||
3019eac3 DE |
10524 | /* Similar hack for Go. */ |
10525 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10526 | set_cu_language (DW_LANG_Go, cu); | |
10527 | ||
c24bdb02 | 10528 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10529 | |
10530 | /* Decode line number information if present. We do this before | |
10531 | processing child DIEs, so that the line header table is available | |
10532 | for DW_AT_decl_file. */ | |
d721ba37 | 10533 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10534 | |
10535 | /* Process all dies in compilation unit. */ | |
10536 | if (die->child != NULL) | |
10537 | { | |
10538 | child_die = die->child; | |
10539 | while (child_die && child_die->tag) | |
10540 | { | |
10541 | process_die (child_die, cu); | |
436c571c | 10542 | child_die = child_die->sibling; |
3019eac3 DE |
10543 | } |
10544 | } | |
10545 | ||
10546 | /* Decode macro information, if present. Dwarf 2 macro information | |
10547 | refers to information in the line number info statement program | |
10548 | header, so we can only read it if we've read the header | |
10549 | successfully. */ | |
0af92d60 JK |
10550 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10551 | if (attr == NULL) | |
10552 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
529908cb | 10553 | if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) |
3019eac3 DE |
10554 | { |
10555 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10556 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10557 | |
529908cb | 10558 | dwarf_decode_macros (cu, attr->as_unsigned (), 1); |
3019eac3 DE |
10559 | } |
10560 | else | |
10561 | { | |
10562 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
529908cb | 10563 | if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) |
3019eac3 | 10564 | { |
529908cb | 10565 | unsigned int macro_offset = attr->as_unsigned (); |
3019eac3 | 10566 | |
43f3e411 | 10567 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10568 | } |
10569 | } | |
3019eac3 DE |
10570 | } |
10571 | ||
c24bdb02 KS |
10572 | void |
10573 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10574 | { |
f4dc4d17 DE |
10575 | struct type_unit_group *tu_group; |
10576 | int first_time; | |
3019eac3 | 10577 | struct attribute *attr; |
9c541725 | 10578 | unsigned int i; |
0186c6a7 | 10579 | struct signatured_type *sig_type; |
3019eac3 | 10580 | |
f4dc4d17 | 10581 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10582 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10583 | |
c24bdb02 | 10584 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10585 | |
f4dc4d17 | 10586 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10587 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10588 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10589 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10590 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10591 | |
10592 | /* If we've already processed this stmt_list there's no real need to | |
10593 | do it again, we could fake it and just recreate the part we need | |
10594 | (file name,index -> symtab mapping). If data shows this optimization | |
10595 | is useful we can do it then. */ | |
8adb8487 TT |
10596 | type_unit_group_unshareable *tug_unshare |
10597 | = per_objfile->get_type_unit_group_unshareable (tu_group); | |
10598 | first_time = tug_unshare->compunit_symtab == NULL; | |
f4dc4d17 DE |
10599 | |
10600 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10601 | debug info. */ | |
fff8551c | 10602 | line_header_up lh; |
d4df075e | 10603 | if (attr != NULL && attr->form_is_unsigned ()) |
3019eac3 | 10604 | { |
d4df075e | 10605 | sect_offset line_offset = (sect_offset) attr->as_unsigned (); |
c24bdb02 | 10606 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10607 | } |
10608 | if (lh == NULL) | |
10609 | { | |
10610 | if (first_time) | |
c24bdb02 | 10611 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10612 | else |
10613 | { | |
8adb8487 | 10614 | gdb_assert (tug_unshare->symtabs == NULL); |
c24bdb02 | 10615 | gdb_assert (m_builder == nullptr); |
8adb8487 | 10616 | struct compunit_symtab *cust = tug_unshare->compunit_symtab; |
c24bdb02 KS |
10617 | m_builder.reset (new struct buildsym_compunit |
10618 | (COMPUNIT_OBJFILE (cust), "", | |
10619 | COMPUNIT_DIRNAME (cust), | |
10620 | compunit_language (cust), | |
10621 | 0, cust)); | |
770479f2 | 10622 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 10623 | } |
f4dc4d17 | 10624 | return; |
3019eac3 DE |
10625 | } |
10626 | ||
c24bdb02 KS |
10627 | line_header = lh.release (); |
10628 | line_header_die_owner = die; | |
3019eac3 | 10629 | |
f4dc4d17 DE |
10630 | if (first_time) |
10631 | { | |
c24bdb02 | 10632 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10633 | |
1fd60fc0 DE |
10634 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10635 | still initializing it, and our caller (a few levels up) | |
10636 | process_full_type_unit still needs to know if this is the first | |
10637 | time. */ | |
10638 | ||
8adb8487 | 10639 | tug_unshare->symtabs |
4ac93832 TT |
10640 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, |
10641 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10642 | |
7ba99d21 AT |
10643 | auto &file_names = line_header->file_names (); |
10644 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10645 | { |
7ba99d21 | 10646 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10647 | dwarf2_start_subfile (this, fe.name, |
10648 | fe.include_dir (line_header)); | |
10649 | buildsym_compunit *b = get_builder (); | |
10650 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10651 | { |
4c8aa72d PA |
10652 | /* NOTE: start_subfile will recognize when it's been |
10653 | passed a file it has already seen. So we can't | |
10654 | assume there's a simple mapping from | |
10655 | cu->line_header->file_names to subfiles, plus | |
10656 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
10657 | b->get_current_subfile ()->symtab |
10658 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
10659 | } |
10660 | ||
c24bdb02 | 10661 | fe.symtab = b->get_current_subfile ()->symtab; |
8adb8487 | 10662 | tug_unshare->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
10663 | } |
10664 | } | |
10665 | else | |
3019eac3 | 10666 | { |
c24bdb02 | 10667 | gdb_assert (m_builder == nullptr); |
8adb8487 | 10668 | struct compunit_symtab *cust = tug_unshare->compunit_symtab; |
c24bdb02 KS |
10669 | m_builder.reset (new struct buildsym_compunit |
10670 | (COMPUNIT_OBJFILE (cust), "", | |
10671 | COMPUNIT_DIRNAME (cust), | |
10672 | compunit_language (cust), | |
10673 | 0, cust)); | |
770479f2 | 10674 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 10675 | |
7ba99d21 AT |
10676 | auto &file_names = line_header->file_names (); |
10677 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10678 | { |
7ba99d21 | 10679 | file_entry &fe = file_names[i]; |
8adb8487 | 10680 | fe.symtab = tug_unshare->symtabs[i]; |
f4dc4d17 | 10681 | } |
3019eac3 DE |
10682 | } |
10683 | ||
f4dc4d17 DE |
10684 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10685 | so they don't have a "real" (so to speak) symtab anyway. | |
10686 | There is later code that will assign the main symtab to all symbols | |
10687 | that don't have one. We need to handle the case of a symbol with a | |
10688 | missing symtab (DW_AT_decl_file) anyway. */ | |
10689 | } | |
3019eac3 | 10690 | |
f4dc4d17 DE |
10691 | /* Process DW_TAG_type_unit. |
10692 | For TUs we want to skip the first top level sibling if it's not the | |
10693 | actual type being defined by this TU. In this case the first top | |
10694 | level sibling is there to provide context only. */ | |
3019eac3 | 10695 | |
f4dc4d17 DE |
10696 | static void |
10697 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10698 | { | |
10699 | struct die_info *child_die; | |
3019eac3 | 10700 | |
f4dc4d17 DE |
10701 | prepare_one_comp_unit (cu, die, language_minimal); |
10702 | ||
10703 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10704 | We do this before processing child DIEs, so that the line header table | |
10705 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 10706 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
10707 | |
10708 | if (die->child != NULL) | |
10709 | { | |
10710 | child_die = die->child; | |
10711 | while (child_die && child_die->tag) | |
10712 | { | |
10713 | process_die (child_die, cu); | |
436c571c | 10714 | child_die = child_die->sibling; |
f4dc4d17 DE |
10715 | } |
10716 | } | |
3019eac3 DE |
10717 | } |
10718 | \f | |
80626a55 DE |
10719 | /* DWO/DWP files. |
10720 | ||
10721 | http://gcc.gnu.org/wiki/DebugFission | |
10722 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10723 | ||
10724 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10725 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10726 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10727 | |
10728 | static hashval_t | |
10729 | hash_dwo_file (const void *item) | |
10730 | { | |
9a3c8263 | 10731 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10732 | hashval_t hash; |
3019eac3 | 10733 | |
a2ce51a0 DE |
10734 | hash = htab_hash_string (dwo_file->dwo_name); |
10735 | if (dwo_file->comp_dir != NULL) | |
10736 | hash += htab_hash_string (dwo_file->comp_dir); | |
10737 | return hash; | |
3019eac3 DE |
10738 | } |
10739 | ||
10740 | static int | |
10741 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10742 | { | |
9a3c8263 SM |
10743 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10744 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10745 | |
a2ce51a0 DE |
10746 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10747 | return 0; | |
10748 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10749 | return lhs->comp_dir == rhs->comp_dir; | |
10750 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10751 | } |
10752 | ||
10753 | /* Allocate a hash table for DWO files. */ | |
10754 | ||
51ac9db5 | 10755 | static htab_up |
298e9637 | 10756 | allocate_dwo_file_hash_table () |
3019eac3 | 10757 | { |
bc68fb19 TT |
10758 | return htab_up (htab_create_alloc (41, |
10759 | hash_dwo_file, | |
10760 | eq_dwo_file, | |
ef5f598c | 10761 | htab_delete_entry<dwo_file>, |
bc68fb19 | 10762 | xcalloc, xfree)); |
3019eac3 DE |
10763 | } |
10764 | ||
80626a55 DE |
10765 | /* Lookup DWO file DWO_NAME. */ |
10766 | ||
10767 | static void ** | |
976ca316 | 10768 | lookup_dwo_file_slot (dwarf2_per_objfile *per_objfile, |
ed2dc618 SM |
10769 | const char *dwo_name, |
10770 | const char *comp_dir) | |
80626a55 DE |
10771 | { |
10772 | struct dwo_file find_entry; | |
10773 | void **slot; | |
10774 | ||
976ca316 SM |
10775 | if (per_objfile->per_bfd->dwo_files == NULL) |
10776 | per_objfile->per_bfd->dwo_files = allocate_dwo_file_hash_table (); | |
80626a55 | 10777 | |
0ac5b59e DE |
10778 | find_entry.dwo_name = dwo_name; |
10779 | find_entry.comp_dir = comp_dir; | |
976ca316 | 10780 | slot = htab_find_slot (per_objfile->per_bfd->dwo_files.get (), &find_entry, |
51ac9db5 | 10781 | INSERT); |
80626a55 DE |
10782 | |
10783 | return slot; | |
10784 | } | |
10785 | ||
3019eac3 DE |
10786 | static hashval_t |
10787 | hash_dwo_unit (const void *item) | |
10788 | { | |
9a3c8263 | 10789 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10790 | |
10791 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10792 | return dwo_unit->signature; | |
10793 | } | |
10794 | ||
10795 | static int | |
10796 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10797 | { | |
9a3c8263 SM |
10798 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10799 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10800 | |
10801 | /* The signature is assumed to be unique within the DWO file. | |
10802 | So while object file CU dwo_id's always have the value zero, | |
10803 | that's OK, assuming each object file DWO file has only one CU, | |
10804 | and that's the rule for now. */ | |
10805 | return lhs->signature == rhs->signature; | |
10806 | } | |
10807 | ||
10808 | /* Allocate a hash table for DWO CUs,TUs. | |
10809 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10810 | ||
b0b6a987 | 10811 | static htab_up |
298e9637 | 10812 | allocate_dwo_unit_table () |
3019eac3 DE |
10813 | { |
10814 | /* Start out with a pretty small number. | |
10815 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
10816 | return htab_up (htab_create_alloc (3, |
10817 | hash_dwo_unit, | |
10818 | eq_dwo_unit, | |
10819 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
10820 | } |
10821 | ||
19c3d4c9 | 10822 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10823 | |
10824 | static void | |
19c3d4c9 DE |
10825 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10826 | const gdb_byte *info_ptr, | |
10827 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
10828 | struct dwo_file *dwo_file, |
10829 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
10830 | { |
10831 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10832 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10833 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 10834 | |
a084a2a6 AT |
10835 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
10836 | if (!signature.has_value ()) | |
3019eac3 | 10837 | { |
b98664d3 | 10838 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 10839 | " its dwo_id [in module %s]"), |
9d8780f0 | 10840 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10841 | return; |
10842 | } | |
10843 | ||
3019eac3 | 10844 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 10845 | dwo_unit->signature = *signature; |
8a0459fd | 10846 | dwo_unit->section = section; |
9c541725 | 10847 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10848 | dwo_unit->length = cu->per_cu->length; |
10849 | ||
6f738b01 SM |
10850 | dwarf_read_debug_printf (" offset %s, dwo_id %s", |
10851 | sect_offset_str (sect_off), | |
10852 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10853 | } |
10854 | ||
33c5cd75 | 10855 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10856 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10857 | |
33c5cd75 | 10858 | static void |
976ca316 | 10859 | create_cus_hash_table (dwarf2_per_objfile *per_objfile, |
18a8505e | 10860 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 10861 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 | 10862 | { |
976ca316 SM |
10863 | struct objfile *objfile = per_objfile->objfile; |
10864 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
d521ce57 | 10865 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10866 | |
96b79293 | 10867 | section.read (objfile); |
33c5cd75 | 10868 | info_ptr = section.buffer; |
3019eac3 DE |
10869 | |
10870 | if (info_ptr == NULL) | |
33c5cd75 | 10871 | return; |
3019eac3 | 10872 | |
6f738b01 SM |
10873 | dwarf_read_debug_printf ("Reading %s for %s:", |
10874 | section.get_name (), | |
10875 | section.get_file_name ()); | |
3019eac3 | 10876 | |
33c5cd75 | 10877 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10878 | while (info_ptr < end_ptr) |
10879 | { | |
10880 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 10881 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
10882 | struct dwo_unit *dwo_unit; |
10883 | void **slot; | |
10884 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10885 | |
1859c670 | 10886 | per_cu.per_bfd = per_bfd; |
3019eac3 | 10887 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
10888 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10889 | per_cu.section = §ion; | |
10890 | ||
976ca316 | 10891 | cutu_reader reader (&per_cu, per_objfile, cu, &dwo_file); |
c0ab21c2 TT |
10892 | if (!reader.dummy_p) |
10893 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 10894 | &dwo_file, &read_unit); |
33c5cd75 DB |
10895 | info_ptr += per_cu.length; |
10896 | ||
10897 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 10898 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 10899 | continue; |
3019eac3 | 10900 | |
33c5cd75 | 10901 | if (cus_htab == NULL) |
298e9637 | 10902 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 10903 | |
1859c670 | 10904 | dwo_unit = OBSTACK_ZALLOC (&per_bfd->obstack, |
45940949 | 10905 | struct dwo_unit); |
c0ab21c2 | 10906 | *dwo_unit = read_unit; |
b0b6a987 | 10907 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
10908 | gdb_assert (slot != NULL); |
10909 | if (*slot != NULL) | |
19c3d4c9 | 10910 | { |
33c5cd75 DB |
10911 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10912 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10913 | |
b98664d3 | 10914 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
10915 | " the entry at offset %s, signature %s"), |
10916 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 10917 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 10918 | } |
33c5cd75 | 10919 | *slot = (void *)dwo_unit; |
3019eac3 | 10920 | } |
3019eac3 DE |
10921 | } |
10922 | ||
80626a55 DE |
10923 | /* DWP file .debug_{cu,tu}_index section format: |
10924 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
d2854d8d CT |
10925 | [ref: http://dwarfstd.org/doc/DWARF5.pdf, sect 7.3.5 "DWARF Package Files"] |
10926 | ||
10927 | DWP Versions 1 & 2 are older, pre-standard format versions. The first | |
10928 | officially standard DWP format was published with DWARF v5 and is called | |
10929 | Version 5. There are no versions 3 or 4. | |
80626a55 | 10930 | |
d2415c6c DE |
10931 | DWP Version 1: |
10932 | ||
80626a55 DE |
10933 | Both index sections have the same format, and serve to map a 64-bit |
10934 | signature to a set of section numbers. Each section begins with a header, | |
10935 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10936 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10937 | aligned at 8-byte boundaries in the file. | |
10938 | ||
d2415c6c DE |
10939 | The index section header consists of: |
10940 | ||
10941 | V, 32 bit version number | |
10942 | -, 32 bits unused | |
10943 | N, 32 bit number of compilation units or type units in the index | |
10944 | M, 32 bit number of slots in the hash table | |
80626a55 | 10945 | |
d2415c6c | 10946 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10947 | |
d2415c6c DE |
10948 | The hash table begins at offset 16 in the section, and consists of an array |
10949 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10950 | order of the application binary). Unused slots in the hash table are 0. | |
10951 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10952 | |
d2415c6c DE |
10953 | The parallel table begins immediately after the hash table |
10954 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10955 | array of 32-bit indexes (using the byte order of the application binary), | |
10956 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10957 | table contains a 32-bit index into the pool of section numbers. For unused | |
10958 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10959 | |
73869dc2 DE |
10960 | The pool of section numbers begins immediately following the hash table |
10961 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10962 | section numbers consists of an array of 32-bit words (using the byte order | |
10963 | of the application binary). Each item in the array is indexed starting | |
10964 | from 0. The hash table entry provides the index of the first section | |
10965 | number in the set. Additional section numbers in the set follow, and the | |
10966 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10967 | ||
10968 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10969 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10970 | be the second entry. Other members of the set may follow in any order. | |
10971 | ||
10972 | --- | |
10973 | ||
d2854d8d | 10974 | DWP Versions 2 and 5: |
73869dc2 | 10975 | |
d2854d8d | 10976 | DWP Versions 2 and 5 combine all the .debug_info, etc. sections into one, |
73869dc2 DE |
10977 | and the entries in the index tables are now offsets into these sections. |
10978 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10979 | section. | |
10980 | ||
10981 | Index Section Contents: | |
10982 | Header | |
10983 | Hash Table of Signatures dwp_hash_table.hash_table | |
10984 | Parallel Table of Indices dwp_hash_table.unit_table | |
d2854d8d CT |
10985 | Table of Section Offsets dwp_hash_table.{v2|v5}.{section_ids,offsets} |
10986 | Table of Section Sizes dwp_hash_table.{v2|v5}.sizes | |
73869dc2 DE |
10987 | |
10988 | The index section header consists of: | |
10989 | ||
10990 | V, 32 bit version number | |
10991 | L, 32 bit number of columns in the table of section offsets | |
10992 | N, 32 bit number of compilation units or type units in the index | |
10993 | M, 32 bit number of slots in the hash table | |
10994 | ||
10995 | Numbers are recorded using the byte order of the application binary. | |
10996 | ||
10997 | The hash table has the same format as version 1. | |
10998 | The parallel table of indices has the same format as version 1, | |
10999 | except that the entries are origin-1 indices into the table of sections | |
11000 | offsets and the table of section sizes. | |
11001 | ||
11002 | The table of offsets begins immediately following the parallel table | |
11003 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11004 | a two-dimensional array of 32-bit words (using the byte order of the | |
11005 | application binary), with L columns and N+1 rows, in row-major order. | |
11006 | Each row in the array is indexed starting from 0. The first row provides | |
11007 | a key to the remaining rows: each column in this row provides an identifier | |
11008 | for a debug section, and the offsets in the same column of subsequent rows | |
d2854d8d | 11009 | refer to that section. The section identifiers for Version 2 are: |
73869dc2 DE |
11010 | |
11011 | DW_SECT_INFO 1 .debug_info.dwo | |
11012 | DW_SECT_TYPES 2 .debug_types.dwo | |
11013 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11014 | DW_SECT_LINE 4 .debug_line.dwo | |
11015 | DW_SECT_LOC 5 .debug_loc.dwo | |
11016 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11017 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11018 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11019 | ||
d2854d8d CT |
11020 | The section identifiers for Version 5 are: |
11021 | ||
11022 | DW_SECT_INFO_V5 1 .debug_info.dwo | |
11023 | DW_SECT_RESERVED_V5 2 -- | |
11024 | DW_SECT_ABBREV_V5 3 .debug_abbrev.dwo | |
11025 | DW_SECT_LINE_V5 4 .debug_line.dwo | |
11026 | DW_SECT_LOCLISTS_V5 5 .debug_loclists.dwo | |
11027 | DW_SECT_STR_OFFSETS_V5 6 .debug_str_offsets.dwo | |
11028 | DW_SECT_MACRO_V5 7 .debug_macro.dwo | |
11029 | DW_SECT_RNGLISTS_V5 8 .debug_rnglists.dwo | |
11030 | ||
73869dc2 DE |
11031 | The offsets provided by the CU and TU index sections are the base offsets |
11032 | for the contributions made by each CU or TU to the corresponding section | |
11033 | in the package file. Each CU and TU header contains an abbrev_offset | |
11034 | field, used to find the abbreviations table for that CU or TU within the | |
11035 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11036 | be interpreted as relative to the base offset given in the index section. | |
11037 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11038 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11039 | and offsets into other debug sections obtained from DWARF attributes should | |
11040 | also be interpreted as relative to the corresponding base offset. | |
11041 | ||
11042 | The table of sizes begins immediately following the table of offsets. | |
11043 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11044 | with L columns and N rows, in row-major order. Each row in the array is | |
11045 | indexed starting from 1 (row 0 is shared by the two tables). | |
11046 | ||
11047 | --- | |
11048 | ||
11049 | Hash table lookup is handled the same in version 1 and 2: | |
11050 | ||
11051 | We assume that N and M will not exceed 2^32 - 1. | |
11052 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11053 | ||
d2415c6c DE |
11054 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11055 | in the hash table is located as follows: | |
80626a55 | 11056 | |
d2415c6c DE |
11057 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11058 | the low-order k bits all set to 1. | |
80626a55 | 11059 | |
d2415c6c | 11060 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11061 | |
d2415c6c DE |
11062 | 3) If the hash table entry at index H matches the signature, use that |
11063 | entry. If the hash table entry at index H is unused (all zeroes), | |
11064 | terminate the search: the signature is not present in the table. | |
80626a55 | 11065 | |
d2415c6c | 11066 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11067 | |
d2415c6c | 11068 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11069 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11070 | |
11071 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11072 | .debug_{info,types}.dwo in DWP_FILE. | |
11073 | Returns NULL if there isn't one. | |
11074 | Note: This function processes DWP files only, not DWO files. */ | |
11075 | ||
11076 | static struct dwp_hash_table * | |
976ca316 | 11077 | create_dwp_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11078 | struct dwp_file *dwp_file, int is_debug_types) |
80626a55 | 11079 | { |
976ca316 | 11080 | struct objfile *objfile = per_objfile->objfile; |
400174b1 | 11081 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11082 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11083 | struct dwarf2_section_info *index; |
73869dc2 | 11084 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11085 | struct dwp_hash_table *htab; |
11086 | ||
11087 | if (is_debug_types) | |
11088 | index = &dwp_file->sections.tu_index; | |
11089 | else | |
11090 | index = &dwp_file->sections.cu_index; | |
11091 | ||
96b79293 | 11092 | if (index->empty ()) |
80626a55 | 11093 | return NULL; |
96b79293 | 11094 | index->read (objfile); |
80626a55 DE |
11095 | |
11096 | index_ptr = index->buffer; | |
11097 | index_end = index_ptr + index->size; | |
11098 | ||
d2854d8d CT |
11099 | /* For Version 5, the version is really 2 bytes of data & 2 bytes of padding. |
11100 | For now it's safe to just read 4 bytes (particularly as it's difficult to | |
11101 | tell if you're dealing with Version 5 before you've read the version). */ | |
80626a55 | 11102 | version = read_4_bytes (dbfd, index_ptr); |
73869dc2 | 11103 | index_ptr += 4; |
d2854d8d | 11104 | if (version == 2 || version == 5) |
73869dc2 DE |
11105 | nr_columns = read_4_bytes (dbfd, index_ptr); |
11106 | else | |
11107 | nr_columns = 0; | |
11108 | index_ptr += 4; | |
80626a55 DE |
11109 | nr_units = read_4_bytes (dbfd, index_ptr); |
11110 | index_ptr += 4; | |
11111 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11112 | index_ptr += 4; | |
11113 | ||
d2854d8d | 11114 | if (version != 1 && version != 2 && version != 5) |
80626a55 | 11115 | { |
21aa081e | 11116 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11117 | " [in module %s]"), |
21aa081e | 11118 | pulongest (version), dwp_file->name); |
80626a55 DE |
11119 | } |
11120 | if (nr_slots != (nr_slots & -nr_slots)) | |
11121 | { | |
21aa081e | 11122 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11123 | " is not power of 2 [in module %s]"), |
21aa081e | 11124 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11125 | } |
11126 | ||
976ca316 | 11127 | htab = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwp_hash_table); |
73869dc2 DE |
11128 | htab->version = version; |
11129 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11130 | htab->nr_units = nr_units; |
11131 | htab->nr_slots = nr_slots; | |
11132 | htab->hash_table = index_ptr; | |
11133 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11134 | |
11135 | /* Exit early if the table is empty. */ | |
11136 | if (nr_slots == 0 || nr_units == 0 | |
d2854d8d CT |
11137 | || (version == 2 && nr_columns == 0) |
11138 | || (version == 5 && nr_columns == 0)) | |
73869dc2 DE |
11139 | { |
11140 | /* All must be zero. */ | |
11141 | if (nr_slots != 0 || nr_units != 0 | |
d2854d8d CT |
11142 | || (version == 2 && nr_columns != 0) |
11143 | || (version == 5 && nr_columns != 0)) | |
73869dc2 | 11144 | { |
b98664d3 | 11145 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11146 | " all zero [in modules %s]"), |
11147 | dwp_file->name); | |
11148 | } | |
11149 | return htab; | |
11150 | } | |
11151 | ||
11152 | if (version == 1) | |
11153 | { | |
11154 | htab->section_pool.v1.indices = | |
11155 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11156 | /* It's harder to decide whether the section is too small in v1. | |
11157 | V1 is deprecated anyway so we punt. */ | |
11158 | } | |
d2854d8d | 11159 | else if (version == 2) |
73869dc2 DE |
11160 | { |
11161 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11162 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11163 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11164 | /* Reverse map for error checking. */ |
11165 | int ids_seen[DW_SECT_MAX + 1]; | |
11166 | int i; | |
11167 | ||
11168 | if (nr_columns < 2) | |
11169 | { | |
11170 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11171 | " in section table [in module %s]"), | |
11172 | dwp_file->name); | |
11173 | } | |
11174 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11175 | { | |
11176 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11177 | " in section table [in module %s]"), | |
11178 | dwp_file->name); | |
11179 | } | |
04fd5eed GB |
11180 | memset (ids, 255, sizeof_ids); |
11181 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11182 | for (i = 0; i < nr_columns; ++i) |
11183 | { | |
11184 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11185 | ||
11186 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11187 | { | |
11188 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11189 | " in section table [in module %s]"), | |
11190 | id, dwp_file->name); | |
11191 | } | |
11192 | if (ids_seen[id] != -1) | |
11193 | { | |
11194 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11195 | " id %d in section table [in module %s]"), | |
11196 | id, dwp_file->name); | |
11197 | } | |
11198 | ids_seen[id] = i; | |
11199 | ids[i] = id; | |
11200 | } | |
11201 | /* Must have exactly one info or types section. */ | |
11202 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11203 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11204 | != 1) | |
11205 | { | |
11206 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11207 | " DWO info/types section [in module %s]"), | |
11208 | dwp_file->name); | |
11209 | } | |
11210 | /* Must have an abbrev section. */ | |
11211 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11212 | { | |
11213 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11214 | " section [in module %s]"), | |
11215 | dwp_file->name); | |
11216 | } | |
11217 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11218 | htab->section_pool.v2.sizes = | |
11219 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11220 | * nr_units * nr_columns); | |
11221 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11222 | * nr_units * nr_columns)) | |
11223 | > index_end) | |
11224 | { | |
11225 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11226 | " [in module %s]"), | |
11227 | dwp_file->name); | |
11228 | } | |
11229 | } | |
d2854d8d CT |
11230 | else /* version == 5 */ |
11231 | { | |
11232 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11233 | int *ids = htab->section_pool.v5.section_ids; | |
11234 | size_t sizeof_ids = sizeof (htab->section_pool.v5.section_ids); | |
11235 | /* Reverse map for error checking. */ | |
11236 | int ids_seen[DW_SECT_MAX_V5 + 1]; | |
11237 | ||
11238 | if (nr_columns < 2) | |
11239 | { | |
11240 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11241 | " in section table [in module %s]"), | |
11242 | dwp_file->name); | |
11243 | } | |
11244 | if (nr_columns > MAX_NR_V5_DWO_SECTIONS) | |
11245 | { | |
11246 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11247 | " in section table [in module %s]"), | |
11248 | dwp_file->name); | |
11249 | } | |
11250 | memset (ids, 255, sizeof_ids); | |
11251 | memset (ids_seen, 255, sizeof (ids_seen)); | |
11252 | for (int i = 0; i < nr_columns; ++i) | |
11253 | { | |
11254 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11255 | ||
11256 | if (id < DW_SECT_MIN || id > DW_SECT_MAX_V5) | |
11257 | { | |
11258 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11259 | " in section table [in module %s]"), | |
11260 | id, dwp_file->name); | |
11261 | } | |
11262 | if (ids_seen[id] != -1) | |
11263 | { | |
11264 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11265 | " id %d in section table [in module %s]"), | |
11266 | id, dwp_file->name); | |
11267 | } | |
11268 | ids_seen[id] = i; | |
11269 | ids[i] = id; | |
11270 | } | |
11271 | /* Must have seen an info section. */ | |
11272 | if (ids_seen[DW_SECT_INFO_V5] == -1) | |
11273 | { | |
11274 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11275 | " DWO info/types section [in module %s]"), | |
11276 | dwp_file->name); | |
11277 | } | |
11278 | /* Must have an abbrev section. */ | |
11279 | if (ids_seen[DW_SECT_ABBREV_V5] == -1) | |
11280 | { | |
11281 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11282 | " section [in module %s]"), | |
11283 | dwp_file->name); | |
11284 | } | |
11285 | htab->section_pool.v5.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11286 | htab->section_pool.v5.sizes | |
11287 | = htab->section_pool.v5.offsets + (sizeof (uint32_t) | |
11288 | * nr_units * nr_columns); | |
11289 | if ((htab->section_pool.v5.sizes + (sizeof (uint32_t) | |
11290 | * nr_units * nr_columns)) | |
11291 | > index_end) | |
11292 | { | |
11293 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11294 | " [in module %s]"), | |
11295 | dwp_file->name); | |
11296 | } | |
11297 | } | |
80626a55 DE |
11298 | |
11299 | return htab; | |
11300 | } | |
11301 | ||
11302 | /* Update SECTIONS with the data from SECTP. | |
11303 | ||
5bb6e9dd TT |
11304 | This function is like the other "locate" section routines, but in |
11305 | this context the sections to read comes from the DWP V1 hash table, | |
11306 | not the full ELF section table. | |
80626a55 DE |
11307 | |
11308 | The result is non-zero for success, or zero if an error was found. */ | |
11309 | ||
11310 | static int | |
73869dc2 DE |
11311 | locate_v1_virtual_dwo_sections (asection *sectp, |
11312 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11313 | { |
11314 | const struct dwop_section_names *names = &dwop_section_names; | |
11315 | ||
fbedd546 | 11316 | if (names->abbrev_dwo.matches (sectp->name)) |
80626a55 DE |
11317 | { |
11318 | /* There can be only one. */ | |
049412e3 | 11319 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11320 | return 0; |
049412e3 | 11321 | sections->abbrev.s.section = sectp; |
fd361982 | 11322 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 | 11323 | } |
fbedd546 TT |
11324 | else if (names->info_dwo.matches (sectp->name) |
11325 | || names->types_dwo.matches (sectp->name)) | |
80626a55 DE |
11326 | { |
11327 | /* There can be only one. */ | |
049412e3 | 11328 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11329 | return 0; |
049412e3 | 11330 | sections->info_or_types.s.section = sectp; |
fd361982 | 11331 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 | 11332 | } |
fbedd546 | 11333 | else if (names->line_dwo.matches (sectp->name)) |
80626a55 DE |
11334 | { |
11335 | /* There can be only one. */ | |
049412e3 | 11336 | if (sections->line.s.section != NULL) |
80626a55 | 11337 | return 0; |
049412e3 | 11338 | sections->line.s.section = sectp; |
fd361982 | 11339 | sections->line.size = bfd_section_size (sectp); |
80626a55 | 11340 | } |
fbedd546 | 11341 | else if (names->loc_dwo.matches (sectp->name)) |
80626a55 DE |
11342 | { |
11343 | /* There can be only one. */ | |
049412e3 | 11344 | if (sections->loc.s.section != NULL) |
80626a55 | 11345 | return 0; |
049412e3 | 11346 | sections->loc.s.section = sectp; |
fd361982 | 11347 | sections->loc.size = bfd_section_size (sectp); |
80626a55 | 11348 | } |
fbedd546 | 11349 | else if (names->macinfo_dwo.matches (sectp->name)) |
80626a55 DE |
11350 | { |
11351 | /* There can be only one. */ | |
049412e3 | 11352 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11353 | return 0; |
049412e3 | 11354 | sections->macinfo.s.section = sectp; |
fd361982 | 11355 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 | 11356 | } |
fbedd546 | 11357 | else if (names->macro_dwo.matches (sectp->name)) |
80626a55 DE |
11358 | { |
11359 | /* There can be only one. */ | |
049412e3 | 11360 | if (sections->macro.s.section != NULL) |
80626a55 | 11361 | return 0; |
049412e3 | 11362 | sections->macro.s.section = sectp; |
fd361982 | 11363 | sections->macro.size = bfd_section_size (sectp); |
80626a55 | 11364 | } |
fbedd546 | 11365 | else if (names->str_offsets_dwo.matches (sectp->name)) |
80626a55 DE |
11366 | { |
11367 | /* There can be only one. */ | |
049412e3 | 11368 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11369 | return 0; |
049412e3 | 11370 | sections->str_offsets.s.section = sectp; |
fd361982 | 11371 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11372 | } |
11373 | else | |
11374 | { | |
11375 | /* No other kind of section is valid. */ | |
11376 | return 0; | |
11377 | } | |
11378 | ||
11379 | return 1; | |
11380 | } | |
11381 | ||
73869dc2 DE |
11382 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11383 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11384 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11385 | This is for DWP version 1 files. */ | |
80626a55 DE |
11386 | |
11387 | static struct dwo_unit * | |
976ca316 | 11388 | create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11389 | struct dwp_file *dwp_file, |
73869dc2 DE |
11390 | uint32_t unit_index, |
11391 | const char *comp_dir, | |
11392 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11393 | { |
73869dc2 DE |
11394 | const struct dwp_hash_table *dwp_htab = |
11395 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11396 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11397 | const char *kind = is_debug_types ? "TU" : "CU"; |
11398 | struct dwo_file *dwo_file; | |
11399 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11400 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11401 | void **dwo_file_slot; |
80626a55 DE |
11402 | int i; |
11403 | ||
73869dc2 DE |
11404 | gdb_assert (dwp_file->version == 1); |
11405 | ||
6f738b01 SM |
11406 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V1 file: %s", |
11407 | kind, pulongest (unit_index), hex_string (signature), | |
11408 | dwp_file->name); | |
80626a55 | 11409 | |
19ac8c2e | 11410 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11411 | Put a limit on the number of sections we look for so that bad data |
11412 | doesn't cause us to loop forever. */ | |
11413 | ||
73869dc2 | 11414 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11415 | (1 /* .debug_info or .debug_types */ \ |
11416 | + 1 /* .debug_abbrev */ \ | |
11417 | + 1 /* .debug_line */ \ | |
11418 | + 1 /* .debug_loc */ \ | |
11419 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11420 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11421 | + 1 /* trailing zero */) |
11422 | ||
11423 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11424 | |
73869dc2 | 11425 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11426 | { |
11427 | asection *sectp; | |
11428 | uint32_t section_nr = | |
11429 | read_4_bytes (dbfd, | |
73869dc2 DE |
11430 | dwp_htab->section_pool.v1.indices |
11431 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11432 | |
11433 | if (section_nr == 0) | |
11434 | break; | |
11435 | if (section_nr >= dwp_file->num_sections) | |
11436 | { | |
11437 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11438 | " [in module %s]"), | |
11439 | dwp_file->name); | |
11440 | } | |
11441 | ||
11442 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11443 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11444 | { |
11445 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11446 | " [in module %s]"), | |
11447 | dwp_file->name); | |
11448 | } | |
11449 | } | |
11450 | ||
11451 | if (i < 2 | |
96b79293 TT |
11452 | || sections.info_or_types.empty () |
11453 | || sections.abbrev.empty ()) | |
80626a55 DE |
11454 | { |
11455 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11456 | " [in module %s]"), | |
11457 | dwp_file->name); | |
11458 | } | |
73869dc2 | 11459 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11460 | { |
11461 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11462 | " [in module %s]"), | |
11463 | dwp_file->name); | |
11464 | } | |
11465 | ||
11466 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11467 | have dwo_unit "live" in that. At least for now. | |
11468 | ||
11469 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11470 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11471 | file, we can combine them back into a virtual DWO file to save space |
11472 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11473 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11474 | ||
791afaa2 TT |
11475 | std::string virtual_dwo_name = |
11476 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11477 | sections.abbrev.get_id (), |
11478 | sections.line.get_id (), | |
11479 | sections.loc.get_id (), | |
11480 | sections.str_offsets.get_id ()); | |
80626a55 | 11481 | /* Can we use an existing virtual DWO file? */ |
976ca316 | 11482 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, virtual_dwo_name.c_str (), |
ed2dc618 | 11483 | comp_dir); |
80626a55 DE |
11484 | /* Create one if necessary. */ |
11485 | if (*dwo_file_slot == NULL) | |
11486 | { | |
6f738b01 SM |
11487 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11488 | virtual_dwo_name.c_str ()); | |
11489 | ||
51ac9db5 | 11490 | dwo_file = new struct dwo_file; |
976ca316 | 11491 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); |
0ac5b59e | 11492 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11493 | dwo_file->sections.abbrev = sections.abbrev; |
11494 | dwo_file->sections.line = sections.line; | |
11495 | dwo_file->sections.loc = sections.loc; | |
11496 | dwo_file->sections.macinfo = sections.macinfo; | |
11497 | dwo_file->sections.macro = sections.macro; | |
11498 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11499 | /* The "str" section is global to the entire DWP file. */ | |
11500 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11501 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11502 | there's no need to record it in dwo_file. |
11503 | Also, we can't simply record type sections in dwo_file because | |
11504 | we record a pointer into the vector in dwo_unit. As we collect more | |
11505 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11506 | for it, invalidating all copies of pointers into the previous |
11507 | contents. */ | |
80626a55 DE |
11508 | *dwo_file_slot = dwo_file; |
11509 | } | |
11510 | else | |
11511 | { | |
6f738b01 SM |
11512 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11513 | virtual_dwo_name.c_str ()); | |
11514 | ||
9a3c8263 | 11515 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11516 | } |
80626a55 | 11517 | |
976ca316 | 11518 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); |
80626a55 DE |
11519 | dwo_unit->dwo_file = dwo_file; |
11520 | dwo_unit->signature = signature; | |
8d749320 | 11521 | dwo_unit->section = |
976ca316 | 11522 | XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); |
8a0459fd | 11523 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11524 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11525 | |
11526 | return dwo_unit; | |
11527 | } | |
11528 | ||
d2854d8d CT |
11529 | /* Subroutine of create_dwo_unit_in_dwp_v2 and create_dwo_unit_in_dwp_v5 to |
11530 | simplify them. Given a pointer to the containing section SECTION, and | |
11531 | OFFSET,SIZE of the piece within that section used by a TU/CU, return a | |
11532 | virtual section of just that piece. */ | |
73869dc2 DE |
11533 | |
11534 | static struct dwarf2_section_info | |
d2854d8d CT |
11535 | create_dwp_v2_or_v5_section (dwarf2_per_objfile *per_objfile, |
11536 | struct dwarf2_section_info *section, | |
11537 | bfd_size_type offset, bfd_size_type size) | |
73869dc2 DE |
11538 | { |
11539 | struct dwarf2_section_info result; | |
11540 | asection *sectp; | |
11541 | ||
11542 | gdb_assert (section != NULL); | |
11543 | gdb_assert (!section->is_virtual); | |
11544 | ||
11545 | memset (&result, 0, sizeof (result)); | |
11546 | result.s.containing_section = section; | |
dc4ccb6f | 11547 | result.is_virtual = true; |
73869dc2 DE |
11548 | |
11549 | if (size == 0) | |
11550 | return result; | |
11551 | ||
96b79293 | 11552 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11553 | |
11554 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11555 | bounds of the real section. This is a pretty-rare event, so just | |
11556 | flag an error (easier) instead of a warning and trying to cope. */ | |
11557 | if (sectp == NULL | |
fd361982 | 11558 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11559 | { |
d2854d8d | 11560 | error (_("Dwarf Error: Bad DWP V2 or V5 section info, doesn't fit" |
73869dc2 | 11561 | " in section %s [in module %s]"), |
fd361982 | 11562 | sectp ? bfd_section_name (sectp) : "<unknown>", |
976ca316 | 11563 | objfile_name (per_objfile->objfile)); |
73869dc2 DE |
11564 | } |
11565 | ||
11566 | result.virtual_offset = offset; | |
11567 | result.size = size; | |
11568 | return result; | |
11569 | } | |
11570 | ||
11571 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11572 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11573 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11574 | This is for DWP version 2 files. */ | |
11575 | ||
11576 | static struct dwo_unit * | |
976ca316 | 11577 | create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11578 | struct dwp_file *dwp_file, |
73869dc2 DE |
11579 | uint32_t unit_index, |
11580 | const char *comp_dir, | |
11581 | ULONGEST signature, int is_debug_types) | |
11582 | { | |
73869dc2 DE |
11583 | const struct dwp_hash_table *dwp_htab = |
11584 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11585 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11586 | const char *kind = is_debug_types ? "TU" : "CU"; |
11587 | struct dwo_file *dwo_file; | |
11588 | struct dwo_unit *dwo_unit; | |
d2854d8d | 11589 | struct virtual_v2_or_v5_dwo_sections sections; |
73869dc2 | 11590 | void **dwo_file_slot; |
73869dc2 DE |
11591 | int i; |
11592 | ||
11593 | gdb_assert (dwp_file->version == 2); | |
11594 | ||
6f738b01 SM |
11595 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V2 file: %s", |
11596 | kind, pulongest (unit_index), hex_string (signature), | |
11597 | dwp_file->name); | |
73869dc2 DE |
11598 | |
11599 | /* Fetch the section offsets of this DWO unit. */ | |
11600 | ||
11601 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11602 | |
11603 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11604 | { | |
11605 | uint32_t offset = read_4_bytes (dbfd, | |
11606 | dwp_htab->section_pool.v2.offsets | |
11607 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11608 | + i) | |
11609 | * sizeof (uint32_t))); | |
11610 | uint32_t size = read_4_bytes (dbfd, | |
11611 | dwp_htab->section_pool.v2.sizes | |
11612 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11613 | + i) | |
11614 | * sizeof (uint32_t))); | |
11615 | ||
11616 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11617 | { | |
11618 | case DW_SECT_INFO: | |
11619 | case DW_SECT_TYPES: | |
11620 | sections.info_or_types_offset = offset; | |
11621 | sections.info_or_types_size = size; | |
11622 | break; | |
11623 | case DW_SECT_ABBREV: | |
11624 | sections.abbrev_offset = offset; | |
11625 | sections.abbrev_size = size; | |
11626 | break; | |
11627 | case DW_SECT_LINE: | |
11628 | sections.line_offset = offset; | |
11629 | sections.line_size = size; | |
11630 | break; | |
11631 | case DW_SECT_LOC: | |
11632 | sections.loc_offset = offset; | |
11633 | sections.loc_size = size; | |
11634 | break; | |
11635 | case DW_SECT_STR_OFFSETS: | |
11636 | sections.str_offsets_offset = offset; | |
11637 | sections.str_offsets_size = size; | |
11638 | break; | |
11639 | case DW_SECT_MACINFO: | |
11640 | sections.macinfo_offset = offset; | |
11641 | sections.macinfo_size = size; | |
11642 | break; | |
11643 | case DW_SECT_MACRO: | |
11644 | sections.macro_offset = offset; | |
11645 | sections.macro_size = size; | |
11646 | break; | |
11647 | } | |
11648 | } | |
11649 | ||
11650 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11651 | have dwo_unit "live" in that. At least for now. | |
11652 | ||
11653 | The DWP file can be made up of a random collection of CUs and TUs. | |
11654 | However, for each CU + set of TUs that came from the same original DWO | |
11655 | file, we can combine them back into a virtual DWO file to save space | |
11656 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11657 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11658 | ||
791afaa2 TT |
11659 | std::string virtual_dwo_name = |
11660 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11661 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11662 | (long) (sections.line_size ? sections.line_offset : 0), | |
11663 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11664 | (long) (sections.str_offsets_size | |
11665 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11666 | /* Can we use an existing virtual DWO file? */ |
976ca316 | 11667 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, virtual_dwo_name.c_str (), |
ed2dc618 | 11668 | comp_dir); |
73869dc2 DE |
11669 | /* Create one if necessary. */ |
11670 | if (*dwo_file_slot == NULL) | |
11671 | { | |
6f738b01 SM |
11672 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11673 | virtual_dwo_name.c_str ()); | |
11674 | ||
51ac9db5 | 11675 | dwo_file = new struct dwo_file; |
976ca316 | 11676 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); |
73869dc2 DE |
11677 | dwo_file->comp_dir = comp_dir; |
11678 | dwo_file->sections.abbrev = | |
d2854d8d CT |
11679 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.abbrev, |
11680 | sections.abbrev_offset, | |
11681 | sections.abbrev_size); | |
73869dc2 | 11682 | dwo_file->sections.line = |
d2854d8d CT |
11683 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.line, |
11684 | sections.line_offset, | |
11685 | sections.line_size); | |
73869dc2 | 11686 | dwo_file->sections.loc = |
d2854d8d CT |
11687 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.loc, |
11688 | sections.loc_offset, sections.loc_size); | |
73869dc2 | 11689 | dwo_file->sections.macinfo = |
d2854d8d CT |
11690 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.macinfo, |
11691 | sections.macinfo_offset, | |
11692 | sections.macinfo_size); | |
73869dc2 | 11693 | dwo_file->sections.macro = |
d2854d8d CT |
11694 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.macro, |
11695 | sections.macro_offset, | |
11696 | sections.macro_size); | |
73869dc2 | 11697 | dwo_file->sections.str_offsets = |
d2854d8d CT |
11698 | create_dwp_v2_or_v5_section (per_objfile, |
11699 | &dwp_file->sections.str_offsets, | |
11700 | sections.str_offsets_offset, | |
11701 | sections.str_offsets_size); | |
73869dc2 DE |
11702 | /* The "str" section is global to the entire DWP file. */ |
11703 | dwo_file->sections.str = dwp_file->sections.str; | |
11704 | /* The info or types section is assigned below to dwo_unit, | |
11705 | there's no need to record it in dwo_file. | |
11706 | Also, we can't simply record type sections in dwo_file because | |
11707 | we record a pointer into the vector in dwo_unit. As we collect more | |
11708 | types we'll grow the vector and eventually have to reallocate space | |
11709 | for it, invalidating all copies of pointers into the previous | |
11710 | contents. */ | |
11711 | *dwo_file_slot = dwo_file; | |
11712 | } | |
11713 | else | |
11714 | { | |
6f738b01 SM |
11715 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11716 | virtual_dwo_name.c_str ()); | |
11717 | ||
9a3c8263 | 11718 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11719 | } |
73869dc2 | 11720 | |
976ca316 | 11721 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); |
73869dc2 DE |
11722 | dwo_unit->dwo_file = dwo_file; |
11723 | dwo_unit->signature = signature; | |
8d749320 | 11724 | dwo_unit->section = |
976ca316 | 11725 | XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); |
d2854d8d | 11726 | *dwo_unit->section = create_dwp_v2_or_v5_section |
dda83cd7 | 11727 | (per_objfile, |
d2854d8d CT |
11728 | is_debug_types |
11729 | ? &dwp_file->sections.types | |
11730 | : &dwp_file->sections.info, | |
11731 | sections.info_or_types_offset, | |
11732 | sections.info_or_types_size); | |
11733 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11734 | ||
11735 | return dwo_unit; | |
11736 | } | |
11737 | ||
11738 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11739 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11740 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11741 | This is for DWP version 5 files. */ | |
11742 | ||
11743 | static struct dwo_unit * | |
11744 | create_dwo_unit_in_dwp_v5 (dwarf2_per_objfile *per_objfile, | |
11745 | struct dwp_file *dwp_file, | |
11746 | uint32_t unit_index, | |
11747 | const char *comp_dir, | |
11748 | ULONGEST signature, int is_debug_types) | |
11749 | { | |
11750 | const struct dwp_hash_table *dwp_htab | |
11751 | = is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11752 | bfd *dbfd = dwp_file->dbfd.get (); | |
11753 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11754 | struct dwo_file *dwo_file; | |
11755 | struct dwo_unit *dwo_unit; | |
11756 | struct virtual_v2_or_v5_dwo_sections sections {}; | |
11757 | void **dwo_file_slot; | |
11758 | ||
11759 | gdb_assert (dwp_file->version == 5); | |
11760 | ||
6f738b01 SM |
11761 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V5 file: %s", |
11762 | kind, pulongest (unit_index), hex_string (signature), | |
11763 | dwp_file->name); | |
d2854d8d CT |
11764 | |
11765 | /* Fetch the section offsets of this DWO unit. */ | |
11766 | ||
11767 | /* memset (§ions, 0, sizeof (sections)); */ | |
11768 | ||
11769 | for (int i = 0; i < dwp_htab->nr_columns; ++i) | |
11770 | { | |
11771 | uint32_t offset = read_4_bytes (dbfd, | |
dda83cd7 SM |
11772 | dwp_htab->section_pool.v5.offsets |
11773 | + (((unit_index - 1) | |
11774 | * dwp_htab->nr_columns | |
11775 | + i) | |
11776 | * sizeof (uint32_t))); | |
d2854d8d | 11777 | uint32_t size = read_4_bytes (dbfd, |
dda83cd7 SM |
11778 | dwp_htab->section_pool.v5.sizes |
11779 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11780 | + i) | |
11781 | * sizeof (uint32_t))); | |
d2854d8d CT |
11782 | |
11783 | switch (dwp_htab->section_pool.v5.section_ids[i]) | |
dda83cd7 SM |
11784 | { |
11785 | case DW_SECT_ABBREV_V5: | |
11786 | sections.abbrev_offset = offset; | |
11787 | sections.abbrev_size = size; | |
11788 | break; | |
11789 | case DW_SECT_INFO_V5: | |
11790 | sections.info_or_types_offset = offset; | |
11791 | sections.info_or_types_size = size; | |
11792 | break; | |
11793 | case DW_SECT_LINE_V5: | |
11794 | sections.line_offset = offset; | |
11795 | sections.line_size = size; | |
11796 | break; | |
11797 | case DW_SECT_LOCLISTS_V5: | |
11798 | sections.loclists_offset = offset; | |
11799 | sections.loclists_size = size; | |
11800 | break; | |
11801 | case DW_SECT_MACRO_V5: | |
11802 | sections.macro_offset = offset; | |
11803 | sections.macro_size = size; | |
11804 | break; | |
11805 | case DW_SECT_RNGLISTS_V5: | |
11806 | sections.rnglists_offset = offset; | |
11807 | sections.rnglists_size = size; | |
11808 | break; | |
11809 | case DW_SECT_STR_OFFSETS_V5: | |
11810 | sections.str_offsets_offset = offset; | |
11811 | sections.str_offsets_size = size; | |
11812 | break; | |
11813 | case DW_SECT_RESERVED_V5: | |
11814 | default: | |
11815 | break; | |
11816 | } | |
d2854d8d CT |
11817 | } |
11818 | ||
11819 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11820 | have dwo_unit "live" in that. At least for now. | |
11821 | ||
11822 | The DWP file can be made up of a random collection of CUs and TUs. | |
11823 | However, for each CU + set of TUs that came from the same original DWO | |
11824 | file, we can combine them back into a virtual DWO file to save space | |
11825 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11826 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11827 | ||
11828 | std::string virtual_dwo_name = | |
11829 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld-%ld-%ld", | |
dda83cd7 SM |
11830 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), |
11831 | (long) (sections.line_size ? sections.line_offset : 0), | |
11832 | (long) (sections.loclists_size ? sections.loclists_offset : 0), | |
11833 | (long) (sections.str_offsets_size | |
11834 | ? sections.str_offsets_offset : 0), | |
11835 | (long) (sections.macro_size ? sections.macro_offset : 0), | |
11836 | (long) (sections.rnglists_size ? sections.rnglists_offset: 0)); | |
d2854d8d CT |
11837 | /* Can we use an existing virtual DWO file? */ |
11838 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, | |
dda83cd7 SM |
11839 | virtual_dwo_name.c_str (), |
11840 | comp_dir); | |
d2854d8d CT |
11841 | /* Create one if necessary. */ |
11842 | if (*dwo_file_slot == NULL) | |
11843 | { | |
6f738b01 SM |
11844 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11845 | virtual_dwo_name.c_str ()); | |
11846 | ||
d2854d8d CT |
11847 | dwo_file = new struct dwo_file; |
11848 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); | |
11849 | dwo_file->comp_dir = comp_dir; | |
11850 | dwo_file->sections.abbrev = | |
dda83cd7 SM |
11851 | create_dwp_v2_or_v5_section (per_objfile, |
11852 | &dwp_file->sections.abbrev, | |
11853 | sections.abbrev_offset, | |
11854 | sections.abbrev_size); | |
d2854d8d | 11855 | dwo_file->sections.line = |
dda83cd7 SM |
11856 | create_dwp_v2_or_v5_section (per_objfile, |
11857 | &dwp_file->sections.line, | |
11858 | sections.line_offset, sections.line_size); | |
d2854d8d | 11859 | dwo_file->sections.macro = |
dda83cd7 SM |
11860 | create_dwp_v2_or_v5_section (per_objfile, |
11861 | &dwp_file->sections.macro, | |
11862 | sections.macro_offset, | |
11863 | sections.macro_size); | |
d2854d8d | 11864 | dwo_file->sections.loclists = |
dda83cd7 SM |
11865 | create_dwp_v2_or_v5_section (per_objfile, |
11866 | &dwp_file->sections.loclists, | |
11867 | sections.loclists_offset, | |
11868 | sections.loclists_size); | |
d2854d8d | 11869 | dwo_file->sections.rnglists = |
dda83cd7 SM |
11870 | create_dwp_v2_or_v5_section (per_objfile, |
11871 | &dwp_file->sections.rnglists, | |
11872 | sections.rnglists_offset, | |
11873 | sections.rnglists_size); | |
d2854d8d | 11874 | dwo_file->sections.str_offsets = |
dda83cd7 SM |
11875 | create_dwp_v2_or_v5_section (per_objfile, |
11876 | &dwp_file->sections.str_offsets, | |
11877 | sections.str_offsets_offset, | |
11878 | sections.str_offsets_size); | |
d2854d8d CT |
11879 | /* The "str" section is global to the entire DWP file. */ |
11880 | dwo_file->sections.str = dwp_file->sections.str; | |
11881 | /* The info or types section is assigned below to dwo_unit, | |
dda83cd7 SM |
11882 | there's no need to record it in dwo_file. |
11883 | Also, we can't simply record type sections in dwo_file because | |
11884 | we record a pointer into the vector in dwo_unit. As we collect more | |
11885 | types we'll grow the vector and eventually have to reallocate space | |
11886 | for it, invalidating all copies of pointers into the previous | |
11887 | contents. */ | |
d2854d8d CT |
11888 | *dwo_file_slot = dwo_file; |
11889 | } | |
11890 | else | |
11891 | { | |
6f738b01 SM |
11892 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11893 | virtual_dwo_name.c_str ()); | |
11894 | ||
d2854d8d CT |
11895 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
11896 | } | |
11897 | ||
11898 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); | |
11899 | dwo_unit->dwo_file = dwo_file; | |
11900 | dwo_unit->signature = signature; | |
11901 | dwo_unit->section | |
11902 | = XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); | |
11903 | *dwo_unit->section = create_dwp_v2_or_v5_section (per_objfile, | |
dda83cd7 SM |
11904 | &dwp_file->sections.info, |
11905 | sections.info_or_types_offset, | |
11906 | sections.info_or_types_size); | |
73869dc2 DE |
11907 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
11908 | ||
11909 | return dwo_unit; | |
11910 | } | |
11911 | ||
57d63ce2 DE |
11912 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11913 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11914 | |
11915 | static struct dwo_unit * | |
976ca316 | 11916 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11917 | struct dwp_file *dwp_file, const char *comp_dir, |
57d63ce2 | 11918 | ULONGEST signature, int is_debug_types) |
80626a55 | 11919 | { |
57d63ce2 DE |
11920 | const struct dwp_hash_table *dwp_htab = |
11921 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11922 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 11923 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11924 | uint32_t hash = signature & mask; |
11925 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11926 | unsigned int i; | |
11927 | void **slot; | |
870f88f7 | 11928 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11929 | |
11930 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11931 | find_dwo_cu.signature = signature; | |
19ac8c2e | 11932 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
11933 | ? dwp_file->loaded_tus.get () |
11934 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 11935 | &find_dwo_cu, INSERT); |
80626a55 DE |
11936 | |
11937 | if (*slot != NULL) | |
9a3c8263 | 11938 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11939 | |
11940 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11941 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11942 | { |
11943 | ULONGEST signature_in_table; | |
11944 | ||
11945 | signature_in_table = | |
57d63ce2 | 11946 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11947 | if (signature_in_table == signature) |
11948 | { | |
57d63ce2 DE |
11949 | uint32_t unit_index = |
11950 | read_4_bytes (dbfd, | |
11951 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11952 | |
73869dc2 DE |
11953 | if (dwp_file->version == 1) |
11954 | { | |
976ca316 SM |
11955 | *slot = create_dwo_unit_in_dwp_v1 (per_objfile, dwp_file, |
11956 | unit_index, comp_dir, | |
11957 | signature, is_debug_types); | |
73869dc2 | 11958 | } |
d2854d8d | 11959 | else if (dwp_file->version == 2) |
73869dc2 | 11960 | { |
976ca316 SM |
11961 | *slot = create_dwo_unit_in_dwp_v2 (per_objfile, dwp_file, |
11962 | unit_index, comp_dir, | |
11963 | signature, is_debug_types); | |
73869dc2 | 11964 | } |
d2854d8d CT |
11965 | else /* version == 5 */ |
11966 | { | |
11967 | *slot = create_dwo_unit_in_dwp_v5 (per_objfile, dwp_file, | |
11968 | unit_index, comp_dir, | |
11969 | signature, is_debug_types); | |
11970 | } | |
9a3c8263 | 11971 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11972 | } |
11973 | if (signature_in_table == 0) | |
11974 | return NULL; | |
11975 | hash = (hash + hash2) & mask; | |
11976 | } | |
11977 | ||
11978 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11979 | " [in module %s]"), | |
11980 | dwp_file->name); | |
11981 | } | |
11982 | ||
ab5088bf | 11983 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11984 | Open the file specified by FILE_NAME and hand it off to BFD for |
11985 | preliminary analysis. Return a newly initialized bfd *, which | |
11986 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 11987 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
11988 | SEARCH_CWD is true if the current directory is to be searched. |
11989 | It will be searched before debug-file-directory. | |
13aaf454 DE |
11990 | If successful, the file is added to the bfd include table of the |
11991 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 11992 | If unable to find/open the file, return NULL. |
3019eac3 DE |
11993 | NOTE: This function is derived from symfile_bfd_open. */ |
11994 | ||
192b62ce | 11995 | static gdb_bfd_ref_ptr |
976ca316 | 11996 | try_open_dwop_file (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11997 | const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 11998 | { |
24b9144d | 11999 | int desc; |
9c02c129 DE |
12000 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12001 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12002 | to debug_file_directory. */ | |
e0cc99a6 | 12003 | const char *search_path; |
9c02c129 DE |
12004 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12005 | ||
e0cc99a6 | 12006 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12007 | if (search_cwd) |
12008 | { | |
12009 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12010 | { |
12011 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12012 | debug_file_directory, | |
12013 | (char *) NULL)); | |
12014 | search_path = search_path_holder.get (); | |
12015 | } | |
6ac97d4c | 12016 | else |
e0cc99a6 | 12017 | search_path = "."; |
6ac97d4c | 12018 | } |
9c02c129 | 12019 | else |
e0cc99a6 | 12020 | search_path = debug_file_directory; |
3019eac3 | 12021 | |
56d467f4 CT |
12022 | /* Add the path for the executable binary to the list of search paths. */ |
12023 | std::string objfile_dir = ldirname (objfile_name (per_objfile->objfile)); | |
12024 | search_path_holder.reset (concat (objfile_dir.c_str (), | |
12025 | dirname_separator_string, | |
12026 | search_path, nullptr)); | |
12027 | search_path = search_path_holder.get (); | |
12028 | ||
24b9144d | 12029 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12030 | if (is_dwp) |
12031 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12032 | |
12033 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12034 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12035 | O_RDONLY | O_BINARY, &absolute_name); |
12036 | if (desc < 0) | |
12037 | return NULL; | |
12038 | ||
e0cc99a6 TT |
12039 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12040 | gnutarget, desc)); | |
9c02c129 DE |
12041 | if (sym_bfd == NULL) |
12042 | return NULL; | |
192b62ce | 12043 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12044 | |
192b62ce TT |
12045 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12046 | return NULL; | |
3019eac3 | 12047 | |
13aaf454 DE |
12048 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12049 | This is important because things like demangled_names_hash lives in the | |
12050 | objfile's per_bfd space and may have references to things like symbol | |
12051 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
976ca316 | 12052 | gdb_bfd_record_inclusion (per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12053 | |
3019eac3 DE |
12054 | return sym_bfd; |
12055 | } | |
12056 | ||
ab5088bf | 12057 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12058 | COMP_DIR is the DW_AT_comp_dir attribute. |
12059 | The result is the bfd handle of the file. | |
12060 | If there is a problem finding or opening the file, return NULL. | |
12061 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12062 | same as symfile_bfd_open. */ | |
12063 | ||
192b62ce | 12064 | static gdb_bfd_ref_ptr |
976ca316 | 12065 | open_dwo_file (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 12066 | const char *file_name, const char *comp_dir) |
3019eac3 | 12067 | { |
80626a55 | 12068 | if (IS_ABSOLUTE_PATH (file_name)) |
976ca316 | 12069 | return try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12070 | 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
12071 | |
12072 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12073 | ||
12074 | if (comp_dir != NULL) | |
12075 | { | |
43816ebc TT |
12076 | gdb::unique_xmalloc_ptr<char> path_to_try |
12077 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12078 | |
12079 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12080 | search path, which seems useful. */ | |
976ca316 | 12081 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (per_objfile, path_to_try.get (), |
ed2dc618 | 12082 | 0 /*is_dwp*/, |
192b62ce | 12083 | 1 /*search_cwd*/)); |
3019eac3 DE |
12084 | if (abfd != NULL) |
12085 | return abfd; | |
12086 | } | |
12087 | ||
12088 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12089 | is a list of paths. */ | |
12090 | ||
12091 | if (*debug_file_directory == '\0') | |
12092 | return NULL; | |
12093 | ||
976ca316 | 12094 | return try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12095 | 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
12096 | } |
12097 | ||
80626a55 DE |
12098 | /* This function is mapped across the sections and remembers the offset and |
12099 | size of each of the DWO debugging sections we are interested in. */ | |
12100 | ||
12101 | static void | |
5bb6e9dd TT |
12102 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, |
12103 | dwo_sections *dwo_sections) | |
80626a55 | 12104 | { |
80626a55 DE |
12105 | const struct dwop_section_names *names = &dwop_section_names; |
12106 | ||
fbedd546 | 12107 | if (names->abbrev_dwo.matches (sectp->name)) |
80626a55 | 12108 | { |
049412e3 | 12109 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12110 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 | 12111 | } |
fbedd546 | 12112 | else if (names->info_dwo.matches (sectp->name)) |
80626a55 | 12113 | { |
049412e3 | 12114 | dwo_sections->info.s.section = sectp; |
fd361982 | 12115 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 | 12116 | } |
fbedd546 | 12117 | else if (names->line_dwo.matches (sectp->name)) |
80626a55 | 12118 | { |
049412e3 | 12119 | dwo_sections->line.s.section = sectp; |
fd361982 | 12120 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 | 12121 | } |
fbedd546 | 12122 | else if (names->loc_dwo.matches (sectp->name)) |
80626a55 | 12123 | { |
049412e3 | 12124 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12125 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 | 12126 | } |
fbedd546 | 12127 | else if (names->loclists_dwo.matches (sectp->name)) |
41144253 | 12128 | { |
12129 | dwo_sections->loclists.s.section = sectp; | |
12130 | dwo_sections->loclists.size = bfd_section_size (sectp); | |
12131 | } | |
fbedd546 | 12132 | else if (names->macinfo_dwo.matches (sectp->name)) |
80626a55 | 12133 | { |
049412e3 | 12134 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12135 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 | 12136 | } |
fbedd546 | 12137 | else if (names->macro_dwo.matches (sectp->name)) |
80626a55 | 12138 | { |
049412e3 | 12139 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12140 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 | 12141 | } |
fbedd546 | 12142 | else if (names->rnglists_dwo.matches (sectp->name)) |
d0ce17d8 CT |
12143 | { |
12144 | dwo_sections->rnglists.s.section = sectp; | |
12145 | dwo_sections->rnglists.size = bfd_section_size (sectp); | |
12146 | } | |
fbedd546 | 12147 | else if (names->str_dwo.matches (sectp->name)) |
80626a55 | 12148 | { |
049412e3 | 12149 | dwo_sections->str.s.section = sectp; |
fd361982 | 12150 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 | 12151 | } |
fbedd546 | 12152 | else if (names->str_offsets_dwo.matches (sectp->name)) |
80626a55 | 12153 | { |
049412e3 | 12154 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12155 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 | 12156 | } |
fbedd546 | 12157 | else if (names->types_dwo.matches (sectp->name)) |
80626a55 DE |
12158 | { |
12159 | struct dwarf2_section_info type_section; | |
12160 | ||
12161 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12162 | type_section.s.section = sectp; |
fd361982 | 12163 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12164 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12165 | } |
12166 | } | |
12167 | ||
ab5088bf | 12168 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12169 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12170 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12171 | |
12172 | static struct dwo_file * | |
4ab09049 SM |
12173 | open_and_init_dwo_file (dwarf2_cu *cu, const char *dwo_name, |
12174 | const char *comp_dir) | |
3019eac3 | 12175 | { |
976ca316 | 12176 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 | 12177 | |
976ca316 | 12178 | gdb_bfd_ref_ptr dbfd = open_dwo_file (per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12179 | if (dbfd == NULL) |
12180 | { | |
6f738b01 SM |
12181 | dwarf_read_debug_printf ("DWO file not found: %s", dwo_name); |
12182 | ||
80626a55 DE |
12183 | return NULL; |
12184 | } | |
263db9a1 | 12185 | |
51ac9db5 | 12186 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12187 | dwo_file->dwo_name = dwo_name; |
12188 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12189 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12190 | |
5bb6e9dd TT |
12191 | for (asection *sec : gdb_bfd_sections (dwo_file->dbfd)) |
12192 | dwarf2_locate_dwo_sections (dwo_file->dbfd.get (), sec, | |
12193 | &dwo_file->sections); | |
3019eac3 | 12194 | |
976ca316 SM |
12195 | create_cus_hash_table (per_objfile, cu, *dwo_file, dwo_file->sections.info, |
12196 | dwo_file->cus); | |
3019eac3 | 12197 | |
d2854d8d CT |
12198 | if (cu->per_cu->dwarf_version < 5) |
12199 | { | |
12200 | create_debug_types_hash_table (per_objfile, dwo_file.get (), | |
12201 | dwo_file->sections.types, dwo_file->tus); | |
12202 | } | |
12203 | else | |
12204 | { | |
12205 | create_debug_type_hash_table (per_objfile, dwo_file.get (), | |
12206 | &dwo_file->sections.info, dwo_file->tus, | |
30c80d88 | 12207 | rcuh_kind::COMPILE); |
d2854d8d | 12208 | } |
3019eac3 | 12209 | |
6f738b01 | 12210 | dwarf_read_debug_printf ("DWO file found: %s", dwo_name); |
80626a55 | 12211 | |
263db9a1 | 12212 | return dwo_file.release (); |
3019eac3 DE |
12213 | } |
12214 | ||
80626a55 | 12215 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12216 | size of each of the DWP debugging sections common to version 1 and 2 that |
12217 | we are interested in. */ | |
3019eac3 | 12218 | |
80626a55 | 12219 | static void |
73869dc2 | 12220 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
5bb6e9dd | 12221 | dwp_file *dwp_file) |
3019eac3 | 12222 | { |
80626a55 DE |
12223 | const struct dwop_section_names *names = &dwop_section_names; |
12224 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12225 | |
80626a55 | 12226 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12227 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12228 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12229 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12230 | |
80626a55 | 12231 | /* Look for specific sections that we need. */ |
fbedd546 | 12232 | if (names->str_dwo.matches (sectp->name)) |
80626a55 | 12233 | { |
049412e3 | 12234 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12235 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 | 12236 | } |
fbedd546 | 12237 | else if (names->cu_index.matches (sectp->name)) |
80626a55 | 12238 | { |
049412e3 | 12239 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12240 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 | 12241 | } |
fbedd546 | 12242 | else if (names->tu_index.matches (sectp->name)) |
80626a55 | 12243 | { |
049412e3 | 12244 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12245 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12246 | } |
12247 | } | |
3019eac3 | 12248 | |
73869dc2 DE |
12249 | /* This function is mapped across the sections and remembers the offset and |
12250 | size of each of the DWP version 2 debugging sections that we are interested | |
12251 | in. This is split into a separate function because we don't know if we | |
d2854d8d | 12252 | have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */ |
73869dc2 DE |
12253 | |
12254 | static void | |
12255 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12256 | { | |
9a3c8263 | 12257 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12258 | const struct dwop_section_names *names = &dwop_section_names; |
12259 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12260 | ||
12261 | /* Record the ELF section number for later lookup: this is what the | |
12262 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12263 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12264 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12265 | ||
12266 | /* Look for specific sections that we need. */ | |
fbedd546 | 12267 | if (names->abbrev_dwo.matches (sectp->name)) |
73869dc2 | 12268 | { |
049412e3 | 12269 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12270 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 | 12271 | } |
fbedd546 | 12272 | else if (names->info_dwo.matches (sectp->name)) |
73869dc2 | 12273 | { |
049412e3 | 12274 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12275 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 | 12276 | } |
fbedd546 | 12277 | else if (names->line_dwo.matches (sectp->name)) |
73869dc2 | 12278 | { |
049412e3 | 12279 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12280 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 | 12281 | } |
fbedd546 | 12282 | else if (names->loc_dwo.matches (sectp->name)) |
73869dc2 | 12283 | { |
049412e3 | 12284 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12285 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 | 12286 | } |
fbedd546 | 12287 | else if (names->macinfo_dwo.matches (sectp->name)) |
73869dc2 | 12288 | { |
049412e3 | 12289 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12290 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 | 12291 | } |
fbedd546 | 12292 | else if (names->macro_dwo.matches (sectp->name)) |
73869dc2 | 12293 | { |
049412e3 | 12294 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12295 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 | 12296 | } |
fbedd546 | 12297 | else if (names->str_offsets_dwo.matches (sectp->name)) |
73869dc2 | 12298 | { |
049412e3 | 12299 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12300 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 | 12301 | } |
fbedd546 | 12302 | else if (names->types_dwo.matches (sectp->name)) |
73869dc2 | 12303 | { |
049412e3 | 12304 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12305 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12306 | } |
12307 | } | |
12308 | ||
d2854d8d CT |
12309 | /* This function is mapped across the sections and remembers the offset and |
12310 | size of each of the DWP version 5 debugging sections that we are interested | |
12311 | in. This is split into a separate function because we don't know if we | |
12312 | have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */ | |
12313 | ||
12314 | static void | |
12315 | dwarf2_locate_v5_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12316 | { | |
12317 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; | |
12318 | const struct dwop_section_names *names = &dwop_section_names; | |
12319 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12320 | ||
12321 | /* Record the ELF section number for later lookup: this is what the | |
12322 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12323 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12324 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12325 | ||
12326 | /* Look for specific sections that we need. */ | |
fbedd546 | 12327 | if (names->abbrev_dwo.matches (sectp->name)) |
d2854d8d CT |
12328 | { |
12329 | dwp_file->sections.abbrev.s.section = sectp; | |
12330 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); | |
12331 | } | |
fbedd546 | 12332 | else if (names->info_dwo.matches (sectp->name)) |
d2854d8d CT |
12333 | { |
12334 | dwp_file->sections.info.s.section = sectp; | |
12335 | dwp_file->sections.info.size = bfd_section_size (sectp); | |
12336 | } | |
fbedd546 | 12337 | else if (names->line_dwo.matches (sectp->name)) |
d2854d8d CT |
12338 | { |
12339 | dwp_file->sections.line.s.section = sectp; | |
12340 | dwp_file->sections.line.size = bfd_section_size (sectp); | |
12341 | } | |
fbedd546 | 12342 | else if (names->loclists_dwo.matches (sectp->name)) |
d2854d8d CT |
12343 | { |
12344 | dwp_file->sections.loclists.s.section = sectp; | |
12345 | dwp_file->sections.loclists.size = bfd_section_size (sectp); | |
12346 | } | |
fbedd546 | 12347 | else if (names->macro_dwo.matches (sectp->name)) |
d2854d8d CT |
12348 | { |
12349 | dwp_file->sections.macro.s.section = sectp; | |
12350 | dwp_file->sections.macro.size = bfd_section_size (sectp); | |
12351 | } | |
fbedd546 | 12352 | else if (names->rnglists_dwo.matches (sectp->name)) |
d2854d8d CT |
12353 | { |
12354 | dwp_file->sections.rnglists.s.section = sectp; | |
12355 | dwp_file->sections.rnglists.size = bfd_section_size (sectp); | |
12356 | } | |
fbedd546 | 12357 | else if (names->str_offsets_dwo.matches (sectp->name)) |
d2854d8d CT |
12358 | { |
12359 | dwp_file->sections.str_offsets.s.section = sectp; | |
12360 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); | |
12361 | } | |
12362 | } | |
12363 | ||
80626a55 | 12364 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12365 | |
80626a55 DE |
12366 | static hashval_t |
12367 | hash_dwp_loaded_cutus (const void *item) | |
12368 | { | |
9a3c8263 | 12369 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12370 | |
80626a55 DE |
12371 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12372 | return dwo_unit->signature; | |
3019eac3 DE |
12373 | } |
12374 | ||
80626a55 | 12375 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12376 | |
80626a55 DE |
12377 | static int |
12378 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12379 | { |
9a3c8263 SM |
12380 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12381 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12382 | |
80626a55 DE |
12383 | return dua->signature == dub->signature; |
12384 | } | |
3019eac3 | 12385 | |
80626a55 | 12386 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12387 | |
48b490f2 | 12388 | static htab_up |
298e9637 | 12389 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12390 | { |
48b490f2 TT |
12391 | return htab_up (htab_create_alloc (3, |
12392 | hash_dwp_loaded_cutus, | |
12393 | eq_dwp_loaded_cutus, | |
12394 | NULL, xcalloc, xfree)); | |
80626a55 | 12395 | } |
3019eac3 | 12396 | |
ab5088bf DE |
12397 | /* Try to open DWP file FILE_NAME. |
12398 | The result is the bfd handle of the file. | |
12399 | If there is a problem finding or opening the file, return NULL. | |
12400 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12401 | same as symfile_bfd_open. */ | |
12402 | ||
192b62ce | 12403 | static gdb_bfd_ref_ptr |
976ca316 | 12404 | open_dwp_file (dwarf2_per_objfile *per_objfile, const char *file_name) |
ab5088bf | 12405 | { |
976ca316 | 12406 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12407 | 1 /*is_dwp*/, |
192b62ce | 12408 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12409 | if (abfd != NULL) |
12410 | return abfd; | |
12411 | ||
12412 | /* Work around upstream bug 15652. | |
12413 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12414 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12415 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12416 | of the executable's path may have discarded the needed info. | |
12417 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12418 | .gnu_debuglink, but that doesn't exist yet.] | |
12419 | Strip the directory from FILE_NAME and search again. */ | |
12420 | if (*debug_file_directory != '\0') | |
12421 | { | |
12422 | /* Don't implicitly search the current directory here. | |
12423 | If the user wants to search "." to handle this case, | |
12424 | it must be added to debug-file-directory. */ | |
976ca316 SM |
12425 | return try_open_dwop_file (per_objfile, lbasename (file_name), |
12426 | 1 /*is_dwp*/, | |
6ac97d4c DE |
12427 | 0 /*search_cwd*/); |
12428 | } | |
12429 | ||
12430 | return NULL; | |
ab5088bf DE |
12431 | } |
12432 | ||
80626a55 DE |
12433 | /* Initialize the use of the DWP file for the current objfile. |
12434 | By convention the name of the DWP file is ${objfile}.dwp. | |
12435 | The result is NULL if it can't be found. */ | |
a766d390 | 12436 | |
400174b1 | 12437 | static std::unique_ptr<struct dwp_file> |
976ca316 | 12438 | open_and_init_dwp_file (dwarf2_per_objfile *per_objfile) |
80626a55 | 12439 | { |
976ca316 | 12440 | struct objfile *objfile = per_objfile->objfile; |
80626a55 | 12441 | |
82bf32bc JK |
12442 | /* Try to find first .dwp for the binary file before any symbolic links |
12443 | resolving. */ | |
6c447423 DE |
12444 | |
12445 | /* If the objfile is a debug file, find the name of the real binary | |
12446 | file and get the name of dwp file from there. */ | |
d721ba37 | 12447 | std::string dwp_name; |
6c447423 DE |
12448 | if (objfile->separate_debug_objfile_backlink != NULL) |
12449 | { | |
12450 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12451 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12452 | |
d721ba37 | 12453 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12454 | } |
12455 | else | |
d721ba37 PA |
12456 | dwp_name = objfile->original_name; |
12457 | ||
12458 | dwp_name += ".dwp"; | |
80626a55 | 12459 | |
976ca316 | 12460 | gdb_bfd_ref_ptr dbfd (open_dwp_file (per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12461 | if (dbfd == NULL |
12462 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12463 | { | |
12464 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12465 | dwp_name = objfile_name (objfile); |
12466 | dwp_name += ".dwp"; | |
976ca316 | 12467 | dbfd = open_dwp_file (per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12468 | } |
12469 | ||
80626a55 DE |
12470 | if (dbfd == NULL) |
12471 | { | |
6f738b01 SM |
12472 | dwarf_read_debug_printf ("DWP file not found: %s", dwp_name.c_str ()); |
12473 | ||
400174b1 | 12474 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12475 | } |
400174b1 TT |
12476 | |
12477 | const char *name = bfd_get_filename (dbfd.get ()); | |
12478 | std::unique_ptr<struct dwp_file> dwp_file | |
12479 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12480 | |
0a0f4c01 | 12481 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 | 12482 | dwp_file->elf_sections = |
976ca316 | 12483 | OBSTACK_CALLOC (&per_objfile->per_bfd->obstack, |
80626a55 DE |
12484 | dwp_file->num_sections, asection *); |
12485 | ||
5bb6e9dd TT |
12486 | for (asection *sec : gdb_bfd_sections (dwp_file->dbfd)) |
12487 | dwarf2_locate_common_dwp_sections (dwp_file->dbfd.get (), sec, | |
12488 | dwp_file.get ()); | |
80626a55 | 12489 | |
976ca316 | 12490 | dwp_file->cus = create_dwp_hash_table (per_objfile, dwp_file.get (), 0); |
80626a55 | 12491 | |
976ca316 | 12492 | dwp_file->tus = create_dwp_hash_table (per_objfile, dwp_file.get (), 1); |
80626a55 | 12493 | |
73869dc2 | 12494 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12495 | if (dwp_file->cus && dwp_file->tus |
12496 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12497 | { |
12498 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12499 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12500 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12501 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12502 | " TU version %s [in DWP file %s]"), | |
12503 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12504 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12505 | } |
08302ed2 DE |
12506 | |
12507 | if (dwp_file->cus) | |
12508 | dwp_file->version = dwp_file->cus->version; | |
12509 | else if (dwp_file->tus) | |
12510 | dwp_file->version = dwp_file->tus->version; | |
12511 | else | |
12512 | dwp_file->version = 2; | |
73869dc2 | 12513 | |
5bb6e9dd TT |
12514 | for (asection *sec : gdb_bfd_sections (dwp_file->dbfd)) |
12515 | { | |
12516 | if (dwp_file->version == 2) | |
12517 | dwarf2_locate_v2_dwp_sections (dwp_file->dbfd.get (), sec, | |
12518 | dwp_file.get ()); | |
12519 | else | |
12520 | dwarf2_locate_v5_dwp_sections (dwp_file->dbfd.get (), sec, | |
12521 | dwp_file.get ()); | |
12522 | } | |
73869dc2 | 12523 | |
298e9637 SM |
12524 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12525 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12526 | |
6f738b01 SM |
12527 | dwarf_read_debug_printf ("DWP file found: %s", dwp_file->name); |
12528 | dwarf_read_debug_printf (" %s CUs, %s TUs", | |
12529 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12530 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12531 | |
12532 | return dwp_file; | |
3019eac3 | 12533 | } |
c906108c | 12534 | |
ab5088bf DE |
12535 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12536 | ||
12537 | static struct dwp_file * | |
976ca316 | 12538 | get_dwp_file (dwarf2_per_objfile *per_objfile) |
ab5088bf | 12539 | { |
976ca316 | 12540 | if (!per_objfile->per_bfd->dwp_checked) |
ab5088bf | 12541 | { |
976ca316 SM |
12542 | per_objfile->per_bfd->dwp_file = open_and_init_dwp_file (per_objfile); |
12543 | per_objfile->per_bfd->dwp_checked = 1; | |
ab5088bf | 12544 | } |
976ca316 | 12545 | return per_objfile->per_bfd->dwp_file.get (); |
ab5088bf DE |
12546 | } |
12547 | ||
80626a55 DE |
12548 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12549 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12550 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12551 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12552 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12553 | ||
12554 | This is called, for example, when wanting to read a variable with a | |
12555 | complex location. Therefore we don't want to do file i/o for every call. | |
12556 | Therefore we don't want to look for a DWO file on every call. | |
12557 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12558 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12559 | for a DWO file. | |
12560 | ||
1c658ad5 | 12561 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12562 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12563 | |
3019eac3 | 12564 | static struct dwo_unit * |
4ab09049 | 12565 | lookup_dwo_cutu (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
80626a55 | 12566 | ULONGEST signature, int is_debug_types) |
3019eac3 | 12567 | { |
976ca316 SM |
12568 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
12569 | struct objfile *objfile = per_objfile->objfile; | |
80626a55 DE |
12570 | const char *kind = is_debug_types ? "TU" : "CU"; |
12571 | void **dwo_file_slot; | |
3019eac3 | 12572 | struct dwo_file *dwo_file; |
80626a55 | 12573 | struct dwp_file *dwp_file; |
cb1df416 | 12574 | |
6a506a2d DE |
12575 | /* First see if there's a DWP file. |
12576 | If we have a DWP file but didn't find the DWO inside it, don't | |
12577 | look for the original DWO file. It makes gdb behave differently | |
12578 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12579 | |
976ca316 | 12580 | dwp_file = get_dwp_file (per_objfile); |
80626a55 | 12581 | if (dwp_file != NULL) |
cf2c3c16 | 12582 | { |
80626a55 DE |
12583 | const struct dwp_hash_table *dwp_htab = |
12584 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12585 | ||
12586 | if (dwp_htab != NULL) | |
12587 | { | |
12588 | struct dwo_unit *dwo_cutu = | |
976ca316 SM |
12589 | lookup_dwo_unit_in_dwp (per_objfile, dwp_file, comp_dir, signature, |
12590 | is_debug_types); | |
80626a55 DE |
12591 | |
12592 | if (dwo_cutu != NULL) | |
12593 | { | |
6f738b01 SM |
12594 | dwarf_read_debug_printf ("Virtual DWO %s %s found: @%s", |
12595 | kind, hex_string (signature), | |
12596 | host_address_to_string (dwo_cutu)); | |
12597 | ||
80626a55 DE |
12598 | return dwo_cutu; |
12599 | } | |
12600 | } | |
12601 | } | |
6a506a2d | 12602 | else |
80626a55 | 12603 | { |
6a506a2d | 12604 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12605 | |
976ca316 | 12606 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, dwo_name, comp_dir); |
6a506a2d | 12607 | if (*dwo_file_slot == NULL) |
80626a55 | 12608 | { |
6a506a2d | 12609 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
4ab09049 | 12610 | *dwo_file_slot = open_and_init_dwo_file (cu, dwo_name, comp_dir); |
19c3d4c9 | 12611 | } |
6a506a2d | 12612 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12613 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12614 | |
6a506a2d | 12615 | if (dwo_file != NULL) |
19c3d4c9 | 12616 | { |
6a506a2d DE |
12617 | struct dwo_unit *dwo_cutu = NULL; |
12618 | ||
12619 | if (is_debug_types && dwo_file->tus) | |
12620 | { | |
12621 | struct dwo_unit find_dwo_cutu; | |
12622 | ||
12623 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12624 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12625 | dwo_cutu |
b0b6a987 TT |
12626 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12627 | &find_dwo_cutu); | |
6a506a2d | 12628 | } |
33c5cd75 | 12629 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12630 | { |
33c5cd75 DB |
12631 | struct dwo_unit find_dwo_cutu; |
12632 | ||
12633 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12634 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12635 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12636 | &find_dwo_cutu); |
6a506a2d DE |
12637 | } |
12638 | ||
12639 | if (dwo_cutu != NULL) | |
12640 | { | |
6f738b01 SM |
12641 | dwarf_read_debug_printf ("DWO %s %s(%s) found: @%s", |
12642 | kind, dwo_name, hex_string (signature), | |
12643 | host_address_to_string (dwo_cutu)); | |
12644 | ||
6a506a2d | 12645 | return dwo_cutu; |
80626a55 DE |
12646 | } |
12647 | } | |
2e276125 | 12648 | } |
9cdd5dbd | 12649 | |
80626a55 DE |
12650 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12651 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12652 | correctly to find the file. */ | |
12653 | ||
6f738b01 SM |
12654 | dwarf_read_debug_printf ("DWO %s %s(%s) not found", |
12655 | kind, dwo_name, hex_string (signature)); | |
3019eac3 | 12656 | |
6656a72d DE |
12657 | /* This is a warning and not a complaint because it can be caused by |
12658 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12659 | { |
12660 | /* Print the name of the DWP file if we looked there, helps the user | |
12661 | better diagnose the problem. */ | |
791afaa2 | 12662 | std::string dwp_text; |
43942612 DE |
12663 | |
12664 | if (dwp_file != NULL) | |
791afaa2 TT |
12665 | dwp_text = string_printf (" [in DWP file %s]", |
12666 | lbasename (dwp_file->name)); | |
43942612 | 12667 | |
9d8780f0 | 12668 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 | 12669 | " [in module %s]"), |
4ab09049 SM |
12670 | kind, dwo_name, hex_string (signature), dwp_text.c_str (), kind, |
12671 | sect_offset_str (cu->per_cu->sect_off), objfile_name (objfile)); | |
43942612 | 12672 | } |
3019eac3 | 12673 | return NULL; |
5fb290d7 DJ |
12674 | } |
12675 | ||
80626a55 DE |
12676 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12677 | See lookup_dwo_cutu_unit for details. */ | |
12678 | ||
12679 | static struct dwo_unit * | |
4ab09049 | 12680 | lookup_dwo_comp_unit (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
80626a55 DE |
12681 | ULONGEST signature) |
12682 | { | |
4ab09049 SM |
12683 | gdb_assert (!cu->per_cu->is_debug_types); |
12684 | ||
12685 | return lookup_dwo_cutu (cu, dwo_name, comp_dir, signature, 0); | |
80626a55 DE |
12686 | } |
12687 | ||
12688 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12689 | See lookup_dwo_cutu_unit for details. */ | |
12690 | ||
12691 | static struct dwo_unit * | |
4ab09049 | 12692 | lookup_dwo_type_unit (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir) |
80626a55 | 12693 | { |
4ab09049 SM |
12694 | gdb_assert (cu->per_cu->is_debug_types); |
12695 | ||
12696 | signatured_type *sig_type = (signatured_type *) cu->per_cu; | |
12697 | ||
12698 | return lookup_dwo_cutu (cu, dwo_name, comp_dir, sig_type->signature, 1); | |
80626a55 DE |
12699 | } |
12700 | ||
89e63ee4 DE |
12701 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12702 | ||
12703 | static int | |
12704 | queue_and_load_dwo_tu (void **slot, void *info) | |
12705 | { | |
12706 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
d460f660 | 12707 | dwarf2_cu *cu = (dwarf2_cu *) info; |
89e63ee4 | 12708 | ULONGEST signature = dwo_unit->signature; |
d460f660 | 12709 | signatured_type *sig_type = lookup_dwo_signatured_type (cu, signature); |
89e63ee4 DE |
12710 | |
12711 | if (sig_type != NULL) | |
12712 | { | |
89e63ee4 DE |
12713 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's |
12714 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12715 | while processing PER_CU. */ | |
0d305d5c TT |
12716 | if (maybe_queue_comp_unit (NULL, sig_type, cu->per_objfile, |
12717 | cu->language)) | |
12718 | load_full_type_unit (sig_type, cu->per_objfile); | |
12719 | cu->per_cu->imported_symtabs_push (sig_type); | |
89e63ee4 DE |
12720 | } |
12721 | ||
12722 | return 1; | |
12723 | } | |
12724 | ||
1b555f17 | 12725 | /* Queue all TUs contained in the DWO of CU to be read in. |
89e63ee4 DE |
12726 | The DWO may have the only definition of the type, though it may not be |
12727 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12728 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12729 | ||
12730 | static void | |
1b555f17 | 12731 | queue_and_load_all_dwo_tus (dwarf2_cu *cu) |
89e63ee4 DE |
12732 | { |
12733 | struct dwo_unit *dwo_unit; | |
12734 | struct dwo_file *dwo_file; | |
12735 | ||
1b555f17 SM |
12736 | gdb_assert (cu != nullptr); |
12737 | gdb_assert (!cu->per_cu->is_debug_types); | |
12738 | gdb_assert (get_dwp_file (cu->per_objfile) == nullptr); | |
89e63ee4 | 12739 | |
1b555f17 | 12740 | dwo_unit = cu->dwo_unit; |
89e63ee4 DE |
12741 | gdb_assert (dwo_unit != NULL); |
12742 | ||
12743 | dwo_file = dwo_unit->dwo_file; | |
12744 | if (dwo_file->tus != NULL) | |
1b555f17 | 12745 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, cu); |
89e63ee4 DE |
12746 | } |
12747 | ||
3019eac3 | 12748 | /* Read in various DIEs. */ |
348e048f | 12749 | |
d389af10 | 12750 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12751 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12752 | already referenced by DW_AT_abstract_origin from the children of the | |
12753 | current DIE. */ | |
d389af10 JK |
12754 | |
12755 | static void | |
12756 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12757 | { | |
12758 | struct die_info *child_die; | |
791afaa2 | 12759 | sect_offset *offsetp; |
d389af10 JK |
12760 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12761 | struct die_info *origin_die; | |
12762 | /* Iterator of the ORIGIN_DIE children. */ | |
12763 | struct die_info *origin_child_die; | |
d389af10 | 12764 | struct attribute *attr; |
cd02d79d PA |
12765 | struct dwarf2_cu *origin_cu; |
12766 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12767 | |
12768 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12769 | if (!attr) | |
12770 | return; | |
12771 | ||
cd02d79d PA |
12772 | /* Note that following die references may follow to a die in a |
12773 | different cu. */ | |
12774 | ||
12775 | origin_cu = cu; | |
12776 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12777 | ||
12778 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12779 | symbols in. */ | |
12780 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12781 | origin_cu->list_in_scope = cu->list_in_scope; | |
12782 | ||
edb3359d DJ |
12783 | if (die->tag != origin_die->tag |
12784 | && !(die->tag == DW_TAG_inlined_subroutine | |
12785 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12786 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12787 | sect_offset_str (die->sect_off), |
12788 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12789 | |
34dc0f95 TBA |
12790 | /* Find if the concrete and abstract trees are structurally the |
12791 | same. This is a shallow traversal and it is not bullet-proof; | |
12792 | the compiler can trick the debugger into believing that the trees | |
12793 | are isomorphic, whereas they actually are not. However, the | |
12794 | likelyhood of this happening is pretty low, and a full-fledged | |
12795 | check would be an overkill. */ | |
12796 | bool are_isomorphic = true; | |
12797 | die_info *concrete_child = die->child; | |
12798 | die_info *abstract_child = origin_die->child; | |
12799 | while (concrete_child != nullptr || abstract_child != nullptr) | |
12800 | { | |
12801 | if (concrete_child == nullptr | |
12802 | || abstract_child == nullptr | |
12803 | || concrete_child->tag != abstract_child->tag) | |
12804 | { | |
12805 | are_isomorphic = false; | |
12806 | break; | |
12807 | } | |
12808 | ||
12809 | concrete_child = concrete_child->sibling; | |
12810 | abstract_child = abstract_child->sibling; | |
12811 | } | |
12812 | ||
12813 | /* Walk the origin's children in parallel to the concrete children. | |
12814 | This helps match an origin child in case the debug info misses | |
12815 | DW_AT_abstract_origin attributes. Keep in mind that the abstract | |
12816 | origin tree may not have the same tree structure as the concrete | |
12817 | DIE, though. */ | |
12818 | die_info *corresponding_abstract_child | |
12819 | = are_isomorphic ? origin_die->child : nullptr; | |
12820 | ||
791afaa2 | 12821 | std::vector<sect_offset> offsets; |
d389af10 | 12822 | |
3ea89b92 PMR |
12823 | for (child_die = die->child; |
12824 | child_die && child_die->tag; | |
436c571c | 12825 | child_die = child_die->sibling) |
3ea89b92 PMR |
12826 | { |
12827 | struct die_info *child_origin_die; | |
12828 | struct dwarf2_cu *child_origin_cu; | |
12829 | ||
12830 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12831 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12832 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12833 | present in the abstract instance but not referenced in the concrete | |
12834 | one. */ | |
216f72a1 | 12835 | if (child_die->tag == DW_TAG_call_site |
dda83cd7 | 12836 | || child_die->tag == DW_TAG_GNU_call_site) |
34dc0f95 TBA |
12837 | { |
12838 | if (are_isomorphic) | |
12839 | corresponding_abstract_child | |
12840 | = corresponding_abstract_child->sibling; | |
12841 | continue; | |
12842 | } | |
3ea89b92 | 12843 | |
c38f313d DJ |
12844 | /* For each CHILD_DIE, find the corresponding child of |
12845 | ORIGIN_DIE. If there is more than one layer of | |
12846 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12847 | but GCC versions at least through 4.4 generate this (GCC PR | |
12848 | 40573). */ | |
3ea89b92 PMR |
12849 | child_origin_die = child_die; |
12850 | child_origin_cu = cu; | |
c38f313d DJ |
12851 | while (1) |
12852 | { | |
cd02d79d PA |
12853 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12854 | child_origin_cu); | |
c38f313d DJ |
12855 | if (attr == NULL) |
12856 | break; | |
cd02d79d PA |
12857 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12858 | &child_origin_cu); | |
c38f313d DJ |
12859 | } |
12860 | ||
34dc0f95 TBA |
12861 | /* If missing DW_AT_abstract_origin, try the corresponding child |
12862 | of the origin. Clang emits such lexical scopes. */ | |
12863 | if (child_origin_die == child_die | |
12864 | && dwarf2_attr (child_die, DW_AT_abstract_origin, cu) == nullptr | |
12865 | && are_isomorphic | |
12866 | && child_die->tag == DW_TAG_lexical_block) | |
12867 | child_origin_die = corresponding_abstract_child; | |
12868 | ||
d389af10 JK |
12869 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12870 | counterpart may exist. */ | |
c38f313d | 12871 | if (child_origin_die != child_die) |
d389af10 | 12872 | { |
edb3359d DJ |
12873 | if (child_die->tag != child_origin_die->tag |
12874 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12875 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12876 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12877 | "different tags"), |
9d8780f0 SM |
12878 | sect_offset_str (child_die->sect_off), |
12879 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12880 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12881 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12882 | "different parents"), |
9d8780f0 SM |
12883 | sect_offset_str (child_die->sect_off), |
12884 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12885 | else |
791afaa2 | 12886 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12887 | } |
34dc0f95 TBA |
12888 | |
12889 | if (are_isomorphic) | |
12890 | corresponding_abstract_child = corresponding_abstract_child->sibling; | |
d389af10 | 12891 | } |
791afaa2 TT |
12892 | std::sort (offsets.begin (), offsets.end ()); |
12893 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12894 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12895 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12896 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12897 | "to DIE %s as their abstract origin"), |
12898 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12899 | |
791afaa2 | 12900 | offsetp = offsets.data (); |
d389af10 JK |
12901 | origin_child_die = origin_die->child; |
12902 | while (origin_child_die && origin_child_die->tag) | |
12903 | { | |
12904 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12905 | while (offsetp < offsets_end |
9c541725 | 12906 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12907 | offsetp++; |
b64f50a1 | 12908 | if (offsetp >= offsets_end |
9c541725 | 12909 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12910 | { |
adde2bff DE |
12911 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12912 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12913 | This can happen with mutually referenced abstract_origins. | |
12914 | PR 16581. */ | |
12915 | if (!origin_child_die->in_process) | |
12916 | process_die (origin_child_die, origin_cu); | |
d389af10 | 12917 | } |
436c571c | 12918 | origin_child_die = origin_child_die->sibling; |
d389af10 | 12919 | } |
cd02d79d | 12920 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12921 | |
12922 | if (cu != origin_cu) | |
12923 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12924 | } |
12925 | ||
c906108c | 12926 | static void |
e7c27a73 | 12927 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12928 | { |
5e22e966 | 12929 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 12930 | struct gdbarch *gdbarch = objfile->arch (); |
fe978cb0 | 12931 | struct context_stack *newobj; |
c906108c SS |
12932 | CORE_ADDR lowpc; |
12933 | CORE_ADDR highpc; | |
12934 | struct die_info *child_die; | |
edb3359d | 12935 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12936 | const char *name; |
e142c38c | 12937 | CORE_ADDR baseaddr; |
801e3a5b | 12938 | struct block *block; |
edb3359d | 12939 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12940 | std::vector<struct symbol *> template_args; |
34eaf542 | 12941 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12942 | |
12943 | if (inlined_func) | |
12944 | { | |
12945 | /* If we do not have call site information, we can't show the | |
12946 | caller of this inlined function. That's too confusing, so | |
12947 | only use the scope for local variables. */ | |
12948 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12949 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12950 | if (call_line == NULL || call_file == NULL) | |
12951 | { | |
12952 | read_lexical_block_scope (die, cu); | |
12953 | return; | |
12954 | } | |
12955 | } | |
c906108c | 12956 | |
b3b3bada | 12957 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12958 | |
94af9270 | 12959 | name = dwarf2_name (die, cu); |
c906108c | 12960 | |
e8d05480 JB |
12961 | /* Ignore functions with missing or empty names. These are actually |
12962 | illegal according to the DWARF standard. */ | |
12963 | if (name == NULL) | |
12964 | { | |
b98664d3 | 12965 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12966 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12967 | return; |
12968 | } | |
12969 | ||
12970 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12971 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12972 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12973 | { |
ae4d0c03 | 12974 | attr = dwarf2_attr (die, DW_AT_external, cu); |
c45bc3f8 | 12975 | if (attr == nullptr || !attr->as_boolean ()) |
b98664d3 | 12976 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12977 | "for subprogram DIE at %s"), |
12978 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12979 | return; |
12980 | } | |
c906108c | 12981 | |
3e29f34a MR |
12982 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12983 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12984 | |
34eaf542 TT |
12985 | /* If we have any template arguments, then we must allocate a |
12986 | different sort of symbol. */ | |
436c571c | 12987 | for (child_die = die->child; child_die; child_die = child_die->sibling) |
34eaf542 TT |
12988 | { |
12989 | if (child_die->tag == DW_TAG_template_type_param | |
12990 | || child_die->tag == DW_TAG_template_value_param) | |
12991 | { | |
8c14c3a3 | 12992 | templ_func = new (&objfile->objfile_obstack) template_symbol; |
cf724bc9 | 12993 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12994 | break; |
12995 | } | |
12996 | } | |
12997 | ||
702cf3f5 | 12998 | gdb_assert (cu->get_builder () != nullptr); |
c24bdb02 | 12999 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
13000 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13001 | (struct symbol *) templ_func); | |
4c2df51b | 13002 | |
81873cc8 | 13003 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 13004 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
13005 | cu->language); |
13006 | ||
4cecd739 DJ |
13007 | /* If there is a location expression for DW_AT_frame_base, record |
13008 | it. */ | |
e142c38c | 13009 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 13010 | if (attr != nullptr) |
fe978cb0 | 13011 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13012 | |
63e43d3a PMR |
13013 | /* If there is a location for the static link, record it. */ |
13014 | newobj->static_link = NULL; | |
13015 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 13016 | if (attr != nullptr) |
63e43d3a | 13017 | { |
224c3ddb SM |
13018 | newobj->static_link |
13019 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 13020 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
293e7e51 | 13021 | cu->addr_type ()); |
63e43d3a PMR |
13022 | } |
13023 | ||
c24bdb02 | 13024 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13025 | |
639d11d3 | 13026 | if (die->child != NULL) |
c906108c | 13027 | { |
639d11d3 | 13028 | child_die = die->child; |
c906108c SS |
13029 | while (child_die && child_die->tag) |
13030 | { | |
34eaf542 TT |
13031 | if (child_die->tag == DW_TAG_template_type_param |
13032 | || child_die->tag == DW_TAG_template_value_param) | |
13033 | { | |
13034 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13035 | ||
f1078f66 | 13036 | if (arg != NULL) |
2f4732b0 | 13037 | template_args.push_back (arg); |
34eaf542 TT |
13038 | } |
13039 | else | |
13040 | process_die (child_die, cu); | |
436c571c | 13041 | child_die = child_die->sibling; |
c906108c SS |
13042 | } |
13043 | } | |
13044 | ||
d389af10 JK |
13045 | inherit_abstract_dies (die, cu); |
13046 | ||
4a811a97 UW |
13047 | /* If we have a DW_AT_specification, we might need to import using |
13048 | directives from the context of the specification DIE. See the | |
13049 | comment in determine_prefix. */ | |
13050 | if (cu->language == language_cplus | |
13051 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13052 | { | |
13053 | struct dwarf2_cu *spec_cu = cu; | |
13054 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13055 | ||
13056 | while (spec_die) | |
13057 | { | |
13058 | child_die = spec_die->child; | |
13059 | while (child_die && child_die->tag) | |
13060 | { | |
13061 | if (child_die->tag == DW_TAG_imported_module) | |
13062 | process_die (child_die, spec_cu); | |
436c571c | 13063 | child_die = child_die->sibling; |
4a811a97 UW |
13064 | } |
13065 | ||
13066 | /* In some cases, GCC generates specification DIEs that | |
13067 | themselves contain DW_AT_specification attributes. */ | |
13068 | spec_die = die_specification (spec_die, &spec_cu); | |
13069 | } | |
13070 | } | |
13071 | ||
c24bdb02 | 13072 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13073 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13074 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13075 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13076 | |
df8a16a1 | 13077 | /* For C++, set the block's scope. */ |
45280282 IB |
13078 | if ((cu->language == language_cplus |
13079 | || cu->language == language_fortran | |
c44af4eb TT |
13080 | || cu->language == language_d |
13081 | || cu->language == language_rust) | |
4d4ec4e5 | 13082 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13083 | block_set_scope (block, determine_prefix (die, cu), |
13084 | &objfile->objfile_obstack); | |
df8a16a1 | 13085 | |
801e3a5b JB |
13086 | /* If we have address ranges, record them. */ |
13087 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13088 | |
a60f3166 | 13089 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13090 | |
34eaf542 | 13091 | /* Attach template arguments to function. */ |
2f4732b0 | 13092 | if (!template_args.empty ()) |
34eaf542 TT |
13093 | { |
13094 | gdb_assert (templ_func != NULL); | |
13095 | ||
2f4732b0 | 13096 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13097 | templ_func->template_arguments |
dda83cd7 | 13098 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
8d749320 | 13099 | templ_func->n_template_arguments); |
34eaf542 | 13100 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13101 | template_args.data (), |
34eaf542 | 13102 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13103 | |
13104 | /* Make sure that the symtab is set on the new symbols. Even | |
13105 | though they don't appear in this symtab directly, other parts | |
13106 | of gdb assume that symbols do, and this is reasonably | |
13107 | true. */ | |
8634679f | 13108 | for (symbol *sym : template_args) |
3e1d3d8c | 13109 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13110 | } |
13111 | ||
208d8187 JB |
13112 | /* In C++, we can have functions nested inside functions (e.g., when |
13113 | a function declares a class that has methods). This means that | |
13114 | when we finish processing a function scope, we may need to go | |
13115 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13116 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13117 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13118 | |
921e78cf JB |
13119 | /* If we've finished processing a top-level function, subsequent |
13120 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13121 | if (cu->get_builder ()->outermost_context_p ()) |
13122 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13123 | } |
13124 | ||
13125 | /* Process all the DIES contained within a lexical block scope. Start | |
13126 | a new scope, process the dies, and then close the scope. */ | |
13127 | ||
13128 | static void | |
e7c27a73 | 13129 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13130 | { |
5e22e966 | 13131 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 13132 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
13133 | CORE_ADDR lowpc, highpc; |
13134 | struct die_info *child_die; | |
e142c38c DJ |
13135 | CORE_ADDR baseaddr; |
13136 | ||
b3b3bada | 13137 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13138 | |
13139 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13140 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13141 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13142 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13143 | describe ranges. */ |
e385593e JK |
13144 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13145 | { | |
13146 | case PC_BOUNDS_NOT_PRESENT: | |
13147 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13148 | there was no wrapping by that DW_TAG_lexical_block. | |
13149 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13150 | for (child_die = die->child; | |
13151 | child_die != NULL && child_die->tag; | |
436c571c | 13152 | child_die = child_die->sibling) |
4f7bc5ed TT |
13153 | { |
13154 | /* We might already be processing this DIE. This can happen | |
13155 | in an unusual circumstance -- where a subroutine A | |
13156 | appears lexically in another subroutine B, but A actually | |
13157 | inlines B. The recursion is broken here, rather than in | |
13158 | inherit_abstract_dies, because it seems better to simply | |
13159 | drop concrete children here. */ | |
13160 | if (!child_die->in_process) | |
13161 | process_die (child_die, cu); | |
13162 | } | |
e385593e JK |
13163 | return; |
13164 | case PC_BOUNDS_INVALID: | |
13165 | return; | |
13166 | } | |
3e29f34a MR |
13167 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13168 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13169 | |
c24bdb02 | 13170 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13171 | if (die->child != NULL) |
c906108c | 13172 | { |
639d11d3 | 13173 | child_die = die->child; |
c906108c SS |
13174 | while (child_die && child_die->tag) |
13175 | { | |
e7c27a73 | 13176 | process_die (child_die, cu); |
436c571c | 13177 | child_die = child_die->sibling; |
c906108c SS |
13178 | } |
13179 | } | |
3ea89b92 | 13180 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13181 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13182 | |
c24bdb02 KS |
13183 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13184 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13185 | { |
801e3a5b | 13186 | struct block *block |
dda83cd7 | 13187 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13188 | cstk.start_addr, highpc); |
801e3a5b JB |
13189 | |
13190 | /* Note that recording ranges after traversing children, as we | |
dda83cd7 SM |
13191 | do here, means that recording a parent's ranges entails |
13192 | walking across all its children's ranges as they appear in | |
13193 | the address map, which is quadratic behavior. | |
13194 | ||
13195 | It would be nicer to record the parent's ranges before | |
13196 | traversing its children, simply overriding whatever you find | |
13197 | there. But since we don't even decide whether to create a | |
13198 | block until after we've traversed its children, that's hard | |
13199 | to do. */ | |
801e3a5b | 13200 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
c906108c | 13201 | } |
c24bdb02 KS |
13202 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13203 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13204 | } |
13205 | ||
216f72a1 | 13206 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13207 | |
13208 | static void | |
13209 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13210 | { | |
5e22e966 | 13211 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 13212 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 13213 | struct gdbarch *gdbarch = objfile->arch (); |
96408a79 SA |
13214 | CORE_ADDR pc, baseaddr; |
13215 | struct attribute *attr; | |
13216 | struct call_site *call_site, call_site_local; | |
13217 | void **slot; | |
13218 | int nparams; | |
13219 | struct die_info *child_die; | |
13220 | ||
b3b3bada | 13221 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13222 | |
216f72a1 JK |
13223 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13224 | if (attr == NULL) | |
13225 | { | |
13226 | /* This was a pre-DWARF-5 GNU extension alias | |
13227 | for DW_AT_call_return_pc. */ | |
13228 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13229 | } | |
96408a79 SA |
13230 | if (!attr) |
13231 | { | |
b98664d3 | 13232 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13233 | "DIE %s [in module %s]"), |
13234 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13235 | return; |
13236 | } | |
95f982e5 | 13237 | pc = attr->as_address () + baseaddr; |
3e29f34a | 13238 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13239 | |
13240 | if (cu->call_site_htab == NULL) | |
13241 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13242 | NULL, &objfile->objfile_obstack, | |
13243 | hashtab_obstack_allocate, NULL); | |
13244 | call_site_local.pc = pc; | |
13245 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13246 | if (*slot != NULL) | |
13247 | { | |
b98664d3 | 13248 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13249 | "DIE %s [in module %s]"), |
13250 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13251 | objfile_name (objfile)); |
96408a79 SA |
13252 | return; |
13253 | } | |
13254 | ||
13255 | /* Count parameters at the caller. */ | |
13256 | ||
13257 | nparams = 0; | |
13258 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 13259 | child_die = child_die->sibling) |
96408a79 | 13260 | { |
216f72a1 | 13261 | if (child_die->tag != DW_TAG_call_site_parameter |
dda83cd7 | 13262 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
96408a79 | 13263 | { |
b98664d3 | 13264 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13265 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13266 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13267 | objfile_name (objfile)); |
96408a79 SA |
13268 | continue; |
13269 | } | |
13270 | ||
13271 | nparams++; | |
13272 | } | |
13273 | ||
224c3ddb SM |
13274 | call_site |
13275 | = ((struct call_site *) | |
13276 | obstack_alloc (&objfile->objfile_obstack, | |
13277 | sizeof (*call_site) | |
13278 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13279 | *slot = call_site; |
13280 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13281 | call_site->pc = pc; | |
13282 | ||
216f72a1 JK |
13283 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13284 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13285 | { |
13286 | struct die_info *func_die; | |
13287 | ||
13288 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13289 | for (func_die = die->parent; | |
13290 | func_die && func_die->tag != DW_TAG_subprogram | |
13291 | && func_die->tag != DW_TAG_subroutine_type; | |
13292 | func_die = func_die->parent); | |
13293 | ||
216f72a1 JK |
13294 | /* DW_AT_call_all_calls is a superset |
13295 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13296 | if (func_die |
dda83cd7 SM |
13297 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
13298 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
216f72a1 | 13299 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13300 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13301 | { | |
13302 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13303 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13304 | both the initial caller containing the real return address PC and | |
13305 | the final callee containing the current PC of a chain of tail | |
13306 | calls do not need to have the tail call list complete. But any | |
13307 | function candidate for a virtual tail call frame searched via | |
13308 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13309 | determined unambiguously. */ | |
13310 | } | |
13311 | else | |
13312 | { | |
13313 | struct type *func_type = NULL; | |
13314 | ||
13315 | if (func_die) | |
13316 | func_type = get_die_type (func_die, cu); | |
13317 | if (func_type != NULL) | |
13318 | { | |
78134374 | 13319 | gdb_assert (func_type->code () == TYPE_CODE_FUNC); |
96408a79 SA |
13320 | |
13321 | /* Enlist this call site to the function. */ | |
13322 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13323 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13324 | } | |
13325 | else | |
b98664d3 | 13326 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13327 | "DIE %s [in module %s]"), |
13328 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13329 | } |
13330 | } | |
13331 | ||
216f72a1 JK |
13332 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13333 | if (attr == NULL) | |
13334 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13335 | if (attr == NULL) | |
13336 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13337 | if (attr == NULL) |
216f72a1 JK |
13338 | { |
13339 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13340 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13341 | } | |
96408a79 | 13342 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
9d2246fc | 13343 | if (!attr || (attr->form_is_block () && attr->as_block ()->size == 0)) |
96408a79 | 13344 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13345 | else if (attr->form_is_block ()) |
96408a79 SA |
13346 | { |
13347 | struct dwarf2_locexpr_baton *dlbaton; | |
9d2246fc | 13348 | struct dwarf_block *block = attr->as_block (); |
96408a79 | 13349 | |
8d749320 | 13350 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
9d2246fc TT |
13351 | dlbaton->data = block->data; |
13352 | dlbaton->size = block->size; | |
a50264ba | 13353 | dlbaton->per_objfile = per_objfile; |
96408a79 SA |
13354 | dlbaton->per_cu = cu->per_cu; |
13355 | ||
13356 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13357 | } | |
cd6c91b4 | 13358 | else if (attr->form_is_ref ()) |
96408a79 | 13359 | { |
96408a79 SA |
13360 | struct dwarf2_cu *target_cu = cu; |
13361 | struct die_info *target_die; | |
13362 | ||
ac9ec31b | 13363 | target_die = follow_die_ref (die, attr, &target_cu); |
5e22e966 | 13364 | gdb_assert (target_cu->per_objfile->objfile == objfile); |
96408a79 SA |
13365 | if (die_is_declaration (target_die, target_cu)) |
13366 | { | |
7d45c7c3 | 13367 | const char *target_physname; |
9112db09 JK |
13368 | |
13369 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13370 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13371 | if (target_physname == NULL) |
9112db09 | 13372 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13373 | if (target_physname == NULL) |
b98664d3 | 13374 | complaint (_("DW_AT_call_target target DIE has invalid " |
dda83cd7 | 13375 | "physname, for referencing DIE %s [in module %s]"), |
9d8780f0 | 13376 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
96408a79 | 13377 | else |
7d455152 | 13378 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13379 | } |
13380 | else | |
13381 | { | |
13382 | CORE_ADDR lowpc; | |
13383 | ||
13384 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13385 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13386 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13387 | complaint (_("DW_AT_call_target target DIE has invalid " |
dda83cd7 | 13388 | "low pc, for referencing DIE %s [in module %s]"), |
9d8780f0 | 13389 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
96408a79 | 13390 | else |
3e29f34a MR |
13391 | { |
13392 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13393 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13394 | } | |
96408a79 SA |
13395 | } |
13396 | } | |
13397 | else | |
b98664d3 | 13398 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13399 | "block nor reference, for DIE %s [in module %s]"), |
13400 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13401 | |
13402 | call_site->per_cu = cu->per_cu; | |
9f47c707 | 13403 | call_site->per_objfile = per_objfile; |
96408a79 SA |
13404 | |
13405 | for (child_die = die->child; | |
13406 | child_die && child_die->tag; | |
436c571c | 13407 | child_die = child_die->sibling) |
96408a79 | 13408 | { |
96408a79 | 13409 | struct call_site_parameter *parameter; |
1788b2d3 | 13410 | struct attribute *loc, *origin; |
96408a79 | 13411 | |
216f72a1 | 13412 | if (child_die->tag != DW_TAG_call_site_parameter |
dda83cd7 | 13413 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
96408a79 SA |
13414 | { |
13415 | /* Already printed the complaint above. */ | |
13416 | continue; | |
13417 | } | |
13418 | ||
13419 | gdb_assert (call_site->parameter_count < nparams); | |
13420 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13421 | ||
1788b2d3 JK |
13422 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13423 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13424 | register is contained in DW_AT_call_value. */ |
96408a79 | 13425 | |
24c5c679 | 13426 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13427 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13428 | if (origin == NULL) | |
13429 | { | |
13430 | /* This was a pre-DWARF-5 GNU extension alias | |
13431 | for DW_AT_call_parameter. */ | |
13432 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13433 | } | |
cd6c91b4 | 13434 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13435 | { |
1788b2d3 | 13436 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 | 13437 | |
0826b30a | 13438 | sect_offset sect_off = origin->get_ref_die_offset (); |
4057dfde | 13439 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13440 | { |
13441 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13442 | binding can be done only inside one CU. Such referenced DIE | |
13443 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13444 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13445 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13446 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13447 | objfile_name (objfile)); |
d76b7dbc JK |
13448 | continue; |
13449 | } | |
9c541725 PA |
13450 | parameter->u.param_cu_off |
13451 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13452 | } |
4fc6c0d5 | 13453 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13454 | { |
b98664d3 | 13455 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13456 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13457 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13458 | continue; |
13459 | } | |
24c5c679 | 13460 | else |
96408a79 | 13461 | { |
9d2246fc TT |
13462 | struct dwarf_block *block = loc->as_block (); |
13463 | ||
24c5c679 | 13464 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
9d2246fc | 13465 | (block->data, &block->data[block->size]); |
24c5c679 JK |
13466 | if (parameter->u.dwarf_reg != -1) |
13467 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
9d2246fc TT |
13468 | else if (dwarf_block_to_sp_offset (gdbarch, block->data, |
13469 | &block->data[block->size], | |
24c5c679 JK |
13470 | ¶meter->u.fb_offset)) |
13471 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13472 | else | |
13473 | { | |
b98664d3 | 13474 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13475 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13476 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13477 | "[in module %s]"), |
9d8780f0 | 13478 | sect_offset_str (child_die->sect_off), |
9c541725 | 13479 | objfile_name (objfile)); |
24c5c679 JK |
13480 | continue; |
13481 | } | |
96408a79 SA |
13482 | } |
13483 | ||
216f72a1 JK |
13484 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13485 | if (attr == NULL) | |
13486 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13487 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13488 | { |
b98664d3 | 13489 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13490 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13491 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13492 | objfile_name (objfile)); |
96408a79 SA |
13493 | continue; |
13494 | } | |
9d2246fc TT |
13495 | |
13496 | struct dwarf_block *block = attr->as_block (); | |
13497 | parameter->value = block->data; | |
13498 | parameter->value_size = block->size; | |
96408a79 SA |
13499 | |
13500 | /* Parameters are not pre-cleared by memset above. */ | |
13501 | parameter->data_value = NULL; | |
13502 | parameter->data_value_size = 0; | |
13503 | call_site->parameter_count++; | |
13504 | ||
216f72a1 JK |
13505 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13506 | if (attr == NULL) | |
13507 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13508 | if (attr != nullptr) |
96408a79 | 13509 | { |
4fc6c0d5 | 13510 | if (!attr->form_is_block ()) |
b98664d3 | 13511 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
13512 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13513 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13514 | objfile_name (objfile)); |
96408a79 SA |
13515 | else |
13516 | { | |
9d2246fc TT |
13517 | block = attr->as_block (); |
13518 | parameter->data_value = block->data; | |
13519 | parameter->data_value_size = block->size; | |
96408a79 SA |
13520 | } |
13521 | } | |
13522 | } | |
13523 | } | |
13524 | ||
71a3c369 TT |
13525 | /* Helper function for read_variable. If DIE represents a virtual |
13526 | table, then return the type of the concrete object that is | |
13527 | associated with the virtual table. Otherwise, return NULL. */ | |
13528 | ||
13529 | static struct type * | |
13530 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13531 | { | |
13532 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13533 | if (attr == NULL) | |
13534 | return NULL; | |
13535 | ||
13536 | /* Find the type DIE. */ | |
13537 | struct die_info *type_die = NULL; | |
13538 | struct dwarf2_cu *type_cu = cu; | |
13539 | ||
cd6c91b4 | 13540 | if (attr->form_is_ref ()) |
71a3c369 TT |
13541 | type_die = follow_die_ref (die, attr, &type_cu); |
13542 | if (type_die == NULL) | |
13543 | return NULL; | |
13544 | ||
13545 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13546 | return NULL; | |
13547 | return die_containing_type (type_die, type_cu); | |
13548 | } | |
13549 | ||
13550 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13551 | ||
13552 | static void | |
13553 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13554 | { | |
13555 | struct rust_vtable_symbol *storage = NULL; | |
13556 | ||
13557 | if (cu->language == language_rust) | |
13558 | { | |
13559 | struct type *containing_type = rust_containing_type (die, cu); | |
13560 | ||
13561 | if (containing_type != NULL) | |
13562 | { | |
5e22e966 | 13563 | struct objfile *objfile = cu->per_objfile->objfile; |
71a3c369 | 13564 | |
8c14c3a3 | 13565 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol; |
71a3c369 | 13566 | storage->concrete_type = containing_type; |
cf724bc9 | 13567 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13568 | } |
13569 | } | |
13570 | ||
e4a62c65 TV |
13571 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13572 | struct attribute *abstract_origin | |
13573 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13574 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13575 | if (res == NULL && loc && abstract_origin) | |
13576 | { | |
13577 | /* We have a variable without a name, but with a location and an abstract | |
13578 | origin. This may be a concrete instance of an abstract variable | |
13579 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13580 | later. */ | |
13581 | struct dwarf2_cu *origin_cu = cu; | |
13582 | struct die_info *origin_die | |
13583 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
5e22e966 SM |
13584 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13585 | per_objfile->per_bfd->abstract_to_concrete | |
13586 | [origin_die->sect_off].push_back (die->sect_off); | |
e4a62c65 | 13587 | } |
71a3c369 TT |
13588 | } |
13589 | ||
43988095 JK |
13590 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13591 | reading .debug_rnglists. | |
13592 | Callback's type should be: | |
13593 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13594 | Return true if the attributes are present and valid, otherwise, | |
13595 | return false. */ | |
13596 | ||
13597 | template <typename Callback> | |
13598 | static bool | |
13599 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
d0ce17d8 | 13600 | dwarf_tag tag, Callback &&callback) |
43988095 | 13601 | { |
976ca316 SM |
13602 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13603 | struct objfile *objfile = per_objfile->objfile; | |
43988095 | 13604 | bfd *obfd = objfile->obfd; |
43988095 | 13605 | /* Base address selection entry. */ |
2b24b6e4 | 13606 | gdb::optional<CORE_ADDR> base; |
43988095 | 13607 | const gdb_byte *buffer; |
43988095 JK |
13608 | CORE_ADDR baseaddr; |
13609 | bool overflow = false; | |
d0ce17d8 CT |
13610 | ULONGEST addr_index; |
13611 | struct dwarf2_section_info *rnglists_section; | |
43988095 | 13612 | |
43988095 | 13613 | base = cu->base_address; |
d0ce17d8 CT |
13614 | rnglists_section = cu_debug_rnglists_section (cu, tag); |
13615 | rnglists_section->read (objfile); | |
43988095 | 13616 | |
d0ce17d8 | 13617 | if (offset >= rnglists_section->size) |
43988095 | 13618 | { |
b98664d3 | 13619 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13620 | offset); |
13621 | return false; | |
13622 | } | |
d0ce17d8 | 13623 | buffer = rnglists_section->buffer + offset; |
43988095 | 13624 | |
b3b3bada | 13625 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13626 | |
13627 | while (1) | |
13628 | { | |
7814882a JK |
13629 | /* Initialize it due to a false compiler warning. */ |
13630 | CORE_ADDR range_beginning = 0, range_end = 0; | |
d0ce17d8 CT |
13631 | const gdb_byte *buf_end = (rnglists_section->buffer |
13632 | + rnglists_section->size); | |
43988095 JK |
13633 | unsigned int bytes_read; |
13634 | ||
13635 | if (buffer == buf_end) | |
13636 | { | |
13637 | overflow = true; | |
13638 | break; | |
13639 | } | |
13640 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13641 | switch (rlet) | |
13642 | { | |
13643 | case DW_RLE_end_of_list: | |
13644 | break; | |
13645 | case DW_RLE_base_address: | |
13646 | if (buffer + cu->header.addr_size > buf_end) | |
13647 | { | |
13648 | overflow = true; | |
13649 | break; | |
13650 | } | |
c8a7a66f | 13651 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13652 | buffer += bytes_read; |
13653 | break; | |
dda83cd7 SM |
13654 | case DW_RLE_base_addressx: |
13655 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13656 | buffer += bytes_read; | |
13657 | base = read_addr_index (cu, addr_index); | |
13658 | break; | |
43988095 JK |
13659 | case DW_RLE_start_length: |
13660 | if (buffer + cu->header.addr_size > buf_end) | |
13661 | { | |
13662 | overflow = true; | |
13663 | break; | |
13664 | } | |
c8a7a66f TT |
13665 | range_beginning = cu->header.read_address (obfd, buffer, |
13666 | &bytes_read); | |
43988095 JK |
13667 | buffer += bytes_read; |
13668 | range_end = (range_beginning | |
13669 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13670 | buffer += bytes_read; | |
13671 | if (buffer > buf_end) | |
13672 | { | |
13673 | overflow = true; | |
13674 | break; | |
13675 | } | |
13676 | break; | |
d0ce17d8 | 13677 | case DW_RLE_startx_length: |
dda83cd7 SM |
13678 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
13679 | buffer += bytes_read; | |
13680 | range_beginning = read_addr_index (cu, addr_index); | |
13681 | if (buffer > buf_end) | |
13682 | { | |
13683 | overflow = true; | |
13684 | break; | |
13685 | } | |
13686 | range_end = (range_beginning | |
13687 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13688 | buffer += bytes_read; | |
13689 | break; | |
43988095 JK |
13690 | case DW_RLE_offset_pair: |
13691 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13692 | buffer += bytes_read; | |
13693 | if (buffer > buf_end) | |
13694 | { | |
13695 | overflow = true; | |
13696 | break; | |
13697 | } | |
13698 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13699 | buffer += bytes_read; | |
13700 | if (buffer > buf_end) | |
13701 | { | |
13702 | overflow = true; | |
13703 | break; | |
13704 | } | |
13705 | break; | |
13706 | case DW_RLE_start_end: | |
13707 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13708 | { | |
13709 | overflow = true; | |
13710 | break; | |
13711 | } | |
c8a7a66f TT |
13712 | range_beginning = cu->header.read_address (obfd, buffer, |
13713 | &bytes_read); | |
43988095 | 13714 | buffer += bytes_read; |
c8a7a66f | 13715 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13716 | buffer += bytes_read; |
13717 | break; | |
d0ce17d8 | 13718 | case DW_RLE_startx_endx: |
dda83cd7 SM |
13719 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
13720 | buffer += bytes_read; | |
13721 | range_beginning = read_addr_index (cu, addr_index); | |
13722 | if (buffer > buf_end) | |
13723 | { | |
13724 | overflow = true; | |
13725 | break; | |
13726 | } | |
13727 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13728 | buffer += bytes_read; | |
13729 | range_end = read_addr_index (cu, addr_index); | |
13730 | break; | |
43988095 | 13731 | default: |
b98664d3 | 13732 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13733 | return false; |
13734 | } | |
13735 | if (rlet == DW_RLE_end_of_list || overflow) | |
13736 | break; | |
13737 | if (rlet == DW_RLE_base_address) | |
13738 | continue; | |
13739 | ||
43988095 JK |
13740 | if (range_beginning > range_end) |
13741 | { | |
13742 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13743 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13744 | return false; |
13745 | } | |
13746 | ||
13747 | /* Empty range entries have no effect. */ | |
13748 | if (range_beginning == range_end) | |
13749 | continue; | |
13750 | ||
d0ce17d8 CT |
13751 | /* Only DW_RLE_offset_pair needs the base address added. */ |
13752 | if (rlet == DW_RLE_offset_pair) | |
13753 | { | |
13754 | if (!base.has_value ()) | |
13755 | { | |
13756 | /* We have no valid base address for the DW_RLE_offset_pair. */ | |
13757 | complaint (_("Invalid .debug_rnglists data (no base address for " | |
13758 | "DW_RLE_offset_pair)")); | |
13759 | return false; | |
13760 | } | |
13761 | ||
13762 | range_beginning += *base; | |
13763 | range_end += *base; | |
13764 | } | |
43988095 JK |
13765 | |
13766 | /* A not-uncommon case of bad debug info. | |
13767 | Don't pollute the addrmap with bad data. */ | |
13768 | if (range_beginning + baseaddr == 0 | |
976ca316 | 13769 | && !per_objfile->per_bfd->has_section_at_zero) |
43988095 | 13770 | { |
b98664d3 | 13771 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
13772 | " [in module %s]"), objfile_name (objfile)); |
13773 | continue; | |
13774 | } | |
13775 | ||
13776 | callback (range_beginning, range_end); | |
13777 | } | |
13778 | ||
13779 | if (overflow) | |
13780 | { | |
b98664d3 | 13781 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13782 | "for DW_AT_ranges attribute"), |
13783 | offset); | |
13784 | return false; | |
13785 | } | |
13786 | ||
13787 | return true; | |
13788 | } | |
13789 | ||
13790 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13791 | Callback's type should be: | |
13792 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13793 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13794 | |
43988095 | 13795 | template <typename Callback> |
43039443 | 13796 | static int |
d0ce17d8 | 13797 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, dwarf_tag tag, |
43988095 | 13798 | Callback &&callback) |
43039443 | 13799 | { |
5e22e966 SM |
13800 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13801 | struct objfile *objfile = per_objfile->objfile; | |
43039443 JK |
13802 | struct comp_unit_head *cu_header = &cu->header; |
13803 | bfd *obfd = objfile->obfd; | |
13804 | unsigned int addr_size = cu_header->addr_size; | |
13805 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13806 | /* Base address selection entry. */ | |
2b24b6e4 | 13807 | gdb::optional<CORE_ADDR> base; |
43039443 | 13808 | unsigned int dummy; |
d521ce57 | 13809 | const gdb_byte *buffer; |
ff013f42 | 13810 | CORE_ADDR baseaddr; |
43039443 | 13811 | |
43988095 | 13812 | if (cu_header->version >= 5) |
d0ce17d8 | 13813 | return dwarf2_rnglists_process (offset, cu, tag, callback); |
43988095 | 13814 | |
d00adf39 | 13815 | base = cu->base_address; |
43039443 | 13816 | |
5e22e966 SM |
13817 | per_objfile->per_bfd->ranges.read (objfile); |
13818 | if (offset >= per_objfile->per_bfd->ranges.size) | |
43039443 | 13819 | { |
b98664d3 | 13820 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13821 | offset); |
13822 | return 0; | |
13823 | } | |
5e22e966 | 13824 | buffer = per_objfile->per_bfd->ranges.buffer + offset; |
43039443 | 13825 | |
b3b3bada | 13826 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13827 | |
43039443 JK |
13828 | while (1) |
13829 | { | |
13830 | CORE_ADDR range_beginning, range_end; | |
13831 | ||
c8a7a66f | 13832 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13833 | buffer += addr_size; |
c8a7a66f | 13834 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13835 | buffer += addr_size; |
13836 | offset += 2 * addr_size; | |
13837 | ||
13838 | /* An end of list marker is a pair of zero addresses. */ | |
13839 | if (range_beginning == 0 && range_end == 0) | |
13840 | /* Found the end of list entry. */ | |
13841 | break; | |
13842 | ||
13843 | /* Each base address selection entry is a pair of 2 values. | |
13844 | The first is the largest possible address, the second is | |
13845 | the base address. Check for a base address here. */ | |
13846 | if ((range_beginning & mask) == mask) | |
13847 | { | |
28d2bfb9 AB |
13848 | /* If we found the largest possible address, then we already |
13849 | have the base address in range_end. */ | |
13850 | base = range_end; | |
43039443 JK |
13851 | continue; |
13852 | } | |
13853 | ||
2b24b6e4 | 13854 | if (!base.has_value ()) |
43039443 JK |
13855 | { |
13856 | /* We have no valid base address for the ranges | |
13857 | data. */ | |
b98664d3 | 13858 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13859 | return 0; |
13860 | } | |
13861 | ||
9277c30c UW |
13862 | if (range_beginning > range_end) |
13863 | { | |
13864 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13865 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13866 | return 0; |
13867 | } | |
13868 | ||
13869 | /* Empty range entries have no effect. */ | |
13870 | if (range_beginning == range_end) | |
13871 | continue; | |
13872 | ||
2b24b6e4 TT |
13873 | range_beginning += *base; |
13874 | range_end += *base; | |
43039443 | 13875 | |
01093045 DE |
13876 | /* A not-uncommon case of bad debug info. |
13877 | Don't pollute the addrmap with bad data. */ | |
13878 | if (range_beginning + baseaddr == 0 | |
5e22e966 | 13879 | && !per_objfile->per_bfd->has_section_at_zero) |
01093045 | 13880 | { |
b98664d3 | 13881 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13882 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13883 | continue; |
13884 | } | |
13885 | ||
5f46c5a5 JK |
13886 | callback (range_beginning, range_end); |
13887 | } | |
13888 | ||
13889 | return 1; | |
13890 | } | |
13891 | ||
13892 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13893 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
efd7398e | 13894 | If RANGES_PST is not NULL we should set up the `psymtabs_addrmap'. */ |
5f46c5a5 JK |
13895 | |
13896 | static int | |
13897 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13898 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
d0ce17d8 | 13899 | dwarf2_psymtab *ranges_pst, dwarf_tag tag) |
5f46c5a5 | 13900 | { |
5e22e966 | 13901 | struct objfile *objfile = cu->per_objfile->objfile; |
84685904 | 13902 | dwarf2_per_bfd *per_bfd = cu->per_objfile->per_bfd; |
08feed99 | 13903 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 13904 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13905 | int low_set = 0; |
13906 | CORE_ADDR low = 0; | |
13907 | CORE_ADDR high = 0; | |
13908 | int retval; | |
13909 | ||
d0ce17d8 | 13910 | retval = dwarf2_ranges_process (offset, cu, tag, |
5f46c5a5 JK |
13911 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) |
13912 | { | |
9277c30c | 13913 | if (ranges_pst != NULL) |
3e29f34a MR |
13914 | { |
13915 | CORE_ADDR lowpc; | |
13916 | CORE_ADDR highpc; | |
13917 | ||
79748972 TT |
13918 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13919 | range_beginning + baseaddr) | |
13920 | - baseaddr); | |
13921 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13922 | range_end + baseaddr) | |
13923 | - baseaddr); | |
84685904 | 13924 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
d320c2b5 | 13925 | lowpc, highpc - 1, ranges_pst); |
3e29f34a | 13926 | } |
ff013f42 | 13927 | |
43039443 JK |
13928 | /* FIXME: This is recording everything as a low-high |
13929 | segment of consecutive addresses. We should have a | |
13930 | data structure for discontiguous block ranges | |
13931 | instead. */ | |
13932 | if (! low_set) | |
13933 | { | |
13934 | low = range_beginning; | |
13935 | high = range_end; | |
13936 | low_set = 1; | |
13937 | } | |
13938 | else | |
13939 | { | |
13940 | if (range_beginning < low) | |
13941 | low = range_beginning; | |
13942 | if (range_end > high) | |
13943 | high = range_end; | |
13944 | } | |
5f46c5a5 JK |
13945 | }); |
13946 | if (!retval) | |
13947 | return 0; | |
43039443 JK |
13948 | |
13949 | if (! low_set) | |
13950 | /* If the first entry is an end-of-list marker, the range | |
13951 | describes an empty scope, i.e. no instructions. */ | |
13952 | return 0; | |
13953 | ||
13954 | if (low_return) | |
13955 | *low_return = low; | |
13956 | if (high_return) | |
13957 | *high_return = high; | |
13958 | return 1; | |
13959 | } | |
13960 | ||
3a2b436a JK |
13961 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13962 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13963 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13964 | |
3a2b436a | 13965 | static enum pc_bounds_kind |
af34e669 | 13966 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13967 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13968 | dwarf2_psymtab *pst) |
c906108c | 13969 | { |
976ca316 | 13970 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
c906108c | 13971 | struct attribute *attr; |
91da1414 | 13972 | struct attribute *attr_high; |
af34e669 DJ |
13973 | CORE_ADDR low = 0; |
13974 | CORE_ADDR high = 0; | |
e385593e | 13975 | enum pc_bounds_kind ret; |
c906108c | 13976 | |
91da1414 MW |
13977 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13978 | if (attr_high) | |
af34e669 | 13979 | { |
e142c38c | 13980 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13981 | if (attr != nullptr) |
dda83cd7 | 13982 | { |
95f982e5 TT |
13983 | low = attr->as_address (); |
13984 | high = attr_high->as_address (); | |
cd6c91b4 | 13985 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 13986 | high += low; |
91da1414 | 13987 | } |
af34e669 DJ |
13988 | else |
13989 | /* Found high w/o low attribute. */ | |
e385593e | 13990 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13991 | |
13992 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13993 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13994 | } |
c906108c | 13995 | else |
af34e669 | 13996 | { |
e142c38c | 13997 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
529908cb | 13998 | if (attr != nullptr && attr->form_is_unsigned ()) |
af34e669 | 13999 | { |
2b0c7f41 SM |
14000 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
14001 | on DWARF version). */ | |
14002 | ULONGEST ranges_offset = attr->as_unsigned (); | |
14003 | ||
14004 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add | |
14005 | this value. */ | |
14006 | if (die->tag != DW_TAG_compile_unit) | |
14007 | ranges_offset += cu->gnu_ranges_base; | |
2e3cf129 | 14008 | |
af34e669 | 14009 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14010 | .debug_ranges section. */ |
d0ce17d8 CT |
14011 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst, |
14012 | die->tag)) | |
e385593e | 14013 | return PC_BOUNDS_INVALID; |
43039443 | 14014 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14015 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14016 | } |
e385593e JK |
14017 | else |
14018 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14019 | } |
c906108c | 14020 | |
48fbe735 | 14021 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14022 | if (high <= low) |
e385593e | 14023 | return PC_BOUNDS_INVALID; |
c906108c SS |
14024 | |
14025 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14026 | eliminate duplicate copies of functions and vtables and such. | |
14027 | The linker will arbitrarily choose one and discard the others. | |
14028 | The AT_*_pc values for such functions refer to local labels in | |
14029 | these sections. If the section from that file was discarded, the | |
14030 | labels are not in the output, so the relocs get a value of 0. | |
14031 | If this is a discarded function, mark the pc bounds as invalid, | |
14032 | so that GDB will ignore it. */ | |
976ca316 | 14033 | if (low == 0 && !per_objfile->per_bfd->has_section_at_zero) |
e385593e | 14034 | return PC_BOUNDS_INVALID; |
c906108c SS |
14035 | |
14036 | *lowpc = low; | |
96408a79 SA |
14037 | if (highpc) |
14038 | *highpc = high; | |
af34e669 | 14039 | return ret; |
c906108c SS |
14040 | } |
14041 | ||
b084d499 JB |
14042 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14043 | its low and high PC addresses. Do nothing if these addresses could not | |
14044 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14045 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14046 | ||
14047 | static void | |
14048 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
dda83cd7 SM |
14049 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
14050 | struct dwarf2_cu *cu) | |
b084d499 JB |
14051 | { |
14052 | CORE_ADDR low, high; | |
14053 | struct die_info *child = die->child; | |
14054 | ||
e385593e | 14055 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14056 | { |
325fac50 PA |
14057 | *lowpc = std::min (*lowpc, low); |
14058 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14059 | } |
14060 | ||
14061 | /* If the language does not allow nested subprograms (either inside | |
14062 | subprograms or lexical blocks), we're done. */ | |
14063 | if (cu->language != language_ada) | |
14064 | return; | |
6e70227d | 14065 | |
b084d499 JB |
14066 | /* Check all the children of the given DIE. If it contains nested |
14067 | subprograms, then check their pc bounds. Likewise, we need to | |
14068 | check lexical blocks as well, as they may also contain subprogram | |
14069 | definitions. */ | |
14070 | while (child && child->tag) | |
14071 | { | |
14072 | if (child->tag == DW_TAG_subprogram | |
dda83cd7 SM |
14073 | || child->tag == DW_TAG_lexical_block) |
14074 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
436c571c | 14075 | child = child->sibling; |
b084d499 JB |
14076 | } |
14077 | } | |
14078 | ||
fae299cd DC |
14079 | /* Get the low and high pc's represented by the scope DIE, and store |
14080 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14081 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14082 | ||
14083 | static void | |
14084 | get_scope_pc_bounds (struct die_info *die, | |
14085 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14086 | struct dwarf2_cu *cu) | |
14087 | { | |
14088 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14089 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14090 | CORE_ADDR current_low, current_high; | |
14091 | ||
3a2b436a | 14092 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14093 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14094 | { |
14095 | best_low = current_low; | |
14096 | best_high = current_high; | |
14097 | } | |
14098 | else | |
14099 | { | |
14100 | struct die_info *child = die->child; | |
14101 | ||
14102 | while (child && child->tag) | |
14103 | { | |
14104 | switch (child->tag) { | |
14105 | case DW_TAG_subprogram: | |
dda83cd7 | 14106 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14107 | break; |
14108 | case DW_TAG_namespace: | |
f55ee35c | 14109 | case DW_TAG_module: |
fae299cd DC |
14110 | /* FIXME: carlton/2004-01-16: Should we do this for |
14111 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14112 | that current GCC's always emit the DIEs corresponding | |
14113 | to definitions of methods of classes as children of a | |
14114 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14115 | the DIEs giving the declarations, which could be | |
14116 | anywhere). But I don't see any reason why the | |
14117 | standards says that they have to be there. */ | |
14118 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14119 | ||
14120 | if (current_low != ((CORE_ADDR) -1)) | |
14121 | { | |
325fac50 PA |
14122 | best_low = std::min (best_low, current_low); |
14123 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14124 | } |
14125 | break; | |
14126 | default: | |
0963b4bd | 14127 | /* Ignore. */ |
fae299cd DC |
14128 | break; |
14129 | } | |
14130 | ||
436c571c | 14131 | child = child->sibling; |
fae299cd DC |
14132 | } |
14133 | } | |
14134 | ||
14135 | *lowpc = best_low; | |
14136 | *highpc = best_high; | |
14137 | } | |
14138 | ||
801e3a5b JB |
14139 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14140 | in DIE. */ | |
380bca97 | 14141 | |
801e3a5b JB |
14142 | static void |
14143 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
dda83cd7 | 14144 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) |
801e3a5b | 14145 | { |
5e22e966 | 14146 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 14147 | struct gdbarch *gdbarch = objfile->arch (); |
801e3a5b | 14148 | struct attribute *attr; |
91da1414 | 14149 | struct attribute *attr_high; |
801e3a5b | 14150 | |
91da1414 MW |
14151 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14152 | if (attr_high) | |
801e3a5b | 14153 | { |
801e3a5b | 14154 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14155 | if (attr != nullptr) |
dda83cd7 | 14156 | { |
95f982e5 TT |
14157 | CORE_ADDR low = attr->as_address (); |
14158 | CORE_ADDR high = attr_high->as_address (); | |
31aa7e4e | 14159 | |
cd6c91b4 | 14160 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14161 | high += low; |
9a619af0 | 14162 | |
3e29f34a MR |
14163 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14164 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14165 | cu->get_builder ()->record_block_range (block, low, high - 1); |
dda83cd7 | 14166 | } |
801e3a5b JB |
14167 | } |
14168 | ||
14169 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
529908cb | 14170 | if (attr != nullptr && attr->form_is_unsigned ()) |
801e3a5b | 14171 | { |
2b0c7f41 SM |
14172 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
14173 | on DWARF version). */ | |
14174 | ULONGEST ranges_offset = attr->as_unsigned (); | |
801e3a5b | 14175 | |
2b0c7f41 SM |
14176 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add |
14177 | this value. */ | |
14178 | if (die->tag != DW_TAG_compile_unit) | |
14179 | ranges_offset += cu->gnu_ranges_base; | |
801e3a5b | 14180 | |
2d5f09ec | 14181 | std::vector<blockrange> blockvec; |
2b0c7f41 | 14182 | dwarf2_ranges_process (ranges_offset, cu, die->tag, |
5f46c5a5 JK |
14183 | [&] (CORE_ADDR start, CORE_ADDR end) |
14184 | { | |
58fdfd2c JK |
14185 | start += baseaddr; |
14186 | end += baseaddr; | |
5f46c5a5 JK |
14187 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14188 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14189 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14190 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14191 | }); |
2d5f09ec KB |
14192 | |
14193 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14194 | } |
14195 | } | |
14196 | ||
685b1105 JK |
14197 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14198 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14199 | |
685b1105 JK |
14200 | static void |
14201 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14202 | { |
38360086 | 14203 | int major, minor; |
60d5a603 JK |
14204 | |
14205 | if (cu->producer == NULL) | |
14206 | { | |
14207 | /* For unknown compilers expect their behavior is DWARF version | |
14208 | compliant. | |
14209 | ||
14210 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14211 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14212 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14213 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14214 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14215 | } |
b1ffba5a | 14216 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14217 | { |
38360086 MW |
14218 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14219 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14220 | } |
5230b05a | 14221 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14222 | { |
14223 | cu->producer_is_icc = true; | |
14224 | cu->producer_is_icc_lt_14 = major < 14; | |
14225 | } | |
c258c396 JD |
14226 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14227 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14228 | else |
14229 | { | |
14230 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14231 | compliant. */ | |
60d5a603 JK |
14232 | } |
14233 | ||
9068261f | 14234 | cu->checked_producer = true; |
685b1105 | 14235 | } |
ba919b58 | 14236 | |
685b1105 JK |
14237 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14238 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14239 | during 4.6.0 experimental. */ | |
14240 | ||
9068261f | 14241 | static bool |
685b1105 JK |
14242 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14243 | { | |
14244 | if (!cu->checked_producer) | |
14245 | check_producer (cu); | |
14246 | ||
14247 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14248 | } |
14249 | ||
c258c396 JD |
14250 | |
14251 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14252 | with incorrect is_stmt attributes. */ | |
14253 | ||
14254 | static bool | |
14255 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14256 | { | |
14257 | if (!cu->checked_producer) | |
14258 | check_producer (cu); | |
14259 | ||
14260 | return cu->producer_is_codewarrior; | |
14261 | } | |
14262 | ||
bf23a268 TT |
14263 | /* Return the accessibility of DIE, as given by DW_AT_accessibility. |
14264 | If that attribute is not available, return the appropriate | |
14265 | default. */ | |
60d5a603 JK |
14266 | |
14267 | static enum dwarf_access_attribute | |
bf23a268 | 14268 | dwarf2_access_attribute (struct die_info *die, struct dwarf2_cu *cu) |
60d5a603 | 14269 | { |
bf23a268 TT |
14270 | attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
14271 | if (attr != nullptr) | |
14272 | { | |
14273 | LONGEST value = attr->constant_value (-1); | |
14274 | if (value == DW_ACCESS_public | |
14275 | || value == DW_ACCESS_protected | |
14276 | || value == DW_ACCESS_private) | |
14277 | return (dwarf_access_attribute) value; | |
14278 | complaint (_("Unhandled DW_AT_accessibility value (%s)"), | |
14279 | plongest (value)); | |
14280 | } | |
14281 | ||
60d5a603 JK |
14282 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) |
14283 | { | |
14284 | /* The default DWARF 2 accessibility for members is public, the default | |
14285 | accessibility for inheritance is private. */ | |
14286 | ||
14287 | if (die->tag != DW_TAG_inheritance) | |
14288 | return DW_ACCESS_public; | |
14289 | else | |
14290 | return DW_ACCESS_private; | |
14291 | } | |
14292 | else | |
14293 | { | |
14294 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14295 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14296 | depends on the container kind. */ | |
14297 | ||
14298 | if (die->parent->tag == DW_TAG_class_type) | |
14299 | return DW_ACCESS_private; | |
14300 | else | |
14301 | return DW_ACCESS_public; | |
14302 | } | |
14303 | } | |
14304 | ||
74ac6d43 TT |
14305 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14306 | offset. If the attribute was not found return 0, otherwise return | |
14307 | 1. If it was found but could not properly be handled, set *OFFSET | |
14308 | to 0. */ | |
14309 | ||
14310 | static int | |
14311 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14312 | LONGEST *offset) | |
14313 | { | |
14314 | struct attribute *attr; | |
14315 | ||
14316 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14317 | if (attr != NULL) | |
14318 | { | |
14319 | *offset = 0; | |
14320 | ||
14321 | /* Note that we do not check for a section offset first here. | |
14322 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14323 | so if we see it, we can assume that a constant form is really | |
14324 | a constant and not a section offset. */ | |
cd6c91b4 | 14325 | if (attr->form_is_constant ()) |
0826b30a | 14326 | *offset = attr->constant_value (0); |
cd6c91b4 | 14327 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14328 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14329 | else if (attr->form_is_block ()) |
9d2246fc | 14330 | *offset = decode_locdesc (attr->as_block (), cu); |
74ac6d43 TT |
14331 | else |
14332 | dwarf2_complex_location_expr_complaint (); | |
14333 | ||
14334 | return 1; | |
14335 | } | |
14336 | ||
14337 | return 0; | |
14338 | } | |
14339 | ||
7d79de9a TT |
14340 | /* Look for DW_AT_data_member_location and store the results in FIELD. */ |
14341 | ||
14342 | static void | |
14343 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14344 | struct field *field) | |
14345 | { | |
14346 | struct attribute *attr; | |
14347 | ||
14348 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14349 | if (attr != NULL) | |
14350 | { | |
14351 | if (attr->form_is_constant ()) | |
14352 | { | |
14353 | LONGEST offset = attr->constant_value (0); | |
14354 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14355 | } | |
14356 | else if (attr->form_is_section_offset ()) | |
14357 | dwarf2_complex_location_expr_complaint (); | |
14358 | else if (attr->form_is_block ()) | |
14359 | { | |
14360 | bool handled; | |
9d2246fc | 14361 | CORE_ADDR offset = decode_locdesc (attr->as_block (), cu, &handled); |
7d79de9a TT |
14362 | if (handled) |
14363 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14364 | else | |
14365 | { | |
5e22e966 SM |
14366 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
14367 | struct objfile *objfile = per_objfile->objfile; | |
7d79de9a TT |
14368 | struct dwarf2_locexpr_baton *dlbaton |
14369 | = XOBNEW (&objfile->objfile_obstack, | |
14370 | struct dwarf2_locexpr_baton); | |
9d2246fc TT |
14371 | dlbaton->data = attr->as_block ()->data; |
14372 | dlbaton->size = attr->as_block ()->size; | |
7d79de9a TT |
14373 | /* When using this baton, we want to compute the address |
14374 | of the field, not the value. This is why | |
14375 | is_reference is set to false here. */ | |
14376 | dlbaton->is_reference = false; | |
5e22e966 | 14377 | dlbaton->per_objfile = per_objfile; |
7d79de9a TT |
14378 | dlbaton->per_cu = cu->per_cu; |
14379 | ||
14380 | SET_FIELD_DWARF_BLOCK (*field, dlbaton); | |
14381 | } | |
14382 | } | |
14383 | else | |
14384 | dwarf2_complex_location_expr_complaint (); | |
14385 | } | |
14386 | } | |
14387 | ||
c906108c SS |
14388 | /* Add an aggregate field to the field list. */ |
14389 | ||
14390 | static void | |
107d2387 | 14391 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14392 | struct dwarf2_cu *cu) |
6e70227d | 14393 | { |
5e22e966 | 14394 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 14395 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
14396 | struct nextfield *new_field; |
14397 | struct attribute *attr; | |
14398 | struct field *fp; | |
15d034d0 | 14399 | const char *fieldname = ""; |
c906108c | 14400 | |
7d0ccb61 DJ |
14401 | if (die->tag == DW_TAG_inheritance) |
14402 | { | |
be2daae6 TT |
14403 | fip->baseclasses.emplace_back (); |
14404 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14405 | } |
14406 | else | |
14407 | { | |
be2daae6 TT |
14408 | fip->fields.emplace_back (); |
14409 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14410 | } |
be2daae6 | 14411 | |
9c6a1327 TT |
14412 | new_field->offset = die->sect_off; |
14413 | ||
bf23a268 | 14414 | new_field->accessibility = dwarf2_access_attribute (die, cu); |
c906108c | 14415 | if (new_field->accessibility != DW_ACCESS_public) |
264fc0e2 | 14416 | fip->non_public_fields = true; |
60d5a603 | 14417 | |
e142c38c | 14418 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14419 | if (attr != nullptr) |
23dca5c3 | 14420 | new_field->virtuality = attr->as_virtuality (); |
60d5a603 JK |
14421 | else |
14422 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14423 | |
14424 | fp = &new_field->field; | |
a9a9bd0f | 14425 | |
e142c38c | 14426 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14427 | { |
a9a9bd0f | 14428 | /* Data member other than a C++ static data member. */ |
6e70227d | 14429 | |
c906108c | 14430 | /* Get type of field. */ |
5d14b6e5 | 14431 | fp->set_type (die_type (die, cu)); |
c906108c | 14432 | |
d6a843b5 | 14433 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14434 | |
c906108c | 14435 | /* Get bit size of field (zero if none). */ |
e142c38c | 14436 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14437 | if (attr != nullptr) |
c906108c | 14438 | { |
529908cb | 14439 | FIELD_BITSIZE (*fp) = attr->constant_value (0); |
c906108c SS |
14440 | } |
14441 | else | |
14442 | { | |
14443 | FIELD_BITSIZE (*fp) = 0; | |
14444 | } | |
14445 | ||
14446 | /* Get bit offset of field. */ | |
7d79de9a | 14447 | handle_data_member_location (die, cu, fp); |
e142c38c | 14448 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
7c184d33 | 14449 | if (attr != nullptr && attr->form_is_constant ()) |
c906108c | 14450 | { |
d5a22e77 | 14451 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14452 | { |
14453 | /* For big endian bits, the DW_AT_bit_offset gives the | |
dda83cd7 SM |
14454 | additional bit offset from the MSB of the containing |
14455 | anonymous object to the MSB of the field. We don't | |
14456 | have to do anything special since we don't need to | |
14457 | know the size of the anonymous object. */ | |
529908cb | 14458 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) |
7c184d33 | 14459 | + attr->constant_value (0))); |
c906108c SS |
14460 | } |
14461 | else | |
14462 | { | |
14463 | /* For little endian bits, compute the bit offset to the | |
dda83cd7 SM |
14464 | MSB of the anonymous object, subtract off the number of |
14465 | bits from the MSB of the field to the MSB of the | |
14466 | object, and then subtract off the number of bits of | |
14467 | the field itself. The result is the bit offset of | |
14468 | the LSB of the field. */ | |
c906108c | 14469 | int anonymous_size; |
7c184d33 | 14470 | int bit_offset = attr->constant_value (0); |
c906108c | 14471 | |
e142c38c | 14472 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
7c184d33 | 14473 | if (attr != nullptr && attr->form_is_constant ()) |
c906108c SS |
14474 | { |
14475 | /* The size of the anonymous object containing | |
14476 | the bit field is explicit, so use the | |
14477 | indicated size (in bytes). */ | |
7c184d33 | 14478 | anonymous_size = attr->constant_value (0); |
c906108c SS |
14479 | } |
14480 | else | |
14481 | { | |
14482 | /* The size of the anonymous object containing | |
14483 | the bit field must be inferred from the type | |
14484 | attribute of the data member containing the | |
14485 | bit field. */ | |
5d14b6e5 | 14486 | anonymous_size = TYPE_LENGTH (fp->type ()); |
c906108c | 14487 | } |
f41f5e61 PA |
14488 | SET_FIELD_BITPOS (*fp, |
14489 | (FIELD_BITPOS (*fp) | |
14490 | + anonymous_size * bits_per_byte | |
14491 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14492 | } |
14493 | } | |
da5b30da AA |
14494 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14495 | if (attr != NULL) | |
14496 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
0826b30a | 14497 | + attr->constant_value (0))); |
c906108c SS |
14498 | |
14499 | /* Get name of field. */ | |
39cbfefa DJ |
14500 | fieldname = dwarf2_name (die, cu); |
14501 | if (fieldname == NULL) | |
14502 | fieldname = ""; | |
d8151005 DJ |
14503 | |
14504 | /* The name is already allocated along with this objfile, so we don't | |
14505 | need to duplicate it for the type. */ | |
14506 | fp->name = fieldname; | |
c906108c SS |
14507 | |
14508 | /* Change accessibility for artificial fields (e.g. virtual table | |
dda83cd7 | 14509 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14510 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14511 | { |
d48cc9dd | 14512 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c | 14513 | new_field->accessibility = DW_ACCESS_private; |
264fc0e2 | 14514 | fip->non_public_fields = true; |
c906108c SS |
14515 | } |
14516 | } | |
a9a9bd0f | 14517 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14518 | { |
a9a9bd0f DC |
14519 | /* C++ static member. */ |
14520 | ||
14521 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14522 | is a declaration, but all versions of G++ as of this writing | |
14523 | (so through at least 3.2.1) incorrectly generate | |
14524 | DW_TAG_variable tags. */ | |
6e70227d | 14525 | |
ff355380 | 14526 | const char *physname; |
c906108c | 14527 | |
a9a9bd0f | 14528 | /* Get name of field. */ |
39cbfefa DJ |
14529 | fieldname = dwarf2_name (die, cu); |
14530 | if (fieldname == NULL) | |
c906108c SS |
14531 | return; |
14532 | ||
254e6b9e | 14533 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14534 | if (attr |
14535 | /* Only create a symbol if this is an external value. | |
14536 | new_symbol checks this and puts the value in the global symbol | |
14537 | table, which we want. If it is not external, new_symbol | |
14538 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14539 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14540 | { |
14541 | /* A static const member, not much different than an enum as far as | |
14542 | we're concerned, except that we can support more types. */ | |
14543 | new_symbol (die, NULL, cu); | |
14544 | } | |
14545 | ||
2df3850c | 14546 | /* Get physical name. */ |
ff355380 | 14547 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14548 | |
d8151005 DJ |
14549 | /* The name is already allocated along with this objfile, so we don't |
14550 | need to duplicate it for the type. */ | |
14551 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
5d14b6e5 | 14552 | fp->set_type (die_type (die, cu)); |
d8151005 | 14553 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14554 | } |
14555 | else if (die->tag == DW_TAG_inheritance) | |
14556 | { | |
74ac6d43 | 14557 | /* C++ base class field. */ |
7d79de9a | 14558 | handle_data_member_location (die, cu, fp); |
c906108c | 14559 | FIELD_BITSIZE (*fp) = 0; |
5d14b6e5 SM |
14560 | fp->set_type (die_type (die, cu)); |
14561 | FIELD_NAME (*fp) = fp->type ()->name (); | |
c906108c | 14562 | } |
2ddeaf8a TT |
14563 | else |
14564 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14565 | } |
14566 | ||
883fd55a KS |
14567 | /* Can the type given by DIE define another type? */ |
14568 | ||
14569 | static bool | |
14570 | type_can_define_types (const struct die_info *die) | |
14571 | { | |
14572 | switch (die->tag) | |
14573 | { | |
14574 | case DW_TAG_typedef: | |
14575 | case DW_TAG_class_type: | |
14576 | case DW_TAG_structure_type: | |
14577 | case DW_TAG_union_type: | |
14578 | case DW_TAG_enumeration_type: | |
14579 | return true; | |
14580 | ||
14581 | default: | |
14582 | return false; | |
14583 | } | |
14584 | } | |
14585 | ||
14586 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14587 | |
14588 | static void | |
883fd55a KS |
14589 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14590 | struct dwarf2_cu *cu) | |
6e70227d | 14591 | { |
be2daae6 TT |
14592 | struct decl_field fp; |
14593 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14594 | |
883fd55a | 14595 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14596 | |
883fd55a | 14597 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14598 | fp.name = dwarf2_name (die, cu); |
14599 | fp.type = read_type_die (die, cu); | |
98751a41 | 14600 | |
c191a687 | 14601 | /* Save accessibility. */ |
bf23a268 | 14602 | dwarf_access_attribute accessibility = dwarf2_access_attribute (die, cu); |
c191a687 KS |
14603 | switch (accessibility) |
14604 | { | |
14605 | case DW_ACCESS_public: | |
14606 | /* The assumed value if neither private nor protected. */ | |
14607 | break; | |
14608 | case DW_ACCESS_private: | |
be2daae6 | 14609 | fp.is_private = 1; |
c191a687 KS |
14610 | break; |
14611 | case DW_ACCESS_protected: | |
be2daae6 | 14612 | fp.is_protected = 1; |
c191a687 | 14613 | break; |
c191a687 KS |
14614 | } |
14615 | ||
883fd55a | 14616 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14617 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14618 | else |
be2daae6 | 14619 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14620 | } |
14621 | ||
9c6a1327 TT |
14622 | /* A convenience typedef that's used when finding the discriminant |
14623 | field for a variant part. */ | |
1b95cdb7 SM |
14624 | typedef std::unordered_map<sect_offset, int, gdb::hash_enum<sect_offset>> |
14625 | offset_map_type; | |
9c6a1327 TT |
14626 | |
14627 | /* Compute the discriminant range for a given variant. OBSTACK is | |
14628 | where the results will be stored. VARIANT is the variant to | |
14629 | process. IS_UNSIGNED indicates whether the discriminant is signed | |
14630 | or unsigned. */ | |
14631 | ||
14632 | static const gdb::array_view<discriminant_range> | |
14633 | convert_variant_range (struct obstack *obstack, const variant_field &variant, | |
14634 | bool is_unsigned) | |
14635 | { | |
14636 | std::vector<discriminant_range> ranges; | |
14637 | ||
14638 | if (variant.default_branch) | |
14639 | return {}; | |
14640 | ||
14641 | if (variant.discr_list_data == nullptr) | |
14642 | { | |
14643 | discriminant_range r | |
14644 | = {variant.discriminant_value, variant.discriminant_value}; | |
14645 | ranges.push_back (r); | |
14646 | } | |
14647 | else | |
14648 | { | |
14649 | gdb::array_view<const gdb_byte> data (variant.discr_list_data->data, | |
14650 | variant.discr_list_data->size); | |
14651 | while (!data.empty ()) | |
14652 | { | |
14653 | if (data[0] != DW_DSC_range && data[0] != DW_DSC_label) | |
14654 | { | |
14655 | complaint (_("invalid discriminant marker: %d"), data[0]); | |
14656 | break; | |
14657 | } | |
14658 | bool is_range = data[0] == DW_DSC_range; | |
14659 | data = data.slice (1); | |
14660 | ||
14661 | ULONGEST low, high; | |
14662 | unsigned int bytes_read; | |
14663 | ||
14664 | if (data.empty ()) | |
14665 | { | |
14666 | complaint (_("DW_AT_discr_list missing low value")); | |
14667 | break; | |
14668 | } | |
14669 | if (is_unsigned) | |
14670 | low = read_unsigned_leb128 (nullptr, data.data (), &bytes_read); | |
14671 | else | |
14672 | low = (ULONGEST) read_signed_leb128 (nullptr, data.data (), | |
14673 | &bytes_read); | |
14674 | data = data.slice (bytes_read); | |
14675 | ||
14676 | if (is_range) | |
14677 | { | |
14678 | if (data.empty ()) | |
14679 | { | |
14680 | complaint (_("DW_AT_discr_list missing high value")); | |
14681 | break; | |
14682 | } | |
14683 | if (is_unsigned) | |
14684 | high = read_unsigned_leb128 (nullptr, data.data (), | |
14685 | &bytes_read); | |
14686 | else | |
14687 | high = (LONGEST) read_signed_leb128 (nullptr, data.data (), | |
14688 | &bytes_read); | |
14689 | data = data.slice (bytes_read); | |
14690 | } | |
14691 | else | |
14692 | high = low; | |
14693 | ||
14694 | ranges.push_back ({ low, high }); | |
14695 | } | |
14696 | } | |
14697 | ||
14698 | discriminant_range *result = XOBNEWVEC (obstack, discriminant_range, | |
14699 | ranges.size ()); | |
14700 | std::copy (ranges.begin (), ranges.end (), result); | |
14701 | return gdb::array_view<discriminant_range> (result, ranges.size ()); | |
14702 | } | |
14703 | ||
14704 | static const gdb::array_view<variant_part> create_variant_parts | |
14705 | (struct obstack *obstack, | |
14706 | const offset_map_type &offset_map, | |
14707 | struct field_info *fi, | |
14708 | const std::vector<variant_part_builder> &variant_parts); | |
14709 | ||
14710 | /* Fill in a "struct variant" for a given variant field. RESULT is | |
14711 | the variant to fill in. OBSTACK is where any needed allocations | |
14712 | will be done. OFFSET_MAP holds the mapping from section offsets to | |
14713 | fields for the type. FI describes the fields of the type we're | |
14714 | processing. FIELD is the variant field we're converting. */ | |
14715 | ||
14716 | static void | |
14717 | create_one_variant (variant &result, struct obstack *obstack, | |
14718 | const offset_map_type &offset_map, | |
14719 | struct field_info *fi, const variant_field &field) | |
14720 | { | |
14721 | result.discriminants = convert_variant_range (obstack, field, false); | |
14722 | result.first_field = field.first_field + fi->baseclasses.size (); | |
14723 | result.last_field = field.last_field + fi->baseclasses.size (); | |
14724 | result.parts = create_variant_parts (obstack, offset_map, fi, | |
14725 | field.variant_parts); | |
14726 | } | |
14727 | ||
14728 | /* Fill in a "struct variant_part" for a given variant part. RESULT | |
14729 | is the variant part to fill in. OBSTACK is where any needed | |
14730 | allocations will be done. OFFSET_MAP holds the mapping from | |
14731 | section offsets to fields for the type. FI describes the fields of | |
14732 | the type we're processing. BUILDER is the variant part to be | |
14733 | converted. */ | |
14734 | ||
14735 | static void | |
14736 | create_one_variant_part (variant_part &result, | |
14737 | struct obstack *obstack, | |
14738 | const offset_map_type &offset_map, | |
14739 | struct field_info *fi, | |
14740 | const variant_part_builder &builder) | |
14741 | { | |
14742 | auto iter = offset_map.find (builder.discriminant_offset); | |
14743 | if (iter == offset_map.end ()) | |
14744 | { | |
14745 | result.discriminant_index = -1; | |
14746 | /* Doesn't matter. */ | |
14747 | result.is_unsigned = false; | |
14748 | } | |
14749 | else | |
14750 | { | |
14751 | result.discriminant_index = iter->second; | |
14752 | result.is_unsigned | |
c6d940a9 | 14753 | = fi->fields[result.discriminant_index].field.type ()->is_unsigned (); |
9c6a1327 TT |
14754 | } |
14755 | ||
14756 | size_t n = builder.variants.size (); | |
14757 | variant *output = new (obstack) variant[n]; | |
14758 | for (size_t i = 0; i < n; ++i) | |
14759 | create_one_variant (output[i], obstack, offset_map, fi, | |
14760 | builder.variants[i]); | |
14761 | ||
14762 | result.variants = gdb::array_view<variant> (output, n); | |
14763 | } | |
14764 | ||
14765 | /* Create a vector of variant parts that can be attached to a type. | |
14766 | OBSTACK is where any needed allocations will be done. OFFSET_MAP | |
14767 | holds the mapping from section offsets to fields for the type. FI | |
14768 | describes the fields of the type we're processing. VARIANT_PARTS | |
14769 | is the vector to convert. */ | |
14770 | ||
14771 | static const gdb::array_view<variant_part> | |
14772 | create_variant_parts (struct obstack *obstack, | |
14773 | const offset_map_type &offset_map, | |
14774 | struct field_info *fi, | |
14775 | const std::vector<variant_part_builder> &variant_parts) | |
14776 | { | |
14777 | if (variant_parts.empty ()) | |
14778 | return {}; | |
14779 | ||
14780 | size_t n = variant_parts.size (); | |
14781 | variant_part *result = new (obstack) variant_part[n]; | |
14782 | for (size_t i = 0; i < n; ++i) | |
14783 | create_one_variant_part (result[i], obstack, offset_map, fi, | |
14784 | variant_parts[i]); | |
14785 | ||
14786 | return gdb::array_view<variant_part> (result, n); | |
14787 | } | |
14788 | ||
14789 | /* Compute the variant part vector for FIP, attaching it to TYPE when | |
14790 | done. */ | |
14791 | ||
14792 | static void | |
14793 | add_variant_property (struct field_info *fip, struct type *type, | |
14794 | struct dwarf2_cu *cu) | |
14795 | { | |
14796 | /* Map section offsets of fields to their field index. Note the | |
14797 | field index here does not take the number of baseclasses into | |
14798 | account. */ | |
14799 | offset_map_type offset_map; | |
14800 | for (int i = 0; i < fip->fields.size (); ++i) | |
14801 | offset_map[fip->fields[i].offset] = i; | |
14802 | ||
5e22e966 | 14803 | struct objfile *objfile = cu->per_objfile->objfile; |
9c6a1327 TT |
14804 | gdb::array_view<variant_part> parts |
14805 | = create_variant_parts (&objfile->objfile_obstack, offset_map, fip, | |
14806 | fip->variant_parts); | |
14807 | ||
14808 | struct dynamic_prop prop; | |
8c2e4e06 SM |
14809 | prop.set_variant_parts ((gdb::array_view<variant_part> *) |
14810 | obstack_copy (&objfile->objfile_obstack, &parts, | |
14811 | sizeof (parts))); | |
9c6a1327 | 14812 | |
5c54719c | 14813 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
9c6a1327 TT |
14814 | } |
14815 | ||
c906108c SS |
14816 | /* Create the vector of fields, and attach it to the type. */ |
14817 | ||
14818 | static void | |
fba45db2 | 14819 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14820 | struct dwarf2_cu *cu) |
c906108c | 14821 | { |
317f7127 | 14822 | int nfields = fip->nfields (); |
c906108c SS |
14823 | |
14824 | /* Record the field count, allocate space for the array of fields, | |
14825 | and create blank accessibility bitfields if necessary. */ | |
5e33d5f4 | 14826 | type->set_num_fields (nfields); |
3cabb6b0 SM |
14827 | type->set_fields |
14828 | ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * nfields)); | |
c906108c | 14829 | |
b4ba55a1 | 14830 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14831 | { |
14832 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14833 | ||
14834 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14835 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14836 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14837 | ||
14838 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14839 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14840 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14841 | ||
774b6a14 TT |
14842 | TYPE_FIELD_IGNORE_BITS (type) = |
14843 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14844 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14845 | } |
14846 | ||
14847 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14848 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14849 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14850 | { |
be2daae6 | 14851 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14852 | unsigned char *pointer; |
c906108c SS |
14853 | |
14854 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14855 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14856 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14857 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14858 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14859 | } |
14860 | ||
9c6a1327 TT |
14861 | if (!fip->variant_parts.empty ()) |
14862 | add_variant_property (fip, type, cu); | |
2ddeaf8a | 14863 | |
be2daae6 TT |
14864 | /* Copy the saved-up fields into the field vector. */ |
14865 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14866 | { |
be2daae6 TT |
14867 | struct nextfield &field |
14868 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14869 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14870 | |
ceacbf6e | 14871 | type->field (i) = field.field; |
be2daae6 | 14872 | switch (field.accessibility) |
c906108c | 14873 | { |
c5aa993b | 14874 | case DW_ACCESS_private: |
b4ba55a1 | 14875 | if (cu->language != language_ada) |
be2daae6 | 14876 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14877 | break; |
c906108c | 14878 | |
c5aa993b | 14879 | case DW_ACCESS_protected: |
b4ba55a1 | 14880 | if (cu->language != language_ada) |
be2daae6 | 14881 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14882 | break; |
c906108c | 14883 | |
c5aa993b JM |
14884 | case DW_ACCESS_public: |
14885 | break; | |
c906108c | 14886 | |
c5aa993b JM |
14887 | default: |
14888 | /* Unknown accessibility. Complain and treat it as public. */ | |
14889 | { | |
b98664d3 | 14890 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14891 | field.accessibility); |
c5aa993b JM |
14892 | } |
14893 | break; | |
c906108c | 14894 | } |
be2daae6 | 14895 | if (i < fip->baseclasses.size ()) |
c906108c | 14896 | { |
be2daae6 | 14897 | switch (field.virtuality) |
c906108c | 14898 | { |
c5aa993b JM |
14899 | case DW_VIRTUALITY_virtual: |
14900 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14901 | if (cu->language == language_ada) |
a73c6dcd | 14902 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14903 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14904 | break; |
c906108c SS |
14905 | } |
14906 | } | |
c906108c SS |
14907 | } |
14908 | } | |
14909 | ||
7d27a96d TT |
14910 | /* Return true if this member function is a constructor, false |
14911 | otherwise. */ | |
14912 | ||
14913 | static int | |
14914 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14915 | { | |
14916 | const char *fieldname; | |
fe978cb0 | 14917 | const char *type_name; |
7d27a96d TT |
14918 | int len; |
14919 | ||
14920 | if (die->parent == NULL) | |
14921 | return 0; | |
14922 | ||
14923 | if (die->parent->tag != DW_TAG_structure_type | |
14924 | && die->parent->tag != DW_TAG_union_type | |
14925 | && die->parent->tag != DW_TAG_class_type) | |
14926 | return 0; | |
14927 | ||
14928 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14929 | type_name = dwarf2_name (die->parent, cu); |
14930 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14931 | return 0; |
14932 | ||
14933 | len = strlen (fieldname); | |
fe978cb0 PA |
14934 | return (strncmp (fieldname, type_name, len) == 0 |
14935 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14936 | } |
14937 | ||
c906108c SS |
14938 | /* Add a member function to the proper fieldlist. */ |
14939 | ||
14940 | static void | |
107d2387 | 14941 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14942 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14943 | { |
5e22e966 | 14944 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 14945 | struct attribute *attr; |
c906108c | 14946 | int i; |
be2daae6 | 14947 | struct fnfieldlist *flp = nullptr; |
c906108c | 14948 | struct fn_field *fnp; |
15d034d0 | 14949 | const char *fieldname; |
f792889a | 14950 | struct type *this_type; |
c906108c | 14951 | |
b4ba55a1 | 14952 | if (cu->language == language_ada) |
a73c6dcd | 14953 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14954 | |
2df3850c | 14955 | /* Get name of member function. */ |
39cbfefa DJ |
14956 | fieldname = dwarf2_name (die, cu); |
14957 | if (fieldname == NULL) | |
2df3850c | 14958 | return; |
c906108c | 14959 | |
c906108c | 14960 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14961 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14962 | { |
27bfe10e | 14963 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14964 | { |
14965 | flp = &fip->fnfieldlists[i]; | |
14966 | break; | |
14967 | } | |
c906108c SS |
14968 | } |
14969 | ||
be2daae6 TT |
14970 | /* Create a new fnfieldlist if necessary. */ |
14971 | if (flp == nullptr) | |
c906108c | 14972 | { |
be2daae6 TT |
14973 | fip->fnfieldlists.emplace_back (); |
14974 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14975 | flp->name = fieldname; |
be2daae6 | 14976 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14977 | } |
14978 | ||
be2daae6 TT |
14979 | /* Create a new member function field and add it to the vector of |
14980 | fnfieldlists. */ | |
14981 | flp->fnfields.emplace_back (); | |
14982 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14983 | |
14984 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14985 | if (cu->language == language_cplus) |
be2daae6 TT |
14986 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
14987 | die, cu); | |
3da10d80 KS |
14988 | else |
14989 | { | |
1d06ead6 | 14990 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14991 | fnp->physname = physname ? physname : ""; |
14992 | } | |
14993 | ||
c906108c | 14994 | fnp->type = alloc_type (objfile); |
f792889a | 14995 | this_type = read_type_die (die, cu); |
78134374 | 14996 | if (this_type && this_type->code () == TYPE_CODE_FUNC) |
c906108c | 14997 | { |
1f704f76 | 14998 | int nparams = this_type->num_fields (); |
c906108c | 14999 | |
f792889a | 15000 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15001 | of the method itself (TYPE_CODE_METHOD). */ |
15002 | smash_to_method_type (fnp->type, type, | |
f792889a | 15003 | TYPE_TARGET_TYPE (this_type), |
80fc5e77 | 15004 | this_type->fields (), |
1f704f76 | 15005 | this_type->num_fields (), |
a409645d | 15006 | this_type->has_varargs ()); |
c906108c SS |
15007 | |
15008 | /* Handle static member functions. | |
dda83cd7 SM |
15009 | Dwarf2 has no clean way to discern C++ static and non-static |
15010 | member functions. G++ helps GDB by marking the first | |
15011 | parameter for non-static member functions (which is the this | |
15012 | pointer) as artificial. We obtain this information from | |
15013 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15014 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15015 | fnp->voffset = VOFFSET_STATIC; |
15016 | } | |
15017 | else | |
b98664d3 | 15018 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15019 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15020 | |
15021 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15022 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15023 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15024 | |
3e43a32a MS |
15025 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15026 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15027 | |
15028 | /* Get accessibility. */ | |
bf23a268 | 15029 | dwarf_access_attribute accessibility = dwarf2_access_attribute (die, cu); |
60d5a603 | 15030 | switch (accessibility) |
c906108c | 15031 | { |
60d5a603 JK |
15032 | case DW_ACCESS_private: |
15033 | fnp->is_private = 1; | |
15034 | break; | |
15035 | case DW_ACCESS_protected: | |
15036 | fnp->is_protected = 1; | |
15037 | break; | |
c906108c SS |
15038 | } |
15039 | ||
b02dede2 | 15040 | /* Check for artificial methods. */ |
e142c38c | 15041 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
c45bc3f8 | 15042 | if (attr && attr->as_boolean ()) |
b02dede2 DJ |
15043 | fnp->is_artificial = 1; |
15044 | ||
e35000a7 TBA |
15045 | /* Check for defaulted methods. */ |
15046 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
e8e5c158 TT |
15047 | if (attr != nullptr) |
15048 | fnp->defaulted = attr->defaulted (); | |
e35000a7 TBA |
15049 | |
15050 | /* Check for deleted methods. */ | |
15051 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
c45bc3f8 | 15052 | if (attr != nullptr && attr->as_boolean ()) |
e35000a7 TBA |
15053 | fnp->is_deleted = 1; |
15054 | ||
7d27a96d TT |
15055 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15056 | ||
0d564a31 | 15057 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15058 | function. For older versions of GCC, this is an offset in the |
15059 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15060 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15061 | to the object address. */ |
15062 | ||
e142c38c | 15063 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 15064 | if (attr != nullptr) |
8e19ed76 | 15065 | { |
9d2246fc | 15066 | if (attr->form_is_block () && attr->as_block ()->size > 0) |
dda83cd7 | 15067 | { |
9d2246fc TT |
15068 | struct dwarf_block *block = attr->as_block (); |
15069 | ||
15070 | if (block->data[0] == DW_OP_constu) | |
aec5aa8b TT |
15071 | { |
15072 | /* Old-style GCC. */ | |
9d2246fc | 15073 | fnp->voffset = decode_locdesc (block, cu) + 2; |
aec5aa8b | 15074 | } |
9d2246fc TT |
15075 | else if (block->data[0] == DW_OP_deref |
15076 | || (block->size > 1 | |
15077 | && block->data[0] == DW_OP_deref_size | |
15078 | && block->data[1] == cu->header.addr_size)) | |
aec5aa8b | 15079 | { |
9d2246fc | 15080 | fnp->voffset = decode_locdesc (block, cu); |
aec5aa8b TT |
15081 | if ((fnp->voffset % cu->header.addr_size) != 0) |
15082 | dwarf2_complex_location_expr_complaint (); | |
15083 | else | |
15084 | fnp->voffset /= cu->header.addr_size; | |
15085 | fnp->voffset += 2; | |
15086 | } | |
15087 | else | |
15088 | dwarf2_complex_location_expr_complaint (); | |
15089 | ||
15090 | if (!fnp->fcontext) | |
7e993ebf KS |
15091 | { |
15092 | /* If there is no `this' field and no DW_AT_containing_type, | |
15093 | we cannot actually find a base class context for the | |
15094 | vtable! */ | |
1f704f76 | 15095 | if (this_type->num_fields () == 0 |
7e993ebf KS |
15096 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) |
15097 | { | |
b98664d3 | 15098 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15099 | "function \"%s\" (offset %s)"), |
15100 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15101 | } |
15102 | else | |
15103 | { | |
15104 | fnp->fcontext | |
940da03e | 15105 | = TYPE_TARGET_TYPE (this_type->field (0).type ()); |
7e993ebf KS |
15106 | } |
15107 | } | |
aec5aa8b | 15108 | } |
cd6c91b4 | 15109 | else if (attr->form_is_section_offset ()) |
dda83cd7 | 15110 | { |
4d3c2250 | 15111 | dwarf2_complex_location_expr_complaint (); |
dda83cd7 | 15112 | } |
8e19ed76 | 15113 | else |
dda83cd7 | 15114 | { |
4d3c2250 KB |
15115 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15116 | fieldname); | |
dda83cd7 | 15117 | } |
0d564a31 | 15118 | } |
d48cc9dd DJ |
15119 | else |
15120 | { | |
15121 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
23dca5c3 | 15122 | if (attr != nullptr && attr->as_virtuality () != DW_VIRTUALITY_none) |
d48cc9dd DJ |
15123 | { |
15124 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15125 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15126 | "but the vtable offset is not specified"), |
9d8780f0 | 15127 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15128 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15129 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15130 | } | |
15131 | } | |
c906108c SS |
15132 | } |
15133 | ||
15134 | /* Create the vector of member function fields, and attach it to the type. */ | |
15135 | ||
15136 | static void | |
fba45db2 | 15137 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15138 | struct dwarf2_cu *cu) |
c906108c | 15139 | { |
b4ba55a1 | 15140 | if (cu->language == language_ada) |
a73c6dcd | 15141 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15142 | |
c906108c SS |
15143 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15144 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15145 | TYPE_ALLOC (type, |
15146 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15147 | |
be2daae6 | 15148 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15149 | { |
be2daae6 | 15150 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15151 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15152 | |
be2daae6 TT |
15153 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15154 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15155 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15156 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15157 | ||
15158 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15159 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15160 | } |
15161 | ||
be2daae6 | 15162 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15163 | } |
15164 | ||
1168df01 JB |
15165 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15166 | language, zero otherwise. */ | |
15167 | static int | |
15168 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15169 | { | |
15170 | static const char vptr[] = "_vptr"; | |
15171 | ||
9c37b5ae TT |
15172 | /* Look for the C++ form of the vtable. */ |
15173 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15174 | return 1; |
15175 | ||
15176 | return 0; | |
15177 | } | |
15178 | ||
c0dd20ea | 15179 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15180 | functions, with the ABI-specified layout. If TYPE describes |
15181 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15182 | |
15183 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15184 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15185 | |
0b92b5bb TT |
15186 | static void |
15187 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15188 | { |
09e2d7c7 | 15189 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15190 | |
15191 | /* Check for a structure with no name and two children. */ | |
1f704f76 | 15192 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) |
0b92b5bb | 15193 | return; |
c0dd20ea DJ |
15194 | |
15195 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15196 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15197 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15198 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15199 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15200 | return; | |
c0dd20ea DJ |
15201 | |
15202 | /* Find the type of the method. */ | |
940da03e | 15203 | pfn_type = type->field (0).type (); |
c0dd20ea | 15204 | if (pfn_type == NULL |
78134374 SM |
15205 | || pfn_type->code () != TYPE_CODE_PTR |
15206 | || TYPE_TARGET_TYPE (pfn_type)->code () != TYPE_CODE_FUNC) | |
0b92b5bb | 15207 | return; |
c0dd20ea DJ |
15208 | |
15209 | /* Look for the "this" argument. */ | |
15210 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
1f704f76 | 15211 | if (pfn_type->num_fields () == 0 |
940da03e SM |
15212 | /* || pfn_type->field (0).type () == NULL */ |
15213 | || pfn_type->field (0).type ()->code () != TYPE_CODE_PTR) | |
0b92b5bb | 15214 | return; |
c0dd20ea | 15215 | |
940da03e | 15216 | self_type = TYPE_TARGET_TYPE (pfn_type->field (0).type ()); |
0b92b5bb | 15217 | new_type = alloc_type (objfile); |
09e2d7c7 | 15218 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
80fc5e77 | 15219 | pfn_type->fields (), pfn_type->num_fields (), |
a409645d | 15220 | pfn_type->has_varargs ()); |
0b92b5bb | 15221 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15222 | } |
1168df01 | 15223 | |
e26624c6 TT |
15224 | /* Helper for quirk_ada_thick_pointer. If TYPE is an array type that |
15225 | requires rewriting, then copy it and return the updated copy. | |
15226 | Otherwise return nullptr. */ | |
15227 | ||
15228 | static struct type * | |
15229 | rewrite_array_type (struct type *type) | |
15230 | { | |
15231 | if (type->code () != TYPE_CODE_ARRAY) | |
15232 | return nullptr; | |
15233 | ||
15234 | struct type *index_type = type->index_type (); | |
15235 | range_bounds *current_bounds = index_type->bounds (); | |
15236 | ||
15237 | /* Handle multi-dimensional arrays. */ | |
15238 | struct type *new_target = rewrite_array_type (TYPE_TARGET_TYPE (type)); | |
15239 | if (new_target == nullptr) | |
15240 | { | |
15241 | /* Maybe we don't need to rewrite this array. */ | |
15242 | if (current_bounds->low.kind () == PROP_CONST | |
15243 | && current_bounds->high.kind () == PROP_CONST) | |
15244 | return nullptr; | |
15245 | } | |
15246 | ||
15247 | /* Either the target type was rewritten, or the bounds have to be | |
15248 | updated. Either way we want to copy the type and update | |
15249 | everything. */ | |
15250 | struct type *copy = copy_type (type); | |
15251 | int nfields = copy->num_fields (); | |
15252 | field *new_fields | |
15253 | = ((struct field *) TYPE_ZALLOC (copy, | |
15254 | nfields * sizeof (struct field))); | |
15255 | memcpy (new_fields, copy->fields (), nfields * sizeof (struct field)); | |
15256 | copy->set_fields (new_fields); | |
15257 | if (new_target != nullptr) | |
15258 | TYPE_TARGET_TYPE (copy) = new_target; | |
15259 | ||
15260 | struct type *index_copy = copy_type (index_type); | |
15261 | range_bounds *bounds | |
15262 | = (struct range_bounds *) TYPE_ZALLOC (index_copy, | |
15263 | sizeof (range_bounds)); | |
15264 | *bounds = *current_bounds; | |
15265 | bounds->low.set_const_val (1); | |
15266 | bounds->high.set_const_val (0); | |
15267 | index_copy->set_bounds (bounds); | |
15268 | copy->set_index_type (index_copy); | |
15269 | ||
15270 | return copy; | |
15271 | } | |
15272 | ||
57567375 TT |
15273 | /* While some versions of GCC will generate complicated DWARF for an |
15274 | array (see quirk_ada_thick_pointer), more recent versions were | |
15275 | modified to emit an explicit thick pointer structure. However, in | |
15276 | this case, the array still has DWARF expressions for its ranges, | |
15277 | and these must be ignored. */ | |
15278 | ||
15279 | static void | |
15280 | quirk_ada_thick_pointer_struct (struct die_info *die, struct dwarf2_cu *cu, | |
15281 | struct type *type) | |
15282 | { | |
15283 | gdb_assert (cu->language == language_ada); | |
15284 | ||
15285 | /* Check for a structure with two children. */ | |
15286 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) | |
15287 | return; | |
15288 | ||
15289 | /* Check for P_ARRAY and P_BOUNDS members. */ | |
15290 | if (TYPE_FIELD_NAME (type, 0) == NULL | |
15291 | || strcmp (TYPE_FIELD_NAME (type, 0), "P_ARRAY") != 0 | |
15292 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15293 | || strcmp (TYPE_FIELD_NAME (type, 1), "P_BOUNDS") != 0) | |
15294 | return; | |
15295 | ||
15296 | /* Make sure we're looking at a pointer to an array. */ | |
15297 | if (type->field (0).type ()->code () != TYPE_CODE_PTR) | |
15298 | return; | |
57567375 | 15299 | |
e26624c6 TT |
15300 | /* The Ada code already knows how to handle these types, so all that |
15301 | we need to do is turn the bounds into static bounds. However, we | |
15302 | don't want to rewrite existing array or index types in-place, | |
15303 | because those may be referenced in other contexts where this | |
15304 | rewriting is undesirable. */ | |
15305 | struct type *new_ary_type | |
15306 | = rewrite_array_type (TYPE_TARGET_TYPE (type->field (0).type ())); | |
15307 | if (new_ary_type != nullptr) | |
15308 | type->field (0).set_type (lookup_pointer_type (new_ary_type)); | |
57567375 TT |
15309 | } |
15310 | ||
2b4424c3 TT |
15311 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15312 | appropriate error checking and issuing complaints if there is a | |
15313 | problem. */ | |
15314 | ||
15315 | static ULONGEST | |
15316 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15317 | { | |
15318 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15319 | ||
15320 | if (attr == nullptr) | |
15321 | return 0; | |
15322 | ||
cd6c91b4 | 15323 | if (!attr->form_is_constant ()) |
2b4424c3 | 15324 | { |
b98664d3 | 15325 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15326 | " - DIE at %s [in module %s]"), |
15327 | sect_offset_str (die->sect_off), | |
5e22e966 | 15328 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15329 | return 0; |
15330 | } | |
15331 | ||
529908cb TT |
15332 | LONGEST val = attr->constant_value (0); |
15333 | if (val < 0) | |
2b4424c3 | 15334 | { |
529908cb TT |
15335 | complaint (_("DW_AT_alignment value must not be negative" |
15336 | " - DIE at %s [in module %s]"), | |
15337 | sect_offset_str (die->sect_off), | |
15338 | objfile_name (cu->per_objfile->objfile)); | |
15339 | return 0; | |
2b4424c3 | 15340 | } |
529908cb | 15341 | ULONGEST align = val; |
2b4424c3 TT |
15342 | |
15343 | if (align == 0) | |
15344 | { | |
b98664d3 | 15345 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15346 | " - DIE at %s [in module %s]"), |
15347 | sect_offset_str (die->sect_off), | |
5e22e966 | 15348 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15349 | return 0; |
15350 | } | |
15351 | if ((align & (align - 1)) != 0) | |
15352 | { | |
b98664d3 | 15353 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15354 | " - DIE at %s [in module %s]"), |
15355 | sect_offset_str (die->sect_off), | |
5e22e966 | 15356 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15357 | return 0; |
15358 | } | |
15359 | ||
15360 | return align; | |
15361 | } | |
15362 | ||
15363 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15364 | the alignment for TYPE. */ | |
15365 | ||
15366 | static void | |
15367 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15368 | struct type *type) | |
15369 | { | |
15370 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15371 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15372 | " - DIE at %s [in module %s]"), |
15373 | sect_offset_str (die->sect_off), | |
5e22e966 | 15374 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 | 15375 | } |
685b1105 | 15376 | |
e35000a7 TBA |
15377 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15378 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
15379 | ||
15380 | static bool | |
15381 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
15382 | { | |
15383 | switch (value) | |
15384 | { | |
15385 | case DW_CC_normal: | |
15386 | case DW_CC_pass_by_reference: | |
15387 | case DW_CC_pass_by_value: | |
15388 | return true; | |
15389 | ||
15390 | default: | |
15391 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15392 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
15393 | return false; |
15394 | } | |
15395 | } | |
15396 | ||
d0922fcf TBA |
15397 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15398 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
15399 | also according to GNU-specific values (see include/dwarf2.h). */ | |
15400 | ||
15401 | static bool | |
15402 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15403 | { | |
15404 | switch (value) | |
15405 | { | |
15406 | case DW_CC_normal: | |
15407 | case DW_CC_program: | |
15408 | case DW_CC_nocall: | |
15409 | return true; | |
15410 | ||
15411 | case DW_CC_GNU_renesas_sh: | |
15412 | case DW_CC_GNU_borland_fastcall_i386: | |
15413 | case DW_CC_GDB_IBM_OpenCL: | |
15414 | return true; | |
15415 | ||
15416 | default: | |
15417 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15418 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15419 | return false; |
15420 | } | |
15421 | } | |
15422 | ||
c906108c | 15423 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15424 | (definition) to create a type for the structure or union. Fill in |
15425 | the type's name and general properties; the members will not be | |
83655187 DE |
15426 | processed until process_structure_scope. A symbol table entry for |
15427 | the type will also not be done until process_structure_scope (assuming | |
15428 | the type has a name). | |
c906108c | 15429 | |
c767944b DJ |
15430 | NOTE: we need to call these functions regardless of whether or not the |
15431 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15432 | structure or union. This gets the type entered into our set of |
83655187 | 15433 | user defined types. */ |
c906108c | 15434 | |
f792889a | 15435 | static struct type * |
134d01f1 | 15436 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15437 | { |
5e22e966 | 15438 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c SS |
15439 | struct type *type; |
15440 | struct attribute *attr; | |
15d034d0 | 15441 | const char *name; |
c906108c | 15442 | |
348e048f DE |
15443 | /* If the definition of this type lives in .debug_types, read that type. |
15444 | Don't follow DW_AT_specification though, that will take us back up | |
15445 | the chain and we want to go down. */ | |
052c8bb8 | 15446 | attr = die->attr (DW_AT_signature); |
435d3d88 | 15447 | if (attr != nullptr) |
348e048f | 15448 | { |
ac9ec31b | 15449 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15450 | |
ac9ec31b | 15451 | /* The type's CU may not be the same as CU. |
02142a6c | 15452 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15453 | return set_die_type (die, type, cu); |
15454 | } | |
15455 | ||
c0dd20ea | 15456 | type = alloc_type (objfile); |
c906108c | 15457 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15458 | |
39cbfefa DJ |
15459 | name = dwarf2_name (die, cu); |
15460 | if (name != NULL) | |
c906108c | 15461 | { |
987504bb | 15462 | if (cu->language == language_cplus |
c44af4eb TT |
15463 | || cu->language == language_d |
15464 | || cu->language == language_rust) | |
63d06c5c | 15465 | { |
15d034d0 | 15466 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15467 | |
15468 | /* dwarf2_full_name might have already finished building the DIE's | |
15469 | type. If so, there is no need to continue. */ | |
15470 | if (get_die_type (die, cu) != NULL) | |
15471 | return get_die_type (die, cu); | |
15472 | ||
d0e39ea2 | 15473 | type->set_name (full_name); |
63d06c5c DC |
15474 | } |
15475 | else | |
15476 | { | |
d8151005 DJ |
15477 | /* The name is already allocated along with this objfile, so |
15478 | we don't need to duplicate it for the type. */ | |
d0e39ea2 | 15479 | type->set_name (name); |
63d06c5c | 15480 | } |
c906108c SS |
15481 | } |
15482 | ||
15483 | if (die->tag == DW_TAG_structure_type) | |
15484 | { | |
67607e24 | 15485 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15486 | } |
15487 | else if (die->tag == DW_TAG_union_type) | |
15488 | { | |
67607e24 | 15489 | type->set_code (TYPE_CODE_UNION); |
c906108c SS |
15490 | } |
15491 | else | |
15492 | { | |
67607e24 | 15493 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15494 | } |
15495 | ||
0cc2414c | 15496 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
aa70e35c | 15497 | type->set_is_declared_class (true); |
0cc2414c | 15498 | |
e35000a7 TBA |
15499 | /* Store the calling convention in the type if it's available in |
15500 | the die. Otherwise the calling convention remains set to | |
15501 | the default value DW_CC_normal. */ | |
15502 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15503 | if (attr != nullptr | |
529908cb | 15504 | && is_valid_DW_AT_calling_convention_for_type (attr->constant_value (0))) |
e35000a7 TBA |
15505 | { |
15506 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15507 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
529908cb | 15508 | = (enum dwarf_calling_convention) (attr->constant_value (0)); |
e35000a7 TBA |
15509 | } |
15510 | ||
e142c38c | 15511 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15512 | if (attr != nullptr) |
c906108c | 15513 | { |
cd6c91b4 | 15514 | if (attr->form_is_constant ()) |
dda83cd7 | 15515 | TYPE_LENGTH (type) = attr->constant_value (0); |
155bfbd3 JB |
15516 | else |
15517 | { | |
f8e89861 | 15518 | struct dynamic_prop prop; |
293e7e51 | 15519 | if (attr_to_dynamic_prop (attr, die, cu, &prop, cu->addr_type ())) |
5c54719c | 15520 | type->add_dyn_prop (DYN_PROP_BYTE_SIZE, prop); |
dda83cd7 | 15521 | TYPE_LENGTH (type) = 0; |
155bfbd3 | 15522 | } |
c906108c SS |
15523 | } |
15524 | else | |
15525 | { | |
15526 | TYPE_LENGTH (type) = 0; | |
15527 | } | |
15528 | ||
2b4424c3 TT |
15529 | maybe_set_alignment (cu, die, type); |
15530 | ||
5230b05a | 15531 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15532 | { |
5230b05a WT |
15533 | /* ICC<14 does not output the required DW_AT_declaration on |
15534 | incomplete types, but gives them a size of zero. */ | |
b4b73759 | 15535 | type->set_is_stub (true); |
685b1105 JK |
15536 | } |
15537 | else | |
9baccff6 | 15538 | type->set_stub_is_supported (true); |
685b1105 | 15539 | |
dc718098 | 15540 | if (die_is_declaration (die, cu)) |
b4b73759 | 15541 | type->set_is_stub (true); |
a6c727b2 DJ |
15542 | else if (attr == NULL && die->child == NULL |
15543 | && producer_is_realview (cu->producer)) | |
15544 | /* RealView does not output the required DW_AT_declaration | |
15545 | on incomplete types. */ | |
b4b73759 | 15546 | type->set_is_stub (true); |
dc718098 | 15547 | |
c906108c SS |
15548 | /* We need to add the type field to the die immediately so we don't |
15549 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15550 | type within the structure itself. */ |
1c379e20 | 15551 | set_die_type (die, type, cu); |
c906108c | 15552 | |
7e314c57 JK |
15553 | /* set_die_type should be already done. */ |
15554 | set_descriptive_type (type, die, cu); | |
15555 | ||
c767944b DJ |
15556 | return type; |
15557 | } | |
15558 | ||
9c6a1327 TT |
15559 | static void handle_struct_member_die |
15560 | (struct die_info *child_die, | |
15561 | struct type *type, | |
15562 | struct field_info *fi, | |
15563 | std::vector<struct symbol *> *template_args, | |
15564 | struct dwarf2_cu *cu); | |
15565 | ||
15566 | /* A helper for handle_struct_member_die that handles | |
15567 | DW_TAG_variant_part. */ | |
15568 | ||
15569 | static void | |
15570 | handle_variant_part (struct die_info *die, struct type *type, | |
15571 | struct field_info *fi, | |
15572 | std::vector<struct symbol *> *template_args, | |
15573 | struct dwarf2_cu *cu) | |
15574 | { | |
15575 | variant_part_builder *new_part; | |
15576 | if (fi->current_variant_part == nullptr) | |
15577 | { | |
15578 | fi->variant_parts.emplace_back (); | |
15579 | new_part = &fi->variant_parts.back (); | |
15580 | } | |
15581 | else if (!fi->current_variant_part->processing_variant) | |
15582 | { | |
15583 | complaint (_("nested DW_TAG_variant_part seen " | |
15584 | "- DIE at %s [in module %s]"), | |
15585 | sect_offset_str (die->sect_off), | |
5e22e966 | 15586 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15587 | return; |
15588 | } | |
15589 | else | |
15590 | { | |
15591 | variant_field ¤t = fi->current_variant_part->variants.back (); | |
15592 | current.variant_parts.emplace_back (); | |
15593 | new_part = ¤t.variant_parts.back (); | |
15594 | } | |
15595 | ||
15596 | /* When we recurse, we want callees to add to this new variant | |
15597 | part. */ | |
15598 | scoped_restore save_current_variant_part | |
15599 | = make_scoped_restore (&fi->current_variant_part, new_part); | |
15600 | ||
15601 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15602 | if (discr == NULL) | |
15603 | { | |
15604 | /* It's a univariant form, an extension we support. */ | |
15605 | } | |
15606 | else if (discr->form_is_ref ()) | |
15607 | { | |
15608 | struct dwarf2_cu *target_cu = cu; | |
15609 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15610 | ||
15611 | new_part->discriminant_offset = target_die->sect_off; | |
15612 | } | |
15613 | else | |
15614 | { | |
15615 | complaint (_("DW_AT_discr does not have DIE reference form" | |
15616 | " - DIE at %s [in module %s]"), | |
15617 | sect_offset_str (die->sect_off), | |
5e22e966 | 15618 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15619 | } |
15620 | ||
15621 | for (die_info *child_die = die->child; | |
15622 | child_die != NULL; | |
15623 | child_die = child_die->sibling) | |
15624 | handle_struct_member_die (child_die, type, fi, template_args, cu); | |
15625 | } | |
15626 | ||
15627 | /* A helper for handle_struct_member_die that handles | |
15628 | DW_TAG_variant. */ | |
15629 | ||
15630 | static void | |
15631 | handle_variant (struct die_info *die, struct type *type, | |
15632 | struct field_info *fi, | |
15633 | std::vector<struct symbol *> *template_args, | |
15634 | struct dwarf2_cu *cu) | |
15635 | { | |
15636 | if (fi->current_variant_part == nullptr) | |
15637 | { | |
15638 | complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part " | |
15639 | "- DIE at %s [in module %s]"), | |
15640 | sect_offset_str (die->sect_off), | |
5e22e966 | 15641 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15642 | return; |
15643 | } | |
15644 | if (fi->current_variant_part->processing_variant) | |
15645 | { | |
15646 | complaint (_("nested DW_TAG_variant seen " | |
15647 | "- DIE at %s [in module %s]"), | |
15648 | sect_offset_str (die->sect_off), | |
5e22e966 | 15649 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15650 | return; |
15651 | } | |
15652 | ||
15653 | scoped_restore save_processing_variant | |
15654 | = make_scoped_restore (&fi->current_variant_part->processing_variant, | |
15655 | true); | |
15656 | ||
15657 | fi->current_variant_part->variants.emplace_back (); | |
15658 | variant_field &variant = fi->current_variant_part->variants.back (); | |
15659 | variant.first_field = fi->fields.size (); | |
15660 | ||
15661 | /* In a variant we want to get the discriminant and also add a | |
15662 | field for our sole member child. */ | |
15663 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr_value, cu); | |
cae21f8e | 15664 | if (discr == nullptr || !discr->form_is_constant ()) |
9c6a1327 TT |
15665 | { |
15666 | discr = dwarf2_attr (die, DW_AT_discr_list, cu); | |
9d2246fc | 15667 | if (discr == nullptr || discr->as_block ()->size == 0) |
9c6a1327 TT |
15668 | variant.default_branch = true; |
15669 | else | |
9d2246fc | 15670 | variant.discr_list_data = discr->as_block (); |
9c6a1327 TT |
15671 | } |
15672 | else | |
cae21f8e | 15673 | variant.discriminant_value = discr->constant_value (0); |
9c6a1327 TT |
15674 | |
15675 | for (die_info *variant_child = die->child; | |
15676 | variant_child != NULL; | |
15677 | variant_child = variant_child->sibling) | |
15678 | handle_struct_member_die (variant_child, type, fi, template_args, cu); | |
15679 | ||
15680 | variant.last_field = fi->fields.size (); | |
15681 | } | |
15682 | ||
2ddeaf8a TT |
15683 | /* A helper for process_structure_scope that handles a single member |
15684 | DIE. */ | |
15685 | ||
15686 | static void | |
15687 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15688 | struct field_info *fi, | |
15689 | std::vector<struct symbol *> *template_args, | |
15690 | struct dwarf2_cu *cu) | |
15691 | { | |
15692 | if (child_die->tag == DW_TAG_member | |
9c6a1327 | 15693 | || child_die->tag == DW_TAG_variable) |
2ddeaf8a TT |
15694 | { |
15695 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15696 | should be a DW_TAG_member that is a declaration, but | |
15697 | all versions of G++ as of this writing (so through at | |
15698 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15699 | tags for them instead. */ | |
15700 | dwarf2_add_field (fi, child_die, cu); | |
15701 | } | |
15702 | else if (child_die->tag == DW_TAG_subprogram) | |
15703 | { | |
15704 | /* Rust doesn't have member functions in the C++ sense. | |
15705 | However, it does emit ordinary functions as children | |
15706 | of a struct DIE. */ | |
15707 | if (cu->language == language_rust) | |
15708 | read_func_scope (child_die, cu); | |
15709 | else | |
15710 | { | |
15711 | /* C++ member function. */ | |
15712 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15713 | } | |
15714 | } | |
15715 | else if (child_die->tag == DW_TAG_inheritance) | |
15716 | { | |
15717 | /* C++ base class field. */ | |
15718 | dwarf2_add_field (fi, child_die, cu); | |
15719 | } | |
15720 | else if (type_can_define_types (child_die)) | |
15721 | dwarf2_add_type_defn (fi, child_die, cu); | |
15722 | else if (child_die->tag == DW_TAG_template_type_param | |
15723 | || child_die->tag == DW_TAG_template_value_param) | |
15724 | { | |
15725 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15726 | ||
15727 | if (arg != NULL) | |
15728 | template_args->push_back (arg); | |
15729 | } | |
9c6a1327 TT |
15730 | else if (child_die->tag == DW_TAG_variant_part) |
15731 | handle_variant_part (child_die, type, fi, template_args, cu); | |
2ddeaf8a | 15732 | else if (child_die->tag == DW_TAG_variant) |
9c6a1327 | 15733 | handle_variant (child_die, type, fi, template_args, cu); |
2ddeaf8a TT |
15734 | } |
15735 | ||
c767944b DJ |
15736 | /* Finish creating a structure or union type, including filling in |
15737 | its members and creating a symbol for it. */ | |
15738 | ||
15739 | static void | |
15740 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15741 | { | |
5e22e966 | 15742 | struct objfile *objfile = cu->per_objfile->objfile; |
ca040673 | 15743 | struct die_info *child_die; |
c767944b DJ |
15744 | struct type *type; |
15745 | ||
15746 | type = get_die_type (die, cu); | |
15747 | if (type == NULL) | |
15748 | type = read_structure_type (die, cu); | |
15749 | ||
3e1d3d8c | 15750 | bool has_template_parameters = false; |
e142c38c | 15751 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15752 | { |
15753 | struct field_info fi; | |
2f4732b0 | 15754 | std::vector<struct symbol *> template_args; |
c906108c | 15755 | |
639d11d3 | 15756 | child_die = die->child; |
c906108c SS |
15757 | |
15758 | while (child_die && child_die->tag) | |
15759 | { | |
2ddeaf8a | 15760 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
436c571c | 15761 | child_die = child_die->sibling; |
c906108c SS |
15762 | } |
15763 | ||
34eaf542 | 15764 | /* Attach template arguments to type. */ |
2f4732b0 | 15765 | if (!template_args.empty ()) |
34eaf542 | 15766 | { |
3e1d3d8c | 15767 | has_template_parameters = true; |
34eaf542 | 15768 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15769 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15770 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15771 | = XOBNEWVEC (&objfile->objfile_obstack, |
15772 | struct symbol *, | |
15773 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15774 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15775 | template_args.data (), |
34eaf542 TT |
15776 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15777 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15778 | } |
15779 | ||
c906108c | 15780 | /* Attach fields and member functions to the type. */ |
317f7127 | 15781 | if (fi.nfields () > 0) |
e7c27a73 | 15782 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15783 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15784 | { |
e7c27a73 | 15785 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15786 | |
c5aa993b | 15787 | /* Get the type which refers to the base class (possibly this |
c906108c | 15788 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15789 | class from the DW_AT_containing_type attribute. This use of |
15790 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15791 | |
e142c38c | 15792 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15793 | { |
e7c27a73 | 15794 | struct type *t = die_containing_type (die, cu); |
c906108c | 15795 | |
ae6ae975 | 15796 | set_type_vptr_basetype (type, t); |
c906108c SS |
15797 | if (type == t) |
15798 | { | |
c906108c SS |
15799 | int i; |
15800 | ||
15801 | /* Our own class provides vtbl ptr. */ | |
1f704f76 | 15802 | for (i = t->num_fields () - 1; |
c906108c SS |
15803 | i >= TYPE_N_BASECLASSES (t); |
15804 | --i) | |
15805 | { | |
0d5cff50 | 15806 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15807 | |
dda83cd7 | 15808 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15809 | { |
ae6ae975 | 15810 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15811 | break; |
15812 | } | |
15813 | } | |
15814 | ||
15815 | /* Complain if virtual function table field not found. */ | |
15816 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15817 | complaint (_("virtual function table pointer " |
3e43a32a | 15818 | "not found when defining class '%s'"), |
7d93a1e0 | 15819 | type->name () ? type->name () : ""); |
c906108c SS |
15820 | } |
15821 | else | |
15822 | { | |
ae6ae975 | 15823 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15824 | } |
15825 | } | |
f6235d4c | 15826 | else if (cu->producer |
61012eef | 15827 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15828 | { |
15829 | /* The IBM XLC compiler does not provide direct indication | |
dda83cd7 SM |
15830 | of the containing type, but the vtable pointer is |
15831 | always named __vfp. */ | |
f6235d4c EZ |
15832 | |
15833 | int i; | |
15834 | ||
1f704f76 | 15835 | for (i = type->num_fields () - 1; |
f6235d4c EZ |
15836 | i >= TYPE_N_BASECLASSES (type); |
15837 | --i) | |
15838 | { | |
15839 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15840 | { | |
ae6ae975 DE |
15841 | set_type_vptr_fieldno (type, i); |
15842 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15843 | break; |
15844 | } | |
15845 | } | |
15846 | } | |
c906108c | 15847 | } |
98751a41 JK |
15848 | |
15849 | /* Copy fi.typedef_field_list linked list elements content into the | |
15850 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15851 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15852 | { |
be2daae6 | 15853 | int count = fi.typedef_field_list.size (); |
98751a41 | 15854 | |
a0d7a4ff | 15855 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15856 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15857 | = ((struct decl_field *) |
be2daae6 TT |
15858 | TYPE_ALLOC (type, |
15859 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15860 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15861 | |
be2daae6 TT |
15862 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15863 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15864 | } |
c767944b | 15865 | |
883fd55a KS |
15866 | /* Copy fi.nested_types_list linked list elements content into the |
15867 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15868 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15869 | { |
be2daae6 | 15870 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15871 | |
15872 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15873 | TYPE_NESTED_TYPES_ARRAY (type) | |
15874 | = ((struct decl_field *) | |
be2daae6 TT |
15875 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15876 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15877 | |
be2daae6 TT |
15878 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15879 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15880 | } |
c906108c | 15881 | } |
63d06c5c | 15882 | |
bb5ed363 | 15883 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15884 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15885 | cu->rust_unions.push_back (type); | |
57567375 TT |
15886 | else if (cu->language == language_ada) |
15887 | quirk_ada_thick_pointer_struct (die, cu, type); | |
0b92b5bb | 15888 | |
90aeadfc DC |
15889 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15890 | snapshots) has been known to create a die giving a declaration | |
15891 | for a class that has, as a child, a die giving a definition for a | |
15892 | nested class. So we have to process our children even if the | |
15893 | current die is a declaration. Normally, of course, a declaration | |
15894 | won't have any children at all. */ | |
134d01f1 | 15895 | |
ca040673 DE |
15896 | child_die = die->child; |
15897 | ||
90aeadfc DC |
15898 | while (child_die != NULL && child_die->tag) |
15899 | { | |
15900 | if (child_die->tag == DW_TAG_member | |
15901 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15902 | || child_die->tag == DW_TAG_inheritance |
15903 | || child_die->tag == DW_TAG_template_value_param | |
15904 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15905 | { |
90aeadfc | 15906 | /* Do nothing. */ |
134d01f1 | 15907 | } |
90aeadfc DC |
15908 | else |
15909 | process_die (child_die, cu); | |
134d01f1 | 15910 | |
436c571c | 15911 | child_die = child_die->sibling; |
134d01f1 DJ |
15912 | } |
15913 | ||
fa4028e9 JB |
15914 | /* Do not consider external references. According to the DWARF standard, |
15915 | these DIEs are identified by the fact that they have no byte_size | |
15916 | attribute, and a declaration attribute. */ | |
15917 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15cd93d0 TV |
15918 | || !die_is_declaration (die, cu) |
15919 | || dwarf2_attr (die, DW_AT_signature, cu) != NULL) | |
3e1d3d8c TT |
15920 | { |
15921 | struct symbol *sym = new_symbol (die, type, cu); | |
15922 | ||
15923 | if (has_template_parameters) | |
15924 | { | |
a776957c TT |
15925 | struct symtab *symtab; |
15926 | if (sym != nullptr) | |
15927 | symtab = symbol_symtab (sym); | |
15928 | else if (cu->line_header != nullptr) | |
15929 | { | |
15930 | /* Any related symtab will do. */ | |
15931 | symtab | |
7ba99d21 | 15932 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15933 | } |
15934 | else | |
15935 | { | |
15936 | symtab = nullptr; | |
15937 | complaint (_("could not find suitable " | |
15938 | "symtab for template parameter" | |
15939 | " - DIE at %s [in module %s]"), | |
15940 | sect_offset_str (die->sect_off), | |
15941 | objfile_name (objfile)); | |
15942 | } | |
15943 | ||
15944 | if (symtab != nullptr) | |
15945 | { | |
15946 | /* Make sure that the symtab is set on the new symbols. | |
15947 | Even though they don't appear in this symtab directly, | |
15948 | other parts of gdb assume that symbols do, and this is | |
15949 | reasonably true. */ | |
15950 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15951 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15952 | } | |
3e1d3d8c TT |
15953 | } |
15954 | } | |
134d01f1 DJ |
15955 | } |
15956 | ||
ed6acedd TT |
15957 | /* Assuming DIE is an enumeration type, and TYPE is its associated |
15958 | type, update TYPE using some information only available in DIE's | |
15959 | children. In particular, the fields are computed. */ | |
55426c9d JB |
15960 | |
15961 | static void | |
15962 | update_enumeration_type_from_children (struct die_info *die, | |
15963 | struct type *type, | |
15964 | struct dwarf2_cu *cu) | |
15965 | { | |
60f7655a | 15966 | struct die_info *child_die; |
55426c9d JB |
15967 | int unsigned_enum = 1; |
15968 | int flag_enum = 1; | |
55426c9d | 15969 | |
8268c778 | 15970 | auto_obstack obstack; |
ed6acedd | 15971 | std::vector<struct field> fields; |
55426c9d | 15972 | |
60f7655a DE |
15973 | for (child_die = die->child; |
15974 | child_die != NULL && child_die->tag; | |
436c571c | 15975 | child_die = child_die->sibling) |
55426c9d JB |
15976 | { |
15977 | struct attribute *attr; | |
15978 | LONGEST value; | |
15979 | const gdb_byte *bytes; | |
15980 | struct dwarf2_locexpr_baton *baton; | |
15981 | const char *name; | |
60f7655a | 15982 | |
55426c9d JB |
15983 | if (child_die->tag != DW_TAG_enumerator) |
15984 | continue; | |
15985 | ||
15986 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
15987 | if (attr == NULL) | |
15988 | continue; | |
15989 | ||
15990 | name = dwarf2_name (child_die, cu); | |
15991 | if (name == NULL) | |
15992 | name = "<anonymous enumerator>"; | |
15993 | ||
15994 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
15995 | &value, &bytes, &baton); | |
15996 | if (value < 0) | |
15997 | { | |
15998 | unsigned_enum = 0; | |
15999 | flag_enum = 0; | |
16000 | } | |
55426c9d | 16001 | else |
edd45eb0 SM |
16002 | { |
16003 | if (count_one_bits_ll (value) >= 2) | |
16004 | flag_enum = 0; | |
edd45eb0 | 16005 | } |
55426c9d | 16006 | |
ed6acedd TT |
16007 | fields.emplace_back (); |
16008 | struct field &field = fields.back (); | |
16009 | FIELD_NAME (field) = dwarf2_physname (name, child_die, cu); | |
16010 | SET_FIELD_ENUMVAL (field, value); | |
16011 | } | |
16012 | ||
16013 | if (!fields.empty ()) | |
16014 | { | |
5e33d5f4 | 16015 | type->set_num_fields (fields.size ()); |
3cabb6b0 SM |
16016 | type->set_fields |
16017 | ((struct field *) | |
16018 | TYPE_ALLOC (type, sizeof (struct field) * fields.size ())); | |
80fc5e77 | 16019 | memcpy (type->fields (), fields.data (), |
ed6acedd | 16020 | sizeof (struct field) * fields.size ()); |
55426c9d JB |
16021 | } |
16022 | ||
16023 | if (unsigned_enum) | |
653223d3 SM |
16024 | type->set_is_unsigned (true); |
16025 | ||
55426c9d | 16026 | if (flag_enum) |
9902b327 | 16027 | type->set_is_flag_enum (true); |
55426c9d JB |
16028 | } |
16029 | ||
134d01f1 DJ |
16030 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16031 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16032 | |
f792889a | 16033 | static struct type * |
134d01f1 | 16034 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16035 | { |
5e22e966 | 16036 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 16037 | struct type *type; |
c906108c | 16038 | struct attribute *attr; |
0114d602 | 16039 | const char *name; |
134d01f1 | 16040 | |
348e048f DE |
16041 | /* If the definition of this type lives in .debug_types, read that type. |
16042 | Don't follow DW_AT_specification though, that will take us back up | |
16043 | the chain and we want to go down. */ | |
052c8bb8 | 16044 | attr = die->attr (DW_AT_signature); |
435d3d88 | 16045 | if (attr != nullptr) |
348e048f | 16046 | { |
ac9ec31b | 16047 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16048 | |
ac9ec31b | 16049 | /* The type's CU may not be the same as CU. |
02142a6c | 16050 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16051 | return set_die_type (die, type, cu); |
16052 | } | |
16053 | ||
c906108c SS |
16054 | type = alloc_type (objfile); |
16055 | ||
67607e24 | 16056 | type->set_code (TYPE_CODE_ENUM); |
94af9270 | 16057 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16058 | if (name != NULL) |
d0e39ea2 | 16059 | type->set_name (name); |
c906108c | 16060 | |
0626fc76 TT |
16061 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16062 | if (attr != NULL) | |
16063 | { | |
16064 | struct type *underlying_type = die_type (die, cu); | |
16065 | ||
16066 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16067 | } | |
16068 | ||
e142c38c | 16069 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16070 | if (attr != nullptr) |
c906108c | 16071 | { |
529908cb | 16072 | TYPE_LENGTH (type) = attr->constant_value (0); |
c906108c SS |
16073 | } |
16074 | else | |
16075 | { | |
16076 | TYPE_LENGTH (type) = 0; | |
16077 | } | |
16078 | ||
2b4424c3 TT |
16079 | maybe_set_alignment (cu, die, type); |
16080 | ||
137033e9 JB |
16081 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16082 | declared as private in the package spec, and then defined only | |
16083 | inside the package body. Such types are known as Taft Amendment | |
16084 | Types. When another package uses such a type, an incomplete DIE | |
16085 | may be generated by the compiler. */ | |
02eb380e | 16086 | if (die_is_declaration (die, cu)) |
b4b73759 | 16087 | type->set_is_stub (true); |
02eb380e | 16088 | |
0626fc76 TT |
16089 | /* If this type has an underlying type that is not a stub, then we |
16090 | may use its attributes. We always use the "unsigned" attribute | |
16091 | in this situation, because ordinarily we guess whether the type | |
16092 | is unsigned -- but the guess can be wrong and the underlying type | |
16093 | can tell us the reality. However, we defer to a local size | |
16094 | attribute if one exists, because this lets the compiler override | |
16095 | the underlying type if needed. */ | |
e46d3488 | 16096 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_TARGET_TYPE (type)->is_stub ()) |
0626fc76 | 16097 | { |
9e7c9a03 HD |
16098 | struct type *underlying_type = TYPE_TARGET_TYPE (type); |
16099 | underlying_type = check_typedef (underlying_type); | |
653223d3 SM |
16100 | |
16101 | type->set_is_unsigned (underlying_type->is_unsigned ()); | |
16102 | ||
0626fc76 | 16103 | if (TYPE_LENGTH (type) == 0) |
9e7c9a03 | 16104 | TYPE_LENGTH (type) = TYPE_LENGTH (underlying_type); |
653223d3 | 16105 | |
2b4424c3 | 16106 | if (TYPE_RAW_ALIGN (type) == 0 |
9e7c9a03 HD |
16107 | && TYPE_RAW_ALIGN (underlying_type) != 0) |
16108 | set_type_align (type, TYPE_RAW_ALIGN (underlying_type)); | |
0626fc76 TT |
16109 | } |
16110 | ||
aa70e35c | 16111 | type->set_is_declared_class (dwarf2_flag_true_p (die, DW_AT_enum_class, cu)); |
3d567982 | 16112 | |
ed6acedd TT |
16113 | set_die_type (die, type, cu); |
16114 | ||
16115 | /* Finish the creation of this type by using the enum's children. | |
16116 | Note that, as usual, this must come after set_die_type to avoid | |
16117 | infinite recursion when trying to compute the names of the | |
16118 | enumerators. */ | |
16119 | update_enumeration_type_from_children (die, type, cu); | |
16120 | ||
16121 | return type; | |
134d01f1 DJ |
16122 | } |
16123 | ||
16124 | /* Given a pointer to a die which begins an enumeration, process all | |
16125 | the dies that define the members of the enumeration, and create the | |
16126 | symbol for the enumeration type. | |
16127 | ||
16128 | NOTE: We reverse the order of the element list. */ | |
16129 | ||
16130 | static void | |
16131 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16132 | { | |
f792889a | 16133 | struct type *this_type; |
134d01f1 | 16134 | |
f792889a DJ |
16135 | this_type = get_die_type (die, cu); |
16136 | if (this_type == NULL) | |
16137 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16138 | |
639d11d3 | 16139 | if (die->child != NULL) |
c906108c | 16140 | { |
9dc481d3 | 16141 | struct die_info *child_die; |
15d034d0 | 16142 | const char *name; |
9dc481d3 | 16143 | |
639d11d3 | 16144 | child_die = die->child; |
c906108c SS |
16145 | while (child_die && child_die->tag) |
16146 | { | |
16147 | if (child_die->tag != DW_TAG_enumerator) | |
16148 | { | |
e7c27a73 | 16149 | process_die (child_die, cu); |
c906108c SS |
16150 | } |
16151 | else | |
16152 | { | |
39cbfefa DJ |
16153 | name = dwarf2_name (child_die, cu); |
16154 | if (name) | |
ed6acedd | 16155 | new_symbol (child_die, this_type, cu); |
c906108c SS |
16156 | } |
16157 | ||
436c571c | 16158 | child_die = child_die->sibling; |
c906108c | 16159 | } |
c906108c | 16160 | } |
134d01f1 | 16161 | |
6c83ed52 TT |
16162 | /* If we are reading an enum from a .debug_types unit, and the enum |
16163 | is a declaration, and the enum is not the signatured type in the | |
16164 | unit, then we do not want to add a symbol for it. Adding a | |
16165 | symbol would in some cases obscure the true definition of the | |
16166 | enum, giving users an incomplete type when the definition is | |
16167 | actually available. Note that we do not want to do this for all | |
16168 | enums which are just declarations, because C++0x allows forward | |
16169 | enum declarations. */ | |
3019eac3 | 16170 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16171 | && die_is_declaration (die, cu)) |
16172 | { | |
52dc124a | 16173 | struct signatured_type *sig_type; |
6c83ed52 | 16174 | |
c0f78cd4 | 16175 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16176 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16177 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16178 | return; |
16179 | } | |
16180 | ||
f792889a | 16181 | new_symbol (die, this_type, cu); |
c906108c SS |
16182 | } |
16183 | ||
57567375 TT |
16184 | /* Helper function for quirk_ada_thick_pointer that examines a bounds |
16185 | expression for an index type and finds the corresponding field | |
16186 | offset in the hidden "P_BOUNDS" structure. Returns true on success | |
16187 | and updates *FIELD, false if it fails to recognize an | |
16188 | expression. */ | |
16189 | ||
16190 | static bool | |
16191 | recognize_bound_expression (struct die_info *die, enum dwarf_attribute name, | |
16192 | int *bounds_offset, struct field *field, | |
16193 | struct dwarf2_cu *cu) | |
16194 | { | |
16195 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
16196 | if (attr == nullptr || !attr->form_is_block ()) | |
16197 | return false; | |
16198 | ||
16199 | const struct dwarf_block *block = attr->as_block (); | |
16200 | const gdb_byte *start = block->data; | |
16201 | const gdb_byte *end = block->data + block->size; | |
16202 | ||
16203 | /* The expression to recognize generally looks like: | |
16204 | ||
16205 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16206 | DW_OP_plus_uconst: 4; DW_OP_deref_size: 4) | |
16207 | ||
16208 | However, the second "plus_uconst" may be missing: | |
16209 | ||
16210 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16211 | DW_OP_deref_size: 4) | |
16212 | ||
16213 | This happens when the field is at the start of the structure. | |
16214 | ||
16215 | Also, the final deref may not be sized: | |
16216 | ||
16217 | (DW_OP_push_object_address; DW_OP_plus_uconst: 4; DW_OP_deref; | |
16218 | DW_OP_deref) | |
16219 | ||
16220 | This happens when the size of the index type happens to be the | |
16221 | same as the architecture's word size. This can occur with or | |
16222 | without the second plus_uconst. */ | |
16223 | ||
16224 | if (end - start < 2) | |
16225 | return false; | |
16226 | if (*start++ != DW_OP_push_object_address) | |
16227 | return false; | |
16228 | if (*start++ != DW_OP_plus_uconst) | |
16229 | return false; | |
16230 | ||
16231 | uint64_t this_bound_off; | |
16232 | start = gdb_read_uleb128 (start, end, &this_bound_off); | |
16233 | if (start == nullptr || (int) this_bound_off != this_bound_off) | |
16234 | return false; | |
16235 | /* Update *BOUNDS_OFFSET if needed, or alternatively verify that it | |
16236 | is consistent among all bounds. */ | |
16237 | if (*bounds_offset == -1) | |
16238 | *bounds_offset = this_bound_off; | |
16239 | else if (*bounds_offset != this_bound_off) | |
16240 | return false; | |
16241 | ||
16242 | if (start == end || *start++ != DW_OP_deref) | |
16243 | return false; | |
16244 | ||
16245 | int offset = 0; | |
16246 | if (start ==end) | |
16247 | return false; | |
16248 | else if (*start == DW_OP_deref_size || *start == DW_OP_deref) | |
16249 | { | |
16250 | /* This means an offset of 0. */ | |
16251 | } | |
16252 | else if (*start++ != DW_OP_plus_uconst) | |
16253 | return false; | |
16254 | else | |
16255 | { | |
16256 | /* The size is the parameter to DW_OP_plus_uconst. */ | |
16257 | uint64_t val; | |
16258 | start = gdb_read_uleb128 (start, end, &val); | |
16259 | if (start == nullptr) | |
16260 | return false; | |
16261 | if ((int) val != val) | |
16262 | return false; | |
16263 | offset = val; | |
16264 | } | |
16265 | ||
16266 | if (start == end) | |
16267 | return false; | |
16268 | ||
16269 | uint64_t size; | |
16270 | if (*start == DW_OP_deref_size) | |
16271 | { | |
16272 | start = gdb_read_uleb128 (start + 1, end, &size); | |
16273 | if (start == nullptr) | |
16274 | return false; | |
16275 | } | |
16276 | else if (*start == DW_OP_deref) | |
16277 | { | |
16278 | size = cu->header.addr_size; | |
16279 | ++start; | |
16280 | } | |
16281 | else | |
16282 | return false; | |
16283 | ||
16284 | SET_FIELD_BITPOS (*field, 8 * offset); | |
16285 | if (size != TYPE_LENGTH (field->type ())) | |
16286 | FIELD_BITSIZE (*field) = 8 * size; | |
16287 | ||
16288 | return true; | |
16289 | } | |
16290 | ||
16291 | /* With -fgnat-encodings=minimal, gcc will emit some unusual DWARF for | |
16292 | some kinds of Ada arrays: | |
16293 | ||
16294 | <1><11db>: Abbrev Number: 7 (DW_TAG_array_type) | |
16295 | <11dc> DW_AT_name : (indirect string, offset: 0x1bb8): string | |
16296 | <11e0> DW_AT_data_location: 2 byte block: 97 6 | |
16297 | (DW_OP_push_object_address; DW_OP_deref) | |
16298 | <11e3> DW_AT_type : <0x1173> | |
16299 | <11e7> DW_AT_sibling : <0x1201> | |
16300 | <2><11eb>: Abbrev Number: 8 (DW_TAG_subrange_type) | |
16301 | <11ec> DW_AT_type : <0x1206> | |
16302 | <11f0> DW_AT_lower_bound : 6 byte block: 97 23 8 6 94 4 | |
16303 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16304 | DW_OP_deref_size: 4) | |
16305 | <11f7> DW_AT_upper_bound : 8 byte block: 97 23 8 6 23 4 94 4 | |
16306 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16307 | DW_OP_plus_uconst: 4; DW_OP_deref_size: 4) | |
16308 | ||
16309 | This actually represents a "thick pointer", which is a structure | |
16310 | with two elements: one that is a pointer to the array data, and one | |
16311 | that is a pointer to another structure; this second structure holds | |
16312 | the array bounds. | |
16313 | ||
16314 | This returns a new type on success, or nullptr if this didn't | |
16315 | recognize the type. */ | |
16316 | ||
16317 | static struct type * | |
16318 | quirk_ada_thick_pointer (struct die_info *die, struct dwarf2_cu *cu, | |
16319 | struct type *type) | |
16320 | { | |
16321 | struct attribute *attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
16322 | /* So far we've only seen this with block form. */ | |
16323 | if (attr == nullptr || !attr->form_is_block ()) | |
16324 | return nullptr; | |
16325 | ||
16326 | /* Note that this will fail if the structure layout is changed by | |
16327 | the compiler. However, we have no good way to recognize some | |
16328 | other layout, because we don't know what expression the compiler | |
16329 | might choose to emit should this happen. */ | |
16330 | struct dwarf_block *blk = attr->as_block (); | |
16331 | if (blk->size != 2 | |
16332 | || blk->data[0] != DW_OP_push_object_address | |
16333 | || blk->data[1] != DW_OP_deref) | |
16334 | return nullptr; | |
16335 | ||
16336 | int bounds_offset = -1; | |
16337 | int max_align = -1; | |
16338 | std::vector<struct field> range_fields; | |
16339 | for (struct die_info *child_die = die->child; | |
16340 | child_die; | |
16341 | child_die = child_die->sibling) | |
16342 | { | |
16343 | if (child_die->tag == DW_TAG_subrange_type) | |
16344 | { | |
16345 | struct type *underlying = read_subrange_index_type (child_die, cu); | |
16346 | ||
16347 | int this_align = type_align (underlying); | |
16348 | if (this_align > max_align) | |
16349 | max_align = this_align; | |
16350 | ||
16351 | range_fields.emplace_back (); | |
16352 | range_fields.emplace_back (); | |
16353 | ||
16354 | struct field &lower = range_fields[range_fields.size () - 2]; | |
16355 | struct field &upper = range_fields[range_fields.size () - 1]; | |
16356 | ||
16357 | lower.set_type (underlying); | |
16358 | FIELD_ARTIFICIAL (lower) = 1; | |
16359 | ||
16360 | upper.set_type (underlying); | |
16361 | FIELD_ARTIFICIAL (upper) = 1; | |
16362 | ||
16363 | if (!recognize_bound_expression (child_die, DW_AT_lower_bound, | |
16364 | &bounds_offset, &lower, cu) | |
16365 | || !recognize_bound_expression (child_die, DW_AT_upper_bound, | |
16366 | &bounds_offset, &upper, cu)) | |
16367 | return nullptr; | |
16368 | } | |
16369 | } | |
16370 | ||
16371 | /* This shouldn't really happen, but double-check that we found | |
16372 | where the bounds are stored. */ | |
16373 | if (bounds_offset == -1) | |
16374 | return nullptr; | |
16375 | ||
16376 | struct objfile *objfile = cu->per_objfile->objfile; | |
16377 | for (int i = 0; i < range_fields.size (); i += 2) | |
16378 | { | |
16379 | char name[20]; | |
16380 | ||
16381 | /* Set the name of each field in the bounds. */ | |
16382 | xsnprintf (name, sizeof (name), "LB%d", i / 2); | |
16383 | FIELD_NAME (range_fields[i]) = objfile->intern (name); | |
16384 | xsnprintf (name, sizeof (name), "UB%d", i / 2); | |
16385 | FIELD_NAME (range_fields[i + 1]) = objfile->intern (name); | |
16386 | } | |
16387 | ||
16388 | struct type *bounds = alloc_type (objfile); | |
16389 | bounds->set_code (TYPE_CODE_STRUCT); | |
16390 | ||
16391 | bounds->set_num_fields (range_fields.size ()); | |
16392 | bounds->set_fields | |
16393 | ((struct field *) TYPE_ALLOC (bounds, (bounds->num_fields () | |
16394 | * sizeof (struct field)))); | |
16395 | memcpy (bounds->fields (), range_fields.data (), | |
16396 | bounds->num_fields () * sizeof (struct field)); | |
16397 | ||
16398 | int last_fieldno = range_fields.size () - 1; | |
16399 | int bounds_size = (TYPE_FIELD_BITPOS (bounds, last_fieldno) / 8 | |
16400 | + TYPE_LENGTH (bounds->field (last_fieldno).type ())); | |
16401 | TYPE_LENGTH (bounds) = align_up (bounds_size, max_align); | |
16402 | ||
16403 | /* Rewrite the existing array type in place. Specifically, we | |
16404 | remove any dynamic properties we might have read, and we replace | |
16405 | the index types. */ | |
16406 | struct type *iter = type; | |
16407 | for (int i = 0; i < range_fields.size (); i += 2) | |
16408 | { | |
16409 | gdb_assert (iter->code () == TYPE_CODE_ARRAY); | |
16410 | iter->main_type->dyn_prop_list = nullptr; | |
16411 | iter->set_index_type | |
16412 | (create_static_range_type (NULL, bounds->field (i).type (), 1, 0)); | |
16413 | iter = TYPE_TARGET_TYPE (iter); | |
16414 | } | |
16415 | ||
16416 | struct type *result = alloc_type (objfile); | |
16417 | result->set_code (TYPE_CODE_STRUCT); | |
16418 | ||
16419 | result->set_num_fields (2); | |
16420 | result->set_fields | |
16421 | ((struct field *) TYPE_ZALLOC (result, (result->num_fields () | |
16422 | * sizeof (struct field)))); | |
16423 | ||
16424 | /* The names are chosen to coincide with what the compiler does with | |
16425 | -fgnat-encodings=all, which the Ada code in gdb already | |
16426 | understands. */ | |
16427 | TYPE_FIELD_NAME (result, 0) = "P_ARRAY"; | |
16428 | result->field (0).set_type (lookup_pointer_type (type)); | |
16429 | ||
16430 | TYPE_FIELD_NAME (result, 1) = "P_BOUNDS"; | |
16431 | result->field (1).set_type (lookup_pointer_type (bounds)); | |
16432 | SET_FIELD_BITPOS (result->field (1), 8 * bounds_offset); | |
16433 | ||
16434 | result->set_name (type->name ()); | |
16435 | TYPE_LENGTH (result) = (TYPE_LENGTH (result->field (0).type ()) | |
16436 | + TYPE_LENGTH (result->field (1).type ())); | |
16437 | ||
16438 | return result; | |
16439 | } | |
16440 | ||
c906108c SS |
16441 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
16442 | the DIE's type field. For now, this only handles one dimensional | |
16443 | arrays. */ | |
16444 | ||
f792889a | 16445 | static struct type * |
e7c27a73 | 16446 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16447 | { |
5e22e966 | 16448 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 16449 | struct die_info *child_die; |
7e314c57 | 16450 | struct type *type; |
c906108c | 16451 | struct type *element_type, *range_type, *index_type; |
c906108c | 16452 | struct attribute *attr; |
15d034d0 | 16453 | const char *name; |
a405673c | 16454 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16455 | unsigned int bit_stride = 0; |
c906108c | 16456 | |
e7c27a73 | 16457 | element_type = die_type (die, cu); |
c906108c | 16458 | |
7e314c57 JK |
16459 | /* The die_type call above may have already set the type for this DIE. */ |
16460 | type = get_die_type (die, cu); | |
16461 | if (type) | |
16462 | return type; | |
16463 | ||
dc53a7ad JB |
16464 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16465 | if (attr != NULL) | |
a405673c JB |
16466 | { |
16467 | int stride_ok; | |
293e7e51 | 16468 | struct type *prop_type = cu->addr_sized_int_type (false); |
a405673c JB |
16469 | |
16470 | byte_stride_prop | |
16471 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16472 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16473 | prop_type); | |
a405673c JB |
16474 | if (!stride_ok) |
16475 | { | |
b98664d3 | 16476 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16477 | " - DIE at %s [in module %s]"), |
16478 | sect_offset_str (die->sect_off), | |
5e22e966 | 16479 | objfile_name (cu->per_objfile->objfile)); |
a405673c JB |
16480 | /* Ignore this attribute. We will likely not be able to print |
16481 | arrays of this type correctly, but there is little we can do | |
16482 | to help if we cannot read the attribute's value. */ | |
16483 | byte_stride_prop = NULL; | |
16484 | } | |
16485 | } | |
dc53a7ad JB |
16486 | |
16487 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16488 | if (attr != NULL) | |
529908cb | 16489 | bit_stride = attr->constant_value (0); |
dc53a7ad | 16490 | |
c906108c SS |
16491 | /* Irix 6.2 native cc creates array types without children for |
16492 | arrays with unspecified length. */ | |
639d11d3 | 16493 | if (die->child == NULL) |
c906108c | 16494 | { |
46bf5051 | 16495 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16496 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16497 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16498 | byte_stride_prop, bit_stride); |
f792889a | 16499 | return set_die_type (die, type, cu); |
c906108c SS |
16500 | } |
16501 | ||
791afaa2 | 16502 | std::vector<struct type *> range_types; |
639d11d3 | 16503 | child_die = die->child; |
c906108c SS |
16504 | while (child_die && child_die->tag) |
16505 | { | |
16506 | if (child_die->tag == DW_TAG_subrange_type) | |
16507 | { | |
f792889a | 16508 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16509 | |
dda83cd7 SM |
16510 | if (child_type != NULL) |
16511 | { | |
0963b4bd | 16512 | /* The range type was succesfully read. Save it for the |
dda83cd7 | 16513 | array type creation. */ |
791afaa2 | 16514 | range_types.push_back (child_type); |
dda83cd7 | 16515 | } |
c906108c | 16516 | } |
436c571c | 16517 | child_die = child_die->sibling; |
c906108c SS |
16518 | } |
16519 | ||
cf2b2075 TV |
16520 | if (range_types.empty ()) |
16521 | { | |
16522 | complaint (_("unable to find array range - DIE at %s [in module %s]"), | |
16523 | sect_offset_str (die->sect_off), | |
16524 | objfile_name (cu->per_objfile->objfile)); | |
16525 | return NULL; | |
16526 | } | |
16527 | ||
c906108c SS |
16528 | /* Dwarf2 dimensions are output from left to right, create the |
16529 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16530 | |
c906108c | 16531 | type = element_type; |
7ca2d3a3 DL |
16532 | |
16533 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16534 | { | |
16535 | int i = 0; | |
9a619af0 | 16536 | |
791afaa2 | 16537 | while (i < range_types.size ()) |
10f6a3ad TT |
16538 | { |
16539 | type = create_array_type_with_stride (NULL, type, range_types[i++], | |
16540 | byte_stride_prop, bit_stride); | |
16541 | bit_stride = 0; | |
16542 | byte_stride_prop = nullptr; | |
16543 | } | |
7ca2d3a3 DL |
16544 | } |
16545 | else | |
16546 | { | |
791afaa2 | 16547 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16548 | while (ndim-- > 0) |
10f6a3ad TT |
16549 | { |
16550 | type = create_array_type_with_stride (NULL, type, range_types[ndim], | |
16551 | byte_stride_prop, bit_stride); | |
16552 | bit_stride = 0; | |
16553 | byte_stride_prop = nullptr; | |
16554 | } | |
7ca2d3a3 | 16555 | } |
c906108c | 16556 | |
cf2b2075 TV |
16557 | gdb_assert (type != element_type); |
16558 | ||
f5f8a009 EZ |
16559 | /* Understand Dwarf2 support for vector types (like they occur on |
16560 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16561 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16562 | custom vendor extension. The main difference between a regular | |
16563 | array and the vector variant is that vectors are passed by value | |
16564 | to functions. */ | |
e142c38c | 16565 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 16566 | if (attr != nullptr) |
ea37ba09 | 16567 | make_vector_type (type); |
f5f8a009 | 16568 | |
dbc98a8b KW |
16569 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16570 | implementation may choose to implement triple vectors using this | |
16571 | attribute. */ | |
16572 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
529908cb | 16573 | if (attr != nullptr && attr->form_is_unsigned ()) |
dbc98a8b | 16574 | { |
529908cb TT |
16575 | if (attr->as_unsigned () >= TYPE_LENGTH (type)) |
16576 | TYPE_LENGTH (type) = attr->as_unsigned (); | |
dbc98a8b | 16577 | else |
b98664d3 | 16578 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16579 | "than the total size of elements")); |
dbc98a8b KW |
16580 | } |
16581 | ||
39cbfefa DJ |
16582 | name = dwarf2_name (die, cu); |
16583 | if (name) | |
d0e39ea2 | 16584 | type->set_name (name); |
6e70227d | 16585 | |
2b4424c3 TT |
16586 | maybe_set_alignment (cu, die, type); |
16587 | ||
57567375 TT |
16588 | struct type *replacement_type = nullptr; |
16589 | if (cu->language == language_ada) | |
16590 | { | |
16591 | replacement_type = quirk_ada_thick_pointer (die, cu, type); | |
16592 | if (replacement_type != nullptr) | |
16593 | type = replacement_type; | |
16594 | } | |
16595 | ||
0963b4bd | 16596 | /* Install the type in the die. */ |
57567375 | 16597 | set_die_type (die, type, cu, replacement_type != nullptr); |
7e314c57 JK |
16598 | |
16599 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16600 | set_descriptive_type (type, die, cu); |
16601 | ||
7e314c57 | 16602 | return type; |
c906108c SS |
16603 | } |
16604 | ||
7ca2d3a3 | 16605 | static enum dwarf_array_dim_ordering |
6e70227d | 16606 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16607 | { |
16608 | struct attribute *attr; | |
16609 | ||
16610 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16611 | ||
435d3d88 | 16612 | if (attr != nullptr) |
1bc397c5 TT |
16613 | { |
16614 | LONGEST val = attr->constant_value (-1); | |
16615 | if (val == DW_ORD_row_major || val == DW_ORD_col_major) | |
16616 | return (enum dwarf_array_dim_ordering) val; | |
16617 | } | |
7ca2d3a3 | 16618 | |
0963b4bd MS |
16619 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16620 | opposite order to the dwarf2 specification, but data is still | |
16621 | laid out as per normal fortran. | |
7ca2d3a3 | 16622 | |
0963b4bd MS |
16623 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16624 | version checking. */ | |
7ca2d3a3 | 16625 | |
905e0470 PM |
16626 | if (cu->language == language_fortran |
16627 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16628 | { |
16629 | return DW_ORD_row_major; | |
16630 | } | |
16631 | ||
3a3440fb | 16632 | switch (cu->language_defn->array_ordering ()) |
7ca2d3a3 DL |
16633 | { |
16634 | case array_column_major: | |
16635 | return DW_ORD_col_major; | |
16636 | case array_row_major: | |
16637 | default: | |
16638 | return DW_ORD_row_major; | |
16639 | }; | |
16640 | } | |
16641 | ||
72019c9c | 16642 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16643 | the DIE's type field. */ |
72019c9c | 16644 | |
f792889a | 16645 | static struct type * |
72019c9c GM |
16646 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16647 | { | |
7e314c57 JK |
16648 | struct type *domain_type, *set_type; |
16649 | struct attribute *attr; | |
f792889a | 16650 | |
7e314c57 JK |
16651 | domain_type = die_type (die, cu); |
16652 | ||
16653 | /* The die_type call above may have already set the type for this DIE. */ | |
16654 | set_type = get_die_type (die, cu); | |
16655 | if (set_type) | |
16656 | return set_type; | |
16657 | ||
16658 | set_type = create_set_type (NULL, domain_type); | |
16659 | ||
16660 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
529908cb TT |
16661 | if (attr != nullptr && attr->form_is_unsigned ()) |
16662 | TYPE_LENGTH (set_type) = attr->as_unsigned (); | |
7e314c57 | 16663 | |
2b4424c3 TT |
16664 | maybe_set_alignment (cu, die, set_type); |
16665 | ||
f792889a | 16666 | return set_die_type (die, set_type, cu); |
72019c9c | 16667 | } |
7ca2d3a3 | 16668 | |
0971de02 TT |
16669 | /* A helper for read_common_block that creates a locexpr baton. |
16670 | SYM is the symbol which we are marking as computed. | |
16671 | COMMON_DIE is the DIE for the common block. | |
16672 | COMMON_LOC is the location expression attribute for the common | |
16673 | block itself. | |
16674 | MEMBER_LOC is the location expression attribute for the particular | |
16675 | member of the common block that we are processing. | |
16676 | CU is the CU from which the above come. */ | |
16677 | ||
16678 | static void | |
16679 | mark_common_block_symbol_computed (struct symbol *sym, | |
16680 | struct die_info *common_die, | |
16681 | struct attribute *common_loc, | |
16682 | struct attribute *member_loc, | |
16683 | struct dwarf2_cu *cu) | |
16684 | { | |
5e22e966 | 16685 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 16686 | struct objfile *objfile = per_objfile->objfile; |
0971de02 TT |
16687 | struct dwarf2_locexpr_baton *baton; |
16688 | gdb_byte *ptr; | |
16689 | unsigned int cu_off; | |
08feed99 | 16690 | enum bfd_endian byte_order = gdbarch_byte_order (objfile->arch ()); |
0971de02 TT |
16691 | LONGEST offset = 0; |
16692 | ||
16693 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
16694 | gdb_assert (common_loc->form_is_block ()); |
16695 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 16696 | || member_loc->form_is_constant ()); |
0971de02 | 16697 | |
8d749320 | 16698 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
a50264ba | 16699 | baton->per_objfile = per_objfile; |
0971de02 TT |
16700 | baton->per_cu = cu->per_cu; |
16701 | gdb_assert (baton->per_cu); | |
16702 | ||
16703 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16704 | ||
cd6c91b4 | 16705 | if (member_loc->form_is_constant ()) |
0971de02 | 16706 | { |
0826b30a | 16707 | offset = member_loc->constant_value (0); |
0971de02 TT |
16708 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; |
16709 | } | |
16710 | else | |
9d2246fc | 16711 | baton->size += member_loc->as_block ()->size; |
0971de02 | 16712 | |
224c3ddb | 16713 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16714 | baton->data = ptr; |
16715 | ||
16716 | *ptr++ = DW_OP_call4; | |
9c541725 | 16717 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16718 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16719 | ptr += 4; | |
16720 | ||
cd6c91b4 | 16721 | if (member_loc->form_is_constant ()) |
0971de02 TT |
16722 | { |
16723 | *ptr++ = DW_OP_addr; | |
16724 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16725 | ptr += cu->header.addr_size; | |
16726 | } | |
16727 | else | |
16728 | { | |
16729 | /* We have to copy the data here, because DW_OP_call4 will only | |
16730 | use a DW_AT_location attribute. */ | |
9d2246fc TT |
16731 | struct dwarf_block *block = member_loc->as_block (); |
16732 | memcpy (ptr, block->data, block->size); | |
16733 | ptr += block->size; | |
0971de02 TT |
16734 | } |
16735 | ||
16736 | *ptr++ = DW_OP_plus; | |
16737 | gdb_assert (ptr - baton->data == baton->size); | |
16738 | ||
0971de02 | 16739 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16740 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16741 | } |
16742 | ||
4357ac6c TT |
16743 | /* Create appropriate locally-scoped variables for all the |
16744 | DW_TAG_common_block entries. Also create a struct common_block | |
16745 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16746 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16747 | variable names. */ |
c906108c SS |
16748 | |
16749 | static void | |
e7c27a73 | 16750 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16751 | { |
0971de02 TT |
16752 | struct attribute *attr; |
16753 | ||
16754 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16755 | if (attr != nullptr) |
0971de02 TT |
16756 | { |
16757 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16758 | if (attr->form_is_block ()) |
dda83cd7 | 16759 | { |
0971de02 | 16760 | /* Ok. */ |
dda83cd7 | 16761 | } |
cd6c91b4 | 16762 | else if (attr->form_is_section_offset ()) |
dda83cd7 | 16763 | { |
0971de02 TT |
16764 | dwarf2_complex_location_expr_complaint (); |
16765 | attr = NULL; | |
dda83cd7 | 16766 | } |
0971de02 | 16767 | else |
dda83cd7 | 16768 | { |
0971de02 TT |
16769 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16770 | "common block member"); | |
16771 | attr = NULL; | |
dda83cd7 | 16772 | } |
0971de02 TT |
16773 | } |
16774 | ||
639d11d3 | 16775 | if (die->child != NULL) |
c906108c | 16776 | { |
5e22e966 | 16777 | struct objfile *objfile = cu->per_objfile->objfile; |
4357ac6c TT |
16778 | struct die_info *child_die; |
16779 | size_t n_entries = 0, size; | |
16780 | struct common_block *common_block; | |
16781 | struct symbol *sym; | |
74ac6d43 | 16782 | |
4357ac6c TT |
16783 | for (child_die = die->child; |
16784 | child_die && child_die->tag; | |
436c571c | 16785 | child_die = child_die->sibling) |
4357ac6c TT |
16786 | ++n_entries; |
16787 | ||
16788 | size = (sizeof (struct common_block) | |
16789 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16790 | common_block |
16791 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16792 | size); | |
4357ac6c TT |
16793 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16794 | common_block->n_entries = 0; | |
16795 | ||
16796 | for (child_die = die->child; | |
16797 | child_die && child_die->tag; | |
436c571c | 16798 | child_die = child_die->sibling) |
4357ac6c TT |
16799 | { |
16800 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16801 | symbol scope. */ | |
e7c27a73 | 16802 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16803 | if (sym != NULL) |
16804 | { | |
16805 | struct attribute *member_loc; | |
16806 | ||
16807 | common_block->contents[common_block->n_entries++] = sym; | |
16808 | ||
16809 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16810 | cu); | |
16811 | if (member_loc) | |
16812 | { | |
16813 | /* GDB has handled this for a long time, but it is | |
16814 | not specified by DWARF. It seems to have been | |
16815 | emitted by gfortran at least as recently as: | |
16816 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16817 | complaint (_("Variable in common block has " |
0971de02 | 16818 | "DW_AT_data_member_location " |
9d8780f0 SM |
16819 | "- DIE at %s [in module %s]"), |
16820 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16821 | objfile_name (objfile)); |
0971de02 | 16822 | |
cd6c91b4 | 16823 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16824 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16825 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16826 | || member_loc->form_is_block ()) |
0971de02 | 16827 | { |
435d3d88 | 16828 | if (attr != nullptr) |
0971de02 TT |
16829 | mark_common_block_symbol_computed (sym, die, attr, |
16830 | member_loc, cu); | |
16831 | } | |
16832 | else | |
16833 | dwarf2_complex_location_expr_complaint (); | |
16834 | } | |
16835 | } | |
c906108c | 16836 | } |
4357ac6c TT |
16837 | |
16838 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16839 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16840 | } |
16841 | } | |
16842 | ||
0114d602 | 16843 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16844 | |
0114d602 DJ |
16845 | static struct type * |
16846 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16847 | { |
5e22e966 | 16848 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 16849 | const char *previous_prefix, *name; |
9219021c | 16850 | int is_anonymous; |
0114d602 DJ |
16851 | struct type *type; |
16852 | ||
16853 | /* For extensions, reuse the type of the original namespace. */ | |
16854 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16855 | { | |
16856 | struct die_info *ext_die; | |
16857 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16858 | |
0114d602 DJ |
16859 | ext_die = dwarf2_extension (die, &ext_cu); |
16860 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16861 | |
16862 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16863 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16864 | return set_die_type (die, type, cu); |
16865 | } | |
9219021c | 16866 | |
e142c38c | 16867 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16868 | |
16869 | /* Now build the name of the current namespace. */ | |
16870 | ||
0114d602 DJ |
16871 | previous_prefix = determine_prefix (die, cu); |
16872 | if (previous_prefix[0] != '\0') | |
16873 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16874 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16875 | |
16876 | /* Create the type. */ | |
19f392bc | 16877 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16878 | |
60531b24 | 16879 | return set_die_type (die, type, cu); |
0114d602 DJ |
16880 | } |
16881 | ||
22cee43f | 16882 | /* Read a namespace scope. */ |
0114d602 DJ |
16883 | |
16884 | static void | |
16885 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16886 | { | |
5e22e966 | 16887 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 16888 | int is_anonymous; |
9219021c | 16889 | |
5c4e30ca DC |
16890 | /* Add a symbol associated to this if we haven't seen the namespace |
16891 | before. Also, add a using directive if it's an anonymous | |
16892 | namespace. */ | |
9219021c | 16893 | |
f2f0e013 | 16894 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16895 | { |
16896 | struct type *type; | |
16897 | ||
0114d602 | 16898 | type = read_type_die (die, cu); |
e7c27a73 | 16899 | new_symbol (die, type, cu); |
5c4e30ca | 16900 | |
e8e80198 | 16901 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16902 | if (is_anonymous) |
0114d602 DJ |
16903 | { |
16904 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16905 | |
eb1e02fd | 16906 | std::vector<const char *> excludes; |
804d2729 | 16907 | add_using_directive (using_directives (cu), |
7d93a1e0 | 16908 | previous_prefix, type->name (), NULL, |
eb1e02fd | 16909 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16910 | } |
5c4e30ca | 16911 | } |
9219021c | 16912 | |
639d11d3 | 16913 | if (die->child != NULL) |
d9fa45fe | 16914 | { |
639d11d3 | 16915 | struct die_info *child_die = die->child; |
6e70227d | 16916 | |
d9fa45fe DC |
16917 | while (child_die && child_die->tag) |
16918 | { | |
e7c27a73 | 16919 | process_die (child_die, cu); |
436c571c | 16920 | child_die = child_die->sibling; |
d9fa45fe DC |
16921 | } |
16922 | } | |
38d518c9 EZ |
16923 | } |
16924 | ||
f55ee35c JK |
16925 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16926 | imported module. Still we need that type as local Fortran "use ... only" | |
16927 | declaration imports depend on the created type in determine_prefix. */ | |
16928 | ||
16929 | static struct type * | |
16930 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16931 | { | |
5e22e966 | 16932 | struct objfile *objfile = cu->per_objfile->objfile; |
15d034d0 | 16933 | const char *module_name; |
f55ee35c JK |
16934 | struct type *type; |
16935 | ||
16936 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16937 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16938 | |
f55ee35c JK |
16939 | return set_die_type (die, type, cu); |
16940 | } | |
16941 | ||
5d7cb8df JK |
16942 | /* Read a Fortran module. */ |
16943 | ||
16944 | static void | |
16945 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16946 | { | |
16947 | struct die_info *child_die = die->child; | |
530e8392 KB |
16948 | struct type *type; |
16949 | ||
16950 | type = read_type_die (die, cu); | |
16951 | new_symbol (die, type, cu); | |
5d7cb8df | 16952 | |
5d7cb8df JK |
16953 | while (child_die && child_die->tag) |
16954 | { | |
16955 | process_die (child_die, cu); | |
436c571c | 16956 | child_die = child_die->sibling; |
5d7cb8df JK |
16957 | } |
16958 | } | |
16959 | ||
38d518c9 EZ |
16960 | /* Return the name of the namespace represented by DIE. Set |
16961 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16962 | namespace. */ | |
16963 | ||
16964 | static const char * | |
e142c38c | 16965 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16966 | { |
16967 | struct die_info *current_die; | |
16968 | const char *name = NULL; | |
16969 | ||
16970 | /* Loop through the extensions until we find a name. */ | |
16971 | ||
16972 | for (current_die = die; | |
16973 | current_die != NULL; | |
f2f0e013 | 16974 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16975 | { |
96553a0c DE |
16976 | /* We don't use dwarf2_name here so that we can detect the absence |
16977 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16978 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16979 | |
38d518c9 EZ |
16980 | if (name != NULL) |
16981 | break; | |
16982 | } | |
16983 | ||
16984 | /* Is it an anonymous namespace? */ | |
16985 | ||
16986 | *is_anonymous = (name == NULL); | |
16987 | if (*is_anonymous) | |
2b1dbab0 | 16988 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16989 | |
16990 | return name; | |
d9fa45fe DC |
16991 | } |
16992 | ||
c906108c SS |
16993 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16994 | the user defined type vector. */ | |
16995 | ||
f792889a | 16996 | static struct type * |
e7c27a73 | 16997 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16998 | { |
5e22e966 | 16999 | struct gdbarch *gdbarch = cu->per_objfile->objfile->arch (); |
e7c27a73 | 17000 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 17001 | struct type *type; |
8b2dbe47 KB |
17002 | struct attribute *attr_byte_size; |
17003 | struct attribute *attr_address_class; | |
17004 | int byte_size, addr_class; | |
7e314c57 JK |
17005 | struct type *target_type; |
17006 | ||
17007 | target_type = die_type (die, cu); | |
c906108c | 17008 | |
7e314c57 JK |
17009 | /* The die_type call above may have already set the type for this DIE. */ |
17010 | type = get_die_type (die, cu); | |
17011 | if (type) | |
17012 | return type; | |
17013 | ||
17014 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 17015 | |
e142c38c | 17016 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 | 17017 | if (attr_byte_size) |
529908cb | 17018 | byte_size = attr_byte_size->constant_value (cu_header->addr_size); |
c906108c | 17019 | else |
8b2dbe47 KB |
17020 | byte_size = cu_header->addr_size; |
17021 | ||
e142c38c | 17022 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 | 17023 | if (attr_address_class) |
529908cb | 17024 | addr_class = attr_address_class->constant_value (DW_ADDR_none); |
8b2dbe47 KB |
17025 | else |
17026 | addr_class = DW_ADDR_none; | |
17027 | ||
2b4424c3 TT |
17028 | ULONGEST alignment = get_alignment (cu, die); |
17029 | ||
17030 | /* If the pointer size, alignment, or address class is different | |
17031 | than the default, create a type variant marked as such and set | |
17032 | the length accordingly. */ | |
17033 | if (TYPE_LENGTH (type) != byte_size | |
17034 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
17035 | && alignment != TYPE_RAW_ALIGN (type)) | |
17036 | || addr_class != DW_ADDR_none) | |
c906108c | 17037 | { |
5e2b427d | 17038 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 | 17039 | { |
314ad88d PA |
17040 | type_instance_flags type_flags |
17041 | = gdbarch_address_class_type_flags (gdbarch, byte_size, | |
17042 | addr_class); | |
876cecd0 TT |
17043 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
17044 | == 0); | |
8b2dbe47 KB |
17045 | type = make_type_with_address_space (type, type_flags); |
17046 | } | |
17047 | else if (TYPE_LENGTH (type) != byte_size) | |
17048 | { | |
b98664d3 | 17049 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 17050 | } |
2b4424c3 TT |
17051 | else if (TYPE_RAW_ALIGN (type) != alignment) |
17052 | { | |
b98664d3 | 17053 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
17054 | " - DIE at %s [in module %s]"), |
17055 | sect_offset_str (die->sect_off), | |
5e22e966 | 17056 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 | 17057 | } |
6e70227d | 17058 | else |
9a619af0 MS |
17059 | { |
17060 | /* Should we also complain about unhandled address classes? */ | |
17061 | } | |
c906108c | 17062 | } |
8b2dbe47 KB |
17063 | |
17064 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 17065 | set_type_align (type, alignment); |
f792889a | 17066 | return set_die_type (die, type, cu); |
c906108c SS |
17067 | } |
17068 | ||
17069 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
17070 | the user defined type vector. */ | |
17071 | ||
f792889a | 17072 | static struct type * |
e7c27a73 | 17073 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
17074 | { |
17075 | struct type *type; | |
17076 | struct type *to_type; | |
17077 | struct type *domain; | |
17078 | ||
e7c27a73 DJ |
17079 | to_type = die_type (die, cu); |
17080 | domain = die_containing_type (die, cu); | |
0d5de010 | 17081 | |
7e314c57 JK |
17082 | /* The calls above may have already set the type for this DIE. */ |
17083 | type = get_die_type (die, cu); | |
17084 | if (type) | |
17085 | return type; | |
17086 | ||
78134374 | 17087 | if (check_typedef (to_type)->code () == TYPE_CODE_METHOD) |
0d5de010 | 17088 | type = lookup_methodptr_type (to_type); |
78134374 | 17089 | else if (check_typedef (to_type)->code () == TYPE_CODE_FUNC) |
7078baeb | 17090 | { |
5e22e966 | 17091 | struct type *new_type = alloc_type (cu->per_objfile->objfile); |
7078baeb TT |
17092 | |
17093 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
80fc5e77 | 17094 | to_type->fields (), to_type->num_fields (), |
a409645d | 17095 | to_type->has_varargs ()); |
7078baeb TT |
17096 | type = lookup_methodptr_type (new_type); |
17097 | } | |
0d5de010 DJ |
17098 | else |
17099 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 17100 | |
f792889a | 17101 | return set_die_type (die, type, cu); |
c906108c SS |
17102 | } |
17103 | ||
4297a3f0 | 17104 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
17105 | the user defined type vector. */ |
17106 | ||
f792889a | 17107 | static struct type * |
4297a3f0 | 17108 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
dda83cd7 | 17109 | enum type_code refcode) |
c906108c | 17110 | { |
e7c27a73 | 17111 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 17112 | struct type *type, *target_type; |
c906108c SS |
17113 | struct attribute *attr; |
17114 | ||
4297a3f0 AV |
17115 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
17116 | ||
7e314c57 JK |
17117 | target_type = die_type (die, cu); |
17118 | ||
17119 | /* The die_type call above may have already set the type for this DIE. */ | |
17120 | type = get_die_type (die, cu); | |
17121 | if (type) | |
17122 | return type; | |
17123 | ||
4297a3f0 | 17124 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 17125 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17126 | if (attr != nullptr) |
c906108c | 17127 | { |
529908cb | 17128 | TYPE_LENGTH (type) = attr->constant_value (cu_header->addr_size); |
c906108c SS |
17129 | } |
17130 | else | |
17131 | { | |
107d2387 | 17132 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 17133 | } |
2b4424c3 | 17134 | maybe_set_alignment (cu, die, type); |
f792889a | 17135 | return set_die_type (die, type, cu); |
c906108c SS |
17136 | } |
17137 | ||
cf363f18 MW |
17138 | /* Add the given cv-qualifiers to the element type of the array. GCC |
17139 | outputs DWARF type qualifiers that apply to an array, not the | |
17140 | element type. But GDB relies on the array element type to carry | |
17141 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
17142 | specification. */ | |
17143 | ||
17144 | static struct type * | |
17145 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
17146 | struct type *base_type, int cnst, int voltl) | |
17147 | { | |
17148 | struct type *el_type, *inner_array; | |
17149 | ||
17150 | base_type = copy_type (base_type); | |
17151 | inner_array = base_type; | |
17152 | ||
78134374 | 17153 | while (TYPE_TARGET_TYPE (inner_array)->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
17154 | { |
17155 | TYPE_TARGET_TYPE (inner_array) = | |
17156 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
17157 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
17158 | } | |
17159 | ||
17160 | el_type = TYPE_TARGET_TYPE (inner_array); | |
17161 | cnst |= TYPE_CONST (el_type); | |
17162 | voltl |= TYPE_VOLATILE (el_type); | |
17163 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
17164 | ||
17165 | return set_die_type (die, base_type, cu); | |
17166 | } | |
17167 | ||
f792889a | 17168 | static struct type * |
e7c27a73 | 17169 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17170 | { |
f792889a | 17171 | struct type *base_type, *cv_type; |
c906108c | 17172 | |
e7c27a73 | 17173 | base_type = die_type (die, cu); |
7e314c57 JK |
17174 | |
17175 | /* The die_type call above may have already set the type for this DIE. */ | |
17176 | cv_type = get_die_type (die, cu); | |
17177 | if (cv_type) | |
17178 | return cv_type; | |
17179 | ||
2f608a3a KW |
17180 | /* In case the const qualifier is applied to an array type, the element type |
17181 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
78134374 | 17182 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 | 17183 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17184 | |
f792889a DJ |
17185 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17186 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17187 | } |
17188 | ||
f792889a | 17189 | static struct type * |
e7c27a73 | 17190 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17191 | { |
f792889a | 17192 | struct type *base_type, *cv_type; |
c906108c | 17193 | |
e7c27a73 | 17194 | base_type = die_type (die, cu); |
7e314c57 JK |
17195 | |
17196 | /* The die_type call above may have already set the type for this DIE. */ | |
17197 | cv_type = get_die_type (die, cu); | |
17198 | if (cv_type) | |
17199 | return cv_type; | |
17200 | ||
cf363f18 MW |
17201 | /* In case the volatile qualifier is applied to an array type, the |
17202 | element type is so qualified, not the array type (section 6.7.3 | |
17203 | of C99). */ | |
78134374 | 17204 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
17205 | return add_array_cv_type (die, cu, base_type, 0, 1); |
17206 | ||
f792889a DJ |
17207 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17208 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17209 | } |
17210 | ||
06d66ee9 TT |
17211 | /* Handle DW_TAG_restrict_type. */ |
17212 | ||
17213 | static struct type * | |
17214 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17215 | { | |
17216 | struct type *base_type, *cv_type; | |
17217 | ||
17218 | base_type = die_type (die, cu); | |
17219 | ||
17220 | /* The die_type call above may have already set the type for this DIE. */ | |
17221 | cv_type = get_die_type (die, cu); | |
17222 | if (cv_type) | |
17223 | return cv_type; | |
17224 | ||
17225 | cv_type = make_restrict_type (base_type); | |
17226 | return set_die_type (die, cv_type, cu); | |
17227 | } | |
17228 | ||
a2c2acaf MW |
17229 | /* Handle DW_TAG_atomic_type. */ |
17230 | ||
17231 | static struct type * | |
17232 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17233 | { | |
17234 | struct type *base_type, *cv_type; | |
17235 | ||
17236 | base_type = die_type (die, cu); | |
17237 | ||
17238 | /* The die_type call above may have already set the type for this DIE. */ | |
17239 | cv_type = get_die_type (die, cu); | |
17240 | if (cv_type) | |
17241 | return cv_type; | |
17242 | ||
17243 | cv_type = make_atomic_type (base_type); | |
17244 | return set_die_type (die, cv_type, cu); | |
17245 | } | |
17246 | ||
c906108c SS |
17247 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17248 | the user defined type vector. It isn't really a user defined type, | |
17249 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17250 | attribute to reference it. */ | |
17251 | ||
f792889a | 17252 | static struct type * |
e7c27a73 | 17253 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17254 | { |
5e22e966 | 17255 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 17256 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
17257 | struct type *type, *range_type, *index_type, *char_type; |
17258 | struct attribute *attr; | |
216a7e6b AB |
17259 | struct dynamic_prop prop; |
17260 | bool length_is_constant = true; | |
17261 | LONGEST length; | |
17262 | ||
17263 | /* There are a couple of places where bit sizes might be made use of | |
17264 | when parsing a DW_TAG_string_type, however, no producer that we know | |
17265 | of make use of these. Handling bit sizes that are a multiple of the | |
17266 | byte size is easy enough, but what about other bit sizes? Lets deal | |
17267 | with that problem when we have to. Warn about these attributes being | |
17268 | unsupported, then parse the type and ignore them like we always | |
17269 | have. */ | |
17270 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
17271 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
17272 | { | |
17273 | static bool warning_printed = false; | |
17274 | if (!warning_printed) | |
17275 | { | |
17276 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
17277 | "currently supported on DW_TAG_string_type.")); | |
17278 | warning_printed = true; | |
17279 | } | |
17280 | } | |
c906108c | 17281 | |
e142c38c | 17282 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 17283 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
17284 | { |
17285 | /* The string length describes the location at which the length of | |
17286 | the string can be found. The size of the length field can be | |
17287 | specified with one of the attributes below. */ | |
17288 | struct type *prop_type; | |
17289 | struct attribute *len | |
17290 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
17291 | if (len == nullptr) | |
17292 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 17293 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
17294 | { |
17295 | /* Pass 0 as the default as we know this attribute is constant | |
17296 | and the default value will not be returned. */ | |
0826b30a | 17297 | LONGEST sz = len->constant_value (0); |
293e7e51 | 17298 | prop_type = cu->per_objfile->int_type (sz, true); |
216a7e6b AB |
17299 | } |
17300 | else | |
17301 | { | |
17302 | /* If the size is not specified then we assume it is the size of | |
17303 | an address on this target. */ | |
293e7e51 | 17304 | prop_type = cu->addr_sized_int_type (true); |
216a7e6b AB |
17305 | } |
17306 | ||
17307 | /* Convert the attribute into a dynamic property. */ | |
17308 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
17309 | length = 1; | |
17310 | else | |
17311 | length_is_constant = false; | |
17312 | } | |
17313 | else if (attr != nullptr) | |
17314 | { | |
17315 | /* This DW_AT_string_length just contains the length with no | |
17316 | indirection. There's no need to create a dynamic property in this | |
17317 | case. Pass 0 for the default value as we know it will not be | |
17318 | returned in this case. */ | |
0826b30a | 17319 | length = attr->constant_value (0); |
216a7e6b AB |
17320 | } |
17321 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 17322 | { |
216a7e6b | 17323 | /* We don't currently support non-constant byte sizes for strings. */ |
0826b30a | 17324 | length = attr->constant_value (1); |
c906108c SS |
17325 | } |
17326 | else | |
17327 | { | |
216a7e6b AB |
17328 | /* Use 1 as a fallback length if we have nothing else. */ |
17329 | length = 1; | |
c906108c | 17330 | } |
6ccb9162 | 17331 | |
46bf5051 | 17332 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
17333 | if (length_is_constant) |
17334 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
17335 | else | |
17336 | { | |
17337 | struct dynamic_prop low_bound; | |
17338 | ||
8c2e4e06 | 17339 | low_bound.set_const_val (1); |
216a7e6b AB |
17340 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); |
17341 | } | |
3b7538c0 UW |
17342 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17343 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17344 | |
f792889a | 17345 | return set_die_type (die, type, cu); |
c906108c SS |
17346 | } |
17347 | ||
4d804846 JB |
17348 | /* Assuming that DIE corresponds to a function, returns nonzero |
17349 | if the function is prototyped. */ | |
17350 | ||
17351 | static int | |
17352 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17353 | { | |
17354 | struct attribute *attr; | |
17355 | ||
17356 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
c45bc3f8 | 17357 | if (attr && attr->as_boolean ()) |
4d804846 JB |
17358 | return 1; |
17359 | ||
17360 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 17361 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
17362 | languages that allow unprototyped functions (Eg: Objective C). |
17363 | For all other languages, assume that functions are always | |
17364 | prototyped. */ | |
17365 | if (cu->language != language_c | |
17366 | && cu->language != language_objc | |
17367 | && cu->language != language_opencl) | |
17368 | return 1; | |
17369 | ||
17370 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17371 | prototyped and unprototyped functions; default to prototyped, | |
17372 | since that is more common in modern code (and RealView warns | |
17373 | about unprototyped functions). */ | |
17374 | if (producer_is_realview (cu->producer)) | |
17375 | return 1; | |
17376 | ||
17377 | return 0; | |
17378 | } | |
17379 | ||
c906108c SS |
17380 | /* Handle DIES due to C code like: |
17381 | ||
17382 | struct foo | |
c5aa993b JM |
17383 | { |
17384 | int (*funcp)(int a, long l); | |
17385 | int b; | |
17386 | }; | |
c906108c | 17387 | |
0963b4bd | 17388 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17389 | |
f792889a | 17390 | static struct type * |
e7c27a73 | 17391 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17392 | { |
5e22e966 | 17393 | struct objfile *objfile = cu->per_objfile->objfile; |
0963b4bd MS |
17394 | struct type *type; /* Type that this function returns. */ |
17395 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17396 | struct attribute *attr; |
17397 | ||
e7c27a73 | 17398 | type = die_type (die, cu); |
7e314c57 JK |
17399 | |
17400 | /* The die_type call above may have already set the type for this DIE. */ | |
17401 | ftype = get_die_type (die, cu); | |
17402 | if (ftype) | |
17403 | return ftype; | |
17404 | ||
0c8b41f1 | 17405 | ftype = lookup_function_type (type); |
c906108c | 17406 | |
4d804846 | 17407 | if (prototyped_function_p (die, cu)) |
27e69b7a | 17408 | ftype->set_is_prototyped (true); |
c906108c | 17409 | |
c055b101 CV |
17410 | /* Store the calling convention in the type if it's available in |
17411 | the subroutine die. Otherwise set the calling convention to | |
17412 | the default value DW_CC_normal. */ | |
17413 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf | 17414 | if (attr != nullptr |
529908cb | 17415 | && is_valid_DW_AT_calling_convention_for_subroutine (attr->constant_value (0))) |
d0922fcf | 17416 | TYPE_CALLING_CONVENTION (ftype) |
529908cb | 17417 | = (enum dwarf_calling_convention) attr->constant_value (0); |
54fcddd0 UW |
17418 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
17419 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17420 | else | |
17421 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17422 | |
743649fd MW |
17423 | /* Record whether the function returns normally to its caller or not |
17424 | if the DWARF producer set that information. */ | |
17425 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
c45bc3f8 | 17426 | if (attr && attr->as_boolean ()) |
743649fd MW |
17427 | TYPE_NO_RETURN (ftype) = 1; |
17428 | ||
76c10ea2 GM |
17429 | /* We need to add the subroutine type to the die immediately so |
17430 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17431 | declared as the same subroutine type. */ |
76c10ea2 | 17432 | set_die_type (die, ftype, cu); |
6e70227d | 17433 | |
639d11d3 | 17434 | if (die->child != NULL) |
c906108c | 17435 | { |
bb5ed363 | 17436 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17437 | struct die_info *child_die; |
8072405b | 17438 | int nparams, iparams; |
c906108c SS |
17439 | |
17440 | /* Count the number of parameters. | |
dda83cd7 SM |
17441 | FIXME: GDB currently ignores vararg functions, but knows about |
17442 | vararg member functions. */ | |
8072405b | 17443 | nparams = 0; |
639d11d3 | 17444 | child_die = die->child; |
c906108c SS |
17445 | while (child_die && child_die->tag) |
17446 | { | |
17447 | if (child_die->tag == DW_TAG_formal_parameter) | |
17448 | nparams++; | |
17449 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
1d6286ed SM |
17450 | ftype->set_has_varargs (true); |
17451 | ||
436c571c | 17452 | child_die = child_die->sibling; |
c906108c SS |
17453 | } |
17454 | ||
17455 | /* Allocate storage for parameters and fill them in. */ | |
5e33d5f4 | 17456 | ftype->set_num_fields (nparams); |
3cabb6b0 SM |
17457 | ftype->set_fields |
17458 | ((struct field *) TYPE_ZALLOC (ftype, nparams * sizeof (struct field))); | |
c906108c | 17459 | |
8072405b JK |
17460 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17461 | even if we error out during the parameters reading below. */ | |
17462 | for (iparams = 0; iparams < nparams; iparams++) | |
5d14b6e5 | 17463 | ftype->field (iparams).set_type (void_type); |
8072405b JK |
17464 | |
17465 | iparams = 0; | |
639d11d3 | 17466 | child_die = die->child; |
c906108c SS |
17467 | while (child_die && child_die->tag) |
17468 | { | |
17469 | if (child_die->tag == DW_TAG_formal_parameter) | |
17470 | { | |
3ce3b1ba PA |
17471 | struct type *arg_type; |
17472 | ||
17473 | /* DWARF version 2 has no clean way to discern C++ | |
17474 | static and non-static member functions. G++ helps | |
17475 | GDB by marking the first parameter for non-static | |
17476 | member functions (which is the this pointer) as | |
17477 | artificial. We pass this information to | |
17478 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17479 | ||
17480 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17481 | 4.5 does not yet generate. */ | |
e142c38c | 17482 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 17483 | if (attr != nullptr) |
c45bc3f8 | 17484 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = attr->as_boolean (); |
c906108c | 17485 | else |
9c37b5ae | 17486 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17487 | arg_type = die_type (child_die, cu); |
17488 | ||
17489 | /* RealView does not mark THIS as const, which the testsuite | |
17490 | expects. GCC marks THIS as const in method definitions, | |
17491 | but not in the class specifications (GCC PR 43053). */ | |
17492 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17493 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17494 | { | |
17495 | int is_this = 0; | |
17496 | struct dwarf2_cu *arg_cu = cu; | |
17497 | const char *name = dwarf2_name (child_die, cu); | |
17498 | ||
17499 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 17500 | if (attr != nullptr) |
3ce3b1ba PA |
17501 | { |
17502 | /* If the compiler emits this, use it. */ | |
17503 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17504 | is_this = 1; | |
17505 | } | |
17506 | else if (name && strcmp (name, "this") == 0) | |
17507 | /* Function definitions will have the argument names. */ | |
17508 | is_this = 1; | |
17509 | else if (name == NULL && iparams == 0) | |
17510 | /* Declarations may not have the names, so like | |
17511 | elsewhere in GDB, assume an artificial first | |
17512 | argument is "this". */ | |
17513 | is_this = 1; | |
17514 | ||
17515 | if (is_this) | |
17516 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17517 | arg_type, 0); | |
17518 | } | |
17519 | ||
5d14b6e5 | 17520 | ftype->field (iparams).set_type (arg_type); |
c906108c SS |
17521 | iparams++; |
17522 | } | |
436c571c | 17523 | child_die = child_die->sibling; |
c906108c SS |
17524 | } |
17525 | } | |
17526 | ||
76c10ea2 | 17527 | return ftype; |
c906108c SS |
17528 | } |
17529 | ||
f792889a | 17530 | static struct type * |
e7c27a73 | 17531 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17532 | { |
5e22e966 | 17533 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 17534 | const char *name = NULL; |
3c8e0968 | 17535 | struct type *this_type, *target_type; |
c906108c | 17536 | |
94af9270 | 17537 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc | 17538 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
8f53807e | 17539 | this_type->set_target_is_stub (true); |
f792889a | 17540 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17541 | target_type = die_type (die, cu); |
17542 | if (target_type != this_type) | |
17543 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17544 | else | |
17545 | { | |
17546 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17547 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17548 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17549 | "- DIE at %s [in module %s]"), |
17550 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17551 | TYPE_TARGET_TYPE (this_type) = NULL; |
17552 | } | |
e4003a34 TV |
17553 | if (name == NULL) |
17554 | { | |
17555 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates | |
17556 | anonymous typedefs, which is, strictly speaking, invalid DWARF. | |
17557 | Handle these by just returning the target type, rather than | |
17558 | constructing an anonymous typedef type and trying to handle this | |
17559 | elsewhere. */ | |
17560 | set_die_type (die, target_type, cu); | |
17561 | return target_type; | |
17562 | } | |
f792889a | 17563 | return this_type; |
c906108c SS |
17564 | } |
17565 | ||
a625a8c9 TT |
17566 | /* Helper for get_dwarf2_rational_constant that computes the value of |
17567 | a given gmp_mpz given an attribute. */ | |
17568 | ||
17569 | static void | |
17570 | get_mpz (struct dwarf2_cu *cu, gdb_mpz *value, struct attribute *attr) | |
17571 | { | |
17572 | /* GCC will sometimes emit a 16-byte constant value as a DWARF | |
17573 | location expression that pushes an implicit value. */ | |
17574 | if (attr->form == DW_FORM_exprloc) | |
17575 | { | |
17576 | dwarf_block *blk = attr->as_block (); | |
17577 | if (blk->size > 0 && blk->data[0] == DW_OP_implicit_value) | |
17578 | { | |
17579 | uint64_t len; | |
17580 | const gdb_byte *ptr = safe_read_uleb128 (blk->data + 1, | |
17581 | blk->data + blk->size, | |
17582 | &len); | |
17583 | if (ptr - blk->data + len <= blk->size) | |
17584 | { | |
17585 | mpz_import (value->val, len, | |
17586 | bfd_big_endian (cu->per_objfile->objfile->obfd) ? 1 : -1, | |
17587 | 1, 0, 0, ptr); | |
17588 | return; | |
17589 | } | |
17590 | } | |
17591 | ||
17592 | /* On failure set it to 1. */ | |
17593 | *value = gdb_mpz (1); | |
17594 | } | |
17595 | else if (attr->form_is_block ()) | |
17596 | { | |
17597 | dwarf_block *blk = attr->as_block (); | |
17598 | mpz_import (value->val, blk->size, | |
17599 | bfd_big_endian (cu->per_objfile->objfile->obfd) ? 1 : -1, | |
17600 | 1, 0, 0, blk->data); | |
17601 | } | |
17602 | else | |
17603 | *value = gdb_mpz (attr->constant_value (1)); | |
17604 | } | |
17605 | ||
09584414 JB |
17606 | /* Assuming DIE is a rational DW_TAG_constant, read the DIE's |
17607 | numerator and denominator into NUMERATOR and DENOMINATOR (resp). | |
17608 | ||
17609 | If the numerator and/or numerator attribute is missing, | |
17610 | a complaint is filed, and NUMERATOR and DENOMINATOR are left | |
17611 | untouched. */ | |
17612 | ||
17613 | static void | |
17614 | get_dwarf2_rational_constant (struct die_info *die, struct dwarf2_cu *cu, | |
5cde1d82 | 17615 | gdb_mpz *numerator, gdb_mpz *denominator) |
09584414 JB |
17616 | { |
17617 | struct attribute *num_attr, *denom_attr; | |
17618 | ||
17619 | num_attr = dwarf2_attr (die, DW_AT_GNU_numerator, cu); | |
17620 | if (num_attr == nullptr) | |
17621 | complaint (_("DW_AT_GNU_numerator missing in %s DIE at %s"), | |
17622 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17623 | ||
17624 | denom_attr = dwarf2_attr (die, DW_AT_GNU_denominator, cu); | |
17625 | if (denom_attr == nullptr) | |
17626 | complaint (_("DW_AT_GNU_denominator missing in %s DIE at %s"), | |
17627 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17628 | ||
17629 | if (num_attr == nullptr || denom_attr == nullptr) | |
17630 | return; | |
17631 | ||
a625a8c9 TT |
17632 | get_mpz (cu, numerator, num_attr); |
17633 | get_mpz (cu, denominator, denom_attr); | |
09584414 JB |
17634 | } |
17635 | ||
17636 | /* Same as get_dwarf2_rational_constant, but extracting an unsigned | |
17637 | rational constant, rather than a signed one. | |
17638 | ||
17639 | If the rational constant has a negative value, a complaint | |
17640 | is filed, and NUMERATOR and DENOMINATOR are left untouched. */ | |
17641 | ||
17642 | static void | |
17643 | get_dwarf2_unsigned_rational_constant (struct die_info *die, | |
17644 | struct dwarf2_cu *cu, | |
5cde1d82 TT |
17645 | gdb_mpz *numerator, |
17646 | gdb_mpz *denominator) | |
09584414 | 17647 | { |
5cde1d82 TT |
17648 | gdb_mpz num (1); |
17649 | gdb_mpz denom (1); | |
09584414 JB |
17650 | |
17651 | get_dwarf2_rational_constant (die, cu, &num, &denom); | |
5cde1d82 | 17652 | if (mpz_sgn (num.val) == -1 && mpz_sgn (denom.val) == -1) |
09584414 | 17653 | { |
5cde1d82 TT |
17654 | mpz_neg (num.val, num.val); |
17655 | mpz_neg (denom.val, denom.val); | |
09584414 | 17656 | } |
5cde1d82 | 17657 | else if (mpz_sgn (num.val) == -1) |
09584414 JB |
17658 | { |
17659 | complaint (_("unexpected negative value for DW_AT_GNU_numerator" | |
17660 | " in DIE at %s"), | |
17661 | sect_offset_str (die->sect_off)); | |
17662 | return; | |
17663 | } | |
5cde1d82 | 17664 | else if (mpz_sgn (denom.val) == -1) |
09584414 JB |
17665 | { |
17666 | complaint (_("unexpected negative value for DW_AT_GNU_denominator" | |
17667 | " in DIE at %s"), | |
17668 | sect_offset_str (die->sect_off)); | |
17669 | return; | |
17670 | } | |
17671 | ||
5cde1d82 TT |
17672 | *numerator = std::move (num); |
17673 | *denominator = std::move (denom); | |
09584414 JB |
17674 | } |
17675 | ||
bbcdf9ab TT |
17676 | /* Assuming that ENCODING is a string whose contents starting at the |
17677 | K'th character is "_nn" where "nn" is a decimal number, scan that | |
17678 | number and set RESULT to the value. K is updated to point to the | |
17679 | character immediately following the number. | |
17680 | ||
17681 | If the string does not conform to the format described above, false | |
17682 | is returned, and K may or may not be changed. */ | |
17683 | ||
17684 | static bool | |
17685 | ada_get_gnat_encoded_number (const char *encoding, int &k, gdb_mpz *result) | |
17686 | { | |
17687 | /* The next character should be an underscore ('_') followed | |
17688 | by a digit. */ | |
17689 | if (encoding[k] != '_' || !isdigit (encoding[k + 1])) | |
17690 | return false; | |
17691 | ||
17692 | /* Skip the underscore. */ | |
17693 | k++; | |
17694 | int start = k; | |
17695 | ||
17696 | /* Determine the number of digits for our number. */ | |
17697 | while (isdigit (encoding[k])) | |
17698 | k++; | |
17699 | if (k == start) | |
17700 | return false; | |
17701 | ||
17702 | std::string copy (&encoding[start], k - start); | |
17703 | if (mpz_set_str (result->val, copy.c_str (), 10) == -1) | |
17704 | return false; | |
17705 | ||
17706 | return true; | |
17707 | } | |
17708 | ||
17709 | /* Scan two numbers from ENCODING at OFFSET, assuming the string is of | |
17710 | the form _NN_DD, where NN and DD are decimal numbers. Set NUM and | |
17711 | DENOM, update OFFSET, and return true on success. Return false on | |
17712 | failure. */ | |
17713 | ||
17714 | static bool | |
17715 | ada_get_gnat_encoded_ratio (const char *encoding, int &offset, | |
17716 | gdb_mpz *num, gdb_mpz *denom) | |
17717 | { | |
17718 | if (!ada_get_gnat_encoded_number (encoding, offset, num)) | |
17719 | return false; | |
17720 | return ada_get_gnat_encoded_number (encoding, offset, denom); | |
17721 | } | |
17722 | ||
09584414 | 17723 | /* Assuming DIE corresponds to a fixed point type, finish the creation |
bbcdf9ab TT |
17724 | of the corresponding TYPE by setting its type-specific data. CU is |
17725 | the DIE's CU. SUFFIX is the "XF" type name suffix coming from GNAT | |
17726 | encodings. It is nullptr if the GNAT encoding should be | |
17727 | ignored. */ | |
09584414 JB |
17728 | |
17729 | static void | |
bbcdf9ab TT |
17730 | finish_fixed_point_type (struct type *type, const char *suffix, |
17731 | struct die_info *die, struct dwarf2_cu *cu) | |
09584414 | 17732 | { |
09584414 JB |
17733 | gdb_assert (type->code () == TYPE_CODE_FIXED_POINT |
17734 | && TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_FIXED_POINT); | |
17735 | ||
bbcdf9ab TT |
17736 | /* If GNAT encodings are preferred, don't examine the |
17737 | attributes. */ | |
17738 | struct attribute *attr = nullptr; | |
17739 | if (suffix == nullptr) | |
17740 | { | |
17741 | attr = dwarf2_attr (die, DW_AT_binary_scale, cu); | |
17742 | if (attr == nullptr) | |
17743 | attr = dwarf2_attr (die, DW_AT_decimal_scale, cu); | |
17744 | if (attr == nullptr) | |
17745 | attr = dwarf2_attr (die, DW_AT_small, cu); | |
17746 | } | |
09584414 | 17747 | |
5cde1d82 TT |
17748 | /* Numerator and denominator of our fixed-point type's scaling factor. |
17749 | The default is a scaling factor of 1, which we use as a fallback | |
17750 | when we are not able to decode it (problem with the debugging info, | |
17751 | unsupported forms, bug in GDB, etc...). Using that as the default | |
17752 | allows us to at least print the unscaled value, which might still | |
17753 | be useful to a user. */ | |
17754 | gdb_mpz scale_num (1); | |
17755 | gdb_mpz scale_denom (1); | |
17756 | ||
09584414 JB |
17757 | if (attr == nullptr) |
17758 | { | |
bbcdf9ab TT |
17759 | int offset = 0; |
17760 | if (suffix != nullptr | |
17761 | && ada_get_gnat_encoded_ratio (suffix, offset, &scale_num, | |
17762 | &scale_denom) | |
17763 | /* The number might be encoded as _nn_dd_nn_dd, where the | |
17764 | second ratio is the 'small value. In this situation, we | |
17765 | want the second value. */ | |
17766 | && (suffix[offset] != '_' | |
17767 | || ada_get_gnat_encoded_ratio (suffix, offset, &scale_num, | |
17768 | &scale_denom))) | |
17769 | { | |
17770 | /* Found it. */ | |
17771 | } | |
17772 | else | |
17773 | { | |
17774 | /* Scaling factor not found. Assume a scaling factor of 1, | |
17775 | and hope for the best. At least the user will be able to | |
17776 | see the encoded value. */ | |
17777 | scale_num = 1; | |
17778 | scale_denom = 1; | |
17779 | complaint (_("no scale found for fixed-point type (DIE at %s)"), | |
17780 | sect_offset_str (die->sect_off)); | |
17781 | } | |
09584414 JB |
17782 | } |
17783 | else if (attr->name == DW_AT_binary_scale) | |
17784 | { | |
17785 | LONGEST scale_exp = attr->constant_value (0); | |
5cde1d82 | 17786 | gdb_mpz *num_or_denom = scale_exp > 0 ? &scale_num : &scale_denom; |
09584414 | 17787 | |
5cde1d82 | 17788 | mpz_mul_2exp (num_or_denom->val, num_or_denom->val, std::abs (scale_exp)); |
09584414 JB |
17789 | } |
17790 | else if (attr->name == DW_AT_decimal_scale) | |
17791 | { | |
17792 | LONGEST scale_exp = attr->constant_value (0); | |
5cde1d82 | 17793 | gdb_mpz *num_or_denom = scale_exp > 0 ? &scale_num : &scale_denom; |
09584414 | 17794 | |
5cde1d82 | 17795 | mpz_ui_pow_ui (num_or_denom->val, 10, std::abs (scale_exp)); |
09584414 JB |
17796 | } |
17797 | else if (attr->name == DW_AT_small) | |
17798 | { | |
17799 | struct die_info *scale_die; | |
17800 | struct dwarf2_cu *scale_cu = cu; | |
17801 | ||
17802 | scale_die = follow_die_ref (die, attr, &scale_cu); | |
17803 | if (scale_die->tag == DW_TAG_constant) | |
17804 | get_dwarf2_unsigned_rational_constant (scale_die, scale_cu, | |
17805 | &scale_num, &scale_denom); | |
17806 | else | |
17807 | complaint (_("%s DIE not supported as target of DW_AT_small attribute" | |
17808 | " (DIE at %s)"), | |
17809 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17810 | } | |
17811 | else | |
17812 | { | |
17813 | complaint (_("unsupported scale attribute %s for fixed-point type" | |
17814 | " (DIE at %s)"), | |
17815 | dwarf_attr_name (attr->name), | |
17816 | sect_offset_str (die->sect_off)); | |
17817 | } | |
17818 | ||
2a12c336 | 17819 | gdb_mpq &scaling_factor = type->fixed_point_info ().scaling_factor; |
5cde1d82 TT |
17820 | mpz_set (mpq_numref (scaling_factor.val), scale_num.val); |
17821 | mpz_set (mpq_denref (scaling_factor.val), scale_denom.val); | |
09584414 JB |
17822 | mpq_canonicalize (scaling_factor.val); |
17823 | } | |
17824 | ||
bbcdf9ab TT |
17825 | /* The gnat-encoding suffix for fixed point. */ |
17826 | ||
17827 | #define GNAT_FIXED_POINT_SUFFIX "___XF_" | |
17828 | ||
17829 | /* If NAME encodes an Ada fixed-point type, return a pointer to the | |
17830 | "XF" suffix of the name. The text after this is what encodes the | |
17831 | 'small and 'delta information. Otherwise, return nullptr. */ | |
17832 | ||
17833 | static const char * | |
17834 | gnat_encoded_fixed_point_type_info (const char *name) | |
17835 | { | |
17836 | return strstr (name, GNAT_FIXED_POINT_SUFFIX); | |
17837 | } | |
17838 | ||
9b790ce7 UW |
17839 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17840 | (which may be different from NAME) to the architecture back-end to allow | |
17841 | it to guess the correct format if necessary. */ | |
17842 | ||
17843 | static struct type * | |
17844 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 17845 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 | 17846 | { |
08feed99 | 17847 | struct gdbarch *gdbarch = objfile->arch (); |
9b790ce7 UW |
17848 | const struct floatformat **format; |
17849 | struct type *type; | |
17850 | ||
17851 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17852 | if (format) | |
103a685e | 17853 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 17854 | else |
77b7c781 | 17855 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17856 | |
17857 | return type; | |
17858 | } | |
17859 | ||
eb77c9df AB |
17860 | /* Allocate an integer type of size BITS and name NAME. */ |
17861 | ||
17862 | static struct type * | |
17863 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17864 | int bits, int unsigned_p, const char *name) | |
17865 | { | |
17866 | struct type *type; | |
17867 | ||
17868 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17869 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17870 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17871 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17872 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17873 | type = objfile_type (objfile)->builtin_void; |
17874 | else | |
17875 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17876 | ||
17877 | return type; | |
17878 | } | |
17879 | ||
09584414 JB |
17880 | /* Return true if DIE has a DW_AT_small attribute whose value is |
17881 | a constant rational, where both the numerator and denominator | |
17882 | are equal to zero. | |
17883 | ||
17884 | CU is the DIE's Compilation Unit. */ | |
17885 | ||
17886 | static bool | |
17887 | has_zero_over_zero_small_attribute (struct die_info *die, | |
17888 | struct dwarf2_cu *cu) | |
17889 | { | |
17890 | struct attribute *attr = dwarf2_attr (die, DW_AT_small, cu); | |
17891 | if (attr == nullptr) | |
17892 | return false; | |
17893 | ||
17894 | struct dwarf2_cu *scale_cu = cu; | |
17895 | struct die_info *scale_die | |
17896 | = follow_die_ref (die, attr, &scale_cu); | |
17897 | ||
17898 | if (scale_die->tag != DW_TAG_constant) | |
17899 | return false; | |
17900 | ||
5cde1d82 | 17901 | gdb_mpz num (1), denom (1); |
09584414 | 17902 | get_dwarf2_rational_constant (scale_die, cu, &num, &denom); |
5cde1d82 | 17903 | return mpz_sgn (num.val) == 0 && mpz_sgn (denom.val) == 0; |
09584414 JB |
17904 | } |
17905 | ||
8bdc1658 AB |
17906 | /* Initialise and return a floating point type of size BITS suitable for |
17907 | use as a component of a complex number. The NAME_HINT is passed through | |
17908 | when initialising the floating point type and is the name of the complex | |
17909 | type. | |
17910 | ||
17911 | As DWARF doesn't currently provide an explicit name for the components | |
17912 | of a complex number, but it can be helpful to have these components | |
17913 | named, we try to select a suitable name based on the size of the | |
17914 | component. */ | |
17915 | static struct type * | |
17916 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17917 | struct objfile *objfile, | |
103a685e TT |
17918 | int bits, const char *name_hint, |
17919 | enum bfd_endian byte_order) | |
8bdc1658 | 17920 | { |
08feed99 | 17921 | gdbarch *gdbarch = objfile->arch (); |
8bdc1658 AB |
17922 | struct type *tt = nullptr; |
17923 | ||
35add35e AB |
17924 | /* Try to find a suitable floating point builtin type of size BITS. |
17925 | We're going to use the name of this type as the name for the complex | |
17926 | target type that we are about to create. */ | |
1db455a7 | 17927 | switch (cu->language) |
8bdc1658 | 17928 | { |
1db455a7 AB |
17929 | case language_fortran: |
17930 | switch (bits) | |
17931 | { | |
17932 | case 32: | |
17933 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17934 | break; | |
17935 | case 64: | |
17936 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17937 | break; | |
17938 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17939 | case 128: | |
17940 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17941 | break; | |
17942 | } | |
8bdc1658 | 17943 | break; |
1db455a7 AB |
17944 | default: |
17945 | switch (bits) | |
17946 | { | |
17947 | case 32: | |
17948 | tt = builtin_type (gdbarch)->builtin_float; | |
17949 | break; | |
17950 | case 64: | |
17951 | tt = builtin_type (gdbarch)->builtin_double; | |
17952 | break; | |
17953 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17954 | case 128: | |
17955 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17956 | break; | |
17957 | } | |
8bdc1658 AB |
17958 | break; |
17959 | } | |
17960 | ||
35add35e AB |
17961 | /* If the type we found doesn't match the size we were looking for, then |
17962 | pretend we didn't find a type at all, the complex target type we | |
17963 | create will then be nameless. */ | |
a12e5744 | 17964 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17965 | tt = nullptr; |
17966 | ||
7d93a1e0 | 17967 | const char *name = (tt == nullptr) ? nullptr : tt->name (); |
103a685e | 17968 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
17969 | } |
17970 | ||
c906108c SS |
17971 | /* Find a representation of a given base type and install |
17972 | it in the TYPE field of the die. */ | |
17973 | ||
f792889a | 17974 | static struct type * |
e7c27a73 | 17975 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17976 | { |
5e22e966 | 17977 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c SS |
17978 | struct type *type; |
17979 | struct attribute *attr; | |
19f392bc | 17980 | int encoding = 0, bits = 0; |
15d034d0 | 17981 | const char *name; |
34877895 | 17982 | gdbarch *arch; |
c906108c | 17983 | |
e142c38c | 17984 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
529908cb TT |
17985 | if (attr != nullptr && attr->form_is_constant ()) |
17986 | encoding = attr->constant_value (0); | |
e142c38c | 17987 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17988 | if (attr != nullptr) |
529908cb | 17989 | bits = attr->constant_value (0) * TARGET_CHAR_BIT; |
39cbfefa | 17990 | name = dwarf2_name (die, cu); |
6ccb9162 | 17991 | if (!name) |
34877895 | 17992 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e | 17993 | |
08feed99 | 17994 | arch = objfile->arch (); |
103a685e TT |
17995 | enum bfd_endian byte_order = gdbarch_byte_order (arch); |
17996 | ||
34877895 | 17997 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
529908cb | 17998 | if (attr != nullptr && attr->form_is_constant ()) |
103a685e | 17999 | { |
529908cb | 18000 | int endianity = attr->constant_value (0); |
103a685e TT |
18001 | |
18002 | switch (endianity) | |
18003 | { | |
18004 | case DW_END_big: | |
18005 | byte_order = BFD_ENDIAN_BIG; | |
18006 | break; | |
18007 | case DW_END_little: | |
18008 | byte_order = BFD_ENDIAN_LITTLE; | |
18009 | break; | |
18010 | default: | |
18011 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
18012 | break; | |
18013 | } | |
18014 | } | |
6ccb9162 | 18015 | |
09584414 JB |
18016 | if ((encoding == DW_ATE_signed_fixed || encoding == DW_ATE_unsigned_fixed) |
18017 | && cu->language == language_ada | |
18018 | && has_zero_over_zero_small_attribute (die, cu)) | |
18019 | { | |
18020 | /* brobecker/2018-02-24: This is a fixed point type for which | |
18021 | the scaling factor is represented as fraction whose value | |
18022 | does not make sense (zero divided by zero), so we should | |
18023 | normally never see these. However, there is a small category | |
18024 | of fixed point types for which GNAT is unable to provide | |
18025 | the scaling factor via the standard DWARF mechanisms, and | |
18026 | for which the info is provided via the GNAT encodings instead. | |
bbcdf9ab | 18027 | This is likely what this DIE is about. */ |
09584414 JB |
18028 | encoding = (encoding == DW_ATE_signed_fixed |
18029 | ? DW_ATE_signed | |
18030 | : DW_ATE_unsigned); | |
18031 | } | |
18032 | ||
bbcdf9ab TT |
18033 | /* With GNAT encodings, fixed-point information will be encoded in |
18034 | the type name. Note that this can also occur with the above | |
18035 | zero-over-zero case, which is why this is a separate "if" rather | |
18036 | than an "else if". */ | |
18037 | const char *gnat_encoding_suffix = nullptr; | |
18038 | if ((encoding == DW_ATE_signed || encoding == DW_ATE_unsigned) | |
18039 | && cu->language == language_ada | |
18040 | && name != nullptr) | |
18041 | { | |
18042 | gnat_encoding_suffix = gnat_encoded_fixed_point_type_info (name); | |
18043 | if (gnat_encoding_suffix != nullptr) | |
18044 | { | |
18045 | gdb_assert (startswith (gnat_encoding_suffix, | |
18046 | GNAT_FIXED_POINT_SUFFIX)); | |
18047 | name = obstack_strndup (&cu->per_objfile->objfile->objfile_obstack, | |
18048 | name, gnat_encoding_suffix - name); | |
18049 | /* Use -1 here so that SUFFIX points at the "_" after the | |
18050 | "XF". */ | |
18051 | gnat_encoding_suffix += strlen (GNAT_FIXED_POINT_SUFFIX) - 1; | |
18052 | ||
18053 | encoding = (encoding == DW_ATE_signed | |
18054 | ? DW_ATE_signed_fixed | |
18055 | : DW_ATE_unsigned_fixed); | |
18056 | } | |
18057 | } | |
18058 | ||
6ccb9162 | 18059 | switch (encoding) |
c906108c | 18060 | { |
6ccb9162 UW |
18061 | case DW_ATE_address: |
18062 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 18063 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 18064 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
18065 | break; |
18066 | case DW_ATE_boolean: | |
19f392bc | 18067 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
18068 | break; |
18069 | case DW_ATE_complex_float: | |
103a685e TT |
18070 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
18071 | byte_order); | |
78134374 | 18072 | if (type->code () == TYPE_CODE_ERROR) |
93689ce9 TT |
18073 | { |
18074 | if (name == nullptr) | |
18075 | { | |
18076 | struct obstack *obstack | |
5e22e966 | 18077 | = &cu->per_objfile->objfile->objfile_obstack; |
7d93a1e0 | 18078 | name = obconcat (obstack, "_Complex ", type->name (), |
93689ce9 TT |
18079 | nullptr); |
18080 | } | |
18081 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); | |
18082 | } | |
18083 | else | |
18084 | type = init_complex_type (name, type); | |
6ccb9162 UW |
18085 | break; |
18086 | case DW_ATE_decimal_float: | |
19f392bc | 18087 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
18088 | break; |
18089 | case DW_ATE_float: | |
103a685e | 18090 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
18091 | break; |
18092 | case DW_ATE_signed: | |
eb77c9df | 18093 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
18094 | break; |
18095 | case DW_ATE_unsigned: | |
3b2b8fea TT |
18096 | if (cu->language == language_fortran |
18097 | && name | |
61012eef | 18098 | && startswith (name, "character(")) |
19f392bc UW |
18099 | type = init_character_type (objfile, bits, 1, name); |
18100 | else | |
eb77c9df | 18101 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
18102 | break; |
18103 | case DW_ATE_signed_char: | |
6e70227d | 18104 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
18105 | || cu->language == language_pascal |
18106 | || cu->language == language_fortran) | |
19f392bc UW |
18107 | type = init_character_type (objfile, bits, 0, name); |
18108 | else | |
eb77c9df | 18109 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
18110 | break; |
18111 | case DW_ATE_unsigned_char: | |
868a0084 | 18112 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 18113 | || cu->language == language_pascal |
c44af4eb TT |
18114 | || cu->language == language_fortran |
18115 | || cu->language == language_rust) | |
19f392bc UW |
18116 | type = init_character_type (objfile, bits, 1, name); |
18117 | else | |
eb77c9df | 18118 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 18119 | break; |
75079b2b | 18120 | case DW_ATE_UTF: |
53e710ac | 18121 | { |
53e710ac PA |
18122 | if (bits == 16) |
18123 | type = builtin_type (arch)->builtin_char16; | |
18124 | else if (bits == 32) | |
18125 | type = builtin_type (arch)->builtin_char32; | |
18126 | else | |
18127 | { | |
b98664d3 | 18128 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 18129 | bits); |
eb77c9df | 18130 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
18131 | } |
18132 | return set_die_type (die, type, cu); | |
18133 | } | |
75079b2b | 18134 | break; |
09584414 JB |
18135 | case DW_ATE_signed_fixed: |
18136 | type = init_fixed_point_type (objfile, bits, 0, name); | |
bbcdf9ab | 18137 | finish_fixed_point_type (type, gnat_encoding_suffix, die, cu); |
09584414 JB |
18138 | break; |
18139 | case DW_ATE_unsigned_fixed: | |
18140 | type = init_fixed_point_type (objfile, bits, 1, name); | |
bbcdf9ab | 18141 | finish_fixed_point_type (type, gnat_encoding_suffix, die, cu); |
09584414 | 18142 | break; |
75079b2b | 18143 | |
6ccb9162 | 18144 | default: |
b98664d3 | 18145 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 18146 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 18147 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 18148 | break; |
c906108c | 18149 | } |
6ccb9162 | 18150 | |
0114d602 | 18151 | if (name && strcmp (name, "char") == 0) |
15152a54 | 18152 | type->set_has_no_signedness (true); |
0114d602 | 18153 | |
2b4424c3 TT |
18154 | maybe_set_alignment (cu, die, type); |
18155 | ||
db558e34 | 18156 | type->set_endianity_is_not_default (gdbarch_byte_order (arch) != byte_order); |
34877895 | 18157 | |
20a5fcbd TT |
18158 | if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_INT) |
18159 | { | |
18160 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); | |
529908cb | 18161 | if (attr != nullptr && attr->as_unsigned () <= 8 * TYPE_LENGTH (type)) |
20a5fcbd | 18162 | { |
529908cb | 18163 | unsigned real_bit_size = attr->as_unsigned (); |
20a5fcbd TT |
18164 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
18165 | /* Only use the attributes if they make sense together. */ | |
18166 | if (attr == nullptr | |
529908cb TT |
18167 | || (attr->as_unsigned () + real_bit_size |
18168 | <= 8 * TYPE_LENGTH (type))) | |
20a5fcbd TT |
18169 | { |
18170 | TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_size | |
18171 | = real_bit_size; | |
18172 | if (attr != nullptr) | |
18173 | TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_offset | |
529908cb | 18174 | = attr->as_unsigned (); |
20a5fcbd TT |
18175 | } |
18176 | } | |
18177 | } | |
18178 | ||
f792889a | 18179 | return set_die_type (die, type, cu); |
c906108c SS |
18180 | } |
18181 | ||
80180f79 SA |
18182 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
18183 | resulting value of the attribute into struct bound_prop. | |
18184 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
18185 | ||
18186 | static int | |
18187 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
18188 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
18189 | struct type *default_type) | |
80180f79 SA |
18190 | { |
18191 | struct dwarf2_property_baton *baton; | |
5e22e966 | 18192 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba TT |
18193 | struct objfile *objfile = per_objfile->objfile; |
18194 | struct obstack *obstack = &objfile->objfile_obstack; | |
80180f79 | 18195 | |
9a49df9d AB |
18196 | gdb_assert (default_type != NULL); |
18197 | ||
80180f79 SA |
18198 | if (attr == NULL || prop == NULL) |
18199 | return 0; | |
18200 | ||
4fc6c0d5 | 18201 | if (attr->form_is_block ()) |
80180f79 | 18202 | { |
8d749320 | 18203 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18204 | baton->property_type = default_type; |
80180f79 | 18205 | baton->locexpr.per_cu = cu->per_cu; |
a50264ba | 18206 | baton->locexpr.per_objfile = per_objfile; |
9d2246fc TT |
18207 | |
18208 | struct dwarf_block *block = attr->as_block (); | |
18209 | baton->locexpr.size = block->size; | |
18210 | baton->locexpr.data = block->data; | |
216a7e6b AB |
18211 | switch (attr->name) |
18212 | { | |
18213 | case DW_AT_string_length: | |
18214 | baton->locexpr.is_reference = true; | |
18215 | break; | |
18216 | default: | |
18217 | baton->locexpr.is_reference = false; | |
18218 | break; | |
18219 | } | |
8c2e4e06 SM |
18220 | |
18221 | prop->set_locexpr (baton); | |
18222 | gdb_assert (prop->baton () != NULL); | |
80180f79 | 18223 | } |
cd6c91b4 | 18224 | else if (attr->form_is_ref ()) |
80180f79 SA |
18225 | { |
18226 | struct dwarf2_cu *target_cu = cu; | |
18227 | struct die_info *target_die; | |
18228 | struct attribute *target_attr; | |
18229 | ||
18230 | target_die = follow_die_ref (die, attr, &target_cu); | |
18231 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
18232 | if (target_attr == NULL) |
18233 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
18234 | target_cu); | |
80180f79 SA |
18235 | if (target_attr == NULL) |
18236 | return 0; | |
18237 | ||
df25ebbd | 18238 | switch (target_attr->name) |
80180f79 | 18239 | { |
df25ebbd | 18240 | case DW_AT_location: |
cd6c91b4 | 18241 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 18242 | { |
8d749320 | 18243 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18244 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd | 18245 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
8c2e4e06 SM |
18246 | prop->set_loclist (baton); |
18247 | gdb_assert (prop->baton () != NULL); | |
df25ebbd | 18248 | } |
4fc6c0d5 | 18249 | else if (target_attr->form_is_block ()) |
df25ebbd | 18250 | { |
8d749320 | 18251 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18252 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd | 18253 | baton->locexpr.per_cu = cu->per_cu; |
a50264ba | 18254 | baton->locexpr.per_objfile = per_objfile; |
9d2246fc TT |
18255 | struct dwarf_block *block = target_attr->as_block (); |
18256 | baton->locexpr.size = block->size; | |
18257 | baton->locexpr.data = block->data; | |
9a49df9d | 18258 | baton->locexpr.is_reference = true; |
8c2e4e06 SM |
18259 | prop->set_locexpr (baton); |
18260 | gdb_assert (prop->baton () != NULL); | |
df25ebbd JB |
18261 | } |
18262 | else | |
18263 | { | |
18264 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
18265 | "dynamic property"); | |
18266 | return 0; | |
18267 | } | |
18268 | break; | |
18269 | case DW_AT_data_member_location: | |
18270 | { | |
18271 | LONGEST offset; | |
18272 | ||
18273 | if (!handle_data_member_location (target_die, target_cu, | |
18274 | &offset)) | |
18275 | return 0; | |
18276 | ||
8d749320 | 18277 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18278 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 18279 | target_cu); |
df25ebbd JB |
18280 | baton->offset_info.offset = offset; |
18281 | baton->offset_info.type = die_type (target_die, target_cu); | |
8c2e4e06 | 18282 | prop->set_addr_offset (baton); |
df25ebbd JB |
18283 | break; |
18284 | } | |
80180f79 SA |
18285 | } |
18286 | } | |
cd6c91b4 | 18287 | else if (attr->form_is_constant ()) |
8c2e4e06 | 18288 | prop->set_const_val (attr->constant_value (0)); |
80180f79 SA |
18289 | else |
18290 | { | |
18291 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
18292 | dwarf2_name (die, cu)); | |
18293 | return 0; | |
18294 | } | |
18295 | ||
18296 | return 1; | |
18297 | } | |
18298 | ||
09ba997f | 18299 | /* See read.h. */ |
9a49df9d | 18300 | |
09ba997f | 18301 | struct type * |
293e7e51 | 18302 | dwarf2_per_objfile::int_type (int size_in_bytes, bool unsigned_p) const |
9a49df9d | 18303 | { |
9a49df9d AB |
18304 | struct type *int_type; |
18305 | ||
18306 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
18307 | #define TRY_TYPE(F) \ |
18308 | int_type = (unsigned_p \ | |
18309 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
18310 | : objfile_type (objfile)->builtin_ ## F); \ | |
18311 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
18312 | return int_type |
18313 | ||
18314 | TRY_TYPE (char); | |
18315 | TRY_TYPE (short); | |
18316 | TRY_TYPE (int); | |
18317 | TRY_TYPE (long); | |
18318 | TRY_TYPE (long_long); | |
18319 | ||
18320 | #undef TRY_TYPE | |
18321 | ||
18322 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
18323 | } | |
18324 | ||
b86352cf AB |
18325 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
18326 | present (which is valid) then compute the default type based on the | |
18327 | compilation units address size. */ | |
18328 | ||
18329 | static struct type * | |
18330 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
18331 | { | |
18332 | struct type *index_type = die_type (die, cu); | |
18333 | ||
18334 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
18335 | without specifying a base type. | |
18336 | In that case, the base type must be set to the type of | |
18337 | the lower bound, upper bound or count, in that order, if any of these | |
18338 | three attributes references an object that has a type. | |
18339 | If no base type is found, the Dwarf-2 specifications say that | |
18340 | a signed integer type of size equal to the size of an address should | |
18341 | be used. | |
18342 | For the following C code: `extern char gdb_int [];' | |
18343 | GCC produces an empty range DIE. | |
18344 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
18345 | high bound or count are not yet handled by this code. */ | |
78134374 | 18346 | if (index_type->code () == TYPE_CODE_VOID) |
293e7e51 | 18347 | index_type = cu->addr_sized_int_type (false); |
b86352cf AB |
18348 | |
18349 | return index_type; | |
18350 | } | |
18351 | ||
a02abb62 JB |
18352 | /* Read the given DW_AT_subrange DIE. */ |
18353 | ||
f792889a | 18354 | static struct type * |
a02abb62 JB |
18355 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
18356 | { | |
4c9ad8c2 | 18357 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
18358 | struct type *range_type; |
18359 | struct attribute *attr; | |
729efb13 | 18360 | struct dynamic_prop low, high; |
4fae6e18 | 18361 | int low_default_is_valid; |
c451ebe5 | 18362 | int high_bound_is_count = 0; |
15d034d0 | 18363 | const char *name; |
d359392f | 18364 | ULONGEST negative_mask; |
e77813c8 | 18365 | |
b86352cf AB |
18366 | orig_base_type = read_subrange_index_type (die, cu); |
18367 | ||
4c9ad8c2 TT |
18368 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
18369 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
18370 | creating the range type, but we use the result of check_typedef | |
18371 | when examining properties of the type. */ | |
18372 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 18373 | |
7e314c57 JK |
18374 | /* The die_type call above may have already set the type for this DIE. */ |
18375 | range_type = get_die_type (die, cu); | |
18376 | if (range_type) | |
18377 | return range_type; | |
18378 | ||
8c2e4e06 | 18379 | high.set_const_val (0); |
729efb13 | 18380 | |
4fae6e18 JK |
18381 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
18382 | omitting DW_AT_lower_bound. */ | |
18383 | switch (cu->language) | |
6e70227d | 18384 | { |
4fae6e18 JK |
18385 | case language_c: |
18386 | case language_cplus: | |
8c2e4e06 | 18387 | low.set_const_val (0); |
4fae6e18 JK |
18388 | low_default_is_valid = 1; |
18389 | break; | |
18390 | case language_fortran: | |
8c2e4e06 | 18391 | low.set_const_val (1); |
4fae6e18 JK |
18392 | low_default_is_valid = 1; |
18393 | break; | |
18394 | case language_d: | |
4fae6e18 | 18395 | case language_objc: |
c44af4eb | 18396 | case language_rust: |
8c2e4e06 | 18397 | low.set_const_val (0); |
4fae6e18 JK |
18398 | low_default_is_valid = (cu->header.version >= 4); |
18399 | break; | |
18400 | case language_ada: | |
18401 | case language_m2: | |
18402 | case language_pascal: | |
8c2e4e06 | 18403 | low.set_const_val (1); |
4fae6e18 JK |
18404 | low_default_is_valid = (cu->header.version >= 4); |
18405 | break; | |
18406 | default: | |
8c2e4e06 | 18407 | low.set_const_val (0); |
4fae6e18 JK |
18408 | low_default_is_valid = 0; |
18409 | break; | |
a02abb62 JB |
18410 | } |
18411 | ||
e142c38c | 18412 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 18413 | if (attr != nullptr) |
9a49df9d | 18414 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 18415 | else if (!low_default_is_valid) |
b98664d3 | 18416 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
18417 | "- DIE at %s [in module %s]"), |
18418 | sect_offset_str (die->sect_off), | |
5e22e966 | 18419 | objfile_name (cu->per_objfile->objfile)); |
a02abb62 | 18420 | |
506f5c41 TV |
18421 | struct attribute *attr_ub, *attr_count; |
18422 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 18423 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 18424 | { |
506f5c41 | 18425 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 18426 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 18427 | { |
c451ebe5 | 18428 | /* If bounds are constant do the final calculation here. */ |
8c2e4e06 SM |
18429 | if (low.kind () == PROP_CONST && high.kind () == PROP_CONST) |
18430 | high.set_const_val (low.const_val () + high.const_val () - 1); | |
c451ebe5 SA |
18431 | else |
18432 | high_bound_is_count = 1; | |
c2ff108b | 18433 | } |
506f5c41 TV |
18434 | else |
18435 | { | |
18436 | if (attr_ub != NULL) | |
18437 | complaint (_("Unresolved DW_AT_upper_bound " | |
18438 | "- DIE at %s [in module %s]"), | |
18439 | sect_offset_str (die->sect_off), | |
5e22e966 | 18440 | objfile_name (cu->per_objfile->objfile)); |
506f5c41 TV |
18441 | if (attr_count != NULL) |
18442 | complaint (_("Unresolved DW_AT_count " | |
18443 | "- DIE at %s [in module %s]"), | |
18444 | sect_offset_str (die->sect_off), | |
5e22e966 | 18445 | objfile_name (cu->per_objfile->objfile)); |
506f5c41 | 18446 | } |
e77813c8 | 18447 | } |
a02abb62 | 18448 | |
4e962e74 TT |
18449 | LONGEST bias = 0; |
18450 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 18451 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
0826b30a | 18452 | bias = bias_attr->constant_value (0); |
4e962e74 | 18453 | |
dbb9c2b1 JB |
18454 | /* Normally, the DWARF producers are expected to use a signed |
18455 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
18456 | But this is unfortunately not always the case, as witnessed | |
18457 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
18458 | is used instead. To work around that ambiguity, we treat | |
18459 | the bounds as signed, and thus sign-extend their values, when | |
18460 | the base type is signed. */ | |
6e70227d | 18461 | negative_mask = |
d359392f | 18462 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
8c2e4e06 | 18463 | if (low.kind () == PROP_CONST |
c6d940a9 | 18464 | && !base_type->is_unsigned () && (low.const_val () & negative_mask)) |
8c2e4e06 SM |
18465 | low.set_const_val (low.const_val () | negative_mask); |
18466 | if (high.kind () == PROP_CONST | |
c6d940a9 | 18467 | && !base_type->is_unsigned () && (high.const_val () & negative_mask)) |
8c2e4e06 | 18468 | high.set_const_val (high.const_val () | negative_mask); |
43bbcdc2 | 18469 | |
5bbd8269 AB |
18470 | /* Check for bit and byte strides. */ |
18471 | struct dynamic_prop byte_stride_prop; | |
18472 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
18473 | if (attr_byte_stride != nullptr) | |
18474 | { | |
293e7e51 | 18475 | struct type *prop_type = cu->addr_sized_int_type (false); |
5bbd8269 AB |
18476 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
18477 | prop_type); | |
18478 | } | |
18479 | ||
18480 | struct dynamic_prop bit_stride_prop; | |
18481 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
18482 | if (attr_bit_stride != nullptr) | |
18483 | { | |
18484 | /* It only makes sense to have either a bit or byte stride. */ | |
18485 | if (attr_byte_stride != nullptr) | |
18486 | { | |
18487 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
18488 | "- DIE at %s [in module %s]"), | |
18489 | sect_offset_str (die->sect_off), | |
5e22e966 | 18490 | objfile_name (cu->per_objfile->objfile)); |
5bbd8269 AB |
18491 | attr_bit_stride = nullptr; |
18492 | } | |
18493 | else | |
18494 | { | |
293e7e51 | 18495 | struct type *prop_type = cu->addr_sized_int_type (false); |
5bbd8269 AB |
18496 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
18497 | prop_type); | |
18498 | } | |
18499 | } | |
18500 | ||
18501 | if (attr_byte_stride != nullptr | |
18502 | || attr_bit_stride != nullptr) | |
18503 | { | |
18504 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
18505 | struct dynamic_prop *stride | |
18506 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
18507 | ||
18508 | range_type | |
18509 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
18510 | &high, bias, stride, byte_stride_p); | |
18511 | } | |
18512 | else | |
18513 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 18514 | |
c451ebe5 | 18515 | if (high_bound_is_count) |
599088e3 | 18516 | range_type->bounds ()->flag_upper_bound_is_count = 1; |
c451ebe5 | 18517 | |
c2ff108b JK |
18518 | /* Ada expects an empty array on no boundary attributes. */ |
18519 | if (attr == NULL && cu->language != language_ada) | |
8c2e4e06 | 18520 | range_type->bounds ()->high.set_undefined (); |
c2ff108b | 18521 | |
39cbfefa DJ |
18522 | name = dwarf2_name (die, cu); |
18523 | if (name) | |
d0e39ea2 | 18524 | range_type->set_name (name); |
6e70227d | 18525 | |
e142c38c | 18526 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 18527 | if (attr != nullptr) |
529908cb | 18528 | TYPE_LENGTH (range_type) = attr->constant_value (0); |
a02abb62 | 18529 | |
2b4424c3 TT |
18530 | maybe_set_alignment (cu, die, range_type); |
18531 | ||
7e314c57 JK |
18532 | set_die_type (die, range_type, cu); |
18533 | ||
18534 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
18535 | set_descriptive_type (range_type, die, cu); |
18536 | ||
7e314c57 | 18537 | return range_type; |
a02abb62 | 18538 | } |
6e70227d | 18539 | |
f792889a | 18540 | static struct type * |
81a17f79 JB |
18541 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
18542 | { | |
18543 | struct type *type; | |
81a17f79 | 18544 | |
5e22e966 | 18545 | type = init_type (cu->per_objfile->objfile, TYPE_CODE_VOID, 0, NULL); |
d0e39ea2 | 18546 | type->set_name (dwarf2_name (die, cu)); |
81a17f79 | 18547 | |
74a2f8ff | 18548 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 18549 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
18550 | such a type, we treat it as a stub, and try to resolve it later on, |
18551 | when needed. */ | |
18552 | if (cu->language == language_ada) | |
b4b73759 | 18553 | type->set_is_stub (true); |
74a2f8ff | 18554 | |
f792889a | 18555 | return set_die_type (die, type, cu); |
81a17f79 | 18556 | } |
a02abb62 | 18557 | |
639d11d3 DC |
18558 | /* Read a single die and all its descendents. Set the die's sibling |
18559 | field to NULL; set other fields in the die correctly, and set all | |
18560 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
18561 | location of the info_ptr after reading all of those dies. PARENT | |
18562 | is the parent of the die in question. */ | |
18563 | ||
18564 | static struct die_info * | |
dee91e82 | 18565 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
18566 | const gdb_byte *info_ptr, |
18567 | const gdb_byte **new_info_ptr, | |
dee91e82 | 18568 | struct die_info *parent) |
639d11d3 DC |
18569 | { |
18570 | struct die_info *die; | |
d521ce57 | 18571 | const gdb_byte *cur_ptr; |
639d11d3 | 18572 | |
3e225074 | 18573 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
18574 | if (die == NULL) |
18575 | { | |
18576 | *new_info_ptr = cur_ptr; | |
18577 | return NULL; | |
18578 | } | |
93311388 | 18579 | store_in_ref_table (die, reader->cu); |
639d11d3 | 18580 | |
3e225074 | 18581 | if (die->has_children) |
bf6af496 | 18582 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
18583 | else |
18584 | { | |
18585 | die->child = NULL; | |
18586 | *new_info_ptr = cur_ptr; | |
18587 | } | |
18588 | ||
18589 | die->sibling = NULL; | |
18590 | die->parent = parent; | |
18591 | return die; | |
18592 | } | |
18593 | ||
18594 | /* Read a die, all of its descendents, and all of its siblings; set | |
18595 | all of the fields of all of the dies correctly. Arguments are as | |
18596 | in read_die_and_children. */ | |
18597 | ||
18598 | static struct die_info * | |
bf6af496 | 18599 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
18600 | const gdb_byte *info_ptr, |
18601 | const gdb_byte **new_info_ptr, | |
bf6af496 | 18602 | struct die_info *parent) |
639d11d3 DC |
18603 | { |
18604 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 18605 | const gdb_byte *cur_ptr; |
639d11d3 | 18606 | |
c906108c | 18607 | cur_ptr = info_ptr; |
639d11d3 DC |
18608 | first_die = last_sibling = NULL; |
18609 | ||
18610 | while (1) | |
c906108c | 18611 | { |
639d11d3 | 18612 | struct die_info *die |
dee91e82 | 18613 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 18614 | |
1d325ec1 | 18615 | if (die == NULL) |
c906108c | 18616 | { |
639d11d3 DC |
18617 | *new_info_ptr = cur_ptr; |
18618 | return first_die; | |
c906108c | 18619 | } |
1d325ec1 DJ |
18620 | |
18621 | if (!first_die) | |
18622 | first_die = die; | |
c906108c | 18623 | else |
1d325ec1 DJ |
18624 | last_sibling->sibling = die; |
18625 | ||
18626 | last_sibling = die; | |
c906108c | 18627 | } |
c906108c SS |
18628 | } |
18629 | ||
bf6af496 DE |
18630 | /* Read a die, all of its descendents, and all of its siblings; set |
18631 | all of the fields of all of the dies correctly. Arguments are as | |
18632 | in read_die_and_children. | |
18633 | This the main entry point for reading a DIE and all its children. */ | |
18634 | ||
18635 | static struct die_info * | |
18636 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
18637 | const gdb_byte *info_ptr, |
18638 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
18639 | struct die_info *parent) |
18640 | { | |
18641 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
18642 | new_info_ptr, parent); | |
18643 | ||
b4f54984 | 18644 | if (dwarf_die_debug) |
bf6af496 DE |
18645 | { |
18646 | fprintf_unfiltered (gdb_stdlog, | |
18647 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 18648 | reader->die_section->get_name (), |
bf6af496 DE |
18649 | (unsigned) (info_ptr - reader->die_section->buffer), |
18650 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18651 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
18652 | } |
18653 | ||
18654 | return die; | |
18655 | } | |
18656 | ||
3019eac3 DE |
18657 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
18658 | attributes. | |
18659 | The caller is responsible for filling in the extra attributes | |
18660 | and updating (*DIEP)->num_attrs. | |
18661 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 18662 | except for its child, sibling, and parent fields. */ |
93311388 | 18663 | |
d521ce57 | 18664 | static const gdb_byte * |
3019eac3 | 18665 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 18666 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 18667 | int num_extra_attrs) |
93311388 | 18668 | { |
b64f50a1 | 18669 | unsigned int abbrev_number, bytes_read, i; |
7c32eebb | 18670 | const struct abbrev_info *abbrev; |
93311388 DE |
18671 | struct die_info *die; |
18672 | struct dwarf2_cu *cu = reader->cu; | |
18673 | bfd *abfd = reader->abfd; | |
18674 | ||
9c541725 | 18675 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
18676 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18677 | info_ptr += bytes_read; | |
18678 | if (!abbrev_number) | |
18679 | { | |
18680 | *diep = NULL; | |
93311388 DE |
18681 | return info_ptr; |
18682 | } | |
18683 | ||
685af9cd | 18684 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 18685 | if (!abbrev) |
348e048f DE |
18686 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
18687 | abbrev_number, | |
18688 | bfd_get_filename (abfd)); | |
18689 | ||
3019eac3 | 18690 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 18691 | die->sect_off = sect_off; |
93311388 DE |
18692 | die->tag = abbrev->tag; |
18693 | die->abbrev = abbrev_number; | |
3e225074 | 18694 | die->has_children = abbrev->has_children; |
93311388 | 18695 | |
3019eac3 DE |
18696 | /* Make the result usable. |
18697 | The caller needs to update num_attrs after adding the extra | |
18698 | attributes. */ | |
93311388 DE |
18699 | die->num_attrs = abbrev->num_attrs; |
18700 | ||
7a5f294d | 18701 | bool any_need_reprocess = false; |
93311388 | 18702 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e | 18703 | { |
7a5f294d TT |
18704 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
18705 | info_ptr); | |
18706 | if (die->attrs[i].requires_reprocessing_p ()) | |
18707 | any_need_reprocess = true; | |
18a8505e AT |
18708 | } |
18709 | ||
052c8bb8 | 18710 | struct attribute *attr = die->attr (DW_AT_str_offsets_base); |
529908cb TT |
18711 | if (attr != nullptr && attr->form_is_unsigned ()) |
18712 | cu->str_offsets_base = attr->as_unsigned (); | |
93311388 | 18713 | |
41144253 | 18714 | attr = die->attr (DW_AT_loclists_base); |
18715 | if (attr != nullptr) | |
529908cb | 18716 | cu->loclist_base = attr->as_unsigned (); |
41144253 | 18717 | |
a39fdb41 | 18718 | auto maybe_addr_base = die->addr_base (); |
18a8505e AT |
18719 | if (maybe_addr_base.has_value ()) |
18720 | cu->addr_base = *maybe_addr_base; | |
d0ce17d8 CT |
18721 | |
18722 | attr = die->attr (DW_AT_rnglists_base); | |
18723 | if (attr != nullptr) | |
2b0c7f41 | 18724 | cu->rnglists_base = attr->as_unsigned (); |
d0ce17d8 | 18725 | |
7a5f294d TT |
18726 | if (any_need_reprocess) |
18727 | { | |
18728 | for (i = 0; i < abbrev->num_attrs; ++i) | |
18729 | { | |
18730 | if (die->attrs[i].requires_reprocessing_p ()) | |
18731 | read_attribute_reprocess (reader, &die->attrs[i], die->tag); | |
18732 | } | |
18733 | } | |
93311388 | 18734 | *diep = die; |
93311388 DE |
18735 | return info_ptr; |
18736 | } | |
18737 | ||
3019eac3 DE |
18738 | /* Read a die and all its attributes. |
18739 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 18740 | except for its child, sibling, and parent fields. */ |
3019eac3 | 18741 | |
d521ce57 | 18742 | static const gdb_byte * |
3019eac3 | 18743 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 18744 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 18745 | { |
d521ce57 | 18746 | const gdb_byte *result; |
bf6af496 | 18747 | |
3e225074 | 18748 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 18749 | |
b4f54984 | 18750 | if (dwarf_die_debug) |
bf6af496 DE |
18751 | { |
18752 | fprintf_unfiltered (gdb_stdlog, | |
18753 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 18754 | reader->die_section->get_name (), |
bf6af496 DE |
18755 | (unsigned) (info_ptr - reader->die_section->buffer), |
18756 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18757 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
18758 | } |
18759 | ||
18760 | return result; | |
3019eac3 | 18761 | } |
433df2d4 | 18762 | \f |
c906108c | 18763 | |
72bf9492 DJ |
18764 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18765 | symbol for. */ | |
18766 | ||
18767 | static int | |
d8f62e84 | 18768 | is_type_tag_for_partial (int tag, enum language lang) |
72bf9492 DJ |
18769 | { |
18770 | switch (tag) | |
18771 | { | |
18772 | #if 0 | |
18773 | /* Some types that would be reasonable to generate partial symbols for, | |
d8f62e84 TT |
18774 | that we don't at present. Note that normally this does not |
18775 | matter, mainly because C compilers don't give names to these | |
18776 | types, but instead emit DW_TAG_typedef. */ | |
72bf9492 DJ |
18777 | case DW_TAG_file_type: |
18778 | case DW_TAG_ptr_to_member_type: | |
18779 | case DW_TAG_set_type: | |
18780 | case DW_TAG_string_type: | |
18781 | case DW_TAG_subroutine_type: | |
18782 | #endif | |
d8f62e84 TT |
18783 | |
18784 | /* GNAT may emit an array with a name, but no typedef, so we | |
18785 | need to make a symbol in this case. */ | |
18786 | case DW_TAG_array_type: | |
18787 | return lang == language_ada; | |
18788 | ||
72bf9492 DJ |
18789 | case DW_TAG_base_type: |
18790 | case DW_TAG_class_type: | |
680b30c7 | 18791 | case DW_TAG_interface_type: |
72bf9492 DJ |
18792 | case DW_TAG_enumeration_type: |
18793 | case DW_TAG_structure_type: | |
18794 | case DW_TAG_subrange_type: | |
18795 | case DW_TAG_typedef: | |
18796 | case DW_TAG_union_type: | |
18797 | return 1; | |
18798 | default: | |
18799 | return 0; | |
18800 | } | |
18801 | } | |
18802 | ||
18803 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18804 | ||
18805 | static struct partial_die_info * | |
dee91e82 | 18806 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18807 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18808 | { |
dee91e82 | 18809 | struct dwarf2_cu *cu = reader->cu; |
5e22e966 | 18810 | struct objfile *objfile = cu->per_objfile->objfile; |
72bf9492 | 18811 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18812 | unsigned int bytes_read; |
5afb4e99 | 18813 | unsigned int load_all = 0; |
72bf9492 DJ |
18814 | int nesting_level = 1; |
18815 | ||
18816 | parent_die = NULL; | |
18817 | last_die = NULL; | |
18818 | ||
7adf1e79 DE |
18819 | gdb_assert (cu->per_cu != NULL); |
18820 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18821 | load_all = 1; |
18822 | ||
72bf9492 DJ |
18823 | cu->partial_dies |
18824 | = htab_create_alloc_ex (cu->header.length / 12, | |
18825 | partial_die_hash, | |
18826 | partial_die_eq, | |
18827 | NULL, | |
18828 | &cu->comp_unit_obstack, | |
18829 | hashtab_obstack_allocate, | |
18830 | dummy_obstack_deallocate); | |
18831 | ||
72bf9492 DJ |
18832 | while (1) |
18833 | { | |
7c32eebb TT |
18834 | const abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, |
18835 | &bytes_read); | |
72bf9492 DJ |
18836 | |
18837 | /* A NULL abbrev means the end of a series of children. */ | |
18838 | if (abbrev == NULL) | |
18839 | { | |
18840 | if (--nesting_level == 0) | |
cd9983dd YQ |
18841 | return first_die; |
18842 | ||
72bf9492 DJ |
18843 | info_ptr += bytes_read; |
18844 | last_die = parent_die; | |
18845 | parent_die = parent_die->die_parent; | |
18846 | continue; | |
18847 | } | |
18848 | ||
98bfdba5 PA |
18849 | /* Check for template arguments. We never save these; if |
18850 | they're seen, we just mark the parent, and go on our way. */ | |
18851 | if (parent_die != NULL | |
18852 | && cu->language == language_cplus | |
18853 | && (abbrev->tag == DW_TAG_template_type_param | |
18854 | || abbrev->tag == DW_TAG_template_value_param)) | |
18855 | { | |
18856 | parent_die->has_template_arguments = 1; | |
18857 | ||
18858 | if (!load_all) | |
18859 | { | |
18860 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18861 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18862 | continue; |
18863 | } | |
18864 | } | |
18865 | ||
0d99eb77 | 18866 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18867 | Skip their other children. */ |
18868 | if (!load_all | |
18869 | && cu->language == language_cplus | |
18870 | && parent_die != NULL | |
f9b5d5ea TV |
18871 | && parent_die->tag == DW_TAG_subprogram |
18872 | && abbrev->tag != DW_TAG_inlined_subroutine) | |
98bfdba5 | 18873 | { |
dee91e82 | 18874 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18875 | continue; |
18876 | } | |
18877 | ||
5afb4e99 DJ |
18878 | /* Check whether this DIE is interesting enough to save. Normally |
18879 | we would not be interested in members here, but there may be | |
18880 | later variables referencing them via DW_AT_specification (for | |
18881 | static members). */ | |
18882 | if (!load_all | |
d8f62e84 | 18883 | && !is_type_tag_for_partial (abbrev->tag, cu->language) |
72929c62 | 18884 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18885 | && abbrev->tag != DW_TAG_enumerator |
18886 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18887 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18888 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18889 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18890 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18891 | && abbrev->tag != DW_TAG_module |
95554aad | 18892 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18893 | && abbrev->tag != DW_TAG_imported_unit |
18894 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18895 | { |
18896 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18897 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18898 | continue; |
18899 | } | |
18900 | ||
6f06d47b YQ |
18901 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18902 | abbrev); | |
cd9983dd | 18903 | |
48fbe735 | 18904 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18905 | |
18906 | /* This two-pass algorithm for processing partial symbols has a | |
18907 | high cost in cache pressure. Thus, handle some simple cases | |
18908 | here which cover the majority of C partial symbols. DIEs | |
18909 | which neither have specification tags in them, nor could have | |
18910 | specification tags elsewhere pointing at them, can simply be | |
18911 | processed and discarded. | |
18912 | ||
18913 | This segment is also optional; scan_partial_symbols and | |
18914 | add_partial_symbol will handle these DIEs if we chain | |
18915 | them in normally. When compilers which do not emit large | |
18916 | quantities of duplicate debug information are more common, | |
18917 | this code can probably be removed. */ | |
18918 | ||
18919 | /* Any complete simple types at the top level (pretty much all | |
18920 | of them, for a language without namespaces), can be processed | |
18921 | directly. */ | |
18922 | if (parent_die == NULL | |
cd9983dd YQ |
18923 | && pdi.has_specification == 0 |
18924 | && pdi.is_declaration == 0 | |
18925 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18926 | || pdi.tag == DW_TAG_base_type | |
d8f62e84 | 18927 | || pdi.tag == DW_TAG_array_type |
cd9983dd | 18928 | || pdi.tag == DW_TAG_subrange_type)) |
72bf9492 | 18929 | { |
7d00ffec | 18930 | if (building_psymtab && pdi.raw_name != NULL) |
f0fbb768 TT |
18931 | add_partial_symbol (&pdi, cu); |
18932 | ||
cd9983dd | 18933 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18934 | continue; |
18935 | } | |
18936 | ||
d8228535 JK |
18937 | /* The exception for DW_TAG_typedef with has_children above is |
18938 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18939 | type_name_or_error will error on such types later. |
d8228535 JK |
18940 | |
18941 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18942 | it could not find the child DIEs referenced later, this is checked | |
18943 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18944 | ||
cd9983dd | 18945 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18946 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18947 | "- DIE at %s [in module %s]"), |
cd9983dd | 18948 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18949 | |
72bf9492 DJ |
18950 | /* If we're at the second level, and we're an enumerator, and |
18951 | our parent has no specification (meaning possibly lives in a | |
18952 | namespace elsewhere), then we can add the partial symbol now | |
18953 | instead of queueing it. */ | |
cd9983dd | 18954 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18955 | && parent_die != NULL |
18956 | && parent_die->die_parent == NULL | |
18957 | && parent_die->tag == DW_TAG_enumeration_type | |
18958 | && parent_die->has_specification == 0) | |
18959 | { | |
7d00ffec | 18960 | if (pdi.raw_name == NULL) |
b98664d3 | 18961 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18962 | else if (building_psymtab) |
f0fbb768 | 18963 | add_partial_symbol (&pdi, cu); |
72bf9492 | 18964 | |
cd9983dd | 18965 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18966 | continue; |
18967 | } | |
18968 | ||
cd9983dd | 18969 | struct partial_die_info *part_die |
6f06d47b | 18970 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18971 | |
72bf9492 DJ |
18972 | /* We'll save this DIE so link it in. */ |
18973 | part_die->die_parent = parent_die; | |
18974 | part_die->die_sibling = NULL; | |
18975 | part_die->die_child = NULL; | |
18976 | ||
18977 | if (last_die && last_die == parent_die) | |
18978 | last_die->die_child = part_die; | |
18979 | else if (last_die) | |
18980 | last_die->die_sibling = part_die; | |
18981 | ||
18982 | last_die = part_die; | |
18983 | ||
18984 | if (first_die == NULL) | |
18985 | first_die = part_die; | |
18986 | ||
18987 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18988 | find interesting need to be in the hash table, because we | |
18989 | also have the parent/sibling/child chains; only those that we | |
18990 | might refer to by offset later during partial symbol reading. | |
18991 | ||
18992 | For now this means things that might have be the target of a | |
18993 | DW_AT_specification, DW_AT_abstract_origin, or | |
18994 | DW_AT_extension. DW_AT_extension will refer only to | |
18995 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18996 | many things under the function DIE, but we do not recurse | |
18997 | into function DIEs during partial symbol reading) and | |
18998 | possibly variables as well; DW_AT_specification refers to | |
18999 | declarations. Declarations ought to have the DW_AT_declaration | |
19000 | flag. It happens that GCC forgets to put it in sometimes, but | |
19001 | only for functions, not for types. | |
19002 | ||
19003 | Adding more things than necessary to the hash table is harmless | |
19004 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
19005 | wasted time in find_partial_die, when we reread the compilation |
19006 | unit with load_all_dies set. */ | |
72bf9492 | 19007 | |
5afb4e99 | 19008 | if (load_all |
72929c62 | 19009 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 19010 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
19011 | || abbrev->tag == DW_TAG_variable |
19012 | || abbrev->tag == DW_TAG_namespace | |
19013 | || part_die->is_declaration) | |
19014 | { | |
19015 | void **slot; | |
19016 | ||
19017 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
19018 | to_underlying (part_die->sect_off), |
19019 | INSERT); | |
72bf9492 DJ |
19020 | *slot = part_die; |
19021 | } | |
19022 | ||
72bf9492 | 19023 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 19024 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
19025 | languages we have to, so that we can get at method physnames |
19026 | to infer fully qualified class names, for DW_AT_specification, | |
19027 | and for C++ template arguments. For C++, we also look one level | |
19028 | inside functions to find template arguments (if the name of the | |
19029 | function does not already contain the template arguments). | |
bc30ff58 | 19030 | |
0a4b0913 AB |
19031 | For Ada and Fortran, we need to scan the children of subprograms |
19032 | and lexical blocks as well because these languages allow the | |
19033 | definition of nested entities that could be interesting for the | |
19034 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 19035 | if (last_die->has_children |
5afb4e99 DJ |
19036 | && (load_all |
19037 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 19038 | || last_die->tag == DW_TAG_module |
72bf9492 | 19039 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
19040 | || (cu->language == language_cplus |
19041 | && last_die->tag == DW_TAG_subprogram | |
7d00ffec TT |
19042 | && (last_die->raw_name == NULL |
19043 | || strchr (last_die->raw_name, '<') == NULL)) | |
72bf9492 DJ |
19044 | || (cu->language != language_c |
19045 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 19046 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 19047 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 19048 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
19049 | || ((cu->language == language_ada |
19050 | || cu->language == language_fortran) | |
bc30ff58 JB |
19051 | && (last_die->tag == DW_TAG_subprogram |
19052 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
19053 | { |
19054 | nesting_level++; | |
19055 | parent_die = last_die; | |
19056 | continue; | |
19057 | } | |
19058 | ||
19059 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 19060 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
19061 | |
19062 | /* Back to the top, do it again. */ | |
19063 | } | |
19064 | } | |
19065 | ||
6f06d47b | 19066 | partial_die_info::partial_die_info (sect_offset sect_off_, |
7c32eebb | 19067 | const struct abbrev_info *abbrev) |
6f06d47b YQ |
19068 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) |
19069 | { | |
19070 | } | |
19071 | ||
7d00ffec TT |
19072 | /* See class definition. */ |
19073 | ||
19074 | const char * | |
19075 | partial_die_info::name (dwarf2_cu *cu) | |
19076 | { | |
19077 | if (!canonical_name && raw_name != nullptr) | |
19078 | { | |
19079 | struct objfile *objfile = cu->per_objfile->objfile; | |
19080 | raw_name = dwarf2_canonicalize_name (raw_name, cu, objfile); | |
19081 | canonical_name = 1; | |
19082 | } | |
19083 | ||
19084 | return raw_name; | |
19085 | } | |
19086 | ||
35cc7ed7 YQ |
19087 | /* Read a minimal amount of information into the minimal die structure. |
19088 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 19089 | |
48fbe735 YQ |
19090 | const gdb_byte * |
19091 | partial_die_info::read (const struct die_reader_specs *reader, | |
19092 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 19093 | { |
dee91e82 | 19094 | struct dwarf2_cu *cu = reader->cu; |
976ca316 | 19095 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
fa238c03 | 19096 | unsigned int i; |
c5aa993b | 19097 | int has_low_pc_attr = 0; |
c906108c | 19098 | int has_high_pc_attr = 0; |
91da1414 | 19099 | int high_pc_relative = 0; |
c906108c | 19100 | |
fd0a254f | 19101 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 19102 | { |
e7da7f8f | 19103 | attribute attr; |
7a5f294d | 19104 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
18a8505e | 19105 | /* String and address offsets that need to do the reprocessing have |
dda83cd7 | 19106 | already been read at this point, so there is no need to wait until |
18a8505e | 19107 | the loop terminates to do the reprocessing. */ |
7a5f294d | 19108 | if (attr.requires_reprocessing_p ()) |
d0ce17d8 | 19109 | read_attribute_reprocess (reader, &attr, tag); |
c906108c | 19110 | /* Store the data if it is of an attribute we want to keep in a |
dda83cd7 | 19111 | partial symbol table. */ |
c906108c SS |
19112 | switch (attr.name) |
19113 | { | |
19114 | case DW_AT_name: | |
48fbe735 | 19115 | switch (tag) |
71c25dea TT |
19116 | { |
19117 | case DW_TAG_compile_unit: | |
95554aad | 19118 | case DW_TAG_partial_unit: |
348e048f | 19119 | case DW_TAG_type_unit: |
71c25dea TT |
19120 | /* Compilation units have a DW_AT_name that is a filename, not |
19121 | a source language identifier. */ | |
19122 | case DW_TAG_enumeration_type: | |
19123 | case DW_TAG_enumerator: | |
19124 | /* These tags always have simple identifiers already; no need | |
19125 | to canonicalize them. */ | |
7d00ffec | 19126 | canonical_name = 1; |
2c830f54 | 19127 | raw_name = attr.as_string (); |
71c25dea TT |
19128 | break; |
19129 | default: | |
7d00ffec | 19130 | canonical_name = 0; |
2c830f54 | 19131 | raw_name = attr.as_string (); |
71c25dea TT |
19132 | break; |
19133 | } | |
c906108c | 19134 | break; |
31ef98ae | 19135 | case DW_AT_linkage_name: |
c906108c | 19136 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
19137 | /* Note that both forms of linkage name might appear. We |
19138 | assume they will be the same, and we only store the last | |
19139 | one we see. */ | |
95f982e5 | 19140 | linkage_name = attr.as_string (); |
c906108c SS |
19141 | break; |
19142 | case DW_AT_low_pc: | |
19143 | has_low_pc_attr = 1; | |
95f982e5 | 19144 | lowpc = attr.as_address (); |
c906108c SS |
19145 | break; |
19146 | case DW_AT_high_pc: | |
19147 | has_high_pc_attr = 1; | |
95f982e5 | 19148 | highpc = attr.as_address (); |
cd6c91b4 | 19149 | if (cu->header.version >= 4 && attr.form_is_constant ()) |
31aa7e4e | 19150 | high_pc_relative = 1; |
c906108c SS |
19151 | break; |
19152 | case DW_AT_location: | |
dda83cd7 SM |
19153 | /* Support the .debug_loc offsets. */ |
19154 | if (attr.form_is_block ()) | |
19155 | { | |
9d2246fc | 19156 | d.locdesc = attr.as_block (); |
dda83cd7 SM |
19157 | } |
19158 | else if (attr.form_is_section_offset ()) | |
19159 | { | |
4d3c2250 | 19160 | dwarf2_complex_location_expr_complaint (); |
dda83cd7 SM |
19161 | } |
19162 | else | |
19163 | { | |
4d3c2250 KB |
19164 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
19165 | "partial symbol information"); | |
dda83cd7 | 19166 | } |
c906108c | 19167 | break; |
c906108c | 19168 | case DW_AT_external: |
c45bc3f8 | 19169 | is_external = attr.as_boolean (); |
c906108c SS |
19170 | break; |
19171 | case DW_AT_declaration: | |
c45bc3f8 | 19172 | is_declaration = attr.as_boolean (); |
c906108c SS |
19173 | break; |
19174 | case DW_AT_type: | |
48fbe735 | 19175 | has_type = 1; |
c906108c SS |
19176 | break; |
19177 | case DW_AT_abstract_origin: | |
19178 | case DW_AT_specification: | |
72bf9492 | 19179 | case DW_AT_extension: |
48fbe735 | 19180 | has_specification = 1; |
0826b30a | 19181 | spec_offset = attr.get_ref_die_offset (); |
48fbe735 | 19182 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 | 19183 | || cu->per_cu->is_dwz); |
c906108c SS |
19184 | break; |
19185 | case DW_AT_sibling: | |
19186 | /* Ignore absolute siblings, they might point outside of | |
19187 | the current compile unit. */ | |
19188 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 19189 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 19190 | else |
b9502d3f | 19191 | { |
48fbe735 | 19192 | const gdb_byte *buffer = reader->buffer; |
0826b30a | 19193 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 19194 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
19195 | |
19196 | if (sibling_ptr < info_ptr) | |
b98664d3 | 19197 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 19198 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 19199 | reader->die_section->overflow_complaint (); |
b9502d3f | 19200 | else |
48fbe735 | 19201 | sibling = sibling_ptr; |
b9502d3f | 19202 | } |
c906108c | 19203 | break; |
dda83cd7 SM |
19204 | case DW_AT_byte_size: |
19205 | has_byte_size = 1; | |
19206 | break; | |
19207 | case DW_AT_const_value: | |
19208 | has_const_value = 1; | |
19209 | break; | |
68511cec CES |
19210 | case DW_AT_calling_convention: |
19211 | /* DWARF doesn't provide a way to identify a program's source-level | |
19212 | entry point. DW_AT_calling_convention attributes are only meant | |
19213 | to describe functions' calling conventions. | |
19214 | ||
19215 | However, because it's a necessary piece of information in | |
0c1b455e TT |
19216 | Fortran, and before DWARF 4 DW_CC_program was the only |
19217 | piece of debugging information whose definition refers to | |
19218 | a 'main program' at all, several compilers marked Fortran | |
19219 | main programs with DW_CC_program --- even when those | |
19220 | functions use the standard calling conventions. | |
19221 | ||
19222 | Although DWARF now specifies a way to provide this | |
19223 | information, we support this practice for backward | |
19224 | compatibility. */ | |
529908cb | 19225 | if (attr.constant_value (0) == DW_CC_program |
0c1b455e | 19226 | && cu->language == language_fortran) |
48fbe735 | 19227 | main_subprogram = 1; |
68511cec | 19228 | break; |
481860b3 | 19229 | case DW_AT_inline: |
529908cb TT |
19230 | { |
19231 | LONGEST value = attr.constant_value (-1); | |
19232 | if (value == DW_INL_inlined | |
19233 | || value == DW_INL_declared_inlined) | |
19234 | may_be_inlined = 1; | |
19235 | } | |
481860b3 | 19236 | break; |
95554aad TT |
19237 | |
19238 | case DW_AT_import: | |
48fbe735 | 19239 | if (tag == DW_TAG_imported_unit) |
36586728 | 19240 | { |
0826b30a | 19241 | d.sect_off = attr.get_ref_die_offset (); |
48fbe735 | 19242 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 TT |
19243 | || cu->per_cu->is_dwz); |
19244 | } | |
95554aad TT |
19245 | break; |
19246 | ||
0c1b455e | 19247 | case DW_AT_main_subprogram: |
c45bc3f8 | 19248 | main_subprogram = attr.as_boolean (); |
0c1b455e TT |
19249 | break; |
19250 | ||
05caa1d2 TT |
19251 | case DW_AT_ranges: |
19252 | { | |
2b0c7f41 SM |
19253 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
19254 | on DWARF version). */ | |
19255 | ULONGEST ranges_offset = attr.as_unsigned (); | |
19256 | ||
19257 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add | |
19258 | this value. */ | |
19259 | if (tag != DW_TAG_compile_unit) | |
19260 | ranges_offset += cu->gnu_ranges_base; | |
19261 | ||
05caa1d2 | 19262 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, |
d0ce17d8 | 19263 | nullptr, tag)) |
05caa1d2 TT |
19264 | has_pc_info = 1; |
19265 | } | |
19266 | break; | |
19267 | ||
c906108c SS |
19268 | default: |
19269 | break; | |
19270 | } | |
19271 | } | |
19272 | ||
10d06d82 TT |
19273 | /* For Ada, if both the name and the linkage name appear, we prefer |
19274 | the latter. This lets "catch exception" work better, regardless | |
19275 | of the order in which the name and linkage name were emitted. | |
19276 | Really, though, this is just a workaround for the fact that gdb | |
19277 | doesn't store both the name and the linkage name. */ | |
19278 | if (cu->language == language_ada && linkage_name != nullptr) | |
7d00ffec | 19279 | raw_name = linkage_name; |
10d06d82 | 19280 | |
91da1414 | 19281 | if (high_pc_relative) |
48fbe735 | 19282 | highpc += lowpc; |
91da1414 | 19283 | |
9373cf26 JK |
19284 | if (has_low_pc_attr && has_high_pc_attr) |
19285 | { | |
19286 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
19287 | eliminate duplicate copies of functions and vtables and such. | |
19288 | The linker will arbitrarily choose one and discard the others. | |
19289 | The AT_*_pc values for such functions refer to local labels in | |
19290 | these sections. If the section from that file was discarded, the | |
19291 | labels are not in the output, so the relocs get a value of 0. | |
19292 | If this is a discarded function, mark the pc bounds as invalid, | |
19293 | so that GDB will ignore it. */ | |
976ca316 | 19294 | if (lowpc == 0 && !per_objfile->per_bfd->has_section_at_zero) |
9373cf26 | 19295 | { |
976ca316 | 19296 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 19297 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 19298 | |
b98664d3 | 19299 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 19300 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19301 | paddress (gdbarch, lowpc), |
19302 | sect_offset_str (sect_off), | |
9d8780f0 | 19303 | objfile_name (objfile)); |
9373cf26 JK |
19304 | } |
19305 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 19306 | else if (lowpc >= highpc) |
9373cf26 | 19307 | { |
976ca316 | 19308 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 19309 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 19310 | |
b98664d3 | 19311 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 19312 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19313 | paddress (gdbarch, lowpc), |
19314 | paddress (gdbarch, highpc), | |
19315 | sect_offset_str (sect_off), | |
9c541725 | 19316 | objfile_name (objfile)); |
9373cf26 JK |
19317 | } |
19318 | else | |
48fbe735 | 19319 | has_pc_info = 1; |
9373cf26 | 19320 | } |
85cbf3d3 | 19321 | |
c906108c SS |
19322 | return info_ptr; |
19323 | } | |
19324 | ||
72bf9492 DJ |
19325 | /* Find a cached partial DIE at OFFSET in CU. */ |
19326 | ||
d590ff25 YQ |
19327 | struct partial_die_info * |
19328 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
19329 | { |
19330 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 19331 | struct partial_die_info part_die (sect_off); |
72bf9492 | 19332 | |
9a3c8263 | 19333 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 19334 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 19335 | to_underlying (sect_off))); |
72bf9492 | 19336 | |
72bf9492 DJ |
19337 | return lookup_die; |
19338 | } | |
19339 | ||
348e048f DE |
19340 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
19341 | except in the case of .debug_types DIEs which do not reference | |
19342 | outside their CU (they do however referencing other types via | |
55f1336d | 19343 | DW_FORM_ref_sig8). */ |
72bf9492 | 19344 | |
122cf0f2 | 19345 | static const struct cu_partial_die_info |
9c541725 | 19346 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 19347 | { |
976ca316 SM |
19348 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19349 | struct objfile *objfile = per_objfile->objfile; | |
5afb4e99 | 19350 | struct partial_die_info *pd = NULL; |
72bf9492 | 19351 | |
36586728 | 19352 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 19353 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 19354 | { |
d590ff25 | 19355 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 19356 | if (pd != NULL) |
fb816e8b | 19357 | return { cu, pd }; |
0d99eb77 DE |
19358 | /* We missed recording what we needed. |
19359 | Load all dies and try again. */ | |
5afb4e99 | 19360 | } |
0d99eb77 DE |
19361 | else |
19362 | { | |
19363 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 19364 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 19365 | { |
9d8780f0 SM |
19366 | error (_("Dwarf Error: Type Unit at offset %s contains" |
19367 | " external reference to offset %s [in module %s].\n"), | |
19368 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
19369 | bfd_get_filename (objfile->obfd)); |
19370 | } | |
7188ed02 SM |
19371 | dwarf2_per_cu_data *per_cu |
19372 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
976ca316 | 19373 | per_objfile); |
72bf9492 | 19374 | |
976ca316 | 19375 | cu = per_objfile->get_cu (per_cu); |
7188ed02 | 19376 | if (cu == NULL || cu->partial_dies == NULL) |
976ca316 | 19377 | load_partial_comp_unit (per_cu, per_objfile, nullptr); |
ae038cb0 | 19378 | |
976ca316 | 19379 | cu = per_objfile->get_cu (per_cu); |
7188ed02 SM |
19380 | |
19381 | cu->last_used = 0; | |
19382 | pd = cu->find_partial_die (sect_off); | |
0d99eb77 | 19383 | } |
5afb4e99 | 19384 | |
dee91e82 DE |
19385 | /* If we didn't find it, and not all dies have been loaded, |
19386 | load them all and try again. */ | |
19387 | ||
7188ed02 | 19388 | if (pd == NULL && cu->per_cu->load_all_dies == 0) |
5afb4e99 | 19389 | { |
7188ed02 | 19390 | cu->per_cu->load_all_dies = 1; |
fd820528 DE |
19391 | |
19392 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
19393 | THIS_CU->cu may already be in use. So we can't just free it and | |
19394 | replace its DIEs with the ones we read in. Instead, we leave those | |
19395 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
19396 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
19397 | set. */ | |
976ca316 | 19398 | load_partial_comp_unit (cu->per_cu, per_objfile, cu); |
5afb4e99 | 19399 | |
7188ed02 | 19400 | pd = cu->find_partial_die (sect_off); |
5afb4e99 DJ |
19401 | } |
19402 | ||
19403 | if (pd == NULL) | |
521894aa | 19404 | error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"), |
9d8780f0 | 19405 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
7188ed02 | 19406 | return { cu, pd }; |
72bf9492 DJ |
19407 | } |
19408 | ||
abc72ce4 DE |
19409 | /* See if we can figure out if the class lives in a namespace. We do |
19410 | this by looking for a member function; its demangled name will | |
19411 | contain namespace info, if there is any. */ | |
19412 | ||
19413 | static void | |
19414 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
19415 | struct dwarf2_cu *cu) | |
19416 | { | |
19417 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
19418 | what template types look like, because the demangler | |
19419 | frequently doesn't give the same name as the debug info. We | |
19420 | could fix this by only using the demangled name to get the | |
19421 | prefix (but see comment in read_structure_type). */ | |
19422 | ||
19423 | struct partial_die_info *real_pdi; | |
19424 | struct partial_die_info *child_pdi; | |
19425 | ||
19426 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
19427 | we should not do this. We'll prepend the parent's fully qualified | |
19428 | name when we create the partial symbol. */ | |
19429 | ||
19430 | real_pdi = struct_pdi; | |
19431 | while (real_pdi->has_specification) | |
fb816e8b | 19432 | { |
122cf0f2 AB |
19433 | auto res = find_partial_die (real_pdi->spec_offset, |
19434 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
19435 | real_pdi = res.pdi; |
19436 | cu = res.cu; | |
19437 | } | |
abc72ce4 DE |
19438 | |
19439 | if (real_pdi->die_parent != NULL) | |
19440 | return; | |
19441 | ||
19442 | for (child_pdi = struct_pdi->die_child; | |
19443 | child_pdi != NULL; | |
19444 | child_pdi = child_pdi->die_sibling) | |
19445 | { | |
19446 | if (child_pdi->tag == DW_TAG_subprogram | |
19447 | && child_pdi->linkage_name != NULL) | |
19448 | { | |
43816ebc | 19449 | gdb::unique_xmalloc_ptr<char> actual_class_name |
eff93b4d AB |
19450 | (cu->language_defn->class_name_from_physname |
19451 | (child_pdi->linkage_name)); | |
abc72ce4 DE |
19452 | if (actual_class_name != NULL) |
19453 | { | |
5e22e966 | 19454 | struct objfile *objfile = cu->per_objfile->objfile; |
7d00ffec TT |
19455 | struct_pdi->raw_name = objfile->intern (actual_class_name.get ()); |
19456 | struct_pdi->canonical_name = 1; | |
abc72ce4 DE |
19457 | } |
19458 | break; | |
19459 | } | |
19460 | } | |
19461 | } | |
19462 | ||
25c11aca TV |
19463 | /* Return true if a DIE with TAG may have the DW_AT_const_value |
19464 | attribute. */ | |
19465 | ||
19466 | static bool | |
19467 | can_have_DW_AT_const_value_p (enum dwarf_tag tag) | |
19468 | { | |
19469 | switch (tag) | |
19470 | { | |
19471 | case DW_TAG_constant: | |
19472 | case DW_TAG_enumerator: | |
19473 | case DW_TAG_formal_parameter: | |
19474 | case DW_TAG_template_value_param: | |
19475 | case DW_TAG_variable: | |
19476 | return true; | |
19477 | } | |
19478 | ||
19479 | return false; | |
19480 | } | |
19481 | ||
52356b79 YQ |
19482 | void |
19483 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 19484 | { |
abc72ce4 DE |
19485 | /* Once we've fixed up a die, there's no point in doing so again. |
19486 | This also avoids a memory leak if we were to call | |
19487 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 19488 | if (fixup_called) |
abc72ce4 DE |
19489 | return; |
19490 | ||
72bf9492 DJ |
19491 | /* If we found a reference attribute and the DIE has no name, try |
19492 | to find a name in the referred to DIE. */ | |
19493 | ||
7d00ffec | 19494 | if (raw_name == NULL && has_specification) |
72bf9492 DJ |
19495 | { |
19496 | struct partial_die_info *spec_die; | |
72bf9492 | 19497 | |
122cf0f2 | 19498 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
19499 | spec_die = res.pdi; |
19500 | cu = res.cu; | |
72bf9492 | 19501 | |
52356b79 | 19502 | spec_die->fixup (cu); |
72bf9492 | 19503 | |
7d00ffec | 19504 | if (spec_die->raw_name) |
72bf9492 | 19505 | { |
7d00ffec TT |
19506 | raw_name = spec_die->raw_name; |
19507 | canonical_name = spec_die->canonical_name; | |
72bf9492 DJ |
19508 | |
19509 | /* Copy DW_AT_external attribute if it is set. */ | |
19510 | if (spec_die->is_external) | |
52356b79 | 19511 | is_external = spec_die->is_external; |
72bf9492 DJ |
19512 | } |
19513 | } | |
19514 | ||
25c11aca TV |
19515 | if (!has_const_value && has_specification |
19516 | && can_have_DW_AT_const_value_p (tag)) | |
19517 | { | |
19518 | struct partial_die_info *spec_die; | |
19519 | ||
19520 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); | |
19521 | spec_die = res.pdi; | |
19522 | cu = res.cu; | |
19523 | ||
19524 | spec_die->fixup (cu); | |
19525 | ||
19526 | if (spec_die->has_const_value) | |
19527 | { | |
19528 | /* Copy DW_AT_const_value attribute if it is set. */ | |
19529 | has_const_value = spec_die->has_const_value; | |
19530 | } | |
19531 | } | |
19532 | ||
72bf9492 | 19533 | /* Set default names for some unnamed DIEs. */ |
72bf9492 | 19534 | |
7d00ffec TT |
19535 | if (raw_name == NULL && tag == DW_TAG_namespace) |
19536 | { | |
19537 | raw_name = CP_ANONYMOUS_NAMESPACE_STR; | |
19538 | canonical_name = 1; | |
19539 | } | |
72bf9492 | 19540 | |
abc72ce4 DE |
19541 | /* If there is no parent die to provide a namespace, and there are |
19542 | children, see if we can determine the namespace from their linkage | |
122d1940 | 19543 | name. */ |
abc72ce4 | 19544 | if (cu->language == language_cplus |
5e22e966 | 19545 | && !cu->per_objfile->per_bfd->types.empty () |
52356b79 YQ |
19546 | && die_parent == NULL |
19547 | && has_children | |
19548 | && (tag == DW_TAG_class_type | |
19549 | || tag == DW_TAG_structure_type | |
19550 | || tag == DW_TAG_union_type)) | |
19551 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 19552 | |
53832f31 TT |
19553 | /* GCC might emit a nameless struct or union that has a linkage |
19554 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
7d00ffec | 19555 | if (raw_name == NULL |
52356b79 YQ |
19556 | && (tag == DW_TAG_class_type |
19557 | || tag == DW_TAG_interface_type | |
19558 | || tag == DW_TAG_structure_type | |
19559 | || tag == DW_TAG_union_type) | |
19560 | && linkage_name != NULL) | |
53832f31 | 19561 | { |
43816ebc TT |
19562 | gdb::unique_xmalloc_ptr<char> demangled |
19563 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
19564 | if (demangled != nullptr) | |
53832f31 | 19565 | { |
96408a79 SA |
19566 | const char *base; |
19567 | ||
19568 | /* Strip any leading namespaces/classes, keep only the base name. | |
19569 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
19570 | base = strrchr (demangled.get (), ':'); |
19571 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
19572 | base++; |
19573 | else | |
43816ebc | 19574 | base = demangled.get (); |
96408a79 | 19575 | |
5e22e966 | 19576 | struct objfile *objfile = cu->per_objfile->objfile; |
7d00ffec TT |
19577 | raw_name = objfile->intern (base); |
19578 | canonical_name = 1; | |
53832f31 TT |
19579 | } |
19580 | } | |
19581 | ||
52356b79 | 19582 | fixup_called = 1; |
72bf9492 DJ |
19583 | } |
19584 | ||
d0ce17d8 | 19585 | /* Read the .debug_loclists or .debug_rnglists header (they are the same format) |
a1c40103 SM |
19586 | contents from the given SECTION in the HEADER. |
19587 | ||
19588 | HEADER_OFFSET is the offset of the header in the section. */ | |
41144253 | 19589 | static void |
d0ce17d8 | 19590 | read_loclists_rnglists_header (struct loclists_rnglists_header *header, |
a1c40103 SM |
19591 | struct dwarf2_section_info *section, |
19592 | sect_offset header_offset) | |
41144253 | 19593 | { |
19594 | unsigned int bytes_read; | |
19595 | bfd *abfd = section->get_bfd_owner (); | |
a1c40103 SM |
19596 | const gdb_byte *info_ptr = section->buffer + to_underlying (header_offset); |
19597 | ||
41144253 | 19598 | header->length = read_initial_length (abfd, info_ptr, &bytes_read); |
19599 | info_ptr += bytes_read; | |
a1c40103 | 19600 | |
41144253 | 19601 | header->version = read_2_bytes (abfd, info_ptr); |
19602 | info_ptr += 2; | |
a1c40103 | 19603 | |
41144253 | 19604 | header->addr_size = read_1_byte (abfd, info_ptr); |
19605 | info_ptr += 1; | |
a1c40103 | 19606 | |
41144253 | 19607 | header->segment_collector_size = read_1_byte (abfd, info_ptr); |
19608 | info_ptr += 1; | |
a1c40103 | 19609 | |
41144253 | 19610 | header->offset_entry_count = read_4_bytes (abfd, info_ptr); |
19611 | } | |
19612 | ||
19613 | /* Return the DW_AT_loclists_base value for the CU. */ | |
19614 | static ULONGEST | |
19615 | lookup_loclist_base (struct dwarf2_cu *cu) | |
19616 | { | |
19617 | /* For the .dwo unit, the loclist_base points to the first offset following | |
19618 | the header. The header consists of the following entities- | |
19619 | 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64 | |
19620 | bit format) | |
19621 | 2. version (2 bytes) | |
19622 | 3. address size (1 byte) | |
19623 | 4. segment selector size (1 byte) | |
19624 | 5. offset entry count (4 bytes) | |
19625 | These sizes are derived as per the DWARFv5 standard. */ | |
19626 | if (cu->dwo_unit != nullptr) | |
19627 | { | |
19628 | if (cu->header.initial_length_size == 4) | |
19629 | return LOCLIST_HEADER_SIZE32; | |
19630 | return LOCLIST_HEADER_SIZE64; | |
19631 | } | |
19632 | return cu->loclist_base; | |
19633 | } | |
19634 | ||
19635 | /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the | |
19636 | array of offsets in the .debug_loclists section. */ | |
e57933dc SM |
19637 | |
19638 | static sect_offset | |
41144253 | 19639 | read_loclist_index (struct dwarf2_cu *cu, ULONGEST loclist_index) |
19640 | { | |
976ca316 SM |
19641 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19642 | struct objfile *objfile = per_objfile->objfile; | |
41144253 | 19643 | bfd *abfd = objfile->obfd; |
a1c40103 SM |
19644 | ULONGEST loclist_header_size = |
19645 | (cu->header.initial_length_size == 4 ? LOCLIST_HEADER_SIZE32 | |
19646 | : LOCLIST_HEADER_SIZE64); | |
41144253 | 19647 | ULONGEST loclist_base = lookup_loclist_base (cu); |
05787bad SM |
19648 | |
19649 | /* Offset in .debug_loclists of the offset for LOCLIST_INDEX. */ | |
19650 | ULONGEST start_offset = | |
19651 | loclist_base + loclist_index * cu->header.offset_size; | |
19652 | ||
a1c40103 | 19653 | /* Get loclists section. */ |
41144253 | 19654 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
19655 | ||
a1c40103 | 19656 | /* Read the loclists section content. */ |
41144253 | 19657 | section->read (objfile); |
19658 | if (section->buffer == NULL) | |
a0c1eeba SM |
19659 | error (_("DW_FORM_loclistx used without .debug_loclists " |
19660 | "section [in module %s]"), objfile_name (objfile)); | |
19661 | ||
a1c40103 SM |
19662 | /* DW_AT_loclists_base points after the .debug_loclists contribution header, |
19663 | so if loclist_base is smaller than the header size, we have a problem. */ | |
19664 | if (loclist_base < loclist_header_size) | |
19665 | error (_("DW_AT_loclists_base is smaller than header size [in module %s]"), | |
19666 | objfile_name (objfile)); | |
19667 | ||
19668 | /* Read the header of the loclists contribution. */ | |
d0ce17d8 | 19669 | struct loclists_rnglists_header header; |
a1c40103 SM |
19670 | read_loclists_rnglists_header (&header, section, |
19671 | (sect_offset) (loclist_base - loclist_header_size)); | |
19672 | ||
19673 | /* Verify the loclist index is valid. */ | |
41144253 | 19674 | if (loclist_index >= header.offset_entry_count) |
a0c1eeba SM |
19675 | error (_("DW_FORM_loclistx pointing outside of " |
19676 | ".debug_loclists offset array [in module %s]"), | |
19677 | objfile_name (objfile)); | |
19678 | ||
05787bad SM |
19679 | /* Validate that reading won't go beyond the end of the section. */ |
19680 | if (start_offset + cu->header.offset_size > section->size) | |
19681 | error (_("Reading DW_FORM_loclistx index beyond end of" | |
19682 | ".debug_loclists section [in module %s]"), | |
19683 | objfile_name (objfile)); | |
19684 | ||
19685 | const gdb_byte *info_ptr = section->buffer + start_offset; | |
41144253 | 19686 | |
19687 | if (cu->header.offset_size == 4) | |
e57933dc | 19688 | return (sect_offset) (bfd_get_32 (abfd, info_ptr) + loclist_base); |
41144253 | 19689 | else |
e57933dc | 19690 | return (sect_offset) (bfd_get_64 (abfd, info_ptr) + loclist_base); |
41144253 | 19691 | } |
19692 | ||
d0ce17d8 CT |
19693 | /* Given a DW_FORM_rnglistx value RNGLIST_INDEX, fetch the offset from the |
19694 | array of offsets in the .debug_rnglists section. */ | |
e57933dc SM |
19695 | |
19696 | static sect_offset | |
d0ce17d8 CT |
19697 | read_rnglist_index (struct dwarf2_cu *cu, ULONGEST rnglist_index, |
19698 | dwarf_tag tag) | |
19699 | { | |
19700 | struct dwarf2_per_objfile *dwarf2_per_objfile = cu->per_objfile; | |
19701 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19702 | bfd *abfd = objfile->obfd; | |
19703 | ULONGEST rnglist_header_size = | |
19704 | (cu->header.initial_length_size == 4 ? RNGLIST_HEADER_SIZE32 | |
19705 | : RNGLIST_HEADER_SIZE64); | |
2b0c7f41 SM |
19706 | |
19707 | /* When reading a DW_FORM_rnglistx from a DWO, we read from the DWO's | |
19708 | .debug_rnglists.dwo section. The rnglists base given in the skeleton | |
19709 | doesn't apply. */ | |
d0ce17d8 | 19710 | ULONGEST rnglist_base = |
2b0c7f41 | 19711 | (cu->dwo_unit != nullptr) ? rnglist_header_size : cu->rnglists_base; |
5e4d9bbc SM |
19712 | |
19713 | /* Offset in .debug_rnglists of the offset for RNGLIST_INDEX. */ | |
d0ce17d8 CT |
19714 | ULONGEST start_offset = |
19715 | rnglist_base + rnglist_index * cu->header.offset_size; | |
19716 | ||
19717 | /* Get rnglists section. */ | |
19718 | struct dwarf2_section_info *section = cu_debug_rnglists_section (cu, tag); | |
19719 | ||
19720 | /* Read the rnglists section content. */ | |
19721 | section->read (objfile); | |
19722 | if (section->buffer == nullptr) | |
19723 | error (_("DW_FORM_rnglistx used without .debug_rnglists section " | |
19724 | "[in module %s]"), | |
19725 | objfile_name (objfile)); | |
19726 | ||
a1c40103 SM |
19727 | /* DW_AT_rnglists_base points after the .debug_rnglists contribution header, |
19728 | so if rnglist_base is smaller than the header size, we have a problem. */ | |
19729 | if (rnglist_base < rnglist_header_size) | |
19730 | error (_("DW_AT_rnglists_base is smaller than header size [in module %s]"), | |
19731 | objfile_name (objfile)); | |
19732 | ||
19733 | /* Read the header of the rnglists contribution. */ | |
d0ce17d8 | 19734 | struct loclists_rnglists_header header; |
a1c40103 SM |
19735 | read_loclists_rnglists_header (&header, section, |
19736 | (sect_offset) (rnglist_base - rnglist_header_size)); | |
19737 | ||
19738 | /* Verify the rnglist index is valid. */ | |
d0ce17d8 CT |
19739 | if (rnglist_index >= header.offset_entry_count) |
19740 | error (_("DW_FORM_rnglistx index pointing outside of " | |
19741 | ".debug_rnglists offset array [in module %s]"), | |
19742 | objfile_name (objfile)); | |
19743 | ||
d0ce17d8 | 19744 | /* Validate that reading won't go beyond the end of the section. */ |
5e4d9bbc | 19745 | if (start_offset + cu->header.offset_size > section->size) |
d0ce17d8 CT |
19746 | error (_("Reading DW_FORM_rnglistx index beyond end of" |
19747 | ".debug_rnglists section [in module %s]"), | |
19748 | objfile_name (objfile)); | |
19749 | ||
19750 | const gdb_byte *info_ptr = section->buffer + start_offset; | |
19751 | ||
19752 | if (cu->header.offset_size == 4) | |
e57933dc | 19753 | return (sect_offset) (read_4_bytes (abfd, info_ptr) + rnglist_base); |
d0ce17d8 | 19754 | else |
e57933dc | 19755 | return (sect_offset) (read_8_bytes (abfd, info_ptr) + rnglist_base); |
d0ce17d8 CT |
19756 | } |
19757 | ||
18a8505e AT |
19758 | /* Process the attributes that had to be skipped in the first round. These |
19759 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
19760 | They could not have been processed in the first round, because at the time | |
19761 | the values of str_offsets_base or addr_base may not have been known. */ | |
f1749218 TT |
19762 | static void |
19763 | read_attribute_reprocess (const struct die_reader_specs *reader, | |
d0ce17d8 | 19764 | struct attribute *attr, dwarf_tag tag) |
18a8505e AT |
19765 | { |
19766 | struct dwarf2_cu *cu = reader->cu; | |
19767 | switch (attr->form) | |
19768 | { | |
19769 | case DW_FORM_addrx: | |
19770 | case DW_FORM_GNU_addr_index: | |
36d378cf TT |
19771 | attr->set_address (read_addr_index (cu, |
19772 | attr->as_unsigned_reprocess ())); | |
dda83cd7 | 19773 | break; |
41144253 | 19774 | case DW_FORM_loclistx: |
b1829e1b | 19775 | { |
e57933dc | 19776 | sect_offset loclists_sect_off |
b1829e1b SM |
19777 | = read_loclist_index (cu, attr->as_unsigned_reprocess ()); |
19778 | ||
e57933dc | 19779 | attr->set_unsigned (to_underlying (loclists_sect_off)); |
b1829e1b SM |
19780 | } |
19781 | break; | |
d0ce17d8 | 19782 | case DW_FORM_rnglistx: |
b1829e1b | 19783 | { |
e57933dc | 19784 | sect_offset rnglists_sect_off |
b1829e1b SM |
19785 | = read_rnglist_index (cu, attr->as_unsigned_reprocess (), tag); |
19786 | ||
e57933dc | 19787 | attr->set_unsigned (to_underlying (rnglists_sect_off)); |
b1829e1b | 19788 | } |
dda83cd7 | 19789 | break; |
18a8505e AT |
19790 | case DW_FORM_strx: |
19791 | case DW_FORM_strx1: | |
19792 | case DW_FORM_strx2: | |
19793 | case DW_FORM_strx3: | |
19794 | case DW_FORM_strx4: | |
19795 | case DW_FORM_GNU_str_index: | |
19796 | { | |
fe56917a | 19797 | unsigned int str_index = attr->as_unsigned_reprocess (); |
c6481205 | 19798 | gdb_assert (!attr->canonical_string_p ()); |
18a8505e | 19799 | if (reader->dwo_file != NULL) |
c6481205 TT |
19800 | attr->set_string_noncanonical (read_dwo_str_index (reader, |
19801 | str_index)); | |
18a8505e | 19802 | else |
c6481205 TT |
19803 | attr->set_string_noncanonical (read_stub_str_index (cu, |
19804 | str_index)); | |
18a8505e AT |
19805 | break; |
19806 | } | |
19807 | default: | |
19808 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
19809 | } | |
19810 | } | |
19811 | ||
a8329558 | 19812 | /* Read an attribute value described by an attribute form. */ |
c906108c | 19813 | |
d521ce57 | 19814 | static const gdb_byte * |
dee91e82 DE |
19815 | read_attribute_value (const struct die_reader_specs *reader, |
19816 | struct attribute *attr, unsigned form, | |
7a5f294d | 19817 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 19818 | { |
dee91e82 | 19819 | struct dwarf2_cu *cu = reader->cu; |
976ca316 SM |
19820 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19821 | struct objfile *objfile = per_objfile->objfile; | |
dee91e82 | 19822 | bfd *abfd = reader->abfd; |
e7c27a73 | 19823 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19824 | unsigned int bytes_read; |
19825 | struct dwarf_block *blk; | |
19826 | ||
aead7601 | 19827 | attr->form = (enum dwarf_form) form; |
a8329558 | 19828 | switch (form) |
c906108c | 19829 | { |
c906108c | 19830 | case DW_FORM_ref_addr: |
7c290a04 TT |
19831 | if (cu_header->version == 2) |
19832 | attr->set_unsigned (cu_header->read_address (abfd, info_ptr, | |
414ad644 | 19833 | &bytes_read)); |
ae411497 | 19834 | else |
7c290a04 | 19835 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19836 | &bytes_read)); |
ae411497 TT |
19837 | info_ptr += bytes_read; |
19838 | break; | |
36586728 | 19839 | case DW_FORM_GNU_ref_alt: |
7c290a04 | 19840 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19841 | &bytes_read)); |
36586728 TT |
19842 | info_ptr += bytes_read; |
19843 | break; | |
ae411497 | 19844 | case DW_FORM_addr: |
08feed99 TT |
19845 | { |
19846 | struct gdbarch *gdbarch = objfile->arch (); | |
7c290a04 | 19847 | CORE_ADDR addr = cu_header->read_address (abfd, info_ptr, &bytes_read); |
36d378cf TT |
19848 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr); |
19849 | attr->set_address (addr); | |
08feed99 TT |
19850 | info_ptr += bytes_read; |
19851 | } | |
c906108c SS |
19852 | break; |
19853 | case DW_FORM_block2: | |
7b5a2f43 | 19854 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19855 | blk->size = read_2_bytes (abfd, info_ptr); |
19856 | info_ptr += 2; | |
19857 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19858 | info_ptr += blk->size; | |
9d2246fc | 19859 | attr->set_block (blk); |
c906108c SS |
19860 | break; |
19861 | case DW_FORM_block4: | |
7b5a2f43 | 19862 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19863 | blk->size = read_4_bytes (abfd, info_ptr); |
19864 | info_ptr += 4; | |
19865 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19866 | info_ptr += blk->size; | |
9d2246fc | 19867 | attr->set_block (blk); |
c906108c SS |
19868 | break; |
19869 | case DW_FORM_data2: | |
414ad644 | 19870 | attr->set_unsigned (read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19871 | info_ptr += 2; |
19872 | break; | |
19873 | case DW_FORM_data4: | |
414ad644 | 19874 | attr->set_unsigned (read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19875 | info_ptr += 4; |
19876 | break; | |
19877 | case DW_FORM_data8: | |
414ad644 | 19878 | attr->set_unsigned (read_8_bytes (abfd, info_ptr)); |
c906108c SS |
19879 | info_ptr += 8; |
19880 | break; | |
0224619f JK |
19881 | case DW_FORM_data16: |
19882 | blk = dwarf_alloc_block (cu); | |
19883 | blk->size = 16; | |
19884 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
19885 | info_ptr += 16; | |
9d2246fc | 19886 | attr->set_block (blk); |
0224619f | 19887 | break; |
2dc7f7b3 | 19888 | case DW_FORM_sec_offset: |
7c290a04 | 19889 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19890 | &bytes_read)); |
2dc7f7b3 TT |
19891 | info_ptr += bytes_read; |
19892 | break; | |
41144253 | 19893 | case DW_FORM_loclistx: |
19894 | { | |
7a5f294d TT |
19895 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, |
19896 | &bytes_read)); | |
19897 | info_ptr += bytes_read; | |
41144253 | 19898 | } |
19899 | break; | |
c906108c | 19900 | case DW_FORM_string: |
c6481205 TT |
19901 | attr->set_string_noncanonical (read_direct_string (abfd, info_ptr, |
19902 | &bytes_read)); | |
c906108c SS |
19903 | info_ptr += bytes_read; |
19904 | break; | |
4bdf3d34 | 19905 | case DW_FORM_strp: |
36586728 TT |
19906 | if (!cu->per_cu->is_dwz) |
19907 | { | |
c6481205 TT |
19908 | attr->set_string_noncanonical |
19909 | (read_indirect_string (per_objfile, | |
19910 | abfd, info_ptr, cu_header, | |
19911 | &bytes_read)); | |
36586728 TT |
19912 | info_ptr += bytes_read; |
19913 | break; | |
19914 | } | |
19915 | /* FALLTHROUGH */ | |
43988095 JK |
19916 | case DW_FORM_line_strp: |
19917 | if (!cu->per_cu->is_dwz) | |
19918 | { | |
c6481205 TT |
19919 | attr->set_string_noncanonical |
19920 | (per_objfile->read_line_string (info_ptr, cu_header, | |
19921 | &bytes_read)); | |
43988095 JK |
19922 | info_ptr += bytes_read; |
19923 | break; | |
19924 | } | |
19925 | /* FALLTHROUGH */ | |
36586728 TT |
19926 | case DW_FORM_GNU_strp_alt: |
19927 | { | |
a7308ce0 | 19928 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd, true); |
8266302d TT |
19929 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
19930 | &bytes_read); | |
36586728 | 19931 | |
c6481205 TT |
19932 | attr->set_string_noncanonical |
19933 | (dwz->read_string (objfile, str_offset)); | |
36586728 TT |
19934 | info_ptr += bytes_read; |
19935 | } | |
4bdf3d34 | 19936 | break; |
2dc7f7b3 | 19937 | case DW_FORM_exprloc: |
c906108c | 19938 | case DW_FORM_block: |
7b5a2f43 | 19939 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19940 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19941 | info_ptr += bytes_read; | |
19942 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19943 | info_ptr += blk->size; | |
9d2246fc | 19944 | attr->set_block (blk); |
c906108c SS |
19945 | break; |
19946 | case DW_FORM_block1: | |
7b5a2f43 | 19947 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19948 | blk->size = read_1_byte (abfd, info_ptr); |
19949 | info_ptr += 1; | |
19950 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19951 | info_ptr += blk->size; | |
9d2246fc | 19952 | attr->set_block (blk); |
c906108c SS |
19953 | break; |
19954 | case DW_FORM_data1: | |
c906108c | 19955 | case DW_FORM_flag: |
414ad644 | 19956 | attr->set_unsigned (read_1_byte (abfd, info_ptr)); |
c906108c SS |
19957 | info_ptr += 1; |
19958 | break; | |
2dc7f7b3 | 19959 | case DW_FORM_flag_present: |
414ad644 | 19960 | attr->set_unsigned (1); |
2dc7f7b3 | 19961 | break; |
c906108c | 19962 | case DW_FORM_sdata: |
1bc397c5 | 19963 | attr->set_signed (read_signed_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19964 | info_ptr += bytes_read; |
19965 | break; | |
18a8505e | 19966 | case DW_FORM_rnglistx: |
7a5f294d TT |
19967 | { |
19968 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, | |
19969 | &bytes_read)); | |
19970 | info_ptr += bytes_read; | |
19971 | } | |
19972 | break; | |
d0ce17d8 | 19973 | case DW_FORM_udata: |
414ad644 | 19974 | attr->set_unsigned (read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19975 | info_ptr += bytes_read; |
19976 | break; | |
19977 | case DW_FORM_ref1: | |
7c290a04 | 19978 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19979 | + read_1_byte (abfd, info_ptr))); |
c906108c SS |
19980 | info_ptr += 1; |
19981 | break; | |
19982 | case DW_FORM_ref2: | |
7c290a04 | 19983 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19984 | + read_2_bytes (abfd, info_ptr))); |
c906108c SS |
19985 | info_ptr += 2; |
19986 | break; | |
19987 | case DW_FORM_ref4: | |
7c290a04 | 19988 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19989 | + read_4_bytes (abfd, info_ptr))); |
c906108c SS |
19990 | info_ptr += 4; |
19991 | break; | |
613e1657 | 19992 | case DW_FORM_ref8: |
7c290a04 | 19993 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19994 | + read_8_bytes (abfd, info_ptr))); |
613e1657 KB |
19995 | info_ptr += 8; |
19996 | break; | |
55f1336d | 19997 | case DW_FORM_ref_sig8: |
630ed6b9 | 19998 | attr->set_signature (read_8_bytes (abfd, info_ptr)); |
348e048f DE |
19999 | info_ptr += 8; |
20000 | break; | |
c906108c | 20001 | case DW_FORM_ref_udata: |
7c290a04 | 20002 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 TT |
20003 | + read_unsigned_leb128 (abfd, info_ptr, |
20004 | &bytes_read))); | |
c906108c SS |
20005 | info_ptr += bytes_read; |
20006 | break; | |
c906108c | 20007 | case DW_FORM_indirect: |
a8329558 KW |
20008 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
20009 | info_ptr += bytes_read; | |
43988095 JK |
20010 | if (form == DW_FORM_implicit_const) |
20011 | { | |
20012 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
20013 | info_ptr += bytes_read; | |
20014 | } | |
20015 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
7a5f294d | 20016 | info_ptr); |
43988095 JK |
20017 | break; |
20018 | case DW_FORM_implicit_const: | |
1bc397c5 | 20019 | attr->set_signed (implicit_const); |
a8329558 | 20020 | break; |
336d760d | 20021 | case DW_FORM_addrx: |
3019eac3 | 20022 | case DW_FORM_GNU_addr_index: |
fe56917a TT |
20023 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, |
20024 | &bytes_read)); | |
3019eac3 DE |
20025 | info_ptr += bytes_read; |
20026 | break; | |
cf532bd1 | 20027 | case DW_FORM_strx: |
15f18d14 AT |
20028 | case DW_FORM_strx1: |
20029 | case DW_FORM_strx2: | |
20030 | case DW_FORM_strx3: | |
20031 | case DW_FORM_strx4: | |
3019eac3 | 20032 | case DW_FORM_GNU_str_index: |
3019eac3 | 20033 | { |
15f18d14 AT |
20034 | ULONGEST str_index; |
20035 | if (form == DW_FORM_strx1) | |
20036 | { | |
20037 | str_index = read_1_byte (abfd, info_ptr); | |
20038 | info_ptr += 1; | |
20039 | } | |
20040 | else if (form == DW_FORM_strx2) | |
20041 | { | |
20042 | str_index = read_2_bytes (abfd, info_ptr); | |
20043 | info_ptr += 2; | |
20044 | } | |
20045 | else if (form == DW_FORM_strx3) | |
20046 | { | |
20047 | str_index = read_3_bytes (abfd, info_ptr); | |
20048 | info_ptr += 3; | |
20049 | } | |
20050 | else if (form == DW_FORM_strx4) | |
20051 | { | |
20052 | str_index = read_4_bytes (abfd, info_ptr); | |
20053 | info_ptr += 4; | |
20054 | } | |
20055 | else | |
20056 | { | |
20057 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
20058 | info_ptr += bytes_read; | |
20059 | } | |
fe56917a | 20060 | attr->set_unsigned_reprocess (str_index); |
7a5f294d | 20061 | } |
3019eac3 | 20062 | break; |
c906108c | 20063 | default: |
8a3fe4f8 | 20064 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
20065 | dwarf_form_name (form), |
20066 | bfd_get_filename (abfd)); | |
c906108c | 20067 | } |
28e94949 | 20068 | |
36586728 | 20069 | /* Super hack. */ |
cd6c91b4 | 20070 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
20071 | attr->form = DW_FORM_GNU_ref_alt; |
20072 | ||
28e94949 JB |
20073 | /* We have seen instances where the compiler tried to emit a byte |
20074 | size attribute of -1 which ended up being encoded as an unsigned | |
20075 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
20076 | an object of this size seems pretty unlikely so we can relatively | |
20077 | safely treat these cases as if the size attribute was invalid and | |
20078 | treat them as zero by default. */ | |
20079 | if (attr->name == DW_AT_byte_size | |
20080 | && form == DW_FORM_data4 | |
529908cb | 20081 | && attr->as_unsigned () >= 0xffffffff) |
01c66ae6 JB |
20082 | { |
20083 | complaint | |
dda83cd7 SM |
20084 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
20085 | hex_string (attr->as_unsigned ())); | |
414ad644 | 20086 | attr->set_unsigned (0); |
01c66ae6 | 20087 | } |
28e94949 | 20088 | |
c906108c SS |
20089 | return info_ptr; |
20090 | } | |
20091 | ||
a8329558 KW |
20092 | /* Read an attribute described by an abbreviated attribute. */ |
20093 | ||
d521ce57 | 20094 | static const gdb_byte * |
dee91e82 | 20095 | read_attribute (const struct die_reader_specs *reader, |
4444f407 | 20096 | struct attribute *attr, const struct attr_abbrev *abbrev, |
7a5f294d | 20097 | const gdb_byte *info_ptr) |
a8329558 KW |
20098 | { |
20099 | attr->name = abbrev->name; | |
c6481205 | 20100 | attr->string_is_canonical = 0; |
fe56917a | 20101 | attr->requires_reprocessing = 0; |
43988095 | 20102 | return read_attribute_value (reader, attr, abbrev->form, |
7a5f294d | 20103 | abbrev->implicit_const, info_ptr); |
a8329558 KW |
20104 | } |
20105 | ||
43988095 JK |
20106 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
20107 | ||
20108 | static const char * | |
976ca316 | 20109 | read_indirect_string_at_offset (dwarf2_per_objfile *per_objfile, |
4f44ae6c | 20110 | LONGEST str_offset) |
43988095 | 20111 | { |
976ca316 SM |
20112 | return per_objfile->per_bfd->str.read_string (per_objfile->objfile, |
20113 | str_offset, "DW_FORM_strp"); | |
c906108c SS |
20114 | } |
20115 | ||
43988095 JK |
20116 | /* Return pointer to string at .debug_str offset as read from BUF. |
20117 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
20118 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
20119 | ||
d521ce57 | 20120 | static const char * |
976ca316 | 20121 | read_indirect_string (dwarf2_per_objfile *per_objfile, bfd *abfd, |
ed2dc618 | 20122 | const gdb_byte *buf, |
cf2c3c16 TT |
20123 | const struct comp_unit_head *cu_header, |
20124 | unsigned int *bytes_read_ptr) | |
20125 | { | |
8266302d | 20126 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 20127 | |
976ca316 | 20128 | return read_indirect_string_at_offset (per_objfile, str_offset); |
cf2c3c16 TT |
20129 | } |
20130 | ||
86c0bb4c | 20131 | /* See read.h. */ |
43988095 | 20132 | |
86c0bb4c TT |
20133 | const char * |
20134 | dwarf2_per_objfile::read_line_string (const gdb_byte *buf, | |
5989a64e SM |
20135 | const struct comp_unit_head *cu_header, |
20136 | unsigned int *bytes_read_ptr) | |
43988095 | 20137 | { |
86c0bb4c | 20138 | bfd *abfd = objfile->obfd; |
8266302d | 20139 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 20140 | |
5989a64e | 20141 | return per_bfd->line_str.read_string (objfile, str_offset, "DW_FORM_line_strp"); |
43988095 JK |
20142 | } |
20143 | ||
3019eac3 | 20144 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 20145 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
20146 | ADDR_SIZE is the size of addresses from the CU header. */ |
20147 | ||
20148 | static CORE_ADDR | |
976ca316 SM |
20149 | read_addr_index_1 (dwarf2_per_objfile *per_objfile, unsigned int addr_index, |
20150 | gdb::optional<ULONGEST> addr_base, int addr_size) | |
3019eac3 | 20151 | { |
976ca316 | 20152 | struct objfile *objfile = per_objfile->objfile; |
3019eac3 DE |
20153 | bfd *abfd = objfile->obfd; |
20154 | const gdb_byte *info_ptr; | |
18a8505e | 20155 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 20156 | |
976ca316 SM |
20157 | per_objfile->per_bfd->addr.read (objfile); |
20158 | if (per_objfile->per_bfd->addr.buffer == NULL) | |
3019eac3 | 20159 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), |
4262abfb | 20160 | objfile_name (objfile)); |
18a8505e | 20161 | if (addr_base_or_zero + addr_index * addr_size |
976ca316 | 20162 | >= per_objfile->per_bfd->addr.size) |
3019eac3 DE |
20163 | error (_("DW_FORM_addr_index pointing outside of " |
20164 | ".debug_addr section [in module %s]"), | |
4262abfb | 20165 | objfile_name (objfile)); |
976ca316 SM |
20166 | info_ptr = (per_objfile->per_bfd->addr.buffer + addr_base_or_zero |
20167 | + addr_index * addr_size); | |
3019eac3 DE |
20168 | if (addr_size == 4) |
20169 | return bfd_get_32 (abfd, info_ptr); | |
20170 | else | |
20171 | return bfd_get_64 (abfd, info_ptr); | |
20172 | } | |
20173 | ||
20174 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
20175 | ||
20176 | static CORE_ADDR | |
20177 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
20178 | { | |
5e22e966 | 20179 | return read_addr_index_1 (cu->per_objfile, addr_index, |
518817b3 | 20180 | cu->addr_base, cu->header.addr_size); |
3019eac3 DE |
20181 | } |
20182 | ||
20183 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
20184 | ||
20185 | static CORE_ADDR | |
d521ce57 | 20186 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
20187 | unsigned int *bytes_read) |
20188 | { | |
5e22e966 | 20189 | bfd *abfd = cu->per_objfile->objfile->obfd; |
3019eac3 DE |
20190 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
20191 | ||
20192 | return read_addr_index (cu, addr_index); | |
20193 | } | |
20194 | ||
450a1bfc | 20195 | /* See read.h. */ |
3019eac3 DE |
20196 | |
20197 | CORE_ADDR | |
82ca3f51 | 20198 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, |
976ca316 | 20199 | dwarf2_per_objfile *per_objfile, |
82ca3f51 | 20200 | unsigned int addr_index) |
3019eac3 | 20201 | { |
976ca316 | 20202 | struct dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
18a8505e | 20203 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
20204 | int addr_size; |
20205 | ||
3019eac3 DE |
20206 | /* We need addr_base and addr_size. |
20207 | If we don't have PER_CU->cu, we have to get it. | |
20208 | Nasty, but the alternative is storing the needed info in PER_CU, | |
20209 | which at this point doesn't seem justified: it's not clear how frequently | |
20210 | it would get used and it would increase the size of every PER_CU. | |
20211 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
20212 | so we're not in uncharted territory here. | |
20213 | Alas we need to be a bit more complicated as addr_base is contained | |
20214 | in the DIE. | |
20215 | ||
20216 | We don't need to read the entire CU(/TU). | |
20217 | We just need the header and top level die. | |
a1b64ce1 | 20218 | |
3019eac3 | 20219 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 20220 | For now we skip this optimization. */ |
3019eac3 DE |
20221 | |
20222 | if (cu != NULL) | |
20223 | { | |
20224 | addr_base = cu->addr_base; | |
20225 | addr_size = cu->header.addr_size; | |
20226 | } | |
20227 | else | |
20228 | { | |
976ca316 | 20229 | cutu_reader reader (per_cu, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
20230 | addr_base = reader.cu->addr_base; |
20231 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
20232 | } |
20233 | ||
976ca316 | 20234 | return read_addr_index_1 (per_objfile, addr_index, addr_base, addr_size); |
3019eac3 DE |
20235 | } |
20236 | ||
18a8505e AT |
20237 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
20238 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
20239 | DWO file. */ | |
3019eac3 | 20240 | |
d521ce57 | 20241 | static const char * |
18a8505e AT |
20242 | read_str_index (struct dwarf2_cu *cu, |
20243 | struct dwarf2_section_info *str_section, | |
20244 | struct dwarf2_section_info *str_offsets_section, | |
20245 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 20246 | { |
976ca316 SM |
20247 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
20248 | struct objfile *objfile = per_objfile->objfile; | |
c5164cbc | 20249 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 20250 | bfd *abfd = objfile->obfd; |
d521ce57 | 20251 | const gdb_byte *info_ptr; |
3019eac3 | 20252 | ULONGEST str_offset; |
cf532bd1 | 20253 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 20254 | |
96b79293 TT |
20255 | str_section->read (objfile); |
20256 | str_offsets_section->read (objfile); | |
73869dc2 | 20257 | if (str_section->buffer == NULL) |
18a8505e | 20258 | error (_("%s used without %s section" |
9d8780f0 | 20259 | " in CU at offset %s [in module %s]"), |
96b79293 | 20260 | form_name, str_section->get_name (), |
dda83cd7 | 20261 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 20262 | if (str_offsets_section->buffer == NULL) |
18a8505e | 20263 | error (_("%s used without %s section" |
9d8780f0 | 20264 | " in CU at offset %s [in module %s]"), |
96b79293 | 20265 | form_name, str_section->get_name (), |
dda83cd7 | 20266 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 20267 | info_ptr = (str_offsets_section->buffer |
18a8505e | 20268 | + str_offsets_base |
3019eac3 DE |
20269 | + str_index * cu->header.offset_size); |
20270 | if (cu->header.offset_size == 4) | |
20271 | str_offset = bfd_get_32 (abfd, info_ptr); | |
20272 | else | |
20273 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 20274 | if (str_offset >= str_section->size) |
57d63ce2 | 20275 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
20276 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
20277 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20278 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
20279 | } |
20280 | ||
18a8505e AT |
20281 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
20282 | ||
20283 | static const char * | |
20284 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
20285 | { | |
20286 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
20287 | ? reader->cu->header.addr_size : 0; | |
20288 | return read_str_index (reader->cu, | |
20289 | &reader->dwo_file->sections.str, | |
20290 | &reader->dwo_file->sections.str_offsets, | |
20291 | str_offsets_base, str_index); | |
20292 | } | |
20293 | ||
20294 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
20295 | ||
20296 | static const char * | |
20297 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
20298 | { | |
5e22e966 | 20299 | struct objfile *objfile = cu->per_objfile->objfile; |
18a8505e AT |
20300 | const char *objf_name = objfile_name (objfile); |
20301 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
20302 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
20303 | ||
20304 | if (!cu->str_offsets_base.has_value ()) | |
20305 | error (_("%s used in Fission stub without %s" | |
20306 | " in CU at offset 0x%lx [in module %s]"), | |
20307 | form_name, str_offsets_attr_name, | |
20308 | (long) cu->header.offset_size, objf_name); | |
20309 | ||
20310 | return read_str_index (cu, | |
5e22e966 SM |
20311 | &cu->per_objfile->per_bfd->str, |
20312 | &cu->per_objfile->per_bfd->str_offsets, | |
18a8505e AT |
20313 | *cu->str_offsets_base, str_index); |
20314 | } | |
20315 | ||
3019eac3 DE |
20316 | /* Return the length of an LEB128 number in BUF. */ |
20317 | ||
20318 | static int | |
20319 | leb128_size (const gdb_byte *buf) | |
20320 | { | |
20321 | const gdb_byte *begin = buf; | |
20322 | gdb_byte byte; | |
20323 | ||
20324 | while (1) | |
20325 | { | |
20326 | byte = *buf++; | |
20327 | if ((byte & 128) == 0) | |
20328 | return buf - begin; | |
20329 | } | |
20330 | } | |
20331 | ||
c906108c | 20332 | static void |
e142c38c | 20333 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
20334 | { |
20335 | switch (lang) | |
20336 | { | |
20337 | case DW_LANG_C89: | |
76bee0cc | 20338 | case DW_LANG_C99: |
0cfd832f | 20339 | case DW_LANG_C11: |
c906108c | 20340 | case DW_LANG_C: |
d1be3247 | 20341 | case DW_LANG_UPC: |
e142c38c | 20342 | cu->language = language_c; |
c906108c | 20343 | break; |
9c37b5ae | 20344 | case DW_LANG_Java: |
c906108c | 20345 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
20346 | case DW_LANG_C_plus_plus_11: |
20347 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 20348 | cu->language = language_cplus; |
c906108c | 20349 | break; |
6aecb9c2 JB |
20350 | case DW_LANG_D: |
20351 | cu->language = language_d; | |
20352 | break; | |
c906108c SS |
20353 | case DW_LANG_Fortran77: |
20354 | case DW_LANG_Fortran90: | |
b21b22e0 | 20355 | case DW_LANG_Fortran95: |
f7de9aab MW |
20356 | case DW_LANG_Fortran03: |
20357 | case DW_LANG_Fortran08: | |
e142c38c | 20358 | cu->language = language_fortran; |
c906108c | 20359 | break; |
a766d390 DE |
20360 | case DW_LANG_Go: |
20361 | cu->language = language_go; | |
20362 | break; | |
c906108c | 20363 | case DW_LANG_Mips_Assembler: |
e142c38c | 20364 | cu->language = language_asm; |
c906108c SS |
20365 | break; |
20366 | case DW_LANG_Ada83: | |
8aaf0b47 | 20367 | case DW_LANG_Ada95: |
bc5f45f8 JB |
20368 | cu->language = language_ada; |
20369 | break; | |
72019c9c GM |
20370 | case DW_LANG_Modula2: |
20371 | cu->language = language_m2; | |
20372 | break; | |
fe8e67fd PM |
20373 | case DW_LANG_Pascal83: |
20374 | cu->language = language_pascal; | |
20375 | break; | |
22566fbd DJ |
20376 | case DW_LANG_ObjC: |
20377 | cu->language = language_objc; | |
20378 | break; | |
c44af4eb TT |
20379 | case DW_LANG_Rust: |
20380 | case DW_LANG_Rust_old: | |
20381 | cu->language = language_rust; | |
20382 | break; | |
c906108c SS |
20383 | case DW_LANG_Cobol74: |
20384 | case DW_LANG_Cobol85: | |
c906108c | 20385 | default: |
e142c38c | 20386 | cu->language = language_minimal; |
c906108c SS |
20387 | break; |
20388 | } | |
e142c38c | 20389 | cu->language_defn = language_def (cu->language); |
c906108c SS |
20390 | } |
20391 | ||
20392 | /* Return the named attribute or NULL if not there. */ | |
20393 | ||
20394 | static struct attribute * | |
e142c38c | 20395 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 20396 | { |
a48e046c | 20397 | for (;;) |
c906108c | 20398 | { |
a48e046c TT |
20399 | unsigned int i; |
20400 | struct attribute *spec = NULL; | |
20401 | ||
20402 | for (i = 0; i < die->num_attrs; ++i) | |
20403 | { | |
20404 | if (die->attrs[i].name == name) | |
20405 | return &die->attrs[i]; | |
20406 | if (die->attrs[i].name == DW_AT_specification | |
20407 | || die->attrs[i].name == DW_AT_abstract_origin) | |
20408 | spec = &die->attrs[i]; | |
20409 | } | |
20410 | ||
20411 | if (!spec) | |
20412 | break; | |
c906108c | 20413 | |
f2f0e013 | 20414 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 20415 | } |
c5aa993b | 20416 | |
c906108c SS |
20417 | return NULL; |
20418 | } | |
20419 | ||
7d45c7c3 KB |
20420 | /* Return the string associated with a string-typed attribute, or NULL if it |
20421 | is either not found or is of an incorrect type. */ | |
20422 | ||
20423 | static const char * | |
20424 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
20425 | { | |
20426 | struct attribute *attr; | |
20427 | const char *str = NULL; | |
20428 | ||
20429 | attr = dwarf2_attr (die, name, cu); | |
20430 | ||
20431 | if (attr != NULL) | |
20432 | { | |
95f982e5 | 20433 | str = attr->as_string (); |
e61108c9 | 20434 | if (str == nullptr) |
dda83cd7 | 20435 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
20436 | "DIE at %s in module %s"), |
20437 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
5e22e966 | 20438 | objfile_name (cu->per_objfile->objfile)); |
7d45c7c3 KB |
20439 | } |
20440 | ||
20441 | return str; | |
20442 | } | |
20443 | ||
a084a2a6 | 20444 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 20445 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
20446 | static const char * |
20447 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
20448 | { | |
20449 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
20450 | if (dwo_name == nullptr) | |
20451 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
20452 | return dwo_name; | |
20453 | } | |
20454 | ||
05cf31d1 JB |
20455 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
20456 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 20457 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
20458 | |
20459 | static int | |
20460 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
20461 | { | |
20462 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
20463 | ||
c45bc3f8 | 20464 | return attr != nullptr && attr->as_boolean (); |
05cf31d1 JB |
20465 | } |
20466 | ||
3ca72b44 | 20467 | static int |
e142c38c | 20468 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 20469 | { |
05cf31d1 JB |
20470 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
20471 | which value is non-zero. However, we have to be careful with | |
20472 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
20473 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
20474 | end up accidently finding a declaration attribute that belongs | |
20475 | to a different DIE referenced by the specification attribute, | |
20476 | even though the given DIE does not have a declaration attribute. */ | |
20477 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
20478 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
20479 | } |
20480 | ||
63d06c5c | 20481 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 20482 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
20483 | containing the return value on output. If there is no |
20484 | specification, but there is an abstract origin, that is | |
20485 | returned. */ | |
63d06c5c DC |
20486 | |
20487 | static struct die_info * | |
f2f0e013 | 20488 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 20489 | { |
f2f0e013 DJ |
20490 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
20491 | *spec_cu); | |
63d06c5c | 20492 | |
edb3359d DJ |
20493 | if (spec_attr == NULL) |
20494 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
20495 | ||
63d06c5c DC |
20496 | if (spec_attr == NULL) |
20497 | return NULL; | |
20498 | else | |
f2f0e013 | 20499 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 20500 | } |
c906108c | 20501 | |
83769d0b | 20502 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
20503 | |
20504 | static struct dwarf2_section_info * | |
20505 | get_debug_line_section (struct dwarf2_cu *cu) | |
20506 | { | |
20507 | struct dwarf2_section_info *section; | |
976ca316 | 20508 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
36586728 TT |
20509 | |
20510 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
20511 | DWO file. */ | |
20512 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
20513 | section = &cu->dwo_unit->dwo_file->sections.line; | |
20514 | else if (cu->per_cu->is_dwz) | |
20515 | { | |
a7308ce0 | 20516 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd, true); |
36586728 TT |
20517 | |
20518 | section = &dwz->line; | |
20519 | } | |
20520 | else | |
976ca316 | 20521 | section = &per_objfile->per_bfd->line; |
36586728 TT |
20522 | |
20523 | return section; | |
20524 | } | |
20525 | ||
debd256d | 20526 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20527 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20528 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20529 | Returns NULL if there is a problem reading the header, e.g., if it |
20530 | has a version we don't understand. | |
debd256d JB |
20531 | |
20532 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20533 | the returned object point into the dwarf line section buffer, |
20534 | and must not be freed. */ | |
ae2de4f8 | 20535 | |
fff8551c | 20536 | static line_header_up |
9c541725 | 20537 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20538 | { |
3019eac3 | 20539 | struct dwarf2_section_info *section; |
976ca316 | 20540 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 | 20541 | |
36586728 | 20542 | section = get_debug_line_section (cu); |
976ca316 | 20543 | section->read (per_objfile->objfile); |
3019eac3 | 20544 | if (section->buffer == NULL) |
debd256d | 20545 | { |
3019eac3 | 20546 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20547 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20548 | else |
b98664d3 | 20549 | complaint (_("missing .debug_line section")); |
debd256d JB |
20550 | return 0; |
20551 | } | |
20552 | ||
0df7ad3a | 20553 | return dwarf_decode_line_header (sect_off, cu->per_cu->is_dwz, |
976ca316 | 20554 | per_objfile, section, &cu->header); |
debd256d | 20555 | } |
c906108c | 20556 | |
c6da4cef | 20557 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 20558 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 20559 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
20560 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20561 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20562 | |
d521ce57 | 20563 | static const char * |
7ba99d21 | 20564 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 20565 | const dwarf2_psymtab *pst, |
c89b44cd TT |
20566 | const char *comp_dir, |
20567 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20568 | { |
d521ce57 TT |
20569 | const char *include_name = fe.name; |
20570 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20571 | const char *pst_filename; |
c6da4cef DE |
20572 | int file_is_pst; |
20573 | ||
8c43009f | 20574 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20575 | |
c89b44cd | 20576 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20577 | if (!IS_ABSOLUTE_PATH (include_name) |
20578 | && (dir_name != NULL || comp_dir != NULL)) | |
20579 | { | |
20580 | /* Avoid creating a duplicate psymtab for PST. | |
20581 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20582 | Before we do the comparison, however, we need to account | |
20583 | for DIR_NAME and COMP_DIR. | |
20584 | First prepend dir_name (if non-NULL). If we still don't | |
20585 | have an absolute path prepend comp_dir (if non-NULL). | |
20586 | However, the directory we record in the include-file's | |
20587 | psymtab does not contain COMP_DIR (to match the | |
20588 | corresponding symtab(s)). | |
20589 | ||
20590 | Example: | |
20591 | ||
20592 | bash$ cd /tmp | |
20593 | bash$ gcc -g ./hello.c | |
20594 | include_name = "hello.c" | |
20595 | dir_name = "." | |
20596 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20597 | DW_AT_name = "./hello.c" |
20598 | ||
20599 | */ | |
c6da4cef DE |
20600 | |
20601 | if (dir_name != NULL) | |
20602 | { | |
c89b44cd TT |
20603 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20604 | include_name, (char *) NULL)); | |
20605 | include_name = name_holder->get (); | |
c6da4cef | 20606 | include_name_to_compare = include_name; |
c6da4cef DE |
20607 | } |
20608 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20609 | { | |
c89b44cd TT |
20610 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20611 | include_name, (char *) NULL)); | |
20612 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20613 | } |
20614 | } | |
20615 | ||
20616 | pst_filename = pst->filename; | |
c89b44cd | 20617 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20618 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20619 | { | |
c89b44cd TT |
20620 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20621 | pst_filename, (char *) NULL)); | |
20622 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20623 | } |
20624 | ||
1e3fad37 | 20625 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20626 | |
c6da4cef DE |
20627 | if (file_is_pst) |
20628 | return NULL; | |
20629 | return include_name; | |
20630 | } | |
20631 | ||
d9b3de22 DE |
20632 | /* State machine to track the state of the line number program. */ |
20633 | ||
6f77053d | 20634 | class lnp_state_machine |
d9b3de22 | 20635 | { |
6f77053d PA |
20636 | public: |
20637 | /* Initialize a machine state for the start of a line number | |
20638 | program. */ | |
804d2729 TT |
20639 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20640 | bool record_lines_p); | |
6f77053d | 20641 | |
8c43009f PA |
20642 | file_entry *current_file () |
20643 | { | |
20644 | /* lh->file_names is 0-based, but the file name numbers in the | |
20645 | statement program are 1-based. */ | |
6f77053d PA |
20646 | return m_line_header->file_name_at (m_file); |
20647 | } | |
20648 | ||
20649 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20650 | we're processing the end of a sequence. */ | |
20651 | void record_line (bool end_sequence); | |
20652 | ||
a8caed5d | 20653 | /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true |
7ab6656f | 20654 | nop-out rest of the lines in this sequence. */ |
6f77053d PA |
20655 | void check_line_address (struct dwarf2_cu *cu, |
20656 | const gdb_byte *line_ptr, | |
7ab6656f | 20657 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20658 | |
20659 | void handle_set_discriminator (unsigned int discriminator) | |
20660 | { | |
20661 | m_discriminator = discriminator; | |
20662 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20663 | } | |
20664 | ||
20665 | /* Handle DW_LNE_set_address. */ | |
20666 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20667 | { | |
20668 | m_op_index = 0; | |
20669 | address += baseaddr; | |
20670 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20671 | } | |
20672 | ||
20673 | /* Handle DW_LNS_advance_pc. */ | |
20674 | void handle_advance_pc (CORE_ADDR adjust); | |
20675 | ||
20676 | /* Handle a special opcode. */ | |
20677 | void handle_special_opcode (unsigned char op_code); | |
20678 | ||
20679 | /* Handle DW_LNS_advance_line. */ | |
20680 | void handle_advance_line (int line_delta) | |
20681 | { | |
20682 | advance_line (line_delta); | |
20683 | } | |
20684 | ||
20685 | /* Handle DW_LNS_set_file. */ | |
20686 | void handle_set_file (file_name_index file); | |
20687 | ||
20688 | /* Handle DW_LNS_negate_stmt. */ | |
20689 | void handle_negate_stmt () | |
20690 | { | |
20691 | m_is_stmt = !m_is_stmt; | |
20692 | } | |
20693 | ||
20694 | /* Handle DW_LNS_const_add_pc. */ | |
20695 | void handle_const_add_pc (); | |
20696 | ||
20697 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20698 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20699 | { | |
20700 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20701 | m_op_index = 0; | |
20702 | } | |
20703 | ||
20704 | /* Handle DW_LNS_copy. */ | |
20705 | void handle_copy () | |
20706 | { | |
20707 | record_line (false); | |
20708 | m_discriminator = 0; | |
20709 | } | |
20710 | ||
20711 | /* Handle DW_LNE_end_sequence. */ | |
20712 | void handle_end_sequence () | |
20713 | { | |
804d2729 | 20714 | m_currently_recording_lines = true; |
6f77053d PA |
20715 | } |
20716 | ||
20717 | private: | |
20718 | /* Advance the line by LINE_DELTA. */ | |
20719 | void advance_line (int line_delta) | |
20720 | { | |
20721 | m_line += line_delta; | |
20722 | ||
20723 | if (line_delta != 0) | |
20724 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20725 | } |
20726 | ||
804d2729 TT |
20727 | struct dwarf2_cu *m_cu; |
20728 | ||
6f77053d PA |
20729 | gdbarch *m_gdbarch; |
20730 | ||
20731 | /* True if we're recording lines. | |
20732 | Otherwise we're building partial symtabs and are just interested in | |
20733 | finding include files mentioned by the line number program. */ | |
20734 | bool m_record_lines_p; | |
20735 | ||
8c43009f | 20736 | /* The line number header. */ |
6f77053d | 20737 | line_header *m_line_header; |
8c43009f | 20738 | |
6f77053d PA |
20739 | /* These are part of the standard DWARF line number state machine, |
20740 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20741 | |
6f77053d | 20742 | unsigned char m_op_index = 0; |
7ba99d21 AT |
20743 | /* The line table index of the current file. */ |
20744 | file_name_index m_file = 1; | |
6f77053d PA |
20745 | unsigned int m_line = 1; |
20746 | ||
20747 | /* These are initialized in the constructor. */ | |
20748 | ||
20749 | CORE_ADDR m_address; | |
20750 | bool m_is_stmt; | |
20751 | unsigned int m_discriminator; | |
d9b3de22 DE |
20752 | |
20753 | /* Additional bits of state we need to track. */ | |
20754 | ||
20755 | /* The last file that we called dwarf2_start_subfile for. | |
20756 | This is only used for TLLs. */ | |
6f77053d | 20757 | unsigned int m_last_file = 0; |
d9b3de22 | 20758 | /* The last file a line number was recorded for. */ |
6f77053d | 20759 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 20760 | |
1313c56e AB |
20761 | /* The address of the last line entry. */ |
20762 | CORE_ADDR m_last_address; | |
20763 | ||
20764 | /* Set to true when a previous line at the same address (using | |
20765 | m_last_address) had m_is_stmt true. This is reset to false when a | |
20766 | line entry at a new address (m_address different to m_last_address) is | |
20767 | processed. */ | |
20768 | bool m_stmt_at_address = false; | |
20769 | ||
804d2729 TT |
20770 | /* When true, record the lines we decode. */ |
20771 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
20772 | |
20773 | /* The last line number that was recorded, used to coalesce | |
20774 | consecutive entries for the same line. This can happen, for | |
20775 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20776 | unsigned int m_last_line = 0; |
20777 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20778 | }; |
d9b3de22 | 20779 | |
6f77053d PA |
20780 | void |
20781 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20782 | { | |
20783 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20784 | / m_line_header->maximum_ops_per_instruction) | |
20785 | * m_line_header->minimum_instruction_length); | |
20786 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20787 | m_op_index = ((m_op_index + adjust) | |
20788 | % m_line_header->maximum_ops_per_instruction); | |
20789 | } | |
d9b3de22 | 20790 | |
6f77053d PA |
20791 | void |
20792 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20793 | { |
6f77053d | 20794 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
20795 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
20796 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
20797 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
20798 | / m_line_header->maximum_ops_per_instruction) |
20799 | * m_line_header->minimum_instruction_length); | |
20800 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 20801 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 20802 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 20803 | |
258bf0ee | 20804 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
20805 | advance_line (line_delta); |
20806 | record_line (false); | |
20807 | m_discriminator = 0; | |
20808 | } | |
d9b3de22 | 20809 | |
6f77053d PA |
20810 | void |
20811 | lnp_state_machine::handle_set_file (file_name_index file) | |
20812 | { | |
20813 | m_file = file; | |
20814 | ||
20815 | const file_entry *fe = current_file (); | |
20816 | if (fe == NULL) | |
20817 | dwarf2_debug_line_missing_file_complaint (); | |
20818 | else if (m_record_lines_p) | |
20819 | { | |
20820 | const char *dir = fe->include_dir (m_line_header); | |
20821 | ||
c24bdb02 | 20822 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20823 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 20824 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
20825 | } |
20826 | } | |
20827 | ||
20828 | void | |
20829 | lnp_state_machine::handle_const_add_pc () | |
20830 | { | |
20831 | CORE_ADDR adjust | |
20832 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20833 | ||
20834 | CORE_ADDR addr_adj | |
20835 | = (((m_op_index + adjust) | |
20836 | / m_line_header->maximum_ops_per_instruction) | |
20837 | * m_line_header->minimum_instruction_length); | |
20838 | ||
20839 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20840 | m_op_index = ((m_op_index + adjust) | |
20841 | % m_line_header->maximum_ops_per_instruction); | |
20842 | } | |
d9b3de22 | 20843 | |
a05a36a5 DE |
20844 | /* Return non-zero if we should add LINE to the line number table. |
20845 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20846 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20847 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20848 | had a non-zero discriminator. | |
20849 | ||
20850 | We have to be careful in the presence of discriminators. | |
20851 | E.g., for this line: | |
20852 | ||
20853 | for (i = 0; i < 100000; i++); | |
20854 | ||
20855 | clang can emit four line number entries for that one line, | |
20856 | each with a different discriminator. | |
20857 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20858 | ||
20859 | However, we want gdb to coalesce all four entries into one. | |
20860 | Otherwise the user could stepi into the middle of the line and | |
20861 | gdb would get confused about whether the pc really was in the | |
20862 | middle of the line. | |
20863 | ||
20864 | Things are further complicated by the fact that two consecutive | |
20865 | line number entries for the same line is a heuristic used by gcc | |
20866 | to denote the end of the prologue. So we can't just discard duplicate | |
20867 | entries, we have to be selective about it. The heuristic we use is | |
20868 | that we only collapse consecutive entries for the same line if at least | |
20869 | one of those entries has a non-zero discriminator. PR 17276. | |
20870 | ||
20871 | Note: Addresses in the line number state machine can never go backwards | |
20872 | within one sequence, thus this coalescing is ok. */ | |
20873 | ||
20874 | static int | |
804d2729 TT |
20875 | dwarf_record_line_p (struct dwarf2_cu *cu, |
20876 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
20877 | int line_has_non_zero_discriminator, |
20878 | struct subfile *last_subfile) | |
20879 | { | |
c24bdb02 | 20880 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
20881 | return 1; |
20882 | if (line != last_line) | |
20883 | return 1; | |
20884 | /* Same line for the same file that we've seen already. | |
20885 | As a last check, for pr 17276, only record the line if the line | |
20886 | has never had a non-zero discriminator. */ | |
20887 | if (!line_has_non_zero_discriminator) | |
20888 | return 1; | |
20889 | return 0; | |
20890 | } | |
20891 | ||
804d2729 TT |
20892 | /* Use the CU's builder to record line number LINE beginning at |
20893 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20894 | |
20895 | static void | |
d9b3de22 | 20896 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
8c95582d | 20897 | unsigned int line, CORE_ADDR address, bool is_stmt, |
804d2729 | 20898 | struct dwarf2_cu *cu) |
252a6764 DE |
20899 | { |
20900 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20901 | ||
27e0867f DE |
20902 | if (dwarf_line_debug) |
20903 | { | |
20904 | fprintf_unfiltered (gdb_stdlog, | |
20905 | "Recording line %u, file %s, address %s\n", | |
20906 | line, lbasename (subfile->name), | |
20907 | paddress (gdbarch, address)); | |
20908 | } | |
20909 | ||
804d2729 | 20910 | if (cu != nullptr) |
8c95582d | 20911 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
252a6764 DE |
20912 | } |
20913 | ||
20914 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20915 | Mark the end of a set of line number records. | |
d9b3de22 | 20916 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20917 | If SUBFILE is NULL the request is ignored. */ |
20918 | ||
20919 | static void | |
20920 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 20921 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 20922 | { |
27e0867f DE |
20923 | if (subfile == NULL) |
20924 | return; | |
20925 | ||
20926 | if (dwarf_line_debug) | |
20927 | { | |
20928 | fprintf_unfiltered (gdb_stdlog, | |
20929 | "Finishing current line, file %s, address %s\n", | |
20930 | lbasename (subfile->name), | |
20931 | paddress (gdbarch, address)); | |
20932 | } | |
20933 | ||
8c95582d | 20934 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
d9b3de22 DE |
20935 | } |
20936 | ||
6f77053d PA |
20937 | void |
20938 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20939 | { |
d9b3de22 DE |
20940 | if (dwarf_line_debug) |
20941 | { | |
20942 | fprintf_unfiltered (gdb_stdlog, | |
20943 | "Processing actual line %u: file %u," | |
94a72be7 | 20944 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 20945 | m_line, m_file, |
6f77053d | 20946 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
20947 | m_is_stmt, m_discriminator, |
20948 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
20949 | } |
20950 | ||
6f77053d | 20951 | file_entry *fe = current_file (); |
8c43009f PA |
20952 | |
20953 | if (fe == NULL) | |
d9b3de22 DE |
20954 | dwarf2_debug_line_missing_file_complaint (); |
20955 | /* For now we ignore lines not starting on an instruction boundary. | |
20956 | But not when processing end_sequence for compatibility with the | |
20957 | previous version of the code. */ | |
6f77053d | 20958 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20959 | { |
8c43009f | 20960 | fe->included_p = 1; |
8c95582d | 20961 | if (m_record_lines_p) |
d9b3de22 | 20962 | { |
1313c56e AB |
20963 | /* When we switch files we insert an end maker in the first file, |
20964 | switch to the second file and add a new line entry. The | |
20965 | problem is that the end marker inserted in the first file will | |
20966 | discard any previous line entries at the same address. If the | |
20967 | line entries in the first file are marked as is-stmt, while | |
20968 | the new line in the second file is non-stmt, then this means | |
20969 | the end marker will discard is-stmt lines so we can have a | |
20970 | non-stmt line. This means that there are less addresses at | |
20971 | which the user can insert a breakpoint. | |
20972 | ||
20973 | To improve this we track the last address in m_last_address, | |
20974 | and whether we have seen an is-stmt at this address. Then | |
20975 | when switching files, if we have seen a stmt at the current | |
20976 | address, and we are switching to create a non-stmt line, then | |
20977 | discard the new line. */ | |
20978 | bool file_changed | |
20979 | = m_last_subfile != m_cu->get_builder ()->get_current_subfile (); | |
20980 | bool ignore_this_line | |
dda83cd7 SM |
20981 | = ((file_changed && !end_sequence && m_last_address == m_address |
20982 | && !m_is_stmt && m_stmt_at_address) | |
20983 | || (!end_sequence && m_line == 0)); | |
1313c56e AB |
20984 | |
20985 | if ((file_changed && !ignore_this_line) || end_sequence) | |
d9b3de22 | 20986 | { |
804d2729 TT |
20987 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
20988 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
20989 | } |
20990 | ||
1313c56e | 20991 | if (!end_sequence && !ignore_this_line) |
d9b3de22 | 20992 | { |
8c95582d AB |
20993 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
20994 | ||
804d2729 | 20995 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
20996 | m_line_has_non_zero_discriminator, |
20997 | m_last_subfile)) | |
d9b3de22 | 20998 | { |
c24bdb02 | 20999 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 21000 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 21001 | builder->get_current_subfile (), |
8c95582d | 21002 | m_line, m_address, is_stmt, |
804d2729 | 21003 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 21004 | } |
c24bdb02 | 21005 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 21006 | m_last_line = m_line; |
d9b3de22 DE |
21007 | } |
21008 | } | |
21009 | } | |
1313c56e AB |
21010 | |
21011 | /* Track whether we have seen any m_is_stmt true at m_address in case we | |
21012 | have multiple line table entries all at m_address. */ | |
21013 | if (m_last_address != m_address) | |
21014 | { | |
21015 | m_stmt_at_address = false; | |
21016 | m_last_address = m_address; | |
21017 | } | |
21018 | m_stmt_at_address |= m_is_stmt; | |
d9b3de22 DE |
21019 | } |
21020 | ||
804d2729 TT |
21021 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
21022 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 21023 | { |
804d2729 | 21024 | m_cu = cu; |
6f77053d PA |
21025 | m_gdbarch = arch; |
21026 | m_record_lines_p = record_lines_p; | |
21027 | m_line_header = lh; | |
d9b3de22 | 21028 | |
804d2729 | 21029 | m_currently_recording_lines = true; |
d9b3de22 | 21030 | |
d9b3de22 DE |
21031 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
21032 | was a line entry for it so that the backend has a chance to adjust it | |
21033 | and also record it in case it needs it. This is currently used by MIPS | |
21034 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
21035 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
21036 | m_is_stmt = lh->default_is_stmt; | |
21037 | m_discriminator = 0; | |
1313c56e AB |
21038 | |
21039 | m_last_address = m_address; | |
21040 | m_stmt_at_address = false; | |
252a6764 DE |
21041 | } |
21042 | ||
6f77053d PA |
21043 | void |
21044 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
21045 | const gdb_byte *line_ptr, | |
7ab6656f | 21046 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 21047 | { |
a8caed5d FS |
21048 | /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or |
21049 | -1. If ADDRESS is 0, ignoring the opcode will err if the text section is | |
21050 | located at 0x0. In this case, additionally check that if | |
21051 | ADDRESS < UNRELOCATED_LOWPC. */ | |
924c2928 | 21052 | |
a8caed5d FS |
21053 | if ((address == 0 && address < unrelocated_lowpc) |
21054 | || address == (CORE_ADDR) -1) | |
924c2928 DE |
21055 | { |
21056 | /* This line table is for a function which has been | |
21057 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
21058 | ||
5e22e966 | 21059 | struct objfile *objfile = cu->per_objfile->objfile; |
924c2928 DE |
21060 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
21061 | ||
b98664d3 | 21062 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 21063 | line_offset, objfile_name (objfile)); |
804d2729 TT |
21064 | m_currently_recording_lines = false; |
21065 | /* Note: m_currently_recording_lines is left as false until we see | |
21066 | DW_LNE_end_sequence. */ | |
924c2928 DE |
21067 | } |
21068 | } | |
21069 | ||
f3f5162e | 21070 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
21071 | Process the line number information in LH. |
21072 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
21073 | program in order to set included_p for every referenced header. */ | |
debd256d | 21074 | |
c906108c | 21075 | static void |
43f3e411 DE |
21076 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
21077 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 21078 | { |
d521ce57 TT |
21079 | const gdb_byte *line_ptr, *extended_end; |
21080 | const gdb_byte *line_end; | |
a8c50c1f | 21081 | unsigned int bytes_read, extended_len; |
699ca60a | 21082 | unsigned char op_code, extended_op; |
e142c38c | 21083 | CORE_ADDR baseaddr; |
5e22e966 | 21084 | struct objfile *objfile = cu->per_objfile->objfile; |
f3f5162e | 21085 | bfd *abfd = objfile->obfd; |
08feed99 | 21086 | struct gdbarch *gdbarch = objfile->arch (); |
6f77053d PA |
21087 | /* True if we're recording line info (as opposed to building partial |
21088 | symtabs and just interested in finding include files mentioned by | |
21089 | the line number program). */ | |
21090 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 21091 | |
b3b3bada | 21092 | baseaddr = objfile->text_section_offset (); |
c906108c | 21093 | |
debd256d JB |
21094 | line_ptr = lh->statement_program_start; |
21095 | line_end = lh->statement_program_end; | |
c906108c SS |
21096 | |
21097 | /* Read the statement sequences until there's nothing left. */ | |
21098 | while (line_ptr < line_end) | |
21099 | { | |
6f77053d PA |
21100 | /* The DWARF line number program state machine. Reset the state |
21101 | machine at the start of each sequence. */ | |
804d2729 | 21102 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 21103 | bool end_sequence = false; |
d9b3de22 | 21104 | |
8c43009f | 21105 | if (record_lines_p) |
c906108c | 21106 | { |
8c43009f PA |
21107 | /* Start a subfile for the current file of the state |
21108 | machine. */ | |
21109 | const file_entry *fe = state_machine.current_file (); | |
21110 | ||
21111 | if (fe != NULL) | |
804d2729 | 21112 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
21113 | } |
21114 | ||
a738430d | 21115 | /* Decode the table. */ |
d9b3de22 | 21116 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
21117 | { |
21118 | op_code = read_1_byte (abfd, line_ptr); | |
21119 | line_ptr += 1; | |
9aa1fe7e | 21120 | |
debd256d | 21121 | if (op_code >= lh->opcode_base) |
6e70227d | 21122 | { |
8e07a239 | 21123 | /* Special opcode. */ |
6f77053d | 21124 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
21125 | } |
21126 | else switch (op_code) | |
c906108c SS |
21127 | { |
21128 | case DW_LNS_extended_op: | |
3e43a32a MS |
21129 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
21130 | &bytes_read); | |
473b7be6 | 21131 | line_ptr += bytes_read; |
a8c50c1f | 21132 | extended_end = line_ptr + extended_len; |
c906108c SS |
21133 | extended_op = read_1_byte (abfd, line_ptr); |
21134 | line_ptr += 1; | |
8f34b746 TV |
21135 | if (DW_LNE_lo_user <= extended_op |
21136 | && extended_op <= DW_LNE_hi_user) | |
21137 | { | |
21138 | /* Vendor extension, ignore. */ | |
21139 | line_ptr = extended_end; | |
21140 | break; | |
21141 | } | |
c906108c SS |
21142 | switch (extended_op) |
21143 | { | |
21144 | case DW_LNE_end_sequence: | |
6f77053d PA |
21145 | state_machine.handle_end_sequence (); |
21146 | end_sequence = true; | |
c906108c SS |
21147 | break; |
21148 | case DW_LNE_set_address: | |
d9b3de22 DE |
21149 | { |
21150 | CORE_ADDR address | |
c8a7a66f | 21151 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 21152 | line_ptr += bytes_read; |
6f77053d PA |
21153 | |
21154 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 21155 | lowpc - baseaddr, address); |
6f77053d | 21156 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 21157 | } |
c906108c SS |
21158 | break; |
21159 | case DW_LNE_define_file: | |
dda83cd7 SM |
21160 | { |
21161 | const char *cur_file; | |
ecfb656c PA |
21162 | unsigned int mod_time, length; |
21163 | dir_index dindex; | |
6e70227d | 21164 | |
dda83cd7 | 21165 | cur_file = read_direct_string (abfd, line_ptr, |
3e43a32a | 21166 | &bytes_read); |
dda83cd7 SM |
21167 | line_ptr += bytes_read; |
21168 | dindex = (dir_index) | |
21169 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21170 | line_ptr += bytes_read; | |
21171 | mod_time = | |
21172 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21173 | line_ptr += bytes_read; | |
21174 | length = | |
21175 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21176 | line_ptr += bytes_read; | |
21177 | lh->add_file_name (cur_file, dindex, mod_time, length); | |
21178 | } | |
c906108c | 21179 | break; |
d0c6ba3d | 21180 | case DW_LNE_set_discriminator: |
6f77053d PA |
21181 | { |
21182 | /* The discriminator is not interesting to the | |
21183 | debugger; just ignore it. We still need to | |
21184 | check its value though: | |
21185 | if there are consecutive entries for the same | |
21186 | (non-prologue) line we want to coalesce them. | |
21187 | PR 17276. */ | |
21188 | unsigned int discr | |
21189 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21190 | line_ptr += bytes_read; | |
21191 | ||
21192 | state_machine.handle_set_discriminator (discr); | |
21193 | } | |
d0c6ba3d | 21194 | break; |
c906108c | 21195 | default: |
b98664d3 | 21196 | complaint (_("mangled .debug_line section")); |
debd256d | 21197 | return; |
c906108c | 21198 | } |
a8c50c1f DJ |
21199 | /* Make sure that we parsed the extended op correctly. If e.g. |
21200 | we expected a different address size than the producer used, | |
21201 | we may have read the wrong number of bytes. */ | |
21202 | if (line_ptr != extended_end) | |
21203 | { | |
b98664d3 | 21204 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
21205 | return; |
21206 | } | |
c906108c SS |
21207 | break; |
21208 | case DW_LNS_copy: | |
6f77053d | 21209 | state_machine.handle_copy (); |
c906108c SS |
21210 | break; |
21211 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
21212 | { |
21213 | CORE_ADDR adjust | |
21214 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 21215 | line_ptr += bytes_read; |
6f77053d PA |
21216 | |
21217 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 21218 | } |
c906108c SS |
21219 | break; |
21220 | case DW_LNS_advance_line: | |
a05a36a5 DE |
21221 | { |
21222 | int line_delta | |
21223 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 21224 | line_ptr += bytes_read; |
6f77053d PA |
21225 | |
21226 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 21227 | } |
c906108c SS |
21228 | break; |
21229 | case DW_LNS_set_file: | |
d9b3de22 | 21230 | { |
6f77053d | 21231 | file_name_index file |
ecfb656c PA |
21232 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
21233 | &bytes_read); | |
d9b3de22 | 21234 | line_ptr += bytes_read; |
8c43009f | 21235 | |
6f77053d | 21236 | state_machine.handle_set_file (file); |
d9b3de22 | 21237 | } |
c906108c SS |
21238 | break; |
21239 | case DW_LNS_set_column: | |
0ad93d4f | 21240 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
21241 | line_ptr += bytes_read; |
21242 | break; | |
21243 | case DW_LNS_negate_stmt: | |
6f77053d | 21244 | state_machine.handle_negate_stmt (); |
c906108c SS |
21245 | break; |
21246 | case DW_LNS_set_basic_block: | |
c906108c | 21247 | break; |
c2c6d25f JM |
21248 | /* Add to the address register of the state machine the |
21249 | address increment value corresponding to special opcode | |
a738430d MK |
21250 | 255. I.e., this value is scaled by the minimum |
21251 | instruction length since special opcode 255 would have | |
b021a221 | 21252 | scaled the increment. */ |
c906108c | 21253 | case DW_LNS_const_add_pc: |
6f77053d | 21254 | state_machine.handle_const_add_pc (); |
c906108c SS |
21255 | break; |
21256 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 21257 | { |
6f77053d | 21258 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 21259 | line_ptr += 2; |
6f77053d PA |
21260 | |
21261 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 21262 | } |
c906108c | 21263 | break; |
9aa1fe7e | 21264 | default: |
a738430d MK |
21265 | { |
21266 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 21267 | int i; |
a738430d | 21268 | |
debd256d | 21269 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
21270 | { |
21271 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21272 | line_ptr += bytes_read; | |
21273 | } | |
21274 | } | |
c906108c SS |
21275 | } |
21276 | } | |
d9b3de22 DE |
21277 | |
21278 | if (!end_sequence) | |
21279 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
21280 | ||
21281 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
21282 | in which case we still finish recording the last line). */ | |
6f77053d | 21283 | state_machine.record_line (true); |
c906108c | 21284 | } |
f3f5162e DE |
21285 | } |
21286 | ||
21287 | /* Decode the Line Number Program (LNP) for the given line_header | |
21288 | structure and CU. The actual information extracted and the type | |
21289 | of structures created from the LNP depends on the value of PST. | |
21290 | ||
21291 | 1. If PST is NULL, then this procedure uses the data from the program | |
21292 | to create all necessary symbol tables, and their linetables. | |
21293 | ||
21294 | 2. If PST is not NULL, this procedure reads the program to determine | |
21295 | the list of files included by the unit represented by PST, and | |
21296 | builds all the associated partial symbol tables. | |
21297 | ||
21298 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
21299 | It is used for relative paths in the line table. | |
21300 | NOTE: When processing partial symtabs (pst != NULL), | |
21301 | comp_dir == pst->dirname. | |
21302 | ||
21303 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
21304 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
21305 | symtab we don't use it in the name of the psymtabs we create. | |
21306 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
21307 | A good testcase for this is mb-inline.exp. |
21308 | ||
527f3840 JK |
21309 | LOWPC is the lowest address in CU (or 0 if not known). |
21310 | ||
21311 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
21312 | for its PC<->lines mapping information. Otherwise only the filename | |
21313 | table is read in. */ | |
f3f5162e DE |
21314 | |
21315 | static void | |
21316 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 21317 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 21318 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 21319 | { |
5e22e966 | 21320 | struct objfile *objfile = cu->per_objfile->objfile; |
f3f5162e | 21321 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 21322 | |
527f3840 JK |
21323 | if (decode_mapping) |
21324 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
21325 | |
21326 | if (decode_for_pst_p) | |
21327 | { | |
aaa75496 | 21328 | /* Now that we're done scanning the Line Header Program, we can |
dda83cd7 | 21329 | create the psymtab of each included file. */ |
7ba99d21 | 21330 | for (auto &file_entry : lh->file_names ()) |
dda83cd7 SM |
21331 | if (file_entry.included_p == 1) |
21332 | { | |
c89b44cd | 21333 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 21334 | const char *include_name = |
7ba99d21 AT |
21335 | psymtab_include_file_name (lh, file_entry, pst, |
21336 | comp_dir, &name_holder); | |
c6da4cef | 21337 | if (include_name != NULL) |
7b249e47 TT |
21338 | dwarf2_create_include_psymtab |
21339 | (cu->per_objfile->per_bfd, include_name, pst, | |
21340 | cu->per_objfile->per_bfd->partial_symtabs.get (), | |
0072c873 | 21341 | objfile->per_bfd); |
dda83cd7 | 21342 | } |
aaa75496 | 21343 | } |
cb1df416 DJ |
21344 | else |
21345 | { | |
21346 | /* Make sure a symtab is created for every file, even files | |
21347 | which contain only variables (i.e. no code with associated | |
21348 | line numbers). */ | |
c24bdb02 KS |
21349 | buildsym_compunit *builder = cu->get_builder (); |
21350 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 21351 | |
7ba99d21 | 21352 | for (auto &fe : lh->file_names ()) |
cb1df416 | 21353 | { |
804d2729 | 21354 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 21355 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 21356 | { |
c24bdb02 | 21357 | builder->get_current_subfile ()->symtab |
804d2729 | 21358 | = allocate_symtab (cust, |
c24bdb02 | 21359 | builder->get_current_subfile ()->name); |
43f3e411 | 21360 | } |
c24bdb02 | 21361 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
21362 | } |
21363 | } | |
c906108c SS |
21364 | } |
21365 | ||
21366 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21367 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21368 | or NULL if not known. |
c906108c SS |
21369 | This routine tries to keep line numbers from identical absolute and |
21370 | relative file names in a common subfile. | |
21371 | ||
21372 | Using the `list' example from the GDB testsuite, which resides in | |
21373 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21374 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21375 | ||
c5aa993b | 21376 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21377 | DW_AT_comp_dir: /compdir |
357e46e7 | 21378 | files.files[0].name: list0.h |
c5aa993b | 21379 | files.files[0].dir: /srcdir |
357e46e7 | 21380 | files.files[1].name: list0.c |
c5aa993b | 21381 | files.files[1].dir: /srcdir |
c906108c SS |
21382 | |
21383 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21384 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21385 | start_subfile will ensure that this happens provided that we pass the | |
21386 | concatenation of files.files[1].dir and files.files[1].name as the | |
21387 | subfile's name. */ | |
c906108c SS |
21388 | |
21389 | static void | |
804d2729 TT |
21390 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21391 | const char *dirname) | |
c906108c | 21392 | { |
43816ebc | 21393 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 21394 | |
4d663531 | 21395 | /* In order not to lose the line information directory, |
4f1520fb FR |
21396 | we concatenate it to the filename when it makes sense. |
21397 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21398 | information): ``The directory index is ignored for file names | |
21399 | that represent full path names''. Thus ignoring dirname in the | |
21400 | `else' branch below isn't an issue. */ | |
c906108c | 21401 | |
d5166ae1 | 21402 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 21403 | { |
43816ebc TT |
21404 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
21405 | filename = copy.get (); | |
d521ce57 | 21406 | } |
c906108c | 21407 | |
c24bdb02 | 21408 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
21409 | } |
21410 | ||
4c2df51b DJ |
21411 | static void |
21412 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21413 | struct dwarf2_cu *cu) |
4c2df51b | 21414 | { |
5e22e966 | 21415 | struct objfile *objfile = cu->per_objfile->objfile; |
e7c27a73 DJ |
21416 | struct comp_unit_head *cu_header = &cu->header; |
21417 | ||
4c2df51b DJ |
21418 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21419 | code here to turn a symbol with DW_AT_external and a | |
21420 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21421 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21422 | with some versions of binutils) where shared libraries could have | |
21423 | relocations against symbols in their debug information - the | |
21424 | minimal symbol would have the right address, but the debug info | |
21425 | would not. It's no longer necessary, because we will explicitly | |
21426 | apply relocations when we read in the debug information now. */ | |
21427 | ||
21428 | /* A DW_AT_location attribute with no contents indicates that a | |
21429 | variable has been optimized away. */ | |
9d2246fc | 21430 | if (attr->form_is_block () && attr->as_block ()->size == 0) |
4c2df51b | 21431 | { |
f1e6e072 | 21432 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21433 | return; |
21434 | } | |
21435 | ||
21436 | /* Handle one degenerate form of location expression specially, to | |
21437 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
21438 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
21439 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 21440 | |
9d2246fc TT |
21441 | if (attr->form_is_block ()) |
21442 | { | |
21443 | struct dwarf_block *block = attr->as_block (); | |
21444 | ||
21445 | if ((block->data[0] == DW_OP_addr | |
21446 | && block->size == 1 + cu_header->addr_size) | |
21447 | || ((block->data[0] == DW_OP_GNU_addr_index | |
dda83cd7 | 21448 | || block->data[0] == DW_OP_addrx) |
9d2246fc TT |
21449 | && (block->size |
21450 | == 1 + leb128_size (&block->data[1])))) | |
21451 | { | |
21452 | unsigned int dummy; | |
21453 | ||
21454 | if (block->data[0] == DW_OP_addr) | |
21455 | SET_SYMBOL_VALUE_ADDRESS | |
21456 | (sym, cu->header.read_address (objfile->obfd, | |
21457 | block->data + 1, | |
38583298 | 21458 | &dummy)); |
9d2246fc TT |
21459 | else |
21460 | SET_SYMBOL_VALUE_ADDRESS | |
21461 | (sym, read_addr_index_from_leb128 (cu, block->data + 1, | |
21462 | &dummy)); | |
21463 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; | |
21464 | fixup_symbol_section (sym, objfile); | |
21465 | SET_SYMBOL_VALUE_ADDRESS | |
21466 | (sym, | |
21467 | SYMBOL_VALUE_ADDRESS (sym) | |
a52d653e | 21468 | + objfile->section_offsets[sym->section_index ()]); |
9d2246fc TT |
21469 | return; |
21470 | } | |
4c2df51b DJ |
21471 | } |
21472 | ||
21473 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21474 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21475 | (i.e. when the value of a register or memory location is | |
21476 | referenced, or a thread-local block, etc.). Then again, it might | |
21477 | not be worthwhile. I'm assuming that it isn't unless performance | |
21478 | or memory numbers show me otherwise. */ | |
21479 | ||
f1e6e072 | 21480 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21481 | |
f1e6e072 | 21482 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 21483 | cu->has_loclist = true; |
4c2df51b DJ |
21484 | } |
21485 | ||
c906108c SS |
21486 | /* Given a pointer to a DWARF information entry, figure out if we need |
21487 | to make a symbol table entry for it, and if so, create a new entry | |
21488 | and return a pointer to it. | |
21489 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21490 | used the passed type. |
21491 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21492 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21493 | |
21494 | static struct symbol * | |
5e2db402 TT |
21495 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21496 | struct symbol *space) | |
c906108c | 21497 | { |
976ca316 SM |
21498 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
21499 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 21500 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 21501 | struct symbol *sym = NULL; |
15d034d0 | 21502 | const char *name; |
c906108c SS |
21503 | struct attribute *attr = NULL; |
21504 | struct attribute *attr2 = NULL; | |
e142c38c | 21505 | CORE_ADDR baseaddr; |
e37fd15a SW |
21506 | struct pending **list_to_add = NULL; |
21507 | ||
edb3359d | 21508 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 21509 | |
b3b3bada | 21510 | baseaddr = objfile->text_section_offset (); |
c906108c | 21511 | |
94af9270 | 21512 | name = dwarf2_name (die, cu); |
c906108c SS |
21513 | if (name) |
21514 | { | |
34eaf542 | 21515 | int suppress_add = 0; |
94af9270 | 21516 | |
34eaf542 TT |
21517 | if (space) |
21518 | sym = space; | |
21519 | else | |
8c14c3a3 | 21520 | sym = new (&objfile->objfile_obstack) symbol; |
c906108c | 21521 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21522 | |
21523 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 21524 | sym->set_language (cu->language, &objfile->objfile_obstack); |
f55ee35c JK |
21525 | /* Fortran does not have mangling standard and the mangling does differ |
21526 | between gfortran, iFort etc. */ | |
bcfe6157 TT |
21527 | const char *physname |
21528 | = (cu->language == language_fortran | |
21529 | ? dwarf2_full_name (name, die, cu) | |
21530 | : dwarf2_physname (name, die, cu)); | |
21531 | const char *linkagename = dw2_linkage_name (die, cu); | |
21532 | ||
21533 | if (linkagename == nullptr || cu->language == language_ada) | |
21534 | sym->set_linkage_name (physname); | |
21535 | else | |
21536 | { | |
21537 | sym->set_demangled_name (physname, &objfile->objfile_obstack); | |
21538 | sym->set_linkage_name (linkagename); | |
21539 | } | |
f55ee35c | 21540 | |
c906108c | 21541 | /* Default assumptions. |
dda83cd7 | 21542 | Use the passed type or decode it from the die. */ |
176620f1 | 21543 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21544 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21545 | if (type != NULL) |
21546 | SYMBOL_TYPE (sym) = type; | |
21547 | else | |
e7c27a73 | 21548 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21549 | attr = dwarf2_attr (die, |
21550 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21551 | cu); | |
435d3d88 | 21552 | if (attr != nullptr) |
529908cb | 21553 | SYMBOL_LINE (sym) = attr->constant_value (0); |
cb1df416 | 21554 | |
edb3359d DJ |
21555 | attr = dwarf2_attr (die, |
21556 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21557 | cu); | |
aa659cfa | 21558 | if (attr != nullptr && attr->is_nonnegative ()) |
cb1df416 | 21559 | { |
529908cb | 21560 | file_name_index file_index |
aa659cfa | 21561 | = (file_name_index) attr->as_nonnegative (); |
8c43009f | 21562 | struct file_entry *fe; |
9a619af0 | 21563 | |
ecfb656c PA |
21564 | if (cu->line_header != NULL) |
21565 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21566 | else |
21567 | fe = NULL; | |
21568 | ||
21569 | if (fe == NULL) | |
b98664d3 | 21570 | complaint (_("file index out of range")); |
8c43009f PA |
21571 | else |
21572 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21573 | } |
21574 | ||
c906108c SS |
21575 | switch (die->tag) |
21576 | { | |
21577 | case DW_TAG_label: | |
e142c38c | 21578 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 21579 | if (attr != nullptr) |
3e29f34a MR |
21580 | { |
21581 | CORE_ADDR addr; | |
21582 | ||
95f982e5 | 21583 | addr = attr->as_address (); |
3e29f34a | 21584 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 21585 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
8f5c6526 | 21586 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
3e29f34a | 21587 | } |
8f5c6526 TV |
21588 | else |
21589 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; | |
0f5238ed TT |
21590 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21591 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
d3cb6808 | 21592 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21593 | break; |
21594 | case DW_TAG_subprogram: | |
21595 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21596 | finish_block. */ | |
f1e6e072 | 21597 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21598 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c45bc3f8 | 21599 | if ((attr2 != nullptr && attr2->as_boolean ()) |
0a4b0913 AB |
21600 | || cu->language == language_ada |
21601 | || cu->language == language_fortran) | |
c906108c | 21602 | { |
dda83cd7 SM |
21603 | /* Subprograms marked external are stored as a global symbol. |
21604 | Ada and Fortran subprograms, whether marked external or | |
21605 | not, are always stored as a global symbol, because we want | |
21606 | to be able to access them globally. For instance, we want | |
21607 | to be able to break on a nested subprogram without having | |
21608 | to specify the context. */ | |
c24bdb02 | 21609 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
21610 | } |
21611 | else | |
21612 | { | |
e37fd15a | 21613 | list_to_add = cu->list_in_scope; |
c906108c SS |
21614 | } |
21615 | break; | |
edb3359d DJ |
21616 | case DW_TAG_inlined_subroutine: |
21617 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21618 | finish_block. */ | |
f1e6e072 | 21619 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21620 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21621 | list_to_add = cu->list_in_scope; |
edb3359d | 21622 | break; |
34eaf542 TT |
21623 | case DW_TAG_template_value_param: |
21624 | suppress_add = 1; | |
21625 | /* Fall through. */ | |
72929c62 | 21626 | case DW_TAG_constant: |
c906108c | 21627 | case DW_TAG_variable: |
254e6b9e | 21628 | case DW_TAG_member: |
0963b4bd MS |
21629 | /* Compilation with minimal debug info may result in |
21630 | variables with missing type entries. Change the | |
21631 | misleading `void' type to something sensible. */ | |
78134374 | 21632 | if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID) |
46a4882b | 21633 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21634 | |
e142c38c | 21635 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21636 | /* In the case of DW_TAG_member, we should only be called for |
21637 | static const members. */ | |
21638 | if (die->tag == DW_TAG_member) | |
21639 | { | |
3863f96c DE |
21640 | /* dwarf2_add_field uses die_is_declaration, |
21641 | so we do the same. */ | |
254e6b9e DE |
21642 | gdb_assert (die_is_declaration (die, cu)); |
21643 | gdb_assert (attr); | |
21644 | } | |
435d3d88 | 21645 | if (attr != nullptr) |
c906108c | 21646 | { |
e7c27a73 | 21647 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21648 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21649 | if (!suppress_add) |
34eaf542 | 21650 | { |
c45bc3f8 | 21651 | if (attr2 != nullptr && attr2->as_boolean ()) |
c24bdb02 | 21652 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 21653 | else |
e37fd15a | 21654 | list_to_add = cu->list_in_scope; |
34eaf542 | 21655 | } |
c906108c SS |
21656 | break; |
21657 | } | |
e142c38c | 21658 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 21659 | if (attr != nullptr) |
c906108c | 21660 | { |
e7c27a73 | 21661 | var_decode_location (attr, sym, cu); |
e142c38c | 21662 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21663 | |
21664 | /* Fortran explicitly imports any global symbols to the local | |
21665 | scope by DW_TAG_common_block. */ | |
21666 | if (cu->language == language_fortran && die->parent | |
21667 | && die->parent->tag == DW_TAG_common_block) | |
21668 | attr2 = NULL; | |
21669 | ||
caac4577 JG |
21670 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21671 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
976ca316 | 21672 | && !per_objfile->per_bfd->has_section_at_zero) |
caac4577 JG |
21673 | { |
21674 | /* When a static variable is eliminated by the linker, | |
21675 | the corresponding debug information is not stripped | |
21676 | out, but the variable address is set to null; | |
21677 | do not add such variables into symbol table. */ | |
21678 | } | |
c45bc3f8 | 21679 | else if (attr2 != nullptr && attr2->as_boolean ()) |
1c809c68 | 21680 | { |
4b610737 TT |
21681 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21682 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
976ca316 | 21683 | && per_objfile->per_bfd->can_copy) |
4b610737 TT |
21684 | { |
21685 | /* A global static variable might be subject to | |
21686 | copy relocation. We first check for a local | |
21687 | minsym, though, because maybe the symbol was | |
21688 | marked hidden, in which case this would not | |
21689 | apply. */ | |
21690 | bound_minimal_symbol found | |
21691 | = (lookup_minimal_symbol_linkage | |
987012b8 | 21692 | (sym->linkage_name (), objfile)); |
4b610737 TT |
21693 | if (found.minsym != nullptr) |
21694 | sym->maybe_copied = 1; | |
21695 | } | |
f55ee35c | 21696 | |
1c809c68 TT |
21697 | /* A variable with DW_AT_external is never static, |
21698 | but it may be block-scoped. */ | |
804d2729 | 21699 | list_to_add |
c24bdb02 KS |
21700 | = ((cu->list_in_scope |
21701 | == cu->get_builder ()->get_file_symbols ()) | |
21702 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21703 | : cu->list_in_scope); |
1c809c68 | 21704 | } |
c906108c | 21705 | else |
e37fd15a | 21706 | list_to_add = cu->list_in_scope; |
c906108c SS |
21707 | } |
21708 | else | |
21709 | { | |
21710 | /* We do not know the address of this symbol. | |
dda83cd7 SM |
21711 | If it is an external symbol and we have type information |
21712 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21713 | The address of the variable will then be determined from | |
21714 | the minimal symbol table whenever the variable is | |
21715 | referenced. */ | |
e142c38c | 21716 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21717 | |
21718 | /* Fortran explicitly imports any global symbols to the local | |
21719 | scope by DW_TAG_common_block. */ | |
21720 | if (cu->language == language_fortran && die->parent | |
21721 | && die->parent->tag == DW_TAG_common_block) | |
21722 | { | |
21723 | /* SYMBOL_CLASS doesn't matter here because | |
21724 | read_common_block is going to reset it. */ | |
21725 | if (!suppress_add) | |
21726 | list_to_add = cu->list_in_scope; | |
21727 | } | |
c45bc3f8 | 21728 | else if (attr2 != nullptr && attr2->as_boolean () |
0971de02 | 21729 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
c906108c | 21730 | { |
0fe7935b DJ |
21731 | /* A variable with DW_AT_external is never static, but it |
21732 | may be block-scoped. */ | |
804d2729 | 21733 | list_to_add |
c24bdb02 KS |
21734 | = ((cu->list_in_scope |
21735 | == cu->get_builder ()->get_file_symbols ()) | |
21736 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21737 | : cu->list_in_scope); |
0fe7935b | 21738 | |
f1e6e072 | 21739 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21740 | } |
442ddf59 JK |
21741 | else if (!die_is_declaration (die, cu)) |
21742 | { | |
21743 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21744 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21745 | if (!suppress_add) |
21746 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21747 | } |
c906108c SS |
21748 | } |
21749 | break; | |
21750 | case DW_TAG_formal_parameter: | |
a60f3166 | 21751 | { |
3db19b2d TV |
21752 | /* If we are inside a function, mark this as an argument. If |
21753 | not, we might be looking at an argument to an inlined function | |
21754 | when we do not have enough information to show inlined frames; | |
21755 | pretend it's a local variable in that case so that the user can | |
21756 | still see it. */ | |
21757 | struct context_stack *curr | |
21758 | = cu->get_builder ()->get_current_context_stack (); | |
21759 | if (curr != nullptr && curr->name != nullptr) | |
21760 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
a60f3166 | 21761 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 21762 | if (attr != nullptr) |
a60f3166 TT |
21763 | { |
21764 | var_decode_location (attr, sym, cu); | |
21765 | } | |
21766 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 21767 | if (attr != nullptr) |
a60f3166 TT |
21768 | { |
21769 | dwarf2_const_value (attr, sym, cu); | |
21770 | } | |
f346a30d | 21771 | |
a60f3166 TT |
21772 | list_to_add = cu->list_in_scope; |
21773 | } | |
c906108c SS |
21774 | break; |
21775 | case DW_TAG_unspecified_parameters: | |
21776 | /* From varargs functions; gdb doesn't seem to have any | |
21777 | interest in this information, so just ignore it for now. | |
21778 | (FIXME?) */ | |
21779 | break; | |
34eaf542 TT |
21780 | case DW_TAG_template_type_param: |
21781 | suppress_add = 1; | |
21782 | /* Fall through. */ | |
c906108c | 21783 | case DW_TAG_class_type: |
680b30c7 | 21784 | case DW_TAG_interface_type: |
c906108c SS |
21785 | case DW_TAG_structure_type: |
21786 | case DW_TAG_union_type: | |
72019c9c | 21787 | case DW_TAG_set_type: |
c906108c | 21788 | case DW_TAG_enumeration_type: |
f1e6e072 | 21789 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21790 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21791 | |
63d06c5c | 21792 | { |
9c37b5ae | 21793 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21794 | really ever be static objects: otherwise, if you try |
21795 | to, say, break of a class's method and you're in a file | |
21796 | which doesn't mention that class, it won't work unless | |
21797 | the check for all static symbols in lookup_symbol_aux | |
21798 | saves you. See the OtherFileClass tests in | |
21799 | gdb.c++/namespace.exp. */ | |
21800 | ||
e37fd15a | 21801 | if (!suppress_add) |
34eaf542 | 21802 | { |
c24bdb02 | 21803 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 21804 | list_to_add |
c24bdb02 | 21805 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 21806 | && cu->language == language_cplus |
c24bdb02 | 21807 | ? builder->get_global_symbols () |
804d2729 | 21808 | : cu->list_in_scope); |
63d06c5c | 21809 | |
64382290 | 21810 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21811 | ... }" also defines a typedef for "foo". */ |
64382290 | 21812 | if (cu->language == language_cplus |
45280282 | 21813 | || cu->language == language_ada |
c44af4eb TT |
21814 | || cu->language == language_d |
21815 | || cu->language == language_rust) | |
64382290 TT |
21816 | { |
21817 | /* The symbol's name is already allocated along | |
21818 | with this objfile, so we don't need to | |
21819 | duplicate it for the type. */ | |
7d93a1e0 | 21820 | if (SYMBOL_TYPE (sym)->name () == 0) |
d0e39ea2 | 21821 | SYMBOL_TYPE (sym)->set_name (sym->search_name ()); |
64382290 | 21822 | } |
63d06c5c DC |
21823 | } |
21824 | } | |
c906108c SS |
21825 | break; |
21826 | case DW_TAG_typedef: | |
f1e6e072 | 21827 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21828 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21829 | list_to_add = cu->list_in_scope; |
63d06c5c | 21830 | break; |
d8f62e84 | 21831 | case DW_TAG_array_type: |
c906108c | 21832 | case DW_TAG_base_type: |
dda83cd7 | 21833 | case DW_TAG_subrange_type: |
f1e6e072 | 21834 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21835 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21836 | list_to_add = cu->list_in_scope; |
c906108c SS |
21837 | break; |
21838 | case DW_TAG_enumerator: | |
e142c38c | 21839 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 21840 | if (attr != nullptr) |
c906108c | 21841 | { |
e7c27a73 | 21842 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21843 | } |
63d06c5c DC |
21844 | { |
21845 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21846 | DW_TAG_class_type, etc. block. */ | |
21847 | ||
804d2729 | 21848 | list_to_add |
c24bdb02 | 21849 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 21850 | && cu->language == language_cplus |
c24bdb02 | 21851 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 21852 | : cu->list_in_scope); |
63d06c5c | 21853 | } |
c906108c | 21854 | break; |
74921315 | 21855 | case DW_TAG_imported_declaration: |
5c4e30ca | 21856 | case DW_TAG_namespace: |
f1e6e072 | 21857 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 21858 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 21859 | break; |
530e8392 KB |
21860 | case DW_TAG_module: |
21861 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21862 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 21863 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 21864 | break; |
4357ac6c | 21865 | case DW_TAG_common_block: |
f1e6e072 | 21866 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 21867 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 21868 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 21869 | break; |
c906108c SS |
21870 | default: |
21871 | /* Not a tag we recognize. Hopefully we aren't processing | |
21872 | trash data, but since we must specifically ignore things | |
21873 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21874 | this point. */ |
b98664d3 | 21875 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 21876 | dwarf_tag_name (die->tag)); |
c906108c SS |
21877 | break; |
21878 | } | |
df8a16a1 | 21879 | |
e37fd15a SW |
21880 | if (suppress_add) |
21881 | { | |
21882 | sym->hash_next = objfile->template_symbols; | |
21883 | objfile->template_symbols = sym; | |
21884 | list_to_add = NULL; | |
21885 | } | |
21886 | ||
21887 | if (list_to_add != NULL) | |
d3cb6808 | 21888 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 21889 | |
df8a16a1 DJ |
21890 | /* For the benefit of old versions of GCC, check for anonymous |
21891 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21892 | if (!cu->processing_has_namespace_info |
94af9270 | 21893 | && cu->language == language_cplus) |
c24bdb02 | 21894 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
21895 | } |
21896 | return (sym); | |
21897 | } | |
21898 | ||
98bfdba5 PA |
21899 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21900 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21901 | standard (v4) is not entirely clear about the meaning of using | |
21902 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21903 | wider than the data. The conclusion of a discussion on the DWARF | |
21904 | list was that this is unspecified. We choose to always zero-extend | |
21905 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21906 | |
98bfdba5 | 21907 | static gdb_byte * |
ff39bb5e | 21908 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21909 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21910 | { |
5e22e966 | 21911 | struct objfile *objfile = cu->per_objfile->objfile; |
e17a4113 UW |
21912 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21913 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
529908cb | 21914 | LONGEST l = attr->constant_value (0); |
98bfdba5 PA |
21915 | |
21916 | if (bits < sizeof (*value) * 8) | |
21917 | { | |
21918 | l &= ((LONGEST) 1 << bits) - 1; | |
21919 | *value = l; | |
21920 | } | |
21921 | else if (bits == sizeof (*value) * 8) | |
21922 | *value = l; | |
21923 | else | |
21924 | { | |
224c3ddb | 21925 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21926 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21927 | return bytes; | |
21928 | } | |
21929 | ||
21930 | return NULL; | |
21931 | } | |
21932 | ||
21933 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21934 | the value does not fit in *VALUE, set *BYTES - either already | |
21935 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21936 | or, set *BATON, if we translated the constant to a location | |
21937 | expression. */ | |
21938 | ||
21939 | static void | |
ff39bb5e | 21940 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21941 | const char *name, struct obstack *obstack, |
21942 | struct dwarf2_cu *cu, | |
d521ce57 | 21943 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21944 | struct dwarf2_locexpr_baton **baton) |
21945 | { | |
5e22e966 | 21946 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 21947 | struct objfile *objfile = per_objfile->objfile; |
98bfdba5 | 21948 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 21949 | struct dwarf_block *blk; |
98bfdba5 PA |
21950 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21951 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21952 | ||
21953 | *value = 0; | |
21954 | *bytes = NULL; | |
21955 | *baton = NULL; | |
c906108c SS |
21956 | |
21957 | switch (attr->form) | |
21958 | { | |
21959 | case DW_FORM_addr: | |
336d760d | 21960 | case DW_FORM_addrx: |
3019eac3 | 21961 | case DW_FORM_GNU_addr_index: |
ac56253d | 21962 | { |
ac56253d TT |
21963 | gdb_byte *data; |
21964 | ||
98bfdba5 PA |
21965 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21966 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21967 | cu_header->addr_size, |
98bfdba5 | 21968 | TYPE_LENGTH (type)); |
ac56253d TT |
21969 | /* Symbols of this form are reasonably rare, so we just |
21970 | piggyback on the existing location code rather than writing | |
21971 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21972 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
a50264ba | 21973 | (*baton)->per_objfile = per_objfile; |
98bfdba5 PA |
21974 | (*baton)->per_cu = cu->per_cu; |
21975 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 21976 | |
98bfdba5 | 21977 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 21978 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 21979 | (*baton)->data = data; |
ac56253d TT |
21980 | |
21981 | data[0] = DW_OP_addr; | |
21982 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
36d378cf | 21983 | byte_order, attr->as_address ()); |
ac56253d | 21984 | data[cu_header->addr_size + 1] = DW_OP_stack_value; |
ac56253d | 21985 | } |
c906108c | 21986 | break; |
4ac36638 | 21987 | case DW_FORM_string: |
93b5768b | 21988 | case DW_FORM_strp: |
cf532bd1 | 21989 | case DW_FORM_strx: |
3019eac3 | 21990 | case DW_FORM_GNU_str_index: |
36586728 | 21991 | case DW_FORM_GNU_strp_alt: |
c6481205 | 21992 | /* The string is already allocated on the objfile obstack, point |
98bfdba5 | 21993 | directly to it. */ |
2c830f54 | 21994 | *bytes = (const gdb_byte *) attr->as_string (); |
93b5768b | 21995 | break; |
c906108c SS |
21996 | case DW_FORM_block1: |
21997 | case DW_FORM_block2: | |
21998 | case DW_FORM_block4: | |
21999 | case DW_FORM_block: | |
2dc7f7b3 | 22000 | case DW_FORM_exprloc: |
0224619f | 22001 | case DW_FORM_data16: |
9d2246fc | 22002 | blk = attr->as_block (); |
98bfdba5 PA |
22003 | if (TYPE_LENGTH (type) != blk->size) |
22004 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
22005 | TYPE_LENGTH (type)); | |
22006 | *bytes = blk->data; | |
c906108c | 22007 | break; |
2df3850c JM |
22008 | |
22009 | /* The DW_AT_const_value attributes are supposed to carry the | |
22010 | symbol's value "represented as it would be on the target | |
22011 | architecture." By the time we get here, it's already been | |
22012 | converted to host endianness, so we just need to sign- or | |
22013 | zero-extend it as appropriate. */ | |
22014 | case DW_FORM_data1: | |
3aef2284 | 22015 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 22016 | break; |
c906108c | 22017 | case DW_FORM_data2: |
3aef2284 | 22018 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 22019 | break; |
c906108c | 22020 | case DW_FORM_data4: |
3aef2284 | 22021 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 22022 | break; |
c906108c | 22023 | case DW_FORM_data8: |
3aef2284 | 22024 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
22025 | break; |
22026 | ||
c906108c | 22027 | case DW_FORM_sdata: |
663c44ac | 22028 | case DW_FORM_implicit_const: |
1bc397c5 | 22029 | *value = attr->as_signed (); |
2df3850c JM |
22030 | break; |
22031 | ||
c906108c | 22032 | case DW_FORM_udata: |
529908cb | 22033 | *value = attr->as_unsigned (); |
c906108c | 22034 | break; |
2df3850c | 22035 | |
c906108c | 22036 | default: |
b98664d3 | 22037 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 22038 | dwarf_form_name (attr->form)); |
98bfdba5 | 22039 | *value = 0; |
c906108c SS |
22040 | break; |
22041 | } | |
22042 | } | |
22043 | ||
2df3850c | 22044 | |
98bfdba5 PA |
22045 | /* Copy constant value from an attribute to a symbol. */ |
22046 | ||
2df3850c | 22047 | static void |
ff39bb5e | 22048 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 22049 | struct dwarf2_cu *cu) |
2df3850c | 22050 | { |
5e22e966 | 22051 | struct objfile *objfile = cu->per_objfile->objfile; |
12df843f | 22052 | LONGEST value; |
d521ce57 | 22053 | const gdb_byte *bytes; |
98bfdba5 | 22054 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 22055 | |
98bfdba5 | 22056 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 22057 | sym->print_name (), |
98bfdba5 PA |
22058 | &objfile->objfile_obstack, cu, |
22059 | &value, &bytes, &baton); | |
2df3850c | 22060 | |
98bfdba5 PA |
22061 | if (baton != NULL) |
22062 | { | |
98bfdba5 | 22063 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 22064 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
22065 | } |
22066 | else if (bytes != NULL) | |
22067 | { | |
22068 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 22069 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
22070 | } |
22071 | else | |
22072 | { | |
22073 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 22074 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 22075 | } |
2df3850c JM |
22076 | } |
22077 | ||
c906108c SS |
22078 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
22079 | ||
22080 | static struct type * | |
e7c27a73 | 22081 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22082 | { |
c906108c | 22083 | struct attribute *type_attr; |
c906108c | 22084 | |
e142c38c | 22085 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
22086 | if (!type_attr) |
22087 | { | |
5e22e966 | 22088 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 22089 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 22090 | return objfile_type (objfile)->builtin_void; |
c906108c | 22091 | } |
348e048f | 22092 | |
673bfd45 | 22093 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22094 | } |
22095 | ||
b4ba55a1 JB |
22096 | /* True iff CU's producer generates GNAT Ada auxiliary information |
22097 | that allows to find parallel types through that information instead | |
22098 | of having to do expensive parallel lookups by type name. */ | |
22099 | ||
22100 | static int | |
22101 | need_gnat_info (struct dwarf2_cu *cu) | |
22102 | { | |
de4cb04a JB |
22103 | /* Assume that the Ada compiler was GNAT, which always produces |
22104 | the auxiliary information. */ | |
22105 | return (cu->language == language_ada); | |
b4ba55a1 JB |
22106 | } |
22107 | ||
b4ba55a1 JB |
22108 | /* Return the auxiliary type of the die in question using its |
22109 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
22110 | attribute is not present. */ | |
22111 | ||
22112 | static struct type * | |
22113 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
22114 | { | |
b4ba55a1 | 22115 | struct attribute *type_attr; |
b4ba55a1 JB |
22116 | |
22117 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
22118 | if (!type_attr) | |
22119 | return NULL; | |
22120 | ||
673bfd45 | 22121 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
22122 | } |
22123 | ||
22124 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
22125 | descriptive type accordingly. */ | |
22126 | ||
22127 | static void | |
22128 | set_descriptive_type (struct type *type, struct die_info *die, | |
22129 | struct dwarf2_cu *cu) | |
22130 | { | |
22131 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
22132 | ||
22133 | if (descriptive_type) | |
22134 | { | |
22135 | ALLOCATE_GNAT_AUX_TYPE (type); | |
22136 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
22137 | } | |
22138 | } | |
22139 | ||
c906108c SS |
22140 | /* Return the containing type of the die in question using its |
22141 | DW_AT_containing_type attribute. */ | |
22142 | ||
22143 | static struct type * | |
e7c27a73 | 22144 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22145 | { |
c906108c | 22146 | struct attribute *type_attr; |
5e22e966 | 22147 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 22148 | |
e142c38c | 22149 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
22150 | if (!type_attr) |
22151 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 22152 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 22153 | |
673bfd45 | 22154 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22155 | } |
22156 | ||
ac9ec31b DE |
22157 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
22158 | ||
22159 | static struct type * | |
22160 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
22161 | { | |
976ca316 SM |
22162 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
22163 | struct objfile *objfile = per_objfile->objfile; | |
528e1572 | 22164 | char *saved; |
ac9ec31b | 22165 | |
528e1572 SM |
22166 | std::string message |
22167 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
22168 | objfile_name (objfile), | |
22169 | sect_offset_str (cu->header.sect_off), | |
22170 | sect_offset_str (die->sect_off)); | |
efba19b0 | 22171 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 22172 | |
19f392bc | 22173 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
22174 | } |
22175 | ||
673bfd45 | 22176 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
22177 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
22178 | DW_AT_containing_type. | |
673bfd45 DE |
22179 | If there is no type substitute an error marker. */ |
22180 | ||
c906108c | 22181 | static struct type * |
ff39bb5e | 22182 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 22183 | struct dwarf2_cu *cu) |
c906108c | 22184 | { |
976ca316 SM |
22185 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
22186 | struct objfile *objfile = per_objfile->objfile; | |
f792889a DJ |
22187 | struct type *this_type; |
22188 | ||
ac9ec31b DE |
22189 | gdb_assert (attr->name == DW_AT_type |
22190 | || attr->name == DW_AT_GNAT_descriptive_type | |
22191 | || attr->name == DW_AT_containing_type); | |
22192 | ||
673bfd45 DE |
22193 | /* First see if we have it cached. */ |
22194 | ||
36586728 TT |
22195 | if (attr->form == DW_FORM_GNU_ref_alt) |
22196 | { | |
22197 | struct dwarf2_per_cu_data *per_cu; | |
0826b30a | 22198 | sect_offset sect_off = attr->get_ref_die_offset (); |
36586728 | 22199 | |
976ca316 SM |
22200 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, per_objfile); |
22201 | this_type = get_die_type_at_offset (sect_off, per_cu, per_objfile); | |
36586728 | 22202 | } |
cd6c91b4 | 22203 | else if (attr->form_is_ref ()) |
673bfd45 | 22204 | { |
0826b30a | 22205 | sect_offset sect_off = attr->get_ref_die_offset (); |
673bfd45 | 22206 | |
976ca316 | 22207 | this_type = get_die_type_at_offset (sect_off, cu->per_cu, per_objfile); |
673bfd45 | 22208 | } |
55f1336d | 22209 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 22210 | { |
630ed6b9 | 22211 | ULONGEST signature = attr->as_signature (); |
673bfd45 | 22212 | |
ac9ec31b | 22213 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
22214 | } |
22215 | else | |
22216 | { | |
b98664d3 | 22217 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
22218 | " at %s [in module %s]"), |
22219 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 22220 | objfile_name (objfile)); |
ac9ec31b | 22221 | return build_error_marker_type (cu, die); |
673bfd45 DE |
22222 | } |
22223 | ||
22224 | /* If not cached we need to read it in. */ | |
22225 | ||
22226 | if (this_type == NULL) | |
22227 | { | |
ac9ec31b | 22228 | struct die_info *type_die = NULL; |
673bfd45 DE |
22229 | struct dwarf2_cu *type_cu = cu; |
22230 | ||
cd6c91b4 | 22231 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22232 | type_die = follow_die_ref (die, attr, &type_cu); |
22233 | if (type_die == NULL) | |
22234 | return build_error_marker_type (cu, die); | |
22235 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
22236 | from an inter-CU reference and the type's CU got expanded before |
22237 | ours. */ | |
ac9ec31b | 22238 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
22239 | } |
22240 | ||
22241 | /* If we still don't have a type use an error marker. */ | |
22242 | ||
22243 | if (this_type == NULL) | |
ac9ec31b | 22244 | return build_error_marker_type (cu, die); |
673bfd45 | 22245 | |
f792889a | 22246 | return this_type; |
c906108c SS |
22247 | } |
22248 | ||
673bfd45 DE |
22249 | /* Return the type in DIE, CU. |
22250 | Returns NULL for invalid types. | |
22251 | ||
02142a6c | 22252 | This first does a lookup in die_type_hash, |
673bfd45 DE |
22253 | and only reads the die in if necessary. |
22254 | ||
22255 | NOTE: This can be called when reading in partial or full symbols. */ | |
22256 | ||
f792889a | 22257 | static struct type * |
e7c27a73 | 22258 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22259 | { |
f792889a DJ |
22260 | struct type *this_type; |
22261 | ||
22262 | this_type = get_die_type (die, cu); | |
22263 | if (this_type) | |
22264 | return this_type; | |
22265 | ||
673bfd45 DE |
22266 | return read_type_die_1 (die, cu); |
22267 | } | |
22268 | ||
22269 | /* Read the type in DIE, CU. | |
22270 | Returns NULL for invalid types. */ | |
22271 | ||
22272 | static struct type * | |
22273 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
22274 | { | |
22275 | struct type *this_type = NULL; | |
22276 | ||
c906108c SS |
22277 | switch (die->tag) |
22278 | { | |
22279 | case DW_TAG_class_type: | |
680b30c7 | 22280 | case DW_TAG_interface_type: |
c906108c SS |
22281 | case DW_TAG_structure_type: |
22282 | case DW_TAG_union_type: | |
f792889a | 22283 | this_type = read_structure_type (die, cu); |
c906108c SS |
22284 | break; |
22285 | case DW_TAG_enumeration_type: | |
f792889a | 22286 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
22287 | break; |
22288 | case DW_TAG_subprogram: | |
22289 | case DW_TAG_subroutine_type: | |
edb3359d | 22290 | case DW_TAG_inlined_subroutine: |
f792889a | 22291 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
22292 | break; |
22293 | case DW_TAG_array_type: | |
f792889a | 22294 | this_type = read_array_type (die, cu); |
c906108c | 22295 | break; |
72019c9c | 22296 | case DW_TAG_set_type: |
f792889a | 22297 | this_type = read_set_type (die, cu); |
72019c9c | 22298 | break; |
c906108c | 22299 | case DW_TAG_pointer_type: |
f792889a | 22300 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
22301 | break; |
22302 | case DW_TAG_ptr_to_member_type: | |
f792889a | 22303 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
22304 | break; |
22305 | case DW_TAG_reference_type: | |
4297a3f0 AV |
22306 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
22307 | break; | |
22308 | case DW_TAG_rvalue_reference_type: | |
22309 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
22310 | break; |
22311 | case DW_TAG_const_type: | |
f792889a | 22312 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
22313 | break; |
22314 | case DW_TAG_volatile_type: | |
f792889a | 22315 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 22316 | break; |
06d66ee9 TT |
22317 | case DW_TAG_restrict_type: |
22318 | this_type = read_tag_restrict_type (die, cu); | |
22319 | break; | |
c906108c | 22320 | case DW_TAG_string_type: |
f792889a | 22321 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
22322 | break; |
22323 | case DW_TAG_typedef: | |
f792889a | 22324 | this_type = read_typedef (die, cu); |
c906108c | 22325 | break; |
a02abb62 | 22326 | case DW_TAG_subrange_type: |
f792889a | 22327 | this_type = read_subrange_type (die, cu); |
a02abb62 | 22328 | break; |
c906108c | 22329 | case DW_TAG_base_type: |
f792889a | 22330 | this_type = read_base_type (die, cu); |
c906108c | 22331 | break; |
81a17f79 | 22332 | case DW_TAG_unspecified_type: |
f792889a | 22333 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 22334 | break; |
0114d602 DJ |
22335 | case DW_TAG_namespace: |
22336 | this_type = read_namespace_type (die, cu); | |
22337 | break; | |
f55ee35c JK |
22338 | case DW_TAG_module: |
22339 | this_type = read_module_type (die, cu); | |
22340 | break; | |
a2c2acaf MW |
22341 | case DW_TAG_atomic_type: |
22342 | this_type = read_tag_atomic_type (die, cu); | |
22343 | break; | |
c906108c | 22344 | default: |
b98664d3 | 22345 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 22346 | dwarf_tag_name (die->tag)); |
c906108c SS |
22347 | break; |
22348 | } | |
63d06c5c | 22349 | |
f792889a | 22350 | return this_type; |
63d06c5c DC |
22351 | } |
22352 | ||
abc72ce4 DE |
22353 | /* See if we can figure out if the class lives in a namespace. We do |
22354 | this by looking for a member function; its demangled name will | |
22355 | contain namespace info, if there is any. | |
22356 | Return the computed name or NULL. | |
22357 | Space for the result is allocated on the objfile's obstack. | |
22358 | This is the full-die version of guess_partial_die_structure_name. | |
22359 | In this case we know DIE has no useful parent. */ | |
22360 | ||
43816ebc | 22361 | static const char * |
abc72ce4 DE |
22362 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
22363 | { | |
22364 | struct die_info *spec_die; | |
22365 | struct dwarf2_cu *spec_cu; | |
22366 | struct die_info *child; | |
5e22e966 | 22367 | struct objfile *objfile = cu->per_objfile->objfile; |
abc72ce4 DE |
22368 | |
22369 | spec_cu = cu; | |
22370 | spec_die = die_specification (die, &spec_cu); | |
22371 | if (spec_die != NULL) | |
22372 | { | |
22373 | die = spec_die; | |
22374 | cu = spec_cu; | |
22375 | } | |
22376 | ||
22377 | for (child = die->child; | |
22378 | child != NULL; | |
22379 | child = child->sibling) | |
22380 | { | |
22381 | if (child->tag == DW_TAG_subprogram) | |
22382 | { | |
73b9be8b | 22383 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22384 | |
7d45c7c3 | 22385 | if (linkage_name != NULL) |
abc72ce4 | 22386 | { |
43816ebc | 22387 | gdb::unique_xmalloc_ptr<char> actual_name |
eff93b4d | 22388 | (cu->language_defn->class_name_from_physname (linkage_name)); |
43816ebc | 22389 | const char *name = NULL; |
abc72ce4 DE |
22390 | |
22391 | if (actual_name != NULL) | |
22392 | { | |
15d034d0 | 22393 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22394 | |
22395 | if (die_name != NULL | |
43816ebc | 22396 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
22397 | { |
22398 | /* Strip off the class name from the full name. | |
22399 | We want the prefix. */ | |
22400 | int die_name_len = strlen (die_name); | |
43816ebc TT |
22401 | int actual_name_len = strlen (actual_name.get ()); |
22402 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
22403 | |
22404 | /* Test for '::' as a sanity check. */ | |
22405 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 22406 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 22407 | name = obstack_strndup ( |
e3b94546 | 22408 | &objfile->per_bfd->storage_obstack, |
43816ebc | 22409 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22410 | } |
22411 | } | |
abc72ce4 DE |
22412 | return name; |
22413 | } | |
22414 | } | |
22415 | } | |
22416 | ||
22417 | return NULL; | |
22418 | } | |
22419 | ||
96408a79 SA |
22420 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22421 | prefix part in such case. See | |
22422 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22423 | ||
a121b7c1 | 22424 | static const char * |
96408a79 SA |
22425 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22426 | { | |
22427 | struct attribute *attr; | |
e6a959d6 | 22428 | const char *base; |
96408a79 SA |
22429 | |
22430 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22431 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22432 | return NULL; | |
22433 | ||
7d45c7c3 | 22434 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22435 | return NULL; |
22436 | ||
73b9be8b | 22437 | attr = dw2_linkage_name_attr (die, cu); |
2c830f54 TT |
22438 | const char *attr_name = attr->as_string (); |
22439 | if (attr == NULL || attr_name == NULL) | |
96408a79 SA |
22440 | return NULL; |
22441 | ||
22442 | /* dwarf2_name had to be already called. */ | |
3b64bf15 | 22443 | gdb_assert (attr->canonical_string_p ()); |
96408a79 SA |
22444 | |
22445 | /* Strip the base name, keep any leading namespaces/classes. */ | |
2c830f54 TT |
22446 | base = strrchr (attr_name, ':'); |
22447 | if (base == NULL || base == attr_name || base[-1] != ':') | |
96408a79 SA |
22448 | return ""; |
22449 | ||
5e22e966 | 22450 | struct objfile *objfile = cu->per_objfile->objfile; |
0cf9feb9 | 22451 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
2c830f54 TT |
22452 | attr_name, |
22453 | &base[-1] - attr_name); | |
96408a79 SA |
22454 | } |
22455 | ||
fdde2d81 | 22456 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22457 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22458 | |
0114d602 DJ |
22459 | For example, if we're within the method foo() in the following |
22460 | code: | |
22461 | ||
22462 | namespace N { | |
22463 | class C { | |
22464 | void foo () { | |
22465 | } | |
22466 | }; | |
22467 | } | |
22468 | ||
22469 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22470 | |
0d5cff50 | 22471 | static const char * |
e142c38c | 22472 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22473 | { |
976ca316 | 22474 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
0114d602 DJ |
22475 | struct die_info *parent, *spec_die; |
22476 | struct dwarf2_cu *spec_cu; | |
22477 | struct type *parent_type; | |
a121b7c1 | 22478 | const char *retval; |
63d06c5c | 22479 | |
9c37b5ae | 22480 | if (cu->language != language_cplus |
c44af4eb TT |
22481 | && cu->language != language_fortran && cu->language != language_d |
22482 | && cu->language != language_rust) | |
0114d602 DJ |
22483 | return ""; |
22484 | ||
96408a79 SA |
22485 | retval = anonymous_struct_prefix (die, cu); |
22486 | if (retval) | |
22487 | return retval; | |
22488 | ||
0114d602 DJ |
22489 | /* We have to be careful in the presence of DW_AT_specification. |
22490 | For example, with GCC 3.4, given the code | |
22491 | ||
22492 | namespace N { | |
22493 | void foo() { | |
22494 | // Definition of N::foo. | |
22495 | } | |
22496 | } | |
22497 | ||
22498 | then we'll have a tree of DIEs like this: | |
22499 | ||
22500 | 1: DW_TAG_compile_unit | |
22501 | 2: DW_TAG_namespace // N | |
22502 | 3: DW_TAG_subprogram // declaration of N::foo | |
22503 | 4: DW_TAG_subprogram // definition of N::foo | |
22504 | DW_AT_specification // refers to die #3 | |
22505 | ||
22506 | Thus, when processing die #4, we have to pretend that we're in | |
22507 | the context of its DW_AT_specification, namely the contex of die | |
22508 | #3. */ | |
22509 | spec_cu = cu; | |
22510 | spec_die = die_specification (die, &spec_cu); | |
22511 | if (spec_die == NULL) | |
22512 | parent = die->parent; | |
22513 | else | |
63d06c5c | 22514 | { |
0114d602 DJ |
22515 | parent = spec_die->parent; |
22516 | cu = spec_cu; | |
63d06c5c | 22517 | } |
0114d602 DJ |
22518 | |
22519 | if (parent == NULL) | |
22520 | return ""; | |
98bfdba5 PA |
22521 | else if (parent->building_fullname) |
22522 | { | |
22523 | const char *name; | |
22524 | const char *parent_name; | |
22525 | ||
22526 | /* It has been seen on RealView 2.2 built binaries, | |
22527 | DW_TAG_template_type_param types actually _defined_ as | |
22528 | children of the parent class: | |
22529 | ||
22530 | enum E {}; | |
22531 | template class <class Enum> Class{}; | |
22532 | Class<enum E> class_e; | |
22533 | ||
dda83cd7 SM |
22534 | 1: DW_TAG_class_type (Class) |
22535 | 2: DW_TAG_enumeration_type (E) | |
22536 | 3: DW_TAG_enumerator (enum1:0) | |
22537 | 3: DW_TAG_enumerator (enum2:1) | |
22538 | ... | |
22539 | 2: DW_TAG_template_type_param | |
22540 | DW_AT_type DW_FORM_ref_udata (E) | |
98bfdba5 PA |
22541 | |
22542 | Besides being broken debug info, it can put GDB into an | |
22543 | infinite loop. Consider: | |
22544 | ||
22545 | When we're building the full name for Class<E>, we'll start | |
22546 | at Class, and go look over its template type parameters, | |
22547 | finding E. We'll then try to build the full name of E, and | |
22548 | reach here. We're now trying to build the full name of E, | |
22549 | and look over the parent DIE for containing scope. In the | |
22550 | broken case, if we followed the parent DIE of E, we'd again | |
22551 | find Class, and once again go look at its template type | |
22552 | arguments, etc., etc. Simply don't consider such parent die | |
22553 | as source-level parent of this die (it can't be, the language | |
22554 | doesn't allow it), and break the loop here. */ | |
22555 | name = dwarf2_name (die, cu); | |
22556 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22557 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22558 | name ? name : "<unknown>", |
22559 | parent_name ? parent_name : "<unknown>"); | |
22560 | return ""; | |
22561 | } | |
63d06c5c | 22562 | else |
0114d602 DJ |
22563 | switch (parent->tag) |
22564 | { | |
63d06c5c | 22565 | case DW_TAG_namespace: |
0114d602 | 22566 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22567 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22568 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22569 | Work around this problem here. */ | |
22570 | if (cu->language == language_cplus | |
7d93a1e0 | 22571 | && strcmp (parent_type->name (), "::") == 0) |
acebe513 | 22572 | return ""; |
0114d602 | 22573 | /* We give a name to even anonymous namespaces. */ |
7d93a1e0 | 22574 | return parent_type->name (); |
63d06c5c | 22575 | case DW_TAG_class_type: |
680b30c7 | 22576 | case DW_TAG_interface_type: |
63d06c5c | 22577 | case DW_TAG_structure_type: |
0114d602 | 22578 | case DW_TAG_union_type: |
f55ee35c | 22579 | case DW_TAG_module: |
0114d602 | 22580 | parent_type = read_type_die (parent, cu); |
7d93a1e0 SM |
22581 | if (parent_type->name () != NULL) |
22582 | return parent_type->name (); | |
0114d602 DJ |
22583 | else |
22584 | /* An anonymous structure is only allowed non-static data | |
22585 | members; no typedefs, no member functions, et cetera. | |
22586 | So it does not need a prefix. */ | |
22587 | return ""; | |
abc72ce4 | 22588 | case DW_TAG_compile_unit: |
95554aad | 22589 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22590 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22591 | if (cu->language == language_cplus | |
976ca316 | 22592 | && !per_objfile->per_bfd->types.empty () |
abc72ce4 DE |
22593 | && die->child != NULL |
22594 | && (die->tag == DW_TAG_class_type | |
22595 | || die->tag == DW_TAG_structure_type | |
22596 | || die->tag == DW_TAG_union_type)) | |
22597 | { | |
43816ebc | 22598 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
22599 | if (name != NULL) |
22600 | return name; | |
22601 | } | |
22602 | return ""; | |
0a4b0913 AB |
22603 | case DW_TAG_subprogram: |
22604 | /* Nested subroutines in Fortran get a prefix with the name | |
22605 | of the parent's subroutine. */ | |
22606 | if (cu->language == language_fortran) | |
22607 | { | |
22608 | if ((die->tag == DW_TAG_subprogram) | |
22609 | && (dwarf2_name (parent, cu) != NULL)) | |
22610 | return dwarf2_name (parent, cu); | |
22611 | } | |
22612 | return determine_prefix (parent, cu); | |
3d567982 TT |
22613 | case DW_TAG_enumeration_type: |
22614 | parent_type = read_type_die (parent, cu); | |
3bc440a2 | 22615 | if (parent_type->is_declared_class ()) |
3d567982 | 22616 | { |
7d93a1e0 SM |
22617 | if (parent_type->name () != NULL) |
22618 | return parent_type->name (); | |
3d567982 TT |
22619 | return ""; |
22620 | } | |
22621 | /* Fall through. */ | |
63d06c5c | 22622 | default: |
8176b9b8 | 22623 | return determine_prefix (parent, cu); |
63d06c5c | 22624 | } |
63d06c5c DC |
22625 | } |
22626 | ||
3e43a32a MS |
22627 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22628 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22629 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22630 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22631 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22632 | |
f55ee35c | 22633 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22634 | |
22635 | static char * | |
f55ee35c | 22636 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
dda83cd7 | 22637 | int physname, struct dwarf2_cu *cu) |
63d06c5c | 22638 | { |
f55ee35c | 22639 | const char *lead = ""; |
5c315b68 | 22640 | const char *sep; |
63d06c5c | 22641 | |
3e43a32a MS |
22642 | if (suffix == NULL || suffix[0] == '\0' |
22643 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22644 | sep = ""; |
45280282 IB |
22645 | else if (cu->language == language_d) |
22646 | { | |
22647 | /* For D, the 'main' function could be defined in any module, but it | |
22648 | should never be prefixed. */ | |
22649 | if (strcmp (suffix, "D main") == 0) | |
22650 | { | |
22651 | prefix = ""; | |
22652 | sep = ""; | |
22653 | } | |
22654 | else | |
22655 | sep = "."; | |
22656 | } | |
f55ee35c JK |
22657 | else if (cu->language == language_fortran && physname) |
22658 | { | |
22659 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22660 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22661 | ||
22662 | lead = "__"; | |
22663 | sep = "_MOD_"; | |
22664 | } | |
987504bb JJ |
22665 | else |
22666 | sep = "::"; | |
63d06c5c | 22667 | |
6dd47d34 DE |
22668 | if (prefix == NULL) |
22669 | prefix = ""; | |
22670 | if (suffix == NULL) | |
22671 | suffix = ""; | |
22672 | ||
987504bb JJ |
22673 | if (obs == NULL) |
22674 | { | |
3e43a32a | 22675 | char *retval |
224c3ddb SM |
22676 | = ((char *) |
22677 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22678 | |
f55ee35c JK |
22679 | strcpy (retval, lead); |
22680 | strcat (retval, prefix); | |
6dd47d34 DE |
22681 | strcat (retval, sep); |
22682 | strcat (retval, suffix); | |
63d06c5c DC |
22683 | return retval; |
22684 | } | |
987504bb JJ |
22685 | else |
22686 | { | |
22687 | /* We have an obstack. */ | |
f55ee35c | 22688 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22689 | } |
63d06c5c DC |
22690 | } |
22691 | ||
71c25dea TT |
22692 | /* Get name of a die, return NULL if not found. */ |
22693 | ||
15d034d0 TT |
22694 | static const char * |
22695 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
be1e3d3e | 22696 | struct objfile *objfile) |
71c25dea TT |
22697 | { |
22698 | if (name && cu->language == language_cplus) | |
22699 | { | |
596dc4ad TT |
22700 | gdb::unique_xmalloc_ptr<char> canon_name |
22701 | = cp_canonicalize_string (name); | |
71c25dea | 22702 | |
596dc4ad TT |
22703 | if (canon_name != nullptr) |
22704 | name = objfile->intern (canon_name.get ()); | |
71c25dea TT |
22705 | } |
22706 | ||
22707 | return name; | |
c906108c SS |
22708 | } |
22709 | ||
96553a0c DE |
22710 | /* Get name of a die, return NULL if not found. |
22711 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22712 | |
15d034d0 | 22713 | static const char * |
e142c38c | 22714 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22715 | { |
22716 | struct attribute *attr; | |
5e22e966 | 22717 | struct objfile *objfile = cu->per_objfile->objfile; |
9219021c | 22718 | |
e142c38c | 22719 | attr = dwarf2_attr (die, DW_AT_name, cu); |
2c830f54 TT |
22720 | const char *attr_name = attr == nullptr ? nullptr : attr->as_string (); |
22721 | if (attr_name == nullptr | |
96553a0c | 22722 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22723 | && die->tag != DW_TAG_class_type |
22724 | && die->tag != DW_TAG_interface_type | |
22725 | && die->tag != DW_TAG_structure_type | |
22726 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22727 | return NULL; |
22728 | ||
22729 | switch (die->tag) | |
22730 | { | |
22731 | case DW_TAG_compile_unit: | |
95554aad | 22732 | case DW_TAG_partial_unit: |
71c25dea TT |
22733 | /* Compilation units have a DW_AT_name that is a filename, not |
22734 | a source language identifier. */ | |
22735 | case DW_TAG_enumeration_type: | |
22736 | case DW_TAG_enumerator: | |
22737 | /* These tags always have simple identifiers already; no need | |
22738 | to canonicalize them. */ | |
2c830f54 | 22739 | return attr_name; |
907af001 | 22740 | |
96553a0c | 22741 | case DW_TAG_namespace: |
2c830f54 TT |
22742 | if (attr_name != nullptr) |
22743 | return attr_name; | |
96553a0c DE |
22744 | return CP_ANONYMOUS_NAMESPACE_STR; |
22745 | ||
907af001 UW |
22746 | case DW_TAG_class_type: |
22747 | case DW_TAG_interface_type: | |
22748 | case DW_TAG_structure_type: | |
22749 | case DW_TAG_union_type: | |
22750 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22751 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22752 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22753 | and GCC 4.4. We work around this problem by ignoring these. */ | |
2c830f54 TT |
22754 | if (attr_name != nullptr |
22755 | && (startswith (attr_name, "._") | |
22756 | || startswith (attr_name, "<anonymous"))) | |
907af001 | 22757 | return NULL; |
53832f31 TT |
22758 | |
22759 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22760 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
2c830f54 | 22761 | if (!attr || attr_name == NULL) |
53832f31 | 22762 | { |
73b9be8b | 22763 | attr = dw2_linkage_name_attr (die, cu); |
95eb9e54 | 22764 | attr_name = attr == nullptr ? nullptr : attr->as_string (); |
2c830f54 | 22765 | if (attr == NULL || attr_name == NULL) |
53832f31 TT |
22766 | return NULL; |
22767 | ||
2c830f54 | 22768 | /* Avoid demangling attr_name the second time on a second |
df5c6c50 | 22769 | call for the same DIE. */ |
3b64bf15 | 22770 | if (!attr->canonical_string_p ()) |
53832f31 | 22771 | { |
43816ebc | 22772 | gdb::unique_xmalloc_ptr<char> demangled |
2c830f54 | 22773 | (gdb_demangle (attr_name, DMGL_TYPES)); |
4f180d53 AT |
22774 | if (demangled == nullptr) |
22775 | return nullptr; | |
43816ebc | 22776 | |
c6481205 | 22777 | attr->set_string_canonical (objfile->intern (demangled.get ())); |
95eb9e54 | 22778 | attr_name = attr->as_string (); |
53832f31 | 22779 | } |
67430cd0 | 22780 | |
2c830f54 TT |
22781 | /* Strip any leading namespaces/classes, keep only the |
22782 | base name. DW_AT_name for named DIEs does not | |
22783 | contain the prefixes. */ | |
22784 | const char *base = strrchr (attr_name, ':'); | |
22785 | if (base && base > attr_name && base[-1] == ':') | |
67430cd0 TT |
22786 | return &base[1]; |
22787 | else | |
2c830f54 | 22788 | return attr_name; |
53832f31 | 22789 | } |
907af001 UW |
22790 | break; |
22791 | ||
71c25dea | 22792 | default: |
907af001 UW |
22793 | break; |
22794 | } | |
22795 | ||
3b64bf15 | 22796 | if (!attr->canonical_string_p ()) |
c6481205 TT |
22797 | attr->set_string_canonical (dwarf2_canonicalize_name (attr_name, cu, |
22798 | objfile)); | |
2c830f54 | 22799 | return attr->as_string (); |
9219021c DC |
22800 | } |
22801 | ||
22802 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22803 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22804 | containing the return value on output. */ | |
9219021c DC |
22805 | |
22806 | static struct die_info * | |
f2f0e013 | 22807 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22808 | { |
22809 | struct attribute *attr; | |
9219021c | 22810 | |
f2f0e013 | 22811 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22812 | if (attr == NULL) |
22813 | return NULL; | |
22814 | ||
f2f0e013 | 22815 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22816 | } |
22817 | ||
f9aca02d | 22818 | static void |
d97bc12b | 22819 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
22820 | { |
22821 | unsigned int i; | |
22822 | ||
d97bc12b | 22823 | print_spaces (indent, f); |
9d8780f0 | 22824 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 22825 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 22826 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
22827 | |
22828 | if (die->parent != NULL) | |
22829 | { | |
22830 | print_spaces (indent, f); | |
9d8780f0 SM |
22831 | fprintf_unfiltered (f, " parent at offset: %s\n", |
22832 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
22833 | } |
22834 | ||
22835 | print_spaces (indent, f); | |
22836 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 22837 | dwarf_bool_name (die->child != NULL)); |
c906108c | 22838 | |
d97bc12b DE |
22839 | print_spaces (indent, f); |
22840 | fprintf_unfiltered (f, " attributes:\n"); | |
22841 | ||
c906108c SS |
22842 | for (i = 0; i < die->num_attrs; ++i) |
22843 | { | |
d97bc12b DE |
22844 | print_spaces (indent, f); |
22845 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
22846 | dwarf_attr_name (die->attrs[i].name), |
22847 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 22848 | |
c906108c SS |
22849 | switch (die->attrs[i].form) |
22850 | { | |
c906108c | 22851 | case DW_FORM_addr: |
336d760d | 22852 | case DW_FORM_addrx: |
3019eac3 | 22853 | case DW_FORM_GNU_addr_index: |
d97bc12b | 22854 | fprintf_unfiltered (f, "address: "); |
36d378cf | 22855 | fputs_filtered (hex_string (die->attrs[i].as_address ()), f); |
c906108c SS |
22856 | break; |
22857 | case DW_FORM_block2: | |
22858 | case DW_FORM_block4: | |
22859 | case DW_FORM_block: | |
22860 | case DW_FORM_block1: | |
56eb65bd | 22861 | fprintf_unfiltered (f, "block: size %s", |
9d2246fc | 22862 | pulongest (die->attrs[i].as_block ()->size)); |
c906108c | 22863 | break; |
2dc7f7b3 | 22864 | case DW_FORM_exprloc: |
56eb65bd | 22865 | fprintf_unfiltered (f, "expression: size %s", |
9d2246fc | 22866 | pulongest (die->attrs[i].as_block ()->size)); |
2dc7f7b3 | 22867 | break; |
0224619f JK |
22868 | case DW_FORM_data16: |
22869 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
22870 | break; | |
4568ecf9 DE |
22871 | case DW_FORM_ref_addr: |
22872 | fprintf_unfiltered (f, "ref address: "); | |
529908cb | 22873 | fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); |
4568ecf9 | 22874 | break; |
36586728 TT |
22875 | case DW_FORM_GNU_ref_alt: |
22876 | fprintf_unfiltered (f, "alt ref address: "); | |
529908cb | 22877 | fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); |
36586728 | 22878 | break; |
10b3939b DJ |
22879 | case DW_FORM_ref1: |
22880 | case DW_FORM_ref2: | |
22881 | case DW_FORM_ref4: | |
4568ecf9 DE |
22882 | case DW_FORM_ref8: |
22883 | case DW_FORM_ref_udata: | |
d97bc12b | 22884 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
529908cb | 22885 | (long) (die->attrs[i].as_unsigned ())); |
10b3939b | 22886 | break; |
c906108c SS |
22887 | case DW_FORM_data1: |
22888 | case DW_FORM_data2: | |
22889 | case DW_FORM_data4: | |
ce5d95e1 | 22890 | case DW_FORM_data8: |
c906108c | 22891 | case DW_FORM_udata: |
43bbcdc2 | 22892 | fprintf_unfiltered (f, "constant: %s", |
529908cb | 22893 | pulongest (die->attrs[i].as_unsigned ())); |
c906108c | 22894 | break; |
2dc7f7b3 TT |
22895 | case DW_FORM_sec_offset: |
22896 | fprintf_unfiltered (f, "section offset: %s", | |
529908cb | 22897 | pulongest (die->attrs[i].as_unsigned ())); |
2dc7f7b3 | 22898 | break; |
55f1336d | 22899 | case DW_FORM_ref_sig8: |
ac9ec31b | 22900 | fprintf_unfiltered (f, "signature: %s", |
630ed6b9 | 22901 | hex_string (die->attrs[i].as_signature ())); |
348e048f | 22902 | break; |
c906108c | 22903 | case DW_FORM_string: |
4bdf3d34 | 22904 | case DW_FORM_strp: |
43988095 | 22905 | case DW_FORM_line_strp: |
cf532bd1 | 22906 | case DW_FORM_strx: |
3019eac3 | 22907 | case DW_FORM_GNU_str_index: |
36586728 | 22908 | case DW_FORM_GNU_strp_alt: |
8285870a | 22909 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c6481205 TT |
22910 | die->attrs[i].as_string () |
22911 | ? die->attrs[i].as_string () : "", | |
22912 | die->attrs[i].canonical_string_p () ? "is" : "not"); | |
c906108c SS |
22913 | break; |
22914 | case DW_FORM_flag: | |
c45bc3f8 | 22915 | if (die->attrs[i].as_boolean ()) |
d97bc12b | 22916 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22917 | else |
d97bc12b | 22918 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22919 | break; |
2dc7f7b3 TT |
22920 | case DW_FORM_flag_present: |
22921 | fprintf_unfiltered (f, "flag: TRUE"); | |
22922 | break; | |
a8329558 | 22923 | case DW_FORM_indirect: |
0963b4bd MS |
22924 | /* The reader will have reduced the indirect form to |
22925 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 22926 | fprintf_unfiltered (f, |
3e43a32a | 22927 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 22928 | break; |
1bc397c5 | 22929 | case DW_FORM_sdata: |
663c44ac JK |
22930 | case DW_FORM_implicit_const: |
22931 | fprintf_unfiltered (f, "constant: %s", | |
1bc397c5 | 22932 | plongest (die->attrs[i].as_signed ())); |
663c44ac | 22933 | break; |
c906108c | 22934 | default: |
d97bc12b | 22935 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22936 | die->attrs[i].form); |
d97bc12b | 22937 | break; |
c906108c | 22938 | } |
d97bc12b | 22939 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22940 | } |
22941 | } | |
22942 | ||
f9aca02d | 22943 | static void |
d97bc12b | 22944 | dump_die_for_error (struct die_info *die) |
c906108c | 22945 | { |
d97bc12b DE |
22946 | dump_die_shallow (gdb_stderr, 0, die); |
22947 | } | |
22948 | ||
22949 | static void | |
22950 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22951 | { | |
22952 | int indent = level * 4; | |
22953 | ||
22954 | gdb_assert (die != NULL); | |
22955 | ||
22956 | if (level >= max_level) | |
22957 | return; | |
22958 | ||
22959 | dump_die_shallow (f, indent, die); | |
22960 | ||
22961 | if (die->child != NULL) | |
c906108c | 22962 | { |
d97bc12b DE |
22963 | print_spaces (indent, f); |
22964 | fprintf_unfiltered (f, " Children:"); | |
22965 | if (level + 1 < max_level) | |
22966 | { | |
22967 | fprintf_unfiltered (f, "\n"); | |
22968 | dump_die_1 (f, level + 1, max_level, die->child); | |
22969 | } | |
22970 | else | |
22971 | { | |
3e43a32a MS |
22972 | fprintf_unfiltered (f, |
22973 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22974 | } |
22975 | } | |
22976 | ||
22977 | if (die->sibling != NULL && level > 0) | |
22978 | { | |
22979 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22980 | } |
22981 | } | |
22982 | ||
d97bc12b DE |
22983 | /* This is called from the pdie macro in gdbinit.in. |
22984 | It's not static so gcc will keep a copy callable from gdb. */ | |
22985 | ||
22986 | void | |
22987 | dump_die (struct die_info *die, int max_level) | |
22988 | { | |
22989 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22990 | } | |
22991 | ||
f9aca02d | 22992 | static void |
51545339 | 22993 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22994 | { |
51545339 | 22995 | void **slot; |
c906108c | 22996 | |
9c541725 PA |
22997 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22998 | to_underlying (die->sect_off), | |
b64f50a1 | 22999 | INSERT); |
51545339 DJ |
23000 | |
23001 | *slot = die; | |
c906108c SS |
23002 | } |
23003 | ||
348e048f DE |
23004 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
23005 | On entry *REF_CU is the CU of SRC_DIE. | |
23006 | On exit *REF_CU is the CU of the result. */ | |
23007 | ||
23008 | static struct die_info * | |
ff39bb5e | 23009 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
23010 | struct dwarf2_cu **ref_cu) |
23011 | { | |
23012 | struct die_info *die; | |
23013 | ||
cd6c91b4 | 23014 | if (attr->form_is_ref ()) |
348e048f | 23015 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 23016 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
23017 | die = follow_die_sig (src_die, attr, ref_cu); |
23018 | else | |
23019 | { | |
23020 | dump_die_for_error (src_die); | |
23021 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
5e22e966 | 23022 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
348e048f DE |
23023 | } |
23024 | ||
23025 | return die; | |
03dd20cc DJ |
23026 | } |
23027 | ||
5c631832 | 23028 | /* Follow reference OFFSET. |
673bfd45 DE |
23029 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
23030 | On exit *REF_CU is the CU of the result. | |
23031 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 23032 | |
f9aca02d | 23033 | static struct die_info * |
9c541725 | 23034 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 23035 | struct dwarf2_cu **ref_cu) |
c906108c | 23036 | { |
10b3939b | 23037 | struct die_info temp_die; |
f2f0e013 | 23038 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
976ca316 | 23039 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
10b3939b | 23040 | |
348e048f DE |
23041 | gdb_assert (cu->per_cu != NULL); |
23042 | ||
98bfdba5 PA |
23043 | target_cu = cu; |
23044 | ||
17e593e9 SM |
23045 | dwarf_read_debug_printf_v ("source CU offset: %s, target offset: %s, " |
23046 | "source CU contains target offset: %d", | |
23047 | sect_offset_str (cu->per_cu->sect_off), | |
23048 | sect_offset_str (sect_off), | |
23049 | cu->header.offset_in_cu_p (sect_off)); | |
23050 | ||
3019eac3 | 23051 | if (cu->per_cu->is_debug_types) |
348e048f DE |
23052 | { |
23053 | /* .debug_types CUs cannot reference anything outside their CU. | |
23054 | If they need to, they have to reference a signatured type via | |
55f1336d | 23055 | DW_FORM_ref_sig8. */ |
4057dfde | 23056 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 23057 | return NULL; |
348e048f | 23058 | } |
36586728 | 23059 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 23060 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
23061 | { |
23062 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 23063 | |
9c541725 | 23064 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
976ca316 | 23065 | per_objfile); |
03dd20cc | 23066 | |
17e593e9 SM |
23067 | dwarf_read_debug_printf_v ("target CU offset: %s, " |
23068 | "target CU DIEs loaded: %d", | |
23069 | sect_offset_str (per_cu->sect_off), | |
23070 | per_objfile->get_cu (per_cu) != nullptr); | |
23071 | ||
616c069a SM |
23072 | /* If necessary, add it to the queue and load its DIEs. |
23073 | ||
23074 | Even if maybe_queue_comp_unit doesn't require us to load the CU's DIEs, | |
23075 | it doesn't mean they are currently loaded. Since we require them | |
23076 | to be loaded, we must check for ourselves. */ | |
23077 | if (maybe_queue_comp_unit (cu, per_cu, per_objfile, cu->language) | |
23078 | || per_objfile->get_cu (per_cu) == nullptr) | |
4a636814 SM |
23079 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
23080 | false, cu->language); | |
03dd20cc | 23081 | |
976ca316 | 23082 | target_cu = per_objfile->get_cu (per_cu); |
616c069a | 23083 | gdb_assert (target_cu != nullptr); |
10b3939b | 23084 | } |
98bfdba5 PA |
23085 | else if (cu->dies == NULL) |
23086 | { | |
23087 | /* We're loading full DIEs during partial symbol reading. */ | |
976ca316 | 23088 | gdb_assert (per_objfile->per_bfd->reading_partial_symbols); |
4a636814 SM |
23089 | load_full_comp_unit (cu->per_cu, per_objfile, cu, false, |
23090 | language_minimal); | |
98bfdba5 | 23091 | } |
c906108c | 23092 | |
f2f0e013 | 23093 | *ref_cu = target_cu; |
9c541725 | 23094 | temp_die.sect_off = sect_off; |
c24bdb02 | 23095 | |
3db19b2d TV |
23096 | if (target_cu != cu) |
23097 | target_cu->ancestor = cu; | |
23098 | ||
9a3c8263 | 23099 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
23100 | &temp_die, |
23101 | to_underlying (sect_off)); | |
5c631832 | 23102 | } |
10b3939b | 23103 | |
5c631832 JK |
23104 | /* Follow reference attribute ATTR of SRC_DIE. |
23105 | On entry *REF_CU is the CU of SRC_DIE. | |
23106 | On exit *REF_CU is the CU of the result. */ | |
23107 | ||
23108 | static struct die_info * | |
ff39bb5e | 23109 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
23110 | struct dwarf2_cu **ref_cu) |
23111 | { | |
0826b30a | 23112 | sect_offset sect_off = attr->get_ref_die_offset (); |
5c631832 JK |
23113 | struct dwarf2_cu *cu = *ref_cu; |
23114 | struct die_info *die; | |
23115 | ||
9c541725 | 23116 | die = follow_die_offset (sect_off, |
36586728 TT |
23117 | (attr->form == DW_FORM_GNU_ref_alt |
23118 | || cu->per_cu->is_dwz), | |
23119 | ref_cu); | |
5c631832 | 23120 | if (!die) |
9d8780f0 SM |
23121 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
23122 | "at %s [in module %s]"), | |
23123 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23124 | objfile_name (cu->per_objfile->objfile)); |
348e048f | 23125 | |
5c631832 JK |
23126 | return die; |
23127 | } | |
23128 | ||
d4c9a4f8 | 23129 | /* See read.h. */ |
5c631832 JK |
23130 | |
23131 | struct dwarf2_locexpr_baton | |
9c541725 | 23132 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 23133 | dwarf2_per_cu_data *per_cu, |
976ca316 | 23134 | dwarf2_per_objfile *per_objfile, |
041d9819 SM |
23135 | gdb::function_view<CORE_ADDR ()> get_frame_pc, |
23136 | bool resolve_abstract_p) | |
5c631832 | 23137 | { |
5c631832 JK |
23138 | struct die_info *die; |
23139 | struct attribute *attr; | |
23140 | struct dwarf2_locexpr_baton retval; | |
976ca316 | 23141 | struct objfile *objfile = per_objfile->objfile; |
8cf6f0b1 | 23142 | |
976ca316 | 23143 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 | 23144 | if (cu == nullptr) |
976ca316 | 23145 | cu = load_cu (per_cu, per_objfile, false); |
1b555f17 SM |
23146 | |
23147 | if (cu == nullptr) | |
cc12ce38 DE |
23148 | { |
23149 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23150 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23151 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23152 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23153 | } |
918dd910 | 23154 | |
9c541725 | 23155 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 23156 | if (!die) |
9d8780f0 SM |
23157 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23158 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
23159 | |
23160 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 23161 | if (!attr && resolve_abstract_p |
976ca316 SM |
23162 | && (per_objfile->per_bfd->abstract_to_concrete.find (die->sect_off) |
23163 | != per_objfile->per_bfd->abstract_to_concrete.end ())) | |
e4a62c65 | 23164 | { |
041d9819 | 23165 | CORE_ADDR pc = get_frame_pc (); |
b3b3bada | 23166 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
08feed99 | 23167 | struct gdbarch *gdbarch = objfile->arch (); |
e4a62c65 | 23168 | |
3360b6e7 | 23169 | for (const auto &cand_off |
976ca316 | 23170 | : per_objfile->per_bfd->abstract_to_concrete[die->sect_off]) |
e4a62c65 | 23171 | { |
3360b6e7 TV |
23172 | struct dwarf2_cu *cand_cu = cu; |
23173 | struct die_info *cand | |
23174 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
23175 | if (!cand | |
23176 | || !cand->parent | |
e4a62c65 TV |
23177 | || cand->parent->tag != DW_TAG_subprogram) |
23178 | continue; | |
23179 | ||
23180 | CORE_ADDR pc_low, pc_high; | |
23181 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
23182 | if (pc_low == ((CORE_ADDR) -1)) |
23183 | continue; | |
23184 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
23185 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
23186 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
23187 | continue; |
23188 | ||
23189 | die = cand; | |
23190 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
23191 | break; | |
23192 | } | |
23193 | } | |
23194 | ||
5c631832 JK |
23195 | if (!attr) |
23196 | { | |
e103e986 JK |
23197 | /* DWARF: "If there is no such attribute, then there is no effect.". |
23198 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 23199 | |
e103e986 | 23200 | retval.data = NULL; |
5c631832 JK |
23201 | retval.size = 0; |
23202 | } | |
cd6c91b4 | 23203 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
23204 | { |
23205 | struct dwarf2_loclist_baton loclist_baton; | |
041d9819 | 23206 | CORE_ADDR pc = get_frame_pc (); |
8cf6f0b1 TT |
23207 | size_t size; |
23208 | ||
23209 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
23210 | ||
23211 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
23212 | &size, pc); | |
23213 | retval.size = size; | |
23214 | } | |
5c631832 JK |
23215 | else |
23216 | { | |
4fc6c0d5 | 23217 | if (!attr->form_is_block ()) |
9d8780f0 | 23218 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 23219 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 23220 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 | 23221 | |
9d2246fc TT |
23222 | struct dwarf_block *block = attr->as_block (); |
23223 | retval.data = block->data; | |
23224 | retval.size = block->size; | |
5c631832 | 23225 | } |
976ca316 | 23226 | retval.per_objfile = per_objfile; |
5c631832 | 23227 | retval.per_cu = cu->per_cu; |
918dd910 | 23228 | |
976ca316 | 23229 | per_objfile->age_comp_units (); |
918dd910 | 23230 | |
5c631832 | 23231 | return retval; |
348e048f DE |
23232 | } |
23233 | ||
d4c9a4f8 | 23234 | /* See read.h. */ |
8b9737bf TT |
23235 | |
23236 | struct dwarf2_locexpr_baton | |
23237 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 23238 | dwarf2_per_cu_data *per_cu, |
14095eb3 | 23239 | dwarf2_per_objfile *per_objfile, |
041d9819 | 23240 | gdb::function_view<CORE_ADDR ()> get_frame_pc) |
8b9737bf | 23241 | { |
9c541725 | 23242 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 23243 | |
14095eb3 | 23244 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, per_objfile, |
041d9819 | 23245 | get_frame_pc); |
8b9737bf TT |
23246 | } |
23247 | ||
b6807d98 TT |
23248 | /* Write a constant of a given type as target-ordered bytes into |
23249 | OBSTACK. */ | |
23250 | ||
23251 | static const gdb_byte * | |
23252 | write_constant_as_bytes (struct obstack *obstack, | |
23253 | enum bfd_endian byte_order, | |
23254 | struct type *type, | |
23255 | ULONGEST value, | |
23256 | LONGEST *len) | |
23257 | { | |
23258 | gdb_byte *result; | |
23259 | ||
23260 | *len = TYPE_LENGTH (type); | |
224c3ddb | 23261 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23262 | store_unsigned_integer (result, *len, byte_order, value); |
23263 | ||
23264 | return result; | |
23265 | } | |
23266 | ||
d4c9a4f8 | 23267 | /* See read.h. */ |
b6807d98 TT |
23268 | |
23269 | const gdb_byte * | |
9c541725 | 23270 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 | 23271 | dwarf2_per_cu_data *per_cu, |
14095eb3 | 23272 | dwarf2_per_objfile *per_objfile, |
d4c9a4f8 | 23273 | obstack *obstack, |
b6807d98 TT |
23274 | LONGEST *len) |
23275 | { | |
b6807d98 TT |
23276 | struct die_info *die; |
23277 | struct attribute *attr; | |
23278 | const gdb_byte *result = NULL; | |
23279 | struct type *type; | |
23280 | LONGEST value; | |
23281 | enum bfd_endian byte_order; | |
14095eb3 | 23282 | struct objfile *objfile = per_objfile->objfile; |
b6807d98 | 23283 | |
7188ed02 | 23284 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 SM |
23285 | if (cu == nullptr) |
23286 | cu = load_cu (per_cu, per_objfile, false); | |
23287 | ||
23288 | if (cu == nullptr) | |
cc12ce38 DE |
23289 | { |
23290 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23291 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23292 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23293 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23294 | } |
b6807d98 | 23295 | |
9c541725 | 23296 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23297 | if (!die) |
9d8780f0 SM |
23298 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23299 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23300 | |
23301 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23302 | if (attr == NULL) | |
23303 | return NULL; | |
23304 | ||
e3b94546 | 23305 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23306 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23307 | ||
23308 | switch (attr->form) | |
23309 | { | |
23310 | case DW_FORM_addr: | |
336d760d | 23311 | case DW_FORM_addrx: |
b6807d98 TT |
23312 | case DW_FORM_GNU_addr_index: |
23313 | { | |
23314 | gdb_byte *tem; | |
23315 | ||
23316 | *len = cu->header.addr_size; | |
224c3ddb | 23317 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
36d378cf | 23318 | store_unsigned_integer (tem, *len, byte_order, attr->as_address ()); |
b6807d98 TT |
23319 | result = tem; |
23320 | } | |
23321 | break; | |
23322 | case DW_FORM_string: | |
23323 | case DW_FORM_strp: | |
cf532bd1 | 23324 | case DW_FORM_strx: |
b6807d98 TT |
23325 | case DW_FORM_GNU_str_index: |
23326 | case DW_FORM_GNU_strp_alt: | |
c6481205 | 23327 | /* The string is already allocated on the objfile obstack, point |
b6807d98 | 23328 | directly to it. */ |
2c830f54 TT |
23329 | { |
23330 | const char *attr_name = attr->as_string (); | |
23331 | result = (const gdb_byte *) attr_name; | |
23332 | *len = strlen (attr_name); | |
23333 | } | |
b6807d98 TT |
23334 | break; |
23335 | case DW_FORM_block1: | |
23336 | case DW_FORM_block2: | |
23337 | case DW_FORM_block4: | |
23338 | case DW_FORM_block: | |
23339 | case DW_FORM_exprloc: | |
0224619f | 23340 | case DW_FORM_data16: |
9d2246fc TT |
23341 | { |
23342 | struct dwarf_block *block = attr->as_block (); | |
23343 | result = block->data; | |
23344 | *len = block->size; | |
23345 | } | |
b6807d98 TT |
23346 | break; |
23347 | ||
23348 | /* The DW_AT_const_value attributes are supposed to carry the | |
23349 | symbol's value "represented as it would be on the target | |
23350 | architecture." By the time we get here, it's already been | |
23351 | converted to host endianness, so we just need to sign- or | |
23352 | zero-extend it as appropriate. */ | |
23353 | case DW_FORM_data1: | |
23354 | type = die_type (die, cu); | |
23355 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23356 | if (result == NULL) | |
23357 | result = write_constant_as_bytes (obstack, byte_order, | |
23358 | type, value, len); | |
23359 | break; | |
23360 | case DW_FORM_data2: | |
23361 | type = die_type (die, cu); | |
23362 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23363 | if (result == NULL) | |
23364 | result = write_constant_as_bytes (obstack, byte_order, | |
23365 | type, value, len); | |
23366 | break; | |
23367 | case DW_FORM_data4: | |
23368 | type = die_type (die, cu); | |
23369 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23370 | if (result == NULL) | |
23371 | result = write_constant_as_bytes (obstack, byte_order, | |
23372 | type, value, len); | |
23373 | break; | |
23374 | case DW_FORM_data8: | |
23375 | type = die_type (die, cu); | |
23376 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23377 | if (result == NULL) | |
23378 | result = write_constant_as_bytes (obstack, byte_order, | |
23379 | type, value, len); | |
23380 | break; | |
23381 | ||
23382 | case DW_FORM_sdata: | |
663c44ac | 23383 | case DW_FORM_implicit_const: |
b6807d98 TT |
23384 | type = die_type (die, cu); |
23385 | result = write_constant_as_bytes (obstack, byte_order, | |
1bc397c5 | 23386 | type, attr->as_signed (), len); |
b6807d98 TT |
23387 | break; |
23388 | ||
23389 | case DW_FORM_udata: | |
23390 | type = die_type (die, cu); | |
23391 | result = write_constant_as_bytes (obstack, byte_order, | |
529908cb | 23392 | type, attr->as_unsigned (), len); |
b6807d98 TT |
23393 | break; |
23394 | ||
23395 | default: | |
b98664d3 | 23396 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23397 | dwarf_form_name (attr->form)); |
23398 | break; | |
23399 | } | |
23400 | ||
23401 | return result; | |
23402 | } | |
23403 | ||
d4c9a4f8 | 23404 | /* See read.h. */ |
7942e96e AA |
23405 | |
23406 | struct type * | |
9c541725 | 23407 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
14095eb3 SM |
23408 | dwarf2_per_cu_data *per_cu, |
23409 | dwarf2_per_objfile *per_objfile) | |
7942e96e | 23410 | { |
7942e96e AA |
23411 | struct die_info *die; |
23412 | ||
7188ed02 | 23413 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 SM |
23414 | if (cu == nullptr) |
23415 | cu = load_cu (per_cu, per_objfile, false); | |
23416 | ||
23417 | if (cu == nullptr) | |
23418 | return nullptr; | |
7942e96e | 23419 | |
9c541725 | 23420 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23421 | if (!die) |
23422 | return NULL; | |
23423 | ||
23424 | return die_type (die, cu); | |
23425 | } | |
23426 | ||
8cb5117c | 23427 | /* See read.h. */ |
8a9b8146 TT |
23428 | |
23429 | struct type * | |
b64f50a1 | 23430 | dwarf2_get_die_type (cu_offset die_offset, |
aa66c379 SM |
23431 | dwarf2_per_cu_data *per_cu, |
23432 | dwarf2_per_objfile *per_objfile) | |
8a9b8146 | 23433 | { |
9c541725 | 23434 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
aa66c379 | 23435 | return get_die_type_at_offset (die_offset_sect, per_cu, per_objfile); |
8a9b8146 TT |
23436 | } |
23437 | ||
ac9ec31b | 23438 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23439 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23440 | On exit *REF_CU is the CU of the result. |
23441 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23442 | |
23443 | static struct die_info * | |
ac9ec31b DE |
23444 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23445 | struct dwarf2_cu **ref_cu) | |
348e048f | 23446 | { |
348e048f | 23447 | struct die_info temp_die; |
3db19b2d | 23448 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f | 23449 | struct die_info *die; |
976ca316 | 23450 | dwarf2_per_objfile *per_objfile = (*ref_cu)->per_objfile; |
120ce1b5 | 23451 | |
348e048f | 23452 | |
ac9ec31b DE |
23453 | /* While it might be nice to assert sig_type->type == NULL here, |
23454 | we can get here for DW_AT_imported_declaration where we need | |
23455 | the DIE not the type. */ | |
348e048f | 23456 | |
616c069a | 23457 | /* If necessary, add it to the queue and load its DIEs. |
348e048f | 23458 | |
616c069a SM |
23459 | Even if maybe_queue_comp_unit doesn't require us to load the CU's DIEs, |
23460 | it doesn't mean they are currently loaded. Since we require them | |
23461 | to be loaded, we must check for ourselves. */ | |
0d305d5c | 23462 | if (maybe_queue_comp_unit (*ref_cu, sig_type, per_objfile, |
616c069a | 23463 | language_minimal) |
0d305d5c | 23464 | || per_objfile->get_cu (sig_type) == nullptr) |
976ca316 | 23465 | read_signatured_type (sig_type, per_objfile); |
348e048f | 23466 | |
0d305d5c | 23467 | sig_cu = per_objfile->get_cu (sig_type); |
69d751e3 | 23468 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23469 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23470 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23471 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23472 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23473 | if (die) |
23474 | { | |
796a7ff8 DE |
23475 | /* For .gdb_index version 7 keep track of included TUs. |
23476 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
976ca316 SM |
23477 | if (per_objfile->per_bfd->index_table != NULL |
23478 | && per_objfile->per_bfd->index_table->version <= 7) | |
796a7ff8 | 23479 | { |
ae640021 | 23480 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
23481 | } |
23482 | ||
348e048f | 23483 | *ref_cu = sig_cu; |
3db19b2d TV |
23484 | if (sig_cu != cu) |
23485 | sig_cu->ancestor = cu; | |
c24bdb02 | 23486 | |
348e048f DE |
23487 | return die; |
23488 | } | |
23489 | ||
ac9ec31b DE |
23490 | return NULL; |
23491 | } | |
23492 | ||
23493 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23494 | On entry *REF_CU is the CU of SRC_DIE. | |
23495 | On exit *REF_CU is the CU of the result. | |
23496 | The result is the DIE of the type. | |
23497 | If the referenced type cannot be found an error is thrown. */ | |
23498 | ||
23499 | static struct die_info * | |
ff39bb5e | 23500 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23501 | struct dwarf2_cu **ref_cu) |
23502 | { | |
630ed6b9 | 23503 | ULONGEST signature = attr->as_signature (); |
ac9ec31b DE |
23504 | struct signatured_type *sig_type; |
23505 | struct die_info *die; | |
23506 | ||
23507 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23508 | ||
a2ce51a0 | 23509 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23510 | /* sig_type will be NULL if the signatured type is missing from |
23511 | the debug info. */ | |
23512 | if (sig_type == NULL) | |
23513 | { | |
23514 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
dda83cd7 SM |
23515 | " from DIE at %s [in module %s]"), |
23516 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23517 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
ac9ec31b DE |
23518 | } |
23519 | ||
23520 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23521 | if (die == NULL) | |
23522 | { | |
23523 | dump_die_for_error (src_die); | |
23524 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23525 | " from DIE at %s [in module %s]"), |
23526 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23527 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
ac9ec31b DE |
23528 | } |
23529 | ||
23530 | return die; | |
23531 | } | |
23532 | ||
23533 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23534 | reading in and processing the type unit if necessary. */ | |
23535 | ||
23536 | static struct type * | |
23537 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23538 | struct dwarf2_cu *cu) | |
23539 | { | |
976ca316 | 23540 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ac9ec31b DE |
23541 | struct signatured_type *sig_type; |
23542 | struct dwarf2_cu *type_cu; | |
23543 | struct die_info *type_die; | |
23544 | struct type *type; | |
23545 | ||
a2ce51a0 | 23546 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23547 | /* sig_type will be NULL if the signatured type is missing from |
23548 | the debug info. */ | |
23549 | if (sig_type == NULL) | |
23550 | { | |
b98664d3 | 23551 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23552 | " from DIE at %s [in module %s]"), |
23553 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23554 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23555 | return build_error_marker_type (cu, die); |
23556 | } | |
23557 | ||
23558 | /* If we already know the type we're done. */ | |
976ca316 | 23559 | type = per_objfile->get_type_for_signatured_type (sig_type); |
e286671b TT |
23560 | if (type != nullptr) |
23561 | return type; | |
ac9ec31b DE |
23562 | |
23563 | type_cu = cu; | |
23564 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23565 | if (type_die != NULL) | |
23566 | { | |
23567 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23568 | is created. This is important, for example, because for c++ classes | |
23569 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23570 | type = read_type_die (type_die, type_cu); | |
23571 | if (type == NULL) | |
23572 | { | |
b98664d3 | 23573 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
23574 | " referenced from DIE at %s [in module %s]"), |
23575 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23576 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23577 | type = build_error_marker_type (cu, die); |
23578 | } | |
23579 | } | |
23580 | else | |
23581 | { | |
b98664d3 | 23582 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
23583 | " from DIE at %s [in module %s]"), |
23584 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23585 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23586 | type = build_error_marker_type (cu, die); |
23587 | } | |
e286671b | 23588 | |
976ca316 | 23589 | per_objfile->set_type_for_signatured_type (sig_type, type); |
ac9ec31b DE |
23590 | |
23591 | return type; | |
23592 | } | |
23593 | ||
23594 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23595 | reading in and processing the type unit if necessary. */ | |
23596 | ||
23597 | static struct type * | |
ff39bb5e | 23598 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23599 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23600 | { |
23601 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 23602 | if (attr->form_is_ref ()) |
ac9ec31b DE |
23603 | { |
23604 | struct dwarf2_cu *type_cu = cu; | |
23605 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23606 | ||
23607 | return read_type_die (type_die, type_cu); | |
23608 | } | |
23609 | else if (attr->form == DW_FORM_ref_sig8) | |
23610 | { | |
630ed6b9 | 23611 | return get_signatured_type (die, attr->as_signature (), cu); |
ac9ec31b DE |
23612 | } |
23613 | else | |
23614 | { | |
976ca316 | 23615 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 23616 | |
b98664d3 | 23617 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
23618 | " at %s [in module %s]"), |
23619 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
976ca316 | 23620 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23621 | return build_error_marker_type (cu, die); |
23622 | } | |
348e048f DE |
23623 | } |
23624 | ||
e5fe5e75 | 23625 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23626 | |
23627 | static void | |
ab432490 SM |
23628 | load_full_type_unit (dwarf2_per_cu_data *per_cu, |
23629 | dwarf2_per_objfile *per_objfile) | |
348e048f | 23630 | { |
52dc124a | 23631 | struct signatured_type *sig_type; |
348e048f | 23632 | |
f4dc4d17 | 23633 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 23634 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 23635 | |
6721b2ec DE |
23636 | /* We have the per_cu, but we need the signatured_type. |
23637 | Fortunately this is an easy translation. */ | |
23638 | gdb_assert (per_cu->is_debug_types); | |
23639 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23640 | |
7188ed02 | 23641 | gdb_assert (per_objfile->get_cu (per_cu) == nullptr); |
348e048f | 23642 | |
ab432490 | 23643 | read_signatured_type (sig_type, per_objfile); |
348e048f | 23644 | |
7188ed02 | 23645 | gdb_assert (per_objfile->get_cu (per_cu) != nullptr); |
348e048f DE |
23646 | } |
23647 | ||
3019eac3 DE |
23648 | /* Read in a signatured type and build its CU and DIEs. |
23649 | If the type is a stub for the real type in a DWO file, | |
23650 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23651 | |
23652 | static void | |
ab432490 SM |
23653 | read_signatured_type (signatured_type *sig_type, |
23654 | dwarf2_per_objfile *per_objfile) | |
dee91e82 | 23655 | { |
0d305d5c TT |
23656 | gdb_assert (sig_type->is_debug_types); |
23657 | gdb_assert (per_objfile->get_cu (sig_type) == nullptr); | |
348e048f | 23658 | |
0d305d5c | 23659 | cutu_reader reader (sig_type, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
23660 | |
23661 | if (!reader.dummy_p) | |
23662 | { | |
23663 | struct dwarf2_cu *cu = reader.cu; | |
23664 | const gdb_byte *info_ptr = reader.info_ptr; | |
23665 | ||
23666 | gdb_assert (cu->die_hash == NULL); | |
23667 | cu->die_hash = | |
23668 | htab_create_alloc_ex (cu->header.length / 12, | |
23669 | die_hash, | |
23670 | die_eq, | |
23671 | NULL, | |
23672 | &cu->comp_unit_obstack, | |
23673 | hashtab_obstack_allocate, | |
23674 | dummy_obstack_deallocate); | |
23675 | ||
3e225074 | 23676 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
23677 | reader.comp_unit_die->child |
23678 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
23679 | reader.comp_unit_die); | |
23680 | cu->dies = reader.comp_unit_die; | |
23681 | /* comp_unit_die is not stored in die_hash, no need. */ | |
23682 | ||
23683 | /* We try not to read any attributes in this function, because | |
23684 | not all CUs needed for references have been loaded yet, and | |
23685 | symbol table processing isn't initialized. But we have to | |
23686 | set the CU language, or we won't be able to build types | |
23687 | correctly. Similarly, if we do not read the producer, we can | |
23688 | not apply producer-specific interpretation. */ | |
23689 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
23690 | |
23691 | reader.keep (); | |
c0ab21c2 TT |
23692 | } |
23693 | ||
0d305d5c | 23694 | sig_type->tu_read = 1; |
c906108c SS |
23695 | } |
23696 | ||
c906108c SS |
23697 | /* Decode simple location descriptions. |
23698 | Given a pointer to a dwarf block that defines a location, compute | |
7d79de9a TT |
23699 | the location and return the value. If COMPUTED is non-null, it is |
23700 | set to true to indicate that decoding was successful, and false | |
23701 | otherwise. If COMPUTED is null, then this function may emit a | |
23702 | complaint. */ | |
c906108c SS |
23703 | |
23704 | static CORE_ADDR | |
7d79de9a | 23705 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu, bool *computed) |
c906108c | 23706 | { |
5e22e966 | 23707 | struct objfile *objfile = cu->per_objfile->objfile; |
56eb65bd SP |
23708 | size_t i; |
23709 | size_t size = blk->size; | |
d521ce57 | 23710 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23711 | CORE_ADDR stack[64]; |
23712 | int stacki; | |
23713 | unsigned int bytes_read, unsnd; | |
23714 | gdb_byte op; | |
c906108c | 23715 | |
7d79de9a TT |
23716 | if (computed != nullptr) |
23717 | *computed = false; | |
23718 | ||
21ae7a4d JK |
23719 | i = 0; |
23720 | stacki = 0; | |
23721 | stack[stacki] = 0; | |
23722 | stack[++stacki] = 0; | |
23723 | ||
23724 | while (i < size) | |
23725 | { | |
23726 | op = data[i++]; | |
23727 | switch (op) | |
23728 | { | |
23729 | case DW_OP_lit0: | |
23730 | case DW_OP_lit1: | |
23731 | case DW_OP_lit2: | |
23732 | case DW_OP_lit3: | |
23733 | case DW_OP_lit4: | |
23734 | case DW_OP_lit5: | |
23735 | case DW_OP_lit6: | |
23736 | case DW_OP_lit7: | |
23737 | case DW_OP_lit8: | |
23738 | case DW_OP_lit9: | |
23739 | case DW_OP_lit10: | |
23740 | case DW_OP_lit11: | |
23741 | case DW_OP_lit12: | |
23742 | case DW_OP_lit13: | |
23743 | case DW_OP_lit14: | |
23744 | case DW_OP_lit15: | |
23745 | case DW_OP_lit16: | |
23746 | case DW_OP_lit17: | |
23747 | case DW_OP_lit18: | |
23748 | case DW_OP_lit19: | |
23749 | case DW_OP_lit20: | |
23750 | case DW_OP_lit21: | |
23751 | case DW_OP_lit22: | |
23752 | case DW_OP_lit23: | |
23753 | case DW_OP_lit24: | |
23754 | case DW_OP_lit25: | |
23755 | case DW_OP_lit26: | |
23756 | case DW_OP_lit27: | |
23757 | case DW_OP_lit28: | |
23758 | case DW_OP_lit29: | |
23759 | case DW_OP_lit30: | |
23760 | case DW_OP_lit31: | |
23761 | stack[++stacki] = op - DW_OP_lit0; | |
23762 | break; | |
f1bea926 | 23763 | |
21ae7a4d JK |
23764 | case DW_OP_reg0: |
23765 | case DW_OP_reg1: | |
23766 | case DW_OP_reg2: | |
23767 | case DW_OP_reg3: | |
23768 | case DW_OP_reg4: | |
23769 | case DW_OP_reg5: | |
23770 | case DW_OP_reg6: | |
23771 | case DW_OP_reg7: | |
23772 | case DW_OP_reg8: | |
23773 | case DW_OP_reg9: | |
23774 | case DW_OP_reg10: | |
23775 | case DW_OP_reg11: | |
23776 | case DW_OP_reg12: | |
23777 | case DW_OP_reg13: | |
23778 | case DW_OP_reg14: | |
23779 | case DW_OP_reg15: | |
23780 | case DW_OP_reg16: | |
23781 | case DW_OP_reg17: | |
23782 | case DW_OP_reg18: | |
23783 | case DW_OP_reg19: | |
23784 | case DW_OP_reg20: | |
23785 | case DW_OP_reg21: | |
23786 | case DW_OP_reg22: | |
23787 | case DW_OP_reg23: | |
23788 | case DW_OP_reg24: | |
23789 | case DW_OP_reg25: | |
23790 | case DW_OP_reg26: | |
23791 | case DW_OP_reg27: | |
23792 | case DW_OP_reg28: | |
23793 | case DW_OP_reg29: | |
23794 | case DW_OP_reg30: | |
23795 | case DW_OP_reg31: | |
23796 | stack[++stacki] = op - DW_OP_reg0; | |
23797 | if (i < size) | |
7d79de9a TT |
23798 | { |
23799 | if (computed == nullptr) | |
23800 | dwarf2_complex_location_expr_complaint (); | |
23801 | else | |
23802 | return 0; | |
23803 | } | |
21ae7a4d | 23804 | break; |
c906108c | 23805 | |
21ae7a4d JK |
23806 | case DW_OP_regx: |
23807 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
23808 | i += bytes_read; | |
23809 | stack[++stacki] = unsnd; | |
23810 | if (i < size) | |
7d79de9a TT |
23811 | { |
23812 | if (computed == nullptr) | |
23813 | dwarf2_complex_location_expr_complaint (); | |
23814 | else | |
23815 | return 0; | |
23816 | } | |
21ae7a4d | 23817 | break; |
c906108c | 23818 | |
21ae7a4d | 23819 | case DW_OP_addr: |
c8a7a66f TT |
23820 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
23821 | &bytes_read); | |
21ae7a4d JK |
23822 | i += bytes_read; |
23823 | break; | |
d53d4ac5 | 23824 | |
21ae7a4d JK |
23825 | case DW_OP_const1u: |
23826 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
23827 | i += 1; | |
23828 | break; | |
23829 | ||
23830 | case DW_OP_const1s: | |
23831 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
23832 | i += 1; | |
23833 | break; | |
23834 | ||
23835 | case DW_OP_const2u: | |
23836 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
23837 | i += 2; | |
23838 | break; | |
23839 | ||
23840 | case DW_OP_const2s: | |
23841 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
23842 | i += 2; | |
23843 | break; | |
d53d4ac5 | 23844 | |
21ae7a4d JK |
23845 | case DW_OP_const4u: |
23846 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
23847 | i += 4; | |
23848 | break; | |
23849 | ||
23850 | case DW_OP_const4s: | |
23851 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
23852 | i += 4; | |
23853 | break; | |
23854 | ||
585861ea JK |
23855 | case DW_OP_const8u: |
23856 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
23857 | i += 8; | |
23858 | break; | |
23859 | ||
21ae7a4d JK |
23860 | case DW_OP_constu: |
23861 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
23862 | &bytes_read); | |
23863 | i += bytes_read; | |
23864 | break; | |
23865 | ||
23866 | case DW_OP_consts: | |
23867 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
23868 | i += bytes_read; | |
23869 | break; | |
23870 | ||
23871 | case DW_OP_dup: | |
23872 | stack[stacki + 1] = stack[stacki]; | |
23873 | stacki++; | |
23874 | break; | |
23875 | ||
23876 | case DW_OP_plus: | |
23877 | stack[stacki - 1] += stack[stacki]; | |
23878 | stacki--; | |
23879 | break; | |
23880 | ||
23881 | case DW_OP_plus_uconst: | |
23882 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
23883 | &bytes_read); | |
23884 | i += bytes_read; | |
23885 | break; | |
23886 | ||
23887 | case DW_OP_minus: | |
23888 | stack[stacki - 1] -= stack[stacki]; | |
23889 | stacki--; | |
23890 | break; | |
23891 | ||
23892 | case DW_OP_deref: | |
23893 | /* If we're not the last op, then we definitely can't encode | |
23894 | this using GDB's address_class enum. This is valid for partial | |
23895 | global symbols, although the variable's address will be bogus | |
23896 | in the psymtab. */ | |
23897 | if (i < size) | |
7d79de9a TT |
23898 | { |
23899 | if (computed == nullptr) | |
23900 | dwarf2_complex_location_expr_complaint (); | |
23901 | else | |
23902 | return 0; | |
23903 | } | |
21ae7a4d JK |
23904 | break; |
23905 | ||
dda83cd7 | 23906 | case DW_OP_GNU_push_tls_address: |
4aa4e28b | 23907 | case DW_OP_form_tls_address: |
21ae7a4d JK |
23908 | /* The top of the stack has the offset from the beginning |
23909 | of the thread control block at which the variable is located. */ | |
23910 | /* Nothing should follow this operator, so the top of stack would | |
23911 | be returned. */ | |
23912 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23913 | address will be bogus in the psymtab. Make it always at least |
23914 | non-zero to not look as a variable garbage collected by linker | |
23915 | which have DW_OP_addr 0. */ | |
21ae7a4d | 23916 | if (i < size) |
7d79de9a TT |
23917 | { |
23918 | if (computed == nullptr) | |
23919 | dwarf2_complex_location_expr_complaint (); | |
23920 | else | |
23921 | return 0; | |
23922 | } | |
585861ea | 23923 | stack[stacki]++; |
dda83cd7 | 23924 | break; |
21ae7a4d JK |
23925 | |
23926 | case DW_OP_GNU_uninit: | |
7d79de9a TT |
23927 | if (computed != nullptr) |
23928 | return 0; | |
21ae7a4d JK |
23929 | break; |
23930 | ||
336d760d | 23931 | case DW_OP_addrx: |
3019eac3 | 23932 | case DW_OP_GNU_addr_index: |
49f6c839 | 23933 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23934 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23935 | &bytes_read); | |
23936 | i += bytes_read; | |
23937 | break; | |
23938 | ||
21ae7a4d | 23939 | default: |
7d79de9a TT |
23940 | if (computed == nullptr) |
23941 | { | |
23942 | const char *name = get_DW_OP_name (op); | |
21ae7a4d | 23943 | |
7d79de9a TT |
23944 | if (name) |
23945 | complaint (_("unsupported stack op: '%s'"), | |
23946 | name); | |
23947 | else | |
23948 | complaint (_("unsupported stack op: '%02x'"), | |
23949 | op); | |
23950 | } | |
21ae7a4d JK |
23951 | |
23952 | return (stack[stacki]); | |
d53d4ac5 | 23953 | } |
3c6e0cb3 | 23954 | |
21ae7a4d | 23955 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
dda83cd7 | 23956 | outside of the allocated space. Also enforce minimum>0. */ |
21ae7a4d JK |
23957 | if (stacki >= ARRAY_SIZE (stack) - 1) |
23958 | { | |
7d79de9a TT |
23959 | if (computed == nullptr) |
23960 | complaint (_("location description stack overflow")); | |
21ae7a4d JK |
23961 | return 0; |
23962 | } | |
23963 | ||
23964 | if (stacki <= 0) | |
23965 | { | |
7d79de9a TT |
23966 | if (computed == nullptr) |
23967 | complaint (_("location description stack underflow")); | |
21ae7a4d JK |
23968 | return 0; |
23969 | } | |
23970 | } | |
7d79de9a TT |
23971 | |
23972 | if (computed != nullptr) | |
23973 | *computed = true; | |
21ae7a4d | 23974 | return (stack[stacki]); |
c906108c SS |
23975 | } |
23976 | ||
23977 | /* memory allocation interface */ | |
23978 | ||
c906108c | 23979 | static struct dwarf_block * |
7b5a2f43 | 23980 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23981 | { |
8d749320 | 23982 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23983 | } |
23984 | ||
c906108c | 23985 | static struct die_info * |
b60c80d6 | 23986 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23987 | { |
23988 | struct die_info *die; | |
b60c80d6 DJ |
23989 | size_t size = sizeof (struct die_info); |
23990 | ||
23991 | if (num_attrs > 1) | |
23992 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23993 | |
b60c80d6 | 23994 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23995 | memset (die, 0, sizeof (struct die_info)); |
23996 | return (die); | |
23997 | } | |
2e276125 JB |
23998 | |
23999 | \f | |
a036ba48 | 24000 | |
c90ec28a | 24001 | /* Macro support. */ |
cf2c3c16 | 24002 | |
9eac9650 TT |
24003 | /* An overload of dwarf_decode_macros that finds the correct section |
24004 | and ensures it is read in before calling the other overload. */ | |
24005 | ||
24006 | static void | |
24007 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, | |
24008 | int section_is_gnu) | |
24009 | { | |
976ca316 SM |
24010 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
24011 | struct objfile *objfile = per_objfile->objfile; | |
5a0e026f | 24012 | const struct line_header *lh = cu->line_header; |
9eac9650 TT |
24013 | unsigned int offset_size = cu->header.offset_size; |
24014 | struct dwarf2_section_info *section; | |
24015 | const char *section_name; | |
24016 | ||
24017 | if (cu->dwo_unit != nullptr) | |
24018 | { | |
24019 | if (section_is_gnu) | |
24020 | { | |
24021 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24022 | section_name = ".debug_macro.dwo"; | |
24023 | } | |
24024 | else | |
24025 | { | |
24026 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24027 | section_name = ".debug_macinfo.dwo"; | |
24028 | } | |
24029 | } | |
24030 | else | |
24031 | { | |
24032 | if (section_is_gnu) | |
24033 | { | |
976ca316 | 24034 | section = &per_objfile->per_bfd->macro; |
9eac9650 TT |
24035 | section_name = ".debug_macro"; |
24036 | } | |
24037 | else | |
24038 | { | |
976ca316 | 24039 | section = &per_objfile->per_bfd->macinfo; |
9eac9650 TT |
24040 | section_name = ".debug_macinfo"; |
24041 | } | |
24042 | } | |
24043 | ||
24044 | section->read (objfile); | |
24045 | if (section->buffer == nullptr) | |
24046 | { | |
24047 | complaint (_("missing %s section"), section_name); | |
24048 | return; | |
24049 | } | |
24050 | ||
24051 | buildsym_compunit *builder = cu->get_builder (); | |
24052 | ||
048fde1e | 24053 | struct dwarf2_section_info *str_offsets_section; |
24054 | struct dwarf2_section_info *str_section; | |
24055 | ULONGEST str_offsets_base; | |
24056 | ||
24057 | if (cu->dwo_unit != nullptr) | |
24058 | { | |
24059 | str_offsets_section = &cu->dwo_unit->dwo_file | |
24060 | ->sections.str_offsets; | |
24061 | str_section = &cu->dwo_unit->dwo_file->sections.str; | |
24062 | str_offsets_base = cu->header.addr_size; | |
24063 | } | |
24064 | else | |
24065 | { | |
24066 | str_offsets_section = &per_objfile->per_bfd->str_offsets; | |
24067 | str_section = &per_objfile->per_bfd->str; | |
24068 | str_offsets_base = *cu->str_offsets_base; | |
24069 | } | |
24070 | ||
976ca316 | 24071 | dwarf_decode_macros (per_objfile, builder, section, lh, |
048fde1e | 24072 | offset_size, offset, str_section, str_offsets_section, |
24073 | str_offsets_base, section_is_gnu); | |
9eac9650 TT |
24074 | } |
24075 | ||
3019eac3 DE |
24076 | /* Return the .debug_loc section to use for CU. |
24077 | For DWO files use .debug_loc.dwo. */ | |
24078 | ||
24079 | static struct dwarf2_section_info * | |
24080 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
24081 | { | |
976ca316 | 24082 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 24083 | |
3019eac3 | 24084 | if (cu->dwo_unit) |
43988095 JK |
24085 | { |
24086 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 24087 | |
43988095 JK |
24088 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
24089 | } | |
976ca316 SM |
24090 | return (cu->header.version >= 5 ? &per_objfile->per_bfd->loclists |
24091 | : &per_objfile->per_bfd->loc); | |
3019eac3 DE |
24092 | } |
24093 | ||
d0ce17d8 CT |
24094 | /* Return the .debug_rnglists section to use for CU. */ |
24095 | static struct dwarf2_section_info * | |
24096 | cu_debug_rnglists_section (struct dwarf2_cu *cu, dwarf_tag tag) | |
24097 | { | |
24098 | if (cu->header.version < 5) | |
24099 | error (_(".debug_rnglists section cannot be used in DWARF %d"), | |
24100 | cu->header.version); | |
24101 | struct dwarf2_per_objfile *dwarf2_per_objfile = cu->per_objfile; | |
24102 | ||
24103 | /* Make sure we read the .debug_rnglists section from the file that | |
24104 | contains the DW_AT_ranges attribute we are reading. Normally that | |
24105 | would be the .dwo file, if there is one. However for DW_TAG_compile_unit | |
24106 | or DW_TAG_skeleton unit, we always want to read from objfile/linked | |
24107 | program. */ | |
24108 | if (cu->dwo_unit != nullptr | |
24109 | && tag != DW_TAG_compile_unit | |
24110 | && tag != DW_TAG_skeleton_unit) | |
24111 | { | |
24112 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
24113 | ||
24114 | if (sections->rnglists.size > 0) | |
24115 | return §ions->rnglists; | |
24116 | else | |
24117 | error (_(".debug_rnglists section is missing from .dwo file.")); | |
24118 | } | |
24119 | return &dwarf2_per_objfile->per_bfd->rnglists; | |
24120 | } | |
24121 | ||
8cf6f0b1 TT |
24122 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
24123 | ||
24124 | static void | |
24125 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
24126 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 24127 | const struct attribute *attr) |
8cf6f0b1 | 24128 | { |
976ca316 | 24129 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 DE |
24130 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
24131 | ||
976ca316 | 24132 | section->read (per_objfile->objfile); |
8cf6f0b1 | 24133 | |
976ca316 | 24134 | baton->per_objfile = per_objfile; |
8cf6f0b1 TT |
24135 | baton->per_cu = cu->per_cu; |
24136 | gdb_assert (baton->per_cu); | |
24137 | /* We don't know how long the location list is, but make sure we | |
24138 | don't run off the edge of the section. */ | |
d4df075e TT |
24139 | baton->size = section->size - attr->as_unsigned (); |
24140 | baton->data = section->buffer + attr->as_unsigned (); | |
2b24b6e4 TT |
24141 | if (cu->base_address.has_value ()) |
24142 | baton->base_address = *cu->base_address; | |
24143 | else | |
24144 | baton->base_address = 0; | |
f664829e | 24145 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
24146 | } |
24147 | ||
4c2df51b | 24148 | static void |
ff39bb5e | 24149 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 24150 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 24151 | { |
976ca316 SM |
24152 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
24153 | struct objfile *objfile = per_objfile->objfile; | |
3019eac3 | 24154 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 24155 | |
cd6c91b4 | 24156 | if (attr->form_is_section_offset () |
3019eac3 | 24157 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
24158 | the section. If so, fall through to the complaint in the |
24159 | other branch. */ | |
d4df075e | 24160 | && attr->as_unsigned () < section->get_size (objfile)) |
4c2df51b | 24161 | { |
0d53c4c4 | 24162 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 24163 | |
8d749320 | 24164 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 24165 | |
8cf6f0b1 | 24166 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 24167 | |
2b24b6e4 | 24168 | if (!cu->base_address.has_value ()) |
b98664d3 | 24169 | complaint (_("Location list used without " |
3e43a32a | 24170 | "specifying the CU base address.")); |
4c2df51b | 24171 | |
f1e6e072 TT |
24172 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24173 | ? dwarf2_loclist_block_index | |
24174 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24175 | SYMBOL_LOCATION_BATON (sym) = baton; |
24176 | } | |
24177 | else | |
24178 | { | |
24179 | struct dwarf2_locexpr_baton *baton; | |
24180 | ||
8d749320 | 24181 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
976ca316 | 24182 | baton->per_objfile = per_objfile; |
ae0d2f24 UW |
24183 | baton->per_cu = cu->per_cu; |
24184 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 24185 | |
4fc6c0d5 | 24186 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
24187 | { |
24188 | /* Note that we're just copying the block's data pointer | |
24189 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24190 | info_buffer for SYM's objfile; right now we never release |
24191 | that buffer, but when we do clean up properly this may | |
24192 | need to change. */ | |
9d2246fc TT |
24193 | struct dwarf_block *block = attr->as_block (); |
24194 | baton->size = block->size; | |
24195 | baton->data = block->data; | |
0d53c4c4 DJ |
24196 | } |
24197 | else | |
24198 | { | |
24199 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 24200 | sym->natural_name ()); |
0d53c4c4 | 24201 | baton->size = 0; |
0d53c4c4 | 24202 | } |
6e70227d | 24203 | |
f1e6e072 TT |
24204 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24205 | ? dwarf2_locexpr_block_index | |
24206 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24207 | SYMBOL_LOCATION_BATON (sym) = baton; |
24208 | } | |
4c2df51b | 24209 | } |
6502dd73 | 24210 | |
2e6a9f79 | 24211 | /* See read.h. */ |
96408a79 | 24212 | |
2e6a9f79 SM |
24213 | const comp_unit_head * |
24214 | dwarf2_per_cu_data::get_header () const | |
96408a79 | 24215 | { |
2e6a9f79 SM |
24216 | if (!m_header_read_in) |
24217 | { | |
24218 | const gdb_byte *info_ptr | |
24219 | = this->section->buffer + to_underlying (this->sect_off); | |
96408a79 | 24220 | |
2e6a9f79 | 24221 | memset (&m_header, 0, sizeof (m_header)); |
96408a79 | 24222 | |
2e6a9f79 SM |
24223 | read_comp_unit_head (&m_header, info_ptr, this->section, |
24224 | rcuh_kind::COMPILE); | |
a9f172c6 TT |
24225 | |
24226 | m_header_read_in = true; | |
2e6a9f79 | 24227 | } |
96408a79 | 24228 | |
2e6a9f79 | 24229 | return &m_header; |
96408a79 SA |
24230 | } |
24231 | ||
09ba997f | 24232 | /* See read.h. */ |
ae0d2f24 | 24233 | |
98714339 | 24234 | int |
09ba997f | 24235 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 24236 | { |
2e6a9f79 | 24237 | return this->get_header ()->addr_size; |
ae0d2f24 UW |
24238 | } |
24239 | ||
09ba997f | 24240 | /* See read.h. */ |
9eae7c52 TT |
24241 | |
24242 | int | |
09ba997f | 24243 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 24244 | { |
2e6a9f79 | 24245 | return this->get_header ()->offset_size; |
96408a79 SA |
24246 | } |
24247 | ||
09ba997f | 24248 | /* See read.h. */ |
96408a79 SA |
24249 | |
24250 | int | |
09ba997f | 24251 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 | 24252 | { |
2e6a9f79 | 24253 | const comp_unit_head *header = this->get_header (); |
96408a79 | 24254 | |
2e6a9f79 SM |
24255 | if (header->version == 2) |
24256 | return header->addr_size; | |
96408a79 | 24257 | else |
2e6a9f79 | 24258 | return header->offset_size; |
181cebd4 JK |
24259 | } |
24260 | ||
22b6cd70 TT |
24261 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
24262 | the index of the result, and that searches a vector. It will | |
24263 | return a result even if the offset in question does not actually | |
24264 | occur in any CU. This is separate so that it can be unit | |
24265 | tested. */ | |
ae038cb0 | 24266 | |
22b6cd70 TT |
24267 | static int |
24268 | dwarf2_find_containing_comp_unit | |
24269 | (sect_offset sect_off, | |
24270 | unsigned int offset_in_dwz, | |
473ab964 | 24271 | const std::vector<dwarf2_per_cu_data_up> &all_comp_units) |
ae038cb0 | 24272 | { |
ae038cb0 DJ |
24273 | int low, high; |
24274 | ||
ae038cb0 | 24275 | low = 0; |
22b6cd70 | 24276 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
24277 | while (high > low) |
24278 | { | |
36586728 | 24279 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24280 | int mid = low + (high - low) / 2; |
9a619af0 | 24281 | |
0d305d5c | 24282 | mid_cu = all_comp_units[mid].get (); |
36586728 | 24283 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 24284 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 24285 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
24286 | high = mid; |
24287 | else | |
24288 | low = mid + 1; | |
24289 | } | |
24290 | gdb_assert (low == high); | |
22b6cd70 TT |
24291 | return low; |
24292 | } | |
24293 | ||
24294 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
24295 | the DIE at OFFSET. Raises an error on failure. */ | |
24296 | ||
24297 | static struct dwarf2_per_cu_data * | |
24298 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
24299 | unsigned int offset_in_dwz, | |
976ca316 | 24300 | dwarf2_per_objfile *per_objfile) |
22b6cd70 | 24301 | { |
976ca316 SM |
24302 | int low = dwarf2_find_containing_comp_unit |
24303 | (sect_off, offset_in_dwz, per_objfile->per_bfd->all_comp_units); | |
0d305d5c TT |
24304 | dwarf2_per_cu_data *this_cu |
24305 | = per_objfile->per_bfd->all_comp_units[low].get (); | |
22b6cd70 | 24306 | |
45b8ae0c | 24307 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 24308 | { |
36586728 | 24309 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24310 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
24311 | "offset %s [in module %s]"), |
24312 | sect_offset_str (sect_off), | |
976ca316 | 24313 | bfd_get_filename (per_objfile->objfile->obfd)); |
10b3939b | 24314 | |
976ca316 | 24315 | gdb_assert (per_objfile->per_bfd->all_comp_units[low-1]->sect_off |
9c541725 | 24316 | <= sect_off); |
0d305d5c | 24317 | return per_objfile->per_bfd->all_comp_units[low - 1].get (); |
ae038cb0 DJ |
24318 | } |
24319 | else | |
24320 | { | |
976ca316 | 24321 | if (low == per_objfile->per_bfd->all_comp_units.size () - 1 |
9c541725 | 24322 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 24323 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 24324 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
24325 | return this_cu; |
24326 | } | |
24327 | } | |
24328 | ||
22b6cd70 TT |
24329 | #if GDB_SELF_TEST |
24330 | ||
24331 | namespace selftests { | |
24332 | namespace find_containing_comp_unit { | |
24333 | ||
24334 | static void | |
24335 | run_test () | |
24336 | { | |
473ab964 | 24337 | dwarf2_per_cu_data_up one (new dwarf2_per_cu_data); |
0d305d5c | 24338 | dwarf2_per_cu_data *one_ptr = one.get (); |
473ab964 | 24339 | dwarf2_per_cu_data_up two (new dwarf2_per_cu_data); |
0d305d5c | 24340 | dwarf2_per_cu_data *two_ptr = two.get (); |
473ab964 | 24341 | dwarf2_per_cu_data_up three (new dwarf2_per_cu_data); |
0d305d5c | 24342 | dwarf2_per_cu_data *three_ptr = three.get (); |
473ab964 | 24343 | dwarf2_per_cu_data_up four (new dwarf2_per_cu_data); |
0d305d5c TT |
24344 | dwarf2_per_cu_data *four_ptr = four.get (); |
24345 | ||
24346 | one->length = 5; | |
24347 | two->sect_off = sect_offset (one->length); | |
24348 | two->length = 7; | |
24349 | ||
24350 | three->length = 5; | |
24351 | three->is_dwz = 1; | |
24352 | four->sect_off = sect_offset (three->length); | |
24353 | four->length = 7; | |
24354 | four->is_dwz = 1; | |
24355 | ||
473ab964 | 24356 | std::vector<dwarf2_per_cu_data_up> units; |
0d305d5c TT |
24357 | units.push_back (std::move (one)); |
24358 | units.push_back (std::move (two)); | |
24359 | units.push_back (std::move (three)); | |
24360 | units.push_back (std::move (four)); | |
22b6cd70 TT |
24361 | |
24362 | int result; | |
24363 | ||
24364 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
0d305d5c | 24365 | SELF_CHECK (units[result].get () == one_ptr); |
22b6cd70 | 24366 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); |
0d305d5c | 24367 | SELF_CHECK (units[result].get () == one_ptr); |
22b6cd70 | 24368 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); |
0d305d5c | 24369 | SELF_CHECK (units[result].get () == two_ptr); |
22b6cd70 TT |
24370 | |
24371 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
0d305d5c | 24372 | SELF_CHECK (units[result].get () == three_ptr); |
22b6cd70 | 24373 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); |
0d305d5c | 24374 | SELF_CHECK (units[result].get () == three_ptr); |
22b6cd70 | 24375 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); |
0d305d5c | 24376 | SELF_CHECK (units[result].get () == four_ptr); |
22b6cd70 TT |
24377 | } |
24378 | ||
24379 | } | |
24380 | } | |
24381 | ||
24382 | #endif /* GDB_SELF_TEST */ | |
24383 | ||
9816fde3 JK |
24384 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ |
24385 | ||
24386 | static void | |
95554aad TT |
24387 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24388 | enum language pretend_language) | |
9816fde3 JK |
24389 | { |
24390 | struct attribute *attr; | |
24391 | ||
24392 | /* Set the language we're debugging. */ | |
24393 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 24394 | if (attr != nullptr) |
529908cb | 24395 | set_cu_language (attr->constant_value (0), cu); |
9816fde3 | 24396 | else |
9cded63f | 24397 | { |
95554aad | 24398 | cu->language = pretend_language; |
9cded63f TT |
24399 | cu->language_defn = language_def (cu->language); |
24400 | } | |
dee91e82 | 24401 | |
7d45c7c3 | 24402 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24403 | } |
24404 | ||
7188ed02 | 24405 | /* See read.h. */ |
ae038cb0 | 24406 | |
7188ed02 SM |
24407 | dwarf2_cu * |
24408 | dwarf2_per_objfile::get_cu (dwarf2_per_cu_data *per_cu) | |
ae038cb0 | 24409 | { |
7188ed02 SM |
24410 | auto it = m_dwarf2_cus.find (per_cu); |
24411 | if (it == m_dwarf2_cus.end ()) | |
24412 | return nullptr; | |
ae038cb0 | 24413 | |
7188ed02 SM |
24414 | return it->second; |
24415 | } | |
24416 | ||
24417 | /* See read.h. */ | |
24418 | ||
24419 | void | |
24420 | dwarf2_per_objfile::set_cu (dwarf2_per_cu_data *per_cu, dwarf2_cu *cu) | |
24421 | { | |
24422 | gdb_assert (this->get_cu (per_cu) == nullptr); | |
24423 | ||
24424 | m_dwarf2_cus[per_cu] = cu; | |
24425 | } | |
24426 | ||
24427 | /* See read.h. */ | |
24428 | ||
24429 | void | |
24430 | dwarf2_per_objfile::age_comp_units () | |
24431 | { | |
17e593e9 SM |
24432 | dwarf_read_debug_printf_v ("running"); |
24433 | ||
08ac5771 SM |
24434 | /* This is not expected to be called in the middle of CU expansion. There is |
24435 | an invariant that if a CU is in the CUs-to-expand queue, its DIEs are | |
24436 | loaded in memory. Calling age_comp_units while the queue is in use could | |
24437 | make us free the DIEs for a CU that is in the queue and therefore break | |
24438 | that invariant. */ | |
24439 | gdb_assert (!this->per_bfd->queue.has_value ()); | |
24440 | ||
7188ed02 SM |
24441 | /* Start by clearing all marks. */ |
24442 | for (auto pair : m_dwarf2_cus) | |
347212b8 | 24443 | pair.second->clear_mark (); |
7188ed02 SM |
24444 | |
24445 | /* Traverse all CUs, mark them and their dependencies if used recently | |
24446 | enough. */ | |
24447 | for (auto pair : m_dwarf2_cus) | |
ae038cb0 | 24448 | { |
7188ed02 SM |
24449 | dwarf2_cu *cu = pair.second; |
24450 | ||
24451 | cu->last_used++; | |
24452 | if (cu->last_used <= dwarf_max_cache_age) | |
347212b8 | 24453 | cu->mark (); |
ae038cb0 DJ |
24454 | } |
24455 | ||
7188ed02 SM |
24456 | /* Delete all CUs still not marked. */ |
24457 | for (auto it = m_dwarf2_cus.begin (); it != m_dwarf2_cus.end ();) | |
ae038cb0 | 24458 | { |
7188ed02 | 24459 | dwarf2_cu *cu = it->second; |
ae038cb0 | 24460 | |
347212b8 | 24461 | if (!cu->is_marked ()) |
ae038cb0 | 24462 | { |
17e593e9 SM |
24463 | dwarf_read_debug_printf_v ("deleting old CU %s", |
24464 | sect_offset_str (cu->per_cu->sect_off)); | |
7188ed02 SM |
24465 | delete cu; |
24466 | it = m_dwarf2_cus.erase (it); | |
ae038cb0 DJ |
24467 | } |
24468 | else | |
7188ed02 | 24469 | it++; |
ae038cb0 DJ |
24470 | } |
24471 | } | |
24472 | ||
7188ed02 | 24473 | /* See read.h. */ |
ae038cb0 | 24474 | |
7188ed02 SM |
24475 | void |
24476 | dwarf2_per_objfile::remove_cu (dwarf2_per_cu_data *per_cu) | |
ae038cb0 | 24477 | { |
7188ed02 SM |
24478 | auto it = m_dwarf2_cus.find (per_cu); |
24479 | if (it == m_dwarf2_cus.end ()) | |
24480 | return; | |
ae038cb0 | 24481 | |
7188ed02 | 24482 | delete it->second; |
ae038cb0 | 24483 | |
7188ed02 SM |
24484 | m_dwarf2_cus.erase (it); |
24485 | } | |
ae038cb0 | 24486 | |
7188ed02 SM |
24487 | dwarf2_per_objfile::~dwarf2_per_objfile () |
24488 | { | |
24489 | remove_all_cus (); | |
ae038cb0 DJ |
24490 | } |
24491 | ||
dee91e82 DE |
24492 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
24493 | We store these in a hash table separate from the DIEs, and preserve them | |
24494 | when the DIEs are flushed out of cache. | |
24495 | ||
24496 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 24497 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
24498 | or the type may come from a DWO file. Furthermore, while it's more logical |
24499 | to use per_cu->section+offset, with Fission the section with the data is in | |
24500 | the DWO file but we don't know that section at the point we need it. | |
24501 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
24502 | because we can enter the lookup routine, get_die_type_at_offset, from | |
24503 | outside this file, and thus won't necessarily have PER_CU->cu. | |
24504 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 24505 | |
dee91e82 | 24506 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 24507 | { |
dee91e82 | 24508 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 24509 | sect_offset sect_off; |
1c379e20 DJ |
24510 | struct type *type; |
24511 | }; | |
24512 | ||
dee91e82 | 24513 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24514 | |
24515 | static hashval_t | |
dee91e82 | 24516 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 24517 | { |
9a3c8263 SM |
24518 | const struct dwarf2_per_cu_offset_and_type *ofs |
24519 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 24520 | |
9c541725 | 24521 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
24522 | } |
24523 | ||
dee91e82 | 24524 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24525 | |
24526 | static int | |
dee91e82 | 24527 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 24528 | { |
9a3c8263 SM |
24529 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
24530 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
24531 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
24532 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 24533 | |
dee91e82 | 24534 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 24535 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
24536 | } |
24537 | ||
24538 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
24539 | table if necessary. For convenience, return TYPE. |
24540 | ||
24541 | The DIEs reading must have careful ordering to: | |
85102364 | 24542 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
24543 | reading current DIE. |
24544 | * Not trying to dereference contents of still incompletely read in types | |
24545 | while reading in other DIEs. | |
24546 | * Enable referencing still incompletely read in types just by a pointer to | |
24547 | the type without accessing its fields. | |
24548 | ||
24549 | Therefore caller should follow these rules: | |
24550 | * Try to fetch any prerequisite types we may need to build this DIE type | |
24551 | before building the type and calling set_die_type. | |
e71ec853 | 24552 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
24553 | possible before fetching more types to complete the current type. |
24554 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 24555 | |
f792889a | 24556 | static struct type * |
57567375 TT |
24557 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
24558 | bool skip_data_location) | |
1c379e20 | 24559 | { |
976ca316 | 24560 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
dee91e82 | 24561 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
976ca316 | 24562 | struct objfile *objfile = per_objfile->objfile; |
3cdcd0ce JB |
24563 | struct attribute *attr; |
24564 | struct dynamic_prop prop; | |
1c379e20 | 24565 | |
b4ba55a1 JB |
24566 | /* For Ada types, make sure that the gnat-specific data is always |
24567 | initialized (if not already set). There are a few types where | |
24568 | we should not be doing so, because the type-specific area is | |
24569 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
24570 | where the type-specific area is used to store the floatformat). | |
24571 | But this is not a problem, because the gnat-specific information | |
24572 | is actually not needed for these types. */ | |
24573 | if (need_gnat_info (cu) | |
78134374 SM |
24574 | && type->code () != TYPE_CODE_FUNC |
24575 | && type->code () != TYPE_CODE_FLT | |
24576 | && type->code () != TYPE_CODE_METHODPTR | |
24577 | && type->code () != TYPE_CODE_MEMBERPTR | |
24578 | && type->code () != TYPE_CODE_METHOD | |
09584414 | 24579 | && type->code () != TYPE_CODE_FIXED_POINT |
b4ba55a1 JB |
24580 | && !HAVE_GNAT_AUX_INFO (type)) |
24581 | INIT_GNAT_SPECIFIC (type); | |
24582 | ||
3f2f83dd KB |
24583 | /* Read DW_AT_allocated and set in type. */ |
24584 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
9cdf9820 | 24585 | if (attr != NULL) |
3f2f83dd | 24586 | { |
293e7e51 | 24587 | struct type *prop_type = cu->addr_sized_int_type (false); |
9a49df9d | 24588 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
dda83cd7 | 24589 | type->add_dyn_prop (DYN_PROP_ALLOCATED, prop); |
3f2f83dd | 24590 | } |
3f2f83dd KB |
24591 | |
24592 | /* Read DW_AT_associated and set in type. */ | |
24593 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
9cdf9820 | 24594 | if (attr != NULL) |
3f2f83dd | 24595 | { |
293e7e51 | 24596 | struct type *prop_type = cu->addr_sized_int_type (false); |
9a49df9d | 24597 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
dda83cd7 | 24598 | type->add_dyn_prop (DYN_PROP_ASSOCIATED, prop); |
3f2f83dd | 24599 | } |
3f2f83dd | 24600 | |
3cdcd0ce | 24601 | /* Read DW_AT_data_location and set in type. */ |
57567375 TT |
24602 | if (!skip_data_location) |
24603 | { | |
24604 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
24605 | if (attr_to_dynamic_prop (attr, die, cu, &prop, cu->addr_type ())) | |
24606 | type->add_dyn_prop (DYN_PROP_DATA_LOCATION, prop); | |
24607 | } | |
3cdcd0ce | 24608 | |
976ca316 SM |
24609 | if (per_objfile->die_type_hash == NULL) |
24610 | per_objfile->die_type_hash | |
0335378b TT |
24611 | = htab_up (htab_create_alloc (127, |
24612 | per_cu_offset_and_type_hash, | |
24613 | per_cu_offset_and_type_eq, | |
24614 | NULL, xcalloc, xfree)); | |
1c379e20 | 24615 | |
dee91e82 | 24616 | ofs.per_cu = cu->per_cu; |
9c541725 | 24617 | ofs.sect_off = die->sect_off; |
1c379e20 | 24618 | ofs.type = type; |
dee91e82 | 24619 | slot = (struct dwarf2_per_cu_offset_and_type **) |
976ca316 | 24620 | htab_find_slot (per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 24621 | if (*slot) |
b98664d3 | 24622 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 24623 | sect_offset_str (die->sect_off)); |
8d749320 SM |
24624 | *slot = XOBNEW (&objfile->objfile_obstack, |
24625 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 24626 | **slot = ofs; |
f792889a | 24627 | return type; |
1c379e20 DJ |
24628 | } |
24629 | ||
9c541725 | 24630 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24631 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24632 | |
24633 | static struct type * | |
9c541725 | 24634 | get_die_type_at_offset (sect_offset sect_off, |
aa66c379 | 24635 | dwarf2_per_cu_data *per_cu, |
976ca316 | 24636 | dwarf2_per_objfile *per_objfile) |
1c379e20 | 24637 | { |
dee91e82 | 24638 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 24639 | |
976ca316 | 24640 | if (per_objfile->die_type_hash == NULL) |
f792889a | 24641 | return NULL; |
1c379e20 | 24642 | |
dee91e82 | 24643 | ofs.per_cu = per_cu; |
9c541725 | 24644 | ofs.sect_off = sect_off; |
9a3c8263 | 24645 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
976ca316 | 24646 | htab_find (per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
24647 | if (slot) |
24648 | return slot->type; | |
24649 | else | |
24650 | return NULL; | |
24651 | } | |
24652 | ||
02142a6c | 24653 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24654 | or return NULL if DIE does not have a saved type. */ |
24655 | ||
24656 | static struct type * | |
24657 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24658 | { | |
aa66c379 | 24659 | return get_die_type_at_offset (die->sect_off, cu->per_cu, cu->per_objfile); |
673bfd45 DE |
24660 | } |
24661 | ||
72bf9492 DJ |
24662 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24663 | is its offset in .debug_info for this objfile. */ | |
24664 | ||
24665 | static hashval_t | |
24666 | partial_die_hash (const void *item) | |
24667 | { | |
9a3c8263 SM |
24668 | const struct partial_die_info *part_die |
24669 | = (const struct partial_die_info *) item; | |
9a619af0 | 24670 | |
9c541725 | 24671 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24672 | } |
24673 | ||
24674 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24675 | are equal if they have the same offset. */ | |
24676 | ||
24677 | static int | |
24678 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24679 | { | |
9a3c8263 SM |
24680 | const struct partial_die_info *part_die_lhs |
24681 | = (const struct partial_die_info *) item_lhs; | |
24682 | const struct partial_die_info *part_die_rhs | |
24683 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24684 | |
9c541725 | 24685 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24686 | } |
24687 | ||
3c3bb058 AB |
24688 | struct cmd_list_element *set_dwarf_cmdlist; |
24689 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 | 24690 | |
9291a0cd | 24691 | static void |
cd4fb1b2 SM |
24692 | show_check_physname (struct ui_file *file, int from_tty, |
24693 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 24694 | { |
cd4fb1b2 SM |
24695 | fprintf_filtered (file, |
24696 | _("Whether to check \"physname\" is %s.\n"), | |
24697 | value); | |
9291a0cd TT |
24698 | } |
24699 | ||
6c265988 | 24700 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 24701 | void |
6c265988 | 24702 | _initialize_dwarf2_read () |
9291a0cd | 24703 | { |
0743fc83 | 24704 | add_basic_prefix_cmd ("dwarf", class_maintenance, _("\ |
cd4fb1b2 | 24705 | Set DWARF specific variables.\n\ |
590042fc | 24706 | Configure DWARF variables such as the cache size."), |
2f822da5 | 24707 | &set_dwarf_cmdlist, |
0743fc83 | 24708 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
156942c7 | 24709 | |
0743fc83 | 24710 | add_show_prefix_cmd ("dwarf", class_maintenance, _("\ |
590042fc PW |
24711 | Show DWARF specific variables.\n\ |
24712 | Show DWARF variables such as the cache size."), | |
2f822da5 | 24713 | &show_dwarf_cmdlist, |
0743fc83 | 24714 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
156942c7 | 24715 | |
cd4fb1b2 SM |
24716 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
24717 | &dwarf_max_cache_age, _("\ | |
24718 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24719 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
24720 | A higher limit means that cached compilation units will be stored\n\ | |
24721 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24722 | caching, which can slow down startup."), | |
24723 | NULL, | |
24724 | show_dwarf_max_cache_age, | |
24725 | &set_dwarf_cmdlist, | |
24726 | &show_dwarf_cmdlist); | |
156942c7 | 24727 | |
cd4fb1b2 SM |
24728 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
24729 | Set debugging of the DWARF reader."), _("\ | |
24730 | Show debugging of the DWARF reader."), _("\ | |
24731 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
24732 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
24733 | information. A value greater than 1 provides more verbose information."), | |
24734 | NULL, | |
24735 | NULL, | |
24736 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24737 | |
749369c4 | 24738 | add_setshow_boolean_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
cd4fb1b2 SM |
24739 | Set debugging of the DWARF DIE reader."), _("\ |
24740 | Show debugging of the DWARF DIE reader."), _("\ | |
749369c4 | 24741 | When enabled, DIEs are dumped after they are read in.\n\ |
cd4fb1b2 | 24742 | The value is the maximum depth to print."), |
749369c4 SM |
24743 | NULL, |
24744 | NULL, | |
24745 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24746 | |
cd4fb1b2 SM |
24747 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24748 | Set debugging of the dwarf line reader."), _("\ | |
24749 | Show debugging of the dwarf line reader."), _("\ | |
24750 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24751 | A value of 1 (one) provides basic information.\n\ | |
24752 | A value greater than 1 provides more verbose information."), | |
24753 | NULL, | |
24754 | NULL, | |
24755 | &setdebuglist, &showdebuglist); | |
437afbb8 | 24756 | |
cd4fb1b2 SM |
24757 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24758 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24759 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24760 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24761 | the demangler."), | |
24762 | NULL, show_check_physname, | |
24763 | &setdebuglist, &showdebuglist); | |
900e11f9 | 24764 | |
e615022a DE |
24765 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24766 | no_class, &use_deprecated_index_sections, _("\ | |
24767 | Set whether to use deprecated gdb_index sections."), _("\ | |
24768 | Show whether to use deprecated gdb_index sections."), _("\ | |
24769 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24770 | Normally they are ignored either because of a missing feature or\n\ | |
24771 | performance issue.\n\ | |
24772 | Warning: This option must be enabled before gdb reads the file."), | |
24773 | NULL, | |
24774 | NULL, | |
24775 | &setlist, &showlist); | |
24776 | ||
f1e6e072 TT |
24777 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
24778 | &dwarf2_locexpr_funcs); | |
24779 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24780 | &dwarf2_loclist_funcs); | |
24781 | ||
24782 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24783 | &dwarf2_block_frame_base_locexpr_funcs); | |
24784 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24785 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24786 | |
24787 | #if GDB_SELF_TEST | |
24788 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24789 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
24790 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
24791 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 24792 | #endif |
6502dd73 | 24793 | } |