| 1 | /* DWARF 2 debugging format support for GDB. |
| 2 | |
| 3 | Copyright (C) 1994-2020 Free Software Foundation, Inc. |
| 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 |
| 10 | support. |
| 11 | |
| 12 | This file is part of GDB. |
| 13 | |
| 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 |
| 16 | the Free Software Foundation; either version 3 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 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. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 26 | |
| 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 | |
| 31 | #include "defs.h" |
| 32 | #include "dwarf2/read.h" |
| 33 | #include "dwarf2/abbrev.h" |
| 34 | #include "dwarf2/attribute.h" |
| 35 | #include "dwarf2/comp-unit.h" |
| 36 | #include "dwarf2/index-cache.h" |
| 37 | #include "dwarf2/index-common.h" |
| 38 | #include "dwarf2/leb.h" |
| 39 | #include "dwarf2/line-header.h" |
| 40 | #include "dwarf2/dwz.h" |
| 41 | #include "dwarf2/macro.h" |
| 42 | #include "dwarf2/die.h" |
| 43 | #include "dwarf2/stringify.h" |
| 44 | #include "bfd.h" |
| 45 | #include "elf-bfd.h" |
| 46 | #include "symtab.h" |
| 47 | #include "gdbtypes.h" |
| 48 | #include "objfiles.h" |
| 49 | #include "dwarf2.h" |
| 50 | #include "buildsym.h" |
| 51 | #include "demangle.h" |
| 52 | #include "gdb-demangle.h" |
| 53 | #include "filenames.h" /* for DOSish file names */ |
| 54 | #include "language.h" |
| 55 | #include "complaints.h" |
| 56 | #include "dwarf2/expr.h" |
| 57 | #include "dwarf2/loc.h" |
| 58 | #include "cp-support.h" |
| 59 | #include "hashtab.h" |
| 60 | #include "command.h" |
| 61 | #include "gdbcmd.h" |
| 62 | #include "block.h" |
| 63 | #include "addrmap.h" |
| 64 | #include "typeprint.h" |
| 65 | #include "psympriv.h" |
| 66 | #include "c-lang.h" |
| 67 | #include "go-lang.h" |
| 68 | #include "valprint.h" |
| 69 | #include "gdbcore.h" /* for gnutarget */ |
| 70 | #include "gdb/gdb-index.h" |
| 71 | #include "gdb_bfd.h" |
| 72 | #include "f-lang.h" |
| 73 | #include "source.h" |
| 74 | #include "build-id.h" |
| 75 | #include "namespace.h" |
| 76 | #include "gdbsupport/function-view.h" |
| 77 | #include "gdbsupport/gdb_optional.h" |
| 78 | #include "gdbsupport/underlying.h" |
| 79 | #include "gdbsupport/hash_enum.h" |
| 80 | #include "filename-seen-cache.h" |
| 81 | #include "producer.h" |
| 82 | #include <fcntl.h> |
| 83 | #include <algorithm> |
| 84 | #include <unordered_map> |
| 85 | #include "gdbsupport/selftest.h" |
| 86 | #include "rust-lang.h" |
| 87 | #include "gdbsupport/pathstuff.h" |
| 88 | #include "count-one-bits.h" |
| 89 | #include "debuginfod-support.h" |
| 90 | |
| 91 | /* When == 1, print basic high level tracing messages. |
| 92 | When > 1, be more verbose. |
| 93 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
| 94 | static unsigned int dwarf_read_debug = 0; |
| 95 | |
| 96 | /* When non-zero, dump DIEs after they are read in. */ |
| 97 | static unsigned int dwarf_die_debug = 0; |
| 98 | |
| 99 | /* When non-zero, dump line number entries as they are read in. */ |
| 100 | unsigned int dwarf_line_debug = 0; |
| 101 | |
| 102 | /* When true, cross-check physname against demangler. */ |
| 103 | static bool check_physname = false; |
| 104 | |
| 105 | /* When true, do not reject deprecated .gdb_index sections. */ |
| 106 | static bool use_deprecated_index_sections = false; |
| 107 | |
| 108 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
| 109 | |
| 110 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
| 111 | |
| 112 | static int dwarf2_locexpr_index; |
| 113 | static int dwarf2_loclist_index; |
| 114 | static int dwarf2_locexpr_block_index; |
| 115 | static int dwarf2_loclist_block_index; |
| 116 | |
| 117 | /* Size of .debug_loclists section header for 32-bit DWARF format. */ |
| 118 | #define LOCLIST_HEADER_SIZE32 12 |
| 119 | |
| 120 | /* Size of .debug_loclists section header for 64-bit DWARF format. */ |
| 121 | #define LOCLIST_HEADER_SIZE64 20 |
| 122 | |
| 123 | /* An index into a (C++) symbol name component in a symbol name as |
| 124 | recorded in the mapped_index's symbol table. For each C++ symbol |
| 125 | in the symbol table, we record one entry for the start of each |
| 126 | component in the symbol in a table of name components, and then |
| 127 | sort the table, in order to be able to binary search symbol names, |
| 128 | ignoring leading namespaces, both completion and regular look up. |
| 129 | For example, for symbol "A::B::C", we'll have an entry that points |
| 130 | to "A::B::C", another that points to "B::C", and another for "C". |
| 131 | Note that function symbols in GDB index have no parameter |
| 132 | information, just the function/method names. You can convert a |
| 133 | name_component to a "const char *" using the |
| 134 | 'mapped_index::symbol_name_at(offset_type)' method. */ |
| 135 | |
| 136 | struct name_component |
| 137 | { |
| 138 | /* Offset in the symbol name where the component starts. Stored as |
| 139 | a (32-bit) offset instead of a pointer to save memory and improve |
| 140 | locality on 64-bit architectures. */ |
| 141 | offset_type name_offset; |
| 142 | |
| 143 | /* The symbol's index in the symbol and constant pool tables of a |
| 144 | mapped_index. */ |
| 145 | offset_type idx; |
| 146 | }; |
| 147 | |
| 148 | /* Base class containing bits shared by both .gdb_index and |
| 149 | .debug_name indexes. */ |
| 150 | |
| 151 | struct mapped_index_base |
| 152 | { |
| 153 | mapped_index_base () = default; |
| 154 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); |
| 155 | |
| 156 | /* The name_component table (a sorted vector). See name_component's |
| 157 | description above. */ |
| 158 | std::vector<name_component> name_components; |
| 159 | |
| 160 | /* How NAME_COMPONENTS is sorted. */ |
| 161 | enum case_sensitivity name_components_casing; |
| 162 | |
| 163 | /* Return the number of names in the symbol table. */ |
| 164 | virtual size_t symbol_name_count () const = 0; |
| 165 | |
| 166 | /* Get the name of the symbol at IDX in the symbol table. */ |
| 167 | virtual const char *symbol_name_at (offset_type idx) const = 0; |
| 168 | |
| 169 | /* Return whether the name at IDX in the symbol table should be |
| 170 | ignored. */ |
| 171 | virtual bool symbol_name_slot_invalid (offset_type idx) const |
| 172 | { |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | /* Build the symbol name component sorted vector, if we haven't |
| 177 | yet. */ |
| 178 | void build_name_components (); |
| 179 | |
| 180 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the |
| 181 | possible matches for LN_NO_PARAMS in the name component |
| 182 | vector. */ |
| 183 | std::pair<std::vector<name_component>::const_iterator, |
| 184 | std::vector<name_component>::const_iterator> |
| 185 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
| 186 | enum language lang) const; |
| 187 | |
| 188 | /* Prevent deleting/destroying via a base class pointer. */ |
| 189 | protected: |
| 190 | ~mapped_index_base() = default; |
| 191 | }; |
| 192 | |
| 193 | /* A description of the mapped index. The file format is described in |
| 194 | a comment by the code that writes the index. */ |
| 195 | struct mapped_index final : public mapped_index_base |
| 196 | { |
| 197 | /* A slot/bucket in the symbol table hash. */ |
| 198 | struct symbol_table_slot |
| 199 | { |
| 200 | const offset_type name; |
| 201 | const offset_type vec; |
| 202 | }; |
| 203 | |
| 204 | /* Index data format version. */ |
| 205 | int version = 0; |
| 206 | |
| 207 | /* The address table data. */ |
| 208 | gdb::array_view<const gdb_byte> address_table; |
| 209 | |
| 210 | /* The symbol table, implemented as a hash table. */ |
| 211 | gdb::array_view<symbol_table_slot> symbol_table; |
| 212 | |
| 213 | /* A pointer to the constant pool. */ |
| 214 | const char *constant_pool = nullptr; |
| 215 | |
| 216 | bool symbol_name_slot_invalid (offset_type idx) const override |
| 217 | { |
| 218 | const auto &bucket = this->symbol_table[idx]; |
| 219 | return bucket.name == 0 && bucket.vec == 0; |
| 220 | } |
| 221 | |
| 222 | /* Convenience method to get at the name of the symbol at IDX in the |
| 223 | symbol table. */ |
| 224 | const char *symbol_name_at (offset_type idx) const override |
| 225 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
| 226 | |
| 227 | size_t symbol_name_count () const override |
| 228 | { return this->symbol_table.size (); } |
| 229 | }; |
| 230 | |
| 231 | /* A description of the mapped .debug_names. |
| 232 | Uninitialized map has CU_COUNT 0. */ |
| 233 | struct mapped_debug_names final : public mapped_index_base |
| 234 | { |
| 235 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
| 236 | : dwarf2_per_objfile (dwarf2_per_objfile_) |
| 237 | {} |
| 238 | |
| 239 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 240 | bfd_endian dwarf5_byte_order; |
| 241 | bool dwarf5_is_dwarf64; |
| 242 | bool augmentation_is_gdb; |
| 243 | uint8_t offset_size; |
| 244 | uint32_t cu_count = 0; |
| 245 | uint32_t tu_count, bucket_count, name_count; |
| 246 | const gdb_byte *cu_table_reordered, *tu_table_reordered; |
| 247 | const uint32_t *bucket_table_reordered, *hash_table_reordered; |
| 248 | const gdb_byte *name_table_string_offs_reordered; |
| 249 | const gdb_byte *name_table_entry_offs_reordered; |
| 250 | const gdb_byte *entry_pool; |
| 251 | |
| 252 | struct index_val |
| 253 | { |
| 254 | ULONGEST dwarf_tag; |
| 255 | struct attr |
| 256 | { |
| 257 | /* Attribute name DW_IDX_*. */ |
| 258 | ULONGEST dw_idx; |
| 259 | |
| 260 | /* Attribute form DW_FORM_*. */ |
| 261 | ULONGEST form; |
| 262 | |
| 263 | /* Value if FORM is DW_FORM_implicit_const. */ |
| 264 | LONGEST implicit_const; |
| 265 | }; |
| 266 | std::vector<attr> attr_vec; |
| 267 | }; |
| 268 | |
| 269 | std::unordered_map<ULONGEST, index_val> abbrev_map; |
| 270 | |
| 271 | const char *namei_to_name (uint32_t namei) const; |
| 272 | |
| 273 | /* Implementation of the mapped_index_base virtual interface, for |
| 274 | the name_components cache. */ |
| 275 | |
| 276 | const char *symbol_name_at (offset_type idx) const override |
| 277 | { return namei_to_name (idx); } |
| 278 | |
| 279 | size_t symbol_name_count () const override |
| 280 | { return this->name_count; } |
| 281 | }; |
| 282 | |
| 283 | /* See dwarf2read.h. */ |
| 284 | |
| 285 | dwarf2_per_objfile * |
| 286 | get_dwarf2_per_objfile (struct objfile *objfile) |
| 287 | { |
| 288 | return dwarf2_objfile_data_key.get (objfile); |
| 289 | } |
| 290 | |
| 291 | /* Default names of the debugging sections. */ |
| 292 | |
| 293 | /* Note that if the debugging section has been compressed, it might |
| 294 | have a name like .zdebug_info. */ |
| 295 | |
| 296 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
| 297 | { |
| 298 | { ".debug_info", ".zdebug_info" }, |
| 299 | { ".debug_abbrev", ".zdebug_abbrev" }, |
| 300 | { ".debug_line", ".zdebug_line" }, |
| 301 | { ".debug_loc", ".zdebug_loc" }, |
| 302 | { ".debug_loclists", ".zdebug_loclists" }, |
| 303 | { ".debug_macinfo", ".zdebug_macinfo" }, |
| 304 | { ".debug_macro", ".zdebug_macro" }, |
| 305 | { ".debug_str", ".zdebug_str" }, |
| 306 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
| 307 | { ".debug_line_str", ".zdebug_line_str" }, |
| 308 | { ".debug_ranges", ".zdebug_ranges" }, |
| 309 | { ".debug_rnglists", ".zdebug_rnglists" }, |
| 310 | { ".debug_types", ".zdebug_types" }, |
| 311 | { ".debug_addr", ".zdebug_addr" }, |
| 312 | { ".debug_frame", ".zdebug_frame" }, |
| 313 | { ".eh_frame", NULL }, |
| 314 | { ".gdb_index", ".zgdb_index" }, |
| 315 | { ".debug_names", ".zdebug_names" }, |
| 316 | { ".debug_aranges", ".zdebug_aranges" }, |
| 317 | 23 |
| 318 | }; |
| 319 | |
| 320 | /* List of DWO/DWP sections. */ |
| 321 | |
| 322 | static const struct dwop_section_names |
| 323 | { |
| 324 | struct dwarf2_section_names abbrev_dwo; |
| 325 | struct dwarf2_section_names info_dwo; |
| 326 | struct dwarf2_section_names line_dwo; |
| 327 | struct dwarf2_section_names loc_dwo; |
| 328 | struct dwarf2_section_names loclists_dwo; |
| 329 | struct dwarf2_section_names macinfo_dwo; |
| 330 | struct dwarf2_section_names macro_dwo; |
| 331 | struct dwarf2_section_names str_dwo; |
| 332 | struct dwarf2_section_names str_offsets_dwo; |
| 333 | struct dwarf2_section_names types_dwo; |
| 334 | struct dwarf2_section_names cu_index; |
| 335 | struct dwarf2_section_names tu_index; |
| 336 | } |
| 337 | dwop_section_names = |
| 338 | { |
| 339 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, |
| 340 | { ".debug_info.dwo", ".zdebug_info.dwo" }, |
| 341 | { ".debug_line.dwo", ".zdebug_line.dwo" }, |
| 342 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, |
| 343 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
| 344 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
| 345 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, |
| 346 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
| 347 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, |
| 348 | { ".debug_types.dwo", ".zdebug_types.dwo" }, |
| 349 | { ".debug_cu_index", ".zdebug_cu_index" }, |
| 350 | { ".debug_tu_index", ".zdebug_tu_index" }, |
| 351 | }; |
| 352 | |
| 353 | /* local data types */ |
| 354 | |
| 355 | /* The location list section (.debug_loclists) begins with a header, |
| 356 | which contains the following information. */ |
| 357 | struct loclist_header |
| 358 | { |
| 359 | /* A 4-byte or 12-byte length containing the length of the |
| 360 | set of entries for this compilation unit, not including the |
| 361 | length field itself. */ |
| 362 | unsigned int length; |
| 363 | |
| 364 | /* A 2-byte version identifier. */ |
| 365 | short version; |
| 366 | |
| 367 | /* A 1-byte unsigned integer containing the size in bytes of an address on |
| 368 | the target system. */ |
| 369 | unsigned char addr_size; |
| 370 | |
| 371 | /* A 1-byte unsigned integer containing the size in bytes of a segment selector |
| 372 | on the target system. */ |
| 373 | unsigned char segment_collector_size; |
| 374 | |
| 375 | /* A 4-byte count of the number of offsets that follow the header. */ |
| 376 | unsigned int offset_entry_count; |
| 377 | }; |
| 378 | |
| 379 | /* Type used for delaying computation of method physnames. |
| 380 | See comments for compute_delayed_physnames. */ |
| 381 | struct delayed_method_info |
| 382 | { |
| 383 | /* The type to which the method is attached, i.e., its parent class. */ |
| 384 | struct type *type; |
| 385 | |
| 386 | /* The index of the method in the type's function fieldlists. */ |
| 387 | int fnfield_index; |
| 388 | |
| 389 | /* The index of the method in the fieldlist. */ |
| 390 | int index; |
| 391 | |
| 392 | /* The name of the DIE. */ |
| 393 | const char *name; |
| 394 | |
| 395 | /* The DIE associated with this method. */ |
| 396 | struct die_info *die; |
| 397 | }; |
| 398 | |
| 399 | /* Internal state when decoding a particular compilation unit. */ |
| 400 | struct dwarf2_cu |
| 401 | { |
| 402 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
| 403 | ~dwarf2_cu (); |
| 404 | |
| 405 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); |
| 406 | |
| 407 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
| 408 | Create the set of symtabs used by this TU, or if this TU is sharing |
| 409 | symtabs with another TU and the symtabs have already been created |
| 410 | then restore those symtabs in the line header. |
| 411 | We don't need the pc/line-number mapping for type units. */ |
| 412 | void setup_type_unit_groups (struct die_info *die); |
| 413 | |
| 414 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
| 415 | buildsym_compunit constructor. */ |
| 416 | struct compunit_symtab *start_symtab (const char *name, |
| 417 | const char *comp_dir, |
| 418 | CORE_ADDR low_pc); |
| 419 | |
| 420 | /* Reset the builder. */ |
| 421 | void reset_builder () { m_builder.reset (); } |
| 422 | |
| 423 | /* The header of the compilation unit. */ |
| 424 | struct comp_unit_head header {}; |
| 425 | |
| 426 | /* Base address of this compilation unit. */ |
| 427 | gdb::optional<CORE_ADDR> base_address; |
| 428 | |
| 429 | /* The language we are debugging. */ |
| 430 | enum language language = language_unknown; |
| 431 | const struct language_defn *language_defn = nullptr; |
| 432 | |
| 433 | const char *producer = nullptr; |
| 434 | |
| 435 | private: |
| 436 | /* The symtab builder for this CU. This is only non-NULL when full |
| 437 | symbols are being read. */ |
| 438 | std::unique_ptr<buildsym_compunit> m_builder; |
| 439 | |
| 440 | public: |
| 441 | /* The generic symbol table building routines have separate lists for |
| 442 | file scope symbols and all all other scopes (local scopes). So |
| 443 | we need to select the right one to pass to add_symbol_to_list(). |
| 444 | We do it by keeping a pointer to the correct list in list_in_scope. |
| 445 | |
| 446 | FIXME: The original dwarf code just treated the file scope as the |
| 447 | first local scope, and all other local scopes as nested local |
| 448 | scopes, and worked fine. Check to see if we really need to |
| 449 | distinguish these in buildsym.c. */ |
| 450 | struct pending **list_in_scope = nullptr; |
| 451 | |
| 452 | /* Hash table holding all the loaded partial DIEs |
| 453 | with partial_die->offset.SECT_OFF as hash. */ |
| 454 | htab_t partial_dies = nullptr; |
| 455 | |
| 456 | /* Storage for things with the same lifetime as this read-in compilation |
| 457 | unit, including partial DIEs. */ |
| 458 | auto_obstack comp_unit_obstack; |
| 459 | |
| 460 | /* When multiple dwarf2_cu structures are living in memory, this field |
| 461 | chains them all together, so that they can be released efficiently. |
| 462 | We will probably also want a generation counter so that most-recently-used |
| 463 | compilation units are cached... */ |
| 464 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
| 465 | |
| 466 | /* Backlink to our per_cu entry. */ |
| 467 | struct dwarf2_per_cu_data *per_cu; |
| 468 | |
| 469 | /* How many compilation units ago was this CU last referenced? */ |
| 470 | int last_used = 0; |
| 471 | |
| 472 | /* A hash table of DIE cu_offset for following references with |
| 473 | die_info->offset.sect_off as hash. */ |
| 474 | htab_t die_hash = nullptr; |
| 475 | |
| 476 | /* Full DIEs if read in. */ |
| 477 | struct die_info *dies = nullptr; |
| 478 | |
| 479 | /* A set of pointers to dwarf2_per_cu_data objects for compilation |
| 480 | units referenced by this one. Only set during full symbol processing; |
| 481 | partial symbol tables do not have dependencies. */ |
| 482 | htab_t dependencies = nullptr; |
| 483 | |
| 484 | /* Header data from the line table, during full symbol processing. */ |
| 485 | struct line_header *line_header = nullptr; |
| 486 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
| 487 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, |
| 488 | this is the DW_TAG_compile_unit die for this CU. We'll hold on |
| 489 | to the line header as long as this DIE is being processed. See |
| 490 | process_die_scope. */ |
| 491 | die_info *line_header_die_owner = nullptr; |
| 492 | |
| 493 | /* A list of methods which need to have physnames computed |
| 494 | after all type information has been read. */ |
| 495 | std::vector<delayed_method_info> method_list; |
| 496 | |
| 497 | /* To be copied to symtab->call_site_htab. */ |
| 498 | htab_t call_site_htab = nullptr; |
| 499 | |
| 500 | /* Non-NULL if this CU came from a DWO file. |
| 501 | There is an invariant here that is important to remember: |
| 502 | Except for attributes copied from the top level DIE in the "main" |
| 503 | (or "stub") file in preparation for reading the DWO file |
| 504 | (e.g., DW_AT_addr_base), we KISS: there is only *one* CU. |
| 505 | Either there isn't a DWO file (in which case this is NULL and the point |
| 506 | is moot), or there is and either we're not going to read it (in which |
| 507 | case this is NULL) or there is and we are reading it (in which case this |
| 508 | is non-NULL). */ |
| 509 | struct dwo_unit *dwo_unit = nullptr; |
| 510 | |
| 511 | /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present. |
| 512 | Note this value comes from the Fission stub CU/TU's DIE. */ |
| 513 | gdb::optional<ULONGEST> addr_base; |
| 514 | |
| 515 | /* The DW_AT_rnglists_base attribute if present. |
| 516 | Note this value comes from the Fission stub CU/TU's DIE. |
| 517 | Also note that the value is zero in the non-DWO case so this value can |
| 518 | be used without needing to know whether DWO files are in use or not. |
| 519 | N.B. This does not apply to DW_AT_ranges appearing in |
| 520 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever |
| 521 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then |
| 522 | DW_AT_rnglists_base *would* have to be applied, and we'd have to care |
| 523 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ |
| 524 | ULONGEST ranges_base = 0; |
| 525 | |
| 526 | /* The DW_AT_loclists_base attribute if present. */ |
| 527 | ULONGEST loclist_base = 0; |
| 528 | |
| 529 | /* When reading debug info generated by older versions of rustc, we |
| 530 | have to rewrite some union types to be struct types with a |
| 531 | variant part. This rewriting must be done after the CU is fully |
| 532 | read in, because otherwise at the point of rewriting some struct |
| 533 | type might not have been fully processed. So, we keep a list of |
| 534 | all such types here and process them after expansion. */ |
| 535 | std::vector<struct type *> rust_unions; |
| 536 | |
| 537 | /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO |
| 538 | files, the value is implicitly zero. For DWARF 5 version DWO files, the |
| 539 | value is often implicit and is the size of the header of |
| 540 | .debug_str_offsets section (8 or 4, depending on the address size). */ |
| 541 | gdb::optional<ULONGEST> str_offsets_base; |
| 542 | |
| 543 | /* Mark used when releasing cached dies. */ |
| 544 | bool mark : 1; |
| 545 | |
| 546 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
| 547 | This test is imperfect as there may exist optimized debug code not using |
| 548 | any location list and still facing inlining issues if handled as |
| 549 | unoptimized code. For a future better test see GCC PR other/32998. */ |
| 550 | bool has_loclist : 1; |
| 551 | |
| 552 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
| 553 | if all the producer_is_* fields are valid. This information is cached |
| 554 | because profiling CU expansion showed excessive time spent in |
| 555 | producer_is_gxx_lt_4_6. */ |
| 556 | bool checked_producer : 1; |
| 557 | bool producer_is_gxx_lt_4_6 : 1; |
| 558 | bool producer_is_gcc_lt_4_3 : 1; |
| 559 | bool producer_is_icc : 1; |
| 560 | bool producer_is_icc_lt_14 : 1; |
| 561 | bool producer_is_codewarrior : 1; |
| 562 | |
| 563 | /* When true, the file that we're processing is known to have |
| 564 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
| 565 | this information, but later versions do. */ |
| 566 | |
| 567 | bool processing_has_namespace_info : 1; |
| 568 | |
| 569 | struct partial_die_info *find_partial_die (sect_offset sect_off); |
| 570 | |
| 571 | /* If this CU was inherited by another CU (via specification, |
| 572 | abstract_origin, etc), this is the ancestor CU. */ |
| 573 | dwarf2_cu *ancestor; |
| 574 | |
| 575 | /* Get the buildsym_compunit for this CU. */ |
| 576 | buildsym_compunit *get_builder () |
| 577 | { |
| 578 | /* If this CU has a builder associated with it, use that. */ |
| 579 | if (m_builder != nullptr) |
| 580 | return m_builder.get (); |
| 581 | |
| 582 | /* Otherwise, search ancestors for a valid builder. */ |
| 583 | if (ancestor != nullptr) |
| 584 | return ancestor->get_builder (); |
| 585 | |
| 586 | return nullptr; |
| 587 | } |
| 588 | }; |
| 589 | |
| 590 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
| 591 | This includes type_unit_group and quick_file_names. */ |
| 592 | |
| 593 | struct stmt_list_hash |
| 594 | { |
| 595 | /* The DWO unit this table is from or NULL if there is none. */ |
| 596 | struct dwo_unit *dwo_unit; |
| 597 | |
| 598 | /* Offset in .debug_line or .debug_line.dwo. */ |
| 599 | sect_offset line_sect_off; |
| 600 | }; |
| 601 | |
| 602 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
| 603 | an object of this type. */ |
| 604 | |
| 605 | struct type_unit_group |
| 606 | { |
| 607 | /* dwarf2read.c's main "handle" on a TU symtab. |
| 608 | To simplify things we create an artificial CU that "includes" all the |
| 609 | type units using this stmt_list so that the rest of the code still has |
| 610 | a "per_cu" handle on the symtab. */ |
| 611 | struct dwarf2_per_cu_data per_cu; |
| 612 | |
| 613 | /* The TUs that share this DW_AT_stmt_list entry. |
| 614 | This is added to while parsing type units to build partial symtabs, |
| 615 | and is deleted afterwards and not used again. */ |
| 616 | std::vector<signatured_type *> *tus; |
| 617 | |
| 618 | /* The compunit symtab. |
| 619 | Type units in a group needn't all be defined in the same source file, |
| 620 | so we create an essentially anonymous symtab as the compunit symtab. */ |
| 621 | struct compunit_symtab *compunit_symtab; |
| 622 | |
| 623 | /* The data used to construct the hash key. */ |
| 624 | struct stmt_list_hash hash; |
| 625 | |
| 626 | /* The symbol tables for this TU (obtained from the files listed in |
| 627 | DW_AT_stmt_list). |
| 628 | WARNING: The order of entries here must match the order of entries |
| 629 | in the line header. After the first TU using this type_unit_group, the |
| 630 | line header for the subsequent TUs is recreated from this. This is done |
| 631 | because we need to use the same symtabs for each TU using the same |
| 632 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, |
| 633 | there's no guarantee the line header doesn't have duplicate entries. */ |
| 634 | struct symtab **symtabs; |
| 635 | }; |
| 636 | |
| 637 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
| 638 | |
| 639 | struct dwo_sections |
| 640 | { |
| 641 | struct dwarf2_section_info abbrev; |
| 642 | struct dwarf2_section_info line; |
| 643 | struct dwarf2_section_info loc; |
| 644 | struct dwarf2_section_info loclists; |
| 645 | struct dwarf2_section_info macinfo; |
| 646 | struct dwarf2_section_info macro; |
| 647 | struct dwarf2_section_info str; |
| 648 | struct dwarf2_section_info str_offsets; |
| 649 | /* In the case of a virtual DWO file, these two are unused. */ |
| 650 | struct dwarf2_section_info info; |
| 651 | std::vector<dwarf2_section_info> types; |
| 652 | }; |
| 653 | |
| 654 | /* CUs/TUs in DWP/DWO files. */ |
| 655 | |
| 656 | struct dwo_unit |
| 657 | { |
| 658 | /* Backlink to the containing struct dwo_file. */ |
| 659 | struct dwo_file *dwo_file; |
| 660 | |
| 661 | /* The "id" that distinguishes this CU/TU. |
| 662 | .debug_info calls this "dwo_id", .debug_types calls this "signature". |
| 663 | Since signatures came first, we stick with it for consistency. */ |
| 664 | ULONGEST signature; |
| 665 | |
| 666 | /* The section this CU/TU lives in, in the DWO file. */ |
| 667 | struct dwarf2_section_info *section; |
| 668 | |
| 669 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
| 670 | sect_offset sect_off; |
| 671 | unsigned int length; |
| 672 | |
| 673 | /* For types, offset in the type's DIE of the type defined by this TU. */ |
| 674 | cu_offset type_offset_in_tu; |
| 675 | }; |
| 676 | |
| 677 | /* include/dwarf2.h defines the DWP section codes. |
| 678 | It defines a max value but it doesn't define a min value, which we |
| 679 | use for error checking, so provide one. */ |
| 680 | |
| 681 | enum dwp_v2_section_ids |
| 682 | { |
| 683 | DW_SECT_MIN = 1 |
| 684 | }; |
| 685 | |
| 686 | /* Data for one DWO file. |
| 687 | |
| 688 | This includes virtual DWO files (a virtual DWO file is a DWO file as it |
| 689 | appears in a DWP file). DWP files don't really have DWO files per se - |
| 690 | comdat folding of types "loses" the DWO file they came from, and from |
| 691 | a high level view DWP files appear to contain a mass of random types. |
| 692 | However, to maintain consistency with the non-DWP case we pretend DWP |
| 693 | files contain virtual DWO files, and we assign each TU with one virtual |
| 694 | DWO file (generally based on the line and abbrev section offsets - |
| 695 | a heuristic that seems to work in practice). */ |
| 696 | |
| 697 | struct dwo_file |
| 698 | { |
| 699 | dwo_file () = default; |
| 700 | DISABLE_COPY_AND_ASSIGN (dwo_file); |
| 701 | |
| 702 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
| 703 | For virtual DWO files the name is constructed from the section offsets |
| 704 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files |
| 705 | from related CU+TUs. */ |
| 706 | const char *dwo_name = nullptr; |
| 707 | |
| 708 | /* The DW_AT_comp_dir attribute. */ |
| 709 | const char *comp_dir = nullptr; |
| 710 | |
| 711 | /* The bfd, when the file is open. Otherwise this is NULL. |
| 712 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ |
| 713 | gdb_bfd_ref_ptr dbfd; |
| 714 | |
| 715 | /* The sections that make up this DWO file. |
| 716 | Remember that for virtual DWO files in DWP V2, these are virtual |
| 717 | sections (for lack of a better name). */ |
| 718 | struct dwo_sections sections {}; |
| 719 | |
| 720 | /* The CUs in the file. |
| 721 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as |
| 722 | an extension to handle LLVM's Link Time Optimization output (where |
| 723 | multiple source files may be compiled into a single object/dwo pair). */ |
| 724 | htab_up cus; |
| 725 | |
| 726 | /* Table of TUs in the file. |
| 727 | Each element is a struct dwo_unit. */ |
| 728 | htab_up tus; |
| 729 | }; |
| 730 | |
| 731 | /* These sections are what may appear in a DWP file. */ |
| 732 | |
| 733 | struct dwp_sections |
| 734 | { |
| 735 | /* These are used by both DWP version 1 and 2. */ |
| 736 | struct dwarf2_section_info str; |
| 737 | struct dwarf2_section_info cu_index; |
| 738 | struct dwarf2_section_info tu_index; |
| 739 | |
| 740 | /* These are only used by DWP version 2 files. |
| 741 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other |
| 742 | sections are referenced by section number, and are not recorded here. |
| 743 | In DWP version 2 there is at most one copy of all these sections, each |
| 744 | section being (effectively) comprised of the concatenation of all of the |
| 745 | individual sections that exist in the version 1 format. |
| 746 | To keep the code simple we treat each of these concatenated pieces as a |
| 747 | section itself (a virtual section?). */ |
| 748 | struct dwarf2_section_info abbrev; |
| 749 | struct dwarf2_section_info info; |
| 750 | struct dwarf2_section_info line; |
| 751 | struct dwarf2_section_info loc; |
| 752 | struct dwarf2_section_info macinfo; |
| 753 | struct dwarf2_section_info macro; |
| 754 | struct dwarf2_section_info str_offsets; |
| 755 | struct dwarf2_section_info types; |
| 756 | }; |
| 757 | |
| 758 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
| 759 | A virtual DWO file is a DWO file as it appears in a DWP file. */ |
| 760 | |
| 761 | struct virtual_v1_dwo_sections |
| 762 | { |
| 763 | struct dwarf2_section_info abbrev; |
| 764 | struct dwarf2_section_info line; |
| 765 | struct dwarf2_section_info loc; |
| 766 | struct dwarf2_section_info macinfo; |
| 767 | struct dwarf2_section_info macro; |
| 768 | struct dwarf2_section_info str_offsets; |
| 769 | /* Each DWP hash table entry records one CU or one TU. |
| 770 | That is recorded here, and copied to dwo_unit.section. */ |
| 771 | struct dwarf2_section_info info_or_types; |
| 772 | }; |
| 773 | |
| 774 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
| 775 | In version 2, the sections of the DWO files are concatenated together |
| 776 | and stored in one section of that name. Thus each ELF section contains |
| 777 | several "virtual" sections. */ |
| 778 | |
| 779 | struct virtual_v2_dwo_sections |
| 780 | { |
| 781 | bfd_size_type abbrev_offset; |
| 782 | bfd_size_type abbrev_size; |
| 783 | |
| 784 | bfd_size_type line_offset; |
| 785 | bfd_size_type line_size; |
| 786 | |
| 787 | bfd_size_type loc_offset; |
| 788 | bfd_size_type loc_size; |
| 789 | |
| 790 | bfd_size_type macinfo_offset; |
| 791 | bfd_size_type macinfo_size; |
| 792 | |
| 793 | bfd_size_type macro_offset; |
| 794 | bfd_size_type macro_size; |
| 795 | |
| 796 | bfd_size_type str_offsets_offset; |
| 797 | bfd_size_type str_offsets_size; |
| 798 | |
| 799 | /* Each DWP hash table entry records one CU or one TU. |
| 800 | That is recorded here, and copied to dwo_unit.section. */ |
| 801 | bfd_size_type info_or_types_offset; |
| 802 | bfd_size_type info_or_types_size; |
| 803 | }; |
| 804 | |
| 805 | /* Contents of DWP hash tables. */ |
| 806 | |
| 807 | struct dwp_hash_table |
| 808 | { |
| 809 | uint32_t version, nr_columns; |
| 810 | uint32_t nr_units, nr_slots; |
| 811 | const gdb_byte *hash_table, *unit_table; |
| 812 | union |
| 813 | { |
| 814 | struct |
| 815 | { |
| 816 | const gdb_byte *indices; |
| 817 | } v1; |
| 818 | struct |
| 819 | { |
| 820 | /* This is indexed by column number and gives the id of the section |
| 821 | in that column. */ |
| 822 | #define MAX_NR_V2_DWO_SECTIONS \ |
| 823 | (1 /* .debug_info or .debug_types */ \ |
| 824 | + 1 /* .debug_abbrev */ \ |
| 825 | + 1 /* .debug_line */ \ |
| 826 | + 1 /* .debug_loc */ \ |
| 827 | + 1 /* .debug_str_offsets */ \ |
| 828 | + 1 /* .debug_macro or .debug_macinfo */) |
| 829 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; |
| 830 | const gdb_byte *offsets; |
| 831 | const gdb_byte *sizes; |
| 832 | } v2; |
| 833 | } section_pool; |
| 834 | }; |
| 835 | |
| 836 | /* Data for one DWP file. */ |
| 837 | |
| 838 | struct dwp_file |
| 839 | { |
| 840 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
| 841 | : name (name_), |
| 842 | dbfd (std::move (abfd)) |
| 843 | { |
| 844 | } |
| 845 | |
| 846 | /* Name of the file. */ |
| 847 | const char *name; |
| 848 | |
| 849 | /* File format version. */ |
| 850 | int version = 0; |
| 851 | |
| 852 | /* The bfd. */ |
| 853 | gdb_bfd_ref_ptr dbfd; |
| 854 | |
| 855 | /* Section info for this file. */ |
| 856 | struct dwp_sections sections {}; |
| 857 | |
| 858 | /* Table of CUs in the file. */ |
| 859 | const struct dwp_hash_table *cus = nullptr; |
| 860 | |
| 861 | /* Table of TUs in the file. */ |
| 862 | const struct dwp_hash_table *tus = nullptr; |
| 863 | |
| 864 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
| 865 | htab_up loaded_cus; |
| 866 | htab_up loaded_tus; |
| 867 | |
| 868 | /* Table to map ELF section numbers to their sections. |
| 869 | This is only needed for the DWP V1 file format. */ |
| 870 | unsigned int num_sections = 0; |
| 871 | asection **elf_sections = nullptr; |
| 872 | }; |
| 873 | |
| 874 | /* Struct used to pass misc. parameters to read_die_and_children, et |
| 875 | al. which are used for both .debug_info and .debug_types dies. |
| 876 | All parameters here are unchanging for the life of the call. This |
| 877 | struct exists to abstract away the constant parameters of die reading. */ |
| 878 | |
| 879 | struct die_reader_specs |
| 880 | { |
| 881 | /* The bfd of die_section. */ |
| 882 | bfd* abfd; |
| 883 | |
| 884 | /* The CU of the DIE we are parsing. */ |
| 885 | struct dwarf2_cu *cu; |
| 886 | |
| 887 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
| 888 | struct dwo_file *dwo_file; |
| 889 | |
| 890 | /* The section the die comes from. |
| 891 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
| 892 | struct dwarf2_section_info *die_section; |
| 893 | |
| 894 | /* die_section->buffer. */ |
| 895 | const gdb_byte *buffer; |
| 896 | |
| 897 | /* The end of the buffer. */ |
| 898 | const gdb_byte *buffer_end; |
| 899 | |
| 900 | /* The abbreviation table to use when reading the DIEs. */ |
| 901 | struct abbrev_table *abbrev_table; |
| 902 | }; |
| 903 | |
| 904 | /* A subclass of die_reader_specs that holds storage and has complex |
| 905 | constructor and destructor behavior. */ |
| 906 | |
| 907 | class cutu_reader : public die_reader_specs |
| 908 | { |
| 909 | public: |
| 910 | |
| 911 | cutu_reader (struct dwarf2_per_cu_data *this_cu, |
| 912 | struct abbrev_table *abbrev_table, |
| 913 | int use_existing_cu, |
| 914 | bool skip_partial); |
| 915 | |
| 916 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, |
| 917 | struct dwarf2_cu *parent_cu = nullptr, |
| 918 | struct dwo_file *dwo_file = nullptr); |
| 919 | |
| 920 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
| 921 | |
| 922 | const gdb_byte *info_ptr = nullptr; |
| 923 | struct die_info *comp_unit_die = nullptr; |
| 924 | bool dummy_p = false; |
| 925 | |
| 926 | /* Release the new CU, putting it on the chain. This cannot be done |
| 927 | for dummy CUs. */ |
| 928 | void keep (); |
| 929 | |
| 930 | private: |
| 931 | void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
| 932 | int use_existing_cu); |
| 933 | |
| 934 | struct dwarf2_per_cu_data *m_this_cu; |
| 935 | std::unique_ptr<dwarf2_cu> m_new_cu; |
| 936 | |
| 937 | /* The ordinary abbreviation table. */ |
| 938 | abbrev_table_up m_abbrev_table_holder; |
| 939 | |
| 940 | /* The DWO abbreviation table. */ |
| 941 | abbrev_table_up m_dwo_abbrev_table; |
| 942 | }; |
| 943 | |
| 944 | /* When we construct a partial symbol table entry we only |
| 945 | need this much information. */ |
| 946 | struct partial_die_info : public allocate_on_obstack |
| 947 | { |
| 948 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
| 949 | |
| 950 | /* Disable assign but still keep copy ctor, which is needed |
| 951 | load_partial_dies. */ |
| 952 | partial_die_info& operator=(const partial_die_info& rhs) = delete; |
| 953 | |
| 954 | /* Adjust the partial die before generating a symbol for it. This |
| 955 | function may set the is_external flag or change the DIE's |
| 956 | name. */ |
| 957 | void fixup (struct dwarf2_cu *cu); |
| 958 | |
| 959 | /* Read a minimal amount of information into the minimal die |
| 960 | structure. */ |
| 961 | const gdb_byte *read (const struct die_reader_specs *reader, |
| 962 | const struct abbrev_info &abbrev, |
| 963 | const gdb_byte *info_ptr); |
| 964 | |
| 965 | /* Offset of this DIE. */ |
| 966 | const sect_offset sect_off; |
| 967 | |
| 968 | /* DWARF-2 tag for this DIE. */ |
| 969 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
| 970 | |
| 971 | /* Assorted flags describing the data found in this DIE. */ |
| 972 | const unsigned int has_children : 1; |
| 973 | |
| 974 | unsigned int is_external : 1; |
| 975 | unsigned int is_declaration : 1; |
| 976 | unsigned int has_type : 1; |
| 977 | unsigned int has_specification : 1; |
| 978 | unsigned int has_pc_info : 1; |
| 979 | unsigned int may_be_inlined : 1; |
| 980 | |
| 981 | /* This DIE has been marked DW_AT_main_subprogram. */ |
| 982 | unsigned int main_subprogram : 1; |
| 983 | |
| 984 | /* Flag set if the SCOPE field of this structure has been |
| 985 | computed. */ |
| 986 | unsigned int scope_set : 1; |
| 987 | |
| 988 | /* Flag set if the DIE has a byte_size attribute. */ |
| 989 | unsigned int has_byte_size : 1; |
| 990 | |
| 991 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
| 992 | unsigned int has_const_value : 1; |
| 993 | |
| 994 | /* Flag set if any of the DIE's children are template arguments. */ |
| 995 | unsigned int has_template_arguments : 1; |
| 996 | |
| 997 | /* Flag set if fixup has been called on this die. */ |
| 998 | unsigned int fixup_called : 1; |
| 999 | |
| 1000 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
| 1001 | unsigned int is_dwz : 1; |
| 1002 | |
| 1003 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ |
| 1004 | unsigned int spec_is_dwz : 1; |
| 1005 | |
| 1006 | /* The name of this DIE. Normally the value of DW_AT_name, but |
| 1007 | sometimes a default name for unnamed DIEs. */ |
| 1008 | const char *name = nullptr; |
| 1009 | |
| 1010 | /* The linkage name, if present. */ |
| 1011 | const char *linkage_name = nullptr; |
| 1012 | |
| 1013 | /* The scope to prepend to our children. This is generally |
| 1014 | allocated on the comp_unit_obstack, so will disappear |
| 1015 | when this compilation unit leaves the cache. */ |
| 1016 | const char *scope = nullptr; |
| 1017 | |
| 1018 | /* Some data associated with the partial DIE. The tag determines |
| 1019 | which field is live. */ |
| 1020 | union |
| 1021 | { |
| 1022 | /* The location description associated with this DIE, if any. */ |
| 1023 | struct dwarf_block *locdesc; |
| 1024 | /* The offset of an import, for DW_TAG_imported_unit. */ |
| 1025 | sect_offset sect_off; |
| 1026 | } d {}; |
| 1027 | |
| 1028 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ |
| 1029 | CORE_ADDR lowpc = 0; |
| 1030 | CORE_ADDR highpc = 0; |
| 1031 | |
| 1032 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
| 1033 | DW_AT_sibling, if any. */ |
| 1034 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
| 1035 | could return DW_AT_sibling values to its caller load_partial_dies. */ |
| 1036 | const gdb_byte *sibling = nullptr; |
| 1037 | |
| 1038 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by |
| 1039 | DW_AT_specification (or DW_AT_abstract_origin or |
| 1040 | DW_AT_extension). */ |
| 1041 | sect_offset spec_offset {}; |
| 1042 | |
| 1043 | /* Pointers to this DIE's parent, first child, and next sibling, |
| 1044 | if any. */ |
| 1045 | struct partial_die_info *die_parent = nullptr; |
| 1046 | struct partial_die_info *die_child = nullptr; |
| 1047 | struct partial_die_info *die_sibling = nullptr; |
| 1048 | |
| 1049 | friend struct partial_die_info * |
| 1050 | dwarf2_cu::find_partial_die (sect_offset sect_off); |
| 1051 | |
| 1052 | private: |
| 1053 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ |
| 1054 | partial_die_info (sect_offset sect_off) |
| 1055 | : partial_die_info (sect_off, DW_TAG_padding, 0) |
| 1056 | { |
| 1057 | } |
| 1058 | |
| 1059 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, |
| 1060 | int has_children_) |
| 1061 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) |
| 1062 | { |
| 1063 | is_external = 0; |
| 1064 | is_declaration = 0; |
| 1065 | has_type = 0; |
| 1066 | has_specification = 0; |
| 1067 | has_pc_info = 0; |
| 1068 | may_be_inlined = 0; |
| 1069 | main_subprogram = 0; |
| 1070 | scope_set = 0; |
| 1071 | has_byte_size = 0; |
| 1072 | has_const_value = 0; |
| 1073 | has_template_arguments = 0; |
| 1074 | fixup_called = 0; |
| 1075 | is_dwz = 0; |
| 1076 | spec_is_dwz = 0; |
| 1077 | } |
| 1078 | }; |
| 1079 | |
| 1080 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
| 1081 | but this would require a corresponding change in unpack_field_as_long |
| 1082 | and friends. */ |
| 1083 | static int bits_per_byte = 8; |
| 1084 | |
| 1085 | struct variant_part_builder; |
| 1086 | |
| 1087 | /* When reading a variant, we track a bit more information about the |
| 1088 | field, and store it in an object of this type. */ |
| 1089 | |
| 1090 | struct variant_field |
| 1091 | { |
| 1092 | int first_field = -1; |
| 1093 | int last_field = -1; |
| 1094 | |
| 1095 | /* A variant can contain other variant parts. */ |
| 1096 | std::vector<variant_part_builder> variant_parts; |
| 1097 | |
| 1098 | /* If we see a DW_TAG_variant, then this will be set if this is the |
| 1099 | default branch. */ |
| 1100 | bool default_branch = false; |
| 1101 | /* If we see a DW_AT_discr_value, then this will be the discriminant |
| 1102 | value. */ |
| 1103 | ULONGEST discriminant_value = 0; |
| 1104 | /* If we see a DW_AT_discr_list, then this is a pointer to the list |
| 1105 | data. */ |
| 1106 | struct dwarf_block *discr_list_data = nullptr; |
| 1107 | }; |
| 1108 | |
| 1109 | /* This represents a DW_TAG_variant_part. */ |
| 1110 | |
| 1111 | struct variant_part_builder |
| 1112 | { |
| 1113 | /* The offset of the discriminant field. */ |
| 1114 | sect_offset discriminant_offset {}; |
| 1115 | |
| 1116 | /* Variants that are direct children of this variant part. */ |
| 1117 | std::vector<variant_field> variants; |
| 1118 | |
| 1119 | /* True if we're currently reading a variant. */ |
| 1120 | bool processing_variant = false; |
| 1121 | }; |
| 1122 | |
| 1123 | struct nextfield |
| 1124 | { |
| 1125 | int accessibility = 0; |
| 1126 | int virtuality = 0; |
| 1127 | /* Variant parts need to find the discriminant, which is a DIE |
| 1128 | reference. We track the section offset of each field to make |
| 1129 | this link. */ |
| 1130 | sect_offset offset; |
| 1131 | struct field field {}; |
| 1132 | }; |
| 1133 | |
| 1134 | struct fnfieldlist |
| 1135 | { |
| 1136 | const char *name = nullptr; |
| 1137 | std::vector<struct fn_field> fnfields; |
| 1138 | }; |
| 1139 | |
| 1140 | /* The routines that read and process dies for a C struct or C++ class |
| 1141 | pass lists of data member fields and lists of member function fields |
| 1142 | in an instance of a field_info structure, as defined below. */ |
| 1143 | struct field_info |
| 1144 | { |
| 1145 | /* List of data member and baseclasses fields. */ |
| 1146 | std::vector<struct nextfield> fields; |
| 1147 | std::vector<struct nextfield> baseclasses; |
| 1148 | |
| 1149 | /* Set if the accessibility of one of the fields is not public. */ |
| 1150 | int non_public_fields = 0; |
| 1151 | |
| 1152 | /* Member function fieldlist array, contains name of possibly overloaded |
| 1153 | member function, number of overloaded member functions and a pointer |
| 1154 | to the head of the member function field chain. */ |
| 1155 | std::vector<struct fnfieldlist> fnfieldlists; |
| 1156 | |
| 1157 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of |
| 1158 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ |
| 1159 | std::vector<struct decl_field> typedef_field_list; |
| 1160 | |
| 1161 | /* Nested types defined by this class and the number of elements in this |
| 1162 | list. */ |
| 1163 | std::vector<struct decl_field> nested_types_list; |
| 1164 | |
| 1165 | /* If non-null, this is the variant part we are currently |
| 1166 | reading. */ |
| 1167 | variant_part_builder *current_variant_part = nullptr; |
| 1168 | /* This holds all the top-level variant parts attached to the type |
| 1169 | we're reading. */ |
| 1170 | std::vector<variant_part_builder> variant_parts; |
| 1171 | |
| 1172 | /* Return the total number of fields (including baseclasses). */ |
| 1173 | int nfields () const |
| 1174 | { |
| 1175 | return fields.size () + baseclasses.size (); |
| 1176 | } |
| 1177 | }; |
| 1178 | |
| 1179 | /* Loaded secondary compilation units are kept in memory until they |
| 1180 | have not been referenced for the processing of this many |
| 1181 | compilation units. Set this to zero to disable caching. Cache |
| 1182 | sizes of up to at least twenty will improve startup time for |
| 1183 | typical inter-CU-reference binaries, at an obvious memory cost. */ |
| 1184 | static int dwarf_max_cache_age = 5; |
| 1185 | static void |
| 1186 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
| 1187 | struct cmd_list_element *c, const char *value) |
| 1188 | { |
| 1189 | fprintf_filtered (file, _("The upper bound on the age of cached " |
| 1190 | "DWARF compilation units is %s.\n"), |
| 1191 | value); |
| 1192 | } |
| 1193 | \f |
| 1194 | /* local function prototypes */ |
| 1195 | |
| 1196 | static void dwarf2_find_base_address (struct die_info *die, |
| 1197 | struct dwarf2_cu *cu); |
| 1198 | |
| 1199 | static dwarf2_psymtab *create_partial_symtab |
| 1200 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
| 1201 | |
| 1202 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
| 1203 | const gdb_byte *info_ptr, |
| 1204 | struct die_info *type_unit_die); |
| 1205 | |
| 1206 | static void dwarf2_build_psymtabs_hard |
| 1207 | (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1208 | |
| 1209 | static void scan_partial_symbols (struct partial_die_info *, |
| 1210 | CORE_ADDR *, CORE_ADDR *, |
| 1211 | int, struct dwarf2_cu *); |
| 1212 | |
| 1213 | static void add_partial_symbol (struct partial_die_info *, |
| 1214 | struct dwarf2_cu *); |
| 1215 | |
| 1216 | static void add_partial_namespace (struct partial_die_info *pdi, |
| 1217 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1218 | int set_addrmap, struct dwarf2_cu *cu); |
| 1219 | |
| 1220 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
| 1221 | CORE_ADDR *highpc, int set_addrmap, |
| 1222 | struct dwarf2_cu *cu); |
| 1223 | |
| 1224 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
| 1225 | struct dwarf2_cu *cu); |
| 1226 | |
| 1227 | static void add_partial_subprogram (struct partial_die_info *pdi, |
| 1228 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1229 | int need_pc, struct dwarf2_cu *cu); |
| 1230 | |
| 1231 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
| 1232 | |
| 1233 | static struct partial_die_info *load_partial_dies |
| 1234 | (const struct die_reader_specs *, const gdb_byte *, int); |
| 1235 | |
| 1236 | /* A pair of partial_die_info and compilation unit. */ |
| 1237 | struct cu_partial_die_info |
| 1238 | { |
| 1239 | /* The compilation unit of the partial_die_info. */ |
| 1240 | struct dwarf2_cu *cu; |
| 1241 | /* A partial_die_info. */ |
| 1242 | struct partial_die_info *pdi; |
| 1243 | |
| 1244 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) |
| 1245 | : cu (cu), |
| 1246 | pdi (pdi) |
| 1247 | { /* Nothing. */ } |
| 1248 | |
| 1249 | private: |
| 1250 | cu_partial_die_info () = delete; |
| 1251 | }; |
| 1252 | |
| 1253 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
| 1254 | struct dwarf2_cu *); |
| 1255 | |
| 1256 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
| 1257 | struct attribute *, struct attr_abbrev *, |
| 1258 | const gdb_byte *, bool *need_reprocess); |
| 1259 | |
| 1260 | static void read_attribute_reprocess (const struct die_reader_specs *reader, |
| 1261 | struct attribute *attr); |
| 1262 | |
| 1263 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); |
| 1264 | |
| 1265 | static sect_offset read_abbrev_offset |
| 1266 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 1267 | struct dwarf2_section_info *, sect_offset); |
| 1268 | |
| 1269 | static const char *read_indirect_string |
| 1270 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, |
| 1271 | const struct comp_unit_head *, unsigned int *); |
| 1272 | |
| 1273 | static const char *read_indirect_string_at_offset |
| 1274 | (struct dwarf2_per_objfile *dwarf2_per_objfile, LONGEST str_offset); |
| 1275 | |
| 1276 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
| 1277 | const gdb_byte *, |
| 1278 | unsigned int *); |
| 1279 | |
| 1280 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
| 1281 | ULONGEST str_index); |
| 1282 | |
| 1283 | static const char *read_stub_str_index (struct dwarf2_cu *cu, |
| 1284 | ULONGEST str_index); |
| 1285 | |
| 1286 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
| 1287 | |
| 1288 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
| 1289 | struct dwarf2_cu *); |
| 1290 | |
| 1291 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
| 1292 | struct dwarf2_cu *cu); |
| 1293 | |
| 1294 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
| 1295 | |
| 1296 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
| 1297 | struct dwarf2_cu *cu); |
| 1298 | |
| 1299 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
| 1300 | |
| 1301 | static struct die_info *die_specification (struct die_info *die, |
| 1302 | struct dwarf2_cu **); |
| 1303 | |
| 1304 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
| 1305 | struct dwarf2_cu *cu); |
| 1306 | |
| 1307 | static void dwarf_decode_lines (struct line_header *, const char *, |
| 1308 | struct dwarf2_cu *, dwarf2_psymtab *, |
| 1309 | CORE_ADDR, int decode_mapping); |
| 1310 | |
| 1311 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
| 1312 | const char *); |
| 1313 | |
| 1314 | static struct symbol *new_symbol (struct die_info *, struct type *, |
| 1315 | struct dwarf2_cu *, struct symbol * = NULL); |
| 1316 | |
| 1317 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
| 1318 | struct dwarf2_cu *); |
| 1319 | |
| 1320 | static void dwarf2_const_value_attr (const struct attribute *attr, |
| 1321 | struct type *type, |
| 1322 | const char *name, |
| 1323 | struct obstack *obstack, |
| 1324 | struct dwarf2_cu *cu, LONGEST *value, |
| 1325 | const gdb_byte **bytes, |
| 1326 | struct dwarf2_locexpr_baton **baton); |
| 1327 | |
| 1328 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
| 1329 | |
| 1330 | static int need_gnat_info (struct dwarf2_cu *); |
| 1331 | |
| 1332 | static struct type *die_descriptive_type (struct die_info *, |
| 1333 | struct dwarf2_cu *); |
| 1334 | |
| 1335 | static void set_descriptive_type (struct type *, struct die_info *, |
| 1336 | struct dwarf2_cu *); |
| 1337 | |
| 1338 | static struct type *die_containing_type (struct die_info *, |
| 1339 | struct dwarf2_cu *); |
| 1340 | |
| 1341 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
| 1342 | struct dwarf2_cu *); |
| 1343 | |
| 1344 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
| 1345 | |
| 1346 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
| 1347 | |
| 1348 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
| 1349 | |
| 1350 | static char *typename_concat (struct obstack *obs, const char *prefix, |
| 1351 | const char *suffix, int physname, |
| 1352 | struct dwarf2_cu *cu); |
| 1353 | |
| 1354 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
| 1355 | |
| 1356 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
| 1357 | |
| 1358 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
| 1359 | |
| 1360 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
| 1361 | |
| 1362 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
| 1363 | |
| 1364 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
| 1365 | |
| 1366 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
| 1367 | struct dwarf2_cu *, dwarf2_psymtab *); |
| 1368 | |
| 1369 | /* Return the .debug_loclists section to use for cu. */ |
| 1370 | static struct dwarf2_section_info *cu_debug_loc_section (struct dwarf2_cu *cu); |
| 1371 | |
| 1372 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
| 1373 | values. Keep the items ordered with increasing constraints compliance. */ |
| 1374 | enum pc_bounds_kind |
| 1375 | { |
| 1376 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
| 1377 | PC_BOUNDS_NOT_PRESENT, |
| 1378 | |
| 1379 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
| 1380 | were present but they do not form a valid range of PC addresses. */ |
| 1381 | PC_BOUNDS_INVALID, |
| 1382 | |
| 1383 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
| 1384 | PC_BOUNDS_RANGES, |
| 1385 | |
| 1386 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ |
| 1387 | PC_BOUNDS_HIGH_LOW, |
| 1388 | }; |
| 1389 | |
| 1390 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, |
| 1391 | CORE_ADDR *, CORE_ADDR *, |
| 1392 | struct dwarf2_cu *, |
| 1393 | dwarf2_psymtab *); |
| 1394 | |
| 1395 | static void get_scope_pc_bounds (struct die_info *, |
| 1396 | CORE_ADDR *, CORE_ADDR *, |
| 1397 | struct dwarf2_cu *); |
| 1398 | |
| 1399 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
| 1400 | CORE_ADDR, struct dwarf2_cu *); |
| 1401 | |
| 1402 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
| 1403 | struct dwarf2_cu *); |
| 1404 | |
| 1405 | static void dwarf2_attach_fields_to_type (struct field_info *, |
| 1406 | struct type *, struct dwarf2_cu *); |
| 1407 | |
| 1408 | static void dwarf2_add_member_fn (struct field_info *, |
| 1409 | struct die_info *, struct type *, |
| 1410 | struct dwarf2_cu *); |
| 1411 | |
| 1412 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
| 1413 | struct type *, |
| 1414 | struct dwarf2_cu *); |
| 1415 | |
| 1416 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
| 1417 | |
| 1418 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
| 1419 | |
| 1420 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
| 1421 | |
| 1422 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
| 1423 | |
| 1424 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
| 1425 | |
| 1426 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
| 1427 | |
| 1428 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
| 1429 | |
| 1430 | static struct type *read_module_type (struct die_info *die, |
| 1431 | struct dwarf2_cu *cu); |
| 1432 | |
| 1433 | static const char *namespace_name (struct die_info *die, |
| 1434 | int *is_anonymous, struct dwarf2_cu *); |
| 1435 | |
| 1436 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
| 1437 | |
| 1438 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *, |
| 1439 | bool * = nullptr); |
| 1440 | |
| 1441 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
| 1442 | struct dwarf2_cu *); |
| 1443 | |
| 1444 | static struct die_info *read_die_and_siblings_1 |
| 1445 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
| 1446 | struct die_info *); |
| 1447 | |
| 1448 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
| 1449 | const gdb_byte *info_ptr, |
| 1450 | const gdb_byte **new_info_ptr, |
| 1451 | struct die_info *parent); |
| 1452 | |
| 1453 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
| 1454 | struct die_info **, const gdb_byte *, |
| 1455 | int); |
| 1456 | |
| 1457 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
| 1458 | struct die_info **, const gdb_byte *); |
| 1459 | |
| 1460 | static void process_die (struct die_info *, struct dwarf2_cu *); |
| 1461 | |
| 1462 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
| 1463 | struct objfile *); |
| 1464 | |
| 1465 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
| 1466 | |
| 1467 | static const char *dwarf2_full_name (const char *name, |
| 1468 | struct die_info *die, |
| 1469 | struct dwarf2_cu *cu); |
| 1470 | |
| 1471 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
| 1472 | struct dwarf2_cu *cu); |
| 1473 | |
| 1474 | static struct die_info *dwarf2_extension (struct die_info *die, |
| 1475 | struct dwarf2_cu **); |
| 1476 | |
| 1477 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
| 1478 | |
| 1479 | static void dump_die_for_error (struct die_info *); |
| 1480 | |
| 1481 | static void dump_die_1 (struct ui_file *, int level, int max_level, |
| 1482 | struct die_info *); |
| 1483 | |
| 1484 | /*static*/ void dump_die (struct die_info *, int max_level); |
| 1485 | |
| 1486 | static void store_in_ref_table (struct die_info *, |
| 1487 | struct dwarf2_cu *); |
| 1488 | |
| 1489 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
| 1490 | const struct attribute *, |
| 1491 | struct dwarf2_cu **); |
| 1492 | |
| 1493 | static struct die_info *follow_die_ref (struct die_info *, |
| 1494 | const struct attribute *, |
| 1495 | struct dwarf2_cu **); |
| 1496 | |
| 1497 | static struct die_info *follow_die_sig (struct die_info *, |
| 1498 | const struct attribute *, |
| 1499 | struct dwarf2_cu **); |
| 1500 | |
| 1501 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
| 1502 | struct dwarf2_cu *); |
| 1503 | |
| 1504 | static struct type *get_DW_AT_signature_type (struct die_info *, |
| 1505 | const struct attribute *, |
| 1506 | struct dwarf2_cu *); |
| 1507 | |
| 1508 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
| 1509 | |
| 1510 | static void read_signatured_type (struct signatured_type *); |
| 1511 | |
| 1512 | static int attr_to_dynamic_prop (const struct attribute *attr, |
| 1513 | struct die_info *die, struct dwarf2_cu *cu, |
| 1514 | struct dynamic_prop *prop, struct type *type); |
| 1515 | |
| 1516 | /* memory allocation interface */ |
| 1517 | |
| 1518 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
| 1519 | |
| 1520 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
| 1521 | |
| 1522 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
| 1523 | |
| 1524 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
| 1525 | struct dwarf2_loclist_baton *baton, |
| 1526 | const struct attribute *attr); |
| 1527 | |
| 1528 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
| 1529 | struct symbol *sym, |
| 1530 | struct dwarf2_cu *cu, |
| 1531 | int is_block); |
| 1532 | |
| 1533 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
| 1534 | const gdb_byte *info_ptr, |
| 1535 | struct abbrev_info *abbrev); |
| 1536 | |
| 1537 | static hashval_t partial_die_hash (const void *item); |
| 1538 | |
| 1539 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); |
| 1540 | |
| 1541 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
| 1542 | (sect_offset sect_off, unsigned int offset_in_dwz, |
| 1543 | struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1544 | |
| 1545 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
| 1546 | struct die_info *comp_unit_die, |
| 1547 | enum language pretend_language); |
| 1548 | |
| 1549 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1550 | |
| 1551 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
| 1552 | |
| 1553 | static struct type *set_die_type (struct die_info *, struct type *, |
| 1554 | struct dwarf2_cu *); |
| 1555 | |
| 1556 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1557 | |
| 1558 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1559 | |
| 1560 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
| 1561 | enum language); |
| 1562 | |
| 1563 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
| 1564 | enum language); |
| 1565 | |
| 1566 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
| 1567 | enum language); |
| 1568 | |
| 1569 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
| 1570 | struct dwarf2_per_cu_data *); |
| 1571 | |
| 1572 | static void dwarf2_mark (struct dwarf2_cu *); |
| 1573 | |
| 1574 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); |
| 1575 | |
| 1576 | static struct type *get_die_type_at_offset (sect_offset, |
| 1577 | struct dwarf2_per_cu_data *); |
| 1578 | |
| 1579 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
| 1580 | |
| 1581 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 1582 | enum language pretend_language); |
| 1583 | |
| 1584 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1585 | |
| 1586 | /* Class, the destructor of which frees all allocated queue entries. This |
| 1587 | will only have work to do if an error was thrown while processing the |
| 1588 | dwarf. If no error was thrown then the queue entries should have all |
| 1589 | been processed, and freed, as we went along. */ |
| 1590 | |
| 1591 | class dwarf2_queue_guard |
| 1592 | { |
| 1593 | public: |
| 1594 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
| 1595 | : m_per_objfile (per_objfile) |
| 1596 | { |
| 1597 | } |
| 1598 | |
| 1599 | /* Free any entries remaining on the queue. There should only be |
| 1600 | entries left if we hit an error while processing the dwarf. */ |
| 1601 | ~dwarf2_queue_guard () |
| 1602 | { |
| 1603 | /* Ensure that no memory is allocated by the queue. */ |
| 1604 | std::queue<dwarf2_queue_item> empty; |
| 1605 | std::swap (m_per_objfile->queue, empty); |
| 1606 | } |
| 1607 | |
| 1608 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
| 1609 | |
| 1610 | private: |
| 1611 | dwarf2_per_objfile *m_per_objfile; |
| 1612 | }; |
| 1613 | |
| 1614 | dwarf2_queue_item::~dwarf2_queue_item () |
| 1615 | { |
| 1616 | /* Anything still marked queued is likely to be in an |
| 1617 | inconsistent state, so discard it. */ |
| 1618 | if (per_cu->queued) |
| 1619 | { |
| 1620 | if (per_cu->cu != NULL) |
| 1621 | free_one_cached_comp_unit (per_cu); |
| 1622 | per_cu->queued = 0; |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | /* The return type of find_file_and_directory. Note, the enclosed |
| 1627 | string pointers are only valid while this object is valid. */ |
| 1628 | |
| 1629 | struct file_and_directory |
| 1630 | { |
| 1631 | /* The filename. This is never NULL. */ |
| 1632 | const char *name; |
| 1633 | |
| 1634 | /* The compilation directory. NULL if not known. If we needed to |
| 1635 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, |
| 1636 | points directly to the DW_AT_comp_dir string attribute owned by |
| 1637 | the obstack that owns the DIE. */ |
| 1638 | const char *comp_dir; |
| 1639 | |
| 1640 | /* If we needed to build a new string for comp_dir, this is what |
| 1641 | owns the storage. */ |
| 1642 | std::string comp_dir_storage; |
| 1643 | }; |
| 1644 | |
| 1645 | static file_and_directory find_file_and_directory (struct die_info *die, |
| 1646 | struct dwarf2_cu *cu); |
| 1647 | |
| 1648 | static htab_up allocate_signatured_type_table (); |
| 1649 | |
| 1650 | static htab_up allocate_dwo_unit_table (); |
| 1651 | |
| 1652 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
| 1653 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 1654 | struct dwp_file *dwp_file, const char *comp_dir, |
| 1655 | ULONGEST signature, int is_debug_types); |
| 1656 | |
| 1657 | static struct dwp_file *get_dwp_file |
| 1658 | (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1659 | |
| 1660 | static struct dwo_unit *lookup_dwo_comp_unit |
| 1661 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
| 1662 | |
| 1663 | static struct dwo_unit *lookup_dwo_type_unit |
| 1664 | (struct signatured_type *, const char *, const char *); |
| 1665 | |
| 1666 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
| 1667 | |
| 1668 | /* A unique pointer to a dwo_file. */ |
| 1669 | |
| 1670 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
| 1671 | |
| 1672 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1673 | |
| 1674 | static void check_producer (struct dwarf2_cu *cu); |
| 1675 | |
| 1676 | static void free_line_header_voidp (void *arg); |
| 1677 | \f |
| 1678 | /* Various complaints about symbol reading that don't abort the process. */ |
| 1679 | |
| 1680 | static void |
| 1681 | dwarf2_debug_line_missing_file_complaint (void) |
| 1682 | { |
| 1683 | complaint (_(".debug_line section has line data without a file")); |
| 1684 | } |
| 1685 | |
| 1686 | static void |
| 1687 | dwarf2_debug_line_missing_end_sequence_complaint (void) |
| 1688 | { |
| 1689 | complaint (_(".debug_line section has line " |
| 1690 | "program sequence without an end")); |
| 1691 | } |
| 1692 | |
| 1693 | static void |
| 1694 | dwarf2_complex_location_expr_complaint (void) |
| 1695 | { |
| 1696 | complaint (_("location expression too complex")); |
| 1697 | } |
| 1698 | |
| 1699 | static void |
| 1700 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, |
| 1701 | int arg3) |
| 1702 | { |
| 1703 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
| 1704 | arg1, arg2, arg3); |
| 1705 | } |
| 1706 | |
| 1707 | static void |
| 1708 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) |
| 1709 | { |
| 1710 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
| 1711 | arg1, arg2); |
| 1712 | } |
| 1713 | |
| 1714 | /* Hash function for line_header_hash. */ |
| 1715 | |
| 1716 | static hashval_t |
| 1717 | line_header_hash (const struct line_header *ofs) |
| 1718 | { |
| 1719 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
| 1720 | } |
| 1721 | |
| 1722 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ |
| 1723 | |
| 1724 | static hashval_t |
| 1725 | line_header_hash_voidp (const void *item) |
| 1726 | { |
| 1727 | const struct line_header *ofs = (const struct line_header *) item; |
| 1728 | |
| 1729 | return line_header_hash (ofs); |
| 1730 | } |
| 1731 | |
| 1732 | /* Equality function for line_header_hash. */ |
| 1733 | |
| 1734 | static int |
| 1735 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) |
| 1736 | { |
| 1737 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
| 1738 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; |
| 1739 | |
| 1740 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
| 1741 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
| 1742 | } |
| 1743 | |
| 1744 | \f |
| 1745 | |
| 1746 | /* See declaration. */ |
| 1747 | |
| 1748 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, |
| 1749 | const dwarf2_debug_sections *names, |
| 1750 | bool can_copy_) |
| 1751 | : objfile (objfile_), |
| 1752 | can_copy (can_copy_) |
| 1753 | { |
| 1754 | if (names == NULL) |
| 1755 | names = &dwarf2_elf_names; |
| 1756 | |
| 1757 | bfd *obfd = objfile->obfd; |
| 1758 | |
| 1759 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) |
| 1760 | locate_sections (obfd, sec, *names); |
| 1761 | } |
| 1762 | |
| 1763 | dwarf2_per_objfile::~dwarf2_per_objfile () |
| 1764 | { |
| 1765 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ |
| 1766 | free_cached_comp_units (); |
| 1767 | |
| 1768 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
| 1769 | per_cu->imported_symtabs_free (); |
| 1770 | |
| 1771 | for (signatured_type *sig_type : all_type_units) |
| 1772 | sig_type->per_cu.imported_symtabs_free (); |
| 1773 | |
| 1774 | /* Everything else should be on the objfile obstack. */ |
| 1775 | } |
| 1776 | |
| 1777 | /* See declaration. */ |
| 1778 | |
| 1779 | void |
| 1780 | dwarf2_per_objfile::free_cached_comp_units () |
| 1781 | { |
| 1782 | dwarf2_per_cu_data *per_cu = read_in_chain; |
| 1783 | dwarf2_per_cu_data **last_chain = &read_in_chain; |
| 1784 | while (per_cu != NULL) |
| 1785 | { |
| 1786 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; |
| 1787 | |
| 1788 | delete per_cu->cu; |
| 1789 | *last_chain = next_cu; |
| 1790 | per_cu = next_cu; |
| 1791 | } |
| 1792 | } |
| 1793 | |
| 1794 | /* A helper class that calls free_cached_comp_units on |
| 1795 | destruction. */ |
| 1796 | |
| 1797 | class free_cached_comp_units |
| 1798 | { |
| 1799 | public: |
| 1800 | |
| 1801 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) |
| 1802 | : m_per_objfile (per_objfile) |
| 1803 | { |
| 1804 | } |
| 1805 | |
| 1806 | ~free_cached_comp_units () |
| 1807 | { |
| 1808 | m_per_objfile->free_cached_comp_units (); |
| 1809 | } |
| 1810 | |
| 1811 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); |
| 1812 | |
| 1813 | private: |
| 1814 | |
| 1815 | dwarf2_per_objfile *m_per_objfile; |
| 1816 | }; |
| 1817 | |
| 1818 | /* Try to locate the sections we need for DWARF 2 debugging |
| 1819 | information and return true if we have enough to do something. |
| 1820 | NAMES points to the dwarf2 section names, or is NULL if the standard |
| 1821 | ELF names are used. CAN_COPY is true for formats where symbol |
| 1822 | interposition is possible and so symbol values must follow copy |
| 1823 | relocation rules. */ |
| 1824 | |
| 1825 | int |
| 1826 | dwarf2_has_info (struct objfile *objfile, |
| 1827 | const struct dwarf2_debug_sections *names, |
| 1828 | bool can_copy) |
| 1829 | { |
| 1830 | if (objfile->flags & OBJF_READNEVER) |
| 1831 | return 0; |
| 1832 | |
| 1833 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 1834 | = get_dwarf2_per_objfile (objfile); |
| 1835 | |
| 1836 | if (dwarf2_per_objfile == NULL) |
| 1837 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
| 1838 | names, |
| 1839 | can_copy); |
| 1840 | |
| 1841 | return (!dwarf2_per_objfile->info.is_virtual |
| 1842 | && dwarf2_per_objfile->info.s.section != NULL |
| 1843 | && !dwarf2_per_objfile->abbrev.is_virtual |
| 1844 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
| 1845 | } |
| 1846 | |
| 1847 | /* When loading sections, we look either for uncompressed section or for |
| 1848 | compressed section names. */ |
| 1849 | |
| 1850 | static int |
| 1851 | section_is_p (const char *section_name, |
| 1852 | const struct dwarf2_section_names *names) |
| 1853 | { |
| 1854 | if (names->normal != NULL |
| 1855 | && strcmp (section_name, names->normal) == 0) |
| 1856 | return 1; |
| 1857 | if (names->compressed != NULL |
| 1858 | && strcmp (section_name, names->compressed) == 0) |
| 1859 | return 1; |
| 1860 | return 0; |
| 1861 | } |
| 1862 | |
| 1863 | /* See declaration. */ |
| 1864 | |
| 1865 | void |
| 1866 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, |
| 1867 | const dwarf2_debug_sections &names) |
| 1868 | { |
| 1869 | flagword aflag = bfd_section_flags (sectp); |
| 1870 | |
| 1871 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
| 1872 | { |
| 1873 | } |
| 1874 | else if (elf_section_data (sectp)->this_hdr.sh_size |
| 1875 | > bfd_get_file_size (abfd)) |
| 1876 | { |
| 1877 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; |
| 1878 | warning (_("Discarding section %s which has a section size (%s" |
| 1879 | ") larger than the file size [in module %s]"), |
| 1880 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), |
| 1881 | bfd_get_filename (abfd)); |
| 1882 | } |
| 1883 | else if (section_is_p (sectp->name, &names.info)) |
| 1884 | { |
| 1885 | this->info.s.section = sectp; |
| 1886 | this->info.size = bfd_section_size (sectp); |
| 1887 | } |
| 1888 | else if (section_is_p (sectp->name, &names.abbrev)) |
| 1889 | { |
| 1890 | this->abbrev.s.section = sectp; |
| 1891 | this->abbrev.size = bfd_section_size (sectp); |
| 1892 | } |
| 1893 | else if (section_is_p (sectp->name, &names.line)) |
| 1894 | { |
| 1895 | this->line.s.section = sectp; |
| 1896 | this->line.size = bfd_section_size (sectp); |
| 1897 | } |
| 1898 | else if (section_is_p (sectp->name, &names.loc)) |
| 1899 | { |
| 1900 | this->loc.s.section = sectp; |
| 1901 | this->loc.size = bfd_section_size (sectp); |
| 1902 | } |
| 1903 | else if (section_is_p (sectp->name, &names.loclists)) |
| 1904 | { |
| 1905 | this->loclists.s.section = sectp; |
| 1906 | this->loclists.size = bfd_section_size (sectp); |
| 1907 | } |
| 1908 | else if (section_is_p (sectp->name, &names.macinfo)) |
| 1909 | { |
| 1910 | this->macinfo.s.section = sectp; |
| 1911 | this->macinfo.size = bfd_section_size (sectp); |
| 1912 | } |
| 1913 | else if (section_is_p (sectp->name, &names.macro)) |
| 1914 | { |
| 1915 | this->macro.s.section = sectp; |
| 1916 | this->macro.size = bfd_section_size (sectp); |
| 1917 | } |
| 1918 | else if (section_is_p (sectp->name, &names.str)) |
| 1919 | { |
| 1920 | this->str.s.section = sectp; |
| 1921 | this->str.size = bfd_section_size (sectp); |
| 1922 | } |
| 1923 | else if (section_is_p (sectp->name, &names.str_offsets)) |
| 1924 | { |
| 1925 | this->str_offsets.s.section = sectp; |
| 1926 | this->str_offsets.size = bfd_section_size (sectp); |
| 1927 | } |
| 1928 | else if (section_is_p (sectp->name, &names.line_str)) |
| 1929 | { |
| 1930 | this->line_str.s.section = sectp; |
| 1931 | this->line_str.size = bfd_section_size (sectp); |
| 1932 | } |
| 1933 | else if (section_is_p (sectp->name, &names.addr)) |
| 1934 | { |
| 1935 | this->addr.s.section = sectp; |
| 1936 | this->addr.size = bfd_section_size (sectp); |
| 1937 | } |
| 1938 | else if (section_is_p (sectp->name, &names.frame)) |
| 1939 | { |
| 1940 | this->frame.s.section = sectp; |
| 1941 | this->frame.size = bfd_section_size (sectp); |
| 1942 | } |
| 1943 | else if (section_is_p (sectp->name, &names.eh_frame)) |
| 1944 | { |
| 1945 | this->eh_frame.s.section = sectp; |
| 1946 | this->eh_frame.size = bfd_section_size (sectp); |
| 1947 | } |
| 1948 | else if (section_is_p (sectp->name, &names.ranges)) |
| 1949 | { |
| 1950 | this->ranges.s.section = sectp; |
| 1951 | this->ranges.size = bfd_section_size (sectp); |
| 1952 | } |
| 1953 | else if (section_is_p (sectp->name, &names.rnglists)) |
| 1954 | { |
| 1955 | this->rnglists.s.section = sectp; |
| 1956 | this->rnglists.size = bfd_section_size (sectp); |
| 1957 | } |
| 1958 | else if (section_is_p (sectp->name, &names.types)) |
| 1959 | { |
| 1960 | struct dwarf2_section_info type_section; |
| 1961 | |
| 1962 | memset (&type_section, 0, sizeof (type_section)); |
| 1963 | type_section.s.section = sectp; |
| 1964 | type_section.size = bfd_section_size (sectp); |
| 1965 | |
| 1966 | this->types.push_back (type_section); |
| 1967 | } |
| 1968 | else if (section_is_p (sectp->name, &names.gdb_index)) |
| 1969 | { |
| 1970 | this->gdb_index.s.section = sectp; |
| 1971 | this->gdb_index.size = bfd_section_size (sectp); |
| 1972 | } |
| 1973 | else if (section_is_p (sectp->name, &names.debug_names)) |
| 1974 | { |
| 1975 | this->debug_names.s.section = sectp; |
| 1976 | this->debug_names.size = bfd_section_size (sectp); |
| 1977 | } |
| 1978 | else if (section_is_p (sectp->name, &names.debug_aranges)) |
| 1979 | { |
| 1980 | this->debug_aranges.s.section = sectp; |
| 1981 | this->debug_aranges.size = bfd_section_size (sectp); |
| 1982 | } |
| 1983 | |
| 1984 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
| 1985 | && bfd_section_vma (sectp) == 0) |
| 1986 | this->has_section_at_zero = true; |
| 1987 | } |
| 1988 | |
| 1989 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
| 1990 | SECTION_NAME. */ |
| 1991 | |
| 1992 | void |
| 1993 | dwarf2_get_section_info (struct objfile *objfile, |
| 1994 | enum dwarf2_section_enum sect, |
| 1995 | asection **sectp, const gdb_byte **bufp, |
| 1996 | bfd_size_type *sizep) |
| 1997 | { |
| 1998 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
| 1999 | struct dwarf2_section_info *info; |
| 2000 | |
| 2001 | /* We may see an objfile without any DWARF, in which case we just |
| 2002 | return nothing. */ |
| 2003 | if (data == NULL) |
| 2004 | { |
| 2005 | *sectp = NULL; |
| 2006 | *bufp = NULL; |
| 2007 | *sizep = 0; |
| 2008 | return; |
| 2009 | } |
| 2010 | switch (sect) |
| 2011 | { |
| 2012 | case DWARF2_DEBUG_FRAME: |
| 2013 | info = &data->frame; |
| 2014 | break; |
| 2015 | case DWARF2_EH_FRAME: |
| 2016 | info = &data->eh_frame; |
| 2017 | break; |
| 2018 | default: |
| 2019 | gdb_assert_not_reached ("unexpected section"); |
| 2020 | } |
| 2021 | |
| 2022 | info->read (objfile); |
| 2023 | |
| 2024 | *sectp = info->get_bfd_section (); |
| 2025 | *bufp = info->buffer; |
| 2026 | *sizep = info->size; |
| 2027 | } |
| 2028 | |
| 2029 | /* A helper function to find the sections for a .dwz file. */ |
| 2030 | |
| 2031 | static void |
| 2032 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) |
| 2033 | { |
| 2034 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
| 2035 | |
| 2036 | /* Note that we only support the standard ELF names, because .dwz |
| 2037 | is ELF-only (at the time of writing). */ |
| 2038 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) |
| 2039 | { |
| 2040 | dwz_file->abbrev.s.section = sectp; |
| 2041 | dwz_file->abbrev.size = bfd_section_size (sectp); |
| 2042 | } |
| 2043 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) |
| 2044 | { |
| 2045 | dwz_file->info.s.section = sectp; |
| 2046 | dwz_file->info.size = bfd_section_size (sectp); |
| 2047 | } |
| 2048 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) |
| 2049 | { |
| 2050 | dwz_file->str.s.section = sectp; |
| 2051 | dwz_file->str.size = bfd_section_size (sectp); |
| 2052 | } |
| 2053 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) |
| 2054 | { |
| 2055 | dwz_file->line.s.section = sectp; |
| 2056 | dwz_file->line.size = bfd_section_size (sectp); |
| 2057 | } |
| 2058 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) |
| 2059 | { |
| 2060 | dwz_file->macro.s.section = sectp; |
| 2061 | dwz_file->macro.size = bfd_section_size (sectp); |
| 2062 | } |
| 2063 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
| 2064 | { |
| 2065 | dwz_file->gdb_index.s.section = sectp; |
| 2066 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
| 2067 | } |
| 2068 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
| 2069 | { |
| 2070 | dwz_file->debug_names.s.section = sectp; |
| 2071 | dwz_file->debug_names.size = bfd_section_size (sectp); |
| 2072 | } |
| 2073 | } |
| 2074 | |
| 2075 | /* See dwarf2read.h. */ |
| 2076 | |
| 2077 | struct dwz_file * |
| 2078 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 2079 | { |
| 2080 | const char *filename; |
| 2081 | bfd_size_type buildid_len_arg; |
| 2082 | size_t buildid_len; |
| 2083 | bfd_byte *buildid; |
| 2084 | |
| 2085 | if (dwarf2_per_objfile->dwz_file != NULL) |
| 2086 | return dwarf2_per_objfile->dwz_file.get (); |
| 2087 | |
| 2088 | bfd_set_error (bfd_error_no_error); |
| 2089 | gdb::unique_xmalloc_ptr<char> data |
| 2090 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, |
| 2091 | &buildid_len_arg, &buildid)); |
| 2092 | if (data == NULL) |
| 2093 | { |
| 2094 | if (bfd_get_error () == bfd_error_no_error) |
| 2095 | return NULL; |
| 2096 | error (_("could not read '.gnu_debugaltlink' section: %s"), |
| 2097 | bfd_errmsg (bfd_get_error ())); |
| 2098 | } |
| 2099 | |
| 2100 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); |
| 2101 | |
| 2102 | buildid_len = (size_t) buildid_len_arg; |
| 2103 | |
| 2104 | filename = data.get (); |
| 2105 | |
| 2106 | std::string abs_storage; |
| 2107 | if (!IS_ABSOLUTE_PATH (filename)) |
| 2108 | { |
| 2109 | gdb::unique_xmalloc_ptr<char> abs |
| 2110 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
| 2111 | |
| 2112 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
| 2113 | filename = abs_storage.c_str (); |
| 2114 | } |
| 2115 | |
| 2116 | /* First try the file name given in the section. If that doesn't |
| 2117 | work, try to use the build-id instead. */ |
| 2118 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget)); |
| 2119 | if (dwz_bfd != NULL) |
| 2120 | { |
| 2121 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
| 2122 | dwz_bfd.reset (nullptr); |
| 2123 | } |
| 2124 | |
| 2125 | if (dwz_bfd == NULL) |
| 2126 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); |
| 2127 | |
| 2128 | if (dwz_bfd == nullptr) |
| 2129 | { |
| 2130 | gdb::unique_xmalloc_ptr<char> alt_filename; |
| 2131 | const char *origname = dwarf2_per_objfile->objfile->original_name; |
| 2132 | |
| 2133 | scoped_fd fd (debuginfod_debuginfo_query (buildid, |
| 2134 | buildid_len, |
| 2135 | origname, |
| 2136 | &alt_filename)); |
| 2137 | |
| 2138 | if (fd.get () >= 0) |
| 2139 | { |
| 2140 | /* File successfully retrieved from server. */ |
| 2141 | dwz_bfd = gdb_bfd_open (alt_filename.get (), gnutarget); |
| 2142 | |
| 2143 | if (dwz_bfd == nullptr) |
| 2144 | warning (_("File \"%s\" from debuginfod cannot be opened as bfd"), |
| 2145 | alt_filename.get ()); |
| 2146 | else if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
| 2147 | dwz_bfd.reset (nullptr); |
| 2148 | } |
| 2149 | } |
| 2150 | |
| 2151 | if (dwz_bfd == NULL) |
| 2152 | error (_("could not find '.gnu_debugaltlink' file for %s"), |
| 2153 | objfile_name (dwarf2_per_objfile->objfile)); |
| 2154 | |
| 2155 | std::unique_ptr<struct dwz_file> result |
| 2156 | (new struct dwz_file (std::move (dwz_bfd))); |
| 2157 | |
| 2158 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
| 2159 | result.get ()); |
| 2160 | |
| 2161 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
| 2162 | result->dwz_bfd.get ()); |
| 2163 | dwarf2_per_objfile->dwz_file = std::move (result); |
| 2164 | return dwarf2_per_objfile->dwz_file.get (); |
| 2165 | } |
| 2166 | \f |
| 2167 | /* DWARF quick_symbols_functions support. */ |
| 2168 | |
| 2169 | /* TUs can share .debug_line entries, and there can be a lot more TUs than |
| 2170 | unique line tables, so we maintain a separate table of all .debug_line |
| 2171 | derived entries to support the sharing. |
| 2172 | All the quick functions need is the list of file names. We discard the |
| 2173 | line_header when we're done and don't need to record it here. */ |
| 2174 | struct quick_file_names |
| 2175 | { |
| 2176 | /* The data used to construct the hash key. */ |
| 2177 | struct stmt_list_hash hash; |
| 2178 | |
| 2179 | /* The number of entries in file_names, real_names. */ |
| 2180 | unsigned int num_file_names; |
| 2181 | |
| 2182 | /* The file names from the line table, after being run through |
| 2183 | file_full_name. */ |
| 2184 | const char **file_names; |
| 2185 | |
| 2186 | /* The file names from the line table after being run through |
| 2187 | gdb_realpath. These are computed lazily. */ |
| 2188 | const char **real_names; |
| 2189 | }; |
| 2190 | |
| 2191 | /* When using the index (and thus not using psymtabs), each CU has an |
| 2192 | object of this type. This is used to hold information needed by |
| 2193 | the various "quick" methods. */ |
| 2194 | struct dwarf2_per_cu_quick_data |
| 2195 | { |
| 2196 | /* The file table. This can be NULL if there was no file table |
| 2197 | or it's currently not read in. |
| 2198 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ |
| 2199 | struct quick_file_names *file_names; |
| 2200 | |
| 2201 | /* The corresponding symbol table. This is NULL if symbols for this |
| 2202 | CU have not yet been read. */ |
| 2203 | struct compunit_symtab *compunit_symtab; |
| 2204 | |
| 2205 | /* A temporary mark bit used when iterating over all CUs in |
| 2206 | expand_symtabs_matching. */ |
| 2207 | unsigned int mark : 1; |
| 2208 | |
| 2209 | /* True if we've tried to read the file table and found there isn't one. |
| 2210 | There will be no point in trying to read it again next time. */ |
| 2211 | unsigned int no_file_data : 1; |
| 2212 | }; |
| 2213 | |
| 2214 | /* Utility hash function for a stmt_list_hash. */ |
| 2215 | |
| 2216 | static hashval_t |
| 2217 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) |
| 2218 | { |
| 2219 | hashval_t v = 0; |
| 2220 | |
| 2221 | if (stmt_list_hash->dwo_unit != NULL) |
| 2222 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; |
| 2223 | v += to_underlying (stmt_list_hash->line_sect_off); |
| 2224 | return v; |
| 2225 | } |
| 2226 | |
| 2227 | /* Utility equality function for a stmt_list_hash. */ |
| 2228 | |
| 2229 | static int |
| 2230 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, |
| 2231 | const struct stmt_list_hash *rhs) |
| 2232 | { |
| 2233 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) |
| 2234 | return 0; |
| 2235 | if (lhs->dwo_unit != NULL |
| 2236 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) |
| 2237 | return 0; |
| 2238 | |
| 2239 | return lhs->line_sect_off == rhs->line_sect_off; |
| 2240 | } |
| 2241 | |
| 2242 | /* Hash function for a quick_file_names. */ |
| 2243 | |
| 2244 | static hashval_t |
| 2245 | hash_file_name_entry (const void *e) |
| 2246 | { |
| 2247 | const struct quick_file_names *file_data |
| 2248 | = (const struct quick_file_names *) e; |
| 2249 | |
| 2250 | return hash_stmt_list_entry (&file_data->hash); |
| 2251 | } |
| 2252 | |
| 2253 | /* Equality function for a quick_file_names. */ |
| 2254 | |
| 2255 | static int |
| 2256 | eq_file_name_entry (const void *a, const void *b) |
| 2257 | { |
| 2258 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
| 2259 | const struct quick_file_names *eb = (const struct quick_file_names *) b; |
| 2260 | |
| 2261 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
| 2262 | } |
| 2263 | |
| 2264 | /* Delete function for a quick_file_names. */ |
| 2265 | |
| 2266 | static void |
| 2267 | delete_file_name_entry (void *e) |
| 2268 | { |
| 2269 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
| 2270 | int i; |
| 2271 | |
| 2272 | for (i = 0; i < file_data->num_file_names; ++i) |
| 2273 | { |
| 2274 | xfree ((void*) file_data->file_names[i]); |
| 2275 | if (file_data->real_names) |
| 2276 | xfree ((void*) file_data->real_names[i]); |
| 2277 | } |
| 2278 | |
| 2279 | /* The space for the struct itself lives on objfile_obstack, |
| 2280 | so we don't free it here. */ |
| 2281 | } |
| 2282 | |
| 2283 | /* Create a quick_file_names hash table. */ |
| 2284 | |
| 2285 | static htab_up |
| 2286 | create_quick_file_names_table (unsigned int nr_initial_entries) |
| 2287 | { |
| 2288 | return htab_up (htab_create_alloc (nr_initial_entries, |
| 2289 | hash_file_name_entry, eq_file_name_entry, |
| 2290 | delete_file_name_entry, xcalloc, xfree)); |
| 2291 | } |
| 2292 | |
| 2293 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
| 2294 | have to be created afterwards. You should call age_cached_comp_units after |
| 2295 | processing PER_CU->CU. dw2_setup must have been already called. */ |
| 2296 | |
| 2297 | static void |
| 2298 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
| 2299 | { |
| 2300 | if (per_cu->is_debug_types) |
| 2301 | load_full_type_unit (per_cu); |
| 2302 | else |
| 2303 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
| 2304 | |
| 2305 | if (per_cu->cu == NULL) |
| 2306 | return; /* Dummy CU. */ |
| 2307 | |
| 2308 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); |
| 2309 | } |
| 2310 | |
| 2311 | /* Read in the symbols for PER_CU. */ |
| 2312 | |
| 2313 | static void |
| 2314 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
| 2315 | { |
| 2316 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 2317 | |
| 2318 | /* Skip type_unit_groups, reading the type units they contain |
| 2319 | is handled elsewhere. */ |
| 2320 | if (per_cu->type_unit_group_p ()) |
| 2321 | return; |
| 2322 | |
| 2323 | /* The destructor of dwarf2_queue_guard frees any entries left on |
| 2324 | the queue. After this point we're guaranteed to leave this function |
| 2325 | with the dwarf queue empty. */ |
| 2326 | dwarf2_queue_guard q_guard (dwarf2_per_objfile); |
| 2327 | |
| 2328 | if (dwarf2_per_objfile->using_index |
| 2329 | ? per_cu->v.quick->compunit_symtab == NULL |
| 2330 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
| 2331 | { |
| 2332 | queue_comp_unit (per_cu, language_minimal); |
| 2333 | load_cu (per_cu, skip_partial); |
| 2334 | |
| 2335 | /* If we just loaded a CU from a DWO, and we're working with an index |
| 2336 | that may badly handle TUs, load all the TUs in that DWO as well. |
| 2337 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ |
| 2338 | if (!per_cu->is_debug_types |
| 2339 | && per_cu->cu != NULL |
| 2340 | && per_cu->cu->dwo_unit != NULL |
| 2341 | && dwarf2_per_objfile->index_table != NULL |
| 2342 | && dwarf2_per_objfile->index_table->version <= 7 |
| 2343 | /* DWP files aren't supported yet. */ |
| 2344 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
| 2345 | queue_and_load_all_dwo_tus (per_cu); |
| 2346 | } |
| 2347 | |
| 2348 | process_queue (dwarf2_per_objfile); |
| 2349 | |
| 2350 | /* Age the cache, releasing compilation units that have not |
| 2351 | been used recently. */ |
| 2352 | age_cached_comp_units (dwarf2_per_objfile); |
| 2353 | } |
| 2354 | |
| 2355 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is |
| 2356 | the objfile from which this CU came. Returns the resulting symbol |
| 2357 | table. */ |
| 2358 | |
| 2359 | static struct compunit_symtab * |
| 2360 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
| 2361 | { |
| 2362 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 2363 | |
| 2364 | gdb_assert (dwarf2_per_objfile->using_index); |
| 2365 | if (!per_cu->v.quick->compunit_symtab) |
| 2366 | { |
| 2367 | free_cached_comp_units freer (dwarf2_per_objfile); |
| 2368 | scoped_restore decrementer = increment_reading_symtab (); |
| 2369 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
| 2370 | process_cu_includes (dwarf2_per_objfile); |
| 2371 | } |
| 2372 | |
| 2373 | return per_cu->v.quick->compunit_symtab; |
| 2374 | } |
| 2375 | |
| 2376 | /* See declaration. */ |
| 2377 | |
| 2378 | dwarf2_per_cu_data * |
| 2379 | dwarf2_per_objfile::get_cutu (int index) |
| 2380 | { |
| 2381 | if (index >= this->all_comp_units.size ()) |
| 2382 | { |
| 2383 | index -= this->all_comp_units.size (); |
| 2384 | gdb_assert (index < this->all_type_units.size ()); |
| 2385 | return &this->all_type_units[index]->per_cu; |
| 2386 | } |
| 2387 | |
| 2388 | return this->all_comp_units[index]; |
| 2389 | } |
| 2390 | |
| 2391 | /* See declaration. */ |
| 2392 | |
| 2393 | dwarf2_per_cu_data * |
| 2394 | dwarf2_per_objfile::get_cu (int index) |
| 2395 | { |
| 2396 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
| 2397 | |
| 2398 | return this->all_comp_units[index]; |
| 2399 | } |
| 2400 | |
| 2401 | /* See declaration. */ |
| 2402 | |
| 2403 | signatured_type * |
| 2404 | dwarf2_per_objfile::get_tu (int index) |
| 2405 | { |
| 2406 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
| 2407 | |
| 2408 | return this->all_type_units[index]; |
| 2409 | } |
| 2410 | |
| 2411 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
| 2412 | objfile_obstack, and constructed with the specified field |
| 2413 | values. */ |
| 2414 | |
| 2415 | static dwarf2_per_cu_data * |
| 2416 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2417 | struct dwarf2_section_info *section, |
| 2418 | int is_dwz, |
| 2419 | sect_offset sect_off, ULONGEST length) |
| 2420 | { |
| 2421 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 2422 | dwarf2_per_cu_data *the_cu |
| 2423 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2424 | struct dwarf2_per_cu_data); |
| 2425 | the_cu->sect_off = sect_off; |
| 2426 | the_cu->length = length; |
| 2427 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 2428 | the_cu->section = section; |
| 2429 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2430 | struct dwarf2_per_cu_quick_data); |
| 2431 | the_cu->is_dwz = is_dwz; |
| 2432 | return the_cu; |
| 2433 | } |
| 2434 | |
| 2435 | /* A helper for create_cus_from_index that handles a given list of |
| 2436 | CUs. */ |
| 2437 | |
| 2438 | static void |
| 2439 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2440 | const gdb_byte *cu_list, offset_type n_elements, |
| 2441 | struct dwarf2_section_info *section, |
| 2442 | int is_dwz) |
| 2443 | { |
| 2444 | for (offset_type i = 0; i < n_elements; i += 2) |
| 2445 | { |
| 2446 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
| 2447 | |
| 2448 | sect_offset sect_off |
| 2449 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); |
| 2450 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); |
| 2451 | cu_list += 2 * 8; |
| 2452 | |
| 2453 | dwarf2_per_cu_data *per_cu |
| 2454 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
| 2455 | sect_off, length); |
| 2456 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
| 2457 | } |
| 2458 | } |
| 2459 | |
| 2460 | /* Read the CU list from the mapped index, and use it to create all |
| 2461 | the CU objects for this objfile. */ |
| 2462 | |
| 2463 | static void |
| 2464 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2465 | const gdb_byte *cu_list, offset_type cu_list_elements, |
| 2466 | const gdb_byte *dwz_list, offset_type dwz_elements) |
| 2467 | { |
| 2468 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
| 2469 | dwarf2_per_objfile->all_comp_units.reserve |
| 2470 | ((cu_list_elements + dwz_elements) / 2); |
| 2471 | |
| 2472 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
| 2473 | &dwarf2_per_objfile->info, 0); |
| 2474 | |
| 2475 | if (dwz_elements == 0) |
| 2476 | return; |
| 2477 | |
| 2478 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 2479 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, |
| 2480 | &dwz->info, 1); |
| 2481 | } |
| 2482 | |
| 2483 | /* Create the signatured type hash table from the index. */ |
| 2484 | |
| 2485 | static void |
| 2486 | create_signatured_type_table_from_index |
| 2487 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2488 | struct dwarf2_section_info *section, |
| 2489 | const gdb_byte *bytes, |
| 2490 | offset_type elements) |
| 2491 | { |
| 2492 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 2493 | |
| 2494 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
| 2495 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); |
| 2496 | |
| 2497 | htab_up sig_types_hash = allocate_signatured_type_table (); |
| 2498 | |
| 2499 | for (offset_type i = 0; i < elements; i += 3) |
| 2500 | { |
| 2501 | struct signatured_type *sig_type; |
| 2502 | ULONGEST signature; |
| 2503 | void **slot; |
| 2504 | cu_offset type_offset_in_tu; |
| 2505 | |
| 2506 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
| 2507 | sect_offset sect_off |
| 2508 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); |
| 2509 | type_offset_in_tu |
| 2510 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, |
| 2511 | BFD_ENDIAN_LITTLE); |
| 2512 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
| 2513 | bytes += 3 * 8; |
| 2514 | |
| 2515 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2516 | struct signatured_type); |
| 2517 | sig_type->signature = signature; |
| 2518 | sig_type->type_offset_in_tu = type_offset_in_tu; |
| 2519 | sig_type->per_cu.is_debug_types = 1; |
| 2520 | sig_type->per_cu.section = section; |
| 2521 | sig_type->per_cu.sect_off = sect_off; |
| 2522 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 2523 | sig_type->per_cu.v.quick |
| 2524 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2525 | struct dwarf2_per_cu_quick_data); |
| 2526 | |
| 2527 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
| 2528 | *slot = sig_type; |
| 2529 | |
| 2530 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
| 2531 | } |
| 2532 | |
| 2533 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
| 2534 | } |
| 2535 | |
| 2536 | /* Create the signatured type hash table from .debug_names. */ |
| 2537 | |
| 2538 | static void |
| 2539 | create_signatured_type_table_from_debug_names |
| 2540 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2541 | const mapped_debug_names &map, |
| 2542 | struct dwarf2_section_info *section, |
| 2543 | struct dwarf2_section_info *abbrev_section) |
| 2544 | { |
| 2545 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 2546 | |
| 2547 | section->read (objfile); |
| 2548 | abbrev_section->read (objfile); |
| 2549 | |
| 2550 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
| 2551 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); |
| 2552 | |
| 2553 | htab_up sig_types_hash = allocate_signatured_type_table (); |
| 2554 | |
| 2555 | for (uint32_t i = 0; i < map.tu_count; ++i) |
| 2556 | { |
| 2557 | struct signatured_type *sig_type; |
| 2558 | void **slot; |
| 2559 | |
| 2560 | sect_offset sect_off |
| 2561 | = (sect_offset) (extract_unsigned_integer |
| 2562 | (map.tu_table_reordered + i * map.offset_size, |
| 2563 | map.offset_size, |
| 2564 | map.dwarf5_byte_order)); |
| 2565 | |
| 2566 | comp_unit_head cu_header; |
| 2567 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
| 2568 | abbrev_section, |
| 2569 | section->buffer + to_underlying (sect_off), |
| 2570 | rcuh_kind::TYPE); |
| 2571 | |
| 2572 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2573 | struct signatured_type); |
| 2574 | sig_type->signature = cu_header.signature; |
| 2575 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; |
| 2576 | sig_type->per_cu.is_debug_types = 1; |
| 2577 | sig_type->per_cu.section = section; |
| 2578 | sig_type->per_cu.sect_off = sect_off; |
| 2579 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 2580 | sig_type->per_cu.v.quick |
| 2581 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 2582 | struct dwarf2_per_cu_quick_data); |
| 2583 | |
| 2584 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
| 2585 | *slot = sig_type; |
| 2586 | |
| 2587 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
| 2588 | } |
| 2589 | |
| 2590 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
| 2591 | } |
| 2592 | |
| 2593 | /* Read the address map data from the mapped index, and use it to |
| 2594 | populate the objfile's psymtabs_addrmap. */ |
| 2595 | |
| 2596 | static void |
| 2597 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2598 | struct mapped_index *index) |
| 2599 | { |
| 2600 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 2601 | struct gdbarch *gdbarch = objfile->arch (); |
| 2602 | const gdb_byte *iter, *end; |
| 2603 | struct addrmap *mutable_map; |
| 2604 | CORE_ADDR baseaddr; |
| 2605 | |
| 2606 | auto_obstack temp_obstack; |
| 2607 | |
| 2608 | mutable_map = addrmap_create_mutable (&temp_obstack); |
| 2609 | |
| 2610 | iter = index->address_table.data (); |
| 2611 | end = iter + index->address_table.size (); |
| 2612 | |
| 2613 | baseaddr = objfile->text_section_offset (); |
| 2614 | |
| 2615 | while (iter < end) |
| 2616 | { |
| 2617 | ULONGEST hi, lo, cu_index; |
| 2618 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); |
| 2619 | iter += 8; |
| 2620 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); |
| 2621 | iter += 8; |
| 2622 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); |
| 2623 | iter += 4; |
| 2624 | |
| 2625 | if (lo > hi) |
| 2626 | { |
| 2627 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
| 2628 | hex_string (lo), hex_string (hi)); |
| 2629 | continue; |
| 2630 | } |
| 2631 | |
| 2632 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
| 2633 | { |
| 2634 | complaint (_(".gdb_index address table has invalid CU number %u"), |
| 2635 | (unsigned) cu_index); |
| 2636 | continue; |
| 2637 | } |
| 2638 | |
| 2639 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
| 2640 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; |
| 2641 | addrmap_set_empty (mutable_map, lo, hi - 1, |
| 2642 | dwarf2_per_objfile->get_cu (cu_index)); |
| 2643 | } |
| 2644 | |
| 2645 | objfile->partial_symtabs->psymtabs_addrmap |
| 2646 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
| 2647 | } |
| 2648 | |
| 2649 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
| 2650 | populate the objfile's psymtabs_addrmap. */ |
| 2651 | |
| 2652 | static void |
| 2653 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2654 | struct dwarf2_section_info *section) |
| 2655 | { |
| 2656 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 2657 | bfd *abfd = objfile->obfd; |
| 2658 | struct gdbarch *gdbarch = objfile->arch (); |
| 2659 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
| 2660 | |
| 2661 | auto_obstack temp_obstack; |
| 2662 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); |
| 2663 | |
| 2664 | std::unordered_map<sect_offset, |
| 2665 | dwarf2_per_cu_data *, |
| 2666 | gdb::hash_enum<sect_offset>> |
| 2667 | debug_info_offset_to_per_cu; |
| 2668 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 2669 | { |
| 2670 | const auto insertpair |
| 2671 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); |
| 2672 | if (!insertpair.second) |
| 2673 | { |
| 2674 | warning (_("Section .debug_aranges in %s has duplicate " |
| 2675 | "debug_info_offset %s, ignoring .debug_aranges."), |
| 2676 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); |
| 2677 | return; |
| 2678 | } |
| 2679 | } |
| 2680 | |
| 2681 | section->read (objfile); |
| 2682 | |
| 2683 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); |
| 2684 | |
| 2685 | const gdb_byte *addr = section->buffer; |
| 2686 | |
| 2687 | while (addr < section->buffer + section->size) |
| 2688 | { |
| 2689 | const gdb_byte *const entry_addr = addr; |
| 2690 | unsigned int bytes_read; |
| 2691 | |
| 2692 | const LONGEST entry_length = read_initial_length (abfd, addr, |
| 2693 | &bytes_read); |
| 2694 | addr += bytes_read; |
| 2695 | |
| 2696 | const gdb_byte *const entry_end = addr + entry_length; |
| 2697 | const bool dwarf5_is_dwarf64 = bytes_read != 4; |
| 2698 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; |
| 2699 | if (addr + entry_length > section->buffer + section->size) |
| 2700 | { |
| 2701 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2702 | "length %s exceeds section length %s, " |
| 2703 | "ignoring .debug_aranges."), |
| 2704 | objfile_name (objfile), |
| 2705 | plongest (entry_addr - section->buffer), |
| 2706 | plongest (bytes_read + entry_length), |
| 2707 | pulongest (section->size)); |
| 2708 | return; |
| 2709 | } |
| 2710 | |
| 2711 | /* The version number. */ |
| 2712 | const uint16_t version = read_2_bytes (abfd, addr); |
| 2713 | addr += 2; |
| 2714 | if (version != 2) |
| 2715 | { |
| 2716 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2717 | "has unsupported version %d, ignoring .debug_aranges."), |
| 2718 | objfile_name (objfile), |
| 2719 | plongest (entry_addr - section->buffer), version); |
| 2720 | return; |
| 2721 | } |
| 2722 | |
| 2723 | const uint64_t debug_info_offset |
| 2724 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); |
| 2725 | addr += offset_size; |
| 2726 | const auto per_cu_it |
| 2727 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); |
| 2728 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) |
| 2729 | { |
| 2730 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2731 | "debug_info_offset %s does not exists, " |
| 2732 | "ignoring .debug_aranges."), |
| 2733 | objfile_name (objfile), |
| 2734 | plongest (entry_addr - section->buffer), |
| 2735 | pulongest (debug_info_offset)); |
| 2736 | return; |
| 2737 | } |
| 2738 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; |
| 2739 | |
| 2740 | const uint8_t address_size = *addr++; |
| 2741 | if (address_size < 1 || address_size > 8) |
| 2742 | { |
| 2743 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2744 | "address_size %u is invalid, ignoring .debug_aranges."), |
| 2745 | objfile_name (objfile), |
| 2746 | plongest (entry_addr - section->buffer), address_size); |
| 2747 | return; |
| 2748 | } |
| 2749 | |
| 2750 | const uint8_t segment_selector_size = *addr++; |
| 2751 | if (segment_selector_size != 0) |
| 2752 | { |
| 2753 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2754 | "segment_selector_size %u is not supported, " |
| 2755 | "ignoring .debug_aranges."), |
| 2756 | objfile_name (objfile), |
| 2757 | plongest (entry_addr - section->buffer), |
| 2758 | segment_selector_size); |
| 2759 | return; |
| 2760 | } |
| 2761 | |
| 2762 | /* Must pad to an alignment boundary that is twice the address |
| 2763 | size. It is undocumented by the DWARF standard but GCC does |
| 2764 | use it. */ |
| 2765 | for (size_t padding = ((-(addr - section->buffer)) |
| 2766 | & (2 * address_size - 1)); |
| 2767 | padding > 0; padding--) |
| 2768 | if (*addr++ != 0) |
| 2769 | { |
| 2770 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2771 | "padding is not zero, ignoring .debug_aranges."), |
| 2772 | objfile_name (objfile), |
| 2773 | plongest (entry_addr - section->buffer)); |
| 2774 | return; |
| 2775 | } |
| 2776 | |
| 2777 | for (;;) |
| 2778 | { |
| 2779 | if (addr + 2 * address_size > entry_end) |
| 2780 | { |
| 2781 | warning (_("Section .debug_aranges in %s entry at offset %s " |
| 2782 | "address list is not properly terminated, " |
| 2783 | "ignoring .debug_aranges."), |
| 2784 | objfile_name (objfile), |
| 2785 | plongest (entry_addr - section->buffer)); |
| 2786 | return; |
| 2787 | } |
| 2788 | ULONGEST start = extract_unsigned_integer (addr, address_size, |
| 2789 | dwarf5_byte_order); |
| 2790 | addr += address_size; |
| 2791 | ULONGEST length = extract_unsigned_integer (addr, address_size, |
| 2792 | dwarf5_byte_order); |
| 2793 | addr += address_size; |
| 2794 | if (start == 0 && length == 0) |
| 2795 | break; |
| 2796 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 2797 | { |
| 2798 | /* Symbol was eliminated due to a COMDAT group. */ |
| 2799 | continue; |
| 2800 | } |
| 2801 | ULONGEST end = start + length; |
| 2802 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
| 2803 | - baseaddr); |
| 2804 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) |
| 2805 | - baseaddr); |
| 2806 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
| 2807 | } |
| 2808 | } |
| 2809 | |
| 2810 | objfile->partial_symtabs->psymtabs_addrmap |
| 2811 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
| 2812 | } |
| 2813 | |
| 2814 | /* Find a slot in the mapped index INDEX for the object named NAME. |
| 2815 | If NAME is found, set *VEC_OUT to point to the CU vector in the |
| 2816 | constant pool and return true. If NAME cannot be found, return |
| 2817 | false. */ |
| 2818 | |
| 2819 | static bool |
| 2820 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
| 2821 | offset_type **vec_out) |
| 2822 | { |
| 2823 | offset_type hash; |
| 2824 | offset_type slot, step; |
| 2825 | int (*cmp) (const char *, const char *); |
| 2826 | |
| 2827 | gdb::unique_xmalloc_ptr<char> without_params; |
| 2828 | if (current_language->la_language == language_cplus |
| 2829 | || current_language->la_language == language_fortran |
| 2830 | || current_language->la_language == language_d) |
| 2831 | { |
| 2832 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does |
| 2833 | not contain any. */ |
| 2834 | |
| 2835 | if (strchr (name, '(') != NULL) |
| 2836 | { |
| 2837 | without_params = cp_remove_params (name); |
| 2838 | |
| 2839 | if (without_params != NULL) |
| 2840 | name = without_params.get (); |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | /* Index version 4 did not support case insensitive searches. But the |
| 2845 | indices for case insensitive languages are built in lowercase, therefore |
| 2846 | simulate our NAME being searched is also lowercased. */ |
| 2847 | hash = mapped_index_string_hash ((index->version == 4 |
| 2848 | && case_sensitivity == case_sensitive_off |
| 2849 | ? 5 : index->version), |
| 2850 | name); |
| 2851 | |
| 2852 | slot = hash & (index->symbol_table.size () - 1); |
| 2853 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; |
| 2854 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
| 2855 | |
| 2856 | for (;;) |
| 2857 | { |
| 2858 | const char *str; |
| 2859 | |
| 2860 | const auto &bucket = index->symbol_table[slot]; |
| 2861 | if (bucket.name == 0 && bucket.vec == 0) |
| 2862 | return false; |
| 2863 | |
| 2864 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
| 2865 | if (!cmp (name, str)) |
| 2866 | { |
| 2867 | *vec_out = (offset_type *) (index->constant_pool |
| 2868 | + MAYBE_SWAP (bucket.vec)); |
| 2869 | return true; |
| 2870 | } |
| 2871 | |
| 2872 | slot = (slot + step) & (index->symbol_table.size () - 1); |
| 2873 | } |
| 2874 | } |
| 2875 | |
| 2876 | /* A helper function that reads the .gdb_index from BUFFER and fills |
| 2877 | in MAP. FILENAME is the name of the file containing the data; |
| 2878 | it is used for error reporting. DEPRECATED_OK is true if it is |
| 2879 | ok to use deprecated sections. |
| 2880 | |
| 2881 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are |
| 2882 | out parameters that are filled in with information about the CU and |
| 2883 | TU lists in the section. |
| 2884 | |
| 2885 | Returns true if all went well, false otherwise. */ |
| 2886 | |
| 2887 | static bool |
| 2888 | read_gdb_index_from_buffer (const char *filename, |
| 2889 | bool deprecated_ok, |
| 2890 | gdb::array_view<const gdb_byte> buffer, |
| 2891 | struct mapped_index *map, |
| 2892 | const gdb_byte **cu_list, |
| 2893 | offset_type *cu_list_elements, |
| 2894 | const gdb_byte **types_list, |
| 2895 | offset_type *types_list_elements) |
| 2896 | { |
| 2897 | const gdb_byte *addr = &buffer[0]; |
| 2898 | |
| 2899 | /* Version check. */ |
| 2900 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
| 2901 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
| 2902 | causes the index to behave very poorly for certain requests. Version 3 |
| 2903 | contained incomplete addrmap. So, it seems better to just ignore such |
| 2904 | indices. */ |
| 2905 | if (version < 4) |
| 2906 | { |
| 2907 | static int warning_printed = 0; |
| 2908 | if (!warning_printed) |
| 2909 | { |
| 2910 | warning (_("Skipping obsolete .gdb_index section in %s."), |
| 2911 | filename); |
| 2912 | warning_printed = 1; |
| 2913 | } |
| 2914 | return 0; |
| 2915 | } |
| 2916 | /* Index version 4 uses a different hash function than index version |
| 2917 | 5 and later. |
| 2918 | |
| 2919 | Versions earlier than 6 did not emit psymbols for inlined |
| 2920 | functions. Using these files will cause GDB not to be able to |
| 2921 | set breakpoints on inlined functions by name, so we ignore these |
| 2922 | indices unless the user has done |
| 2923 | "set use-deprecated-index-sections on". */ |
| 2924 | if (version < 6 && !deprecated_ok) |
| 2925 | { |
| 2926 | static int warning_printed = 0; |
| 2927 | if (!warning_printed) |
| 2928 | { |
| 2929 | warning (_("\ |
| 2930 | Skipping deprecated .gdb_index section in %s.\n\ |
| 2931 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ |
| 2932 | to use the section anyway."), |
| 2933 | filename); |
| 2934 | warning_printed = 1; |
| 2935 | } |
| 2936 | return 0; |
| 2937 | } |
| 2938 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
| 2939 | of the TU (for symbols coming from TUs), |
| 2940 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. |
| 2941 | Plus gold-generated indices can have duplicate entries for global symbols, |
| 2942 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. |
| 2943 | These are just performance bugs, and we can't distinguish gdb-generated |
| 2944 | indices from gold-generated ones, so issue no warning here. */ |
| 2945 | |
| 2946 | /* Indexes with higher version than the one supported by GDB may be no |
| 2947 | longer backward compatible. */ |
| 2948 | if (version > 8) |
| 2949 | return 0; |
| 2950 | |
| 2951 | map->version = version; |
| 2952 | |
| 2953 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
| 2954 | |
| 2955 | int i = 0; |
| 2956 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
| 2957 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) |
| 2958 | / 8); |
| 2959 | ++i; |
| 2960 | |
| 2961 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
| 2962 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) |
| 2963 | - MAYBE_SWAP (metadata[i])) |
| 2964 | / 8); |
| 2965 | ++i; |
| 2966 | |
| 2967 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
| 2968 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); |
| 2969 | map->address_table |
| 2970 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); |
| 2971 | ++i; |
| 2972 | |
| 2973 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
| 2974 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); |
| 2975 | map->symbol_table |
| 2976 | = gdb::array_view<mapped_index::symbol_table_slot> |
| 2977 | ((mapped_index::symbol_table_slot *) symbol_table, |
| 2978 | (mapped_index::symbol_table_slot *) symbol_table_end); |
| 2979 | |
| 2980 | ++i; |
| 2981 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
| 2982 | |
| 2983 | return 1; |
| 2984 | } |
| 2985 | |
| 2986 | /* Callback types for dwarf2_read_gdb_index. */ |
| 2987 | |
| 2988 | typedef gdb::function_view |
| 2989 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> |
| 2990 | get_gdb_index_contents_ftype; |
| 2991 | typedef gdb::function_view |
| 2992 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> |
| 2993 | get_gdb_index_contents_dwz_ftype; |
| 2994 | |
| 2995 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
| 2996 | elements of all the CUs and return 1. Otherwise, return 0. */ |
| 2997 | |
| 2998 | static int |
| 2999 | dwarf2_read_gdb_index |
| 3000 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3001 | get_gdb_index_contents_ftype get_gdb_index_contents, |
| 3002 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) |
| 3003 | { |
| 3004 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
| 3005 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; |
| 3006 | struct dwz_file *dwz; |
| 3007 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3008 | |
| 3009 | gdb::array_view<const gdb_byte> main_index_contents |
| 3010 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); |
| 3011 | |
| 3012 | if (main_index_contents.empty ()) |
| 3013 | return 0; |
| 3014 | |
| 3015 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
| 3016 | if (!read_gdb_index_from_buffer (objfile_name (objfile), |
| 3017 | use_deprecated_index_sections, |
| 3018 | main_index_contents, map.get (), &cu_list, |
| 3019 | &cu_list_elements, &types_list, |
| 3020 | &types_list_elements)) |
| 3021 | return 0; |
| 3022 | |
| 3023 | /* Don't use the index if it's empty. */ |
| 3024 | if (map->symbol_table.empty ()) |
| 3025 | return 0; |
| 3026 | |
| 3027 | /* If there is a .dwz file, read it so we can get its CU list as |
| 3028 | well. */ |
| 3029 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 3030 | if (dwz != NULL) |
| 3031 | { |
| 3032 | struct mapped_index dwz_map; |
| 3033 | const gdb_byte *dwz_types_ignore; |
| 3034 | offset_type dwz_types_elements_ignore; |
| 3035 | |
| 3036 | gdb::array_view<const gdb_byte> dwz_index_content |
| 3037 | = get_gdb_index_contents_dwz (objfile, dwz); |
| 3038 | |
| 3039 | if (dwz_index_content.empty ()) |
| 3040 | return 0; |
| 3041 | |
| 3042 | if (!read_gdb_index_from_buffer (bfd_get_filename (dwz->dwz_bfd.get ()), |
| 3043 | 1, dwz_index_content, &dwz_map, |
| 3044 | &dwz_list, &dwz_list_elements, |
| 3045 | &dwz_types_ignore, |
| 3046 | &dwz_types_elements_ignore)) |
| 3047 | { |
| 3048 | warning (_("could not read '.gdb_index' section from %s; skipping"), |
| 3049 | bfd_get_filename (dwz->dwz_bfd.get ())); |
| 3050 | return 0; |
| 3051 | } |
| 3052 | } |
| 3053 | |
| 3054 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
| 3055 | dwz_list, dwz_list_elements); |
| 3056 | |
| 3057 | if (types_list_elements) |
| 3058 | { |
| 3059 | /* We can only handle a single .debug_types when we have an |
| 3060 | index. */ |
| 3061 | if (dwarf2_per_objfile->types.size () != 1) |
| 3062 | return 0; |
| 3063 | |
| 3064 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
| 3065 | |
| 3066 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
| 3067 | types_list, types_list_elements); |
| 3068 | } |
| 3069 | |
| 3070 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
| 3071 | |
| 3072 | dwarf2_per_objfile->index_table = std::move (map); |
| 3073 | dwarf2_per_objfile->using_index = 1; |
| 3074 | dwarf2_per_objfile->quick_file_names_table = |
| 3075 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
| 3076 | |
| 3077 | return 1; |
| 3078 | } |
| 3079 | |
| 3080 | /* die_reader_func for dw2_get_file_names. */ |
| 3081 | |
| 3082 | static void |
| 3083 | dw2_get_file_names_reader (const struct die_reader_specs *reader, |
| 3084 | const gdb_byte *info_ptr, |
| 3085 | struct die_info *comp_unit_die) |
| 3086 | { |
| 3087 | struct dwarf2_cu *cu = reader->cu; |
| 3088 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
| 3089 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3090 | = cu->per_cu->dwarf2_per_objfile; |
| 3091 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3092 | struct dwarf2_per_cu_data *lh_cu; |
| 3093 | struct attribute *attr; |
| 3094 | void **slot; |
| 3095 | struct quick_file_names *qfn; |
| 3096 | |
| 3097 | gdb_assert (! this_cu->is_debug_types); |
| 3098 | |
| 3099 | /* Our callers never want to match partial units -- instead they |
| 3100 | will match the enclosing full CU. */ |
| 3101 | if (comp_unit_die->tag == DW_TAG_partial_unit) |
| 3102 | { |
| 3103 | this_cu->v.quick->no_file_data = 1; |
| 3104 | return; |
| 3105 | } |
| 3106 | |
| 3107 | lh_cu = this_cu; |
| 3108 | slot = NULL; |
| 3109 | |
| 3110 | line_header_up lh; |
| 3111 | sect_offset line_offset {}; |
| 3112 | |
| 3113 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
| 3114 | if (attr != nullptr) |
| 3115 | { |
| 3116 | struct quick_file_names find_entry; |
| 3117 | |
| 3118 | line_offset = (sect_offset) DW_UNSND (attr); |
| 3119 | |
| 3120 | /* We may have already read in this line header (TU line header sharing). |
| 3121 | If we have we're done. */ |
| 3122 | find_entry.hash.dwo_unit = cu->dwo_unit; |
| 3123 | find_entry.hash.line_sect_off = line_offset; |
| 3124 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table.get (), |
| 3125 | &find_entry, INSERT); |
| 3126 | if (*slot != NULL) |
| 3127 | { |
| 3128 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
| 3129 | return; |
| 3130 | } |
| 3131 | |
| 3132 | lh = dwarf_decode_line_header (line_offset, cu); |
| 3133 | } |
| 3134 | if (lh == NULL) |
| 3135 | { |
| 3136 | lh_cu->v.quick->no_file_data = 1; |
| 3137 | return; |
| 3138 | } |
| 3139 | |
| 3140 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
| 3141 | qfn->hash.dwo_unit = cu->dwo_unit; |
| 3142 | qfn->hash.line_sect_off = line_offset; |
| 3143 | gdb_assert (slot != NULL); |
| 3144 | *slot = qfn; |
| 3145 | |
| 3146 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
| 3147 | |
| 3148 | int offset = 0; |
| 3149 | if (strcmp (fnd.name, "<unknown>") != 0) |
| 3150 | ++offset; |
| 3151 | |
| 3152 | qfn->num_file_names = offset + lh->file_names_size (); |
| 3153 | qfn->file_names = |
| 3154 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
| 3155 | if (offset != 0) |
| 3156 | qfn->file_names[0] = xstrdup (fnd.name); |
| 3157 | for (int i = 0; i < lh->file_names_size (); ++i) |
| 3158 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
| 3159 | fnd.comp_dir).release (); |
| 3160 | qfn->real_names = NULL; |
| 3161 | |
| 3162 | lh_cu->v.quick->file_names = qfn; |
| 3163 | } |
| 3164 | |
| 3165 | /* A helper for the "quick" functions which attempts to read the line |
| 3166 | table for THIS_CU. */ |
| 3167 | |
| 3168 | static struct quick_file_names * |
| 3169 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
| 3170 | { |
| 3171 | /* This should never be called for TUs. */ |
| 3172 | gdb_assert (! this_cu->is_debug_types); |
| 3173 | /* Nor type unit groups. */ |
| 3174 | gdb_assert (! this_cu->type_unit_group_p ()); |
| 3175 | |
| 3176 | if (this_cu->v.quick->file_names != NULL) |
| 3177 | return this_cu->v.quick->file_names; |
| 3178 | /* If we know there is no line data, no point in looking again. */ |
| 3179 | if (this_cu->v.quick->no_file_data) |
| 3180 | return NULL; |
| 3181 | |
| 3182 | cutu_reader reader (this_cu); |
| 3183 | if (!reader.dummy_p) |
| 3184 | dw2_get_file_names_reader (&reader, reader.info_ptr, reader.comp_unit_die); |
| 3185 | |
| 3186 | if (this_cu->v.quick->no_file_data) |
| 3187 | return NULL; |
| 3188 | return this_cu->v.quick->file_names; |
| 3189 | } |
| 3190 | |
| 3191 | /* A helper for the "quick" functions which computes and caches the |
| 3192 | real path for a given file name from the line table. */ |
| 3193 | |
| 3194 | static const char * |
| 3195 | dw2_get_real_path (struct objfile *objfile, |
| 3196 | struct quick_file_names *qfn, int index) |
| 3197 | { |
| 3198 | if (qfn->real_names == NULL) |
| 3199 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, |
| 3200 | qfn->num_file_names, const char *); |
| 3201 | |
| 3202 | if (qfn->real_names[index] == NULL) |
| 3203 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
| 3204 | |
| 3205 | return qfn->real_names[index]; |
| 3206 | } |
| 3207 | |
| 3208 | static struct symtab * |
| 3209 | dw2_find_last_source_symtab (struct objfile *objfile) |
| 3210 | { |
| 3211 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3212 | = get_dwarf2_per_objfile (objfile); |
| 3213 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
| 3214 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
| 3215 | |
| 3216 | if (cust == NULL) |
| 3217 | return NULL; |
| 3218 | |
| 3219 | return compunit_primary_filetab (cust); |
| 3220 | } |
| 3221 | |
| 3222 | /* Traversal function for dw2_forget_cached_source_info. */ |
| 3223 | |
| 3224 | static int |
| 3225 | dw2_free_cached_file_names (void **slot, void *info) |
| 3226 | { |
| 3227 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
| 3228 | |
| 3229 | if (file_data->real_names) |
| 3230 | { |
| 3231 | int i; |
| 3232 | |
| 3233 | for (i = 0; i < file_data->num_file_names; ++i) |
| 3234 | { |
| 3235 | xfree ((void*) file_data->real_names[i]); |
| 3236 | file_data->real_names[i] = NULL; |
| 3237 | } |
| 3238 | } |
| 3239 | |
| 3240 | return 1; |
| 3241 | } |
| 3242 | |
| 3243 | static void |
| 3244 | dw2_forget_cached_source_info (struct objfile *objfile) |
| 3245 | { |
| 3246 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3247 | = get_dwarf2_per_objfile (objfile); |
| 3248 | |
| 3249 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table.get (), |
| 3250 | dw2_free_cached_file_names, NULL); |
| 3251 | } |
| 3252 | |
| 3253 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
| 3254 | the symtabs and calls the iterator. */ |
| 3255 | |
| 3256 | static int |
| 3257 | dw2_map_expand_apply (struct objfile *objfile, |
| 3258 | struct dwarf2_per_cu_data *per_cu, |
| 3259 | const char *name, const char *real_path, |
| 3260 | gdb::function_view<bool (symtab *)> callback) |
| 3261 | { |
| 3262 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
| 3263 | |
| 3264 | /* Don't visit already-expanded CUs. */ |
| 3265 | if (per_cu->v.quick->compunit_symtab) |
| 3266 | return 0; |
| 3267 | |
| 3268 | /* This may expand more than one symtab, and we want to iterate over |
| 3269 | all of them. */ |
| 3270 | dw2_instantiate_symtab (per_cu, false); |
| 3271 | |
| 3272 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
| 3273 | last_made, callback); |
| 3274 | } |
| 3275 | |
| 3276 | /* Implementation of the map_symtabs_matching_filename method. */ |
| 3277 | |
| 3278 | static bool |
| 3279 | dw2_map_symtabs_matching_filename |
| 3280 | (struct objfile *objfile, const char *name, const char *real_path, |
| 3281 | gdb::function_view<bool (symtab *)> callback) |
| 3282 | { |
| 3283 | const char *name_basename = lbasename (name); |
| 3284 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3285 | = get_dwarf2_per_objfile (objfile); |
| 3286 | |
| 3287 | /* The rule is CUs specify all the files, including those used by |
| 3288 | any TU, so there's no need to scan TUs here. */ |
| 3289 | |
| 3290 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 3291 | { |
| 3292 | /* We only need to look at symtabs not already expanded. */ |
| 3293 | if (per_cu->v.quick->compunit_symtab) |
| 3294 | continue; |
| 3295 | |
| 3296 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
| 3297 | if (file_data == NULL) |
| 3298 | continue; |
| 3299 | |
| 3300 | for (int j = 0; j < file_data->num_file_names; ++j) |
| 3301 | { |
| 3302 | const char *this_name = file_data->file_names[j]; |
| 3303 | const char *this_real_name; |
| 3304 | |
| 3305 | if (compare_filenames_for_search (this_name, name)) |
| 3306 | { |
| 3307 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 3308 | callback)) |
| 3309 | return true; |
| 3310 | continue; |
| 3311 | } |
| 3312 | |
| 3313 | /* Before we invoke realpath, which can get expensive when many |
| 3314 | files are involved, do a quick comparison of the basenames. */ |
| 3315 | if (! basenames_may_differ |
| 3316 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) |
| 3317 | continue; |
| 3318 | |
| 3319 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
| 3320 | if (compare_filenames_for_search (this_real_name, name)) |
| 3321 | { |
| 3322 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 3323 | callback)) |
| 3324 | return true; |
| 3325 | continue; |
| 3326 | } |
| 3327 | |
| 3328 | if (real_path != NULL) |
| 3329 | { |
| 3330 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
| 3331 | gdb_assert (IS_ABSOLUTE_PATH (name)); |
| 3332 | if (this_real_name != NULL |
| 3333 | && FILENAME_CMP (real_path, this_real_name) == 0) |
| 3334 | { |
| 3335 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 3336 | callback)) |
| 3337 | return true; |
| 3338 | continue; |
| 3339 | } |
| 3340 | } |
| 3341 | } |
| 3342 | } |
| 3343 | |
| 3344 | return false; |
| 3345 | } |
| 3346 | |
| 3347 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
| 3348 | |
| 3349 | struct dw2_symtab_iterator |
| 3350 | { |
| 3351 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
| 3352 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 3353 | /* If set, only look for symbols that match that block. Valid values are |
| 3354 | GLOBAL_BLOCK and STATIC_BLOCK. */ |
| 3355 | gdb::optional<block_enum> block_index; |
| 3356 | /* The kind of symbol we're looking for. */ |
| 3357 | domain_enum domain; |
| 3358 | /* The list of CUs from the index entry of the symbol, |
| 3359 | or NULL if not found. */ |
| 3360 | offset_type *vec; |
| 3361 | /* The next element in VEC to look at. */ |
| 3362 | int next; |
| 3363 | /* The number of elements in VEC, or zero if there is no match. */ |
| 3364 | int length; |
| 3365 | /* Have we seen a global version of the symbol? |
| 3366 | If so we can ignore all further global instances. |
| 3367 | This is to work around gold/15646, inefficient gold-generated |
| 3368 | indices. */ |
| 3369 | int global_seen; |
| 3370 | }; |
| 3371 | |
| 3372 | /* Initialize the index symtab iterator ITER. */ |
| 3373 | |
| 3374 | static void |
| 3375 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
| 3376 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3377 | gdb::optional<block_enum> block_index, |
| 3378 | domain_enum domain, |
| 3379 | const char *name) |
| 3380 | { |
| 3381 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
| 3382 | iter->block_index = block_index; |
| 3383 | iter->domain = domain; |
| 3384 | iter->next = 0; |
| 3385 | iter->global_seen = 0; |
| 3386 | |
| 3387 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
| 3388 | |
| 3389 | /* index is NULL if OBJF_READNOW. */ |
| 3390 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) |
| 3391 | iter->length = MAYBE_SWAP (*iter->vec); |
| 3392 | else |
| 3393 | { |
| 3394 | iter->vec = NULL; |
| 3395 | iter->length = 0; |
| 3396 | } |
| 3397 | } |
| 3398 | |
| 3399 | /* Return the next matching CU or NULL if there are no more. */ |
| 3400 | |
| 3401 | static struct dwarf2_per_cu_data * |
| 3402 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) |
| 3403 | { |
| 3404 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
| 3405 | |
| 3406 | for ( ; iter->next < iter->length; ++iter->next) |
| 3407 | { |
| 3408 | offset_type cu_index_and_attrs = |
| 3409 | MAYBE_SWAP (iter->vec[iter->next + 1]); |
| 3410 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
| 3411 | gdb_index_symbol_kind symbol_kind = |
| 3412 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); |
| 3413 | /* Only check the symbol attributes if they're present. |
| 3414 | Indices prior to version 7 don't record them, |
| 3415 | and indices >= 7 may elide them for certain symbols |
| 3416 | (gold does this). */ |
| 3417 | int attrs_valid = |
| 3418 | (dwarf2_per_objfile->index_table->version >= 7 |
| 3419 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
| 3420 | |
| 3421 | /* Don't crash on bad data. */ |
| 3422 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
| 3423 | + dwarf2_per_objfile->all_type_units.size ())) |
| 3424 | { |
| 3425 | complaint (_(".gdb_index entry has bad CU index" |
| 3426 | " [in module %s]"), |
| 3427 | objfile_name (dwarf2_per_objfile->objfile)); |
| 3428 | continue; |
| 3429 | } |
| 3430 | |
| 3431 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
| 3432 | |
| 3433 | /* Skip if already read in. */ |
| 3434 | if (per_cu->v.quick->compunit_symtab) |
| 3435 | continue; |
| 3436 | |
| 3437 | /* Check static vs global. */ |
| 3438 | if (attrs_valid) |
| 3439 | { |
| 3440 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
| 3441 | |
| 3442 | if (iter->block_index.has_value ()) |
| 3443 | { |
| 3444 | bool want_static = *iter->block_index == STATIC_BLOCK; |
| 3445 | |
| 3446 | if (is_static != want_static) |
| 3447 | continue; |
| 3448 | } |
| 3449 | |
| 3450 | /* Work around gold/15646. */ |
| 3451 | if (!is_static && iter->global_seen) |
| 3452 | continue; |
| 3453 | if (!is_static) |
| 3454 | iter->global_seen = 1; |
| 3455 | } |
| 3456 | |
| 3457 | /* Only check the symbol's kind if it has one. */ |
| 3458 | if (attrs_valid) |
| 3459 | { |
| 3460 | switch (iter->domain) |
| 3461 | { |
| 3462 | case VAR_DOMAIN: |
| 3463 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE |
| 3464 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION |
| 3465 | /* Some types are also in VAR_DOMAIN. */ |
| 3466 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 3467 | continue; |
| 3468 | break; |
| 3469 | case STRUCT_DOMAIN: |
| 3470 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 3471 | continue; |
| 3472 | break; |
| 3473 | case LABEL_DOMAIN: |
| 3474 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) |
| 3475 | continue; |
| 3476 | break; |
| 3477 | case MODULE_DOMAIN: |
| 3478 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) |
| 3479 | continue; |
| 3480 | break; |
| 3481 | default: |
| 3482 | break; |
| 3483 | } |
| 3484 | } |
| 3485 | |
| 3486 | ++iter->next; |
| 3487 | return per_cu; |
| 3488 | } |
| 3489 | |
| 3490 | return NULL; |
| 3491 | } |
| 3492 | |
| 3493 | static struct compunit_symtab * |
| 3494 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
| 3495 | const char *name, domain_enum domain) |
| 3496 | { |
| 3497 | struct compunit_symtab *stab_best = NULL; |
| 3498 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3499 | = get_dwarf2_per_objfile (objfile); |
| 3500 | |
| 3501 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
| 3502 | |
| 3503 | struct dw2_symtab_iterator iter; |
| 3504 | struct dwarf2_per_cu_data *per_cu; |
| 3505 | |
| 3506 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
| 3507 | |
| 3508 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
| 3509 | { |
| 3510 | struct symbol *sym, *with_opaque = NULL; |
| 3511 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
| 3512 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
| 3513 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 3514 | |
| 3515 | sym = block_find_symbol (block, name, domain, |
| 3516 | block_find_non_opaque_type_preferred, |
| 3517 | &with_opaque); |
| 3518 | |
| 3519 | /* Some caution must be observed with overloaded functions |
| 3520 | and methods, since the index will not contain any overload |
| 3521 | information (but NAME might contain it). */ |
| 3522 | |
| 3523 | if (sym != NULL |
| 3524 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
| 3525 | return stab; |
| 3526 | if (with_opaque != NULL |
| 3527 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
| 3528 | stab_best = stab; |
| 3529 | |
| 3530 | /* Keep looking through other CUs. */ |
| 3531 | } |
| 3532 | |
| 3533 | return stab_best; |
| 3534 | } |
| 3535 | |
| 3536 | static void |
| 3537 | dw2_print_stats (struct objfile *objfile) |
| 3538 | { |
| 3539 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3540 | = get_dwarf2_per_objfile (objfile); |
| 3541 | int total = (dwarf2_per_objfile->all_comp_units.size () |
| 3542 | + dwarf2_per_objfile->all_type_units.size ()); |
| 3543 | int count = 0; |
| 3544 | |
| 3545 | for (int i = 0; i < total; ++i) |
| 3546 | { |
| 3547 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
| 3548 | |
| 3549 | if (!per_cu->v.quick->compunit_symtab) |
| 3550 | ++count; |
| 3551 | } |
| 3552 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
| 3553 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
| 3554 | } |
| 3555 | |
| 3556 | /* This dumps minimal information about the index. |
| 3557 | It is called via "mt print objfiles". |
| 3558 | One use is to verify .gdb_index has been loaded by the |
| 3559 | gdb.dwarf2/gdb-index.exp testcase. */ |
| 3560 | |
| 3561 | static void |
| 3562 | dw2_dump (struct objfile *objfile) |
| 3563 | { |
| 3564 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3565 | = get_dwarf2_per_objfile (objfile); |
| 3566 | |
| 3567 | gdb_assert (dwarf2_per_objfile->using_index); |
| 3568 | printf_filtered (".gdb_index:"); |
| 3569 | if (dwarf2_per_objfile->index_table != NULL) |
| 3570 | { |
| 3571 | printf_filtered (" version %d\n", |
| 3572 | dwarf2_per_objfile->index_table->version); |
| 3573 | } |
| 3574 | else |
| 3575 | printf_filtered (" faked for \"readnow\"\n"); |
| 3576 | printf_filtered ("\n"); |
| 3577 | } |
| 3578 | |
| 3579 | static void |
| 3580 | dw2_expand_symtabs_for_function (struct objfile *objfile, |
| 3581 | const char *func_name) |
| 3582 | { |
| 3583 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3584 | = get_dwarf2_per_objfile (objfile); |
| 3585 | |
| 3586 | struct dw2_symtab_iterator iter; |
| 3587 | struct dwarf2_per_cu_data *per_cu; |
| 3588 | |
| 3589 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
| 3590 | |
| 3591 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
| 3592 | dw2_instantiate_symtab (per_cu, false); |
| 3593 | |
| 3594 | } |
| 3595 | |
| 3596 | static void |
| 3597 | dw2_expand_all_symtabs (struct objfile *objfile) |
| 3598 | { |
| 3599 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3600 | = get_dwarf2_per_objfile (objfile); |
| 3601 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
| 3602 | + dwarf2_per_objfile->all_type_units.size ()); |
| 3603 | |
| 3604 | for (int i = 0; i < total_units; ++i) |
| 3605 | { |
| 3606 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
| 3607 | |
| 3608 | /* We don't want to directly expand a partial CU, because if we |
| 3609 | read it with the wrong language, then assertion failures can |
| 3610 | be triggered later on. See PR symtab/23010. So, tell |
| 3611 | dw2_instantiate_symtab to skip partial CUs -- any important |
| 3612 | partial CU will be read via DW_TAG_imported_unit anyway. */ |
| 3613 | dw2_instantiate_symtab (per_cu, true); |
| 3614 | } |
| 3615 | } |
| 3616 | |
| 3617 | static void |
| 3618 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
| 3619 | const char *fullname) |
| 3620 | { |
| 3621 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3622 | = get_dwarf2_per_objfile (objfile); |
| 3623 | |
| 3624 | /* We don't need to consider type units here. |
| 3625 | This is only called for examining code, e.g. expand_line_sal. |
| 3626 | There can be an order of magnitude (or more) more type units |
| 3627 | than comp units, and we avoid them if we can. */ |
| 3628 | |
| 3629 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 3630 | { |
| 3631 | /* We only need to look at symtabs not already expanded. */ |
| 3632 | if (per_cu->v.quick->compunit_symtab) |
| 3633 | continue; |
| 3634 | |
| 3635 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
| 3636 | if (file_data == NULL) |
| 3637 | continue; |
| 3638 | |
| 3639 | for (int j = 0; j < file_data->num_file_names; ++j) |
| 3640 | { |
| 3641 | const char *this_fullname = file_data->file_names[j]; |
| 3642 | |
| 3643 | if (filename_cmp (this_fullname, fullname) == 0) |
| 3644 | { |
| 3645 | dw2_instantiate_symtab (per_cu, false); |
| 3646 | break; |
| 3647 | } |
| 3648 | } |
| 3649 | } |
| 3650 | } |
| 3651 | |
| 3652 | static void |
| 3653 | dw2_expand_symtabs_matching_symbol |
| 3654 | (mapped_index_base &index, |
| 3655 | const lookup_name_info &lookup_name_in, |
| 3656 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 3657 | enum search_domain kind, |
| 3658 | gdb::function_view<bool (offset_type)> match_callback); |
| 3659 | |
| 3660 | static void |
| 3661 | dw2_expand_symtabs_matching_one |
| 3662 | (struct dwarf2_per_cu_data *per_cu, |
| 3663 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 3664 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify); |
| 3665 | |
| 3666 | static void |
| 3667 | dw2_map_matching_symbols |
| 3668 | (struct objfile *objfile, |
| 3669 | const lookup_name_info &name, domain_enum domain, |
| 3670 | int global, |
| 3671 | gdb::function_view<symbol_found_callback_ftype> callback, |
| 3672 | symbol_compare_ftype *ordered_compare) |
| 3673 | { |
| 3674 | /* Used for Ada. */ |
| 3675 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3676 | = get_dwarf2_per_objfile (objfile); |
| 3677 | |
| 3678 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; |
| 3679 | |
| 3680 | if (dwarf2_per_objfile->index_table != nullptr) |
| 3681 | { |
| 3682 | /* Ada currently doesn't support .gdb_index (see PR24713). We can get |
| 3683 | here though if the current language is Ada for a non-Ada objfile |
| 3684 | using GNU index. */ |
| 3685 | mapped_index &index = *dwarf2_per_objfile->index_table; |
| 3686 | |
| 3687 | const char *match_name = name.ada ().lookup_name ().c_str (); |
| 3688 | auto matcher = [&] (const char *symname) |
| 3689 | { |
| 3690 | if (ordered_compare == nullptr) |
| 3691 | return true; |
| 3692 | return ordered_compare (symname, match_name) == 0; |
| 3693 | }; |
| 3694 | |
| 3695 | dw2_expand_symtabs_matching_symbol (index, name, matcher, ALL_DOMAIN, |
| 3696 | [&] (offset_type namei) |
| 3697 | { |
| 3698 | struct dw2_symtab_iterator iter; |
| 3699 | struct dwarf2_per_cu_data *per_cu; |
| 3700 | |
| 3701 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_kind, domain, |
| 3702 | match_name); |
| 3703 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
| 3704 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); |
| 3705 | return true; |
| 3706 | }); |
| 3707 | } |
| 3708 | else |
| 3709 | { |
| 3710 | /* We have -readnow: no .gdb_index, but no partial symtabs either. So, |
| 3711 | proceed assuming all symtabs have been read in. */ |
| 3712 | } |
| 3713 | |
| 3714 | for (compunit_symtab *cust : objfile->compunits ()) |
| 3715 | { |
| 3716 | const struct block *block; |
| 3717 | |
| 3718 | if (cust == NULL) |
| 3719 | continue; |
| 3720 | block = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); |
| 3721 | if (!iterate_over_symbols_terminated (block, name, |
| 3722 | domain, callback)) |
| 3723 | return; |
| 3724 | } |
| 3725 | } |
| 3726 | |
| 3727 | /* Starting from a search name, return the string that finds the upper |
| 3728 | bound of all strings that start with SEARCH_NAME in a sorted name |
| 3729 | list. Returns the empty string to indicate that the upper bound is |
| 3730 | the end of the list. */ |
| 3731 | |
| 3732 | static std::string |
| 3733 | make_sort_after_prefix_name (const char *search_name) |
| 3734 | { |
| 3735 | /* When looking to complete "func", we find the upper bound of all |
| 3736 | symbols that start with "func" by looking for where we'd insert |
| 3737 | the closest string that would follow "func" in lexicographical |
| 3738 | order. Usually, that's "func"-with-last-character-incremented, |
| 3739 | i.e. "fund". Mind non-ASCII characters, though. Usually those |
| 3740 | will be UTF-8 multi-byte sequences, but we can't be certain. |
| 3741 | Especially mind the 0xff character, which is a valid character in |
| 3742 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't |
| 3743 | rule out compilers allowing it in identifiers. Note that |
| 3744 | conveniently, strcmp/strcasecmp are specified to compare |
| 3745 | characters interpreted as unsigned char. So what we do is treat |
| 3746 | the whole string as a base 256 number composed of a sequence of |
| 3747 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps |
| 3748 | to 0, and carries 1 to the following more-significant position. |
| 3749 | If the very first character in SEARCH_NAME ends up incremented |
| 3750 | and carries/overflows, then the upper bound is the end of the |
| 3751 | list. The string after the empty string is also the empty |
| 3752 | string. |
| 3753 | |
| 3754 | Some examples of this operation: |
| 3755 | |
| 3756 | SEARCH_NAME => "+1" RESULT |
| 3757 | |
| 3758 | "abc" => "abd" |
| 3759 | "ab\xff" => "ac" |
| 3760 | "\xff" "a" "\xff" => "\xff" "b" |
| 3761 | "\xff" => "" |
| 3762 | "\xff\xff" => "" |
| 3763 | "" => "" |
| 3764 | |
| 3765 | Then, with these symbols for example: |
| 3766 | |
| 3767 | func |
| 3768 | func1 |
| 3769 | fund |
| 3770 | |
| 3771 | completing "func" looks for symbols between "func" and |
| 3772 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), |
| 3773 | which finds "func" and "func1", but not "fund". |
| 3774 | |
| 3775 | And with: |
| 3776 | |
| 3777 | funcÿ (Latin1 'ÿ' [0xff]) |
| 3778 | funcÿ1 |
| 3779 | fund |
| 3780 | |
| 3781 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" |
| 3782 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". |
| 3783 | |
| 3784 | And with: |
| 3785 | |
| 3786 | ÿÿ (Latin1 'ÿ' [0xff]) |
| 3787 | ÿÿ1 |
| 3788 | |
| 3789 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and |
| 3790 | the end of the list. |
| 3791 | */ |
| 3792 | std::string after = search_name; |
| 3793 | while (!after.empty () && (unsigned char) after.back () == 0xff) |
| 3794 | after.pop_back (); |
| 3795 | if (!after.empty ()) |
| 3796 | after.back () = (unsigned char) after.back () + 1; |
| 3797 | return after; |
| 3798 | } |
| 3799 | |
| 3800 | /* See declaration. */ |
| 3801 | |
| 3802 | std::pair<std::vector<name_component>::const_iterator, |
| 3803 | std::vector<name_component>::const_iterator> |
| 3804 | mapped_index_base::find_name_components_bounds |
| 3805 | (const lookup_name_info &lookup_name_without_params, language lang) const |
| 3806 | { |
| 3807 | auto *name_cmp |
| 3808 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; |
| 3809 | |
| 3810 | const char *lang_name |
| 3811 | = lookup_name_without_params.language_lookup_name (lang); |
| 3812 | |
| 3813 | /* Comparison function object for lower_bound that matches against a |
| 3814 | given symbol name. */ |
| 3815 | auto lookup_compare_lower = [&] (const name_component &elem, |
| 3816 | const char *name) |
| 3817 | { |
| 3818 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
| 3819 | const char *elem_name = elem_qualified + elem.name_offset; |
| 3820 | return name_cmp (elem_name, name) < 0; |
| 3821 | }; |
| 3822 | |
| 3823 | /* Comparison function object for upper_bound that matches against a |
| 3824 | given symbol name. */ |
| 3825 | auto lookup_compare_upper = [&] (const char *name, |
| 3826 | const name_component &elem) |
| 3827 | { |
| 3828 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
| 3829 | const char *elem_name = elem_qualified + elem.name_offset; |
| 3830 | return name_cmp (name, elem_name) < 0; |
| 3831 | }; |
| 3832 | |
| 3833 | auto begin = this->name_components.begin (); |
| 3834 | auto end = this->name_components.end (); |
| 3835 | |
| 3836 | /* Find the lower bound. */ |
| 3837 | auto lower = [&] () |
| 3838 | { |
| 3839 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
| 3840 | return begin; |
| 3841 | else |
| 3842 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
| 3843 | } (); |
| 3844 | |
| 3845 | /* Find the upper bound. */ |
| 3846 | auto upper = [&] () |
| 3847 | { |
| 3848 | if (lookup_name_without_params.completion_mode ()) |
| 3849 | { |
| 3850 | /* In completion mode, we want UPPER to point past all |
| 3851 | symbols names that have the same prefix. I.e., with |
| 3852 | these symbols, and completing "func": |
| 3853 | |
| 3854 | function << lower bound |
| 3855 | function1 |
| 3856 | other_function << upper bound |
| 3857 | |
| 3858 | We find the upper bound by looking for the insertion |
| 3859 | point of "func"-with-last-character-incremented, |
| 3860 | i.e. "fund". */ |
| 3861 | std::string after = make_sort_after_prefix_name (lang_name); |
| 3862 | if (after.empty ()) |
| 3863 | return end; |
| 3864 | return std::lower_bound (lower, end, after.c_str (), |
| 3865 | lookup_compare_lower); |
| 3866 | } |
| 3867 | else |
| 3868 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
| 3869 | } (); |
| 3870 | |
| 3871 | return {lower, upper}; |
| 3872 | } |
| 3873 | |
| 3874 | /* See declaration. */ |
| 3875 | |
| 3876 | void |
| 3877 | mapped_index_base::build_name_components () |
| 3878 | { |
| 3879 | if (!this->name_components.empty ()) |
| 3880 | return; |
| 3881 | |
| 3882 | this->name_components_casing = case_sensitivity; |
| 3883 | auto *name_cmp |
| 3884 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; |
| 3885 | |
| 3886 | /* The code below only knows how to break apart components of C++ |
| 3887 | symbol names (and other languages that use '::' as |
| 3888 | namespace/module separator) and Ada symbol names. */ |
| 3889 | auto count = this->symbol_name_count (); |
| 3890 | for (offset_type idx = 0; idx < count; idx++) |
| 3891 | { |
| 3892 | if (this->symbol_name_slot_invalid (idx)) |
| 3893 | continue; |
| 3894 | |
| 3895 | const char *name = this->symbol_name_at (idx); |
| 3896 | |
| 3897 | /* Add each name component to the name component table. */ |
| 3898 | unsigned int previous_len = 0; |
| 3899 | |
| 3900 | if (strstr (name, "::") != nullptr) |
| 3901 | { |
| 3902 | for (unsigned int current_len = cp_find_first_component (name); |
| 3903 | name[current_len] != '\0'; |
| 3904 | current_len += cp_find_first_component (name + current_len)) |
| 3905 | { |
| 3906 | gdb_assert (name[current_len] == ':'); |
| 3907 | this->name_components.push_back ({previous_len, idx}); |
| 3908 | /* Skip the '::'. */ |
| 3909 | current_len += 2; |
| 3910 | previous_len = current_len; |
| 3911 | } |
| 3912 | } |
| 3913 | else |
| 3914 | { |
| 3915 | /* Handle the Ada encoded (aka mangled) form here. */ |
| 3916 | for (const char *iter = strstr (name, "__"); |
| 3917 | iter != nullptr; |
| 3918 | iter = strstr (iter, "__")) |
| 3919 | { |
| 3920 | this->name_components.push_back ({previous_len, idx}); |
| 3921 | iter += 2; |
| 3922 | previous_len = iter - name; |
| 3923 | } |
| 3924 | } |
| 3925 | |
| 3926 | this->name_components.push_back ({previous_len, idx}); |
| 3927 | } |
| 3928 | |
| 3929 | /* Sort name_components elements by name. */ |
| 3930 | auto name_comp_compare = [&] (const name_component &left, |
| 3931 | const name_component &right) |
| 3932 | { |
| 3933 | const char *left_qualified = this->symbol_name_at (left.idx); |
| 3934 | const char *right_qualified = this->symbol_name_at (right.idx); |
| 3935 | |
| 3936 | const char *left_name = left_qualified + left.name_offset; |
| 3937 | const char *right_name = right_qualified + right.name_offset; |
| 3938 | |
| 3939 | return name_cmp (left_name, right_name) < 0; |
| 3940 | }; |
| 3941 | |
| 3942 | std::sort (this->name_components.begin (), |
| 3943 | this->name_components.end (), |
| 3944 | name_comp_compare); |
| 3945 | } |
| 3946 | |
| 3947 | /* Helper for dw2_expand_symtabs_matching that works with a |
| 3948 | mapped_index_base instead of the containing objfile. This is split |
| 3949 | to a separate function in order to be able to unit test the |
| 3950 | name_components matching using a mock mapped_index_base. For each |
| 3951 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
| 3952 | symbol's index in the mapped_index_base symbol table. */ |
| 3953 | |
| 3954 | static void |
| 3955 | dw2_expand_symtabs_matching_symbol |
| 3956 | (mapped_index_base &index, |
| 3957 | const lookup_name_info &lookup_name_in, |
| 3958 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 3959 | enum search_domain kind, |
| 3960 | gdb::function_view<bool (offset_type)> match_callback) |
| 3961 | { |
| 3962 | lookup_name_info lookup_name_without_params |
| 3963 | = lookup_name_in.make_ignore_params (); |
| 3964 | |
| 3965 | /* Build the symbol name component sorted vector, if we haven't |
| 3966 | yet. */ |
| 3967 | index.build_name_components (); |
| 3968 | |
| 3969 | /* The same symbol may appear more than once in the range though. |
| 3970 | E.g., if we're looking for symbols that complete "w", and we have |
| 3971 | a symbol named "w1::w2", we'll find the two name components for |
| 3972 | that same symbol in the range. To be sure we only call the |
| 3973 | callback once per symbol, we first collect the symbol name |
| 3974 | indexes that matched in a temporary vector and ignore |
| 3975 | duplicates. */ |
| 3976 | std::vector<offset_type> matches; |
| 3977 | |
| 3978 | struct name_and_matcher |
| 3979 | { |
| 3980 | symbol_name_matcher_ftype *matcher; |
| 3981 | const char *name; |
| 3982 | |
| 3983 | bool operator== (const name_and_matcher &other) const |
| 3984 | { |
| 3985 | return matcher == other.matcher && strcmp (name, other.name) == 0; |
| 3986 | } |
| 3987 | }; |
| 3988 | |
| 3989 | /* A vector holding all the different symbol name matchers, for all |
| 3990 | languages. */ |
| 3991 | std::vector<name_and_matcher> matchers; |
| 3992 | |
| 3993 | for (int i = 0; i < nr_languages; i++) |
| 3994 | { |
| 3995 | enum language lang_e = (enum language) i; |
| 3996 | |
| 3997 | const language_defn *lang = language_def (lang_e); |
| 3998 | symbol_name_matcher_ftype *name_matcher |
| 3999 | = get_symbol_name_matcher (lang, lookup_name_without_params); |
| 4000 | |
| 4001 | name_and_matcher key { |
| 4002 | name_matcher, |
| 4003 | lookup_name_without_params.language_lookup_name (lang_e) |
| 4004 | }; |
| 4005 | |
| 4006 | /* Don't insert the same comparison routine more than once. |
| 4007 | Note that we do this linear walk. This is not a problem in |
| 4008 | practice because the number of supported languages is |
| 4009 | low. */ |
| 4010 | if (std::find (matchers.begin (), matchers.end (), key) |
| 4011 | != matchers.end ()) |
| 4012 | continue; |
| 4013 | matchers.push_back (std::move (key)); |
| 4014 | |
| 4015 | auto bounds |
| 4016 | = index.find_name_components_bounds (lookup_name_without_params, |
| 4017 | lang_e); |
| 4018 | |
| 4019 | /* Now for each symbol name in range, check to see if we have a name |
| 4020 | match, and if so, call the MATCH_CALLBACK callback. */ |
| 4021 | |
| 4022 | for (; bounds.first != bounds.second; ++bounds.first) |
| 4023 | { |
| 4024 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
| 4025 | |
| 4026 | if (!name_matcher (qualified, lookup_name_without_params, NULL) |
| 4027 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) |
| 4028 | continue; |
| 4029 | |
| 4030 | matches.push_back (bounds.first->idx); |
| 4031 | } |
| 4032 | } |
| 4033 | |
| 4034 | std::sort (matches.begin (), matches.end ()); |
| 4035 | |
| 4036 | /* Finally call the callback, once per match. */ |
| 4037 | ULONGEST prev = -1; |
| 4038 | for (offset_type idx : matches) |
| 4039 | { |
| 4040 | if (prev != idx) |
| 4041 | { |
| 4042 | if (!match_callback (idx)) |
| 4043 | break; |
| 4044 | prev = idx; |
| 4045 | } |
| 4046 | } |
| 4047 | |
| 4048 | /* Above we use a type wider than idx's for 'prev', since 0 and |
| 4049 | (offset_type)-1 are both possible values. */ |
| 4050 | static_assert (sizeof (prev) > sizeof (offset_type), ""); |
| 4051 | } |
| 4052 | |
| 4053 | #if GDB_SELF_TEST |
| 4054 | |
| 4055 | namespace selftests { namespace dw2_expand_symtabs_matching { |
| 4056 | |
| 4057 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
| 4058 | exercise dw2_expand_symtabs_matching_symbol, which works with the |
| 4059 | mapped_index_base interface. Builds an index from the symbol list |
| 4060 | passed as parameter to the constructor. */ |
| 4061 | class mock_mapped_index : public mapped_index_base |
| 4062 | { |
| 4063 | public: |
| 4064 | mock_mapped_index (gdb::array_view<const char *> symbols) |
| 4065 | : m_symbol_table (symbols) |
| 4066 | {} |
| 4067 | |
| 4068 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
| 4069 | |
| 4070 | /* Return the number of names in the symbol table. */ |
| 4071 | size_t symbol_name_count () const override |
| 4072 | { |
| 4073 | return m_symbol_table.size (); |
| 4074 | } |
| 4075 | |
| 4076 | /* Get the name of the symbol at IDX in the symbol table. */ |
| 4077 | const char *symbol_name_at (offset_type idx) const override |
| 4078 | { |
| 4079 | return m_symbol_table[idx]; |
| 4080 | } |
| 4081 | |
| 4082 | private: |
| 4083 | gdb::array_view<const char *> m_symbol_table; |
| 4084 | }; |
| 4085 | |
| 4086 | /* Convenience function that converts a NULL pointer to a "<null>" |
| 4087 | string, to pass to print routines. */ |
| 4088 | |
| 4089 | static const char * |
| 4090 | string_or_null (const char *str) |
| 4091 | { |
| 4092 | return str != NULL ? str : "<null>"; |
| 4093 | } |
| 4094 | |
| 4095 | /* Check if a lookup_name_info built from |
| 4096 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock |
| 4097 | index. EXPECTED_LIST is the list of expected matches, in expected |
| 4098 | matching order. If no match expected, then an empty list is |
| 4099 | specified. Returns true on success. On failure prints a warning |
| 4100 | indicating the file:line that failed, and returns false. */ |
| 4101 | |
| 4102 | static bool |
| 4103 | check_match (const char *file, int line, |
| 4104 | mock_mapped_index &mock_index, |
| 4105 | const char *name, symbol_name_match_type match_type, |
| 4106 | bool completion_mode, |
| 4107 | std::initializer_list<const char *> expected_list) |
| 4108 | { |
| 4109 | lookup_name_info lookup_name (name, match_type, completion_mode); |
| 4110 | |
| 4111 | bool matched = true; |
| 4112 | |
| 4113 | auto mismatch = [&] (const char *expected_str, |
| 4114 | const char *got) |
| 4115 | { |
| 4116 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " |
| 4117 | "expected=\"%s\", got=\"%s\"\n"), |
| 4118 | file, line, |
| 4119 | (match_type == symbol_name_match_type::FULL |
| 4120 | ? "FULL" : "WILD"), |
| 4121 | name, string_or_null (expected_str), string_or_null (got)); |
| 4122 | matched = false; |
| 4123 | }; |
| 4124 | |
| 4125 | auto expected_it = expected_list.begin (); |
| 4126 | auto expected_end = expected_list.end (); |
| 4127 | |
| 4128 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
| 4129 | NULL, ALL_DOMAIN, |
| 4130 | [&] (offset_type idx) |
| 4131 | { |
| 4132 | const char *matched_name = mock_index.symbol_name_at (idx); |
| 4133 | const char *expected_str |
| 4134 | = expected_it == expected_end ? NULL : *expected_it++; |
| 4135 | |
| 4136 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) |
| 4137 | mismatch (expected_str, matched_name); |
| 4138 | return true; |
| 4139 | }); |
| 4140 | |
| 4141 | const char *expected_str |
| 4142 | = expected_it == expected_end ? NULL : *expected_it++; |
| 4143 | if (expected_str != NULL) |
| 4144 | mismatch (expected_str, NULL); |
| 4145 | |
| 4146 | return matched; |
| 4147 | } |
| 4148 | |
| 4149 | /* The symbols added to the mock mapped_index for testing (in |
| 4150 | canonical form). */ |
| 4151 | static const char *test_symbols[] = { |
| 4152 | "function", |
| 4153 | "std::bar", |
| 4154 | "std::zfunction", |
| 4155 | "std::zfunction2", |
| 4156 | "w1::w2", |
| 4157 | "ns::foo<char*>", |
| 4158 | "ns::foo<int>", |
| 4159 | "ns::foo<long>", |
| 4160 | "ns2::tmpl<int>::foo2", |
| 4161 | "(anonymous namespace)::A::B::C", |
| 4162 | |
| 4163 | /* These are used to check that the increment-last-char in the |
| 4164 | matching algorithm for completion doesn't match "t1_fund" when |
| 4165 | completing "t1_func". */ |
| 4166 | "t1_func", |
| 4167 | "t1_func1", |
| 4168 | "t1_fund", |
| 4169 | "t1_fund1", |
| 4170 | |
| 4171 | /* A UTF-8 name with multi-byte sequences to make sure that |
| 4172 | cp-name-parser understands this as a single identifier ("função" |
| 4173 | is "function" in PT). */ |
| 4174 | u8"u8função", |
| 4175 | |
| 4176 | /* \377 (0xff) is Latin1 'ÿ'. */ |
| 4177 | "yfunc\377", |
| 4178 | |
| 4179 | /* \377 (0xff) is Latin1 'ÿ'. */ |
| 4180 | "\377", |
| 4181 | "\377\377123", |
| 4182 | |
| 4183 | /* A name with all sorts of complications. Starts with "z" to make |
| 4184 | it easier for the completion tests below. */ |
| 4185 | #define Z_SYM_NAME \ |
| 4186 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ |
| 4187 | "::tuple<(anonymous namespace)::ui*, " \ |
| 4188 | "std::default_delete<(anonymous namespace)::ui>, void>" |
| 4189 | |
| 4190 | Z_SYM_NAME |
| 4191 | }; |
| 4192 | |
| 4193 | /* Returns true if the mapped_index_base::find_name_component_bounds |
| 4194 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, |
| 4195 | in completion mode. */ |
| 4196 | |
| 4197 | static bool |
| 4198 | check_find_bounds_finds (mapped_index_base &index, |
| 4199 | const char *search_name, |
| 4200 | gdb::array_view<const char *> expected_syms) |
| 4201 | { |
| 4202 | lookup_name_info lookup_name (search_name, |
| 4203 | symbol_name_match_type::FULL, true); |
| 4204 | |
| 4205 | auto bounds = index.find_name_components_bounds (lookup_name, |
| 4206 | language_cplus); |
| 4207 | |
| 4208 | size_t distance = std::distance (bounds.first, bounds.second); |
| 4209 | if (distance != expected_syms.size ()) |
| 4210 | return false; |
| 4211 | |
| 4212 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) |
| 4213 | { |
| 4214 | auto nc_elem = bounds.first + exp_elem; |
| 4215 | const char *qualified = index.symbol_name_at (nc_elem->idx); |
| 4216 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) |
| 4217 | return false; |
| 4218 | } |
| 4219 | |
| 4220 | return true; |
| 4221 | } |
| 4222 | |
| 4223 | /* Test the lower-level mapped_index::find_name_component_bounds |
| 4224 | method. */ |
| 4225 | |
| 4226 | static void |
| 4227 | test_mapped_index_find_name_component_bounds () |
| 4228 | { |
| 4229 | mock_mapped_index mock_index (test_symbols); |
| 4230 | |
| 4231 | mock_index.build_name_components (); |
| 4232 | |
| 4233 | /* Test the lower-level mapped_index::find_name_component_bounds |
| 4234 | method in completion mode. */ |
| 4235 | { |
| 4236 | static const char *expected_syms[] = { |
| 4237 | "t1_func", |
| 4238 | "t1_func1", |
| 4239 | }; |
| 4240 | |
| 4241 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 4242 | "t1_func", expected_syms)); |
| 4243 | } |
| 4244 | |
| 4245 | /* Check that the increment-last-char in the name matching algorithm |
| 4246 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ |
| 4247 | { |
| 4248 | static const char *expected_syms1[] = { |
| 4249 | "\377", |
| 4250 | "\377\377123", |
| 4251 | }; |
| 4252 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 4253 | "\377", expected_syms1)); |
| 4254 | |
| 4255 | static const char *expected_syms2[] = { |
| 4256 | "\377\377123", |
| 4257 | }; |
| 4258 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 4259 | "\377\377", expected_syms2)); |
| 4260 | } |
| 4261 | } |
| 4262 | |
| 4263 | /* Test dw2_expand_symtabs_matching_symbol. */ |
| 4264 | |
| 4265 | static void |
| 4266 | test_dw2_expand_symtabs_matching_symbol () |
| 4267 | { |
| 4268 | mock_mapped_index mock_index (test_symbols); |
| 4269 | |
| 4270 | /* We let all tests run until the end even if some fails, for debug |
| 4271 | convenience. */ |
| 4272 | bool any_mismatch = false; |
| 4273 | |
| 4274 | /* Create the expected symbols list (an initializer_list). Needed |
| 4275 | because lists have commas, and we need to pass them to CHECK, |
| 4276 | which is a macro. */ |
| 4277 | #define EXPECT(...) { __VA_ARGS__ } |
| 4278 | |
| 4279 | /* Wrapper for check_match that passes down the current |
| 4280 | __FILE__/__LINE__. */ |
| 4281 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ |
| 4282 | any_mismatch |= !check_match (__FILE__, __LINE__, \ |
| 4283 | mock_index, \ |
| 4284 | NAME, MATCH_TYPE, COMPLETION_MODE, \ |
| 4285 | EXPECTED_LIST) |
| 4286 | |
| 4287 | /* Identity checks. */ |
| 4288 | for (const char *sym : test_symbols) |
| 4289 | { |
| 4290 | /* Should be able to match all existing symbols. */ |
| 4291 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, |
| 4292 | EXPECT (sym)); |
| 4293 | |
| 4294 | /* Should be able to match all existing symbols with |
| 4295 | parameters. */ |
| 4296 | std::string with_params = std::string (sym) + "(int)"; |
| 4297 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 4298 | EXPECT (sym)); |
| 4299 | |
| 4300 | /* Should be able to match all existing symbols with |
| 4301 | parameters and qualifiers. */ |
| 4302 | with_params = std::string (sym) + " ( int ) const"; |
| 4303 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 4304 | EXPECT (sym)); |
| 4305 | |
| 4306 | /* This should really find sym, but cp-name-parser.y doesn't |
| 4307 | know about lvalue/rvalue qualifiers yet. */ |
| 4308 | with_params = std::string (sym) + " ( int ) &&"; |
| 4309 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 4310 | {}); |
| 4311 | } |
| 4312 | |
| 4313 | /* Check that the name matching algorithm for completion doesn't get |
| 4314 | confused with Latin1 'ÿ' / 0xff. */ |
| 4315 | { |
| 4316 | static const char str[] = "\377"; |
| 4317 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, |
| 4318 | EXPECT ("\377", "\377\377123")); |
| 4319 | } |
| 4320 | |
| 4321 | /* Check that the increment-last-char in the matching algorithm for |
| 4322 | completion doesn't match "t1_fund" when completing "t1_func". */ |
| 4323 | { |
| 4324 | static const char str[] = "t1_func"; |
| 4325 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, |
| 4326 | EXPECT ("t1_func", "t1_func1")); |
| 4327 | } |
| 4328 | |
| 4329 | /* Check that completion mode works at each prefix of the expected |
| 4330 | symbol name. */ |
| 4331 | { |
| 4332 | static const char str[] = "function(int)"; |
| 4333 | size_t len = strlen (str); |
| 4334 | std::string lookup; |
| 4335 | |
| 4336 | for (size_t i = 1; i < len; i++) |
| 4337 | { |
| 4338 | lookup.assign (str, i); |
| 4339 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, |
| 4340 | EXPECT ("function")); |
| 4341 | } |
| 4342 | } |
| 4343 | |
| 4344 | /* While "w" is a prefix of both components, the match function |
| 4345 | should still only be called once. */ |
| 4346 | { |
| 4347 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, |
| 4348 | EXPECT ("w1::w2")); |
| 4349 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
| 4350 | EXPECT ("w1::w2")); |
| 4351 | } |
| 4352 | |
| 4353 | /* Same, with a "complicated" symbol. */ |
| 4354 | { |
| 4355 | static const char str[] = Z_SYM_NAME; |
| 4356 | size_t len = strlen (str); |
| 4357 | std::string lookup; |
| 4358 | |
| 4359 | for (size_t i = 1; i < len; i++) |
| 4360 | { |
| 4361 | lookup.assign (str, i); |
| 4362 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, |
| 4363 | EXPECT (Z_SYM_NAME)); |
| 4364 | } |
| 4365 | } |
| 4366 | |
| 4367 | /* In FULL mode, an incomplete symbol doesn't match. */ |
| 4368 | { |
| 4369 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, |
| 4370 | {}); |
| 4371 | } |
| 4372 | |
| 4373 | /* A complete symbol with parameters matches any overload, since the |
| 4374 | index has no overload info. */ |
| 4375 | { |
| 4376 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, |
| 4377 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 4378 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
| 4379 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 4380 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, |
| 4381 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 4382 | } |
| 4383 | |
| 4384 | /* Check that whitespace is ignored appropriately. A symbol with a |
| 4385 | template argument list. */ |
| 4386 | { |
| 4387 | static const char expected[] = "ns::foo<int>"; |
| 4388 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, |
| 4389 | EXPECT (expected)); |
| 4390 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
| 4391 | EXPECT (expected)); |
| 4392 | } |
| 4393 | |
| 4394 | /* Check that whitespace is ignored appropriately. A symbol with a |
| 4395 | template argument list that includes a pointer. */ |
| 4396 | { |
| 4397 | static const char expected[] = "ns::foo<char*>"; |
| 4398 | /* Try both completion and non-completion modes. */ |
| 4399 | static const bool completion_mode[2] = {false, true}; |
| 4400 | for (size_t i = 0; i < 2; i++) |
| 4401 | { |
| 4402 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, |
| 4403 | completion_mode[i], EXPECT (expected)); |
| 4404 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
| 4405 | completion_mode[i], EXPECT (expected)); |
| 4406 | |
| 4407 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, |
| 4408 | completion_mode[i], EXPECT (expected)); |
| 4409 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
| 4410 | completion_mode[i], EXPECT (expected)); |
| 4411 | } |
| 4412 | } |
| 4413 | |
| 4414 | { |
| 4415 | /* Check method qualifiers are ignored. */ |
| 4416 | static const char expected[] = "ns::foo<char*>"; |
| 4417 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", |
| 4418 | symbol_name_match_type::FULL, true, EXPECT (expected)); |
| 4419 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", |
| 4420 | symbol_name_match_type::FULL, true, EXPECT (expected)); |
| 4421 | CHECK_MATCH ("foo < char * > ( int ) const", |
| 4422 | symbol_name_match_type::WILD, true, EXPECT (expected)); |
| 4423 | CHECK_MATCH ("foo < char * > ( int ) &&", |
| 4424 | symbol_name_match_type::WILD, true, EXPECT (expected)); |
| 4425 | } |
| 4426 | |
| 4427 | /* Test lookup names that don't match anything. */ |
| 4428 | { |
| 4429 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
| 4430 | {}); |
| 4431 | |
| 4432 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
| 4433 | {}); |
| 4434 | } |
| 4435 | |
| 4436 | /* Some wild matching tests, exercising "(anonymous namespace)", |
| 4437 | which should not be confused with a parameter list. */ |
| 4438 | { |
| 4439 | static const char *syms[] = { |
| 4440 | "A::B::C", |
| 4441 | "B::C", |
| 4442 | "C", |
| 4443 | "A :: B :: C ( int )", |
| 4444 | "B :: C ( int )", |
| 4445 | "C ( int )", |
| 4446 | }; |
| 4447 | |
| 4448 | for (const char *s : syms) |
| 4449 | { |
| 4450 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, |
| 4451 | EXPECT ("(anonymous namespace)::A::B::C")); |
| 4452 | } |
| 4453 | } |
| 4454 | |
| 4455 | { |
| 4456 | static const char expected[] = "ns2::tmpl<int>::foo2"; |
| 4457 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, |
| 4458 | EXPECT (expected)); |
| 4459 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, |
| 4460 | EXPECT (expected)); |
| 4461 | } |
| 4462 | |
| 4463 | SELF_CHECK (!any_mismatch); |
| 4464 | |
| 4465 | #undef EXPECT |
| 4466 | #undef CHECK_MATCH |
| 4467 | } |
| 4468 | |
| 4469 | static void |
| 4470 | run_test () |
| 4471 | { |
| 4472 | test_mapped_index_find_name_component_bounds (); |
| 4473 | test_dw2_expand_symtabs_matching_symbol (); |
| 4474 | } |
| 4475 | |
| 4476 | }} // namespace selftests::dw2_expand_symtabs_matching |
| 4477 | |
| 4478 | #endif /* GDB_SELF_TEST */ |
| 4479 | |
| 4480 | /* If FILE_MATCHER is NULL or if PER_CU has |
| 4481 | dwarf2_per_cu_quick_data::MARK set (see |
| 4482 | dw_expand_symtabs_matching_file_matcher), expand the CU and call |
| 4483 | EXPANSION_NOTIFY on it. */ |
| 4484 | |
| 4485 | static void |
| 4486 | dw2_expand_symtabs_matching_one |
| 4487 | (struct dwarf2_per_cu_data *per_cu, |
| 4488 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 4489 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) |
| 4490 | { |
| 4491 | if (file_matcher == NULL || per_cu->v.quick->mark) |
| 4492 | { |
| 4493 | bool symtab_was_null |
| 4494 | = (per_cu->v.quick->compunit_symtab == NULL); |
| 4495 | |
| 4496 | dw2_instantiate_symtab (per_cu, false); |
| 4497 | |
| 4498 | if (expansion_notify != NULL |
| 4499 | && symtab_was_null |
| 4500 | && per_cu->v.quick->compunit_symtab != NULL) |
| 4501 | expansion_notify (per_cu->v.quick->compunit_symtab); |
| 4502 | } |
| 4503 | } |
| 4504 | |
| 4505 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
| 4506 | matched, to expand corresponding CUs that were marked. IDX is the |
| 4507 | index of the symbol name that matched. */ |
| 4508 | |
| 4509 | static void |
| 4510 | dw2_expand_marked_cus |
| 4511 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
| 4512 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 4513 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 4514 | search_domain kind) |
| 4515 | { |
| 4516 | offset_type *vec, vec_len, vec_idx; |
| 4517 | bool global_seen = false; |
| 4518 | mapped_index &index = *dwarf2_per_objfile->index_table; |
| 4519 | |
| 4520 | vec = (offset_type *) (index.constant_pool |
| 4521 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
| 4522 | vec_len = MAYBE_SWAP (vec[0]); |
| 4523 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) |
| 4524 | { |
| 4525 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
| 4526 | /* This value is only valid for index versions >= 7. */ |
| 4527 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
| 4528 | gdb_index_symbol_kind symbol_kind = |
| 4529 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); |
| 4530 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
| 4531 | /* Only check the symbol attributes if they're present. |
| 4532 | Indices prior to version 7 don't record them, |
| 4533 | and indices >= 7 may elide them for certain symbols |
| 4534 | (gold does this). */ |
| 4535 | int attrs_valid = |
| 4536 | (index.version >= 7 |
| 4537 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
| 4538 | |
| 4539 | /* Work around gold/15646. */ |
| 4540 | if (attrs_valid) |
| 4541 | { |
| 4542 | if (!is_static && global_seen) |
| 4543 | continue; |
| 4544 | if (!is_static) |
| 4545 | global_seen = true; |
| 4546 | } |
| 4547 | |
| 4548 | /* Only check the symbol's kind if it has one. */ |
| 4549 | if (attrs_valid) |
| 4550 | { |
| 4551 | switch (kind) |
| 4552 | { |
| 4553 | case VARIABLES_DOMAIN: |
| 4554 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) |
| 4555 | continue; |
| 4556 | break; |
| 4557 | case FUNCTIONS_DOMAIN: |
| 4558 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) |
| 4559 | continue; |
| 4560 | break; |
| 4561 | case TYPES_DOMAIN: |
| 4562 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 4563 | continue; |
| 4564 | break; |
| 4565 | case MODULES_DOMAIN: |
| 4566 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) |
| 4567 | continue; |
| 4568 | break; |
| 4569 | default: |
| 4570 | break; |
| 4571 | } |
| 4572 | } |
| 4573 | |
| 4574 | /* Don't crash on bad data. */ |
| 4575 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
| 4576 | + dwarf2_per_objfile->all_type_units.size ())) |
| 4577 | { |
| 4578 | complaint (_(".gdb_index entry has bad CU index" |
| 4579 | " [in module %s]"), |
| 4580 | objfile_name (dwarf2_per_objfile->objfile)); |
| 4581 | continue; |
| 4582 | } |
| 4583 | |
| 4584 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
| 4585 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 4586 | expansion_notify); |
| 4587 | } |
| 4588 | } |
| 4589 | |
| 4590 | /* If FILE_MATCHER is non-NULL, set all the |
| 4591 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE |
| 4592 | that match FILE_MATCHER. */ |
| 4593 | |
| 4594 | static void |
| 4595 | dw_expand_symtabs_matching_file_matcher |
| 4596 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 4597 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) |
| 4598 | { |
| 4599 | if (file_matcher == NULL) |
| 4600 | return; |
| 4601 | |
| 4602 | objfile *const objfile = dwarf2_per_objfile->objfile; |
| 4603 | |
| 4604 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
| 4605 | htab_eq_pointer, |
| 4606 | NULL, xcalloc, xfree)); |
| 4607 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, |
| 4608 | htab_eq_pointer, |
| 4609 | NULL, xcalloc, xfree)); |
| 4610 | |
| 4611 | /* The rule is CUs specify all the files, including those used by |
| 4612 | any TU, so there's no need to scan TUs here. */ |
| 4613 | |
| 4614 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 4615 | { |
| 4616 | QUIT; |
| 4617 | |
| 4618 | per_cu->v.quick->mark = 0; |
| 4619 | |
| 4620 | /* We only need to look at symtabs not already expanded. */ |
| 4621 | if (per_cu->v.quick->compunit_symtab) |
| 4622 | continue; |
| 4623 | |
| 4624 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
| 4625 | if (file_data == NULL) |
| 4626 | continue; |
| 4627 | |
| 4628 | if (htab_find (visited_not_found.get (), file_data) != NULL) |
| 4629 | continue; |
| 4630 | else if (htab_find (visited_found.get (), file_data) != NULL) |
| 4631 | { |
| 4632 | per_cu->v.quick->mark = 1; |
| 4633 | continue; |
| 4634 | } |
| 4635 | |
| 4636 | for (int j = 0; j < file_data->num_file_names; ++j) |
| 4637 | { |
| 4638 | const char *this_real_name; |
| 4639 | |
| 4640 | if (file_matcher (file_data->file_names[j], false)) |
| 4641 | { |
| 4642 | per_cu->v.quick->mark = 1; |
| 4643 | break; |
| 4644 | } |
| 4645 | |
| 4646 | /* Before we invoke realpath, which can get expensive when many |
| 4647 | files are involved, do a quick comparison of the basenames. */ |
| 4648 | if (!basenames_may_differ |
| 4649 | && !file_matcher (lbasename (file_data->file_names[j]), |
| 4650 | true)) |
| 4651 | continue; |
| 4652 | |
| 4653 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
| 4654 | if (file_matcher (this_real_name, false)) |
| 4655 | { |
| 4656 | per_cu->v.quick->mark = 1; |
| 4657 | break; |
| 4658 | } |
| 4659 | } |
| 4660 | |
| 4661 | void **slot = htab_find_slot (per_cu->v.quick->mark |
| 4662 | ? visited_found.get () |
| 4663 | : visited_not_found.get (), |
| 4664 | file_data, INSERT); |
| 4665 | *slot = file_data; |
| 4666 | } |
| 4667 | } |
| 4668 | |
| 4669 | static void |
| 4670 | dw2_expand_symtabs_matching |
| 4671 | (struct objfile *objfile, |
| 4672 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 4673 | const lookup_name_info *lookup_name, |
| 4674 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 4675 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 4676 | enum search_domain kind) |
| 4677 | { |
| 4678 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4679 | = get_dwarf2_per_objfile (objfile); |
| 4680 | |
| 4681 | /* index_table is NULL if OBJF_READNOW. */ |
| 4682 | if (!dwarf2_per_objfile->index_table) |
| 4683 | return; |
| 4684 | |
| 4685 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
| 4686 | |
| 4687 | if (symbol_matcher == NULL && lookup_name == NULL) |
| 4688 | { |
| 4689 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 4690 | { |
| 4691 | QUIT; |
| 4692 | |
| 4693 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 4694 | expansion_notify); |
| 4695 | } |
| 4696 | return; |
| 4697 | } |
| 4698 | |
| 4699 | mapped_index &index = *dwarf2_per_objfile->index_table; |
| 4700 | |
| 4701 | dw2_expand_symtabs_matching_symbol (index, *lookup_name, |
| 4702 | symbol_matcher, |
| 4703 | kind, [&] (offset_type idx) |
| 4704 | { |
| 4705 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
| 4706 | expansion_notify, kind); |
| 4707 | return true; |
| 4708 | }); |
| 4709 | } |
| 4710 | |
| 4711 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
| 4712 | symtab. */ |
| 4713 | |
| 4714 | static struct compunit_symtab * |
| 4715 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, |
| 4716 | CORE_ADDR pc) |
| 4717 | { |
| 4718 | int i; |
| 4719 | |
| 4720 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
| 4721 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) |
| 4722 | return cust; |
| 4723 | |
| 4724 | if (cust->includes == NULL) |
| 4725 | return NULL; |
| 4726 | |
| 4727 | for (i = 0; cust->includes[i]; ++i) |
| 4728 | { |
| 4729 | struct compunit_symtab *s = cust->includes[i]; |
| 4730 | |
| 4731 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
| 4732 | if (s != NULL) |
| 4733 | return s; |
| 4734 | } |
| 4735 | |
| 4736 | return NULL; |
| 4737 | } |
| 4738 | |
| 4739 | static struct compunit_symtab * |
| 4740 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, |
| 4741 | struct bound_minimal_symbol msymbol, |
| 4742 | CORE_ADDR pc, |
| 4743 | struct obj_section *section, |
| 4744 | int warn_if_readin) |
| 4745 | { |
| 4746 | struct dwarf2_per_cu_data *data; |
| 4747 | struct compunit_symtab *result; |
| 4748 | |
| 4749 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
| 4750 | return NULL; |
| 4751 | |
| 4752 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
| 4753 | data = (struct dwarf2_per_cu_data *) addrmap_find |
| 4754 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); |
| 4755 | if (!data) |
| 4756 | return NULL; |
| 4757 | |
| 4758 | if (warn_if_readin && data->v.quick->compunit_symtab) |
| 4759 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
| 4760 | paddress (objfile->arch (), pc)); |
| 4761 | |
| 4762 | result |
| 4763 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
| 4764 | false), |
| 4765 | pc); |
| 4766 | gdb_assert (result != NULL); |
| 4767 | return result; |
| 4768 | } |
| 4769 | |
| 4770 | static void |
| 4771 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
| 4772 | void *data, int need_fullname) |
| 4773 | { |
| 4774 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4775 | = get_dwarf2_per_objfile (objfile); |
| 4776 | |
| 4777 | if (!dwarf2_per_objfile->filenames_cache) |
| 4778 | { |
| 4779 | dwarf2_per_objfile->filenames_cache.emplace (); |
| 4780 | |
| 4781 | htab_up visited (htab_create_alloc (10, |
| 4782 | htab_hash_pointer, htab_eq_pointer, |
| 4783 | NULL, xcalloc, xfree)); |
| 4784 | |
| 4785 | /* The rule is CUs specify all the files, including those used |
| 4786 | by any TU, so there's no need to scan TUs here. We can |
| 4787 | ignore file names coming from already-expanded CUs. */ |
| 4788 | |
| 4789 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 4790 | { |
| 4791 | if (per_cu->v.quick->compunit_symtab) |
| 4792 | { |
| 4793 | void **slot = htab_find_slot (visited.get (), |
| 4794 | per_cu->v.quick->file_names, |
| 4795 | INSERT); |
| 4796 | |
| 4797 | *slot = per_cu->v.quick->file_names; |
| 4798 | } |
| 4799 | } |
| 4800 | |
| 4801 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 4802 | { |
| 4803 | /* We only need to look at symtabs not already expanded. */ |
| 4804 | if (per_cu->v.quick->compunit_symtab) |
| 4805 | continue; |
| 4806 | |
| 4807 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
| 4808 | if (file_data == NULL) |
| 4809 | continue; |
| 4810 | |
| 4811 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
| 4812 | if (*slot) |
| 4813 | { |
| 4814 | /* Already visited. */ |
| 4815 | continue; |
| 4816 | } |
| 4817 | *slot = file_data; |
| 4818 | |
| 4819 | for (int j = 0; j < file_data->num_file_names; ++j) |
| 4820 | { |
| 4821 | const char *filename = file_data->file_names[j]; |
| 4822 | dwarf2_per_objfile->filenames_cache->seen (filename); |
| 4823 | } |
| 4824 | } |
| 4825 | } |
| 4826 | |
| 4827 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) |
| 4828 | { |
| 4829 | gdb::unique_xmalloc_ptr<char> this_real_name; |
| 4830 | |
| 4831 | if (need_fullname) |
| 4832 | this_real_name = gdb_realpath (filename); |
| 4833 | (*fun) (filename, this_real_name.get (), data); |
| 4834 | }); |
| 4835 | } |
| 4836 | |
| 4837 | static int |
| 4838 | dw2_has_symbols (struct objfile *objfile) |
| 4839 | { |
| 4840 | return 1; |
| 4841 | } |
| 4842 | |
| 4843 | const struct quick_symbol_functions dwarf2_gdb_index_functions = |
| 4844 | { |
| 4845 | dw2_has_symbols, |
| 4846 | dw2_find_last_source_symtab, |
| 4847 | dw2_forget_cached_source_info, |
| 4848 | dw2_map_symtabs_matching_filename, |
| 4849 | dw2_lookup_symbol, |
| 4850 | NULL, |
| 4851 | dw2_print_stats, |
| 4852 | dw2_dump, |
| 4853 | dw2_expand_symtabs_for_function, |
| 4854 | dw2_expand_all_symtabs, |
| 4855 | dw2_expand_symtabs_with_fullname, |
| 4856 | dw2_map_matching_symbols, |
| 4857 | dw2_expand_symtabs_matching, |
| 4858 | dw2_find_pc_sect_compunit_symtab, |
| 4859 | NULL, |
| 4860 | dw2_map_symbol_filenames |
| 4861 | }; |
| 4862 | |
| 4863 | /* DWARF-5 debug_names reader. */ |
| 4864 | |
| 4865 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ |
| 4866 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; |
| 4867 | |
| 4868 | /* A helper function that reads the .debug_names section in SECTION |
| 4869 | and fills in MAP. FILENAME is the name of the file containing the |
| 4870 | section; it is used for error reporting. |
| 4871 | |
| 4872 | Returns true if all went well, false otherwise. */ |
| 4873 | |
| 4874 | static bool |
| 4875 | read_debug_names_from_section (struct objfile *objfile, |
| 4876 | const char *filename, |
| 4877 | struct dwarf2_section_info *section, |
| 4878 | mapped_debug_names &map) |
| 4879 | { |
| 4880 | if (section->empty ()) |
| 4881 | return false; |
| 4882 | |
| 4883 | /* Older elfutils strip versions could keep the section in the main |
| 4884 | executable while splitting it for the separate debug info file. */ |
| 4885 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
| 4886 | return false; |
| 4887 | |
| 4888 | section->read (objfile); |
| 4889 | |
| 4890 | map.dwarf5_byte_order = gdbarch_byte_order (objfile->arch ()); |
| 4891 | |
| 4892 | const gdb_byte *addr = section->buffer; |
| 4893 | |
| 4894 | bfd *const abfd = section->get_bfd_owner (); |
| 4895 | |
| 4896 | unsigned int bytes_read; |
| 4897 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); |
| 4898 | addr += bytes_read; |
| 4899 | |
| 4900 | map.dwarf5_is_dwarf64 = bytes_read != 4; |
| 4901 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; |
| 4902 | if (bytes_read + length != section->size) |
| 4903 | { |
| 4904 | /* There may be multiple per-CU indices. */ |
| 4905 | warning (_("Section .debug_names in %s length %s does not match " |
| 4906 | "section length %s, ignoring .debug_names."), |
| 4907 | filename, plongest (bytes_read + length), |
| 4908 | pulongest (section->size)); |
| 4909 | return false; |
| 4910 | } |
| 4911 | |
| 4912 | /* The version number. */ |
| 4913 | uint16_t version = read_2_bytes (abfd, addr); |
| 4914 | addr += 2; |
| 4915 | if (version != 5) |
| 4916 | { |
| 4917 | warning (_("Section .debug_names in %s has unsupported version %d, " |
| 4918 | "ignoring .debug_names."), |
| 4919 | filename, version); |
| 4920 | return false; |
| 4921 | } |
| 4922 | |
| 4923 | /* Padding. */ |
| 4924 | uint16_t padding = read_2_bytes (abfd, addr); |
| 4925 | addr += 2; |
| 4926 | if (padding != 0) |
| 4927 | { |
| 4928 | warning (_("Section .debug_names in %s has unsupported padding %d, " |
| 4929 | "ignoring .debug_names."), |
| 4930 | filename, padding); |
| 4931 | return false; |
| 4932 | } |
| 4933 | |
| 4934 | /* comp_unit_count - The number of CUs in the CU list. */ |
| 4935 | map.cu_count = read_4_bytes (abfd, addr); |
| 4936 | addr += 4; |
| 4937 | |
| 4938 | /* local_type_unit_count - The number of TUs in the local TU |
| 4939 | list. */ |
| 4940 | map.tu_count = read_4_bytes (abfd, addr); |
| 4941 | addr += 4; |
| 4942 | |
| 4943 | /* foreign_type_unit_count - The number of TUs in the foreign TU |
| 4944 | list. */ |
| 4945 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); |
| 4946 | addr += 4; |
| 4947 | if (foreign_tu_count != 0) |
| 4948 | { |
| 4949 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " |
| 4950 | "ignoring .debug_names."), |
| 4951 | filename, static_cast<unsigned long> (foreign_tu_count)); |
| 4952 | return false; |
| 4953 | } |
| 4954 | |
| 4955 | /* bucket_count - The number of hash buckets in the hash lookup |
| 4956 | table. */ |
| 4957 | map.bucket_count = read_4_bytes (abfd, addr); |
| 4958 | addr += 4; |
| 4959 | |
| 4960 | /* name_count - The number of unique names in the index. */ |
| 4961 | map.name_count = read_4_bytes (abfd, addr); |
| 4962 | addr += 4; |
| 4963 | |
| 4964 | /* abbrev_table_size - The size in bytes of the abbreviations |
| 4965 | table. */ |
| 4966 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); |
| 4967 | addr += 4; |
| 4968 | |
| 4969 | /* augmentation_string_size - The size in bytes of the augmentation |
| 4970 | string. This value is rounded up to a multiple of 4. */ |
| 4971 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); |
| 4972 | addr += 4; |
| 4973 | map.augmentation_is_gdb = ((augmentation_string_size |
| 4974 | == sizeof (dwarf5_augmentation)) |
| 4975 | && memcmp (addr, dwarf5_augmentation, |
| 4976 | sizeof (dwarf5_augmentation)) == 0); |
| 4977 | augmentation_string_size += (-augmentation_string_size) & 3; |
| 4978 | addr += augmentation_string_size; |
| 4979 | |
| 4980 | /* List of CUs */ |
| 4981 | map.cu_table_reordered = addr; |
| 4982 | addr += map.cu_count * map.offset_size; |
| 4983 | |
| 4984 | /* List of Local TUs */ |
| 4985 | map.tu_table_reordered = addr; |
| 4986 | addr += map.tu_count * map.offset_size; |
| 4987 | |
| 4988 | /* Hash Lookup Table */ |
| 4989 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); |
| 4990 | addr += map.bucket_count * 4; |
| 4991 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); |
| 4992 | addr += map.name_count * 4; |
| 4993 | |
| 4994 | /* Name Table */ |
| 4995 | map.name_table_string_offs_reordered = addr; |
| 4996 | addr += map.name_count * map.offset_size; |
| 4997 | map.name_table_entry_offs_reordered = addr; |
| 4998 | addr += map.name_count * map.offset_size; |
| 4999 | |
| 5000 | const gdb_byte *abbrev_table_start = addr; |
| 5001 | for (;;) |
| 5002 | { |
| 5003 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5004 | addr += bytes_read; |
| 5005 | if (index_num == 0) |
| 5006 | break; |
| 5007 | |
| 5008 | const auto insertpair |
| 5009 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); |
| 5010 | if (!insertpair.second) |
| 5011 | { |
| 5012 | warning (_("Section .debug_names in %s has duplicate index %s, " |
| 5013 | "ignoring .debug_names."), |
| 5014 | filename, pulongest (index_num)); |
| 5015 | return false; |
| 5016 | } |
| 5017 | mapped_debug_names::index_val &indexval = insertpair.first->second; |
| 5018 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5019 | addr += bytes_read; |
| 5020 | |
| 5021 | for (;;) |
| 5022 | { |
| 5023 | mapped_debug_names::index_val::attr attr; |
| 5024 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5025 | addr += bytes_read; |
| 5026 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5027 | addr += bytes_read; |
| 5028 | if (attr.form == DW_FORM_implicit_const) |
| 5029 | { |
| 5030 | attr.implicit_const = read_signed_leb128 (abfd, addr, |
| 5031 | &bytes_read); |
| 5032 | addr += bytes_read; |
| 5033 | } |
| 5034 | if (attr.dw_idx == 0 && attr.form == 0) |
| 5035 | break; |
| 5036 | indexval.attr_vec.push_back (std::move (attr)); |
| 5037 | } |
| 5038 | } |
| 5039 | if (addr != abbrev_table_start + abbrev_table_size) |
| 5040 | { |
| 5041 | warning (_("Section .debug_names in %s has abbreviation_table " |
| 5042 | "of size %s vs. written as %u, ignoring .debug_names."), |
| 5043 | filename, plongest (addr - abbrev_table_start), |
| 5044 | abbrev_table_size); |
| 5045 | return false; |
| 5046 | } |
| 5047 | map.entry_pool = addr; |
| 5048 | |
| 5049 | return true; |
| 5050 | } |
| 5051 | |
| 5052 | /* A helper for create_cus_from_debug_names that handles the MAP's CU |
| 5053 | list. */ |
| 5054 | |
| 5055 | static void |
| 5056 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5057 | const mapped_debug_names &map, |
| 5058 | dwarf2_section_info §ion, |
| 5059 | bool is_dwz) |
| 5060 | { |
| 5061 | if (!map.augmentation_is_gdb) |
| 5062 | { |
| 5063 | for (uint32_t i = 0; i < map.cu_count; ++i) |
| 5064 | { |
| 5065 | sect_offset sect_off |
| 5066 | = (sect_offset) (extract_unsigned_integer |
| 5067 | (map.cu_table_reordered + i * map.offset_size, |
| 5068 | map.offset_size, |
| 5069 | map.dwarf5_byte_order)); |
| 5070 | /* We don't know the length of the CU, because the CU list in a |
| 5071 | .debug_names index can be incomplete, so we can't use the start of |
| 5072 | the next CU as end of this CU. We create the CUs here with length 0, |
| 5073 | and in cutu_reader::cutu_reader we'll fill in the actual length. */ |
| 5074 | dwarf2_per_cu_data *per_cu |
| 5075 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
| 5076 | sect_off, 0); |
| 5077 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
| 5078 | } |
| 5079 | } |
| 5080 | |
| 5081 | sect_offset sect_off_prev; |
| 5082 | for (uint32_t i = 0; i <= map.cu_count; ++i) |
| 5083 | { |
| 5084 | sect_offset sect_off_next; |
| 5085 | if (i < map.cu_count) |
| 5086 | { |
| 5087 | sect_off_next |
| 5088 | = (sect_offset) (extract_unsigned_integer |
| 5089 | (map.cu_table_reordered + i * map.offset_size, |
| 5090 | map.offset_size, |
| 5091 | map.dwarf5_byte_order)); |
| 5092 | } |
| 5093 | else |
| 5094 | sect_off_next = (sect_offset) section.size; |
| 5095 | if (i >= 1) |
| 5096 | { |
| 5097 | const ULONGEST length = sect_off_next - sect_off_prev; |
| 5098 | dwarf2_per_cu_data *per_cu |
| 5099 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
| 5100 | sect_off_prev, length); |
| 5101 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
| 5102 | } |
| 5103 | sect_off_prev = sect_off_next; |
| 5104 | } |
| 5105 | } |
| 5106 | |
| 5107 | /* Read the CU list from the mapped index, and use it to create all |
| 5108 | the CU objects for this dwarf2_per_objfile. */ |
| 5109 | |
| 5110 | static void |
| 5111 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5112 | const mapped_debug_names &map, |
| 5113 | const mapped_debug_names &dwz_map) |
| 5114 | { |
| 5115 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
| 5116 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); |
| 5117 | |
| 5118 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
| 5119 | dwarf2_per_objfile->info, |
| 5120 | false /* is_dwz */); |
| 5121 | |
| 5122 | if (dwz_map.cu_count == 0) |
| 5123 | return; |
| 5124 | |
| 5125 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 5126 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, |
| 5127 | true /* is_dwz */); |
| 5128 | } |
| 5129 | |
| 5130 | /* Read .debug_names. If everything went ok, initialize the "quick" |
| 5131 | elements of all the CUs and return true. Otherwise, return false. */ |
| 5132 | |
| 5133 | static bool |
| 5134 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 5135 | { |
| 5136 | std::unique_ptr<mapped_debug_names> map |
| 5137 | (new mapped_debug_names (dwarf2_per_objfile)); |
| 5138 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
| 5139 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 5140 | |
| 5141 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), |
| 5142 | &dwarf2_per_objfile->debug_names, |
| 5143 | *map)) |
| 5144 | return false; |
| 5145 | |
| 5146 | /* Don't use the index if it's empty. */ |
| 5147 | if (map->name_count == 0) |
| 5148 | return false; |
| 5149 | |
| 5150 | /* If there is a .dwz file, read it so we can get its CU list as |
| 5151 | well. */ |
| 5152 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 5153 | if (dwz != NULL) |
| 5154 | { |
| 5155 | if (!read_debug_names_from_section (objfile, |
| 5156 | bfd_get_filename (dwz->dwz_bfd.get ()), |
| 5157 | &dwz->debug_names, dwz_map)) |
| 5158 | { |
| 5159 | warning (_("could not read '.debug_names' section from %s; skipping"), |
| 5160 | bfd_get_filename (dwz->dwz_bfd.get ())); |
| 5161 | return false; |
| 5162 | } |
| 5163 | } |
| 5164 | |
| 5165 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
| 5166 | |
| 5167 | if (map->tu_count != 0) |
| 5168 | { |
| 5169 | /* We can only handle a single .debug_types when we have an |
| 5170 | index. */ |
| 5171 | if (dwarf2_per_objfile->types.size () != 1) |
| 5172 | return false; |
| 5173 | |
| 5174 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
| 5175 | |
| 5176 | create_signatured_type_table_from_debug_names |
| 5177 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
| 5178 | } |
| 5179 | |
| 5180 | create_addrmap_from_aranges (dwarf2_per_objfile, |
| 5181 | &dwarf2_per_objfile->debug_aranges); |
| 5182 | |
| 5183 | dwarf2_per_objfile->debug_names_table = std::move (map); |
| 5184 | dwarf2_per_objfile->using_index = 1; |
| 5185 | dwarf2_per_objfile->quick_file_names_table = |
| 5186 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
| 5187 | |
| 5188 | return true; |
| 5189 | } |
| 5190 | |
| 5191 | /* Type used to manage iterating over all CUs looking for a symbol for |
| 5192 | .debug_names. */ |
| 5193 | |
| 5194 | class dw2_debug_names_iterator |
| 5195 | { |
| 5196 | public: |
| 5197 | dw2_debug_names_iterator (const mapped_debug_names &map, |
| 5198 | gdb::optional<block_enum> block_index, |
| 5199 | domain_enum domain, |
| 5200 | const char *name) |
| 5201 | : m_map (map), m_block_index (block_index), m_domain (domain), |
| 5202 | m_addr (find_vec_in_debug_names (map, name)) |
| 5203 | {} |
| 5204 | |
| 5205 | dw2_debug_names_iterator (const mapped_debug_names &map, |
| 5206 | search_domain search, uint32_t namei) |
| 5207 | : m_map (map), |
| 5208 | m_search (search), |
| 5209 | m_addr (find_vec_in_debug_names (map, namei)) |
| 5210 | {} |
| 5211 | |
| 5212 | dw2_debug_names_iterator (const mapped_debug_names &map, |
| 5213 | block_enum block_index, domain_enum domain, |
| 5214 | uint32_t namei) |
| 5215 | : m_map (map), m_block_index (block_index), m_domain (domain), |
| 5216 | m_addr (find_vec_in_debug_names (map, namei)) |
| 5217 | {} |
| 5218 | |
| 5219 | /* Return the next matching CU or NULL if there are no more. */ |
| 5220 | dwarf2_per_cu_data *next (); |
| 5221 | |
| 5222 | private: |
| 5223 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
| 5224 | const char *name); |
| 5225 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
| 5226 | uint32_t namei); |
| 5227 | |
| 5228 | /* The internalized form of .debug_names. */ |
| 5229 | const mapped_debug_names &m_map; |
| 5230 | |
| 5231 | /* If set, only look for symbols that match that block. Valid values are |
| 5232 | GLOBAL_BLOCK and STATIC_BLOCK. */ |
| 5233 | const gdb::optional<block_enum> m_block_index; |
| 5234 | |
| 5235 | /* The kind of symbol we're looking for. */ |
| 5236 | const domain_enum m_domain = UNDEF_DOMAIN; |
| 5237 | const search_domain m_search = ALL_DOMAIN; |
| 5238 | |
| 5239 | /* The list of CUs from the index entry of the symbol, or NULL if |
| 5240 | not found. */ |
| 5241 | const gdb_byte *m_addr; |
| 5242 | }; |
| 5243 | |
| 5244 | const char * |
| 5245 | mapped_debug_names::namei_to_name (uint32_t namei) const |
| 5246 | { |
| 5247 | const ULONGEST namei_string_offs |
| 5248 | = extract_unsigned_integer ((name_table_string_offs_reordered |
| 5249 | + namei * offset_size), |
| 5250 | offset_size, |
| 5251 | dwarf5_byte_order); |
| 5252 | return read_indirect_string_at_offset (dwarf2_per_objfile, |
| 5253 | namei_string_offs); |
| 5254 | } |
| 5255 | |
| 5256 | /* Find a slot in .debug_names for the object named NAME. If NAME is |
| 5257 | found, return pointer to its pool data. If NAME cannot be found, |
| 5258 | return NULL. */ |
| 5259 | |
| 5260 | const gdb_byte * |
| 5261 | dw2_debug_names_iterator::find_vec_in_debug_names |
| 5262 | (const mapped_debug_names &map, const char *name) |
| 5263 | { |
| 5264 | int (*cmp) (const char *, const char *); |
| 5265 | |
| 5266 | gdb::unique_xmalloc_ptr<char> without_params; |
| 5267 | if (current_language->la_language == language_cplus |
| 5268 | || current_language->la_language == language_fortran |
| 5269 | || current_language->la_language == language_d) |
| 5270 | { |
| 5271 | /* NAME is already canonical. Drop any qualifiers as |
| 5272 | .debug_names does not contain any. */ |
| 5273 | |
| 5274 | if (strchr (name, '(') != NULL) |
| 5275 | { |
| 5276 | without_params = cp_remove_params (name); |
| 5277 | if (without_params != NULL) |
| 5278 | name = without_params.get (); |
| 5279 | } |
| 5280 | } |
| 5281 | |
| 5282 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
| 5283 | |
| 5284 | const uint32_t full_hash = dwarf5_djb_hash (name); |
| 5285 | uint32_t namei |
| 5286 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> |
| 5287 | (map.bucket_table_reordered |
| 5288 | + (full_hash % map.bucket_count)), 4, |
| 5289 | map.dwarf5_byte_order); |
| 5290 | if (namei == 0) |
| 5291 | return NULL; |
| 5292 | --namei; |
| 5293 | if (namei >= map.name_count) |
| 5294 | { |
| 5295 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
| 5296 | "[in module %s]"), |
| 5297 | namei, map.name_count, |
| 5298 | objfile_name (map.dwarf2_per_objfile->objfile)); |
| 5299 | return NULL; |
| 5300 | } |
| 5301 | |
| 5302 | for (;;) |
| 5303 | { |
| 5304 | const uint32_t namei_full_hash |
| 5305 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> |
| 5306 | (map.hash_table_reordered + namei), 4, |
| 5307 | map.dwarf5_byte_order); |
| 5308 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) |
| 5309 | return NULL; |
| 5310 | |
| 5311 | if (full_hash == namei_full_hash) |
| 5312 | { |
| 5313 | const char *const namei_string = map.namei_to_name (namei); |
| 5314 | |
| 5315 | #if 0 /* An expensive sanity check. */ |
| 5316 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) |
| 5317 | { |
| 5318 | complaint (_("Wrong .debug_names hash for string at index %u " |
| 5319 | "[in module %s]"), |
| 5320 | namei, objfile_name (dwarf2_per_objfile->objfile)); |
| 5321 | return NULL; |
| 5322 | } |
| 5323 | #endif |
| 5324 | |
| 5325 | if (cmp (namei_string, name) == 0) |
| 5326 | { |
| 5327 | const ULONGEST namei_entry_offs |
| 5328 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered |
| 5329 | + namei * map.offset_size), |
| 5330 | map.offset_size, map.dwarf5_byte_order); |
| 5331 | return map.entry_pool + namei_entry_offs; |
| 5332 | } |
| 5333 | } |
| 5334 | |
| 5335 | ++namei; |
| 5336 | if (namei >= map.name_count) |
| 5337 | return NULL; |
| 5338 | } |
| 5339 | } |
| 5340 | |
| 5341 | const gdb_byte * |
| 5342 | dw2_debug_names_iterator::find_vec_in_debug_names |
| 5343 | (const mapped_debug_names &map, uint32_t namei) |
| 5344 | { |
| 5345 | if (namei >= map.name_count) |
| 5346 | { |
| 5347 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
| 5348 | "[in module %s]"), |
| 5349 | namei, map.name_count, |
| 5350 | objfile_name (map.dwarf2_per_objfile->objfile)); |
| 5351 | return NULL; |
| 5352 | } |
| 5353 | |
| 5354 | const ULONGEST namei_entry_offs |
| 5355 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered |
| 5356 | + namei * map.offset_size), |
| 5357 | map.offset_size, map.dwarf5_byte_order); |
| 5358 | return map.entry_pool + namei_entry_offs; |
| 5359 | } |
| 5360 | |
| 5361 | /* See dw2_debug_names_iterator. */ |
| 5362 | |
| 5363 | dwarf2_per_cu_data * |
| 5364 | dw2_debug_names_iterator::next () |
| 5365 | { |
| 5366 | if (m_addr == NULL) |
| 5367 | return NULL; |
| 5368 | |
| 5369 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
| 5370 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 5371 | bfd *const abfd = objfile->obfd; |
| 5372 | |
| 5373 | again: |
| 5374 | |
| 5375 | unsigned int bytes_read; |
| 5376 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); |
| 5377 | m_addr += bytes_read; |
| 5378 | if (abbrev == 0) |
| 5379 | return NULL; |
| 5380 | |
| 5381 | const auto indexval_it = m_map.abbrev_map.find (abbrev); |
| 5382 | if (indexval_it == m_map.abbrev_map.cend ()) |
| 5383 | { |
| 5384 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
| 5385 | "[in module %s]"), |
| 5386 | pulongest (abbrev), objfile_name (objfile)); |
| 5387 | return NULL; |
| 5388 | } |
| 5389 | const mapped_debug_names::index_val &indexval = indexval_it->second; |
| 5390 | enum class symbol_linkage { |
| 5391 | unknown, |
| 5392 | static_, |
| 5393 | extern_, |
| 5394 | } symbol_linkage_ = symbol_linkage::unknown; |
| 5395 | dwarf2_per_cu_data *per_cu = NULL; |
| 5396 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) |
| 5397 | { |
| 5398 | ULONGEST ull; |
| 5399 | switch (attr.form) |
| 5400 | { |
| 5401 | case DW_FORM_implicit_const: |
| 5402 | ull = attr.implicit_const; |
| 5403 | break; |
| 5404 | case DW_FORM_flag_present: |
| 5405 | ull = 1; |
| 5406 | break; |
| 5407 | case DW_FORM_udata: |
| 5408 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); |
| 5409 | m_addr += bytes_read; |
| 5410 | break; |
| 5411 | case DW_FORM_ref4: |
| 5412 | ull = read_4_bytes (abfd, m_addr); |
| 5413 | m_addr += 4; |
| 5414 | break; |
| 5415 | case DW_FORM_ref8: |
| 5416 | ull = read_8_bytes (abfd, m_addr); |
| 5417 | m_addr += 8; |
| 5418 | break; |
| 5419 | case DW_FORM_ref_sig8: |
| 5420 | ull = read_8_bytes (abfd, m_addr); |
| 5421 | m_addr += 8; |
| 5422 | break; |
| 5423 | default: |
| 5424 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
| 5425 | dwarf_form_name (attr.form), |
| 5426 | objfile_name (objfile)); |
| 5427 | return NULL; |
| 5428 | } |
| 5429 | switch (attr.dw_idx) |
| 5430 | { |
| 5431 | case DW_IDX_compile_unit: |
| 5432 | /* Don't crash on bad data. */ |
| 5433 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
| 5434 | { |
| 5435 | complaint (_(".debug_names entry has bad CU index %s" |
| 5436 | " [in module %s]"), |
| 5437 | pulongest (ull), |
| 5438 | objfile_name (dwarf2_per_objfile->objfile)); |
| 5439 | continue; |
| 5440 | } |
| 5441 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
| 5442 | break; |
| 5443 | case DW_IDX_type_unit: |
| 5444 | /* Don't crash on bad data. */ |
| 5445 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
| 5446 | { |
| 5447 | complaint (_(".debug_names entry has bad TU index %s" |
| 5448 | " [in module %s]"), |
| 5449 | pulongest (ull), |
| 5450 | objfile_name (dwarf2_per_objfile->objfile)); |
| 5451 | continue; |
| 5452 | } |
| 5453 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
| 5454 | break; |
| 5455 | case DW_IDX_die_offset: |
| 5456 | /* In a per-CU index (as opposed to a per-module index), index |
| 5457 | entries without CU attribute implicitly refer to the single CU. */ |
| 5458 | if (per_cu == NULL) |
| 5459 | per_cu = dwarf2_per_objfile->get_cu (0); |
| 5460 | break; |
| 5461 | case DW_IDX_GNU_internal: |
| 5462 | if (!m_map.augmentation_is_gdb) |
| 5463 | break; |
| 5464 | symbol_linkage_ = symbol_linkage::static_; |
| 5465 | break; |
| 5466 | case DW_IDX_GNU_external: |
| 5467 | if (!m_map.augmentation_is_gdb) |
| 5468 | break; |
| 5469 | symbol_linkage_ = symbol_linkage::extern_; |
| 5470 | break; |
| 5471 | } |
| 5472 | } |
| 5473 | |
| 5474 | /* Skip if already read in. */ |
| 5475 | if (per_cu->v.quick->compunit_symtab) |
| 5476 | goto again; |
| 5477 | |
| 5478 | /* Check static vs global. */ |
| 5479 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
| 5480 | { |
| 5481 | const bool want_static = *m_block_index == STATIC_BLOCK; |
| 5482 | const bool symbol_is_static = |
| 5483 | symbol_linkage_ == symbol_linkage::static_; |
| 5484 | if (want_static != symbol_is_static) |
| 5485 | goto again; |
| 5486 | } |
| 5487 | |
| 5488 | /* Match dw2_symtab_iter_next, symbol_kind |
| 5489 | and debug_names::psymbol_tag. */ |
| 5490 | switch (m_domain) |
| 5491 | { |
| 5492 | case VAR_DOMAIN: |
| 5493 | switch (indexval.dwarf_tag) |
| 5494 | { |
| 5495 | case DW_TAG_variable: |
| 5496 | case DW_TAG_subprogram: |
| 5497 | /* Some types are also in VAR_DOMAIN. */ |
| 5498 | case DW_TAG_typedef: |
| 5499 | case DW_TAG_structure_type: |
| 5500 | break; |
| 5501 | default: |
| 5502 | goto again; |
| 5503 | } |
| 5504 | break; |
| 5505 | case STRUCT_DOMAIN: |
| 5506 | switch (indexval.dwarf_tag) |
| 5507 | { |
| 5508 | case DW_TAG_typedef: |
| 5509 | case DW_TAG_structure_type: |
| 5510 | break; |
| 5511 | default: |
| 5512 | goto again; |
| 5513 | } |
| 5514 | break; |
| 5515 | case LABEL_DOMAIN: |
| 5516 | switch (indexval.dwarf_tag) |
| 5517 | { |
| 5518 | case 0: |
| 5519 | case DW_TAG_variable: |
| 5520 | break; |
| 5521 | default: |
| 5522 | goto again; |
| 5523 | } |
| 5524 | break; |
| 5525 | case MODULE_DOMAIN: |
| 5526 | switch (indexval.dwarf_tag) |
| 5527 | { |
| 5528 | case DW_TAG_module: |
| 5529 | break; |
| 5530 | default: |
| 5531 | goto again; |
| 5532 | } |
| 5533 | break; |
| 5534 | default: |
| 5535 | break; |
| 5536 | } |
| 5537 | |
| 5538 | /* Match dw2_expand_symtabs_matching, symbol_kind and |
| 5539 | debug_names::psymbol_tag. */ |
| 5540 | switch (m_search) |
| 5541 | { |
| 5542 | case VARIABLES_DOMAIN: |
| 5543 | switch (indexval.dwarf_tag) |
| 5544 | { |
| 5545 | case DW_TAG_variable: |
| 5546 | break; |
| 5547 | default: |
| 5548 | goto again; |
| 5549 | } |
| 5550 | break; |
| 5551 | case FUNCTIONS_DOMAIN: |
| 5552 | switch (indexval.dwarf_tag) |
| 5553 | { |
| 5554 | case DW_TAG_subprogram: |
| 5555 | break; |
| 5556 | default: |
| 5557 | goto again; |
| 5558 | } |
| 5559 | break; |
| 5560 | case TYPES_DOMAIN: |
| 5561 | switch (indexval.dwarf_tag) |
| 5562 | { |
| 5563 | case DW_TAG_typedef: |
| 5564 | case DW_TAG_structure_type: |
| 5565 | break; |
| 5566 | default: |
| 5567 | goto again; |
| 5568 | } |
| 5569 | break; |
| 5570 | case MODULES_DOMAIN: |
| 5571 | switch (indexval.dwarf_tag) |
| 5572 | { |
| 5573 | case DW_TAG_module: |
| 5574 | break; |
| 5575 | default: |
| 5576 | goto again; |
| 5577 | } |
| 5578 | default: |
| 5579 | break; |
| 5580 | } |
| 5581 | |
| 5582 | return per_cu; |
| 5583 | } |
| 5584 | |
| 5585 | static struct compunit_symtab * |
| 5586 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
| 5587 | const char *name, domain_enum domain) |
| 5588 | { |
| 5589 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5590 | = get_dwarf2_per_objfile (objfile); |
| 5591 | |
| 5592 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
| 5593 | if (!mapp) |
| 5594 | { |
| 5595 | /* index is NULL if OBJF_READNOW. */ |
| 5596 | return NULL; |
| 5597 | } |
| 5598 | const auto &map = *mapp; |
| 5599 | |
| 5600 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
| 5601 | |
| 5602 | struct compunit_symtab *stab_best = NULL; |
| 5603 | struct dwarf2_per_cu_data *per_cu; |
| 5604 | while ((per_cu = iter.next ()) != NULL) |
| 5605 | { |
| 5606 | struct symbol *sym, *with_opaque = NULL; |
| 5607 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
| 5608 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
| 5609 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 5610 | |
| 5611 | sym = block_find_symbol (block, name, domain, |
| 5612 | block_find_non_opaque_type_preferred, |
| 5613 | &with_opaque); |
| 5614 | |
| 5615 | /* Some caution must be observed with overloaded functions and |
| 5616 | methods, since the index will not contain any overload |
| 5617 | information (but NAME might contain it). */ |
| 5618 | |
| 5619 | if (sym != NULL |
| 5620 | && strcmp_iw (sym->search_name (), name) == 0) |
| 5621 | return stab; |
| 5622 | if (with_opaque != NULL |
| 5623 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
| 5624 | stab_best = stab; |
| 5625 | |
| 5626 | /* Keep looking through other CUs. */ |
| 5627 | } |
| 5628 | |
| 5629 | return stab_best; |
| 5630 | } |
| 5631 | |
| 5632 | /* This dumps minimal information about .debug_names. It is called |
| 5633 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase |
| 5634 | uses this to verify that .debug_names has been loaded. */ |
| 5635 | |
| 5636 | static void |
| 5637 | dw2_debug_names_dump (struct objfile *objfile) |
| 5638 | { |
| 5639 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5640 | = get_dwarf2_per_objfile (objfile); |
| 5641 | |
| 5642 | gdb_assert (dwarf2_per_objfile->using_index); |
| 5643 | printf_filtered (".debug_names:"); |
| 5644 | if (dwarf2_per_objfile->debug_names_table) |
| 5645 | printf_filtered (" exists\n"); |
| 5646 | else |
| 5647 | printf_filtered (" faked for \"readnow\"\n"); |
| 5648 | printf_filtered ("\n"); |
| 5649 | } |
| 5650 | |
| 5651 | static void |
| 5652 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
| 5653 | const char *func_name) |
| 5654 | { |
| 5655 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5656 | = get_dwarf2_per_objfile (objfile); |
| 5657 | |
| 5658 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
| 5659 | if (dwarf2_per_objfile->debug_names_table) |
| 5660 | { |
| 5661 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
| 5662 | |
| 5663 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
| 5664 | |
| 5665 | struct dwarf2_per_cu_data *per_cu; |
| 5666 | while ((per_cu = iter.next ()) != NULL) |
| 5667 | dw2_instantiate_symtab (per_cu, false); |
| 5668 | } |
| 5669 | } |
| 5670 | |
| 5671 | static void |
| 5672 | dw2_debug_names_map_matching_symbols |
| 5673 | (struct objfile *objfile, |
| 5674 | const lookup_name_info &name, domain_enum domain, |
| 5675 | int global, |
| 5676 | gdb::function_view<symbol_found_callback_ftype> callback, |
| 5677 | symbol_compare_ftype *ordered_compare) |
| 5678 | { |
| 5679 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5680 | = get_dwarf2_per_objfile (objfile); |
| 5681 | |
| 5682 | /* debug_names_table is NULL if OBJF_READNOW. */ |
| 5683 | if (!dwarf2_per_objfile->debug_names_table) |
| 5684 | return; |
| 5685 | |
| 5686 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
| 5687 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; |
| 5688 | |
| 5689 | const char *match_name = name.ada ().lookup_name ().c_str (); |
| 5690 | auto matcher = [&] (const char *symname) |
| 5691 | { |
| 5692 | if (ordered_compare == nullptr) |
| 5693 | return true; |
| 5694 | return ordered_compare (symname, match_name) == 0; |
| 5695 | }; |
| 5696 | |
| 5697 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, |
| 5698 | [&] (offset_type namei) |
| 5699 | { |
| 5700 | /* The name was matched, now expand corresponding CUs that were |
| 5701 | marked. */ |
| 5702 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); |
| 5703 | |
| 5704 | struct dwarf2_per_cu_data *per_cu; |
| 5705 | while ((per_cu = iter.next ()) != NULL) |
| 5706 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); |
| 5707 | return true; |
| 5708 | }); |
| 5709 | |
| 5710 | /* It's a shame we couldn't do this inside the |
| 5711 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs |
| 5712 | that have already been expanded. Instead, this loop matches what |
| 5713 | the psymtab code does. */ |
| 5714 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 5715 | { |
| 5716 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; |
| 5717 | if (cust != nullptr) |
| 5718 | { |
| 5719 | const struct block *block |
| 5720 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); |
| 5721 | if (!iterate_over_symbols_terminated (block, name, |
| 5722 | domain, callback)) |
| 5723 | break; |
| 5724 | } |
| 5725 | } |
| 5726 | } |
| 5727 | |
| 5728 | static void |
| 5729 | dw2_debug_names_expand_symtabs_matching |
| 5730 | (struct objfile *objfile, |
| 5731 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 5732 | const lookup_name_info *lookup_name, |
| 5733 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 5734 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 5735 | enum search_domain kind) |
| 5736 | { |
| 5737 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5738 | = get_dwarf2_per_objfile (objfile); |
| 5739 | |
| 5740 | /* debug_names_table is NULL if OBJF_READNOW. */ |
| 5741 | if (!dwarf2_per_objfile->debug_names_table) |
| 5742 | return; |
| 5743 | |
| 5744 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
| 5745 | |
| 5746 | if (symbol_matcher == NULL && lookup_name == NULL) |
| 5747 | { |
| 5748 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 5749 | { |
| 5750 | QUIT; |
| 5751 | |
| 5752 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 5753 | expansion_notify); |
| 5754 | } |
| 5755 | return; |
| 5756 | } |
| 5757 | |
| 5758 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
| 5759 | |
| 5760 | dw2_expand_symtabs_matching_symbol (map, *lookup_name, |
| 5761 | symbol_matcher, |
| 5762 | kind, [&] (offset_type namei) |
| 5763 | { |
| 5764 | /* The name was matched, now expand corresponding CUs that were |
| 5765 | marked. */ |
| 5766 | dw2_debug_names_iterator iter (map, kind, namei); |
| 5767 | |
| 5768 | struct dwarf2_per_cu_data *per_cu; |
| 5769 | while ((per_cu = iter.next ()) != NULL) |
| 5770 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 5771 | expansion_notify); |
| 5772 | return true; |
| 5773 | }); |
| 5774 | } |
| 5775 | |
| 5776 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
| 5777 | { |
| 5778 | dw2_has_symbols, |
| 5779 | dw2_find_last_source_symtab, |
| 5780 | dw2_forget_cached_source_info, |
| 5781 | dw2_map_symtabs_matching_filename, |
| 5782 | dw2_debug_names_lookup_symbol, |
| 5783 | NULL, |
| 5784 | dw2_print_stats, |
| 5785 | dw2_debug_names_dump, |
| 5786 | dw2_debug_names_expand_symtabs_for_function, |
| 5787 | dw2_expand_all_symtabs, |
| 5788 | dw2_expand_symtabs_with_fullname, |
| 5789 | dw2_debug_names_map_matching_symbols, |
| 5790 | dw2_debug_names_expand_symtabs_matching, |
| 5791 | dw2_find_pc_sect_compunit_symtab, |
| 5792 | NULL, |
| 5793 | dw2_map_symbol_filenames |
| 5794 | }; |
| 5795 | |
| 5796 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
| 5797 | to either a dwarf2_per_objfile or dwz_file object. */ |
| 5798 | |
| 5799 | template <typename T> |
| 5800 | static gdb::array_view<const gdb_byte> |
| 5801 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) |
| 5802 | { |
| 5803 | dwarf2_section_info *section = §ion_owner->gdb_index; |
| 5804 | |
| 5805 | if (section->empty ()) |
| 5806 | return {}; |
| 5807 | |
| 5808 | /* Older elfutils strip versions could keep the section in the main |
| 5809 | executable while splitting it for the separate debug info file. */ |
| 5810 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
| 5811 | return {}; |
| 5812 | |
| 5813 | section->read (obj); |
| 5814 | |
| 5815 | /* dwarf2_section_info::size is a bfd_size_type, while |
| 5816 | gdb::array_view works with size_t. On 32-bit hosts, with |
| 5817 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t |
| 5818 | is 32-bit. So we need an explicit narrowing conversion here. |
| 5819 | This is fine, because it's impossible to allocate or mmap an |
| 5820 | array/buffer larger than what size_t can represent. */ |
| 5821 | return gdb::make_array_view (section->buffer, section->size); |
| 5822 | } |
| 5823 | |
| 5824 | /* Lookup the index cache for the contents of the index associated to |
| 5825 | DWARF2_OBJ. */ |
| 5826 | |
| 5827 | static gdb::array_view<const gdb_byte> |
| 5828 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) |
| 5829 | { |
| 5830 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); |
| 5831 | if (build_id == nullptr) |
| 5832 | return {}; |
| 5833 | |
| 5834 | return global_index_cache.lookup_gdb_index (build_id, |
| 5835 | &dwarf2_obj->index_cache_res); |
| 5836 | } |
| 5837 | |
| 5838 | /* Same as the above, but for DWZ. */ |
| 5839 | |
| 5840 | static gdb::array_view<const gdb_byte> |
| 5841 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) |
| 5842 | { |
| 5843 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); |
| 5844 | if (build_id == nullptr) |
| 5845 | return {}; |
| 5846 | |
| 5847 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); |
| 5848 | } |
| 5849 | |
| 5850 | /* See symfile.h. */ |
| 5851 | |
| 5852 | bool |
| 5853 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) |
| 5854 | { |
| 5855 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5856 | = get_dwarf2_per_objfile (objfile); |
| 5857 | |
| 5858 | /* If we're about to read full symbols, don't bother with the |
| 5859 | indices. In this case we also don't care if some other debug |
| 5860 | format is making psymtabs, because they are all about to be |
| 5861 | expanded anyway. */ |
| 5862 | if ((objfile->flags & OBJF_READNOW)) |
| 5863 | { |
| 5864 | dwarf2_per_objfile->using_index = 1; |
| 5865 | create_all_comp_units (dwarf2_per_objfile); |
| 5866 | create_all_type_units (dwarf2_per_objfile); |
| 5867 | dwarf2_per_objfile->quick_file_names_table |
| 5868 | = create_quick_file_names_table |
| 5869 | (dwarf2_per_objfile->all_comp_units.size ()); |
| 5870 | |
| 5871 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
| 5872 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
| 5873 | { |
| 5874 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
| 5875 | |
| 5876 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 5877 | struct dwarf2_per_cu_quick_data); |
| 5878 | } |
| 5879 | |
| 5880 | /* Return 1 so that gdb sees the "quick" functions. However, |
| 5881 | these functions will be no-ops because we will have expanded |
| 5882 | all symtabs. */ |
| 5883 | *index_kind = dw_index_kind::GDB_INDEX; |
| 5884 | return true; |
| 5885 | } |
| 5886 | |
| 5887 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
| 5888 | { |
| 5889 | *index_kind = dw_index_kind::DEBUG_NAMES; |
| 5890 | return true; |
| 5891 | } |
| 5892 | |
| 5893 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
| 5894 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, |
| 5895 | get_gdb_index_contents_from_section<dwz_file>)) |
| 5896 | { |
| 5897 | *index_kind = dw_index_kind::GDB_INDEX; |
| 5898 | return true; |
| 5899 | } |
| 5900 | |
| 5901 | /* ... otherwise, try to find the index in the index cache. */ |
| 5902 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
| 5903 | get_gdb_index_contents_from_cache, |
| 5904 | get_gdb_index_contents_from_cache_dwz)) |
| 5905 | { |
| 5906 | global_index_cache.hit (); |
| 5907 | *index_kind = dw_index_kind::GDB_INDEX; |
| 5908 | return true; |
| 5909 | } |
| 5910 | |
| 5911 | global_index_cache.miss (); |
| 5912 | return false; |
| 5913 | } |
| 5914 | |
| 5915 | \f |
| 5916 | |
| 5917 | /* Build a partial symbol table. */ |
| 5918 | |
| 5919 | void |
| 5920 | dwarf2_build_psymtabs (struct objfile *objfile) |
| 5921 | { |
| 5922 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5923 | = get_dwarf2_per_objfile (objfile); |
| 5924 | |
| 5925 | init_psymbol_list (objfile, 1024); |
| 5926 | |
| 5927 | try |
| 5928 | { |
| 5929 | /* This isn't really ideal: all the data we allocate on the |
| 5930 | objfile's obstack is still uselessly kept around. However, |
| 5931 | freeing it seems unsafe. */ |
| 5932 | psymtab_discarder psymtabs (objfile); |
| 5933 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
| 5934 | psymtabs.keep (); |
| 5935 | |
| 5936 | /* (maybe) store an index in the cache. */ |
| 5937 | global_index_cache.store (dwarf2_per_objfile); |
| 5938 | } |
| 5939 | catch (const gdb_exception_error &except) |
| 5940 | { |
| 5941 | exception_print (gdb_stderr, except); |
| 5942 | } |
| 5943 | } |
| 5944 | |
| 5945 | /* Find the base address of the compilation unit for range lists and |
| 5946 | location lists. It will normally be specified by DW_AT_low_pc. |
| 5947 | In DWARF-3 draft 4, the base address could be overridden by |
| 5948 | DW_AT_entry_pc. It's been removed, but GCC still uses this for |
| 5949 | compilation units with discontinuous ranges. */ |
| 5950 | |
| 5951 | static void |
| 5952 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) |
| 5953 | { |
| 5954 | struct attribute *attr; |
| 5955 | |
| 5956 | cu->base_address.reset (); |
| 5957 | |
| 5958 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); |
| 5959 | if (attr != nullptr) |
| 5960 | cu->base_address = attr->value_as_address (); |
| 5961 | else |
| 5962 | { |
| 5963 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 5964 | if (attr != nullptr) |
| 5965 | cu->base_address = attr->value_as_address (); |
| 5966 | } |
| 5967 | } |
| 5968 | |
| 5969 | /* Helper function that returns the proper abbrev section for |
| 5970 | THIS_CU. */ |
| 5971 | |
| 5972 | static struct dwarf2_section_info * |
| 5973 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) |
| 5974 | { |
| 5975 | struct dwarf2_section_info *abbrev; |
| 5976 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 5977 | |
| 5978 | if (this_cu->is_dwz) |
| 5979 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
| 5980 | else |
| 5981 | abbrev = &dwarf2_per_objfile->abbrev; |
| 5982 | |
| 5983 | return abbrev; |
| 5984 | } |
| 5985 | |
| 5986 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
| 5987 | |
| 5988 | static sect_offset |
| 5989 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5990 | struct dwarf2_section_info *section, |
| 5991 | sect_offset sect_off) |
| 5992 | { |
| 5993 | bfd *abfd = section->get_bfd_owner (); |
| 5994 | const gdb_byte *info_ptr; |
| 5995 | unsigned int initial_length_size, offset_size; |
| 5996 | uint16_t version; |
| 5997 | |
| 5998 | section->read (dwarf2_per_objfile->objfile); |
| 5999 | info_ptr = section->buffer + to_underlying (sect_off); |
| 6000 | read_initial_length (abfd, info_ptr, &initial_length_size); |
| 6001 | offset_size = initial_length_size == 4 ? 4 : 8; |
| 6002 | info_ptr += initial_length_size; |
| 6003 | |
| 6004 | version = read_2_bytes (abfd, info_ptr); |
| 6005 | info_ptr += 2; |
| 6006 | if (version >= 5) |
| 6007 | { |
| 6008 | /* Skip unit type and address size. */ |
| 6009 | info_ptr += 2; |
| 6010 | } |
| 6011 | |
| 6012 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
| 6013 | } |
| 6014 | |
| 6015 | /* A partial symtab that is used only for include files. */ |
| 6016 | struct dwarf2_include_psymtab : public partial_symtab |
| 6017 | { |
| 6018 | dwarf2_include_psymtab (const char *filename, struct objfile *objfile) |
| 6019 | : partial_symtab (filename, objfile) |
| 6020 | { |
| 6021 | } |
| 6022 | |
| 6023 | void read_symtab (struct objfile *objfile) override |
| 6024 | { |
| 6025 | /* It's an include file, no symbols to read for it. |
| 6026 | Everything is in the includer symtab. */ |
| 6027 | |
| 6028 | /* The expansion of a dwarf2_include_psymtab is just a trigger for |
| 6029 | expansion of the includer psymtab. We use the dependencies[0] field to |
| 6030 | model the includer. But if we go the regular route of calling |
| 6031 | expand_psymtab here, and having expand_psymtab call expand_dependencies |
| 6032 | to expand the includer, we'll only use expand_psymtab on the includer |
| 6033 | (making it a non-toplevel psymtab), while if we expand the includer via |
| 6034 | another path, we'll use read_symtab (making it a toplevel psymtab). |
| 6035 | So, don't pretend a dwarf2_include_psymtab is an actual toplevel |
| 6036 | psymtab, and trigger read_symtab on the includer here directly. */ |
| 6037 | includer ()->read_symtab (objfile); |
| 6038 | } |
| 6039 | |
| 6040 | void expand_psymtab (struct objfile *objfile) override |
| 6041 | { |
| 6042 | /* This is not called by read_symtab, and should not be called by any |
| 6043 | expand_dependencies. */ |
| 6044 | gdb_assert (false); |
| 6045 | } |
| 6046 | |
| 6047 | bool readin_p () const override |
| 6048 | { |
| 6049 | return includer ()->readin_p (); |
| 6050 | } |
| 6051 | |
| 6052 | struct compunit_symtab *get_compunit_symtab () const override |
| 6053 | { |
| 6054 | return nullptr; |
| 6055 | } |
| 6056 | |
| 6057 | private: |
| 6058 | partial_symtab *includer () const |
| 6059 | { |
| 6060 | /* An include psymtab has exactly one dependency: the psymtab that |
| 6061 | includes it. */ |
| 6062 | gdb_assert (this->number_of_dependencies == 1); |
| 6063 | return this->dependencies[0]; |
| 6064 | } |
| 6065 | }; |
| 6066 | |
| 6067 | /* Allocate a new partial symtab for file named NAME and mark this new |
| 6068 | partial symtab as being an include of PST. */ |
| 6069 | |
| 6070 | static void |
| 6071 | dwarf2_create_include_psymtab (const char *name, dwarf2_psymtab *pst, |
| 6072 | struct objfile *objfile) |
| 6073 | { |
| 6074 | dwarf2_include_psymtab *subpst = new dwarf2_include_psymtab (name, objfile); |
| 6075 | |
| 6076 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
| 6077 | { |
| 6078 | /* It shares objfile->objfile_obstack. */ |
| 6079 | subpst->dirname = pst->dirname; |
| 6080 | } |
| 6081 | |
| 6082 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
| 6083 | subpst->dependencies[0] = pst; |
| 6084 | subpst->number_of_dependencies = 1; |
| 6085 | } |
| 6086 | |
| 6087 | /* Read the Line Number Program data and extract the list of files |
| 6088 | included by the source file represented by PST. Build an include |
| 6089 | partial symtab for each of these included files. */ |
| 6090 | |
| 6091 | static void |
| 6092 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, |
| 6093 | struct die_info *die, |
| 6094 | dwarf2_psymtab *pst) |
| 6095 | { |
| 6096 | line_header_up lh; |
| 6097 | struct attribute *attr; |
| 6098 | |
| 6099 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 6100 | if (attr != nullptr) |
| 6101 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
| 6102 | if (lh == NULL) |
| 6103 | return; /* No linetable, so no includes. */ |
| 6104 | |
| 6105 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
| 6106 | that we pass in the raw text_low here; that is ok because we're |
| 6107 | only decoding the line table to make include partial symtabs, and |
| 6108 | so the addresses aren't really used. */ |
| 6109 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
| 6110 | pst->raw_text_low (), 1); |
| 6111 | } |
| 6112 | |
| 6113 | static hashval_t |
| 6114 | hash_signatured_type (const void *item) |
| 6115 | { |
| 6116 | const struct signatured_type *sig_type |
| 6117 | = (const struct signatured_type *) item; |
| 6118 | |
| 6119 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
| 6120 | return sig_type->signature; |
| 6121 | } |
| 6122 | |
| 6123 | static int |
| 6124 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
| 6125 | { |
| 6126 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
| 6127 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; |
| 6128 | |
| 6129 | return lhs->signature == rhs->signature; |
| 6130 | } |
| 6131 | |
| 6132 | /* Allocate a hash table for signatured types. */ |
| 6133 | |
| 6134 | static htab_up |
| 6135 | allocate_signatured_type_table () |
| 6136 | { |
| 6137 | return htab_up (htab_create_alloc (41, |
| 6138 | hash_signatured_type, |
| 6139 | eq_signatured_type, |
| 6140 | NULL, xcalloc, xfree)); |
| 6141 | } |
| 6142 | |
| 6143 | /* A helper function to add a signatured type CU to a table. */ |
| 6144 | |
| 6145 | static int |
| 6146 | add_signatured_type_cu_to_table (void **slot, void *datum) |
| 6147 | { |
| 6148 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
| 6149 | std::vector<signatured_type *> *all_type_units |
| 6150 | = (std::vector<signatured_type *> *) datum; |
| 6151 | |
| 6152 | all_type_units->push_back (sigt); |
| 6153 | |
| 6154 | return 1; |
| 6155 | } |
| 6156 | |
| 6157 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
| 6158 | and fill them into TYPES_HTAB. It will process only type units, |
| 6159 | therefore DW_UT_type. */ |
| 6160 | |
| 6161 | static void |
| 6162 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6163 | struct dwo_file *dwo_file, |
| 6164 | dwarf2_section_info *section, htab_up &types_htab, |
| 6165 | rcuh_kind section_kind) |
| 6166 | { |
| 6167 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6168 | struct dwarf2_section_info *abbrev_section; |
| 6169 | bfd *abfd; |
| 6170 | const gdb_byte *info_ptr, *end_ptr; |
| 6171 | |
| 6172 | abbrev_section = (dwo_file != NULL |
| 6173 | ? &dwo_file->sections.abbrev |
| 6174 | : &dwarf2_per_objfile->abbrev); |
| 6175 | |
| 6176 | if (dwarf_read_debug) |
| 6177 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
| 6178 | section->get_name (), |
| 6179 | abbrev_section->get_file_name ()); |
| 6180 | |
| 6181 | section->read (objfile); |
| 6182 | info_ptr = section->buffer; |
| 6183 | |
| 6184 | if (info_ptr == NULL) |
| 6185 | return; |
| 6186 | |
| 6187 | /* We can't set abfd until now because the section may be empty or |
| 6188 | not present, in which case the bfd is unknown. */ |
| 6189 | abfd = section->get_bfd_owner (); |
| 6190 | |
| 6191 | /* We don't use cutu_reader here because we don't need to read |
| 6192 | any dies: the signature is in the header. */ |
| 6193 | |
| 6194 | end_ptr = info_ptr + section->size; |
| 6195 | while (info_ptr < end_ptr) |
| 6196 | { |
| 6197 | struct signatured_type *sig_type; |
| 6198 | struct dwo_unit *dwo_tu; |
| 6199 | void **slot; |
| 6200 | const gdb_byte *ptr = info_ptr; |
| 6201 | struct comp_unit_head header; |
| 6202 | unsigned int length; |
| 6203 | |
| 6204 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
| 6205 | |
| 6206 | /* Initialize it due to a false compiler warning. */ |
| 6207 | header.signature = -1; |
| 6208 | header.type_cu_offset_in_tu = (cu_offset) -1; |
| 6209 | |
| 6210 | /* We need to read the type's signature in order to build the hash |
| 6211 | table, but we don't need anything else just yet. */ |
| 6212 | |
| 6213 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
| 6214 | abbrev_section, ptr, section_kind); |
| 6215 | |
| 6216 | length = header.get_length (); |
| 6217 | |
| 6218 | /* Skip dummy type units. */ |
| 6219 | if (ptr >= info_ptr + length |
| 6220 | || peek_abbrev_code (abfd, ptr) == 0 |
| 6221 | || header.unit_type != DW_UT_type) |
| 6222 | { |
| 6223 | info_ptr += length; |
| 6224 | continue; |
| 6225 | } |
| 6226 | |
| 6227 | if (types_htab == NULL) |
| 6228 | { |
| 6229 | if (dwo_file) |
| 6230 | types_htab = allocate_dwo_unit_table (); |
| 6231 | else |
| 6232 | types_htab = allocate_signatured_type_table (); |
| 6233 | } |
| 6234 | |
| 6235 | if (dwo_file) |
| 6236 | { |
| 6237 | sig_type = NULL; |
| 6238 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 6239 | struct dwo_unit); |
| 6240 | dwo_tu->dwo_file = dwo_file; |
| 6241 | dwo_tu->signature = header.signature; |
| 6242 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
| 6243 | dwo_tu->section = section; |
| 6244 | dwo_tu->sect_off = sect_off; |
| 6245 | dwo_tu->length = length; |
| 6246 | } |
| 6247 | else |
| 6248 | { |
| 6249 | /* N.B.: type_offset is not usable if this type uses a DWO file. |
| 6250 | The real type_offset is in the DWO file. */ |
| 6251 | dwo_tu = NULL; |
| 6252 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 6253 | struct signatured_type); |
| 6254 | sig_type->signature = header.signature; |
| 6255 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
| 6256 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 6257 | sig_type->per_cu.is_debug_types = 1; |
| 6258 | sig_type->per_cu.section = section; |
| 6259 | sig_type->per_cu.sect_off = sect_off; |
| 6260 | sig_type->per_cu.length = length; |
| 6261 | } |
| 6262 | |
| 6263 | slot = htab_find_slot (types_htab.get (), |
| 6264 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
| 6265 | INSERT); |
| 6266 | gdb_assert (slot != NULL); |
| 6267 | if (*slot != NULL) |
| 6268 | { |
| 6269 | sect_offset dup_sect_off; |
| 6270 | |
| 6271 | if (dwo_file) |
| 6272 | { |
| 6273 | const struct dwo_unit *dup_tu |
| 6274 | = (const struct dwo_unit *) *slot; |
| 6275 | |
| 6276 | dup_sect_off = dup_tu->sect_off; |
| 6277 | } |
| 6278 | else |
| 6279 | { |
| 6280 | const struct signatured_type *dup_tu |
| 6281 | = (const struct signatured_type *) *slot; |
| 6282 | |
| 6283 | dup_sect_off = dup_tu->per_cu.sect_off; |
| 6284 | } |
| 6285 | |
| 6286 | complaint (_("debug type entry at offset %s is duplicate to" |
| 6287 | " the entry at offset %s, signature %s"), |
| 6288 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), |
| 6289 | hex_string (header.signature)); |
| 6290 | } |
| 6291 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
| 6292 | |
| 6293 | if (dwarf_read_debug > 1) |
| 6294 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
| 6295 | sect_offset_str (sect_off), |
| 6296 | hex_string (header.signature)); |
| 6297 | |
| 6298 | info_ptr += length; |
| 6299 | } |
| 6300 | } |
| 6301 | |
| 6302 | /* Create the hash table of all entries in the .debug_types |
| 6303 | (or .debug_types.dwo) section(s). |
| 6304 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, |
| 6305 | otherwise it is NULL. |
| 6306 | |
| 6307 | The result is a pointer to the hash table or NULL if there are no types. |
| 6308 | |
| 6309 | Note: This function processes DWO files only, not DWP files. */ |
| 6310 | |
| 6311 | static void |
| 6312 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6313 | struct dwo_file *dwo_file, |
| 6314 | gdb::array_view<dwarf2_section_info> type_sections, |
| 6315 | htab_up &types_htab) |
| 6316 | { |
| 6317 | for (dwarf2_section_info §ion : type_sections) |
| 6318 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, |
| 6319 | types_htab, rcuh_kind::TYPE); |
| 6320 | } |
| 6321 | |
| 6322 | /* Create the hash table of all entries in the .debug_types section, |
| 6323 | and initialize all_type_units. |
| 6324 | The result is zero if there is an error (e.g. missing .debug_types section), |
| 6325 | otherwise non-zero. */ |
| 6326 | |
| 6327 | static int |
| 6328 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 6329 | { |
| 6330 | htab_up types_htab; |
| 6331 | |
| 6332 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
| 6333 | &dwarf2_per_objfile->info, types_htab, |
| 6334 | rcuh_kind::COMPILE); |
| 6335 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
| 6336 | dwarf2_per_objfile->types, types_htab); |
| 6337 | if (types_htab == NULL) |
| 6338 | { |
| 6339 | dwarf2_per_objfile->signatured_types = NULL; |
| 6340 | return 0; |
| 6341 | } |
| 6342 | |
| 6343 | dwarf2_per_objfile->signatured_types = std::move (types_htab); |
| 6344 | |
| 6345 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
| 6346 | dwarf2_per_objfile->all_type_units.reserve |
| 6347 | (htab_elements (dwarf2_per_objfile->signatured_types.get ())); |
| 6348 | |
| 6349 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types.get (), |
| 6350 | add_signatured_type_cu_to_table, |
| 6351 | &dwarf2_per_objfile->all_type_units); |
| 6352 | |
| 6353 | return 1; |
| 6354 | } |
| 6355 | |
| 6356 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
| 6357 | If SLOT is non-NULL, it is the entry to use in the hash table. |
| 6358 | Otherwise we find one. */ |
| 6359 | |
| 6360 | static struct signatured_type * |
| 6361 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
| 6362 | void **slot) |
| 6363 | { |
| 6364 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6365 | |
| 6366 | if (dwarf2_per_objfile->all_type_units.size () |
| 6367 | == dwarf2_per_objfile->all_type_units.capacity ()) |
| 6368 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
| 6369 | |
| 6370 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 6371 | struct signatured_type); |
| 6372 | |
| 6373 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
| 6374 | sig_type->signature = sig; |
| 6375 | sig_type->per_cu.is_debug_types = 1; |
| 6376 | if (dwarf2_per_objfile->using_index) |
| 6377 | { |
| 6378 | sig_type->per_cu.v.quick = |
| 6379 | OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 6380 | struct dwarf2_per_cu_quick_data); |
| 6381 | } |
| 6382 | |
| 6383 | if (slot == NULL) |
| 6384 | { |
| 6385 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
| 6386 | sig_type, INSERT); |
| 6387 | } |
| 6388 | gdb_assert (*slot == NULL); |
| 6389 | *slot = sig_type; |
| 6390 | /* The rest of sig_type must be filled in by the caller. */ |
| 6391 | return sig_type; |
| 6392 | } |
| 6393 | |
| 6394 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
| 6395 | Fill in SIG_ENTRY with DWO_ENTRY. */ |
| 6396 | |
| 6397 | static void |
| 6398 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6399 | struct signatured_type *sig_entry, |
| 6400 | struct dwo_unit *dwo_entry) |
| 6401 | { |
| 6402 | /* Make sure we're not clobbering something we don't expect to. */ |
| 6403 | gdb_assert (! sig_entry->per_cu.queued); |
| 6404 | gdb_assert (sig_entry->per_cu.cu == NULL); |
| 6405 | if (dwarf2_per_objfile->using_index) |
| 6406 | { |
| 6407 | gdb_assert (sig_entry->per_cu.v.quick != NULL); |
| 6408 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
| 6409 | } |
| 6410 | else |
| 6411 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); |
| 6412 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
| 6413 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
| 6414 | gdb_assert (sig_entry->type_unit_group == NULL); |
| 6415 | gdb_assert (sig_entry->dwo_unit == NULL); |
| 6416 | |
| 6417 | sig_entry->per_cu.section = dwo_entry->section; |
| 6418 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
| 6419 | sig_entry->per_cu.length = dwo_entry->length; |
| 6420 | sig_entry->per_cu.reading_dwo_directly = 1; |
| 6421 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 6422 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
| 6423 | sig_entry->dwo_unit = dwo_entry; |
| 6424 | } |
| 6425 | |
| 6426 | /* Subroutine of lookup_signatured_type. |
| 6427 | If we haven't read the TU yet, create the signatured_type data structure |
| 6428 | for a TU to be read in directly from a DWO file, bypassing the stub. |
| 6429 | This is the "Stay in DWO Optimization": When there is no DWP file and we're |
| 6430 | using .gdb_index, then when reading a CU we want to stay in the DWO file |
| 6431 | containing that CU. Otherwise we could end up reading several other DWO |
| 6432 | files (due to comdat folding) to process the transitive closure of all the |
| 6433 | mentioned TUs, and that can be slow. The current DWO file will have every |
| 6434 | type signature that it needs. |
| 6435 | We only do this for .gdb_index because in the psymtab case we already have |
| 6436 | to read all the DWOs to build the type unit groups. */ |
| 6437 | |
| 6438 | static struct signatured_type * |
| 6439 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 6440 | { |
| 6441 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6442 | = cu->per_cu->dwarf2_per_objfile; |
| 6443 | struct dwo_file *dwo_file; |
| 6444 | struct dwo_unit find_dwo_entry, *dwo_entry; |
| 6445 | struct signatured_type find_sig_entry, *sig_entry; |
| 6446 | void **slot; |
| 6447 | |
| 6448 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); |
| 6449 | |
| 6450 | /* If TU skeletons have been removed then we may not have read in any |
| 6451 | TUs yet. */ |
| 6452 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 6453 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
| 6454 | |
| 6455 | /* We only ever need to read in one copy of a signatured type. |
| 6456 | Use the global signatured_types array to do our own comdat-folding |
| 6457 | of types. If this is the first time we're reading this TU, and |
| 6458 | the TU has an entry in .gdb_index, replace the recorded data from |
| 6459 | .gdb_index with this TU. */ |
| 6460 | |
| 6461 | find_sig_entry.signature = sig; |
| 6462 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
| 6463 | &find_sig_entry, INSERT); |
| 6464 | sig_entry = (struct signatured_type *) *slot; |
| 6465 | |
| 6466 | /* We can get here with the TU already read, *or* in the process of being |
| 6467 | read. Don't reassign the global entry to point to this DWO if that's |
| 6468 | the case. Also note that if the TU is already being read, it may not |
| 6469 | have come from a DWO, the program may be a mix of Fission-compiled |
| 6470 | code and non-Fission-compiled code. */ |
| 6471 | |
| 6472 | /* Have we already tried to read this TU? |
| 6473 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it |
| 6474 | needn't exist in the global table yet). */ |
| 6475 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) |
| 6476 | return sig_entry; |
| 6477 | |
| 6478 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
| 6479 | dwo_unit of the TU itself. */ |
| 6480 | dwo_file = cu->dwo_unit->dwo_file; |
| 6481 | |
| 6482 | /* Ok, this is the first time we're reading this TU. */ |
| 6483 | if (dwo_file->tus == NULL) |
| 6484 | return NULL; |
| 6485 | find_dwo_entry.signature = sig; |
| 6486 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
| 6487 | &find_dwo_entry); |
| 6488 | if (dwo_entry == NULL) |
| 6489 | return NULL; |
| 6490 | |
| 6491 | /* If the global table doesn't have an entry for this TU, add one. */ |
| 6492 | if (sig_entry == NULL) |
| 6493 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
| 6494 | |
| 6495 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
| 6496 | sig_entry->per_cu.tu_read = 1; |
| 6497 | return sig_entry; |
| 6498 | } |
| 6499 | |
| 6500 | /* Subroutine of lookup_signatured_type. |
| 6501 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index |
| 6502 | then try the DWP file. If the TU stub (skeleton) has been removed then |
| 6503 | it won't be in .gdb_index. */ |
| 6504 | |
| 6505 | static struct signatured_type * |
| 6506 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 6507 | { |
| 6508 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6509 | = cu->per_cu->dwarf2_per_objfile; |
| 6510 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
| 6511 | struct dwo_unit *dwo_entry; |
| 6512 | struct signatured_type find_sig_entry, *sig_entry; |
| 6513 | void **slot; |
| 6514 | |
| 6515 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); |
| 6516 | gdb_assert (dwp_file != NULL); |
| 6517 | |
| 6518 | /* If TU skeletons have been removed then we may not have read in any |
| 6519 | TUs yet. */ |
| 6520 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 6521 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
| 6522 | |
| 6523 | find_sig_entry.signature = sig; |
| 6524 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
| 6525 | &find_sig_entry, INSERT); |
| 6526 | sig_entry = (struct signatured_type *) *slot; |
| 6527 | |
| 6528 | /* Have we already tried to read this TU? |
| 6529 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it |
| 6530 | needn't exist in the global table yet). */ |
| 6531 | if (sig_entry != NULL) |
| 6532 | return sig_entry; |
| 6533 | |
| 6534 | if (dwp_file->tus == NULL) |
| 6535 | return NULL; |
| 6536 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
| 6537 | sig, 1 /* is_debug_types */); |
| 6538 | if (dwo_entry == NULL) |
| 6539 | return NULL; |
| 6540 | |
| 6541 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
| 6542 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
| 6543 | |
| 6544 | return sig_entry; |
| 6545 | } |
| 6546 | |
| 6547 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
| 6548 | Returns NULL if signature SIG is not present in the table. |
| 6549 | It is up to the caller to complain about this. */ |
| 6550 | |
| 6551 | static struct signatured_type * |
| 6552 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 6553 | { |
| 6554 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6555 | = cu->per_cu->dwarf2_per_objfile; |
| 6556 | |
| 6557 | if (cu->dwo_unit |
| 6558 | && dwarf2_per_objfile->using_index) |
| 6559 | { |
| 6560 | /* We're in a DWO/DWP file, and we're using .gdb_index. |
| 6561 | These cases require special processing. */ |
| 6562 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
| 6563 | return lookup_dwo_signatured_type (cu, sig); |
| 6564 | else |
| 6565 | return lookup_dwp_signatured_type (cu, sig); |
| 6566 | } |
| 6567 | else |
| 6568 | { |
| 6569 | struct signatured_type find_entry, *entry; |
| 6570 | |
| 6571 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 6572 | return NULL; |
| 6573 | find_entry.signature = sig; |
| 6574 | entry = ((struct signatured_type *) |
| 6575 | htab_find (dwarf2_per_objfile->signatured_types.get (), |
| 6576 | &find_entry)); |
| 6577 | return entry; |
| 6578 | } |
| 6579 | } |
| 6580 | |
| 6581 | /* Low level DIE reading support. */ |
| 6582 | |
| 6583 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
| 6584 | |
| 6585 | static void |
| 6586 | init_cu_die_reader (struct die_reader_specs *reader, |
| 6587 | struct dwarf2_cu *cu, |
| 6588 | struct dwarf2_section_info *section, |
| 6589 | struct dwo_file *dwo_file, |
| 6590 | struct abbrev_table *abbrev_table) |
| 6591 | { |
| 6592 | gdb_assert (section->readin && section->buffer != NULL); |
| 6593 | reader->abfd = section->get_bfd_owner (); |
| 6594 | reader->cu = cu; |
| 6595 | reader->dwo_file = dwo_file; |
| 6596 | reader->die_section = section; |
| 6597 | reader->buffer = section->buffer; |
| 6598 | reader->buffer_end = section->buffer + section->size; |
| 6599 | reader->abbrev_table = abbrev_table; |
| 6600 | } |
| 6601 | |
| 6602 | /* Subroutine of cutu_reader to simplify it. |
| 6603 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
| 6604 | There's just a lot of work to do, and cutu_reader is big enough |
| 6605 | already. |
| 6606 | |
| 6607 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes |
| 6608 | from it to the DIE in the DWO. If NULL we are skipping the stub. |
| 6609 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
| 6610 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir |
| 6611 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
| 6612 | STUB_COMP_DIR may be non-NULL. |
| 6613 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
| 6614 | are filled in with the info of the DIE from the DWO file. |
| 6615 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
| 6616 | from the dwo. Since *RESULT_READER references this abbrev table, it must be |
| 6617 | kept around for at least as long as *RESULT_READER. |
| 6618 | |
| 6619 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
| 6620 | |
| 6621 | static int |
| 6622 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, |
| 6623 | struct dwo_unit *dwo_unit, |
| 6624 | struct die_info *stub_comp_unit_die, |
| 6625 | const char *stub_comp_dir, |
| 6626 | struct die_reader_specs *result_reader, |
| 6627 | const gdb_byte **result_info_ptr, |
| 6628 | struct die_info **result_comp_unit_die, |
| 6629 | abbrev_table_up *result_dwo_abbrev_table) |
| 6630 | { |
| 6631 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 6632 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6633 | struct dwarf2_cu *cu = this_cu->cu; |
| 6634 | bfd *abfd; |
| 6635 | const gdb_byte *begin_info_ptr, *info_ptr; |
| 6636 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
| 6637 | int i,num_extra_attrs; |
| 6638 | struct dwarf2_section_info *dwo_abbrev_section; |
| 6639 | struct die_info *comp_unit_die; |
| 6640 | |
| 6641 | /* At most one of these may be provided. */ |
| 6642 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); |
| 6643 | |
| 6644 | /* These attributes aren't processed until later: |
| 6645 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. |
| 6646 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
| 6647 | referenced later. However, these attributes are found in the stub |
| 6648 | which we won't have later. In order to not impose this complication |
| 6649 | on the rest of the code, we read them here and copy them to the |
| 6650 | DWO CU/TU die. */ |
| 6651 | |
| 6652 | stmt_list = NULL; |
| 6653 | low_pc = NULL; |
| 6654 | high_pc = NULL; |
| 6655 | ranges = NULL; |
| 6656 | comp_dir = NULL; |
| 6657 | |
| 6658 | if (stub_comp_unit_die != NULL) |
| 6659 | { |
| 6660 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the |
| 6661 | DWO file. */ |
| 6662 | if (! this_cu->is_debug_types) |
| 6663 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); |
| 6664 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); |
| 6665 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); |
| 6666 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); |
| 6667 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); |
| 6668 | |
| 6669 | cu->addr_base = stub_comp_unit_die->addr_base (); |
| 6670 | |
| 6671 | /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute |
| 6672 | here (if needed). We need the value before we can process |
| 6673 | DW_AT_ranges. */ |
| 6674 | cu->ranges_base = stub_comp_unit_die->ranges_base (); |
| 6675 | } |
| 6676 | else if (stub_comp_dir != NULL) |
| 6677 | { |
| 6678 | /* Reconstruct the comp_dir attribute to simplify the code below. */ |
| 6679 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
| 6680 | comp_dir->name = DW_AT_comp_dir; |
| 6681 | comp_dir->form = DW_FORM_string; |
| 6682 | DW_STRING_IS_CANONICAL (comp_dir) = 0; |
| 6683 | DW_STRING (comp_dir) = stub_comp_dir; |
| 6684 | } |
| 6685 | |
| 6686 | /* Set up for reading the DWO CU/TU. */ |
| 6687 | cu->dwo_unit = dwo_unit; |
| 6688 | dwarf2_section_info *section = dwo_unit->section; |
| 6689 | section->read (objfile); |
| 6690 | abfd = section->get_bfd_owner (); |
| 6691 | begin_info_ptr = info_ptr = (section->buffer |
| 6692 | + to_underlying (dwo_unit->sect_off)); |
| 6693 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
| 6694 | |
| 6695 | if (this_cu->is_debug_types) |
| 6696 | { |
| 6697 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
| 6698 | |
| 6699 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 6700 | &cu->header, section, |
| 6701 | dwo_abbrev_section, |
| 6702 | info_ptr, rcuh_kind::TYPE); |
| 6703 | /* This is not an assert because it can be caused by bad debug info. */ |
| 6704 | if (sig_type->signature != cu->header.signature) |
| 6705 | { |
| 6706 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" |
| 6707 | " TU at offset %s [in module %s]"), |
| 6708 | hex_string (sig_type->signature), |
| 6709 | hex_string (cu->header.signature), |
| 6710 | sect_offset_str (dwo_unit->sect_off), |
| 6711 | bfd_get_filename (abfd)); |
| 6712 | } |
| 6713 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
| 6714 | /* For DWOs coming from DWP files, we don't know the CU length |
| 6715 | nor the type's offset in the TU until now. */ |
| 6716 | dwo_unit->length = cu->header.get_length (); |
| 6717 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
| 6718 | |
| 6719 | /* Establish the type offset that can be used to lookup the type. |
| 6720 | For DWO files, we don't know it until now. */ |
| 6721 | sig_type->type_offset_in_section |
| 6722 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); |
| 6723 | } |
| 6724 | else |
| 6725 | { |
| 6726 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 6727 | &cu->header, section, |
| 6728 | dwo_abbrev_section, |
| 6729 | info_ptr, rcuh_kind::COMPILE); |
| 6730 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
| 6731 | /* For DWOs coming from DWP files, we don't know the CU length |
| 6732 | until now. */ |
| 6733 | dwo_unit->length = cu->header.get_length (); |
| 6734 | } |
| 6735 | |
| 6736 | *result_dwo_abbrev_table |
| 6737 | = abbrev_table::read (objfile, dwo_abbrev_section, |
| 6738 | cu->header.abbrev_sect_off); |
| 6739 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
| 6740 | result_dwo_abbrev_table->get ()); |
| 6741 | |
| 6742 | /* Read in the die, but leave space to copy over the attributes |
| 6743 | from the stub. This has the benefit of simplifying the rest of |
| 6744 | the code - all the work to maintain the illusion of a single |
| 6745 | DW_TAG_{compile,type}_unit DIE is done here. */ |
| 6746 | num_extra_attrs = ((stmt_list != NULL) |
| 6747 | + (low_pc != NULL) |
| 6748 | + (high_pc != NULL) |
| 6749 | + (ranges != NULL) |
| 6750 | + (comp_dir != NULL)); |
| 6751 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, |
| 6752 | num_extra_attrs); |
| 6753 | |
| 6754 | /* Copy over the attributes from the stub to the DIE we just read in. */ |
| 6755 | comp_unit_die = *result_comp_unit_die; |
| 6756 | i = comp_unit_die->num_attrs; |
| 6757 | if (stmt_list != NULL) |
| 6758 | comp_unit_die->attrs[i++] = *stmt_list; |
| 6759 | if (low_pc != NULL) |
| 6760 | comp_unit_die->attrs[i++] = *low_pc; |
| 6761 | if (high_pc != NULL) |
| 6762 | comp_unit_die->attrs[i++] = *high_pc; |
| 6763 | if (ranges != NULL) |
| 6764 | comp_unit_die->attrs[i++] = *ranges; |
| 6765 | if (comp_dir != NULL) |
| 6766 | comp_unit_die->attrs[i++] = *comp_dir; |
| 6767 | comp_unit_die->num_attrs += num_extra_attrs; |
| 6768 | |
| 6769 | if (dwarf_die_debug) |
| 6770 | { |
| 6771 | fprintf_unfiltered (gdb_stdlog, |
| 6772 | "Read die from %s@0x%x of %s:\n", |
| 6773 | section->get_name (), |
| 6774 | (unsigned) (begin_info_ptr - section->buffer), |
| 6775 | bfd_get_filename (abfd)); |
| 6776 | dump_die (comp_unit_die, dwarf_die_debug); |
| 6777 | } |
| 6778 | |
| 6779 | /* Skip dummy compilation units. */ |
| 6780 | if (info_ptr >= begin_info_ptr + dwo_unit->length |
| 6781 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 6782 | return 0; |
| 6783 | |
| 6784 | *result_info_ptr = info_ptr; |
| 6785 | return 1; |
| 6786 | } |
| 6787 | |
| 6788 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
| 6789 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the |
| 6790 | signature is part of the header. */ |
| 6791 | static gdb::optional<ULONGEST> |
| 6792 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) |
| 6793 | { |
| 6794 | if (cu->header.version >= 5) |
| 6795 | return cu->header.signature; |
| 6796 | struct attribute *attr; |
| 6797 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); |
| 6798 | if (attr == nullptr) |
| 6799 | return gdb::optional<ULONGEST> (); |
| 6800 | return DW_UNSND (attr); |
| 6801 | } |
| 6802 | |
| 6803 | /* Subroutine of cutu_reader to simplify it. |
| 6804 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
| 6805 | Returns NULL if the specified DWO unit cannot be found. */ |
| 6806 | |
| 6807 | static struct dwo_unit * |
| 6808 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, |
| 6809 | struct die_info *comp_unit_die, |
| 6810 | const char *dwo_name) |
| 6811 | { |
| 6812 | struct dwarf2_cu *cu = this_cu->cu; |
| 6813 | struct dwo_unit *dwo_unit; |
| 6814 | const char *comp_dir; |
| 6815 | |
| 6816 | gdb_assert (cu != NULL); |
| 6817 | |
| 6818 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
| 6819 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
| 6820 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
| 6821 | |
| 6822 | if (this_cu->is_debug_types) |
| 6823 | { |
| 6824 | struct signatured_type *sig_type; |
| 6825 | |
| 6826 | /* Since this_cu is the first member of struct signatured_type, |
| 6827 | we can go from a pointer to one to a pointer to the other. */ |
| 6828 | sig_type = (struct signatured_type *) this_cu; |
| 6829 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
| 6830 | } |
| 6831 | else |
| 6832 | { |
| 6833 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
| 6834 | if (!signature.has_value ()) |
| 6835 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
| 6836 | " [in module %s]"), |
| 6837 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
| 6838 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
| 6839 | *signature); |
| 6840 | } |
| 6841 | |
| 6842 | return dwo_unit; |
| 6843 | } |
| 6844 | |
| 6845 | /* Subroutine of cutu_reader to simplify it. |
| 6846 | See it for a description of the parameters. |
| 6847 | Read a TU directly from a DWO file, bypassing the stub. */ |
| 6848 | |
| 6849 | void |
| 6850 | cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
| 6851 | int use_existing_cu) |
| 6852 | { |
| 6853 | struct signatured_type *sig_type; |
| 6854 | |
| 6855 | /* Verify we can do the following downcast, and that we have the |
| 6856 | data we need. */ |
| 6857 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); |
| 6858 | sig_type = (struct signatured_type *) this_cu; |
| 6859 | gdb_assert (sig_type->dwo_unit != NULL); |
| 6860 | |
| 6861 | if (use_existing_cu && this_cu->cu != NULL) |
| 6862 | { |
| 6863 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); |
| 6864 | /* There's no need to do the rereading_dwo_cu handling that |
| 6865 | cutu_reader does since we don't read the stub. */ |
| 6866 | } |
| 6867 | else |
| 6868 | { |
| 6869 | /* If !use_existing_cu, this_cu->cu must be NULL. */ |
| 6870 | gdb_assert (this_cu->cu == NULL); |
| 6871 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
| 6872 | } |
| 6873 | |
| 6874 | /* A future optimization, if needed, would be to use an existing |
| 6875 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs |
| 6876 | could share abbrev tables. */ |
| 6877 | |
| 6878 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
| 6879 | NULL /* stub_comp_unit_die */, |
| 6880 | sig_type->dwo_unit->dwo_file->comp_dir, |
| 6881 | this, &info_ptr, |
| 6882 | &comp_unit_die, |
| 6883 | &m_dwo_abbrev_table) == 0) |
| 6884 | { |
| 6885 | /* Dummy die. */ |
| 6886 | dummy_p = true; |
| 6887 | } |
| 6888 | } |
| 6889 | |
| 6890 | /* Initialize a CU (or TU) and read its DIEs. |
| 6891 | If the CU defers to a DWO file, read the DWO file as well. |
| 6892 | |
| 6893 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
| 6894 | Otherwise the table specified in the comp unit header is read in and used. |
| 6895 | This is an optimization for when we already have the abbrev table. |
| 6896 | |
| 6897 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
| 6898 | Otherwise, a new CU is allocated with xmalloc. */ |
| 6899 | |
| 6900 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
| 6901 | struct abbrev_table *abbrev_table, |
| 6902 | int use_existing_cu, |
| 6903 | bool skip_partial) |
| 6904 | : die_reader_specs {}, |
| 6905 | m_this_cu (this_cu) |
| 6906 | { |
| 6907 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 6908 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6909 | struct dwarf2_section_info *section = this_cu->section; |
| 6910 | bfd *abfd = section->get_bfd_owner (); |
| 6911 | struct dwarf2_cu *cu; |
| 6912 | const gdb_byte *begin_info_ptr; |
| 6913 | struct signatured_type *sig_type = NULL; |
| 6914 | struct dwarf2_section_info *abbrev_section; |
| 6915 | /* Non-zero if CU currently points to a DWO file and we need to |
| 6916 | reread it. When this happens we need to reread the skeleton die |
| 6917 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
| 6918 | int rereading_dwo_cu = 0; |
| 6919 | |
| 6920 | if (dwarf_die_debug) |
| 6921 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
| 6922 | this_cu->is_debug_types ? "type" : "comp", |
| 6923 | sect_offset_str (this_cu->sect_off)); |
| 6924 | |
| 6925 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
| 6926 | file (instead of going through the stub), short-circuit all of this. */ |
| 6927 | if (this_cu->reading_dwo_directly) |
| 6928 | { |
| 6929 | /* Narrow down the scope of possibilities to have to understand. */ |
| 6930 | gdb_assert (this_cu->is_debug_types); |
| 6931 | gdb_assert (abbrev_table == NULL); |
| 6932 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu); |
| 6933 | return; |
| 6934 | } |
| 6935 | |
| 6936 | /* This is cheap if the section is already read in. */ |
| 6937 | section->read (objfile); |
| 6938 | |
| 6939 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
| 6940 | |
| 6941 | abbrev_section = get_abbrev_section_for_cu (this_cu); |
| 6942 | |
| 6943 | if (use_existing_cu && this_cu->cu != NULL) |
| 6944 | { |
| 6945 | cu = this_cu->cu; |
| 6946 | /* If this CU is from a DWO file we need to start over, we need to |
| 6947 | refetch the attributes from the skeleton CU. |
| 6948 | This could be optimized by retrieving those attributes from when we |
| 6949 | were here the first time: the previous comp_unit_die was stored in |
| 6950 | comp_unit_obstack. But there's no data yet that we need this |
| 6951 | optimization. */ |
| 6952 | if (cu->dwo_unit != NULL) |
| 6953 | rereading_dwo_cu = 1; |
| 6954 | } |
| 6955 | else |
| 6956 | { |
| 6957 | /* If !use_existing_cu, this_cu->cu must be NULL. */ |
| 6958 | gdb_assert (this_cu->cu == NULL); |
| 6959 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
| 6960 | cu = m_new_cu.get (); |
| 6961 | } |
| 6962 | |
| 6963 | /* Get the header. */ |
| 6964 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
| 6965 | { |
| 6966 | /* We already have the header, there's no need to read it in again. */ |
| 6967 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
| 6968 | } |
| 6969 | else |
| 6970 | { |
| 6971 | if (this_cu->is_debug_types) |
| 6972 | { |
| 6973 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 6974 | &cu->header, section, |
| 6975 | abbrev_section, info_ptr, |
| 6976 | rcuh_kind::TYPE); |
| 6977 | |
| 6978 | /* Since per_cu is the first member of struct signatured_type, |
| 6979 | we can go from a pointer to one to a pointer to the other. */ |
| 6980 | sig_type = (struct signatured_type *) this_cu; |
| 6981 | gdb_assert (sig_type->signature == cu->header.signature); |
| 6982 | gdb_assert (sig_type->type_offset_in_tu |
| 6983 | == cu->header.type_cu_offset_in_tu); |
| 6984 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
| 6985 | |
| 6986 | /* LENGTH has not been set yet for type units if we're |
| 6987 | using .gdb_index. */ |
| 6988 | this_cu->length = cu->header.get_length (); |
| 6989 | |
| 6990 | /* Establish the type offset that can be used to lookup the type. */ |
| 6991 | sig_type->type_offset_in_section = |
| 6992 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); |
| 6993 | |
| 6994 | this_cu->dwarf_version = cu->header.version; |
| 6995 | } |
| 6996 | else |
| 6997 | { |
| 6998 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 6999 | &cu->header, section, |
| 7000 | abbrev_section, |
| 7001 | info_ptr, |
| 7002 | rcuh_kind::COMPILE); |
| 7003 | |
| 7004 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
| 7005 | if (this_cu->length == 0) |
| 7006 | this_cu->length = cu->header.get_length (); |
| 7007 | else |
| 7008 | gdb_assert (this_cu->length == cu->header.get_length ()); |
| 7009 | this_cu->dwarf_version = cu->header.version; |
| 7010 | } |
| 7011 | } |
| 7012 | |
| 7013 | /* Skip dummy compilation units. */ |
| 7014 | if (info_ptr >= begin_info_ptr + this_cu->length |
| 7015 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 7016 | { |
| 7017 | dummy_p = true; |
| 7018 | return; |
| 7019 | } |
| 7020 | |
| 7021 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
| 7022 | And if we need to read them now, make sure they're freed when we're |
| 7023 | done. */ |
| 7024 | if (abbrev_table != NULL) |
| 7025 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
| 7026 | else |
| 7027 | { |
| 7028 | m_abbrev_table_holder |
| 7029 | = abbrev_table::read (objfile, abbrev_section, |
| 7030 | cu->header.abbrev_sect_off); |
| 7031 | abbrev_table = m_abbrev_table_holder.get (); |
| 7032 | } |
| 7033 | |
| 7034 | /* Read the top level CU/TU die. */ |
| 7035 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
| 7036 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
| 7037 | |
| 7038 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
| 7039 | { |
| 7040 | dummy_p = true; |
| 7041 | return; |
| 7042 | } |
| 7043 | |
| 7044 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
| 7045 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
| 7046 | table from the DWO file and pass the ownership over to us. It will be |
| 7047 | referenced from READER, so we must make sure to free it after we're done |
| 7048 | with READER. |
| 7049 | |
| 7050 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
| 7051 | DWO CU, that this test will fail (the attribute will not be present). */ |
| 7052 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
| 7053 | if (dwo_name != nullptr) |
| 7054 | { |
| 7055 | struct dwo_unit *dwo_unit; |
| 7056 | struct die_info *dwo_comp_unit_die; |
| 7057 | |
| 7058 | if (comp_unit_die->has_children) |
| 7059 | { |
| 7060 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
| 7061 | " has children (offset %s) [in module %s]"), |
| 7062 | sect_offset_str (this_cu->sect_off), |
| 7063 | bfd_get_filename (abfd)); |
| 7064 | } |
| 7065 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die, dwo_name); |
| 7066 | if (dwo_unit != NULL) |
| 7067 | { |
| 7068 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
| 7069 | comp_unit_die, NULL, |
| 7070 | this, &info_ptr, |
| 7071 | &dwo_comp_unit_die, |
| 7072 | &m_dwo_abbrev_table) == 0) |
| 7073 | { |
| 7074 | /* Dummy die. */ |
| 7075 | dummy_p = true; |
| 7076 | return; |
| 7077 | } |
| 7078 | comp_unit_die = dwo_comp_unit_die; |
| 7079 | } |
| 7080 | else |
| 7081 | { |
| 7082 | /* Yikes, we couldn't find the rest of the DIE, we only have |
| 7083 | the stub. A complaint has already been logged. There's |
| 7084 | not much more we can do except pass on the stub DIE to |
| 7085 | die_reader_func. We don't want to throw an error on bad |
| 7086 | debug info. */ |
| 7087 | } |
| 7088 | } |
| 7089 | } |
| 7090 | |
| 7091 | void |
| 7092 | cutu_reader::keep () |
| 7093 | { |
| 7094 | /* Done, clean up. */ |
| 7095 | gdb_assert (!dummy_p); |
| 7096 | if (m_new_cu != NULL) |
| 7097 | { |
| 7098 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7099 | = m_this_cu->dwarf2_per_objfile; |
| 7100 | /* Link this CU into read_in_chain. */ |
| 7101 | m_this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
| 7102 | dwarf2_per_objfile->read_in_chain = m_this_cu; |
| 7103 | /* The chain owns it now. */ |
| 7104 | m_new_cu.release (); |
| 7105 | } |
| 7106 | } |
| 7107 | |
| 7108 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
| 7109 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is |
| 7110 | assumed to have already done the lookup to find the DWO file). |
| 7111 | |
| 7112 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and |
| 7113 | THIS_CU->is_debug_types, but nothing else. |
| 7114 | |
| 7115 | We fill in THIS_CU->length. |
| 7116 | |
| 7117 | THIS_CU->cu is always freed when done. |
| 7118 | This is done in order to not leave THIS_CU->cu in a state where we have |
| 7119 | to care whether it refers to the "main" CU or the DWO CU. |
| 7120 | |
| 7121 | When parent_cu is passed, it is used to provide a default value for |
| 7122 | str_offsets_base and addr_base from the parent. */ |
| 7123 | |
| 7124 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
| 7125 | struct dwarf2_cu *parent_cu, |
| 7126 | struct dwo_file *dwo_file) |
| 7127 | : die_reader_specs {}, |
| 7128 | m_this_cu (this_cu) |
| 7129 | { |
| 7130 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 7131 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7132 | struct dwarf2_section_info *section = this_cu->section; |
| 7133 | bfd *abfd = section->get_bfd_owner (); |
| 7134 | struct dwarf2_section_info *abbrev_section; |
| 7135 | const gdb_byte *begin_info_ptr, *info_ptr; |
| 7136 | |
| 7137 | if (dwarf_die_debug) |
| 7138 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
| 7139 | this_cu->is_debug_types ? "type" : "comp", |
| 7140 | sect_offset_str (this_cu->sect_off)); |
| 7141 | |
| 7142 | gdb_assert (this_cu->cu == NULL); |
| 7143 | |
| 7144 | abbrev_section = (dwo_file != NULL |
| 7145 | ? &dwo_file->sections.abbrev |
| 7146 | : get_abbrev_section_for_cu (this_cu)); |
| 7147 | |
| 7148 | /* This is cheap if the section is already read in. */ |
| 7149 | section->read (objfile); |
| 7150 | |
| 7151 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
| 7152 | |
| 7153 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
| 7154 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 7155 | &m_new_cu->header, section, |
| 7156 | abbrev_section, info_ptr, |
| 7157 | (this_cu->is_debug_types |
| 7158 | ? rcuh_kind::TYPE |
| 7159 | : rcuh_kind::COMPILE)); |
| 7160 | |
| 7161 | if (parent_cu != nullptr) |
| 7162 | { |
| 7163 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
| 7164 | m_new_cu->addr_base = parent_cu->addr_base; |
| 7165 | } |
| 7166 | this_cu->length = m_new_cu->header.get_length (); |
| 7167 | |
| 7168 | /* Skip dummy compilation units. */ |
| 7169 | if (info_ptr >= begin_info_ptr + this_cu->length |
| 7170 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 7171 | { |
| 7172 | dummy_p = true; |
| 7173 | return; |
| 7174 | } |
| 7175 | |
| 7176 | m_abbrev_table_holder |
| 7177 | = abbrev_table::read (objfile, abbrev_section, |
| 7178 | m_new_cu->header.abbrev_sect_off); |
| 7179 | |
| 7180 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
| 7181 | m_abbrev_table_holder.get ()); |
| 7182 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
| 7183 | } |
| 7184 | |
| 7185 | \f |
| 7186 | /* Type Unit Groups. |
| 7187 | |
| 7188 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
| 7189 | a more manageable set. The grouping is done by DW_AT_stmt_list entry |
| 7190 | so that all types coming from the same compilation (.o file) are grouped |
| 7191 | together. A future step could be to put the types in the same symtab as |
| 7192 | the CU the types ultimately came from. */ |
| 7193 | |
| 7194 | static hashval_t |
| 7195 | hash_type_unit_group (const void *item) |
| 7196 | { |
| 7197 | const struct type_unit_group *tu_group |
| 7198 | = (const struct type_unit_group *) item; |
| 7199 | |
| 7200 | return hash_stmt_list_entry (&tu_group->hash); |
| 7201 | } |
| 7202 | |
| 7203 | static int |
| 7204 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
| 7205 | { |
| 7206 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
| 7207 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; |
| 7208 | |
| 7209 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
| 7210 | } |
| 7211 | |
| 7212 | /* Allocate a hash table for type unit groups. */ |
| 7213 | |
| 7214 | static htab_up |
| 7215 | allocate_type_unit_groups_table () |
| 7216 | { |
| 7217 | return htab_up (htab_create_alloc (3, |
| 7218 | hash_type_unit_group, |
| 7219 | eq_type_unit_group, |
| 7220 | NULL, xcalloc, xfree)); |
| 7221 | } |
| 7222 | |
| 7223 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
| 7224 | partial symtabs. We combine several TUs per psymtab to not let the size |
| 7225 | of any one psymtab grow too big. */ |
| 7226 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) |
| 7227 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 |
| 7228 | |
| 7229 | /* Helper routine for get_type_unit_group. |
| 7230 | Create the type_unit_group object used to hold one or more TUs. */ |
| 7231 | |
| 7232 | static struct type_unit_group * |
| 7233 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
| 7234 | { |
| 7235 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7236 | = cu->per_cu->dwarf2_per_objfile; |
| 7237 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7238 | struct dwarf2_per_cu_data *per_cu; |
| 7239 | struct type_unit_group *tu_group; |
| 7240 | |
| 7241 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7242 | struct type_unit_group); |
| 7243 | per_cu = &tu_group->per_cu; |
| 7244 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 7245 | |
| 7246 | if (dwarf2_per_objfile->using_index) |
| 7247 | { |
| 7248 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7249 | struct dwarf2_per_cu_quick_data); |
| 7250 | } |
| 7251 | else |
| 7252 | { |
| 7253 | unsigned int line_offset = to_underlying (line_offset_struct); |
| 7254 | dwarf2_psymtab *pst; |
| 7255 | std::string name; |
| 7256 | |
| 7257 | /* Give the symtab a useful name for debug purposes. */ |
| 7258 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) |
| 7259 | name = string_printf ("<type_units_%d>", |
| 7260 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); |
| 7261 | else |
| 7262 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
| 7263 | |
| 7264 | pst = create_partial_symtab (per_cu, name.c_str ()); |
| 7265 | pst->anonymous = true; |
| 7266 | } |
| 7267 | |
| 7268 | tu_group->hash.dwo_unit = cu->dwo_unit; |
| 7269 | tu_group->hash.line_sect_off = line_offset_struct; |
| 7270 | |
| 7271 | return tu_group; |
| 7272 | } |
| 7273 | |
| 7274 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
| 7275 | STMT_LIST is a DW_AT_stmt_list attribute. */ |
| 7276 | |
| 7277 | static struct type_unit_group * |
| 7278 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
| 7279 | { |
| 7280 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7281 | = cu->per_cu->dwarf2_per_objfile; |
| 7282 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 7283 | struct type_unit_group *tu_group; |
| 7284 | void **slot; |
| 7285 | unsigned int line_offset; |
| 7286 | struct type_unit_group type_unit_group_for_lookup; |
| 7287 | |
| 7288 | if (dwarf2_per_objfile->type_unit_groups == NULL) |
| 7289 | dwarf2_per_objfile->type_unit_groups = allocate_type_unit_groups_table (); |
| 7290 | |
| 7291 | /* Do we need to create a new group, or can we use an existing one? */ |
| 7292 | |
| 7293 | if (stmt_list) |
| 7294 | { |
| 7295 | line_offset = DW_UNSND (stmt_list); |
| 7296 | ++tu_stats->nr_symtab_sharers; |
| 7297 | } |
| 7298 | else |
| 7299 | { |
| 7300 | /* Ugh, no stmt_list. Rare, but we have to handle it. |
| 7301 | We can do various things here like create one group per TU or |
| 7302 | spread them over multiple groups to split up the expansion work. |
| 7303 | To avoid worst case scenarios (too many groups or too large groups) |
| 7304 | we, umm, group them in bunches. */ |
| 7305 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB |
| 7306 | | (tu_stats->nr_stmt_less_type_units |
| 7307 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); |
| 7308 | ++tu_stats->nr_stmt_less_type_units; |
| 7309 | } |
| 7310 | |
| 7311 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
| 7312 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
| 7313 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups.get (), |
| 7314 | &type_unit_group_for_lookup, INSERT); |
| 7315 | if (*slot != NULL) |
| 7316 | { |
| 7317 | tu_group = (struct type_unit_group *) *slot; |
| 7318 | gdb_assert (tu_group != NULL); |
| 7319 | } |
| 7320 | else |
| 7321 | { |
| 7322 | sect_offset line_offset_struct = (sect_offset) line_offset; |
| 7323 | tu_group = create_type_unit_group (cu, line_offset_struct); |
| 7324 | *slot = tu_group; |
| 7325 | ++tu_stats->nr_symtabs; |
| 7326 | } |
| 7327 | |
| 7328 | return tu_group; |
| 7329 | } |
| 7330 | \f |
| 7331 | /* Partial symbol tables. */ |
| 7332 | |
| 7333 | /* Create a psymtab named NAME and assign it to PER_CU. |
| 7334 | |
| 7335 | The caller must fill in the following details: |
| 7336 | dirname, textlow, texthigh. */ |
| 7337 | |
| 7338 | static dwarf2_psymtab * |
| 7339 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
| 7340 | { |
| 7341 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 7342 | dwarf2_psymtab *pst; |
| 7343 | |
| 7344 | pst = new dwarf2_psymtab (name, objfile, per_cu); |
| 7345 | |
| 7346 | pst->psymtabs_addrmap_supported = true; |
| 7347 | |
| 7348 | /* This is the glue that links PST into GDB's symbol API. */ |
| 7349 | per_cu->v.psymtab = pst; |
| 7350 | |
| 7351 | return pst; |
| 7352 | } |
| 7353 | |
| 7354 | /* DIE reader function for process_psymtab_comp_unit. */ |
| 7355 | |
| 7356 | static void |
| 7357 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, |
| 7358 | const gdb_byte *info_ptr, |
| 7359 | struct die_info *comp_unit_die, |
| 7360 | enum language pretend_language) |
| 7361 | { |
| 7362 | struct dwarf2_cu *cu = reader->cu; |
| 7363 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 7364 | struct gdbarch *gdbarch = objfile->arch (); |
| 7365 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
| 7366 | CORE_ADDR baseaddr; |
| 7367 | CORE_ADDR best_lowpc = 0, best_highpc = 0; |
| 7368 | dwarf2_psymtab *pst; |
| 7369 | enum pc_bounds_kind cu_bounds_kind; |
| 7370 | const char *filename; |
| 7371 | |
| 7372 | gdb_assert (! per_cu->is_debug_types); |
| 7373 | |
| 7374 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
| 7375 | |
| 7376 | /* Allocate a new partial symbol table structure. */ |
| 7377 | gdb::unique_xmalloc_ptr<char> debug_filename; |
| 7378 | static const char artificial[] = "<artificial>"; |
| 7379 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
| 7380 | if (filename == NULL) |
| 7381 | filename = ""; |
| 7382 | else if (strcmp (filename, artificial) == 0) |
| 7383 | { |
| 7384 | debug_filename.reset (concat (artificial, "@", |
| 7385 | sect_offset_str (per_cu->sect_off), |
| 7386 | (char *) NULL)); |
| 7387 | filename = debug_filename.get (); |
| 7388 | } |
| 7389 | |
| 7390 | pst = create_partial_symtab (per_cu, filename); |
| 7391 | |
| 7392 | /* This must be done before calling dwarf2_build_include_psymtabs. */ |
| 7393 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
| 7394 | |
| 7395 | baseaddr = objfile->text_section_offset (); |
| 7396 | |
| 7397 | dwarf2_find_base_address (comp_unit_die, cu); |
| 7398 | |
| 7399 | /* Possibly set the default values of LOWPC and HIGHPC from |
| 7400 | `DW_AT_ranges'. */ |
| 7401 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
| 7402 | &best_highpc, cu, pst); |
| 7403 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) |
| 7404 | { |
| 7405 | CORE_ADDR low |
| 7406 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) |
| 7407 | - baseaddr); |
| 7408 | CORE_ADDR high |
| 7409 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) |
| 7410 | - baseaddr - 1); |
| 7411 | /* Store the contiguous range if it is not empty; it can be |
| 7412 | empty for CUs with no code. */ |
| 7413 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
| 7414 | low, high, pst); |
| 7415 | } |
| 7416 | |
| 7417 | /* Check if comp unit has_children. |
| 7418 | If so, read the rest of the partial symbols from this comp unit. |
| 7419 | If not, there's no more debug_info for this comp unit. */ |
| 7420 | if (comp_unit_die->has_children) |
| 7421 | { |
| 7422 | struct partial_die_info *first_die; |
| 7423 | CORE_ADDR lowpc, highpc; |
| 7424 | |
| 7425 | lowpc = ((CORE_ADDR) -1); |
| 7426 | highpc = ((CORE_ADDR) 0); |
| 7427 | |
| 7428 | first_die = load_partial_dies (reader, info_ptr, 1); |
| 7429 | |
| 7430 | scan_partial_symbols (first_die, &lowpc, &highpc, |
| 7431 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
| 7432 | |
| 7433 | /* If we didn't find a lowpc, set it to highpc to avoid |
| 7434 | complaints from `maint check'. */ |
| 7435 | if (lowpc == ((CORE_ADDR) -1)) |
| 7436 | lowpc = highpc; |
| 7437 | |
| 7438 | /* If the compilation unit didn't have an explicit address range, |
| 7439 | then use the information extracted from its child dies. */ |
| 7440 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
| 7441 | { |
| 7442 | best_lowpc = lowpc; |
| 7443 | best_highpc = highpc; |
| 7444 | } |
| 7445 | } |
| 7446 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 7447 | best_lowpc + baseaddr) |
| 7448 | - baseaddr); |
| 7449 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 7450 | best_highpc + baseaddr) |
| 7451 | - baseaddr); |
| 7452 | |
| 7453 | end_psymtab_common (objfile, pst); |
| 7454 | |
| 7455 | if (!cu->per_cu->imported_symtabs_empty ()) |
| 7456 | { |
| 7457 | int i; |
| 7458 | int len = cu->per_cu->imported_symtabs_size (); |
| 7459 | |
| 7460 | /* Fill in 'dependencies' here; we fill in 'users' in a |
| 7461 | post-pass. */ |
| 7462 | pst->number_of_dependencies = len; |
| 7463 | pst->dependencies |
| 7464 | = objfile->partial_symtabs->allocate_dependencies (len); |
| 7465 | for (i = 0; i < len; ++i) |
| 7466 | { |
| 7467 | pst->dependencies[i] |
| 7468 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; |
| 7469 | } |
| 7470 | |
| 7471 | cu->per_cu->imported_symtabs_free (); |
| 7472 | } |
| 7473 | |
| 7474 | /* Get the list of files included in the current compilation unit, |
| 7475 | and build a psymtab for each of them. */ |
| 7476 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); |
| 7477 | |
| 7478 | if (dwarf_read_debug) |
| 7479 | fprintf_unfiltered (gdb_stdlog, |
| 7480 | "Psymtab for %s unit @%s: %s - %s" |
| 7481 | ", %d global, %d static syms\n", |
| 7482 | per_cu->is_debug_types ? "type" : "comp", |
| 7483 | sect_offset_str (per_cu->sect_off), |
| 7484 | paddress (gdbarch, pst->text_low (objfile)), |
| 7485 | paddress (gdbarch, pst->text_high (objfile)), |
| 7486 | pst->n_global_syms, pst->n_static_syms); |
| 7487 | } |
| 7488 | |
| 7489 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
| 7490 | Process compilation unit THIS_CU for a psymtab. */ |
| 7491 | |
| 7492 | static void |
| 7493 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 7494 | bool want_partial_unit, |
| 7495 | enum language pretend_language) |
| 7496 | { |
| 7497 | /* If this compilation unit was already read in, free the |
| 7498 | cached copy in order to read it in again. This is |
| 7499 | necessary because we skipped some symbols when we first |
| 7500 | read in the compilation unit (see load_partial_dies). |
| 7501 | This problem could be avoided, but the benefit is unclear. */ |
| 7502 | if (this_cu->cu != NULL) |
| 7503 | free_one_cached_comp_unit (this_cu); |
| 7504 | |
| 7505 | cutu_reader reader (this_cu, NULL, 0, false); |
| 7506 | |
| 7507 | switch (reader.comp_unit_die->tag) |
| 7508 | { |
| 7509 | case DW_TAG_compile_unit: |
| 7510 | this_cu->unit_type = DW_UT_compile; |
| 7511 | break; |
| 7512 | case DW_TAG_partial_unit: |
| 7513 | this_cu->unit_type = DW_UT_partial; |
| 7514 | break; |
| 7515 | default: |
| 7516 | abort (); |
| 7517 | } |
| 7518 | |
| 7519 | if (reader.dummy_p) |
| 7520 | { |
| 7521 | /* Nothing. */ |
| 7522 | } |
| 7523 | else if (this_cu->is_debug_types) |
| 7524 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
| 7525 | reader.comp_unit_die); |
| 7526 | else if (want_partial_unit |
| 7527 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) |
| 7528 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
| 7529 | reader.comp_unit_die, |
| 7530 | pretend_language); |
| 7531 | |
| 7532 | this_cu->lang = this_cu->cu->language; |
| 7533 | |
| 7534 | /* Age out any secondary CUs. */ |
| 7535 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
| 7536 | } |
| 7537 | |
| 7538 | /* Reader function for build_type_psymtabs. */ |
| 7539 | |
| 7540 | static void |
| 7541 | build_type_psymtabs_reader (const struct die_reader_specs *reader, |
| 7542 | const gdb_byte *info_ptr, |
| 7543 | struct die_info *type_unit_die) |
| 7544 | { |
| 7545 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7546 | = reader->cu->per_cu->dwarf2_per_objfile; |
| 7547 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7548 | struct dwarf2_cu *cu = reader->cu; |
| 7549 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
| 7550 | struct signatured_type *sig_type; |
| 7551 | struct type_unit_group *tu_group; |
| 7552 | struct attribute *attr; |
| 7553 | struct partial_die_info *first_die; |
| 7554 | CORE_ADDR lowpc, highpc; |
| 7555 | dwarf2_psymtab *pst; |
| 7556 | |
| 7557 | gdb_assert (per_cu->is_debug_types); |
| 7558 | sig_type = (struct signatured_type *) per_cu; |
| 7559 | |
| 7560 | if (! type_unit_die->has_children) |
| 7561 | return; |
| 7562 | |
| 7563 | attr = type_unit_die->attr (DW_AT_stmt_list); |
| 7564 | tu_group = get_type_unit_group (cu, attr); |
| 7565 | |
| 7566 | if (tu_group->tus == nullptr) |
| 7567 | tu_group->tus = new std::vector<signatured_type *>; |
| 7568 | tu_group->tus->push_back (sig_type); |
| 7569 | |
| 7570 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); |
| 7571 | pst = create_partial_symtab (per_cu, ""); |
| 7572 | pst->anonymous = true; |
| 7573 | |
| 7574 | first_die = load_partial_dies (reader, info_ptr, 1); |
| 7575 | |
| 7576 | lowpc = (CORE_ADDR) -1; |
| 7577 | highpc = (CORE_ADDR) 0; |
| 7578 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); |
| 7579 | |
| 7580 | end_psymtab_common (objfile, pst); |
| 7581 | } |
| 7582 | |
| 7583 | /* Struct used to sort TUs by their abbreviation table offset. */ |
| 7584 | |
| 7585 | struct tu_abbrev_offset |
| 7586 | { |
| 7587 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
| 7588 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) |
| 7589 | {} |
| 7590 | |
| 7591 | signatured_type *sig_type; |
| 7592 | sect_offset abbrev_offset; |
| 7593 | }; |
| 7594 | |
| 7595 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
| 7596 | |
| 7597 | static bool |
| 7598 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, |
| 7599 | const struct tu_abbrev_offset &b) |
| 7600 | { |
| 7601 | return a.abbrev_offset < b.abbrev_offset; |
| 7602 | } |
| 7603 | |
| 7604 | /* Efficiently read all the type units. |
| 7605 | This does the bulk of the work for build_type_psymtabs. |
| 7606 | |
| 7607 | The efficiency is because we sort TUs by the abbrev table they use and |
| 7608 | only read each abbrev table once. In one program there are 200K TUs |
| 7609 | sharing 8K abbrev tables. |
| 7610 | |
| 7611 | The main purpose of this function is to support building the |
| 7612 | dwarf2_per_objfile->type_unit_groups table. |
| 7613 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we |
| 7614 | can collapse the search space by grouping them by stmt_list. |
| 7615 | The savings can be significant, in the same program from above the 200K TUs |
| 7616 | share 8K stmt_list tables. |
| 7617 | |
| 7618 | FUNC is expected to call get_type_unit_group, which will create the |
| 7619 | struct type_unit_group if necessary and add it to |
| 7620 | dwarf2_per_objfile->type_unit_groups. */ |
| 7621 | |
| 7622 | static void |
| 7623 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7624 | { |
| 7625 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 7626 | abbrev_table_up abbrev_table; |
| 7627 | sect_offset abbrev_offset; |
| 7628 | |
| 7629 | /* It's up to the caller to not call us multiple times. */ |
| 7630 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); |
| 7631 | |
| 7632 | if (dwarf2_per_objfile->all_type_units.empty ()) |
| 7633 | return; |
| 7634 | |
| 7635 | /* TUs typically share abbrev tables, and there can be way more TUs than |
| 7636 | abbrev tables. Sort by abbrev table to reduce the number of times we |
| 7637 | read each abbrev table in. |
| 7638 | Alternatives are to punt or to maintain a cache of abbrev tables. |
| 7639 | This is simpler and efficient enough for now. |
| 7640 | |
| 7641 | Later we group TUs by their DW_AT_stmt_list value (as this defines the |
| 7642 | symtab to use). Typically TUs with the same abbrev offset have the same |
| 7643 | stmt_list value too so in practice this should work well. |
| 7644 | |
| 7645 | The basic algorithm here is: |
| 7646 | |
| 7647 | sort TUs by abbrev table |
| 7648 | for each TU with same abbrev table: |
| 7649 | read abbrev table if first user |
| 7650 | read TU top level DIE |
| 7651 | [IWBN if DWO skeletons had DW_AT_stmt_list] |
| 7652 | call FUNC */ |
| 7653 | |
| 7654 | if (dwarf_read_debug) |
| 7655 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
| 7656 | |
| 7657 | /* Sort in a separate table to maintain the order of all_type_units |
| 7658 | for .gdb_index: TU indices directly index all_type_units. */ |
| 7659 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
| 7660 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); |
| 7661 | |
| 7662 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) |
| 7663 | sorted_by_abbrev.emplace_back |
| 7664 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, |
| 7665 | sig_type->per_cu.section, |
| 7666 | sig_type->per_cu.sect_off)); |
| 7667 | |
| 7668 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
| 7669 | sort_tu_by_abbrev_offset); |
| 7670 | |
| 7671 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
| 7672 | |
| 7673 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
| 7674 | { |
| 7675 | /* Switch to the next abbrev table if necessary. */ |
| 7676 | if (abbrev_table == NULL |
| 7677 | || tu.abbrev_offset != abbrev_offset) |
| 7678 | { |
| 7679 | abbrev_offset = tu.abbrev_offset; |
| 7680 | abbrev_table = |
| 7681 | abbrev_table::read (dwarf2_per_objfile->objfile, |
| 7682 | &dwarf2_per_objfile->abbrev, |
| 7683 | abbrev_offset); |
| 7684 | ++tu_stats->nr_uniq_abbrev_tables; |
| 7685 | } |
| 7686 | |
| 7687 | cutu_reader reader (&tu.sig_type->per_cu, abbrev_table.get (), |
| 7688 | 0, false); |
| 7689 | if (!reader.dummy_p) |
| 7690 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
| 7691 | reader.comp_unit_die); |
| 7692 | } |
| 7693 | } |
| 7694 | |
| 7695 | /* Print collected type unit statistics. */ |
| 7696 | |
| 7697 | static void |
| 7698 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7699 | { |
| 7700 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 7701 | |
| 7702 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); |
| 7703 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
| 7704 | dwarf2_per_objfile->all_type_units.size ()); |
| 7705 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
| 7706 | tu_stats->nr_uniq_abbrev_tables); |
| 7707 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", |
| 7708 | tu_stats->nr_symtabs); |
| 7709 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", |
| 7710 | tu_stats->nr_symtab_sharers); |
| 7711 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", |
| 7712 | tu_stats->nr_stmt_less_type_units); |
| 7713 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", |
| 7714 | tu_stats->nr_all_type_units_reallocs); |
| 7715 | } |
| 7716 | |
| 7717 | /* Traversal function for build_type_psymtabs. */ |
| 7718 | |
| 7719 | static int |
| 7720 | build_type_psymtab_dependencies (void **slot, void *info) |
| 7721 | { |
| 7722 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7723 | = (struct dwarf2_per_objfile *) info; |
| 7724 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7725 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; |
| 7726 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
| 7727 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
| 7728 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
| 7729 | int i; |
| 7730 | |
| 7731 | gdb_assert (len > 0); |
| 7732 | gdb_assert (per_cu->type_unit_group_p ()); |
| 7733 | |
| 7734 | pst->number_of_dependencies = len; |
| 7735 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
| 7736 | for (i = 0; i < len; ++i) |
| 7737 | { |
| 7738 | struct signatured_type *iter = tu_group->tus->at (i); |
| 7739 | gdb_assert (iter->per_cu.is_debug_types); |
| 7740 | pst->dependencies[i] = iter->per_cu.v.psymtab; |
| 7741 | iter->type_unit_group = tu_group; |
| 7742 | } |
| 7743 | |
| 7744 | delete tu_group->tus; |
| 7745 | tu_group->tus = nullptr; |
| 7746 | |
| 7747 | return 1; |
| 7748 | } |
| 7749 | |
| 7750 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
| 7751 | Build partial symbol tables for the .debug_types comp-units. */ |
| 7752 | |
| 7753 | static void |
| 7754 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7755 | { |
| 7756 | if (! create_all_type_units (dwarf2_per_objfile)) |
| 7757 | return; |
| 7758 | |
| 7759 | build_type_psymtabs_1 (dwarf2_per_objfile); |
| 7760 | } |
| 7761 | |
| 7762 | /* Traversal function for process_skeletonless_type_unit. |
| 7763 | Read a TU in a DWO file and build partial symbols for it. */ |
| 7764 | |
| 7765 | static int |
| 7766 | process_skeletonless_type_unit (void **slot, void *info) |
| 7767 | { |
| 7768 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; |
| 7769 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7770 | = (struct dwarf2_per_objfile *) info; |
| 7771 | struct signatured_type find_entry, *entry; |
| 7772 | |
| 7773 | /* If this TU doesn't exist in the global table, add it and read it in. */ |
| 7774 | |
| 7775 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 7776 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
| 7777 | |
| 7778 | find_entry.signature = dwo_unit->signature; |
| 7779 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
| 7780 | &find_entry, INSERT); |
| 7781 | /* If we've already seen this type there's nothing to do. What's happening |
| 7782 | is we're doing our own version of comdat-folding here. */ |
| 7783 | if (*slot != NULL) |
| 7784 | return 1; |
| 7785 | |
| 7786 | /* This does the job that create_all_type_units would have done for |
| 7787 | this TU. */ |
| 7788 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
| 7789 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); |
| 7790 | *slot = entry; |
| 7791 | |
| 7792 | /* This does the job that build_type_psymtabs_1 would have done. */ |
| 7793 | cutu_reader reader (&entry->per_cu, NULL, 0, false); |
| 7794 | if (!reader.dummy_p) |
| 7795 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
| 7796 | reader.comp_unit_die); |
| 7797 | |
| 7798 | return 1; |
| 7799 | } |
| 7800 | |
| 7801 | /* Traversal function for process_skeletonless_type_units. */ |
| 7802 | |
| 7803 | static int |
| 7804 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) |
| 7805 | { |
| 7806 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; |
| 7807 | |
| 7808 | if (dwo_file->tus != NULL) |
| 7809 | htab_traverse_noresize (dwo_file->tus.get (), |
| 7810 | process_skeletonless_type_unit, info); |
| 7811 | |
| 7812 | return 1; |
| 7813 | } |
| 7814 | |
| 7815 | /* Scan all TUs of DWO files, verifying we've processed them. |
| 7816 | This is needed in case a TU was emitted without its skeleton. |
| 7817 | Note: This can't be done until we know what all the DWO files are. */ |
| 7818 | |
| 7819 | static void |
| 7820 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7821 | { |
| 7822 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ |
| 7823 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
| 7824 | && dwarf2_per_objfile->dwo_files != NULL) |
| 7825 | { |
| 7826 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
| 7827 | process_dwo_file_for_skeletonless_type_units, |
| 7828 | dwarf2_per_objfile); |
| 7829 | } |
| 7830 | } |
| 7831 | |
| 7832 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
| 7833 | |
| 7834 | static void |
| 7835 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7836 | { |
| 7837 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 7838 | { |
| 7839 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
| 7840 | |
| 7841 | if (pst == NULL) |
| 7842 | continue; |
| 7843 | |
| 7844 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
| 7845 | { |
| 7846 | /* Set the 'user' field only if it is not already set. */ |
| 7847 | if (pst->dependencies[j]->user == NULL) |
| 7848 | pst->dependencies[j]->user = pst; |
| 7849 | } |
| 7850 | } |
| 7851 | } |
| 7852 | |
| 7853 | /* Build the partial symbol table by doing a quick pass through the |
| 7854 | .debug_info and .debug_abbrev sections. */ |
| 7855 | |
| 7856 | static void |
| 7857 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7858 | { |
| 7859 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7860 | |
| 7861 | if (dwarf_read_debug) |
| 7862 | { |
| 7863 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", |
| 7864 | objfile_name (objfile)); |
| 7865 | } |
| 7866 | |
| 7867 | scoped_restore restore_reading_psyms |
| 7868 | = make_scoped_restore (&dwarf2_per_objfile->reading_partial_symbols, |
| 7869 | true); |
| 7870 | |
| 7871 | dwarf2_per_objfile->info.read (objfile); |
| 7872 | |
| 7873 | /* Any cached compilation units will be linked by the per-objfile |
| 7874 | read_in_chain. Make sure to free them when we're done. */ |
| 7875 | free_cached_comp_units freer (dwarf2_per_objfile); |
| 7876 | |
| 7877 | build_type_psymtabs (dwarf2_per_objfile); |
| 7878 | |
| 7879 | create_all_comp_units (dwarf2_per_objfile); |
| 7880 | |
| 7881 | /* Create a temporary address map on a temporary obstack. We later |
| 7882 | copy this to the final obstack. */ |
| 7883 | auto_obstack temp_obstack; |
| 7884 | |
| 7885 | scoped_restore save_psymtabs_addrmap |
| 7886 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
| 7887 | addrmap_create_mutable (&temp_obstack)); |
| 7888 | |
| 7889 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
| 7890 | { |
| 7891 | if (per_cu->v.psymtab != NULL) |
| 7892 | /* In case a forward DW_TAG_imported_unit has read the CU already. */ |
| 7893 | continue; |
| 7894 | process_psymtab_comp_unit (per_cu, false, language_minimal); |
| 7895 | } |
| 7896 | |
| 7897 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
| 7898 | process_skeletonless_type_units (dwarf2_per_objfile); |
| 7899 | |
| 7900 | /* Now that all TUs have been processed we can fill in the dependencies. */ |
| 7901 | if (dwarf2_per_objfile->type_unit_groups != NULL) |
| 7902 | { |
| 7903 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups.get (), |
| 7904 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
| 7905 | } |
| 7906 | |
| 7907 | if (dwarf_read_debug) |
| 7908 | print_tu_stats (dwarf2_per_objfile); |
| 7909 | |
| 7910 | set_partial_user (dwarf2_per_objfile); |
| 7911 | |
| 7912 | objfile->partial_symtabs->psymtabs_addrmap |
| 7913 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, |
| 7914 | objfile->partial_symtabs->obstack ()); |
| 7915 | /* At this point we want to keep the address map. */ |
| 7916 | save_psymtabs_addrmap.release (); |
| 7917 | |
| 7918 | if (dwarf_read_debug) |
| 7919 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
| 7920 | objfile_name (objfile)); |
| 7921 | } |
| 7922 | |
| 7923 | /* Load the partial DIEs for a secondary CU into memory. |
| 7924 | This is also used when rereading a primary CU with load_all_dies. */ |
| 7925 | |
| 7926 | static void |
| 7927 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) |
| 7928 | { |
| 7929 | cutu_reader reader (this_cu, NULL, 1, false); |
| 7930 | |
| 7931 | if (!reader.dummy_p) |
| 7932 | { |
| 7933 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, |
| 7934 | language_minimal); |
| 7935 | |
| 7936 | /* Check if comp unit has_children. |
| 7937 | If so, read the rest of the partial symbols from this comp unit. |
| 7938 | If not, there's no more debug_info for this comp unit. */ |
| 7939 | if (reader.comp_unit_die->has_children) |
| 7940 | load_partial_dies (&reader, reader.info_ptr, 0); |
| 7941 | |
| 7942 | reader.keep (); |
| 7943 | } |
| 7944 | } |
| 7945 | |
| 7946 | static void |
| 7947 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 7948 | struct dwarf2_section_info *section, |
| 7949 | struct dwarf2_section_info *abbrev_section, |
| 7950 | unsigned int is_dwz) |
| 7951 | { |
| 7952 | const gdb_byte *info_ptr; |
| 7953 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7954 | |
| 7955 | if (dwarf_read_debug) |
| 7956 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
| 7957 | section->get_name (), |
| 7958 | section->get_file_name ()); |
| 7959 | |
| 7960 | section->read (objfile); |
| 7961 | |
| 7962 | info_ptr = section->buffer; |
| 7963 | |
| 7964 | while (info_ptr < section->buffer + section->size) |
| 7965 | { |
| 7966 | struct dwarf2_per_cu_data *this_cu; |
| 7967 | |
| 7968 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
| 7969 | |
| 7970 | comp_unit_head cu_header; |
| 7971 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
| 7972 | abbrev_section, info_ptr, |
| 7973 | rcuh_kind::COMPILE); |
| 7974 | |
| 7975 | /* Save the compilation unit for later lookup. */ |
| 7976 | if (cu_header.unit_type != DW_UT_type) |
| 7977 | { |
| 7978 | this_cu = XOBNEW (&objfile->objfile_obstack, |
| 7979 | struct dwarf2_per_cu_data); |
| 7980 | memset (this_cu, 0, sizeof (*this_cu)); |
| 7981 | } |
| 7982 | else |
| 7983 | { |
| 7984 | auto sig_type = XOBNEW (&objfile->objfile_obstack, |
| 7985 | struct signatured_type); |
| 7986 | memset (sig_type, 0, sizeof (*sig_type)); |
| 7987 | sig_type->signature = cu_header.signature; |
| 7988 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; |
| 7989 | this_cu = &sig_type->per_cu; |
| 7990 | } |
| 7991 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); |
| 7992 | this_cu->sect_off = sect_off; |
| 7993 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
| 7994 | this_cu->is_dwz = is_dwz; |
| 7995 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 7996 | this_cu->section = section; |
| 7997 | |
| 7998 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
| 7999 | |
| 8000 | info_ptr = info_ptr + this_cu->length; |
| 8001 | } |
| 8002 | } |
| 8003 | |
| 8004 | /* Create a list of all compilation units in OBJFILE. |
| 8005 | This is only done for -readnow and building partial symtabs. */ |
| 8006 | |
| 8007 | static void |
| 8008 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8009 | { |
| 8010 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
| 8011 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
| 8012 | &dwarf2_per_objfile->abbrev, 0); |
| 8013 | |
| 8014 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 8015 | if (dwz != NULL) |
| 8016 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
| 8017 | 1); |
| 8018 | } |
| 8019 | |
| 8020 | /* Process all loaded DIEs for compilation unit CU, starting at |
| 8021 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
| 8022 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
| 8023 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
| 8024 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ |
| 8025 | |
| 8026 | static void |
| 8027 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, |
| 8028 | CORE_ADDR *highpc, int set_addrmap, |
| 8029 | struct dwarf2_cu *cu) |
| 8030 | { |
| 8031 | struct partial_die_info *pdi; |
| 8032 | |
| 8033 | /* Now, march along the PDI's, descending into ones which have |
| 8034 | interesting children but skipping the children of the other ones, |
| 8035 | until we reach the end of the compilation unit. */ |
| 8036 | |
| 8037 | pdi = first_die; |
| 8038 | |
| 8039 | while (pdi != NULL) |
| 8040 | { |
| 8041 | pdi->fixup (cu); |
| 8042 | |
| 8043 | /* Anonymous namespaces or modules have no name but have interesting |
| 8044 | children, so we need to look at them. Ditto for anonymous |
| 8045 | enums. */ |
| 8046 | |
| 8047 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
| 8048 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
| 8049 | || pdi->tag == DW_TAG_imported_unit |
| 8050 | || pdi->tag == DW_TAG_inlined_subroutine) |
| 8051 | { |
| 8052 | switch (pdi->tag) |
| 8053 | { |
| 8054 | case DW_TAG_subprogram: |
| 8055 | case DW_TAG_inlined_subroutine: |
| 8056 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
| 8057 | break; |
| 8058 | case DW_TAG_constant: |
| 8059 | case DW_TAG_variable: |
| 8060 | case DW_TAG_typedef: |
| 8061 | case DW_TAG_union_type: |
| 8062 | if (!pdi->is_declaration |
| 8063 | || (pdi->tag == DW_TAG_variable && pdi->is_external)) |
| 8064 | { |
| 8065 | add_partial_symbol (pdi, cu); |
| 8066 | } |
| 8067 | break; |
| 8068 | case DW_TAG_class_type: |
| 8069 | case DW_TAG_interface_type: |
| 8070 | case DW_TAG_structure_type: |
| 8071 | if (!pdi->is_declaration) |
| 8072 | { |
| 8073 | add_partial_symbol (pdi, cu); |
| 8074 | } |
| 8075 | if ((cu->language == language_rust |
| 8076 | || cu->language == language_cplus) && pdi->has_children) |
| 8077 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
| 8078 | set_addrmap, cu); |
| 8079 | break; |
| 8080 | case DW_TAG_enumeration_type: |
| 8081 | if (!pdi->is_declaration) |
| 8082 | add_partial_enumeration (pdi, cu); |
| 8083 | break; |
| 8084 | case DW_TAG_base_type: |
| 8085 | case DW_TAG_subrange_type: |
| 8086 | /* File scope base type definitions are added to the partial |
| 8087 | symbol table. */ |
| 8088 | add_partial_symbol (pdi, cu); |
| 8089 | break; |
| 8090 | case DW_TAG_namespace: |
| 8091 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
| 8092 | break; |
| 8093 | case DW_TAG_module: |
| 8094 | if (!pdi->is_declaration) |
| 8095 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
| 8096 | break; |
| 8097 | case DW_TAG_imported_unit: |
| 8098 | { |
| 8099 | struct dwarf2_per_cu_data *per_cu; |
| 8100 | |
| 8101 | /* For now we don't handle imported units in type units. */ |
| 8102 | if (cu->per_cu->is_debug_types) |
| 8103 | { |
| 8104 | error (_("Dwarf Error: DW_TAG_imported_unit is not" |
| 8105 | " supported in type units [in module %s]"), |
| 8106 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 8107 | } |
| 8108 | |
| 8109 | per_cu = dwarf2_find_containing_comp_unit |
| 8110 | (pdi->d.sect_off, pdi->is_dwz, |
| 8111 | cu->per_cu->dwarf2_per_objfile); |
| 8112 | |
| 8113 | /* Go read the partial unit, if needed. */ |
| 8114 | if (per_cu->v.psymtab == NULL) |
| 8115 | process_psymtab_comp_unit (per_cu, true, cu->language); |
| 8116 | |
| 8117 | cu->per_cu->imported_symtabs_push (per_cu); |
| 8118 | } |
| 8119 | break; |
| 8120 | case DW_TAG_imported_declaration: |
| 8121 | add_partial_symbol (pdi, cu); |
| 8122 | break; |
| 8123 | default: |
| 8124 | break; |
| 8125 | } |
| 8126 | } |
| 8127 | |
| 8128 | /* If the die has a sibling, skip to the sibling. */ |
| 8129 | |
| 8130 | pdi = pdi->die_sibling; |
| 8131 | } |
| 8132 | } |
| 8133 | |
| 8134 | /* Functions used to compute the fully scoped name of a partial DIE. |
| 8135 | |
| 8136 | Normally, this is simple. For C++, the parent DIE's fully scoped |
| 8137 | name is concatenated with "::" and the partial DIE's name. |
| 8138 | Enumerators are an exception; they use the scope of their parent |
| 8139 | enumeration type, i.e. the name of the enumeration type is not |
| 8140 | prepended to the enumerator. |
| 8141 | |
| 8142 | There are two complexities. One is DW_AT_specification; in this |
| 8143 | case "parent" means the parent of the target of the specification, |
| 8144 | instead of the direct parent of the DIE. The other is compilers |
| 8145 | which do not emit DW_TAG_namespace; in this case we try to guess |
| 8146 | the fully qualified name of structure types from their members' |
| 8147 | linkage names. This must be done using the DIE's children rather |
| 8148 | than the children of any DW_AT_specification target. We only need |
| 8149 | to do this for structures at the top level, i.e. if the target of |
| 8150 | any DW_AT_specification (if any; otherwise the DIE itself) does not |
| 8151 | have a parent. */ |
| 8152 | |
| 8153 | /* Compute the scope prefix associated with PDI's parent, in |
| 8154 | compilation unit CU. The result will be allocated on CU's |
| 8155 | comp_unit_obstack, or a copy of the already allocated PDI->NAME |
| 8156 | field. NULL is returned if no prefix is necessary. */ |
| 8157 | static const char * |
| 8158 | partial_die_parent_scope (struct partial_die_info *pdi, |
| 8159 | struct dwarf2_cu *cu) |
| 8160 | { |
| 8161 | const char *grandparent_scope; |
| 8162 | struct partial_die_info *parent, *real_pdi; |
| 8163 | |
| 8164 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
| 8165 | then this means the parent of the specification DIE. */ |
| 8166 | |
| 8167 | real_pdi = pdi; |
| 8168 | while (real_pdi->has_specification) |
| 8169 | { |
| 8170 | auto res = find_partial_die (real_pdi->spec_offset, |
| 8171 | real_pdi->spec_is_dwz, cu); |
| 8172 | real_pdi = res.pdi; |
| 8173 | cu = res.cu; |
| 8174 | } |
| 8175 | |
| 8176 | parent = real_pdi->die_parent; |
| 8177 | if (parent == NULL) |
| 8178 | return NULL; |
| 8179 | |
| 8180 | if (parent->scope_set) |
| 8181 | return parent->scope; |
| 8182 | |
| 8183 | parent->fixup (cu); |
| 8184 | |
| 8185 | grandparent_scope = partial_die_parent_scope (parent, cu); |
| 8186 | |
| 8187 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
| 8188 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. |
| 8189 | Work around this problem here. */ |
| 8190 | if (cu->language == language_cplus |
| 8191 | && parent->tag == DW_TAG_namespace |
| 8192 | && strcmp (parent->name, "::") == 0 |
| 8193 | && grandparent_scope == NULL) |
| 8194 | { |
| 8195 | parent->scope = NULL; |
| 8196 | parent->scope_set = 1; |
| 8197 | return NULL; |
| 8198 | } |
| 8199 | |
| 8200 | /* Nested subroutines in Fortran get a prefix. */ |
| 8201 | if (pdi->tag == DW_TAG_enumerator) |
| 8202 | /* Enumerators should not get the name of the enumeration as a prefix. */ |
| 8203 | parent->scope = grandparent_scope; |
| 8204 | else if (parent->tag == DW_TAG_namespace |
| 8205 | || parent->tag == DW_TAG_module |
| 8206 | || parent->tag == DW_TAG_structure_type |
| 8207 | || parent->tag == DW_TAG_class_type |
| 8208 | || parent->tag == DW_TAG_interface_type |
| 8209 | || parent->tag == DW_TAG_union_type |
| 8210 | || parent->tag == DW_TAG_enumeration_type |
| 8211 | || (cu->language == language_fortran |
| 8212 | && parent->tag == DW_TAG_subprogram |
| 8213 | && pdi->tag == DW_TAG_subprogram)) |
| 8214 | { |
| 8215 | if (grandparent_scope == NULL) |
| 8216 | parent->scope = parent->name; |
| 8217 | else |
| 8218 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
| 8219 | grandparent_scope, |
| 8220 | parent->name, 0, cu); |
| 8221 | } |
| 8222 | else |
| 8223 | { |
| 8224 | /* FIXME drow/2004-04-01: What should we be doing with |
| 8225 | function-local names? For partial symbols, we should probably be |
| 8226 | ignoring them. */ |
| 8227 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
| 8228 | dwarf_tag_name (parent->tag), |
| 8229 | sect_offset_str (pdi->sect_off)); |
| 8230 | parent->scope = grandparent_scope; |
| 8231 | } |
| 8232 | |
| 8233 | parent->scope_set = 1; |
| 8234 | return parent->scope; |
| 8235 | } |
| 8236 | |
| 8237 | /* Return the fully scoped name associated with PDI, from compilation unit |
| 8238 | CU. The result will be allocated with malloc. */ |
| 8239 | |
| 8240 | static gdb::unique_xmalloc_ptr<char> |
| 8241 | partial_die_full_name (struct partial_die_info *pdi, |
| 8242 | struct dwarf2_cu *cu) |
| 8243 | { |
| 8244 | const char *parent_scope; |
| 8245 | |
| 8246 | /* If this is a template instantiation, we can not work out the |
| 8247 | template arguments from partial DIEs. So, unfortunately, we have |
| 8248 | to go through the full DIEs. At least any work we do building |
| 8249 | types here will be reused if full symbols are loaded later. */ |
| 8250 | if (pdi->has_template_arguments) |
| 8251 | { |
| 8252 | pdi->fixup (cu); |
| 8253 | |
| 8254 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) |
| 8255 | { |
| 8256 | struct die_info *die; |
| 8257 | struct attribute attr; |
| 8258 | struct dwarf2_cu *ref_cu = cu; |
| 8259 | |
| 8260 | /* DW_FORM_ref_addr is using section offset. */ |
| 8261 | attr.name = (enum dwarf_attribute) 0; |
| 8262 | attr.form = DW_FORM_ref_addr; |
| 8263 | attr.u.unsnd = to_underlying (pdi->sect_off); |
| 8264 | die = follow_die_ref (NULL, &attr, &ref_cu); |
| 8265 | |
| 8266 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
| 8267 | } |
| 8268 | } |
| 8269 | |
| 8270 | parent_scope = partial_die_parent_scope (pdi, cu); |
| 8271 | if (parent_scope == NULL) |
| 8272 | return NULL; |
| 8273 | else |
| 8274 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
| 8275 | pdi->name, 0, cu)); |
| 8276 | } |
| 8277 | |
| 8278 | static void |
| 8279 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
| 8280 | { |
| 8281 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8282 | = cu->per_cu->dwarf2_per_objfile; |
| 8283 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8284 | struct gdbarch *gdbarch = objfile->arch (); |
| 8285 | CORE_ADDR addr = 0; |
| 8286 | const char *actual_name = NULL; |
| 8287 | CORE_ADDR baseaddr; |
| 8288 | |
| 8289 | baseaddr = objfile->text_section_offset (); |
| 8290 | |
| 8291 | gdb::unique_xmalloc_ptr<char> built_actual_name |
| 8292 | = partial_die_full_name (pdi, cu); |
| 8293 | if (built_actual_name != NULL) |
| 8294 | actual_name = built_actual_name.get (); |
| 8295 | |
| 8296 | if (actual_name == NULL) |
| 8297 | actual_name = pdi->name; |
| 8298 | |
| 8299 | partial_symbol psymbol; |
| 8300 | memset (&psymbol, 0, sizeof (psymbol)); |
| 8301 | psymbol.ginfo.set_language (cu->language, &objfile->objfile_obstack); |
| 8302 | psymbol.ginfo.section = -1; |
| 8303 | |
| 8304 | /* The code below indicates that the psymbol should be installed by |
| 8305 | setting this. */ |
| 8306 | gdb::optional<psymbol_placement> where; |
| 8307 | |
| 8308 | switch (pdi->tag) |
| 8309 | { |
| 8310 | case DW_TAG_inlined_subroutine: |
| 8311 | case DW_TAG_subprogram: |
| 8312 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
| 8313 | - baseaddr); |
| 8314 | if (pdi->is_external |
| 8315 | || cu->language == language_ada |
| 8316 | || (cu->language == language_fortran |
| 8317 | && pdi->die_parent != NULL |
| 8318 | && pdi->die_parent->tag == DW_TAG_subprogram)) |
| 8319 | { |
| 8320 | /* Normally, only "external" DIEs are part of the global scope. |
| 8321 | But in Ada and Fortran, we want to be able to access nested |
| 8322 | procedures globally. So all Ada and Fortran subprograms are |
| 8323 | stored in the global scope. */ |
| 8324 | where = psymbol_placement::GLOBAL; |
| 8325 | } |
| 8326 | else |
| 8327 | where = psymbol_placement::STATIC; |
| 8328 | |
| 8329 | psymbol.domain = VAR_DOMAIN; |
| 8330 | psymbol.aclass = LOC_BLOCK; |
| 8331 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); |
| 8332 | psymbol.ginfo.value.address = addr; |
| 8333 | |
| 8334 | if (pdi->main_subprogram && actual_name != NULL) |
| 8335 | set_objfile_main_name (objfile, actual_name, cu->language); |
| 8336 | break; |
| 8337 | case DW_TAG_constant: |
| 8338 | psymbol.domain = VAR_DOMAIN; |
| 8339 | psymbol.aclass = LOC_STATIC; |
| 8340 | where = (pdi->is_external |
| 8341 | ? psymbol_placement::GLOBAL |
| 8342 | : psymbol_placement::STATIC); |
| 8343 | break; |
| 8344 | case DW_TAG_variable: |
| 8345 | if (pdi->d.locdesc) |
| 8346 | addr = decode_locdesc (pdi->d.locdesc, cu); |
| 8347 | |
| 8348 | if (pdi->d.locdesc |
| 8349 | && addr == 0 |
| 8350 | && !dwarf2_per_objfile->has_section_at_zero) |
| 8351 | { |
| 8352 | /* A global or static variable may also have been stripped |
| 8353 | out by the linker if unused, in which case its address |
| 8354 | will be nullified; do not add such variables into partial |
| 8355 | symbol table then. */ |
| 8356 | } |
| 8357 | else if (pdi->is_external) |
| 8358 | { |
| 8359 | /* Global Variable. |
| 8360 | Don't enter into the minimal symbol tables as there is |
| 8361 | a minimal symbol table entry from the ELF symbols already. |
| 8362 | Enter into partial symbol table if it has a location |
| 8363 | descriptor or a type. |
| 8364 | If the location descriptor is missing, new_symbol will create |
| 8365 | a LOC_UNRESOLVED symbol, the address of the variable will then |
| 8366 | be determined from the minimal symbol table whenever the variable |
| 8367 | is referenced. |
| 8368 | The address for the partial symbol table entry is not |
| 8369 | used by GDB, but it comes in handy for debugging partial symbol |
| 8370 | table building. */ |
| 8371 | |
| 8372 | if (pdi->d.locdesc || pdi->has_type) |
| 8373 | { |
| 8374 | psymbol.domain = VAR_DOMAIN; |
| 8375 | psymbol.aclass = LOC_STATIC; |
| 8376 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); |
| 8377 | psymbol.ginfo.value.address = addr; |
| 8378 | where = psymbol_placement::GLOBAL; |
| 8379 | } |
| 8380 | } |
| 8381 | else |
| 8382 | { |
| 8383 | int has_loc = pdi->d.locdesc != NULL; |
| 8384 | |
| 8385 | /* Static Variable. Skip symbols whose value we cannot know (those |
| 8386 | without location descriptors or constant values). */ |
| 8387 | if (!has_loc && !pdi->has_const_value) |
| 8388 | return; |
| 8389 | |
| 8390 | psymbol.domain = VAR_DOMAIN; |
| 8391 | psymbol.aclass = LOC_STATIC; |
| 8392 | psymbol.ginfo.section = SECT_OFF_TEXT (objfile); |
| 8393 | if (has_loc) |
| 8394 | psymbol.ginfo.value.address = addr; |
| 8395 | where = psymbol_placement::STATIC; |
| 8396 | } |
| 8397 | break; |
| 8398 | case DW_TAG_typedef: |
| 8399 | case DW_TAG_base_type: |
| 8400 | case DW_TAG_subrange_type: |
| 8401 | psymbol.domain = VAR_DOMAIN; |
| 8402 | psymbol.aclass = LOC_TYPEDEF; |
| 8403 | where = psymbol_placement::STATIC; |
| 8404 | break; |
| 8405 | case DW_TAG_imported_declaration: |
| 8406 | case DW_TAG_namespace: |
| 8407 | psymbol.domain = VAR_DOMAIN; |
| 8408 | psymbol.aclass = LOC_TYPEDEF; |
| 8409 | where = psymbol_placement::GLOBAL; |
| 8410 | break; |
| 8411 | case DW_TAG_module: |
| 8412 | /* With Fortran 77 there might be a "BLOCK DATA" module |
| 8413 | available without any name. If so, we skip the module as it |
| 8414 | doesn't bring any value. */ |
| 8415 | if (actual_name != nullptr) |
| 8416 | { |
| 8417 | psymbol.domain = MODULE_DOMAIN; |
| 8418 | psymbol.aclass = LOC_TYPEDEF; |
| 8419 | where = psymbol_placement::GLOBAL; |
| 8420 | } |
| 8421 | break; |
| 8422 | case DW_TAG_class_type: |
| 8423 | case DW_TAG_interface_type: |
| 8424 | case DW_TAG_structure_type: |
| 8425 | case DW_TAG_union_type: |
| 8426 | case DW_TAG_enumeration_type: |
| 8427 | /* Skip external references. The DWARF standard says in the section |
| 8428 | about "Structure, Union, and Class Type Entries": "An incomplete |
| 8429 | structure, union or class type is represented by a structure, |
| 8430 | union or class entry that does not have a byte size attribute |
| 8431 | and that has a DW_AT_declaration attribute." */ |
| 8432 | if (!pdi->has_byte_size && pdi->is_declaration) |
| 8433 | return; |
| 8434 | |
| 8435 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
| 8436 | static vs. global. */ |
| 8437 | psymbol.domain = STRUCT_DOMAIN; |
| 8438 | psymbol.aclass = LOC_TYPEDEF; |
| 8439 | where = (cu->language == language_cplus |
| 8440 | ? psymbol_placement::GLOBAL |
| 8441 | : psymbol_placement::STATIC); |
| 8442 | break; |
| 8443 | case DW_TAG_enumerator: |
| 8444 | psymbol.domain = VAR_DOMAIN; |
| 8445 | psymbol.aclass = LOC_CONST; |
| 8446 | where = (cu->language == language_cplus |
| 8447 | ? psymbol_placement::GLOBAL |
| 8448 | : psymbol_placement::STATIC); |
| 8449 | break; |
| 8450 | default: |
| 8451 | break; |
| 8452 | } |
| 8453 | |
| 8454 | if (where.has_value ()) |
| 8455 | { |
| 8456 | if (built_actual_name != nullptr) |
| 8457 | actual_name = objfile->intern (actual_name); |
| 8458 | if (pdi->linkage_name == nullptr || cu->language == language_ada) |
| 8459 | psymbol.ginfo.set_linkage_name (actual_name); |
| 8460 | else |
| 8461 | { |
| 8462 | psymbol.ginfo.set_demangled_name (actual_name, |
| 8463 | &objfile->objfile_obstack); |
| 8464 | psymbol.ginfo.set_linkage_name (pdi->linkage_name); |
| 8465 | } |
| 8466 | add_psymbol_to_list (psymbol, *where, objfile); |
| 8467 | } |
| 8468 | } |
| 8469 | |
| 8470 | /* Read a partial die corresponding to a namespace; also, add a symbol |
| 8471 | corresponding to that namespace to the symbol table. NAMESPACE is |
| 8472 | the name of the enclosing namespace. */ |
| 8473 | |
| 8474 | static void |
| 8475 | add_partial_namespace (struct partial_die_info *pdi, |
| 8476 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 8477 | int set_addrmap, struct dwarf2_cu *cu) |
| 8478 | { |
| 8479 | /* Add a symbol for the namespace. */ |
| 8480 | |
| 8481 | add_partial_symbol (pdi, cu); |
| 8482 | |
| 8483 | /* Now scan partial symbols in that namespace. */ |
| 8484 | |
| 8485 | if (pdi->has_children) |
| 8486 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
| 8487 | } |
| 8488 | |
| 8489 | /* Read a partial die corresponding to a Fortran module. */ |
| 8490 | |
| 8491 | static void |
| 8492 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
| 8493 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
| 8494 | { |
| 8495 | /* Add a symbol for the namespace. */ |
| 8496 | |
| 8497 | add_partial_symbol (pdi, cu); |
| 8498 | |
| 8499 | /* Now scan partial symbols in that module. */ |
| 8500 | |
| 8501 | if (pdi->has_children) |
| 8502 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
| 8503 | } |
| 8504 | |
| 8505 | /* Read a partial die corresponding to a subprogram or an inlined |
| 8506 | subprogram and create a partial symbol for that subprogram. |
| 8507 | When the CU language allows it, this routine also defines a partial |
| 8508 | symbol for each nested subprogram that this subprogram contains. |
| 8509 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. |
| 8510 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. |
| 8511 | |
| 8512 | PDI may also be a lexical block, in which case we simply search |
| 8513 | recursively for subprograms defined inside that lexical block. |
| 8514 | Again, this is only performed when the CU language allows this |
| 8515 | type of definitions. */ |
| 8516 | |
| 8517 | static void |
| 8518 | add_partial_subprogram (struct partial_die_info *pdi, |
| 8519 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 8520 | int set_addrmap, struct dwarf2_cu *cu) |
| 8521 | { |
| 8522 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
| 8523 | { |
| 8524 | if (pdi->has_pc_info) |
| 8525 | { |
| 8526 | if (pdi->lowpc < *lowpc) |
| 8527 | *lowpc = pdi->lowpc; |
| 8528 | if (pdi->highpc > *highpc) |
| 8529 | *highpc = pdi->highpc; |
| 8530 | if (set_addrmap) |
| 8531 | { |
| 8532 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 8533 | struct gdbarch *gdbarch = objfile->arch (); |
| 8534 | CORE_ADDR baseaddr; |
| 8535 | CORE_ADDR this_highpc; |
| 8536 | CORE_ADDR this_lowpc; |
| 8537 | |
| 8538 | baseaddr = objfile->text_section_offset (); |
| 8539 | this_lowpc |
| 8540 | = (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 8541 | pdi->lowpc + baseaddr) |
| 8542 | - baseaddr); |
| 8543 | this_highpc |
| 8544 | = (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 8545 | pdi->highpc + baseaddr) |
| 8546 | - baseaddr); |
| 8547 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
| 8548 | this_lowpc, this_highpc - 1, |
| 8549 | cu->per_cu->v.psymtab); |
| 8550 | } |
| 8551 | } |
| 8552 | |
| 8553 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) |
| 8554 | { |
| 8555 | if (!pdi->is_declaration) |
| 8556 | /* Ignore subprogram DIEs that do not have a name, they are |
| 8557 | illegal. Do not emit a complaint at this point, we will |
| 8558 | do so when we convert this psymtab into a symtab. */ |
| 8559 | if (pdi->name) |
| 8560 | add_partial_symbol (pdi, cu); |
| 8561 | } |
| 8562 | } |
| 8563 | |
| 8564 | if (! pdi->has_children) |
| 8565 | return; |
| 8566 | |
| 8567 | if (cu->language == language_ada || cu->language == language_fortran) |
| 8568 | { |
| 8569 | pdi = pdi->die_child; |
| 8570 | while (pdi != NULL) |
| 8571 | { |
| 8572 | pdi->fixup (cu); |
| 8573 | if (pdi->tag == DW_TAG_subprogram |
| 8574 | || pdi->tag == DW_TAG_inlined_subroutine |
| 8575 | || pdi->tag == DW_TAG_lexical_block) |
| 8576 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
| 8577 | pdi = pdi->die_sibling; |
| 8578 | } |
| 8579 | } |
| 8580 | } |
| 8581 | |
| 8582 | /* Read a partial die corresponding to an enumeration type. */ |
| 8583 | |
| 8584 | static void |
| 8585 | add_partial_enumeration (struct partial_die_info *enum_pdi, |
| 8586 | struct dwarf2_cu *cu) |
| 8587 | { |
| 8588 | struct partial_die_info *pdi; |
| 8589 | |
| 8590 | if (enum_pdi->name != NULL) |
| 8591 | add_partial_symbol (enum_pdi, cu); |
| 8592 | |
| 8593 | pdi = enum_pdi->die_child; |
| 8594 | while (pdi) |
| 8595 | { |
| 8596 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
| 8597 | complaint (_("malformed enumerator DIE ignored")); |
| 8598 | else |
| 8599 | add_partial_symbol (pdi, cu); |
| 8600 | pdi = pdi->die_sibling; |
| 8601 | } |
| 8602 | } |
| 8603 | |
| 8604 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
| 8605 | |
| 8606 | static unsigned int |
| 8607 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
| 8608 | { |
| 8609 | unsigned int bytes_read; |
| 8610 | |
| 8611 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 8612 | } |
| 8613 | |
| 8614 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
| 8615 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. |
| 8616 | |
| 8617 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
| 8618 | an empty DIE). In either case *BYTES_READ will be set to the length of |
| 8619 | the initial number. */ |
| 8620 | |
| 8621 | static struct abbrev_info * |
| 8622 | peek_die_abbrev (const die_reader_specs &reader, |
| 8623 | const gdb_byte *info_ptr, unsigned int *bytes_read) |
| 8624 | { |
| 8625 | dwarf2_cu *cu = reader.cu; |
| 8626 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
| 8627 | unsigned int abbrev_number |
| 8628 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
| 8629 | |
| 8630 | if (abbrev_number == 0) |
| 8631 | return NULL; |
| 8632 | |
| 8633 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
| 8634 | if (!abbrev) |
| 8635 | { |
| 8636 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
| 8637 | " at offset %s [in module %s]"), |
| 8638 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
| 8639 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
| 8640 | } |
| 8641 | |
| 8642 | return abbrev; |
| 8643 | } |
| 8644 | |
| 8645 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
| 8646 | Returns a pointer to the end of a series of DIEs, terminated by an empty |
| 8647 | DIE. Any children of the skipped DIEs will also be skipped. */ |
| 8648 | |
| 8649 | static const gdb_byte * |
| 8650 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) |
| 8651 | { |
| 8652 | while (1) |
| 8653 | { |
| 8654 | unsigned int bytes_read; |
| 8655 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
| 8656 | |
| 8657 | if (abbrev == NULL) |
| 8658 | return info_ptr + bytes_read; |
| 8659 | else |
| 8660 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 8661 | } |
| 8662 | } |
| 8663 | |
| 8664 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
| 8665 | INFO_PTR should point just after the initial uleb128 of a DIE, and the |
| 8666 | abbrev corresponding to that skipped uleb128 should be passed in |
| 8667 | ABBREV. Returns a pointer to this DIE's sibling, skipping any |
| 8668 | children. */ |
| 8669 | |
| 8670 | static const gdb_byte * |
| 8671 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, |
| 8672 | struct abbrev_info *abbrev) |
| 8673 | { |
| 8674 | unsigned int bytes_read; |
| 8675 | struct attribute attr; |
| 8676 | bfd *abfd = reader->abfd; |
| 8677 | struct dwarf2_cu *cu = reader->cu; |
| 8678 | const gdb_byte *buffer = reader->buffer; |
| 8679 | const gdb_byte *buffer_end = reader->buffer_end; |
| 8680 | unsigned int form, i; |
| 8681 | |
| 8682 | for (i = 0; i < abbrev->num_attrs; i++) |
| 8683 | { |
| 8684 | /* The only abbrev we care about is DW_AT_sibling. */ |
| 8685 | if (abbrev->attrs[i].name == DW_AT_sibling) |
| 8686 | { |
| 8687 | bool ignored; |
| 8688 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr, |
| 8689 | &ignored); |
| 8690 | if (attr.form == DW_FORM_ref_addr) |
| 8691 | complaint (_("ignoring absolute DW_AT_sibling")); |
| 8692 | else |
| 8693 | { |
| 8694 | sect_offset off = attr.get_ref_die_offset (); |
| 8695 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
| 8696 | |
| 8697 | if (sibling_ptr < info_ptr) |
| 8698 | complaint (_("DW_AT_sibling points backwards")); |
| 8699 | else if (sibling_ptr > reader->buffer_end) |
| 8700 | reader->die_section->overflow_complaint (); |
| 8701 | else |
| 8702 | return sibling_ptr; |
| 8703 | } |
| 8704 | } |
| 8705 | |
| 8706 | /* If it isn't DW_AT_sibling, skip this attribute. */ |
| 8707 | form = abbrev->attrs[i].form; |
| 8708 | skip_attribute: |
| 8709 | switch (form) |
| 8710 | { |
| 8711 | case DW_FORM_ref_addr: |
| 8712 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
| 8713 | and later it is offset sized. */ |
| 8714 | if (cu->header.version == 2) |
| 8715 | info_ptr += cu->header.addr_size; |
| 8716 | else |
| 8717 | info_ptr += cu->header.offset_size; |
| 8718 | break; |
| 8719 | case DW_FORM_GNU_ref_alt: |
| 8720 | info_ptr += cu->header.offset_size; |
| 8721 | break; |
| 8722 | case DW_FORM_addr: |
| 8723 | info_ptr += cu->header.addr_size; |
| 8724 | break; |
| 8725 | case DW_FORM_data1: |
| 8726 | case DW_FORM_ref1: |
| 8727 | case DW_FORM_flag: |
| 8728 | case DW_FORM_strx1: |
| 8729 | info_ptr += 1; |
| 8730 | break; |
| 8731 | case DW_FORM_flag_present: |
| 8732 | case DW_FORM_implicit_const: |
| 8733 | break; |
| 8734 | case DW_FORM_data2: |
| 8735 | case DW_FORM_ref2: |
| 8736 | case DW_FORM_strx2: |
| 8737 | info_ptr += 2; |
| 8738 | break; |
| 8739 | case DW_FORM_strx3: |
| 8740 | info_ptr += 3; |
| 8741 | break; |
| 8742 | case DW_FORM_data4: |
| 8743 | case DW_FORM_ref4: |
| 8744 | case DW_FORM_strx4: |
| 8745 | info_ptr += 4; |
| 8746 | break; |
| 8747 | case DW_FORM_data8: |
| 8748 | case DW_FORM_ref8: |
| 8749 | case DW_FORM_ref_sig8: |
| 8750 | info_ptr += 8; |
| 8751 | break; |
| 8752 | case DW_FORM_data16: |
| 8753 | info_ptr += 16; |
| 8754 | break; |
| 8755 | case DW_FORM_string: |
| 8756 | read_direct_string (abfd, info_ptr, &bytes_read); |
| 8757 | info_ptr += bytes_read; |
| 8758 | break; |
| 8759 | case DW_FORM_sec_offset: |
| 8760 | case DW_FORM_strp: |
| 8761 | case DW_FORM_GNU_strp_alt: |
| 8762 | info_ptr += cu->header.offset_size; |
| 8763 | break; |
| 8764 | case DW_FORM_exprloc: |
| 8765 | case DW_FORM_block: |
| 8766 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 8767 | info_ptr += bytes_read; |
| 8768 | break; |
| 8769 | case DW_FORM_block1: |
| 8770 | info_ptr += 1 + read_1_byte (abfd, info_ptr); |
| 8771 | break; |
| 8772 | case DW_FORM_block2: |
| 8773 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); |
| 8774 | break; |
| 8775 | case DW_FORM_block4: |
| 8776 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); |
| 8777 | break; |
| 8778 | case DW_FORM_addrx: |
| 8779 | case DW_FORM_strx: |
| 8780 | case DW_FORM_sdata: |
| 8781 | case DW_FORM_udata: |
| 8782 | case DW_FORM_ref_udata: |
| 8783 | case DW_FORM_GNU_addr_index: |
| 8784 | case DW_FORM_GNU_str_index: |
| 8785 | case DW_FORM_rnglistx: |
| 8786 | case DW_FORM_loclistx: |
| 8787 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
| 8788 | break; |
| 8789 | case DW_FORM_indirect: |
| 8790 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 8791 | info_ptr += bytes_read; |
| 8792 | /* We need to continue parsing from here, so just go back to |
| 8793 | the top. */ |
| 8794 | goto skip_attribute; |
| 8795 | |
| 8796 | default: |
| 8797 | error (_("Dwarf Error: Cannot handle %s " |
| 8798 | "in DWARF reader [in module %s]"), |
| 8799 | dwarf_form_name (form), |
| 8800 | bfd_get_filename (abfd)); |
| 8801 | } |
| 8802 | } |
| 8803 | |
| 8804 | if (abbrev->has_children) |
| 8805 | return skip_children (reader, info_ptr); |
| 8806 | else |
| 8807 | return info_ptr; |
| 8808 | } |
| 8809 | |
| 8810 | /* Locate ORIG_PDI's sibling. |
| 8811 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
| 8812 | |
| 8813 | static const gdb_byte * |
| 8814 | locate_pdi_sibling (const struct die_reader_specs *reader, |
| 8815 | struct partial_die_info *orig_pdi, |
| 8816 | const gdb_byte *info_ptr) |
| 8817 | { |
| 8818 | /* Do we know the sibling already? */ |
| 8819 | |
| 8820 | if (orig_pdi->sibling) |
| 8821 | return orig_pdi->sibling; |
| 8822 | |
| 8823 | /* Are there any children to deal with? */ |
| 8824 | |
| 8825 | if (!orig_pdi->has_children) |
| 8826 | return info_ptr; |
| 8827 | |
| 8828 | /* Skip the children the long way. */ |
| 8829 | |
| 8830 | return skip_children (reader, info_ptr); |
| 8831 | } |
| 8832 | |
| 8833 | /* Expand this partial symbol table into a full symbol table. SELF is |
| 8834 | not NULL. */ |
| 8835 | |
| 8836 | void |
| 8837 | dwarf2_psymtab::read_symtab (struct objfile *objfile) |
| 8838 | { |
| 8839 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8840 | = get_dwarf2_per_objfile (objfile); |
| 8841 | |
| 8842 | gdb_assert (!readin); |
| 8843 | /* If this psymtab is constructed from a debug-only objfile, the |
| 8844 | has_section_at_zero flag will not necessarily be correct. We |
| 8845 | can get the correct value for this flag by looking at the data |
| 8846 | associated with the (presumably stripped) associated objfile. */ |
| 8847 | if (objfile->separate_debug_objfile_backlink) |
| 8848 | { |
| 8849 | struct dwarf2_per_objfile *dpo_backlink |
| 8850 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
| 8851 | |
| 8852 | dwarf2_per_objfile->has_section_at_zero |
| 8853 | = dpo_backlink->has_section_at_zero; |
| 8854 | } |
| 8855 | |
| 8856 | expand_psymtab (objfile); |
| 8857 | |
| 8858 | process_cu_includes (dwarf2_per_objfile); |
| 8859 | } |
| 8860 | \f |
| 8861 | /* Reading in full CUs. */ |
| 8862 | |
| 8863 | /* Add PER_CU to the queue. */ |
| 8864 | |
| 8865 | static void |
| 8866 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 8867 | enum language pretend_language) |
| 8868 | { |
| 8869 | per_cu->queued = 1; |
| 8870 | per_cu->dwarf2_per_objfile->queue.emplace (per_cu, pretend_language); |
| 8871 | } |
| 8872 | |
| 8873 | /* If PER_CU is not yet queued, add it to the queue. |
| 8874 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a |
| 8875 | dependency. |
| 8876 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
| 8877 | meaning either PER_CU is already queued or it is already loaded. |
| 8878 | |
| 8879 | N.B. There is an invariant here that if a CU is queued then it is loaded. |
| 8880 | The caller is required to load PER_CU if we return non-zero. */ |
| 8881 | |
| 8882 | static int |
| 8883 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
| 8884 | struct dwarf2_per_cu_data *per_cu, |
| 8885 | enum language pretend_language) |
| 8886 | { |
| 8887 | /* We may arrive here during partial symbol reading, if we need full |
| 8888 | DIEs to process an unusual case (e.g. template arguments). Do |
| 8889 | not queue PER_CU, just tell our caller to load its DIEs. */ |
| 8890 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
| 8891 | { |
| 8892 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) |
| 8893 | return 1; |
| 8894 | return 0; |
| 8895 | } |
| 8896 | |
| 8897 | /* Mark the dependence relation so that we don't flush PER_CU |
| 8898 | too early. */ |
| 8899 | if (dependent_cu != NULL) |
| 8900 | dwarf2_add_dependence (dependent_cu, per_cu); |
| 8901 | |
| 8902 | /* If it's already on the queue, we have nothing to do. */ |
| 8903 | if (per_cu->queued) |
| 8904 | return 0; |
| 8905 | |
| 8906 | /* If the compilation unit is already loaded, just mark it as |
| 8907 | used. */ |
| 8908 | if (per_cu->cu != NULL) |
| 8909 | { |
| 8910 | per_cu->cu->last_used = 0; |
| 8911 | return 0; |
| 8912 | } |
| 8913 | |
| 8914 | /* Add it to the queue. */ |
| 8915 | queue_comp_unit (per_cu, pretend_language); |
| 8916 | |
| 8917 | return 1; |
| 8918 | } |
| 8919 | |
| 8920 | /* Process the queue. */ |
| 8921 | |
| 8922 | static void |
| 8923 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8924 | { |
| 8925 | if (dwarf_read_debug) |
| 8926 | { |
| 8927 | fprintf_unfiltered (gdb_stdlog, |
| 8928 | "Expanding one or more symtabs of objfile %s ...\n", |
| 8929 | objfile_name (dwarf2_per_objfile->objfile)); |
| 8930 | } |
| 8931 | |
| 8932 | /* The queue starts out with one item, but following a DIE reference |
| 8933 | may load a new CU, adding it to the end of the queue. */ |
| 8934 | while (!dwarf2_per_objfile->queue.empty ()) |
| 8935 | { |
| 8936 | dwarf2_queue_item &item = dwarf2_per_objfile->queue.front (); |
| 8937 | |
| 8938 | if ((dwarf2_per_objfile->using_index |
| 8939 | ? !item.per_cu->v.quick->compunit_symtab |
| 8940 | : (item.per_cu->v.psymtab && !item.per_cu->v.psymtab->readin)) |
| 8941 | /* Skip dummy CUs. */ |
| 8942 | && item.per_cu->cu != NULL) |
| 8943 | { |
| 8944 | struct dwarf2_per_cu_data *per_cu = item.per_cu; |
| 8945 | unsigned int debug_print_threshold; |
| 8946 | char buf[100]; |
| 8947 | |
| 8948 | if (per_cu->is_debug_types) |
| 8949 | { |
| 8950 | struct signatured_type *sig_type = |
| 8951 | (struct signatured_type *) per_cu; |
| 8952 | |
| 8953 | sprintf (buf, "TU %s at offset %s", |
| 8954 | hex_string (sig_type->signature), |
| 8955 | sect_offset_str (per_cu->sect_off)); |
| 8956 | /* There can be 100s of TUs. |
| 8957 | Only print them in verbose mode. */ |
| 8958 | debug_print_threshold = 2; |
| 8959 | } |
| 8960 | else |
| 8961 | { |
| 8962 | sprintf (buf, "CU at offset %s", |
| 8963 | sect_offset_str (per_cu->sect_off)); |
| 8964 | debug_print_threshold = 1; |
| 8965 | } |
| 8966 | |
| 8967 | if (dwarf_read_debug >= debug_print_threshold) |
| 8968 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
| 8969 | |
| 8970 | if (per_cu->is_debug_types) |
| 8971 | process_full_type_unit (per_cu, item.pretend_language); |
| 8972 | else |
| 8973 | process_full_comp_unit (per_cu, item.pretend_language); |
| 8974 | |
| 8975 | if (dwarf_read_debug >= debug_print_threshold) |
| 8976 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
| 8977 | } |
| 8978 | |
| 8979 | item.per_cu->queued = 0; |
| 8980 | dwarf2_per_objfile->queue.pop (); |
| 8981 | } |
| 8982 | |
| 8983 | if (dwarf_read_debug) |
| 8984 | { |
| 8985 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", |
| 8986 | objfile_name (dwarf2_per_objfile->objfile)); |
| 8987 | } |
| 8988 | } |
| 8989 | |
| 8990 | /* Read in full symbols for PST, and anything it depends on. */ |
| 8991 | |
| 8992 | void |
| 8993 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) |
| 8994 | { |
| 8995 | gdb_assert (!readin); |
| 8996 | |
| 8997 | expand_dependencies (objfile); |
| 8998 | |
| 8999 | dw2_do_instantiate_symtab (per_cu_data, false); |
| 9000 | gdb_assert (get_compunit_symtab () != nullptr); |
| 9001 | } |
| 9002 | |
| 9003 | /* Trivial hash function for die_info: the hash value of a DIE |
| 9004 | is its offset in .debug_info for this objfile. */ |
| 9005 | |
| 9006 | static hashval_t |
| 9007 | die_hash (const void *item) |
| 9008 | { |
| 9009 | const struct die_info *die = (const struct die_info *) item; |
| 9010 | |
| 9011 | return to_underlying (die->sect_off); |
| 9012 | } |
| 9013 | |
| 9014 | /* Trivial comparison function for die_info structures: two DIEs |
| 9015 | are equal if they have the same offset. */ |
| 9016 | |
| 9017 | static int |
| 9018 | die_eq (const void *item_lhs, const void *item_rhs) |
| 9019 | { |
| 9020 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
| 9021 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; |
| 9022 | |
| 9023 | return die_lhs->sect_off == die_rhs->sect_off; |
| 9024 | } |
| 9025 | |
| 9026 | /* Load the DIEs associated with PER_CU into memory. */ |
| 9027 | |
| 9028 | static void |
| 9029 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 9030 | bool skip_partial, |
| 9031 | enum language pretend_language) |
| 9032 | { |
| 9033 | gdb_assert (! this_cu->is_debug_types); |
| 9034 | |
| 9035 | cutu_reader reader (this_cu, NULL, 1, skip_partial); |
| 9036 | if (reader.dummy_p) |
| 9037 | return; |
| 9038 | |
| 9039 | struct dwarf2_cu *cu = reader.cu; |
| 9040 | const gdb_byte *info_ptr = reader.info_ptr; |
| 9041 | |
| 9042 | gdb_assert (cu->die_hash == NULL); |
| 9043 | cu->die_hash = |
| 9044 | htab_create_alloc_ex (cu->header.length / 12, |
| 9045 | die_hash, |
| 9046 | die_eq, |
| 9047 | NULL, |
| 9048 | &cu->comp_unit_obstack, |
| 9049 | hashtab_obstack_allocate, |
| 9050 | dummy_obstack_deallocate); |
| 9051 | |
| 9052 | if (reader.comp_unit_die->has_children) |
| 9053 | reader.comp_unit_die->child |
| 9054 | = read_die_and_siblings (&reader, reader.info_ptr, |
| 9055 | &info_ptr, reader.comp_unit_die); |
| 9056 | cu->dies = reader.comp_unit_die; |
| 9057 | /* comp_unit_die is not stored in die_hash, no need. */ |
| 9058 | |
| 9059 | /* We try not to read any attributes in this function, because not |
| 9060 | all CUs needed for references have been loaded yet, and symbol |
| 9061 | table processing isn't initialized. But we have to set the CU language, |
| 9062 | or we won't be able to build types correctly. |
| 9063 | Similarly, if we do not read the producer, we can not apply |
| 9064 | producer-specific interpretation. */ |
| 9065 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
| 9066 | |
| 9067 | reader.keep (); |
| 9068 | } |
| 9069 | |
| 9070 | /* Add a DIE to the delayed physname list. */ |
| 9071 | |
| 9072 | static void |
| 9073 | add_to_method_list (struct type *type, int fnfield_index, int index, |
| 9074 | const char *name, struct die_info *die, |
| 9075 | struct dwarf2_cu *cu) |
| 9076 | { |
| 9077 | struct delayed_method_info mi; |
| 9078 | mi.type = type; |
| 9079 | mi.fnfield_index = fnfield_index; |
| 9080 | mi.index = index; |
| 9081 | mi.name = name; |
| 9082 | mi.die = die; |
| 9083 | cu->method_list.push_back (mi); |
| 9084 | } |
| 9085 | |
| 9086 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
| 9087 | "const" / "volatile". If so, decrements LEN by the length of the |
| 9088 | modifier and return true. Otherwise return false. */ |
| 9089 | |
| 9090 | template<size_t N> |
| 9091 | static bool |
| 9092 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) |
| 9093 | { |
| 9094 | size_t mod_len = sizeof (mod) - 1; |
| 9095 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) |
| 9096 | { |
| 9097 | len -= mod_len; |
| 9098 | return true; |
| 9099 | } |
| 9100 | return false; |
| 9101 | } |
| 9102 | |
| 9103 | /* Compute the physnames of any methods on the CU's method list. |
| 9104 | |
| 9105 | The computation of method physnames is delayed in order to avoid the |
| 9106 | (bad) condition that one of the method's formal parameters is of an as yet |
| 9107 | incomplete type. */ |
| 9108 | |
| 9109 | static void |
| 9110 | compute_delayed_physnames (struct dwarf2_cu *cu) |
| 9111 | { |
| 9112 | /* Only C++ delays computing physnames. */ |
| 9113 | if (cu->method_list.empty ()) |
| 9114 | return; |
| 9115 | gdb_assert (cu->language == language_cplus); |
| 9116 | |
| 9117 | for (const delayed_method_info &mi : cu->method_list) |
| 9118 | { |
| 9119 | const char *physname; |
| 9120 | struct fn_fieldlist *fn_flp |
| 9121 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
| 9122 | physname = dwarf2_physname (mi.name, mi.die, cu); |
| 9123 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) |
| 9124 | = physname ? physname : ""; |
| 9125 | |
| 9126 | /* Since there's no tag to indicate whether a method is a |
| 9127 | const/volatile overload, extract that information out of the |
| 9128 | demangled name. */ |
| 9129 | if (physname != NULL) |
| 9130 | { |
| 9131 | size_t len = strlen (physname); |
| 9132 | |
| 9133 | while (1) |
| 9134 | { |
| 9135 | if (physname[len] == ')') /* shortcut */ |
| 9136 | break; |
| 9137 | else if (check_modifier (physname, len, " const")) |
| 9138 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
| 9139 | else if (check_modifier (physname, len, " volatile")) |
| 9140 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
| 9141 | else |
| 9142 | break; |
| 9143 | } |
| 9144 | } |
| 9145 | } |
| 9146 | |
| 9147 | /* The list is no longer needed. */ |
| 9148 | cu->method_list.clear (); |
| 9149 | } |
| 9150 | |
| 9151 | /* Go objects should be embedded in a DW_TAG_module DIE, |
| 9152 | and it's not clear if/how imported objects will appear. |
| 9153 | To keep Go support simple until that's worked out, |
| 9154 | go back through what we've read and create something usable. |
| 9155 | We could do this while processing each DIE, and feels kinda cleaner, |
| 9156 | but that way is more invasive. |
| 9157 | This is to, for example, allow the user to type "p var" or "b main" |
| 9158 | without having to specify the package name, and allow lookups |
| 9159 | of module.object to work in contexts that use the expression |
| 9160 | parser. */ |
| 9161 | |
| 9162 | static void |
| 9163 | fixup_go_packaging (struct dwarf2_cu *cu) |
| 9164 | { |
| 9165 | gdb::unique_xmalloc_ptr<char> package_name; |
| 9166 | struct pending *list; |
| 9167 | int i; |
| 9168 | |
| 9169 | for (list = *cu->get_builder ()->get_global_symbols (); |
| 9170 | list != NULL; |
| 9171 | list = list->next) |
| 9172 | { |
| 9173 | for (i = 0; i < list->nsyms; ++i) |
| 9174 | { |
| 9175 | struct symbol *sym = list->symbol[i]; |
| 9176 | |
| 9177 | if (sym->language () == language_go |
| 9178 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 9179 | { |
| 9180 | gdb::unique_xmalloc_ptr<char> this_package_name |
| 9181 | (go_symbol_package_name (sym)); |
| 9182 | |
| 9183 | if (this_package_name == NULL) |
| 9184 | continue; |
| 9185 | if (package_name == NULL) |
| 9186 | package_name = std::move (this_package_name); |
| 9187 | else |
| 9188 | { |
| 9189 | struct objfile *objfile |
| 9190 | = cu->per_cu->dwarf2_per_objfile->objfile; |
| 9191 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
| 9192 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
| 9193 | (symbol_symtab (sym) != NULL |
| 9194 | ? symtab_to_filename_for_display |
| 9195 | (symbol_symtab (sym)) |
| 9196 | : objfile_name (objfile)), |
| 9197 | this_package_name.get (), package_name.get ()); |
| 9198 | } |
| 9199 | } |
| 9200 | } |
| 9201 | } |
| 9202 | |
| 9203 | if (package_name != NULL) |
| 9204 | { |
| 9205 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 9206 | const char *saved_package_name = objfile->intern (package_name.get ()); |
| 9207 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
| 9208 | saved_package_name); |
| 9209 | struct symbol *sym; |
| 9210 | |
| 9211 | sym = new (&objfile->objfile_obstack) symbol; |
| 9212 | sym->set_language (language_go, &objfile->objfile_obstack); |
| 9213 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
| 9214 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
| 9215 | e.g., "main" finds the "main" module and not C's main(). */ |
| 9216 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 9217 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 9218 | SYMBOL_TYPE (sym) = type; |
| 9219 | |
| 9220 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
| 9221 | } |
| 9222 | } |
| 9223 | |
| 9224 | /* Allocate a fully-qualified name consisting of the two parts on the |
| 9225 | obstack. */ |
| 9226 | |
| 9227 | static const char * |
| 9228 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) |
| 9229 | { |
| 9230 | return obconcat (obstack, p1, "::", p2, (char *) NULL); |
| 9231 | } |
| 9232 | |
| 9233 | /* A helper that allocates a variant part to attach to a Rust enum |
| 9234 | type. OBSTACK is where the results should be allocated. TYPE is |
| 9235 | the type we're processing. DISCRIMINANT_INDEX is the index of the |
| 9236 | discriminant. It must be the index of one of the fields of TYPE. |
| 9237 | DEFAULT_INDEX is the index of the default field; or -1 if there is |
| 9238 | no default. RANGES is indexed by "effective" field number (the |
| 9239 | field index, but omitting the discriminant and default fields) and |
| 9240 | must hold the discriminant values used by the variants. Note that |
| 9241 | RANGES must have a lifetime at least as long as OBSTACK -- either |
| 9242 | already allocated on it, or static. */ |
| 9243 | |
| 9244 | static void |
| 9245 | alloc_rust_variant (struct obstack *obstack, struct type *type, |
| 9246 | int discriminant_index, int default_index, |
| 9247 | gdb::array_view<discriminant_range> ranges) |
| 9248 | { |
| 9249 | /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those |
| 9250 | must be handled by the caller. */ |
| 9251 | gdb_assert (discriminant_index >= 0 |
| 9252 | && discriminant_index < type->num_fields ()); |
| 9253 | gdb_assert (default_index == -1 |
| 9254 | || (default_index >= 0 && default_index < type->num_fields ())); |
| 9255 | |
| 9256 | /* We have one variant for each non-discriminant field. */ |
| 9257 | int n_variants = type->num_fields () - 1; |
| 9258 | |
| 9259 | variant *variants = new (obstack) variant[n_variants]; |
| 9260 | int var_idx = 0; |
| 9261 | int range_idx = 0; |
| 9262 | for (int i = 0; i < type->num_fields (); ++i) |
| 9263 | { |
| 9264 | if (i == discriminant_index) |
| 9265 | continue; |
| 9266 | |
| 9267 | variants[var_idx].first_field = i; |
| 9268 | variants[var_idx].last_field = i + 1; |
| 9269 | |
| 9270 | /* The default field does not need a range, but other fields do. |
| 9271 | We skipped the discriminant above. */ |
| 9272 | if (i != default_index) |
| 9273 | { |
| 9274 | variants[var_idx].discriminants = ranges.slice (range_idx, 1); |
| 9275 | ++range_idx; |
| 9276 | } |
| 9277 | |
| 9278 | ++var_idx; |
| 9279 | } |
| 9280 | |
| 9281 | gdb_assert (range_idx == ranges.size ()); |
| 9282 | gdb_assert (var_idx == n_variants); |
| 9283 | |
| 9284 | variant_part *part = new (obstack) variant_part; |
| 9285 | part->discriminant_index = discriminant_index; |
| 9286 | part->is_unsigned = TYPE_UNSIGNED (TYPE_FIELD_TYPE (type, |
| 9287 | discriminant_index)); |
| 9288 | part->variants = gdb::array_view<variant> (variants, n_variants); |
| 9289 | |
| 9290 | void *storage = obstack_alloc (obstack, sizeof (gdb::array_view<variant_part>)); |
| 9291 | gdb::array_view<variant_part> *prop_value |
| 9292 | = new (storage) gdb::array_view<variant_part> (part, 1); |
| 9293 | |
| 9294 | struct dynamic_prop prop; |
| 9295 | prop.kind = PROP_VARIANT_PARTS; |
| 9296 | prop.data.variant_parts = prop_value; |
| 9297 | |
| 9298 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
| 9299 | } |
| 9300 | |
| 9301 | /* Some versions of rustc emitted enums in an unusual way. |
| 9302 | |
| 9303 | Ordinary enums were emitted as unions. The first element of each |
| 9304 | structure in the union was named "RUST$ENUM$DISR". This element |
| 9305 | held the discriminant. |
| 9306 | |
| 9307 | These versions of Rust also implemented the "non-zero" |
| 9308 | optimization. When the enum had two values, and one is empty and |
| 9309 | the other holds a pointer that cannot be zero, the pointer is used |
| 9310 | as the discriminant, with a zero value meaning the empty variant. |
| 9311 | Here, the union's first member is of the form |
| 9312 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> |
| 9313 | where the fieldnos are the indices of the fields that should be |
| 9314 | traversed in order to find the field (which may be several fields deep) |
| 9315 | and the variantname is the name of the variant of the case when the |
| 9316 | field is zero. |
| 9317 | |
| 9318 | This function recognizes whether TYPE is of one of these forms, |
| 9319 | and, if so, smashes it to be a variant type. */ |
| 9320 | |
| 9321 | static void |
| 9322 | quirk_rust_enum (struct type *type, struct objfile *objfile) |
| 9323 | { |
| 9324 | gdb_assert (type->code () == TYPE_CODE_UNION); |
| 9325 | |
| 9326 | /* We don't need to deal with empty enums. */ |
| 9327 | if (type->num_fields () == 0) |
| 9328 | return; |
| 9329 | |
| 9330 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" |
| 9331 | if (type->num_fields () == 1 |
| 9332 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) |
| 9333 | { |
| 9334 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); |
| 9335 | |
| 9336 | /* Decode the field name to find the offset of the |
| 9337 | discriminant. */ |
| 9338 | ULONGEST bit_offset = 0; |
| 9339 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); |
| 9340 | while (name[0] >= '0' && name[0] <= '9') |
| 9341 | { |
| 9342 | char *tail; |
| 9343 | unsigned long index = strtoul (name, &tail, 10); |
| 9344 | name = tail; |
| 9345 | if (*name != '$' |
| 9346 | || index >= field_type->num_fields () |
| 9347 | || (TYPE_FIELD_LOC_KIND (field_type, index) |
| 9348 | != FIELD_LOC_KIND_BITPOS)) |
| 9349 | { |
| 9350 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
| 9351 | "[in module %s]"), |
| 9352 | TYPE_FIELD_NAME (type, 0), |
| 9353 | objfile_name (objfile)); |
| 9354 | return; |
| 9355 | } |
| 9356 | ++name; |
| 9357 | |
| 9358 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); |
| 9359 | field_type = TYPE_FIELD_TYPE (field_type, index); |
| 9360 | } |
| 9361 | |
| 9362 | /* Smash this type to be a structure type. We have to do this |
| 9363 | because the type has already been recorded. */ |
| 9364 | type->set_code (TYPE_CODE_STRUCT); |
| 9365 | type->set_num_fields (3); |
| 9366 | /* Save the field we care about. */ |
| 9367 | struct field saved_field = TYPE_FIELD (type, 0); |
| 9368 | type->set_fields |
| 9369 | ((struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field))); |
| 9370 | |
| 9371 | /* Put the discriminant at index 0. */ |
| 9372 | TYPE_FIELD_TYPE (type, 0) = field_type; |
| 9373 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
| 9374 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; |
| 9375 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), bit_offset); |
| 9376 | |
| 9377 | /* The order of fields doesn't really matter, so put the real |
| 9378 | field at index 1 and the data-less field at index 2. */ |
| 9379 | TYPE_FIELD (type, 1) = saved_field; |
| 9380 | TYPE_FIELD_NAME (type, 1) |
| 9381 | = rust_last_path_segment (TYPE_FIELD_TYPE (type, 1)->name ()); |
| 9382 | TYPE_FIELD_TYPE (type, 1)->set_name |
| 9383 | (rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
| 9384 | TYPE_FIELD_NAME (type, 1))); |
| 9385 | |
| 9386 | const char *dataless_name |
| 9387 | = rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
| 9388 | name); |
| 9389 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, |
| 9390 | dataless_name); |
| 9391 | TYPE_FIELD_TYPE (type, 2) = dataless_type; |
| 9392 | /* NAME points into the original discriminant name, which |
| 9393 | already has the correct lifetime. */ |
| 9394 | TYPE_FIELD_NAME (type, 2) = name; |
| 9395 | SET_FIELD_BITPOS (TYPE_FIELD (type, 2), 0); |
| 9396 | |
| 9397 | /* Indicate that this is a variant type. */ |
| 9398 | static discriminant_range ranges[1] = { { 0, 0 } }; |
| 9399 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, ranges); |
| 9400 | } |
| 9401 | /* A union with a single anonymous field is probably an old-style |
| 9402 | univariant enum. */ |
| 9403 | else if (type->num_fields () == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) |
| 9404 | { |
| 9405 | /* Smash this type to be a structure type. We have to do this |
| 9406 | because the type has already been recorded. */ |
| 9407 | type->set_code (TYPE_CODE_STRUCT); |
| 9408 | |
| 9409 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); |
| 9410 | const char *variant_name |
| 9411 | = rust_last_path_segment (field_type->name ()); |
| 9412 | TYPE_FIELD_NAME (type, 0) = variant_name; |
| 9413 | field_type->set_name |
| 9414 | (rust_fully_qualify (&objfile->objfile_obstack, |
| 9415 | type->name (), variant_name)); |
| 9416 | } |
| 9417 | else |
| 9418 | { |
| 9419 | struct type *disr_type = nullptr; |
| 9420 | for (int i = 0; i < type->num_fields (); ++i) |
| 9421 | { |
| 9422 | disr_type = TYPE_FIELD_TYPE (type, i); |
| 9423 | |
| 9424 | if (disr_type->code () != TYPE_CODE_STRUCT) |
| 9425 | { |
| 9426 | /* All fields of a true enum will be structs. */ |
| 9427 | return; |
| 9428 | } |
| 9429 | else if (disr_type->num_fields () == 0) |
| 9430 | { |
| 9431 | /* Could be data-less variant, so keep going. */ |
| 9432 | disr_type = nullptr; |
| 9433 | } |
| 9434 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), |
| 9435 | "RUST$ENUM$DISR") != 0) |
| 9436 | { |
| 9437 | /* Not a Rust enum. */ |
| 9438 | return; |
| 9439 | } |
| 9440 | else |
| 9441 | { |
| 9442 | /* Found one. */ |
| 9443 | break; |
| 9444 | } |
| 9445 | } |
| 9446 | |
| 9447 | /* If we got here without a discriminant, then it's probably |
| 9448 | just a union. */ |
| 9449 | if (disr_type == nullptr) |
| 9450 | return; |
| 9451 | |
| 9452 | /* Smash this type to be a structure type. We have to do this |
| 9453 | because the type has already been recorded. */ |
| 9454 | type->set_code (TYPE_CODE_STRUCT); |
| 9455 | |
| 9456 | /* Make space for the discriminant field. */ |
| 9457 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); |
| 9458 | field *new_fields |
| 9459 | = (struct field *) TYPE_ZALLOC (type, ((type->num_fields () + 1) |
| 9460 | * sizeof (struct field))); |
| 9461 | memcpy (new_fields + 1, type->fields (), |
| 9462 | type->num_fields () * sizeof (struct field)); |
| 9463 | type->set_fields (new_fields); |
| 9464 | type->set_num_fields (type->num_fields () + 1); |
| 9465 | |
| 9466 | /* Install the discriminant at index 0 in the union. */ |
| 9467 | TYPE_FIELD (type, 0) = *disr_field; |
| 9468 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
| 9469 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; |
| 9470 | |
| 9471 | /* We need a way to find the correct discriminant given a |
| 9472 | variant name. For convenience we build a map here. */ |
| 9473 | struct type *enum_type = FIELD_TYPE (*disr_field); |
| 9474 | std::unordered_map<std::string, ULONGEST> discriminant_map; |
| 9475 | for (int i = 0; i < enum_type->num_fields (); ++i) |
| 9476 | { |
| 9477 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) |
| 9478 | { |
| 9479 | const char *name |
| 9480 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); |
| 9481 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); |
| 9482 | } |
| 9483 | } |
| 9484 | |
| 9485 | int n_fields = type->num_fields (); |
| 9486 | /* We don't need a range entry for the discriminant, but we do |
| 9487 | need one for every other field, as there is no default |
| 9488 | variant. */ |
| 9489 | discriminant_range *ranges = XOBNEWVEC (&objfile->objfile_obstack, |
| 9490 | discriminant_range, |
| 9491 | n_fields - 1); |
| 9492 | /* Skip the discriminant here. */ |
| 9493 | for (int i = 1; i < n_fields; ++i) |
| 9494 | { |
| 9495 | /* Find the final word in the name of this variant's type. |
| 9496 | That name can be used to look up the correct |
| 9497 | discriminant. */ |
| 9498 | const char *variant_name |
| 9499 | = rust_last_path_segment (TYPE_FIELD_TYPE (type, i)->name ()); |
| 9500 | |
| 9501 | auto iter = discriminant_map.find (variant_name); |
| 9502 | if (iter != discriminant_map.end ()) |
| 9503 | { |
| 9504 | ranges[i].low = iter->second; |
| 9505 | ranges[i].high = iter->second; |
| 9506 | } |
| 9507 | |
| 9508 | /* Remove the discriminant field, if it exists. */ |
| 9509 | struct type *sub_type = TYPE_FIELD_TYPE (type, i); |
| 9510 | if (sub_type->num_fields () > 0) |
| 9511 | { |
| 9512 | sub_type->set_num_fields (sub_type->num_fields () - 1); |
| 9513 | sub_type->set_fields (sub_type->fields () + 1); |
| 9514 | } |
| 9515 | TYPE_FIELD_NAME (type, i) = variant_name; |
| 9516 | sub_type->set_name |
| 9517 | (rust_fully_qualify (&objfile->objfile_obstack, |
| 9518 | type->name (), variant_name)); |
| 9519 | } |
| 9520 | |
| 9521 | /* Indicate that this is a variant type. */ |
| 9522 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, |
| 9523 | gdb::array_view<discriminant_range> (ranges, |
| 9524 | n_fields - 1)); |
| 9525 | } |
| 9526 | } |
| 9527 | |
| 9528 | /* Rewrite some Rust unions to be structures with variants parts. */ |
| 9529 | |
| 9530 | static void |
| 9531 | rust_union_quirks (struct dwarf2_cu *cu) |
| 9532 | { |
| 9533 | gdb_assert (cu->language == language_rust); |
| 9534 | for (type *type_ : cu->rust_unions) |
| 9535 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); |
| 9536 | /* We don't need this any more. */ |
| 9537 | cu->rust_unions.clear (); |
| 9538 | } |
| 9539 | |
| 9540 | /* Return the symtab for PER_CU. This works properly regardless of |
| 9541 | whether we're using the index or psymtabs. */ |
| 9542 | |
| 9543 | static struct compunit_symtab * |
| 9544 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) |
| 9545 | { |
| 9546 | return (per_cu->dwarf2_per_objfile->using_index |
| 9547 | ? per_cu->v.quick->compunit_symtab |
| 9548 | : per_cu->v.psymtab->compunit_symtab); |
| 9549 | } |
| 9550 | |
| 9551 | /* A helper function for computing the list of all symbol tables |
| 9552 | included by PER_CU. */ |
| 9553 | |
| 9554 | static void |
| 9555 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
| 9556 | htab_t all_children, htab_t all_type_symtabs, |
| 9557 | struct dwarf2_per_cu_data *per_cu, |
| 9558 | struct compunit_symtab *immediate_parent) |
| 9559 | { |
| 9560 | void **slot; |
| 9561 | struct compunit_symtab *cust; |
| 9562 | |
| 9563 | slot = htab_find_slot (all_children, per_cu, INSERT); |
| 9564 | if (*slot != NULL) |
| 9565 | { |
| 9566 | /* This inclusion and its children have been processed. */ |
| 9567 | return; |
| 9568 | } |
| 9569 | |
| 9570 | *slot = per_cu; |
| 9571 | /* Only add a CU if it has a symbol table. */ |
| 9572 | cust = get_compunit_symtab (per_cu); |
| 9573 | if (cust != NULL) |
| 9574 | { |
| 9575 | /* If this is a type unit only add its symbol table if we haven't |
| 9576 | seen it yet (type unit per_cu's can share symtabs). */ |
| 9577 | if (per_cu->is_debug_types) |
| 9578 | { |
| 9579 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
| 9580 | if (*slot == NULL) |
| 9581 | { |
| 9582 | *slot = cust; |
| 9583 | result->push_back (cust); |
| 9584 | if (cust->user == NULL) |
| 9585 | cust->user = immediate_parent; |
| 9586 | } |
| 9587 | } |
| 9588 | else |
| 9589 | { |
| 9590 | result->push_back (cust); |
| 9591 | if (cust->user == NULL) |
| 9592 | cust->user = immediate_parent; |
| 9593 | } |
| 9594 | } |
| 9595 | |
| 9596 | if (!per_cu->imported_symtabs_empty ()) |
| 9597 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
| 9598 | { |
| 9599 | recursively_compute_inclusions (result, all_children, |
| 9600 | all_type_symtabs, ptr, cust); |
| 9601 | } |
| 9602 | } |
| 9603 | |
| 9604 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
| 9605 | PER_CU. */ |
| 9606 | |
| 9607 | static void |
| 9608 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
| 9609 | { |
| 9610 | gdb_assert (! per_cu->is_debug_types); |
| 9611 | |
| 9612 | if (!per_cu->imported_symtabs_empty ()) |
| 9613 | { |
| 9614 | int len; |
| 9615 | std::vector<compunit_symtab *> result_symtabs; |
| 9616 | htab_t all_children, all_type_symtabs; |
| 9617 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
| 9618 | |
| 9619 | /* If we don't have a symtab, we can just skip this case. */ |
| 9620 | if (cust == NULL) |
| 9621 | return; |
| 9622 | |
| 9623 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
| 9624 | NULL, xcalloc, xfree); |
| 9625 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
| 9626 | NULL, xcalloc, xfree); |
| 9627 | |
| 9628 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
| 9629 | { |
| 9630 | recursively_compute_inclusions (&result_symtabs, all_children, |
| 9631 | all_type_symtabs, ptr, cust); |
| 9632 | } |
| 9633 | |
| 9634 | /* Now we have a transitive closure of all the included symtabs. */ |
| 9635 | len = result_symtabs.size (); |
| 9636 | cust->includes |
| 9637 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
| 9638 | struct compunit_symtab *, len + 1); |
| 9639 | memcpy (cust->includes, result_symtabs.data (), |
| 9640 | len * sizeof (compunit_symtab *)); |
| 9641 | cust->includes[len] = NULL; |
| 9642 | |
| 9643 | htab_delete (all_children); |
| 9644 | htab_delete (all_type_symtabs); |
| 9645 | } |
| 9646 | } |
| 9647 | |
| 9648 | /* Compute the 'includes' field for the symtabs of all the CUs we just |
| 9649 | read. */ |
| 9650 | |
| 9651 | static void |
| 9652 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 9653 | { |
| 9654 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
| 9655 | { |
| 9656 | if (! iter->is_debug_types) |
| 9657 | compute_compunit_symtab_includes (iter); |
| 9658 | } |
| 9659 | |
| 9660 | dwarf2_per_objfile->just_read_cus.clear (); |
| 9661 | } |
| 9662 | |
| 9663 | /* Generate full symbol information for PER_CU, whose DIEs have |
| 9664 | already been loaded into memory. */ |
| 9665 | |
| 9666 | static void |
| 9667 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 9668 | enum language pretend_language) |
| 9669 | { |
| 9670 | struct dwarf2_cu *cu = per_cu->cu; |
| 9671 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 9672 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 9673 | struct gdbarch *gdbarch = objfile->arch (); |
| 9674 | CORE_ADDR lowpc, highpc; |
| 9675 | struct compunit_symtab *cust; |
| 9676 | CORE_ADDR baseaddr; |
| 9677 | struct block *static_block; |
| 9678 | CORE_ADDR addr; |
| 9679 | |
| 9680 | baseaddr = objfile->text_section_offset (); |
| 9681 | |
| 9682 | /* Clear the list here in case something was left over. */ |
| 9683 | cu->method_list.clear (); |
| 9684 | |
| 9685 | cu->language = pretend_language; |
| 9686 | cu->language_defn = language_def (cu->language); |
| 9687 | |
| 9688 | /* Do line number decoding in read_file_scope () */ |
| 9689 | process_die (cu->dies, cu); |
| 9690 | |
| 9691 | /* For now fudge the Go package. */ |
| 9692 | if (cu->language == language_go) |
| 9693 | fixup_go_packaging (cu); |
| 9694 | |
| 9695 | /* Now that we have processed all the DIEs in the CU, all the types |
| 9696 | should be complete, and it should now be safe to compute all of the |
| 9697 | physnames. */ |
| 9698 | compute_delayed_physnames (cu); |
| 9699 | |
| 9700 | if (cu->language == language_rust) |
| 9701 | rust_union_quirks (cu); |
| 9702 | |
| 9703 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
| 9704 | compilation unit. If the DW_AT_high_pc is missing, synthesize |
| 9705 | it, by scanning the DIE's below the compilation unit. */ |
| 9706 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
| 9707 | |
| 9708 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 9709 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
| 9710 | |
| 9711 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. |
| 9712 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs |
| 9713 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's |
| 9714 | addrmap to help ensure it has an accurate map of pc values belonging to |
| 9715 | this comp unit. */ |
| 9716 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); |
| 9717 | |
| 9718 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
| 9719 | SECT_OFF_TEXT (objfile), |
| 9720 | 0); |
| 9721 | |
| 9722 | if (cust != NULL) |
| 9723 | { |
| 9724 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
| 9725 | |
| 9726 | /* Set symtab language to language from DW_AT_language. If the |
| 9727 | compilation is from a C file generated by language preprocessors, do |
| 9728 | not set the language if it was already deduced by start_subfile. */ |
| 9729 | if (!(cu->language == language_c |
| 9730 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
| 9731 | COMPUNIT_FILETABS (cust)->language = cu->language; |
| 9732 | |
| 9733 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can |
| 9734 | produce DW_AT_location with location lists but it can be possibly |
| 9735 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
| 9736 | there were bugs in prologue debug info, fixed later in GCC-4.5 |
| 9737 | by "unwind info for epilogues" patch (which is not directly related). |
| 9738 | |
| 9739 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not |
| 9740 | needed, it would be wrong due to missing DW_AT_producer there. |
| 9741 | |
| 9742 | Still one can confuse GDB by using non-standard GCC compilation |
| 9743 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). |
| 9744 | */ |
| 9745 | if (cu->has_loclist && gcc_4_minor >= 5) |
| 9746 | cust->locations_valid = 1; |
| 9747 | |
| 9748 | if (gcc_4_minor >= 5) |
| 9749 | cust->epilogue_unwind_valid = 1; |
| 9750 | |
| 9751 | cust->call_site_htab = cu->call_site_htab; |
| 9752 | } |
| 9753 | |
| 9754 | if (dwarf2_per_objfile->using_index) |
| 9755 | per_cu->v.quick->compunit_symtab = cust; |
| 9756 | else |
| 9757 | { |
| 9758 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
| 9759 | pst->compunit_symtab = cust; |
| 9760 | pst->readin = true; |
| 9761 | } |
| 9762 | |
| 9763 | /* Push it for inclusion processing later. */ |
| 9764 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
| 9765 | |
| 9766 | /* Not needed any more. */ |
| 9767 | cu->reset_builder (); |
| 9768 | } |
| 9769 | |
| 9770 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
| 9771 | already been loaded into memory. */ |
| 9772 | |
| 9773 | static void |
| 9774 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, |
| 9775 | enum language pretend_language) |
| 9776 | { |
| 9777 | struct dwarf2_cu *cu = per_cu->cu; |
| 9778 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 9779 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 9780 | struct compunit_symtab *cust; |
| 9781 | struct signatured_type *sig_type; |
| 9782 | |
| 9783 | gdb_assert (per_cu->is_debug_types); |
| 9784 | sig_type = (struct signatured_type *) per_cu; |
| 9785 | |
| 9786 | /* Clear the list here in case something was left over. */ |
| 9787 | cu->method_list.clear (); |
| 9788 | |
| 9789 | cu->language = pretend_language; |
| 9790 | cu->language_defn = language_def (cu->language); |
| 9791 | |
| 9792 | /* The symbol tables are set up in read_type_unit_scope. */ |
| 9793 | process_die (cu->dies, cu); |
| 9794 | |
| 9795 | /* For now fudge the Go package. */ |
| 9796 | if (cu->language == language_go) |
| 9797 | fixup_go_packaging (cu); |
| 9798 | |
| 9799 | /* Now that we have processed all the DIEs in the CU, all the types |
| 9800 | should be complete, and it should now be safe to compute all of the |
| 9801 | physnames. */ |
| 9802 | compute_delayed_physnames (cu); |
| 9803 | |
| 9804 | if (cu->language == language_rust) |
| 9805 | rust_union_quirks (cu); |
| 9806 | |
| 9807 | /* TUs share symbol tables. |
| 9808 | If this is the first TU to use this symtab, complete the construction |
| 9809 | of it with end_expandable_symtab. Otherwise, complete the addition of |
| 9810 | this TU's symbols to the existing symtab. */ |
| 9811 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
| 9812 | { |
| 9813 | buildsym_compunit *builder = cu->get_builder (); |
| 9814 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
| 9815 | sig_type->type_unit_group->compunit_symtab = cust; |
| 9816 | |
| 9817 | if (cust != NULL) |
| 9818 | { |
| 9819 | /* Set symtab language to language from DW_AT_language. If the |
| 9820 | compilation is from a C file generated by language preprocessors, |
| 9821 | do not set the language if it was already deduced by |
| 9822 | start_subfile. */ |
| 9823 | if (!(cu->language == language_c |
| 9824 | && COMPUNIT_FILETABS (cust)->language != language_c)) |
| 9825 | COMPUNIT_FILETABS (cust)->language = cu->language; |
| 9826 | } |
| 9827 | } |
| 9828 | else |
| 9829 | { |
| 9830 | cu->get_builder ()->augment_type_symtab (); |
| 9831 | cust = sig_type->type_unit_group->compunit_symtab; |
| 9832 | } |
| 9833 | |
| 9834 | if (dwarf2_per_objfile->using_index) |
| 9835 | per_cu->v.quick->compunit_symtab = cust; |
| 9836 | else |
| 9837 | { |
| 9838 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
| 9839 | pst->compunit_symtab = cust; |
| 9840 | pst->readin = true; |
| 9841 | } |
| 9842 | |
| 9843 | /* Not needed any more. */ |
| 9844 | cu->reset_builder (); |
| 9845 | } |
| 9846 | |
| 9847 | /* Process an imported unit DIE. */ |
| 9848 | |
| 9849 | static void |
| 9850 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) |
| 9851 | { |
| 9852 | struct attribute *attr; |
| 9853 | |
| 9854 | /* For now we don't handle imported units in type units. */ |
| 9855 | if (cu->per_cu->is_debug_types) |
| 9856 | { |
| 9857 | error (_("Dwarf Error: DW_TAG_imported_unit is not" |
| 9858 | " supported in type units [in module %s]"), |
| 9859 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 9860 | } |
| 9861 | |
| 9862 | attr = dwarf2_attr (die, DW_AT_import, cu); |
| 9863 | if (attr != NULL) |
| 9864 | { |
| 9865 | sect_offset sect_off = attr->get_ref_die_offset (); |
| 9866 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
| 9867 | dwarf2_per_cu_data *per_cu |
| 9868 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
| 9869 | cu->per_cu->dwarf2_per_objfile); |
| 9870 | |
| 9871 | /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit |
| 9872 | into another compilation unit, at root level. Regard this as a hint, |
| 9873 | and ignore it. */ |
| 9874 | if (die->parent && die->parent->parent == NULL |
| 9875 | && per_cu->unit_type == DW_UT_compile |
| 9876 | && per_cu->lang == language_cplus) |
| 9877 | return; |
| 9878 | |
| 9879 | /* If necessary, add it to the queue and load its DIEs. */ |
| 9880 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
| 9881 | load_full_comp_unit (per_cu, false, cu->language); |
| 9882 | |
| 9883 | cu->per_cu->imported_symtabs_push (per_cu); |
| 9884 | } |
| 9885 | } |
| 9886 | |
| 9887 | /* RAII object that represents a process_die scope: i.e., |
| 9888 | starts/finishes processing a DIE. */ |
| 9889 | class process_die_scope |
| 9890 | { |
| 9891 | public: |
| 9892 | process_die_scope (die_info *die, dwarf2_cu *cu) |
| 9893 | : m_die (die), m_cu (cu) |
| 9894 | { |
| 9895 | /* We should only be processing DIEs not already in process. */ |
| 9896 | gdb_assert (!m_die->in_process); |
| 9897 | m_die->in_process = true; |
| 9898 | } |
| 9899 | |
| 9900 | ~process_die_scope () |
| 9901 | { |
| 9902 | m_die->in_process = false; |
| 9903 | |
| 9904 | /* If we're done processing the DIE for the CU that owns the line |
| 9905 | header, we don't need the line header anymore. */ |
| 9906 | if (m_cu->line_header_die_owner == m_die) |
| 9907 | { |
| 9908 | delete m_cu->line_header; |
| 9909 | m_cu->line_header = NULL; |
| 9910 | m_cu->line_header_die_owner = NULL; |
| 9911 | } |
| 9912 | } |
| 9913 | |
| 9914 | private: |
| 9915 | die_info *m_die; |
| 9916 | dwarf2_cu *m_cu; |
| 9917 | }; |
| 9918 | |
| 9919 | /* Process a die and its children. */ |
| 9920 | |
| 9921 | static void |
| 9922 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
| 9923 | { |
| 9924 | process_die_scope scope (die, cu); |
| 9925 | |
| 9926 | switch (die->tag) |
| 9927 | { |
| 9928 | case DW_TAG_padding: |
| 9929 | break; |
| 9930 | case DW_TAG_compile_unit: |
| 9931 | case DW_TAG_partial_unit: |
| 9932 | read_file_scope (die, cu); |
| 9933 | break; |
| 9934 | case DW_TAG_type_unit: |
| 9935 | read_type_unit_scope (die, cu); |
| 9936 | break; |
| 9937 | case DW_TAG_subprogram: |
| 9938 | /* Nested subprograms in Fortran get a prefix. */ |
| 9939 | if (cu->language == language_fortran |
| 9940 | && die->parent != NULL |
| 9941 | && die->parent->tag == DW_TAG_subprogram) |
| 9942 | cu->processing_has_namespace_info = true; |
| 9943 | /* Fall through. */ |
| 9944 | case DW_TAG_inlined_subroutine: |
| 9945 | read_func_scope (die, cu); |
| 9946 | break; |
| 9947 | case DW_TAG_lexical_block: |
| 9948 | case DW_TAG_try_block: |
| 9949 | case DW_TAG_catch_block: |
| 9950 | read_lexical_block_scope (die, cu); |
| 9951 | break; |
| 9952 | case DW_TAG_call_site: |
| 9953 | case DW_TAG_GNU_call_site: |
| 9954 | read_call_site_scope (die, cu); |
| 9955 | break; |
| 9956 | case DW_TAG_class_type: |
| 9957 | case DW_TAG_interface_type: |
| 9958 | case DW_TAG_structure_type: |
| 9959 | case DW_TAG_union_type: |
| 9960 | process_structure_scope (die, cu); |
| 9961 | break; |
| 9962 | case DW_TAG_enumeration_type: |
| 9963 | process_enumeration_scope (die, cu); |
| 9964 | break; |
| 9965 | |
| 9966 | /* These dies have a type, but processing them does not create |
| 9967 | a symbol or recurse to process the children. Therefore we can |
| 9968 | read them on-demand through read_type_die. */ |
| 9969 | case DW_TAG_subroutine_type: |
| 9970 | case DW_TAG_set_type: |
| 9971 | case DW_TAG_array_type: |
| 9972 | case DW_TAG_pointer_type: |
| 9973 | case DW_TAG_ptr_to_member_type: |
| 9974 | case DW_TAG_reference_type: |
| 9975 | case DW_TAG_rvalue_reference_type: |
| 9976 | case DW_TAG_string_type: |
| 9977 | break; |
| 9978 | |
| 9979 | case DW_TAG_base_type: |
| 9980 | case DW_TAG_subrange_type: |
| 9981 | case DW_TAG_typedef: |
| 9982 | /* Add a typedef symbol for the type definition, if it has a |
| 9983 | DW_AT_name. */ |
| 9984 | new_symbol (die, read_type_die (die, cu), cu); |
| 9985 | break; |
| 9986 | case DW_TAG_common_block: |
| 9987 | read_common_block (die, cu); |
| 9988 | break; |
| 9989 | case DW_TAG_common_inclusion: |
| 9990 | break; |
| 9991 | case DW_TAG_namespace: |
| 9992 | cu->processing_has_namespace_info = true; |
| 9993 | read_namespace (die, cu); |
| 9994 | break; |
| 9995 | case DW_TAG_module: |
| 9996 | cu->processing_has_namespace_info = true; |
| 9997 | read_module (die, cu); |
| 9998 | break; |
| 9999 | case DW_TAG_imported_declaration: |
| 10000 | cu->processing_has_namespace_info = true; |
| 10001 | if (read_namespace_alias (die, cu)) |
| 10002 | break; |
| 10003 | /* The declaration is not a global namespace alias. */ |
| 10004 | /* Fall through. */ |
| 10005 | case DW_TAG_imported_module: |
| 10006 | cu->processing_has_namespace_info = true; |
| 10007 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
| 10008 | || cu->language != language_fortran)) |
| 10009 | complaint (_("Tag '%s' has unexpected children"), |
| 10010 | dwarf_tag_name (die->tag)); |
| 10011 | read_import_statement (die, cu); |
| 10012 | break; |
| 10013 | |
| 10014 | case DW_TAG_imported_unit: |
| 10015 | process_imported_unit_die (die, cu); |
| 10016 | break; |
| 10017 | |
| 10018 | case DW_TAG_variable: |
| 10019 | read_variable (die, cu); |
| 10020 | break; |
| 10021 | |
| 10022 | default: |
| 10023 | new_symbol (die, NULL, cu); |
| 10024 | break; |
| 10025 | } |
| 10026 | } |
| 10027 | \f |
| 10028 | /* DWARF name computation. */ |
| 10029 | |
| 10030 | /* A helper function for dwarf2_compute_name which determines whether DIE |
| 10031 | needs to have the name of the scope prepended to the name listed in the |
| 10032 | die. */ |
| 10033 | |
| 10034 | static int |
| 10035 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) |
| 10036 | { |
| 10037 | struct attribute *attr; |
| 10038 | |
| 10039 | switch (die->tag) |
| 10040 | { |
| 10041 | case DW_TAG_namespace: |
| 10042 | case DW_TAG_typedef: |
| 10043 | case DW_TAG_class_type: |
| 10044 | case DW_TAG_interface_type: |
| 10045 | case DW_TAG_structure_type: |
| 10046 | case DW_TAG_union_type: |
| 10047 | case DW_TAG_enumeration_type: |
| 10048 | case DW_TAG_enumerator: |
| 10049 | case DW_TAG_subprogram: |
| 10050 | case DW_TAG_inlined_subroutine: |
| 10051 | case DW_TAG_member: |
| 10052 | case DW_TAG_imported_declaration: |
| 10053 | return 1; |
| 10054 | |
| 10055 | case DW_TAG_variable: |
| 10056 | case DW_TAG_constant: |
| 10057 | /* We only need to prefix "globally" visible variables. These include |
| 10058 | any variable marked with DW_AT_external or any variable that |
| 10059 | lives in a namespace. [Variables in anonymous namespaces |
| 10060 | require prefixing, but they are not DW_AT_external.] */ |
| 10061 | |
| 10062 | if (dwarf2_attr (die, DW_AT_specification, cu)) |
| 10063 | { |
| 10064 | struct dwarf2_cu *spec_cu = cu; |
| 10065 | |
| 10066 | return die_needs_namespace (die_specification (die, &spec_cu), |
| 10067 | spec_cu); |
| 10068 | } |
| 10069 | |
| 10070 | attr = dwarf2_attr (die, DW_AT_external, cu); |
| 10071 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
| 10072 | && die->parent->tag != DW_TAG_module) |
| 10073 | return 0; |
| 10074 | /* A variable in a lexical block of some kind does not need a |
| 10075 | namespace, even though in C++ such variables may be external |
| 10076 | and have a mangled name. */ |
| 10077 | if (die->parent->tag == DW_TAG_lexical_block |
| 10078 | || die->parent->tag == DW_TAG_try_block |
| 10079 | || die->parent->tag == DW_TAG_catch_block |
| 10080 | || die->parent->tag == DW_TAG_subprogram) |
| 10081 | return 0; |
| 10082 | return 1; |
| 10083 | |
| 10084 | default: |
| 10085 | return 0; |
| 10086 | } |
| 10087 | } |
| 10088 | |
| 10089 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
| 10090 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not |
| 10091 | defined for the given DIE. */ |
| 10092 | |
| 10093 | static struct attribute * |
| 10094 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) |
| 10095 | { |
| 10096 | struct attribute *attr; |
| 10097 | |
| 10098 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); |
| 10099 | if (attr == NULL) |
| 10100 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); |
| 10101 | |
| 10102 | return attr; |
| 10103 | } |
| 10104 | |
| 10105 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name |
| 10106 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not |
| 10107 | defined for the given DIE. */ |
| 10108 | |
| 10109 | static const char * |
| 10110 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) |
| 10111 | { |
| 10112 | const char *linkage_name; |
| 10113 | |
| 10114 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
| 10115 | if (linkage_name == NULL) |
| 10116 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); |
| 10117 | |
| 10118 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
| 10119 | See https://github.com/rust-lang/rust/issues/32925. */ |
| 10120 | if (cu->language == language_rust && linkage_name != NULL |
| 10121 | && strchr (linkage_name, '{') != NULL) |
| 10122 | linkage_name = NULL; |
| 10123 | |
| 10124 | return linkage_name; |
| 10125 | } |
| 10126 | |
| 10127 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
| 10128 | compute the physname for the object, which include a method's: |
| 10129 | - formal parameters (C++), |
| 10130 | - receiver type (Go), |
| 10131 | |
| 10132 | The term "physname" is a bit confusing. |
| 10133 | For C++, for example, it is the demangled name. |
| 10134 | For Go, for example, it's the mangled name. |
| 10135 | |
| 10136 | For Ada, return the DIE's linkage name rather than the fully qualified |
| 10137 | name. PHYSNAME is ignored.. |
| 10138 | |
| 10139 | The result is allocated on the objfile_obstack and canonicalized. */ |
| 10140 | |
| 10141 | static const char * |
| 10142 | dwarf2_compute_name (const char *name, |
| 10143 | struct die_info *die, struct dwarf2_cu *cu, |
| 10144 | int physname) |
| 10145 | { |
| 10146 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10147 | |
| 10148 | if (name == NULL) |
| 10149 | name = dwarf2_name (die, cu); |
| 10150 | |
| 10151 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
| 10152 | but otherwise compute it by typename_concat inside GDB. |
| 10153 | FIXME: Actually this is not really true, or at least not always true. |
| 10154 | It's all very confusing. compute_and_set_names doesn't try to demangle |
| 10155 | Fortran names because there is no mangling standard. So new_symbol |
| 10156 | will set the demangled name to the result of dwarf2_full_name, and it is |
| 10157 | the demangled name that GDB uses if it exists. */ |
| 10158 | if (cu->language == language_ada |
| 10159 | || (cu->language == language_fortran && physname)) |
| 10160 | { |
| 10161 | /* For Ada unit, we prefer the linkage name over the name, as |
| 10162 | the former contains the exported name, which the user expects |
| 10163 | to be able to reference. Ideally, we want the user to be able |
| 10164 | to reference this entity using either natural or linkage name, |
| 10165 | but we haven't started looking at this enhancement yet. */ |
| 10166 | const char *linkage_name = dw2_linkage_name (die, cu); |
| 10167 | |
| 10168 | if (linkage_name != NULL) |
| 10169 | return linkage_name; |
| 10170 | } |
| 10171 | |
| 10172 | /* These are the only languages we know how to qualify names in. */ |
| 10173 | if (name != NULL |
| 10174 | && (cu->language == language_cplus |
| 10175 | || cu->language == language_fortran || cu->language == language_d |
| 10176 | || cu->language == language_rust)) |
| 10177 | { |
| 10178 | if (die_needs_namespace (die, cu)) |
| 10179 | { |
| 10180 | const char *prefix; |
| 10181 | const char *canonical_name = NULL; |
| 10182 | |
| 10183 | string_file buf; |
| 10184 | |
| 10185 | prefix = determine_prefix (die, cu); |
| 10186 | if (*prefix != '\0') |
| 10187 | { |
| 10188 | gdb::unique_xmalloc_ptr<char> prefixed_name |
| 10189 | (typename_concat (NULL, prefix, name, physname, cu)); |
| 10190 | |
| 10191 | buf.puts (prefixed_name.get ()); |
| 10192 | } |
| 10193 | else |
| 10194 | buf.puts (name); |
| 10195 | |
| 10196 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
| 10197 | as children with DW_TAG_template_type_param or |
| 10198 | DW_TAG_value_type_param. If the latter, add them to the name |
| 10199 | here. If the name already has template parameters, then |
| 10200 | skip this step; some versions of GCC emit both, and |
| 10201 | it is more efficient to use the pre-computed name. |
| 10202 | |
| 10203 | Something to keep in mind about this process: it is very |
| 10204 | unlikely, or in some cases downright impossible, to produce |
| 10205 | something that will match the mangled name of a function. |
| 10206 | If the definition of the function has the same debug info, |
| 10207 | we should be able to match up with it anyway. But fallbacks |
| 10208 | using the minimal symbol, for instance to find a method |
| 10209 | implemented in a stripped copy of libstdc++, will not work. |
| 10210 | If we do not have debug info for the definition, we will have to |
| 10211 | match them up some other way. |
| 10212 | |
| 10213 | When we do name matching there is a related problem with function |
| 10214 | templates; two instantiated function templates are allowed to |
| 10215 | differ only by their return types, which we do not add here. */ |
| 10216 | |
| 10217 | if (cu->language == language_cplus && strchr (name, '<') == NULL) |
| 10218 | { |
| 10219 | struct attribute *attr; |
| 10220 | struct die_info *child; |
| 10221 | int first = 1; |
| 10222 | |
| 10223 | die->building_fullname = 1; |
| 10224 | |
| 10225 | for (child = die->child; child != NULL; child = child->sibling) |
| 10226 | { |
| 10227 | struct type *type; |
| 10228 | LONGEST value; |
| 10229 | const gdb_byte *bytes; |
| 10230 | struct dwarf2_locexpr_baton *baton; |
| 10231 | struct value *v; |
| 10232 | |
| 10233 | if (child->tag != DW_TAG_template_type_param |
| 10234 | && child->tag != DW_TAG_template_value_param) |
| 10235 | continue; |
| 10236 | |
| 10237 | if (first) |
| 10238 | { |
| 10239 | buf.puts ("<"); |
| 10240 | first = 0; |
| 10241 | } |
| 10242 | else |
| 10243 | buf.puts (", "); |
| 10244 | |
| 10245 | attr = dwarf2_attr (child, DW_AT_type, cu); |
| 10246 | if (attr == NULL) |
| 10247 | { |
| 10248 | complaint (_("template parameter missing DW_AT_type")); |
| 10249 | buf.puts ("UNKNOWN_TYPE"); |
| 10250 | continue; |
| 10251 | } |
| 10252 | type = die_type (child, cu); |
| 10253 | |
| 10254 | if (child->tag == DW_TAG_template_type_param) |
| 10255 | { |
| 10256 | c_print_type (type, "", &buf, -1, 0, cu->language, |
| 10257 | &type_print_raw_options); |
| 10258 | continue; |
| 10259 | } |
| 10260 | |
| 10261 | attr = dwarf2_attr (child, DW_AT_const_value, cu); |
| 10262 | if (attr == NULL) |
| 10263 | { |
| 10264 | complaint (_("template parameter missing " |
| 10265 | "DW_AT_const_value")); |
| 10266 | buf.puts ("UNKNOWN_VALUE"); |
| 10267 | continue; |
| 10268 | } |
| 10269 | |
| 10270 | dwarf2_const_value_attr (attr, type, name, |
| 10271 | &cu->comp_unit_obstack, cu, |
| 10272 | &value, &bytes, &baton); |
| 10273 | |
| 10274 | if (TYPE_NOSIGN (type)) |
| 10275 | /* GDB prints characters as NUMBER 'CHAR'. If that's |
| 10276 | changed, this can use value_print instead. */ |
| 10277 | c_printchar (value, type, &buf); |
| 10278 | else |
| 10279 | { |
| 10280 | struct value_print_options opts; |
| 10281 | |
| 10282 | if (baton != NULL) |
| 10283 | v = dwarf2_evaluate_loc_desc (type, NULL, |
| 10284 | baton->data, |
| 10285 | baton->size, |
| 10286 | baton->per_cu); |
| 10287 | else if (bytes != NULL) |
| 10288 | { |
| 10289 | v = allocate_value (type); |
| 10290 | memcpy (value_contents_writeable (v), bytes, |
| 10291 | TYPE_LENGTH (type)); |
| 10292 | } |
| 10293 | else |
| 10294 | v = value_from_longest (type, value); |
| 10295 | |
| 10296 | /* Specify decimal so that we do not depend on |
| 10297 | the radix. */ |
| 10298 | get_formatted_print_options (&opts, 'd'); |
| 10299 | opts.raw = 1; |
| 10300 | value_print (v, &buf, &opts); |
| 10301 | release_value (v); |
| 10302 | } |
| 10303 | } |
| 10304 | |
| 10305 | die->building_fullname = 0; |
| 10306 | |
| 10307 | if (!first) |
| 10308 | { |
| 10309 | /* Close the argument list, with a space if necessary |
| 10310 | (nested templates). */ |
| 10311 | if (!buf.empty () && buf.string ().back () == '>') |
| 10312 | buf.puts (" >"); |
| 10313 | else |
| 10314 | buf.puts (">"); |
| 10315 | } |
| 10316 | } |
| 10317 | |
| 10318 | /* For C++ methods, append formal parameter type |
| 10319 | information, if PHYSNAME. */ |
| 10320 | |
| 10321 | if (physname && die->tag == DW_TAG_subprogram |
| 10322 | && cu->language == language_cplus) |
| 10323 | { |
| 10324 | struct type *type = read_type_die (die, cu); |
| 10325 | |
| 10326 | c_type_print_args (type, &buf, 1, cu->language, |
| 10327 | &type_print_raw_options); |
| 10328 | |
| 10329 | if (cu->language == language_cplus) |
| 10330 | { |
| 10331 | /* Assume that an artificial first parameter is |
| 10332 | "this", but do not crash if it is not. RealView |
| 10333 | marks unnamed (and thus unused) parameters as |
| 10334 | artificial; there is no way to differentiate |
| 10335 | the two cases. */ |
| 10336 | if (type->num_fields () > 0 |
| 10337 | && TYPE_FIELD_ARTIFICIAL (type, 0) |
| 10338 | && TYPE_FIELD_TYPE (type, 0)->code () == TYPE_CODE_PTR |
| 10339 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
| 10340 | 0)))) |
| 10341 | buf.puts (" const"); |
| 10342 | } |
| 10343 | } |
| 10344 | |
| 10345 | const std::string &intermediate_name = buf.string (); |
| 10346 | |
| 10347 | if (cu->language == language_cplus) |
| 10348 | canonical_name |
| 10349 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
| 10350 | objfile); |
| 10351 | |
| 10352 | /* If we only computed INTERMEDIATE_NAME, or if |
| 10353 | INTERMEDIATE_NAME is already canonical, then we need to |
| 10354 | intern it. */ |
| 10355 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
| 10356 | name = objfile->intern (intermediate_name); |
| 10357 | else |
| 10358 | name = canonical_name; |
| 10359 | } |
| 10360 | } |
| 10361 | |
| 10362 | return name; |
| 10363 | } |
| 10364 | |
| 10365 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
| 10366 | If scope qualifiers are appropriate they will be added. The result |
| 10367 | will be allocated on the storage_obstack, or NULL if the DIE does |
| 10368 | not have a name. NAME may either be from a previous call to |
| 10369 | dwarf2_name or NULL. |
| 10370 | |
| 10371 | The output string will be canonicalized (if C++). */ |
| 10372 | |
| 10373 | static const char * |
| 10374 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
| 10375 | { |
| 10376 | return dwarf2_compute_name (name, die, cu, 0); |
| 10377 | } |
| 10378 | |
| 10379 | /* Construct a physname for the given DIE in CU. NAME may either be |
| 10380 | from a previous call to dwarf2_name or NULL. The result will be |
| 10381 | allocated on the objfile_objstack or NULL if the DIE does not have a |
| 10382 | name. |
| 10383 | |
| 10384 | The output string will be canonicalized (if C++). */ |
| 10385 | |
| 10386 | static const char * |
| 10387 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
| 10388 | { |
| 10389 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10390 | const char *retval, *mangled = NULL, *canon = NULL; |
| 10391 | int need_copy = 1; |
| 10392 | |
| 10393 | /* In this case dwarf2_compute_name is just a shortcut not building anything |
| 10394 | on its own. */ |
| 10395 | if (!die_needs_namespace (die, cu)) |
| 10396 | return dwarf2_compute_name (name, die, cu, 1); |
| 10397 | |
| 10398 | if (cu->language != language_rust) |
| 10399 | mangled = dw2_linkage_name (die, cu); |
| 10400 | |
| 10401 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
| 10402 | has computed. */ |
| 10403 | gdb::unique_xmalloc_ptr<char> demangled; |
| 10404 | if (mangled != NULL) |
| 10405 | { |
| 10406 | |
| 10407 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
| 10408 | { |
| 10409 | /* Do nothing (do not demangle the symbol name). */ |
| 10410 | } |
| 10411 | else if (cu->language == language_go) |
| 10412 | { |
| 10413 | /* This is a lie, but we already lie to the caller new_symbol. |
| 10414 | new_symbol assumes we return the mangled name. |
| 10415 | This just undoes that lie until things are cleaned up. */ |
| 10416 | } |
| 10417 | else |
| 10418 | { |
| 10419 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
| 10420 | their return type. It is easier for GDB users to search |
| 10421 | for such functions as `name(params)' than `long name(params)'. |
| 10422 | In such case the minimal symbol names do not match the full |
| 10423 | symbol names but for template functions there is never a need |
| 10424 | to look up their definition from their declaration so |
| 10425 | the only disadvantage remains the minimal symbol variant |
| 10426 | `long name(params)' does not have the proper inferior type. */ |
| 10427 | demangled.reset (gdb_demangle (mangled, |
| 10428 | (DMGL_PARAMS | DMGL_ANSI |
| 10429 | | DMGL_RET_DROP))); |
| 10430 | } |
| 10431 | if (demangled) |
| 10432 | canon = demangled.get (); |
| 10433 | else |
| 10434 | { |
| 10435 | canon = mangled; |
| 10436 | need_copy = 0; |
| 10437 | } |
| 10438 | } |
| 10439 | |
| 10440 | if (canon == NULL || check_physname) |
| 10441 | { |
| 10442 | const char *physname = dwarf2_compute_name (name, die, cu, 1); |
| 10443 | |
| 10444 | if (canon != NULL && strcmp (physname, canon) != 0) |
| 10445 | { |
| 10446 | /* It may not mean a bug in GDB. The compiler could also |
| 10447 | compute DW_AT_linkage_name incorrectly. But in such case |
| 10448 | GDB would need to be bug-to-bug compatible. */ |
| 10449 | |
| 10450 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
| 10451 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
| 10452 | physname, canon, mangled, sect_offset_str (die->sect_off), |
| 10453 | objfile_name (objfile)); |
| 10454 | |
| 10455 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it |
| 10456 | is available here - over computed PHYSNAME. It is safer |
| 10457 | against both buggy GDB and buggy compilers. */ |
| 10458 | |
| 10459 | retval = canon; |
| 10460 | } |
| 10461 | else |
| 10462 | { |
| 10463 | retval = physname; |
| 10464 | need_copy = 0; |
| 10465 | } |
| 10466 | } |
| 10467 | else |
| 10468 | retval = canon; |
| 10469 | |
| 10470 | if (need_copy) |
| 10471 | retval = objfile->intern (retval); |
| 10472 | |
| 10473 | return retval; |
| 10474 | } |
| 10475 | |
| 10476 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
| 10477 | a new symbol for it. |
| 10478 | |
| 10479 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ |
| 10480 | |
| 10481 | static int |
| 10482 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) |
| 10483 | { |
| 10484 | struct attribute *attr; |
| 10485 | |
| 10486 | /* If the die does not have a name, this is not a namespace |
| 10487 | alias. */ |
| 10488 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 10489 | if (attr != NULL) |
| 10490 | { |
| 10491 | int num; |
| 10492 | struct die_info *d = die; |
| 10493 | struct dwarf2_cu *imported_cu = cu; |
| 10494 | |
| 10495 | /* If the compiler has nested DW_AT_imported_declaration DIEs, |
| 10496 | keep inspecting DIEs until we hit the underlying import. */ |
| 10497 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 |
| 10498 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) |
| 10499 | { |
| 10500 | attr = dwarf2_attr (d, DW_AT_import, cu); |
| 10501 | if (attr == NULL) |
| 10502 | break; |
| 10503 | |
| 10504 | d = follow_die_ref (d, attr, &imported_cu); |
| 10505 | if (d->tag != DW_TAG_imported_declaration) |
| 10506 | break; |
| 10507 | } |
| 10508 | |
| 10509 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) |
| 10510 | { |
| 10511 | complaint (_("DIE at %s has too many recursively imported " |
| 10512 | "declarations"), sect_offset_str (d->sect_off)); |
| 10513 | return 0; |
| 10514 | } |
| 10515 | |
| 10516 | if (attr != NULL) |
| 10517 | { |
| 10518 | struct type *type; |
| 10519 | sect_offset sect_off = attr->get_ref_die_offset (); |
| 10520 | |
| 10521 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
| 10522 | if (type != NULL && type->code () == TYPE_CODE_NAMESPACE) |
| 10523 | { |
| 10524 | /* This declaration is a global namespace alias. Add |
| 10525 | a symbol for it whose type is the aliased namespace. */ |
| 10526 | new_symbol (die, type, cu); |
| 10527 | return 1; |
| 10528 | } |
| 10529 | } |
| 10530 | } |
| 10531 | |
| 10532 | return 0; |
| 10533 | } |
| 10534 | |
| 10535 | /* Return the using directives repository (global or local?) to use in the |
| 10536 | current context for CU. |
| 10537 | |
| 10538 | For Ada, imported declarations can materialize renamings, which *may* be |
| 10539 | global. However it is impossible (for now?) in DWARF to distinguish |
| 10540 | "external" imported declarations and "static" ones. As all imported |
| 10541 | declarations seem to be static in all other languages, make them all CU-wide |
| 10542 | global only in Ada. */ |
| 10543 | |
| 10544 | static struct using_direct ** |
| 10545 | using_directives (struct dwarf2_cu *cu) |
| 10546 | { |
| 10547 | if (cu->language == language_ada |
| 10548 | && cu->get_builder ()->outermost_context_p ()) |
| 10549 | return cu->get_builder ()->get_global_using_directives (); |
| 10550 | else |
| 10551 | return cu->get_builder ()->get_local_using_directives (); |
| 10552 | } |
| 10553 | |
| 10554 | /* Read the import statement specified by the given die and record it. */ |
| 10555 | |
| 10556 | static void |
| 10557 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) |
| 10558 | { |
| 10559 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10560 | struct attribute *import_attr; |
| 10561 | struct die_info *imported_die, *child_die; |
| 10562 | struct dwarf2_cu *imported_cu; |
| 10563 | const char *imported_name; |
| 10564 | const char *imported_name_prefix; |
| 10565 | const char *canonical_name; |
| 10566 | const char *import_alias; |
| 10567 | const char *imported_declaration = NULL; |
| 10568 | const char *import_prefix; |
| 10569 | std::vector<const char *> excludes; |
| 10570 | |
| 10571 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
| 10572 | if (import_attr == NULL) |
| 10573 | { |
| 10574 | complaint (_("Tag '%s' has no DW_AT_import"), |
| 10575 | dwarf_tag_name (die->tag)); |
| 10576 | return; |
| 10577 | } |
| 10578 | |
| 10579 | imported_cu = cu; |
| 10580 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); |
| 10581 | imported_name = dwarf2_name (imported_die, imported_cu); |
| 10582 | if (imported_name == NULL) |
| 10583 | { |
| 10584 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 |
| 10585 | |
| 10586 | The import in the following code: |
| 10587 | namespace A |
| 10588 | { |
| 10589 | typedef int B; |
| 10590 | } |
| 10591 | |
| 10592 | int main () |
| 10593 | { |
| 10594 | using A::B; |
| 10595 | B b; |
| 10596 | return b; |
| 10597 | } |
| 10598 | |
| 10599 | ... |
| 10600 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) |
| 10601 | <52> DW_AT_decl_file : 1 |
| 10602 | <53> DW_AT_decl_line : 6 |
| 10603 | <54> DW_AT_import : <0x75> |
| 10604 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) |
| 10605 | <59> DW_AT_name : B |
| 10606 | <5b> DW_AT_decl_file : 1 |
| 10607 | <5c> DW_AT_decl_line : 2 |
| 10608 | <5d> DW_AT_type : <0x6e> |
| 10609 | ... |
| 10610 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) |
| 10611 | <76> DW_AT_byte_size : 4 |
| 10612 | <77> DW_AT_encoding : 5 (signed) |
| 10613 | |
| 10614 | imports the wrong die ( 0x75 instead of 0x58 ). |
| 10615 | This case will be ignored until the gcc bug is fixed. */ |
| 10616 | return; |
| 10617 | } |
| 10618 | |
| 10619 | /* Figure out the local name after import. */ |
| 10620 | import_alias = dwarf2_name (die, cu); |
| 10621 | |
| 10622 | /* Figure out where the statement is being imported to. */ |
| 10623 | import_prefix = determine_prefix (die, cu); |
| 10624 | |
| 10625 | /* Figure out what the scope of the imported die is and prepend it |
| 10626 | to the name of the imported die. */ |
| 10627 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
| 10628 | |
| 10629 | if (imported_die->tag != DW_TAG_namespace |
| 10630 | && imported_die->tag != DW_TAG_module) |
| 10631 | { |
| 10632 | imported_declaration = imported_name; |
| 10633 | canonical_name = imported_name_prefix; |
| 10634 | } |
| 10635 | else if (strlen (imported_name_prefix) > 0) |
| 10636 | canonical_name = obconcat (&objfile->objfile_obstack, |
| 10637 | imported_name_prefix, |
| 10638 | (cu->language == language_d ? "." : "::"), |
| 10639 | imported_name, (char *) NULL); |
| 10640 | else |
| 10641 | canonical_name = imported_name; |
| 10642 | |
| 10643 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
| 10644 | for (child_die = die->child; child_die && child_die->tag; |
| 10645 | child_die = child_die->sibling) |
| 10646 | { |
| 10647 | /* DWARF-4: A Fortran use statement with a “rename list” may be |
| 10648 | represented by an imported module entry with an import attribute |
| 10649 | referring to the module and owned entries corresponding to those |
| 10650 | entities that are renamed as part of being imported. */ |
| 10651 | |
| 10652 | if (child_die->tag != DW_TAG_imported_declaration) |
| 10653 | { |
| 10654 | complaint (_("child DW_TAG_imported_declaration expected " |
| 10655 | "- DIE at %s [in module %s]"), |
| 10656 | sect_offset_str (child_die->sect_off), |
| 10657 | objfile_name (objfile)); |
| 10658 | continue; |
| 10659 | } |
| 10660 | |
| 10661 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); |
| 10662 | if (import_attr == NULL) |
| 10663 | { |
| 10664 | complaint (_("Tag '%s' has no DW_AT_import"), |
| 10665 | dwarf_tag_name (child_die->tag)); |
| 10666 | continue; |
| 10667 | } |
| 10668 | |
| 10669 | imported_cu = cu; |
| 10670 | imported_die = follow_die_ref_or_sig (child_die, import_attr, |
| 10671 | &imported_cu); |
| 10672 | imported_name = dwarf2_name (imported_die, imported_cu); |
| 10673 | if (imported_name == NULL) |
| 10674 | { |
| 10675 | complaint (_("child DW_TAG_imported_declaration has unknown " |
| 10676 | "imported name - DIE at %s [in module %s]"), |
| 10677 | sect_offset_str (child_die->sect_off), |
| 10678 | objfile_name (objfile)); |
| 10679 | continue; |
| 10680 | } |
| 10681 | |
| 10682 | excludes.push_back (imported_name); |
| 10683 | |
| 10684 | process_die (child_die, cu); |
| 10685 | } |
| 10686 | |
| 10687 | add_using_directive (using_directives (cu), |
| 10688 | import_prefix, |
| 10689 | canonical_name, |
| 10690 | import_alias, |
| 10691 | imported_declaration, |
| 10692 | excludes, |
| 10693 | 0, |
| 10694 | &objfile->objfile_obstack); |
| 10695 | } |
| 10696 | |
| 10697 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
| 10698 | types, but gives them a size of zero. Starting with version 14, |
| 10699 | ICC is compatible with GCC. */ |
| 10700 | |
| 10701 | static bool |
| 10702 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
| 10703 | { |
| 10704 | if (!cu->checked_producer) |
| 10705 | check_producer (cu); |
| 10706 | |
| 10707 | return cu->producer_is_icc_lt_14; |
| 10708 | } |
| 10709 | |
| 10710 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
| 10711 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) |
| 10712 | which says that void functions should not have a DW_AT_type. */ |
| 10713 | |
| 10714 | static bool |
| 10715 | producer_is_icc (struct dwarf2_cu *cu) |
| 10716 | { |
| 10717 | if (!cu->checked_producer) |
| 10718 | check_producer (cu); |
| 10719 | |
| 10720 | return cu->producer_is_icc; |
| 10721 | } |
| 10722 | |
| 10723 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
| 10724 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed |
| 10725 | this, it was first present in GCC release 4.3.0. */ |
| 10726 | |
| 10727 | static bool |
| 10728 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
| 10729 | { |
| 10730 | if (!cu->checked_producer) |
| 10731 | check_producer (cu); |
| 10732 | |
| 10733 | return cu->producer_is_gcc_lt_4_3; |
| 10734 | } |
| 10735 | |
| 10736 | static file_and_directory |
| 10737 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) |
| 10738 | { |
| 10739 | file_and_directory res; |
| 10740 | |
| 10741 | /* Find the filename. Do not use dwarf2_name here, since the filename |
| 10742 | is not a source language identifier. */ |
| 10743 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
| 10744 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); |
| 10745 | |
| 10746 | if (res.comp_dir == NULL |
| 10747 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL |
| 10748 | && IS_ABSOLUTE_PATH (res.name)) |
| 10749 | { |
| 10750 | res.comp_dir_storage = ldirname (res.name); |
| 10751 | if (!res.comp_dir_storage.empty ()) |
| 10752 | res.comp_dir = res.comp_dir_storage.c_str (); |
| 10753 | } |
| 10754 | if (res.comp_dir != NULL) |
| 10755 | { |
| 10756 | /* Irix 6.2 native cc prepends <machine>.: to the compilation |
| 10757 | directory, get rid of it. */ |
| 10758 | const char *cp = strchr (res.comp_dir, ':'); |
| 10759 | |
| 10760 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
| 10761 | res.comp_dir = cp + 1; |
| 10762 | } |
| 10763 | |
| 10764 | if (res.name == NULL) |
| 10765 | res.name = "<unknown>"; |
| 10766 | |
| 10767 | return res; |
| 10768 | } |
| 10769 | |
| 10770 | /* Handle DW_AT_stmt_list for a compilation unit. |
| 10771 | DIE is the DW_TAG_compile_unit die for CU. |
| 10772 | COMP_DIR is the compilation directory. LOWPC is passed to |
| 10773 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ |
| 10774 | |
| 10775 | static void |
| 10776 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, |
| 10777 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
| 10778 | { |
| 10779 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 10780 | = cu->per_cu->dwarf2_per_objfile; |
| 10781 | struct attribute *attr; |
| 10782 | struct line_header line_header_local; |
| 10783 | hashval_t line_header_local_hash; |
| 10784 | void **slot; |
| 10785 | int decode_mapping; |
| 10786 | |
| 10787 | gdb_assert (! cu->per_cu->is_debug_types); |
| 10788 | |
| 10789 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 10790 | if (attr == NULL) |
| 10791 | return; |
| 10792 | |
| 10793 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
| 10794 | |
| 10795 | /* The line header hash table is only created if needed (it exists to |
| 10796 | prevent redundant reading of the line table for partial_units). |
| 10797 | If we're given a partial_unit, we'll need it. If we're given a |
| 10798 | compile_unit, then use the line header hash table if it's already |
| 10799 | created, but don't create one just yet. */ |
| 10800 | |
| 10801 | if (dwarf2_per_objfile->line_header_hash == NULL |
| 10802 | && die->tag == DW_TAG_partial_unit) |
| 10803 | { |
| 10804 | dwarf2_per_objfile->line_header_hash |
| 10805 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
| 10806 | line_header_eq_voidp, |
| 10807 | free_line_header_voidp, |
| 10808 | xcalloc, xfree)); |
| 10809 | } |
| 10810 | |
| 10811 | line_header_local.sect_off = line_offset; |
| 10812 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
| 10813 | line_header_local_hash = line_header_hash (&line_header_local); |
| 10814 | if (dwarf2_per_objfile->line_header_hash != NULL) |
| 10815 | { |
| 10816 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
| 10817 | &line_header_local, |
| 10818 | line_header_local_hash, NO_INSERT); |
| 10819 | |
| 10820 | /* For DW_TAG_compile_unit we need info like symtab::linetable which |
| 10821 | is not present in *SLOT (since if there is something in *SLOT then |
| 10822 | it will be for a partial_unit). */ |
| 10823 | if (die->tag == DW_TAG_partial_unit && slot != NULL) |
| 10824 | { |
| 10825 | gdb_assert (*slot != NULL); |
| 10826 | cu->line_header = (struct line_header *) *slot; |
| 10827 | return; |
| 10828 | } |
| 10829 | } |
| 10830 | |
| 10831 | /* dwarf_decode_line_header does not yet provide sufficient information. |
| 10832 | We always have to call also dwarf_decode_lines for it. */ |
| 10833 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
| 10834 | if (lh == NULL) |
| 10835 | return; |
| 10836 | |
| 10837 | cu->line_header = lh.release (); |
| 10838 | cu->line_header_die_owner = die; |
| 10839 | |
| 10840 | if (dwarf2_per_objfile->line_header_hash == NULL) |
| 10841 | slot = NULL; |
| 10842 | else |
| 10843 | { |
| 10844 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
| 10845 | &line_header_local, |
| 10846 | line_header_local_hash, INSERT); |
| 10847 | gdb_assert (slot != NULL); |
| 10848 | } |
| 10849 | if (slot != NULL && *slot == NULL) |
| 10850 | { |
| 10851 | /* This newly decoded line number information unit will be owned |
| 10852 | by line_header_hash hash table. */ |
| 10853 | *slot = cu->line_header; |
| 10854 | cu->line_header_die_owner = NULL; |
| 10855 | } |
| 10856 | else |
| 10857 | { |
| 10858 | /* We cannot free any current entry in (*slot) as that struct line_header |
| 10859 | may be already used by multiple CUs. Create only temporary decoded |
| 10860 | line_header for this CU - it may happen at most once for each line |
| 10861 | number information unit. And if we're not using line_header_hash |
| 10862 | then this is what we want as well. */ |
| 10863 | gdb_assert (die->tag != DW_TAG_partial_unit); |
| 10864 | } |
| 10865 | decode_mapping = (die->tag != DW_TAG_partial_unit); |
| 10866 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, |
| 10867 | decode_mapping); |
| 10868 | |
| 10869 | } |
| 10870 | |
| 10871 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
| 10872 | |
| 10873 | static void |
| 10874 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 10875 | { |
| 10876 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 10877 | = cu->per_cu->dwarf2_per_objfile; |
| 10878 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 10879 | struct gdbarch *gdbarch = objfile->arch (); |
| 10880 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
| 10881 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
| 10882 | struct attribute *attr; |
| 10883 | struct die_info *child_die; |
| 10884 | CORE_ADDR baseaddr; |
| 10885 | |
| 10886 | prepare_one_comp_unit (cu, die, cu->language); |
| 10887 | baseaddr = objfile->text_section_offset (); |
| 10888 | |
| 10889 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
| 10890 | |
| 10891 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 10892 | from finish_block. */ |
| 10893 | if (lowpc == ((CORE_ADDR) -1)) |
| 10894 | lowpc = highpc; |
| 10895 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 10896 | |
| 10897 | file_and_directory fnd = find_file_and_directory (die, cu); |
| 10898 | |
| 10899 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
| 10900 | standardised yet. As a workaround for the language detection we fall |
| 10901 | back to the DW_AT_producer string. */ |
| 10902 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) |
| 10903 | cu->language = language_opencl; |
| 10904 | |
| 10905 | /* Similar hack for Go. */ |
| 10906 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) |
| 10907 | set_cu_language (DW_LANG_Go, cu); |
| 10908 | |
| 10909 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
| 10910 | |
| 10911 | /* Decode line number information if present. We do this before |
| 10912 | processing child DIEs, so that the line header table is available |
| 10913 | for DW_AT_decl_file. */ |
| 10914 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
| 10915 | |
| 10916 | /* Process all dies in compilation unit. */ |
| 10917 | if (die->child != NULL) |
| 10918 | { |
| 10919 | child_die = die->child; |
| 10920 | while (child_die && child_die->tag) |
| 10921 | { |
| 10922 | process_die (child_die, cu); |
| 10923 | child_die = child_die->sibling; |
| 10924 | } |
| 10925 | } |
| 10926 | |
| 10927 | /* Decode macro information, if present. Dwarf 2 macro information |
| 10928 | refers to information in the line number info statement program |
| 10929 | header, so we can only read it if we've read the header |
| 10930 | successfully. */ |
| 10931 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
| 10932 | if (attr == NULL) |
| 10933 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); |
| 10934 | if (attr && cu->line_header) |
| 10935 | { |
| 10936 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) |
| 10937 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
| 10938 | |
| 10939 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
| 10940 | } |
| 10941 | else |
| 10942 | { |
| 10943 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); |
| 10944 | if (attr && cu->line_header) |
| 10945 | { |
| 10946 | unsigned int macro_offset = DW_UNSND (attr); |
| 10947 | |
| 10948 | dwarf_decode_macros (cu, macro_offset, 0); |
| 10949 | } |
| 10950 | } |
| 10951 | } |
| 10952 | |
| 10953 | void |
| 10954 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) |
| 10955 | { |
| 10956 | struct type_unit_group *tu_group; |
| 10957 | int first_time; |
| 10958 | struct attribute *attr; |
| 10959 | unsigned int i; |
| 10960 | struct signatured_type *sig_type; |
| 10961 | |
| 10962 | gdb_assert (per_cu->is_debug_types); |
| 10963 | sig_type = (struct signatured_type *) per_cu; |
| 10964 | |
| 10965 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
| 10966 | |
| 10967 | /* If we're using .gdb_index (includes -readnow) then |
| 10968 | per_cu->type_unit_group may not have been set up yet. */ |
| 10969 | if (sig_type->type_unit_group == NULL) |
| 10970 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
| 10971 | tu_group = sig_type->type_unit_group; |
| 10972 | |
| 10973 | /* If we've already processed this stmt_list there's no real need to |
| 10974 | do it again, we could fake it and just recreate the part we need |
| 10975 | (file name,index -> symtab mapping). If data shows this optimization |
| 10976 | is useful we can do it then. */ |
| 10977 | first_time = tu_group->compunit_symtab == NULL; |
| 10978 | |
| 10979 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad |
| 10980 | debug info. */ |
| 10981 | line_header_up lh; |
| 10982 | if (attr != NULL) |
| 10983 | { |
| 10984 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
| 10985 | lh = dwarf_decode_line_header (line_offset, this); |
| 10986 | } |
| 10987 | if (lh == NULL) |
| 10988 | { |
| 10989 | if (first_time) |
| 10990 | start_symtab ("", NULL, 0); |
| 10991 | else |
| 10992 | { |
| 10993 | gdb_assert (tu_group->symtabs == NULL); |
| 10994 | gdb_assert (m_builder == nullptr); |
| 10995 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
| 10996 | m_builder.reset (new struct buildsym_compunit |
| 10997 | (COMPUNIT_OBJFILE (cust), "", |
| 10998 | COMPUNIT_DIRNAME (cust), |
| 10999 | compunit_language (cust), |
| 11000 | 0, cust)); |
| 11001 | list_in_scope = get_builder ()->get_file_symbols (); |
| 11002 | } |
| 11003 | return; |
| 11004 | } |
| 11005 | |
| 11006 | line_header = lh.release (); |
| 11007 | line_header_die_owner = die; |
| 11008 | |
| 11009 | if (first_time) |
| 11010 | { |
| 11011 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
| 11012 | |
| 11013 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
| 11014 | still initializing it, and our caller (a few levels up) |
| 11015 | process_full_type_unit still needs to know if this is the first |
| 11016 | time. */ |
| 11017 | |
| 11018 | tu_group->symtabs |
| 11019 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, |
| 11020 | struct symtab *, line_header->file_names_size ()); |
| 11021 | |
| 11022 | auto &file_names = line_header->file_names (); |
| 11023 | for (i = 0; i < file_names.size (); ++i) |
| 11024 | { |
| 11025 | file_entry &fe = file_names[i]; |
| 11026 | dwarf2_start_subfile (this, fe.name, |
| 11027 | fe.include_dir (line_header)); |
| 11028 | buildsym_compunit *b = get_builder (); |
| 11029 | if (b->get_current_subfile ()->symtab == NULL) |
| 11030 | { |
| 11031 | /* NOTE: start_subfile will recognize when it's been |
| 11032 | passed a file it has already seen. So we can't |
| 11033 | assume there's a simple mapping from |
| 11034 | cu->line_header->file_names to subfiles, plus |
| 11035 | cu->line_header->file_names may contain dups. */ |
| 11036 | b->get_current_subfile ()->symtab |
| 11037 | = allocate_symtab (cust, b->get_current_subfile ()->name); |
| 11038 | } |
| 11039 | |
| 11040 | fe.symtab = b->get_current_subfile ()->symtab; |
| 11041 | tu_group->symtabs[i] = fe.symtab; |
| 11042 | } |
| 11043 | } |
| 11044 | else |
| 11045 | { |
| 11046 | gdb_assert (m_builder == nullptr); |
| 11047 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
| 11048 | m_builder.reset (new struct buildsym_compunit |
| 11049 | (COMPUNIT_OBJFILE (cust), "", |
| 11050 | COMPUNIT_DIRNAME (cust), |
| 11051 | compunit_language (cust), |
| 11052 | 0, cust)); |
| 11053 | list_in_scope = get_builder ()->get_file_symbols (); |
| 11054 | |
| 11055 | auto &file_names = line_header->file_names (); |
| 11056 | for (i = 0; i < file_names.size (); ++i) |
| 11057 | { |
| 11058 | file_entry &fe = file_names[i]; |
| 11059 | fe.symtab = tu_group->symtabs[i]; |
| 11060 | } |
| 11061 | } |
| 11062 | |
| 11063 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
| 11064 | so they don't have a "real" (so to speak) symtab anyway. |
| 11065 | There is later code that will assign the main symtab to all symbols |
| 11066 | that don't have one. We need to handle the case of a symbol with a |
| 11067 | missing symtab (DW_AT_decl_file) anyway. */ |
| 11068 | } |
| 11069 | |
| 11070 | /* Process DW_TAG_type_unit. |
| 11071 | For TUs we want to skip the first top level sibling if it's not the |
| 11072 | actual type being defined by this TU. In this case the first top |
| 11073 | level sibling is there to provide context only. */ |
| 11074 | |
| 11075 | static void |
| 11076 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 11077 | { |
| 11078 | struct die_info *child_die; |
| 11079 | |
| 11080 | prepare_one_comp_unit (cu, die, language_minimal); |
| 11081 | |
| 11082 | /* Initialize (or reinitialize) the machinery for building symtabs. |
| 11083 | We do this before processing child DIEs, so that the line header table |
| 11084 | is available for DW_AT_decl_file. */ |
| 11085 | cu->setup_type_unit_groups (die); |
| 11086 | |
| 11087 | if (die->child != NULL) |
| 11088 | { |
| 11089 | child_die = die->child; |
| 11090 | while (child_die && child_die->tag) |
| 11091 | { |
| 11092 | process_die (child_die, cu); |
| 11093 | child_die = child_die->sibling; |
| 11094 | } |
| 11095 | } |
| 11096 | } |
| 11097 | \f |
| 11098 | /* DWO/DWP files. |
| 11099 | |
| 11100 | http://gcc.gnu.org/wiki/DebugFission |
| 11101 | http://gcc.gnu.org/wiki/DebugFissionDWP |
| 11102 | |
| 11103 | To simplify handling of both DWO files ("object" files with the DWARF info) |
| 11104 | and DWP files (a file with the DWOs packaged up into one file), we treat |
| 11105 | DWP files as having a collection of virtual DWO files. */ |
| 11106 | |
| 11107 | static hashval_t |
| 11108 | hash_dwo_file (const void *item) |
| 11109 | { |
| 11110 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
| 11111 | hashval_t hash; |
| 11112 | |
| 11113 | hash = htab_hash_string (dwo_file->dwo_name); |
| 11114 | if (dwo_file->comp_dir != NULL) |
| 11115 | hash += htab_hash_string (dwo_file->comp_dir); |
| 11116 | return hash; |
| 11117 | } |
| 11118 | |
| 11119 | static int |
| 11120 | eq_dwo_file (const void *item_lhs, const void *item_rhs) |
| 11121 | { |
| 11122 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
| 11123 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; |
| 11124 | |
| 11125 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
| 11126 | return 0; |
| 11127 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) |
| 11128 | return lhs->comp_dir == rhs->comp_dir; |
| 11129 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; |
| 11130 | } |
| 11131 | |
| 11132 | /* Allocate a hash table for DWO files. */ |
| 11133 | |
| 11134 | static htab_up |
| 11135 | allocate_dwo_file_hash_table () |
| 11136 | { |
| 11137 | auto delete_dwo_file = [] (void *item) |
| 11138 | { |
| 11139 | struct dwo_file *dwo_file = (struct dwo_file *) item; |
| 11140 | |
| 11141 | delete dwo_file; |
| 11142 | }; |
| 11143 | |
| 11144 | return htab_up (htab_create_alloc (41, |
| 11145 | hash_dwo_file, |
| 11146 | eq_dwo_file, |
| 11147 | delete_dwo_file, |
| 11148 | xcalloc, xfree)); |
| 11149 | } |
| 11150 | |
| 11151 | /* Lookup DWO file DWO_NAME. */ |
| 11152 | |
| 11153 | static void ** |
| 11154 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11155 | const char *dwo_name, |
| 11156 | const char *comp_dir) |
| 11157 | { |
| 11158 | struct dwo_file find_entry; |
| 11159 | void **slot; |
| 11160 | |
| 11161 | if (dwarf2_per_objfile->dwo_files == NULL) |
| 11162 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); |
| 11163 | |
| 11164 | find_entry.dwo_name = dwo_name; |
| 11165 | find_entry.comp_dir = comp_dir; |
| 11166 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
| 11167 | INSERT); |
| 11168 | |
| 11169 | return slot; |
| 11170 | } |
| 11171 | |
| 11172 | static hashval_t |
| 11173 | hash_dwo_unit (const void *item) |
| 11174 | { |
| 11175 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
| 11176 | |
| 11177 | /* This drops the top 32 bits of the id, but is ok for a hash. */ |
| 11178 | return dwo_unit->signature; |
| 11179 | } |
| 11180 | |
| 11181 | static int |
| 11182 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) |
| 11183 | { |
| 11184 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
| 11185 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; |
| 11186 | |
| 11187 | /* The signature is assumed to be unique within the DWO file. |
| 11188 | So while object file CU dwo_id's always have the value zero, |
| 11189 | that's OK, assuming each object file DWO file has only one CU, |
| 11190 | and that's the rule for now. */ |
| 11191 | return lhs->signature == rhs->signature; |
| 11192 | } |
| 11193 | |
| 11194 | /* Allocate a hash table for DWO CUs,TUs. |
| 11195 | There is one of these tables for each of CUs,TUs for each DWO file. */ |
| 11196 | |
| 11197 | static htab_up |
| 11198 | allocate_dwo_unit_table () |
| 11199 | { |
| 11200 | /* Start out with a pretty small number. |
| 11201 | Generally DWO files contain only one CU and maybe some TUs. */ |
| 11202 | return htab_up (htab_create_alloc (3, |
| 11203 | hash_dwo_unit, |
| 11204 | eq_dwo_unit, |
| 11205 | NULL, xcalloc, xfree)); |
| 11206 | } |
| 11207 | |
| 11208 | /* die_reader_func for create_dwo_cu. */ |
| 11209 | |
| 11210 | static void |
| 11211 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
| 11212 | const gdb_byte *info_ptr, |
| 11213 | struct die_info *comp_unit_die, |
| 11214 | struct dwo_file *dwo_file, |
| 11215 | struct dwo_unit *dwo_unit) |
| 11216 | { |
| 11217 | struct dwarf2_cu *cu = reader->cu; |
| 11218 | sect_offset sect_off = cu->per_cu->sect_off; |
| 11219 | struct dwarf2_section_info *section = cu->per_cu->section; |
| 11220 | |
| 11221 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
| 11222 | if (!signature.has_value ()) |
| 11223 | { |
| 11224 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
| 11225 | " its dwo_id [in module %s]"), |
| 11226 | sect_offset_str (sect_off), dwo_file->dwo_name); |
| 11227 | return; |
| 11228 | } |
| 11229 | |
| 11230 | dwo_unit->dwo_file = dwo_file; |
| 11231 | dwo_unit->signature = *signature; |
| 11232 | dwo_unit->section = section; |
| 11233 | dwo_unit->sect_off = sect_off; |
| 11234 | dwo_unit->length = cu->per_cu->length; |
| 11235 | |
| 11236 | if (dwarf_read_debug) |
| 11237 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
| 11238 | sect_offset_str (sect_off), |
| 11239 | hex_string (dwo_unit->signature)); |
| 11240 | } |
| 11241 | |
| 11242 | /* Create the dwo_units for the CUs in a DWO_FILE. |
| 11243 | Note: This function processes DWO files only, not DWP files. */ |
| 11244 | |
| 11245 | static void |
| 11246 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11247 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
| 11248 | dwarf2_section_info §ion, htab_up &cus_htab) |
| 11249 | { |
| 11250 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11251 | const gdb_byte *info_ptr, *end_ptr; |
| 11252 | |
| 11253 | section.read (objfile); |
| 11254 | info_ptr = section.buffer; |
| 11255 | |
| 11256 | if (info_ptr == NULL) |
| 11257 | return; |
| 11258 | |
| 11259 | if (dwarf_read_debug) |
| 11260 | { |
| 11261 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
| 11262 | section.get_name (), |
| 11263 | section.get_file_name ()); |
| 11264 | } |
| 11265 | |
| 11266 | end_ptr = info_ptr + section.size; |
| 11267 | while (info_ptr < end_ptr) |
| 11268 | { |
| 11269 | struct dwarf2_per_cu_data per_cu; |
| 11270 | struct dwo_unit read_unit {}; |
| 11271 | struct dwo_unit *dwo_unit; |
| 11272 | void **slot; |
| 11273 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); |
| 11274 | |
| 11275 | memset (&per_cu, 0, sizeof (per_cu)); |
| 11276 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 11277 | per_cu.is_debug_types = 0; |
| 11278 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
| 11279 | per_cu.section = §ion; |
| 11280 | |
| 11281 | cutu_reader reader (&per_cu, cu, &dwo_file); |
| 11282 | if (!reader.dummy_p) |
| 11283 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, |
| 11284 | &dwo_file, &read_unit); |
| 11285 | info_ptr += per_cu.length; |
| 11286 | |
| 11287 | // If the unit could not be parsed, skip it. |
| 11288 | if (read_unit.dwo_file == NULL) |
| 11289 | continue; |
| 11290 | |
| 11291 | if (cus_htab == NULL) |
| 11292 | cus_htab = allocate_dwo_unit_table (); |
| 11293 | |
| 11294 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 11295 | *dwo_unit = read_unit; |
| 11296 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
| 11297 | gdb_assert (slot != NULL); |
| 11298 | if (*slot != NULL) |
| 11299 | { |
| 11300 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
| 11301 | sect_offset dup_sect_off = dup_cu->sect_off; |
| 11302 | |
| 11303 | complaint (_("debug cu entry at offset %s is duplicate to" |
| 11304 | " the entry at offset %s, signature %s"), |
| 11305 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), |
| 11306 | hex_string (dwo_unit->signature)); |
| 11307 | } |
| 11308 | *slot = (void *)dwo_unit; |
| 11309 | } |
| 11310 | } |
| 11311 | |
| 11312 | /* DWP file .debug_{cu,tu}_index section format: |
| 11313 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] |
| 11314 | |
| 11315 | DWP Version 1: |
| 11316 | |
| 11317 | Both index sections have the same format, and serve to map a 64-bit |
| 11318 | signature to a set of section numbers. Each section begins with a header, |
| 11319 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit |
| 11320 | indexes, and a pool of 32-bit section numbers. The index sections will be |
| 11321 | aligned at 8-byte boundaries in the file. |
| 11322 | |
| 11323 | The index section header consists of: |
| 11324 | |
| 11325 | V, 32 bit version number |
| 11326 | -, 32 bits unused |
| 11327 | N, 32 bit number of compilation units or type units in the index |
| 11328 | M, 32 bit number of slots in the hash table |
| 11329 | |
| 11330 | Numbers are recorded using the byte order of the application binary. |
| 11331 | |
| 11332 | The hash table begins at offset 16 in the section, and consists of an array |
| 11333 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte |
| 11334 | order of the application binary). Unused slots in the hash table are 0. |
| 11335 | (We rely on the extreme unlikeliness of a signature being exactly 0.) |
| 11336 | |
| 11337 | The parallel table begins immediately after the hash table |
| 11338 | (at offset 16 + 8 * M from the beginning of the section), and consists of an |
| 11339 | array of 32-bit indexes (using the byte order of the application binary), |
| 11340 | corresponding 1-1 with slots in the hash table. Each entry in the parallel |
| 11341 | table contains a 32-bit index into the pool of section numbers. For unused |
| 11342 | hash table slots, the corresponding entry in the parallel table will be 0. |
| 11343 | |
| 11344 | The pool of section numbers begins immediately following the hash table |
| 11345 | (at offset 16 + 12 * M from the beginning of the section). The pool of |
| 11346 | section numbers consists of an array of 32-bit words (using the byte order |
| 11347 | of the application binary). Each item in the array is indexed starting |
| 11348 | from 0. The hash table entry provides the index of the first section |
| 11349 | number in the set. Additional section numbers in the set follow, and the |
| 11350 | set is terminated by a 0 entry (section number 0 is not used in ELF). |
| 11351 | |
| 11352 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo |
| 11353 | section must be the first entry in the set, and the .debug_abbrev.dwo must |
| 11354 | be the second entry. Other members of the set may follow in any order. |
| 11355 | |
| 11356 | --- |
| 11357 | |
| 11358 | DWP Version 2: |
| 11359 | |
| 11360 | DWP Version 2 combines all the .debug_info, etc. sections into one, |
| 11361 | and the entries in the index tables are now offsets into these sections. |
| 11362 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info |
| 11363 | section. |
| 11364 | |
| 11365 | Index Section Contents: |
| 11366 | Header |
| 11367 | Hash Table of Signatures dwp_hash_table.hash_table |
| 11368 | Parallel Table of Indices dwp_hash_table.unit_table |
| 11369 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} |
| 11370 | Table of Section Sizes dwp_hash_table.v2.sizes |
| 11371 | |
| 11372 | The index section header consists of: |
| 11373 | |
| 11374 | V, 32 bit version number |
| 11375 | L, 32 bit number of columns in the table of section offsets |
| 11376 | N, 32 bit number of compilation units or type units in the index |
| 11377 | M, 32 bit number of slots in the hash table |
| 11378 | |
| 11379 | Numbers are recorded using the byte order of the application binary. |
| 11380 | |
| 11381 | The hash table has the same format as version 1. |
| 11382 | The parallel table of indices has the same format as version 1, |
| 11383 | except that the entries are origin-1 indices into the table of sections |
| 11384 | offsets and the table of section sizes. |
| 11385 | |
| 11386 | The table of offsets begins immediately following the parallel table |
| 11387 | (at offset 16 + 12 * M from the beginning of the section). The table is |
| 11388 | a two-dimensional array of 32-bit words (using the byte order of the |
| 11389 | application binary), with L columns and N+1 rows, in row-major order. |
| 11390 | Each row in the array is indexed starting from 0. The first row provides |
| 11391 | a key to the remaining rows: each column in this row provides an identifier |
| 11392 | for a debug section, and the offsets in the same column of subsequent rows |
| 11393 | refer to that section. The section identifiers are: |
| 11394 | |
| 11395 | DW_SECT_INFO 1 .debug_info.dwo |
| 11396 | DW_SECT_TYPES 2 .debug_types.dwo |
| 11397 | DW_SECT_ABBREV 3 .debug_abbrev.dwo |
| 11398 | DW_SECT_LINE 4 .debug_line.dwo |
| 11399 | DW_SECT_LOC 5 .debug_loc.dwo |
| 11400 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo |
| 11401 | DW_SECT_MACINFO 7 .debug_macinfo.dwo |
| 11402 | DW_SECT_MACRO 8 .debug_macro.dwo |
| 11403 | |
| 11404 | The offsets provided by the CU and TU index sections are the base offsets |
| 11405 | for the contributions made by each CU or TU to the corresponding section |
| 11406 | in the package file. Each CU and TU header contains an abbrev_offset |
| 11407 | field, used to find the abbreviations table for that CU or TU within the |
| 11408 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should |
| 11409 | be interpreted as relative to the base offset given in the index section. |
| 11410 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes |
| 11411 | should be interpreted as relative to the base offset for .debug_line.dwo, |
| 11412 | and offsets into other debug sections obtained from DWARF attributes should |
| 11413 | also be interpreted as relative to the corresponding base offset. |
| 11414 | |
| 11415 | The table of sizes begins immediately following the table of offsets. |
| 11416 | Like the table of offsets, it is a two-dimensional array of 32-bit words, |
| 11417 | with L columns and N rows, in row-major order. Each row in the array is |
| 11418 | indexed starting from 1 (row 0 is shared by the two tables). |
| 11419 | |
| 11420 | --- |
| 11421 | |
| 11422 | Hash table lookup is handled the same in version 1 and 2: |
| 11423 | |
| 11424 | We assume that N and M will not exceed 2^32 - 1. |
| 11425 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. |
| 11426 | |
| 11427 | Given a 64-bit compilation unit signature or a type signature S, an entry |
| 11428 | in the hash table is located as follows: |
| 11429 | |
| 11430 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
| 11431 | the low-order k bits all set to 1. |
| 11432 | |
| 11433 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
| 11434 | |
| 11435 | 3) If the hash table entry at index H matches the signature, use that |
| 11436 | entry. If the hash table entry at index H is unused (all zeroes), |
| 11437 | terminate the search: the signature is not present in the table. |
| 11438 | |
| 11439 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
| 11440 | |
| 11441 | Because M > N and H' and M are relatively prime, the search is guaranteed |
| 11442 | to stop at an unused slot or find the match. */ |
| 11443 | |
| 11444 | /* Create a hash table to map DWO IDs to their CU/TU entry in |
| 11445 | .debug_{info,types}.dwo in DWP_FILE. |
| 11446 | Returns NULL if there isn't one. |
| 11447 | Note: This function processes DWP files only, not DWO files. */ |
| 11448 | |
| 11449 | static struct dwp_hash_table * |
| 11450 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11451 | struct dwp_file *dwp_file, int is_debug_types) |
| 11452 | { |
| 11453 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11454 | bfd *dbfd = dwp_file->dbfd.get (); |
| 11455 | const gdb_byte *index_ptr, *index_end; |
| 11456 | struct dwarf2_section_info *index; |
| 11457 | uint32_t version, nr_columns, nr_units, nr_slots; |
| 11458 | struct dwp_hash_table *htab; |
| 11459 | |
| 11460 | if (is_debug_types) |
| 11461 | index = &dwp_file->sections.tu_index; |
| 11462 | else |
| 11463 | index = &dwp_file->sections.cu_index; |
| 11464 | |
| 11465 | if (index->empty ()) |
| 11466 | return NULL; |
| 11467 | index->read (objfile); |
| 11468 | |
| 11469 | index_ptr = index->buffer; |
| 11470 | index_end = index_ptr + index->size; |
| 11471 | |
| 11472 | version = read_4_bytes (dbfd, index_ptr); |
| 11473 | index_ptr += 4; |
| 11474 | if (version == 2) |
| 11475 | nr_columns = read_4_bytes (dbfd, index_ptr); |
| 11476 | else |
| 11477 | nr_columns = 0; |
| 11478 | index_ptr += 4; |
| 11479 | nr_units = read_4_bytes (dbfd, index_ptr); |
| 11480 | index_ptr += 4; |
| 11481 | nr_slots = read_4_bytes (dbfd, index_ptr); |
| 11482 | index_ptr += 4; |
| 11483 | |
| 11484 | if (version != 1 && version != 2) |
| 11485 | { |
| 11486 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
| 11487 | " [in module %s]"), |
| 11488 | pulongest (version), dwp_file->name); |
| 11489 | } |
| 11490 | if (nr_slots != (nr_slots & -nr_slots)) |
| 11491 | { |
| 11492 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
| 11493 | " is not power of 2 [in module %s]"), |
| 11494 | pulongest (nr_slots), dwp_file->name); |
| 11495 | } |
| 11496 | |
| 11497 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); |
| 11498 | htab->version = version; |
| 11499 | htab->nr_columns = nr_columns; |
| 11500 | htab->nr_units = nr_units; |
| 11501 | htab->nr_slots = nr_slots; |
| 11502 | htab->hash_table = index_ptr; |
| 11503 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; |
| 11504 | |
| 11505 | /* Exit early if the table is empty. */ |
| 11506 | if (nr_slots == 0 || nr_units == 0 |
| 11507 | || (version == 2 && nr_columns == 0)) |
| 11508 | { |
| 11509 | /* All must be zero. */ |
| 11510 | if (nr_slots != 0 || nr_units != 0 |
| 11511 | || (version == 2 && nr_columns != 0)) |
| 11512 | { |
| 11513 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
| 11514 | " all zero [in modules %s]"), |
| 11515 | dwp_file->name); |
| 11516 | } |
| 11517 | return htab; |
| 11518 | } |
| 11519 | |
| 11520 | if (version == 1) |
| 11521 | { |
| 11522 | htab->section_pool.v1.indices = |
| 11523 | htab->unit_table + sizeof (uint32_t) * nr_slots; |
| 11524 | /* It's harder to decide whether the section is too small in v1. |
| 11525 | V1 is deprecated anyway so we punt. */ |
| 11526 | } |
| 11527 | else |
| 11528 | { |
| 11529 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; |
| 11530 | int *ids = htab->section_pool.v2.section_ids; |
| 11531 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
| 11532 | /* Reverse map for error checking. */ |
| 11533 | int ids_seen[DW_SECT_MAX + 1]; |
| 11534 | int i; |
| 11535 | |
| 11536 | if (nr_columns < 2) |
| 11537 | { |
| 11538 | error (_("Dwarf Error: bad DWP hash table, too few columns" |
| 11539 | " in section table [in module %s]"), |
| 11540 | dwp_file->name); |
| 11541 | } |
| 11542 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) |
| 11543 | { |
| 11544 | error (_("Dwarf Error: bad DWP hash table, too many columns" |
| 11545 | " in section table [in module %s]"), |
| 11546 | dwp_file->name); |
| 11547 | } |
| 11548 | memset (ids, 255, sizeof_ids); |
| 11549 | memset (ids_seen, 255, sizeof (ids_seen)); |
| 11550 | for (i = 0; i < nr_columns; ++i) |
| 11551 | { |
| 11552 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); |
| 11553 | |
| 11554 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) |
| 11555 | { |
| 11556 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" |
| 11557 | " in section table [in module %s]"), |
| 11558 | id, dwp_file->name); |
| 11559 | } |
| 11560 | if (ids_seen[id] != -1) |
| 11561 | { |
| 11562 | error (_("Dwarf Error: bad DWP hash table, duplicate section" |
| 11563 | " id %d in section table [in module %s]"), |
| 11564 | id, dwp_file->name); |
| 11565 | } |
| 11566 | ids_seen[id] = i; |
| 11567 | ids[i] = id; |
| 11568 | } |
| 11569 | /* Must have exactly one info or types section. */ |
| 11570 | if (((ids_seen[DW_SECT_INFO] != -1) |
| 11571 | + (ids_seen[DW_SECT_TYPES] != -1)) |
| 11572 | != 1) |
| 11573 | { |
| 11574 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" |
| 11575 | " DWO info/types section [in module %s]"), |
| 11576 | dwp_file->name); |
| 11577 | } |
| 11578 | /* Must have an abbrev section. */ |
| 11579 | if (ids_seen[DW_SECT_ABBREV] == -1) |
| 11580 | { |
| 11581 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" |
| 11582 | " section [in module %s]"), |
| 11583 | dwp_file->name); |
| 11584 | } |
| 11585 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; |
| 11586 | htab->section_pool.v2.sizes = |
| 11587 | htab->section_pool.v2.offsets + (sizeof (uint32_t) |
| 11588 | * nr_units * nr_columns); |
| 11589 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) |
| 11590 | * nr_units * nr_columns)) |
| 11591 | > index_end) |
| 11592 | { |
| 11593 | error (_("Dwarf Error: DWP index section is corrupt (too small)" |
| 11594 | " [in module %s]"), |
| 11595 | dwp_file->name); |
| 11596 | } |
| 11597 | } |
| 11598 | |
| 11599 | return htab; |
| 11600 | } |
| 11601 | |
| 11602 | /* Update SECTIONS with the data from SECTP. |
| 11603 | |
| 11604 | This function is like the other "locate" section routines that are |
| 11605 | passed to bfd_map_over_sections, but in this context the sections to |
| 11606 | read comes from the DWP V1 hash table, not the full ELF section table. |
| 11607 | |
| 11608 | The result is non-zero for success, or zero if an error was found. */ |
| 11609 | |
| 11610 | static int |
| 11611 | locate_v1_virtual_dwo_sections (asection *sectp, |
| 11612 | struct virtual_v1_dwo_sections *sections) |
| 11613 | { |
| 11614 | const struct dwop_section_names *names = &dwop_section_names; |
| 11615 | |
| 11616 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 11617 | { |
| 11618 | /* There can be only one. */ |
| 11619 | if (sections->abbrev.s.section != NULL) |
| 11620 | return 0; |
| 11621 | sections->abbrev.s.section = sectp; |
| 11622 | sections->abbrev.size = bfd_section_size (sectp); |
| 11623 | } |
| 11624 | else if (section_is_p (sectp->name, &names->info_dwo) |
| 11625 | || section_is_p (sectp->name, &names->types_dwo)) |
| 11626 | { |
| 11627 | /* There can be only one. */ |
| 11628 | if (sections->info_or_types.s.section != NULL) |
| 11629 | return 0; |
| 11630 | sections->info_or_types.s.section = sectp; |
| 11631 | sections->info_or_types.size = bfd_section_size (sectp); |
| 11632 | } |
| 11633 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 11634 | { |
| 11635 | /* There can be only one. */ |
| 11636 | if (sections->line.s.section != NULL) |
| 11637 | return 0; |
| 11638 | sections->line.s.section = sectp; |
| 11639 | sections->line.size = bfd_section_size (sectp); |
| 11640 | } |
| 11641 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 11642 | { |
| 11643 | /* There can be only one. */ |
| 11644 | if (sections->loc.s.section != NULL) |
| 11645 | return 0; |
| 11646 | sections->loc.s.section = sectp; |
| 11647 | sections->loc.size = bfd_section_size (sectp); |
| 11648 | } |
| 11649 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 11650 | { |
| 11651 | /* There can be only one. */ |
| 11652 | if (sections->macinfo.s.section != NULL) |
| 11653 | return 0; |
| 11654 | sections->macinfo.s.section = sectp; |
| 11655 | sections->macinfo.size = bfd_section_size (sectp); |
| 11656 | } |
| 11657 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 11658 | { |
| 11659 | /* There can be only one. */ |
| 11660 | if (sections->macro.s.section != NULL) |
| 11661 | return 0; |
| 11662 | sections->macro.s.section = sectp; |
| 11663 | sections->macro.size = bfd_section_size (sectp); |
| 11664 | } |
| 11665 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 11666 | { |
| 11667 | /* There can be only one. */ |
| 11668 | if (sections->str_offsets.s.section != NULL) |
| 11669 | return 0; |
| 11670 | sections->str_offsets.s.section = sectp; |
| 11671 | sections->str_offsets.size = bfd_section_size (sectp); |
| 11672 | } |
| 11673 | else |
| 11674 | { |
| 11675 | /* No other kind of section is valid. */ |
| 11676 | return 0; |
| 11677 | } |
| 11678 | |
| 11679 | return 1; |
| 11680 | } |
| 11681 | |
| 11682 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
| 11683 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. |
| 11684 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. |
| 11685 | This is for DWP version 1 files. */ |
| 11686 | |
| 11687 | static struct dwo_unit * |
| 11688 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11689 | struct dwp_file *dwp_file, |
| 11690 | uint32_t unit_index, |
| 11691 | const char *comp_dir, |
| 11692 | ULONGEST signature, int is_debug_types) |
| 11693 | { |
| 11694 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11695 | const struct dwp_hash_table *dwp_htab = |
| 11696 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 11697 | bfd *dbfd = dwp_file->dbfd.get (); |
| 11698 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 11699 | struct dwo_file *dwo_file; |
| 11700 | struct dwo_unit *dwo_unit; |
| 11701 | struct virtual_v1_dwo_sections sections; |
| 11702 | void **dwo_file_slot; |
| 11703 | int i; |
| 11704 | |
| 11705 | gdb_assert (dwp_file->version == 1); |
| 11706 | |
| 11707 | if (dwarf_read_debug) |
| 11708 | { |
| 11709 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
| 11710 | kind, |
| 11711 | pulongest (unit_index), hex_string (signature), |
| 11712 | dwp_file->name); |
| 11713 | } |
| 11714 | |
| 11715 | /* Fetch the sections of this DWO unit. |
| 11716 | Put a limit on the number of sections we look for so that bad data |
| 11717 | doesn't cause us to loop forever. */ |
| 11718 | |
| 11719 | #define MAX_NR_V1_DWO_SECTIONS \ |
| 11720 | (1 /* .debug_info or .debug_types */ \ |
| 11721 | + 1 /* .debug_abbrev */ \ |
| 11722 | + 1 /* .debug_line */ \ |
| 11723 | + 1 /* .debug_loc */ \ |
| 11724 | + 1 /* .debug_str_offsets */ \ |
| 11725 | + 1 /* .debug_macro or .debug_macinfo */ \ |
| 11726 | + 1 /* trailing zero */) |
| 11727 | |
| 11728 | memset (§ions, 0, sizeof (sections)); |
| 11729 | |
| 11730 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
| 11731 | { |
| 11732 | asection *sectp; |
| 11733 | uint32_t section_nr = |
| 11734 | read_4_bytes (dbfd, |
| 11735 | dwp_htab->section_pool.v1.indices |
| 11736 | + (unit_index + i) * sizeof (uint32_t)); |
| 11737 | |
| 11738 | if (section_nr == 0) |
| 11739 | break; |
| 11740 | if (section_nr >= dwp_file->num_sections) |
| 11741 | { |
| 11742 | error (_("Dwarf Error: bad DWP hash table, section number too large" |
| 11743 | " [in module %s]"), |
| 11744 | dwp_file->name); |
| 11745 | } |
| 11746 | |
| 11747 | sectp = dwp_file->elf_sections[section_nr]; |
| 11748 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
| 11749 | { |
| 11750 | error (_("Dwarf Error: bad DWP hash table, invalid section found" |
| 11751 | " [in module %s]"), |
| 11752 | dwp_file->name); |
| 11753 | } |
| 11754 | } |
| 11755 | |
| 11756 | if (i < 2 |
| 11757 | || sections.info_or_types.empty () |
| 11758 | || sections.abbrev.empty ()) |
| 11759 | { |
| 11760 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" |
| 11761 | " [in module %s]"), |
| 11762 | dwp_file->name); |
| 11763 | } |
| 11764 | if (i == MAX_NR_V1_DWO_SECTIONS) |
| 11765 | { |
| 11766 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" |
| 11767 | " [in module %s]"), |
| 11768 | dwp_file->name); |
| 11769 | } |
| 11770 | |
| 11771 | /* It's easier for the rest of the code if we fake a struct dwo_file and |
| 11772 | have dwo_unit "live" in that. At least for now. |
| 11773 | |
| 11774 | The DWP file can be made up of a random collection of CUs and TUs. |
| 11775 | However, for each CU + set of TUs that came from the same original DWO |
| 11776 | file, we can combine them back into a virtual DWO file to save space |
| 11777 | (fewer struct dwo_file objects to allocate). Remember that for really |
| 11778 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
| 11779 | |
| 11780 | std::string virtual_dwo_name = |
| 11781 | string_printf ("virtual-dwo/%d-%d-%d-%d", |
| 11782 | sections.abbrev.get_id (), |
| 11783 | sections.line.get_id (), |
| 11784 | sections.loc.get_id (), |
| 11785 | sections.str_offsets.get_id ()); |
| 11786 | /* Can we use an existing virtual DWO file? */ |
| 11787 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 11788 | virtual_dwo_name.c_str (), |
| 11789 | comp_dir); |
| 11790 | /* Create one if necessary. */ |
| 11791 | if (*dwo_file_slot == NULL) |
| 11792 | { |
| 11793 | if (dwarf_read_debug) |
| 11794 | { |
| 11795 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", |
| 11796 | virtual_dwo_name.c_str ()); |
| 11797 | } |
| 11798 | dwo_file = new struct dwo_file; |
| 11799 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
| 11800 | dwo_file->comp_dir = comp_dir; |
| 11801 | dwo_file->sections.abbrev = sections.abbrev; |
| 11802 | dwo_file->sections.line = sections.line; |
| 11803 | dwo_file->sections.loc = sections.loc; |
| 11804 | dwo_file->sections.macinfo = sections.macinfo; |
| 11805 | dwo_file->sections.macro = sections.macro; |
| 11806 | dwo_file->sections.str_offsets = sections.str_offsets; |
| 11807 | /* The "str" section is global to the entire DWP file. */ |
| 11808 | dwo_file->sections.str = dwp_file->sections.str; |
| 11809 | /* The info or types section is assigned below to dwo_unit, |
| 11810 | there's no need to record it in dwo_file. |
| 11811 | Also, we can't simply record type sections in dwo_file because |
| 11812 | we record a pointer into the vector in dwo_unit. As we collect more |
| 11813 | types we'll grow the vector and eventually have to reallocate space |
| 11814 | for it, invalidating all copies of pointers into the previous |
| 11815 | contents. */ |
| 11816 | *dwo_file_slot = dwo_file; |
| 11817 | } |
| 11818 | else |
| 11819 | { |
| 11820 | if (dwarf_read_debug) |
| 11821 | { |
| 11822 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", |
| 11823 | virtual_dwo_name.c_str ()); |
| 11824 | } |
| 11825 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 11826 | } |
| 11827 | |
| 11828 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 11829 | dwo_unit->dwo_file = dwo_file; |
| 11830 | dwo_unit->signature = signature; |
| 11831 | dwo_unit->section = |
| 11832 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); |
| 11833 | *dwo_unit->section = sections.info_or_types; |
| 11834 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
| 11835 | |
| 11836 | return dwo_unit; |
| 11837 | } |
| 11838 | |
| 11839 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
| 11840 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the |
| 11841 | piece within that section used by a TU/CU, return a virtual section |
| 11842 | of just that piece. */ |
| 11843 | |
| 11844 | static struct dwarf2_section_info |
| 11845 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11846 | struct dwarf2_section_info *section, |
| 11847 | bfd_size_type offset, bfd_size_type size) |
| 11848 | { |
| 11849 | struct dwarf2_section_info result; |
| 11850 | asection *sectp; |
| 11851 | |
| 11852 | gdb_assert (section != NULL); |
| 11853 | gdb_assert (!section->is_virtual); |
| 11854 | |
| 11855 | memset (&result, 0, sizeof (result)); |
| 11856 | result.s.containing_section = section; |
| 11857 | result.is_virtual = true; |
| 11858 | |
| 11859 | if (size == 0) |
| 11860 | return result; |
| 11861 | |
| 11862 | sectp = section->get_bfd_section (); |
| 11863 | |
| 11864 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the |
| 11865 | bounds of the real section. This is a pretty-rare event, so just |
| 11866 | flag an error (easier) instead of a warning and trying to cope. */ |
| 11867 | if (sectp == NULL |
| 11868 | || offset + size > bfd_section_size (sectp)) |
| 11869 | { |
| 11870 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
| 11871 | " in section %s [in module %s]"), |
| 11872 | sectp ? bfd_section_name (sectp) : "<unknown>", |
| 11873 | objfile_name (dwarf2_per_objfile->objfile)); |
| 11874 | } |
| 11875 | |
| 11876 | result.virtual_offset = offset; |
| 11877 | result.size = size; |
| 11878 | return result; |
| 11879 | } |
| 11880 | |
| 11881 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
| 11882 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. |
| 11883 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. |
| 11884 | This is for DWP version 2 files. */ |
| 11885 | |
| 11886 | static struct dwo_unit * |
| 11887 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11888 | struct dwp_file *dwp_file, |
| 11889 | uint32_t unit_index, |
| 11890 | const char *comp_dir, |
| 11891 | ULONGEST signature, int is_debug_types) |
| 11892 | { |
| 11893 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11894 | const struct dwp_hash_table *dwp_htab = |
| 11895 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 11896 | bfd *dbfd = dwp_file->dbfd.get (); |
| 11897 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 11898 | struct dwo_file *dwo_file; |
| 11899 | struct dwo_unit *dwo_unit; |
| 11900 | struct virtual_v2_dwo_sections sections; |
| 11901 | void **dwo_file_slot; |
| 11902 | int i; |
| 11903 | |
| 11904 | gdb_assert (dwp_file->version == 2); |
| 11905 | |
| 11906 | if (dwarf_read_debug) |
| 11907 | { |
| 11908 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", |
| 11909 | kind, |
| 11910 | pulongest (unit_index), hex_string (signature), |
| 11911 | dwp_file->name); |
| 11912 | } |
| 11913 | |
| 11914 | /* Fetch the section offsets of this DWO unit. */ |
| 11915 | |
| 11916 | memset (§ions, 0, sizeof (sections)); |
| 11917 | |
| 11918 | for (i = 0; i < dwp_htab->nr_columns; ++i) |
| 11919 | { |
| 11920 | uint32_t offset = read_4_bytes (dbfd, |
| 11921 | dwp_htab->section_pool.v2.offsets |
| 11922 | + (((unit_index - 1) * dwp_htab->nr_columns |
| 11923 | + i) |
| 11924 | * sizeof (uint32_t))); |
| 11925 | uint32_t size = read_4_bytes (dbfd, |
| 11926 | dwp_htab->section_pool.v2.sizes |
| 11927 | + (((unit_index - 1) * dwp_htab->nr_columns |
| 11928 | + i) |
| 11929 | * sizeof (uint32_t))); |
| 11930 | |
| 11931 | switch (dwp_htab->section_pool.v2.section_ids[i]) |
| 11932 | { |
| 11933 | case DW_SECT_INFO: |
| 11934 | case DW_SECT_TYPES: |
| 11935 | sections.info_or_types_offset = offset; |
| 11936 | sections.info_or_types_size = size; |
| 11937 | break; |
| 11938 | case DW_SECT_ABBREV: |
| 11939 | sections.abbrev_offset = offset; |
| 11940 | sections.abbrev_size = size; |
| 11941 | break; |
| 11942 | case DW_SECT_LINE: |
| 11943 | sections.line_offset = offset; |
| 11944 | sections.line_size = size; |
| 11945 | break; |
| 11946 | case DW_SECT_LOC: |
| 11947 | sections.loc_offset = offset; |
| 11948 | sections.loc_size = size; |
| 11949 | break; |
| 11950 | case DW_SECT_STR_OFFSETS: |
| 11951 | sections.str_offsets_offset = offset; |
| 11952 | sections.str_offsets_size = size; |
| 11953 | break; |
| 11954 | case DW_SECT_MACINFO: |
| 11955 | sections.macinfo_offset = offset; |
| 11956 | sections.macinfo_size = size; |
| 11957 | break; |
| 11958 | case DW_SECT_MACRO: |
| 11959 | sections.macro_offset = offset; |
| 11960 | sections.macro_size = size; |
| 11961 | break; |
| 11962 | } |
| 11963 | } |
| 11964 | |
| 11965 | /* It's easier for the rest of the code if we fake a struct dwo_file and |
| 11966 | have dwo_unit "live" in that. At least for now. |
| 11967 | |
| 11968 | The DWP file can be made up of a random collection of CUs and TUs. |
| 11969 | However, for each CU + set of TUs that came from the same original DWO |
| 11970 | file, we can combine them back into a virtual DWO file to save space |
| 11971 | (fewer struct dwo_file objects to allocate). Remember that for really |
| 11972 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
| 11973 | |
| 11974 | std::string virtual_dwo_name = |
| 11975 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", |
| 11976 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), |
| 11977 | (long) (sections.line_size ? sections.line_offset : 0), |
| 11978 | (long) (sections.loc_size ? sections.loc_offset : 0), |
| 11979 | (long) (sections.str_offsets_size |
| 11980 | ? sections.str_offsets_offset : 0)); |
| 11981 | /* Can we use an existing virtual DWO file? */ |
| 11982 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 11983 | virtual_dwo_name.c_str (), |
| 11984 | comp_dir); |
| 11985 | /* Create one if necessary. */ |
| 11986 | if (*dwo_file_slot == NULL) |
| 11987 | { |
| 11988 | if (dwarf_read_debug) |
| 11989 | { |
| 11990 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", |
| 11991 | virtual_dwo_name.c_str ()); |
| 11992 | } |
| 11993 | dwo_file = new struct dwo_file; |
| 11994 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
| 11995 | dwo_file->comp_dir = comp_dir; |
| 11996 | dwo_file->sections.abbrev = |
| 11997 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
| 11998 | sections.abbrev_offset, sections.abbrev_size); |
| 11999 | dwo_file->sections.line = |
| 12000 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
| 12001 | sections.line_offset, sections.line_size); |
| 12002 | dwo_file->sections.loc = |
| 12003 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
| 12004 | sections.loc_offset, sections.loc_size); |
| 12005 | dwo_file->sections.macinfo = |
| 12006 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
| 12007 | sections.macinfo_offset, sections.macinfo_size); |
| 12008 | dwo_file->sections.macro = |
| 12009 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
| 12010 | sections.macro_offset, sections.macro_size); |
| 12011 | dwo_file->sections.str_offsets = |
| 12012 | create_dwp_v2_section (dwarf2_per_objfile, |
| 12013 | &dwp_file->sections.str_offsets, |
| 12014 | sections.str_offsets_offset, |
| 12015 | sections.str_offsets_size); |
| 12016 | /* The "str" section is global to the entire DWP file. */ |
| 12017 | dwo_file->sections.str = dwp_file->sections.str; |
| 12018 | /* The info or types section is assigned below to dwo_unit, |
| 12019 | there's no need to record it in dwo_file. |
| 12020 | Also, we can't simply record type sections in dwo_file because |
| 12021 | we record a pointer into the vector in dwo_unit. As we collect more |
| 12022 | types we'll grow the vector and eventually have to reallocate space |
| 12023 | for it, invalidating all copies of pointers into the previous |
| 12024 | contents. */ |
| 12025 | *dwo_file_slot = dwo_file; |
| 12026 | } |
| 12027 | else |
| 12028 | { |
| 12029 | if (dwarf_read_debug) |
| 12030 | { |
| 12031 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", |
| 12032 | virtual_dwo_name.c_str ()); |
| 12033 | } |
| 12034 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 12035 | } |
| 12036 | |
| 12037 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 12038 | dwo_unit->dwo_file = dwo_file; |
| 12039 | dwo_unit->signature = signature; |
| 12040 | dwo_unit->section = |
| 12041 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); |
| 12042 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
| 12043 | is_debug_types |
| 12044 | ? &dwp_file->sections.types |
| 12045 | : &dwp_file->sections.info, |
| 12046 | sections.info_or_types_offset, |
| 12047 | sections.info_or_types_size); |
| 12048 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
| 12049 | |
| 12050 | return dwo_unit; |
| 12051 | } |
| 12052 | |
| 12053 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
| 12054 | Returns NULL if the signature isn't found. */ |
| 12055 | |
| 12056 | static struct dwo_unit * |
| 12057 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12058 | struct dwp_file *dwp_file, const char *comp_dir, |
| 12059 | ULONGEST signature, int is_debug_types) |
| 12060 | { |
| 12061 | const struct dwp_hash_table *dwp_htab = |
| 12062 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 12063 | bfd *dbfd = dwp_file->dbfd.get (); |
| 12064 | uint32_t mask = dwp_htab->nr_slots - 1; |
| 12065 | uint32_t hash = signature & mask; |
| 12066 | uint32_t hash2 = ((signature >> 32) & mask) | 1; |
| 12067 | unsigned int i; |
| 12068 | void **slot; |
| 12069 | struct dwo_unit find_dwo_cu; |
| 12070 | |
| 12071 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); |
| 12072 | find_dwo_cu.signature = signature; |
| 12073 | slot = htab_find_slot (is_debug_types |
| 12074 | ? dwp_file->loaded_tus.get () |
| 12075 | : dwp_file->loaded_cus.get (), |
| 12076 | &find_dwo_cu, INSERT); |
| 12077 | |
| 12078 | if (*slot != NULL) |
| 12079 | return (struct dwo_unit *) *slot; |
| 12080 | |
| 12081 | /* Use a for loop so that we don't loop forever on bad debug info. */ |
| 12082 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
| 12083 | { |
| 12084 | ULONGEST signature_in_table; |
| 12085 | |
| 12086 | signature_in_table = |
| 12087 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
| 12088 | if (signature_in_table == signature) |
| 12089 | { |
| 12090 | uint32_t unit_index = |
| 12091 | read_4_bytes (dbfd, |
| 12092 | dwp_htab->unit_table + hash * sizeof (uint32_t)); |
| 12093 | |
| 12094 | if (dwp_file->version == 1) |
| 12095 | { |
| 12096 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
| 12097 | dwp_file, unit_index, |
| 12098 | comp_dir, signature, |
| 12099 | is_debug_types); |
| 12100 | } |
| 12101 | else |
| 12102 | { |
| 12103 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
| 12104 | dwp_file, unit_index, |
| 12105 | comp_dir, signature, |
| 12106 | is_debug_types); |
| 12107 | } |
| 12108 | return (struct dwo_unit *) *slot; |
| 12109 | } |
| 12110 | if (signature_in_table == 0) |
| 12111 | return NULL; |
| 12112 | hash = (hash + hash2) & mask; |
| 12113 | } |
| 12114 | |
| 12115 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" |
| 12116 | " [in module %s]"), |
| 12117 | dwp_file->name); |
| 12118 | } |
| 12119 | |
| 12120 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
| 12121 | Open the file specified by FILE_NAME and hand it off to BFD for |
| 12122 | preliminary analysis. Return a newly initialized bfd *, which |
| 12123 | includes a canonicalized copy of FILE_NAME. |
| 12124 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
| 12125 | SEARCH_CWD is true if the current directory is to be searched. |
| 12126 | It will be searched before debug-file-directory. |
| 12127 | If successful, the file is added to the bfd include table of the |
| 12128 | objfile's bfd (see gdb_bfd_record_inclusion). |
| 12129 | If unable to find/open the file, return NULL. |
| 12130 | NOTE: This function is derived from symfile_bfd_open. */ |
| 12131 | |
| 12132 | static gdb_bfd_ref_ptr |
| 12133 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12134 | const char *file_name, int is_dwp, int search_cwd) |
| 12135 | { |
| 12136 | int desc; |
| 12137 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
| 12138 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." |
| 12139 | to debug_file_directory. */ |
| 12140 | const char *search_path; |
| 12141 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
| 12142 | |
| 12143 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
| 12144 | if (search_cwd) |
| 12145 | { |
| 12146 | if (*debug_file_directory != '\0') |
| 12147 | { |
| 12148 | search_path_holder.reset (concat (".", dirname_separator_string, |
| 12149 | debug_file_directory, |
| 12150 | (char *) NULL)); |
| 12151 | search_path = search_path_holder.get (); |
| 12152 | } |
| 12153 | else |
| 12154 | search_path = "."; |
| 12155 | } |
| 12156 | else |
| 12157 | search_path = debug_file_directory; |
| 12158 | |
| 12159 | openp_flags flags = OPF_RETURN_REALPATH; |
| 12160 | if (is_dwp) |
| 12161 | flags |= OPF_SEARCH_IN_PATH; |
| 12162 | |
| 12163 | gdb::unique_xmalloc_ptr<char> absolute_name; |
| 12164 | desc = openp (search_path, flags, file_name, |
| 12165 | O_RDONLY | O_BINARY, &absolute_name); |
| 12166 | if (desc < 0) |
| 12167 | return NULL; |
| 12168 | |
| 12169 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
| 12170 | gnutarget, desc)); |
| 12171 | if (sym_bfd == NULL) |
| 12172 | return NULL; |
| 12173 | bfd_set_cacheable (sym_bfd.get (), 1); |
| 12174 | |
| 12175 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
| 12176 | return NULL; |
| 12177 | |
| 12178 | /* Success. Record the bfd as having been included by the objfile's bfd. |
| 12179 | This is important because things like demangled_names_hash lives in the |
| 12180 | objfile's per_bfd space and may have references to things like symbol |
| 12181 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ |
| 12182 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
| 12183 | |
| 12184 | return sym_bfd; |
| 12185 | } |
| 12186 | |
| 12187 | /* Try to open DWO file FILE_NAME. |
| 12188 | COMP_DIR is the DW_AT_comp_dir attribute. |
| 12189 | The result is the bfd handle of the file. |
| 12190 | If there is a problem finding or opening the file, return NULL. |
| 12191 | Upon success, the canonicalized path of the file is stored in the bfd, |
| 12192 | same as symfile_bfd_open. */ |
| 12193 | |
| 12194 | static gdb_bfd_ref_ptr |
| 12195 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12196 | const char *file_name, const char *comp_dir) |
| 12197 | { |
| 12198 | if (IS_ABSOLUTE_PATH (file_name)) |
| 12199 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 12200 | 0 /*is_dwp*/, 0 /*search_cwd*/); |
| 12201 | |
| 12202 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ |
| 12203 | |
| 12204 | if (comp_dir != NULL) |
| 12205 | { |
| 12206 | gdb::unique_xmalloc_ptr<char> path_to_try |
| 12207 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); |
| 12208 | |
| 12209 | /* NOTE: If comp_dir is a relative path, this will also try the |
| 12210 | search path, which seems useful. */ |
| 12211 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
| 12212 | path_to_try.get (), |
| 12213 | 0 /*is_dwp*/, |
| 12214 | 1 /*search_cwd*/)); |
| 12215 | if (abfd != NULL) |
| 12216 | return abfd; |
| 12217 | } |
| 12218 | |
| 12219 | /* That didn't work, try debug-file-directory, which, despite its name, |
| 12220 | is a list of paths. */ |
| 12221 | |
| 12222 | if (*debug_file_directory == '\0') |
| 12223 | return NULL; |
| 12224 | |
| 12225 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 12226 | 0 /*is_dwp*/, 1 /*search_cwd*/); |
| 12227 | } |
| 12228 | |
| 12229 | /* This function is mapped across the sections and remembers the offset and |
| 12230 | size of each of the DWO debugging sections we are interested in. */ |
| 12231 | |
| 12232 | static void |
| 12233 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) |
| 12234 | { |
| 12235 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
| 12236 | const struct dwop_section_names *names = &dwop_section_names; |
| 12237 | |
| 12238 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 12239 | { |
| 12240 | dwo_sections->abbrev.s.section = sectp; |
| 12241 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
| 12242 | } |
| 12243 | else if (section_is_p (sectp->name, &names->info_dwo)) |
| 12244 | { |
| 12245 | dwo_sections->info.s.section = sectp; |
| 12246 | dwo_sections->info.size = bfd_section_size (sectp); |
| 12247 | } |
| 12248 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 12249 | { |
| 12250 | dwo_sections->line.s.section = sectp; |
| 12251 | dwo_sections->line.size = bfd_section_size (sectp); |
| 12252 | } |
| 12253 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 12254 | { |
| 12255 | dwo_sections->loc.s.section = sectp; |
| 12256 | dwo_sections->loc.size = bfd_section_size (sectp); |
| 12257 | } |
| 12258 | else if (section_is_p (sectp->name, &names->loclists_dwo)) |
| 12259 | { |
| 12260 | dwo_sections->loclists.s.section = sectp; |
| 12261 | dwo_sections->loclists.size = bfd_section_size (sectp); |
| 12262 | } |
| 12263 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 12264 | { |
| 12265 | dwo_sections->macinfo.s.section = sectp; |
| 12266 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
| 12267 | } |
| 12268 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 12269 | { |
| 12270 | dwo_sections->macro.s.section = sectp; |
| 12271 | dwo_sections->macro.size = bfd_section_size (sectp); |
| 12272 | } |
| 12273 | else if (section_is_p (sectp->name, &names->str_dwo)) |
| 12274 | { |
| 12275 | dwo_sections->str.s.section = sectp; |
| 12276 | dwo_sections->str.size = bfd_section_size (sectp); |
| 12277 | } |
| 12278 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 12279 | { |
| 12280 | dwo_sections->str_offsets.s.section = sectp; |
| 12281 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
| 12282 | } |
| 12283 | else if (section_is_p (sectp->name, &names->types_dwo)) |
| 12284 | { |
| 12285 | struct dwarf2_section_info type_section; |
| 12286 | |
| 12287 | memset (&type_section, 0, sizeof (type_section)); |
| 12288 | type_section.s.section = sectp; |
| 12289 | type_section.size = bfd_section_size (sectp); |
| 12290 | dwo_sections->types.push_back (type_section); |
| 12291 | } |
| 12292 | } |
| 12293 | |
| 12294 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
| 12295 | by PER_CU. This is for the non-DWP case. |
| 12296 | The result is NULL if DWO_NAME can't be found. */ |
| 12297 | |
| 12298 | static struct dwo_file * |
| 12299 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
| 12300 | const char *dwo_name, const char *comp_dir) |
| 12301 | { |
| 12302 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 12303 | |
| 12304 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
| 12305 | if (dbfd == NULL) |
| 12306 | { |
| 12307 | if (dwarf_read_debug) |
| 12308 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
| 12309 | return NULL; |
| 12310 | } |
| 12311 | |
| 12312 | dwo_file_up dwo_file (new struct dwo_file); |
| 12313 | dwo_file->dwo_name = dwo_name; |
| 12314 | dwo_file->comp_dir = comp_dir; |
| 12315 | dwo_file->dbfd = std::move (dbfd); |
| 12316 | |
| 12317 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
| 12318 | &dwo_file->sections); |
| 12319 | |
| 12320 | create_cus_hash_table (dwarf2_per_objfile, per_cu->cu, *dwo_file, |
| 12321 | dwo_file->sections.info, dwo_file->cus); |
| 12322 | |
| 12323 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
| 12324 | dwo_file->sections.types, dwo_file->tus); |
| 12325 | |
| 12326 | if (dwarf_read_debug) |
| 12327 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
| 12328 | |
| 12329 | return dwo_file.release (); |
| 12330 | } |
| 12331 | |
| 12332 | /* This function is mapped across the sections and remembers the offset and |
| 12333 | size of each of the DWP debugging sections common to version 1 and 2 that |
| 12334 | we are interested in. */ |
| 12335 | |
| 12336 | static void |
| 12337 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
| 12338 | void *dwp_file_ptr) |
| 12339 | { |
| 12340 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
| 12341 | const struct dwop_section_names *names = &dwop_section_names; |
| 12342 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; |
| 12343 | |
| 12344 | /* Record the ELF section number for later lookup: this is what the |
| 12345 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
| 12346 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
| 12347 | dwp_file->elf_sections[elf_section_nr] = sectp; |
| 12348 | |
| 12349 | /* Look for specific sections that we need. */ |
| 12350 | if (section_is_p (sectp->name, &names->str_dwo)) |
| 12351 | { |
| 12352 | dwp_file->sections.str.s.section = sectp; |
| 12353 | dwp_file->sections.str.size = bfd_section_size (sectp); |
| 12354 | } |
| 12355 | else if (section_is_p (sectp->name, &names->cu_index)) |
| 12356 | { |
| 12357 | dwp_file->sections.cu_index.s.section = sectp; |
| 12358 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
| 12359 | } |
| 12360 | else if (section_is_p (sectp->name, &names->tu_index)) |
| 12361 | { |
| 12362 | dwp_file->sections.tu_index.s.section = sectp; |
| 12363 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
| 12364 | } |
| 12365 | } |
| 12366 | |
| 12367 | /* This function is mapped across the sections and remembers the offset and |
| 12368 | size of each of the DWP version 2 debugging sections that we are interested |
| 12369 | in. This is split into a separate function because we don't know if we |
| 12370 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ |
| 12371 | |
| 12372 | static void |
| 12373 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) |
| 12374 | { |
| 12375 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
| 12376 | const struct dwop_section_names *names = &dwop_section_names; |
| 12377 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; |
| 12378 | |
| 12379 | /* Record the ELF section number for later lookup: this is what the |
| 12380 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
| 12381 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
| 12382 | dwp_file->elf_sections[elf_section_nr] = sectp; |
| 12383 | |
| 12384 | /* Look for specific sections that we need. */ |
| 12385 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 12386 | { |
| 12387 | dwp_file->sections.abbrev.s.section = sectp; |
| 12388 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
| 12389 | } |
| 12390 | else if (section_is_p (sectp->name, &names->info_dwo)) |
| 12391 | { |
| 12392 | dwp_file->sections.info.s.section = sectp; |
| 12393 | dwp_file->sections.info.size = bfd_section_size (sectp); |
| 12394 | } |
| 12395 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 12396 | { |
| 12397 | dwp_file->sections.line.s.section = sectp; |
| 12398 | dwp_file->sections.line.size = bfd_section_size (sectp); |
| 12399 | } |
| 12400 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 12401 | { |
| 12402 | dwp_file->sections.loc.s.section = sectp; |
| 12403 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
| 12404 | } |
| 12405 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 12406 | { |
| 12407 | dwp_file->sections.macinfo.s.section = sectp; |
| 12408 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
| 12409 | } |
| 12410 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 12411 | { |
| 12412 | dwp_file->sections.macro.s.section = sectp; |
| 12413 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
| 12414 | } |
| 12415 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 12416 | { |
| 12417 | dwp_file->sections.str_offsets.s.section = sectp; |
| 12418 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
| 12419 | } |
| 12420 | else if (section_is_p (sectp->name, &names->types_dwo)) |
| 12421 | { |
| 12422 | dwp_file->sections.types.s.section = sectp; |
| 12423 | dwp_file->sections.types.size = bfd_section_size (sectp); |
| 12424 | } |
| 12425 | } |
| 12426 | |
| 12427 | /* Hash function for dwp_file loaded CUs/TUs. */ |
| 12428 | |
| 12429 | static hashval_t |
| 12430 | hash_dwp_loaded_cutus (const void *item) |
| 12431 | { |
| 12432 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
| 12433 | |
| 12434 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
| 12435 | return dwo_unit->signature; |
| 12436 | } |
| 12437 | |
| 12438 | /* Equality function for dwp_file loaded CUs/TUs. */ |
| 12439 | |
| 12440 | static int |
| 12441 | eq_dwp_loaded_cutus (const void *a, const void *b) |
| 12442 | { |
| 12443 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
| 12444 | const struct dwo_unit *dub = (const struct dwo_unit *) b; |
| 12445 | |
| 12446 | return dua->signature == dub->signature; |
| 12447 | } |
| 12448 | |
| 12449 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
| 12450 | |
| 12451 | static htab_up |
| 12452 | allocate_dwp_loaded_cutus_table () |
| 12453 | { |
| 12454 | return htab_up (htab_create_alloc (3, |
| 12455 | hash_dwp_loaded_cutus, |
| 12456 | eq_dwp_loaded_cutus, |
| 12457 | NULL, xcalloc, xfree)); |
| 12458 | } |
| 12459 | |
| 12460 | /* Try to open DWP file FILE_NAME. |
| 12461 | The result is the bfd handle of the file. |
| 12462 | If there is a problem finding or opening the file, return NULL. |
| 12463 | Upon success, the canonicalized path of the file is stored in the bfd, |
| 12464 | same as symfile_bfd_open. */ |
| 12465 | |
| 12466 | static gdb_bfd_ref_ptr |
| 12467 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12468 | const char *file_name) |
| 12469 | { |
| 12470 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 12471 | 1 /*is_dwp*/, |
| 12472 | 1 /*search_cwd*/)); |
| 12473 | if (abfd != NULL) |
| 12474 | return abfd; |
| 12475 | |
| 12476 | /* Work around upstream bug 15652. |
| 12477 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 |
| 12478 | [Whether that's a "bug" is debatable, but it is getting in our way.] |
| 12479 | We have no real idea where the dwp file is, because gdb's realpath-ing |
| 12480 | of the executable's path may have discarded the needed info. |
| 12481 | [IWBN if the dwp file name was recorded in the executable, akin to |
| 12482 | .gnu_debuglink, but that doesn't exist yet.] |
| 12483 | Strip the directory from FILE_NAME and search again. */ |
| 12484 | if (*debug_file_directory != '\0') |
| 12485 | { |
| 12486 | /* Don't implicitly search the current directory here. |
| 12487 | If the user wants to search "." to handle this case, |
| 12488 | it must be added to debug-file-directory. */ |
| 12489 | return try_open_dwop_file (dwarf2_per_objfile, |
| 12490 | lbasename (file_name), 1 /*is_dwp*/, |
| 12491 | 0 /*search_cwd*/); |
| 12492 | } |
| 12493 | |
| 12494 | return NULL; |
| 12495 | } |
| 12496 | |
| 12497 | /* Initialize the use of the DWP file for the current objfile. |
| 12498 | By convention the name of the DWP file is ${objfile}.dwp. |
| 12499 | The result is NULL if it can't be found. */ |
| 12500 | |
| 12501 | static std::unique_ptr<struct dwp_file> |
| 12502 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 12503 | { |
| 12504 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 12505 | |
| 12506 | /* Try to find first .dwp for the binary file before any symbolic links |
| 12507 | resolving. */ |
| 12508 | |
| 12509 | /* If the objfile is a debug file, find the name of the real binary |
| 12510 | file and get the name of dwp file from there. */ |
| 12511 | std::string dwp_name; |
| 12512 | if (objfile->separate_debug_objfile_backlink != NULL) |
| 12513 | { |
| 12514 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; |
| 12515 | const char *backlink_basename = lbasename (backlink->original_name); |
| 12516 | |
| 12517 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
| 12518 | } |
| 12519 | else |
| 12520 | dwp_name = objfile->original_name; |
| 12521 | |
| 12522 | dwp_name += ".dwp"; |
| 12523 | |
| 12524 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
| 12525 | if (dbfd == NULL |
| 12526 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) |
| 12527 | { |
| 12528 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ |
| 12529 | dwp_name = objfile_name (objfile); |
| 12530 | dwp_name += ".dwp"; |
| 12531 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
| 12532 | } |
| 12533 | |
| 12534 | if (dbfd == NULL) |
| 12535 | { |
| 12536 | if (dwarf_read_debug) |
| 12537 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
| 12538 | return std::unique_ptr<dwp_file> (); |
| 12539 | } |
| 12540 | |
| 12541 | const char *name = bfd_get_filename (dbfd.get ()); |
| 12542 | std::unique_ptr<struct dwp_file> dwp_file |
| 12543 | (new struct dwp_file (name, std::move (dbfd))); |
| 12544 | |
| 12545 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
| 12546 | dwp_file->elf_sections = |
| 12547 | OBSTACK_CALLOC (&objfile->objfile_obstack, |
| 12548 | dwp_file->num_sections, asection *); |
| 12549 | |
| 12550 | bfd_map_over_sections (dwp_file->dbfd.get (), |
| 12551 | dwarf2_locate_common_dwp_sections, |
| 12552 | dwp_file.get ()); |
| 12553 | |
| 12554 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
| 12555 | 0); |
| 12556 | |
| 12557 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
| 12558 | 1); |
| 12559 | |
| 12560 | /* The DWP file version is stored in the hash table. Oh well. */ |
| 12561 | if (dwp_file->cus && dwp_file->tus |
| 12562 | && dwp_file->cus->version != dwp_file->tus->version) |
| 12563 | { |
| 12564 | /* Technically speaking, we should try to limp along, but this is |
| 12565 | pretty bizarre. We use pulongest here because that's the established |
| 12566 | portability solution (e.g, we cannot use %u for uint32_t). */ |
| 12567 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
| 12568 | " TU version %s [in DWP file %s]"), |
| 12569 | pulongest (dwp_file->cus->version), |
| 12570 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
| 12571 | } |
| 12572 | |
| 12573 | if (dwp_file->cus) |
| 12574 | dwp_file->version = dwp_file->cus->version; |
| 12575 | else if (dwp_file->tus) |
| 12576 | dwp_file->version = dwp_file->tus->version; |
| 12577 | else |
| 12578 | dwp_file->version = 2; |
| 12579 | |
| 12580 | if (dwp_file->version == 2) |
| 12581 | bfd_map_over_sections (dwp_file->dbfd.get (), |
| 12582 | dwarf2_locate_v2_dwp_sections, |
| 12583 | dwp_file.get ()); |
| 12584 | |
| 12585 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
| 12586 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); |
| 12587 | |
| 12588 | if (dwarf_read_debug) |
| 12589 | { |
| 12590 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); |
| 12591 | fprintf_unfiltered (gdb_stdlog, |
| 12592 | " %s CUs, %s TUs\n", |
| 12593 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), |
| 12594 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); |
| 12595 | } |
| 12596 | |
| 12597 | return dwp_file; |
| 12598 | } |
| 12599 | |
| 12600 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
| 12601 | |
| 12602 | static struct dwp_file * |
| 12603 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 12604 | { |
| 12605 | if (! dwarf2_per_objfile->dwp_checked) |
| 12606 | { |
| 12607 | dwarf2_per_objfile->dwp_file |
| 12608 | = open_and_init_dwp_file (dwarf2_per_objfile); |
| 12609 | dwarf2_per_objfile->dwp_checked = 1; |
| 12610 | } |
| 12611 | return dwarf2_per_objfile->dwp_file.get (); |
| 12612 | } |
| 12613 | |
| 12614 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
| 12615 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME |
| 12616 | or in the DWP file for the objfile, referenced by THIS_UNIT. |
| 12617 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
| 12618 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
| 12619 | |
| 12620 | This is called, for example, when wanting to read a variable with a |
| 12621 | complex location. Therefore we don't want to do file i/o for every call. |
| 12622 | Therefore we don't want to look for a DWO file on every call. |
| 12623 | Therefore we first see if we've already seen SIGNATURE in a DWP file, |
| 12624 | then we check if we've already seen DWO_NAME, and only THEN do we check |
| 12625 | for a DWO file. |
| 12626 | |
| 12627 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
| 12628 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
| 12629 | |
| 12630 | static struct dwo_unit * |
| 12631 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
| 12632 | const char *dwo_name, const char *comp_dir, |
| 12633 | ULONGEST signature, int is_debug_types) |
| 12634 | { |
| 12635 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
| 12636 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 12637 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 12638 | void **dwo_file_slot; |
| 12639 | struct dwo_file *dwo_file; |
| 12640 | struct dwp_file *dwp_file; |
| 12641 | |
| 12642 | /* First see if there's a DWP file. |
| 12643 | If we have a DWP file but didn't find the DWO inside it, don't |
| 12644 | look for the original DWO file. It makes gdb behave differently |
| 12645 | depending on whether one is debugging in the build tree. */ |
| 12646 | |
| 12647 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
| 12648 | if (dwp_file != NULL) |
| 12649 | { |
| 12650 | const struct dwp_hash_table *dwp_htab = |
| 12651 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 12652 | |
| 12653 | if (dwp_htab != NULL) |
| 12654 | { |
| 12655 | struct dwo_unit *dwo_cutu = |
| 12656 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
| 12657 | signature, is_debug_types); |
| 12658 | |
| 12659 | if (dwo_cutu != NULL) |
| 12660 | { |
| 12661 | if (dwarf_read_debug) |
| 12662 | { |
| 12663 | fprintf_unfiltered (gdb_stdlog, |
| 12664 | "Virtual DWO %s %s found: @%s\n", |
| 12665 | kind, hex_string (signature), |
| 12666 | host_address_to_string (dwo_cutu)); |
| 12667 | } |
| 12668 | return dwo_cutu; |
| 12669 | } |
| 12670 | } |
| 12671 | } |
| 12672 | else |
| 12673 | { |
| 12674 | /* No DWP file, look for the DWO file. */ |
| 12675 | |
| 12676 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 12677 | dwo_name, comp_dir); |
| 12678 | if (*dwo_file_slot == NULL) |
| 12679 | { |
| 12680 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
| 12681 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); |
| 12682 | } |
| 12683 | /* NOTE: This will be NULL if unable to open the file. */ |
| 12684 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 12685 | |
| 12686 | if (dwo_file != NULL) |
| 12687 | { |
| 12688 | struct dwo_unit *dwo_cutu = NULL; |
| 12689 | |
| 12690 | if (is_debug_types && dwo_file->tus) |
| 12691 | { |
| 12692 | struct dwo_unit find_dwo_cutu; |
| 12693 | |
| 12694 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
| 12695 | find_dwo_cutu.signature = signature; |
| 12696 | dwo_cutu |
| 12697 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
| 12698 | &find_dwo_cutu); |
| 12699 | } |
| 12700 | else if (!is_debug_types && dwo_file->cus) |
| 12701 | { |
| 12702 | struct dwo_unit find_dwo_cutu; |
| 12703 | |
| 12704 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
| 12705 | find_dwo_cutu.signature = signature; |
| 12706 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
| 12707 | &find_dwo_cutu); |
| 12708 | } |
| 12709 | |
| 12710 | if (dwo_cutu != NULL) |
| 12711 | { |
| 12712 | if (dwarf_read_debug) |
| 12713 | { |
| 12714 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", |
| 12715 | kind, dwo_name, hex_string (signature), |
| 12716 | host_address_to_string (dwo_cutu)); |
| 12717 | } |
| 12718 | return dwo_cutu; |
| 12719 | } |
| 12720 | } |
| 12721 | } |
| 12722 | |
| 12723 | /* We didn't find it. This could mean a dwo_id mismatch, or |
| 12724 | someone deleted the DWO/DWP file, or the search path isn't set up |
| 12725 | correctly to find the file. */ |
| 12726 | |
| 12727 | if (dwarf_read_debug) |
| 12728 | { |
| 12729 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", |
| 12730 | kind, dwo_name, hex_string (signature)); |
| 12731 | } |
| 12732 | |
| 12733 | /* This is a warning and not a complaint because it can be caused by |
| 12734 | pilot error (e.g., user accidentally deleting the DWO). */ |
| 12735 | { |
| 12736 | /* Print the name of the DWP file if we looked there, helps the user |
| 12737 | better diagnose the problem. */ |
| 12738 | std::string dwp_text; |
| 12739 | |
| 12740 | if (dwp_file != NULL) |
| 12741 | dwp_text = string_printf (" [in DWP file %s]", |
| 12742 | lbasename (dwp_file->name)); |
| 12743 | |
| 12744 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
| 12745 | " [in module %s]"), |
| 12746 | kind, dwo_name, hex_string (signature), |
| 12747 | dwp_text.c_str (), |
| 12748 | this_unit->is_debug_types ? "TU" : "CU", |
| 12749 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
| 12750 | } |
| 12751 | return NULL; |
| 12752 | } |
| 12753 | |
| 12754 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
| 12755 | See lookup_dwo_cutu_unit for details. */ |
| 12756 | |
| 12757 | static struct dwo_unit * |
| 12758 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 12759 | const char *dwo_name, const char *comp_dir, |
| 12760 | ULONGEST signature) |
| 12761 | { |
| 12762 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); |
| 12763 | } |
| 12764 | |
| 12765 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. |
| 12766 | See lookup_dwo_cutu_unit for details. */ |
| 12767 | |
| 12768 | static struct dwo_unit * |
| 12769 | lookup_dwo_type_unit (struct signatured_type *this_tu, |
| 12770 | const char *dwo_name, const char *comp_dir) |
| 12771 | { |
| 12772 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); |
| 12773 | } |
| 12774 | |
| 12775 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
| 12776 | |
| 12777 | static int |
| 12778 | queue_and_load_dwo_tu (void **slot, void *info) |
| 12779 | { |
| 12780 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; |
| 12781 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; |
| 12782 | ULONGEST signature = dwo_unit->signature; |
| 12783 | struct signatured_type *sig_type = |
| 12784 | lookup_dwo_signatured_type (per_cu->cu, signature); |
| 12785 | |
| 12786 | if (sig_type != NULL) |
| 12787 | { |
| 12788 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; |
| 12789 | |
| 12790 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's |
| 12791 | a real dependency of PER_CU on SIG_TYPE. That is detected later |
| 12792 | while processing PER_CU. */ |
| 12793 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) |
| 12794 | load_full_type_unit (sig_cu); |
| 12795 | per_cu->imported_symtabs_push (sig_cu); |
| 12796 | } |
| 12797 | |
| 12798 | return 1; |
| 12799 | } |
| 12800 | |
| 12801 | /* Queue all TUs contained in the DWO of PER_CU to be read in. |
| 12802 | The DWO may have the only definition of the type, though it may not be |
| 12803 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. |
| 12804 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ |
| 12805 | |
| 12806 | static void |
| 12807 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) |
| 12808 | { |
| 12809 | struct dwo_unit *dwo_unit; |
| 12810 | struct dwo_file *dwo_file; |
| 12811 | |
| 12812 | gdb_assert (!per_cu->is_debug_types); |
| 12813 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
| 12814 | gdb_assert (per_cu->cu != NULL); |
| 12815 | |
| 12816 | dwo_unit = per_cu->cu->dwo_unit; |
| 12817 | gdb_assert (dwo_unit != NULL); |
| 12818 | |
| 12819 | dwo_file = dwo_unit->dwo_file; |
| 12820 | if (dwo_file->tus != NULL) |
| 12821 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, |
| 12822 | per_cu); |
| 12823 | } |
| 12824 | |
| 12825 | /* Read in various DIEs. */ |
| 12826 | |
| 12827 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
| 12828 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
| 12829 | already referenced by DW_AT_abstract_origin from the children of the |
| 12830 | current DIE. */ |
| 12831 | |
| 12832 | static void |
| 12833 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) |
| 12834 | { |
| 12835 | struct die_info *child_die; |
| 12836 | sect_offset *offsetp; |
| 12837 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
| 12838 | struct die_info *origin_die; |
| 12839 | /* Iterator of the ORIGIN_DIE children. */ |
| 12840 | struct die_info *origin_child_die; |
| 12841 | struct attribute *attr; |
| 12842 | struct dwarf2_cu *origin_cu; |
| 12843 | struct pending **origin_previous_list_in_scope; |
| 12844 | |
| 12845 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); |
| 12846 | if (!attr) |
| 12847 | return; |
| 12848 | |
| 12849 | /* Note that following die references may follow to a die in a |
| 12850 | different cu. */ |
| 12851 | |
| 12852 | origin_cu = cu; |
| 12853 | origin_die = follow_die_ref (die, attr, &origin_cu); |
| 12854 | |
| 12855 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's |
| 12856 | symbols in. */ |
| 12857 | origin_previous_list_in_scope = origin_cu->list_in_scope; |
| 12858 | origin_cu->list_in_scope = cu->list_in_scope; |
| 12859 | |
| 12860 | if (die->tag != origin_die->tag |
| 12861 | && !(die->tag == DW_TAG_inlined_subroutine |
| 12862 | && origin_die->tag == DW_TAG_subprogram)) |
| 12863 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
| 12864 | sect_offset_str (die->sect_off), |
| 12865 | sect_offset_str (origin_die->sect_off)); |
| 12866 | |
| 12867 | std::vector<sect_offset> offsets; |
| 12868 | |
| 12869 | for (child_die = die->child; |
| 12870 | child_die && child_die->tag; |
| 12871 | child_die = child_die->sibling) |
| 12872 | { |
| 12873 | struct die_info *child_origin_die; |
| 12874 | struct dwarf2_cu *child_origin_cu; |
| 12875 | |
| 12876 | /* We are trying to process concrete instance entries: |
| 12877 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
| 12878 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
| 12879 | present in the abstract instance but not referenced in the concrete |
| 12880 | one. */ |
| 12881 | if (child_die->tag == DW_TAG_call_site |
| 12882 | || child_die->tag == DW_TAG_GNU_call_site) |
| 12883 | continue; |
| 12884 | |
| 12885 | /* For each CHILD_DIE, find the corresponding child of |
| 12886 | ORIGIN_DIE. If there is more than one layer of |
| 12887 | DW_AT_abstract_origin, follow them all; there shouldn't be, |
| 12888 | but GCC versions at least through 4.4 generate this (GCC PR |
| 12889 | 40573). */ |
| 12890 | child_origin_die = child_die; |
| 12891 | child_origin_cu = cu; |
| 12892 | while (1) |
| 12893 | { |
| 12894 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
| 12895 | child_origin_cu); |
| 12896 | if (attr == NULL) |
| 12897 | break; |
| 12898 | child_origin_die = follow_die_ref (child_origin_die, attr, |
| 12899 | &child_origin_cu); |
| 12900 | } |
| 12901 | |
| 12902 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
| 12903 | counterpart may exist. */ |
| 12904 | if (child_origin_die != child_die) |
| 12905 | { |
| 12906 | if (child_die->tag != child_origin_die->tag |
| 12907 | && !(child_die->tag == DW_TAG_inlined_subroutine |
| 12908 | && child_origin_die->tag == DW_TAG_subprogram)) |
| 12909 | complaint (_("Child DIE %s and its abstract origin %s have " |
| 12910 | "different tags"), |
| 12911 | sect_offset_str (child_die->sect_off), |
| 12912 | sect_offset_str (child_origin_die->sect_off)); |
| 12913 | if (child_origin_die->parent != origin_die) |
| 12914 | complaint (_("Child DIE %s and its abstract origin %s have " |
| 12915 | "different parents"), |
| 12916 | sect_offset_str (child_die->sect_off), |
| 12917 | sect_offset_str (child_origin_die->sect_off)); |
| 12918 | else |
| 12919 | offsets.push_back (child_origin_die->sect_off); |
| 12920 | } |
| 12921 | } |
| 12922 | std::sort (offsets.begin (), offsets.end ()); |
| 12923 | sect_offset *offsets_end = offsets.data () + offsets.size (); |
| 12924 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) |
| 12925 | if (offsetp[-1] == *offsetp) |
| 12926 | complaint (_("Multiple children of DIE %s refer " |
| 12927 | "to DIE %s as their abstract origin"), |
| 12928 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); |
| 12929 | |
| 12930 | offsetp = offsets.data (); |
| 12931 | origin_child_die = origin_die->child; |
| 12932 | while (origin_child_die && origin_child_die->tag) |
| 12933 | { |
| 12934 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ |
| 12935 | while (offsetp < offsets_end |
| 12936 | && *offsetp < origin_child_die->sect_off) |
| 12937 | offsetp++; |
| 12938 | if (offsetp >= offsets_end |
| 12939 | || *offsetp > origin_child_die->sect_off) |
| 12940 | { |
| 12941 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
| 12942 | Check whether we're already processing ORIGIN_CHILD_DIE. |
| 12943 | This can happen with mutually referenced abstract_origins. |
| 12944 | PR 16581. */ |
| 12945 | if (!origin_child_die->in_process) |
| 12946 | process_die (origin_child_die, origin_cu); |
| 12947 | } |
| 12948 | origin_child_die = origin_child_die->sibling; |
| 12949 | } |
| 12950 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
| 12951 | |
| 12952 | if (cu != origin_cu) |
| 12953 | compute_delayed_physnames (origin_cu); |
| 12954 | } |
| 12955 | |
| 12956 | static void |
| 12957 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 12958 | { |
| 12959 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 12960 | struct gdbarch *gdbarch = objfile->arch (); |
| 12961 | struct context_stack *newobj; |
| 12962 | CORE_ADDR lowpc; |
| 12963 | CORE_ADDR highpc; |
| 12964 | struct die_info *child_die; |
| 12965 | struct attribute *attr, *call_line, *call_file; |
| 12966 | const char *name; |
| 12967 | CORE_ADDR baseaddr; |
| 12968 | struct block *block; |
| 12969 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
| 12970 | std::vector<struct symbol *> template_args; |
| 12971 | struct template_symbol *templ_func = NULL; |
| 12972 | |
| 12973 | if (inlined_func) |
| 12974 | { |
| 12975 | /* If we do not have call site information, we can't show the |
| 12976 | caller of this inlined function. That's too confusing, so |
| 12977 | only use the scope for local variables. */ |
| 12978 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); |
| 12979 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); |
| 12980 | if (call_line == NULL || call_file == NULL) |
| 12981 | { |
| 12982 | read_lexical_block_scope (die, cu); |
| 12983 | return; |
| 12984 | } |
| 12985 | } |
| 12986 | |
| 12987 | baseaddr = objfile->text_section_offset (); |
| 12988 | |
| 12989 | name = dwarf2_name (die, cu); |
| 12990 | |
| 12991 | /* Ignore functions with missing or empty names. These are actually |
| 12992 | illegal according to the DWARF standard. */ |
| 12993 | if (name == NULL) |
| 12994 | { |
| 12995 | complaint (_("missing name for subprogram DIE at %s"), |
| 12996 | sect_offset_str (die->sect_off)); |
| 12997 | return; |
| 12998 | } |
| 12999 | |
| 13000 | /* Ignore functions with missing or invalid low and high pc attributes. */ |
| 13001 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
| 13002 | <= PC_BOUNDS_INVALID) |
| 13003 | { |
| 13004 | attr = dwarf2_attr (die, DW_AT_external, cu); |
| 13005 | if (!attr || !DW_UNSND (attr)) |
| 13006 | complaint (_("cannot get low and high bounds " |
| 13007 | "for subprogram DIE at %s"), |
| 13008 | sect_offset_str (die->sect_off)); |
| 13009 | return; |
| 13010 | } |
| 13011 | |
| 13012 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 13013 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 13014 | |
| 13015 | /* If we have any template arguments, then we must allocate a |
| 13016 | different sort of symbol. */ |
| 13017 | for (child_die = die->child; child_die; child_die = child_die->sibling) |
| 13018 | { |
| 13019 | if (child_die->tag == DW_TAG_template_type_param |
| 13020 | || child_die->tag == DW_TAG_template_value_param) |
| 13021 | { |
| 13022 | templ_func = new (&objfile->objfile_obstack) template_symbol; |
| 13023 | templ_func->subclass = SYMBOL_TEMPLATE; |
| 13024 | break; |
| 13025 | } |
| 13026 | } |
| 13027 | |
| 13028 | newobj = cu->get_builder ()->push_context (0, lowpc); |
| 13029 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
| 13030 | (struct symbol *) templ_func); |
| 13031 | |
| 13032 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
| 13033 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
| 13034 | cu->language); |
| 13035 | |
| 13036 | /* If there is a location expression for DW_AT_frame_base, record |
| 13037 | it. */ |
| 13038 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
| 13039 | if (attr != nullptr) |
| 13040 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
| 13041 | |
| 13042 | /* If there is a location for the static link, record it. */ |
| 13043 | newobj->static_link = NULL; |
| 13044 | attr = dwarf2_attr (die, DW_AT_static_link, cu); |
| 13045 | if (attr != nullptr) |
| 13046 | { |
| 13047 | newobj->static_link |
| 13048 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); |
| 13049 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
| 13050 | cu->per_cu->addr_type ()); |
| 13051 | } |
| 13052 | |
| 13053 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
| 13054 | |
| 13055 | if (die->child != NULL) |
| 13056 | { |
| 13057 | child_die = die->child; |
| 13058 | while (child_die && child_die->tag) |
| 13059 | { |
| 13060 | if (child_die->tag == DW_TAG_template_type_param |
| 13061 | || child_die->tag == DW_TAG_template_value_param) |
| 13062 | { |
| 13063 | struct symbol *arg = new_symbol (child_die, NULL, cu); |
| 13064 | |
| 13065 | if (arg != NULL) |
| 13066 | template_args.push_back (arg); |
| 13067 | } |
| 13068 | else |
| 13069 | process_die (child_die, cu); |
| 13070 | child_die = child_die->sibling; |
| 13071 | } |
| 13072 | } |
| 13073 | |
| 13074 | inherit_abstract_dies (die, cu); |
| 13075 | |
| 13076 | /* If we have a DW_AT_specification, we might need to import using |
| 13077 | directives from the context of the specification DIE. See the |
| 13078 | comment in determine_prefix. */ |
| 13079 | if (cu->language == language_cplus |
| 13080 | && dwarf2_attr (die, DW_AT_specification, cu)) |
| 13081 | { |
| 13082 | struct dwarf2_cu *spec_cu = cu; |
| 13083 | struct die_info *spec_die = die_specification (die, &spec_cu); |
| 13084 | |
| 13085 | while (spec_die) |
| 13086 | { |
| 13087 | child_die = spec_die->child; |
| 13088 | while (child_die && child_die->tag) |
| 13089 | { |
| 13090 | if (child_die->tag == DW_TAG_imported_module) |
| 13091 | process_die (child_die, spec_cu); |
| 13092 | child_die = child_die->sibling; |
| 13093 | } |
| 13094 | |
| 13095 | /* In some cases, GCC generates specification DIEs that |
| 13096 | themselves contain DW_AT_specification attributes. */ |
| 13097 | spec_die = die_specification (spec_die, &spec_cu); |
| 13098 | } |
| 13099 | } |
| 13100 | |
| 13101 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
| 13102 | /* Make a block for the local symbols within. */ |
| 13103 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
| 13104 | cstk.static_link, lowpc, highpc); |
| 13105 | |
| 13106 | /* For C++, set the block's scope. */ |
| 13107 | if ((cu->language == language_cplus |
| 13108 | || cu->language == language_fortran |
| 13109 | || cu->language == language_d |
| 13110 | || cu->language == language_rust) |
| 13111 | && cu->processing_has_namespace_info) |
| 13112 | block_set_scope (block, determine_prefix (die, cu), |
| 13113 | &objfile->objfile_obstack); |
| 13114 | |
| 13115 | /* If we have address ranges, record them. */ |
| 13116 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
| 13117 | |
| 13118 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
| 13119 | |
| 13120 | /* Attach template arguments to function. */ |
| 13121 | if (!template_args.empty ()) |
| 13122 | { |
| 13123 | gdb_assert (templ_func != NULL); |
| 13124 | |
| 13125 | templ_func->n_template_arguments = template_args.size (); |
| 13126 | templ_func->template_arguments |
| 13127 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
| 13128 | templ_func->n_template_arguments); |
| 13129 | memcpy (templ_func->template_arguments, |
| 13130 | template_args.data (), |
| 13131 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
| 13132 | |
| 13133 | /* Make sure that the symtab is set on the new symbols. Even |
| 13134 | though they don't appear in this symtab directly, other parts |
| 13135 | of gdb assume that symbols do, and this is reasonably |
| 13136 | true. */ |
| 13137 | for (symbol *sym : template_args) |
| 13138 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
| 13139 | } |
| 13140 | |
| 13141 | /* In C++, we can have functions nested inside functions (e.g., when |
| 13142 | a function declares a class that has methods). This means that |
| 13143 | when we finish processing a function scope, we may need to go |
| 13144 | back to building a containing block's symbol lists. */ |
| 13145 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
| 13146 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); |
| 13147 | |
| 13148 | /* If we've finished processing a top-level function, subsequent |
| 13149 | symbols go in the file symbol list. */ |
| 13150 | if (cu->get_builder ()->outermost_context_p ()) |
| 13151 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); |
| 13152 | } |
| 13153 | |
| 13154 | /* Process all the DIES contained within a lexical block scope. Start |
| 13155 | a new scope, process the dies, and then close the scope. */ |
| 13156 | |
| 13157 | static void |
| 13158 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 13159 | { |
| 13160 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13161 | struct gdbarch *gdbarch = objfile->arch (); |
| 13162 | CORE_ADDR lowpc, highpc; |
| 13163 | struct die_info *child_die; |
| 13164 | CORE_ADDR baseaddr; |
| 13165 | |
| 13166 | baseaddr = objfile->text_section_offset (); |
| 13167 | |
| 13168 | /* Ignore blocks with missing or invalid low and high pc attributes. */ |
| 13169 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
| 13170 | as multiple lexical blocks? Handling children in a sane way would |
| 13171 | be nasty. Might be easier to properly extend generic blocks to |
| 13172 | describe ranges. */ |
| 13173 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
| 13174 | { |
| 13175 | case PC_BOUNDS_NOT_PRESENT: |
| 13176 | /* DW_TAG_lexical_block has no attributes, process its children as if |
| 13177 | there was no wrapping by that DW_TAG_lexical_block. |
| 13178 | GCC does no longer produces such DWARF since GCC r224161. */ |
| 13179 | for (child_die = die->child; |
| 13180 | child_die != NULL && child_die->tag; |
| 13181 | child_die = child_die->sibling) |
| 13182 | { |
| 13183 | /* We might already be processing this DIE. This can happen |
| 13184 | in an unusual circumstance -- where a subroutine A |
| 13185 | appears lexically in another subroutine B, but A actually |
| 13186 | inlines B. The recursion is broken here, rather than in |
| 13187 | inherit_abstract_dies, because it seems better to simply |
| 13188 | drop concrete children here. */ |
| 13189 | if (!child_die->in_process) |
| 13190 | process_die (child_die, cu); |
| 13191 | } |
| 13192 | return; |
| 13193 | case PC_BOUNDS_INVALID: |
| 13194 | return; |
| 13195 | } |
| 13196 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 13197 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 13198 | |
| 13199 | cu->get_builder ()->push_context (0, lowpc); |
| 13200 | if (die->child != NULL) |
| 13201 | { |
| 13202 | child_die = die->child; |
| 13203 | while (child_die && child_die->tag) |
| 13204 | { |
| 13205 | process_die (child_die, cu); |
| 13206 | child_die = child_die->sibling; |
| 13207 | } |
| 13208 | } |
| 13209 | inherit_abstract_dies (die, cu); |
| 13210 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
| 13211 | |
| 13212 | if (*cu->get_builder ()->get_local_symbols () != NULL |
| 13213 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) |
| 13214 | { |
| 13215 | struct block *block |
| 13216 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
| 13217 | cstk.start_addr, highpc); |
| 13218 | |
| 13219 | /* Note that recording ranges after traversing children, as we |
| 13220 | do here, means that recording a parent's ranges entails |
| 13221 | walking across all its children's ranges as they appear in |
| 13222 | the address map, which is quadratic behavior. |
| 13223 | |
| 13224 | It would be nicer to record the parent's ranges before |
| 13225 | traversing its children, simply overriding whatever you find |
| 13226 | there. But since we don't even decide whether to create a |
| 13227 | block until after we've traversed its children, that's hard |
| 13228 | to do. */ |
| 13229 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
| 13230 | } |
| 13231 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
| 13232 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); |
| 13233 | } |
| 13234 | |
| 13235 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
| 13236 | |
| 13237 | static void |
| 13238 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 13239 | { |
| 13240 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13241 | struct gdbarch *gdbarch = objfile->arch (); |
| 13242 | CORE_ADDR pc, baseaddr; |
| 13243 | struct attribute *attr; |
| 13244 | struct call_site *call_site, call_site_local; |
| 13245 | void **slot; |
| 13246 | int nparams; |
| 13247 | struct die_info *child_die; |
| 13248 | |
| 13249 | baseaddr = objfile->text_section_offset (); |
| 13250 | |
| 13251 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
| 13252 | if (attr == NULL) |
| 13253 | { |
| 13254 | /* This was a pre-DWARF-5 GNU extension alias |
| 13255 | for DW_AT_call_return_pc. */ |
| 13256 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 13257 | } |
| 13258 | if (!attr) |
| 13259 | { |
| 13260 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
| 13261 | "DIE %s [in module %s]"), |
| 13262 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 13263 | return; |
| 13264 | } |
| 13265 | pc = attr->value_as_address () + baseaddr; |
| 13266 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
| 13267 | |
| 13268 | if (cu->call_site_htab == NULL) |
| 13269 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, |
| 13270 | NULL, &objfile->objfile_obstack, |
| 13271 | hashtab_obstack_allocate, NULL); |
| 13272 | call_site_local.pc = pc; |
| 13273 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); |
| 13274 | if (*slot != NULL) |
| 13275 | { |
| 13276 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
| 13277 | "DIE %s [in module %s]"), |
| 13278 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), |
| 13279 | objfile_name (objfile)); |
| 13280 | return; |
| 13281 | } |
| 13282 | |
| 13283 | /* Count parameters at the caller. */ |
| 13284 | |
| 13285 | nparams = 0; |
| 13286 | for (child_die = die->child; child_die && child_die->tag; |
| 13287 | child_die = child_die->sibling) |
| 13288 | { |
| 13289 | if (child_die->tag != DW_TAG_call_site_parameter |
| 13290 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
| 13291 | { |
| 13292 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
| 13293 | "DW_TAG_call_site child DIE %s [in module %s]"), |
| 13294 | child_die->tag, sect_offset_str (child_die->sect_off), |
| 13295 | objfile_name (objfile)); |
| 13296 | continue; |
| 13297 | } |
| 13298 | |
| 13299 | nparams++; |
| 13300 | } |
| 13301 | |
| 13302 | call_site |
| 13303 | = ((struct call_site *) |
| 13304 | obstack_alloc (&objfile->objfile_obstack, |
| 13305 | sizeof (*call_site) |
| 13306 | + (sizeof (*call_site->parameter) * (nparams - 1)))); |
| 13307 | *slot = call_site; |
| 13308 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); |
| 13309 | call_site->pc = pc; |
| 13310 | |
| 13311 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
| 13312 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) |
| 13313 | { |
| 13314 | struct die_info *func_die; |
| 13315 | |
| 13316 | /* Skip also over DW_TAG_inlined_subroutine. */ |
| 13317 | for (func_die = die->parent; |
| 13318 | func_die && func_die->tag != DW_TAG_subprogram |
| 13319 | && func_die->tag != DW_TAG_subroutine_type; |
| 13320 | func_die = func_die->parent); |
| 13321 | |
| 13322 | /* DW_AT_call_all_calls is a superset |
| 13323 | of DW_AT_call_all_tail_calls. */ |
| 13324 | if (func_die |
| 13325 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
| 13326 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
| 13327 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
| 13328 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
| 13329 | { |
| 13330 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is |
| 13331 | not complete. But keep CALL_SITE for look ups via call_site_htab, |
| 13332 | both the initial caller containing the real return address PC and |
| 13333 | the final callee containing the current PC of a chain of tail |
| 13334 | calls do not need to have the tail call list complete. But any |
| 13335 | function candidate for a virtual tail call frame searched via |
| 13336 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be |
| 13337 | determined unambiguously. */ |
| 13338 | } |
| 13339 | else |
| 13340 | { |
| 13341 | struct type *func_type = NULL; |
| 13342 | |
| 13343 | if (func_die) |
| 13344 | func_type = get_die_type (func_die, cu); |
| 13345 | if (func_type != NULL) |
| 13346 | { |
| 13347 | gdb_assert (func_type->code () == TYPE_CODE_FUNC); |
| 13348 | |
| 13349 | /* Enlist this call site to the function. */ |
| 13350 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); |
| 13351 | TYPE_TAIL_CALL_LIST (func_type) = call_site; |
| 13352 | } |
| 13353 | else |
| 13354 | complaint (_("Cannot find function owning DW_TAG_call_site " |
| 13355 | "DIE %s [in module %s]"), |
| 13356 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 13357 | } |
| 13358 | } |
| 13359 | |
| 13360 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
| 13361 | if (attr == NULL) |
| 13362 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); |
| 13363 | if (attr == NULL) |
| 13364 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); |
| 13365 | if (attr == NULL) |
| 13366 | { |
| 13367 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ |
| 13368 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); |
| 13369 | } |
| 13370 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
| 13371 | if (!attr || (attr->form_is_block () && DW_BLOCK (attr)->size == 0)) |
| 13372 | /* Keep NULL DWARF_BLOCK. */; |
| 13373 | else if (attr->form_is_block ()) |
| 13374 | { |
| 13375 | struct dwarf2_locexpr_baton *dlbaton; |
| 13376 | |
| 13377 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 13378 | dlbaton->data = DW_BLOCK (attr)->data; |
| 13379 | dlbaton->size = DW_BLOCK (attr)->size; |
| 13380 | dlbaton->per_cu = cu->per_cu; |
| 13381 | |
| 13382 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); |
| 13383 | } |
| 13384 | else if (attr->form_is_ref ()) |
| 13385 | { |
| 13386 | struct dwarf2_cu *target_cu = cu; |
| 13387 | struct die_info *target_die; |
| 13388 | |
| 13389 | target_die = follow_die_ref (die, attr, &target_cu); |
| 13390 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
| 13391 | if (die_is_declaration (target_die, target_cu)) |
| 13392 | { |
| 13393 | const char *target_physname; |
| 13394 | |
| 13395 | /* Prefer the mangled name; otherwise compute the demangled one. */ |
| 13396 | target_physname = dw2_linkage_name (target_die, target_cu); |
| 13397 | if (target_physname == NULL) |
| 13398 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
| 13399 | if (target_physname == NULL) |
| 13400 | complaint (_("DW_AT_call_target target DIE has invalid " |
| 13401 | "physname, for referencing DIE %s [in module %s]"), |
| 13402 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 13403 | else |
| 13404 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
| 13405 | } |
| 13406 | else |
| 13407 | { |
| 13408 | CORE_ADDR lowpc; |
| 13409 | |
| 13410 | /* DW_AT_entry_pc should be preferred. */ |
| 13411 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
| 13412 | <= PC_BOUNDS_INVALID) |
| 13413 | complaint (_("DW_AT_call_target target DIE has invalid " |
| 13414 | "low pc, for referencing DIE %s [in module %s]"), |
| 13415 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 13416 | else |
| 13417 | { |
| 13418 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 13419 | SET_FIELD_PHYSADDR (call_site->target, lowpc); |
| 13420 | } |
| 13421 | } |
| 13422 | } |
| 13423 | else |
| 13424 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
| 13425 | "block nor reference, for DIE %s [in module %s]"), |
| 13426 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 13427 | |
| 13428 | call_site->per_cu = cu->per_cu; |
| 13429 | |
| 13430 | for (child_die = die->child; |
| 13431 | child_die && child_die->tag; |
| 13432 | child_die = child_die->sibling) |
| 13433 | { |
| 13434 | struct call_site_parameter *parameter; |
| 13435 | struct attribute *loc, *origin; |
| 13436 | |
| 13437 | if (child_die->tag != DW_TAG_call_site_parameter |
| 13438 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
| 13439 | { |
| 13440 | /* Already printed the complaint above. */ |
| 13441 | continue; |
| 13442 | } |
| 13443 | |
| 13444 | gdb_assert (call_site->parameter_count < nparams); |
| 13445 | parameter = &call_site->parameter[call_site->parameter_count]; |
| 13446 | |
| 13447 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
| 13448 | specifies DW_TAG_formal_parameter. Value of the data assumed for the |
| 13449 | register is contained in DW_AT_call_value. */ |
| 13450 | |
| 13451 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
| 13452 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
| 13453 | if (origin == NULL) |
| 13454 | { |
| 13455 | /* This was a pre-DWARF-5 GNU extension alias |
| 13456 | for DW_AT_call_parameter. */ |
| 13457 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
| 13458 | } |
| 13459 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
| 13460 | { |
| 13461 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
| 13462 | |
| 13463 | sect_offset sect_off = origin->get_ref_die_offset (); |
| 13464 | if (!cu->header.offset_in_cu_p (sect_off)) |
| 13465 | { |
| 13466 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this |
| 13467 | binding can be done only inside one CU. Such referenced DIE |
| 13468 | therefore cannot be even moved to DW_TAG_partial_unit. */ |
| 13469 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
| 13470 | "DW_TAG_call_site child DIE %s [in module %s]"), |
| 13471 | sect_offset_str (child_die->sect_off), |
| 13472 | objfile_name (objfile)); |
| 13473 | continue; |
| 13474 | } |
| 13475 | parameter->u.param_cu_off |
| 13476 | = (cu_offset) (sect_off - cu->header.sect_off); |
| 13477 | } |
| 13478 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
| 13479 | { |
| 13480 | complaint (_("No DW_FORM_block* DW_AT_location for " |
| 13481 | "DW_TAG_call_site child DIE %s [in module %s]"), |
| 13482 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); |
| 13483 | continue; |
| 13484 | } |
| 13485 | else |
| 13486 | { |
| 13487 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
| 13488 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); |
| 13489 | if (parameter->u.dwarf_reg != -1) |
| 13490 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; |
| 13491 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, |
| 13492 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], |
| 13493 | ¶meter->u.fb_offset)) |
| 13494 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; |
| 13495 | else |
| 13496 | { |
| 13497 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
| 13498 | "for DW_FORM_block* DW_AT_location is supported for " |
| 13499 | "DW_TAG_call_site child DIE %s " |
| 13500 | "[in module %s]"), |
| 13501 | sect_offset_str (child_die->sect_off), |
| 13502 | objfile_name (objfile)); |
| 13503 | continue; |
| 13504 | } |
| 13505 | } |
| 13506 | |
| 13507 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
| 13508 | if (attr == NULL) |
| 13509 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); |
| 13510 | if (attr == NULL || !attr->form_is_block ()) |
| 13511 | { |
| 13512 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
| 13513 | "DW_TAG_call_site child DIE %s [in module %s]"), |
| 13514 | sect_offset_str (child_die->sect_off), |
| 13515 | objfile_name (objfile)); |
| 13516 | continue; |
| 13517 | } |
| 13518 | parameter->value = DW_BLOCK (attr)->data; |
| 13519 | parameter->value_size = DW_BLOCK (attr)->size; |
| 13520 | |
| 13521 | /* Parameters are not pre-cleared by memset above. */ |
| 13522 | parameter->data_value = NULL; |
| 13523 | parameter->data_value_size = 0; |
| 13524 | call_site->parameter_count++; |
| 13525 | |
| 13526 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
| 13527 | if (attr == NULL) |
| 13528 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); |
| 13529 | if (attr != nullptr) |
| 13530 | { |
| 13531 | if (!attr->form_is_block ()) |
| 13532 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
| 13533 | "DW_TAG_call_site child DIE %s [in module %s]"), |
| 13534 | sect_offset_str (child_die->sect_off), |
| 13535 | objfile_name (objfile)); |
| 13536 | else |
| 13537 | { |
| 13538 | parameter->data_value = DW_BLOCK (attr)->data; |
| 13539 | parameter->data_value_size = DW_BLOCK (attr)->size; |
| 13540 | } |
| 13541 | } |
| 13542 | } |
| 13543 | } |
| 13544 | |
| 13545 | /* Helper function for read_variable. If DIE represents a virtual |
| 13546 | table, then return the type of the concrete object that is |
| 13547 | associated with the virtual table. Otherwise, return NULL. */ |
| 13548 | |
| 13549 | static struct type * |
| 13550 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
| 13551 | { |
| 13552 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); |
| 13553 | if (attr == NULL) |
| 13554 | return NULL; |
| 13555 | |
| 13556 | /* Find the type DIE. */ |
| 13557 | struct die_info *type_die = NULL; |
| 13558 | struct dwarf2_cu *type_cu = cu; |
| 13559 | |
| 13560 | if (attr->form_is_ref ()) |
| 13561 | type_die = follow_die_ref (die, attr, &type_cu); |
| 13562 | if (type_die == NULL) |
| 13563 | return NULL; |
| 13564 | |
| 13565 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) |
| 13566 | return NULL; |
| 13567 | return die_containing_type (type_die, type_cu); |
| 13568 | } |
| 13569 | |
| 13570 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ |
| 13571 | |
| 13572 | static void |
| 13573 | read_variable (struct die_info *die, struct dwarf2_cu *cu) |
| 13574 | { |
| 13575 | struct rust_vtable_symbol *storage = NULL; |
| 13576 | |
| 13577 | if (cu->language == language_rust) |
| 13578 | { |
| 13579 | struct type *containing_type = rust_containing_type (die, cu); |
| 13580 | |
| 13581 | if (containing_type != NULL) |
| 13582 | { |
| 13583 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13584 | |
| 13585 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol; |
| 13586 | storage->concrete_type = containing_type; |
| 13587 | storage->subclass = SYMBOL_RUST_VTABLE; |
| 13588 | } |
| 13589 | } |
| 13590 | |
| 13591 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
| 13592 | struct attribute *abstract_origin |
| 13593 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); |
| 13594 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); |
| 13595 | if (res == NULL && loc && abstract_origin) |
| 13596 | { |
| 13597 | /* We have a variable without a name, but with a location and an abstract |
| 13598 | origin. This may be a concrete instance of an abstract variable |
| 13599 | referenced from an DW_OP_GNU_variable_value, so save it to find it back |
| 13600 | later. */ |
| 13601 | struct dwarf2_cu *origin_cu = cu; |
| 13602 | struct die_info *origin_die |
| 13603 | = follow_die_ref (die, abstract_origin, &origin_cu); |
| 13604 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; |
| 13605 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
| 13606 | } |
| 13607 | } |
| 13608 | |
| 13609 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
| 13610 | reading .debug_rnglists. |
| 13611 | Callback's type should be: |
| 13612 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 13613 | Return true if the attributes are present and valid, otherwise, |
| 13614 | return false. */ |
| 13615 | |
| 13616 | template <typename Callback> |
| 13617 | static bool |
| 13618 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, |
| 13619 | Callback &&callback) |
| 13620 | { |
| 13621 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 13622 | = cu->per_cu->dwarf2_per_objfile; |
| 13623 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 13624 | bfd *obfd = objfile->obfd; |
| 13625 | /* Base address selection entry. */ |
| 13626 | gdb::optional<CORE_ADDR> base; |
| 13627 | const gdb_byte *buffer; |
| 13628 | CORE_ADDR baseaddr; |
| 13629 | bool overflow = false; |
| 13630 | |
| 13631 | base = cu->base_address; |
| 13632 | |
| 13633 | dwarf2_per_objfile->rnglists.read (objfile); |
| 13634 | if (offset >= dwarf2_per_objfile->rnglists.size) |
| 13635 | { |
| 13636 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
| 13637 | offset); |
| 13638 | return false; |
| 13639 | } |
| 13640 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; |
| 13641 | |
| 13642 | baseaddr = objfile->text_section_offset (); |
| 13643 | |
| 13644 | while (1) |
| 13645 | { |
| 13646 | /* Initialize it due to a false compiler warning. */ |
| 13647 | CORE_ADDR range_beginning = 0, range_end = 0; |
| 13648 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
| 13649 | + dwarf2_per_objfile->rnglists.size); |
| 13650 | unsigned int bytes_read; |
| 13651 | |
| 13652 | if (buffer == buf_end) |
| 13653 | { |
| 13654 | overflow = true; |
| 13655 | break; |
| 13656 | } |
| 13657 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); |
| 13658 | switch (rlet) |
| 13659 | { |
| 13660 | case DW_RLE_end_of_list: |
| 13661 | break; |
| 13662 | case DW_RLE_base_address: |
| 13663 | if (buffer + cu->header.addr_size > buf_end) |
| 13664 | { |
| 13665 | overflow = true; |
| 13666 | break; |
| 13667 | } |
| 13668 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
| 13669 | buffer += bytes_read; |
| 13670 | break; |
| 13671 | case DW_RLE_start_length: |
| 13672 | if (buffer + cu->header.addr_size > buf_end) |
| 13673 | { |
| 13674 | overflow = true; |
| 13675 | break; |
| 13676 | } |
| 13677 | range_beginning = cu->header.read_address (obfd, buffer, |
| 13678 | &bytes_read); |
| 13679 | buffer += bytes_read; |
| 13680 | range_end = (range_beginning |
| 13681 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); |
| 13682 | buffer += bytes_read; |
| 13683 | if (buffer > buf_end) |
| 13684 | { |
| 13685 | overflow = true; |
| 13686 | break; |
| 13687 | } |
| 13688 | break; |
| 13689 | case DW_RLE_offset_pair: |
| 13690 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
| 13691 | buffer += bytes_read; |
| 13692 | if (buffer > buf_end) |
| 13693 | { |
| 13694 | overflow = true; |
| 13695 | break; |
| 13696 | } |
| 13697 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
| 13698 | buffer += bytes_read; |
| 13699 | if (buffer > buf_end) |
| 13700 | { |
| 13701 | overflow = true; |
| 13702 | break; |
| 13703 | } |
| 13704 | break; |
| 13705 | case DW_RLE_start_end: |
| 13706 | if (buffer + 2 * cu->header.addr_size > buf_end) |
| 13707 | { |
| 13708 | overflow = true; |
| 13709 | break; |
| 13710 | } |
| 13711 | range_beginning = cu->header.read_address (obfd, buffer, |
| 13712 | &bytes_read); |
| 13713 | buffer += bytes_read; |
| 13714 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
| 13715 | buffer += bytes_read; |
| 13716 | break; |
| 13717 | default: |
| 13718 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
| 13719 | return false; |
| 13720 | } |
| 13721 | if (rlet == DW_RLE_end_of_list || overflow) |
| 13722 | break; |
| 13723 | if (rlet == DW_RLE_base_address) |
| 13724 | continue; |
| 13725 | |
| 13726 | if (!base.has_value ()) |
| 13727 | { |
| 13728 | /* We have no valid base address for the ranges |
| 13729 | data. */ |
| 13730 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
| 13731 | return false; |
| 13732 | } |
| 13733 | |
| 13734 | if (range_beginning > range_end) |
| 13735 | { |
| 13736 | /* Inverted range entries are invalid. */ |
| 13737 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
| 13738 | return false; |
| 13739 | } |
| 13740 | |
| 13741 | /* Empty range entries have no effect. */ |
| 13742 | if (range_beginning == range_end) |
| 13743 | continue; |
| 13744 | |
| 13745 | range_beginning += *base; |
| 13746 | range_end += *base; |
| 13747 | |
| 13748 | /* A not-uncommon case of bad debug info. |
| 13749 | Don't pollute the addrmap with bad data. */ |
| 13750 | if (range_beginning + baseaddr == 0 |
| 13751 | && !dwarf2_per_objfile->has_section_at_zero) |
| 13752 | { |
| 13753 | complaint (_(".debug_rnglists entry has start address of zero" |
| 13754 | " [in module %s]"), objfile_name (objfile)); |
| 13755 | continue; |
| 13756 | } |
| 13757 | |
| 13758 | callback (range_beginning, range_end); |
| 13759 | } |
| 13760 | |
| 13761 | if (overflow) |
| 13762 | { |
| 13763 | complaint (_("Offset %d is not terminated " |
| 13764 | "for DW_AT_ranges attribute"), |
| 13765 | offset); |
| 13766 | return false; |
| 13767 | } |
| 13768 | |
| 13769 | return true; |
| 13770 | } |
| 13771 | |
| 13772 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. |
| 13773 | Callback's type should be: |
| 13774 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 13775 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
| 13776 | |
| 13777 | template <typename Callback> |
| 13778 | static int |
| 13779 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
| 13780 | Callback &&callback) |
| 13781 | { |
| 13782 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 13783 | = cu->per_cu->dwarf2_per_objfile; |
| 13784 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 13785 | struct comp_unit_head *cu_header = &cu->header; |
| 13786 | bfd *obfd = objfile->obfd; |
| 13787 | unsigned int addr_size = cu_header->addr_size; |
| 13788 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); |
| 13789 | /* Base address selection entry. */ |
| 13790 | gdb::optional<CORE_ADDR> base; |
| 13791 | unsigned int dummy; |
| 13792 | const gdb_byte *buffer; |
| 13793 | CORE_ADDR baseaddr; |
| 13794 | |
| 13795 | if (cu_header->version >= 5) |
| 13796 | return dwarf2_rnglists_process (offset, cu, callback); |
| 13797 | |
| 13798 | base = cu->base_address; |
| 13799 | |
| 13800 | dwarf2_per_objfile->ranges.read (objfile); |
| 13801 | if (offset >= dwarf2_per_objfile->ranges.size) |
| 13802 | { |
| 13803 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
| 13804 | offset); |
| 13805 | return 0; |
| 13806 | } |
| 13807 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
| 13808 | |
| 13809 | baseaddr = objfile->text_section_offset (); |
| 13810 | |
| 13811 | while (1) |
| 13812 | { |
| 13813 | CORE_ADDR range_beginning, range_end; |
| 13814 | |
| 13815 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
| 13816 | buffer += addr_size; |
| 13817 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
| 13818 | buffer += addr_size; |
| 13819 | offset += 2 * addr_size; |
| 13820 | |
| 13821 | /* An end of list marker is a pair of zero addresses. */ |
| 13822 | if (range_beginning == 0 && range_end == 0) |
| 13823 | /* Found the end of list entry. */ |
| 13824 | break; |
| 13825 | |
| 13826 | /* Each base address selection entry is a pair of 2 values. |
| 13827 | The first is the largest possible address, the second is |
| 13828 | the base address. Check for a base address here. */ |
| 13829 | if ((range_beginning & mask) == mask) |
| 13830 | { |
| 13831 | /* If we found the largest possible address, then we already |
| 13832 | have the base address in range_end. */ |
| 13833 | base = range_end; |
| 13834 | continue; |
| 13835 | } |
| 13836 | |
| 13837 | if (!base.has_value ()) |
| 13838 | { |
| 13839 | /* We have no valid base address for the ranges |
| 13840 | data. */ |
| 13841 | complaint (_("Invalid .debug_ranges data (no base address)")); |
| 13842 | return 0; |
| 13843 | } |
| 13844 | |
| 13845 | if (range_beginning > range_end) |
| 13846 | { |
| 13847 | /* Inverted range entries are invalid. */ |
| 13848 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
| 13849 | return 0; |
| 13850 | } |
| 13851 | |
| 13852 | /* Empty range entries have no effect. */ |
| 13853 | if (range_beginning == range_end) |
| 13854 | continue; |
| 13855 | |
| 13856 | range_beginning += *base; |
| 13857 | range_end += *base; |
| 13858 | |
| 13859 | /* A not-uncommon case of bad debug info. |
| 13860 | Don't pollute the addrmap with bad data. */ |
| 13861 | if (range_beginning + baseaddr == 0 |
| 13862 | && !dwarf2_per_objfile->has_section_at_zero) |
| 13863 | { |
| 13864 | complaint (_(".debug_ranges entry has start address of zero" |
| 13865 | " [in module %s]"), objfile_name (objfile)); |
| 13866 | continue; |
| 13867 | } |
| 13868 | |
| 13869 | callback (range_beginning, range_end); |
| 13870 | } |
| 13871 | |
| 13872 | return 1; |
| 13873 | } |
| 13874 | |
| 13875 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
| 13876 | Return 1 if the attributes are present and valid, otherwise, return 0. |
| 13877 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ |
| 13878 | |
| 13879 | static int |
| 13880 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, |
| 13881 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
| 13882 | dwarf2_psymtab *ranges_pst) |
| 13883 | { |
| 13884 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13885 | struct gdbarch *gdbarch = objfile->arch (); |
| 13886 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
| 13887 | int low_set = 0; |
| 13888 | CORE_ADDR low = 0; |
| 13889 | CORE_ADDR high = 0; |
| 13890 | int retval; |
| 13891 | |
| 13892 | retval = dwarf2_ranges_process (offset, cu, |
| 13893 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 13894 | { |
| 13895 | if (ranges_pst != NULL) |
| 13896 | { |
| 13897 | CORE_ADDR lowpc; |
| 13898 | CORE_ADDR highpc; |
| 13899 | |
| 13900 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 13901 | range_beginning + baseaddr) |
| 13902 | - baseaddr); |
| 13903 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
| 13904 | range_end + baseaddr) |
| 13905 | - baseaddr); |
| 13906 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
| 13907 | lowpc, highpc - 1, ranges_pst); |
| 13908 | } |
| 13909 | |
| 13910 | /* FIXME: This is recording everything as a low-high |
| 13911 | segment of consecutive addresses. We should have a |
| 13912 | data structure for discontiguous block ranges |
| 13913 | instead. */ |
| 13914 | if (! low_set) |
| 13915 | { |
| 13916 | low = range_beginning; |
| 13917 | high = range_end; |
| 13918 | low_set = 1; |
| 13919 | } |
| 13920 | else |
| 13921 | { |
| 13922 | if (range_beginning < low) |
| 13923 | low = range_beginning; |
| 13924 | if (range_end > high) |
| 13925 | high = range_end; |
| 13926 | } |
| 13927 | }); |
| 13928 | if (!retval) |
| 13929 | return 0; |
| 13930 | |
| 13931 | if (! low_set) |
| 13932 | /* If the first entry is an end-of-list marker, the range |
| 13933 | describes an empty scope, i.e. no instructions. */ |
| 13934 | return 0; |
| 13935 | |
| 13936 | if (low_return) |
| 13937 | *low_return = low; |
| 13938 | if (high_return) |
| 13939 | *high_return = high; |
| 13940 | return 1; |
| 13941 | } |
| 13942 | |
| 13943 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
| 13944 | definition for the return value. *LOWPC and *HIGHPC are set iff |
| 13945 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
| 13946 | |
| 13947 | static enum pc_bounds_kind |
| 13948 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
| 13949 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
| 13950 | dwarf2_psymtab *pst) |
| 13951 | { |
| 13952 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 13953 | = cu->per_cu->dwarf2_per_objfile; |
| 13954 | struct attribute *attr; |
| 13955 | struct attribute *attr_high; |
| 13956 | CORE_ADDR low = 0; |
| 13957 | CORE_ADDR high = 0; |
| 13958 | enum pc_bounds_kind ret; |
| 13959 | |
| 13960 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
| 13961 | if (attr_high) |
| 13962 | { |
| 13963 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 13964 | if (attr != nullptr) |
| 13965 | { |
| 13966 | low = attr->value_as_address (); |
| 13967 | high = attr_high->value_as_address (); |
| 13968 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
| 13969 | high += low; |
| 13970 | } |
| 13971 | else |
| 13972 | /* Found high w/o low attribute. */ |
| 13973 | return PC_BOUNDS_INVALID; |
| 13974 | |
| 13975 | /* Found consecutive range of addresses. */ |
| 13976 | ret = PC_BOUNDS_HIGH_LOW; |
| 13977 | } |
| 13978 | else |
| 13979 | { |
| 13980 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
| 13981 | if (attr != NULL) |
| 13982 | { |
| 13983 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
| 13984 | We take advantage of the fact that DW_AT_ranges does not appear |
| 13985 | in DW_TAG_compile_unit of DWO files. */ |
| 13986 | int need_ranges_base = die->tag != DW_TAG_compile_unit; |
| 13987 | unsigned int ranges_offset = (DW_UNSND (attr) |
| 13988 | + (need_ranges_base |
| 13989 | ? cu->ranges_base |
| 13990 | : 0)); |
| 13991 | |
| 13992 | /* Value of the DW_AT_ranges attribute is the offset in the |
| 13993 | .debug_ranges section. */ |
| 13994 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
| 13995 | return PC_BOUNDS_INVALID; |
| 13996 | /* Found discontinuous range of addresses. */ |
| 13997 | ret = PC_BOUNDS_RANGES; |
| 13998 | } |
| 13999 | else |
| 14000 | return PC_BOUNDS_NOT_PRESENT; |
| 14001 | } |
| 14002 | |
| 14003 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
| 14004 | if (high <= low) |
| 14005 | return PC_BOUNDS_INVALID; |
| 14006 | |
| 14007 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 14008 | eliminate duplicate copies of functions and vtables and such. |
| 14009 | The linker will arbitrarily choose one and discard the others. |
| 14010 | The AT_*_pc values for such functions refer to local labels in |
| 14011 | these sections. If the section from that file was discarded, the |
| 14012 | labels are not in the output, so the relocs get a value of 0. |
| 14013 | If this is a discarded function, mark the pc bounds as invalid, |
| 14014 | so that GDB will ignore it. */ |
| 14015 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 14016 | return PC_BOUNDS_INVALID; |
| 14017 | |
| 14018 | *lowpc = low; |
| 14019 | if (highpc) |
| 14020 | *highpc = high; |
| 14021 | return ret; |
| 14022 | } |
| 14023 | |
| 14024 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
| 14025 | its low and high PC addresses. Do nothing if these addresses could not |
| 14026 | be determined. Otherwise, set LOWPC to the low address if it is smaller, |
| 14027 | and HIGHPC to the high address if greater than HIGHPC. */ |
| 14028 | |
| 14029 | static void |
| 14030 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, |
| 14031 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 14032 | struct dwarf2_cu *cu) |
| 14033 | { |
| 14034 | CORE_ADDR low, high; |
| 14035 | struct die_info *child = die->child; |
| 14036 | |
| 14037 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
| 14038 | { |
| 14039 | *lowpc = std::min (*lowpc, low); |
| 14040 | *highpc = std::max (*highpc, high); |
| 14041 | } |
| 14042 | |
| 14043 | /* If the language does not allow nested subprograms (either inside |
| 14044 | subprograms or lexical blocks), we're done. */ |
| 14045 | if (cu->language != language_ada) |
| 14046 | return; |
| 14047 | |
| 14048 | /* Check all the children of the given DIE. If it contains nested |
| 14049 | subprograms, then check their pc bounds. Likewise, we need to |
| 14050 | check lexical blocks as well, as they may also contain subprogram |
| 14051 | definitions. */ |
| 14052 | while (child && child->tag) |
| 14053 | { |
| 14054 | if (child->tag == DW_TAG_subprogram |
| 14055 | || child->tag == DW_TAG_lexical_block) |
| 14056 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); |
| 14057 | child = child->sibling; |
| 14058 | } |
| 14059 | } |
| 14060 | |
| 14061 | /* Get the low and high pc's represented by the scope DIE, and store |
| 14062 | them in *LOWPC and *HIGHPC. If the correct values can't be |
| 14063 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ |
| 14064 | |
| 14065 | static void |
| 14066 | get_scope_pc_bounds (struct die_info *die, |
| 14067 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 14068 | struct dwarf2_cu *cu) |
| 14069 | { |
| 14070 | CORE_ADDR best_low = (CORE_ADDR) -1; |
| 14071 | CORE_ADDR best_high = (CORE_ADDR) 0; |
| 14072 | CORE_ADDR current_low, current_high; |
| 14073 | |
| 14074 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
| 14075 | >= PC_BOUNDS_RANGES) |
| 14076 | { |
| 14077 | best_low = current_low; |
| 14078 | best_high = current_high; |
| 14079 | } |
| 14080 | else |
| 14081 | { |
| 14082 | struct die_info *child = die->child; |
| 14083 | |
| 14084 | while (child && child->tag) |
| 14085 | { |
| 14086 | switch (child->tag) { |
| 14087 | case DW_TAG_subprogram: |
| 14088 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
| 14089 | break; |
| 14090 | case DW_TAG_namespace: |
| 14091 | case DW_TAG_module: |
| 14092 | /* FIXME: carlton/2004-01-16: Should we do this for |
| 14093 | DW_TAG_class_type/DW_TAG_structure_type, too? I think |
| 14094 | that current GCC's always emit the DIEs corresponding |
| 14095 | to definitions of methods of classes as children of a |
| 14096 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to |
| 14097 | the DIEs giving the declarations, which could be |
| 14098 | anywhere). But I don't see any reason why the |
| 14099 | standards says that they have to be there. */ |
| 14100 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); |
| 14101 | |
| 14102 | if (current_low != ((CORE_ADDR) -1)) |
| 14103 | { |
| 14104 | best_low = std::min (best_low, current_low); |
| 14105 | best_high = std::max (best_high, current_high); |
| 14106 | } |
| 14107 | break; |
| 14108 | default: |
| 14109 | /* Ignore. */ |
| 14110 | break; |
| 14111 | } |
| 14112 | |
| 14113 | child = child->sibling; |
| 14114 | } |
| 14115 | } |
| 14116 | |
| 14117 | *lowpc = best_low; |
| 14118 | *highpc = best_high; |
| 14119 | } |
| 14120 | |
| 14121 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
| 14122 | in DIE. */ |
| 14123 | |
| 14124 | static void |
| 14125 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, |
| 14126 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) |
| 14127 | { |
| 14128 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14129 | struct gdbarch *gdbarch = objfile->arch (); |
| 14130 | struct attribute *attr; |
| 14131 | struct attribute *attr_high; |
| 14132 | |
| 14133 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
| 14134 | if (attr_high) |
| 14135 | { |
| 14136 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 14137 | if (attr != nullptr) |
| 14138 | { |
| 14139 | CORE_ADDR low = attr->value_as_address (); |
| 14140 | CORE_ADDR high = attr_high->value_as_address (); |
| 14141 | |
| 14142 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
| 14143 | high += low; |
| 14144 | |
| 14145 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
| 14146 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); |
| 14147 | cu->get_builder ()->record_block_range (block, low, high - 1); |
| 14148 | } |
| 14149 | } |
| 14150 | |
| 14151 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
| 14152 | if (attr != nullptr) |
| 14153 | { |
| 14154 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
| 14155 | We take advantage of the fact that DW_AT_ranges does not appear |
| 14156 | in DW_TAG_compile_unit of DWO files. */ |
| 14157 | int need_ranges_base = die->tag != DW_TAG_compile_unit; |
| 14158 | |
| 14159 | /* The value of the DW_AT_ranges attribute is the offset of the |
| 14160 | address range list in the .debug_ranges section. */ |
| 14161 | unsigned long offset = (DW_UNSND (attr) |
| 14162 | + (need_ranges_base ? cu->ranges_base : 0)); |
| 14163 | |
| 14164 | std::vector<blockrange> blockvec; |
| 14165 | dwarf2_ranges_process (offset, cu, |
| 14166 | [&] (CORE_ADDR start, CORE_ADDR end) |
| 14167 | { |
| 14168 | start += baseaddr; |
| 14169 | end += baseaddr; |
| 14170 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
| 14171 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); |
| 14172 | cu->get_builder ()->record_block_range (block, start, end - 1); |
| 14173 | blockvec.emplace_back (start, end); |
| 14174 | }); |
| 14175 | |
| 14176 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); |
| 14177 | } |
| 14178 | } |
| 14179 | |
| 14180 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
| 14181 | Intel C/C++ compiler, and cache the result in CU. */ |
| 14182 | |
| 14183 | static void |
| 14184 | check_producer (struct dwarf2_cu *cu) |
| 14185 | { |
| 14186 | int major, minor; |
| 14187 | |
| 14188 | if (cu->producer == NULL) |
| 14189 | { |
| 14190 | /* For unknown compilers expect their behavior is DWARF version |
| 14191 | compliant. |
| 14192 | |
| 14193 | GCC started to support .debug_types sections by -gdwarf-4 since |
| 14194 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer |
| 14195 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 |
| 14196 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility |
| 14197 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ |
| 14198 | } |
| 14199 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
| 14200 | { |
| 14201 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
| 14202 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); |
| 14203 | } |
| 14204 | else if (producer_is_icc (cu->producer, &major, &minor)) |
| 14205 | { |
| 14206 | cu->producer_is_icc = true; |
| 14207 | cu->producer_is_icc_lt_14 = major < 14; |
| 14208 | } |
| 14209 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
| 14210 | cu->producer_is_codewarrior = true; |
| 14211 | else |
| 14212 | { |
| 14213 | /* For other non-GCC compilers, expect their behavior is DWARF version |
| 14214 | compliant. */ |
| 14215 | } |
| 14216 | |
| 14217 | cu->checked_producer = true; |
| 14218 | } |
| 14219 | |
| 14220 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
| 14221 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed |
| 14222 | during 4.6.0 experimental. */ |
| 14223 | |
| 14224 | static bool |
| 14225 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
| 14226 | { |
| 14227 | if (!cu->checked_producer) |
| 14228 | check_producer (cu); |
| 14229 | |
| 14230 | return cu->producer_is_gxx_lt_4_6; |
| 14231 | } |
| 14232 | |
| 14233 | |
| 14234 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information |
| 14235 | with incorrect is_stmt attributes. */ |
| 14236 | |
| 14237 | static bool |
| 14238 | producer_is_codewarrior (struct dwarf2_cu *cu) |
| 14239 | { |
| 14240 | if (!cu->checked_producer) |
| 14241 | check_producer (cu); |
| 14242 | |
| 14243 | return cu->producer_is_codewarrior; |
| 14244 | } |
| 14245 | |
| 14246 | /* Return the default accessibility type if it is not overridden by |
| 14247 | DW_AT_accessibility. */ |
| 14248 | |
| 14249 | static enum dwarf_access_attribute |
| 14250 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) |
| 14251 | { |
| 14252 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) |
| 14253 | { |
| 14254 | /* The default DWARF 2 accessibility for members is public, the default |
| 14255 | accessibility for inheritance is private. */ |
| 14256 | |
| 14257 | if (die->tag != DW_TAG_inheritance) |
| 14258 | return DW_ACCESS_public; |
| 14259 | else |
| 14260 | return DW_ACCESS_private; |
| 14261 | } |
| 14262 | else |
| 14263 | { |
| 14264 | /* DWARF 3+ defines the default accessibility a different way. The same |
| 14265 | rules apply now for DW_TAG_inheritance as for the members and it only |
| 14266 | depends on the container kind. */ |
| 14267 | |
| 14268 | if (die->parent->tag == DW_TAG_class_type) |
| 14269 | return DW_ACCESS_private; |
| 14270 | else |
| 14271 | return DW_ACCESS_public; |
| 14272 | } |
| 14273 | } |
| 14274 | |
| 14275 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
| 14276 | offset. If the attribute was not found return 0, otherwise return |
| 14277 | 1. If it was found but could not properly be handled, set *OFFSET |
| 14278 | to 0. */ |
| 14279 | |
| 14280 | static int |
| 14281 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, |
| 14282 | LONGEST *offset) |
| 14283 | { |
| 14284 | struct attribute *attr; |
| 14285 | |
| 14286 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
| 14287 | if (attr != NULL) |
| 14288 | { |
| 14289 | *offset = 0; |
| 14290 | |
| 14291 | /* Note that we do not check for a section offset first here. |
| 14292 | This is because DW_AT_data_member_location is new in DWARF 4, |
| 14293 | so if we see it, we can assume that a constant form is really |
| 14294 | a constant and not a section offset. */ |
| 14295 | if (attr->form_is_constant ()) |
| 14296 | *offset = attr->constant_value (0); |
| 14297 | else if (attr->form_is_section_offset ()) |
| 14298 | dwarf2_complex_location_expr_complaint (); |
| 14299 | else if (attr->form_is_block ()) |
| 14300 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
| 14301 | else |
| 14302 | dwarf2_complex_location_expr_complaint (); |
| 14303 | |
| 14304 | return 1; |
| 14305 | } |
| 14306 | |
| 14307 | return 0; |
| 14308 | } |
| 14309 | |
| 14310 | /* Look for DW_AT_data_member_location and store the results in FIELD. */ |
| 14311 | |
| 14312 | static void |
| 14313 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, |
| 14314 | struct field *field) |
| 14315 | { |
| 14316 | struct attribute *attr; |
| 14317 | |
| 14318 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
| 14319 | if (attr != NULL) |
| 14320 | { |
| 14321 | if (attr->form_is_constant ()) |
| 14322 | { |
| 14323 | LONGEST offset = attr->constant_value (0); |
| 14324 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); |
| 14325 | } |
| 14326 | else if (attr->form_is_section_offset ()) |
| 14327 | dwarf2_complex_location_expr_complaint (); |
| 14328 | else if (attr->form_is_block ()) |
| 14329 | { |
| 14330 | bool handled; |
| 14331 | CORE_ADDR offset = decode_locdesc (DW_BLOCK (attr), cu, &handled); |
| 14332 | if (handled) |
| 14333 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); |
| 14334 | else |
| 14335 | { |
| 14336 | struct objfile *objfile |
| 14337 | = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14338 | struct dwarf2_locexpr_baton *dlbaton |
| 14339 | = XOBNEW (&objfile->objfile_obstack, |
| 14340 | struct dwarf2_locexpr_baton); |
| 14341 | dlbaton->data = DW_BLOCK (attr)->data; |
| 14342 | dlbaton->size = DW_BLOCK (attr)->size; |
| 14343 | /* When using this baton, we want to compute the address |
| 14344 | of the field, not the value. This is why |
| 14345 | is_reference is set to false here. */ |
| 14346 | dlbaton->is_reference = false; |
| 14347 | dlbaton->per_cu = cu->per_cu; |
| 14348 | |
| 14349 | SET_FIELD_DWARF_BLOCK (*field, dlbaton); |
| 14350 | } |
| 14351 | } |
| 14352 | else |
| 14353 | dwarf2_complex_location_expr_complaint (); |
| 14354 | } |
| 14355 | } |
| 14356 | |
| 14357 | /* Add an aggregate field to the field list. */ |
| 14358 | |
| 14359 | static void |
| 14360 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
| 14361 | struct dwarf2_cu *cu) |
| 14362 | { |
| 14363 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14364 | struct gdbarch *gdbarch = objfile->arch (); |
| 14365 | struct nextfield *new_field; |
| 14366 | struct attribute *attr; |
| 14367 | struct field *fp; |
| 14368 | const char *fieldname = ""; |
| 14369 | |
| 14370 | if (die->tag == DW_TAG_inheritance) |
| 14371 | { |
| 14372 | fip->baseclasses.emplace_back (); |
| 14373 | new_field = &fip->baseclasses.back (); |
| 14374 | } |
| 14375 | else |
| 14376 | { |
| 14377 | fip->fields.emplace_back (); |
| 14378 | new_field = &fip->fields.back (); |
| 14379 | } |
| 14380 | |
| 14381 | new_field->offset = die->sect_off; |
| 14382 | |
| 14383 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 14384 | if (attr != nullptr) |
| 14385 | new_field->accessibility = DW_UNSND (attr); |
| 14386 | else |
| 14387 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); |
| 14388 | if (new_field->accessibility != DW_ACCESS_public) |
| 14389 | fip->non_public_fields = 1; |
| 14390 | |
| 14391 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
| 14392 | if (attr != nullptr) |
| 14393 | new_field->virtuality = DW_UNSND (attr); |
| 14394 | else |
| 14395 | new_field->virtuality = DW_VIRTUALITY_none; |
| 14396 | |
| 14397 | fp = &new_field->field; |
| 14398 | |
| 14399 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
| 14400 | { |
| 14401 | /* Data member other than a C++ static data member. */ |
| 14402 | |
| 14403 | /* Get type of field. */ |
| 14404 | fp->type = die_type (die, cu); |
| 14405 | |
| 14406 | SET_FIELD_BITPOS (*fp, 0); |
| 14407 | |
| 14408 | /* Get bit size of field (zero if none). */ |
| 14409 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
| 14410 | if (attr != nullptr) |
| 14411 | { |
| 14412 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); |
| 14413 | } |
| 14414 | else |
| 14415 | { |
| 14416 | FIELD_BITSIZE (*fp) = 0; |
| 14417 | } |
| 14418 | |
| 14419 | /* Get bit offset of field. */ |
| 14420 | handle_data_member_location (die, cu, fp); |
| 14421 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
| 14422 | if (attr != nullptr) |
| 14423 | { |
| 14424 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
| 14425 | { |
| 14426 | /* For big endian bits, the DW_AT_bit_offset gives the |
| 14427 | additional bit offset from the MSB of the containing |
| 14428 | anonymous object to the MSB of the field. We don't |
| 14429 | have to do anything special since we don't need to |
| 14430 | know the size of the anonymous object. */ |
| 14431 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
| 14432 | } |
| 14433 | else |
| 14434 | { |
| 14435 | /* For little endian bits, compute the bit offset to the |
| 14436 | MSB of the anonymous object, subtract off the number of |
| 14437 | bits from the MSB of the field to the MSB of the |
| 14438 | object, and then subtract off the number of bits of |
| 14439 | the field itself. The result is the bit offset of |
| 14440 | the LSB of the field. */ |
| 14441 | int anonymous_size; |
| 14442 | int bit_offset = DW_UNSND (attr); |
| 14443 | |
| 14444 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 14445 | if (attr != nullptr) |
| 14446 | { |
| 14447 | /* The size of the anonymous object containing |
| 14448 | the bit field is explicit, so use the |
| 14449 | indicated size (in bytes). */ |
| 14450 | anonymous_size = DW_UNSND (attr); |
| 14451 | } |
| 14452 | else |
| 14453 | { |
| 14454 | /* The size of the anonymous object containing |
| 14455 | the bit field must be inferred from the type |
| 14456 | attribute of the data member containing the |
| 14457 | bit field. */ |
| 14458 | anonymous_size = TYPE_LENGTH (fp->type); |
| 14459 | } |
| 14460 | SET_FIELD_BITPOS (*fp, |
| 14461 | (FIELD_BITPOS (*fp) |
| 14462 | + anonymous_size * bits_per_byte |
| 14463 | - bit_offset - FIELD_BITSIZE (*fp))); |
| 14464 | } |
| 14465 | } |
| 14466 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
| 14467 | if (attr != NULL) |
| 14468 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) |
| 14469 | + attr->constant_value (0))); |
| 14470 | |
| 14471 | /* Get name of field. */ |
| 14472 | fieldname = dwarf2_name (die, cu); |
| 14473 | if (fieldname == NULL) |
| 14474 | fieldname = ""; |
| 14475 | |
| 14476 | /* The name is already allocated along with this objfile, so we don't |
| 14477 | need to duplicate it for the type. */ |
| 14478 | fp->name = fieldname; |
| 14479 | |
| 14480 | /* Change accessibility for artificial fields (e.g. virtual table |
| 14481 | pointer or virtual base class pointer) to private. */ |
| 14482 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
| 14483 | { |
| 14484 | FIELD_ARTIFICIAL (*fp) = 1; |
| 14485 | new_field->accessibility = DW_ACCESS_private; |
| 14486 | fip->non_public_fields = 1; |
| 14487 | } |
| 14488 | } |
| 14489 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
| 14490 | { |
| 14491 | /* C++ static member. */ |
| 14492 | |
| 14493 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that |
| 14494 | is a declaration, but all versions of G++ as of this writing |
| 14495 | (so through at least 3.2.1) incorrectly generate |
| 14496 | DW_TAG_variable tags. */ |
| 14497 | |
| 14498 | const char *physname; |
| 14499 | |
| 14500 | /* Get name of field. */ |
| 14501 | fieldname = dwarf2_name (die, cu); |
| 14502 | if (fieldname == NULL) |
| 14503 | return; |
| 14504 | |
| 14505 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 14506 | if (attr |
| 14507 | /* Only create a symbol if this is an external value. |
| 14508 | new_symbol checks this and puts the value in the global symbol |
| 14509 | table, which we want. If it is not external, new_symbol |
| 14510 | will try to put the value in cu->list_in_scope which is wrong. */ |
| 14511 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) |
| 14512 | { |
| 14513 | /* A static const member, not much different than an enum as far as |
| 14514 | we're concerned, except that we can support more types. */ |
| 14515 | new_symbol (die, NULL, cu); |
| 14516 | } |
| 14517 | |
| 14518 | /* Get physical name. */ |
| 14519 | physname = dwarf2_physname (fieldname, die, cu); |
| 14520 | |
| 14521 | /* The name is already allocated along with this objfile, so we don't |
| 14522 | need to duplicate it for the type. */ |
| 14523 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); |
| 14524 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 14525 | FIELD_NAME (*fp) = fieldname; |
| 14526 | } |
| 14527 | else if (die->tag == DW_TAG_inheritance) |
| 14528 | { |
| 14529 | /* C++ base class field. */ |
| 14530 | handle_data_member_location (die, cu, fp); |
| 14531 | FIELD_BITSIZE (*fp) = 0; |
| 14532 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 14533 | FIELD_NAME (*fp) = fp->type->name (); |
| 14534 | } |
| 14535 | else |
| 14536 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); |
| 14537 | } |
| 14538 | |
| 14539 | /* Can the type given by DIE define another type? */ |
| 14540 | |
| 14541 | static bool |
| 14542 | type_can_define_types (const struct die_info *die) |
| 14543 | { |
| 14544 | switch (die->tag) |
| 14545 | { |
| 14546 | case DW_TAG_typedef: |
| 14547 | case DW_TAG_class_type: |
| 14548 | case DW_TAG_structure_type: |
| 14549 | case DW_TAG_union_type: |
| 14550 | case DW_TAG_enumeration_type: |
| 14551 | return true; |
| 14552 | |
| 14553 | default: |
| 14554 | return false; |
| 14555 | } |
| 14556 | } |
| 14557 | |
| 14558 | /* Add a type definition defined in the scope of the FIP's class. */ |
| 14559 | |
| 14560 | static void |
| 14561 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
| 14562 | struct dwarf2_cu *cu) |
| 14563 | { |
| 14564 | struct decl_field fp; |
| 14565 | memset (&fp, 0, sizeof (fp)); |
| 14566 | |
| 14567 | gdb_assert (type_can_define_types (die)); |
| 14568 | |
| 14569 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
| 14570 | fp.name = dwarf2_name (die, cu); |
| 14571 | fp.type = read_type_die (die, cu); |
| 14572 | |
| 14573 | /* Save accessibility. */ |
| 14574 | enum dwarf_access_attribute accessibility; |
| 14575 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 14576 | if (attr != NULL) |
| 14577 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
| 14578 | else |
| 14579 | accessibility = dwarf2_default_access_attribute (die, cu); |
| 14580 | switch (accessibility) |
| 14581 | { |
| 14582 | case DW_ACCESS_public: |
| 14583 | /* The assumed value if neither private nor protected. */ |
| 14584 | break; |
| 14585 | case DW_ACCESS_private: |
| 14586 | fp.is_private = 1; |
| 14587 | break; |
| 14588 | case DW_ACCESS_protected: |
| 14589 | fp.is_protected = 1; |
| 14590 | break; |
| 14591 | default: |
| 14592 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
| 14593 | } |
| 14594 | |
| 14595 | if (die->tag == DW_TAG_typedef) |
| 14596 | fip->typedef_field_list.push_back (fp); |
| 14597 | else |
| 14598 | fip->nested_types_list.push_back (fp); |
| 14599 | } |
| 14600 | |
| 14601 | /* A convenience typedef that's used when finding the discriminant |
| 14602 | field for a variant part. */ |
| 14603 | typedef std::unordered_map<sect_offset, int, gdb::hash_enum<sect_offset>> |
| 14604 | offset_map_type; |
| 14605 | |
| 14606 | /* Compute the discriminant range for a given variant. OBSTACK is |
| 14607 | where the results will be stored. VARIANT is the variant to |
| 14608 | process. IS_UNSIGNED indicates whether the discriminant is signed |
| 14609 | or unsigned. */ |
| 14610 | |
| 14611 | static const gdb::array_view<discriminant_range> |
| 14612 | convert_variant_range (struct obstack *obstack, const variant_field &variant, |
| 14613 | bool is_unsigned) |
| 14614 | { |
| 14615 | std::vector<discriminant_range> ranges; |
| 14616 | |
| 14617 | if (variant.default_branch) |
| 14618 | return {}; |
| 14619 | |
| 14620 | if (variant.discr_list_data == nullptr) |
| 14621 | { |
| 14622 | discriminant_range r |
| 14623 | = {variant.discriminant_value, variant.discriminant_value}; |
| 14624 | ranges.push_back (r); |
| 14625 | } |
| 14626 | else |
| 14627 | { |
| 14628 | gdb::array_view<const gdb_byte> data (variant.discr_list_data->data, |
| 14629 | variant.discr_list_data->size); |
| 14630 | while (!data.empty ()) |
| 14631 | { |
| 14632 | if (data[0] != DW_DSC_range && data[0] != DW_DSC_label) |
| 14633 | { |
| 14634 | complaint (_("invalid discriminant marker: %d"), data[0]); |
| 14635 | break; |
| 14636 | } |
| 14637 | bool is_range = data[0] == DW_DSC_range; |
| 14638 | data = data.slice (1); |
| 14639 | |
| 14640 | ULONGEST low, high; |
| 14641 | unsigned int bytes_read; |
| 14642 | |
| 14643 | if (data.empty ()) |
| 14644 | { |
| 14645 | complaint (_("DW_AT_discr_list missing low value")); |
| 14646 | break; |
| 14647 | } |
| 14648 | if (is_unsigned) |
| 14649 | low = read_unsigned_leb128 (nullptr, data.data (), &bytes_read); |
| 14650 | else |
| 14651 | low = (ULONGEST) read_signed_leb128 (nullptr, data.data (), |
| 14652 | &bytes_read); |
| 14653 | data = data.slice (bytes_read); |
| 14654 | |
| 14655 | if (is_range) |
| 14656 | { |
| 14657 | if (data.empty ()) |
| 14658 | { |
| 14659 | complaint (_("DW_AT_discr_list missing high value")); |
| 14660 | break; |
| 14661 | } |
| 14662 | if (is_unsigned) |
| 14663 | high = read_unsigned_leb128 (nullptr, data.data (), |
| 14664 | &bytes_read); |
| 14665 | else |
| 14666 | high = (LONGEST) read_signed_leb128 (nullptr, data.data (), |
| 14667 | &bytes_read); |
| 14668 | data = data.slice (bytes_read); |
| 14669 | } |
| 14670 | else |
| 14671 | high = low; |
| 14672 | |
| 14673 | ranges.push_back ({ low, high }); |
| 14674 | } |
| 14675 | } |
| 14676 | |
| 14677 | discriminant_range *result = XOBNEWVEC (obstack, discriminant_range, |
| 14678 | ranges.size ()); |
| 14679 | std::copy (ranges.begin (), ranges.end (), result); |
| 14680 | return gdb::array_view<discriminant_range> (result, ranges.size ()); |
| 14681 | } |
| 14682 | |
| 14683 | static const gdb::array_view<variant_part> create_variant_parts |
| 14684 | (struct obstack *obstack, |
| 14685 | const offset_map_type &offset_map, |
| 14686 | struct field_info *fi, |
| 14687 | const std::vector<variant_part_builder> &variant_parts); |
| 14688 | |
| 14689 | /* Fill in a "struct variant" for a given variant field. RESULT is |
| 14690 | the variant to fill in. OBSTACK is where any needed allocations |
| 14691 | will be done. OFFSET_MAP holds the mapping from section offsets to |
| 14692 | fields for the type. FI describes the fields of the type we're |
| 14693 | processing. FIELD is the variant field we're converting. */ |
| 14694 | |
| 14695 | static void |
| 14696 | create_one_variant (variant &result, struct obstack *obstack, |
| 14697 | const offset_map_type &offset_map, |
| 14698 | struct field_info *fi, const variant_field &field) |
| 14699 | { |
| 14700 | result.discriminants = convert_variant_range (obstack, field, false); |
| 14701 | result.first_field = field.first_field + fi->baseclasses.size (); |
| 14702 | result.last_field = field.last_field + fi->baseclasses.size (); |
| 14703 | result.parts = create_variant_parts (obstack, offset_map, fi, |
| 14704 | field.variant_parts); |
| 14705 | } |
| 14706 | |
| 14707 | /* Fill in a "struct variant_part" for a given variant part. RESULT |
| 14708 | is the variant part to fill in. OBSTACK is where any needed |
| 14709 | allocations will be done. OFFSET_MAP holds the mapping from |
| 14710 | section offsets to fields for the type. FI describes the fields of |
| 14711 | the type we're processing. BUILDER is the variant part to be |
| 14712 | converted. */ |
| 14713 | |
| 14714 | static void |
| 14715 | create_one_variant_part (variant_part &result, |
| 14716 | struct obstack *obstack, |
| 14717 | const offset_map_type &offset_map, |
| 14718 | struct field_info *fi, |
| 14719 | const variant_part_builder &builder) |
| 14720 | { |
| 14721 | auto iter = offset_map.find (builder.discriminant_offset); |
| 14722 | if (iter == offset_map.end ()) |
| 14723 | { |
| 14724 | result.discriminant_index = -1; |
| 14725 | /* Doesn't matter. */ |
| 14726 | result.is_unsigned = false; |
| 14727 | } |
| 14728 | else |
| 14729 | { |
| 14730 | result.discriminant_index = iter->second; |
| 14731 | result.is_unsigned |
| 14732 | = TYPE_UNSIGNED (FIELD_TYPE |
| 14733 | (fi->fields[result.discriminant_index].field)); |
| 14734 | } |
| 14735 | |
| 14736 | size_t n = builder.variants.size (); |
| 14737 | variant *output = new (obstack) variant[n]; |
| 14738 | for (size_t i = 0; i < n; ++i) |
| 14739 | create_one_variant (output[i], obstack, offset_map, fi, |
| 14740 | builder.variants[i]); |
| 14741 | |
| 14742 | result.variants = gdb::array_view<variant> (output, n); |
| 14743 | } |
| 14744 | |
| 14745 | /* Create a vector of variant parts that can be attached to a type. |
| 14746 | OBSTACK is where any needed allocations will be done. OFFSET_MAP |
| 14747 | holds the mapping from section offsets to fields for the type. FI |
| 14748 | describes the fields of the type we're processing. VARIANT_PARTS |
| 14749 | is the vector to convert. */ |
| 14750 | |
| 14751 | static const gdb::array_view<variant_part> |
| 14752 | create_variant_parts (struct obstack *obstack, |
| 14753 | const offset_map_type &offset_map, |
| 14754 | struct field_info *fi, |
| 14755 | const std::vector<variant_part_builder> &variant_parts) |
| 14756 | { |
| 14757 | if (variant_parts.empty ()) |
| 14758 | return {}; |
| 14759 | |
| 14760 | size_t n = variant_parts.size (); |
| 14761 | variant_part *result = new (obstack) variant_part[n]; |
| 14762 | for (size_t i = 0; i < n; ++i) |
| 14763 | create_one_variant_part (result[i], obstack, offset_map, fi, |
| 14764 | variant_parts[i]); |
| 14765 | |
| 14766 | return gdb::array_view<variant_part> (result, n); |
| 14767 | } |
| 14768 | |
| 14769 | /* Compute the variant part vector for FIP, attaching it to TYPE when |
| 14770 | done. */ |
| 14771 | |
| 14772 | static void |
| 14773 | add_variant_property (struct field_info *fip, struct type *type, |
| 14774 | struct dwarf2_cu *cu) |
| 14775 | { |
| 14776 | /* Map section offsets of fields to their field index. Note the |
| 14777 | field index here does not take the number of baseclasses into |
| 14778 | account. */ |
| 14779 | offset_map_type offset_map; |
| 14780 | for (int i = 0; i < fip->fields.size (); ++i) |
| 14781 | offset_map[fip->fields[i].offset] = i; |
| 14782 | |
| 14783 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14784 | gdb::array_view<variant_part> parts |
| 14785 | = create_variant_parts (&objfile->objfile_obstack, offset_map, fip, |
| 14786 | fip->variant_parts); |
| 14787 | |
| 14788 | struct dynamic_prop prop; |
| 14789 | prop.kind = PROP_VARIANT_PARTS; |
| 14790 | prop.data.variant_parts |
| 14791 | = ((gdb::array_view<variant_part> *) |
| 14792 | obstack_copy (&objfile->objfile_obstack, &parts, sizeof (parts))); |
| 14793 | |
| 14794 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
| 14795 | } |
| 14796 | |
| 14797 | /* Create the vector of fields, and attach it to the type. */ |
| 14798 | |
| 14799 | static void |
| 14800 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
| 14801 | struct dwarf2_cu *cu) |
| 14802 | { |
| 14803 | int nfields = fip->nfields (); |
| 14804 | |
| 14805 | /* Record the field count, allocate space for the array of fields, |
| 14806 | and create blank accessibility bitfields if necessary. */ |
| 14807 | type->set_num_fields (nfields); |
| 14808 | type->set_fields |
| 14809 | ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * nfields)); |
| 14810 | |
| 14811 | if (fip->non_public_fields && cu->language != language_ada) |
| 14812 | { |
| 14813 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 14814 | |
| 14815 | TYPE_FIELD_PRIVATE_BITS (type) = |
| 14816 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 14817 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); |
| 14818 | |
| 14819 | TYPE_FIELD_PROTECTED_BITS (type) = |
| 14820 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 14821 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); |
| 14822 | |
| 14823 | TYPE_FIELD_IGNORE_BITS (type) = |
| 14824 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 14825 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); |
| 14826 | } |
| 14827 | |
| 14828 | /* If the type has baseclasses, allocate and clear a bit vector for |
| 14829 | TYPE_FIELD_VIRTUAL_BITS. */ |
| 14830 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
| 14831 | { |
| 14832 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
| 14833 | unsigned char *pointer; |
| 14834 | |
| 14835 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 14836 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
| 14837 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
| 14838 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
| 14839 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); |
| 14840 | } |
| 14841 | |
| 14842 | if (!fip->variant_parts.empty ()) |
| 14843 | add_variant_property (fip, type, cu); |
| 14844 | |
| 14845 | /* Copy the saved-up fields into the field vector. */ |
| 14846 | for (int i = 0; i < nfields; ++i) |
| 14847 | { |
| 14848 | struct nextfield &field |
| 14849 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] |
| 14850 | : fip->fields[i - fip->baseclasses.size ()]); |
| 14851 | |
| 14852 | TYPE_FIELD (type, i) = field.field; |
| 14853 | switch (field.accessibility) |
| 14854 | { |
| 14855 | case DW_ACCESS_private: |
| 14856 | if (cu->language != language_ada) |
| 14857 | SET_TYPE_FIELD_PRIVATE (type, i); |
| 14858 | break; |
| 14859 | |
| 14860 | case DW_ACCESS_protected: |
| 14861 | if (cu->language != language_ada) |
| 14862 | SET_TYPE_FIELD_PROTECTED (type, i); |
| 14863 | break; |
| 14864 | |
| 14865 | case DW_ACCESS_public: |
| 14866 | break; |
| 14867 | |
| 14868 | default: |
| 14869 | /* Unknown accessibility. Complain and treat it as public. */ |
| 14870 | { |
| 14871 | complaint (_("unsupported accessibility %d"), |
| 14872 | field.accessibility); |
| 14873 | } |
| 14874 | break; |
| 14875 | } |
| 14876 | if (i < fip->baseclasses.size ()) |
| 14877 | { |
| 14878 | switch (field.virtuality) |
| 14879 | { |
| 14880 | case DW_VIRTUALITY_virtual: |
| 14881 | case DW_VIRTUALITY_pure_virtual: |
| 14882 | if (cu->language == language_ada) |
| 14883 | error (_("unexpected virtuality in component of Ada type")); |
| 14884 | SET_TYPE_FIELD_VIRTUAL (type, i); |
| 14885 | break; |
| 14886 | } |
| 14887 | } |
| 14888 | } |
| 14889 | } |
| 14890 | |
| 14891 | /* Return true if this member function is a constructor, false |
| 14892 | otherwise. */ |
| 14893 | |
| 14894 | static int |
| 14895 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) |
| 14896 | { |
| 14897 | const char *fieldname; |
| 14898 | const char *type_name; |
| 14899 | int len; |
| 14900 | |
| 14901 | if (die->parent == NULL) |
| 14902 | return 0; |
| 14903 | |
| 14904 | if (die->parent->tag != DW_TAG_structure_type |
| 14905 | && die->parent->tag != DW_TAG_union_type |
| 14906 | && die->parent->tag != DW_TAG_class_type) |
| 14907 | return 0; |
| 14908 | |
| 14909 | fieldname = dwarf2_name (die, cu); |
| 14910 | type_name = dwarf2_name (die->parent, cu); |
| 14911 | if (fieldname == NULL || type_name == NULL) |
| 14912 | return 0; |
| 14913 | |
| 14914 | len = strlen (fieldname); |
| 14915 | return (strncmp (fieldname, type_name, len) == 0 |
| 14916 | && (type_name[len] == '\0' || type_name[len] == '<')); |
| 14917 | } |
| 14918 | |
| 14919 | /* Check if the given VALUE is a recognized enum |
| 14920 | dwarf_defaulted_attribute constant according to DWARF5 spec, |
| 14921 | Table 7.24. */ |
| 14922 | |
| 14923 | static bool |
| 14924 | is_valid_DW_AT_defaulted (ULONGEST value) |
| 14925 | { |
| 14926 | switch (value) |
| 14927 | { |
| 14928 | case DW_DEFAULTED_no: |
| 14929 | case DW_DEFAULTED_in_class: |
| 14930 | case DW_DEFAULTED_out_of_class: |
| 14931 | return true; |
| 14932 | } |
| 14933 | |
| 14934 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
| 14935 | return false; |
| 14936 | } |
| 14937 | |
| 14938 | /* Add a member function to the proper fieldlist. */ |
| 14939 | |
| 14940 | static void |
| 14941 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
| 14942 | struct type *type, struct dwarf2_cu *cu) |
| 14943 | { |
| 14944 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14945 | struct attribute *attr; |
| 14946 | int i; |
| 14947 | struct fnfieldlist *flp = nullptr; |
| 14948 | struct fn_field *fnp; |
| 14949 | const char *fieldname; |
| 14950 | struct type *this_type; |
| 14951 | enum dwarf_access_attribute accessibility; |
| 14952 | |
| 14953 | if (cu->language == language_ada) |
| 14954 | error (_("unexpected member function in Ada type")); |
| 14955 | |
| 14956 | /* Get name of member function. */ |
| 14957 | fieldname = dwarf2_name (die, cu); |
| 14958 | if (fieldname == NULL) |
| 14959 | return; |
| 14960 | |
| 14961 | /* Look up member function name in fieldlist. */ |
| 14962 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
| 14963 | { |
| 14964 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
| 14965 | { |
| 14966 | flp = &fip->fnfieldlists[i]; |
| 14967 | break; |
| 14968 | } |
| 14969 | } |
| 14970 | |
| 14971 | /* Create a new fnfieldlist if necessary. */ |
| 14972 | if (flp == nullptr) |
| 14973 | { |
| 14974 | fip->fnfieldlists.emplace_back (); |
| 14975 | flp = &fip->fnfieldlists.back (); |
| 14976 | flp->name = fieldname; |
| 14977 | i = fip->fnfieldlists.size () - 1; |
| 14978 | } |
| 14979 | |
| 14980 | /* Create a new member function field and add it to the vector of |
| 14981 | fnfieldlists. */ |
| 14982 | flp->fnfields.emplace_back (); |
| 14983 | fnp = &flp->fnfields.back (); |
| 14984 | |
| 14985 | /* Delay processing of the physname until later. */ |
| 14986 | if (cu->language == language_cplus) |
| 14987 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
| 14988 | die, cu); |
| 14989 | else |
| 14990 | { |
| 14991 | const char *physname = dwarf2_physname (fieldname, die, cu); |
| 14992 | fnp->physname = physname ? physname : ""; |
| 14993 | } |
| 14994 | |
| 14995 | fnp->type = alloc_type (objfile); |
| 14996 | this_type = read_type_die (die, cu); |
| 14997 | if (this_type && this_type->code () == TYPE_CODE_FUNC) |
| 14998 | { |
| 14999 | int nparams = this_type->num_fields (); |
| 15000 | |
| 15001 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
| 15002 | of the method itself (TYPE_CODE_METHOD). */ |
| 15003 | smash_to_method_type (fnp->type, type, |
| 15004 | TYPE_TARGET_TYPE (this_type), |
| 15005 | this_type->fields (), |
| 15006 | this_type->num_fields (), |
| 15007 | TYPE_VARARGS (this_type)); |
| 15008 | |
| 15009 | /* Handle static member functions. |
| 15010 | Dwarf2 has no clean way to discern C++ static and non-static |
| 15011 | member functions. G++ helps GDB by marking the first |
| 15012 | parameter for non-static member functions (which is the this |
| 15013 | pointer) as artificial. We obtain this information from |
| 15014 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 15015 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
| 15016 | fnp->voffset = VOFFSET_STATIC; |
| 15017 | } |
| 15018 | else |
| 15019 | complaint (_("member function type missing for '%s'"), |
| 15020 | dwarf2_full_name (fieldname, die, cu)); |
| 15021 | |
| 15022 | /* Get fcontext from DW_AT_containing_type if present. */ |
| 15023 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 15024 | fnp->fcontext = die_containing_type (die, cu); |
| 15025 | |
| 15026 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
| 15027 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ |
| 15028 | |
| 15029 | /* Get accessibility. */ |
| 15030 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 15031 | if (attr != nullptr) |
| 15032 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
| 15033 | else |
| 15034 | accessibility = dwarf2_default_access_attribute (die, cu); |
| 15035 | switch (accessibility) |
| 15036 | { |
| 15037 | case DW_ACCESS_private: |
| 15038 | fnp->is_private = 1; |
| 15039 | break; |
| 15040 | case DW_ACCESS_protected: |
| 15041 | fnp->is_protected = 1; |
| 15042 | break; |
| 15043 | } |
| 15044 | |
| 15045 | /* Check for artificial methods. */ |
| 15046 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
| 15047 | if (attr && DW_UNSND (attr) != 0) |
| 15048 | fnp->is_artificial = 1; |
| 15049 | |
| 15050 | /* Check for defaulted methods. */ |
| 15051 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); |
| 15052 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) |
| 15053 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); |
| 15054 | |
| 15055 | /* Check for deleted methods. */ |
| 15056 | attr = dwarf2_attr (die, DW_AT_deleted, cu); |
| 15057 | if (attr != nullptr && DW_UNSND (attr) != 0) |
| 15058 | fnp->is_deleted = 1; |
| 15059 | |
| 15060 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
| 15061 | |
| 15062 | /* Get index in virtual function table if it is a virtual member |
| 15063 | function. For older versions of GCC, this is an offset in the |
| 15064 | appropriate virtual table, as specified by DW_AT_containing_type. |
| 15065 | For everyone else, it is an expression to be evaluated relative |
| 15066 | to the object address. */ |
| 15067 | |
| 15068 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
| 15069 | if (attr != nullptr) |
| 15070 | { |
| 15071 | if (attr->form_is_block () && DW_BLOCK (attr)->size > 0) |
| 15072 | { |
| 15073 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
| 15074 | { |
| 15075 | /* Old-style GCC. */ |
| 15076 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; |
| 15077 | } |
| 15078 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref |
| 15079 | || (DW_BLOCK (attr)->size > 1 |
| 15080 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size |
| 15081 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) |
| 15082 | { |
| 15083 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
| 15084 | if ((fnp->voffset % cu->header.addr_size) != 0) |
| 15085 | dwarf2_complex_location_expr_complaint (); |
| 15086 | else |
| 15087 | fnp->voffset /= cu->header.addr_size; |
| 15088 | fnp->voffset += 2; |
| 15089 | } |
| 15090 | else |
| 15091 | dwarf2_complex_location_expr_complaint (); |
| 15092 | |
| 15093 | if (!fnp->fcontext) |
| 15094 | { |
| 15095 | /* If there is no `this' field and no DW_AT_containing_type, |
| 15096 | we cannot actually find a base class context for the |
| 15097 | vtable! */ |
| 15098 | if (this_type->num_fields () == 0 |
| 15099 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) |
| 15100 | { |
| 15101 | complaint (_("cannot determine context for virtual member " |
| 15102 | "function \"%s\" (offset %s)"), |
| 15103 | fieldname, sect_offset_str (die->sect_off)); |
| 15104 | } |
| 15105 | else |
| 15106 | { |
| 15107 | fnp->fcontext |
| 15108 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); |
| 15109 | } |
| 15110 | } |
| 15111 | } |
| 15112 | else if (attr->form_is_section_offset ()) |
| 15113 | { |
| 15114 | dwarf2_complex_location_expr_complaint (); |
| 15115 | } |
| 15116 | else |
| 15117 | { |
| 15118 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
| 15119 | fieldname); |
| 15120 | } |
| 15121 | } |
| 15122 | else |
| 15123 | { |
| 15124 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
| 15125 | if (attr && DW_UNSND (attr)) |
| 15126 | { |
| 15127 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ |
| 15128 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
| 15129 | "but the vtable offset is not specified"), |
| 15130 | fieldname, sect_offset_str (die->sect_off)); |
| 15131 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15132 | TYPE_CPLUS_DYNAMIC (type) = 1; |
| 15133 | } |
| 15134 | } |
| 15135 | } |
| 15136 | |
| 15137 | /* Create the vector of member function fields, and attach it to the type. */ |
| 15138 | |
| 15139 | static void |
| 15140 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
| 15141 | struct dwarf2_cu *cu) |
| 15142 | { |
| 15143 | if (cu->language == language_ada) |
| 15144 | error (_("unexpected member functions in Ada type")); |
| 15145 | |
| 15146 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15147 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) |
| 15148 | TYPE_ALLOC (type, |
| 15149 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); |
| 15150 | |
| 15151 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
| 15152 | { |
| 15153 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
| 15154 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
| 15155 | |
| 15156 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
| 15157 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); |
| 15158 | fn_flp->fn_fields = (struct fn_field *) |
| 15159 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
| 15160 | |
| 15161 | for (int k = 0; k < nf.fnfields.size (); ++k) |
| 15162 | fn_flp->fn_fields[k] = nf.fnfields[k]; |
| 15163 | } |
| 15164 | |
| 15165 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
| 15166 | } |
| 15167 | |
| 15168 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
| 15169 | language, zero otherwise. */ |
| 15170 | static int |
| 15171 | is_vtable_name (const char *name, struct dwarf2_cu *cu) |
| 15172 | { |
| 15173 | static const char vptr[] = "_vptr"; |
| 15174 | |
| 15175 | /* Look for the C++ form of the vtable. */ |
| 15176 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) |
| 15177 | return 1; |
| 15178 | |
| 15179 | return 0; |
| 15180 | } |
| 15181 | |
| 15182 | /* GCC outputs unnamed structures that are really pointers to member |
| 15183 | functions, with the ABI-specified layout. If TYPE describes |
| 15184 | such a structure, smash it into a member function type. |
| 15185 | |
| 15186 | GCC shouldn't do this; it should just output pointer to member DIEs. |
| 15187 | This is GCC PR debug/28767. */ |
| 15188 | |
| 15189 | static void |
| 15190 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) |
| 15191 | { |
| 15192 | struct type *pfn_type, *self_type, *new_type; |
| 15193 | |
| 15194 | /* Check for a structure with no name and two children. */ |
| 15195 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) |
| 15196 | return; |
| 15197 | |
| 15198 | /* Check for __pfn and __delta members. */ |
| 15199 | if (TYPE_FIELD_NAME (type, 0) == NULL |
| 15200 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 |
| 15201 | || TYPE_FIELD_NAME (type, 1) == NULL |
| 15202 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) |
| 15203 | return; |
| 15204 | |
| 15205 | /* Find the type of the method. */ |
| 15206 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
| 15207 | if (pfn_type == NULL |
| 15208 | || pfn_type->code () != TYPE_CODE_PTR |
| 15209 | || TYPE_TARGET_TYPE (pfn_type)->code () != TYPE_CODE_FUNC) |
| 15210 | return; |
| 15211 | |
| 15212 | /* Look for the "this" argument. */ |
| 15213 | pfn_type = TYPE_TARGET_TYPE (pfn_type); |
| 15214 | if (pfn_type->num_fields () == 0 |
| 15215 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
| 15216 | || TYPE_FIELD_TYPE (pfn_type, 0)->code () != TYPE_CODE_PTR) |
| 15217 | return; |
| 15218 | |
| 15219 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
| 15220 | new_type = alloc_type (objfile); |
| 15221 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
| 15222 | pfn_type->fields (), pfn_type->num_fields (), |
| 15223 | TYPE_VARARGS (pfn_type)); |
| 15224 | smash_to_methodptr_type (type, new_type); |
| 15225 | } |
| 15226 | |
| 15227 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
| 15228 | appropriate error checking and issuing complaints if there is a |
| 15229 | problem. */ |
| 15230 | |
| 15231 | static ULONGEST |
| 15232 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) |
| 15233 | { |
| 15234 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); |
| 15235 | |
| 15236 | if (attr == nullptr) |
| 15237 | return 0; |
| 15238 | |
| 15239 | if (!attr->form_is_constant ()) |
| 15240 | { |
| 15241 | complaint (_("DW_AT_alignment must have constant form" |
| 15242 | " - DIE at %s [in module %s]"), |
| 15243 | sect_offset_str (die->sect_off), |
| 15244 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15245 | return 0; |
| 15246 | } |
| 15247 | |
| 15248 | ULONGEST align; |
| 15249 | if (attr->form == DW_FORM_sdata) |
| 15250 | { |
| 15251 | LONGEST val = DW_SND (attr); |
| 15252 | if (val < 0) |
| 15253 | { |
| 15254 | complaint (_("DW_AT_alignment value must not be negative" |
| 15255 | " - DIE at %s [in module %s]"), |
| 15256 | sect_offset_str (die->sect_off), |
| 15257 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15258 | return 0; |
| 15259 | } |
| 15260 | align = val; |
| 15261 | } |
| 15262 | else |
| 15263 | align = DW_UNSND (attr); |
| 15264 | |
| 15265 | if (align == 0) |
| 15266 | { |
| 15267 | complaint (_("DW_AT_alignment value must not be zero" |
| 15268 | " - DIE at %s [in module %s]"), |
| 15269 | sect_offset_str (die->sect_off), |
| 15270 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15271 | return 0; |
| 15272 | } |
| 15273 | if ((align & (align - 1)) != 0) |
| 15274 | { |
| 15275 | complaint (_("DW_AT_alignment value must be a power of 2" |
| 15276 | " - DIE at %s [in module %s]"), |
| 15277 | sect_offset_str (die->sect_off), |
| 15278 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15279 | return 0; |
| 15280 | } |
| 15281 | |
| 15282 | return align; |
| 15283 | } |
| 15284 | |
| 15285 | /* If the DIE has a DW_AT_alignment attribute, use its value to set |
| 15286 | the alignment for TYPE. */ |
| 15287 | |
| 15288 | static void |
| 15289 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, |
| 15290 | struct type *type) |
| 15291 | { |
| 15292 | if (!set_type_align (type, get_alignment (cu, die))) |
| 15293 | complaint (_("DW_AT_alignment value too large" |
| 15294 | " - DIE at %s [in module %s]"), |
| 15295 | sect_offset_str (die->sect_off), |
| 15296 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15297 | } |
| 15298 | |
| 15299 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
| 15300 | constant for a type, according to DWARF5 spec, Table 5.5. */ |
| 15301 | |
| 15302 | static bool |
| 15303 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) |
| 15304 | { |
| 15305 | switch (value) |
| 15306 | { |
| 15307 | case DW_CC_normal: |
| 15308 | case DW_CC_pass_by_reference: |
| 15309 | case DW_CC_pass_by_value: |
| 15310 | return true; |
| 15311 | |
| 15312 | default: |
| 15313 | complaint (_("unrecognized DW_AT_calling_convention value " |
| 15314 | "(%s) for a type"), pulongest (value)); |
| 15315 | return false; |
| 15316 | } |
| 15317 | } |
| 15318 | |
| 15319 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
| 15320 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and |
| 15321 | also according to GNU-specific values (see include/dwarf2.h). */ |
| 15322 | |
| 15323 | static bool |
| 15324 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) |
| 15325 | { |
| 15326 | switch (value) |
| 15327 | { |
| 15328 | case DW_CC_normal: |
| 15329 | case DW_CC_program: |
| 15330 | case DW_CC_nocall: |
| 15331 | return true; |
| 15332 | |
| 15333 | case DW_CC_GNU_renesas_sh: |
| 15334 | case DW_CC_GNU_borland_fastcall_i386: |
| 15335 | case DW_CC_GDB_IBM_OpenCL: |
| 15336 | return true; |
| 15337 | |
| 15338 | default: |
| 15339 | complaint (_("unrecognized DW_AT_calling_convention value " |
| 15340 | "(%s) for a subroutine"), pulongest (value)); |
| 15341 | return false; |
| 15342 | } |
| 15343 | } |
| 15344 | |
| 15345 | /* Called when we find the DIE that starts a structure or union scope |
| 15346 | (definition) to create a type for the structure or union. Fill in |
| 15347 | the type's name and general properties; the members will not be |
| 15348 | processed until process_structure_scope. A symbol table entry for |
| 15349 | the type will also not be done until process_structure_scope (assuming |
| 15350 | the type has a name). |
| 15351 | |
| 15352 | NOTE: we need to call these functions regardless of whether or not the |
| 15353 | DIE has a DW_AT_name attribute, since it might be an anonymous |
| 15354 | structure or union. This gets the type entered into our set of |
| 15355 | user defined types. */ |
| 15356 | |
| 15357 | static struct type * |
| 15358 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
| 15359 | { |
| 15360 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15361 | struct type *type; |
| 15362 | struct attribute *attr; |
| 15363 | const char *name; |
| 15364 | |
| 15365 | /* If the definition of this type lives in .debug_types, read that type. |
| 15366 | Don't follow DW_AT_specification though, that will take us back up |
| 15367 | the chain and we want to go down. */ |
| 15368 | attr = die->attr (DW_AT_signature); |
| 15369 | if (attr != nullptr) |
| 15370 | { |
| 15371 | type = get_DW_AT_signature_type (die, attr, cu); |
| 15372 | |
| 15373 | /* The type's CU may not be the same as CU. |
| 15374 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 15375 | return set_die_type (die, type, cu); |
| 15376 | } |
| 15377 | |
| 15378 | type = alloc_type (objfile); |
| 15379 | INIT_CPLUS_SPECIFIC (type); |
| 15380 | |
| 15381 | name = dwarf2_name (die, cu); |
| 15382 | if (name != NULL) |
| 15383 | { |
| 15384 | if (cu->language == language_cplus |
| 15385 | || cu->language == language_d |
| 15386 | || cu->language == language_rust) |
| 15387 | { |
| 15388 | const char *full_name = dwarf2_full_name (name, die, cu); |
| 15389 | |
| 15390 | /* dwarf2_full_name might have already finished building the DIE's |
| 15391 | type. If so, there is no need to continue. */ |
| 15392 | if (get_die_type (die, cu) != NULL) |
| 15393 | return get_die_type (die, cu); |
| 15394 | |
| 15395 | type->set_name (full_name); |
| 15396 | } |
| 15397 | else |
| 15398 | { |
| 15399 | /* The name is already allocated along with this objfile, so |
| 15400 | we don't need to duplicate it for the type. */ |
| 15401 | type->set_name (name); |
| 15402 | } |
| 15403 | } |
| 15404 | |
| 15405 | if (die->tag == DW_TAG_structure_type) |
| 15406 | { |
| 15407 | type->set_code (TYPE_CODE_STRUCT); |
| 15408 | } |
| 15409 | else if (die->tag == DW_TAG_union_type) |
| 15410 | { |
| 15411 | type->set_code (TYPE_CODE_UNION); |
| 15412 | } |
| 15413 | else |
| 15414 | { |
| 15415 | type->set_code (TYPE_CODE_STRUCT); |
| 15416 | } |
| 15417 | |
| 15418 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
| 15419 | TYPE_DECLARED_CLASS (type) = 1; |
| 15420 | |
| 15421 | /* Store the calling convention in the type if it's available in |
| 15422 | the die. Otherwise the calling convention remains set to |
| 15423 | the default value DW_CC_normal. */ |
| 15424 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); |
| 15425 | if (attr != nullptr |
| 15426 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) |
| 15427 | { |
| 15428 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15429 | TYPE_CPLUS_CALLING_CONVENTION (type) |
| 15430 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); |
| 15431 | } |
| 15432 | |
| 15433 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 15434 | if (attr != nullptr) |
| 15435 | { |
| 15436 | if (attr->form_is_constant ()) |
| 15437 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 15438 | else |
| 15439 | { |
| 15440 | struct dynamic_prop prop; |
| 15441 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
| 15442 | cu->per_cu->addr_type ())) |
| 15443 | type->add_dyn_prop (DYN_PROP_BYTE_SIZE, prop); |
| 15444 | TYPE_LENGTH (type) = 0; |
| 15445 | } |
| 15446 | } |
| 15447 | else |
| 15448 | { |
| 15449 | TYPE_LENGTH (type) = 0; |
| 15450 | } |
| 15451 | |
| 15452 | maybe_set_alignment (cu, die, type); |
| 15453 | |
| 15454 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
| 15455 | { |
| 15456 | /* ICC<14 does not output the required DW_AT_declaration on |
| 15457 | incomplete types, but gives them a size of zero. */ |
| 15458 | TYPE_STUB (type) = 1; |
| 15459 | } |
| 15460 | else |
| 15461 | TYPE_STUB_SUPPORTED (type) = 1; |
| 15462 | |
| 15463 | if (die_is_declaration (die, cu)) |
| 15464 | TYPE_STUB (type) = 1; |
| 15465 | else if (attr == NULL && die->child == NULL |
| 15466 | && producer_is_realview (cu->producer)) |
| 15467 | /* RealView does not output the required DW_AT_declaration |
| 15468 | on incomplete types. */ |
| 15469 | TYPE_STUB (type) = 1; |
| 15470 | |
| 15471 | /* We need to add the type field to the die immediately so we don't |
| 15472 | infinitely recurse when dealing with pointers to the structure |
| 15473 | type within the structure itself. */ |
| 15474 | set_die_type (die, type, cu); |
| 15475 | |
| 15476 | /* set_die_type should be already done. */ |
| 15477 | set_descriptive_type (type, die, cu); |
| 15478 | |
| 15479 | return type; |
| 15480 | } |
| 15481 | |
| 15482 | static void handle_struct_member_die |
| 15483 | (struct die_info *child_die, |
| 15484 | struct type *type, |
| 15485 | struct field_info *fi, |
| 15486 | std::vector<struct symbol *> *template_args, |
| 15487 | struct dwarf2_cu *cu); |
| 15488 | |
| 15489 | /* A helper for handle_struct_member_die that handles |
| 15490 | DW_TAG_variant_part. */ |
| 15491 | |
| 15492 | static void |
| 15493 | handle_variant_part (struct die_info *die, struct type *type, |
| 15494 | struct field_info *fi, |
| 15495 | std::vector<struct symbol *> *template_args, |
| 15496 | struct dwarf2_cu *cu) |
| 15497 | { |
| 15498 | variant_part_builder *new_part; |
| 15499 | if (fi->current_variant_part == nullptr) |
| 15500 | { |
| 15501 | fi->variant_parts.emplace_back (); |
| 15502 | new_part = &fi->variant_parts.back (); |
| 15503 | } |
| 15504 | else if (!fi->current_variant_part->processing_variant) |
| 15505 | { |
| 15506 | complaint (_("nested DW_TAG_variant_part seen " |
| 15507 | "- DIE at %s [in module %s]"), |
| 15508 | sect_offset_str (die->sect_off), |
| 15509 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15510 | return; |
| 15511 | } |
| 15512 | else |
| 15513 | { |
| 15514 | variant_field ¤t = fi->current_variant_part->variants.back (); |
| 15515 | current.variant_parts.emplace_back (); |
| 15516 | new_part = ¤t.variant_parts.back (); |
| 15517 | } |
| 15518 | |
| 15519 | /* When we recurse, we want callees to add to this new variant |
| 15520 | part. */ |
| 15521 | scoped_restore save_current_variant_part |
| 15522 | = make_scoped_restore (&fi->current_variant_part, new_part); |
| 15523 | |
| 15524 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); |
| 15525 | if (discr == NULL) |
| 15526 | { |
| 15527 | /* It's a univariant form, an extension we support. */ |
| 15528 | } |
| 15529 | else if (discr->form_is_ref ()) |
| 15530 | { |
| 15531 | struct dwarf2_cu *target_cu = cu; |
| 15532 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); |
| 15533 | |
| 15534 | new_part->discriminant_offset = target_die->sect_off; |
| 15535 | } |
| 15536 | else |
| 15537 | { |
| 15538 | complaint (_("DW_AT_discr does not have DIE reference form" |
| 15539 | " - DIE at %s [in module %s]"), |
| 15540 | sect_offset_str (die->sect_off), |
| 15541 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15542 | } |
| 15543 | |
| 15544 | for (die_info *child_die = die->child; |
| 15545 | child_die != NULL; |
| 15546 | child_die = child_die->sibling) |
| 15547 | handle_struct_member_die (child_die, type, fi, template_args, cu); |
| 15548 | } |
| 15549 | |
| 15550 | /* A helper for handle_struct_member_die that handles |
| 15551 | DW_TAG_variant. */ |
| 15552 | |
| 15553 | static void |
| 15554 | handle_variant (struct die_info *die, struct type *type, |
| 15555 | struct field_info *fi, |
| 15556 | std::vector<struct symbol *> *template_args, |
| 15557 | struct dwarf2_cu *cu) |
| 15558 | { |
| 15559 | if (fi->current_variant_part == nullptr) |
| 15560 | { |
| 15561 | complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part " |
| 15562 | "- DIE at %s [in module %s]"), |
| 15563 | sect_offset_str (die->sect_off), |
| 15564 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15565 | return; |
| 15566 | } |
| 15567 | if (fi->current_variant_part->processing_variant) |
| 15568 | { |
| 15569 | complaint (_("nested DW_TAG_variant seen " |
| 15570 | "- DIE at %s [in module %s]"), |
| 15571 | sect_offset_str (die->sect_off), |
| 15572 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 15573 | return; |
| 15574 | } |
| 15575 | |
| 15576 | scoped_restore save_processing_variant |
| 15577 | = make_scoped_restore (&fi->current_variant_part->processing_variant, |
| 15578 | true); |
| 15579 | |
| 15580 | fi->current_variant_part->variants.emplace_back (); |
| 15581 | variant_field &variant = fi->current_variant_part->variants.back (); |
| 15582 | variant.first_field = fi->fields.size (); |
| 15583 | |
| 15584 | /* In a variant we want to get the discriminant and also add a |
| 15585 | field for our sole member child. */ |
| 15586 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr_value, cu); |
| 15587 | if (discr == nullptr) |
| 15588 | { |
| 15589 | discr = dwarf2_attr (die, DW_AT_discr_list, cu); |
| 15590 | if (discr == nullptr || DW_BLOCK (discr)->size == 0) |
| 15591 | variant.default_branch = true; |
| 15592 | else |
| 15593 | variant.discr_list_data = DW_BLOCK (discr); |
| 15594 | } |
| 15595 | else |
| 15596 | variant.discriminant_value = DW_UNSND (discr); |
| 15597 | |
| 15598 | for (die_info *variant_child = die->child; |
| 15599 | variant_child != NULL; |
| 15600 | variant_child = variant_child->sibling) |
| 15601 | handle_struct_member_die (variant_child, type, fi, template_args, cu); |
| 15602 | |
| 15603 | variant.last_field = fi->fields.size (); |
| 15604 | } |
| 15605 | |
| 15606 | /* A helper for process_structure_scope that handles a single member |
| 15607 | DIE. */ |
| 15608 | |
| 15609 | static void |
| 15610 | handle_struct_member_die (struct die_info *child_die, struct type *type, |
| 15611 | struct field_info *fi, |
| 15612 | std::vector<struct symbol *> *template_args, |
| 15613 | struct dwarf2_cu *cu) |
| 15614 | { |
| 15615 | if (child_die->tag == DW_TAG_member |
| 15616 | || child_die->tag == DW_TAG_variable) |
| 15617 | { |
| 15618 | /* NOTE: carlton/2002-11-05: A C++ static data member |
| 15619 | should be a DW_TAG_member that is a declaration, but |
| 15620 | all versions of G++ as of this writing (so through at |
| 15621 | least 3.2.1) incorrectly generate DW_TAG_variable |
| 15622 | tags for them instead. */ |
| 15623 | dwarf2_add_field (fi, child_die, cu); |
| 15624 | } |
| 15625 | else if (child_die->tag == DW_TAG_subprogram) |
| 15626 | { |
| 15627 | /* Rust doesn't have member functions in the C++ sense. |
| 15628 | However, it does emit ordinary functions as children |
| 15629 | of a struct DIE. */ |
| 15630 | if (cu->language == language_rust) |
| 15631 | read_func_scope (child_die, cu); |
| 15632 | else |
| 15633 | { |
| 15634 | /* C++ member function. */ |
| 15635 | dwarf2_add_member_fn (fi, child_die, type, cu); |
| 15636 | } |
| 15637 | } |
| 15638 | else if (child_die->tag == DW_TAG_inheritance) |
| 15639 | { |
| 15640 | /* C++ base class field. */ |
| 15641 | dwarf2_add_field (fi, child_die, cu); |
| 15642 | } |
| 15643 | else if (type_can_define_types (child_die)) |
| 15644 | dwarf2_add_type_defn (fi, child_die, cu); |
| 15645 | else if (child_die->tag == DW_TAG_template_type_param |
| 15646 | || child_die->tag == DW_TAG_template_value_param) |
| 15647 | { |
| 15648 | struct symbol *arg = new_symbol (child_die, NULL, cu); |
| 15649 | |
| 15650 | if (arg != NULL) |
| 15651 | template_args->push_back (arg); |
| 15652 | } |
| 15653 | else if (child_die->tag == DW_TAG_variant_part) |
| 15654 | handle_variant_part (child_die, type, fi, template_args, cu); |
| 15655 | else if (child_die->tag == DW_TAG_variant) |
| 15656 | handle_variant (child_die, type, fi, template_args, cu); |
| 15657 | } |
| 15658 | |
| 15659 | /* Finish creating a structure or union type, including filling in |
| 15660 | its members and creating a symbol for it. */ |
| 15661 | |
| 15662 | static void |
| 15663 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 15664 | { |
| 15665 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15666 | struct die_info *child_die; |
| 15667 | struct type *type; |
| 15668 | |
| 15669 | type = get_die_type (die, cu); |
| 15670 | if (type == NULL) |
| 15671 | type = read_structure_type (die, cu); |
| 15672 | |
| 15673 | bool has_template_parameters = false; |
| 15674 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
| 15675 | { |
| 15676 | struct field_info fi; |
| 15677 | std::vector<struct symbol *> template_args; |
| 15678 | |
| 15679 | child_die = die->child; |
| 15680 | |
| 15681 | while (child_die && child_die->tag) |
| 15682 | { |
| 15683 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
| 15684 | child_die = child_die->sibling; |
| 15685 | } |
| 15686 | |
| 15687 | /* Attach template arguments to type. */ |
| 15688 | if (!template_args.empty ()) |
| 15689 | { |
| 15690 | has_template_parameters = true; |
| 15691 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15692 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
| 15693 | TYPE_TEMPLATE_ARGUMENTS (type) |
| 15694 | = XOBNEWVEC (&objfile->objfile_obstack, |
| 15695 | struct symbol *, |
| 15696 | TYPE_N_TEMPLATE_ARGUMENTS (type)); |
| 15697 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
| 15698 | template_args.data (), |
| 15699 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
| 15700 | * sizeof (struct symbol *))); |
| 15701 | } |
| 15702 | |
| 15703 | /* Attach fields and member functions to the type. */ |
| 15704 | if (fi.nfields () > 0) |
| 15705 | dwarf2_attach_fields_to_type (&fi, type, cu); |
| 15706 | if (!fi.fnfieldlists.empty ()) |
| 15707 | { |
| 15708 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
| 15709 | |
| 15710 | /* Get the type which refers to the base class (possibly this |
| 15711 | class itself) which contains the vtable pointer for the current |
| 15712 | class from the DW_AT_containing_type attribute. This use of |
| 15713 | DW_AT_containing_type is a GNU extension. */ |
| 15714 | |
| 15715 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 15716 | { |
| 15717 | struct type *t = die_containing_type (die, cu); |
| 15718 | |
| 15719 | set_type_vptr_basetype (type, t); |
| 15720 | if (type == t) |
| 15721 | { |
| 15722 | int i; |
| 15723 | |
| 15724 | /* Our own class provides vtbl ptr. */ |
| 15725 | for (i = t->num_fields () - 1; |
| 15726 | i >= TYPE_N_BASECLASSES (t); |
| 15727 | --i) |
| 15728 | { |
| 15729 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
| 15730 | |
| 15731 | if (is_vtable_name (fieldname, cu)) |
| 15732 | { |
| 15733 | set_type_vptr_fieldno (type, i); |
| 15734 | break; |
| 15735 | } |
| 15736 | } |
| 15737 | |
| 15738 | /* Complain if virtual function table field not found. */ |
| 15739 | if (i < TYPE_N_BASECLASSES (t)) |
| 15740 | complaint (_("virtual function table pointer " |
| 15741 | "not found when defining class '%s'"), |
| 15742 | type->name () ? type->name () : ""); |
| 15743 | } |
| 15744 | else |
| 15745 | { |
| 15746 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
| 15747 | } |
| 15748 | } |
| 15749 | else if (cu->producer |
| 15750 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
| 15751 | { |
| 15752 | /* The IBM XLC compiler does not provide direct indication |
| 15753 | of the containing type, but the vtable pointer is |
| 15754 | always named __vfp. */ |
| 15755 | |
| 15756 | int i; |
| 15757 | |
| 15758 | for (i = type->num_fields () - 1; |
| 15759 | i >= TYPE_N_BASECLASSES (type); |
| 15760 | --i) |
| 15761 | { |
| 15762 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) |
| 15763 | { |
| 15764 | set_type_vptr_fieldno (type, i); |
| 15765 | set_type_vptr_basetype (type, type); |
| 15766 | break; |
| 15767 | } |
| 15768 | } |
| 15769 | } |
| 15770 | } |
| 15771 | |
| 15772 | /* Copy fi.typedef_field_list linked list elements content into the |
| 15773 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ |
| 15774 | if (!fi.typedef_field_list.empty ()) |
| 15775 | { |
| 15776 | int count = fi.typedef_field_list.size (); |
| 15777 | |
| 15778 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15779 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
| 15780 | = ((struct decl_field *) |
| 15781 | TYPE_ALLOC (type, |
| 15782 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); |
| 15783 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; |
| 15784 | |
| 15785 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
| 15786 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; |
| 15787 | } |
| 15788 | |
| 15789 | /* Copy fi.nested_types_list linked list elements content into the |
| 15790 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ |
| 15791 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
| 15792 | { |
| 15793 | int count = fi.nested_types_list.size (); |
| 15794 | |
| 15795 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15796 | TYPE_NESTED_TYPES_ARRAY (type) |
| 15797 | = ((struct decl_field *) |
| 15798 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
| 15799 | TYPE_NESTED_TYPES_COUNT (type) = count; |
| 15800 | |
| 15801 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
| 15802 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; |
| 15803 | } |
| 15804 | } |
| 15805 | |
| 15806 | quirk_gcc_member_function_pointer (type, objfile); |
| 15807 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
| 15808 | cu->rust_unions.push_back (type); |
| 15809 | |
| 15810 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
| 15811 | snapshots) has been known to create a die giving a declaration |
| 15812 | for a class that has, as a child, a die giving a definition for a |
| 15813 | nested class. So we have to process our children even if the |
| 15814 | current die is a declaration. Normally, of course, a declaration |
| 15815 | won't have any children at all. */ |
| 15816 | |
| 15817 | child_die = die->child; |
| 15818 | |
| 15819 | while (child_die != NULL && child_die->tag) |
| 15820 | { |
| 15821 | if (child_die->tag == DW_TAG_member |
| 15822 | || child_die->tag == DW_TAG_variable |
| 15823 | || child_die->tag == DW_TAG_inheritance |
| 15824 | || child_die->tag == DW_TAG_template_value_param |
| 15825 | || child_die->tag == DW_TAG_template_type_param) |
| 15826 | { |
| 15827 | /* Do nothing. */ |
| 15828 | } |
| 15829 | else |
| 15830 | process_die (child_die, cu); |
| 15831 | |
| 15832 | child_die = child_die->sibling; |
| 15833 | } |
| 15834 | |
| 15835 | /* Do not consider external references. According to the DWARF standard, |
| 15836 | these DIEs are identified by the fact that they have no byte_size |
| 15837 | attribute, and a declaration attribute. */ |
| 15838 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL |
| 15839 | || !die_is_declaration (die, cu) |
| 15840 | || dwarf2_attr (die, DW_AT_signature, cu) != NULL) |
| 15841 | { |
| 15842 | struct symbol *sym = new_symbol (die, type, cu); |
| 15843 | |
| 15844 | if (has_template_parameters) |
| 15845 | { |
| 15846 | struct symtab *symtab; |
| 15847 | if (sym != nullptr) |
| 15848 | symtab = symbol_symtab (sym); |
| 15849 | else if (cu->line_header != nullptr) |
| 15850 | { |
| 15851 | /* Any related symtab will do. */ |
| 15852 | symtab |
| 15853 | = cu->line_header->file_names ()[0].symtab; |
| 15854 | } |
| 15855 | else |
| 15856 | { |
| 15857 | symtab = nullptr; |
| 15858 | complaint (_("could not find suitable " |
| 15859 | "symtab for template parameter" |
| 15860 | " - DIE at %s [in module %s]"), |
| 15861 | sect_offset_str (die->sect_off), |
| 15862 | objfile_name (objfile)); |
| 15863 | } |
| 15864 | |
| 15865 | if (symtab != nullptr) |
| 15866 | { |
| 15867 | /* Make sure that the symtab is set on the new symbols. |
| 15868 | Even though they don't appear in this symtab directly, |
| 15869 | other parts of gdb assume that symbols do, and this is |
| 15870 | reasonably true. */ |
| 15871 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) |
| 15872 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); |
| 15873 | } |
| 15874 | } |
| 15875 | } |
| 15876 | } |
| 15877 | |
| 15878 | /* Assuming DIE is an enumeration type, and TYPE is its associated |
| 15879 | type, update TYPE using some information only available in DIE's |
| 15880 | children. In particular, the fields are computed. */ |
| 15881 | |
| 15882 | static void |
| 15883 | update_enumeration_type_from_children (struct die_info *die, |
| 15884 | struct type *type, |
| 15885 | struct dwarf2_cu *cu) |
| 15886 | { |
| 15887 | struct die_info *child_die; |
| 15888 | int unsigned_enum = 1; |
| 15889 | int flag_enum = 1; |
| 15890 | |
| 15891 | auto_obstack obstack; |
| 15892 | std::vector<struct field> fields; |
| 15893 | |
| 15894 | for (child_die = die->child; |
| 15895 | child_die != NULL && child_die->tag; |
| 15896 | child_die = child_die->sibling) |
| 15897 | { |
| 15898 | struct attribute *attr; |
| 15899 | LONGEST value; |
| 15900 | const gdb_byte *bytes; |
| 15901 | struct dwarf2_locexpr_baton *baton; |
| 15902 | const char *name; |
| 15903 | |
| 15904 | if (child_die->tag != DW_TAG_enumerator) |
| 15905 | continue; |
| 15906 | |
| 15907 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); |
| 15908 | if (attr == NULL) |
| 15909 | continue; |
| 15910 | |
| 15911 | name = dwarf2_name (child_die, cu); |
| 15912 | if (name == NULL) |
| 15913 | name = "<anonymous enumerator>"; |
| 15914 | |
| 15915 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, |
| 15916 | &value, &bytes, &baton); |
| 15917 | if (value < 0) |
| 15918 | { |
| 15919 | unsigned_enum = 0; |
| 15920 | flag_enum = 0; |
| 15921 | } |
| 15922 | else |
| 15923 | { |
| 15924 | if (count_one_bits_ll (value) >= 2) |
| 15925 | flag_enum = 0; |
| 15926 | } |
| 15927 | |
| 15928 | fields.emplace_back (); |
| 15929 | struct field &field = fields.back (); |
| 15930 | FIELD_NAME (field) = dwarf2_physname (name, child_die, cu); |
| 15931 | SET_FIELD_ENUMVAL (field, value); |
| 15932 | } |
| 15933 | |
| 15934 | if (!fields.empty ()) |
| 15935 | { |
| 15936 | type->set_num_fields (fields.size ()); |
| 15937 | type->set_fields |
| 15938 | ((struct field *) |
| 15939 | TYPE_ALLOC (type, sizeof (struct field) * fields.size ())); |
| 15940 | memcpy (type->fields (), fields.data (), |
| 15941 | sizeof (struct field) * fields.size ()); |
| 15942 | } |
| 15943 | |
| 15944 | if (unsigned_enum) |
| 15945 | TYPE_UNSIGNED (type) = 1; |
| 15946 | if (flag_enum) |
| 15947 | TYPE_FLAG_ENUM (type) = 1; |
| 15948 | } |
| 15949 | |
| 15950 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
| 15951 | complete the type's fields yet, or create any symbols. */ |
| 15952 | |
| 15953 | static struct type * |
| 15954 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
| 15955 | { |
| 15956 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15957 | struct type *type; |
| 15958 | struct attribute *attr; |
| 15959 | const char *name; |
| 15960 | |
| 15961 | /* If the definition of this type lives in .debug_types, read that type. |
| 15962 | Don't follow DW_AT_specification though, that will take us back up |
| 15963 | the chain and we want to go down. */ |
| 15964 | attr = die->attr (DW_AT_signature); |
| 15965 | if (attr != nullptr) |
| 15966 | { |
| 15967 | type = get_DW_AT_signature_type (die, attr, cu); |
| 15968 | |
| 15969 | /* The type's CU may not be the same as CU. |
| 15970 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 15971 | return set_die_type (die, type, cu); |
| 15972 | } |
| 15973 | |
| 15974 | type = alloc_type (objfile); |
| 15975 | |
| 15976 | type->set_code (TYPE_CODE_ENUM); |
| 15977 | name = dwarf2_full_name (NULL, die, cu); |
| 15978 | if (name != NULL) |
| 15979 | type->set_name (name); |
| 15980 | |
| 15981 | attr = dwarf2_attr (die, DW_AT_type, cu); |
| 15982 | if (attr != NULL) |
| 15983 | { |
| 15984 | struct type *underlying_type = die_type (die, cu); |
| 15985 | |
| 15986 | TYPE_TARGET_TYPE (type) = underlying_type; |
| 15987 | } |
| 15988 | |
| 15989 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 15990 | if (attr != nullptr) |
| 15991 | { |
| 15992 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 15993 | } |
| 15994 | else |
| 15995 | { |
| 15996 | TYPE_LENGTH (type) = 0; |
| 15997 | } |
| 15998 | |
| 15999 | maybe_set_alignment (cu, die, type); |
| 16000 | |
| 16001 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
| 16002 | declared as private in the package spec, and then defined only |
| 16003 | inside the package body. Such types are known as Taft Amendment |
| 16004 | Types. When another package uses such a type, an incomplete DIE |
| 16005 | may be generated by the compiler. */ |
| 16006 | if (die_is_declaration (die, cu)) |
| 16007 | TYPE_STUB (type) = 1; |
| 16008 | |
| 16009 | /* If this type has an underlying type that is not a stub, then we |
| 16010 | may use its attributes. We always use the "unsigned" attribute |
| 16011 | in this situation, because ordinarily we guess whether the type |
| 16012 | is unsigned -- but the guess can be wrong and the underlying type |
| 16013 | can tell us the reality. However, we defer to a local size |
| 16014 | attribute if one exists, because this lets the compiler override |
| 16015 | the underlying type if needed. */ |
| 16016 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) |
| 16017 | { |
| 16018 | struct type *underlying_type = TYPE_TARGET_TYPE (type); |
| 16019 | underlying_type = check_typedef (underlying_type); |
| 16020 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (underlying_type); |
| 16021 | if (TYPE_LENGTH (type) == 0) |
| 16022 | TYPE_LENGTH (type) = TYPE_LENGTH (underlying_type); |
| 16023 | if (TYPE_RAW_ALIGN (type) == 0 |
| 16024 | && TYPE_RAW_ALIGN (underlying_type) != 0) |
| 16025 | set_type_align (type, TYPE_RAW_ALIGN (underlying_type)); |
| 16026 | } |
| 16027 | |
| 16028 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
| 16029 | |
| 16030 | set_die_type (die, type, cu); |
| 16031 | |
| 16032 | /* Finish the creation of this type by using the enum's children. |
| 16033 | Note that, as usual, this must come after set_die_type to avoid |
| 16034 | infinite recursion when trying to compute the names of the |
| 16035 | enumerators. */ |
| 16036 | update_enumeration_type_from_children (die, type, cu); |
| 16037 | |
| 16038 | return type; |
| 16039 | } |
| 16040 | |
| 16041 | /* Given a pointer to a die which begins an enumeration, process all |
| 16042 | the dies that define the members of the enumeration, and create the |
| 16043 | symbol for the enumeration type. |
| 16044 | |
| 16045 | NOTE: We reverse the order of the element list. */ |
| 16046 | |
| 16047 | static void |
| 16048 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 16049 | { |
| 16050 | struct type *this_type; |
| 16051 | |
| 16052 | this_type = get_die_type (die, cu); |
| 16053 | if (this_type == NULL) |
| 16054 | this_type = read_enumeration_type (die, cu); |
| 16055 | |
| 16056 | if (die->child != NULL) |
| 16057 | { |
| 16058 | struct die_info *child_die; |
| 16059 | const char *name; |
| 16060 | |
| 16061 | child_die = die->child; |
| 16062 | while (child_die && child_die->tag) |
| 16063 | { |
| 16064 | if (child_die->tag != DW_TAG_enumerator) |
| 16065 | { |
| 16066 | process_die (child_die, cu); |
| 16067 | } |
| 16068 | else |
| 16069 | { |
| 16070 | name = dwarf2_name (child_die, cu); |
| 16071 | if (name) |
| 16072 | new_symbol (child_die, this_type, cu); |
| 16073 | } |
| 16074 | |
| 16075 | child_die = child_die->sibling; |
| 16076 | } |
| 16077 | } |
| 16078 | |
| 16079 | /* If we are reading an enum from a .debug_types unit, and the enum |
| 16080 | is a declaration, and the enum is not the signatured type in the |
| 16081 | unit, then we do not want to add a symbol for it. Adding a |
| 16082 | symbol would in some cases obscure the true definition of the |
| 16083 | enum, giving users an incomplete type when the definition is |
| 16084 | actually available. Note that we do not want to do this for all |
| 16085 | enums which are just declarations, because C++0x allows forward |
| 16086 | enum declarations. */ |
| 16087 | if (cu->per_cu->is_debug_types |
| 16088 | && die_is_declaration (die, cu)) |
| 16089 | { |
| 16090 | struct signatured_type *sig_type; |
| 16091 | |
| 16092 | sig_type = (struct signatured_type *) cu->per_cu; |
| 16093 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
| 16094 | if (sig_type->type_offset_in_section != die->sect_off) |
| 16095 | return; |
| 16096 | } |
| 16097 | |
| 16098 | new_symbol (die, this_type, cu); |
| 16099 | } |
| 16100 | |
| 16101 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
| 16102 | the DIE's type field. For now, this only handles one dimensional |
| 16103 | arrays. */ |
| 16104 | |
| 16105 | static struct type * |
| 16106 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16107 | { |
| 16108 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16109 | struct die_info *child_die; |
| 16110 | struct type *type; |
| 16111 | struct type *element_type, *range_type, *index_type; |
| 16112 | struct attribute *attr; |
| 16113 | const char *name; |
| 16114 | struct dynamic_prop *byte_stride_prop = NULL; |
| 16115 | unsigned int bit_stride = 0; |
| 16116 | |
| 16117 | element_type = die_type (die, cu); |
| 16118 | |
| 16119 | /* The die_type call above may have already set the type for this DIE. */ |
| 16120 | type = get_die_type (die, cu); |
| 16121 | if (type) |
| 16122 | return type; |
| 16123 | |
| 16124 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
| 16125 | if (attr != NULL) |
| 16126 | { |
| 16127 | int stride_ok; |
| 16128 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
| 16129 | |
| 16130 | byte_stride_prop |
| 16131 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); |
| 16132 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
| 16133 | prop_type); |
| 16134 | if (!stride_ok) |
| 16135 | { |
| 16136 | complaint (_("unable to read array DW_AT_byte_stride " |
| 16137 | " - DIE at %s [in module %s]"), |
| 16138 | sect_offset_str (die->sect_off), |
| 16139 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 16140 | /* Ignore this attribute. We will likely not be able to print |
| 16141 | arrays of this type correctly, but there is little we can do |
| 16142 | to help if we cannot read the attribute's value. */ |
| 16143 | byte_stride_prop = NULL; |
| 16144 | } |
| 16145 | } |
| 16146 | |
| 16147 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); |
| 16148 | if (attr != NULL) |
| 16149 | bit_stride = DW_UNSND (attr); |
| 16150 | |
| 16151 | /* Irix 6.2 native cc creates array types without children for |
| 16152 | arrays with unspecified length. */ |
| 16153 | if (die->child == NULL) |
| 16154 | { |
| 16155 | index_type = objfile_type (objfile)->builtin_int; |
| 16156 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
| 16157 | type = create_array_type_with_stride (NULL, element_type, range_type, |
| 16158 | byte_stride_prop, bit_stride); |
| 16159 | return set_die_type (die, type, cu); |
| 16160 | } |
| 16161 | |
| 16162 | std::vector<struct type *> range_types; |
| 16163 | child_die = die->child; |
| 16164 | while (child_die && child_die->tag) |
| 16165 | { |
| 16166 | if (child_die->tag == DW_TAG_subrange_type) |
| 16167 | { |
| 16168 | struct type *child_type = read_type_die (child_die, cu); |
| 16169 | |
| 16170 | if (child_type != NULL) |
| 16171 | { |
| 16172 | /* The range type was succesfully read. Save it for the |
| 16173 | array type creation. */ |
| 16174 | range_types.push_back (child_type); |
| 16175 | } |
| 16176 | } |
| 16177 | child_die = child_die->sibling; |
| 16178 | } |
| 16179 | |
| 16180 | /* Dwarf2 dimensions are output from left to right, create the |
| 16181 | necessary array types in backwards order. */ |
| 16182 | |
| 16183 | type = element_type; |
| 16184 | |
| 16185 | if (read_array_order (die, cu) == DW_ORD_col_major) |
| 16186 | { |
| 16187 | int i = 0; |
| 16188 | |
| 16189 | while (i < range_types.size ()) |
| 16190 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
| 16191 | byte_stride_prop, bit_stride); |
| 16192 | } |
| 16193 | else |
| 16194 | { |
| 16195 | size_t ndim = range_types.size (); |
| 16196 | while (ndim-- > 0) |
| 16197 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
| 16198 | byte_stride_prop, bit_stride); |
| 16199 | } |
| 16200 | |
| 16201 | /* Understand Dwarf2 support for vector types (like they occur on |
| 16202 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the |
| 16203 | array type. This is not part of the Dwarf2/3 standard yet, but a |
| 16204 | custom vendor extension. The main difference between a regular |
| 16205 | array and the vector variant is that vectors are passed by value |
| 16206 | to functions. */ |
| 16207 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
| 16208 | if (attr != nullptr) |
| 16209 | make_vector_type (type); |
| 16210 | |
| 16211 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
| 16212 | implementation may choose to implement triple vectors using this |
| 16213 | attribute. */ |
| 16214 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16215 | if (attr != nullptr) |
| 16216 | { |
| 16217 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) |
| 16218 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 16219 | else |
| 16220 | complaint (_("DW_AT_byte_size for array type smaller " |
| 16221 | "than the total size of elements")); |
| 16222 | } |
| 16223 | |
| 16224 | name = dwarf2_name (die, cu); |
| 16225 | if (name) |
| 16226 | type->set_name (name); |
| 16227 | |
| 16228 | maybe_set_alignment (cu, die, type); |
| 16229 | |
| 16230 | /* Install the type in the die. */ |
| 16231 | set_die_type (die, type, cu); |
| 16232 | |
| 16233 | /* set_die_type should be already done. */ |
| 16234 | set_descriptive_type (type, die, cu); |
| 16235 | |
| 16236 | return type; |
| 16237 | } |
| 16238 | |
| 16239 | static enum dwarf_array_dim_ordering |
| 16240 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
| 16241 | { |
| 16242 | struct attribute *attr; |
| 16243 | |
| 16244 | attr = dwarf2_attr (die, DW_AT_ordering, cu); |
| 16245 | |
| 16246 | if (attr != nullptr) |
| 16247 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
| 16248 | |
| 16249 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
| 16250 | opposite order to the dwarf2 specification, but data is still |
| 16251 | laid out as per normal fortran. |
| 16252 | |
| 16253 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
| 16254 | version checking. */ |
| 16255 | |
| 16256 | if (cu->language == language_fortran |
| 16257 | && cu->producer && strstr (cu->producer, "GNU F77")) |
| 16258 | { |
| 16259 | return DW_ORD_row_major; |
| 16260 | } |
| 16261 | |
| 16262 | switch (cu->language_defn->la_array_ordering) |
| 16263 | { |
| 16264 | case array_column_major: |
| 16265 | return DW_ORD_col_major; |
| 16266 | case array_row_major: |
| 16267 | default: |
| 16268 | return DW_ORD_row_major; |
| 16269 | }; |
| 16270 | } |
| 16271 | |
| 16272 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
| 16273 | the DIE's type field. */ |
| 16274 | |
| 16275 | static struct type * |
| 16276 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16277 | { |
| 16278 | struct type *domain_type, *set_type; |
| 16279 | struct attribute *attr; |
| 16280 | |
| 16281 | domain_type = die_type (die, cu); |
| 16282 | |
| 16283 | /* The die_type call above may have already set the type for this DIE. */ |
| 16284 | set_type = get_die_type (die, cu); |
| 16285 | if (set_type) |
| 16286 | return set_type; |
| 16287 | |
| 16288 | set_type = create_set_type (NULL, domain_type); |
| 16289 | |
| 16290 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16291 | if (attr != nullptr) |
| 16292 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
| 16293 | |
| 16294 | maybe_set_alignment (cu, die, set_type); |
| 16295 | |
| 16296 | return set_die_type (die, set_type, cu); |
| 16297 | } |
| 16298 | |
| 16299 | /* A helper for read_common_block that creates a locexpr baton. |
| 16300 | SYM is the symbol which we are marking as computed. |
| 16301 | COMMON_DIE is the DIE for the common block. |
| 16302 | COMMON_LOC is the location expression attribute for the common |
| 16303 | block itself. |
| 16304 | MEMBER_LOC is the location expression attribute for the particular |
| 16305 | member of the common block that we are processing. |
| 16306 | CU is the CU from which the above come. */ |
| 16307 | |
| 16308 | static void |
| 16309 | mark_common_block_symbol_computed (struct symbol *sym, |
| 16310 | struct die_info *common_die, |
| 16311 | struct attribute *common_loc, |
| 16312 | struct attribute *member_loc, |
| 16313 | struct dwarf2_cu *cu) |
| 16314 | { |
| 16315 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 16316 | = cu->per_cu->dwarf2_per_objfile; |
| 16317 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 16318 | struct dwarf2_locexpr_baton *baton; |
| 16319 | gdb_byte *ptr; |
| 16320 | unsigned int cu_off; |
| 16321 | enum bfd_endian byte_order = gdbarch_byte_order (objfile->arch ()); |
| 16322 | LONGEST offset = 0; |
| 16323 | |
| 16324 | gdb_assert (common_loc && member_loc); |
| 16325 | gdb_assert (common_loc->form_is_block ()); |
| 16326 | gdb_assert (member_loc->form_is_block () |
| 16327 | || member_loc->form_is_constant ()); |
| 16328 | |
| 16329 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 16330 | baton->per_cu = cu->per_cu; |
| 16331 | gdb_assert (baton->per_cu); |
| 16332 | |
| 16333 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; |
| 16334 | |
| 16335 | if (member_loc->form_is_constant ()) |
| 16336 | { |
| 16337 | offset = member_loc->constant_value (0); |
| 16338 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; |
| 16339 | } |
| 16340 | else |
| 16341 | baton->size += DW_BLOCK (member_loc)->size; |
| 16342 | |
| 16343 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
| 16344 | baton->data = ptr; |
| 16345 | |
| 16346 | *ptr++ = DW_OP_call4; |
| 16347 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
| 16348 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
| 16349 | ptr += 4; |
| 16350 | |
| 16351 | if (member_loc->form_is_constant ()) |
| 16352 | { |
| 16353 | *ptr++ = DW_OP_addr; |
| 16354 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); |
| 16355 | ptr += cu->header.addr_size; |
| 16356 | } |
| 16357 | else |
| 16358 | { |
| 16359 | /* We have to copy the data here, because DW_OP_call4 will only |
| 16360 | use a DW_AT_location attribute. */ |
| 16361 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); |
| 16362 | ptr += DW_BLOCK (member_loc)->size; |
| 16363 | } |
| 16364 | |
| 16365 | *ptr++ = DW_OP_plus; |
| 16366 | gdb_assert (ptr - baton->data == baton->size); |
| 16367 | |
| 16368 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 16369 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
| 16370 | } |
| 16371 | |
| 16372 | /* Create appropriate locally-scoped variables for all the |
| 16373 | DW_TAG_common_block entries. Also create a struct common_block |
| 16374 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN |
| 16375 | is used to separate the common blocks name namespace from regular |
| 16376 | variable names. */ |
| 16377 | |
| 16378 | static void |
| 16379 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
| 16380 | { |
| 16381 | struct attribute *attr; |
| 16382 | |
| 16383 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 16384 | if (attr != nullptr) |
| 16385 | { |
| 16386 | /* Support the .debug_loc offsets. */ |
| 16387 | if (attr->form_is_block ()) |
| 16388 | { |
| 16389 | /* Ok. */ |
| 16390 | } |
| 16391 | else if (attr->form_is_section_offset ()) |
| 16392 | { |
| 16393 | dwarf2_complex_location_expr_complaint (); |
| 16394 | attr = NULL; |
| 16395 | } |
| 16396 | else |
| 16397 | { |
| 16398 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 16399 | "common block member"); |
| 16400 | attr = NULL; |
| 16401 | } |
| 16402 | } |
| 16403 | |
| 16404 | if (die->child != NULL) |
| 16405 | { |
| 16406 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16407 | struct die_info *child_die; |
| 16408 | size_t n_entries = 0, size; |
| 16409 | struct common_block *common_block; |
| 16410 | struct symbol *sym; |
| 16411 | |
| 16412 | for (child_die = die->child; |
| 16413 | child_die && child_die->tag; |
| 16414 | child_die = child_die->sibling) |
| 16415 | ++n_entries; |
| 16416 | |
| 16417 | size = (sizeof (struct common_block) |
| 16418 | + (n_entries - 1) * sizeof (struct symbol *)); |
| 16419 | common_block |
| 16420 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, |
| 16421 | size); |
| 16422 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
| 16423 | common_block->n_entries = 0; |
| 16424 | |
| 16425 | for (child_die = die->child; |
| 16426 | child_die && child_die->tag; |
| 16427 | child_die = child_die->sibling) |
| 16428 | { |
| 16429 | /* Create the symbol in the DW_TAG_common_block block in the current |
| 16430 | symbol scope. */ |
| 16431 | sym = new_symbol (child_die, NULL, cu); |
| 16432 | if (sym != NULL) |
| 16433 | { |
| 16434 | struct attribute *member_loc; |
| 16435 | |
| 16436 | common_block->contents[common_block->n_entries++] = sym; |
| 16437 | |
| 16438 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, |
| 16439 | cu); |
| 16440 | if (member_loc) |
| 16441 | { |
| 16442 | /* GDB has handled this for a long time, but it is |
| 16443 | not specified by DWARF. It seems to have been |
| 16444 | emitted by gfortran at least as recently as: |
| 16445 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ |
| 16446 | complaint (_("Variable in common block has " |
| 16447 | "DW_AT_data_member_location " |
| 16448 | "- DIE at %s [in module %s]"), |
| 16449 | sect_offset_str (child_die->sect_off), |
| 16450 | objfile_name (objfile)); |
| 16451 | |
| 16452 | if (member_loc->form_is_section_offset ()) |
| 16453 | dwarf2_complex_location_expr_complaint (); |
| 16454 | else if (member_loc->form_is_constant () |
| 16455 | || member_loc->form_is_block ()) |
| 16456 | { |
| 16457 | if (attr != nullptr) |
| 16458 | mark_common_block_symbol_computed (sym, die, attr, |
| 16459 | member_loc, cu); |
| 16460 | } |
| 16461 | else |
| 16462 | dwarf2_complex_location_expr_complaint (); |
| 16463 | } |
| 16464 | } |
| 16465 | } |
| 16466 | |
| 16467 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); |
| 16468 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; |
| 16469 | } |
| 16470 | } |
| 16471 | |
| 16472 | /* Create a type for a C++ namespace. */ |
| 16473 | |
| 16474 | static struct type * |
| 16475 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16476 | { |
| 16477 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16478 | const char *previous_prefix, *name; |
| 16479 | int is_anonymous; |
| 16480 | struct type *type; |
| 16481 | |
| 16482 | /* For extensions, reuse the type of the original namespace. */ |
| 16483 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) |
| 16484 | { |
| 16485 | struct die_info *ext_die; |
| 16486 | struct dwarf2_cu *ext_cu = cu; |
| 16487 | |
| 16488 | ext_die = dwarf2_extension (die, &ext_cu); |
| 16489 | type = read_type_die (ext_die, ext_cu); |
| 16490 | |
| 16491 | /* EXT_CU may not be the same as CU. |
| 16492 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 16493 | return set_die_type (die, type, cu); |
| 16494 | } |
| 16495 | |
| 16496 | name = namespace_name (die, &is_anonymous, cu); |
| 16497 | |
| 16498 | /* Now build the name of the current namespace. */ |
| 16499 | |
| 16500 | previous_prefix = determine_prefix (die, cu); |
| 16501 | if (previous_prefix[0] != '\0') |
| 16502 | name = typename_concat (&objfile->objfile_obstack, |
| 16503 | previous_prefix, name, 0, cu); |
| 16504 | |
| 16505 | /* Create the type. */ |
| 16506 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
| 16507 | |
| 16508 | return set_die_type (die, type, cu); |
| 16509 | } |
| 16510 | |
| 16511 | /* Read a namespace scope. */ |
| 16512 | |
| 16513 | static void |
| 16514 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) |
| 16515 | { |
| 16516 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16517 | int is_anonymous; |
| 16518 | |
| 16519 | /* Add a symbol associated to this if we haven't seen the namespace |
| 16520 | before. Also, add a using directive if it's an anonymous |
| 16521 | namespace. */ |
| 16522 | |
| 16523 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
| 16524 | { |
| 16525 | struct type *type; |
| 16526 | |
| 16527 | type = read_type_die (die, cu); |
| 16528 | new_symbol (die, type, cu); |
| 16529 | |
| 16530 | namespace_name (die, &is_anonymous, cu); |
| 16531 | if (is_anonymous) |
| 16532 | { |
| 16533 | const char *previous_prefix = determine_prefix (die, cu); |
| 16534 | |
| 16535 | std::vector<const char *> excludes; |
| 16536 | add_using_directive (using_directives (cu), |
| 16537 | previous_prefix, type->name (), NULL, |
| 16538 | NULL, excludes, 0, &objfile->objfile_obstack); |
| 16539 | } |
| 16540 | } |
| 16541 | |
| 16542 | if (die->child != NULL) |
| 16543 | { |
| 16544 | struct die_info *child_die = die->child; |
| 16545 | |
| 16546 | while (child_die && child_die->tag) |
| 16547 | { |
| 16548 | process_die (child_die, cu); |
| 16549 | child_die = child_die->sibling; |
| 16550 | } |
| 16551 | } |
| 16552 | } |
| 16553 | |
| 16554 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
| 16555 | imported module. Still we need that type as local Fortran "use ... only" |
| 16556 | declaration imports depend on the created type in determine_prefix. */ |
| 16557 | |
| 16558 | static struct type * |
| 16559 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16560 | { |
| 16561 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16562 | const char *module_name; |
| 16563 | struct type *type; |
| 16564 | |
| 16565 | module_name = dwarf2_name (die, cu); |
| 16566 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
| 16567 | |
| 16568 | return set_die_type (die, type, cu); |
| 16569 | } |
| 16570 | |
| 16571 | /* Read a Fortran module. */ |
| 16572 | |
| 16573 | static void |
| 16574 | read_module (struct die_info *die, struct dwarf2_cu *cu) |
| 16575 | { |
| 16576 | struct die_info *child_die = die->child; |
| 16577 | struct type *type; |
| 16578 | |
| 16579 | type = read_type_die (die, cu); |
| 16580 | new_symbol (die, type, cu); |
| 16581 | |
| 16582 | while (child_die && child_die->tag) |
| 16583 | { |
| 16584 | process_die (child_die, cu); |
| 16585 | child_die = child_die->sibling; |
| 16586 | } |
| 16587 | } |
| 16588 | |
| 16589 | /* Return the name of the namespace represented by DIE. Set |
| 16590 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous |
| 16591 | namespace. */ |
| 16592 | |
| 16593 | static const char * |
| 16594 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
| 16595 | { |
| 16596 | struct die_info *current_die; |
| 16597 | const char *name = NULL; |
| 16598 | |
| 16599 | /* Loop through the extensions until we find a name. */ |
| 16600 | |
| 16601 | for (current_die = die; |
| 16602 | current_die != NULL; |
| 16603 | current_die = dwarf2_extension (die, &cu)) |
| 16604 | { |
| 16605 | /* We don't use dwarf2_name here so that we can detect the absence |
| 16606 | of a name -> anonymous namespace. */ |
| 16607 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
| 16608 | |
| 16609 | if (name != NULL) |
| 16610 | break; |
| 16611 | } |
| 16612 | |
| 16613 | /* Is it an anonymous namespace? */ |
| 16614 | |
| 16615 | *is_anonymous = (name == NULL); |
| 16616 | if (*is_anonymous) |
| 16617 | name = CP_ANONYMOUS_NAMESPACE_STR; |
| 16618 | |
| 16619 | return name; |
| 16620 | } |
| 16621 | |
| 16622 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
| 16623 | the user defined type vector. */ |
| 16624 | |
| 16625 | static struct type * |
| 16626 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16627 | { |
| 16628 | struct gdbarch *gdbarch |
| 16629 | = cu->per_cu->dwarf2_per_objfile->objfile->arch (); |
| 16630 | struct comp_unit_head *cu_header = &cu->header; |
| 16631 | struct type *type; |
| 16632 | struct attribute *attr_byte_size; |
| 16633 | struct attribute *attr_address_class; |
| 16634 | int byte_size, addr_class; |
| 16635 | struct type *target_type; |
| 16636 | |
| 16637 | target_type = die_type (die, cu); |
| 16638 | |
| 16639 | /* The die_type call above may have already set the type for this DIE. */ |
| 16640 | type = get_die_type (die, cu); |
| 16641 | if (type) |
| 16642 | return type; |
| 16643 | |
| 16644 | type = lookup_pointer_type (target_type); |
| 16645 | |
| 16646 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16647 | if (attr_byte_size) |
| 16648 | byte_size = DW_UNSND (attr_byte_size); |
| 16649 | else |
| 16650 | byte_size = cu_header->addr_size; |
| 16651 | |
| 16652 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
| 16653 | if (attr_address_class) |
| 16654 | addr_class = DW_UNSND (attr_address_class); |
| 16655 | else |
| 16656 | addr_class = DW_ADDR_none; |
| 16657 | |
| 16658 | ULONGEST alignment = get_alignment (cu, die); |
| 16659 | |
| 16660 | /* If the pointer size, alignment, or address class is different |
| 16661 | than the default, create a type variant marked as such and set |
| 16662 | the length accordingly. */ |
| 16663 | if (TYPE_LENGTH (type) != byte_size |
| 16664 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 |
| 16665 | && alignment != TYPE_RAW_ALIGN (type)) |
| 16666 | || addr_class != DW_ADDR_none) |
| 16667 | { |
| 16668 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
| 16669 | { |
| 16670 | int type_flags; |
| 16671 | |
| 16672 | type_flags = gdbarch_address_class_type_flags |
| 16673 | (gdbarch, byte_size, addr_class); |
| 16674 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
| 16675 | == 0); |
| 16676 | type = make_type_with_address_space (type, type_flags); |
| 16677 | } |
| 16678 | else if (TYPE_LENGTH (type) != byte_size) |
| 16679 | { |
| 16680 | complaint (_("invalid pointer size %d"), byte_size); |
| 16681 | } |
| 16682 | else if (TYPE_RAW_ALIGN (type) != alignment) |
| 16683 | { |
| 16684 | complaint (_("Invalid DW_AT_alignment" |
| 16685 | " - DIE at %s [in module %s]"), |
| 16686 | sect_offset_str (die->sect_off), |
| 16687 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 16688 | } |
| 16689 | else |
| 16690 | { |
| 16691 | /* Should we also complain about unhandled address classes? */ |
| 16692 | } |
| 16693 | } |
| 16694 | |
| 16695 | TYPE_LENGTH (type) = byte_size; |
| 16696 | set_type_align (type, alignment); |
| 16697 | return set_die_type (die, type, cu); |
| 16698 | } |
| 16699 | |
| 16700 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to |
| 16701 | the user defined type vector. */ |
| 16702 | |
| 16703 | static struct type * |
| 16704 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16705 | { |
| 16706 | struct type *type; |
| 16707 | struct type *to_type; |
| 16708 | struct type *domain; |
| 16709 | |
| 16710 | to_type = die_type (die, cu); |
| 16711 | domain = die_containing_type (die, cu); |
| 16712 | |
| 16713 | /* The calls above may have already set the type for this DIE. */ |
| 16714 | type = get_die_type (die, cu); |
| 16715 | if (type) |
| 16716 | return type; |
| 16717 | |
| 16718 | if (check_typedef (to_type)->code () == TYPE_CODE_METHOD) |
| 16719 | type = lookup_methodptr_type (to_type); |
| 16720 | else if (check_typedef (to_type)->code () == TYPE_CODE_FUNC) |
| 16721 | { |
| 16722 | struct type *new_type |
| 16723 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); |
| 16724 | |
| 16725 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), |
| 16726 | to_type->fields (), to_type->num_fields (), |
| 16727 | TYPE_VARARGS (to_type)); |
| 16728 | type = lookup_methodptr_type (new_type); |
| 16729 | } |
| 16730 | else |
| 16731 | type = lookup_memberptr_type (to_type, domain); |
| 16732 | |
| 16733 | return set_die_type (die, type, cu); |
| 16734 | } |
| 16735 | |
| 16736 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
| 16737 | the user defined type vector. */ |
| 16738 | |
| 16739 | static struct type * |
| 16740 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
| 16741 | enum type_code refcode) |
| 16742 | { |
| 16743 | struct comp_unit_head *cu_header = &cu->header; |
| 16744 | struct type *type, *target_type; |
| 16745 | struct attribute *attr; |
| 16746 | |
| 16747 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
| 16748 | |
| 16749 | target_type = die_type (die, cu); |
| 16750 | |
| 16751 | /* The die_type call above may have already set the type for this DIE. */ |
| 16752 | type = get_die_type (die, cu); |
| 16753 | if (type) |
| 16754 | return type; |
| 16755 | |
| 16756 | type = lookup_reference_type (target_type, refcode); |
| 16757 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16758 | if (attr != nullptr) |
| 16759 | { |
| 16760 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 16761 | } |
| 16762 | else |
| 16763 | { |
| 16764 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 16765 | } |
| 16766 | maybe_set_alignment (cu, die, type); |
| 16767 | return set_die_type (die, type, cu); |
| 16768 | } |
| 16769 | |
| 16770 | /* Add the given cv-qualifiers to the element type of the array. GCC |
| 16771 | outputs DWARF type qualifiers that apply to an array, not the |
| 16772 | element type. But GDB relies on the array element type to carry |
| 16773 | the cv-qualifiers. This mimics section 6.7.3 of the C99 |
| 16774 | specification. */ |
| 16775 | |
| 16776 | static struct type * |
| 16777 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, |
| 16778 | struct type *base_type, int cnst, int voltl) |
| 16779 | { |
| 16780 | struct type *el_type, *inner_array; |
| 16781 | |
| 16782 | base_type = copy_type (base_type); |
| 16783 | inner_array = base_type; |
| 16784 | |
| 16785 | while (TYPE_TARGET_TYPE (inner_array)->code () == TYPE_CODE_ARRAY) |
| 16786 | { |
| 16787 | TYPE_TARGET_TYPE (inner_array) = |
| 16788 | copy_type (TYPE_TARGET_TYPE (inner_array)); |
| 16789 | inner_array = TYPE_TARGET_TYPE (inner_array); |
| 16790 | } |
| 16791 | |
| 16792 | el_type = TYPE_TARGET_TYPE (inner_array); |
| 16793 | cnst |= TYPE_CONST (el_type); |
| 16794 | voltl |= TYPE_VOLATILE (el_type); |
| 16795 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); |
| 16796 | |
| 16797 | return set_die_type (die, base_type, cu); |
| 16798 | } |
| 16799 | |
| 16800 | static struct type * |
| 16801 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16802 | { |
| 16803 | struct type *base_type, *cv_type; |
| 16804 | |
| 16805 | base_type = die_type (die, cu); |
| 16806 | |
| 16807 | /* The die_type call above may have already set the type for this DIE. */ |
| 16808 | cv_type = get_die_type (die, cu); |
| 16809 | if (cv_type) |
| 16810 | return cv_type; |
| 16811 | |
| 16812 | /* In case the const qualifier is applied to an array type, the element type |
| 16813 | is so qualified, not the array type (section 6.7.3 of C99). */ |
| 16814 | if (base_type->code () == TYPE_CODE_ARRAY) |
| 16815 | return add_array_cv_type (die, cu, base_type, 1, 0); |
| 16816 | |
| 16817 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
| 16818 | return set_die_type (die, cv_type, cu); |
| 16819 | } |
| 16820 | |
| 16821 | static struct type * |
| 16822 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16823 | { |
| 16824 | struct type *base_type, *cv_type; |
| 16825 | |
| 16826 | base_type = die_type (die, cu); |
| 16827 | |
| 16828 | /* The die_type call above may have already set the type for this DIE. */ |
| 16829 | cv_type = get_die_type (die, cu); |
| 16830 | if (cv_type) |
| 16831 | return cv_type; |
| 16832 | |
| 16833 | /* In case the volatile qualifier is applied to an array type, the |
| 16834 | element type is so qualified, not the array type (section 6.7.3 |
| 16835 | of C99). */ |
| 16836 | if (base_type->code () == TYPE_CODE_ARRAY) |
| 16837 | return add_array_cv_type (die, cu, base_type, 0, 1); |
| 16838 | |
| 16839 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
| 16840 | return set_die_type (die, cv_type, cu); |
| 16841 | } |
| 16842 | |
| 16843 | /* Handle DW_TAG_restrict_type. */ |
| 16844 | |
| 16845 | static struct type * |
| 16846 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16847 | { |
| 16848 | struct type *base_type, *cv_type; |
| 16849 | |
| 16850 | base_type = die_type (die, cu); |
| 16851 | |
| 16852 | /* The die_type call above may have already set the type for this DIE. */ |
| 16853 | cv_type = get_die_type (die, cu); |
| 16854 | if (cv_type) |
| 16855 | return cv_type; |
| 16856 | |
| 16857 | cv_type = make_restrict_type (base_type); |
| 16858 | return set_die_type (die, cv_type, cu); |
| 16859 | } |
| 16860 | |
| 16861 | /* Handle DW_TAG_atomic_type. */ |
| 16862 | |
| 16863 | static struct type * |
| 16864 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16865 | { |
| 16866 | struct type *base_type, *cv_type; |
| 16867 | |
| 16868 | base_type = die_type (die, cu); |
| 16869 | |
| 16870 | /* The die_type call above may have already set the type for this DIE. */ |
| 16871 | cv_type = get_die_type (die, cu); |
| 16872 | if (cv_type) |
| 16873 | return cv_type; |
| 16874 | |
| 16875 | cv_type = make_atomic_type (base_type); |
| 16876 | return set_die_type (die, cv_type, cu); |
| 16877 | } |
| 16878 | |
| 16879 | /* Extract all information from a DW_TAG_string_type DIE and add to |
| 16880 | the user defined type vector. It isn't really a user defined type, |
| 16881 | but it behaves like one, with other DIE's using an AT_user_def_type |
| 16882 | attribute to reference it. */ |
| 16883 | |
| 16884 | static struct type * |
| 16885 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16886 | { |
| 16887 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16888 | struct gdbarch *gdbarch = objfile->arch (); |
| 16889 | struct type *type, *range_type, *index_type, *char_type; |
| 16890 | struct attribute *attr; |
| 16891 | struct dynamic_prop prop; |
| 16892 | bool length_is_constant = true; |
| 16893 | LONGEST length; |
| 16894 | |
| 16895 | /* There are a couple of places where bit sizes might be made use of |
| 16896 | when parsing a DW_TAG_string_type, however, no producer that we know |
| 16897 | of make use of these. Handling bit sizes that are a multiple of the |
| 16898 | byte size is easy enough, but what about other bit sizes? Lets deal |
| 16899 | with that problem when we have to. Warn about these attributes being |
| 16900 | unsupported, then parse the type and ignore them like we always |
| 16901 | have. */ |
| 16902 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr |
| 16903 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) |
| 16904 | { |
| 16905 | static bool warning_printed = false; |
| 16906 | if (!warning_printed) |
| 16907 | { |
| 16908 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " |
| 16909 | "currently supported on DW_TAG_string_type.")); |
| 16910 | warning_printed = true; |
| 16911 | } |
| 16912 | } |
| 16913 | |
| 16914 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
| 16915 | if (attr != nullptr && !attr->form_is_constant ()) |
| 16916 | { |
| 16917 | /* The string length describes the location at which the length of |
| 16918 | the string can be found. The size of the length field can be |
| 16919 | specified with one of the attributes below. */ |
| 16920 | struct type *prop_type; |
| 16921 | struct attribute *len |
| 16922 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); |
| 16923 | if (len == nullptr) |
| 16924 | len = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16925 | if (len != nullptr && len->form_is_constant ()) |
| 16926 | { |
| 16927 | /* Pass 0 as the default as we know this attribute is constant |
| 16928 | and the default value will not be returned. */ |
| 16929 | LONGEST sz = len->constant_value (0); |
| 16930 | prop_type = cu->per_cu->int_type (sz, true); |
| 16931 | } |
| 16932 | else |
| 16933 | { |
| 16934 | /* If the size is not specified then we assume it is the size of |
| 16935 | an address on this target. */ |
| 16936 | prop_type = cu->per_cu->addr_sized_int_type (true); |
| 16937 | } |
| 16938 | |
| 16939 | /* Convert the attribute into a dynamic property. */ |
| 16940 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
| 16941 | length = 1; |
| 16942 | else |
| 16943 | length_is_constant = false; |
| 16944 | } |
| 16945 | else if (attr != nullptr) |
| 16946 | { |
| 16947 | /* This DW_AT_string_length just contains the length with no |
| 16948 | indirection. There's no need to create a dynamic property in this |
| 16949 | case. Pass 0 for the default value as we know it will not be |
| 16950 | returned in this case. */ |
| 16951 | length = attr->constant_value (0); |
| 16952 | } |
| 16953 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) |
| 16954 | { |
| 16955 | /* We don't currently support non-constant byte sizes for strings. */ |
| 16956 | length = attr->constant_value (1); |
| 16957 | } |
| 16958 | else |
| 16959 | { |
| 16960 | /* Use 1 as a fallback length if we have nothing else. */ |
| 16961 | length = 1; |
| 16962 | } |
| 16963 | |
| 16964 | index_type = objfile_type (objfile)->builtin_int; |
| 16965 | if (length_is_constant) |
| 16966 | range_type = create_static_range_type (NULL, index_type, 1, length); |
| 16967 | else |
| 16968 | { |
| 16969 | struct dynamic_prop low_bound; |
| 16970 | |
| 16971 | low_bound.kind = PROP_CONST; |
| 16972 | low_bound.data.const_val = 1; |
| 16973 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); |
| 16974 | } |
| 16975 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
| 16976 | type = create_string_type (NULL, char_type, range_type); |
| 16977 | |
| 16978 | return set_die_type (die, type, cu); |
| 16979 | } |
| 16980 | |
| 16981 | /* Assuming that DIE corresponds to a function, returns nonzero |
| 16982 | if the function is prototyped. */ |
| 16983 | |
| 16984 | static int |
| 16985 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) |
| 16986 | { |
| 16987 | struct attribute *attr; |
| 16988 | |
| 16989 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
| 16990 | if (attr && (DW_UNSND (attr) != 0)) |
| 16991 | return 1; |
| 16992 | |
| 16993 | /* The DWARF standard implies that the DW_AT_prototyped attribute |
| 16994 | is only meaningful for C, but the concept also extends to other |
| 16995 | languages that allow unprototyped functions (Eg: Objective C). |
| 16996 | For all other languages, assume that functions are always |
| 16997 | prototyped. */ |
| 16998 | if (cu->language != language_c |
| 16999 | && cu->language != language_objc |
| 17000 | && cu->language != language_opencl) |
| 17001 | return 1; |
| 17002 | |
| 17003 | /* RealView does not emit DW_AT_prototyped. We can not distinguish |
| 17004 | prototyped and unprototyped functions; default to prototyped, |
| 17005 | since that is more common in modern code (and RealView warns |
| 17006 | about unprototyped functions). */ |
| 17007 | if (producer_is_realview (cu->producer)) |
| 17008 | return 1; |
| 17009 | |
| 17010 | return 0; |
| 17011 | } |
| 17012 | |
| 17013 | /* Handle DIES due to C code like: |
| 17014 | |
| 17015 | struct foo |
| 17016 | { |
| 17017 | int (*funcp)(int a, long l); |
| 17018 | int b; |
| 17019 | }; |
| 17020 | |
| 17021 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
| 17022 | |
| 17023 | static struct type * |
| 17024 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17025 | { |
| 17026 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17027 | struct type *type; /* Type that this function returns. */ |
| 17028 | struct type *ftype; /* Function that returns above type. */ |
| 17029 | struct attribute *attr; |
| 17030 | |
| 17031 | type = die_type (die, cu); |
| 17032 | |
| 17033 | /* The die_type call above may have already set the type for this DIE. */ |
| 17034 | ftype = get_die_type (die, cu); |
| 17035 | if (ftype) |
| 17036 | return ftype; |
| 17037 | |
| 17038 | ftype = lookup_function_type (type); |
| 17039 | |
| 17040 | if (prototyped_function_p (die, cu)) |
| 17041 | TYPE_PROTOTYPED (ftype) = 1; |
| 17042 | |
| 17043 | /* Store the calling convention in the type if it's available in |
| 17044 | the subroutine die. Otherwise set the calling convention to |
| 17045 | the default value DW_CC_normal. */ |
| 17046 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); |
| 17047 | if (attr != nullptr |
| 17048 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) |
| 17049 | TYPE_CALLING_CONVENTION (ftype) |
| 17050 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); |
| 17051 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
| 17052 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; |
| 17053 | else |
| 17054 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; |
| 17055 | |
| 17056 | /* Record whether the function returns normally to its caller or not |
| 17057 | if the DWARF producer set that information. */ |
| 17058 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); |
| 17059 | if (attr && (DW_UNSND (attr) != 0)) |
| 17060 | TYPE_NO_RETURN (ftype) = 1; |
| 17061 | |
| 17062 | /* We need to add the subroutine type to the die immediately so |
| 17063 | we don't infinitely recurse when dealing with parameters |
| 17064 | declared as the same subroutine type. */ |
| 17065 | set_die_type (die, ftype, cu); |
| 17066 | |
| 17067 | if (die->child != NULL) |
| 17068 | { |
| 17069 | struct type *void_type = objfile_type (objfile)->builtin_void; |
| 17070 | struct die_info *child_die; |
| 17071 | int nparams, iparams; |
| 17072 | |
| 17073 | /* Count the number of parameters. |
| 17074 | FIXME: GDB currently ignores vararg functions, but knows about |
| 17075 | vararg member functions. */ |
| 17076 | nparams = 0; |
| 17077 | child_die = die->child; |
| 17078 | while (child_die && child_die->tag) |
| 17079 | { |
| 17080 | if (child_die->tag == DW_TAG_formal_parameter) |
| 17081 | nparams++; |
| 17082 | else if (child_die->tag == DW_TAG_unspecified_parameters) |
| 17083 | TYPE_VARARGS (ftype) = 1; |
| 17084 | child_die = child_die->sibling; |
| 17085 | } |
| 17086 | |
| 17087 | /* Allocate storage for parameters and fill them in. */ |
| 17088 | ftype->set_num_fields (nparams); |
| 17089 | ftype->set_fields |
| 17090 | ((struct field *) TYPE_ZALLOC (ftype, nparams * sizeof (struct field))); |
| 17091 | |
| 17092 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
| 17093 | even if we error out during the parameters reading below. */ |
| 17094 | for (iparams = 0; iparams < nparams; iparams++) |
| 17095 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; |
| 17096 | |
| 17097 | iparams = 0; |
| 17098 | child_die = die->child; |
| 17099 | while (child_die && child_die->tag) |
| 17100 | { |
| 17101 | if (child_die->tag == DW_TAG_formal_parameter) |
| 17102 | { |
| 17103 | struct type *arg_type; |
| 17104 | |
| 17105 | /* DWARF version 2 has no clean way to discern C++ |
| 17106 | static and non-static member functions. G++ helps |
| 17107 | GDB by marking the first parameter for non-static |
| 17108 | member functions (which is the this pointer) as |
| 17109 | artificial. We pass this information to |
| 17110 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. |
| 17111 | |
| 17112 | DWARF version 3 added DW_AT_object_pointer, which GCC |
| 17113 | 4.5 does not yet generate. */ |
| 17114 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
| 17115 | if (attr != nullptr) |
| 17116 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
| 17117 | else |
| 17118 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 17119 | arg_type = die_type (child_die, cu); |
| 17120 | |
| 17121 | /* RealView does not mark THIS as const, which the testsuite |
| 17122 | expects. GCC marks THIS as const in method definitions, |
| 17123 | but not in the class specifications (GCC PR 43053). */ |
| 17124 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) |
| 17125 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) |
| 17126 | { |
| 17127 | int is_this = 0; |
| 17128 | struct dwarf2_cu *arg_cu = cu; |
| 17129 | const char *name = dwarf2_name (child_die, cu); |
| 17130 | |
| 17131 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); |
| 17132 | if (attr != nullptr) |
| 17133 | { |
| 17134 | /* If the compiler emits this, use it. */ |
| 17135 | if (follow_die_ref (die, attr, &arg_cu) == child_die) |
| 17136 | is_this = 1; |
| 17137 | } |
| 17138 | else if (name && strcmp (name, "this") == 0) |
| 17139 | /* Function definitions will have the argument names. */ |
| 17140 | is_this = 1; |
| 17141 | else if (name == NULL && iparams == 0) |
| 17142 | /* Declarations may not have the names, so like |
| 17143 | elsewhere in GDB, assume an artificial first |
| 17144 | argument is "this". */ |
| 17145 | is_this = 1; |
| 17146 | |
| 17147 | if (is_this) |
| 17148 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), |
| 17149 | arg_type, 0); |
| 17150 | } |
| 17151 | |
| 17152 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; |
| 17153 | iparams++; |
| 17154 | } |
| 17155 | child_die = child_die->sibling; |
| 17156 | } |
| 17157 | } |
| 17158 | |
| 17159 | return ftype; |
| 17160 | } |
| 17161 | |
| 17162 | static struct type * |
| 17163 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
| 17164 | { |
| 17165 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17166 | const char *name = NULL; |
| 17167 | struct type *this_type, *target_type; |
| 17168 | |
| 17169 | name = dwarf2_full_name (NULL, die, cu); |
| 17170 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
| 17171 | TYPE_TARGET_STUB (this_type) = 1; |
| 17172 | set_die_type (die, this_type, cu); |
| 17173 | target_type = die_type (die, cu); |
| 17174 | if (target_type != this_type) |
| 17175 | TYPE_TARGET_TYPE (this_type) = target_type; |
| 17176 | else |
| 17177 | { |
| 17178 | /* Self-referential typedefs are, it seems, not allowed by the DWARF |
| 17179 | spec and cause infinite loops in GDB. */ |
| 17180 | complaint (_("Self-referential DW_TAG_typedef " |
| 17181 | "- DIE at %s [in module %s]"), |
| 17182 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
| 17183 | TYPE_TARGET_TYPE (this_type) = NULL; |
| 17184 | } |
| 17185 | if (name == NULL) |
| 17186 | { |
| 17187 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates |
| 17188 | anonymous typedefs, which is, strictly speaking, invalid DWARF. |
| 17189 | Handle these by just returning the target type, rather than |
| 17190 | constructing an anonymous typedef type and trying to handle this |
| 17191 | elsewhere. */ |
| 17192 | set_die_type (die, target_type, cu); |
| 17193 | return target_type; |
| 17194 | } |
| 17195 | return this_type; |
| 17196 | } |
| 17197 | |
| 17198 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
| 17199 | (which may be different from NAME) to the architecture back-end to allow |
| 17200 | it to guess the correct format if necessary. */ |
| 17201 | |
| 17202 | static struct type * |
| 17203 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, |
| 17204 | const char *name_hint, enum bfd_endian byte_order) |
| 17205 | { |
| 17206 | struct gdbarch *gdbarch = objfile->arch (); |
| 17207 | const struct floatformat **format; |
| 17208 | struct type *type; |
| 17209 | |
| 17210 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); |
| 17211 | if (format) |
| 17212 | type = init_float_type (objfile, bits, name, format, byte_order); |
| 17213 | else |
| 17214 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
| 17215 | |
| 17216 | return type; |
| 17217 | } |
| 17218 | |
| 17219 | /* Allocate an integer type of size BITS and name NAME. */ |
| 17220 | |
| 17221 | static struct type * |
| 17222 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, |
| 17223 | int bits, int unsigned_p, const char *name) |
| 17224 | { |
| 17225 | struct type *type; |
| 17226 | |
| 17227 | /* Versions of Intel's C Compiler generate an integer type called "void" |
| 17228 | instead of using DW_TAG_unspecified_type. This has been seen on |
| 17229 | at least versions 14, 17, and 18. */ |
| 17230 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
| 17231 | && strcmp (name, "void") == 0) |
| 17232 | type = objfile_type (objfile)->builtin_void; |
| 17233 | else |
| 17234 | type = init_integer_type (objfile, bits, unsigned_p, name); |
| 17235 | |
| 17236 | return type; |
| 17237 | } |
| 17238 | |
| 17239 | /* Initialise and return a floating point type of size BITS suitable for |
| 17240 | use as a component of a complex number. The NAME_HINT is passed through |
| 17241 | when initialising the floating point type and is the name of the complex |
| 17242 | type. |
| 17243 | |
| 17244 | As DWARF doesn't currently provide an explicit name for the components |
| 17245 | of a complex number, but it can be helpful to have these components |
| 17246 | named, we try to select a suitable name based on the size of the |
| 17247 | component. */ |
| 17248 | static struct type * |
| 17249 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, |
| 17250 | struct objfile *objfile, |
| 17251 | int bits, const char *name_hint, |
| 17252 | enum bfd_endian byte_order) |
| 17253 | { |
| 17254 | gdbarch *gdbarch = objfile->arch (); |
| 17255 | struct type *tt = nullptr; |
| 17256 | |
| 17257 | /* Try to find a suitable floating point builtin type of size BITS. |
| 17258 | We're going to use the name of this type as the name for the complex |
| 17259 | target type that we are about to create. */ |
| 17260 | switch (cu->language) |
| 17261 | { |
| 17262 | case language_fortran: |
| 17263 | switch (bits) |
| 17264 | { |
| 17265 | case 32: |
| 17266 | tt = builtin_f_type (gdbarch)->builtin_real; |
| 17267 | break; |
| 17268 | case 64: |
| 17269 | tt = builtin_f_type (gdbarch)->builtin_real_s8; |
| 17270 | break; |
| 17271 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ |
| 17272 | case 128: |
| 17273 | tt = builtin_f_type (gdbarch)->builtin_real_s16; |
| 17274 | break; |
| 17275 | } |
| 17276 | break; |
| 17277 | default: |
| 17278 | switch (bits) |
| 17279 | { |
| 17280 | case 32: |
| 17281 | tt = builtin_type (gdbarch)->builtin_float; |
| 17282 | break; |
| 17283 | case 64: |
| 17284 | tt = builtin_type (gdbarch)->builtin_double; |
| 17285 | break; |
| 17286 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ |
| 17287 | case 128: |
| 17288 | tt = builtin_type (gdbarch)->builtin_long_double; |
| 17289 | break; |
| 17290 | } |
| 17291 | break; |
| 17292 | } |
| 17293 | |
| 17294 | /* If the type we found doesn't match the size we were looking for, then |
| 17295 | pretend we didn't find a type at all, the complex target type we |
| 17296 | create will then be nameless. */ |
| 17297 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
| 17298 | tt = nullptr; |
| 17299 | |
| 17300 | const char *name = (tt == nullptr) ? nullptr : tt->name (); |
| 17301 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
| 17302 | } |
| 17303 | |
| 17304 | /* Find a representation of a given base type and install |
| 17305 | it in the TYPE field of the die. */ |
| 17306 | |
| 17307 | static struct type * |
| 17308 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17309 | { |
| 17310 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17311 | struct type *type; |
| 17312 | struct attribute *attr; |
| 17313 | int encoding = 0, bits = 0; |
| 17314 | const char *name; |
| 17315 | gdbarch *arch; |
| 17316 | |
| 17317 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
| 17318 | if (attr != nullptr) |
| 17319 | encoding = DW_UNSND (attr); |
| 17320 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17321 | if (attr != nullptr) |
| 17322 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
| 17323 | name = dwarf2_name (die, cu); |
| 17324 | if (!name) |
| 17325 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
| 17326 | |
| 17327 | arch = objfile->arch (); |
| 17328 | enum bfd_endian byte_order = gdbarch_byte_order (arch); |
| 17329 | |
| 17330 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
| 17331 | if (attr) |
| 17332 | { |
| 17333 | int endianity = DW_UNSND (attr); |
| 17334 | |
| 17335 | switch (endianity) |
| 17336 | { |
| 17337 | case DW_END_big: |
| 17338 | byte_order = BFD_ENDIAN_BIG; |
| 17339 | break; |
| 17340 | case DW_END_little: |
| 17341 | byte_order = BFD_ENDIAN_LITTLE; |
| 17342 | break; |
| 17343 | default: |
| 17344 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); |
| 17345 | break; |
| 17346 | } |
| 17347 | } |
| 17348 | |
| 17349 | switch (encoding) |
| 17350 | { |
| 17351 | case DW_ATE_address: |
| 17352 | /* Turn DW_ATE_address into a void * pointer. */ |
| 17353 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
| 17354 | type = init_pointer_type (objfile, bits, name, type); |
| 17355 | break; |
| 17356 | case DW_ATE_boolean: |
| 17357 | type = init_boolean_type (objfile, bits, 1, name); |
| 17358 | break; |
| 17359 | case DW_ATE_complex_float: |
| 17360 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
| 17361 | byte_order); |
| 17362 | if (type->code () == TYPE_CODE_ERROR) |
| 17363 | { |
| 17364 | if (name == nullptr) |
| 17365 | { |
| 17366 | struct obstack *obstack |
| 17367 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; |
| 17368 | name = obconcat (obstack, "_Complex ", type->name (), |
| 17369 | nullptr); |
| 17370 | } |
| 17371 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
| 17372 | } |
| 17373 | else |
| 17374 | type = init_complex_type (name, type); |
| 17375 | break; |
| 17376 | case DW_ATE_decimal_float: |
| 17377 | type = init_decfloat_type (objfile, bits, name); |
| 17378 | break; |
| 17379 | case DW_ATE_float: |
| 17380 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
| 17381 | break; |
| 17382 | case DW_ATE_signed: |
| 17383 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
| 17384 | break; |
| 17385 | case DW_ATE_unsigned: |
| 17386 | if (cu->language == language_fortran |
| 17387 | && name |
| 17388 | && startswith (name, "character(")) |
| 17389 | type = init_character_type (objfile, bits, 1, name); |
| 17390 | else |
| 17391 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
| 17392 | break; |
| 17393 | case DW_ATE_signed_char: |
| 17394 | if (cu->language == language_ada || cu->language == language_m2 |
| 17395 | || cu->language == language_pascal |
| 17396 | || cu->language == language_fortran) |
| 17397 | type = init_character_type (objfile, bits, 0, name); |
| 17398 | else |
| 17399 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
| 17400 | break; |
| 17401 | case DW_ATE_unsigned_char: |
| 17402 | if (cu->language == language_ada || cu->language == language_m2 |
| 17403 | || cu->language == language_pascal |
| 17404 | || cu->language == language_fortran |
| 17405 | || cu->language == language_rust) |
| 17406 | type = init_character_type (objfile, bits, 1, name); |
| 17407 | else |
| 17408 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
| 17409 | break; |
| 17410 | case DW_ATE_UTF: |
| 17411 | { |
| 17412 | if (bits == 16) |
| 17413 | type = builtin_type (arch)->builtin_char16; |
| 17414 | else if (bits == 32) |
| 17415 | type = builtin_type (arch)->builtin_char32; |
| 17416 | else |
| 17417 | { |
| 17418 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
| 17419 | bits); |
| 17420 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
| 17421 | } |
| 17422 | return set_die_type (die, type, cu); |
| 17423 | } |
| 17424 | break; |
| 17425 | |
| 17426 | default: |
| 17427 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
| 17428 | dwarf_type_encoding_name (encoding)); |
| 17429 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
| 17430 | break; |
| 17431 | } |
| 17432 | |
| 17433 | if (name && strcmp (name, "char") == 0) |
| 17434 | TYPE_NOSIGN (type) = 1; |
| 17435 | |
| 17436 | maybe_set_alignment (cu, die, type); |
| 17437 | |
| 17438 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
| 17439 | |
| 17440 | return set_die_type (die, type, cu); |
| 17441 | } |
| 17442 | |
| 17443 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
| 17444 | resulting value of the attribute into struct bound_prop. |
| 17445 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ |
| 17446 | |
| 17447 | static int |
| 17448 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, |
| 17449 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
| 17450 | struct type *default_type) |
| 17451 | { |
| 17452 | struct dwarf2_property_baton *baton; |
| 17453 | struct obstack *obstack |
| 17454 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; |
| 17455 | |
| 17456 | gdb_assert (default_type != NULL); |
| 17457 | |
| 17458 | if (attr == NULL || prop == NULL) |
| 17459 | return 0; |
| 17460 | |
| 17461 | if (attr->form_is_block ()) |
| 17462 | { |
| 17463 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17464 | baton->property_type = default_type; |
| 17465 | baton->locexpr.per_cu = cu->per_cu; |
| 17466 | baton->locexpr.size = DW_BLOCK (attr)->size; |
| 17467 | baton->locexpr.data = DW_BLOCK (attr)->data; |
| 17468 | switch (attr->name) |
| 17469 | { |
| 17470 | case DW_AT_string_length: |
| 17471 | baton->locexpr.is_reference = true; |
| 17472 | break; |
| 17473 | default: |
| 17474 | baton->locexpr.is_reference = false; |
| 17475 | break; |
| 17476 | } |
| 17477 | prop->data.baton = baton; |
| 17478 | prop->kind = PROP_LOCEXPR; |
| 17479 | gdb_assert (prop->data.baton != NULL); |
| 17480 | } |
| 17481 | else if (attr->form_is_ref ()) |
| 17482 | { |
| 17483 | struct dwarf2_cu *target_cu = cu; |
| 17484 | struct die_info *target_die; |
| 17485 | struct attribute *target_attr; |
| 17486 | |
| 17487 | target_die = follow_die_ref (die, attr, &target_cu); |
| 17488 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); |
| 17489 | if (target_attr == NULL) |
| 17490 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, |
| 17491 | target_cu); |
| 17492 | if (target_attr == NULL) |
| 17493 | return 0; |
| 17494 | |
| 17495 | switch (target_attr->name) |
| 17496 | { |
| 17497 | case DW_AT_location: |
| 17498 | if (target_attr->form_is_section_offset ()) |
| 17499 | { |
| 17500 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17501 | baton->property_type = die_type (target_die, target_cu); |
| 17502 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
| 17503 | prop->data.baton = baton; |
| 17504 | prop->kind = PROP_LOCLIST; |
| 17505 | gdb_assert (prop->data.baton != NULL); |
| 17506 | } |
| 17507 | else if (target_attr->form_is_block ()) |
| 17508 | { |
| 17509 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17510 | baton->property_type = die_type (target_die, target_cu); |
| 17511 | baton->locexpr.per_cu = cu->per_cu; |
| 17512 | baton->locexpr.size = DW_BLOCK (target_attr)->size; |
| 17513 | baton->locexpr.data = DW_BLOCK (target_attr)->data; |
| 17514 | baton->locexpr.is_reference = true; |
| 17515 | prop->data.baton = baton; |
| 17516 | prop->kind = PROP_LOCEXPR; |
| 17517 | gdb_assert (prop->data.baton != NULL); |
| 17518 | } |
| 17519 | else |
| 17520 | { |
| 17521 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 17522 | "dynamic property"); |
| 17523 | return 0; |
| 17524 | } |
| 17525 | break; |
| 17526 | case DW_AT_data_member_location: |
| 17527 | { |
| 17528 | LONGEST offset; |
| 17529 | |
| 17530 | if (!handle_data_member_location (target_die, target_cu, |
| 17531 | &offset)) |
| 17532 | return 0; |
| 17533 | |
| 17534 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17535 | baton->property_type = read_type_die (target_die->parent, |
| 17536 | target_cu); |
| 17537 | baton->offset_info.offset = offset; |
| 17538 | baton->offset_info.type = die_type (target_die, target_cu); |
| 17539 | prop->data.baton = baton; |
| 17540 | prop->kind = PROP_ADDR_OFFSET; |
| 17541 | break; |
| 17542 | } |
| 17543 | } |
| 17544 | } |
| 17545 | else if (attr->form_is_constant ()) |
| 17546 | { |
| 17547 | prop->data.const_val = attr->constant_value (0); |
| 17548 | prop->kind = PROP_CONST; |
| 17549 | } |
| 17550 | else |
| 17551 | { |
| 17552 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), |
| 17553 | dwarf2_name (die, cu)); |
| 17554 | return 0; |
| 17555 | } |
| 17556 | |
| 17557 | return 1; |
| 17558 | } |
| 17559 | |
| 17560 | /* See read.h. */ |
| 17561 | |
| 17562 | struct type * |
| 17563 | dwarf2_per_cu_data::int_type (int size_in_bytes, bool unsigned_p) const |
| 17564 | { |
| 17565 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 17566 | struct type *int_type; |
| 17567 | |
| 17568 | /* Helper macro to examine the various builtin types. */ |
| 17569 | #define TRY_TYPE(F) \ |
| 17570 | int_type = (unsigned_p \ |
| 17571 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ |
| 17572 | : objfile_type (objfile)->builtin_ ## F); \ |
| 17573 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ |
| 17574 | return int_type |
| 17575 | |
| 17576 | TRY_TYPE (char); |
| 17577 | TRY_TYPE (short); |
| 17578 | TRY_TYPE (int); |
| 17579 | TRY_TYPE (long); |
| 17580 | TRY_TYPE (long_long); |
| 17581 | |
| 17582 | #undef TRY_TYPE |
| 17583 | |
| 17584 | gdb_assert_not_reached ("unable to find suitable integer type"); |
| 17585 | } |
| 17586 | |
| 17587 | /* See read.h. */ |
| 17588 | |
| 17589 | struct type * |
| 17590 | dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p) const |
| 17591 | { |
| 17592 | int addr_size = this->addr_size (); |
| 17593 | return int_type (addr_size, unsigned_p); |
| 17594 | } |
| 17595 | |
| 17596 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
| 17597 | present (which is valid) then compute the default type based on the |
| 17598 | compilation units address size. */ |
| 17599 | |
| 17600 | static struct type * |
| 17601 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17602 | { |
| 17603 | struct type *index_type = die_type (die, cu); |
| 17604 | |
| 17605 | /* Dwarf-2 specifications explicitly allows to create subrange types |
| 17606 | without specifying a base type. |
| 17607 | In that case, the base type must be set to the type of |
| 17608 | the lower bound, upper bound or count, in that order, if any of these |
| 17609 | three attributes references an object that has a type. |
| 17610 | If no base type is found, the Dwarf-2 specifications say that |
| 17611 | a signed integer type of size equal to the size of an address should |
| 17612 | be used. |
| 17613 | For the following C code: `extern char gdb_int [];' |
| 17614 | GCC produces an empty range DIE. |
| 17615 | FIXME: muller/2010-05-28: Possible references to object for low bound, |
| 17616 | high bound or count are not yet handled by this code. */ |
| 17617 | if (index_type->code () == TYPE_CODE_VOID) |
| 17618 | index_type = cu->per_cu->addr_sized_int_type (false); |
| 17619 | |
| 17620 | return index_type; |
| 17621 | } |
| 17622 | |
| 17623 | /* Read the given DW_AT_subrange DIE. */ |
| 17624 | |
| 17625 | static struct type * |
| 17626 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17627 | { |
| 17628 | struct type *base_type, *orig_base_type; |
| 17629 | struct type *range_type; |
| 17630 | struct attribute *attr; |
| 17631 | struct dynamic_prop low, high; |
| 17632 | int low_default_is_valid; |
| 17633 | int high_bound_is_count = 0; |
| 17634 | const char *name; |
| 17635 | ULONGEST negative_mask; |
| 17636 | |
| 17637 | orig_base_type = read_subrange_index_type (die, cu); |
| 17638 | |
| 17639 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
| 17640 | whereas the real type might be. So, we use ORIG_BASE_TYPE when |
| 17641 | creating the range type, but we use the result of check_typedef |
| 17642 | when examining properties of the type. */ |
| 17643 | base_type = check_typedef (orig_base_type); |
| 17644 | |
| 17645 | /* The die_type call above may have already set the type for this DIE. */ |
| 17646 | range_type = get_die_type (die, cu); |
| 17647 | if (range_type) |
| 17648 | return range_type; |
| 17649 | |
| 17650 | low.kind = PROP_CONST; |
| 17651 | high.kind = PROP_CONST; |
| 17652 | high.data.const_val = 0; |
| 17653 | |
| 17654 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
| 17655 | omitting DW_AT_lower_bound. */ |
| 17656 | switch (cu->language) |
| 17657 | { |
| 17658 | case language_c: |
| 17659 | case language_cplus: |
| 17660 | low.data.const_val = 0; |
| 17661 | low_default_is_valid = 1; |
| 17662 | break; |
| 17663 | case language_fortran: |
| 17664 | low.data.const_val = 1; |
| 17665 | low_default_is_valid = 1; |
| 17666 | break; |
| 17667 | case language_d: |
| 17668 | case language_objc: |
| 17669 | case language_rust: |
| 17670 | low.data.const_val = 0; |
| 17671 | low_default_is_valid = (cu->header.version >= 4); |
| 17672 | break; |
| 17673 | case language_ada: |
| 17674 | case language_m2: |
| 17675 | case language_pascal: |
| 17676 | low.data.const_val = 1; |
| 17677 | low_default_is_valid = (cu->header.version >= 4); |
| 17678 | break; |
| 17679 | default: |
| 17680 | low.data.const_val = 0; |
| 17681 | low_default_is_valid = 0; |
| 17682 | break; |
| 17683 | } |
| 17684 | |
| 17685 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
| 17686 | if (attr != nullptr) |
| 17687 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
| 17688 | else if (!low_default_is_valid) |
| 17689 | complaint (_("Missing DW_AT_lower_bound " |
| 17690 | "- DIE at %s [in module %s]"), |
| 17691 | sect_offset_str (die->sect_off), |
| 17692 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 17693 | |
| 17694 | struct attribute *attr_ub, *attr_count; |
| 17695 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); |
| 17696 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
| 17697 | { |
| 17698 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
| 17699 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
| 17700 | { |
| 17701 | /* If bounds are constant do the final calculation here. */ |
| 17702 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) |
| 17703 | high.data.const_val = low.data.const_val + high.data.const_val - 1; |
| 17704 | else |
| 17705 | high_bound_is_count = 1; |
| 17706 | } |
| 17707 | else |
| 17708 | { |
| 17709 | if (attr_ub != NULL) |
| 17710 | complaint (_("Unresolved DW_AT_upper_bound " |
| 17711 | "- DIE at %s [in module %s]"), |
| 17712 | sect_offset_str (die->sect_off), |
| 17713 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 17714 | if (attr_count != NULL) |
| 17715 | complaint (_("Unresolved DW_AT_count " |
| 17716 | "- DIE at %s [in module %s]"), |
| 17717 | sect_offset_str (die->sect_off), |
| 17718 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 17719 | } |
| 17720 | } |
| 17721 | |
| 17722 | LONGEST bias = 0; |
| 17723 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); |
| 17724 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
| 17725 | bias = bias_attr->constant_value (0); |
| 17726 | |
| 17727 | /* Normally, the DWARF producers are expected to use a signed |
| 17728 | constant form (Eg. DW_FORM_sdata) to express negative bounds. |
| 17729 | But this is unfortunately not always the case, as witnessed |
| 17730 | with GCC, for instance, where the ambiguous DW_FORM_dataN form |
| 17731 | is used instead. To work around that ambiguity, we treat |
| 17732 | the bounds as signed, and thus sign-extend their values, when |
| 17733 | the base type is signed. */ |
| 17734 | negative_mask = |
| 17735 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
| 17736 | if (low.kind == PROP_CONST |
| 17737 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) |
| 17738 | low.data.const_val |= negative_mask; |
| 17739 | if (high.kind == PROP_CONST |
| 17740 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) |
| 17741 | high.data.const_val |= negative_mask; |
| 17742 | |
| 17743 | /* Check for bit and byte strides. */ |
| 17744 | struct dynamic_prop byte_stride_prop; |
| 17745 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); |
| 17746 | if (attr_byte_stride != nullptr) |
| 17747 | { |
| 17748 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
| 17749 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
| 17750 | prop_type); |
| 17751 | } |
| 17752 | |
| 17753 | struct dynamic_prop bit_stride_prop; |
| 17754 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); |
| 17755 | if (attr_bit_stride != nullptr) |
| 17756 | { |
| 17757 | /* It only makes sense to have either a bit or byte stride. */ |
| 17758 | if (attr_byte_stride != nullptr) |
| 17759 | { |
| 17760 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " |
| 17761 | "- DIE at %s [in module %s]"), |
| 17762 | sect_offset_str (die->sect_off), |
| 17763 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 17764 | attr_bit_stride = nullptr; |
| 17765 | } |
| 17766 | else |
| 17767 | { |
| 17768 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
| 17769 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
| 17770 | prop_type); |
| 17771 | } |
| 17772 | } |
| 17773 | |
| 17774 | if (attr_byte_stride != nullptr |
| 17775 | || attr_bit_stride != nullptr) |
| 17776 | { |
| 17777 | bool byte_stride_p = (attr_byte_stride != nullptr); |
| 17778 | struct dynamic_prop *stride |
| 17779 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; |
| 17780 | |
| 17781 | range_type |
| 17782 | = create_range_type_with_stride (NULL, orig_base_type, &low, |
| 17783 | &high, bias, stride, byte_stride_p); |
| 17784 | } |
| 17785 | else |
| 17786 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); |
| 17787 | |
| 17788 | if (high_bound_is_count) |
| 17789 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; |
| 17790 | |
| 17791 | /* Ada expects an empty array on no boundary attributes. */ |
| 17792 | if (attr == NULL && cu->language != language_ada) |
| 17793 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
| 17794 | |
| 17795 | name = dwarf2_name (die, cu); |
| 17796 | if (name) |
| 17797 | range_type->set_name (name); |
| 17798 | |
| 17799 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17800 | if (attr != nullptr) |
| 17801 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
| 17802 | |
| 17803 | maybe_set_alignment (cu, die, range_type); |
| 17804 | |
| 17805 | set_die_type (die, range_type, cu); |
| 17806 | |
| 17807 | /* set_die_type should be already done. */ |
| 17808 | set_descriptive_type (range_type, die, cu); |
| 17809 | |
| 17810 | return range_type; |
| 17811 | } |
| 17812 | |
| 17813 | static struct type * |
| 17814 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17815 | { |
| 17816 | struct type *type; |
| 17817 | |
| 17818 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
| 17819 | NULL); |
| 17820 | type->set_name (dwarf2_name (die, cu)); |
| 17821 | |
| 17822 | /* In Ada, an unspecified type is typically used when the description |
| 17823 | of the type is deferred to a different unit. When encountering |
| 17824 | such a type, we treat it as a stub, and try to resolve it later on, |
| 17825 | when needed. */ |
| 17826 | if (cu->language == language_ada) |
| 17827 | TYPE_STUB (type) = 1; |
| 17828 | |
| 17829 | return set_die_type (die, type, cu); |
| 17830 | } |
| 17831 | |
| 17832 | /* Read a single die and all its descendents. Set the die's sibling |
| 17833 | field to NULL; set other fields in the die correctly, and set all |
| 17834 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the |
| 17835 | location of the info_ptr after reading all of those dies. PARENT |
| 17836 | is the parent of the die in question. */ |
| 17837 | |
| 17838 | static struct die_info * |
| 17839 | read_die_and_children (const struct die_reader_specs *reader, |
| 17840 | const gdb_byte *info_ptr, |
| 17841 | const gdb_byte **new_info_ptr, |
| 17842 | struct die_info *parent) |
| 17843 | { |
| 17844 | struct die_info *die; |
| 17845 | const gdb_byte *cur_ptr; |
| 17846 | |
| 17847 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
| 17848 | if (die == NULL) |
| 17849 | { |
| 17850 | *new_info_ptr = cur_ptr; |
| 17851 | return NULL; |
| 17852 | } |
| 17853 | store_in_ref_table (die, reader->cu); |
| 17854 | |
| 17855 | if (die->has_children) |
| 17856 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
| 17857 | else |
| 17858 | { |
| 17859 | die->child = NULL; |
| 17860 | *new_info_ptr = cur_ptr; |
| 17861 | } |
| 17862 | |
| 17863 | die->sibling = NULL; |
| 17864 | die->parent = parent; |
| 17865 | return die; |
| 17866 | } |
| 17867 | |
| 17868 | /* Read a die, all of its descendents, and all of its siblings; set |
| 17869 | all of the fields of all of the dies correctly. Arguments are as |
| 17870 | in read_die_and_children. */ |
| 17871 | |
| 17872 | static struct die_info * |
| 17873 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
| 17874 | const gdb_byte *info_ptr, |
| 17875 | const gdb_byte **new_info_ptr, |
| 17876 | struct die_info *parent) |
| 17877 | { |
| 17878 | struct die_info *first_die, *last_sibling; |
| 17879 | const gdb_byte *cur_ptr; |
| 17880 | |
| 17881 | cur_ptr = info_ptr; |
| 17882 | first_die = last_sibling = NULL; |
| 17883 | |
| 17884 | while (1) |
| 17885 | { |
| 17886 | struct die_info *die |
| 17887 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
| 17888 | |
| 17889 | if (die == NULL) |
| 17890 | { |
| 17891 | *new_info_ptr = cur_ptr; |
| 17892 | return first_die; |
| 17893 | } |
| 17894 | |
| 17895 | if (!first_die) |
| 17896 | first_die = die; |
| 17897 | else |
| 17898 | last_sibling->sibling = die; |
| 17899 | |
| 17900 | last_sibling = die; |
| 17901 | } |
| 17902 | } |
| 17903 | |
| 17904 | /* Read a die, all of its descendents, and all of its siblings; set |
| 17905 | all of the fields of all of the dies correctly. Arguments are as |
| 17906 | in read_die_and_children. |
| 17907 | This the main entry point for reading a DIE and all its children. */ |
| 17908 | |
| 17909 | static struct die_info * |
| 17910 | read_die_and_siblings (const struct die_reader_specs *reader, |
| 17911 | const gdb_byte *info_ptr, |
| 17912 | const gdb_byte **new_info_ptr, |
| 17913 | struct die_info *parent) |
| 17914 | { |
| 17915 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, |
| 17916 | new_info_ptr, parent); |
| 17917 | |
| 17918 | if (dwarf_die_debug) |
| 17919 | { |
| 17920 | fprintf_unfiltered (gdb_stdlog, |
| 17921 | "Read die from %s@0x%x of %s:\n", |
| 17922 | reader->die_section->get_name (), |
| 17923 | (unsigned) (info_ptr - reader->die_section->buffer), |
| 17924 | bfd_get_filename (reader->abfd)); |
| 17925 | dump_die (die, dwarf_die_debug); |
| 17926 | } |
| 17927 | |
| 17928 | return die; |
| 17929 | } |
| 17930 | |
| 17931 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
| 17932 | attributes. |
| 17933 | The caller is responsible for filling in the extra attributes |
| 17934 | and updating (*DIEP)->num_attrs. |
| 17935 | Set DIEP to point to a newly allocated die with its information, |
| 17936 | except for its child, sibling, and parent fields. */ |
| 17937 | |
| 17938 | static const gdb_byte * |
| 17939 | read_full_die_1 (const struct die_reader_specs *reader, |
| 17940 | struct die_info **diep, const gdb_byte *info_ptr, |
| 17941 | int num_extra_attrs) |
| 17942 | { |
| 17943 | unsigned int abbrev_number, bytes_read, i; |
| 17944 | struct abbrev_info *abbrev; |
| 17945 | struct die_info *die; |
| 17946 | struct dwarf2_cu *cu = reader->cu; |
| 17947 | bfd *abfd = reader->abfd; |
| 17948 | |
| 17949 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
| 17950 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 17951 | info_ptr += bytes_read; |
| 17952 | if (!abbrev_number) |
| 17953 | { |
| 17954 | *diep = NULL; |
| 17955 | return info_ptr; |
| 17956 | } |
| 17957 | |
| 17958 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
| 17959 | if (!abbrev) |
| 17960 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
| 17961 | abbrev_number, |
| 17962 | bfd_get_filename (abfd)); |
| 17963 | |
| 17964 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
| 17965 | die->sect_off = sect_off; |
| 17966 | die->tag = abbrev->tag; |
| 17967 | die->abbrev = abbrev_number; |
| 17968 | die->has_children = abbrev->has_children; |
| 17969 | |
| 17970 | /* Make the result usable. |
| 17971 | The caller needs to update num_attrs after adding the extra |
| 17972 | attributes. */ |
| 17973 | die->num_attrs = abbrev->num_attrs; |
| 17974 | |
| 17975 | std::vector<int> indexes_that_need_reprocess; |
| 17976 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 17977 | { |
| 17978 | bool need_reprocess; |
| 17979 | info_ptr = |
| 17980 | read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
| 17981 | info_ptr, &need_reprocess); |
| 17982 | if (need_reprocess) |
| 17983 | indexes_that_need_reprocess.push_back (i); |
| 17984 | } |
| 17985 | |
| 17986 | struct attribute *attr = die->attr (DW_AT_str_offsets_base); |
| 17987 | if (attr != nullptr) |
| 17988 | cu->str_offsets_base = DW_UNSND (attr); |
| 17989 | |
| 17990 | attr = die->attr (DW_AT_loclists_base); |
| 17991 | if (attr != nullptr) |
| 17992 | cu->loclist_base = DW_UNSND (attr); |
| 17993 | |
| 17994 | auto maybe_addr_base = die->addr_base (); |
| 17995 | if (maybe_addr_base.has_value ()) |
| 17996 | cu->addr_base = *maybe_addr_base; |
| 17997 | for (int index : indexes_that_need_reprocess) |
| 17998 | read_attribute_reprocess (reader, &die->attrs[index]); |
| 17999 | *diep = die; |
| 18000 | return info_ptr; |
| 18001 | } |
| 18002 | |
| 18003 | /* Read a die and all its attributes. |
| 18004 | Set DIEP to point to a newly allocated die with its information, |
| 18005 | except for its child, sibling, and parent fields. */ |
| 18006 | |
| 18007 | static const gdb_byte * |
| 18008 | read_full_die (const struct die_reader_specs *reader, |
| 18009 | struct die_info **diep, const gdb_byte *info_ptr) |
| 18010 | { |
| 18011 | const gdb_byte *result; |
| 18012 | |
| 18013 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
| 18014 | |
| 18015 | if (dwarf_die_debug) |
| 18016 | { |
| 18017 | fprintf_unfiltered (gdb_stdlog, |
| 18018 | "Read die from %s@0x%x of %s:\n", |
| 18019 | reader->die_section->get_name (), |
| 18020 | (unsigned) (info_ptr - reader->die_section->buffer), |
| 18021 | bfd_get_filename (reader->abfd)); |
| 18022 | dump_die (*diep, dwarf_die_debug); |
| 18023 | } |
| 18024 | |
| 18025 | return result; |
| 18026 | } |
| 18027 | \f |
| 18028 | |
| 18029 | /* Returns nonzero if TAG represents a type that we might generate a partial |
| 18030 | symbol for. */ |
| 18031 | |
| 18032 | static int |
| 18033 | is_type_tag_for_partial (int tag) |
| 18034 | { |
| 18035 | switch (tag) |
| 18036 | { |
| 18037 | #if 0 |
| 18038 | /* Some types that would be reasonable to generate partial symbols for, |
| 18039 | that we don't at present. */ |
| 18040 | case DW_TAG_array_type: |
| 18041 | case DW_TAG_file_type: |
| 18042 | case DW_TAG_ptr_to_member_type: |
| 18043 | case DW_TAG_set_type: |
| 18044 | case DW_TAG_string_type: |
| 18045 | case DW_TAG_subroutine_type: |
| 18046 | #endif |
| 18047 | case DW_TAG_base_type: |
| 18048 | case DW_TAG_class_type: |
| 18049 | case DW_TAG_interface_type: |
| 18050 | case DW_TAG_enumeration_type: |
| 18051 | case DW_TAG_structure_type: |
| 18052 | case DW_TAG_subrange_type: |
| 18053 | case DW_TAG_typedef: |
| 18054 | case DW_TAG_union_type: |
| 18055 | return 1; |
| 18056 | default: |
| 18057 | return 0; |
| 18058 | } |
| 18059 | } |
| 18060 | |
| 18061 | /* Load all DIEs that are interesting for partial symbols into memory. */ |
| 18062 | |
| 18063 | static struct partial_die_info * |
| 18064 | load_partial_dies (const struct die_reader_specs *reader, |
| 18065 | const gdb_byte *info_ptr, int building_psymtab) |
| 18066 | { |
| 18067 | struct dwarf2_cu *cu = reader->cu; |
| 18068 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18069 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
| 18070 | unsigned int bytes_read; |
| 18071 | unsigned int load_all = 0; |
| 18072 | int nesting_level = 1; |
| 18073 | |
| 18074 | parent_die = NULL; |
| 18075 | last_die = NULL; |
| 18076 | |
| 18077 | gdb_assert (cu->per_cu != NULL); |
| 18078 | if (cu->per_cu->load_all_dies) |
| 18079 | load_all = 1; |
| 18080 | |
| 18081 | cu->partial_dies |
| 18082 | = htab_create_alloc_ex (cu->header.length / 12, |
| 18083 | partial_die_hash, |
| 18084 | partial_die_eq, |
| 18085 | NULL, |
| 18086 | &cu->comp_unit_obstack, |
| 18087 | hashtab_obstack_allocate, |
| 18088 | dummy_obstack_deallocate); |
| 18089 | |
| 18090 | while (1) |
| 18091 | { |
| 18092 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
| 18093 | |
| 18094 | /* A NULL abbrev means the end of a series of children. */ |
| 18095 | if (abbrev == NULL) |
| 18096 | { |
| 18097 | if (--nesting_level == 0) |
| 18098 | return first_die; |
| 18099 | |
| 18100 | info_ptr += bytes_read; |
| 18101 | last_die = parent_die; |
| 18102 | parent_die = parent_die->die_parent; |
| 18103 | continue; |
| 18104 | } |
| 18105 | |
| 18106 | /* Check for template arguments. We never save these; if |
| 18107 | they're seen, we just mark the parent, and go on our way. */ |
| 18108 | if (parent_die != NULL |
| 18109 | && cu->language == language_cplus |
| 18110 | && (abbrev->tag == DW_TAG_template_type_param |
| 18111 | || abbrev->tag == DW_TAG_template_value_param)) |
| 18112 | { |
| 18113 | parent_die->has_template_arguments = 1; |
| 18114 | |
| 18115 | if (!load_all) |
| 18116 | { |
| 18117 | /* We don't need a partial DIE for the template argument. */ |
| 18118 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18119 | continue; |
| 18120 | } |
| 18121 | } |
| 18122 | |
| 18123 | /* We only recurse into c++ subprograms looking for template arguments. |
| 18124 | Skip their other children. */ |
| 18125 | if (!load_all |
| 18126 | && cu->language == language_cplus |
| 18127 | && parent_die != NULL |
| 18128 | && parent_die->tag == DW_TAG_subprogram) |
| 18129 | { |
| 18130 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18131 | continue; |
| 18132 | } |
| 18133 | |
| 18134 | /* Check whether this DIE is interesting enough to save. Normally |
| 18135 | we would not be interested in members here, but there may be |
| 18136 | later variables referencing them via DW_AT_specification (for |
| 18137 | static members). */ |
| 18138 | if (!load_all |
| 18139 | && !is_type_tag_for_partial (abbrev->tag) |
| 18140 | && abbrev->tag != DW_TAG_constant |
| 18141 | && abbrev->tag != DW_TAG_enumerator |
| 18142 | && abbrev->tag != DW_TAG_subprogram |
| 18143 | && abbrev->tag != DW_TAG_inlined_subroutine |
| 18144 | && abbrev->tag != DW_TAG_lexical_block |
| 18145 | && abbrev->tag != DW_TAG_variable |
| 18146 | && abbrev->tag != DW_TAG_namespace |
| 18147 | && abbrev->tag != DW_TAG_module |
| 18148 | && abbrev->tag != DW_TAG_member |
| 18149 | && abbrev->tag != DW_TAG_imported_unit |
| 18150 | && abbrev->tag != DW_TAG_imported_declaration) |
| 18151 | { |
| 18152 | /* Otherwise we skip to the next sibling, if any. */ |
| 18153 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18154 | continue; |
| 18155 | } |
| 18156 | |
| 18157 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
| 18158 | abbrev); |
| 18159 | |
| 18160 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
| 18161 | |
| 18162 | /* This two-pass algorithm for processing partial symbols has a |
| 18163 | high cost in cache pressure. Thus, handle some simple cases |
| 18164 | here which cover the majority of C partial symbols. DIEs |
| 18165 | which neither have specification tags in them, nor could have |
| 18166 | specification tags elsewhere pointing at them, can simply be |
| 18167 | processed and discarded. |
| 18168 | |
| 18169 | This segment is also optional; scan_partial_symbols and |
| 18170 | add_partial_symbol will handle these DIEs if we chain |
| 18171 | them in normally. When compilers which do not emit large |
| 18172 | quantities of duplicate debug information are more common, |
| 18173 | this code can probably be removed. */ |
| 18174 | |
| 18175 | /* Any complete simple types at the top level (pretty much all |
| 18176 | of them, for a language without namespaces), can be processed |
| 18177 | directly. */ |
| 18178 | if (parent_die == NULL |
| 18179 | && pdi.has_specification == 0 |
| 18180 | && pdi.is_declaration == 0 |
| 18181 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) |
| 18182 | || pdi.tag == DW_TAG_base_type |
| 18183 | || pdi.tag == DW_TAG_subrange_type)) |
| 18184 | { |
| 18185 | if (building_psymtab && pdi.name != NULL) |
| 18186 | add_psymbol_to_list (pdi.name, false, |
| 18187 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
| 18188 | psymbol_placement::STATIC, |
| 18189 | 0, cu->language, objfile); |
| 18190 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
| 18191 | continue; |
| 18192 | } |
| 18193 | |
| 18194 | /* The exception for DW_TAG_typedef with has_children above is |
| 18195 | a workaround of GCC PR debug/47510. In the case of this complaint |
| 18196 | type_name_or_error will error on such types later. |
| 18197 | |
| 18198 | GDB skipped children of DW_TAG_typedef by the shortcut above and then |
| 18199 | it could not find the child DIEs referenced later, this is checked |
| 18200 | above. In correct DWARF DW_TAG_typedef should have no children. */ |
| 18201 | |
| 18202 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
| 18203 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
| 18204 | "- DIE at %s [in module %s]"), |
| 18205 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
| 18206 | |
| 18207 | /* If we're at the second level, and we're an enumerator, and |
| 18208 | our parent has no specification (meaning possibly lives in a |
| 18209 | namespace elsewhere), then we can add the partial symbol now |
| 18210 | instead of queueing it. */ |
| 18211 | if (pdi.tag == DW_TAG_enumerator |
| 18212 | && parent_die != NULL |
| 18213 | && parent_die->die_parent == NULL |
| 18214 | && parent_die->tag == DW_TAG_enumeration_type |
| 18215 | && parent_die->has_specification == 0) |
| 18216 | { |
| 18217 | if (pdi.name == NULL) |
| 18218 | complaint (_("malformed enumerator DIE ignored")); |
| 18219 | else if (building_psymtab) |
| 18220 | add_psymbol_to_list (pdi.name, false, |
| 18221 | VAR_DOMAIN, LOC_CONST, -1, |
| 18222 | cu->language == language_cplus |
| 18223 | ? psymbol_placement::GLOBAL |
| 18224 | : psymbol_placement::STATIC, |
| 18225 | 0, cu->language, objfile); |
| 18226 | |
| 18227 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
| 18228 | continue; |
| 18229 | } |
| 18230 | |
| 18231 | struct partial_die_info *part_die |
| 18232 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
| 18233 | |
| 18234 | /* We'll save this DIE so link it in. */ |
| 18235 | part_die->die_parent = parent_die; |
| 18236 | part_die->die_sibling = NULL; |
| 18237 | part_die->die_child = NULL; |
| 18238 | |
| 18239 | if (last_die && last_die == parent_die) |
| 18240 | last_die->die_child = part_die; |
| 18241 | else if (last_die) |
| 18242 | last_die->die_sibling = part_die; |
| 18243 | |
| 18244 | last_die = part_die; |
| 18245 | |
| 18246 | if (first_die == NULL) |
| 18247 | first_die = part_die; |
| 18248 | |
| 18249 | /* Maybe add the DIE to the hash table. Not all DIEs that we |
| 18250 | find interesting need to be in the hash table, because we |
| 18251 | also have the parent/sibling/child chains; only those that we |
| 18252 | might refer to by offset later during partial symbol reading. |
| 18253 | |
| 18254 | For now this means things that might have be the target of a |
| 18255 | DW_AT_specification, DW_AT_abstract_origin, or |
| 18256 | DW_AT_extension. DW_AT_extension will refer only to |
| 18257 | namespaces; DW_AT_abstract_origin refers to functions (and |
| 18258 | many things under the function DIE, but we do not recurse |
| 18259 | into function DIEs during partial symbol reading) and |
| 18260 | possibly variables as well; DW_AT_specification refers to |
| 18261 | declarations. Declarations ought to have the DW_AT_declaration |
| 18262 | flag. It happens that GCC forgets to put it in sometimes, but |
| 18263 | only for functions, not for types. |
| 18264 | |
| 18265 | Adding more things than necessary to the hash table is harmless |
| 18266 | except for the performance cost. Adding too few will result in |
| 18267 | wasted time in find_partial_die, when we reread the compilation |
| 18268 | unit with load_all_dies set. */ |
| 18269 | |
| 18270 | if (load_all |
| 18271 | || abbrev->tag == DW_TAG_constant |
| 18272 | || abbrev->tag == DW_TAG_subprogram |
| 18273 | || abbrev->tag == DW_TAG_variable |
| 18274 | || abbrev->tag == DW_TAG_namespace |
| 18275 | || part_die->is_declaration) |
| 18276 | { |
| 18277 | void **slot; |
| 18278 | |
| 18279 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, |
| 18280 | to_underlying (part_die->sect_off), |
| 18281 | INSERT); |
| 18282 | *slot = part_die; |
| 18283 | } |
| 18284 | |
| 18285 | /* For some DIEs we want to follow their children (if any). For C |
| 18286 | we have no reason to follow the children of structures; for other |
| 18287 | languages we have to, so that we can get at method physnames |
| 18288 | to infer fully qualified class names, for DW_AT_specification, |
| 18289 | and for C++ template arguments. For C++, we also look one level |
| 18290 | inside functions to find template arguments (if the name of the |
| 18291 | function does not already contain the template arguments). |
| 18292 | |
| 18293 | For Ada and Fortran, we need to scan the children of subprograms |
| 18294 | and lexical blocks as well because these languages allow the |
| 18295 | definition of nested entities that could be interesting for the |
| 18296 | debugger, such as nested subprograms for instance. */ |
| 18297 | if (last_die->has_children |
| 18298 | && (load_all |
| 18299 | || last_die->tag == DW_TAG_namespace |
| 18300 | || last_die->tag == DW_TAG_module |
| 18301 | || last_die->tag == DW_TAG_enumeration_type |
| 18302 | || (cu->language == language_cplus |
| 18303 | && last_die->tag == DW_TAG_subprogram |
| 18304 | && (last_die->name == NULL |
| 18305 | || strchr (last_die->name, '<') == NULL)) |
| 18306 | || (cu->language != language_c |
| 18307 | && (last_die->tag == DW_TAG_class_type |
| 18308 | || last_die->tag == DW_TAG_interface_type |
| 18309 | || last_die->tag == DW_TAG_structure_type |
| 18310 | || last_die->tag == DW_TAG_union_type)) |
| 18311 | || ((cu->language == language_ada |
| 18312 | || cu->language == language_fortran) |
| 18313 | && (last_die->tag == DW_TAG_subprogram |
| 18314 | || last_die->tag == DW_TAG_lexical_block)))) |
| 18315 | { |
| 18316 | nesting_level++; |
| 18317 | parent_die = last_die; |
| 18318 | continue; |
| 18319 | } |
| 18320 | |
| 18321 | /* Otherwise we skip to the next sibling, if any. */ |
| 18322 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
| 18323 | |
| 18324 | /* Back to the top, do it again. */ |
| 18325 | } |
| 18326 | } |
| 18327 | |
| 18328 | partial_die_info::partial_die_info (sect_offset sect_off_, |
| 18329 | struct abbrev_info *abbrev) |
| 18330 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) |
| 18331 | { |
| 18332 | } |
| 18333 | |
| 18334 | /* Read a minimal amount of information into the minimal die structure. |
| 18335 | INFO_PTR should point just after the initial uleb128 of a DIE. */ |
| 18336 | |
| 18337 | const gdb_byte * |
| 18338 | partial_die_info::read (const struct die_reader_specs *reader, |
| 18339 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) |
| 18340 | { |
| 18341 | struct dwarf2_cu *cu = reader->cu; |
| 18342 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18343 | = cu->per_cu->dwarf2_per_objfile; |
| 18344 | unsigned int i; |
| 18345 | int has_low_pc_attr = 0; |
| 18346 | int has_high_pc_attr = 0; |
| 18347 | int high_pc_relative = 0; |
| 18348 | |
| 18349 | for (i = 0; i < abbrev.num_attrs; ++i) |
| 18350 | { |
| 18351 | attribute attr; |
| 18352 | bool need_reprocess; |
| 18353 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], |
| 18354 | info_ptr, &need_reprocess); |
| 18355 | /* String and address offsets that need to do the reprocessing have |
| 18356 | already been read at this point, so there is no need to wait until |
| 18357 | the loop terminates to do the reprocessing. */ |
| 18358 | if (need_reprocess) |
| 18359 | read_attribute_reprocess (reader, &attr); |
| 18360 | /* Store the data if it is of an attribute we want to keep in a |
| 18361 | partial symbol table. */ |
| 18362 | switch (attr.name) |
| 18363 | { |
| 18364 | case DW_AT_name: |
| 18365 | switch (tag) |
| 18366 | { |
| 18367 | case DW_TAG_compile_unit: |
| 18368 | case DW_TAG_partial_unit: |
| 18369 | case DW_TAG_type_unit: |
| 18370 | /* Compilation units have a DW_AT_name that is a filename, not |
| 18371 | a source language identifier. */ |
| 18372 | case DW_TAG_enumeration_type: |
| 18373 | case DW_TAG_enumerator: |
| 18374 | /* These tags always have simple identifiers already; no need |
| 18375 | to canonicalize them. */ |
| 18376 | name = DW_STRING (&attr); |
| 18377 | break; |
| 18378 | default: |
| 18379 | { |
| 18380 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18381 | |
| 18382 | name |
| 18383 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, objfile); |
| 18384 | } |
| 18385 | break; |
| 18386 | } |
| 18387 | break; |
| 18388 | case DW_AT_linkage_name: |
| 18389 | case DW_AT_MIPS_linkage_name: |
| 18390 | /* Note that both forms of linkage name might appear. We |
| 18391 | assume they will be the same, and we only store the last |
| 18392 | one we see. */ |
| 18393 | linkage_name = attr.value_as_string (); |
| 18394 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
| 18395 | See https://github.com/rust-lang/rust/issues/32925. */ |
| 18396 | if (cu->language == language_rust && linkage_name != NULL |
| 18397 | && strchr (linkage_name, '{') != NULL) |
| 18398 | linkage_name = NULL; |
| 18399 | break; |
| 18400 | case DW_AT_low_pc: |
| 18401 | has_low_pc_attr = 1; |
| 18402 | lowpc = attr.value_as_address (); |
| 18403 | break; |
| 18404 | case DW_AT_high_pc: |
| 18405 | has_high_pc_attr = 1; |
| 18406 | highpc = attr.value_as_address (); |
| 18407 | if (cu->header.version >= 4 && attr.form_is_constant ()) |
| 18408 | high_pc_relative = 1; |
| 18409 | break; |
| 18410 | case DW_AT_location: |
| 18411 | /* Support the .debug_loc offsets. */ |
| 18412 | if (attr.form_is_block ()) |
| 18413 | { |
| 18414 | d.locdesc = DW_BLOCK (&attr); |
| 18415 | } |
| 18416 | else if (attr.form_is_section_offset ()) |
| 18417 | { |
| 18418 | dwarf2_complex_location_expr_complaint (); |
| 18419 | } |
| 18420 | else |
| 18421 | { |
| 18422 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 18423 | "partial symbol information"); |
| 18424 | } |
| 18425 | break; |
| 18426 | case DW_AT_external: |
| 18427 | is_external = DW_UNSND (&attr); |
| 18428 | break; |
| 18429 | case DW_AT_declaration: |
| 18430 | is_declaration = DW_UNSND (&attr); |
| 18431 | break; |
| 18432 | case DW_AT_type: |
| 18433 | has_type = 1; |
| 18434 | break; |
| 18435 | case DW_AT_abstract_origin: |
| 18436 | case DW_AT_specification: |
| 18437 | case DW_AT_extension: |
| 18438 | has_specification = 1; |
| 18439 | spec_offset = attr.get_ref_die_offset (); |
| 18440 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
| 18441 | || cu->per_cu->is_dwz); |
| 18442 | break; |
| 18443 | case DW_AT_sibling: |
| 18444 | /* Ignore absolute siblings, they might point outside of |
| 18445 | the current compile unit. */ |
| 18446 | if (attr.form == DW_FORM_ref_addr) |
| 18447 | complaint (_("ignoring absolute DW_AT_sibling")); |
| 18448 | else |
| 18449 | { |
| 18450 | const gdb_byte *buffer = reader->buffer; |
| 18451 | sect_offset off = attr.get_ref_die_offset (); |
| 18452 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
| 18453 | |
| 18454 | if (sibling_ptr < info_ptr) |
| 18455 | complaint (_("DW_AT_sibling points backwards")); |
| 18456 | else if (sibling_ptr > reader->buffer_end) |
| 18457 | reader->die_section->overflow_complaint (); |
| 18458 | else |
| 18459 | sibling = sibling_ptr; |
| 18460 | } |
| 18461 | break; |
| 18462 | case DW_AT_byte_size: |
| 18463 | has_byte_size = 1; |
| 18464 | break; |
| 18465 | case DW_AT_const_value: |
| 18466 | has_const_value = 1; |
| 18467 | break; |
| 18468 | case DW_AT_calling_convention: |
| 18469 | /* DWARF doesn't provide a way to identify a program's source-level |
| 18470 | entry point. DW_AT_calling_convention attributes are only meant |
| 18471 | to describe functions' calling conventions. |
| 18472 | |
| 18473 | However, because it's a necessary piece of information in |
| 18474 | Fortran, and before DWARF 4 DW_CC_program was the only |
| 18475 | piece of debugging information whose definition refers to |
| 18476 | a 'main program' at all, several compilers marked Fortran |
| 18477 | main programs with DW_CC_program --- even when those |
| 18478 | functions use the standard calling conventions. |
| 18479 | |
| 18480 | Although DWARF now specifies a way to provide this |
| 18481 | information, we support this practice for backward |
| 18482 | compatibility. */ |
| 18483 | if (DW_UNSND (&attr) == DW_CC_program |
| 18484 | && cu->language == language_fortran) |
| 18485 | main_subprogram = 1; |
| 18486 | break; |
| 18487 | case DW_AT_inline: |
| 18488 | if (DW_UNSND (&attr) == DW_INL_inlined |
| 18489 | || DW_UNSND (&attr) == DW_INL_declared_inlined) |
| 18490 | may_be_inlined = 1; |
| 18491 | break; |
| 18492 | |
| 18493 | case DW_AT_import: |
| 18494 | if (tag == DW_TAG_imported_unit) |
| 18495 | { |
| 18496 | d.sect_off = attr.get_ref_die_offset (); |
| 18497 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
| 18498 | || cu->per_cu->is_dwz); |
| 18499 | } |
| 18500 | break; |
| 18501 | |
| 18502 | case DW_AT_main_subprogram: |
| 18503 | main_subprogram = DW_UNSND (&attr); |
| 18504 | break; |
| 18505 | |
| 18506 | case DW_AT_ranges: |
| 18507 | { |
| 18508 | /* It would be nice to reuse dwarf2_get_pc_bounds here, |
| 18509 | but that requires a full DIE, so instead we just |
| 18510 | reimplement it. */ |
| 18511 | int need_ranges_base = tag != DW_TAG_compile_unit; |
| 18512 | unsigned int ranges_offset = (DW_UNSND (&attr) |
| 18513 | + (need_ranges_base |
| 18514 | ? cu->ranges_base |
| 18515 | : 0)); |
| 18516 | |
| 18517 | /* Value of the DW_AT_ranges attribute is the offset in the |
| 18518 | .debug_ranges section. */ |
| 18519 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, |
| 18520 | nullptr)) |
| 18521 | has_pc_info = 1; |
| 18522 | } |
| 18523 | break; |
| 18524 | |
| 18525 | default: |
| 18526 | break; |
| 18527 | } |
| 18528 | } |
| 18529 | |
| 18530 | /* For Ada, if both the name and the linkage name appear, we prefer |
| 18531 | the latter. This lets "catch exception" work better, regardless |
| 18532 | of the order in which the name and linkage name were emitted. |
| 18533 | Really, though, this is just a workaround for the fact that gdb |
| 18534 | doesn't store both the name and the linkage name. */ |
| 18535 | if (cu->language == language_ada && linkage_name != nullptr) |
| 18536 | name = linkage_name; |
| 18537 | |
| 18538 | if (high_pc_relative) |
| 18539 | highpc += lowpc; |
| 18540 | |
| 18541 | if (has_low_pc_attr && has_high_pc_attr) |
| 18542 | { |
| 18543 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 18544 | eliminate duplicate copies of functions and vtables and such. |
| 18545 | The linker will arbitrarily choose one and discard the others. |
| 18546 | The AT_*_pc values for such functions refer to local labels in |
| 18547 | these sections. If the section from that file was discarded, the |
| 18548 | labels are not in the output, so the relocs get a value of 0. |
| 18549 | If this is a discarded function, mark the pc bounds as invalid, |
| 18550 | so that GDB will ignore it. */ |
| 18551 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 18552 | { |
| 18553 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18554 | struct gdbarch *gdbarch = objfile->arch (); |
| 18555 | |
| 18556 | complaint (_("DW_AT_low_pc %s is zero " |
| 18557 | "for DIE at %s [in module %s]"), |
| 18558 | paddress (gdbarch, lowpc), |
| 18559 | sect_offset_str (sect_off), |
| 18560 | objfile_name (objfile)); |
| 18561 | } |
| 18562 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ |
| 18563 | else if (lowpc >= highpc) |
| 18564 | { |
| 18565 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18566 | struct gdbarch *gdbarch = objfile->arch (); |
| 18567 | |
| 18568 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
| 18569 | "for DIE at %s [in module %s]"), |
| 18570 | paddress (gdbarch, lowpc), |
| 18571 | paddress (gdbarch, highpc), |
| 18572 | sect_offset_str (sect_off), |
| 18573 | objfile_name (objfile)); |
| 18574 | } |
| 18575 | else |
| 18576 | has_pc_info = 1; |
| 18577 | } |
| 18578 | |
| 18579 | return info_ptr; |
| 18580 | } |
| 18581 | |
| 18582 | /* Find a cached partial DIE at OFFSET in CU. */ |
| 18583 | |
| 18584 | struct partial_die_info * |
| 18585 | dwarf2_cu::find_partial_die (sect_offset sect_off) |
| 18586 | { |
| 18587 | struct partial_die_info *lookup_die = NULL; |
| 18588 | struct partial_die_info part_die (sect_off); |
| 18589 | |
| 18590 | lookup_die = ((struct partial_die_info *) |
| 18591 | htab_find_with_hash (partial_dies, &part_die, |
| 18592 | to_underlying (sect_off))); |
| 18593 | |
| 18594 | return lookup_die; |
| 18595 | } |
| 18596 | |
| 18597 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
| 18598 | except in the case of .debug_types DIEs which do not reference |
| 18599 | outside their CU (they do however referencing other types via |
| 18600 | DW_FORM_ref_sig8). */ |
| 18601 | |
| 18602 | static const struct cu_partial_die_info |
| 18603 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
| 18604 | { |
| 18605 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18606 | = cu->per_cu->dwarf2_per_objfile; |
| 18607 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18608 | struct dwarf2_per_cu_data *per_cu = NULL; |
| 18609 | struct partial_die_info *pd = NULL; |
| 18610 | |
| 18611 | if (offset_in_dwz == cu->per_cu->is_dwz |
| 18612 | && cu->header.offset_in_cu_p (sect_off)) |
| 18613 | { |
| 18614 | pd = cu->find_partial_die (sect_off); |
| 18615 | if (pd != NULL) |
| 18616 | return { cu, pd }; |
| 18617 | /* We missed recording what we needed. |
| 18618 | Load all dies and try again. */ |
| 18619 | per_cu = cu->per_cu; |
| 18620 | } |
| 18621 | else |
| 18622 | { |
| 18623 | /* TUs don't reference other CUs/TUs (except via type signatures). */ |
| 18624 | if (cu->per_cu->is_debug_types) |
| 18625 | { |
| 18626 | error (_("Dwarf Error: Type Unit at offset %s contains" |
| 18627 | " external reference to offset %s [in module %s].\n"), |
| 18628 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), |
| 18629 | bfd_get_filename (objfile->obfd)); |
| 18630 | } |
| 18631 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
| 18632 | dwarf2_per_objfile); |
| 18633 | |
| 18634 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
| 18635 | load_partial_comp_unit (per_cu); |
| 18636 | |
| 18637 | per_cu->cu->last_used = 0; |
| 18638 | pd = per_cu->cu->find_partial_die (sect_off); |
| 18639 | } |
| 18640 | |
| 18641 | /* If we didn't find it, and not all dies have been loaded, |
| 18642 | load them all and try again. */ |
| 18643 | |
| 18644 | if (pd == NULL && per_cu->load_all_dies == 0) |
| 18645 | { |
| 18646 | per_cu->load_all_dies = 1; |
| 18647 | |
| 18648 | /* This is nasty. When we reread the DIEs, somewhere up the call chain |
| 18649 | THIS_CU->cu may already be in use. So we can't just free it and |
| 18650 | replace its DIEs with the ones we read in. Instead, we leave those |
| 18651 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), |
| 18652 | and clobber THIS_CU->cu->partial_dies with the hash table for the new |
| 18653 | set. */ |
| 18654 | load_partial_comp_unit (per_cu); |
| 18655 | |
| 18656 | pd = per_cu->cu->find_partial_die (sect_off); |
| 18657 | } |
| 18658 | |
| 18659 | if (pd == NULL) |
| 18660 | internal_error (__FILE__, __LINE__, |
| 18661 | _("could not find partial DIE %s " |
| 18662 | "in cache [from module %s]\n"), |
| 18663 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
| 18664 | return { per_cu->cu, pd }; |
| 18665 | } |
| 18666 | |
| 18667 | /* See if we can figure out if the class lives in a namespace. We do |
| 18668 | this by looking for a member function; its demangled name will |
| 18669 | contain namespace info, if there is any. */ |
| 18670 | |
| 18671 | static void |
| 18672 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, |
| 18673 | struct dwarf2_cu *cu) |
| 18674 | { |
| 18675 | /* NOTE: carlton/2003-10-07: Getting the info this way changes |
| 18676 | what template types look like, because the demangler |
| 18677 | frequently doesn't give the same name as the debug info. We |
| 18678 | could fix this by only using the demangled name to get the |
| 18679 | prefix (but see comment in read_structure_type). */ |
| 18680 | |
| 18681 | struct partial_die_info *real_pdi; |
| 18682 | struct partial_die_info *child_pdi; |
| 18683 | |
| 18684 | /* If this DIE (this DIE's specification, if any) has a parent, then |
| 18685 | we should not do this. We'll prepend the parent's fully qualified |
| 18686 | name when we create the partial symbol. */ |
| 18687 | |
| 18688 | real_pdi = struct_pdi; |
| 18689 | while (real_pdi->has_specification) |
| 18690 | { |
| 18691 | auto res = find_partial_die (real_pdi->spec_offset, |
| 18692 | real_pdi->spec_is_dwz, cu); |
| 18693 | real_pdi = res.pdi; |
| 18694 | cu = res.cu; |
| 18695 | } |
| 18696 | |
| 18697 | if (real_pdi->die_parent != NULL) |
| 18698 | return; |
| 18699 | |
| 18700 | for (child_pdi = struct_pdi->die_child; |
| 18701 | child_pdi != NULL; |
| 18702 | child_pdi = child_pdi->die_sibling) |
| 18703 | { |
| 18704 | if (child_pdi->tag == DW_TAG_subprogram |
| 18705 | && child_pdi->linkage_name != NULL) |
| 18706 | { |
| 18707 | gdb::unique_xmalloc_ptr<char> actual_class_name |
| 18708 | (language_class_name_from_physname (cu->language_defn, |
| 18709 | child_pdi->linkage_name)); |
| 18710 | if (actual_class_name != NULL) |
| 18711 | { |
| 18712 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18713 | struct_pdi->name = objfile->intern (actual_class_name.get ()); |
| 18714 | } |
| 18715 | break; |
| 18716 | } |
| 18717 | } |
| 18718 | } |
| 18719 | |
| 18720 | /* Return true if a DIE with TAG may have the DW_AT_const_value |
| 18721 | attribute. */ |
| 18722 | |
| 18723 | static bool |
| 18724 | can_have_DW_AT_const_value_p (enum dwarf_tag tag) |
| 18725 | { |
| 18726 | switch (tag) |
| 18727 | { |
| 18728 | case DW_TAG_constant: |
| 18729 | case DW_TAG_enumerator: |
| 18730 | case DW_TAG_formal_parameter: |
| 18731 | case DW_TAG_template_value_param: |
| 18732 | case DW_TAG_variable: |
| 18733 | return true; |
| 18734 | } |
| 18735 | |
| 18736 | return false; |
| 18737 | } |
| 18738 | |
| 18739 | void |
| 18740 | partial_die_info::fixup (struct dwarf2_cu *cu) |
| 18741 | { |
| 18742 | /* Once we've fixed up a die, there's no point in doing so again. |
| 18743 | This also avoids a memory leak if we were to call |
| 18744 | guess_partial_die_structure_name multiple times. */ |
| 18745 | if (fixup_called) |
| 18746 | return; |
| 18747 | |
| 18748 | /* If we found a reference attribute and the DIE has no name, try |
| 18749 | to find a name in the referred to DIE. */ |
| 18750 | |
| 18751 | if (name == NULL && has_specification) |
| 18752 | { |
| 18753 | struct partial_die_info *spec_die; |
| 18754 | |
| 18755 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
| 18756 | spec_die = res.pdi; |
| 18757 | cu = res.cu; |
| 18758 | |
| 18759 | spec_die->fixup (cu); |
| 18760 | |
| 18761 | if (spec_die->name) |
| 18762 | { |
| 18763 | name = spec_die->name; |
| 18764 | |
| 18765 | /* Copy DW_AT_external attribute if it is set. */ |
| 18766 | if (spec_die->is_external) |
| 18767 | is_external = spec_die->is_external; |
| 18768 | } |
| 18769 | } |
| 18770 | |
| 18771 | if (!has_const_value && has_specification |
| 18772 | && can_have_DW_AT_const_value_p (tag)) |
| 18773 | { |
| 18774 | struct partial_die_info *spec_die; |
| 18775 | |
| 18776 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
| 18777 | spec_die = res.pdi; |
| 18778 | cu = res.cu; |
| 18779 | |
| 18780 | spec_die->fixup (cu); |
| 18781 | |
| 18782 | if (spec_die->has_const_value) |
| 18783 | { |
| 18784 | /* Copy DW_AT_const_value attribute if it is set. */ |
| 18785 | has_const_value = spec_die->has_const_value; |
| 18786 | } |
| 18787 | } |
| 18788 | |
| 18789 | /* Set default names for some unnamed DIEs. */ |
| 18790 | |
| 18791 | if (name == NULL && tag == DW_TAG_namespace) |
| 18792 | name = CP_ANONYMOUS_NAMESPACE_STR; |
| 18793 | |
| 18794 | /* If there is no parent die to provide a namespace, and there are |
| 18795 | children, see if we can determine the namespace from their linkage |
| 18796 | name. */ |
| 18797 | if (cu->language == language_cplus |
| 18798 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
| 18799 | && die_parent == NULL |
| 18800 | && has_children |
| 18801 | && (tag == DW_TAG_class_type |
| 18802 | || tag == DW_TAG_structure_type |
| 18803 | || tag == DW_TAG_union_type)) |
| 18804 | guess_partial_die_structure_name (this, cu); |
| 18805 | |
| 18806 | /* GCC might emit a nameless struct or union that has a linkage |
| 18807 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 18808 | if (name == NULL |
| 18809 | && (tag == DW_TAG_class_type |
| 18810 | || tag == DW_TAG_interface_type |
| 18811 | || tag == DW_TAG_structure_type |
| 18812 | || tag == DW_TAG_union_type) |
| 18813 | && linkage_name != NULL) |
| 18814 | { |
| 18815 | gdb::unique_xmalloc_ptr<char> demangled |
| 18816 | (gdb_demangle (linkage_name, DMGL_TYPES)); |
| 18817 | if (demangled != nullptr) |
| 18818 | { |
| 18819 | const char *base; |
| 18820 | |
| 18821 | /* Strip any leading namespaces/classes, keep only the base name. |
| 18822 | DW_AT_name for named DIEs does not contain the prefixes. */ |
| 18823 | base = strrchr (demangled.get (), ':'); |
| 18824 | if (base && base > demangled.get () && base[-1] == ':') |
| 18825 | base++; |
| 18826 | else |
| 18827 | base = demangled.get (); |
| 18828 | |
| 18829 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18830 | name = objfile->intern (base); |
| 18831 | } |
| 18832 | } |
| 18833 | |
| 18834 | fixup_called = 1; |
| 18835 | } |
| 18836 | |
| 18837 | /* Read the .debug_loclists header contents from the given SECTION in the |
| 18838 | HEADER. */ |
| 18839 | static void |
| 18840 | read_loclist_header (struct loclist_header *header, |
| 18841 | struct dwarf2_section_info *section) |
| 18842 | { |
| 18843 | unsigned int bytes_read; |
| 18844 | bfd *abfd = section->get_bfd_owner (); |
| 18845 | const gdb_byte *info_ptr = section->buffer; |
| 18846 | header->length = read_initial_length (abfd, info_ptr, &bytes_read); |
| 18847 | info_ptr += bytes_read; |
| 18848 | header->version = read_2_bytes (abfd, info_ptr); |
| 18849 | info_ptr += 2; |
| 18850 | header->addr_size = read_1_byte (abfd, info_ptr); |
| 18851 | info_ptr += 1; |
| 18852 | header->segment_collector_size = read_1_byte (abfd, info_ptr); |
| 18853 | info_ptr += 1; |
| 18854 | header->offset_entry_count = read_4_bytes (abfd, info_ptr); |
| 18855 | } |
| 18856 | |
| 18857 | /* Return the DW_AT_loclists_base value for the CU. */ |
| 18858 | static ULONGEST |
| 18859 | lookup_loclist_base (struct dwarf2_cu *cu) |
| 18860 | { |
| 18861 | /* For the .dwo unit, the loclist_base points to the first offset following |
| 18862 | the header. The header consists of the following entities- |
| 18863 | 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64 |
| 18864 | bit format) |
| 18865 | 2. version (2 bytes) |
| 18866 | 3. address size (1 byte) |
| 18867 | 4. segment selector size (1 byte) |
| 18868 | 5. offset entry count (4 bytes) |
| 18869 | These sizes are derived as per the DWARFv5 standard. */ |
| 18870 | if (cu->dwo_unit != nullptr) |
| 18871 | { |
| 18872 | if (cu->header.initial_length_size == 4) |
| 18873 | return LOCLIST_HEADER_SIZE32; |
| 18874 | return LOCLIST_HEADER_SIZE64; |
| 18875 | } |
| 18876 | return cu->loclist_base; |
| 18877 | } |
| 18878 | |
| 18879 | /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the |
| 18880 | array of offsets in the .debug_loclists section. */ |
| 18881 | static CORE_ADDR |
| 18882 | read_loclist_index (struct dwarf2_cu *cu, ULONGEST loclist_index) |
| 18883 | { |
| 18884 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18885 | = cu->per_cu->dwarf2_per_objfile; |
| 18886 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18887 | bfd *abfd = objfile->obfd; |
| 18888 | ULONGEST loclist_base = lookup_loclist_base (cu); |
| 18889 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
| 18890 | |
| 18891 | section->read (objfile); |
| 18892 | if (section->buffer == NULL) |
| 18893 | complaint (_("DW_FORM_loclistx used without .debug_loclists " |
| 18894 | "section [in module %s]"), objfile_name (objfile)); |
| 18895 | struct loclist_header header; |
| 18896 | read_loclist_header (&header, section); |
| 18897 | if (loclist_index >= header.offset_entry_count) |
| 18898 | complaint (_("DW_FORM_loclistx pointing outside of " |
| 18899 | ".debug_loclists offset array [in module %s]"), |
| 18900 | objfile_name (objfile)); |
| 18901 | if (loclist_base + loclist_index * cu->header.offset_size |
| 18902 | >= section->size) |
| 18903 | complaint (_("DW_FORM_loclistx pointing outside of " |
| 18904 | ".debug_loclists section [in module %s]"), |
| 18905 | objfile_name (objfile)); |
| 18906 | const gdb_byte *info_ptr |
| 18907 | = section->buffer + loclist_base + loclist_index * cu->header.offset_size; |
| 18908 | |
| 18909 | if (cu->header.offset_size == 4) |
| 18910 | return bfd_get_32 (abfd, info_ptr) + loclist_base; |
| 18911 | else |
| 18912 | return bfd_get_64 (abfd, info_ptr) + loclist_base; |
| 18913 | } |
| 18914 | |
| 18915 | /* Process the attributes that had to be skipped in the first round. These |
| 18916 | attributes are the ones that need str_offsets_base or addr_base attributes. |
| 18917 | They could not have been processed in the first round, because at the time |
| 18918 | the values of str_offsets_base or addr_base may not have been known. */ |
| 18919 | static void |
| 18920 | read_attribute_reprocess (const struct die_reader_specs *reader, |
| 18921 | struct attribute *attr) |
| 18922 | { |
| 18923 | struct dwarf2_cu *cu = reader->cu; |
| 18924 | switch (attr->form) |
| 18925 | { |
| 18926 | case DW_FORM_addrx: |
| 18927 | case DW_FORM_GNU_addr_index: |
| 18928 | DW_ADDR (attr) = read_addr_index (cu, DW_UNSND (attr)); |
| 18929 | break; |
| 18930 | case DW_FORM_loclistx: |
| 18931 | DW_UNSND (attr) = read_loclist_index (cu, DW_UNSND (attr)); |
| 18932 | break; |
| 18933 | case DW_FORM_strx: |
| 18934 | case DW_FORM_strx1: |
| 18935 | case DW_FORM_strx2: |
| 18936 | case DW_FORM_strx3: |
| 18937 | case DW_FORM_strx4: |
| 18938 | case DW_FORM_GNU_str_index: |
| 18939 | { |
| 18940 | unsigned int str_index = DW_UNSND (attr); |
| 18941 | if (reader->dwo_file != NULL) |
| 18942 | { |
| 18943 | DW_STRING (attr) = read_dwo_str_index (reader, str_index); |
| 18944 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 18945 | } |
| 18946 | else |
| 18947 | { |
| 18948 | DW_STRING (attr) = read_stub_str_index (cu, str_index); |
| 18949 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 18950 | } |
| 18951 | break; |
| 18952 | } |
| 18953 | default: |
| 18954 | gdb_assert_not_reached (_("Unexpected DWARF form.")); |
| 18955 | } |
| 18956 | } |
| 18957 | |
| 18958 | /* Read an attribute value described by an attribute form. */ |
| 18959 | |
| 18960 | static const gdb_byte * |
| 18961 | read_attribute_value (const struct die_reader_specs *reader, |
| 18962 | struct attribute *attr, unsigned form, |
| 18963 | LONGEST implicit_const, const gdb_byte *info_ptr, |
| 18964 | bool *need_reprocess) |
| 18965 | { |
| 18966 | struct dwarf2_cu *cu = reader->cu; |
| 18967 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18968 | = cu->per_cu->dwarf2_per_objfile; |
| 18969 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18970 | bfd *abfd = reader->abfd; |
| 18971 | struct comp_unit_head *cu_header = &cu->header; |
| 18972 | unsigned int bytes_read; |
| 18973 | struct dwarf_block *blk; |
| 18974 | *need_reprocess = false; |
| 18975 | |
| 18976 | attr->form = (enum dwarf_form) form; |
| 18977 | switch (form) |
| 18978 | { |
| 18979 | case DW_FORM_ref_addr: |
| 18980 | if (cu->header.version == 2) |
| 18981 | DW_UNSND (attr) = cu->header.read_address (abfd, info_ptr, |
| 18982 | &bytes_read); |
| 18983 | else |
| 18984 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, |
| 18985 | &bytes_read); |
| 18986 | info_ptr += bytes_read; |
| 18987 | break; |
| 18988 | case DW_FORM_GNU_ref_alt: |
| 18989 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
| 18990 | info_ptr += bytes_read; |
| 18991 | break; |
| 18992 | case DW_FORM_addr: |
| 18993 | { |
| 18994 | struct gdbarch *gdbarch = objfile->arch (); |
| 18995 | DW_ADDR (attr) = cu->header.read_address (abfd, info_ptr, &bytes_read); |
| 18996 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
| 18997 | info_ptr += bytes_read; |
| 18998 | } |
| 18999 | break; |
| 19000 | case DW_FORM_block2: |
| 19001 | blk = dwarf_alloc_block (cu); |
| 19002 | blk->size = read_2_bytes (abfd, info_ptr); |
| 19003 | info_ptr += 2; |
| 19004 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19005 | info_ptr += blk->size; |
| 19006 | DW_BLOCK (attr) = blk; |
| 19007 | break; |
| 19008 | case DW_FORM_block4: |
| 19009 | blk = dwarf_alloc_block (cu); |
| 19010 | blk->size = read_4_bytes (abfd, info_ptr); |
| 19011 | info_ptr += 4; |
| 19012 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19013 | info_ptr += blk->size; |
| 19014 | DW_BLOCK (attr) = blk; |
| 19015 | break; |
| 19016 | case DW_FORM_data2: |
| 19017 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 19018 | info_ptr += 2; |
| 19019 | break; |
| 19020 | case DW_FORM_data4: |
| 19021 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 19022 | info_ptr += 4; |
| 19023 | break; |
| 19024 | case DW_FORM_data8: |
| 19025 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 19026 | info_ptr += 8; |
| 19027 | break; |
| 19028 | case DW_FORM_data16: |
| 19029 | blk = dwarf_alloc_block (cu); |
| 19030 | blk->size = 16; |
| 19031 | blk->data = read_n_bytes (abfd, info_ptr, 16); |
| 19032 | info_ptr += 16; |
| 19033 | DW_BLOCK (attr) = blk; |
| 19034 | break; |
| 19035 | case DW_FORM_sec_offset: |
| 19036 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
| 19037 | info_ptr += bytes_read; |
| 19038 | break; |
| 19039 | case DW_FORM_loclistx: |
| 19040 | { |
| 19041 | *need_reprocess = true; |
| 19042 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19043 | info_ptr += bytes_read; |
| 19044 | } |
| 19045 | break; |
| 19046 | case DW_FORM_string: |
| 19047 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
| 19048 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19049 | info_ptr += bytes_read; |
| 19050 | break; |
| 19051 | case DW_FORM_strp: |
| 19052 | if (!cu->per_cu->is_dwz) |
| 19053 | { |
| 19054 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
| 19055 | abfd, info_ptr, cu_header, |
| 19056 | &bytes_read); |
| 19057 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19058 | info_ptr += bytes_read; |
| 19059 | break; |
| 19060 | } |
| 19061 | /* FALLTHROUGH */ |
| 19062 | case DW_FORM_line_strp: |
| 19063 | if (!cu->per_cu->is_dwz) |
| 19064 | { |
| 19065 | DW_STRING (attr) |
| 19066 | = dwarf2_per_objfile->read_line_string (info_ptr, cu_header, |
| 19067 | &bytes_read); |
| 19068 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19069 | info_ptr += bytes_read; |
| 19070 | break; |
| 19071 | } |
| 19072 | /* FALLTHROUGH */ |
| 19073 | case DW_FORM_GNU_strp_alt: |
| 19074 | { |
| 19075 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 19076 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
| 19077 | &bytes_read); |
| 19078 | |
| 19079 | DW_STRING (attr) = dwz->read_string (objfile, str_offset); |
| 19080 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19081 | info_ptr += bytes_read; |
| 19082 | } |
| 19083 | break; |
| 19084 | case DW_FORM_exprloc: |
| 19085 | case DW_FORM_block: |
| 19086 | blk = dwarf_alloc_block (cu); |
| 19087 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19088 | info_ptr += bytes_read; |
| 19089 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19090 | info_ptr += blk->size; |
| 19091 | DW_BLOCK (attr) = blk; |
| 19092 | break; |
| 19093 | case DW_FORM_block1: |
| 19094 | blk = dwarf_alloc_block (cu); |
| 19095 | blk->size = read_1_byte (abfd, info_ptr); |
| 19096 | info_ptr += 1; |
| 19097 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19098 | info_ptr += blk->size; |
| 19099 | DW_BLOCK (attr) = blk; |
| 19100 | break; |
| 19101 | case DW_FORM_data1: |
| 19102 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 19103 | info_ptr += 1; |
| 19104 | break; |
| 19105 | case DW_FORM_flag: |
| 19106 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 19107 | info_ptr += 1; |
| 19108 | break; |
| 19109 | case DW_FORM_flag_present: |
| 19110 | DW_UNSND (attr) = 1; |
| 19111 | break; |
| 19112 | case DW_FORM_sdata: |
| 19113 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 19114 | info_ptr += bytes_read; |
| 19115 | break; |
| 19116 | case DW_FORM_udata: |
| 19117 | case DW_FORM_rnglistx: |
| 19118 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19119 | info_ptr += bytes_read; |
| 19120 | break; |
| 19121 | case DW_FORM_ref1: |
| 19122 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19123 | + read_1_byte (abfd, info_ptr)); |
| 19124 | info_ptr += 1; |
| 19125 | break; |
| 19126 | case DW_FORM_ref2: |
| 19127 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19128 | + read_2_bytes (abfd, info_ptr)); |
| 19129 | info_ptr += 2; |
| 19130 | break; |
| 19131 | case DW_FORM_ref4: |
| 19132 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19133 | + read_4_bytes (abfd, info_ptr)); |
| 19134 | info_ptr += 4; |
| 19135 | break; |
| 19136 | case DW_FORM_ref8: |
| 19137 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19138 | + read_8_bytes (abfd, info_ptr)); |
| 19139 | info_ptr += 8; |
| 19140 | break; |
| 19141 | case DW_FORM_ref_sig8: |
| 19142 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
| 19143 | info_ptr += 8; |
| 19144 | break; |
| 19145 | case DW_FORM_ref_udata: |
| 19146 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19147 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
| 19148 | info_ptr += bytes_read; |
| 19149 | break; |
| 19150 | case DW_FORM_indirect: |
| 19151 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19152 | info_ptr += bytes_read; |
| 19153 | if (form == DW_FORM_implicit_const) |
| 19154 | { |
| 19155 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 19156 | info_ptr += bytes_read; |
| 19157 | } |
| 19158 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, |
| 19159 | info_ptr, need_reprocess); |
| 19160 | break; |
| 19161 | case DW_FORM_implicit_const: |
| 19162 | DW_SND (attr) = implicit_const; |
| 19163 | break; |
| 19164 | case DW_FORM_addrx: |
| 19165 | case DW_FORM_GNU_addr_index: |
| 19166 | *need_reprocess = true; |
| 19167 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19168 | info_ptr += bytes_read; |
| 19169 | break; |
| 19170 | case DW_FORM_strx: |
| 19171 | case DW_FORM_strx1: |
| 19172 | case DW_FORM_strx2: |
| 19173 | case DW_FORM_strx3: |
| 19174 | case DW_FORM_strx4: |
| 19175 | case DW_FORM_GNU_str_index: |
| 19176 | { |
| 19177 | ULONGEST str_index; |
| 19178 | if (form == DW_FORM_strx1) |
| 19179 | { |
| 19180 | str_index = read_1_byte (abfd, info_ptr); |
| 19181 | info_ptr += 1; |
| 19182 | } |
| 19183 | else if (form == DW_FORM_strx2) |
| 19184 | { |
| 19185 | str_index = read_2_bytes (abfd, info_ptr); |
| 19186 | info_ptr += 2; |
| 19187 | } |
| 19188 | else if (form == DW_FORM_strx3) |
| 19189 | { |
| 19190 | str_index = read_3_bytes (abfd, info_ptr); |
| 19191 | info_ptr += 3; |
| 19192 | } |
| 19193 | else if (form == DW_FORM_strx4) |
| 19194 | { |
| 19195 | str_index = read_4_bytes (abfd, info_ptr); |
| 19196 | info_ptr += 4; |
| 19197 | } |
| 19198 | else |
| 19199 | { |
| 19200 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19201 | info_ptr += bytes_read; |
| 19202 | } |
| 19203 | *need_reprocess = true; |
| 19204 | DW_UNSND (attr) = str_index; |
| 19205 | } |
| 19206 | break; |
| 19207 | default: |
| 19208 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
| 19209 | dwarf_form_name (form), |
| 19210 | bfd_get_filename (abfd)); |
| 19211 | } |
| 19212 | |
| 19213 | /* Super hack. */ |
| 19214 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
| 19215 | attr->form = DW_FORM_GNU_ref_alt; |
| 19216 | |
| 19217 | /* We have seen instances where the compiler tried to emit a byte |
| 19218 | size attribute of -1 which ended up being encoded as an unsigned |
| 19219 | 0xffffffff. Although 0xffffffff is technically a valid size value, |
| 19220 | an object of this size seems pretty unlikely so we can relatively |
| 19221 | safely treat these cases as if the size attribute was invalid and |
| 19222 | treat them as zero by default. */ |
| 19223 | if (attr->name == DW_AT_byte_size |
| 19224 | && form == DW_FORM_data4 |
| 19225 | && DW_UNSND (attr) >= 0xffffffff) |
| 19226 | { |
| 19227 | complaint |
| 19228 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
| 19229 | hex_string (DW_UNSND (attr))); |
| 19230 | DW_UNSND (attr) = 0; |
| 19231 | } |
| 19232 | |
| 19233 | return info_ptr; |
| 19234 | } |
| 19235 | |
| 19236 | /* Read an attribute described by an abbreviated attribute. */ |
| 19237 | |
| 19238 | static const gdb_byte * |
| 19239 | read_attribute (const struct die_reader_specs *reader, |
| 19240 | struct attribute *attr, struct attr_abbrev *abbrev, |
| 19241 | const gdb_byte *info_ptr, bool *need_reprocess) |
| 19242 | { |
| 19243 | attr->name = abbrev->name; |
| 19244 | return read_attribute_value (reader, attr, abbrev->form, |
| 19245 | abbrev->implicit_const, info_ptr, |
| 19246 | need_reprocess); |
| 19247 | } |
| 19248 | |
| 19249 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
| 19250 | |
| 19251 | static const char * |
| 19252 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19253 | LONGEST str_offset) |
| 19254 | { |
| 19255 | return dwarf2_per_objfile->str.read_string (dwarf2_per_objfile->objfile, |
| 19256 | str_offset, "DW_FORM_strp"); |
| 19257 | } |
| 19258 | |
| 19259 | /* Return pointer to string at .debug_str offset as read from BUF. |
| 19260 | BUF is assumed to be in a compilation unit described by CU_HEADER. |
| 19261 | Return *BYTES_READ_PTR count of bytes read from BUF. */ |
| 19262 | |
| 19263 | static const char * |
| 19264 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
| 19265 | const gdb_byte *buf, |
| 19266 | const struct comp_unit_head *cu_header, |
| 19267 | unsigned int *bytes_read_ptr) |
| 19268 | { |
| 19269 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
| 19270 | |
| 19271 | return read_indirect_string_at_offset (dwarf2_per_objfile, str_offset); |
| 19272 | } |
| 19273 | |
| 19274 | /* See read.h. */ |
| 19275 | |
| 19276 | const char * |
| 19277 | dwarf2_per_objfile::read_line_string (const gdb_byte *buf, |
| 19278 | const struct comp_unit_head *cu_header, |
| 19279 | unsigned int *bytes_read_ptr) |
| 19280 | { |
| 19281 | bfd *abfd = objfile->obfd; |
| 19282 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
| 19283 | |
| 19284 | return line_str.read_string (objfile, str_offset, "DW_FORM_line_strp"); |
| 19285 | } |
| 19286 | |
| 19287 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
| 19288 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
| 19289 | ADDR_SIZE is the size of addresses from the CU header. */ |
| 19290 | |
| 19291 | static CORE_ADDR |
| 19292 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19293 | unsigned int addr_index, gdb::optional<ULONGEST> addr_base, |
| 19294 | int addr_size) |
| 19295 | { |
| 19296 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 19297 | bfd *abfd = objfile->obfd; |
| 19298 | const gdb_byte *info_ptr; |
| 19299 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
| 19300 | |
| 19301 | dwarf2_per_objfile->addr.read (objfile); |
| 19302 | if (dwarf2_per_objfile->addr.buffer == NULL) |
| 19303 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), |
| 19304 | objfile_name (objfile)); |
| 19305 | if (addr_base_or_zero + addr_index * addr_size |
| 19306 | >= dwarf2_per_objfile->addr.size) |
| 19307 | error (_("DW_FORM_addr_index pointing outside of " |
| 19308 | ".debug_addr section [in module %s]"), |
| 19309 | objfile_name (objfile)); |
| 19310 | info_ptr = (dwarf2_per_objfile->addr.buffer |
| 19311 | + addr_base_or_zero + addr_index * addr_size); |
| 19312 | if (addr_size == 4) |
| 19313 | return bfd_get_32 (abfd, info_ptr); |
| 19314 | else |
| 19315 | return bfd_get_64 (abfd, info_ptr); |
| 19316 | } |
| 19317 | |
| 19318 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ |
| 19319 | |
| 19320 | static CORE_ADDR |
| 19321 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) |
| 19322 | { |
| 19323 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
| 19324 | cu->addr_base, cu->header.addr_size); |
| 19325 | } |
| 19326 | |
| 19327 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ |
| 19328 | |
| 19329 | static CORE_ADDR |
| 19330 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
| 19331 | unsigned int *bytes_read) |
| 19332 | { |
| 19333 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
| 19334 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
| 19335 | |
| 19336 | return read_addr_index (cu, addr_index); |
| 19337 | } |
| 19338 | |
| 19339 | /* See read.h. */ |
| 19340 | |
| 19341 | CORE_ADDR |
| 19342 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, unsigned int addr_index) |
| 19343 | { |
| 19344 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 19345 | struct dwarf2_cu *cu = per_cu->cu; |
| 19346 | gdb::optional<ULONGEST> addr_base; |
| 19347 | int addr_size; |
| 19348 | |
| 19349 | /* We need addr_base and addr_size. |
| 19350 | If we don't have PER_CU->cu, we have to get it. |
| 19351 | Nasty, but the alternative is storing the needed info in PER_CU, |
| 19352 | which at this point doesn't seem justified: it's not clear how frequently |
| 19353 | it would get used and it would increase the size of every PER_CU. |
| 19354 | Entry points like dwarf2_per_cu_addr_size do a similar thing |
| 19355 | so we're not in uncharted territory here. |
| 19356 | Alas we need to be a bit more complicated as addr_base is contained |
| 19357 | in the DIE. |
| 19358 | |
| 19359 | We don't need to read the entire CU(/TU). |
| 19360 | We just need the header and top level die. |
| 19361 | |
| 19362 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
| 19363 | For now we skip this optimization. */ |
| 19364 | |
| 19365 | if (cu != NULL) |
| 19366 | { |
| 19367 | addr_base = cu->addr_base; |
| 19368 | addr_size = cu->header.addr_size; |
| 19369 | } |
| 19370 | else |
| 19371 | { |
| 19372 | cutu_reader reader (per_cu, NULL, 0, false); |
| 19373 | addr_base = reader.cu->addr_base; |
| 19374 | addr_size = reader.cu->header.addr_size; |
| 19375 | } |
| 19376 | |
| 19377 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
| 19378 | addr_size); |
| 19379 | } |
| 19380 | |
| 19381 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
| 19382 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a |
| 19383 | DWO file. */ |
| 19384 | |
| 19385 | static const char * |
| 19386 | read_str_index (struct dwarf2_cu *cu, |
| 19387 | struct dwarf2_section_info *str_section, |
| 19388 | struct dwarf2_section_info *str_offsets_section, |
| 19389 | ULONGEST str_offsets_base, ULONGEST str_index) |
| 19390 | { |
| 19391 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 19392 | = cu->per_cu->dwarf2_per_objfile; |
| 19393 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 19394 | const char *objf_name = objfile_name (objfile); |
| 19395 | bfd *abfd = objfile->obfd; |
| 19396 | const gdb_byte *info_ptr; |
| 19397 | ULONGEST str_offset; |
| 19398 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
| 19399 | |
| 19400 | str_section->read (objfile); |
| 19401 | str_offsets_section->read (objfile); |
| 19402 | if (str_section->buffer == NULL) |
| 19403 | error (_("%s used without %s section" |
| 19404 | " in CU at offset %s [in module %s]"), |
| 19405 | form_name, str_section->get_name (), |
| 19406 | sect_offset_str (cu->header.sect_off), objf_name); |
| 19407 | if (str_offsets_section->buffer == NULL) |
| 19408 | error (_("%s used without %s section" |
| 19409 | " in CU at offset %s [in module %s]"), |
| 19410 | form_name, str_section->get_name (), |
| 19411 | sect_offset_str (cu->header.sect_off), objf_name); |
| 19412 | info_ptr = (str_offsets_section->buffer |
| 19413 | + str_offsets_base |
| 19414 | + str_index * cu->header.offset_size); |
| 19415 | if (cu->header.offset_size == 4) |
| 19416 | str_offset = bfd_get_32 (abfd, info_ptr); |
| 19417 | else |
| 19418 | str_offset = bfd_get_64 (abfd, info_ptr); |
| 19419 | if (str_offset >= str_section->size) |
| 19420 | error (_("Offset from %s pointing outside of" |
| 19421 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
| 19422 | form_name, sect_offset_str (cu->header.sect_off), objf_name); |
| 19423 | return (const char *) (str_section->buffer + str_offset); |
| 19424 | } |
| 19425 | |
| 19426 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
| 19427 | |
| 19428 | static const char * |
| 19429 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
| 19430 | { |
| 19431 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 |
| 19432 | ? reader->cu->header.addr_size : 0; |
| 19433 | return read_str_index (reader->cu, |
| 19434 | &reader->dwo_file->sections.str, |
| 19435 | &reader->dwo_file->sections.str_offsets, |
| 19436 | str_offsets_base, str_index); |
| 19437 | } |
| 19438 | |
| 19439 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ |
| 19440 | |
| 19441 | static const char * |
| 19442 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) |
| 19443 | { |
| 19444 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 19445 | const char *objf_name = objfile_name (objfile); |
| 19446 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
| 19447 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; |
| 19448 | |
| 19449 | if (!cu->str_offsets_base.has_value ()) |
| 19450 | error (_("%s used in Fission stub without %s" |
| 19451 | " in CU at offset 0x%lx [in module %s]"), |
| 19452 | form_name, str_offsets_attr_name, |
| 19453 | (long) cu->header.offset_size, objf_name); |
| 19454 | |
| 19455 | return read_str_index (cu, |
| 19456 | &cu->per_cu->dwarf2_per_objfile->str, |
| 19457 | &cu->per_cu->dwarf2_per_objfile->str_offsets, |
| 19458 | *cu->str_offsets_base, str_index); |
| 19459 | } |
| 19460 | |
| 19461 | /* Return the length of an LEB128 number in BUF. */ |
| 19462 | |
| 19463 | static int |
| 19464 | leb128_size (const gdb_byte *buf) |
| 19465 | { |
| 19466 | const gdb_byte *begin = buf; |
| 19467 | gdb_byte byte; |
| 19468 | |
| 19469 | while (1) |
| 19470 | { |
| 19471 | byte = *buf++; |
| 19472 | if ((byte & 128) == 0) |
| 19473 | return buf - begin; |
| 19474 | } |
| 19475 | } |
| 19476 | |
| 19477 | static void |
| 19478 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
| 19479 | { |
| 19480 | switch (lang) |
| 19481 | { |
| 19482 | case DW_LANG_C89: |
| 19483 | case DW_LANG_C99: |
| 19484 | case DW_LANG_C11: |
| 19485 | case DW_LANG_C: |
| 19486 | case DW_LANG_UPC: |
| 19487 | cu->language = language_c; |
| 19488 | break; |
| 19489 | case DW_LANG_Java: |
| 19490 | case DW_LANG_C_plus_plus: |
| 19491 | case DW_LANG_C_plus_plus_11: |
| 19492 | case DW_LANG_C_plus_plus_14: |
| 19493 | cu->language = language_cplus; |
| 19494 | break; |
| 19495 | case DW_LANG_D: |
| 19496 | cu->language = language_d; |
| 19497 | break; |
| 19498 | case DW_LANG_Fortran77: |
| 19499 | case DW_LANG_Fortran90: |
| 19500 | case DW_LANG_Fortran95: |
| 19501 | case DW_LANG_Fortran03: |
| 19502 | case DW_LANG_Fortran08: |
| 19503 | cu->language = language_fortran; |
| 19504 | break; |
| 19505 | case DW_LANG_Go: |
| 19506 | cu->language = language_go; |
| 19507 | break; |
| 19508 | case DW_LANG_Mips_Assembler: |
| 19509 | cu->language = language_asm; |
| 19510 | break; |
| 19511 | case DW_LANG_Ada83: |
| 19512 | case DW_LANG_Ada95: |
| 19513 | cu->language = language_ada; |
| 19514 | break; |
| 19515 | case DW_LANG_Modula2: |
| 19516 | cu->language = language_m2; |
| 19517 | break; |
| 19518 | case DW_LANG_Pascal83: |
| 19519 | cu->language = language_pascal; |
| 19520 | break; |
| 19521 | case DW_LANG_ObjC: |
| 19522 | cu->language = language_objc; |
| 19523 | break; |
| 19524 | case DW_LANG_Rust: |
| 19525 | case DW_LANG_Rust_old: |
| 19526 | cu->language = language_rust; |
| 19527 | break; |
| 19528 | case DW_LANG_Cobol74: |
| 19529 | case DW_LANG_Cobol85: |
| 19530 | default: |
| 19531 | cu->language = language_minimal; |
| 19532 | break; |
| 19533 | } |
| 19534 | cu->language_defn = language_def (cu->language); |
| 19535 | } |
| 19536 | |
| 19537 | /* Return the named attribute or NULL if not there. */ |
| 19538 | |
| 19539 | static struct attribute * |
| 19540 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
| 19541 | { |
| 19542 | for (;;) |
| 19543 | { |
| 19544 | unsigned int i; |
| 19545 | struct attribute *spec = NULL; |
| 19546 | |
| 19547 | for (i = 0; i < die->num_attrs; ++i) |
| 19548 | { |
| 19549 | if (die->attrs[i].name == name) |
| 19550 | return &die->attrs[i]; |
| 19551 | if (die->attrs[i].name == DW_AT_specification |
| 19552 | || die->attrs[i].name == DW_AT_abstract_origin) |
| 19553 | spec = &die->attrs[i]; |
| 19554 | } |
| 19555 | |
| 19556 | if (!spec) |
| 19557 | break; |
| 19558 | |
| 19559 | die = follow_die_ref (die, spec, &cu); |
| 19560 | } |
| 19561 | |
| 19562 | return NULL; |
| 19563 | } |
| 19564 | |
| 19565 | /* Return the string associated with a string-typed attribute, or NULL if it |
| 19566 | is either not found or is of an incorrect type. */ |
| 19567 | |
| 19568 | static const char * |
| 19569 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
| 19570 | { |
| 19571 | struct attribute *attr; |
| 19572 | const char *str = NULL; |
| 19573 | |
| 19574 | attr = dwarf2_attr (die, name, cu); |
| 19575 | |
| 19576 | if (attr != NULL) |
| 19577 | { |
| 19578 | str = attr->value_as_string (); |
| 19579 | if (str == nullptr) |
| 19580 | complaint (_("string type expected for attribute %s for " |
| 19581 | "DIE at %s in module %s"), |
| 19582 | dwarf_attr_name (name), sect_offset_str (die->sect_off), |
| 19583 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 19584 | } |
| 19585 | |
| 19586 | return str; |
| 19587 | } |
| 19588 | |
| 19589 | /* Return the dwo name or NULL if not present. If present, it is in either |
| 19590 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
| 19591 | static const char * |
| 19592 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) |
| 19593 | { |
| 19594 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); |
| 19595 | if (dwo_name == nullptr) |
| 19596 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); |
| 19597 | return dwo_name; |
| 19598 | } |
| 19599 | |
| 19600 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
| 19601 | and holds a non-zero value. This function should only be used for |
| 19602 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
| 19603 | |
| 19604 | static int |
| 19605 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) |
| 19606 | { |
| 19607 | struct attribute *attr = dwarf2_attr (die, name, cu); |
| 19608 | |
| 19609 | return (attr && DW_UNSND (attr)); |
| 19610 | } |
| 19611 | |
| 19612 | static int |
| 19613 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
| 19614 | { |
| 19615 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
| 19616 | which value is non-zero. However, we have to be careful with |
| 19617 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() |
| 19618 | (via dwarf2_flag_true_p) follows this attribute. So we may |
| 19619 | end up accidently finding a declaration attribute that belongs |
| 19620 | to a different DIE referenced by the specification attribute, |
| 19621 | even though the given DIE does not have a declaration attribute. */ |
| 19622 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) |
| 19623 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); |
| 19624 | } |
| 19625 | |
| 19626 | /* Return the die giving the specification for DIE, if there is |
| 19627 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
| 19628 | containing the return value on output. If there is no |
| 19629 | specification, but there is an abstract origin, that is |
| 19630 | returned. */ |
| 19631 | |
| 19632 | static struct die_info * |
| 19633 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
| 19634 | { |
| 19635 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
| 19636 | *spec_cu); |
| 19637 | |
| 19638 | if (spec_attr == NULL) |
| 19639 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); |
| 19640 | |
| 19641 | if (spec_attr == NULL) |
| 19642 | return NULL; |
| 19643 | else |
| 19644 | return follow_die_ref (die, spec_attr, spec_cu); |
| 19645 | } |
| 19646 | |
| 19647 | /* Stub for free_line_header to match void * callback types. */ |
| 19648 | |
| 19649 | static void |
| 19650 | free_line_header_voidp (void *arg) |
| 19651 | { |
| 19652 | struct line_header *lh = (struct line_header *) arg; |
| 19653 | |
| 19654 | delete lh; |
| 19655 | } |
| 19656 | |
| 19657 | /* A convenience function to find the proper .debug_line section for a CU. */ |
| 19658 | |
| 19659 | static struct dwarf2_section_info * |
| 19660 | get_debug_line_section (struct dwarf2_cu *cu) |
| 19661 | { |
| 19662 | struct dwarf2_section_info *section; |
| 19663 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 19664 | = cu->per_cu->dwarf2_per_objfile; |
| 19665 | |
| 19666 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the |
| 19667 | DWO file. */ |
| 19668 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
| 19669 | section = &cu->dwo_unit->dwo_file->sections.line; |
| 19670 | else if (cu->per_cu->is_dwz) |
| 19671 | { |
| 19672 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 19673 | |
| 19674 | section = &dwz->line; |
| 19675 | } |
| 19676 | else |
| 19677 | section = &dwarf2_per_objfile->line; |
| 19678 | |
| 19679 | return section; |
| 19680 | } |
| 19681 | |
| 19682 | /* Read the statement program header starting at OFFSET in |
| 19683 | .debug_line, or .debug_line.dwo. Return a pointer |
| 19684 | to a struct line_header, allocated using xmalloc. |
| 19685 | Returns NULL if there is a problem reading the header, e.g., if it |
| 19686 | has a version we don't understand. |
| 19687 | |
| 19688 | NOTE: the strings in the include directory and file name tables of |
| 19689 | the returned object point into the dwarf line section buffer, |
| 19690 | and must not be freed. */ |
| 19691 | |
| 19692 | static line_header_up |
| 19693 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
| 19694 | { |
| 19695 | struct dwarf2_section_info *section; |
| 19696 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 19697 | = cu->per_cu->dwarf2_per_objfile; |
| 19698 | |
| 19699 | section = get_debug_line_section (cu); |
| 19700 | section->read (dwarf2_per_objfile->objfile); |
| 19701 | if (section->buffer == NULL) |
| 19702 | { |
| 19703 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
| 19704 | complaint (_("missing .debug_line.dwo section")); |
| 19705 | else |
| 19706 | complaint (_("missing .debug_line section")); |
| 19707 | return 0; |
| 19708 | } |
| 19709 | |
| 19710 | return dwarf_decode_line_header (sect_off, cu->per_cu->is_dwz, |
| 19711 | dwarf2_per_objfile, section, |
| 19712 | &cu->header); |
| 19713 | } |
| 19714 | |
| 19715 | /* Subroutine of dwarf_decode_lines to simplify it. |
| 19716 | Return the file name of the psymtab for the given file_entry. |
| 19717 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
| 19718 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
| 19719 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ |
| 19720 | |
| 19721 | static const char * |
| 19722 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
| 19723 | const dwarf2_psymtab *pst, |
| 19724 | const char *comp_dir, |
| 19725 | gdb::unique_xmalloc_ptr<char> *name_holder) |
| 19726 | { |
| 19727 | const char *include_name = fe.name; |
| 19728 | const char *include_name_to_compare = include_name; |
| 19729 | const char *pst_filename; |
| 19730 | int file_is_pst; |
| 19731 | |
| 19732 | const char *dir_name = fe.include_dir (lh); |
| 19733 | |
| 19734 | gdb::unique_xmalloc_ptr<char> hold_compare; |
| 19735 | if (!IS_ABSOLUTE_PATH (include_name) |
| 19736 | && (dir_name != NULL || comp_dir != NULL)) |
| 19737 | { |
| 19738 | /* Avoid creating a duplicate psymtab for PST. |
| 19739 | We do this by comparing INCLUDE_NAME and PST_FILENAME. |
| 19740 | Before we do the comparison, however, we need to account |
| 19741 | for DIR_NAME and COMP_DIR. |
| 19742 | First prepend dir_name (if non-NULL). If we still don't |
| 19743 | have an absolute path prepend comp_dir (if non-NULL). |
| 19744 | However, the directory we record in the include-file's |
| 19745 | psymtab does not contain COMP_DIR (to match the |
| 19746 | corresponding symtab(s)). |
| 19747 | |
| 19748 | Example: |
| 19749 | |
| 19750 | bash$ cd /tmp |
| 19751 | bash$ gcc -g ./hello.c |
| 19752 | include_name = "hello.c" |
| 19753 | dir_name = "." |
| 19754 | DW_AT_comp_dir = comp_dir = "/tmp" |
| 19755 | DW_AT_name = "./hello.c" |
| 19756 | |
| 19757 | */ |
| 19758 | |
| 19759 | if (dir_name != NULL) |
| 19760 | { |
| 19761 | name_holder->reset (concat (dir_name, SLASH_STRING, |
| 19762 | include_name, (char *) NULL)); |
| 19763 | include_name = name_holder->get (); |
| 19764 | include_name_to_compare = include_name; |
| 19765 | } |
| 19766 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) |
| 19767 | { |
| 19768 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
| 19769 | include_name, (char *) NULL)); |
| 19770 | include_name_to_compare = hold_compare.get (); |
| 19771 | } |
| 19772 | } |
| 19773 | |
| 19774 | pst_filename = pst->filename; |
| 19775 | gdb::unique_xmalloc_ptr<char> copied_name; |
| 19776 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
| 19777 | { |
| 19778 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
| 19779 | pst_filename, (char *) NULL)); |
| 19780 | pst_filename = copied_name.get (); |
| 19781 | } |
| 19782 | |
| 19783 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
| 19784 | |
| 19785 | if (file_is_pst) |
| 19786 | return NULL; |
| 19787 | return include_name; |
| 19788 | } |
| 19789 | |
| 19790 | /* State machine to track the state of the line number program. */ |
| 19791 | |
| 19792 | class lnp_state_machine |
| 19793 | { |
| 19794 | public: |
| 19795 | /* Initialize a machine state for the start of a line number |
| 19796 | program. */ |
| 19797 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
| 19798 | bool record_lines_p); |
| 19799 | |
| 19800 | file_entry *current_file () |
| 19801 | { |
| 19802 | /* lh->file_names is 0-based, but the file name numbers in the |
| 19803 | statement program are 1-based. */ |
| 19804 | return m_line_header->file_name_at (m_file); |
| 19805 | } |
| 19806 | |
| 19807 | /* Record the line in the state machine. END_SEQUENCE is true if |
| 19808 | we're processing the end of a sequence. */ |
| 19809 | void record_line (bool end_sequence); |
| 19810 | |
| 19811 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
| 19812 | nop-out rest of the lines in this sequence. */ |
| 19813 | void check_line_address (struct dwarf2_cu *cu, |
| 19814 | const gdb_byte *line_ptr, |
| 19815 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
| 19816 | |
| 19817 | void handle_set_discriminator (unsigned int discriminator) |
| 19818 | { |
| 19819 | m_discriminator = discriminator; |
| 19820 | m_line_has_non_zero_discriminator |= discriminator != 0; |
| 19821 | } |
| 19822 | |
| 19823 | /* Handle DW_LNE_set_address. */ |
| 19824 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) |
| 19825 | { |
| 19826 | m_op_index = 0; |
| 19827 | address += baseaddr; |
| 19828 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); |
| 19829 | } |
| 19830 | |
| 19831 | /* Handle DW_LNS_advance_pc. */ |
| 19832 | void handle_advance_pc (CORE_ADDR adjust); |
| 19833 | |
| 19834 | /* Handle a special opcode. */ |
| 19835 | void handle_special_opcode (unsigned char op_code); |
| 19836 | |
| 19837 | /* Handle DW_LNS_advance_line. */ |
| 19838 | void handle_advance_line (int line_delta) |
| 19839 | { |
| 19840 | advance_line (line_delta); |
| 19841 | } |
| 19842 | |
| 19843 | /* Handle DW_LNS_set_file. */ |
| 19844 | void handle_set_file (file_name_index file); |
| 19845 | |
| 19846 | /* Handle DW_LNS_negate_stmt. */ |
| 19847 | void handle_negate_stmt () |
| 19848 | { |
| 19849 | m_is_stmt = !m_is_stmt; |
| 19850 | } |
| 19851 | |
| 19852 | /* Handle DW_LNS_const_add_pc. */ |
| 19853 | void handle_const_add_pc (); |
| 19854 | |
| 19855 | /* Handle DW_LNS_fixed_advance_pc. */ |
| 19856 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) |
| 19857 | { |
| 19858 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 19859 | m_op_index = 0; |
| 19860 | } |
| 19861 | |
| 19862 | /* Handle DW_LNS_copy. */ |
| 19863 | void handle_copy () |
| 19864 | { |
| 19865 | record_line (false); |
| 19866 | m_discriminator = 0; |
| 19867 | } |
| 19868 | |
| 19869 | /* Handle DW_LNE_end_sequence. */ |
| 19870 | void handle_end_sequence () |
| 19871 | { |
| 19872 | m_currently_recording_lines = true; |
| 19873 | } |
| 19874 | |
| 19875 | private: |
| 19876 | /* Advance the line by LINE_DELTA. */ |
| 19877 | void advance_line (int line_delta) |
| 19878 | { |
| 19879 | m_line += line_delta; |
| 19880 | |
| 19881 | if (line_delta != 0) |
| 19882 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
| 19883 | } |
| 19884 | |
| 19885 | struct dwarf2_cu *m_cu; |
| 19886 | |
| 19887 | gdbarch *m_gdbarch; |
| 19888 | |
| 19889 | /* True if we're recording lines. |
| 19890 | Otherwise we're building partial symtabs and are just interested in |
| 19891 | finding include files mentioned by the line number program. */ |
| 19892 | bool m_record_lines_p; |
| 19893 | |
| 19894 | /* The line number header. */ |
| 19895 | line_header *m_line_header; |
| 19896 | |
| 19897 | /* These are part of the standard DWARF line number state machine, |
| 19898 | and initialized according to the DWARF spec. */ |
| 19899 | |
| 19900 | unsigned char m_op_index = 0; |
| 19901 | /* The line table index of the current file. */ |
| 19902 | file_name_index m_file = 1; |
| 19903 | unsigned int m_line = 1; |
| 19904 | |
| 19905 | /* These are initialized in the constructor. */ |
| 19906 | |
| 19907 | CORE_ADDR m_address; |
| 19908 | bool m_is_stmt; |
| 19909 | unsigned int m_discriminator; |
| 19910 | |
| 19911 | /* Additional bits of state we need to track. */ |
| 19912 | |
| 19913 | /* The last file that we called dwarf2_start_subfile for. |
| 19914 | This is only used for TLLs. */ |
| 19915 | unsigned int m_last_file = 0; |
| 19916 | /* The last file a line number was recorded for. */ |
| 19917 | struct subfile *m_last_subfile = NULL; |
| 19918 | |
| 19919 | /* When true, record the lines we decode. */ |
| 19920 | bool m_currently_recording_lines = false; |
| 19921 | |
| 19922 | /* The last line number that was recorded, used to coalesce |
| 19923 | consecutive entries for the same line. This can happen, for |
| 19924 | example, when discriminators are present. PR 17276. */ |
| 19925 | unsigned int m_last_line = 0; |
| 19926 | bool m_line_has_non_zero_discriminator = false; |
| 19927 | }; |
| 19928 | |
| 19929 | void |
| 19930 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) |
| 19931 | { |
| 19932 | CORE_ADDR addr_adj = (((m_op_index + adjust) |
| 19933 | / m_line_header->maximum_ops_per_instruction) |
| 19934 | * m_line_header->minimum_instruction_length); |
| 19935 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 19936 | m_op_index = ((m_op_index + adjust) |
| 19937 | % m_line_header->maximum_ops_per_instruction); |
| 19938 | } |
| 19939 | |
| 19940 | void |
| 19941 | lnp_state_machine::handle_special_opcode (unsigned char op_code) |
| 19942 | { |
| 19943 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
| 19944 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
| 19945 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; |
| 19946 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) |
| 19947 | / m_line_header->maximum_ops_per_instruction) |
| 19948 | * m_line_header->minimum_instruction_length); |
| 19949 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 19950 | m_op_index = ((m_op_index + adj_opcode_d) |
| 19951 | % m_line_header->maximum_ops_per_instruction); |
| 19952 | |
| 19953 | int line_delta = m_line_header->line_base + adj_opcode_r; |
| 19954 | advance_line (line_delta); |
| 19955 | record_line (false); |
| 19956 | m_discriminator = 0; |
| 19957 | } |
| 19958 | |
| 19959 | void |
| 19960 | lnp_state_machine::handle_set_file (file_name_index file) |
| 19961 | { |
| 19962 | m_file = file; |
| 19963 | |
| 19964 | const file_entry *fe = current_file (); |
| 19965 | if (fe == NULL) |
| 19966 | dwarf2_debug_line_missing_file_complaint (); |
| 19967 | else if (m_record_lines_p) |
| 19968 | { |
| 19969 | const char *dir = fe->include_dir (m_line_header); |
| 19970 | |
| 19971 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
| 19972 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
| 19973 | dwarf2_start_subfile (m_cu, fe->name, dir); |
| 19974 | } |
| 19975 | } |
| 19976 | |
| 19977 | void |
| 19978 | lnp_state_machine::handle_const_add_pc () |
| 19979 | { |
| 19980 | CORE_ADDR adjust |
| 19981 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; |
| 19982 | |
| 19983 | CORE_ADDR addr_adj |
| 19984 | = (((m_op_index + adjust) |
| 19985 | / m_line_header->maximum_ops_per_instruction) |
| 19986 | * m_line_header->minimum_instruction_length); |
| 19987 | |
| 19988 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 19989 | m_op_index = ((m_op_index + adjust) |
| 19990 | % m_line_header->maximum_ops_per_instruction); |
| 19991 | } |
| 19992 | |
| 19993 | /* Return non-zero if we should add LINE to the line number table. |
| 19994 | LINE is the line to add, LAST_LINE is the last line that was added, |
| 19995 | LAST_SUBFILE is the subfile for LAST_LINE. |
| 19996 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever |
| 19997 | had a non-zero discriminator. |
| 19998 | |
| 19999 | We have to be careful in the presence of discriminators. |
| 20000 | E.g., for this line: |
| 20001 | |
| 20002 | for (i = 0; i < 100000; i++); |
| 20003 | |
| 20004 | clang can emit four line number entries for that one line, |
| 20005 | each with a different discriminator. |
| 20006 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. |
| 20007 | |
| 20008 | However, we want gdb to coalesce all four entries into one. |
| 20009 | Otherwise the user could stepi into the middle of the line and |
| 20010 | gdb would get confused about whether the pc really was in the |
| 20011 | middle of the line. |
| 20012 | |
| 20013 | Things are further complicated by the fact that two consecutive |
| 20014 | line number entries for the same line is a heuristic used by gcc |
| 20015 | to denote the end of the prologue. So we can't just discard duplicate |
| 20016 | entries, we have to be selective about it. The heuristic we use is |
| 20017 | that we only collapse consecutive entries for the same line if at least |
| 20018 | one of those entries has a non-zero discriminator. PR 17276. |
| 20019 | |
| 20020 | Note: Addresses in the line number state machine can never go backwards |
| 20021 | within one sequence, thus this coalescing is ok. */ |
| 20022 | |
| 20023 | static int |
| 20024 | dwarf_record_line_p (struct dwarf2_cu *cu, |
| 20025 | unsigned int line, unsigned int last_line, |
| 20026 | int line_has_non_zero_discriminator, |
| 20027 | struct subfile *last_subfile) |
| 20028 | { |
| 20029 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
| 20030 | return 1; |
| 20031 | if (line != last_line) |
| 20032 | return 1; |
| 20033 | /* Same line for the same file that we've seen already. |
| 20034 | As a last check, for pr 17276, only record the line if the line |
| 20035 | has never had a non-zero discriminator. */ |
| 20036 | if (!line_has_non_zero_discriminator) |
| 20037 | return 1; |
| 20038 | return 0; |
| 20039 | } |
| 20040 | |
| 20041 | /* Use the CU's builder to record line number LINE beginning at |
| 20042 | address ADDRESS in the line table of subfile SUBFILE. */ |
| 20043 | |
| 20044 | static void |
| 20045 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
| 20046 | unsigned int line, CORE_ADDR address, bool is_stmt, |
| 20047 | struct dwarf2_cu *cu) |
| 20048 | { |
| 20049 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); |
| 20050 | |
| 20051 | if (dwarf_line_debug) |
| 20052 | { |
| 20053 | fprintf_unfiltered (gdb_stdlog, |
| 20054 | "Recording line %u, file %s, address %s\n", |
| 20055 | line, lbasename (subfile->name), |
| 20056 | paddress (gdbarch, address)); |
| 20057 | } |
| 20058 | |
| 20059 | if (cu != nullptr) |
| 20060 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
| 20061 | } |
| 20062 | |
| 20063 | /* Subroutine of dwarf_decode_lines_1 to simplify it. |
| 20064 | Mark the end of a set of line number records. |
| 20065 | The arguments are the same as for dwarf_record_line_1. |
| 20066 | If SUBFILE is NULL the request is ignored. */ |
| 20067 | |
| 20068 | static void |
| 20069 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, |
| 20070 | CORE_ADDR address, struct dwarf2_cu *cu) |
| 20071 | { |
| 20072 | if (subfile == NULL) |
| 20073 | return; |
| 20074 | |
| 20075 | if (dwarf_line_debug) |
| 20076 | { |
| 20077 | fprintf_unfiltered (gdb_stdlog, |
| 20078 | "Finishing current line, file %s, address %s\n", |
| 20079 | lbasename (subfile->name), |
| 20080 | paddress (gdbarch, address)); |
| 20081 | } |
| 20082 | |
| 20083 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
| 20084 | } |
| 20085 | |
| 20086 | void |
| 20087 | lnp_state_machine::record_line (bool end_sequence) |
| 20088 | { |
| 20089 | if (dwarf_line_debug) |
| 20090 | { |
| 20091 | fprintf_unfiltered (gdb_stdlog, |
| 20092 | "Processing actual line %u: file %u," |
| 20093 | " address %s, is_stmt %u, discrim %u%s\n", |
| 20094 | m_line, m_file, |
| 20095 | paddress (m_gdbarch, m_address), |
| 20096 | m_is_stmt, m_discriminator, |
| 20097 | (end_sequence ? "\t(end sequence)" : "")); |
| 20098 | } |
| 20099 | |
| 20100 | file_entry *fe = current_file (); |
| 20101 | |
| 20102 | if (fe == NULL) |
| 20103 | dwarf2_debug_line_missing_file_complaint (); |
| 20104 | /* For now we ignore lines not starting on an instruction boundary. |
| 20105 | But not when processing end_sequence for compatibility with the |
| 20106 | previous version of the code. */ |
| 20107 | else if (m_op_index == 0 || end_sequence) |
| 20108 | { |
| 20109 | fe->included_p = 1; |
| 20110 | if (m_record_lines_p) |
| 20111 | { |
| 20112 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
| 20113 | || end_sequence) |
| 20114 | { |
| 20115 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
| 20116 | m_currently_recording_lines ? m_cu : nullptr); |
| 20117 | } |
| 20118 | |
| 20119 | if (!end_sequence) |
| 20120 | { |
| 20121 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
| 20122 | |
| 20123 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
| 20124 | m_line_has_non_zero_discriminator, |
| 20125 | m_last_subfile)) |
| 20126 | { |
| 20127 | buildsym_compunit *builder = m_cu->get_builder (); |
| 20128 | dwarf_record_line_1 (m_gdbarch, |
| 20129 | builder->get_current_subfile (), |
| 20130 | m_line, m_address, is_stmt, |
| 20131 | m_currently_recording_lines ? m_cu : nullptr); |
| 20132 | } |
| 20133 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
| 20134 | m_last_line = m_line; |
| 20135 | } |
| 20136 | } |
| 20137 | } |
| 20138 | } |
| 20139 | |
| 20140 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
| 20141 | line_header *lh, bool record_lines_p) |
| 20142 | { |
| 20143 | m_cu = cu; |
| 20144 | m_gdbarch = arch; |
| 20145 | m_record_lines_p = record_lines_p; |
| 20146 | m_line_header = lh; |
| 20147 | |
| 20148 | m_currently_recording_lines = true; |
| 20149 | |
| 20150 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
| 20151 | was a line entry for it so that the backend has a chance to adjust it |
| 20152 | and also record it in case it needs it. This is currently used by MIPS |
| 20153 | code, cf. `mips_adjust_dwarf2_line'. */ |
| 20154 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
| 20155 | m_is_stmt = lh->default_is_stmt; |
| 20156 | m_discriminator = 0; |
| 20157 | } |
| 20158 | |
| 20159 | void |
| 20160 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, |
| 20161 | const gdb_byte *line_ptr, |
| 20162 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
| 20163 | { |
| 20164 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
| 20165 | the pc range of the CU. However, we restrict the test to only ADDRESS |
| 20166 | values of zero to preserve GDB's previous behaviour which is to handle |
| 20167 | the specific case of a function being GC'd by the linker. */ |
| 20168 | |
| 20169 | if (address == 0 && address < unrelocated_lowpc) |
| 20170 | { |
| 20171 | /* This line table is for a function which has been |
| 20172 | GCd by the linker. Ignore it. PR gdb/12528 */ |
| 20173 | |
| 20174 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20175 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
| 20176 | |
| 20177 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
| 20178 | line_offset, objfile_name (objfile)); |
| 20179 | m_currently_recording_lines = false; |
| 20180 | /* Note: m_currently_recording_lines is left as false until we see |
| 20181 | DW_LNE_end_sequence. */ |
| 20182 | } |
| 20183 | } |
| 20184 | |
| 20185 | /* Subroutine of dwarf_decode_lines to simplify it. |
| 20186 | Process the line number information in LH. |
| 20187 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number |
| 20188 | program in order to set included_p for every referenced header. */ |
| 20189 | |
| 20190 | static void |
| 20191 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
| 20192 | const int decode_for_pst_p, CORE_ADDR lowpc) |
| 20193 | { |
| 20194 | const gdb_byte *line_ptr, *extended_end; |
| 20195 | const gdb_byte *line_end; |
| 20196 | unsigned int bytes_read, extended_len; |
| 20197 | unsigned char op_code, extended_op; |
| 20198 | CORE_ADDR baseaddr; |
| 20199 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20200 | bfd *abfd = objfile->obfd; |
| 20201 | struct gdbarch *gdbarch = objfile->arch (); |
| 20202 | /* True if we're recording line info (as opposed to building partial |
| 20203 | symtabs and just interested in finding include files mentioned by |
| 20204 | the line number program). */ |
| 20205 | bool record_lines_p = !decode_for_pst_p; |
| 20206 | |
| 20207 | baseaddr = objfile->text_section_offset (); |
| 20208 | |
| 20209 | line_ptr = lh->statement_program_start; |
| 20210 | line_end = lh->statement_program_end; |
| 20211 | |
| 20212 | /* Read the statement sequences until there's nothing left. */ |
| 20213 | while (line_ptr < line_end) |
| 20214 | { |
| 20215 | /* The DWARF line number program state machine. Reset the state |
| 20216 | machine at the start of each sequence. */ |
| 20217 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
| 20218 | bool end_sequence = false; |
| 20219 | |
| 20220 | if (record_lines_p) |
| 20221 | { |
| 20222 | /* Start a subfile for the current file of the state |
| 20223 | machine. */ |
| 20224 | const file_entry *fe = state_machine.current_file (); |
| 20225 | |
| 20226 | if (fe != NULL) |
| 20227 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
| 20228 | } |
| 20229 | |
| 20230 | /* Decode the table. */ |
| 20231 | while (line_ptr < line_end && !end_sequence) |
| 20232 | { |
| 20233 | op_code = read_1_byte (abfd, line_ptr); |
| 20234 | line_ptr += 1; |
| 20235 | |
| 20236 | if (op_code >= lh->opcode_base) |
| 20237 | { |
| 20238 | /* Special opcode. */ |
| 20239 | state_machine.handle_special_opcode (op_code); |
| 20240 | } |
| 20241 | else switch (op_code) |
| 20242 | { |
| 20243 | case DW_LNS_extended_op: |
| 20244 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
| 20245 | &bytes_read); |
| 20246 | line_ptr += bytes_read; |
| 20247 | extended_end = line_ptr + extended_len; |
| 20248 | extended_op = read_1_byte (abfd, line_ptr); |
| 20249 | line_ptr += 1; |
| 20250 | switch (extended_op) |
| 20251 | { |
| 20252 | case DW_LNE_end_sequence: |
| 20253 | state_machine.handle_end_sequence (); |
| 20254 | end_sequence = true; |
| 20255 | break; |
| 20256 | case DW_LNE_set_address: |
| 20257 | { |
| 20258 | CORE_ADDR address |
| 20259 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
| 20260 | line_ptr += bytes_read; |
| 20261 | |
| 20262 | state_machine.check_line_address (cu, line_ptr, |
| 20263 | lowpc - baseaddr, address); |
| 20264 | state_machine.handle_set_address (baseaddr, address); |
| 20265 | } |
| 20266 | break; |
| 20267 | case DW_LNE_define_file: |
| 20268 | { |
| 20269 | const char *cur_file; |
| 20270 | unsigned int mod_time, length; |
| 20271 | dir_index dindex; |
| 20272 | |
| 20273 | cur_file = read_direct_string (abfd, line_ptr, |
| 20274 | &bytes_read); |
| 20275 | line_ptr += bytes_read; |
| 20276 | dindex = (dir_index) |
| 20277 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20278 | line_ptr += bytes_read; |
| 20279 | mod_time = |
| 20280 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20281 | line_ptr += bytes_read; |
| 20282 | length = |
| 20283 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20284 | line_ptr += bytes_read; |
| 20285 | lh->add_file_name (cur_file, dindex, mod_time, length); |
| 20286 | } |
| 20287 | break; |
| 20288 | case DW_LNE_set_discriminator: |
| 20289 | { |
| 20290 | /* The discriminator is not interesting to the |
| 20291 | debugger; just ignore it. We still need to |
| 20292 | check its value though: |
| 20293 | if there are consecutive entries for the same |
| 20294 | (non-prologue) line we want to coalesce them. |
| 20295 | PR 17276. */ |
| 20296 | unsigned int discr |
| 20297 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20298 | line_ptr += bytes_read; |
| 20299 | |
| 20300 | state_machine.handle_set_discriminator (discr); |
| 20301 | } |
| 20302 | break; |
| 20303 | default: |
| 20304 | complaint (_("mangled .debug_line section")); |
| 20305 | return; |
| 20306 | } |
| 20307 | /* Make sure that we parsed the extended op correctly. If e.g. |
| 20308 | we expected a different address size than the producer used, |
| 20309 | we may have read the wrong number of bytes. */ |
| 20310 | if (line_ptr != extended_end) |
| 20311 | { |
| 20312 | complaint (_("mangled .debug_line section")); |
| 20313 | return; |
| 20314 | } |
| 20315 | break; |
| 20316 | case DW_LNS_copy: |
| 20317 | state_machine.handle_copy (); |
| 20318 | break; |
| 20319 | case DW_LNS_advance_pc: |
| 20320 | { |
| 20321 | CORE_ADDR adjust |
| 20322 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20323 | line_ptr += bytes_read; |
| 20324 | |
| 20325 | state_machine.handle_advance_pc (adjust); |
| 20326 | } |
| 20327 | break; |
| 20328 | case DW_LNS_advance_line: |
| 20329 | { |
| 20330 | int line_delta |
| 20331 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); |
| 20332 | line_ptr += bytes_read; |
| 20333 | |
| 20334 | state_machine.handle_advance_line (line_delta); |
| 20335 | } |
| 20336 | break; |
| 20337 | case DW_LNS_set_file: |
| 20338 | { |
| 20339 | file_name_index file |
| 20340 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
| 20341 | &bytes_read); |
| 20342 | line_ptr += bytes_read; |
| 20343 | |
| 20344 | state_machine.handle_set_file (file); |
| 20345 | } |
| 20346 | break; |
| 20347 | case DW_LNS_set_column: |
| 20348 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20349 | line_ptr += bytes_read; |
| 20350 | break; |
| 20351 | case DW_LNS_negate_stmt: |
| 20352 | state_machine.handle_negate_stmt (); |
| 20353 | break; |
| 20354 | case DW_LNS_set_basic_block: |
| 20355 | break; |
| 20356 | /* Add to the address register of the state machine the |
| 20357 | address increment value corresponding to special opcode |
| 20358 | 255. I.e., this value is scaled by the minimum |
| 20359 | instruction length since special opcode 255 would have |
| 20360 | scaled the increment. */ |
| 20361 | case DW_LNS_const_add_pc: |
| 20362 | state_machine.handle_const_add_pc (); |
| 20363 | break; |
| 20364 | case DW_LNS_fixed_advance_pc: |
| 20365 | { |
| 20366 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
| 20367 | line_ptr += 2; |
| 20368 | |
| 20369 | state_machine.handle_fixed_advance_pc (addr_adj); |
| 20370 | } |
| 20371 | break; |
| 20372 | default: |
| 20373 | { |
| 20374 | /* Unknown standard opcode, ignore it. */ |
| 20375 | int i; |
| 20376 | |
| 20377 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
| 20378 | { |
| 20379 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20380 | line_ptr += bytes_read; |
| 20381 | } |
| 20382 | } |
| 20383 | } |
| 20384 | } |
| 20385 | |
| 20386 | if (!end_sequence) |
| 20387 | dwarf2_debug_line_missing_end_sequence_complaint (); |
| 20388 | |
| 20389 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, |
| 20390 | in which case we still finish recording the last line). */ |
| 20391 | state_machine.record_line (true); |
| 20392 | } |
| 20393 | } |
| 20394 | |
| 20395 | /* Decode the Line Number Program (LNP) for the given line_header |
| 20396 | structure and CU. The actual information extracted and the type |
| 20397 | of structures created from the LNP depends on the value of PST. |
| 20398 | |
| 20399 | 1. If PST is NULL, then this procedure uses the data from the program |
| 20400 | to create all necessary symbol tables, and their linetables. |
| 20401 | |
| 20402 | 2. If PST is not NULL, this procedure reads the program to determine |
| 20403 | the list of files included by the unit represented by PST, and |
| 20404 | builds all the associated partial symbol tables. |
| 20405 | |
| 20406 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
| 20407 | It is used for relative paths in the line table. |
| 20408 | NOTE: When processing partial symtabs (pst != NULL), |
| 20409 | comp_dir == pst->dirname. |
| 20410 | |
| 20411 | NOTE: It is important that psymtabs have the same file name (via strcmp) |
| 20412 | as the corresponding symtab. Since COMP_DIR is not used in the name of the |
| 20413 | symtab we don't use it in the name of the psymtabs we create. |
| 20414 | E.g. expand_line_sal requires this when finding psymtabs to expand. |
| 20415 | A good testcase for this is mb-inline.exp. |
| 20416 | |
| 20417 | LOWPC is the lowest address in CU (or 0 if not known). |
| 20418 | |
| 20419 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line |
| 20420 | for its PC<->lines mapping information. Otherwise only the filename |
| 20421 | table is read in. */ |
| 20422 | |
| 20423 | static void |
| 20424 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, |
| 20425 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
| 20426 | CORE_ADDR lowpc, int decode_mapping) |
| 20427 | { |
| 20428 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20429 | const int decode_for_pst_p = (pst != NULL); |
| 20430 | |
| 20431 | if (decode_mapping) |
| 20432 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); |
| 20433 | |
| 20434 | if (decode_for_pst_p) |
| 20435 | { |
| 20436 | /* Now that we're done scanning the Line Header Program, we can |
| 20437 | create the psymtab of each included file. */ |
| 20438 | for (auto &file_entry : lh->file_names ()) |
| 20439 | if (file_entry.included_p == 1) |
| 20440 | { |
| 20441 | gdb::unique_xmalloc_ptr<char> name_holder; |
| 20442 | const char *include_name = |
| 20443 | psymtab_include_file_name (lh, file_entry, pst, |
| 20444 | comp_dir, &name_holder); |
| 20445 | if (include_name != NULL) |
| 20446 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
| 20447 | } |
| 20448 | } |
| 20449 | else |
| 20450 | { |
| 20451 | /* Make sure a symtab is created for every file, even files |
| 20452 | which contain only variables (i.e. no code with associated |
| 20453 | line numbers). */ |
| 20454 | buildsym_compunit *builder = cu->get_builder (); |
| 20455 | struct compunit_symtab *cust = builder->get_compunit_symtab (); |
| 20456 | |
| 20457 | for (auto &fe : lh->file_names ()) |
| 20458 | { |
| 20459 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
| 20460 | if (builder->get_current_subfile ()->symtab == NULL) |
| 20461 | { |
| 20462 | builder->get_current_subfile ()->symtab |
| 20463 | = allocate_symtab (cust, |
| 20464 | builder->get_current_subfile ()->name); |
| 20465 | } |
| 20466 | fe.symtab = builder->get_current_subfile ()->symtab; |
| 20467 | } |
| 20468 | } |
| 20469 | } |
| 20470 | |
| 20471 | /* Start a subfile for DWARF. FILENAME is the name of the file and |
| 20472 | DIRNAME the name of the source directory which contains FILENAME |
| 20473 | or NULL if not known. |
| 20474 | This routine tries to keep line numbers from identical absolute and |
| 20475 | relative file names in a common subfile. |
| 20476 | |
| 20477 | Using the `list' example from the GDB testsuite, which resides in |
| 20478 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename |
| 20479 | of /srcdir/list0.c yields the following debugging information for list0.c: |
| 20480 | |
| 20481 | DW_AT_name: /srcdir/list0.c |
| 20482 | DW_AT_comp_dir: /compdir |
| 20483 | files.files[0].name: list0.h |
| 20484 | files.files[0].dir: /srcdir |
| 20485 | files.files[1].name: list0.c |
| 20486 | files.files[1].dir: /srcdir |
| 20487 | |
| 20488 | The line number information for list0.c has to end up in a single |
| 20489 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
| 20490 | start_subfile will ensure that this happens provided that we pass the |
| 20491 | concatenation of files.files[1].dir and files.files[1].name as the |
| 20492 | subfile's name. */ |
| 20493 | |
| 20494 | static void |
| 20495 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
| 20496 | const char *dirname) |
| 20497 | { |
| 20498 | gdb::unique_xmalloc_ptr<char> copy; |
| 20499 | |
| 20500 | /* In order not to lose the line information directory, |
| 20501 | we concatenate it to the filename when it makes sense. |
| 20502 | Note that the Dwarf3 standard says (speaking of filenames in line |
| 20503 | information): ``The directory index is ignored for file names |
| 20504 | that represent full path names''. Thus ignoring dirname in the |
| 20505 | `else' branch below isn't an issue. */ |
| 20506 | |
| 20507 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
| 20508 | { |
| 20509 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
| 20510 | filename = copy.get (); |
| 20511 | } |
| 20512 | |
| 20513 | cu->get_builder ()->start_subfile (filename); |
| 20514 | } |
| 20515 | |
| 20516 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
| 20517 | buildsym_compunit constructor. */ |
| 20518 | |
| 20519 | struct compunit_symtab * |
| 20520 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, |
| 20521 | CORE_ADDR low_pc) |
| 20522 | { |
| 20523 | gdb_assert (m_builder == nullptr); |
| 20524 | |
| 20525 | m_builder.reset (new struct buildsym_compunit |
| 20526 | (per_cu->dwarf2_per_objfile->objfile, |
| 20527 | name, comp_dir, language, low_pc)); |
| 20528 | |
| 20529 | list_in_scope = get_builder ()->get_file_symbols (); |
| 20530 | |
| 20531 | get_builder ()->record_debugformat ("DWARF 2"); |
| 20532 | get_builder ()->record_producer (producer); |
| 20533 | |
| 20534 | processing_has_namespace_info = false; |
| 20535 | |
| 20536 | return get_builder ()->get_compunit_symtab (); |
| 20537 | } |
| 20538 | |
| 20539 | static void |
| 20540 | var_decode_location (struct attribute *attr, struct symbol *sym, |
| 20541 | struct dwarf2_cu *cu) |
| 20542 | { |
| 20543 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20544 | struct comp_unit_head *cu_header = &cu->header; |
| 20545 | |
| 20546 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
| 20547 | code here to turn a symbol with DW_AT_external and a |
| 20548 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was |
| 20549 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux |
| 20550 | with some versions of binutils) where shared libraries could have |
| 20551 | relocations against symbols in their debug information - the |
| 20552 | minimal symbol would have the right address, but the debug info |
| 20553 | would not. It's no longer necessary, because we will explicitly |
| 20554 | apply relocations when we read in the debug information now. */ |
| 20555 | |
| 20556 | /* A DW_AT_location attribute with no contents indicates that a |
| 20557 | variable has been optimized away. */ |
| 20558 | if (attr->form_is_block () && DW_BLOCK (attr)->size == 0) |
| 20559 | { |
| 20560 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
| 20561 | return; |
| 20562 | } |
| 20563 | |
| 20564 | /* Handle one degenerate form of location expression specially, to |
| 20565 | preserve GDB's previous behavior when section offsets are |
| 20566 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
| 20567 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ |
| 20568 | |
| 20569 | if (attr->form_is_block () |
| 20570 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
| 20571 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) |
| 20572 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
| 20573 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) |
| 20574 | && (DW_BLOCK (attr)->size |
| 20575 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) |
| 20576 | { |
| 20577 | unsigned int dummy; |
| 20578 | |
| 20579 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
| 20580 | SET_SYMBOL_VALUE_ADDRESS |
| 20581 | (sym, cu->header.read_address (objfile->obfd, |
| 20582 | DW_BLOCK (attr)->data + 1, |
| 20583 | &dummy)); |
| 20584 | else |
| 20585 | SET_SYMBOL_VALUE_ADDRESS |
| 20586 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, |
| 20587 | &dummy)); |
| 20588 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| 20589 | fixup_symbol_section (sym, objfile); |
| 20590 | SET_SYMBOL_VALUE_ADDRESS |
| 20591 | (sym, |
| 20592 | SYMBOL_VALUE_ADDRESS (sym) |
| 20593 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); |
| 20594 | return; |
| 20595 | } |
| 20596 | |
| 20597 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static |
| 20598 | expression evaluator, and use LOC_COMPUTED only when necessary |
| 20599 | (i.e. when the value of a register or memory location is |
| 20600 | referenced, or a thread-local block, etc.). Then again, it might |
| 20601 | not be worthwhile. I'm assuming that it isn't unless performance |
| 20602 | or memory numbers show me otherwise. */ |
| 20603 | |
| 20604 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
| 20605 | |
| 20606 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
| 20607 | cu->has_loclist = true; |
| 20608 | } |
| 20609 | |
| 20610 | /* Given a pointer to a DWARF information entry, figure out if we need |
| 20611 | to make a symbol table entry for it, and if so, create a new entry |
| 20612 | and return a pointer to it. |
| 20613 | If TYPE is NULL, determine symbol type from the die, otherwise |
| 20614 | used the passed type. |
| 20615 | If SPACE is not NULL, use it to hold the new symbol. If it is |
| 20616 | NULL, allocate a new symbol on the objfile's obstack. */ |
| 20617 | |
| 20618 | static struct symbol * |
| 20619 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
| 20620 | struct symbol *space) |
| 20621 | { |
| 20622 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 20623 | = cu->per_cu->dwarf2_per_objfile; |
| 20624 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 20625 | struct gdbarch *gdbarch = objfile->arch (); |
| 20626 | struct symbol *sym = NULL; |
| 20627 | const char *name; |
| 20628 | struct attribute *attr = NULL; |
| 20629 | struct attribute *attr2 = NULL; |
| 20630 | CORE_ADDR baseaddr; |
| 20631 | struct pending **list_to_add = NULL; |
| 20632 | |
| 20633 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
| 20634 | |
| 20635 | baseaddr = objfile->text_section_offset (); |
| 20636 | |
| 20637 | name = dwarf2_name (die, cu); |
| 20638 | if (name) |
| 20639 | { |
| 20640 | int suppress_add = 0; |
| 20641 | |
| 20642 | if (space) |
| 20643 | sym = space; |
| 20644 | else |
| 20645 | sym = new (&objfile->objfile_obstack) symbol; |
| 20646 | OBJSTAT (objfile, n_syms++); |
| 20647 | |
| 20648 | /* Cache this symbol's name and the name's demangled form (if any). */ |
| 20649 | sym->set_language (cu->language, &objfile->objfile_obstack); |
| 20650 | /* Fortran does not have mangling standard and the mangling does differ |
| 20651 | between gfortran, iFort etc. */ |
| 20652 | const char *physname |
| 20653 | = (cu->language == language_fortran |
| 20654 | ? dwarf2_full_name (name, die, cu) |
| 20655 | : dwarf2_physname (name, die, cu)); |
| 20656 | const char *linkagename = dw2_linkage_name (die, cu); |
| 20657 | |
| 20658 | if (linkagename == nullptr || cu->language == language_ada) |
| 20659 | sym->set_linkage_name (physname); |
| 20660 | else |
| 20661 | { |
| 20662 | sym->set_demangled_name (physname, &objfile->objfile_obstack); |
| 20663 | sym->set_linkage_name (linkagename); |
| 20664 | } |
| 20665 | |
| 20666 | /* Default assumptions. |
| 20667 | Use the passed type or decode it from the die. */ |
| 20668 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 20669 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
| 20670 | if (type != NULL) |
| 20671 | SYMBOL_TYPE (sym) = type; |
| 20672 | else |
| 20673 | SYMBOL_TYPE (sym) = die_type (die, cu); |
| 20674 | attr = dwarf2_attr (die, |
| 20675 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, |
| 20676 | cu); |
| 20677 | if (attr != nullptr) |
| 20678 | { |
| 20679 | SYMBOL_LINE (sym) = DW_UNSND (attr); |
| 20680 | } |
| 20681 | |
| 20682 | attr = dwarf2_attr (die, |
| 20683 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, |
| 20684 | cu); |
| 20685 | if (attr != nullptr) |
| 20686 | { |
| 20687 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
| 20688 | struct file_entry *fe; |
| 20689 | |
| 20690 | if (cu->line_header != NULL) |
| 20691 | fe = cu->line_header->file_name_at (file_index); |
| 20692 | else |
| 20693 | fe = NULL; |
| 20694 | |
| 20695 | if (fe == NULL) |
| 20696 | complaint (_("file index out of range")); |
| 20697 | else |
| 20698 | symbol_set_symtab (sym, fe->symtab); |
| 20699 | } |
| 20700 | |
| 20701 | switch (die->tag) |
| 20702 | { |
| 20703 | case DW_TAG_label: |
| 20704 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 20705 | if (attr != nullptr) |
| 20706 | { |
| 20707 | CORE_ADDR addr; |
| 20708 | |
| 20709 | addr = attr->value_as_address (); |
| 20710 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
| 20711 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
| 20712 | } |
| 20713 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
| 20714 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; |
| 20715 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
| 20716 | add_symbol_to_list (sym, cu->list_in_scope); |
| 20717 | break; |
| 20718 | case DW_TAG_subprogram: |
| 20719 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 20720 | finish_block. */ |
| 20721 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 20722 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 20723 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
| 20724 | || cu->language == language_ada |
| 20725 | || cu->language == language_fortran) |
| 20726 | { |
| 20727 | /* Subprograms marked external are stored as a global symbol. |
| 20728 | Ada and Fortran subprograms, whether marked external or |
| 20729 | not, are always stored as a global symbol, because we want |
| 20730 | to be able to access them globally. For instance, we want |
| 20731 | to be able to break on a nested subprogram without having |
| 20732 | to specify the context. */ |
| 20733 | list_to_add = cu->get_builder ()->get_global_symbols (); |
| 20734 | } |
| 20735 | else |
| 20736 | { |
| 20737 | list_to_add = cu->list_in_scope; |
| 20738 | } |
| 20739 | break; |
| 20740 | case DW_TAG_inlined_subroutine: |
| 20741 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 20742 | finish_block. */ |
| 20743 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 20744 | SYMBOL_INLINED (sym) = 1; |
| 20745 | list_to_add = cu->list_in_scope; |
| 20746 | break; |
| 20747 | case DW_TAG_template_value_param: |
| 20748 | suppress_add = 1; |
| 20749 | /* Fall through. */ |
| 20750 | case DW_TAG_constant: |
| 20751 | case DW_TAG_variable: |
| 20752 | case DW_TAG_member: |
| 20753 | /* Compilation with minimal debug info may result in |
| 20754 | variables with missing type entries. Change the |
| 20755 | misleading `void' type to something sensible. */ |
| 20756 | if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID) |
| 20757 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
| 20758 | |
| 20759 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 20760 | /* In the case of DW_TAG_member, we should only be called for |
| 20761 | static const members. */ |
| 20762 | if (die->tag == DW_TAG_member) |
| 20763 | { |
| 20764 | /* dwarf2_add_field uses die_is_declaration, |
| 20765 | so we do the same. */ |
| 20766 | gdb_assert (die_is_declaration (die, cu)); |
| 20767 | gdb_assert (attr); |
| 20768 | } |
| 20769 | if (attr != nullptr) |
| 20770 | { |
| 20771 | dwarf2_const_value (attr, sym, cu); |
| 20772 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 20773 | if (!suppress_add) |
| 20774 | { |
| 20775 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 20776 | list_to_add = cu->get_builder ()->get_global_symbols (); |
| 20777 | else |
| 20778 | list_to_add = cu->list_in_scope; |
| 20779 | } |
| 20780 | break; |
| 20781 | } |
| 20782 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 20783 | if (attr != nullptr) |
| 20784 | { |
| 20785 | var_decode_location (attr, sym, cu); |
| 20786 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 20787 | |
| 20788 | /* Fortran explicitly imports any global symbols to the local |
| 20789 | scope by DW_TAG_common_block. */ |
| 20790 | if (cu->language == language_fortran && die->parent |
| 20791 | && die->parent->tag == DW_TAG_common_block) |
| 20792 | attr2 = NULL; |
| 20793 | |
| 20794 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
| 20795 | && SYMBOL_VALUE_ADDRESS (sym) == 0 |
| 20796 | && !dwarf2_per_objfile->has_section_at_zero) |
| 20797 | { |
| 20798 | /* When a static variable is eliminated by the linker, |
| 20799 | the corresponding debug information is not stripped |
| 20800 | out, but the variable address is set to null; |
| 20801 | do not add such variables into symbol table. */ |
| 20802 | } |
| 20803 | else if (attr2 && (DW_UNSND (attr2) != 0)) |
| 20804 | { |
| 20805 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
| 20806 | && (objfile->flags & OBJF_MAINLINE) == 0 |
| 20807 | && dwarf2_per_objfile->can_copy) |
| 20808 | { |
| 20809 | /* A global static variable might be subject to |
| 20810 | copy relocation. We first check for a local |
| 20811 | minsym, though, because maybe the symbol was |
| 20812 | marked hidden, in which case this would not |
| 20813 | apply. */ |
| 20814 | bound_minimal_symbol found |
| 20815 | = (lookup_minimal_symbol_linkage |
| 20816 | (sym->linkage_name (), objfile)); |
| 20817 | if (found.minsym != nullptr) |
| 20818 | sym->maybe_copied = 1; |
| 20819 | } |
| 20820 | |
| 20821 | /* A variable with DW_AT_external is never static, |
| 20822 | but it may be block-scoped. */ |
| 20823 | list_to_add |
| 20824 | = ((cu->list_in_scope |
| 20825 | == cu->get_builder ()->get_file_symbols ()) |
| 20826 | ? cu->get_builder ()->get_global_symbols () |
| 20827 | : cu->list_in_scope); |
| 20828 | } |
| 20829 | else |
| 20830 | list_to_add = cu->list_in_scope; |
| 20831 | } |
| 20832 | else |
| 20833 | { |
| 20834 | /* We do not know the address of this symbol. |
| 20835 | If it is an external symbol and we have type information |
| 20836 | for it, enter the symbol as a LOC_UNRESOLVED symbol. |
| 20837 | The address of the variable will then be determined from |
| 20838 | the minimal symbol table whenever the variable is |
| 20839 | referenced. */ |
| 20840 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 20841 | |
| 20842 | /* Fortran explicitly imports any global symbols to the local |
| 20843 | scope by DW_TAG_common_block. */ |
| 20844 | if (cu->language == language_fortran && die->parent |
| 20845 | && die->parent->tag == DW_TAG_common_block) |
| 20846 | { |
| 20847 | /* SYMBOL_CLASS doesn't matter here because |
| 20848 | read_common_block is going to reset it. */ |
| 20849 | if (!suppress_add) |
| 20850 | list_to_add = cu->list_in_scope; |
| 20851 | } |
| 20852 | else if (attr2 && (DW_UNSND (attr2) != 0) |
| 20853 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
| 20854 | { |
| 20855 | /* A variable with DW_AT_external is never static, but it |
| 20856 | may be block-scoped. */ |
| 20857 | list_to_add |
| 20858 | = ((cu->list_in_scope |
| 20859 | == cu->get_builder ()->get_file_symbols ()) |
| 20860 | ? cu->get_builder ()->get_global_symbols () |
| 20861 | : cu->list_in_scope); |
| 20862 | |
| 20863 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
| 20864 | } |
| 20865 | else if (!die_is_declaration (die, cu)) |
| 20866 | { |
| 20867 | /* Use the default LOC_OPTIMIZED_OUT class. */ |
| 20868 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); |
| 20869 | if (!suppress_add) |
| 20870 | list_to_add = cu->list_in_scope; |
| 20871 | } |
| 20872 | } |
| 20873 | break; |
| 20874 | case DW_TAG_formal_parameter: |
| 20875 | { |
| 20876 | /* If we are inside a function, mark this as an argument. If |
| 20877 | not, we might be looking at an argument to an inlined function |
| 20878 | when we do not have enough information to show inlined frames; |
| 20879 | pretend it's a local variable in that case so that the user can |
| 20880 | still see it. */ |
| 20881 | struct context_stack *curr |
| 20882 | = cu->get_builder ()->get_current_context_stack (); |
| 20883 | if (curr != nullptr && curr->name != nullptr) |
| 20884 | SYMBOL_IS_ARGUMENT (sym) = 1; |
| 20885 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 20886 | if (attr != nullptr) |
| 20887 | { |
| 20888 | var_decode_location (attr, sym, cu); |
| 20889 | } |
| 20890 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 20891 | if (attr != nullptr) |
| 20892 | { |
| 20893 | dwarf2_const_value (attr, sym, cu); |
| 20894 | } |
| 20895 | |
| 20896 | list_to_add = cu->list_in_scope; |
| 20897 | } |
| 20898 | break; |
| 20899 | case DW_TAG_unspecified_parameters: |
| 20900 | /* From varargs functions; gdb doesn't seem to have any |
| 20901 | interest in this information, so just ignore it for now. |
| 20902 | (FIXME?) */ |
| 20903 | break; |
| 20904 | case DW_TAG_template_type_param: |
| 20905 | suppress_add = 1; |
| 20906 | /* Fall through. */ |
| 20907 | case DW_TAG_class_type: |
| 20908 | case DW_TAG_interface_type: |
| 20909 | case DW_TAG_structure_type: |
| 20910 | case DW_TAG_union_type: |
| 20911 | case DW_TAG_set_type: |
| 20912 | case DW_TAG_enumeration_type: |
| 20913 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 20914 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 20915 | |
| 20916 | { |
| 20917 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
| 20918 | really ever be static objects: otherwise, if you try |
| 20919 | to, say, break of a class's method and you're in a file |
| 20920 | which doesn't mention that class, it won't work unless |
| 20921 | the check for all static symbols in lookup_symbol_aux |
| 20922 | saves you. See the OtherFileClass tests in |
| 20923 | gdb.c++/namespace.exp. */ |
| 20924 | |
| 20925 | if (!suppress_add) |
| 20926 | { |
| 20927 | buildsym_compunit *builder = cu->get_builder (); |
| 20928 | list_to_add |
| 20929 | = (cu->list_in_scope == builder->get_file_symbols () |
| 20930 | && cu->language == language_cplus |
| 20931 | ? builder->get_global_symbols () |
| 20932 | : cu->list_in_scope); |
| 20933 | |
| 20934 | /* The semantics of C++ state that "struct foo { |
| 20935 | ... }" also defines a typedef for "foo". */ |
| 20936 | if (cu->language == language_cplus |
| 20937 | || cu->language == language_ada |
| 20938 | || cu->language == language_d |
| 20939 | || cu->language == language_rust) |
| 20940 | { |
| 20941 | /* The symbol's name is already allocated along |
| 20942 | with this objfile, so we don't need to |
| 20943 | duplicate it for the type. */ |
| 20944 | if (SYMBOL_TYPE (sym)->name () == 0) |
| 20945 | SYMBOL_TYPE (sym)->set_name (sym->search_name ()); |
| 20946 | } |
| 20947 | } |
| 20948 | } |
| 20949 | break; |
| 20950 | case DW_TAG_typedef: |
| 20951 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 20952 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 20953 | list_to_add = cu->list_in_scope; |
| 20954 | break; |
| 20955 | case DW_TAG_base_type: |
| 20956 | case DW_TAG_subrange_type: |
| 20957 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 20958 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 20959 | list_to_add = cu->list_in_scope; |
| 20960 | break; |
| 20961 | case DW_TAG_enumerator: |
| 20962 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 20963 | if (attr != nullptr) |
| 20964 | { |
| 20965 | dwarf2_const_value (attr, sym, cu); |
| 20966 | } |
| 20967 | { |
| 20968 | /* NOTE: carlton/2003-11-10: See comment above in the |
| 20969 | DW_TAG_class_type, etc. block. */ |
| 20970 | |
| 20971 | list_to_add |
| 20972 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
| 20973 | && cu->language == language_cplus |
| 20974 | ? cu->get_builder ()->get_global_symbols () |
| 20975 | : cu->list_in_scope); |
| 20976 | } |
| 20977 | break; |
| 20978 | case DW_TAG_imported_declaration: |
| 20979 | case DW_TAG_namespace: |
| 20980 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 20981 | list_to_add = cu->get_builder ()->get_global_symbols (); |
| 20982 | break; |
| 20983 | case DW_TAG_module: |
| 20984 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 20985 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; |
| 20986 | list_to_add = cu->get_builder ()->get_global_symbols (); |
| 20987 | break; |
| 20988 | case DW_TAG_common_block: |
| 20989 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
| 20990 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
| 20991 | add_symbol_to_list (sym, cu->list_in_scope); |
| 20992 | break; |
| 20993 | default: |
| 20994 | /* Not a tag we recognize. Hopefully we aren't processing |
| 20995 | trash data, but since we must specifically ignore things |
| 20996 | we don't recognize, there is nothing else we should do at |
| 20997 | this point. */ |
| 20998 | complaint (_("unsupported tag: '%s'"), |
| 20999 | dwarf_tag_name (die->tag)); |
| 21000 | break; |
| 21001 | } |
| 21002 | |
| 21003 | if (suppress_add) |
| 21004 | { |
| 21005 | sym->hash_next = objfile->template_symbols; |
| 21006 | objfile->template_symbols = sym; |
| 21007 | list_to_add = NULL; |
| 21008 | } |
| 21009 | |
| 21010 | if (list_to_add != NULL) |
| 21011 | add_symbol_to_list (sym, list_to_add); |
| 21012 | |
| 21013 | /* For the benefit of old versions of GCC, check for anonymous |
| 21014 | namespaces based on the demangled name. */ |
| 21015 | if (!cu->processing_has_namespace_info |
| 21016 | && cu->language == language_cplus) |
| 21017 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
| 21018 | } |
| 21019 | return (sym); |
| 21020 | } |
| 21021 | |
| 21022 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
| 21023 | zero-extend it as appropriate for the symbol's type. The DWARF |
| 21024 | standard (v4) is not entirely clear about the meaning of using |
| 21025 | DW_FORM_dataN for a constant with a signed type, where the type is |
| 21026 | wider than the data. The conclusion of a discussion on the DWARF |
| 21027 | list was that this is unspecified. We choose to always zero-extend |
| 21028 | because that is the interpretation long in use by GCC. */ |
| 21029 | |
| 21030 | static gdb_byte * |
| 21031 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
| 21032 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
| 21033 | { |
| 21034 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21035 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
| 21036 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
| 21037 | LONGEST l = DW_UNSND (attr); |
| 21038 | |
| 21039 | if (bits < sizeof (*value) * 8) |
| 21040 | { |
| 21041 | l &= ((LONGEST) 1 << bits) - 1; |
| 21042 | *value = l; |
| 21043 | } |
| 21044 | else if (bits == sizeof (*value) * 8) |
| 21045 | *value = l; |
| 21046 | else |
| 21047 | { |
| 21048 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
| 21049 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
| 21050 | return bytes; |
| 21051 | } |
| 21052 | |
| 21053 | return NULL; |
| 21054 | } |
| 21055 | |
| 21056 | /* Read a constant value from an attribute. Either set *VALUE, or if |
| 21057 | the value does not fit in *VALUE, set *BYTES - either already |
| 21058 | allocated on the objfile obstack, or newly allocated on OBSTACK, |
| 21059 | or, set *BATON, if we translated the constant to a location |
| 21060 | expression. */ |
| 21061 | |
| 21062 | static void |
| 21063 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
| 21064 | const char *name, struct obstack *obstack, |
| 21065 | struct dwarf2_cu *cu, |
| 21066 | LONGEST *value, const gdb_byte **bytes, |
| 21067 | struct dwarf2_locexpr_baton **baton) |
| 21068 | { |
| 21069 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21070 | struct comp_unit_head *cu_header = &cu->header; |
| 21071 | struct dwarf_block *blk; |
| 21072 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
| 21073 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
| 21074 | |
| 21075 | *value = 0; |
| 21076 | *bytes = NULL; |
| 21077 | *baton = NULL; |
| 21078 | |
| 21079 | switch (attr->form) |
| 21080 | { |
| 21081 | case DW_FORM_addr: |
| 21082 | case DW_FORM_addrx: |
| 21083 | case DW_FORM_GNU_addr_index: |
| 21084 | { |
| 21085 | gdb_byte *data; |
| 21086 | |
| 21087 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
| 21088 | dwarf2_const_value_length_mismatch_complaint (name, |
| 21089 | cu_header->addr_size, |
| 21090 | TYPE_LENGTH (type)); |
| 21091 | /* Symbols of this form are reasonably rare, so we just |
| 21092 | piggyback on the existing location code rather than writing |
| 21093 | a new implementation of symbol_computed_ops. */ |
| 21094 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
| 21095 | (*baton)->per_cu = cu->per_cu; |
| 21096 | gdb_assert ((*baton)->per_cu); |
| 21097 | |
| 21098 | (*baton)->size = 2 + cu_header->addr_size; |
| 21099 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
| 21100 | (*baton)->data = data; |
| 21101 | |
| 21102 | data[0] = DW_OP_addr; |
| 21103 | store_unsigned_integer (&data[1], cu_header->addr_size, |
| 21104 | byte_order, DW_ADDR (attr)); |
| 21105 | data[cu_header->addr_size + 1] = DW_OP_stack_value; |
| 21106 | } |
| 21107 | break; |
| 21108 | case DW_FORM_string: |
| 21109 | case DW_FORM_strp: |
| 21110 | case DW_FORM_strx: |
| 21111 | case DW_FORM_GNU_str_index: |
| 21112 | case DW_FORM_GNU_strp_alt: |
| 21113 | /* DW_STRING is already allocated on the objfile obstack, point |
| 21114 | directly to it. */ |
| 21115 | *bytes = (const gdb_byte *) DW_STRING (attr); |
| 21116 | break; |
| 21117 | case DW_FORM_block1: |
| 21118 | case DW_FORM_block2: |
| 21119 | case DW_FORM_block4: |
| 21120 | case DW_FORM_block: |
| 21121 | case DW_FORM_exprloc: |
| 21122 | case DW_FORM_data16: |
| 21123 | blk = DW_BLOCK (attr); |
| 21124 | if (TYPE_LENGTH (type) != blk->size) |
| 21125 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, |
| 21126 | TYPE_LENGTH (type)); |
| 21127 | *bytes = blk->data; |
| 21128 | break; |
| 21129 | |
| 21130 | /* The DW_AT_const_value attributes are supposed to carry the |
| 21131 | symbol's value "represented as it would be on the target |
| 21132 | architecture." By the time we get here, it's already been |
| 21133 | converted to host endianness, so we just need to sign- or |
| 21134 | zero-extend it as appropriate. */ |
| 21135 | case DW_FORM_data1: |
| 21136 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
| 21137 | break; |
| 21138 | case DW_FORM_data2: |
| 21139 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
| 21140 | break; |
| 21141 | case DW_FORM_data4: |
| 21142 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
| 21143 | break; |
| 21144 | case DW_FORM_data8: |
| 21145 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
| 21146 | break; |
| 21147 | |
| 21148 | case DW_FORM_sdata: |
| 21149 | case DW_FORM_implicit_const: |
| 21150 | *value = DW_SND (attr); |
| 21151 | break; |
| 21152 | |
| 21153 | case DW_FORM_udata: |
| 21154 | *value = DW_UNSND (attr); |
| 21155 | break; |
| 21156 | |
| 21157 | default: |
| 21158 | complaint (_("unsupported const value attribute form: '%s'"), |
| 21159 | dwarf_form_name (attr->form)); |
| 21160 | *value = 0; |
| 21161 | break; |
| 21162 | } |
| 21163 | } |
| 21164 | |
| 21165 | |
| 21166 | /* Copy constant value from an attribute to a symbol. */ |
| 21167 | |
| 21168 | static void |
| 21169 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
| 21170 | struct dwarf2_cu *cu) |
| 21171 | { |
| 21172 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21173 | LONGEST value; |
| 21174 | const gdb_byte *bytes; |
| 21175 | struct dwarf2_locexpr_baton *baton; |
| 21176 | |
| 21177 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
| 21178 | sym->print_name (), |
| 21179 | &objfile->objfile_obstack, cu, |
| 21180 | &value, &bytes, &baton); |
| 21181 | |
| 21182 | if (baton != NULL) |
| 21183 | { |
| 21184 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 21185 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
| 21186 | } |
| 21187 | else if (bytes != NULL) |
| 21188 | { |
| 21189 | SYMBOL_VALUE_BYTES (sym) = bytes; |
| 21190 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
| 21191 | } |
| 21192 | else |
| 21193 | { |
| 21194 | SYMBOL_VALUE (sym) = value; |
| 21195 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
| 21196 | } |
| 21197 | } |
| 21198 | |
| 21199 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
| 21200 | |
| 21201 | static struct type * |
| 21202 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21203 | { |
| 21204 | struct attribute *type_attr; |
| 21205 | |
| 21206 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
| 21207 | if (!type_attr) |
| 21208 | { |
| 21209 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21210 | /* A missing DW_AT_type represents a void type. */ |
| 21211 | return objfile_type (objfile)->builtin_void; |
| 21212 | } |
| 21213 | |
| 21214 | return lookup_die_type (die, type_attr, cu); |
| 21215 | } |
| 21216 | |
| 21217 | /* True iff CU's producer generates GNAT Ada auxiliary information |
| 21218 | that allows to find parallel types through that information instead |
| 21219 | of having to do expensive parallel lookups by type name. */ |
| 21220 | |
| 21221 | static int |
| 21222 | need_gnat_info (struct dwarf2_cu *cu) |
| 21223 | { |
| 21224 | /* Assume that the Ada compiler was GNAT, which always produces |
| 21225 | the auxiliary information. */ |
| 21226 | return (cu->language == language_ada); |
| 21227 | } |
| 21228 | |
| 21229 | /* Return the auxiliary type of the die in question using its |
| 21230 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the |
| 21231 | attribute is not present. */ |
| 21232 | |
| 21233 | static struct type * |
| 21234 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21235 | { |
| 21236 | struct attribute *type_attr; |
| 21237 | |
| 21238 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); |
| 21239 | if (!type_attr) |
| 21240 | return NULL; |
| 21241 | |
| 21242 | return lookup_die_type (die, type_attr, cu); |
| 21243 | } |
| 21244 | |
| 21245 | /* If DIE has a descriptive_type attribute, then set the TYPE's |
| 21246 | descriptive type accordingly. */ |
| 21247 | |
| 21248 | static void |
| 21249 | set_descriptive_type (struct type *type, struct die_info *die, |
| 21250 | struct dwarf2_cu *cu) |
| 21251 | { |
| 21252 | struct type *descriptive_type = die_descriptive_type (die, cu); |
| 21253 | |
| 21254 | if (descriptive_type) |
| 21255 | { |
| 21256 | ALLOCATE_GNAT_AUX_TYPE (type); |
| 21257 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; |
| 21258 | } |
| 21259 | } |
| 21260 | |
| 21261 | /* Return the containing type of the die in question using its |
| 21262 | DW_AT_containing_type attribute. */ |
| 21263 | |
| 21264 | static struct type * |
| 21265 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21266 | { |
| 21267 | struct attribute *type_attr; |
| 21268 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21269 | |
| 21270 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
| 21271 | if (!type_attr) |
| 21272 | error (_("Dwarf Error: Problem turning containing type into gdb type " |
| 21273 | "[in module %s]"), objfile_name (objfile)); |
| 21274 | |
| 21275 | return lookup_die_type (die, type_attr, cu); |
| 21276 | } |
| 21277 | |
| 21278 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
| 21279 | |
| 21280 | static struct type * |
| 21281 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) |
| 21282 | { |
| 21283 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21284 | = cu->per_cu->dwarf2_per_objfile; |
| 21285 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 21286 | char *saved; |
| 21287 | |
| 21288 | std::string message |
| 21289 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), |
| 21290 | objfile_name (objfile), |
| 21291 | sect_offset_str (cu->header.sect_off), |
| 21292 | sect_offset_str (die->sect_off)); |
| 21293 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
| 21294 | |
| 21295 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
| 21296 | } |
| 21297 | |
| 21298 | /* Look up the type of DIE in CU using its type attribute ATTR. |
| 21299 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
| 21300 | DW_AT_containing_type. |
| 21301 | If there is no type substitute an error marker. */ |
| 21302 | |
| 21303 | static struct type * |
| 21304 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
| 21305 | struct dwarf2_cu *cu) |
| 21306 | { |
| 21307 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21308 | = cu->per_cu->dwarf2_per_objfile; |
| 21309 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 21310 | struct type *this_type; |
| 21311 | |
| 21312 | gdb_assert (attr->name == DW_AT_type |
| 21313 | || attr->name == DW_AT_GNAT_descriptive_type |
| 21314 | || attr->name == DW_AT_containing_type); |
| 21315 | |
| 21316 | /* First see if we have it cached. */ |
| 21317 | |
| 21318 | if (attr->form == DW_FORM_GNU_ref_alt) |
| 21319 | { |
| 21320 | struct dwarf2_per_cu_data *per_cu; |
| 21321 | sect_offset sect_off = attr->get_ref_die_offset (); |
| 21322 | |
| 21323 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
| 21324 | dwarf2_per_objfile); |
| 21325 | this_type = get_die_type_at_offset (sect_off, per_cu); |
| 21326 | } |
| 21327 | else if (attr->form_is_ref ()) |
| 21328 | { |
| 21329 | sect_offset sect_off = attr->get_ref_die_offset (); |
| 21330 | |
| 21331 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
| 21332 | } |
| 21333 | else if (attr->form == DW_FORM_ref_sig8) |
| 21334 | { |
| 21335 | ULONGEST signature = DW_SIGNATURE (attr); |
| 21336 | |
| 21337 | return get_signatured_type (die, signature, cu); |
| 21338 | } |
| 21339 | else |
| 21340 | { |
| 21341 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
| 21342 | " at %s [in module %s]"), |
| 21343 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), |
| 21344 | objfile_name (objfile)); |
| 21345 | return build_error_marker_type (cu, die); |
| 21346 | } |
| 21347 | |
| 21348 | /* If not cached we need to read it in. */ |
| 21349 | |
| 21350 | if (this_type == NULL) |
| 21351 | { |
| 21352 | struct die_info *type_die = NULL; |
| 21353 | struct dwarf2_cu *type_cu = cu; |
| 21354 | |
| 21355 | if (attr->form_is_ref ()) |
| 21356 | type_die = follow_die_ref (die, attr, &type_cu); |
| 21357 | if (type_die == NULL) |
| 21358 | return build_error_marker_type (cu, die); |
| 21359 | /* If we find the type now, it's probably because the type came |
| 21360 | from an inter-CU reference and the type's CU got expanded before |
| 21361 | ours. */ |
| 21362 | this_type = read_type_die (type_die, type_cu); |
| 21363 | } |
| 21364 | |
| 21365 | /* If we still don't have a type use an error marker. */ |
| 21366 | |
| 21367 | if (this_type == NULL) |
| 21368 | return build_error_marker_type (cu, die); |
| 21369 | |
| 21370 | return this_type; |
| 21371 | } |
| 21372 | |
| 21373 | /* Return the type in DIE, CU. |
| 21374 | Returns NULL for invalid types. |
| 21375 | |
| 21376 | This first does a lookup in die_type_hash, |
| 21377 | and only reads the die in if necessary. |
| 21378 | |
| 21379 | NOTE: This can be called when reading in partial or full symbols. */ |
| 21380 | |
| 21381 | static struct type * |
| 21382 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
| 21383 | { |
| 21384 | struct type *this_type; |
| 21385 | |
| 21386 | this_type = get_die_type (die, cu); |
| 21387 | if (this_type) |
| 21388 | return this_type; |
| 21389 | |
| 21390 | return read_type_die_1 (die, cu); |
| 21391 | } |
| 21392 | |
| 21393 | /* Read the type in DIE, CU. |
| 21394 | Returns NULL for invalid types. */ |
| 21395 | |
| 21396 | static struct type * |
| 21397 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) |
| 21398 | { |
| 21399 | struct type *this_type = NULL; |
| 21400 | |
| 21401 | switch (die->tag) |
| 21402 | { |
| 21403 | case DW_TAG_class_type: |
| 21404 | case DW_TAG_interface_type: |
| 21405 | case DW_TAG_structure_type: |
| 21406 | case DW_TAG_union_type: |
| 21407 | this_type = read_structure_type (die, cu); |
| 21408 | break; |
| 21409 | case DW_TAG_enumeration_type: |
| 21410 | this_type = read_enumeration_type (die, cu); |
| 21411 | break; |
| 21412 | case DW_TAG_subprogram: |
| 21413 | case DW_TAG_subroutine_type: |
| 21414 | case DW_TAG_inlined_subroutine: |
| 21415 | this_type = read_subroutine_type (die, cu); |
| 21416 | break; |
| 21417 | case DW_TAG_array_type: |
| 21418 | this_type = read_array_type (die, cu); |
| 21419 | break; |
| 21420 | case DW_TAG_set_type: |
| 21421 | this_type = read_set_type (die, cu); |
| 21422 | break; |
| 21423 | case DW_TAG_pointer_type: |
| 21424 | this_type = read_tag_pointer_type (die, cu); |
| 21425 | break; |
| 21426 | case DW_TAG_ptr_to_member_type: |
| 21427 | this_type = read_tag_ptr_to_member_type (die, cu); |
| 21428 | break; |
| 21429 | case DW_TAG_reference_type: |
| 21430 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
| 21431 | break; |
| 21432 | case DW_TAG_rvalue_reference_type: |
| 21433 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); |
| 21434 | break; |
| 21435 | case DW_TAG_const_type: |
| 21436 | this_type = read_tag_const_type (die, cu); |
| 21437 | break; |
| 21438 | case DW_TAG_volatile_type: |
| 21439 | this_type = read_tag_volatile_type (die, cu); |
| 21440 | break; |
| 21441 | case DW_TAG_restrict_type: |
| 21442 | this_type = read_tag_restrict_type (die, cu); |
| 21443 | break; |
| 21444 | case DW_TAG_string_type: |
| 21445 | this_type = read_tag_string_type (die, cu); |
| 21446 | break; |
| 21447 | case DW_TAG_typedef: |
| 21448 | this_type = read_typedef (die, cu); |
| 21449 | break; |
| 21450 | case DW_TAG_subrange_type: |
| 21451 | this_type = read_subrange_type (die, cu); |
| 21452 | break; |
| 21453 | case DW_TAG_base_type: |
| 21454 | this_type = read_base_type (die, cu); |
| 21455 | break; |
| 21456 | case DW_TAG_unspecified_type: |
| 21457 | this_type = read_unspecified_type (die, cu); |
| 21458 | break; |
| 21459 | case DW_TAG_namespace: |
| 21460 | this_type = read_namespace_type (die, cu); |
| 21461 | break; |
| 21462 | case DW_TAG_module: |
| 21463 | this_type = read_module_type (die, cu); |
| 21464 | break; |
| 21465 | case DW_TAG_atomic_type: |
| 21466 | this_type = read_tag_atomic_type (die, cu); |
| 21467 | break; |
| 21468 | default: |
| 21469 | complaint (_("unexpected tag in read_type_die: '%s'"), |
| 21470 | dwarf_tag_name (die->tag)); |
| 21471 | break; |
| 21472 | } |
| 21473 | |
| 21474 | return this_type; |
| 21475 | } |
| 21476 | |
| 21477 | /* See if we can figure out if the class lives in a namespace. We do |
| 21478 | this by looking for a member function; its demangled name will |
| 21479 | contain namespace info, if there is any. |
| 21480 | Return the computed name or NULL. |
| 21481 | Space for the result is allocated on the objfile's obstack. |
| 21482 | This is the full-die version of guess_partial_die_structure_name. |
| 21483 | In this case we know DIE has no useful parent. */ |
| 21484 | |
| 21485 | static const char * |
| 21486 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
| 21487 | { |
| 21488 | struct die_info *spec_die; |
| 21489 | struct dwarf2_cu *spec_cu; |
| 21490 | struct die_info *child; |
| 21491 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21492 | |
| 21493 | spec_cu = cu; |
| 21494 | spec_die = die_specification (die, &spec_cu); |
| 21495 | if (spec_die != NULL) |
| 21496 | { |
| 21497 | die = spec_die; |
| 21498 | cu = spec_cu; |
| 21499 | } |
| 21500 | |
| 21501 | for (child = die->child; |
| 21502 | child != NULL; |
| 21503 | child = child->sibling) |
| 21504 | { |
| 21505 | if (child->tag == DW_TAG_subprogram) |
| 21506 | { |
| 21507 | const char *linkage_name = dw2_linkage_name (child, cu); |
| 21508 | |
| 21509 | if (linkage_name != NULL) |
| 21510 | { |
| 21511 | gdb::unique_xmalloc_ptr<char> actual_name |
| 21512 | (language_class_name_from_physname (cu->language_defn, |
| 21513 | linkage_name)); |
| 21514 | const char *name = NULL; |
| 21515 | |
| 21516 | if (actual_name != NULL) |
| 21517 | { |
| 21518 | const char *die_name = dwarf2_name (die, cu); |
| 21519 | |
| 21520 | if (die_name != NULL |
| 21521 | && strcmp (die_name, actual_name.get ()) != 0) |
| 21522 | { |
| 21523 | /* Strip off the class name from the full name. |
| 21524 | We want the prefix. */ |
| 21525 | int die_name_len = strlen (die_name); |
| 21526 | int actual_name_len = strlen (actual_name.get ()); |
| 21527 | const char *ptr = actual_name.get (); |
| 21528 | |
| 21529 | /* Test for '::' as a sanity check. */ |
| 21530 | if (actual_name_len > die_name_len + 2 |
| 21531 | && ptr[actual_name_len - die_name_len - 1] == ':') |
| 21532 | name = obstack_strndup ( |
| 21533 | &objfile->per_bfd->storage_obstack, |
| 21534 | ptr, actual_name_len - die_name_len - 2); |
| 21535 | } |
| 21536 | } |
| 21537 | return name; |
| 21538 | } |
| 21539 | } |
| 21540 | } |
| 21541 | |
| 21542 | return NULL; |
| 21543 | } |
| 21544 | |
| 21545 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
| 21546 | prefix part in such case. See |
| 21547 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 21548 | |
| 21549 | static const char * |
| 21550 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
| 21551 | { |
| 21552 | struct attribute *attr; |
| 21553 | const char *base; |
| 21554 | |
| 21555 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type |
| 21556 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) |
| 21557 | return NULL; |
| 21558 | |
| 21559 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
| 21560 | return NULL; |
| 21561 | |
| 21562 | attr = dw2_linkage_name_attr (die, cu); |
| 21563 | if (attr == NULL || DW_STRING (attr) == NULL) |
| 21564 | return NULL; |
| 21565 | |
| 21566 | /* dwarf2_name had to be already called. */ |
| 21567 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); |
| 21568 | |
| 21569 | /* Strip the base name, keep any leading namespaces/classes. */ |
| 21570 | base = strrchr (DW_STRING (attr), ':'); |
| 21571 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') |
| 21572 | return ""; |
| 21573 | |
| 21574 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21575 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
| 21576 | DW_STRING (attr), |
| 21577 | &base[-1] - DW_STRING (attr)); |
| 21578 | } |
| 21579 | |
| 21580 | /* Return the name of the namespace/class that DIE is defined within, |
| 21581 | or "" if we can't tell. The caller should not xfree the result. |
| 21582 | |
| 21583 | For example, if we're within the method foo() in the following |
| 21584 | code: |
| 21585 | |
| 21586 | namespace N { |
| 21587 | class C { |
| 21588 | void foo () { |
| 21589 | } |
| 21590 | }; |
| 21591 | } |
| 21592 | |
| 21593 | then determine_prefix on foo's die will return "N::C". */ |
| 21594 | |
| 21595 | static const char * |
| 21596 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
| 21597 | { |
| 21598 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21599 | = cu->per_cu->dwarf2_per_objfile; |
| 21600 | struct die_info *parent, *spec_die; |
| 21601 | struct dwarf2_cu *spec_cu; |
| 21602 | struct type *parent_type; |
| 21603 | const char *retval; |
| 21604 | |
| 21605 | if (cu->language != language_cplus |
| 21606 | && cu->language != language_fortran && cu->language != language_d |
| 21607 | && cu->language != language_rust) |
| 21608 | return ""; |
| 21609 | |
| 21610 | retval = anonymous_struct_prefix (die, cu); |
| 21611 | if (retval) |
| 21612 | return retval; |
| 21613 | |
| 21614 | /* We have to be careful in the presence of DW_AT_specification. |
| 21615 | For example, with GCC 3.4, given the code |
| 21616 | |
| 21617 | namespace N { |
| 21618 | void foo() { |
| 21619 | // Definition of N::foo. |
| 21620 | } |
| 21621 | } |
| 21622 | |
| 21623 | then we'll have a tree of DIEs like this: |
| 21624 | |
| 21625 | 1: DW_TAG_compile_unit |
| 21626 | 2: DW_TAG_namespace // N |
| 21627 | 3: DW_TAG_subprogram // declaration of N::foo |
| 21628 | 4: DW_TAG_subprogram // definition of N::foo |
| 21629 | DW_AT_specification // refers to die #3 |
| 21630 | |
| 21631 | Thus, when processing die #4, we have to pretend that we're in |
| 21632 | the context of its DW_AT_specification, namely the contex of die |
| 21633 | #3. */ |
| 21634 | spec_cu = cu; |
| 21635 | spec_die = die_specification (die, &spec_cu); |
| 21636 | if (spec_die == NULL) |
| 21637 | parent = die->parent; |
| 21638 | else |
| 21639 | { |
| 21640 | parent = spec_die->parent; |
| 21641 | cu = spec_cu; |
| 21642 | } |
| 21643 | |
| 21644 | if (parent == NULL) |
| 21645 | return ""; |
| 21646 | else if (parent->building_fullname) |
| 21647 | { |
| 21648 | const char *name; |
| 21649 | const char *parent_name; |
| 21650 | |
| 21651 | /* It has been seen on RealView 2.2 built binaries, |
| 21652 | DW_TAG_template_type_param types actually _defined_ as |
| 21653 | children of the parent class: |
| 21654 | |
| 21655 | enum E {}; |
| 21656 | template class <class Enum> Class{}; |
| 21657 | Class<enum E> class_e; |
| 21658 | |
| 21659 | 1: DW_TAG_class_type (Class) |
| 21660 | 2: DW_TAG_enumeration_type (E) |
| 21661 | 3: DW_TAG_enumerator (enum1:0) |
| 21662 | 3: DW_TAG_enumerator (enum2:1) |
| 21663 | ... |
| 21664 | 2: DW_TAG_template_type_param |
| 21665 | DW_AT_type DW_FORM_ref_udata (E) |
| 21666 | |
| 21667 | Besides being broken debug info, it can put GDB into an |
| 21668 | infinite loop. Consider: |
| 21669 | |
| 21670 | When we're building the full name for Class<E>, we'll start |
| 21671 | at Class, and go look over its template type parameters, |
| 21672 | finding E. We'll then try to build the full name of E, and |
| 21673 | reach here. We're now trying to build the full name of E, |
| 21674 | and look over the parent DIE for containing scope. In the |
| 21675 | broken case, if we followed the parent DIE of E, we'd again |
| 21676 | find Class, and once again go look at its template type |
| 21677 | arguments, etc., etc. Simply don't consider such parent die |
| 21678 | as source-level parent of this die (it can't be, the language |
| 21679 | doesn't allow it), and break the loop here. */ |
| 21680 | name = dwarf2_name (die, cu); |
| 21681 | parent_name = dwarf2_name (parent, cu); |
| 21682 | complaint (_("template param type '%s' defined within parent '%s'"), |
| 21683 | name ? name : "<unknown>", |
| 21684 | parent_name ? parent_name : "<unknown>"); |
| 21685 | return ""; |
| 21686 | } |
| 21687 | else |
| 21688 | switch (parent->tag) |
| 21689 | { |
| 21690 | case DW_TAG_namespace: |
| 21691 | parent_type = read_type_die (parent, cu); |
| 21692 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
| 21693 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. |
| 21694 | Work around this problem here. */ |
| 21695 | if (cu->language == language_cplus |
| 21696 | && strcmp (parent_type->name (), "::") == 0) |
| 21697 | return ""; |
| 21698 | /* We give a name to even anonymous namespaces. */ |
| 21699 | return parent_type->name (); |
| 21700 | case DW_TAG_class_type: |
| 21701 | case DW_TAG_interface_type: |
| 21702 | case DW_TAG_structure_type: |
| 21703 | case DW_TAG_union_type: |
| 21704 | case DW_TAG_module: |
| 21705 | parent_type = read_type_die (parent, cu); |
| 21706 | if (parent_type->name () != NULL) |
| 21707 | return parent_type->name (); |
| 21708 | else |
| 21709 | /* An anonymous structure is only allowed non-static data |
| 21710 | members; no typedefs, no member functions, et cetera. |
| 21711 | So it does not need a prefix. */ |
| 21712 | return ""; |
| 21713 | case DW_TAG_compile_unit: |
| 21714 | case DW_TAG_partial_unit: |
| 21715 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
| 21716 | if (cu->language == language_cplus |
| 21717 | && !dwarf2_per_objfile->types.empty () |
| 21718 | && die->child != NULL |
| 21719 | && (die->tag == DW_TAG_class_type |
| 21720 | || die->tag == DW_TAG_structure_type |
| 21721 | || die->tag == DW_TAG_union_type)) |
| 21722 | { |
| 21723 | const char *name = guess_full_die_structure_name (die, cu); |
| 21724 | if (name != NULL) |
| 21725 | return name; |
| 21726 | } |
| 21727 | return ""; |
| 21728 | case DW_TAG_subprogram: |
| 21729 | /* Nested subroutines in Fortran get a prefix with the name |
| 21730 | of the parent's subroutine. */ |
| 21731 | if (cu->language == language_fortran) |
| 21732 | { |
| 21733 | if ((die->tag == DW_TAG_subprogram) |
| 21734 | && (dwarf2_name (parent, cu) != NULL)) |
| 21735 | return dwarf2_name (parent, cu); |
| 21736 | } |
| 21737 | return determine_prefix (parent, cu); |
| 21738 | case DW_TAG_enumeration_type: |
| 21739 | parent_type = read_type_die (parent, cu); |
| 21740 | if (TYPE_DECLARED_CLASS (parent_type)) |
| 21741 | { |
| 21742 | if (parent_type->name () != NULL) |
| 21743 | return parent_type->name (); |
| 21744 | return ""; |
| 21745 | } |
| 21746 | /* Fall through. */ |
| 21747 | default: |
| 21748 | return determine_prefix (parent, cu); |
| 21749 | } |
| 21750 | } |
| 21751 | |
| 21752 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
| 21753 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then |
| 21754 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform |
| 21755 | an obconcat, otherwise allocate storage for the result. The CU argument is |
| 21756 | used to determine the language and hence, the appropriate separator. */ |
| 21757 | |
| 21758 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
| 21759 | |
| 21760 | static char * |
| 21761 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
| 21762 | int physname, struct dwarf2_cu *cu) |
| 21763 | { |
| 21764 | const char *lead = ""; |
| 21765 | const char *sep; |
| 21766 | |
| 21767 | if (suffix == NULL || suffix[0] == '\0' |
| 21768 | || prefix == NULL || prefix[0] == '\0') |
| 21769 | sep = ""; |
| 21770 | else if (cu->language == language_d) |
| 21771 | { |
| 21772 | /* For D, the 'main' function could be defined in any module, but it |
| 21773 | should never be prefixed. */ |
| 21774 | if (strcmp (suffix, "D main") == 0) |
| 21775 | { |
| 21776 | prefix = ""; |
| 21777 | sep = ""; |
| 21778 | } |
| 21779 | else |
| 21780 | sep = "."; |
| 21781 | } |
| 21782 | else if (cu->language == language_fortran && physname) |
| 21783 | { |
| 21784 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or |
| 21785 | DW_AT_MIPS_linkage_name is preferred and used instead. */ |
| 21786 | |
| 21787 | lead = "__"; |
| 21788 | sep = "_MOD_"; |
| 21789 | } |
| 21790 | else |
| 21791 | sep = "::"; |
| 21792 | |
| 21793 | if (prefix == NULL) |
| 21794 | prefix = ""; |
| 21795 | if (suffix == NULL) |
| 21796 | suffix = ""; |
| 21797 | |
| 21798 | if (obs == NULL) |
| 21799 | { |
| 21800 | char *retval |
| 21801 | = ((char *) |
| 21802 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); |
| 21803 | |
| 21804 | strcpy (retval, lead); |
| 21805 | strcat (retval, prefix); |
| 21806 | strcat (retval, sep); |
| 21807 | strcat (retval, suffix); |
| 21808 | return retval; |
| 21809 | } |
| 21810 | else |
| 21811 | { |
| 21812 | /* We have an obstack. */ |
| 21813 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
| 21814 | } |
| 21815 | } |
| 21816 | |
| 21817 | /* Get name of a die, return NULL if not found. */ |
| 21818 | |
| 21819 | static const char * |
| 21820 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, |
| 21821 | struct objfile *objfile) |
| 21822 | { |
| 21823 | if (name && cu->language == language_cplus) |
| 21824 | { |
| 21825 | gdb::unique_xmalloc_ptr<char> canon_name |
| 21826 | = cp_canonicalize_string (name); |
| 21827 | |
| 21828 | if (canon_name != nullptr) |
| 21829 | name = objfile->intern (canon_name.get ()); |
| 21830 | } |
| 21831 | |
| 21832 | return name; |
| 21833 | } |
| 21834 | |
| 21835 | /* Get name of a die, return NULL if not found. |
| 21836 | Anonymous namespaces are converted to their magic string. */ |
| 21837 | |
| 21838 | static const char * |
| 21839 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
| 21840 | { |
| 21841 | struct attribute *attr; |
| 21842 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21843 | |
| 21844 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 21845 | if ((!attr || !DW_STRING (attr)) |
| 21846 | && die->tag != DW_TAG_namespace |
| 21847 | && die->tag != DW_TAG_class_type |
| 21848 | && die->tag != DW_TAG_interface_type |
| 21849 | && die->tag != DW_TAG_structure_type |
| 21850 | && die->tag != DW_TAG_union_type) |
| 21851 | return NULL; |
| 21852 | |
| 21853 | switch (die->tag) |
| 21854 | { |
| 21855 | case DW_TAG_compile_unit: |
| 21856 | case DW_TAG_partial_unit: |
| 21857 | /* Compilation units have a DW_AT_name that is a filename, not |
| 21858 | a source language identifier. */ |
| 21859 | case DW_TAG_enumeration_type: |
| 21860 | case DW_TAG_enumerator: |
| 21861 | /* These tags always have simple identifiers already; no need |
| 21862 | to canonicalize them. */ |
| 21863 | return DW_STRING (attr); |
| 21864 | |
| 21865 | case DW_TAG_namespace: |
| 21866 | if (attr != NULL && DW_STRING (attr) != NULL) |
| 21867 | return DW_STRING (attr); |
| 21868 | return CP_ANONYMOUS_NAMESPACE_STR; |
| 21869 | |
| 21870 | case DW_TAG_class_type: |
| 21871 | case DW_TAG_interface_type: |
| 21872 | case DW_TAG_structure_type: |
| 21873 | case DW_TAG_union_type: |
| 21874 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed |
| 21875 | structures or unions. These were of the form "._%d" in GCC 4.1, |
| 21876 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 |
| 21877 | and GCC 4.4. We work around this problem by ignoring these. */ |
| 21878 | if (attr && DW_STRING (attr) |
| 21879 | && (startswith (DW_STRING (attr), "._") |
| 21880 | || startswith (DW_STRING (attr), "<anonymous"))) |
| 21881 | return NULL; |
| 21882 | |
| 21883 | /* GCC might emit a nameless typedef that has a linkage name. See |
| 21884 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 21885 | if (!attr || DW_STRING (attr) == NULL) |
| 21886 | { |
| 21887 | attr = dw2_linkage_name_attr (die, cu); |
| 21888 | if (attr == NULL || DW_STRING (attr) == NULL) |
| 21889 | return NULL; |
| 21890 | |
| 21891 | /* Avoid demangling DW_STRING (attr) the second time on a second |
| 21892 | call for the same DIE. */ |
| 21893 | if (!DW_STRING_IS_CANONICAL (attr)) |
| 21894 | { |
| 21895 | gdb::unique_xmalloc_ptr<char> demangled |
| 21896 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); |
| 21897 | if (demangled == nullptr) |
| 21898 | return nullptr; |
| 21899 | |
| 21900 | DW_STRING (attr) = objfile->intern (demangled.get ()); |
| 21901 | DW_STRING_IS_CANONICAL (attr) = 1; |
| 21902 | } |
| 21903 | |
| 21904 | /* Strip any leading namespaces/classes, keep only the base name. |
| 21905 | DW_AT_name for named DIEs does not contain the prefixes. */ |
| 21906 | const char *base = strrchr (DW_STRING (attr), ':'); |
| 21907 | if (base && base > DW_STRING (attr) && base[-1] == ':') |
| 21908 | return &base[1]; |
| 21909 | else |
| 21910 | return DW_STRING (attr); |
| 21911 | } |
| 21912 | break; |
| 21913 | |
| 21914 | default: |
| 21915 | break; |
| 21916 | } |
| 21917 | |
| 21918 | if (!DW_STRING_IS_CANONICAL (attr)) |
| 21919 | { |
| 21920 | DW_STRING (attr) = dwarf2_canonicalize_name (DW_STRING (attr), cu, |
| 21921 | objfile); |
| 21922 | DW_STRING_IS_CANONICAL (attr) = 1; |
| 21923 | } |
| 21924 | return DW_STRING (attr); |
| 21925 | } |
| 21926 | |
| 21927 | /* Return the die that this die in an extension of, or NULL if there |
| 21928 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
| 21929 | containing the return value on output. */ |
| 21930 | |
| 21931 | static struct die_info * |
| 21932 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
| 21933 | { |
| 21934 | struct attribute *attr; |
| 21935 | |
| 21936 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
| 21937 | if (attr == NULL) |
| 21938 | return NULL; |
| 21939 | |
| 21940 | return follow_die_ref (die, attr, ext_cu); |
| 21941 | } |
| 21942 | |
| 21943 | static void |
| 21944 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
| 21945 | { |
| 21946 | unsigned int i; |
| 21947 | |
| 21948 | print_spaces (indent, f); |
| 21949 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
| 21950 | dwarf_tag_name (die->tag), die->abbrev, |
| 21951 | sect_offset_str (die->sect_off)); |
| 21952 | |
| 21953 | if (die->parent != NULL) |
| 21954 | { |
| 21955 | print_spaces (indent, f); |
| 21956 | fprintf_unfiltered (f, " parent at offset: %s\n", |
| 21957 | sect_offset_str (die->parent->sect_off)); |
| 21958 | } |
| 21959 | |
| 21960 | print_spaces (indent, f); |
| 21961 | fprintf_unfiltered (f, " has children: %s\n", |
| 21962 | dwarf_bool_name (die->child != NULL)); |
| 21963 | |
| 21964 | print_spaces (indent, f); |
| 21965 | fprintf_unfiltered (f, " attributes:\n"); |
| 21966 | |
| 21967 | for (i = 0; i < die->num_attrs; ++i) |
| 21968 | { |
| 21969 | print_spaces (indent, f); |
| 21970 | fprintf_unfiltered (f, " %s (%s) ", |
| 21971 | dwarf_attr_name (die->attrs[i].name), |
| 21972 | dwarf_form_name (die->attrs[i].form)); |
| 21973 | |
| 21974 | switch (die->attrs[i].form) |
| 21975 | { |
| 21976 | case DW_FORM_addr: |
| 21977 | case DW_FORM_addrx: |
| 21978 | case DW_FORM_GNU_addr_index: |
| 21979 | fprintf_unfiltered (f, "address: "); |
| 21980 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
| 21981 | break; |
| 21982 | case DW_FORM_block2: |
| 21983 | case DW_FORM_block4: |
| 21984 | case DW_FORM_block: |
| 21985 | case DW_FORM_block1: |
| 21986 | fprintf_unfiltered (f, "block: size %s", |
| 21987 | pulongest (DW_BLOCK (&die->attrs[i])->size)); |
| 21988 | break; |
| 21989 | case DW_FORM_exprloc: |
| 21990 | fprintf_unfiltered (f, "expression: size %s", |
| 21991 | pulongest (DW_BLOCK (&die->attrs[i])->size)); |
| 21992 | break; |
| 21993 | case DW_FORM_data16: |
| 21994 | fprintf_unfiltered (f, "constant of 16 bytes"); |
| 21995 | break; |
| 21996 | case DW_FORM_ref_addr: |
| 21997 | fprintf_unfiltered (f, "ref address: "); |
| 21998 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); |
| 21999 | break; |
| 22000 | case DW_FORM_GNU_ref_alt: |
| 22001 | fprintf_unfiltered (f, "alt ref address: "); |
| 22002 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); |
| 22003 | break; |
| 22004 | case DW_FORM_ref1: |
| 22005 | case DW_FORM_ref2: |
| 22006 | case DW_FORM_ref4: |
| 22007 | case DW_FORM_ref8: |
| 22008 | case DW_FORM_ref_udata: |
| 22009 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
| 22010 | (long) (DW_UNSND (&die->attrs[i]))); |
| 22011 | break; |
| 22012 | case DW_FORM_data1: |
| 22013 | case DW_FORM_data2: |
| 22014 | case DW_FORM_data4: |
| 22015 | case DW_FORM_data8: |
| 22016 | case DW_FORM_udata: |
| 22017 | case DW_FORM_sdata: |
| 22018 | fprintf_unfiltered (f, "constant: %s", |
| 22019 | pulongest (DW_UNSND (&die->attrs[i]))); |
| 22020 | break; |
| 22021 | case DW_FORM_sec_offset: |
| 22022 | fprintf_unfiltered (f, "section offset: %s", |
| 22023 | pulongest (DW_UNSND (&die->attrs[i]))); |
| 22024 | break; |
| 22025 | case DW_FORM_ref_sig8: |
| 22026 | fprintf_unfiltered (f, "signature: %s", |
| 22027 | hex_string (DW_SIGNATURE (&die->attrs[i]))); |
| 22028 | break; |
| 22029 | case DW_FORM_string: |
| 22030 | case DW_FORM_strp: |
| 22031 | case DW_FORM_line_strp: |
| 22032 | case DW_FORM_strx: |
| 22033 | case DW_FORM_GNU_str_index: |
| 22034 | case DW_FORM_GNU_strp_alt: |
| 22035 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
| 22036 | DW_STRING (&die->attrs[i]) |
| 22037 | ? DW_STRING (&die->attrs[i]) : "", |
| 22038 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); |
| 22039 | break; |
| 22040 | case DW_FORM_flag: |
| 22041 | if (DW_UNSND (&die->attrs[i])) |
| 22042 | fprintf_unfiltered (f, "flag: TRUE"); |
| 22043 | else |
| 22044 | fprintf_unfiltered (f, "flag: FALSE"); |
| 22045 | break; |
| 22046 | case DW_FORM_flag_present: |
| 22047 | fprintf_unfiltered (f, "flag: TRUE"); |
| 22048 | break; |
| 22049 | case DW_FORM_indirect: |
| 22050 | /* The reader will have reduced the indirect form to |
| 22051 | the "base form" so this form should not occur. */ |
| 22052 | fprintf_unfiltered (f, |
| 22053 | "unexpected attribute form: DW_FORM_indirect"); |
| 22054 | break; |
| 22055 | case DW_FORM_implicit_const: |
| 22056 | fprintf_unfiltered (f, "constant: %s", |
| 22057 | plongest (DW_SND (&die->attrs[i]))); |
| 22058 | break; |
| 22059 | default: |
| 22060 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
| 22061 | die->attrs[i].form); |
| 22062 | break; |
| 22063 | } |
| 22064 | fprintf_unfiltered (f, "\n"); |
| 22065 | } |
| 22066 | } |
| 22067 | |
| 22068 | static void |
| 22069 | dump_die_for_error (struct die_info *die) |
| 22070 | { |
| 22071 | dump_die_shallow (gdb_stderr, 0, die); |
| 22072 | } |
| 22073 | |
| 22074 | static void |
| 22075 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) |
| 22076 | { |
| 22077 | int indent = level * 4; |
| 22078 | |
| 22079 | gdb_assert (die != NULL); |
| 22080 | |
| 22081 | if (level >= max_level) |
| 22082 | return; |
| 22083 | |
| 22084 | dump_die_shallow (f, indent, die); |
| 22085 | |
| 22086 | if (die->child != NULL) |
| 22087 | { |
| 22088 | print_spaces (indent, f); |
| 22089 | fprintf_unfiltered (f, " Children:"); |
| 22090 | if (level + 1 < max_level) |
| 22091 | { |
| 22092 | fprintf_unfiltered (f, "\n"); |
| 22093 | dump_die_1 (f, level + 1, max_level, die->child); |
| 22094 | } |
| 22095 | else |
| 22096 | { |
| 22097 | fprintf_unfiltered (f, |
| 22098 | " [not printed, max nesting level reached]\n"); |
| 22099 | } |
| 22100 | } |
| 22101 | |
| 22102 | if (die->sibling != NULL && level > 0) |
| 22103 | { |
| 22104 | dump_die_1 (f, level, max_level, die->sibling); |
| 22105 | } |
| 22106 | } |
| 22107 | |
| 22108 | /* This is called from the pdie macro in gdbinit.in. |
| 22109 | It's not static so gcc will keep a copy callable from gdb. */ |
| 22110 | |
| 22111 | void |
| 22112 | dump_die (struct die_info *die, int max_level) |
| 22113 | { |
| 22114 | dump_die_1 (gdb_stdlog, 0, max_level, die); |
| 22115 | } |
| 22116 | |
| 22117 | static void |
| 22118 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
| 22119 | { |
| 22120 | void **slot; |
| 22121 | |
| 22122 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
| 22123 | to_underlying (die->sect_off), |
| 22124 | INSERT); |
| 22125 | |
| 22126 | *slot = die; |
| 22127 | } |
| 22128 | |
| 22129 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
| 22130 | On entry *REF_CU is the CU of SRC_DIE. |
| 22131 | On exit *REF_CU is the CU of the result. */ |
| 22132 | |
| 22133 | static struct die_info * |
| 22134 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
| 22135 | struct dwarf2_cu **ref_cu) |
| 22136 | { |
| 22137 | struct die_info *die; |
| 22138 | |
| 22139 | if (attr->form_is_ref ()) |
| 22140 | die = follow_die_ref (src_die, attr, ref_cu); |
| 22141 | else if (attr->form == DW_FORM_ref_sig8) |
| 22142 | die = follow_die_sig (src_die, attr, ref_cu); |
| 22143 | else |
| 22144 | { |
| 22145 | dump_die_for_error (src_die); |
| 22146 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), |
| 22147 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 22148 | } |
| 22149 | |
| 22150 | return die; |
| 22151 | } |
| 22152 | |
| 22153 | /* Follow reference OFFSET. |
| 22154 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
| 22155 | On exit *REF_CU is the CU of the result. |
| 22156 | Returns NULL if OFFSET is invalid. */ |
| 22157 | |
| 22158 | static struct die_info * |
| 22159 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
| 22160 | struct dwarf2_cu **ref_cu) |
| 22161 | { |
| 22162 | struct die_info temp_die; |
| 22163 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
| 22164 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22165 | = cu->per_cu->dwarf2_per_objfile; |
| 22166 | |
| 22167 | gdb_assert (cu->per_cu != NULL); |
| 22168 | |
| 22169 | target_cu = cu; |
| 22170 | |
| 22171 | if (cu->per_cu->is_debug_types) |
| 22172 | { |
| 22173 | /* .debug_types CUs cannot reference anything outside their CU. |
| 22174 | If they need to, they have to reference a signatured type via |
| 22175 | DW_FORM_ref_sig8. */ |
| 22176 | if (!cu->header.offset_in_cu_p (sect_off)) |
| 22177 | return NULL; |
| 22178 | } |
| 22179 | else if (offset_in_dwz != cu->per_cu->is_dwz |
| 22180 | || !cu->header.offset_in_cu_p (sect_off)) |
| 22181 | { |
| 22182 | struct dwarf2_per_cu_data *per_cu; |
| 22183 | |
| 22184 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
| 22185 | dwarf2_per_objfile); |
| 22186 | |
| 22187 | /* If necessary, add it to the queue and load its DIEs. */ |
| 22188 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
| 22189 | load_full_comp_unit (per_cu, false, cu->language); |
| 22190 | |
| 22191 | target_cu = per_cu->cu; |
| 22192 | } |
| 22193 | else if (cu->dies == NULL) |
| 22194 | { |
| 22195 | /* We're loading full DIEs during partial symbol reading. */ |
| 22196 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); |
| 22197 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
| 22198 | } |
| 22199 | |
| 22200 | *ref_cu = target_cu; |
| 22201 | temp_die.sect_off = sect_off; |
| 22202 | |
| 22203 | if (target_cu != cu) |
| 22204 | target_cu->ancestor = cu; |
| 22205 | |
| 22206 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
| 22207 | &temp_die, |
| 22208 | to_underlying (sect_off)); |
| 22209 | } |
| 22210 | |
| 22211 | /* Follow reference attribute ATTR of SRC_DIE. |
| 22212 | On entry *REF_CU is the CU of SRC_DIE. |
| 22213 | On exit *REF_CU is the CU of the result. */ |
| 22214 | |
| 22215 | static struct die_info * |
| 22216 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
| 22217 | struct dwarf2_cu **ref_cu) |
| 22218 | { |
| 22219 | sect_offset sect_off = attr->get_ref_die_offset (); |
| 22220 | struct dwarf2_cu *cu = *ref_cu; |
| 22221 | struct die_info *die; |
| 22222 | |
| 22223 | die = follow_die_offset (sect_off, |
| 22224 | (attr->form == DW_FORM_GNU_ref_alt |
| 22225 | || cu->per_cu->is_dwz), |
| 22226 | ref_cu); |
| 22227 | if (!die) |
| 22228 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
| 22229 | "at %s [in module %s]"), |
| 22230 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), |
| 22231 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 22232 | |
| 22233 | return die; |
| 22234 | } |
| 22235 | |
| 22236 | /* See read.h. */ |
| 22237 | |
| 22238 | struct dwarf2_locexpr_baton |
| 22239 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
| 22240 | dwarf2_per_cu_data *per_cu, |
| 22241 | CORE_ADDR (*get_frame_pc) (void *baton), |
| 22242 | void *baton, bool resolve_abstract_p) |
| 22243 | { |
| 22244 | struct dwarf2_cu *cu; |
| 22245 | struct die_info *die; |
| 22246 | struct attribute *attr; |
| 22247 | struct dwarf2_locexpr_baton retval; |
| 22248 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 22249 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 22250 | |
| 22251 | if (per_cu->cu == NULL) |
| 22252 | load_cu (per_cu, false); |
| 22253 | cu = per_cu->cu; |
| 22254 | if (cu == NULL) |
| 22255 | { |
| 22256 | /* We shouldn't get here for a dummy CU, but don't crash on the user. |
| 22257 | Instead just throw an error, not much else we can do. */ |
| 22258 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
| 22259 | sect_offset_str (sect_off), objfile_name (objfile)); |
| 22260 | } |
| 22261 | |
| 22262 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 22263 | if (!die) |
| 22264 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
| 22265 | sect_offset_str (sect_off), objfile_name (objfile)); |
| 22266 | |
| 22267 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 22268 | if (!attr && resolve_abstract_p |
| 22269 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
| 22270 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
| 22271 | { |
| 22272 | CORE_ADDR pc = (*get_frame_pc) (baton); |
| 22273 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
| 22274 | struct gdbarch *gdbarch = objfile->arch (); |
| 22275 | |
| 22276 | for (const auto &cand_off |
| 22277 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) |
| 22278 | { |
| 22279 | struct dwarf2_cu *cand_cu = cu; |
| 22280 | struct die_info *cand |
| 22281 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); |
| 22282 | if (!cand |
| 22283 | || !cand->parent |
| 22284 | || cand->parent->tag != DW_TAG_subprogram) |
| 22285 | continue; |
| 22286 | |
| 22287 | CORE_ADDR pc_low, pc_high; |
| 22288 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); |
| 22289 | if (pc_low == ((CORE_ADDR) -1)) |
| 22290 | continue; |
| 22291 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); |
| 22292 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); |
| 22293 | if (!(pc_low <= pc && pc < pc_high)) |
| 22294 | continue; |
| 22295 | |
| 22296 | die = cand; |
| 22297 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 22298 | break; |
| 22299 | } |
| 22300 | } |
| 22301 | |
| 22302 | if (!attr) |
| 22303 | { |
| 22304 | /* DWARF: "If there is no such attribute, then there is no effect.". |
| 22305 | DATA is ignored if SIZE is 0. */ |
| 22306 | |
| 22307 | retval.data = NULL; |
| 22308 | retval.size = 0; |
| 22309 | } |
| 22310 | else if (attr->form_is_section_offset ()) |
| 22311 | { |
| 22312 | struct dwarf2_loclist_baton loclist_baton; |
| 22313 | CORE_ADDR pc = (*get_frame_pc) (baton); |
| 22314 | size_t size; |
| 22315 | |
| 22316 | fill_in_loclist_baton (cu, &loclist_baton, attr); |
| 22317 | |
| 22318 | retval.data = dwarf2_find_location_expression (&loclist_baton, |
| 22319 | &size, pc); |
| 22320 | retval.size = size; |
| 22321 | } |
| 22322 | else |
| 22323 | { |
| 22324 | if (!attr->form_is_block ()) |
| 22325 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
| 22326 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
| 22327 | sect_offset_str (sect_off), objfile_name (objfile)); |
| 22328 | |
| 22329 | retval.data = DW_BLOCK (attr)->data; |
| 22330 | retval.size = DW_BLOCK (attr)->size; |
| 22331 | } |
| 22332 | retval.per_cu = cu->per_cu; |
| 22333 | |
| 22334 | age_cached_comp_units (dwarf2_per_objfile); |
| 22335 | |
| 22336 | return retval; |
| 22337 | } |
| 22338 | |
| 22339 | /* See read.h. */ |
| 22340 | |
| 22341 | struct dwarf2_locexpr_baton |
| 22342 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, |
| 22343 | dwarf2_per_cu_data *per_cu, |
| 22344 | CORE_ADDR (*get_frame_pc) (void *baton), |
| 22345 | void *baton) |
| 22346 | { |
| 22347 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
| 22348 | |
| 22349 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
| 22350 | } |
| 22351 | |
| 22352 | /* Write a constant of a given type as target-ordered bytes into |
| 22353 | OBSTACK. */ |
| 22354 | |
| 22355 | static const gdb_byte * |
| 22356 | write_constant_as_bytes (struct obstack *obstack, |
| 22357 | enum bfd_endian byte_order, |
| 22358 | struct type *type, |
| 22359 | ULONGEST value, |
| 22360 | LONGEST *len) |
| 22361 | { |
| 22362 | gdb_byte *result; |
| 22363 | |
| 22364 | *len = TYPE_LENGTH (type); |
| 22365 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
| 22366 | store_unsigned_integer (result, *len, byte_order, value); |
| 22367 | |
| 22368 | return result; |
| 22369 | } |
| 22370 | |
| 22371 | /* See read.h. */ |
| 22372 | |
| 22373 | const gdb_byte * |
| 22374 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
| 22375 | dwarf2_per_cu_data *per_cu, |
| 22376 | obstack *obstack, |
| 22377 | LONGEST *len) |
| 22378 | { |
| 22379 | struct dwarf2_cu *cu; |
| 22380 | struct die_info *die; |
| 22381 | struct attribute *attr; |
| 22382 | const gdb_byte *result = NULL; |
| 22383 | struct type *type; |
| 22384 | LONGEST value; |
| 22385 | enum bfd_endian byte_order; |
| 22386 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 22387 | |
| 22388 | if (per_cu->cu == NULL) |
| 22389 | load_cu (per_cu, false); |
| 22390 | cu = per_cu->cu; |
| 22391 | if (cu == NULL) |
| 22392 | { |
| 22393 | /* We shouldn't get here for a dummy CU, but don't crash on the user. |
| 22394 | Instead just throw an error, not much else we can do. */ |
| 22395 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
| 22396 | sect_offset_str (sect_off), objfile_name (objfile)); |
| 22397 | } |
| 22398 | |
| 22399 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 22400 | if (!die) |
| 22401 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
| 22402 | sect_offset_str (sect_off), objfile_name (objfile)); |
| 22403 | |
| 22404 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 22405 | if (attr == NULL) |
| 22406 | return NULL; |
| 22407 | |
| 22408 | byte_order = (bfd_big_endian (objfile->obfd) |
| 22409 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
| 22410 | |
| 22411 | switch (attr->form) |
| 22412 | { |
| 22413 | case DW_FORM_addr: |
| 22414 | case DW_FORM_addrx: |
| 22415 | case DW_FORM_GNU_addr_index: |
| 22416 | { |
| 22417 | gdb_byte *tem; |
| 22418 | |
| 22419 | *len = cu->header.addr_size; |
| 22420 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
| 22421 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
| 22422 | result = tem; |
| 22423 | } |
| 22424 | break; |
| 22425 | case DW_FORM_string: |
| 22426 | case DW_FORM_strp: |
| 22427 | case DW_FORM_strx: |
| 22428 | case DW_FORM_GNU_str_index: |
| 22429 | case DW_FORM_GNU_strp_alt: |
| 22430 | /* DW_STRING is already allocated on the objfile obstack, point |
| 22431 | directly to it. */ |
| 22432 | result = (const gdb_byte *) DW_STRING (attr); |
| 22433 | *len = strlen (DW_STRING (attr)); |
| 22434 | break; |
| 22435 | case DW_FORM_block1: |
| 22436 | case DW_FORM_block2: |
| 22437 | case DW_FORM_block4: |
| 22438 | case DW_FORM_block: |
| 22439 | case DW_FORM_exprloc: |
| 22440 | case DW_FORM_data16: |
| 22441 | result = DW_BLOCK (attr)->data; |
| 22442 | *len = DW_BLOCK (attr)->size; |
| 22443 | break; |
| 22444 | |
| 22445 | /* The DW_AT_const_value attributes are supposed to carry the |
| 22446 | symbol's value "represented as it would be on the target |
| 22447 | architecture." By the time we get here, it's already been |
| 22448 | converted to host endianness, so we just need to sign- or |
| 22449 | zero-extend it as appropriate. */ |
| 22450 | case DW_FORM_data1: |
| 22451 | type = die_type (die, cu); |
| 22452 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); |
| 22453 | if (result == NULL) |
| 22454 | result = write_constant_as_bytes (obstack, byte_order, |
| 22455 | type, value, len); |
| 22456 | break; |
| 22457 | case DW_FORM_data2: |
| 22458 | type = die_type (die, cu); |
| 22459 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); |
| 22460 | if (result == NULL) |
| 22461 | result = write_constant_as_bytes (obstack, byte_order, |
| 22462 | type, value, len); |
| 22463 | break; |
| 22464 | case DW_FORM_data4: |
| 22465 | type = die_type (die, cu); |
| 22466 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); |
| 22467 | if (result == NULL) |
| 22468 | result = write_constant_as_bytes (obstack, byte_order, |
| 22469 | type, value, len); |
| 22470 | break; |
| 22471 | case DW_FORM_data8: |
| 22472 | type = die_type (die, cu); |
| 22473 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); |
| 22474 | if (result == NULL) |
| 22475 | result = write_constant_as_bytes (obstack, byte_order, |
| 22476 | type, value, len); |
| 22477 | break; |
| 22478 | |
| 22479 | case DW_FORM_sdata: |
| 22480 | case DW_FORM_implicit_const: |
| 22481 | type = die_type (die, cu); |
| 22482 | result = write_constant_as_bytes (obstack, byte_order, |
| 22483 | type, DW_SND (attr), len); |
| 22484 | break; |
| 22485 | |
| 22486 | case DW_FORM_udata: |
| 22487 | type = die_type (die, cu); |
| 22488 | result = write_constant_as_bytes (obstack, byte_order, |
| 22489 | type, DW_UNSND (attr), len); |
| 22490 | break; |
| 22491 | |
| 22492 | default: |
| 22493 | complaint (_("unsupported const value attribute form: '%s'"), |
| 22494 | dwarf_form_name (attr->form)); |
| 22495 | break; |
| 22496 | } |
| 22497 | |
| 22498 | return result; |
| 22499 | } |
| 22500 | |
| 22501 | /* See read.h. */ |
| 22502 | |
| 22503 | struct type * |
| 22504 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
| 22505 | dwarf2_per_cu_data *per_cu) |
| 22506 | { |
| 22507 | struct dwarf2_cu *cu; |
| 22508 | struct die_info *die; |
| 22509 | |
| 22510 | if (per_cu->cu == NULL) |
| 22511 | load_cu (per_cu, false); |
| 22512 | cu = per_cu->cu; |
| 22513 | if (!cu) |
| 22514 | return NULL; |
| 22515 | |
| 22516 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 22517 | if (!die) |
| 22518 | return NULL; |
| 22519 | |
| 22520 | return die_type (die, cu); |
| 22521 | } |
| 22522 | |
| 22523 | /* See read.h. */ |
| 22524 | |
| 22525 | struct type * |
| 22526 | dwarf2_get_die_type (cu_offset die_offset, |
| 22527 | struct dwarf2_per_cu_data *per_cu) |
| 22528 | { |
| 22529 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
| 22530 | return get_die_type_at_offset (die_offset_sect, per_cu); |
| 22531 | } |
| 22532 | |
| 22533 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
| 22534 | On entry *REF_CU is the CU of SRC_DIE. |
| 22535 | On exit *REF_CU is the CU of the result. |
| 22536 | Returns NULL if the referenced DIE isn't found. */ |
| 22537 | |
| 22538 | static struct die_info * |
| 22539 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
| 22540 | struct dwarf2_cu **ref_cu) |
| 22541 | { |
| 22542 | struct die_info temp_die; |
| 22543 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
| 22544 | struct die_info *die; |
| 22545 | |
| 22546 | /* While it might be nice to assert sig_type->type == NULL here, |
| 22547 | we can get here for DW_AT_imported_declaration where we need |
| 22548 | the DIE not the type. */ |
| 22549 | |
| 22550 | /* If necessary, add it to the queue and load its DIEs. */ |
| 22551 | |
| 22552 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
| 22553 | read_signatured_type (sig_type); |
| 22554 | |
| 22555 | sig_cu = sig_type->per_cu.cu; |
| 22556 | gdb_assert (sig_cu != NULL); |
| 22557 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
| 22558 | temp_die.sect_off = sig_type->type_offset_in_section; |
| 22559 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
| 22560 | to_underlying (temp_die.sect_off)); |
| 22561 | if (die) |
| 22562 | { |
| 22563 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22564 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
| 22565 | |
| 22566 | /* For .gdb_index version 7 keep track of included TUs. |
| 22567 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ |
| 22568 | if (dwarf2_per_objfile->index_table != NULL |
| 22569 | && dwarf2_per_objfile->index_table->version <= 7) |
| 22570 | { |
| 22571 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
| 22572 | } |
| 22573 | |
| 22574 | *ref_cu = sig_cu; |
| 22575 | if (sig_cu != cu) |
| 22576 | sig_cu->ancestor = cu; |
| 22577 | |
| 22578 | return die; |
| 22579 | } |
| 22580 | |
| 22581 | return NULL; |
| 22582 | } |
| 22583 | |
| 22584 | /* Follow signatured type referenced by ATTR in SRC_DIE. |
| 22585 | On entry *REF_CU is the CU of SRC_DIE. |
| 22586 | On exit *REF_CU is the CU of the result. |
| 22587 | The result is the DIE of the type. |
| 22588 | If the referenced type cannot be found an error is thrown. */ |
| 22589 | |
| 22590 | static struct die_info * |
| 22591 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
| 22592 | struct dwarf2_cu **ref_cu) |
| 22593 | { |
| 22594 | ULONGEST signature = DW_SIGNATURE (attr); |
| 22595 | struct signatured_type *sig_type; |
| 22596 | struct die_info *die; |
| 22597 | |
| 22598 | gdb_assert (attr->form == DW_FORM_ref_sig8); |
| 22599 | |
| 22600 | sig_type = lookup_signatured_type (*ref_cu, signature); |
| 22601 | /* sig_type will be NULL if the signatured type is missing from |
| 22602 | the debug info. */ |
| 22603 | if (sig_type == NULL) |
| 22604 | { |
| 22605 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
| 22606 | " from DIE at %s [in module %s]"), |
| 22607 | hex_string (signature), sect_offset_str (src_die->sect_off), |
| 22608 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 22609 | } |
| 22610 | |
| 22611 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); |
| 22612 | if (die == NULL) |
| 22613 | { |
| 22614 | dump_die_for_error (src_die); |
| 22615 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
| 22616 | " from DIE at %s [in module %s]"), |
| 22617 | hex_string (signature), sect_offset_str (src_die->sect_off), |
| 22618 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 22619 | } |
| 22620 | |
| 22621 | return die; |
| 22622 | } |
| 22623 | |
| 22624 | /* Get the type specified by SIGNATURE referenced in DIE/CU, |
| 22625 | reading in and processing the type unit if necessary. */ |
| 22626 | |
| 22627 | static struct type * |
| 22628 | get_signatured_type (struct die_info *die, ULONGEST signature, |
| 22629 | struct dwarf2_cu *cu) |
| 22630 | { |
| 22631 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22632 | = cu->per_cu->dwarf2_per_objfile; |
| 22633 | struct signatured_type *sig_type; |
| 22634 | struct dwarf2_cu *type_cu; |
| 22635 | struct die_info *type_die; |
| 22636 | struct type *type; |
| 22637 | |
| 22638 | sig_type = lookup_signatured_type (cu, signature); |
| 22639 | /* sig_type will be NULL if the signatured type is missing from |
| 22640 | the debug info. */ |
| 22641 | if (sig_type == NULL) |
| 22642 | { |
| 22643 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
| 22644 | " from DIE at %s [in module %s]"), |
| 22645 | hex_string (signature), sect_offset_str (die->sect_off), |
| 22646 | objfile_name (dwarf2_per_objfile->objfile)); |
| 22647 | return build_error_marker_type (cu, die); |
| 22648 | } |
| 22649 | |
| 22650 | /* If we already know the type we're done. */ |
| 22651 | if (sig_type->type != NULL) |
| 22652 | return sig_type->type; |
| 22653 | |
| 22654 | type_cu = cu; |
| 22655 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); |
| 22656 | if (type_die != NULL) |
| 22657 | { |
| 22658 | /* N.B. We need to call get_die_type to ensure only one type for this DIE |
| 22659 | is created. This is important, for example, because for c++ classes |
| 22660 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ |
| 22661 | type = read_type_die (type_die, type_cu); |
| 22662 | if (type == NULL) |
| 22663 | { |
| 22664 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
| 22665 | " referenced from DIE at %s [in module %s]"), |
| 22666 | hex_string (signature), sect_offset_str (die->sect_off), |
| 22667 | objfile_name (dwarf2_per_objfile->objfile)); |
| 22668 | type = build_error_marker_type (cu, die); |
| 22669 | } |
| 22670 | } |
| 22671 | else |
| 22672 | { |
| 22673 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
| 22674 | " from DIE at %s [in module %s]"), |
| 22675 | hex_string (signature), sect_offset_str (die->sect_off), |
| 22676 | objfile_name (dwarf2_per_objfile->objfile)); |
| 22677 | type = build_error_marker_type (cu, die); |
| 22678 | } |
| 22679 | sig_type->type = type; |
| 22680 | |
| 22681 | return type; |
| 22682 | } |
| 22683 | |
| 22684 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, |
| 22685 | reading in and processing the type unit if necessary. */ |
| 22686 | |
| 22687 | static struct type * |
| 22688 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
| 22689 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
| 22690 | { |
| 22691 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ |
| 22692 | if (attr->form_is_ref ()) |
| 22693 | { |
| 22694 | struct dwarf2_cu *type_cu = cu; |
| 22695 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); |
| 22696 | |
| 22697 | return read_type_die (type_die, type_cu); |
| 22698 | } |
| 22699 | else if (attr->form == DW_FORM_ref_sig8) |
| 22700 | { |
| 22701 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); |
| 22702 | } |
| 22703 | else |
| 22704 | { |
| 22705 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22706 | = cu->per_cu->dwarf2_per_objfile; |
| 22707 | |
| 22708 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
| 22709 | " at %s [in module %s]"), |
| 22710 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), |
| 22711 | objfile_name (dwarf2_per_objfile->objfile)); |
| 22712 | return build_error_marker_type (cu, die); |
| 22713 | } |
| 22714 | } |
| 22715 | |
| 22716 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
| 22717 | |
| 22718 | static void |
| 22719 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
| 22720 | { |
| 22721 | struct signatured_type *sig_type; |
| 22722 | |
| 22723 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
| 22724 | gdb_assert (! per_cu->type_unit_group_p ()); |
| 22725 | |
| 22726 | /* We have the per_cu, but we need the signatured_type. |
| 22727 | Fortunately this is an easy translation. */ |
| 22728 | gdb_assert (per_cu->is_debug_types); |
| 22729 | sig_type = (struct signatured_type *) per_cu; |
| 22730 | |
| 22731 | gdb_assert (per_cu->cu == NULL); |
| 22732 | |
| 22733 | read_signatured_type (sig_type); |
| 22734 | |
| 22735 | gdb_assert (per_cu->cu != NULL); |
| 22736 | } |
| 22737 | |
| 22738 | /* Read in a signatured type and build its CU and DIEs. |
| 22739 | If the type is a stub for the real type in a DWO file, |
| 22740 | read in the real type from the DWO file as well. */ |
| 22741 | |
| 22742 | static void |
| 22743 | read_signatured_type (struct signatured_type *sig_type) |
| 22744 | { |
| 22745 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; |
| 22746 | |
| 22747 | gdb_assert (per_cu->is_debug_types); |
| 22748 | gdb_assert (per_cu->cu == NULL); |
| 22749 | |
| 22750 | cutu_reader reader (per_cu, NULL, 0, false); |
| 22751 | |
| 22752 | if (!reader.dummy_p) |
| 22753 | { |
| 22754 | struct dwarf2_cu *cu = reader.cu; |
| 22755 | const gdb_byte *info_ptr = reader.info_ptr; |
| 22756 | |
| 22757 | gdb_assert (cu->die_hash == NULL); |
| 22758 | cu->die_hash = |
| 22759 | htab_create_alloc_ex (cu->header.length / 12, |
| 22760 | die_hash, |
| 22761 | die_eq, |
| 22762 | NULL, |
| 22763 | &cu->comp_unit_obstack, |
| 22764 | hashtab_obstack_allocate, |
| 22765 | dummy_obstack_deallocate); |
| 22766 | |
| 22767 | if (reader.comp_unit_die->has_children) |
| 22768 | reader.comp_unit_die->child |
| 22769 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, |
| 22770 | reader.comp_unit_die); |
| 22771 | cu->dies = reader.comp_unit_die; |
| 22772 | /* comp_unit_die is not stored in die_hash, no need. */ |
| 22773 | |
| 22774 | /* We try not to read any attributes in this function, because |
| 22775 | not all CUs needed for references have been loaded yet, and |
| 22776 | symbol table processing isn't initialized. But we have to |
| 22777 | set the CU language, or we won't be able to build types |
| 22778 | correctly. Similarly, if we do not read the producer, we can |
| 22779 | not apply producer-specific interpretation. */ |
| 22780 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
| 22781 | |
| 22782 | reader.keep (); |
| 22783 | } |
| 22784 | |
| 22785 | sig_type->per_cu.tu_read = 1; |
| 22786 | } |
| 22787 | |
| 22788 | /* Decode simple location descriptions. |
| 22789 | Given a pointer to a dwarf block that defines a location, compute |
| 22790 | the location and return the value. If COMPUTED is non-null, it is |
| 22791 | set to true to indicate that decoding was successful, and false |
| 22792 | otherwise. If COMPUTED is null, then this function may emit a |
| 22793 | complaint. */ |
| 22794 | |
| 22795 | static CORE_ADDR |
| 22796 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu, bool *computed) |
| 22797 | { |
| 22798 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 22799 | size_t i; |
| 22800 | size_t size = blk->size; |
| 22801 | const gdb_byte *data = blk->data; |
| 22802 | CORE_ADDR stack[64]; |
| 22803 | int stacki; |
| 22804 | unsigned int bytes_read, unsnd; |
| 22805 | gdb_byte op; |
| 22806 | |
| 22807 | if (computed != nullptr) |
| 22808 | *computed = false; |
| 22809 | |
| 22810 | i = 0; |
| 22811 | stacki = 0; |
| 22812 | stack[stacki] = 0; |
| 22813 | stack[++stacki] = 0; |
| 22814 | |
| 22815 | while (i < size) |
| 22816 | { |
| 22817 | op = data[i++]; |
| 22818 | switch (op) |
| 22819 | { |
| 22820 | case DW_OP_lit0: |
| 22821 | case DW_OP_lit1: |
| 22822 | case DW_OP_lit2: |
| 22823 | case DW_OP_lit3: |
| 22824 | case DW_OP_lit4: |
| 22825 | case DW_OP_lit5: |
| 22826 | case DW_OP_lit6: |
| 22827 | case DW_OP_lit7: |
| 22828 | case DW_OP_lit8: |
| 22829 | case DW_OP_lit9: |
| 22830 | case DW_OP_lit10: |
| 22831 | case DW_OP_lit11: |
| 22832 | case DW_OP_lit12: |
| 22833 | case DW_OP_lit13: |
| 22834 | case DW_OP_lit14: |
| 22835 | case DW_OP_lit15: |
| 22836 | case DW_OP_lit16: |
| 22837 | case DW_OP_lit17: |
| 22838 | case DW_OP_lit18: |
| 22839 | case DW_OP_lit19: |
| 22840 | case DW_OP_lit20: |
| 22841 | case DW_OP_lit21: |
| 22842 | case DW_OP_lit22: |
| 22843 | case DW_OP_lit23: |
| 22844 | case DW_OP_lit24: |
| 22845 | case DW_OP_lit25: |
| 22846 | case DW_OP_lit26: |
| 22847 | case DW_OP_lit27: |
| 22848 | case DW_OP_lit28: |
| 22849 | case DW_OP_lit29: |
| 22850 | case DW_OP_lit30: |
| 22851 | case DW_OP_lit31: |
| 22852 | stack[++stacki] = op - DW_OP_lit0; |
| 22853 | break; |
| 22854 | |
| 22855 | case DW_OP_reg0: |
| 22856 | case DW_OP_reg1: |
| 22857 | case DW_OP_reg2: |
| 22858 | case DW_OP_reg3: |
| 22859 | case DW_OP_reg4: |
| 22860 | case DW_OP_reg5: |
| 22861 | case DW_OP_reg6: |
| 22862 | case DW_OP_reg7: |
| 22863 | case DW_OP_reg8: |
| 22864 | case DW_OP_reg9: |
| 22865 | case DW_OP_reg10: |
| 22866 | case DW_OP_reg11: |
| 22867 | case DW_OP_reg12: |
| 22868 | case DW_OP_reg13: |
| 22869 | case DW_OP_reg14: |
| 22870 | case DW_OP_reg15: |
| 22871 | case DW_OP_reg16: |
| 22872 | case DW_OP_reg17: |
| 22873 | case DW_OP_reg18: |
| 22874 | case DW_OP_reg19: |
| 22875 | case DW_OP_reg20: |
| 22876 | case DW_OP_reg21: |
| 22877 | case DW_OP_reg22: |
| 22878 | case DW_OP_reg23: |
| 22879 | case DW_OP_reg24: |
| 22880 | case DW_OP_reg25: |
| 22881 | case DW_OP_reg26: |
| 22882 | case DW_OP_reg27: |
| 22883 | case DW_OP_reg28: |
| 22884 | case DW_OP_reg29: |
| 22885 | case DW_OP_reg30: |
| 22886 | case DW_OP_reg31: |
| 22887 | stack[++stacki] = op - DW_OP_reg0; |
| 22888 | if (i < size) |
| 22889 | { |
| 22890 | if (computed == nullptr) |
| 22891 | dwarf2_complex_location_expr_complaint (); |
| 22892 | else |
| 22893 | return 0; |
| 22894 | } |
| 22895 | break; |
| 22896 | |
| 22897 | case DW_OP_regx: |
| 22898 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 22899 | i += bytes_read; |
| 22900 | stack[++stacki] = unsnd; |
| 22901 | if (i < size) |
| 22902 | { |
| 22903 | if (computed == nullptr) |
| 22904 | dwarf2_complex_location_expr_complaint (); |
| 22905 | else |
| 22906 | return 0; |
| 22907 | } |
| 22908 | break; |
| 22909 | |
| 22910 | case DW_OP_addr: |
| 22911 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
| 22912 | &bytes_read); |
| 22913 | i += bytes_read; |
| 22914 | break; |
| 22915 | |
| 22916 | case DW_OP_const1u: |
| 22917 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); |
| 22918 | i += 1; |
| 22919 | break; |
| 22920 | |
| 22921 | case DW_OP_const1s: |
| 22922 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); |
| 22923 | i += 1; |
| 22924 | break; |
| 22925 | |
| 22926 | case DW_OP_const2u: |
| 22927 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); |
| 22928 | i += 2; |
| 22929 | break; |
| 22930 | |
| 22931 | case DW_OP_const2s: |
| 22932 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); |
| 22933 | i += 2; |
| 22934 | break; |
| 22935 | |
| 22936 | case DW_OP_const4u: |
| 22937 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); |
| 22938 | i += 4; |
| 22939 | break; |
| 22940 | |
| 22941 | case DW_OP_const4s: |
| 22942 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); |
| 22943 | i += 4; |
| 22944 | break; |
| 22945 | |
| 22946 | case DW_OP_const8u: |
| 22947 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); |
| 22948 | i += 8; |
| 22949 | break; |
| 22950 | |
| 22951 | case DW_OP_constu: |
| 22952 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), |
| 22953 | &bytes_read); |
| 22954 | i += bytes_read; |
| 22955 | break; |
| 22956 | |
| 22957 | case DW_OP_consts: |
| 22958 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 22959 | i += bytes_read; |
| 22960 | break; |
| 22961 | |
| 22962 | case DW_OP_dup: |
| 22963 | stack[stacki + 1] = stack[stacki]; |
| 22964 | stacki++; |
| 22965 | break; |
| 22966 | |
| 22967 | case DW_OP_plus: |
| 22968 | stack[stacki - 1] += stack[stacki]; |
| 22969 | stacki--; |
| 22970 | break; |
| 22971 | |
| 22972 | case DW_OP_plus_uconst: |
| 22973 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), |
| 22974 | &bytes_read); |
| 22975 | i += bytes_read; |
| 22976 | break; |
| 22977 | |
| 22978 | case DW_OP_minus: |
| 22979 | stack[stacki - 1] -= stack[stacki]; |
| 22980 | stacki--; |
| 22981 | break; |
| 22982 | |
| 22983 | case DW_OP_deref: |
| 22984 | /* If we're not the last op, then we definitely can't encode |
| 22985 | this using GDB's address_class enum. This is valid for partial |
| 22986 | global symbols, although the variable's address will be bogus |
| 22987 | in the psymtab. */ |
| 22988 | if (i < size) |
| 22989 | { |
| 22990 | if (computed == nullptr) |
| 22991 | dwarf2_complex_location_expr_complaint (); |
| 22992 | else |
| 22993 | return 0; |
| 22994 | } |
| 22995 | break; |
| 22996 | |
| 22997 | case DW_OP_GNU_push_tls_address: |
| 22998 | case DW_OP_form_tls_address: |
| 22999 | /* The top of the stack has the offset from the beginning |
| 23000 | of the thread control block at which the variable is located. */ |
| 23001 | /* Nothing should follow this operator, so the top of stack would |
| 23002 | be returned. */ |
| 23003 | /* This is valid for partial global symbols, but the variable's |
| 23004 | address will be bogus in the psymtab. Make it always at least |
| 23005 | non-zero to not look as a variable garbage collected by linker |
| 23006 | which have DW_OP_addr 0. */ |
| 23007 | if (i < size) |
| 23008 | { |
| 23009 | if (computed == nullptr) |
| 23010 | dwarf2_complex_location_expr_complaint (); |
| 23011 | else |
| 23012 | return 0; |
| 23013 | } |
| 23014 | stack[stacki]++; |
| 23015 | break; |
| 23016 | |
| 23017 | case DW_OP_GNU_uninit: |
| 23018 | if (computed != nullptr) |
| 23019 | return 0; |
| 23020 | break; |
| 23021 | |
| 23022 | case DW_OP_addrx: |
| 23023 | case DW_OP_GNU_addr_index: |
| 23024 | case DW_OP_GNU_const_index: |
| 23025 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
| 23026 | &bytes_read); |
| 23027 | i += bytes_read; |
| 23028 | break; |
| 23029 | |
| 23030 | default: |
| 23031 | if (computed == nullptr) |
| 23032 | { |
| 23033 | const char *name = get_DW_OP_name (op); |
| 23034 | |
| 23035 | if (name) |
| 23036 | complaint (_("unsupported stack op: '%s'"), |
| 23037 | name); |
| 23038 | else |
| 23039 | complaint (_("unsupported stack op: '%02x'"), |
| 23040 | op); |
| 23041 | } |
| 23042 | |
| 23043 | return (stack[stacki]); |
| 23044 | } |
| 23045 | |
| 23046 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
| 23047 | outside of the allocated space. Also enforce minimum>0. */ |
| 23048 | if (stacki >= ARRAY_SIZE (stack) - 1) |
| 23049 | { |
| 23050 | if (computed == nullptr) |
| 23051 | complaint (_("location description stack overflow")); |
| 23052 | return 0; |
| 23053 | } |
| 23054 | |
| 23055 | if (stacki <= 0) |
| 23056 | { |
| 23057 | if (computed == nullptr) |
| 23058 | complaint (_("location description stack underflow")); |
| 23059 | return 0; |
| 23060 | } |
| 23061 | } |
| 23062 | |
| 23063 | if (computed != nullptr) |
| 23064 | *computed = true; |
| 23065 | return (stack[stacki]); |
| 23066 | } |
| 23067 | |
| 23068 | /* memory allocation interface */ |
| 23069 | |
| 23070 | static struct dwarf_block * |
| 23071 | dwarf_alloc_block (struct dwarf2_cu *cu) |
| 23072 | { |
| 23073 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
| 23074 | } |
| 23075 | |
| 23076 | static struct die_info * |
| 23077 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
| 23078 | { |
| 23079 | struct die_info *die; |
| 23080 | size_t size = sizeof (struct die_info); |
| 23081 | |
| 23082 | if (num_attrs > 1) |
| 23083 | size += (num_attrs - 1) * sizeof (struct attribute); |
| 23084 | |
| 23085 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
| 23086 | memset (die, 0, sizeof (struct die_info)); |
| 23087 | return (die); |
| 23088 | } |
| 23089 | |
| 23090 | \f |
| 23091 | |
| 23092 | /* Macro support. */ |
| 23093 | |
| 23094 | /* An overload of dwarf_decode_macros that finds the correct section |
| 23095 | and ensures it is read in before calling the other overload. */ |
| 23096 | |
| 23097 | static void |
| 23098 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
| 23099 | int section_is_gnu) |
| 23100 | { |
| 23101 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23102 | = cu->per_cu->dwarf2_per_objfile; |
| 23103 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23104 | const struct line_header *lh = cu->line_header; |
| 23105 | unsigned int offset_size = cu->header.offset_size; |
| 23106 | struct dwarf2_section_info *section; |
| 23107 | const char *section_name; |
| 23108 | |
| 23109 | if (cu->dwo_unit != nullptr) |
| 23110 | { |
| 23111 | if (section_is_gnu) |
| 23112 | { |
| 23113 | section = &cu->dwo_unit->dwo_file->sections.macro; |
| 23114 | section_name = ".debug_macro.dwo"; |
| 23115 | } |
| 23116 | else |
| 23117 | { |
| 23118 | section = &cu->dwo_unit->dwo_file->sections.macinfo; |
| 23119 | section_name = ".debug_macinfo.dwo"; |
| 23120 | } |
| 23121 | } |
| 23122 | else |
| 23123 | { |
| 23124 | if (section_is_gnu) |
| 23125 | { |
| 23126 | section = &dwarf2_per_objfile->macro; |
| 23127 | section_name = ".debug_macro"; |
| 23128 | } |
| 23129 | else |
| 23130 | { |
| 23131 | section = &dwarf2_per_objfile->macinfo; |
| 23132 | section_name = ".debug_macinfo"; |
| 23133 | } |
| 23134 | } |
| 23135 | |
| 23136 | section->read (objfile); |
| 23137 | if (section->buffer == nullptr) |
| 23138 | { |
| 23139 | complaint (_("missing %s section"), section_name); |
| 23140 | return; |
| 23141 | } |
| 23142 | |
| 23143 | buildsym_compunit *builder = cu->get_builder (); |
| 23144 | |
| 23145 | dwarf_decode_macros (dwarf2_per_objfile, builder, section, lh, |
| 23146 | offset_size, offset, section_is_gnu); |
| 23147 | } |
| 23148 | |
| 23149 | /* Return the .debug_loc section to use for CU. |
| 23150 | For DWO files use .debug_loc.dwo. */ |
| 23151 | |
| 23152 | static struct dwarf2_section_info * |
| 23153 | cu_debug_loc_section (struct dwarf2_cu *cu) |
| 23154 | { |
| 23155 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23156 | = cu->per_cu->dwarf2_per_objfile; |
| 23157 | |
| 23158 | if (cu->dwo_unit) |
| 23159 | { |
| 23160 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; |
| 23161 | |
| 23162 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
| 23163 | } |
| 23164 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists |
| 23165 | : &dwarf2_per_objfile->loc); |
| 23166 | } |
| 23167 | |
| 23168 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
| 23169 | |
| 23170 | static void |
| 23171 | fill_in_loclist_baton (struct dwarf2_cu *cu, |
| 23172 | struct dwarf2_loclist_baton *baton, |
| 23173 | const struct attribute *attr) |
| 23174 | { |
| 23175 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23176 | = cu->per_cu->dwarf2_per_objfile; |
| 23177 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
| 23178 | |
| 23179 | section->read (dwarf2_per_objfile->objfile); |
| 23180 | |
| 23181 | baton->per_cu = cu->per_cu; |
| 23182 | gdb_assert (baton->per_cu); |
| 23183 | /* We don't know how long the location list is, but make sure we |
| 23184 | don't run off the edge of the section. */ |
| 23185 | baton->size = section->size - DW_UNSND (attr); |
| 23186 | baton->data = section->buffer + DW_UNSND (attr); |
| 23187 | if (cu->base_address.has_value ()) |
| 23188 | baton->base_address = *cu->base_address; |
| 23189 | else |
| 23190 | baton->base_address = 0; |
| 23191 | baton->from_dwo = cu->dwo_unit != NULL; |
| 23192 | } |
| 23193 | |
| 23194 | static void |
| 23195 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
| 23196 | struct dwarf2_cu *cu, int is_block) |
| 23197 | { |
| 23198 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23199 | = cu->per_cu->dwarf2_per_objfile; |
| 23200 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23201 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
| 23202 | |
| 23203 | if (attr->form_is_section_offset () |
| 23204 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
| 23205 | the section. If so, fall through to the complaint in the |
| 23206 | other branch. */ |
| 23207 | && DW_UNSND (attr) < section->get_size (objfile)) |
| 23208 | { |
| 23209 | struct dwarf2_loclist_baton *baton; |
| 23210 | |
| 23211 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
| 23212 | |
| 23213 | fill_in_loclist_baton (cu, baton, attr); |
| 23214 | |
| 23215 | if (!cu->base_address.has_value ()) |
| 23216 | complaint (_("Location list used without " |
| 23217 | "specifying the CU base address.")); |
| 23218 | |
| 23219 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
| 23220 | ? dwarf2_loclist_block_index |
| 23221 | : dwarf2_loclist_index); |
| 23222 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 23223 | } |
| 23224 | else |
| 23225 | { |
| 23226 | struct dwarf2_locexpr_baton *baton; |
| 23227 | |
| 23228 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 23229 | baton->per_cu = cu->per_cu; |
| 23230 | gdb_assert (baton->per_cu); |
| 23231 | |
| 23232 | if (attr->form_is_block ()) |
| 23233 | { |
| 23234 | /* Note that we're just copying the block's data pointer |
| 23235 | here, not the actual data. We're still pointing into the |
| 23236 | info_buffer for SYM's objfile; right now we never release |
| 23237 | that buffer, but when we do clean up properly this may |
| 23238 | need to change. */ |
| 23239 | baton->size = DW_BLOCK (attr)->size; |
| 23240 | baton->data = DW_BLOCK (attr)->data; |
| 23241 | } |
| 23242 | else |
| 23243 | { |
| 23244 | dwarf2_invalid_attrib_class_complaint ("location description", |
| 23245 | sym->natural_name ()); |
| 23246 | baton->size = 0; |
| 23247 | } |
| 23248 | |
| 23249 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
| 23250 | ? dwarf2_locexpr_block_index |
| 23251 | : dwarf2_locexpr_index); |
| 23252 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 23253 | } |
| 23254 | } |
| 23255 | |
| 23256 | /* See read.h. */ |
| 23257 | |
| 23258 | struct objfile * |
| 23259 | dwarf2_per_cu_data::objfile () const |
| 23260 | { |
| 23261 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23262 | |
| 23263 | /* Return the master objfile, so that we can report and look up the |
| 23264 | correct file containing this variable. */ |
| 23265 | if (objfile->separate_debug_objfile_backlink) |
| 23266 | objfile = objfile->separate_debug_objfile_backlink; |
| 23267 | |
| 23268 | return objfile; |
| 23269 | } |
| 23270 | |
| 23271 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
| 23272 | (CU_HEADERP is unused in such case) or prepare a temporary copy at |
| 23273 | CU_HEADERP first. */ |
| 23274 | |
| 23275 | static const struct comp_unit_head * |
| 23276 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, |
| 23277 | const struct dwarf2_per_cu_data *per_cu) |
| 23278 | { |
| 23279 | const gdb_byte *info_ptr; |
| 23280 | |
| 23281 | if (per_cu->cu) |
| 23282 | return &per_cu->cu->header; |
| 23283 | |
| 23284 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
| 23285 | |
| 23286 | memset (cu_headerp, 0, sizeof (*cu_headerp)); |
| 23287 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
| 23288 | rcuh_kind::COMPILE); |
| 23289 | |
| 23290 | return cu_headerp; |
| 23291 | } |
| 23292 | |
| 23293 | /* See read.h. */ |
| 23294 | |
| 23295 | int |
| 23296 | dwarf2_per_cu_data::addr_size () const |
| 23297 | { |
| 23298 | struct comp_unit_head cu_header_local; |
| 23299 | const struct comp_unit_head *cu_headerp; |
| 23300 | |
| 23301 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
| 23302 | |
| 23303 | return cu_headerp->addr_size; |
| 23304 | } |
| 23305 | |
| 23306 | /* See read.h. */ |
| 23307 | |
| 23308 | int |
| 23309 | dwarf2_per_cu_data::offset_size () const |
| 23310 | { |
| 23311 | struct comp_unit_head cu_header_local; |
| 23312 | const struct comp_unit_head *cu_headerp; |
| 23313 | |
| 23314 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
| 23315 | |
| 23316 | return cu_headerp->offset_size; |
| 23317 | } |
| 23318 | |
| 23319 | /* See read.h. */ |
| 23320 | |
| 23321 | int |
| 23322 | dwarf2_per_cu_data::ref_addr_size () const |
| 23323 | { |
| 23324 | struct comp_unit_head cu_header_local; |
| 23325 | const struct comp_unit_head *cu_headerp; |
| 23326 | |
| 23327 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
| 23328 | |
| 23329 | if (cu_headerp->version == 2) |
| 23330 | return cu_headerp->addr_size; |
| 23331 | else |
| 23332 | return cu_headerp->offset_size; |
| 23333 | } |
| 23334 | |
| 23335 | /* See read.h. */ |
| 23336 | |
| 23337 | CORE_ADDR |
| 23338 | dwarf2_per_cu_data::text_offset () const |
| 23339 | { |
| 23340 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23341 | |
| 23342 | return objfile->text_section_offset (); |
| 23343 | } |
| 23344 | |
| 23345 | /* See read.h. */ |
| 23346 | |
| 23347 | struct type * |
| 23348 | dwarf2_per_cu_data::addr_type () const |
| 23349 | { |
| 23350 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23351 | struct type *void_type = objfile_type (objfile)->builtin_void; |
| 23352 | struct type *addr_type = lookup_pointer_type (void_type); |
| 23353 | int addr_size = this->addr_size (); |
| 23354 | |
| 23355 | if (TYPE_LENGTH (addr_type) == addr_size) |
| 23356 | return addr_type; |
| 23357 | |
| 23358 | addr_type = addr_sized_int_type (TYPE_UNSIGNED (addr_type)); |
| 23359 | return addr_type; |
| 23360 | } |
| 23361 | |
| 23362 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
| 23363 | the index of the result, and that searches a vector. It will |
| 23364 | return a result even if the offset in question does not actually |
| 23365 | occur in any CU. This is separate so that it can be unit |
| 23366 | tested. */ |
| 23367 | |
| 23368 | static int |
| 23369 | dwarf2_find_containing_comp_unit |
| 23370 | (sect_offset sect_off, |
| 23371 | unsigned int offset_in_dwz, |
| 23372 | const std::vector<dwarf2_per_cu_data *> &all_comp_units) |
| 23373 | { |
| 23374 | int low, high; |
| 23375 | |
| 23376 | low = 0; |
| 23377 | high = all_comp_units.size () - 1; |
| 23378 | while (high > low) |
| 23379 | { |
| 23380 | struct dwarf2_per_cu_data *mid_cu; |
| 23381 | int mid = low + (high - low) / 2; |
| 23382 | |
| 23383 | mid_cu = all_comp_units[mid]; |
| 23384 | if (mid_cu->is_dwz > offset_in_dwz |
| 23385 | || (mid_cu->is_dwz == offset_in_dwz |
| 23386 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
| 23387 | high = mid; |
| 23388 | else |
| 23389 | low = mid + 1; |
| 23390 | } |
| 23391 | gdb_assert (low == high); |
| 23392 | return low; |
| 23393 | } |
| 23394 | |
| 23395 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
| 23396 | the DIE at OFFSET. Raises an error on failure. */ |
| 23397 | |
| 23398 | static struct dwarf2_per_cu_data * |
| 23399 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
| 23400 | unsigned int offset_in_dwz, |
| 23401 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 23402 | { |
| 23403 | int low |
| 23404 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
| 23405 | dwarf2_per_objfile->all_comp_units); |
| 23406 | struct dwarf2_per_cu_data *this_cu |
| 23407 | = dwarf2_per_objfile->all_comp_units[low]; |
| 23408 | |
| 23409 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
| 23410 | { |
| 23411 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
| 23412 | error (_("Dwarf Error: could not find partial DIE containing " |
| 23413 | "offset %s [in module %s]"), |
| 23414 | sect_offset_str (sect_off), |
| 23415 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
| 23416 | |
| 23417 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
| 23418 | <= sect_off); |
| 23419 | return dwarf2_per_objfile->all_comp_units[low-1]; |
| 23420 | } |
| 23421 | else |
| 23422 | { |
| 23423 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
| 23424 | && sect_off >= this_cu->sect_off + this_cu->length) |
| 23425 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
| 23426 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
| 23427 | return this_cu; |
| 23428 | } |
| 23429 | } |
| 23430 | |
| 23431 | #if GDB_SELF_TEST |
| 23432 | |
| 23433 | namespace selftests { |
| 23434 | namespace find_containing_comp_unit { |
| 23435 | |
| 23436 | static void |
| 23437 | run_test () |
| 23438 | { |
| 23439 | struct dwarf2_per_cu_data one {}; |
| 23440 | struct dwarf2_per_cu_data two {}; |
| 23441 | struct dwarf2_per_cu_data three {}; |
| 23442 | struct dwarf2_per_cu_data four {}; |
| 23443 | |
| 23444 | one.length = 5; |
| 23445 | two.sect_off = sect_offset (one.length); |
| 23446 | two.length = 7; |
| 23447 | |
| 23448 | three.length = 5; |
| 23449 | three.is_dwz = 1; |
| 23450 | four.sect_off = sect_offset (three.length); |
| 23451 | four.length = 7; |
| 23452 | four.is_dwz = 1; |
| 23453 | |
| 23454 | std::vector<dwarf2_per_cu_data *> units; |
| 23455 | units.push_back (&one); |
| 23456 | units.push_back (&two); |
| 23457 | units.push_back (&three); |
| 23458 | units.push_back (&four); |
| 23459 | |
| 23460 | int result; |
| 23461 | |
| 23462 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); |
| 23463 | SELF_CHECK (units[result] == &one); |
| 23464 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); |
| 23465 | SELF_CHECK (units[result] == &one); |
| 23466 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); |
| 23467 | SELF_CHECK (units[result] == &two); |
| 23468 | |
| 23469 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); |
| 23470 | SELF_CHECK (units[result] == &three); |
| 23471 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); |
| 23472 | SELF_CHECK (units[result] == &three); |
| 23473 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); |
| 23474 | SELF_CHECK (units[result] == &four); |
| 23475 | } |
| 23476 | |
| 23477 | } |
| 23478 | } |
| 23479 | |
| 23480 | #endif /* GDB_SELF_TEST */ |
| 23481 | |
| 23482 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
| 23483 | |
| 23484 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
| 23485 | : per_cu (per_cu_), |
| 23486 | mark (false), |
| 23487 | has_loclist (false), |
| 23488 | checked_producer (false), |
| 23489 | producer_is_gxx_lt_4_6 (false), |
| 23490 | producer_is_gcc_lt_4_3 (false), |
| 23491 | producer_is_icc (false), |
| 23492 | producer_is_icc_lt_14 (false), |
| 23493 | producer_is_codewarrior (false), |
| 23494 | processing_has_namespace_info (false) |
| 23495 | { |
| 23496 | per_cu->cu = this; |
| 23497 | } |
| 23498 | |
| 23499 | /* Destroy a dwarf2_cu. */ |
| 23500 | |
| 23501 | dwarf2_cu::~dwarf2_cu () |
| 23502 | { |
| 23503 | per_cu->cu = NULL; |
| 23504 | } |
| 23505 | |
| 23506 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ |
| 23507 | |
| 23508 | static void |
| 23509 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
| 23510 | enum language pretend_language) |
| 23511 | { |
| 23512 | struct attribute *attr; |
| 23513 | |
| 23514 | /* Set the language we're debugging. */ |
| 23515 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); |
| 23516 | if (attr != nullptr) |
| 23517 | set_cu_language (DW_UNSND (attr), cu); |
| 23518 | else |
| 23519 | { |
| 23520 | cu->language = pretend_language; |
| 23521 | cu->language_defn = language_def (cu->language); |
| 23522 | } |
| 23523 | |
| 23524 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
| 23525 | } |
| 23526 | |
| 23527 | /* Increase the age counter on each cached compilation unit, and free |
| 23528 | any that are too old. */ |
| 23529 | |
| 23530 | static void |
| 23531 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 23532 | { |
| 23533 | struct dwarf2_per_cu_data *per_cu, **last_chain; |
| 23534 | |
| 23535 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); |
| 23536 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 23537 | while (per_cu != NULL) |
| 23538 | { |
| 23539 | per_cu->cu->last_used ++; |
| 23540 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
| 23541 | dwarf2_mark (per_cu->cu); |
| 23542 | per_cu = per_cu->cu->read_in_chain; |
| 23543 | } |
| 23544 | |
| 23545 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 23546 | last_chain = &dwarf2_per_objfile->read_in_chain; |
| 23547 | while (per_cu != NULL) |
| 23548 | { |
| 23549 | struct dwarf2_per_cu_data *next_cu; |
| 23550 | |
| 23551 | next_cu = per_cu->cu->read_in_chain; |
| 23552 | |
| 23553 | if (!per_cu->cu->mark) |
| 23554 | { |
| 23555 | delete per_cu->cu; |
| 23556 | *last_chain = next_cu; |
| 23557 | } |
| 23558 | else |
| 23559 | last_chain = &per_cu->cu->read_in_chain; |
| 23560 | |
| 23561 | per_cu = next_cu; |
| 23562 | } |
| 23563 | } |
| 23564 | |
| 23565 | /* Remove a single compilation unit from the cache. */ |
| 23566 | |
| 23567 | static void |
| 23568 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
| 23569 | { |
| 23570 | struct dwarf2_per_cu_data *per_cu, **last_chain; |
| 23571 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23572 | = target_per_cu->dwarf2_per_objfile; |
| 23573 | |
| 23574 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 23575 | last_chain = &dwarf2_per_objfile->read_in_chain; |
| 23576 | while (per_cu != NULL) |
| 23577 | { |
| 23578 | struct dwarf2_per_cu_data *next_cu; |
| 23579 | |
| 23580 | next_cu = per_cu->cu->read_in_chain; |
| 23581 | |
| 23582 | if (per_cu == target_per_cu) |
| 23583 | { |
| 23584 | delete per_cu->cu; |
| 23585 | per_cu->cu = NULL; |
| 23586 | *last_chain = next_cu; |
| 23587 | break; |
| 23588 | } |
| 23589 | else |
| 23590 | last_chain = &per_cu->cu->read_in_chain; |
| 23591 | |
| 23592 | per_cu = next_cu; |
| 23593 | } |
| 23594 | } |
| 23595 | |
| 23596 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
| 23597 | We store these in a hash table separate from the DIEs, and preserve them |
| 23598 | when the DIEs are flushed out of cache. |
| 23599 | |
| 23600 | The CU "per_cu" pointer is needed because offset alone is not enough to |
| 23601 | uniquely identify the type. A file may have multiple .debug_types sections, |
| 23602 | or the type may come from a DWO file. Furthermore, while it's more logical |
| 23603 | to use per_cu->section+offset, with Fission the section with the data is in |
| 23604 | the DWO file but we don't know that section at the point we need it. |
| 23605 | We have to use something in dwarf2_per_cu_data (or the pointer to it) |
| 23606 | because we can enter the lookup routine, get_die_type_at_offset, from |
| 23607 | outside this file, and thus won't necessarily have PER_CU->cu. |
| 23608 | Fortunately, PER_CU is stable for the life of the objfile. */ |
| 23609 | |
| 23610 | struct dwarf2_per_cu_offset_and_type |
| 23611 | { |
| 23612 | const struct dwarf2_per_cu_data *per_cu; |
| 23613 | sect_offset sect_off; |
| 23614 | struct type *type; |
| 23615 | }; |
| 23616 | |
| 23617 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
| 23618 | |
| 23619 | static hashval_t |
| 23620 | per_cu_offset_and_type_hash (const void *item) |
| 23621 | { |
| 23622 | const struct dwarf2_per_cu_offset_and_type *ofs |
| 23623 | = (const struct dwarf2_per_cu_offset_and_type *) item; |
| 23624 | |
| 23625 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
| 23626 | } |
| 23627 | |
| 23628 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
| 23629 | |
| 23630 | static int |
| 23631 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
| 23632 | { |
| 23633 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
| 23634 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; |
| 23635 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs |
| 23636 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; |
| 23637 | |
| 23638 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
| 23639 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
| 23640 | } |
| 23641 | |
| 23642 | /* Set the type associated with DIE to TYPE. Save it in CU's hash |
| 23643 | table if necessary. For convenience, return TYPE. |
| 23644 | |
| 23645 | The DIEs reading must have careful ordering to: |
| 23646 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
| 23647 | reading current DIE. |
| 23648 | * Not trying to dereference contents of still incompletely read in types |
| 23649 | while reading in other DIEs. |
| 23650 | * Enable referencing still incompletely read in types just by a pointer to |
| 23651 | the type without accessing its fields. |
| 23652 | |
| 23653 | Therefore caller should follow these rules: |
| 23654 | * Try to fetch any prerequisite types we may need to build this DIE type |
| 23655 | before building the type and calling set_die_type. |
| 23656 | * After building type call set_die_type for current DIE as soon as |
| 23657 | possible before fetching more types to complete the current type. |
| 23658 | * Make the type as complete as possible before fetching more types. */ |
| 23659 | |
| 23660 | static struct type * |
| 23661 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
| 23662 | { |
| 23663 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23664 | = cu->per_cu->dwarf2_per_objfile; |
| 23665 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
| 23666 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 23667 | struct attribute *attr; |
| 23668 | struct dynamic_prop prop; |
| 23669 | |
| 23670 | /* For Ada types, make sure that the gnat-specific data is always |
| 23671 | initialized (if not already set). There are a few types where |
| 23672 | we should not be doing so, because the type-specific area is |
| 23673 | already used to hold some other piece of info (eg: TYPE_CODE_FLT |
| 23674 | where the type-specific area is used to store the floatformat). |
| 23675 | But this is not a problem, because the gnat-specific information |
| 23676 | is actually not needed for these types. */ |
| 23677 | if (need_gnat_info (cu) |
| 23678 | && type->code () != TYPE_CODE_FUNC |
| 23679 | && type->code () != TYPE_CODE_FLT |
| 23680 | && type->code () != TYPE_CODE_METHODPTR |
| 23681 | && type->code () != TYPE_CODE_MEMBERPTR |
| 23682 | && type->code () != TYPE_CODE_METHOD |
| 23683 | && !HAVE_GNAT_AUX_INFO (type)) |
| 23684 | INIT_GNAT_SPECIFIC (type); |
| 23685 | |
| 23686 | /* Read DW_AT_allocated and set in type. */ |
| 23687 | attr = dwarf2_attr (die, DW_AT_allocated, cu); |
| 23688 | if (attr != NULL && attr->form_is_block ()) |
| 23689 | { |
| 23690 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
| 23691 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
| 23692 | type->add_dyn_prop (DYN_PROP_ALLOCATED, prop); |
| 23693 | } |
| 23694 | else if (attr != NULL) |
| 23695 | { |
| 23696 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
| 23697 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
| 23698 | sect_offset_str (die->sect_off)); |
| 23699 | } |
| 23700 | |
| 23701 | /* Read DW_AT_associated and set in type. */ |
| 23702 | attr = dwarf2_attr (die, DW_AT_associated, cu); |
| 23703 | if (attr != NULL && attr->form_is_block ()) |
| 23704 | { |
| 23705 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
| 23706 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
| 23707 | type->add_dyn_prop (DYN_PROP_ASSOCIATED, prop); |
| 23708 | } |
| 23709 | else if (attr != NULL) |
| 23710 | { |
| 23711 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
| 23712 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
| 23713 | sect_offset_str (die->sect_off)); |
| 23714 | } |
| 23715 | |
| 23716 | /* Read DW_AT_data_location and set in type. */ |
| 23717 | attr = dwarf2_attr (die, DW_AT_data_location, cu); |
| 23718 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
| 23719 | cu->per_cu->addr_type ())) |
| 23720 | type->add_dyn_prop (DYN_PROP_DATA_LOCATION, prop); |
| 23721 | |
| 23722 | if (dwarf2_per_objfile->die_type_hash == NULL) |
| 23723 | dwarf2_per_objfile->die_type_hash |
| 23724 | = htab_up (htab_create_alloc (127, |
| 23725 | per_cu_offset_and_type_hash, |
| 23726 | per_cu_offset_and_type_eq, |
| 23727 | NULL, xcalloc, xfree)); |
| 23728 | |
| 23729 | ofs.per_cu = cu->per_cu; |
| 23730 | ofs.sect_off = die->sect_off; |
| 23731 | ofs.type = type; |
| 23732 | slot = (struct dwarf2_per_cu_offset_and_type **) |
| 23733 | htab_find_slot (dwarf2_per_objfile->die_type_hash.get (), &ofs, INSERT); |
| 23734 | if (*slot) |
| 23735 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
| 23736 | sect_offset_str (die->sect_off)); |
| 23737 | *slot = XOBNEW (&objfile->objfile_obstack, |
| 23738 | struct dwarf2_per_cu_offset_and_type); |
| 23739 | **slot = ofs; |
| 23740 | return type; |
| 23741 | } |
| 23742 | |
| 23743 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
| 23744 | or return NULL if the die does not have a saved type. */ |
| 23745 | |
| 23746 | static struct type * |
| 23747 | get_die_type_at_offset (sect_offset sect_off, |
| 23748 | struct dwarf2_per_cu_data *per_cu) |
| 23749 | { |
| 23750 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
| 23751 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 23752 | |
| 23753 | if (dwarf2_per_objfile->die_type_hash == NULL) |
| 23754 | return NULL; |
| 23755 | |
| 23756 | ofs.per_cu = per_cu; |
| 23757 | ofs.sect_off = sect_off; |
| 23758 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
| 23759 | htab_find (dwarf2_per_objfile->die_type_hash.get (), &ofs)); |
| 23760 | if (slot) |
| 23761 | return slot->type; |
| 23762 | else |
| 23763 | return NULL; |
| 23764 | } |
| 23765 | |
| 23766 | /* Look up the type for DIE in CU in die_type_hash, |
| 23767 | or return NULL if DIE does not have a saved type. */ |
| 23768 | |
| 23769 | static struct type * |
| 23770 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) |
| 23771 | { |
| 23772 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
| 23773 | } |
| 23774 | |
| 23775 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
| 23776 | |
| 23777 | static void |
| 23778 | dwarf2_add_dependence (struct dwarf2_cu *cu, |
| 23779 | struct dwarf2_per_cu_data *ref_per_cu) |
| 23780 | { |
| 23781 | void **slot; |
| 23782 | |
| 23783 | if (cu->dependencies == NULL) |
| 23784 | cu->dependencies |
| 23785 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, |
| 23786 | NULL, &cu->comp_unit_obstack, |
| 23787 | hashtab_obstack_allocate, |
| 23788 | dummy_obstack_deallocate); |
| 23789 | |
| 23790 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); |
| 23791 | if (*slot == NULL) |
| 23792 | *slot = ref_per_cu; |
| 23793 | } |
| 23794 | |
| 23795 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
| 23796 | Set the mark field in every compilation unit in the |
| 23797 | cache that we must keep because we are keeping CU. */ |
| 23798 | |
| 23799 | static int |
| 23800 | dwarf2_mark_helper (void **slot, void *data) |
| 23801 | { |
| 23802 | struct dwarf2_per_cu_data *per_cu; |
| 23803 | |
| 23804 | per_cu = (struct dwarf2_per_cu_data *) *slot; |
| 23805 | |
| 23806 | /* cu->dependencies references may not yet have been ever read if QUIT aborts |
| 23807 | reading of the chain. As such dependencies remain valid it is not much |
| 23808 | useful to track and undo them during QUIT cleanups. */ |
| 23809 | if (per_cu->cu == NULL) |
| 23810 | return 1; |
| 23811 | |
| 23812 | if (per_cu->cu->mark) |
| 23813 | return 1; |
| 23814 | per_cu->cu->mark = true; |
| 23815 | |
| 23816 | if (per_cu->cu->dependencies != NULL) |
| 23817 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); |
| 23818 | |
| 23819 | return 1; |
| 23820 | } |
| 23821 | |
| 23822 | /* Set the mark field in CU and in every other compilation unit in the |
| 23823 | cache that we must keep because we are keeping CU. */ |
| 23824 | |
| 23825 | static void |
| 23826 | dwarf2_mark (struct dwarf2_cu *cu) |
| 23827 | { |
| 23828 | if (cu->mark) |
| 23829 | return; |
| 23830 | cu->mark = true; |
| 23831 | if (cu->dependencies != NULL) |
| 23832 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); |
| 23833 | } |
| 23834 | |
| 23835 | static void |
| 23836 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) |
| 23837 | { |
| 23838 | while (per_cu) |
| 23839 | { |
| 23840 | per_cu->cu->mark = false; |
| 23841 | per_cu = per_cu->cu->read_in_chain; |
| 23842 | } |
| 23843 | } |
| 23844 | |
| 23845 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
| 23846 | is its offset in .debug_info for this objfile. */ |
| 23847 | |
| 23848 | static hashval_t |
| 23849 | partial_die_hash (const void *item) |
| 23850 | { |
| 23851 | const struct partial_die_info *part_die |
| 23852 | = (const struct partial_die_info *) item; |
| 23853 | |
| 23854 | return to_underlying (part_die->sect_off); |
| 23855 | } |
| 23856 | |
| 23857 | /* Trivial comparison function for partial_die_info structures: two DIEs |
| 23858 | are equal if they have the same offset. */ |
| 23859 | |
| 23860 | static int |
| 23861 | partial_die_eq (const void *item_lhs, const void *item_rhs) |
| 23862 | { |
| 23863 | const struct partial_die_info *part_die_lhs |
| 23864 | = (const struct partial_die_info *) item_lhs; |
| 23865 | const struct partial_die_info *part_die_rhs |
| 23866 | = (const struct partial_die_info *) item_rhs; |
| 23867 | |
| 23868 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
| 23869 | } |
| 23870 | |
| 23871 | struct cmd_list_element *set_dwarf_cmdlist; |
| 23872 | struct cmd_list_element *show_dwarf_cmdlist; |
| 23873 | |
| 23874 | static void |
| 23875 | show_check_physname (struct ui_file *file, int from_tty, |
| 23876 | struct cmd_list_element *c, const char *value) |
| 23877 | { |
| 23878 | fprintf_filtered (file, |
| 23879 | _("Whether to check \"physname\" is %s.\n"), |
| 23880 | value); |
| 23881 | } |
| 23882 | |
| 23883 | void _initialize_dwarf2_read (); |
| 23884 | void |
| 23885 | _initialize_dwarf2_read () |
| 23886 | { |
| 23887 | add_basic_prefix_cmd ("dwarf", class_maintenance, _("\ |
| 23888 | Set DWARF specific variables.\n\ |
| 23889 | Configure DWARF variables such as the cache size."), |
| 23890 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
| 23891 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
| 23892 | |
| 23893 | add_show_prefix_cmd ("dwarf", class_maintenance, _("\ |
| 23894 | Show DWARF specific variables.\n\ |
| 23895 | Show DWARF variables such as the cache size."), |
| 23896 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
| 23897 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
| 23898 | |
| 23899 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
| 23900 | &dwarf_max_cache_age, _("\ |
| 23901 | Set the upper bound on the age of cached DWARF compilation units."), _("\ |
| 23902 | Show the upper bound on the age of cached DWARF compilation units."), _("\ |
| 23903 | A higher limit means that cached compilation units will be stored\n\ |
| 23904 | in memory longer, and more total memory will be used. Zero disables\n\ |
| 23905 | caching, which can slow down startup."), |
| 23906 | NULL, |
| 23907 | show_dwarf_max_cache_age, |
| 23908 | &set_dwarf_cmdlist, |
| 23909 | &show_dwarf_cmdlist); |
| 23910 | |
| 23911 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
| 23912 | Set debugging of the DWARF reader."), _("\ |
| 23913 | Show debugging of the DWARF reader."), _("\ |
| 23914 | When enabled (non-zero), debugging messages are printed during DWARF\n\ |
| 23915 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
| 23916 | information. A value greater than 1 provides more verbose information."), |
| 23917 | NULL, |
| 23918 | NULL, |
| 23919 | &setdebuglist, &showdebuglist); |
| 23920 | |
| 23921 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
| 23922 | Set debugging of the DWARF DIE reader."), _("\ |
| 23923 | Show debugging of the DWARF DIE reader."), _("\ |
| 23924 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
| 23925 | The value is the maximum depth to print."), |
| 23926 | NULL, |
| 23927 | NULL, |
| 23928 | &setdebuglist, &showdebuglist); |
| 23929 | |
| 23930 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
| 23931 | Set debugging of the dwarf line reader."), _("\ |
| 23932 | Show debugging of the dwarf line reader."), _("\ |
| 23933 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ |
| 23934 | A value of 1 (one) provides basic information.\n\ |
| 23935 | A value greater than 1 provides more verbose information."), |
| 23936 | NULL, |
| 23937 | NULL, |
| 23938 | &setdebuglist, &showdebuglist); |
| 23939 | |
| 23940 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
| 23941 | Set cross-checking of \"physname\" code against demangler."), _("\ |
| 23942 | Show cross-checking of \"physname\" code against demangler."), _("\ |
| 23943 | When enabled, GDB's internal \"physname\" code is checked against\n\ |
| 23944 | the demangler."), |
| 23945 | NULL, show_check_physname, |
| 23946 | &setdebuglist, &showdebuglist); |
| 23947 | |
| 23948 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
| 23949 | no_class, &use_deprecated_index_sections, _("\ |
| 23950 | Set whether to use deprecated gdb_index sections."), _("\ |
| 23951 | Show whether to use deprecated gdb_index sections."), _("\ |
| 23952 | When enabled, deprecated .gdb_index sections are used anyway.\n\ |
| 23953 | Normally they are ignored either because of a missing feature or\n\ |
| 23954 | performance issue.\n\ |
| 23955 | Warning: This option must be enabled before gdb reads the file."), |
| 23956 | NULL, |
| 23957 | NULL, |
| 23958 | &setlist, &showlist); |
| 23959 | |
| 23960 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
| 23961 | &dwarf2_locexpr_funcs); |
| 23962 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, |
| 23963 | &dwarf2_loclist_funcs); |
| 23964 | |
| 23965 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, |
| 23966 | &dwarf2_block_frame_base_locexpr_funcs); |
| 23967 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, |
| 23968 | &dwarf2_block_frame_base_loclist_funcs); |
| 23969 | |
| 23970 | #if GDB_SELF_TEST |
| 23971 | selftests::register_test ("dw2_expand_symtabs_matching", |
| 23972 | selftests::dw2_expand_symtabs_matching::run_test); |
| 23973 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
| 23974 | selftests::find_containing_comp_unit::run_test); |
| 23975 | #endif |
| 23976 | } |